Fuel cell and vehicle including the same

Abstract

The utility model discloses a fuel cell and a vehicle comprising the same. The fuel cell provided by the embodiment of the utility model comprises a mounting seat, the first electric pile is mounted at a first position of the mounting seat; the second electric pile is mounted at a second position of the mounting seat, and the first electric pile and the second electric pile are connected in series; and the first electric pile and the second electric pile are respectively connected to the same gas supply device. According to the fuel cell and the vehicle comprising the same disclosed by the embodiment of the utility model, high-power output is ensured, the complexity of the device is simplified, and the operation and maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cells, in particular to a fuel cell and a vehicle comprising the fuel cell. Background Art

[0002] In order to achieve sustainable development of human society, it has become a consensus among countries around the world to transform from non-renewable energy to green energy such as wind energy, hydropower, solar energy, biomass energy, geothermal energy, and ocean energy. However, due to the inherent intermittent, random and volatile nature of most renewable energy, the collected renewable energy cannot be directly equated with the energy that can be conveniently used.

[0003] Hydrogen energy is a recognized clean energy. It converts wind energy, solar energy, and hydropower into storable, flexible, and convenient green hydrogen, thereby promoting the transformation from traditional fossil energy to green and clean energy. Hydrogen energy has many advantages. First, it has a high energy density. The calorific value of hydrogen is about three times that of oil. Second, it is zero pollution. The only product is water, which can be decomposed again to produce hydrogen, thus achieving a closed loop. As an "electricity substitute", the scope of hydrogen energy application can cover transportation power, industrial production, energy transfer, grid energy storage and allocation, etc., making the hydrogen energy industry expected to become a pillar industry for energy transformation. Therefore, hydrogen energy is regarded as a disruptive technology direction for the future energy revolution.

[0004] In the prior art, hydrogen fuel cells are power generation devices that use hydrogen as fuel and directly convert the chemical energy in the fuel into electrical energy through electrochemical reactions. They are also a key node in the field of hydrogen energy. Existing fuel cells are difficult to balance output power and structural simplicity.

[0005] Therefore, it is hoped that there will be a new fuel cell and a vehicle including the same that can overcome the above problems. Utility Model Content

[0006] In view of the above problems, the purpose of the present utility model is to provide a fuel cell and a vehicle including the same, particularly a solution of connecting multiple short battery stacks in series, so as to simplify the complexity of the device and reduce the operation and maintenance costs while ensuring high power output.

[0007] According to one aspect of the present invention, a fuel cell is provided, comprising:

[0008] Mounting seat;

[0009] A first battery stack, the first battery stack being mounted at a first position of the mounting base; and

[0010] a second battery stack, the second battery stack being mounted at a second position of the mounting base,

[0011] Wherein, the first battery stack and the second battery stack are connected in series;

[0012] The first fuel cell stack and the second fuel cell stack are respectively connected to the same gas supply device.

[0013] Optionally, the output voltage of the first battery stack and / or the second battery stack is less than or equal to 250 volts;

[0014] The first battery stack includes a plurality of first single cells stacked in sequence, and the number of the first single cells is less than or equal to 500; and / or

[0015] The second battery stack includes a plurality of second single cells stacked in sequence, and the number of the second single cells is less than or equal to 500.

[0016] Optionally, the first battery stack and / or the second battery stack is an air-cooled battery stack; the output voltage of the first battery stack and / or the second battery stack is less than or equal to 100 volts;

[0017] The number of the first single cells is less than or equal to 200;

[0018] The number of the second single cells is less than or equal to 200.

[0019] Optionally, the first fuel cell stack and the second fuel cell stack are liquid-cooled fuel cell stacks; the first fuel cell stack and the second fuel cell stack are respectively connected to the same liquid cooling device.

[0020] Optionally, the fuel cell is a proton exchange membrane fuel cell; the gas supply device includes a hydrogen supply unit and an oxygen supply unit;

[0021] The first end of the first fuel cell stack and the first end of the second fuel cell stack are respectively connected to the hydrogen supply unit to receive hydrogen;

[0022] The second end of the first fuel cell stack and the second end of the second fuel cell stack are respectively connected to the oxygen supply unit to receive oxygen.

[0023] Optionally, the fuel cell is a liquid-cooled fuel cell; the gas supply device includes a hydrogen supply unit and an oxygen supply unit;

[0024] The air inlet end of the liquid-cooled fuel cell is connected to an air compressor, and the air compressor is also connected to the oxygen supply unit; oxygen enters the air compressor through the air inlet end and is pressurized by the air compressor; the pressurized oxygen enters the oxygen supply unit;

[0025] The oxygen supply unit is connected to the second end of the first battery stack and the second end of the second battery stack, respectively, to provide the pressurized oxygen to the first battery stack and the second battery stack, respectively;

[0026] The hydrogen tank of the liquid-cooled fuel cell is connected to the hydrogen supply unit to provide hydrogen to the hydrogen supply unit;

[0027] The hydrogen supply unit is connected to a first end of the first fuel cell stack and a first end of the second fuel cell stack, respectively, to provide the hydrogen to the first fuel cell stack and the second fuel cell stack, respectively.

[0028] Optionally, the fuel cell is an air-cooled fuel cell; the gas supply device includes a hydrogen supply unit;

[0029] The hydrogen tank of the air-cooled fuel cell is connected to the hydrogen supply unit to provide hydrogen to the hydrogen supply unit;

[0030] The hydrogen supply unit is connected to a first end of the first fuel cell stack and a first end of the second fuel cell stack, respectively, to provide the hydrogen to the first fuel cell stack and the second fuel cell stack, respectively.

[0031] Optionally, the fuel cell further comprises a control unit;

[0032] The control unit is connected to the first battery stack to control the first battery stack to output a first voltage; the control unit is connected to the second battery stack to control the second battery stack to output a second voltage.

[0033] Optionally, the fuel cell further comprises a first fastener and a second fastener; the first fastener and the second fastener are independent of each other;

[0034] The first battery stack includes a plurality of first single cells stacked in sequence; the first fastener is connected to the plurality of first single cells stacked in sequence to fasten the plurality of first single cells;

[0035] The second battery stack includes a plurality of second single cells stacked in sequence; the second fastener is connected to the plurality of second single cells stacked in sequence to fasten the plurality of second single cells.

[0036] According to another aspect of the present invention, a vehicle is provided, comprising:

[0037] Frame; and

[0038] The fuel cell as described above is arranged on the vehicle frame; the fuel cell is used to provide power.

[0039] The fuel cell and the vehicle including the same provided by the embodiment of the utility model have the series-connected fuel cell stacks sharing the same gas supply device, which simplifies the complexity of the device and reduces the operation and maintenance costs while ensuring high power output.

[0040] Furthermore, the series-connected fuel cell stacks share peripheral auxiliary systems such as hydrogen supply units, oxygen supply units and liquid cooling devices, which not only reduce the complexity and maintenance costs of the system, but also improve the utilization efficiency of the peripheral auxiliary systems, reduce the proportion of parasitic power, and thus increase the output power ratio of the fuel cell.

[0041] Furthermore, by connecting short battery stacks in series, the output voltage of the battery stack is increased exponentially, and energy loss is reduced during DC / DC conversion, thereby improving energy utilization.

[0042] Furthermore, the form of connecting multiple short battery stacks in series is conducive to reducing the difficulty of the process, lowering the requirements for component and assembly precision, and is also conducive to improving the consistency, sealing and reliability of the battery stack, thereby gaining greater performance improvement space and reliability; in addition, when maintenance is required, the number of single-chip batteries involved will be smaller, which is conducive to flexibility and cost controllability.

[0043] Furthermore, different battery stacks are fastened using independent fasteners, thus ensuring the stability and earthquake resistance of each battery stack. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The above and other purposes, features and advantages of the present invention will become more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

[0045] Figure 1 A schematic diagram of a fuel cell device according to an embodiment of the utility model is shown;

[0046] Figure 2 A schematic structural diagram of a fuel cell according to Embodiment 1 of the present utility model is shown;

[0047] Figure 3 A schematic structural diagram of a fuel cell according to the second embodiment of the present utility model is shown. DETAILED DESCRIPTION

[0048] Various embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. In each of the accompanying drawings, the same elements are represented by the same or similar reference numerals. For the sake of clarity, the various parts in the accompanying drawings are not drawn to scale. In addition, some well-known parts may not be shown in the drawings.

[0049] The specific implementation of the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. Many specific details of the utility model are described below, such as the structure, material, size, processing technology and technology of the components, so as to more clearly understand the utility model. However, as those skilled in the art can understand, the utility model can be implemented without following these specific details.

[0050] It should be understood that when describing the structure of a component, when a layer or a region is referred to as being "on" or "over" another layer or another region, it may mean that it is directly on the other layer or another region, or that other layers or regions are included between it and the other layer or another region. Moreover, if the component is turned over, the layer or a region will be "below" or "beneath" another layer or another region.

[0051] Figure 1 FIG. 1 shows a schematic diagram of a fuel cell device according to an embodiment of the present utility model. Figure 1 As shown, the fuel cell according to the embodiment of the present invention includes a first fuel cell stack 100 , a second fuel cell stack 200 , a gas supply device 300 and a mounting seat 400 .

[0052] Specifically, the mounting base 400 is used for mounting the fuel cell stack and serves as a housing / base of the fuel cell, for example.

[0053] The first fuel cell stack 100 is mounted at a first position of the mounting base 400 .

[0054] The second battery stack 200 is installed at the second position of the mounting base 400. The first battery stack 100 and the second battery stack 200 are connected in series. Of course, the number of battery stacks according to the embodiment of the utility model is not limited to two. On the basis of the first battery stack 100 and the second battery stack 200, a third battery stack, a fourth battery stack, etc. can also be connected in series.

[0055] The first battery stack 100 and the second battery stack 200 are respectively connected to the same gas supply device 300. Optionally, at least a portion of the gas supply device 300 is disposed on the mounting seat 400. Optionally, the gas supply device 300 is disposed outside the mounting seat 400. The gas supply device 300, for example, includes a hydrogen supply unit and an oxygen supply unit, the hydrogen supply unit is used to provide hydrogen to the first battery stack 100 and the second battery stack 200, and the oxygen supply unit is used to provide oxygen to the first battery stack 100 and the second battery stack 200.

[0056] In an optional embodiment of the utility model, the first battery stack 100 / the second battery stack 200 is a liquid-cooled battery stack or an air-cooled battery stack. The output voltage of the first battery stack 100 is less than or equal to 250 volts; the first battery stack 100 includes a plurality of first single cells stacked in sequence, and the number of the first single cells is less than or equal to 500. The output voltage of the second battery stack 200 is less than or equal to 250 volts; the second battery stack 200 includes a plurality of second single cells stacked in sequence, and the number of the second single cells is less than or equal to 500. Optionally, the first battery stack 100 / the second battery stack 200 is an air-cooled battery stack. The output voltage of the first battery stack 100 is less than or equal to 100 volts, and the number of the first single cells is less than or equal to 200. The output voltage of the second battery stack 200 is less than or equal to 100 volts, and the number of the second single cells is less than or equal to 200. Of course, the power, voltage, number of single cells, etc. of the battery stack can also be set according to actual needs.

[0057] Furthermore, the inventor found that the proton exchange membrane fuel cell (PEMFC) stack is composed of multiple single cells stacked in series, so the more single cells there are, the higher the overall voltage of the stack and the greater the output power. But the reality is that the number of single cells that can be stacked in a single cell stack that can operate effectively and safely is limited by many factors. The main challenges are the uniformity of reactant distribution and the uniformity of the force on the single cells, which will lead to poor consistency of the single cells, which is a big problem for the operation of the stack. The severity will destroy the single cell and then the entire stack cannot operate normally. In the actual production process, due to the limitation of process precision, the thickness of the main accessories of the fuel cell stack, such as the bipolar plate, gas diffusion layer and other components, cannot be guaranteed to be completely consistent, and can only be controlled within a certain range, and the gas diffusion layer will be compressed by force, resulting in changes in thickness. The slight size differences of the single cells will accumulate to the overall level. The more the number of fuel cell stacks, the greater the impact of the differences in components on the overall, resulting in a series of problems such as uneven force and poor airtightness. The stack is generally fastened with bolts, and the tightening force needs to be controlled within a certain range. However, under the same tightening pressure conditions, the more single-cell cells in the fuel cell stack, the greater the probability that the fuel cell will loosen under vibration (such as car driving conditions) and cause the sealing to deteriorate. Another problem is the heat dissipation of the stack itself, especially for air-cooled stacks. A fuel cell is a chemical device that directly converts the chemical energy of a fuel into electrical energy. It is indeed not limited by the Carnot cycle effect, and the energy conversion efficiency is indeed higher than that of a traditional internal combustion engine. However, due to various factors, the actual energy conversion efficiency of hydrogen fuel cells in actual operation is mostly in the range of 45% to 60%, which means that about half of the energy will be dissipated as heat. Even for a water-cooled stack, a single cell stack has hundreds of single-cell cells stacked and pressed together, and heat dissipation is a big challenge. If the heat dissipation is not good, it will cause damage to the membrane electrode in severe cases, and the fuel cell cannot work properly. In addition, the thermal stability of the proton exchange membrane material itself at high temperatures, the corrosion and thermal expansion of the metal parts of the battery may cause serious problems. Due to the limitation of its heat dissipation efficiency, the number of single-cell batteries that can be stacked is usually much less than that of a water-cooled battery stack.

[0058] In short, to increase the power of a single fuel cell stack, it is not enough to simply increase the number of stacked cells. As the number of stacked cells increases, the difficulty of stacking increases significantly, involving technical advances in assembly process, material performance, stack structure design, etc. The above problems need to be solved urgently.

[0059] Figure 2 FIG. 1 shows a schematic diagram of the structure of a fuel cell according to Embodiment 1 of the present utility model. Figure 2As shown, the fuel cell according to the first embodiment of the present invention includes a first fuel cell stack 100, a second fuel cell stack 200, a gas supply device, a control unit 500 and a liquid cooling device 600. The gas supply device includes a hydrogen supply unit and an oxygen (air) supply unit.

[0060] The fuel cell is, for example, a proton exchange membrane fuel cell. The first end of the first stack 100 and the first end of the second stack 200 are respectively connected to a hydrogen supply unit to receive hydrogen. The second end of the first stack 100 and the second end of the second stack 200 are respectively connected to an oxygen supply unit to receive oxygen.

[0061] The air inlet end of the fuel cell is connected to an air compressor. The air compressor is also connected to an oxygen supply unit. Oxygen enters the air compressor via the air inlet end and is pressurized by the air compressor. The pressurized oxygen enters the oxygen supply unit. The oxygen supply unit is respectively connected to the second end of the first battery stack 100 and the second end of the second battery stack 200 to provide pressurized oxygen to the first battery stack 100 and the second battery stack 200, respectively.

[0062] The hydrogen tank of the fuel cell is connected to the hydrogen supply unit to supply hydrogen to the hydrogen supply unit. The hydrogen supply unit is connected to the first end of the first stack 100 and the first end of the second stack 200 to supply hydrogen to the first stack 100 and the second stack 200 respectively.

[0063] Specifically, the filter is connected to the first end of the air compressor, the second end of the air compressor is connected to the first end of the oxygen supply unit, and the second end of the oxygen supply unit is connected to the first battery stack 100 and the second battery stack 200 via an auxiliary system. The auxiliary system may include an air flow distribution structure, etc. Air (oxygen) is sequentially provided to the first battery stack 100 and the second battery stack 200 via the filter, the air compressor, and the oxygen supply unit.

[0064] The high-pressure hydrogen tank is connected to a first end of the hydrogen supply unit, and a second end of the hydrogen supply unit is connected to the first fuel cell stack 100 and the second fuel cell stack 200. The hydrogen in the high-pressure hydrogen tank is provided to the first fuel cell stack 100 and the second fuel cell stack 200 via the hydrogen supply unit.

[0065] Optionally, the fuel cell is a liquid-cooled fuel cell. The first fuel cell stack 100 and the second fuel cell stack 200 are liquid-cooled fuel cells. The first fuel cell stack 100 and the second fuel cell stack 200 are respectively connected to the same liquid cooling device 600.

[0066] Optionally, the fuel cell further includes a (energy) control unit 500. The control unit (DC-DC) 500 is connected to the first stack 100 to control the first stack 100 to output a first voltage. The control unit 500 is connected to the second stack 200 to control the second stack 200 to output a second voltage.

[0067] Figure 3 FIG. 2 shows a schematic diagram of the structure of a fuel cell according to the second embodiment of the present utility model. Figure 3 As shown, the fuel cell according to the second embodiment of the utility model is an air-cooled fuel cell, which includes a first stack 100, a second stack 200, a high-pressure hydrogen tank, a hydrogen supply unit, a control unit 500 and an air-cooling device 700. The air-cooling device 700 is, for example, a fan for providing wind. Of course, the air-cooling device 700 can be cancelled and natural wind can be used for cooling instead.

[0068] Specifically, the gas supply device includes a hydrogen supply unit. A hydrogen tank of the air-cooled fuel cell is connected to the hydrogen supply unit to supply hydrogen to the hydrogen supply unit.

[0069] The hydrogen supply unit is connected to a first end of the first fuel cell stack 100 and a first end of the second fuel cell stack 200 , respectively, to provide hydrogen to the first fuel cell stack 100 and the second fuel cell stack 200 , respectively.

[0070] In an optional embodiment of the utility model, the fuel cell (whether liquid-cooled, air-cooled or other types) also includes a first fastener and a second fastener. The first fastener and the second fastener are independent of each other and are not directly connected. The first battery stack 100 includes a plurality of first single cells stacked in sequence. The first fastener is connected to a plurality of first single cells stacked in sequence to fasten the plurality of first single cells. The second battery stack 200 includes a plurality of second single cells stacked in sequence. The second fastener is connected to a plurality of second single cells stacked in sequence to fasten the plurality of second single cells.

[0071] Specifically, the core of the fuel cell is the stack. A single stack (the first stack or the second stack) is composed of multiple single cells stacked in series, that is, the bipolar plates and membrane electrodes are alternately stacked, and seals are embedded between each cell. After the front and rear plates are pressed, they are fastened with screws to form a fuel cell stack. When the stack is working, hydrogen and air (the reactant is oxygen) are introduced from the inlet respectively, distributed to the bipolar plates of each single cell through the main gas channel of the stack, and evenly distributed to the electrodes through the bipolar plate guide, and contact with the catalyst for electrochemical reaction to generate electricity. The water generated by the reaction and the unreacted gas are discharged through the bipolar plate guide, and the excess heat generated by the reaction is taken away by the coolant.

[0072] In an embodiment of the present application, the first battery stack and / or the second battery stack is a PEMFC short stack (PEMFC shortstack), that is, a battery stack with layer number and voltage restrictions as described above. Stacking a relatively small number of monolithic cells to form a so-called "short battery stack", or "short stack", will help reduce the process difficulty, reduce the requirements for component and assembly precision, and also help improve the consistency, sealing and reliability of the battery stack, thereby gaining greater performance improvement space and reliability. In addition, when maintenance is required, the number of monolithic cells involved will be smaller, which is conducive to flexibility and cost controllability. Furthermore, the short battery stack is connected in series, and the auxiliary system is designed to be in parallel as much as possible. While achieving high power output, it greatly simplifies the system complexity and reduces the operation and maintenance costs. In addition, by connecting the short battery stack in series, the output voltage of the battery stack is doubled. When performing DC / DC conversion, the energy loss is small and the energy efficiency will be improved.

[0073] According to another aspect of the present invention, a vehicle is provided. The vehicle comprises a frame and a fuel cell as described above. The fuel cell is arranged on the frame and is used to provide power (for driving the vehicle).

[0074] Taking the application in new energy vehicles as an example, in a specific application scenario, the output power of the water-cooled PEMFC system actually comes from the stack. Excluding the air compressor, hydrogen circulation pump and other components in the gas supply system, and the parasitic power consumed by the cooling module, the surplus is the net output power of the system. The solution of this application connects several short stacks of the water-cooled PEMFC system in series circuit. Although the voltage of each short stack does not exceed 250 volts, several series connections can double the total output power of the entire integrated system. Several short stacks share peripheral auxiliary systems. This method can reduce the complexity and maintenance costs of the system, and may improve the utilization efficiency of the peripheral auxiliary system and reduce the proportion of parasitic power. The fuel cell according to the embodiment of the utility model can output sufficiently large power and sufficiently high voltage, which is more suitable for hydrogen vehicles (400 volts), heavy trucks (750 volts), or for power generation and other application scenarios.

[0075] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0076] The embodiments of the present invention are described above, and these embodiments do not describe all the details in detail, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and changes can be made based on the above description. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can make good use of the present invention and the modifications based on the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A fuel cell, characterized in that: include: Mounting seat; a first battery stack, the first battery stack being mounted at a first position of the mounting base; as well as a second battery stack, the second battery stack being mounted at a second position of the mounting base, Wherein, the first battery stack and the second battery stack are connected in series; The first fuel cell stack and the second fuel cell stack are respectively connected to the same gas supply device.

2. The fuel cell according to claim 1, wherein The output voltage of the first battery stack and / or the second battery stack is less than or equal to 250 volts; The first battery stack includes a plurality of first single cells stacked in sequence, and the number of the first single cells is less than or equal to 500; and / or The second battery stack includes a plurality of second single cells stacked in sequence, and the number of the second single cells is less than or equal to 500.

3. The fuel cell according to claim 2, wherein: The first battery stack and / or the second battery stack are air-cooled battery stacks; the output voltage of the first battery stack and / or the second battery stack is less than or equal to 100 volts; The number of the first single cells is less than or equal to 200; The number of the second single cells is less than or equal to 200.

4. The fuel cell according to claim 1, wherein The first fuel cell stack and the second fuel cell stack are liquid-cooled fuel cells; the first fuel cell stack and the second fuel cell stack are respectively connected to the same liquid cooling device.

5. The fuel cell according to claim 1, wherein The fuel cell is a proton exchange membrane fuel cell; the gas supply device includes a hydrogen supply unit and an oxygen supply unit; The first end of the first fuel cell stack and the first end of the second fuel cell stack are respectively connected to the hydrogen supply unit to receive hydrogen; The second end of the first fuel cell stack and the second end of the second fuel cell stack are respectively connected to the oxygen supply unit to receive oxygen.

6. The fuel cell according to claim 1, wherein The fuel cell is a liquid-cooled fuel cell; the gas supply device includes a hydrogen supply unit and an oxygen supply unit; The air inlet end of the liquid-cooled fuel cell is connected to an air compressor, and the air compressor is also connected to the oxygen supply unit; oxygen enters the air compressor through the air inlet end and is pressurized by the air compressor; the pressurized oxygen enters the oxygen supply unit; The oxygen supply unit is connected to the second end of the first battery stack and the second end of the second battery stack, respectively, to provide the pressurized oxygen to the first battery stack and the second battery stack, respectively; The hydrogen tank of the liquid-cooled fuel cell is connected to the hydrogen supply unit to provide hydrogen to the hydrogen supply unit; The hydrogen supply unit is connected to a first end of the first fuel cell stack and a first end of the second fuel cell stack, respectively, to provide the hydrogen to the first fuel cell stack and the second fuel cell stack, respectively.

7. The fuel cell according to claim 1, wherein The fuel cell is an air-cooled fuel cell; the gas supply device includes a hydrogen supply unit; The hydrogen tank of the air-cooled fuel cell is connected to the hydrogen supply unit to provide hydrogen to the hydrogen supply unit; The hydrogen supply unit is connected to a first end of the first fuel cell stack and a first end of the second fuel cell stack, respectively, to provide the hydrogen to the first fuel cell stack and the second fuel cell stack, respectively.

8. The fuel cell according to claim 1, wherein The fuel cell also includes a control unit; The control unit is connected to the first battery stack to control the first battery stack to output a first voltage; the control unit is connected to the second battery stack to control the second battery stack to output a second voltage.

9. The fuel cell according to claim 1, wherein: The fuel cell further comprises a first fastener and a second fastener; the first fastener and the second fastener are independent of each other; The first battery stack includes a plurality of first single cells stacked in sequence; The first fastener is connected to the plurality of first single cells stacked in sequence to fasten the plurality of first single cells; The second battery stack includes a plurality of second single cells stacked in sequence; The second fastener is connected to the plurality of second unit batteries stacked in sequence to fasten the plurality of second unit batteries.

10. A vehicle, characterized in that: include: Frame; as well as The fuel cell according to any one of claims 1 to 9, wherein the fuel cell is disposed on the vehicle frame; and the fuel cell is used to provide power.

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