U.S. patent application number 14/684165 was filed with the patent office on 2015-07-30 for forklift fuel cell supply system.
The applicant listed for this patent is INFINTIUM FUEL CELL SYSTEMS (SHANGHAI) CO., LTD.. Invention is credited to Xuxu Ge.
Application Number | 20150210185 14/684165 |
Document ID | / |
Family ID | 47483196 |
Filed Date | 2015-07-30 |
United States Patent
Application |
20150210185 |
Kind Code |
A1 |
Ge; Xuxu |
July 30, 2015 |
Forklift Fuel Cell Supply System
Abstract
This invention provides a forklift fuel cell supply system
consists of enclosure 90 and the fuel cell system 100, DCDC
converting unit 2, contactor 3, energy storage device 4, controller
7 provided in the said enclosure 90, which also consists of the
power supply output end 5 provided outside the said enclosure 90
and the operation control unit 6 provided in the said enclosure 90,
in which the said contactor 3 is a normal open type high-current
contactor, the said DCDC converting unit 2 includes the DCDC
converter 21 and high-power diode 22 connecting with it. This
invention is compact in structure and facilitates such work as
system installation, overhaul and maintenance, etc. This invention
can contain an energy storage device with a higher capacity, making
the energy storage device be in a charging and discharging
condition with a low multiplying factor and extending the service
life of the energy storage device and the time for which the system
can be left unused.
Inventors: |
Ge; Xuxu; (Shanghai,
CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
INFINTIUM FUEL CELL SYSTEMS (SHANGHAI) CO., LTD. |
Shanghai |
|
CN |
|
|
Family ID: |
47483196 |
Appl. No.: |
14/684165 |
Filed: |
April 10, 2015 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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14366011 |
Jun 17, 2014 |
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14684165 |
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PCT/CN2013/083379 |
Sep 12, 2013 |
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14366011 |
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Current U.S.
Class: |
307/9.1 |
Current CPC
Class: |
Y02E 60/10 20130101;
H01M 2250/20 20130101; B60L 58/40 20190201; B60L 11/1887 20130101;
Y02E 60/50 20130101; H01M 8/04298 20130101; H01M 2010/4278
20130101; H01M 16/006 20130101; H01M 16/003 20130101; H01M 8/04
20130101; B60L 50/71 20190201; Y02T 90/40 20130101; B60L 50/72
20190201; Y02T 10/70 20130101 |
International
Class: |
B60L 11/18 20060101
B60L011/18 |
Foreign Application Data
Date |
Code |
Application Number |
Sep 28, 2012 |
CN |
201210375871 |
Claims
1. A forklift fuel cell supply system consists of enclosure 90 and
the fuel cell system 100, DCDC converting unit 2, contactor 3,
energy storage device 4, controller 7 provided in the said
enclosure 90, which also consists of the power supply output end 5
provided outside the said enclosure 90 and the operation control
unit 6 provided in the said enclosure 90, in which the said
contactor 3 is a normal open type high-current contactor, the said
DCDC converting unit 2 includes the DCDC converter 21 and
high-power diode 22 connecting with it, The said fuel cell system
100 connects the said DCDC converting unit 2, contactor 3, power
supply output end 5, the said controller 7 connects the said fuel
cell system 100, operation control unit 6, contactor 3, the said
energy storage device 4 connects the said controller 7, operation
control unit 6 and contactor 3.
2. According to claim 1, the said fuel cell system 100, energy
storage device 4, DCDC converting unit 2 are installed in proper
order on the base plate of the said enclosure 90 along the said
enclosure 90 in a direction from front to back.
3. According to claim 1, the installation positions of both the
said operation control unit 6 and controller 7 are higher than that
of the said DCDC converting unit 2 and energy storage device 4.
4. According to claim 1, the said operation control unit 6 and
controller 7 are installed in proper order along the said enclosure
90 in a direction from front to back.
5. According to claim 1, the said contactor 3 is installed in the
area located between the side board of the said enclosure 90 and
the said energy storage device 4 on the said base plate.
6. According to claim 1, the electric isolation board 901, the
hydrogen storage system, the filling valve 95 provided in the said
enclosure 90 are also included, the said electric isolation board
901 divides the space of the said enclosure 90 into an electronic
system space and a gas supply space, the said fuel cell system 100,
DCDC converting unit 2, contactor 3, energy storage device 4,
controller 7, operation control unit 6 are located in the said
electronic system space, the said hydrogen storage system, filling
valve 95 are located in the said gas supply space, the said gas
supply space is located on one side of the said electronic system
space.
7. According to claim 1, the output end of the fuel cell 1 that the
said fuel cell system 100 contains connects the input end of the
said DCDC converting unit 2, the DCDC converting unit 2 connects
through the said contactor 3 the said energy storage device 4, the
output end of the said DCDC converting unit 2 also connects the
said power supply output end 5 and the high-power auxiliary
component 80 that the said fuel cell system 100 contains, the port
of the said energy storage device 4 connects through the said
contactor 3 the said power supply output end 5 and the high-power
auxiliary component 80 that the said fuel cell system 100 contains,
the said operation control unit 6 connects respectively the said
energy storage device 4, DCDC converting unit 2, controller 7, the
said controller 7 connects respectively the fuel cell that the said
fuel cell system 100 contains, auxiliary system 8, DCDC converting
unit 2, the control end of contactor 3, the energy storage device
4, in which the said auxiliary system 8 includes the said
high-power auxiliary component 80, the said operation control unit
6 is used to receive operation signals and supplies power for the
said controller 7 and DCDC converting unit 2, the said controller 7
is used to receive the operation instructions generated by the said
operation control unit 6 according to the said operation signals
and control according to the said operation instructions the said
contactor 3, DCDC converting unit 2, auxiliary system 8, the said
controller 7 is also used to measure the state parameters of the
fuel cell 1 that the said fuel cell system 100 contains, measure
the state parameters of the said energy storage device 4, measure
the state parameters of the said auxiliary system and receive the
state data of the said DCDC converting unit 2.
8. According to claim 1, the output end of the said fuel cell 1
connects the input end of the said DCDC converter 21, the positive
pole of the output end of the said DCDC converter 21 connects the
positive pole of the said high-power diode 22, the negative pole of
the said high-power diode 22 connects through the said contactor 3
the said energy storage device 4, the said DCDC converter 21
connects the said controller 7 and is controlled by the said
controller 7, the said DCDC converter 21 connects the said
operation control unit 6 and receives power supplied by the said
operation control unit 6.
9. According to claim 1, the said operation control unit 6 changes
the electric connection state with the said DCDC converting unit
and controller 7 according to the startup operation signal
received.
10. According to claim 1, the state data of the said DCDC
converting unit 2 include DCDC input current, DCDC input
voltage.
11. According to claim 1, any one or more types of following
devices are also included: Hydrogen safety system, the said
hydrogen safety system include the sensors placed respectively in
the electronic control system space and gas supply space, the said
sensors connect the said controller 7; Monitoring display 91, with
the said monitoring display 91 connecting the said controller 7, ON
and OFF button 92, with the said ON and OFF button 92 connecting
respectively the said operation control unit 6 and controller 7;
Remote control 93, the said remote control 93 connecting in a radio
mode the said operation control unit 6; and Emergency stop button
94, with the said emergency stop button 94 connecting the said
operation control unit 6.
Description
PRIORITY
[0001] The present invention claims priority to U.S. patent
application Ser. No. 14/366,011 which claims priority to PCT patent
application PCT/CN2013/083379, which has a filing date of Sep. 12,
2013 and claims priority to Chinese patent application
201210376341, which has a filing date of Sep. 28, 2012.
FIELD OF THE INVENTION
[0002] This invention relates to the new energy field, specifically
to a forklift fuel cell supply system.
BACKGROUND
[0003] When designing a forklift fuel cell system, in order to
replace with the existing lead-acid battery directly to avoid
forklift modification, all parts and components have to be
centralized in a rectangular empty chamber. The forklift fuel cell
system needs to include controller, energy storage device, DCDC
converter, contactor, fuel cell system, hydrogen filling valve,
hydrogen bottle, hydrogen system, etc. In order for the system to
reach a weight equal to that of lead-acid battery, weights have to
be placed. The parts and components required by the whole system
are integrated in a narrow space, resulting in space being not
available between parts and components. This may bring a very high
trouble to installation, disassembly. Even when disassembling some
parts and components, other parts and components have to be removed
first.
[0004] The existing technology has a lot of disadvantages. Some
design reduces system function; some design adopts an energy
storage device with a small size and a small capacity, resulting in
reduction in system performance; some design even has the hydrogen
bottle be placed outside the system; some design provides almost no
space for moving between parts and components in the system, as a
result, when disassembling a part and component, other parts and
components have to be removed; some design has no space in the
system for the emergency stop button and relies on the emergency
stop button designed for the hydrogen filling system, this may
result in being unable to close the system quickly under an
exceptional system emergency condition.
[0005] The technical scheme publicized by the utility model patent
of China called "forklift gas bottle fixing device" with
application number "200820233706.2" has the gas bottle be placed at
the back end of a forklift, when using, it is necessary to change
the hydrogen bottle, this also needs a lot of time. At the same
time, placing a gas bottle at back of a forklift is very unsafe.
Due to system being not compact, that scheme is unable to place the
hydrogen bottle inside the system.
[0006] The Canadian patent called "FUEL CELL INDUSTRIAL VEHICLE"
with publication number "CA2659135A1" provides a fuel cell forklift
system scheme and redesigns the whole forklift. No direct
replacement of the existing forklift cell can be made.
[0007] The utility model patent of China called "a new type of
forklift" with application number "200920174236.1" provides a
technical scheme which also considers redesign of existing
vehicle.
[0008] The utility model patent of China called "a type of fuel
cell forklift" with application number "200820179687.X" provides a
technical scheme which also considers forklift redesign.
SUMMARY
[0009] Aimed at the defects in existing technology, the said
improved forklift fuel cell supply system solves the compact
problem with the forklift fuel cell system. The forklift fuel cell
has the whole system be placed in a rectangular empty chamber. Due
to dimensional limitation, there is almost no space for moving
between the parts and components. The line installation is
troublesome. Disassembly of parts and components are troublesome
with other parts and components having to be removed first. A space
for weights is reserved.
[0010] The said forklift fuel cell supply system consists of
enclosure and the fuel cell system, DCDC converting unit,
contactor, energy storage device, controller provided in the said
enclosure, which also consists of the power supply output end
provided outside the said enclosure and the operation control unit
6 provided in the said enclosure, in which the said contactor is a
normal open type high-current contactor, the said DCDC converting
unit includes the DCDC converter and high-power diode connecting
with it.
[0011] The said fuel cell system connects the said DCDC converting
unit, contactor, power supply output end, the said controller
connects the said fuel cell system, operation control unit,
contactor, the said energy storage device connects the said
controller, operation control unit and contactor.
[0012] Preferably, the said fuel cell system, energy storage
device, DCDC converting unit are installed in proper order on the
base plate of the said enclosure along the said enclosure in a
direction from front to back.
[0013] Preferably, the installation positions of both the said
operation control unit 6 and controller are higher than that of the
said DCDC converting unit and energy storage device.
[0014] Preferably, the said operation control unit and controller
are installed in proper order along the said enclosure in a
direction from front to back.
[0015] Preferably .quadrature.the said contactor is installed in
the area located between the side board of the said enclosure and
the said energy storage device on the said base plate.
[0016] Preferably, the electric isolation board, the hydrogen
storage system, the filling valve provided in the said enclosure
are also included, the said electric isolation board divides the
space of the said enclosure into an electronic system space and a
gas supply space, the said fuel cell system, DCDC converting unit,
contactor, energy storage device, controller, operation control
unit are located in the said electronic system space, the said
hydrogen storage system, filling valve are located in the said gas
supply space, the said gas supply space is located on one side of
the said electronic system space.
[0017] Preferably, the output end of the fuel cell that the said
fuel cell system contains connects the input end of the said DCDC
converting unit, the DCDC converting unit connects through the said
contactor the said energy storage device, the output end of the
said DCDC converting unit also connects the said power supply
output end and the high-power auxiliary component that the said
fuel cell system contains, the port of the said energy storage
device connects through the said contactor the said power supply
output end and the high-power auxiliary component that the said
fuel cell system contains, the said operation control unit connects
respectively the said energy storage device, DCDC converting unit,
controller, the said controller connects respectively the fuel cell
that the said fuel cell system contains, auxiliary system, DCDC
converting unit, the control end of contactor, the energy storage
device, in which the said auxiliary system includes the said
high-power auxiliary component.
[0018] The said operation control unit is used to receive operation
signals and supplies power for the said controller and DCDC
converting unit, the said controller is used to receive the
operation instructions generated by the said operation control unit
according to the said operation signals and control according to
the said operation instructions the said contactor, DCDC converting
unit, auxiliary system, the said controller is also used to measure
the state parameters of the fuel cell that the said fuel cell
system contains, measure the state parameters of the said energy
storage device, measure the state parameters of the said auxiliary
system and receive the state data of the said DCDC converting
unit.
[0019] Preferably, the output end of the said fuel cell connects
the input end of the said DCDC converter, the positive pole of the
output end of the said DCDC converter connects the positive pole of
the said high-power diode, the negative pole of the said high-power
diode connects through the said contactor the said energy storage
device, the said DCDC converter connects the said controller and is
controlled by the said controller, the said DCDC converter connects
the said operation control unit and receives power supplied by the
said operation control unit.
[0020] Preferably, the said operation control unit changes the
electric connection state with the said DCDC converting unit and
controller according to the startup operation signal received.
[0021] Preferably, the state data of the said DCDC converting unit
include DCDC input current, DCDC input voltage.
[0022] Preferably, any one or more types of following devices are
also included: [0023] Hydrogen safety system, the said hydrogen
safety system include the sensors placed respectively in the
electronic control system space and gas supply space, the said
sensors connect the said controller, [0024] Monitoring display,
with the said monitoring display connecting the said controller,
[0025] ON and OFF button, with the said ON and OFF button 92
connecting respectively the said operation control unit 6 and
controller, [0026] Remote control, the said remote control
connecting in a radio mode the said operation control unit, [0027]
Emergency stop button, with the said emergency stop button
connecting the said operation control unit.
[0028] Comparing with the existing technology, the said forklift
fuel cell supply system has the following beneficial effects:
[0029] 1) The energy storage device placed by the existing
technology in the system is small in capacity, making the energy
storage device be in a charging and discharging condition with a
high multiplying factor and reducing the service life of the energy
storage device. The said forklift fuel cell supply system can
contain an energy storage device with a higher capacity, making the
energy storage device be in a charging and discharging condition
with a low multiplying factor and extending the service life of the
energy storage device and the time for which the system can be left
unused. For example, in the circumstance that what is placed in the
energy storage device is a lithium ion battery, the lithium ion
battery placed as designed by the existing technology has a
capacity 32 AH, a peak output 48 KW. The lithium ion battery that
can be placed in the forklift fuel cell supply system has a
capacity 50 AH, a peak output 72 KW. When absorbing the forklift
braking at 600 A, the charging multiplying factor is 12C. That
value in the existing technology is 18C. A higher energy storage
device capacity reduces the charging and discharging multiplying
factor at the same current output and favors extension of battery
service life.
[0030] 2) The said forklift fuel cell supply system is compact in
structure and facilitates such work as system installation,
overhaul and maintenance, etc.
[0031] 3) In the enclosure, the operation control unit, controller
are placed on the top. In the circumstance when they are not used
by the system and moved outside forklift, inspection and
maintenance, failure recovery can be made. The controller control
software upgrading is also facilitated.
[0032] 4) Spaces are reserved between parts and components, parts
and components and enclosure, which facilitates line connection,
part and component removal.
[0033] 5) The compact structural design of the said forklift fuel
cell supply system allows placing of the emergency stop button. In
case of any emergency, the whole system can be disconnected
quickly.
[0034] 6) Such components as ON and OFF button, emergency stop
button, filling valve, etc. required by system operation are placed
at appropriate heights to facilitate filling, operation.
BRIEF DESCRIPTION OF THE DRAWINGS
[0035] By reading and referring to the detailed descriptions made
to the non-restrictive embodiment examples by the following
attached figures, other characteristics, purposes and advantages of
this invention will become more evident:
[0036] FIG. 1 is the schematic diagram of the general structure of
forklift fuel cell supply system;
[0037] FIG. 2 is the schematic diagram of the structure of the fuel
cell supply system according to this invention;
[0038] FIG. 3 is the specific structural schematic diagram of the
DCDC converting unit in the compact type fuel cell supply system as
shown in FIG. 2;
[0039] FIG. 4 shows the schematic diagram of the high-power diode
position in the compact type fuel cell supply system of a
preferable case of the first embodiment example provided according
to this invention;
[0040] FIG. 5 is embodiment A of forklift fuel cell supply
system;
[0041] FIG. 6 is embodiment B for forklift fuel cell supply
system;
DETAILED DESCRIPTION
[0042] A detailed description to this invention is to be made below
by combining with specific embodiment examples. The following
embodiment examples will help the technical personnel in this field
further understand this invention, but it does not limit this
invention in any form. It should be pointed out that for ordinary
technical people in this field, adjustments and changes can also be
made under the prerequisite of not being divorced from the
conceiving of this invention. All these belong to the protection
scope of this invention.
[0043] The said forklift fuel cell supply system consists of
enclosure 90 and the fuel cell system 100, DCDC converting unit 2,
contactor 3, energy storage device 4, controller 7, operation
control unit 6, electric isolation board 901, hydrogen storage
system, filling valve 95 provided in the said enclosure 90, which
also consists of the power supply output end 5 provided outside the
said enclosure 90. In which, the said contactor 3 is a normal open
type high-current contactor, the said DCDC converting unit 2
includes the DCDC converter 21 and high-power diode 22 connecting
with it. The said fuel cell system 100 connects the said DCDC
converting unit 2, contactor 3, power supply output end 5, the said
controller 7 connects the said fuel cell system 100, operation
control unit 6, contactor 3, the said energy storage device 4
connects the said controller 7, operation control unit 6, contactor
3.
[0044] The said fuel cell system 100, energy storage device 4, DCDC
converting unit 2 are installed in proper order on the base plate
of the said enclosure 90 along the said enclosure 90 in a direction
from front to back. The installing positions of both the said
operation control unit 6 and controller 7 are higher than that of
the said DCDC converting unit 2 and energy storage device 4. The
said operation control unit 6 and controller 7 are installed in
proper order along the said enclosure 90 in a direction from front
to back. The said contactor 3 is installed in the area located
between the side board of the said enclosure 90 and the said energy
storage device 4 on the said base plate.
[0045] The said electric isolation board 901 divides the space of
the said enclosure 90 into electronic system space and gas supply
space, the said fuel cell system 100, DCDC converting unit 2,
contactor 3, energy storage device 4, controller 7, operation
control unit 6 are located inside the said electronic system space,
the said hydrogen storage system, filling valve 95 are located in
the said gas supply space, the said gas supply space is located on
one side of the said electronic system space.
[0046] In a preferable case, the said forklift fuel cell supply
system also consists of hydrogen safety system, monitoring display
91, ON and OFF button 92, remote control 93, emergency stop button
94, in which the said hydrogen safety system consists of the
sensors placed respectively in the electronic control system space
and gas supply space, the said sensors connect the said controller
7, the said monitoring display 91 connects the said controller 7,
the said ON and OFF button 92 connects respectively the said
operation control unit 6 and controller 7, the said remote control
93 connects in a radio mode the said operation control unit 6, the
said emergency stop button 94 connects the said operation control
unit 6.
[0047] The said fuel cell system 100 consists of fuel cell 1 and
auxiliary system 8. The said auxiliary system 8 consists of air
supply system, cooling system, hydrogen system, the said high-power
auxiliary component 80 refers to a high-power component in the
auxiliary system (for example, fan, pump, heat dissipation fan).
The technical people in this field can refer to the existing
technology to accomplish the said auxiliary system 8 and its
high-power auxiliary component 80. No unnecessary detail is to be
given here.
[0048] FIG. 5 and FIG. 6 show the fuel cell supply systems in the
two embodiments according to the said forklift fuel cell supply
system. Specifically, FIG. 5 shows embodiment A-1: the 2-ton
electric forklift from a forklift plant uses Model 9PZS630 48V
lead-acid battery. That lead-acid battery is 1,070 mm long, 827 mm
wide, 520 mm high, weighs 1,070 kg with a voltage 48V. The working
voltage range of the forklift is 40-60V. The system is designed to
have a length 980 mm, a width 827 mm, a height 520 mm and a weight
1,070 Kg, the rated voltage of the system is 40-60V. FIG. 6 shows
embodiment A-2: the four-wheel counterbalanced type forklift from a
forklift plant using lead-acid battery is 982 mm long, 836 mm wide,
565 mm high and weighs 1,400 kg. The working voltage range of the
forklift is 40-60V. The system is designed to have a length 980 mm,
a width 827 mm, a height 565 mm and a weight 1400 Kg. The rated
voltage of the system is 40-60V. Being similar to embodiment A, it
has a counterweight layer added on the bottom to reach the required
forklift weight.
[0049] The reason that a compact structure as shown in FIG. 1 can
be designed for the said forklift fuel cell supply system is mainly
due to adopting the compact type fuel cell supply system as shown
in FIG. 2.
[0050] FIG. 2 is the schematic diagram of the structure of the
compact type fuel cell supply system of the first embodiment
example provided according to this invention, in this embodiment
example, the said compact type fuel cell supply system consists of
fuel cell 1, DCDC converting unit 2, contactor 3, energy storage
device 4, power supply output end 5, operation control unit 6,
controller 7, auxiliary system 8, in which the said contactor 3 is
a normal open type high-current contactor, the said DCDC converting
unit 2 includes DCDC converter 21 and high-power diode 22
connecting with it.
[0051] Specifically, the output end of the said fuel cell 1
connects the input end of the said DCDC converting unit 2, DCDC
converting unit 2 connects through the said contactor 3 the said
energy storage device 4, the output end of the said DCDC converting
unit 2 also connects the said power supply output end 5 and the
high-power auxiliary component 80 that the said auxiliary system 8
contains, the port of the said energy storage device 4 connects
through the said contactor 3 the said power supply output end 5 and
auxiliary system 8, the said operation control unit 6 connects
respectively the said energy storage device 4, DCDC converting unit
2, controller 7, the said controller 7 connects respectively the
said fuel cell 1, DCDC converting unit 2, the control end of
contactor 3, energy storage device 4 and auxiliary system 8.
[0052] In this embodiment example, the positive pole of the output
end of the said DCDC converting unit 2 connects through the said
contactor 3 the positive pole of the said energy storage device 4,
the negative pole of the output end of the said DCDC converting
unit 2 connects through the said contactor 3 the negative pole of
the said energy storage device 4, the positive pole of the said
energy storage device 4 connects through the said contactor 3 the
positive pole of the said power supply output end 5 and the
positive pole of auxiliary system 8, the negative pole of the said
energy storage device 4 connects directly the negative pole of the
said power supply output end 5 and the negative pole of auxiliary
system 8; and in a variation of this embodiment example, the
difference from the first embodiment example as shown in FIG. 2 is
that in this variation, the change of the said contactor 3 in
connecting position is: the said contactor 3 is connected between
the negative pole of the output end of the said DCDC converting
unit 2 and the negative pole of the said energy storage device 4,
and the positive pole of the output end of the said DCDC converting
unit 2 and the positive pole of the said energy storage device 4
are connected directly between them, correspondingly, the positive
pole of the said energy storage device 4 connects directly the
positive pole of the said power supply output end 5 and the
positive pole of auxiliary system 8, the negative pole of the said
energy storage device 4 connects through the said contactor 3 the
negative pole of the said power supply output end 5 and the
negative pole of auxiliary system 8. The technical people in this
field understand that the two connection modes for contactor 3 as
described in this natural paragraph can both realize "DCDC
converting unit 2 connecting through the said contactor 3 the said
energy storage device 4" and "the port of the said energy storage
device 4 connecting through the said contactor 3 the said power
supply output end 5 and auxiliary system 8".
[0053] The said auxiliary system 8 consists of air supply system,
cooling system, hydrogen system, hydrogen safety system, the said
high-power auxiliary component 80 refers to a high-power component
in the auxiliary system (for example, fan, pump, heat dissipation
fan). The technical people in this field can refer to the existing
technology to accomplish the said auxiliary system 8 and its
high-power auxiliary component 80. No unnecessary detail is to be
given here.
[0054] The said operation control unit 6 is used to receive
operation signals and supplies power for the said controller 7 and
DCDC converting unit 2, the said controller 7 is used to receive
the operation instructions generated by the said operation control
unit 6 according to the said operation signals and control
according to the said operation instructions the said contactor 3,
DCDC converting unit 2, auxiliary system 8, the said controller 7
is also used to measure the state parameters of the said fuel cell
1, measure the state parameters of the said energy storage device
4, measure the state parameters of the said auxiliary system 8 and
receive the state data of the said DCDC converting unit 2. The said
DCDC converter 21 consists of CAN communication module, input
voltage measurement module, input current measurement module,
output voltage measurement module, output current measurement
module. Preferably, DCDC converter 21 can control according to the
communication data of the CAN communication module the specific
numerical values of the output current, voltage; also outputs
through the CAN communication module such data as input voltage,
input current, output voltage, output current, etc. The state data
of the said DCDC converting unit 2 includes DCDC input current,
DCDC input voltage.
[0055] The said controller 7 is a controller with an integrated
design, which is equivalent to the scattered fuel cell controller,
whole vehicle controller, battery energy management system in the
invention patent application of China with patent application
number "200610011555.1"; further specifically, the said controller
7 can consist of energy management unit, fuel cell control unit,
energy storage device monitoring unit, hydrogen safety monitoring
unit, system failure monitoring unit and startup control unit.
[0056] More specifically, as shown in FIG. 3, the output end of the
said fuel cell 1 connects the input end of the said DCDC converter
21, the positive pole of the output end of the said DCDC converter
21 connects the positive pole of the said high-power diode 22,
negative pole of the said high-power diode 22 connects through the
said contactor 3 the said energy storage device 4, the said DCDC
converter 21 connects the said controller 7 and is controlled by
the said controller 7, the said DCDC converter 21 connects the said
operation control unit 6 and receives the power supplied by the
said operation control unit 6. And in a variation of this
embodiment example, the difference from the first embodiment
example as shown in FIG. 3 is that in this variation, the positive
pole of the output end of the said fuel cell 1 connects the
positive pole of the said high-power diode 22, the negative pole of
the said high-power diode 22 connects the positive pole of the
input end of the said DCDC converter 21, the negative pole of the
output end of the said fuel cell 1 connects directly the negative
pole of the input end of the said DCDC converter 21, the output end
of the said DCDC converter 21 directly connects through the said
contactor 3 the said energy storage device 4.
[0057] Further, in this embodiment example, the said compact type
fuel cell supply system also consists of monitoring display 91, ON
and OFF button 92, remote control 93, emergency stop button 94, in
which the said monitoring display 91 connects the said controller
7, the said ON and OFF button 92 connects respectively the said
operation control unit 6 and controller 7, the said remote control
93 connects in a radio mode the said operation control unit 6, the
said emergency stop button 94 connects the said operation control
unit 6. As shown in FIG. 1, when the said ON and OFF button 92 or
remote control 93 gives a startup signal, the said operation
control unit 6 supplies power to the said controller 7, the said
controller 7 outputs a control signal to the contactor used as a
switch to make it close, the said energy storage device 4 supplies
power through the said contactor 3 to the said high-power auxiliary
component 80, in the said auxiliary system 8, except the said
high-power auxiliary component 80, other devices (for example,
hydrogen system, hydrogen safety system) are supplied by the said
controller 7, at the same time, the said controller 7 outputs
signals to all modules constituting the said auxiliary system 8 to
start the said fuel cell 1; after starting, the said contactor 3
maintains the state of connection at all times. By adopting this
starting mode, it is not necessary to use additionally configured
auxiliary battery and auxiliary DC/DC converter for charging, as a
result, parts and components and corresponding lines are reduced,
system reliability is improved, space is saved, system volume and
costs are reduced.
[0058] In a preferable case of this embodiment example, as shown in
FIG. 4, the said high-power diode 22 is placed on the heat
dissipation passage of the said DCDC converter 21, this can use the
air discharged from the air duct 2101 by the heat dissipation fan
2102 contained by the said DCDC converter itself to dissipate heat
from the said high-power diode 22, as a result, the heat
dissipation fan on the heat dissipater 2201 (i.e. aluminum fin) for
the said high-power diode is saved, the volume of heat dissipater
is reduced, energy is saved, at the same time, the line to supply
power to that heat dissipation fan is also saved. The said
operation control unit 6 changes the electric connection state with
the said DCDC converting unit and controller 7 according to the
startup operation signal received. Thus, the said controller 7 is
in an operation condition only when the system is working and will
not lead to the problem of high system energy consumption due to
being always in an operation condition.
[0059] Next, the system working principle is described through a
preferable embodiment of this invention. Specifically, When the
system is not started, the said operation control unit 6 and the
said controller 7, DCDC converting unit 2 establish no electric
connection state between them. When the button of the said remote
control 93 or the said ON and OFF button 92 is depressed, the said
operation control unit 6 and the said controller 7, DCDC converting
unit 2 establish an electric connection between them, the said
energy storage device 4 supplies power through the said operation
control unit 6 to the said controller 7, the output signal of the
said controller 7 drives the said contactor 3 to get connected, the
said energy storage device 4 supplies power through the said
contactor 3 to the said high-power auxiliary component 80, in the
said auxiliary system 8, except the said high-power auxiliary
component 80, other devices (for example, hydrogen system, hydrogen
safety system) are supplied by the said controller 7, at the same
time, the said controller 7 outputs working signals to all modules
constituting the said auxiliary system 8 to start the said fuel
cell 1; the said fuel cell 1 outputs power to the said DCDC
converting unit 2, the said controller 7 controls according to the
received state data signals of the said fuel cell 1, energy storage
device 4, DCDC converting unit 2 the said DCDC converting unit 2
output current; under the normal system working condition, the
output voltage of the said DCDC converting unit 2 is higher than
the output voltage of the said energy storage device 4, the output
current of the said DCDC converting unit 2 is output through the
said power supply output end 5 to the small vehicle drive system
carrying the said fuel cell supply system to drive the small
vehicle to work, at the same time, the said DCDC converting unit 2
charges the said energy storage device 4, supplies power to the
said high-power auxiliary component 80, operation control unit 6;
when a small vehicle is in a high-power driving condition, the said
power supply output end 5 needs to output high power, high
currency, at this time, the said DCDC converting unit 2 output
current is not sufficient to satisfy the requirements, the said
energy storage device 4 will output current together with the said
DCDC converting unit 2 to the small vehicle driving system carrying
that fuel cell supply system through the said power supply output
end 5 to drive that small vehicle to maintain the high-power
driving condition; when the small vehicle is in a braking
condition, the power energy recovered by the brake charges through
the power supply output end the energy storage device.
[0060] When it is necessary to start the system, just depress the
button of the said remote control 93 or the said ON and OFF button
92, in the meantime that the said operation control unit 6 and the
said controller 7, DCDC converting unit 2 establish an electric
connection, the said operation control unit 6 outputs a switch
signal to the said controller 7, the said controller 7, after
receiving the switch signal, outputs a signal to maintain power
supply to the said operation control unit 6, so that the said
operation control unit 6 and the said controller 7, DCDC converting
unit 2 maintain an electric connection state; at the same time, the
said controller 7 also drives the indicator light of the said ON
and OFF button 92 to become on to prompt system starting; at this
time, the button of the said remote control 93 or the said ON and
OFF button 92 can be released.
[0061] When it is necessary to close the system, depress again the
button of the said remote control 93 or the said ON and OFF button
92, the said operation control unit 6 outputs a switch signal to
the said controller 7, the said controller 7, after receiving the
switch signal, controls the indicator light of the said ON and OFF
button 92 to blink (prompting switching off, at this time, the
button of the said remote control 93 or the said ON and OFF button
92 can be released), the said controller 7 simultaneously controls
the said auxiliary system 8 to stop working, and then stops
outputting the signal to maintain power supply to the said
operation control unit 6, so that the electric connection of the
said operation control unit 7 and the said controller 7, DCDC
converting unit 2 is disconnected; the whole system stops
working.
[0062] When the said emergency stop button 94 is depressed, the
electric connection between the said operation control unit 6 and
the said controller 7, DCDC converting unit 2 get disconnected
quickly to cut off the power supply to the whole system and make
the system stop working.
[0063] The said monitoring display 91 gets power, communication
data from the said controller 7, displays the system condition,
failure information, etc. on the screen.
[0064] The embodiment examples of this invention are described
above. What needs understanding is that that this invention is not
limited to above specific embodiments. The technical people in this
field can make various variations or modifications with the Claim,
and this does not influence the essential contents of this
invention.
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