Battery stack thermal management system, method and device, electronic equipment and storage medium

Abstract

The invention provides a battery stack heat management system, method and device, electronic equipment and a storage medium, and the battery stack heat management system comprises a battery stack, a first circulating water pump, a hydrogen preheating heat exchanger, an air radiator, a heat storage water tank, a first three-way valve and a second three-way valve, the cooling liquid used for cooling the battery stack can be heated through the air radiator and the heat storage water tank, the cooling liquid heating speed is increased, in addition, the cooling liquid used for cooling the battery stack can be cooled through the hydrogen preheating heat exchanger and the heat storage water tank, the hydrogen preheating heat exchanger, the air radiator and the heat storage water tank do not need to consume electricity, and the energy consumption is reduced. The circulating water pump is low in power consumption, the energy use efficiency can be improved, especially in the starting and shutdown stages of the battery stack, the temperature of the cooling liquid in the system can be rapidly adjusted through the heat storage water tank, rapid starting of the battery stack can be achieved, and the system is suitable for the thermal management scene of the vehicle-mounted fuel battery stack.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery stack thermal management system, method, device, electronic equipment and storage medium. Background Art

[0002] In the related art, most of the coolants are heated by PTC (Positive Temperature Coefficient) heaters, which heat the coolant slowly. In addition, PTC heaters consume a lot of power, resulting in low energy efficiency. In addition, in the related art, most of the coolants are cooled by fans, which consume a lot of power, resulting in low energy efficiency. Summary of the invention

[0003] The present application aims to solve one of the technical problems in the related art at least to some extent.

[0004] To this end, the first objective of the present application is to propose a battery stack thermal management system.

[0005] The second objective of the present application is to provide a battery stack thermal management method.

[0006] The third objective of the present application is to provide a battery stack thermal management device.

[0007] The fourth objective of the present application is to provide an electronic device.

[0008] A fifth objective of the present application is to provide a computer-readable storage medium.

[0009] A sixth object of the present application is to provide a computer program product.

[0010] To achieve the above-mentioned purpose, the first embodiment of the present application proposes a battery stack thermal management system, including: a battery stack, a first circulating water pump, a hydrogen preheating heat exchanger, an air radiator, a heat storage tank, a first three-way valve and a second three-way valve; wherein,

[0011] The outlet of the first circulating water pump is connected to the coolant inlet of the battery stack, the coolant outlet of the battery stack is connected to the coolant inlet of the air radiator, the coolant outlet of the air radiator is connected to the coolant inlet of the hydrogen preheating heat exchanger, the coolant outlet of the hydrogen preheating heat exchanger is connected to the inlet of the first three-way valve, and the first outlet of the first three-way valve is connected to the coolant inlet of the first circulating water pump;

[0012] The hydrogen inlet of the hydrogen preheating heat exchanger is connected to the hydrogen outlet of the hydrogen supplier, and the hydrogen outlet of the hydrogen heat exchanger is connected to the hydrogen inlet of the battery stack;

[0013] The air inlet of the air radiator is connected to the air outlet of the air supplier, and the air outlet of the air radiator is connected to the air inlet of the battery stack;

[0014] The second outlet of the first three-way valve is connected to the inlet of the second three-way valve, the first outlet of the second three-way valve is connected to the inlet of the hot water storage tank, and the outlet of the hot water storage tank is connected to the inlet of the first circulating water pump.

[0015] To achieve the above-mentioned purpose, the second aspect embodiment of the present application proposes a battery stack thermal management method, which is applicable to the battery stack thermal management system described in the first aspect embodiment above, and the method includes: identifying whether the first coolant temperature at the coolant inlet of the battery electric propulsion is greater than or equal to the first set temperature; in response to the first coolant temperature being greater than or equal to the first set temperature, starting the battery stack; in response to the first coolant temperature being less than the first set temperature, executing a first processing flow; wherein the first processing flow includes: continuing to close the battery stack, opening the second outlet of the first three-way valve, the first outlet of the second three-way valve and the first circulating water pump, and adjusting the speed of the first circulating water pump.

[0016] To achieve the above-mentioned purpose, the third aspect embodiment of the present application proposes a battery stack thermal management device, which is suitable for the battery stack thermal management system described in the first aspect embodiment above, and the device includes: an identification module, used to identify whether the first coolant temperature at the coolant inlet of the battery stack is greater than or equal to the first set temperature; a starting module, used to start the battery stack in response to the first coolant temperature being greater than or equal to the first set temperature; an execution module, used to execute a first processing flow in response to the first coolant temperature being less than the first set temperature; wherein the first processing flow includes: continuing to close the battery stack, opening the second outlet of the first three-way valve, the first outlet of the second three-way valve and the first circulating water pump, and adjusting the speed of the first circulating water pump.

[0017] To achieve the above-mentioned purpose, the fourth aspect embodiment of the present application proposes an electronic device, comprising: a processor, and a memory communicatively connected to the processor; the memory stores computer-executable instructions; the processor executes the computer-executable instructions stored in the memory to implement the method described in the second aspect embodiment above.

[0018] To achieve the above-mentioned purpose, the fifth aspect embodiment of the present application proposes a computer-readable storage medium, in which computer execution instructions are stored. When the computer execution instructions are executed by a processor, they are used to implement the method described in the second aspect embodiment above.

[0019] To achieve the above-mentioned purpose, the sixth aspect of the present application proposes a computer program product, including a computer program, which, when executed by a processor, implements the method described in the second aspect of the present application.

[0020] The present application provides a battery stack thermal management system, method, device, electronic device and storage medium, wherein the battery stack thermal management system includes a battery stack, a first circulating water pump, a hydrogen preheating heat exchanger, an air radiator, a heat storage tank, a first three-way valve and a second three-way valve. The coolant used to cool the battery stack can be heated by the air radiator and the heat storage tank, thereby improving the heating speed of the coolant. In addition, the coolant used to cool the battery stack can be cooled by the hydrogen preheating heat exchanger and the heat storage tank. The hydrogen preheating heat exchanger, the air radiator and the heat storage tank do not require electricity, and the circulating water pump consumes less power, which also helps to improve energy utilization efficiency. Especially during the startup and shutdown stages of the battery stack, the coolant temperature in the system can be quickly adjusted by the heat storage tank, which helps to achieve rapid startup of the battery stack and is suitable for thermal management scenarios of vehicle-mounted fuel cell stacks.

[0021] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0023] Figure 1 A schematic diagram of the structure of a battery stack thermal management system provided in an embodiment of the present application;

[0024] Figure 2 A schematic diagram of a process flow of a battery stack thermal management method provided in an embodiment of the present application;

[0025] Figure 3 A schematic flow chart of another battery stack thermal management method provided in an embodiment of the present application;

[0026] Figure 4 A schematic flow chart of another battery stack thermal management method provided in an embodiment of the present application;

[0027] Figure 5 A schematic flow chart of another battery stack thermal management method provided in an embodiment of the present application;

[0028] Figure 6 A schematic diagram of the structure of a battery stack thermal management device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0029] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0030] The following describes a battery stack thermal management system, method, device, electronic device, and storage medium according to embodiments of the present application with reference to the accompanying drawings.

[0031] Figure 1 A schematic diagram of a battery stack thermal management system provided in an embodiment of the present application.

[0032] In the related art, most of the coolants are heated by PTC (Positive Temperature Coefficient) heaters, which heat the coolant slowly. In addition, PTC heaters consume a lot of power, resulting in low energy efficiency. In addition, in the related art, most of the coolants are cooled by fans, which consume a lot of power, resulting in low energy efficiency.

[0033] To address this problem, an embodiment of the present application provides a battery stack thermal management system, including a battery stack, a first circulating water pump, a hydrogen preheating heat exchanger, an air radiator, a heat storage tank, a first three-way valve and a second three-way valve. The coolant used to cool the battery stack can be heated by the air radiator and the heat storage tank, thereby improving the heating speed of the coolant. In addition, the coolant used to cool the battery stack can be cooled by the hydrogen preheating heat exchanger and the heat storage tank. The hydrogen preheating heat exchanger, the air radiator and the heat storage tank do not require electricity, and the circulating water pump consumes less power, which also helps to improve energy utilization efficiency. Especially during the startup and shutdown stages of the battery stack, the coolant temperature in the system can be quickly adjusted by the heat storage tank, which helps to achieve rapid startup of the battery stack and is suitable for thermal management scenarios of on-board fuel cell stacks.

[0034] like Figure 1 As shown, the battery stack thermal management system 100 includes a battery stack 1, a first circulating water pump 2, a hydrogen preheating heat exchanger 13, an air radiator 14, a hot water storage tank 10, a first three-way valve 12 and a second three-way valve 11.

[0035] The battery stack 1 has a coolant inlet a, a coolant outlet d, an air inlet b, an air outlet, a hydrogen inlet c, and a hydrogen outlet.

[0036] The hydrogen preheating heat exchanger 13 has a hydrogen inlet e, a hydrogen outlet f, a coolant inlet and a coolant outlet.

[0037] The air radiator 14 has an air inlet g, an air outlet h, a coolant inlet, and a coolant outlet.

[0038] The outlet of the first circulating water pump 2 is connected to the coolant inlet of the battery stack 1, the coolant outlet of the battery stack 1 is connected to the coolant inlet of the air radiator 14, the coolant outlet of the air radiator 14 is connected to the coolant inlet of the hydrogen preheating heat exchanger 13, the coolant outlet of the hydrogen preheating heat exchanger 13 is connected to the inlet of the first three-way valve 12, and the first outlet of the first three-way valve 12 is connected to the coolant inlet of the first circulating water pump 2.

[0039] The hydrogen inlet of the hydrogen preheating heat exchanger 13 is connected to the hydrogen outlet of the hydrogen supply device (not shown in the figure), and the hydrogen outlet of the hydrogen preheating heat exchanger 13 is connected to the hydrogen inlet of the battery stack 1.

[0040] The air inlet of the air radiator 14 is connected to the air outlet of an air supply device (not shown in the figure), and the air outlet of the air radiator 14 is connected to the air inlet of the battery stack 1 .

[0041] The second outlet of the first three-way valve 12 is connected to the inlet of the second three-way valve 11 , the first outlet of the second three-way valve 11 is connected to the inlet of the hot water storage tank 10 , and the outlet of the hot water storage tank 10 is connected to the inlet of the first circulating water pump 2 .

[0042] It should be noted that the battery stack 1 in the embodiment of the present disclosure is a hydrogen fuel cell stack that uses hydrogen energy to generate electrical energy. Figure 1 The arrows in the figure indicate the flow direction of coolant, air and hydrogen.

[0043] In the embodiment of the present application, the coolant used to cool the battery stack is used as coolant A. The battery stack 1, the first circulating water pump 2, the hydrogen preheating heat exchanger 13, the air radiator 14 and the first three-way valve 12 constitute the first circuit of the coolant A. The first circuit of the coolant A is described below.

[0044] It is understandable that after the battery stack is started, the coolant A can be heated by the heat generated by the battery stack itself.

[0045] The coolant A discharged from the outlet of the first circulating water pump 2 enters the battery stack 1 through the coolant inlet of the battery stack 1 to cool the battery stack 1 .

[0046] The coolant A discharged from the coolant outlet of the battery stack 1 enters the air radiator 14 through the coolant inlet of the air radiator 14 and absorbs heat from the air in the air radiator 14, that is, the air radiator 14 can use the coolant A to cool the air and use the air to heat the coolant A.

[0047] The coolant A discharged from the coolant outlet of the air radiator 14 enters the hydrogen preheating heat exchanger 13 through the coolant inlet of the hydrogen preheating heat exchanger 13, and releases heat to the hydrogen in the hydrogen preheating heat exchanger 13, that is, the hydrogen preheating heat exchanger 13 can use the coolant A to heat the hydrogen and use the hydrogen to cool the coolant A.

[0048] The coolant A discharged from the coolant outlet of the hydrogen preheating heat exchanger 13 returns to the first circulating water pump 2 through the inlet of the first three-way valve 12 and the first outlet thereof.

[0049] The battery stack 1, the first circulating water pump 2, the hydrogen preheating heat exchanger 13, the air radiator 14, the hot water storage tank 10, the first three-way valve 12 and the second three-way valve 11 constitute the second circuit of the coolant A. The second circuit of the coolant A is described below.

[0050] The coolant A discharged from the coolant outlet of the hydrogen preheating heat exchanger 13 enters the hot water storage tank 10 through the inlet and the second outlet of the first three-way valve 12, the inlet and the first outlet of the second three-way valve 11, and the hot water storage tank 10 heats or cools the coolant A. Then, the coolant A is discharged from the outlet of the hot water storage tank 10 and returns to the first circulating water pump 2. It should be noted that there is an overlap between the first circuit of the coolant A and the second circuit of the coolant A, and the contents of the overlap are not repeated here.

[0051] It is understandable that if the first coolant temperature T1 at the coolant inlet of the battery stack is lower than the fourth coolant temperature T4 inside the hot water storage tank 10, the hot water storage tank 10 can heat the coolant A. If T1>T4, the hot water storage tank 10 can cool the coolant A.

[0052] The battery stack 1, the hydrogen preheating heat exchanger 13 and the hydrogen supply device constitute a hydrogen circuit. The hydrogen circuit is described below.

[0053] The hydrogen discharged from the hydrogen outlet of the hydrogen supply device enters the hydrogen preheating heat exchanger 13 through the hydrogen inlet of the hydrogen preheating heat exchanger 13, and absorbs heat from the coolant A in the hydrogen preheating heat exchanger 13, that is, the hydrogen preheating heat exchanger 13 can use the coolant A to heat the hydrogen and use the hydrogen to cool the coolant A. The hydrogen discharged from the hydrogen outlet of the hydrogen preheating heat exchanger 13 enters the battery stack 1 through the hydrogen inlet of the battery stack 1.

[0054] The battery stack 1, the air radiator 14 and the air supply device constitute an air circuit. The air circuit will be described below.

[0055] The air discharged from the air outlet of the air supply device enters the air radiator 14 through the air inlet of the air radiator 14, and releases heat to the coolant A in the air radiator 14, that is, the air radiator 14 can heat the coolant A with the air, and cool the air with the coolant A. The air discharged from the air outlet of the air radiator 14 enters the battery stack 1 through the air inlet of the battery stack 1.

[0056] In the related art, the coolant is mostly heated by a PTC (Positive Temperature Coefficient) heater, but the cooling liquid is heated slowly. In addition, the PTC heater consumes a lot of power, resulting in low energy efficiency.

[0057] In this solution, the coolant used to cool the battery stack can be heated by an air radiator and a heat storage tank, which increases the cooling speed of the coolant. In addition, the air radiator and the heat storage tank do not require electricity, and the circulating water pump consumes less electricity, which helps to improve energy efficiency. In addition, the air can be cooled by the air radiator, which helps to improve the efficiency of the battery stack and extend the life of the battery stack. In addition, this solution does not require additional air cooling equipment. The air radiator has both coolant heating and air cooling functions, which helps to reduce the complexity of the battery stack thermal management system.

[0058] In the related art, the coolant is mostly cooled by fans, which consume a lot of electricity, resulting in low energy efficiency. In this solution, the coolant used to cool the battery stack can be cooled by hydrogen preheating heat exchangers and water storage tanks. The hydrogen preheating heat exchangers and water storage tanks do not need to consume electricity, and the circulating water pump consumes less electricity, which helps to improve energy efficiency. In addition, hydrogen can be heated by hydrogen preheating heat exchangers, which helps to improve the efficiency of the battery stack and extend the life of the battery stack. In addition, this solution does not require additional hydrogen heating equipment. The hydrogen preheating heat exchanger has both coolant cooling and hydrogen heating functions, which helps to reduce the complexity of the battery stack thermal management system.

[0059] Exemplarily, the opening range of the first outlet and the second outlet of the three-way valve in the embodiment of the present application is 0 to 90 degrees, and the sum of the openings of the first outlet and the second outlet of the three-way valve is 90 degrees.

[0060] It can be understood that the hydrogen preheating heat exchanger 13 and the air radiator 14 are both a type of heat exchanger. For example, the heat exchanger in the embodiment of the present application may include a partition wall heat exchanger.

[0061] For example, if the heat exchanger includes two inlets, the two inlets of the heat exchanger are located on different sides of the heat exchanger to improve the heat exchange efficiency. Figure 1As shown, taking the air radiator 14 as an example, the coolant inlet of the air radiator 14 is located on the right shell of the air radiator, and the air inlet of the air radiator 14 is located on the left shell of the air radiator.

[0062] Exemplarily, the coolant in the embodiment of the present application may include a mixed solution of deionized water and ethylene glycol.

[0063] For example, Figure 1 As shown, the battery stack thermal management system 100 further includes a power conditioning device 22 , a traction motor 23 and an energy storage device 24 .

[0064] Exemplarily, the battery stack thermal management system 100 also includes air supply equipment, hydrogen supply equipment, hydrogen circulation equipment, an air compressor, air humidification equipment, a gas flow meter, hydrogen and air pressure safety control equipment, an expansion water tank, etc.

[0065] In summary, the battery stack thermal management system of the embodiment of the present application includes a battery stack, a first circulating water pump, a hydrogen preheating heat exchanger, an air radiator, a heat storage tank, a first three-way valve and a second three-way valve. The coolant used to cool the battery stack can be heated by the air radiator and the heat storage tank, thereby improving the heating speed of the coolant. In addition, the coolant used to cool the battery stack can be cooled by the hydrogen preheating heat exchanger and the heat storage tank. The hydrogen preheating heat exchanger, the air radiator and the heat storage tank do not require electricity, and the circulating water pump consumes less power, which also helps to improve energy utilization efficiency. Especially during the startup and shutdown stages of the battery stack, the coolant temperature in the system can be quickly adjusted by the heat storage tank, which helps to achieve rapid startup of the battery stack and is suitable for thermal management scenarios of on-board fuel cell stacks.

[0066] Based on any of the above embodiments, Figure 1 As shown, the battery stack thermal management system 100 further includes a first heat exchanger 9 and a first shut-off valve 8 .

[0067] The second outlet of the second three-way valve 11 is connected to the first inlet of the first heat exchanger 9 , the first outlet of the first heat exchanger 9 is connected to the inlet of the first circulating water pump 2 , and the first inlet of the first heat exchanger 9 is connected to the first outlet of the first heat exchanger 9 .

[0068] The outlet of the heating pipeline of the vehicle cabin (not shown in the figure) is connected to the inlet of the first stop valve 8, the outlet of the first stop valve 8 is connected to the second inlet of the first heat exchanger 9, the second outlet of the first heat exchanger 9 is connected to the inlet of the heating pipeline of the vehicle cabin, and the second inlet of the first heat exchanger 9 is connected to the second outlet of the first heat exchanger 9.

[0069] It is understandable that there is also coolant in the heating pipeline of the vehicle cabin, and the coolant used to heat the vehicle cabin (i.e., the coolant from the heating pipeline of the vehicle cabin) is used as coolant B. The heating pipeline of the vehicle cabin, the first heat exchanger 9 and the first stop valve 8 constitute a circuit of coolant B. The circuit of coolant B is described below.

[0070] The coolant B discharged from the outlet of the heating pipeline of the vehicle cabin enters the first heat exchanger 9 through the first stop valve 8 and the second inlet of the first heat exchanger 9, and absorbs heat from the coolant A in the first heat exchanger 9, that is, the first heat exchanger 9 can cool the coolant A by using the coolant B, and heat the coolant B by using the coolant A. Then, the coolant B is discharged from the second outlet of the first heat exchanger 9 and returns to the heating pipeline of the vehicle cabin.

[0071] The battery stack 1, the first circulating water pump 2, the hydrogen preheating heat exchanger 13, the air radiator 14, the first heat exchanger 9, the first three-way valve 12 and the second three-way valve 11 constitute the third circuit of the coolant A. The third circuit of the coolant A is described below.

[0072] The coolant A discharged from the coolant outlet of the hydrogen preheating heat exchanger 13 enters the first heat exchanger 9 through the inlet and the second outlet of the first three-way valve 12, the inlet and the second outlet of the second three-way valve 11, and the first inlet of the first heat exchanger 9, and releases heat to the coolant B in the first heat exchanger 9, that is, the first heat exchanger 9 can use the coolant A to heat the coolant B, and use the coolant B to cool the coolant A. After that, the coolant A is discharged from the first outlet of the first heat exchanger 9 and returns to the first circulating water pump 2. It should be noted that there is an overlap between the first circuit of the coolant A and the third circuit of the coolant A, and the content of the overlap is not repeated here.

[0073] Therefore, the battery stack thermal management system of the embodiment of the present application also includes a first heat exchanger and a first stop valve, and the coolant used to cool the battery stack can be cooled by the first heat exchanger. The first heat exchanger does not need to consume electricity, and the circulating water pump consumes less electricity, which helps to improve energy efficiency. In addition, the coolant used to heat the vehicle cabin can be heated by the first heat exchanger, so that the waste heat of the battery stack can be used for heating the vehicle cabin, which improves the heating speed of the vehicle cabin.

[0074] Based on any of the above embodiments, Figure 1 As shown, the battery stack thermal management system 100 further includes a second heat exchanger 5 , a third heat exchanger 6 , a second stop valve 7 and a second circulating water pump 4 .

[0075] The first outlet of the first heat exchanger 9 is connected to the first inlet of the second heat exchanger 5 , the first outlet of the second heat exchanger 5 is connected to the inlet of the first circulating water pump 2 , and the first inlet of the second heat exchanger 5 is communicated with the first outlet of the second heat exchanger 5 .

[0076] The outlet of the second circulating water pump 4 is connected to the second inlet of the second heat exchanger 5, the second outlet of the second heat exchanger 5 is connected to the inlet of the second stop valve 7, the second inlet of the second heat exchanger 5 is communicated with the second outlet of the second heat exchanger 5, the outlet of the second stop valve 7 is connected to the inlet of the third heat exchanger 6, and the outlet of the third heat exchanger 6 is connected to the inlet of the second circulating water pump 4.

[0077] The air outside the vehicle may flow through the third heat exchanger 6. For example, the third heat exchanger 6 is an air-cooled radiator.

[0078] It is understandable that the vehicle generates air convection during driving, so that the air outside the vehicle can flow through the third heat exchanger 6. The second heat exchanger 5, the third heat exchanger 6, the second stop valve 7 and the second circulating water pump 4 constitute a circuit of the coolant C. The circuit of the coolant C is described below.

[0079] The air outside the vehicle can flow through the third heat exchanger 6 and absorb heat from the coolant C in the third heat exchanger 6 , that is, the third heat exchanger 6 can cool the coolant C by using air.

[0080] The coolant C discharged from the outlet of the third heat exchanger 6 enters the second heat exchanger 5 through the second circulating water pump 4 and the second inlet of the second heat exchanger 5, and absorbs heat from the coolant A in the second heat exchanger 5, that is, the second heat exchanger 5 can cool the coolant A by using the coolant C, and heat the coolant C by using the coolant A. The coolant C discharged from the second outlet of the second heat exchanger 5 returns to the third heat exchanger 6 through the second stop valve 7.

[0081] The battery stack 1, the first circulating water pump 2, the hydrogen preheating heat exchanger 13, the air radiator 14, the first heat exchanger 9, the second heat exchanger 5, the first three-way valve 12 and the second three-way valve 11 constitute the fourth circuit of the coolant A. The fourth circuit of the coolant A is described below.

[0082] The coolant A discharged from the first outlet of the first heat exchanger 9 enters the second heat exchanger 5 through the first inlet of the second heat exchanger 5, and releases heat to the coolant C in the second heat exchanger 5, that is, the second heat exchanger 5 can heat the coolant C with the coolant A, and cool the coolant A with the coolant C. After that, the coolant A is discharged from the first outlet of the second heat exchanger 5 and returns to the first circulating water pump 2. It should be noted that there is an overlap between the third circuit of the coolant A and the fourth circuit of the coolant A, and the contents of the overlap are not repeated here.

[0083] Therefore, the battery stack thermal management system of the embodiment of the present application also includes a second heat exchanger, a third heat exchanger, a second stop valve and a second circulating water pump. The coolant inside it can be cooled by the third heat exchanger, and the coolant used to cool the battery stack can be cooled by the second heat exchanger, so that the atmospheric environment can be used to cool the coolant used to cool the battery stack. The second heat exchanger and the third heat exchanger do not need to consume electricity, and the circulating water pump consumes less power, which helps to improve energy utilization efficiency.

[0084] Based on any of the above embodiments, Figure 1 As shown, the battery stack thermal management system 100 further includes a fourth heat exchanger 3 , which includes a fan. The first outlet of the second heat exchanger 5 is connected to the inlet of the fourth heat exchanger 3 , and the outlet of the fourth heat exchanger 3 is connected to the first circulating water pump 2 .

[0085] For example, the fourth heat exchanger 3 is a fan-type radiator.

[0086] The battery stack 1, the first circulating water pump 2, the hydrogen preheating heat exchanger 13, the air radiator 14, the first heat exchanger 9, the second heat exchanger 5, the fourth heat exchanger 3, the first three-way valve 12 and the second three-way valve 11 constitute the fifth circuit of the coolant A. The fifth circuit of the coolant A is described below.

[0087] The coolant A discharged from the first outlet of the second heat exchanger 5 enters the fourth heat exchanger 3, and the fourth heat exchanger 3 can use a fan to cool the coolant A. Then the coolant A is discharged from the outlet of the fourth heat exchanger and returns to the first circulating water pump 2. It should be noted that there is an overlap between the fourth circuit of the coolant A and the fifth circuit of the coolant A, and the contents of the overlap are not repeated here.

[0088] Therefore, the battery stack thermal management system of the embodiment of the present application further includes a fourth heat exchanger, and the fourth heat exchanger includes a fan, and the coolant used to cool the battery stack can be cooled by the fan.

[0089] Based on any of the above embodiments, Figure 1 As shown, the battery stack thermal management system 100 further includes a first temperature sensor 15 , a second temperature sensor 16 , a third temperature sensor 17 , a fourth temperature sensor 18 , a fifth temperature sensor 19 , a sixth temperature sensor 20 and a seventh temperature sensor 21 .

[0090] The first temperature sensor 15 is located at the coolant inlet of the battery stack 1 and is used to detect a first coolant temperature T1 of the coolant inlet of the battery stack 1 .

[0091] The second temperature sensor 16 is located at the coolant outlet of the battery stack 1 and is used to detect a second coolant temperature T2 at the coolant outlet of the battery stack 1 .

[0092] The third temperature sensor 17 is located at the coolant outlet of the hydrogen preheating heat exchanger 13 and is used to detect a third coolant temperature T3 at the coolant outlet of the hydrogen preheating heat exchanger 13 .

[0093] The fourth temperature sensor 18 is located inside the energy storage water tank 10 and is used to detect a fourth coolant temperature T4 inside the energy storage water tank 10 .

[0094] The fifth temperature sensor 19 is located at the first outlet of the first heat exchanger 9 , and is used to detect the fifth coolant temperature T5 at the first outlet of the first heat exchanger 9 .

[0095] The sixth temperature sensor 20 is located at the first outlet of the second heat exchanger 5 , and is used to detect a sixth coolant temperature T6 at the first outlet of the second heat exchanger 5 .

[0096] The seventh temperature sensor 21 is located at the second outlet of the first heat exchanger 9 , and is used to detect the seventh coolant temperature Tp at the second outlet of the first heat exchanger 9 .

[0097] It should be noted that the second outlet of the first heat exchanger 9 is connected to the inlet of the heating pipeline of the vehicle cabin, and Tp can be used as the actual temperature of the vehicle cabin.

[0098] The embodiment of the present application provides a battery stack thermal management method, which is applicable to the battery stack thermal management system provided in the above embodiments.

[0099] like Figure 2 As shown, the method may include the following steps:

[0100] S201, identifying whether T1 is greater than or equal to T0.

[0101] If yes, execute step S202; if no, execute step S203.

[0102] S202, starting the battery stack.

[0103] In the embodiment of the present application, there are no excessive restrictions on the first set temperature T0, for example, it can be the lowest temperature allowed for starting the battery stack, such as 0°C.

[0104] In the embodiment of the present application, if T1 ≥ T0, it indicates that the temperature of the coolant entering the battery stack is relatively high at this time, and the battery stack can be started directly.

[0105] S203, executing the first processing flow.

[0106] It should be noted that the first processing flow includes: continuing to shut down the battery stack, opening the second outlet of the first three-way valve, the first outlet of the second three-way valve, and the first circulation water pump, and adjusting the rotation speed of the first circulation water pump.

[0107] In an embodiment of the present application, if T1 < T0, it indicates that the temperature of the coolant entering the battery stack is relatively low at this time, and the first processing flow is executed.

[0108] It can be understood that by executing the first processing flow, the second circuit of coolant A can be conducted. At this time, the battery stack is not started, and it can be known that the hydrogen supply device and the air supply device are not started either. At this time, the hydrogen preheating heat exchanger and the air radiator are only used to transfer coolant A and do not heat coolant A. At this time, only the hot water storage tank is used to heat coolant A to increase the temperature of coolant A.

[0109] In one implementation, adjusting the rotation speed of the first circulation water pump includes obtaining the second coolant temperature at the coolant outlet of the battery stack, and adjusting the rotation speed of the first circulation water pump based on the deviation between the first coolant temperature and the second coolant temperature. Thus, the rotation speed of the first circulation water pump can be adjusted in consideration of the deviation between the coolant temperature entering and leaving the battery stack.

[0110] Exemplarily, the deviation between T1 and T2 includes the difference between T1 and T2.

[0111] Exemplarily, the deviation between T1 and T2 is positively correlated with the rotation speed of the first circulation water pump.

[0112] Exemplarily, adjusting the rotation speed of the first circulation water pump based on the deviation between T1 and T2 includes obtaining the mapping relationship between the set intervals and the set rotation speeds, determining the target interval in which the deviation between T1 and T2 is located from multiple set intervals, and obtaining the set rotation speed mapped to the target interval as the rotation speed of the first circulation water pump. It can be understood that the set rotation speeds mapped by different set intervals may be different.

[0113] In summary, according to the battery stack thermal management method of the embodiments of the present application, when the first coolant temperature at the coolant inlet of the battery stack is greater than or equal to the first set temperature, the battery stack is directly started. When the first coolant temperature is less than the first set temperature, the first processing flow is executed to heat the coolant used to cool the battery stack through the hot water storage tank, which improves the heating speed of the coolant. In addition, the hot water storage tank does not consume electricity, and the circulation water pump consumes less electricity, which helps to improve the energy use efficiency, enables the battery stack to be quickly started, and is applicable to the thermal management scenario of vehicle-mounted fuel cell stacks.

[0114] The embodiments of the present application provide another battery stack thermal management method.

[0115] As Figure 3 shown, the method may include the following steps:

[0116] S301, identify whether T1 is greater than or equal to T0.

[0117] If yes, execute step S302; if no, execute step S303.

[0118] S302, start the battery stack.

[0119] S303, execute the first processing flow.

[0120] For the relevant content of steps S301 - S303, reference can be made to the above embodiments, which will not be elaborated here.

[0121] S304, identify whether T3 is greater than or equal to T0.

[0122] If yes, execute step S302; if no, return to execute step S303 and its subsequent steps.

[0123] In the embodiments of the present application, if T3 ≥ T0, it indicates that the temperature of the coolant flowing out of the hydrogen pre - heating heat exchanger is relatively high at this time, so the temperature of the coolant entering the hot water storage tank is relatively high, and there is no need to continue heating the coolant A using the hot water storage tank, and the battery stack can be directly started.

[0124] On the contrary, if T3 < T0, it indicates that the temperature of the coolant flowing out of the hydrogen pre - heating heat exchanger is relatively low at this time, and the temperature of the coolant entering the hot water storage tank is also relatively low, then return to execute the first processing flow and its subsequent steps to continue heating the coolant A using the hot water storage tank.

[0125] S305, identify whether T1 is greater than Ti.

[0126] If no, execute step S306.

[0127] It should be noted that there are no excessive limitations on the second set temperature Ti. For example, it can be the target coolant temperature at the coolant inlet of the battery stack. Ti can be a fixed value or can be dynamically updated. For example, the target coolant temperature at the coolant inlet of the battery stack may be different at different times.

[0128] S306, identify whether T1 is greater than or equal to T4.

[0129] If yes, execute step S307; if no, execute step S308.

[0130] S307, execute the second processing flow.

[0131] It should be noted that the second processing flow includes: opening the first outlet of the first three-way valve and the first circulation pump, and adjusting the rotational speed of the first circulation pump.

[0132] After executing the second processing flow, it further includes returning to execute step S305 and its subsequent steps.

[0133] In the embodiments of the present application, if T1≤Ti, it indicates that the temperature of the coolant entering the battery stack is relatively low at this time. If T1≥T4, it indicates that the temperature of the coolant inside the hot water storage tank is relatively low at this time, and the hot water storage tank cannot be used to heat the coolant A, then the second processing flow is executed.

[0134] It can be understood that by executing the second processing flow, the first circuit of the coolant A can be conducted, and the coolant A can be heated by the air radiator and the heat generated by the operation of the stack itself to increase the temperature of the coolant A.

[0135] It can be understood that after executing the second processing flow, it returns to execute the step of identifying whether T1 is greater than Ti and its subsequent steps to re-identify whether the coolant for cooling the battery stack needs to be heated or cooled, and re-execute the heating process or the cooling process.

[0136] S308, execute the third processing flow.

[0137] It should be noted that the third processing flow includes: opening the first outlet of the first three-way valve, the second outlet of the first three-way valve, the first outlet of the second three-way valve and the first circulation pump, adjusting the opening degree of at least one of the first outlet of the first three-way valve and the second outlet of the first three-way valve, and adjusting the rotational speed of the first circulation pump.

[0138] After executing the third processing flow, it further includes returning to execute step S305 and its subsequent steps.

[0139] In the embodiments of the present application, if T1≤Ti, it indicates that the temperature of the coolant entering the battery stack is relatively low at this time. If T1<T4, it indicates that the temperature of the coolant inside the hot water storage tank is relatively high at this time, and the hot water storage tank can heat the coolant A, then the third processing flow is executed.

[0140] It can be understood that by executing the third processing flow, the first circuit and the second circuit of the coolant A can be conducted, and the coolant A can be heated by the air radiator and the hot water storage tank to increase the temperature of the coolant A.

[0141] It can be understood that after executing the third processing flow, it returns to execute the step of identifying whether T1 is greater than Ti and its subsequent steps to re-identify whether the coolant for cooling the battery stack needs to be heated or cooled, and re-execute the heating process or the cooling process.

[0142] In one embodiment, adjusting the opening of at least one of the first outlet of the first three-way valve and the second outlet of the first three-way valve includes adjusting the opening of at least one of the first outlet of the first three-way valve and the second outlet of the first three-way valve based on the deviation between the fourth coolant temperature and the first coolant temperature.

[0143] Exemplarily, the deviation between T4 and T1 is negatively correlated with the opening degree of the first outlet of the first three-way valve.

[0144] Exemplarily, the deviation between T4 and T1 is positively correlated with the opening degree of the second outlet of the first three-way valve.

[0145] In summary, according to the battery stack thermal management method of the embodiment of the present application, when the first coolant temperature at the coolant inlet of the battery stack is less than or equal to the second set temperature, it can be identified whether the first coolant temperature is greater than or equal to the fourth coolant temperature inside the water storage tank. When the first coolant temperature is greater than or equal to the fourth coolant temperature, the second processing flow is executed to heat the coolant used to cool the battery stack through the air radiator and the heat generated by the battery stack itself. Conversely, when the first coolant temperature is less than the fourth coolant temperature, the third processing flow is executed to heat the coolant used to cool the battery stack through the air radiator and the water storage tank.

[0146] An embodiment of the present application provides another battery stack thermal management method.

[0147] like Figure 4 As shown, the method may include the following steps:

[0148] S401, identifying whether T1 is greater than or equal to T0.

[0149] If yes, execute step S402; if no, execute step S403.

[0150] S402, start the battery stack.

[0151] S403, executing the first processing flow.

[0152] S404, identifying whether T3 is greater than or equal to T0.

[0153] If yes, execute step S402; if no, return to execute step S403 and its subsequent steps.

[0154] For the relevant contents of steps S401 - S404 , please refer to the above embodiment and will not be described again here.

[0155] S405, identifying whether T1 is greater than Ti.

[0156] If so, perform step S406.

[0157] S406, identify whether T1 is greater than T4.

[0158] If so, perform step S407; if not, perform step S408.

[0159] S407, perform the third processing flow.

[0160] In an embodiment of the present application, if T1 > Ti, it indicates that the temperature of the coolant entering the battery stack is relatively high at this time. If T1 > T4, then the hot water storage tank can cool the coolant A at this time, and the third processing flow can be performed. The first circuit and the second circuit of the coolant A can be conducted, and the coolant A can be cooled through the hydrogen preheating heat exchanger and the hot water storage tank to reduce the temperature of the coolant A.

[0161] After performing the third processing flow, it further includes returning to perform step S405 and its subsequent steps.

[0162] It can be understood that after performing the third processing flow, it returns to perform the steps of identifying whether T1 is greater than Ti and its subsequent steps to re-identify whether the coolant for cooling the battery stack needs to be heated or cooled, and re-perform the heating process or the cooling process.

[0163] S408, identify whether Ts is greater than Tp and whether Tp is less than T3.

[0164] If so, perform step S409; if not, perform step S413.

[0165] It should be noted that the third set temperature Ts of the vehicle cockpit is not overly limited. For example, it can be 26°C.

[0166] S409, perform the fourth processing flow.

[0167] The fourth processing flow includes: opening the second outlet of the first three-way valve, the second outlet of the second three-way valve, the first stop valve, and the first circulation pump, and adjusting the rotation speed of the first circulation pump.

[0168] In an embodiment of the present application, if T1 > Ti, it indicates that the temperature of the coolant entering the battery stack is relatively high at this time. If T1 ≤ T4, it indicates that the temperature of the coolant inside the hot water storage tank is relatively high, and the hot water storage tank cannot be used to cool the coolant A. If Ts > Tp and Tp < T3, it indicates that the actual temperature of the vehicle cockpit is relatively low at this time, and the first heat exchanger can be used to cool the coolant A, then perform the fourth processing flow.

[0169] It can be understood that by executing the fourth processing flow, the third circuit of coolant A and the circuit of coolant B can be conducted, and coolant A can be cooled by the hydrogen preheating heat exchanger and the first heat exchanger to reduce the temperature of coolant A.

[0170] S410, identify whether T5 is greater than or equal to Ti.

[0171] If so, execute step S411; if not, return to execute step S405 and its subsequent steps.

[0172] It can be understood that after executing the fourth processing flow, if T5 < Ti, it indicates that the temperature of the coolant flowing out of the first heat exchanger is relatively low at this time. Then return to execute the steps of identifying whether T1 is greater than Ti and its subsequent steps to re-identify whether the coolant for cooling the battery stack needs to be heated or cooled, and re-execute the heating process or the cooling process.

[0173] S411, execute the fifth processing flow.

[0174] The fifth processing flow includes: opening the second outlet of the first three-way valve, the second outlet of the second three-way valve, the first stop valve, the second stop valve, the first circulation pump and the second circulation pump, and adjusting the rotation speeds of the first circulation pump and the second circulation pump respectively.

[0175] In the embodiment of the present application, after executing the fourth processing flow, if T5 ≥ Ti, it indicates that the temperature of the coolant flowing out of the first heat exchanger is relatively high at this time, and the hydrogen preheating heat exchanger and the first heat exchanger cannot meet the cooling requirement of coolant A. Then execute the fifth processing flow.

[0176] It can be understood that by executing the fifth processing flow, the third circuit of coolant A and the circuit of coolant B can be conducted, and coolant A can be cooled by the hydrogen preheating heat exchanger and the first heat exchanger to reduce the temperature of coolant A.

[0177] By executing the fifth processing flow, the fourth circuit of coolant A and the circuit of coolant C can also be conducted. Coolant C can be cooled by the third heat exchanger, and coolant A can be cooled by the second heat exchanger, so that coolant A can be cooled by using the atmospheric environment to reduce the temperature of coolant A.

[0178] In one implementation manner, adjusting the rotation speed of the second circulation pump includes obtaining the sixth coolant temperature at the first outlet of the second heat exchanger and adjusting the rotation speed of the second circulation pump based on the deviation amount between the sixth coolant temperature and the second set temperature. Thus, the rotation speed of the second circulation pump can be adjusted in consideration of the deviation amount between the temperature of the coolant flowing out of the second heat exchanger and the second set temperature.

[0179] Exemplarily, the deviation between T6 and Ti includes the difference between Ti and T6.

[0180] Exemplarily, the deviation between T6 and Ti is positively correlated with the rotational speed of the second circulating water pump.

[0181] It should be noted that regarding the content of adjusting the rotational speed of the second circulating water pump based on the deviation between T6 and Ti, reference can be made to the relevant content of adjusting the rotational speed of the first circulating water pump based on the deviation between T1 and T2 in the above embodiments, which will not be elaborated here.

[0182] S412, identify whether T6 is greater than or equal to Ti.

[0183] If so, execute step S415; if not, return to execute step S409 and its subsequent steps.

[0184] It can be understood that after executing the fifth processing flow, if T6 < Ti, it indicates that the temperature of the coolant flowing out of the second heat exchanger is relatively low at this time, and there is no need to continue to use the atmospheric environment to cool the coolant A. Then return to execute the fourth processing flow and its subsequent steps to continue to use the hydrogen preheating heat exchanger and the first heat exchanger to cool the coolant A.

[0185] S413, execute the sixth processing flow.

[0186] The sixth processing flow includes: opening the second outlet of the first three-way valve, the second outlet of the second three-way valve, the second stop valve, the first circulating water pump, and the second circulating water pump, and adjusting the rotational speeds of the first circulating water pump and the second circulating water pump respectively.

[0187] In the embodiments of the present application, if T1 > Ti, it indicates that the temperature of the coolant entering the fuel cell stack is relatively high at this time. If T1 ≤ T4, it indicates that the temperature of the coolant inside the hot water storage tank is relatively high, and the hot water storage tank cannot be used to cool the coolant A. If Ts ≤ Tp, and / or Tp ≥ T3, it indicates that the actual temperature of the vehicle cockpit is relatively high at this time, and the first heat exchanger cannot be used to cool the coolant A. Then execute the sixth processing flow.

[0188] It can be understood that by executing the sixth processing flow, the fourth circuit of the coolant A and the circuit of the coolant C can be conducted, the coolant C can be cooled through the third heat exchanger, and the coolant A can be cooled through the second heat exchanger, so that the atmospheric environment can be used to cool the coolant A to reduce the temperature of the coolant A.

[0189] Execute the sixth processing flow, and the third circuit of coolant A can also be conducted. At this time, the first cut-off valve is closed, that is, the circuit of coolant B is not conducted. At this time, the first heat exchanger is only used to transfer coolant A and does not exchange heat with coolant A. At this time, only the hydrogen preheating heat exchanger and the atmospheric environment are used to cool coolant A to reduce the temperature of coolant A.

[0190] S414, identify whether T6 is greater than or equal to Ti.

[0191] If so, execute step S415; if not, return to execute step S405 and its subsequent steps;

[0192] It can be understood that after executing the sixth processing flow, if T6 < Ti, it indicates that the temperature of the coolant flowing out of the second heat exchanger is relatively low at this time. Then return to execute the steps of identifying whether T1 is greater than Ti and its subsequent steps to re-identify whether the coolant for cooling the battery stack needs to be heated or cooled, and re-execute the heating process or the cooling process.

[0193] S415, re-identify whether Ts is greater than Tp, and whether Tp is less than T3.

[0194] If not, execute step S416; if so, execute step S418.

[0195] S416, execute the seventh processing flow.

[0196] The seventh processing flow includes: opening the second outlet of the first three-way valve, the second outlet of the second three-way valve, the second cut-off valve, the fan of the fourth heat exchanger, the first circulation water pump and the second circulation water pump, and adjusting the rotation speeds of the fan of the fourth heat exchanger, the first circulation water pump and the second circulation water pump respectively.

[0197] In the embodiment of the present application, after executing the fifth processing flow, if T6≥Ti, it indicates that the temperature of the coolant flowing out of the second heat exchanger is relatively high at this time, and the hydrogen preheating heat exchanger, the first heat exchanger and the atmospheric environment cannot meet the cooling requirements of coolant A. If Ts≤Tp, and / or Tp≥T3, it indicates that the actual temperature of the vehicle cockpit is relatively high at this time, and the first heat exchanger cannot be used to cool coolant A, then execute the seventh processing flow.

[0198] In the embodiment of the present application, after executing the sixth processing flow, if T6≥Ti, it indicates that the temperature of the coolant flowing out of the second heat exchanger is relatively high at this time, and the hydrogen preheating heat exchanger and the atmospheric environment cannot meet the cooling requirements of coolant A. If Ts≤Tp, and / or Tp≥T3, it indicates that the actual temperature of the vehicle cockpit is relatively high at this time, and the first heat exchanger cannot be used to cool coolant A, then execute the seventh processing flow.

[0199] It can be understood that by executing the seventh processing flow, the fourth circuit of coolant A and the circuit of coolant C can be connected, the coolant C can be cooled by the third heat exchanger, and the coolant A can be cooled by the second heat exchanger, so that the atmospheric environment can be used to cool the coolant A to reduce the temperature of the coolant A.

[0200] The seventh processing flow may be executed to open the fifth circuit of the coolant A, and the coolant A may be cooled by a fan to reduce the temperature of the coolant A.

[0201] In one embodiment, adjusting the speed of the fan of the fourth heat exchanger includes adjusting the speed of the fan of the fourth heat exchanger based on the deviation between the first coolant temperature and the second set temperature. Thus, the speed of the fan of the fourth heat exchanger can be adjusted taking into account the deviation between the coolant temperature entering the battery stack and the second set temperature.

[0202] Exemplarily, the deviation between T1 and Ti includes the difference between Ti and T1.

[0203] Exemplarily, the deviation between T1 and Ti is positively correlated with the rotation speed of the fan of the fourth heat exchanger.

[0204] It should be noted that, for the relevant contents of adjusting the rotation speed of the fan of the fourth heat exchanger based on the deviation between T1 and Ti, reference can be made to the relevant contents of adjusting the rotation speed of the first circulating water pump based on the deviation between T1 and T2 in the above embodiment, which will not be repeated here.

[0205] S417, identify whether T1 is greater than Ti.

[0206] If yes, execute step S420; if no, return to execute step S411 and its subsequent steps.

[0207] It is understandable that after executing the seventh processing flow, if T1>Ti, it indicates that the temperature of the coolant flowing into the battery stack is high at this time, the hydrogen preheating heat exchanger, the atmospheric environment, and the fan cannot meet the cooling demand of the coolant A, and the battery stack temperature control fails, then the battery stack is shut down.

[0208] On the contrary, if T1≤Ti, it indicates that the temperature of the coolant flowing into the battery stack is low at this time, and there is no need to continue to use the fan to cool the coolant A, then the fifth processing flow and its subsequent steps are returned to continue to use the hydrogen preheating heat exchanger, the first heat exchanger and the atmospheric environment to cool the coolant A.

[0209] S418, execute the eighth processing flow.

[0210] The eighth processing flow includes: opening the second outlet of the first three-way valve, the second outlet of the second three-way valve, the first stop valve, the second stop valve, the fan of the fourth heat exchanger, the first circulating water pump, and the second circulating water pump, and adjusting the rotational speeds of the fan of the fourth heat exchanger, the first circulating water pump, and the second circulating water pump respectively.

[0211] In an embodiment of the present application, after the fifth processing flow is executed, if T6≥Ti, it indicates that the temperature of the coolant flowing out of the second heat exchanger is relatively high at this time, and the hydrogen preheating heat exchanger, the first heat exchanger, and the atmospheric environment cannot meet the cooling requirements of coolant A. If Ts>Tp and Tp<T3, it indicates that the actual temperature of the vehicle cockpit is relatively low at this time, and the first heat exchanger can continue to be used to cool coolant A, and then the eighth processing flow is executed.

[0212] In an embodiment of the present application, after the sixth processing flow is executed, if T6≥Ti, it indicates that the temperature of the coolant flowing out of the second heat exchanger is relatively high at this time, and the hydrogen preheating heat exchanger and the atmospheric environment cannot meet the cooling requirements of coolant A. If Ts>Tp and Tp<T3, it indicates that the actual temperature of the vehicle cockpit is relatively low at this time, and the first heat exchanger can be used to cool coolant A, and then the eighth processing flow is executed.

[0213] It can be understood that by executing the eighth processing flow, the third circuit of coolant A and the circuit of coolant B can be conducted, and coolant A can be cooled by the hydrogen preheating heat exchanger and the first heat exchanger to reduce the temperature of coolant A.

[0214] By executing the eighth processing flow, the fourth circuit of coolant A and the circuit of coolant C can also be conducted. Coolant C can be cooled by the third heat exchanger, and coolant A can be cooled by the second heat exchanger, so that the atmospheric environment can be used to cool coolant A to reduce the temperature of coolant A.

[0215] By executing the eighth processing flow, the fifth circuit of coolant A can also be conducted, and coolant A can be cooled by the fan to reduce the temperature of coolant A.

[0216] S419, identify whether T1 is greater than Ti.

[0217] If so, execute step S420; if not, return to execute step S408 and its subsequent steps.

[0218] S420, turn off the fuel cell stack.

[0219] It can be understood that after the eighth processing flow is executed, if T1>Ti, it indicates that the temperature of the coolant flowing into the fuel cell stack is relatively high at this time, and the hydrogen preheating heat exchanger, the first heat exchanger, the atmospheric environment, and the fan cannot meet the cooling requirements of coolant A, and the temperature control of the fuel cell stack fails, so the fuel cell stack is turned off.

[0220] On the contrary, if T1≤Ti, indicating that the temperature of the coolant flowing into the battery stack is low at this time, the process returns to execute the identification of whether Ts is greater than Tp, and whether Tp is less than T3 and subsequent steps to re-identify whether the first heat exchanger is used to cool the coolant A.

[0221] In summary, according to the thermal management method for a battery stack of an embodiment of the present application, when the first coolant temperature at the coolant inlet of the battery stack is greater than the second set temperature, at least one of the third to eighth processing flows may be executed, that is, different devices are used to cool the coolant used to cool the battery stack, thereby achieving graded cooling of the coolant used to cool the battery stack.

[0222] Among them, the third processing flow is executed to cool the coolant used to cool the battery stack through the hydrogen preheating heat exchanger and the water storage tank, the fourth processing flow is executed to cool the coolant used to cool the battery stack through the hydrogen preheating heat exchanger and the first heat exchanger, the fifth processing flow is executed to cool the coolant used to cool the battery stack through the hydrogen preheating heat exchanger, the first heat exchanger, and the atmospheric environment, the sixth processing flow is executed to cool the coolant used to cool the battery stack through the hydrogen preheating heat exchanger and the atmospheric environment, the seventh processing flow is executed to cool the coolant used to cool the battery stack through the hydrogen preheating heat exchanger, the atmospheric environment and the fan, and the eighth processing flow is executed to cool the coolant used to cool the battery stack through the hydrogen preheating heat exchanger, the first heat exchanger, the atmospheric environment and the fan.

[0223] For ease of understanding, an exemplary embodiment is provided:

[0224] In this embodiment, a certain vehicle-mounted fuel cell stack is taken as an example, the idle warm-up condition is 56.4A, and the target temperature is 50°C. During the normal operation of the fuel cell, the temperature is 50-80°C. The heat storage temperature of the hot water storage tank 10 is maintained in the range of 50-80°C. When the vehicle-mounted fuel cell stack is shut down for a period of time after the last operation, the fuel cell stack system is started again, and the following is executed: Figure 5 The battery stack thermal management method shown:

[0225] S1: Obtain the general starting temperature of the fuel cell stack T0 ≥ 0°C, the coolant temperature at the fuel cell stack inlet T1 = 8°C, the coolant temperature at the fuel cell stack opening (also called outlet) T2 = 8°C, the coolant temperature at the first opening of the hydrogen preheating heat exchanger 13 T3 = 8°C, the set temperature of the vehicle passenger space Ts = 26°C, the actual temperature of the vehicle passenger space Tp = 15°C, the coolant temperature of the water storage tank 10 T4 = 60°C; the first opening temperature of the first heat exchanger 9 T5 = 8°C, the first opening temperature of the second heat exchanger 5 T6 = 8°C. The coolant temperature at the inlet of the fuel cell stack is provided by temperature sensor 15, the coolant temperature at the opening of the fuel cell stack is provided by temperature sensor 16, the coolant temperature at the first opening of the hydrogen preheating heat exchanger is provided by temperature sensor 17, the temperature of the hot water storage tank is provided by temperature sensor 18, the first opening temperature of the first heat exchanger is provided by temperature sensor 19, the first opening temperature of the second heat exchanger is provided by temperature sensor 20, the actual temperature of the vehicle passenger space is provided by temperature sensor 21, and the general starting temperature T0 of the fuel cell stack is provided by the fuel cell stack supplier.

[0226] S2: Determine whether T1≥T0; if "yes", execute S21: start the fuel cell stack system; if "no", execute S20: open the second opening of the first three-way valve 12, open the first opening of the second three-way valve 11, open the first circulation pump 2 (i.e., the first circulation water pump) and adjust the speed; at this time, use the hot water in the hot water storage tank 10 to heat the stack and the pipeline along the way until T3≥T0, and then execute S21. Then, enter the next step S22: Determine whether T1>Ti; if "yes", execute S4; if "no", execute S3.

[0227] S3: Determine whether T1≥T4. If it is "yes", execute S31: open the first opening of the first three-way valve 12, open the first circulation pump 2 and adjust the speed. At this time, in order to increase the temperature of the coolant in the battery stack and the pipeline as quickly as possible, the coolant only passes through the first opening of the first three-way valve 12. If it is "no", execute S32: open the first circulation pump 2 and adjust the speed, open the first three-way valve 12 and adjust the first and second openings, and open the first opening of the second three-way valve 11; it means that the temperature of the coolant stored after the last operation of the battery stack is higher than the coolant temperature when the battery stack is started. The heat stored in the hot water storage tank during the last operation of the battery stack can quickly increase the temperature of the coolant in the battery stack and the circulating loop.

[0228] S4: If T1>T4 is judged, if it is "yes", then S32 is executed. At this time, the temperature of the coolant flowing through the battery stack is higher than the temperature of the coolant stored in the water tank when the battery stack was last operated. The water tank coolant can be used to quickly cool down the battery stack and the circulating loop coolant. If it is "no", then S40 is executed. S40: If Ts>Tp&Tp<T3 is judged, if it is "yes", then S41 is executed, the first stop valve 8 is opened, the second opening of the first three-way valve 12 is opened, the second opening of the second three-way valve 11 is opened, the first circulation pump 2 is opened and the speed is adjusted. If it is "no", then S42 is executed, the second stop valve 7 is opened, the second opening of the first three-way valve 12 is opened, the second opening of the second three-way valve 11 is opened, the first circulation pump 2 and the second circulation pump 4 are opened and the speed is adjusted. Then enter the next step S43: If T6≥Ti is judged, if it is "yes", then S6 is executed; if it is "no", then S22 is executed.

[0229] S5: Determine T5 ≥ Ti. If it is "No", execute S22. If it is "Yes", execute S50: open the second opening of the first three-way valve 12, open the second opening of the second three-way valve 11, open the second stop valve 7, open the first stop valve 8, open the first circulation pump 2 and the second circulation pump 4, and adjust the speed. Then, enter the next step S51: Determine T6 ≥ Ti. If it is "No", execute S41, and if it is "Yes", execute S6.

[0230] S6: Determine whether Ts>Tp&Tp<T3. If "yes", open the second opening of the first three-way valve 12, open the second opening of the second three-way valve 11, open the second stop valve 7, open the first stop valve 8, turn on the fan of the fourth radiator 3 and adjust the speed, turn on the first circulation pump 2 and the second circulation pump 4 and adjust the speed; if "no", open the second opening of the first three-way valve 12, open the second opening of the second three-way valve 11, open the second stop valve 7, turn on the fan of the fourth radiator 3 and adjust the speed, turn on the first circulation pump 2 and the second circulation pump 4 and adjust the speed.

[0231] S71: If T1>Ti is determined, if it is "yes", the temperature control of the battery stack system fails and the operation is terminated; if it is "no", S50 is executed;

[0232] S72: If it is determined that T1>Ti, if it is "yes", the temperature control of the battery stack system fails and the operation is terminated; if it is "no", execute S40.

[0233] In order to implement the above-mentioned embodiments, the present application also proposes a battery stack thermal management device.

[0234] Figure 6 A schematic diagram of the structure of a battery stack thermal management device provided in an embodiment of the present application.

[0235] like Figure 6As shown, the battery stack thermal management device 200 includes: an identification module 210 , a start module 220 and an execution module 230 .

[0236] An identification module 210 is used to identify whether a first coolant temperature at a coolant inlet of the battery electric propulsion is greater than or equal to a first set temperature;

[0237] A starting module 220, configured to start the battery stack in response to the first coolant temperature being greater than or equal to the first set temperature;

[0238] The execution module 230 is used to execute a first processing flow in response to the first coolant temperature being lower than the first set temperature; wherein:

[0239] The first processing flow includes: continuing to close the battery stack, opening the second outlet of the first three-way valve, the first outlet of the second three-way valve and the first circulating water pump, and adjusting the rotation speed of the first circulating water pump.

[0240] Furthermore, in a possible implementation of an embodiment of the present application, after executing the first processing flow, the execution module 230 is also used to: identify whether the third coolant temperature at the coolant outlet of the hydrogen preheating heat exchanger is greater than or equal to the first set temperature; in response to the third coolant temperature being greater than or equal to the first set temperature, start the battery stack; in response to the third coolant temperature being less than the first set temperature, return to execute the first processing flow and its subsequent steps.

[0241] Further, in a possible implementation of the embodiment of the present application, after starting the battery stack, the execution module 230 is further used to: identify whether the first coolant temperature is greater than the second set temperature; in response to the first coolant temperature being less than or equal to the second set temperature, identify whether the first coolant temperature is greater than or equal to the fourth coolant temperature inside the energy storage water tank; in response to the first coolant temperature being greater than or equal to the fourth coolant temperature, execute a second processing flow; wherein the second processing flow includes: opening the first outlet of the first three-way valve and the first circulating water pump, and adjusting the speed of the first circulating water pump;

[0242] After executing the second processing flow, the execution module 230 is also used to: return to execute the identification of whether the first coolant temperature is greater than the second set temperature and subsequent steps.

[0243] Further, in a possible implementation of the embodiment of the present application, the execution module 230 is further used to: in response to the first coolant temperature being lower than the fourth coolant temperature, execute a third processing flow; wherein the third processing flow includes: opening the first outlet of the first three-way valve, the second outlet of the first three-way valve, the first outlet of the second three-way valve, and the first circulating water pump, adjusting the opening of at least one of the first outlet of the first three-way valve and the second outlet of the first three-way valve, and adjusting the speed of the first circulating water pump;

[0244] After executing the third processing flow, the execution module 230 is also used to: execute and return to execute the identification of whether the first coolant temperature is greater than the second set temperature and subsequent steps.

[0245] Furthermore, in a possible implementation of the embodiment of the present application, the execution module 230 is also used to: in response to the first coolant temperature being greater than the second set temperature, identify whether the first coolant temperature is greater than the fourth coolant temperature; in response to the first coolant temperature being greater than the fourth coolant temperature, execute the third processing flow.

[0246] Further, in a possible implementation of the embodiment of the present application, the system further includes a first heat exchanger and a first stop valve;

[0247] The execution module 230 is also used to: in response to the first coolant temperature being less than or equal to the fourth coolant temperature, identify whether the third set temperature of the vehicle cabin is greater than the seventh coolant temperature of the second outlet of the first heat exchanger, and whether the seventh coolant temperature is less than the third coolant temperature of the coolant outlet of the hydrogen preheating heat exchanger; in response to the third set temperature being greater than the seventh coolant temperature, and the seventh coolant temperature being less than the third coolant temperature, execute a fourth processing flow; wherein the fourth processing flow includes: opening the second outlet of the first three-way valve, the second outlet of the second three-way valve, the first stop valve and the first circulating water pump, and adjusting the speed of the first circulating water pump.

[0248] Further, in a possible implementation of the embodiment of the present application, the system further includes a second heat exchanger, a third heat exchanger, a second stop valve and a second circulating water pump;

[0249] After executing the fourth processing flow, the execution module 230 is also used to: identify whether the fifth coolant temperature at the first outlet of the first heat exchanger is greater than or equal to the second set temperature; in response to the fifth coolant temperature being greater than or equal to the second set temperature, execute the fifth processing flow; wherein the fifth processing flow includes: opening the second outlet of the first three-way valve, the second outlet of the second three-way valve, the first stop valve, the second stop valve, the first circulating water pump and the second circulating water pump, and adjusting the respective speeds of the first circulating water pump and the second circulating water pump; in response to the fifth coolant temperature being less than the second set temperature, return to execute the identification of whether the first coolant temperature is greater than the second set temperature and its subsequent steps.

[0250] Further, in a possible implementation of the embodiment of the present application, the system further includes a second heat exchanger, a third heat exchanger, a second stop valve and a second circulating water pump;

[0251] The execution module 230 is also used to: in response to the third set temperature being less than or equal to the seventh coolant temperature, and / or the seventh coolant temperature being greater than or equal to the third coolant temperature, execute a sixth processing flow; wherein the sixth processing flow includes: opening the second outlet of the first three-way valve, the second outlet of the second three-way valve, the second stop valve, the first circulating water pump and the second circulating water pump, and adjusting the respective speeds of the first circulating water pump and the second circulating water pump.

[0252] Further, in a possible implementation of the embodiment of the present application, the system further includes a fourth heat exchanger;

[0253] After executing any one of the fifth processing flow or the sixth processing flow, the execution module 230 is also used to: identify whether the sixth coolant temperature at the first outlet of the second heat exchanger is greater than or equal to the second set temperature; in response to the sixth coolant temperature being greater than or equal to the second set temperature, re-identify whether the third set temperature is greater than the seventh coolant temperature, and whether the seventh coolant temperature is less than the third coolant temperature; in response to the third set temperature being less than or equal to the seventh coolant temperature, and / or the seventh coolant temperature being greater than or equal to the third coolant temperature, execute the seventh processing flow; wherein,

[0254] The seventh processing flow includes: opening the second outlet of the first three-way valve, the second outlet of the second three-way valve, the second stop valve, the fan of the fourth heat exchanger, the first circulating water pump and the second circulating water pump, and adjusting the speeds of the fan of the fourth heat exchanger, the first circulating water pump and the second circulating water pump.

[0255] Furthermore, in a possible implementation of an embodiment of the present application, after executing the seventh processing flow, the execution module 230 is also used to: identify whether the first coolant temperature is greater than the second set temperature; in response to the first coolant temperature being greater than the second set temperature, shut down the battery stack; in response to the first coolant temperature being less than or equal to the second set temperature, return to execute the fifth processing flow and its subsequent steps.

[0256] Furthermore, in a possible implementation of an embodiment of the present application, the execution module 230 is also used to: in response to the third set temperature being greater than the seventh coolant temperature, and the seventh coolant temperature being less than the third coolant temperature, execute an eighth processing flow; wherein the eighth processing flow includes: opening the second outlet of the first three-way valve, the second outlet of the second three-way valve, the first stop valve, the second stop valve, the fan of the fourth heat exchanger, the first circulating water pump and the second circulating water pump, and adjusting the speeds of the fan of the fourth heat exchanger, the first circulating water pump and the second circulating water pump.

[0257] Furthermore, in a possible implementation of an embodiment of the present application, after executing the eighth processing flow, the execution module 230 is also used to: identify whether the first coolant temperature is greater than the second set temperature; in response to the first coolant temperature being greater than the second set temperature, shut down the battery stack; in response to the first coolant temperature being less than or equal to the second set temperature, return to execute the step of identifying whether the third set temperature of the vehicle cabin is greater than the seventh coolant temperature of the second outlet of the first heat exchanger, and whether the seventh coolant temperature is less than the third coolant temperature of the coolant outlet of the hydrogen preheating heat exchanger and its subsequent steps.

[0258] Further, in a possible implementation of an embodiment of the present application, the execution module 230 is also used to: in response to the sixth coolant temperature being less than the second set temperature, and any one of the processes is the fifth processing process, return to execute the fourth processing process and its subsequent steps; in response to the sixth coolant temperature being less than the second set temperature, and any one of the processes is the sixth processing process, return to execute the identification of whether the first coolant temperature is greater than the second set temperature and its subsequent steps.

[0259] Furthermore, in a possible implementation of an embodiment of the present application, the execution module 230 is also used to: obtain the sixth coolant temperature of the first outlet of the second heat exchanger; and adjust the speed of the second circulating water pump based on the deviation between the sixth coolant temperature and the second set temperature.

[0260] Furthermore, in a possible implementation of the embodiment of the present application, the execution module 230 is also used to: adjust the speed of the fan of the fourth heat exchanger based on the deviation between the first coolant temperature and the second set temperature.

[0261] Furthermore, in a possible implementation of the embodiment of the present application, the execution module 230 is also used to: obtain a second coolant temperature at the coolant outlet of the battery electric propulsion; and adjust the rotation speed of the first circulating water pump based on the deviation between the first coolant temperature and the second coolant temperature.

[0262] It should be noted that the aforementioned explanation of the embodiment of the battery stack thermal management method is also applicable to the battery stack thermal management device of this embodiment, and will not be repeated here.

[0263] In summary, the battery stack thermal management device of the embodiment of the present application directly starts the battery stack when the first coolant temperature at the coolant inlet of the battery electric propulsion is greater than or equal to the first set temperature, and executes the first processing flow when the first coolant temperature is less than the first set temperature to heat the coolant used to cool the battery stack through the heat storage tank, thereby improving the cooling speed of the coolant. In addition, the heat storage tank does not require electricity and the circulating water pump consumes less power, which helps to improve energy utilization efficiency and can achieve rapid start-up of the battery stack. It is suitable for thermal management scenarios of on-board fuel cell stacks.

[0264] In order to implement the above embodiments, the present application also proposes an electronic device, comprising: a processor, and a memory communicatively connected to the processor; the memory stores computer-executable instructions; the processor executes the computer-executable instructions stored in the memory to implement the battery stack thermal management method provided in the above embodiments.

[0265] In order to implement the above embodiments, the present application also proposes a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the battery stack thermal management method provided in the above embodiments.

[0266] In order to implement the above embodiments, the present application also proposes a computer program product, including a computer program, which, when executed by a processor, implements the battery stack thermal management method provided by the above embodiments.

[0267] The collection, storage, use, processing, transmission, provision and disclosure of user personal information involved in this application are in compliance with relevant laws and regulations and do not violate public order and good morals.

[0268] It should be noted that personal information from users should be collected for legitimate and reasonable purposes and should not be shared or sold outside of these legitimate uses. In addition, such collection / sharing should be carried out after receiving the user's informed consent, including but not limited to notifying the user to read the user agreement / user notice and sign the agreement / authorization including authorization of relevant user information before the user uses the function. In addition, any necessary steps should be taken to protect and safeguard access to such personal information data and ensure that others who have access to personal information data comply with its privacy policy and procedures.

[0269] The present application is expected to provide an implementation scheme for users to selectively block the use or access of personal information data. That is, the present disclosure is expected to provide hardware and / or software to prevent or block access to such personal information data. Once the personal information data is no longer needed, the risk can be minimized by limiting data collection and deleting the data. In addition, when applicable, such personal information is de-identified to protect the privacy of the user.

[0270] In the description of the aforementioned embodiments, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0271] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood to control or imply relative importance or implicitly indicate the number of technical features controlled. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0272] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0273] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute the instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purpose of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0274] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0275] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0276] In addition, each functional unit in each embodiment of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0277] The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A battery stack thermal management system, characterized in that: include: Battery stack, first circulating water pump, hydrogen preheating heat exchanger, air radiator, hot water storage tank, first three-way valve and second three-way valve; wherein, The outlet of the first circulating water pump is connected to the coolant inlet of the battery stack, the coolant outlet of the battery stack is connected to the coolant inlet of the air radiator, the coolant outlet of the air radiator is connected to the coolant inlet of the hydrogen preheating heat exchanger, the coolant outlet of the hydrogen preheating heat exchanger is connected to the inlet of the first three-way valve, and the first outlet of the first three-way valve is connected to the coolant inlet of the first circulating water pump; The hydrogen inlet of the hydrogen preheating heat exchanger is connected to the hydrogen outlet of the hydrogen supplier, and the hydrogen outlet of the hydrogen heat exchanger is connected to the hydrogen inlet of the battery stack; The air inlet of the air radiator is connected to the air outlet of the air supplier, and the air outlet of the air radiator is connected to the air inlet of the battery stack; The second outlet of the first three-way valve is connected to the inlet of the second three-way valve, the first outlet of the second three-way valve is connected to the inlet of the hot water storage tank, and the outlet of the hot water storage tank is connected to the inlet of the first circulating water pump.

2. The system according to claim 1, characterized in that Also includes: The first heat exchanger and the first stop valve; wherein, The second outlet of the second three-way valve is connected to the first inlet of the first heat exchanger, the first outlet of the first heat exchanger is connected to the inlet of the first circulating water pump, and the first inlet of the first heat exchanger is connected to the first outlet of the first heat exchanger; The outlet of the heating pipe of the vehicle cabin is connected to the inlet of the first stop valve, the outlet of the first stop valve is connected to the second inlet of the first heat exchanger, the second outlet of the first heat exchanger is connected to the inlet of the heating pipe of the vehicle cabin, and the second inlet of the first heat exchanger is connected to the second outlet of the first heat exchanger.

3. The system according to claim 2, characterized in that Also includes: The second heat exchanger, the third heat exchanger, the second stop valve and the second circulating water pump; wherein, The first outlet of the first heat exchanger is connected to the first inlet of the second heat exchanger, the first outlet of the second heat exchanger is connected to the inlet of the first circulating water pump, and the first inlet of the second heat exchanger is connected to the first outlet of the second heat exchanger; The outlet of the second circulating water pump is connected to the second inlet of the second heat exchanger, the second outlet of the second heat exchanger is connected to the inlet of the second stop valve, the second inlet of the second heat exchanger is connected to the second outlet of the second heat exchanger, the outlet of the second stop valve is connected to the inlet of the third heat exchanger, and the outlet of the third heat exchanger is connected to the inlet of the second circulating water pump; The air outside the vehicle may flow through the third heat exchanger.

4. The system according to claim 3, characterized in that Also includes: The fourth heat exchanger includes a fan; wherein, The first outlet of the second heat exchanger is connected to the inlet of the fourth heat exchanger, and the outlet of the fourth heat exchanger is connected to the first circulating water pump.

5. The system according to claim 3, characterized in that Also includes: A first temperature sensor, located at a coolant inlet of the battery stack, for detecting a first coolant temperature at the coolant inlet of the battery stack; A second temperature sensor, located at the coolant outlet of the battery stack, for detecting a second coolant temperature at the coolant outlet of the battery stack; A third temperature sensor is located at the coolant outlet of the hydrogen preheating heat exchanger and is used to detect a third coolant temperature at the coolant outlet of the hydrogen preheating heat exchanger; a fourth temperature sensor, located inside the energy storage water tank, and used to detect a fourth coolant temperature inside the energy storage water tank; a fifth temperature sensor, located at the first outlet of the first heat exchanger, and used to detect a fifth coolant temperature at the first outlet of the first heat exchanger; a sixth temperature sensor, located at the first outlet of the second heat exchanger, and used to detect a sixth coolant temperature at the first outlet of the second heat exchanger; The seventh temperature sensor is located at the second outlet of the first heat exchanger and is used to detect a seventh coolant temperature at the second outlet of the first heat exchanger.

6. A battery stack thermal management method, characterized in that: Applicable to a battery stack thermal management system according to any one of claims 1 to 5, the method comprising: Identify whether a first coolant temperature of a coolant inlet of the battery electric propulsion is greater than or equal to a first set temperature; In response to the first coolant temperature being greater than or equal to the first set temperature, starting the battery stack; In response to the first coolant temperature being lower than the first set temperature, a first processing flow is executed; wherein, The first processing flow includes: continuing to close the battery stack, opening the second outlet of the first three-way valve, the first outlet of the second three-way valve and the first circulating water pump, and adjusting the rotation speed of the first circulating water pump.

7. The method according to claim 6, characterized in that After executing the first processing flow, the method further includes: Identify whether the third coolant temperature at the coolant outlet of the hydrogen preheating heat exchanger is greater than or equal to the first set temperature; In response to the third coolant temperature being greater than or equal to the first set temperature, starting the battery stack; In response to the third coolant temperature being lower than the first set temperature, the first processing flow and subsequent steps thereof are returned to be executed.

8. The method according to claim 6, characterized in that After starting the battery stack, the method further includes: identifying whether the first coolant temperature is greater than a second set temperature; In response to the first coolant temperature being less than or equal to the second set temperature, identifying whether the first coolant temperature is greater than or equal to a fourth coolant temperature inside the energy storage water tank; In response to the first coolant temperature being greater than or equal to the fourth coolant temperature, executing a second processing flow; wherein, The second processing flow includes: opening the first outlet of the first three-way valve and the first circulating water pump, and adjusting the speed of the first circulating water pump; After the second processing flow is executed, the method further includes: Return to execute the step of identifying whether the first coolant temperature is greater than the second set temperature and subsequent steps.

9. The method according to claim 8, characterized in that The method further comprises: In response to the first coolant temperature being lower than the fourth coolant temperature, a third processing flow is executed; wherein, The third processing flow comprises: opening the first outlet of the first three-way valve, the second outlet of the first three-way valve, the first outlet of the second three-way valve, and the first circulating water pump, adjusting the opening degree of at least one of the first outlet of the first three-way valve and the second outlet of the first three-way valve, and adjusting the rotation speed of the first circulating water pump; After executing the third processing flow, the method further includes: The execution returns to execute the step of identifying whether the first coolant temperature is greater than the second set temperature and subsequent steps.

10. The method according to claim 8, characterized in that The method further comprises: In response to the first coolant temperature being greater than the second set temperature, identifying whether the first coolant temperature is greater than the fourth coolant temperature; In response to the first coolant temperature being greater than the fourth coolant temperature, the third processing flow is executed.

11. The method according to claim 10, characterized in that The system also includes a first heat exchanger and a first stop valve; The method further comprises: In response to the first coolant temperature being less than or equal to the fourth coolant temperature, identifying whether a third set temperature of the vehicle cabin is greater than a seventh coolant temperature at the second outlet of the first heat exchanger, and whether the seventh coolant temperature is less than a third coolant temperature at the coolant outlet of the hydrogen preheating heat exchanger; In response to the third set temperature being greater than the seventh coolant temperature, and the seventh coolant temperature being less than the third coolant temperature, a fourth processing flow is executed; wherein, The fourth processing flow includes: opening the second outlet of the first three-way valve, the second outlet of the second three-way valve, the first stop valve and the first circulating water pump, and adjusting the rotation speed of the first circulating water pump.

12. The method according to claim 11, characterized in that The system also includes a second heat exchanger, a third heat exchanger, a second stop valve and a second circulating water pump; After the fourth processing flow is executed, the method further includes: identifying whether a fifth coolant temperature at a first outlet of the first heat exchanger is greater than or equal to the second set temperature; In response to the fifth coolant temperature being greater than or equal to the second set temperature, a fifth processing flow is executed; wherein, The fifth processing flow comprises: opening the second outlet of the first three-way valve, the second outlet of the second three-way valve, the first stop valve, the second stop valve, the first circulating water pump and the second circulating water pump, and adjusting the rotation speeds of the first circulating water pump and the second circulating water pump; In response to the fifth coolant temperature being less than the second set temperature, the process returns to executing the step of identifying whether the first coolant temperature is greater than the second set temperature and subsequent steps.

13. The method according to claim 11, characterized in that The system also includes a second heat exchanger, a third heat exchanger, a second stop valve and a second circulating water pump; The method further comprises: In response to the third set temperature being less than or equal to the seventh coolant temperature, and / or the seventh coolant temperature being greater than or equal to the third coolant temperature, a sixth processing flow is executed; wherein, The sixth processing flow includes: opening the second outlet of the first three-way valve, the second outlet of the second three-way valve, the second stop valve, the first circulating water pump and the second circulating water pump, and adjusting the rotation speeds of the first circulating water pump and the second circulating water pump.

14. The method according to claim 12 or 13, characterized in that The system also includes a fourth heat exchanger; After executing any one of the fifth processing flow or the sixth processing flow, the method further includes: identifying whether a sixth coolant temperature at a first outlet of the second heat exchanger is greater than or equal to the second set temperature; In response to the sixth coolant temperature being greater than or equal to the second set temperature, re-identifying whether the third set temperature is greater than the seventh coolant temperature, and whether the seventh coolant temperature is less than the third coolant temperature; In response to the third set temperature being less than or equal to the seventh coolant temperature, and / or the seventh coolant temperature being greater than or equal to the third coolant temperature, a seventh processing flow is executed; wherein, The seventh processing flow includes: opening the second outlet of the first three-way valve, the second outlet of the second three-way valve, the second stop valve, the fan of the fourth heat exchanger, the first circulating water pump and the second circulating water pump, and adjusting the speeds of the fan of the fourth heat exchanger, the first circulating water pump and the second circulating water pump.

15. The method according to claim 14, characterized in that After the seventh processing flow is executed, the method further includes: identifying whether the first coolant temperature is greater than the second set temperature; In response to the first coolant temperature being greater than the second set temperature, shutting down the battery stack; In response to the first coolant temperature being less than or equal to the second set temperature, returning to execute the fifth processing flow and subsequent steps thereof.

16. The method according to claim 14, characterized in that The method further comprises: In response to the third set temperature being greater than the seventh coolant temperature, and the seventh coolant temperature being less than the third coolant temperature, an eighth processing flow is executed; wherein, The eighth processing flow includes: opening the second outlet of the first three-way valve, the second outlet of the second three-way valve, the first stop valve, the second stop valve, the fan of the fourth heat exchanger, the first circulating water pump and the second circulating water pump, and adjusting the respective speeds of the fan of the fourth heat exchanger, the first circulating water pump and the second circulating water pump.

17. The method according to claim 16, characterized in that After the eighth processing flow is executed, the method further includes: identifying whether the first coolant temperature is greater than the second set temperature; In response to the first coolant temperature being greater than the second set temperature, shutting down the battery stack; In response to the first coolant temperature being less than or equal to the second set temperature, the step of returning to execute the step of identifying whether the third set temperature of the vehicle cabin is greater than the seventh coolant temperature of the second outlet of the first heat exchanger, and whether the seventh coolant temperature is less than the third coolant temperature of the coolant outlet of the hydrogen preheating heat exchanger and its subsequent steps.

18. The method according to claim 14, characterized in that The method further comprises: In response to the sixth coolant temperature being less than the second set temperature, and the any one of the processes is the fifth processing process, returning to execute the fourth processing process and subsequent steps thereof; In response to the sixth coolant temperature being less than the second set temperature, and any one of the processes is the sixth processing process, the step of identifying whether the first coolant temperature is greater than the second set temperature and subsequent steps is returned to be executed.

19. The method according to claim 12 or 13, characterized in that: Adjusting the speed of the second circulating water pump comprises: acquiring a sixth coolant temperature at a first outlet of the second heat exchanger; Based on the deviation between the sixth coolant temperature and the second set temperature, the rotation speed of the second circulating water pump is adjusted.

20. The method according to claim 14, characterized in that Adjusting the speed of the fan of the fourth heat exchanger includes: The rotation speed of the fan of the fourth heat exchanger is adjusted based on the deviation between the first coolant temperature and the second set temperature.

21. The method according to any one of claims 6 to 13, characterized in that: The adjusting the rotation speed of the first circulating water pump comprises: Acquire a second coolant temperature at a coolant outlet of the battery electric propulsion; Based on the deviation between the first coolant temperature and the second coolant temperature, the rotation speed of the first circulating water pump is adjusted.

22. A battery stack thermal management device, characterized in that: Applicable to a battery stack thermal management system according to any one of claims 1 to 5, the device comprising: An identification module, used to identify whether a first coolant temperature at a coolant inlet of the battery electric propulsion is greater than or equal to a first set temperature; a starting module, configured to start the battery stack in response to the first coolant temperature being greater than or equal to the first set temperature; An execution module is used to execute a first processing flow in response to the first coolant temperature being lower than the first set temperature; wherein, The first processing flow includes: continuing to close the battery stack, opening the second outlet of the first three-way valve, the first outlet of the second three-way valve and the first circulating water pump, and adjusting the rotation speed of the first circulating water pump.

23. An electronic device, characterized in that: include: A processor, and a memory communicatively connected to the processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the method according to any one of claims 6 to 21.

24. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, which are used to implement the method according to any one of claims 6 to 21 when executed by a processor.

25. A computer program product, characterized in that The method comprises a computer program, which, when executed by a processor, implements the method according to any one of claims 6 to 21.

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