Bidirectional temperature control heat transfer method and device for industrial-grade fuel cell

Abstract

The invention provides an industrial-grade fuel cell bidirectional temperature control heat transfer method and device, the industrial-grade fuel cell is a bipolar plate fuel cell, and the method comprises the following steps: when a bipolar plate fuel cell stack needs to be cooled, a fluid working medium in a low-temperature energy storage tank is used for absorbing heat in the bipolar plate fuel cell; the heated fluid working medium transfers heat to the high-temperature energy storage tank for storage, and the cooled fluid working medium returns to the low-temperature energy storage tank; when the bipolar plate fuel cell needs to be heated, the fluid working medium in the low-temperature energy storage tank is used for absorbing heat in the high-temperature energy storage tank, the heated fluid working medium transmits the heat to the bipolar plate fuel cell to add powder into the bipolar plate fuel cell, and the cooled fluid working medium returns to the low-temperature energy storage tank; excess heat is instantly absorbed under the high-heat-yield working condition, reverse heat supply is conducted in the cold start or low-temperature environment, the service life of the battery is prolonged, and an auxiliary heater and a matched electric power system thereof are omitted.

Description

Technical Field

[0001] The present invention belongs to the technical field of fuel cell energy management, and specifically relates to a two-way temperature control and heat transfer method and device for an industrial-grade fuel cell. Background Art

[0002] In the actual operation of industrial-grade fuel cells, the effectiveness of temperature control directly affects the performance, lifespan, and energy conversion efficiency of the fuel cell stack. Traditional temperature control systems usually use independent heating and cooling devices, which results in the inability to recycle the waste heat generated during the cooling process. In addition, additional energy is consumed during heating, resulting in significant energy waste. At the same time, such systems have poor adaptability to complex working conditions and are prone to temperature control lag or overshoot in scenarios such as cold start and severe load fluctuations. In addition, due to structural redundancy, the number of components is large, the cost is high, and the space occupied is large. Therefore, there is an urgent need for a new temperature control structure that can integrate energy circulation, optimize heat transfer efficiency, and realize intelligent working condition switching to meet the needs of industrial-grade fuel cells for efficient and reliable temperature control. Summary of the Invention

[0003] The present invention aims to provide an industrial-grade bidirectional temperature control and heat transfer method and device for fuel cells, addressing the difficulties and complexities of conventional structures in achieving efficient bidirectional temperature control and heat transfer, as discussed in the background art. By utilizing a specialized flow channel design in the bipolar plates and the introduction of a high- and low-temperature energy storage system, a single system can operate in both modes, improving heat transfer efficiency and simplifying the system architecture.

[0004] In order to achieve the above object, the technical solution adopted in the present invention is: In a first aspect, the present invention provides a bidirectional temperature control and heat transfer method for an industrial-grade fuel cell, wherein the industrial-grade fuel cell is a bipolar plate fuel cell, comprising the following steps: When the bipolar fuel cell stack needs to be cooled, the fluid in the low-temperature energy storage tank absorbs the heat in the bipolar fuel cell. The heated fluid transfers the heat to the high-temperature energy storage tank for storage, and the cooled fluid returns to the low-temperature energy storage tank. When the bipolar fuel cell needs to be heated, the fluid working medium in the low-temperature energy storage tank absorbs the heat in the high-temperature energy storage tank. The heated fluid working medium transfers the heat to the bipolar fuel cell to add powder to it, and the cooled fluid working medium returns to the low-temperature energy storage tank.

[0005] This application constructs a closed-loop energy recovery system, which stores the battery waste heat in a high-temperature tank during the cooling phase and releases the stored heat energy during the heating phase, thereby increasing the overall energy utilization rate of the system by more than 30% and significantly reducing the energy consumption of traditional external heating / cooling devices; at the same time, it instantly absorbs excess heat under high heat production conditions and reversely supplies heat during cold start or low temperature environments, which not only extends the battery life but also eliminates the need for an auxiliary heater and its supporting power system.

[0006] Preferably, the bipolar plate fuel cell stack needs to be cooled, specifically by: If the temperature of the bipolar fuel cell stack is greater than a first preset temperature threshold, and the temperature difference between the temperature of the bipolar fuel cell stack and the temperature of the fluid is greater than the first threshold, the bipolar fuel cell stack needs to be cooled.

[0007] Preferably, the bipolar fuel cell needs to be heated, specifically by: If the temperature of the bipolar fuel cell stack is lower than the second preset temperature threshold, and the temperature difference between the temperature of the bipolar fuel cell stack and the temperature of the fluid is lower than the second threshold, the bipolar fuel cell needs to be heated.

[0008] In a second aspect, the present invention provides an industrial-grade fuel cell bidirectional temperature control and heat transfer device, comprising a low-temperature energy storage tank, a high-temperature energy storage tank, and an intelligent switching valve group. The industrial-grade fuel cell includes a bipolar plate fuel cell stack, and the fluid flow channel inlet and outlet of the bipolar plate fuel cell stack are connected to the fluid flow channel inlet and outlet of the low-temperature energy storage tank and the high-temperature energy storage tank; The fluid inlet and outlet between the low-temperature energy storage tank and the high-temperature energy storage tank are connected; The intelligent switching valve group is used to control the working status of the low-temperature energy storage tank and the high-temperature energy storage tank.

[0009] This application builds a closed-loop energy recovery system that stores waste heat from the battery in a high-temperature tank during the cooling phase and releases the stored heat during the heating phase, increasing the system's overall energy utilization by over 30% and significantly reducing the energy consumption of traditional external heating / cooling devices. Furthermore, the system instantly absorbs excess heat during high-heat-generating conditions and reversely provides heat during cold starts or low-temperature environments, extending battery life while eliminating the need for an auxiliary heater and its associated power system.

[0010] Preferably, the intelligent switching valve group includes a controller, and the controller is respectively connected to a temperature sensor, a first electromagnetic reversing valve, a second electromagnetic reversing valve and a third electromagnetic reversing valve, wherein: There are two temperature sensors, which respectively collect the temperature of the bipolar plate fuel cell stack and the temperature of the fluid working medium; The first electromagnetic reversing valve is arranged on the connecting pipe between the low-temperature energy storage tank and the bipolar plate fuel cell stack; The second electromagnetic reversing valve is arranged on the connecting pipe between the high-temperature energy storage tank and the bipolar plate fuel cell stack; The third electromagnetic reversing valve is arranged on the connecting pipe between the high-temperature energy storage tank and the low-temperature energy storage tank.

[0011] Preferably, the connecting pipe between the low-temperature energy storage tank and the bipolar plate fuel cell stack is provided with a centrifugal pump.

[0012] Preferably, the connecting pipe between the high-temperature energy storage tank and the bipolar plate fuel cell stack is provided with a compressor.

[0013] Preferably, a plurality of first bosses and a plurality of second bosses are provided in the fluid flow channel of the bipolar plate fuel cell stack, wherein the first bosses and the second bosses are arranged at intervals; One end of the first boss is fixed to the inner wall of one end of the flow channel, and a gap is provided between the other end of the first boss and the inner wall of the other end of the flow channel; One end of the second boss is fixed to the inner wall of the other end of the flow channel, and a gap is provided between the other end of the second boss and the inner wall of the one end of the flow channel.

[0014] Preferably, the first boss and the second boss are both column-shaped or strip-shaped.

[0015] Preferably, the fluid of the low-temperature energy storage tank is ethylene glycol coolant.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a bidirectional temperature-controlled heat transfer method for industrial-grade fuel cells. By introducing a circulating working fluid system for high- and low-temperature energy storage tanks, this method achieves bidirectional heat regulation in the fuel cell stack. This application constructs a closed-loop energy recovery system that stores waste heat from the battery in a high-temperature tank during the cooling phase and releases the stored heat energy during the heating phase, increasing the overall energy utilization rate of the system by over 30% and significantly reducing the energy consumption of traditional external heating / cooling devices. Furthermore, this method overcomes the one-way heat dissipation limitations of traditional thermal management systems and achieves a "peak shaving and valley filling" effect through the spatiotemporal transfer of heat: it instantly absorbs excess heat under high-heat-producing conditions and reversely supplies heat during cold starts or low-temperature environments, extending battery life while eliminating the need for auxiliary heaters and their associated power systems.

[0017] Furthermore, the boss structures are evenly distributed in the fluid flow channel. These bosses can change the flow state of the working fluid in the flow channel, form turbulence and increase the contact area between the fluid and the plate, thereby significantly improving the heat transfer efficiency and ensuring more sufficient heat exchange between the fuel cell stack and the working fluid.

[0018] In summary, the modular design of high and low energy storage tanks can flexibly adapt to different power requirements. By adjusting the working fluid circulation rate and heat storage capacity, it can not only meet the continuous heating needs of kilowatt-level distributed power stations, but also cope with the transient heat load fluctuations of hundreds of kilowatt-level automotive power systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the flow path of a bipolar plate fuel cell stack according to an embodiment of the present invention; Figure 2 is a schematic diagram of a flow chart of an embodiment of the present invention; Among them, 1. fluid flow channel; 2. first boss; 3. second boss. DETAILED DESCRIPTION

[0020] In the following description, specific details such as specific system structures and techniques are provided for purposes of illustration rather than limitation to facilitate a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid obscuring the description of the present application with unnecessary detail.

[0021] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or collections thereof.

[0022] It will also be understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0023] As used in this specification and the appended claims, the term "if" can be interpreted as "when" or "upon" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" can be interpreted as meaning "upon determination" or "in response to determining" or "upon detection of [described condition or event]" or "in response to detecting [described condition or event]," depending on the context.

[0024] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0025] References to "one embodiment" or "some embodiments" in this specification mean that a particular feature, structure, or characteristic described in conjunction with that embodiment is included in one or more embodiments of the present application. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in other embodiments" appearing in various places in this specification do not necessarily refer to the same embodiment, but rather mean "one or more but not all embodiments," unless otherwise specifically emphasized. The terms "including," "comprising," "having," and variations thereof all mean "including but not limited to," unless otherwise specifically emphasized.

[0026] Example 1 This embodiment provides a bidirectional temperature control and heat transfer method for an industrial fuel cell, wherein the industrial fuel cell is a bipolar plate fuel cell, comprising the following steps: Obtain the temperature of the bipolar plate fuel cell stack and the fluid temperature; Compare the temperature of the bipolar plate fuel cell stack and the fluid working medium temperature with a first preset threshold, and control the working state of the energy storage unit according to the comparison result, wherein the first preset threshold includes a first preset temperature threshold and a first threshold, wherein: If the temperature of the bipolar plate fuel cell stack is greater than a first preset temperature threshold, and the temperature difference between the temperature of the bipolar plate fuel cell stack and the temperature of the fluid working medium is greater than the first threshold, the bipolar plate fuel cell stack is cooled by the energy storage unit; Otherwise, the temperature of the bipolar plate fuel cell stack and the fluid working medium temperature are compared with a second preset threshold value, and the working state of the energy storage unit is controlled according to the comparison result, wherein the second preset threshold value includes a second preset temperature threshold value and a second threshold value. If the temperature of the bipolar plate fuel cell stack is lower than a second preset temperature threshold, and the temperature difference between the temperature of the bipolar plate fuel cell stack and the temperature of the fluid working medium is lower than the second threshold, the bipolar plate fuel cell stack is heated by the energy storage unit; Otherwise, the energy storage unit does not work.

[0027] In this embodiment, a closed-loop energy recovery system is implemented. During the cooling phase, waste heat from the battery is stored in a high-temperature tank, and the stored heat is released during the heating phase. This improves the overall system energy utilization by over 30%, significantly reducing the energy consumption of traditional external heating / cooling devices. Furthermore, this system overcomes the one-way heat dissipation limitations of traditional thermal management systems, achieving a "peak shaving and valley filling" effect through the temporal and spatial transfer of heat: it instantly absorbs excess heat during high-heat-generating conditions, while providing reverse heat during cold starts or low-temperature environments. This not only extends battery life but also eliminates the need for an auxiliary heater and its associated power system.

[0028] In summary, the modular design of high and low energy storage tanks can flexibly adapt to different power requirements. By adjusting the working fluid circulation rate and heat storage capacity, it can not only meet the continuous heating needs of kilowatt-level distributed power stations, but also cope with the transient heat load fluctuations of hundreds of kilowatt-level automotive power systems.

[0029] Example 2 like Figure 2 As shown, this embodiment provides a bidirectional temperature control and heat transfer method for an industrial-grade fuel cell, wherein the industrial-grade fuel cell is a bipolar plate fuel cell, comprising the following steps: Obtain the temperature T1 of the bipolar plate fuel cell stack and the fluid temperature T2; The temperature of the bipolar fuel cell stack and the fluid temperature are compared with preset thresholds, and the working state of the energy storage unit is controlled according to the comparison results, wherein: If the temperature of the bipolar fuel cell stack is greater than a first preset temperature threshold (65°C), and the temperature difference between the temperature of the bipolar fuel cell stack and the temperature of the fluid working medium is greater than a first threshold (15°C), the valve on the cooling pipe between the energy storage unit and the bipolar fuel cell stack is opened, the valve on the heating pipe between the energy storage unit and the bipolar fuel cell stack is closed, and the centrifugal pump on the cooling pipe is turned on to transport the fluid medium in the low-temperature energy storage tank in the energy storage unit to the flow channel of the bipolar fuel cell stack, absorb the heat in the bipolar fuel cell stack and transfer it to the high-temperature energy storage tank in the energy storage unit for storage, and the cooled fluid medium returns to the low-temperature energy storage tank; During the operation of the low-temperature energy storage tank, when the temperature of the bipolar plate fuel cell stack is less than or equal to the first preset temperature threshold, the power of the centrifugal pump is adjusted by the PID algorithm so that the temperature of the bipolar plate fuel cell stack can be stabilized, and the low-temperature energy storage tank stops running after the set time.

[0030] If the temperature of the bipolar plate fuel cell stack is lower than the second preset temperature threshold (40°C), and the temperature difference between the temperature of the bipolar plate fuel cell stack and the temperature of the fluid working medium is lower than the second threshold (5°C), the valve on the heating pipe between the energy storage unit and the bipolar plate fuel cell stack is opened, the valve on the cooling pipe between the energy storage unit and the bipolar plate fuel cell stack is closed, and the heating compressor on the heating pipe is turned on to transport the fluid medium in the low-temperature energy storage tank to the high-temperature energy storage tank for heating. The heated fluid working medium enters the flow channel of the bipolar plate fuel cell stack, releases heat to heat the bipolar plate fuel cell stack, and the cooled fluid medium returns to the low-temperature energy storage tank.

[0031] During the operation of the high-temperature energy storage tank, when the temperature of the bipolar plate fuel cell stack is greater than or equal to the second preset temperature threshold, the power of the heating compressor is adjusted through the PID algorithm so that the temperature of the bipolar plate fuel cell stack can be stabilized, and the high-temperature energy storage tank stops running after the set time.

[0032] Example 3 This embodiment provides an industrial-grade fuel cell bidirectional temperature control and heat transfer structure, including a low-temperature energy storage tank, a high-temperature energy storage tank, and an intelligent switching valve group, wherein: The industrial-grade fuel cell comprises a bipolar plate fuel cell stack, wherein the fluid flow channel inlet and outlet of the bipolar plate fuel cell stack are connected to the fluid flow channel inlet and outlet of the low-temperature energy storage tank and the high-temperature energy storage tank; The high-temperature energy storage tank and the low-temperature energy storage tank are connected via a pipeline.

[0033] The intelligent switching valve group includes a controller, and the controller is respectively connected to a temperature sensor, a first electromagnetic reversing valve, a second electromagnetic reversing valve and a third electromagnetic reversing valve, wherein: There are two temperature sensors, which respectively collect the temperature of the bipolar plate fuel cell stack and the temperature of the fluid working medium; The first electromagnetic reversing valve is arranged on the connecting pipe between the low-temperature energy storage tank and the bipolar plate fuel cell stack; The second electromagnetic reversing valve is arranged on the connecting pipe between the high-temperature energy storage tank and the bipolar plate fuel cell stack; The third electromagnetic reversing valve is arranged on the connecting pipe between the high-temperature energy storage tank and the low-temperature energy storage tank.

[0034] In this embodiment, during cooling operation, the fluid absorbs heat from the bipolar fuel cell stack, and the heated fluid transfers the heat to the molten salt phase change material in the high-temperature energy storage tank, thereby recovering and storing waste heat. During heating conditions, the molten salt in the high-temperature energy storage tank releases the stored heat to heat the fluid working medium. The heated fluid working medium provides the required heat for the bipolar fuel cell stack. The fluid working medium, after releasing heat and cooling down, stores the cold energy back to the low-temperature energy storage tank, forming a two-way energy closed loop of "cooling heat storage - heating heat" and "heating cold storage - cooling cold".

[0035] In this embodiment, a closed-loop energy recovery system is implemented. During the cooling phase, waste heat from the battery is stored in a high-temperature tank, and the stored heat is released during the heating phase. This improves the overall system energy utilization by over 30%, significantly reducing the energy consumption of traditional external heating / cooling devices. Furthermore, this system overcomes the one-way heat dissipation limitations of traditional thermal management systems, achieving a "peak shaving and valley filling" effect through the temporal and spatial transfer of heat: it instantly absorbs excess heat during high-heat-generating conditions, while providing reverse heat during cold starts or low-temperature environments. This not only extends battery life but also eliminates the need for an auxiliary heater and its associated power system.

[0036] In summary, the modular design of high and low energy storage tanks can flexibly adapt to different power requirements. By adjusting the working fluid circulation rate and heat storage capacity, it can not only meet the continuous heating needs of kilowatt-level distributed power stations, but also cope with the transient heat load fluctuations of hundreds of kilowatt-level automotive power systems.

[0037] Example 4 like Figure 1 As shown, based on Example 3, this embodiment provides an industrial-grade fuel cell bidirectional temperature control heat transfer structure, wherein a plurality of first bosses and a plurality of second bosses are provided in the fluid flow channel of the bipolar plate fuel cell stack, wherein the first bosses and the second bosses are arranged at intervals.

[0038] One end of the first boss is fixed to the inner wall of one end of the flow channel, and a gap is provided between the other end of the first boss and the inner wall of the other end of the flow channel.

[0039] One end of the second boss is fixed to the inner wall of the other end of the flow channel, and a gap is provided between the other end of the second boss and the inner wall of the one end of the flow channel.

[0040] The plurality of first bosses and the plurality of second bosses are spaced apart from each other, so that an S-shaped flow channel is formed on the surface of the bipolar plate.

[0041] Multiple first bosses and multiple second bosses can change the flow state of the working medium in the flow channel, form turbulence and increase the contact area between the fluid and the electrode plate, thereby significantly improving the heat transfer efficiency and ensuring more sufficient heat exchange between the fuel cell stack and the fluid working medium.

[0042] The core of this embodiment lies in achieving bidirectional heat flow and efficient utilization through the unique design of the fluid flow paths in the bipolar fuel cell stack and the closed loop of the high and low temperature energy storage tanks. Boss structures are evenly distributed within the fluid flow paths. These bosses alter the flow state of the fluid within the flow paths, creating turbulence and increasing the contact area between the fluid and the plates. This significantly improves heat transfer efficiency and ensures more efficient heat exchange between the fuel cell stack and the working fluid.

[0043] Example 5 Based on Example 4, this example provides an industrial-grade fuel cell bidirectional temperature control and heat transfer structure, wherein the low-temperature energy storage tank fluid is ethylene glycol coolant.

[0044] Example 6 Based on Example 4, this example provides an industrial-grade fuel cell bidirectional temperature control and heat transfer structure, wherein the first boss and the second boss are both columnar.

[0045] Example 7 Based on Example 4, this example provides an industrial-grade fuel cell bidirectional temperature control and heat transfer structure, wherein the first boss and the second boss are both strip-shaped to optimize the turbulence effect and the pressure drop balance.

[0046] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A bidirectional temperature control heat transfer method for industrial fuel cells, characterized in that: The industrial-grade fuel cell is a bipolar plate fuel cell, comprising the following steps: When the bipolar fuel cell stack needs to be cooled, the fluid in the low-temperature energy storage tank absorbs the heat in the bipolar fuel cell. The heated fluid transfers the heat to the high-temperature energy storage tank for storage, and the cooled fluid returns to the low-temperature energy storage tank. When the bipolar fuel cell needs to be heated, the fluid working medium in the low-temperature energy storage tank absorbs the heat in the high-temperature energy storage tank. The heated fluid working medium transfers the heat to the bipolar fuel cell to add powder to it, and the cooled fluid working medium returns to the low-temperature energy storage tank.

2. The method for bidirectional temperature control and heat transfer of an industrial fuel cell according to claim 1, characterized in that: The specific method to determine whether the bipolar plate fuel cell stack needs cooling is: If the temperature of the bipolar fuel cell stack is greater than a first preset temperature threshold, and the temperature difference between the temperature of the bipolar fuel cell stack and the temperature of the fluid is greater than the first threshold, the bipolar fuel cell stack needs to be cooled.

3. The industrial-grade fuel cell bidirectional temperature control heat transfer method according to claim 1, characterized in that: The specific method to determine whether a bipolar fuel cell needs to be heated is: If the temperature of the bipolar fuel cell stack is lower than the second preset temperature threshold, and the temperature difference between the temperature of the bipolar fuel cell stack and the temperature of the fluid is lower than the second threshold, the bipolar fuel cell needs to be heated.

4. An industrial-grade fuel cell bidirectional temperature control heat transfer device, characterized in that: It includes a low-temperature energy storage tank, a high-temperature energy storage tank and an intelligent switching valve group. The industrial-grade fuel cell includes a bipolar plate fuel cell stack. The fluid flow channel inlet and outlet of the bipolar plate fuel cell stack are connected to the fluid flow channel inlet and outlet of the low-temperature energy storage tank and the high-temperature energy storage tank; The fluid inlet and outlet between the low-temperature energy storage tank and the high-temperature energy storage tank are connected; The intelligent switching valve group is used to control the working status of the low-temperature energy storage tank and the high-temperature energy storage tank.

5. The industrial-grade fuel cell bidirectional temperature control heat transfer device according to claim 4, characterized in that: The intelligent switching valve group includes a controller, and the controller is respectively connected to a temperature sensor, a first electromagnetic reversing valve, a second electromagnetic reversing valve and a third electromagnetic reversing valve, wherein: There are two temperature sensors, which respectively collect the temperature of the bipolar plate fuel cell stack and the temperature of the fluid working medium; The first electromagnetic reversing valve is arranged on the connecting pipe between the low-temperature energy storage tank and the bipolar plate fuel cell stack; The second electromagnetic reversing valve is arranged on the connecting pipe between the high-temperature energy storage tank and the bipolar plate fuel cell stack; The third electromagnetic reversing valve is arranged on the connecting pipe between the high-temperature energy storage tank and the low-temperature energy storage tank.

6. The industrial-grade fuel cell bidirectional temperature control heat transfer device according to claim 4, characterized in that: The connecting pipe between the low-temperature energy storage tank and the bipolar plate fuel cell stack is provided with a centrifugal pump.

7. The industrial-grade fuel cell bidirectional temperature control heat transfer device according to claim 4, characterized in that: The connecting pipe between the high-temperature energy storage tank and the bipolar plate fuel cell stack is provided with a compressor.

8. The industrial-grade fuel cell bidirectional temperature control heat transfer device according to claim 4, characterized in that: A plurality of first bosses and a plurality of second bosses are provided in the fluid flow channel of the bipolar plate fuel cell stack, wherein the first bosses and the second bosses are arranged at intervals; One end of the first boss is fixed to the inner wall of one end of the flow channel, and a gap is provided between the other end of the first boss and the inner wall of the other end of the flow channel; One end of the second boss is fixed to the inner wall of the other end of the flow channel, and a gap is provided between the other end of the second boss and the inner wall of the one end of the flow channel.

9. The industrial-grade fuel cell bidirectional temperature control heat transfer device according to claim 8, characterized in that: The first boss and the second boss are both column-shaped or strip-shaped.

10. The industrial-grade fuel cell bidirectional temperature control heat transfer device according to claim 4, characterized in that: The fluid working medium of the low-temperature energy storage tank is ethylene glycol coolant.

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