Fuel cell power sources and power systems

Abstract

The application provides a fuel cell power supply and a power supply power system. The fuel cell power supply comprises a shell, a fuel cell stack, a storage battery, a DC / DC converter and a system controller; a first partition plate is arranged in the shell, and the inside of the shell is divided into a first accommodating space and a second accommodating space arranged along a vertical direction by the first partition plate; the fuel cell stack is arranged in the lower first accommodating space; the storage battery, the DC / DC converter and the system controller are all arranged in the second accommodating space; an air inlet part and an air outlet part are arranged on the shell, and the air inlet part is communicated with the first accommodating space; the fuel cell power supply further comprises a fan and an air duct; the air duct is arranged on the side of the fuel cell stack close to the air outlet part; the air inlet end of the air duct is connected with the fuel cell stack; the air outlet end of the air duct is connected with the shell and communicated with the air outlet part; and the fan is arranged in the air duct. The fuel cell power supply can ensure the safety and reliability of the device and prevent the device from toppling over.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of fuel cell technology, and more particularly, to a fuel cell power supply and a power supply power system. BACKGROUND

[0002] Proton exchange membrane fuel cell (PEMFC) is a kind of "chemical power generation" device that can directly convert chemical energy in raw materials into electrical energy. Its energy conversion efficiency is not limited by Carnot cycle, and the power generation efficiency of the battery pack can be more than 50%. It has the advantages of high energy conversion rate, environmental friendliness, low operating temperature, etc. It is a clean energy technology with great development prospects. At the same time, the PEMFC system has the characteristics of environmental friendliness, excellent starting characteristics, high energy conversion efficiency, stable operation, and no noise, and is expected to be applied in many fields. At present, fuel cell backup power as a new energy has been widely recognized and promoted abroad, and the related technical field in China is in the initial stage. Fuel cell backup power will be widely used.

[0003] In the existing fuel cell backup power, the heat generated after the reaction of the fuel cell stack is discharged to the air through the air outlet on the shell. There is no air duct between the shell and the fuel cell stack. On the one hand, the discharged hot air will form an internal circulation in the shell, and the heat dissipation effect of the equipment is poor, which will affect the work. On the other hand, there will be a small amount of leakage in the fuel cell stack. If the leaked hydrogen gas is retained in the equipment, it will cause safety hazards. SUMMARY

[0004] The first object of the present application is to provide a fuel cell power supply that can ensure the safety and reliability of the device while preventing the device from toppling over.

[0005] The second object of the present application is to provide a roller having the above-mentioned fuel cell power supply.

[0006] The third object of the present application is to provide a process cartridge having the above-mentioned roller.

[0007] The fourth object of the present application is to provide an installation method of the above-mentioned process cartridge.

[0008] To achieve the above first object, the application provides a fuel cell power supply, comprising a shell, a fuel cell stack, a storage battery, a DC / DC converter and a system controller; the DC / DC converter and the system controller are electrically connected with the storage battery; the shell is provided with a first partition plate, and the inside of the shell is divided into a first accommodating space and a second accommodating space arranged along a vertical direction by the first partition plate, and the second accommodating space is located above the first accommodating space; the fuel cell stack is arranged in the first accommodating space, and the storage battery, the DC / DC converter and the system controller are arranged in the second accommodating space; the shell is provided with an air inlet part and an air outlet part, and the air inlet part is communicated with the first accommodating space; the fuel cell power supply further comprises a fan and an air duct; the air duct is arranged at one side of the fuel cell stack close to the air outlet part, the air inlet end of the air duct is connected with the fuel cell stack, the air outlet end of the air duct is connected with the shell and communicated with the air outlet part, and the fan is located in the air duct.

[0009] As can be seen from the above scheme, since the fuel cell stack is heavy, placing it at the lower part of the device can make the center of gravity of the device lower, so that the device is more stable and less likely to fall. In addition, the anode gas of the fuel cell stack is usually hydrogen, which is easy to leak in the process of working of the fuel cell stack due to its own characteristics. Since the storage battery and the DC / DC converter and other strong electrical components are located above the fuel cell stack, the leakage of hydrogen will cause safety problems when the hydrogen concentration in the device reaches a certain level. However, the application sets the air duct on the air outlet side of the fuel cell stack, and the fan is used for heat dissipation of the fuel cell stack, and at the same time, the air in the shell is discharged outward through the air duct, so as to continuously dilute the concentration of hydrogen in the device, prevent the leaked hydrogen from remaining in the device, and ensure the safety and reliability of the device. In addition, the fuel cell stack is located at the lowermost layer, and the strong electrical components are located above the fuel cell stack, which effectively prevents the water generated by the fuel cell stack from contacting the strong electrical components, and no additional isolation protection device is needed. At the same time, the overall structure of the fuel cell power supply is compact, the size is small, and the fuel cell power supply is easy to move.

[0010] A preferred scheme is that the air inlet part and the air outlet part are arranged opposite to the fuel cell stack in the horizontal direction.

[0011] As can be seen above, the air inlet part and the air outlet part are arranged opposite to the fuel cell stack, which can reduce the air flow path, improve the replacement speed of the air in the device, and at the same time improve the heat dissipation efficiency.

[0012] A preferred scheme is that the air inlet side of the fuel cell stack is provided with a filter, and the fuel cell stack is provided with a cathode flow channel, and the air enters the cathode flow channel after being purified by the filter.

[0013] As can be seen, the filter is arranged to facilitate the purified air to enter the cathode flow channel for reflection.

[0014] Further, the air inlet side of the filter is provided with a heater.

[0015] In one preferred embodiment, the fuel cell power supply further comprises a power distribution unit, which is electrically connected to the battery.

[0016] Further, the housing is further provided with a second partition plate, which separates the second accommodating space into a PDU accommodating chamber and a battery accommodating chamber arranged in a vertical direction; the power distribution unit is located in the PDU accommodating chamber and is mounted on the second partition plate, and the battery, the DC / DC converter and the system controller are all located in the battery accommodating chamber and are all mounted on the first partition plate.

[0017] Therefore, the first partition plate and the second partition plate provide support for the devices, so that no other mounting bracket needs to be arranged in the housing, thereby simplifying the structure of the device, making the layout between the components of the device more compact, and realizing the miniaturization of the device.

[0018] Further, the housing is further provided with a third partition plate, which separates the battery accommodating chamber into a weak electric area and a strong electric area arranged in a horizontal direction; the battery and the DC / DC converter are both located in the strong electric area, and the system controller is located in the weak electric area.

[0019] Further, in the horizontal direction, the system controller and the power distribution unit are located on opposite sides of the third partition plate.

[0020] Therefore, the third partition plate separates the weak electric devices from the strong electric devices, further ensuring electrical safety.

[0021] In one preferred embodiment, the bottom of the DC / DC converter is provided with a heat sink, which penetrates through the first partition plate and extends into the first accommodating space.

[0022] Therefore, the arrangement of the heat sink not only allows the DC / DC converter to dissipate heat, but also allows the waste heat generated during the operation of the fuel cell stack to dissipate heat.

[0023] Further, the heat sink is located between the air inlet portion and the fuel cell stack.

[0024] Therefore, on the one hand, the air entering from the air inlet portion can directly blow against the heat sink, thereby rapidly cooling the heat sink, and on the other hand, the heat sink is close to the air inlet of the air duct, so that hot air can be discharged to the outside of the device more quickly, further improving the cooling efficiency.

[0025] In one preferred embodiment, the fuel cell power supply further comprises a fuel cell controller, which is located in the first accommodating space and is mounted on the first partition plate, and the fuel cell controller is located between the air outlet portion and the fuel cell stack.

[0026] Therefore, the layout of each device is reasonable and compact, and further miniaturization is achieved.

[0027] One preferred scheme is that the bottom of the shell is provided with casters, and the number of the casters is more than three.

[0028] Therefore, the fuel cell power supply can be moved conveniently, so that the user can move the fuel cell power supply as needed.

[0029] One preferred scheme is that the shell is further provided with an access hole, and a cover plate is detachably installed on the access hole.

[0030] Therefore, the system controller can be maintained conveniently through the access hole.

[0031] To achieve the above-mentioned second object, the application provides a power supply power system, which comprises a load and the fuel cell power supply. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a system block diagram of an embodiment of the power supply power system of the application.

[0033] Figure 2 is a perspective view of an embodiment of the fuel cell power supply of the application.

[0034] Figure 3 is a perspective view of the first visual angle of an embodiment of the fuel cell power supply of the application hidden by the shell.

[0035] Figure 4 is a perspective view of the second visual angle of an embodiment of the fuel cell power supply of the application hidden by the shell.

[0036] Figure 5 is a left view of an embodiment of the fuel cell power supply of the application hidden by the shell.

[0037] Figure 6 is a rear view of an embodiment of the fuel cell power supply of the application hidden by the shell.

[0038] Figure 7 is a sectional view of an embodiment of the fuel cell power supply of the application.

[0039] The application will be further described below in combination with the drawings and embodiments. DETAILED DESCRIPTION

[0040] Referring to Figure 1 , the power supply power system comprises a load 11, an inverter 12 and a fuel cell power supply 13, and the fuel cell power supply 13 supplies power to the load 11 through the inverter 12.

[0041] Referring to Figures 2 to 7The fuel cell power supply 13 comprises a housing 2, a fuel cell stack 3, a storage battery 4, a DC / DC converter 5, a system controller 6, a filter 71, a heater 72, a power distribution unit 8 (PDU), a fuel cell controller 30, a fan 91 and an air duct 92.

[0042] The power distribution unit 8, the DC / DC converter 5, the system controller 6, the heater 72, the fuel cell controller 30 and the fan 91 are all electrically connected with the storage battery 4. The heater 72 is a PTC heater.

[0043] The housing 2 is in the shape of a cuboid, the bottom of the housing 2 is provided with four casters 20, the casters 20 are universal casters with brake function, the front wall of the housing 2 is provided with mechanical control buttons 28 or a touch screen, the front wall of the housing 2 is provided with an air inlet portion 21 below the mechanical control buttons 28 or the touch screen, the rear wall of the housing 2 is provided with an air outlet portion 22, and the air inlet portion 21 and the air outlet portion 22 are both in the shape of a grid.

[0044] The housing 2 is provided with a first partition plate 23 and a second partition plate 24, the inside of the housing 2 is divided by the first partition plate 23 into a first containing space 201 and a second containing space 202 arranged along the vertical direction, and the second containing space 202 is located above the first containing space 201. The fuel cell stack 3 is arranged in the first containing space 201 and is mounted on the bottom wall of the housing 2. The second partition plate 24 divides the second containing space 202 into a PDU containing chamber 222 and a storage battery containing chamber 221 arranged along the vertical direction, the power distribution unit 8 is located in the PDU containing chamber 222 and is mounted on the second partition plate 24, and the storage battery 4, the DC / DC converter 5 and the system controller 6 are all arranged in the storage battery containing chamber 221 and are all mounted on the first partition plate 23.

[0045] The air inlet portion 21 communicates with the first containing space 201, and the air inlet portion 21 and the air outlet portion 22 are both arranged opposite to the fuel cell stack 3 in the horizontal direction. The air duct 92 is arranged at the side of the fuel cell stack 3 close to the air outlet portion 22, the air inlet end of the air duct 92 is connected with the fuel cell stack 3, the air outlet end of the air duct 92 is connected with the housing 2 and communicates with the air outlet portion 22, and the number of the fan 91 is two, and the two fans 91 are both located in the air duct 92 and are arranged along the horizontal direction.

[0046] The filter 71 is arranged at the air inlet side of the fuel cell stack 3, and the heater 72 is arranged at the air inlet side of the filter 71, the fuel cell stack 3 is provided with a cathode flow channel and an anode flow channel, cathode gas air enters the cathode flow channel through the filter 71, and the fuel cell stack 3 is further connected with an air inlet pipeline and an air outlet pipeline, the air inlet pipeline is provided with an air inlet pressure reducing valve 31, anode gas hydrogen enters the anode flow channel through the air inlet pressure reducing valve 31, the air outlet pipeline is provided with an air outlet valve 32, and unreacted hydrogen and air are discharged through the air outlet valve 32.

[0047] The third partition plate 25 is further arranged in the shell 2, and the battery accommodating chamber 221 is divided into a weak current area 2211 and a strong current area 2212 arranged in a horizontal direction by the third partition plate 25. The battery 4 and the DC / DC converter 5 are located in the strong current area, and the system controller 6 is located in the weak current area. In the horizontal direction, the system controller 6 and the power distribution unit 8 are located on opposite sides of the third partition plate 25, respectively. The shell 2 is further provided with an access hole 26, and a cover plate 261 is detachably installed on the access hole 26. The access hole 26 is arranged opposite to the system controller 6, so as to facilitate maintenance of the system controller 6.

[0048] The bottom of the DC / DC converter 5 is provided with a heat sink 51, the heat sink 51 penetrates through the first partition plate 23 and extends into the first accommodating space 201, and the heat sink 51 is located between the air inlet portion 21 and the fuel cell stack 3. The fuel cell controller 30 is located in the first accommodating space 201 and is installed on the first partition plate 23, and the fuel cell controller 30 is located between the air outlet portion 22 and the fuel cell stack 3.

[0049] When the fuel cell power supply 13 works in a normal scene, the fan 91 first starts to suck air. The oxidizing medium air enters the first accommodating space 201 through the air inlet portion 21, and then enters the cathode flow channel of the fuel cell stack 3 in sequence through the heater 72 and the filter 71. At the same time, the inlet gas pressure reducing valve 31 is opened, the reaction medium hydrogen enters the anode flow channel of the fuel cell stack 3, the anode gas and the cathode gas react chemically in the fuel cell stack 3 to generate heat, water and electricity. Among them, the electricity charges the battery 4 through the DC / DC converter 5, and then supplies power to the load 11 through the inverter 12. The product water is discharged from the system together with the unreacted air and hydrogen through the exhaust valve 32. After the fuel cell power supply 13 is started by the battery 4, the fuel cell power supply 13 becomes the only power source of the system, and provides power for each part and the load 11.

[0050] When the fuel cell power supply 13 works in a low-temperature scene, the PTC heater 72 is preferably started by the battery 4, and when the temperature rises to meet the working requirements of the fuel cell stack 3, the normal stack starting process is performed. During the working process of the fuel cell power supply 13, the detection system of the fuel cell power supply 13, such as the fuel cell controller 30, continuously monitors whether the fuel cell operating state is safe, and the hydrogen content in the hydrogen alarm monitoring system.

[0051] From the above, since the fuel cell stack has a large weight, placing the fuel cell stack under the device can make the center of gravity of the device as a whole lower, more stable, and less likely to tip over. In addition, the anode gas of the fuel cell stack is usually hydrogen, which is easy to leak in small amounts during the operation of the fuel cell stack due to its own characteristics. Since the strong electrical components such as the battery and the DC / DC converter are located above the fuel cell stack, the leakage of hydrogen can cause safety problems when the hydrogen concentration in the device reaches a certain level. The present application sets an air duct on the air outlet side of the fuel cell stack, and the fan cools the fuel cell stack while expelling the air in the housing through the air duct, thereby continuously diluting the concentration of hydrogen in the device, preventing the leakage of hydrogen from accumulating in the device, and ensuring the safety and reliability of the device. In addition, the fuel cell stack is located at the lowermost layer, and the strong electrical components are located above the fuel cell stack, effectively preventing the water produced by the fuel cell stack from coming into contact with the strong electrical components, and eliminating the need for additional isolation protection devices. At the same time, the frame formed by the housing and the partitions can provide a mounting base for each component in the fuel cell power supply, eliminating the need for additional mounting brackets, which can effectively simplify the structure of the fuel cell power supply, reduce the number of components, and thus reduce the overall size of the fuel cell backup.

[0052] In addition, the number of casters can be more than three, and the specific number can be changed as needed. The fuel cell power supply can also include a hydrogen tank for providing hydrogen to the fuel cell power supply. The fuel cell power supply can also include a collection device for collecting unreacted hydrogen and air. The number of fans can also be changed as needed. The fuel cell power supply can also directly supply power to the load, and the need to connect an inverter is determined according to whether the working current of the load is direct current or alternating current. The electrical energy generated by the fuel cell stack can also be directly supplied to the load after being converted by the DC / DC converter or through the inverter, i.e. without charging the battery. The above changes can also achieve the purpose of the present application.

[0053] Finally, it should be emphasized that the above is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various changes and modifications, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A fuel cell power supply comprising a housing, a fuel cell stack, a battery, a DC / DC converter and a system controller; the DC / DC converter and the system controller are electrically connected with the battery; the housing is provided with a first partition plate, and the housing is divided into a first accommodating space and a second accommodating space arranged along a vertical direction by the first partition plate, and the second accommodating space is located above the first accommodating space; the fuel cell stack is arranged in the first accommodating space, and the battery, the DC / DC converter and the system controller are arranged in the second accommodating space; the housing is provided with an air inlet portion and an air outlet portion, and the air inlet portion communicates with the first accommodating space; characterized in that: the fuel cell power supply further comprises a fan and an air duct; the air duct is arranged on a side of the fuel cell stack close to the air outlet portion, an air inlet end of the air duct is connected with the fuel cell stack, an air outlet end of the air duct is connected with the housing and communicates with the air outlet portion, and the fan is located in the air duct; a radiator is arranged at a bottom of the DC / DC converter for dissipating waste heat generated during operation of the DC / DC converter and the fuel cell stack, the radiator penetrates through the first partition plate and extends into the first accommodating space, and the radiator is located between the air inlet portion and the fuel cell stack. 2.The fuel cell power supply according to claim 1, characterized in that: the air inlet portion and the air outlet portion are arranged opposite to the fuel cell stack in a horizontal direction. 3.The fuel cell power supply according to claim 1, characterized in that: a filter is arranged on an air inlet side of the fuel cell stack, a cathode flow channel is arranged in the fuel cell stack, and air enters the cathode flow channel through the filter. 4.The fuel cell power supply according to claim 3, characterized in that: a heater is arranged on an air inlet side of the filter. 5.The fuel cell power supply according to any one of claims 1 to 4, characterized in that: the fuel cell power supply further comprises a power distribution unit, and the power distribution unit is electrically connected with the battery. 6.The fuel cell power supply according to claim 5, characterized in that: a second partition plate is further arranged in the housing, and the second partition plate divides the second accommodating space into a PDU accommodating chamber and a battery accommodating chamber arranged along a vertical direction; the power distribution unit is located in the PDU accommodating chamber, and the battery, the DC / DC converter and the system controller are located in the battery accommodating chamber. 7.The fuel cell power supply according to claim 6, characterized in that: a third partition plate is further arranged in the housing, and the third partition plate divides the battery accommodating chamber into a weak electric area and a strong electric area arranged along a horizontal direction; the battery and the DC / DC converter are located in the strong electric area, and the system controller is located in the weak electric area. 8.The fuel cell power supply according to claim 7, characterized in that: In the horizontal direction, the system controller and the power distribution unit are respectively located on opposite sides of the third partition.

9. The fuel cell power supply according to any one of claims 1 to 4, characterized in that: The fuel cell power supply further comprises a fuel cell controller, the fuel cell controller is located in the first accommodating space, and the fuel cell controller is located between the air outlet and the fuel cell stack.

10. The fuel cell power supply according to any one of claims 1 to 4, characterized in that: The bottom of the shell is provided with casters, and the number of casters is three or more.

11. The fuel cell power supply according to any one of claims 1 to 4, characterized in that: The shell is further provided with an access hole, a cover plate is detachably mounted on the access hole, and the access hole is located opposite the system controller.

12. A powertrain system characterized by, A load and the fuel cell power supply according to any one of claims 1 to 11 are included, and the fuel cell power supply supplies power to the load.

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