A fuel cell vehicle thermal management structure without ptc heating defrosting and demisting

Abstract

The present application relates to fuel cell vehicle thermal management technical field, especially to a kind of PTC heating defrosting and demisting's fuel cell whole vehicle thermal management structure.No including fuel cell thermal management circuit, power battery thermal management circuit, drive motor assembly thermal management circuit and cabin thermal management circuit;Power battery thermal management circuit is located in the inside of fuel cell thermal management circuit, drive motor assembly thermal management circuit is located at one end of power battery thermal management circuit, and cabin thermal management circuit is located at the outside of power battery thermal management circuit.The present application provides a kind of PTC heating defrosting and demisting's fuel cell whole vehicle thermal management structure, by the energy cascade utilization of fuel cell vehicle fuel cell thermal management, drive motor assembly thermal management, cabin thermal management each system;Avoid the situation of energy waste, to increase the use efficiency of fuel cell vehicle.

Description

Technical Field

[0001] This invention relates to the field of thermal management technology for fuel cell vehicles, and in particular to a thermal management structure for fuel cell vehicles that does not require PTC heating for defrosting and demisting. Background Technology

[0002] In today's environmental context, energy conservation and emission reduction have become an inevitable trend for the future. New energy vehicles are an important means to achieve these goals. Among them, fuel cell vehicles, which utilize hydrogen energy to generate electricity and achieve zero emissions, are key to the future development of new energy vehicles. However, existing fuel cell vehicle thermal management systems suffer from inefficient energy utilization and waste due to the slow reaction time of fuel cells, requiring the use of a power battery. Furthermore, hydrogen fuel cell vehicles typically rely on electric heaters for heating in winter and for continuous defrosting and defogging, which severely impacts vehicle energy consumption and driving range.

[0003] To address this issue, we designed a fuel cell vehicle thermal management structure that eliminates the need for PTC heating for defrosting and demisting, providing an alternative technical solution to the aforementioned problems. Summary of the Invention

[0004] Therefore, it is necessary to provide a fuel cell vehicle thermal management structure without PTC heating for defrosting and demisting, in order to solve the technical problems mentioned in the background.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A thermal management structure for a fuel cell vehicle without PTC heating for defrosting and demisting includes a fuel cell thermal management circuit, a power battery thermal management circuit, a drive motor assembly thermal management circuit, and an in-cabin thermal management circuit.

[0007] The power battery thermal management circuit is located inside the fuel cell thermal management circuit, the drive motor assembly thermal management circuit is located at one end of the power battery thermal management circuit, and the cabin thermal management circuit is located outside the power battery thermal management circuit.

[0008] The fuel cell thermal management circuit includes a first heat exchanger, a first three-way reversing valve, a second heat exchanger, a PTC heater, a first electric water pump, a five-way reversing valve, a second three-way reversing valve, and a third three-way reversing valve. One end of the first heat exchanger is connected to the first three-way reversing valve and the PTC heater, and the first three-way reversing valve is located at the top of the PTC heater. The bottom of the first three-way reversing valve is connected to the second heat exchanger. The bottom of the PTC heater is connected to the first electric water pump. One end of the first electric water pump is connected to the five-way reversing valve. The other end of the first heat exchanger is connected to the second three-way reversing valve. One end of the second three-way reversing valve is connected to the third three-way reversing valve.

[0009] As a preferred embodiment of the fuel cell vehicle thermal management structure without PTC heating for defrosting and demisting provided by the present invention, the fuel cell thermal management circuit includes a heater core and a defroster. The bottom of the second three-way reversing valve is connected to the heater core, and the bottom end of the heater core is connected to the five-way reversing valve. The bottom of the third three-way reversing valve is connected to the defroster, and the defroster is connected to the five-way reversing valve.

[0010] As a preferred embodiment of the fuel cell vehicle thermal management structure for PTC-free heating defrosting and demisting provided by the present invention, the fuel cell thermal management circuit includes a six-way reversing valve, a four-way reversing valve, a fuel cell, a fourth electronic water pump, a third expansion tank, a sixth three-way reversing valve, and a third radiator. One end of the third three-way reversing valve is connected to the four-way reversing valve, and one end of the four-way reversing valve is connected to the fuel cell. The bottom of the fuel cell is connected to the fourth electronic water pump, and the bottom of the fourth electronic water pump is connected to the third expansion tank. The bottom of the third expansion tank is connected to the sixth three-way reversing valve, and the sixth three-way reversing valve is connected to the second heat exchanger, as is the third expansion tank. One end of the sixth three-way reversing valve is connected to the six-way reversing valve, and one end of the six-way reversing valve is connected to the third radiator. The third radiator is connected to a five-way reversing valve.

[0011] As a preferred embodiment of the fuel cell vehicle thermal management structure without PTC heating for defrosting and demisting provided by the present invention, the power battery thermal management circuit includes a second expansion tank, a third electronic water pump, a power battery, and a second radiator. The bottom of the second expansion tank is connected to a six-way reversing valve, the top of the second expansion tank is connected to the third electronic water pump, the top of the third electronic water pump is connected to the power battery, the power battery is connected to a four-way reversing valve, and the bottom of the four-way reversing valve is connected to the second radiator.

[0012] As a preferred embodiment of the PTC-free heating defrosting and demisting thermal management structure for fuel cell vehicles provided by the present invention, the thermal management circuit of the drive motor assembly includes a fourth three-way reversing valve, a drive motor assembly, a first radiator, a second electronic water pump, a first expansion tank, and a fifth three-way reversing valve. The bottom of the fourth three-way reversing valve is connected to the drive motor assembly, the bottom of the drive motor assembly is connected to the second electronic water pump, the bottom of the second electronic water pump is connected to the first expansion tank, the bottom of the first expansion tank is connected to the fifth three-way reversing valve, the fifth three-way reversing valve is connected to a six-way reversing valve, one end of the fifth three-way reversing valve is connected to the first radiator, and the first radiator is connected to the fourth three-way reversing valve.

[0013] As a preferred embodiment of the fuel cell vehicle thermal management structure without PTC heating for defrosting and demisting provided by the present invention, the in-cabin thermal management circuit includes a compressor, a gas-liquid separator, a first electronic expansion valve, an outdoor heat exchanger, a second electronic expansion valve, an evaporator, and a third electronic expansion valve. One end of the compressor is connected to the first electronic expansion valve, which is connected to the first heat exchanger. The other end of the compressor is connected to the gas-liquid separator. One end of the gas-liquid separator is connected to both the evaporator and the third electronic expansion valve, with the evaporator located at one end of the third electronic expansion valve. The bottom of the evaporator is connected to the second electronic expansion valve, and both the second and third electronic expansion valves are connected to the outdoor heat exchanger via the second heat exchanger. The outdoor heat exchanger is connected to a first three-way reversing valve.

[0014] It is clear without a doubt that the technical solution described above in this application can solve the technical problem that this application aims to address.

[0015] Meanwhile, through the above technical solutions, the present invention has at least the following beneficial effects:

[0016] This invention provides a PTC-free heating defrosting and demisting thermal management structure for fuel cell vehicles, which enables the tiered utilization of energy in various systems such as fuel cell thermal management, drive motor component thermal management, and cabin thermal management; thus avoiding energy waste and increasing the efficiency of fuel cell vehicles.

[0017] While ensuring the thermal management requirements of each system, the PTC heater is used reasonably to overcome the cold start difficulties of fuel cell vehicles. Under the premise of ensuring passenger cabin comfort and stable fuel cell and motor temperatures, the coolant in the fuel cell thermal management circuit and the waste heat of the drive motor components are fully utilized to achieve passenger cabin heating in low-temperature environments and continuous defrosting and demisting of the defroster in winter without the PTC heater, thereby reducing energy consumption.

[0018] In low-temperature winter environments, while ensuring passenger cabin comfort and stable temperatures of fuel cells, power batteries, and motor components, the system can reduce the energy consumption of the thermal management system, fully utilize the waste heat from fuel cells and motor components, solve the problems of low heating efficiency of heat pump air conditioners in low-temperature environments and the large amount of electricity consumed by continuous defrosting and defogging in winter, and improve the driving range of fuel cell vehicles. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0021] In the diagram: 1. Compressor; 2. Gas-liquid separator; 3. First electronic expansion valve; 4. First heat exchanger; 5. First three-way reversing valve; 6. Outdoor heat exchanger; 7. Second heat exchanger; 8. Second electronic expansion valve; 9. Evaporator; 10. Third electronic expansion valve; 11. PTC heater; 12. First electronic water pump; 13. Five-way reversing valve; 14. Heater core; 15. Defroster; 16. Second three-way reversing valve; 17. Third three-way reversing valve; 18. Fourth... 19. Three-way reversing valve; 20. Drive motor assembly; 21. First radiator; 22. Second electronic water pump; 23. First expansion tank; 24. Fifth three-way reversing valve; 25. Six-way reversing valve; 26. Second expansion tank; 27. Third electronic water pump; 28. Power battery; 29. ​​Four-way reversing valve; 30. Second radiator; 31. Fuel cell; 32. Fourth electronic water pump; 33. Third expansion tank; 34. Sixth three-way reversing valve; 35. Third radiator. Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0023] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0024] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0025] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0026] Reference Figure 1 A thermal management structure for fuel cell vehicles without PTC heating for defrosting and demisting includes a fuel cell thermal management circuit, a power battery thermal management circuit, a drive motor assembly thermal management circuit, and an in-cabin thermal management circuit.

[0027] The power battery thermal management circuit is located inside the fuel cell thermal management circuit, the drive motor assembly thermal management circuit is located at one end of the power battery thermal management circuit, and the cabin thermal management circuit is located outside the power battery thermal management circuit.

[0028] The fuel cell thermal management circuit includes a first heat exchanger 4, a first three-way reversing valve 5, a second heat exchanger 7, a PTC heater 11, a first electronic water pump 12, a five-way reversing valve 13, a heater core 14, a defroster 15, a second three-way reversing valve 16, a third three-way reversing valve 17, a six-way reversing valve 24, a four-way reversing valve 28, a fuel cell 30, a fourth electronic water pump 31, a third expansion tank 32, a sixth three-way reversing valve 33, and a third radiator 34. One end of the first heat exchanger 4 is connected to the first three-way reversing valve 5 and the PTC heater 11, and the first three-way reversing valve 5 is located on top of the PTC heater 11. The first three-way reversing valve 5 has three interfaces: a, b, and c. The b-connection port of the first three-way reversing valve 5 is connected to the first heat exchanger 4. The bottom of the first three-way reversing valve 5 is connected to the second heat exchanger 7, so that the second heat exchanger 7 is connected to the c-connection port on the first three-way reversing valve 5.

[0029] The bottom of the PTC heater 11 is connected to a first electronic water pump 12. One end of the first electronic water pump 12 is connected to a five-way reversing valve 13. The five-way reversing valve 13 has five interfaces: a, b, c, d, and e. The interface a of the five-way reversing valve 13 is connected to the first electronic water pump 12.

[0030] The other end of the first heat exchanger 4 is connected to a second three-way reversing valve 16, and the interface of the second three-way reversing valve 16 is divided into three interfaces: a, b, and c. The interface a of the second three-way reversing valve 16 is connected to the first heat exchanger 4. The bottom of the second three-way reversing valve 16 is connected to a heater core 14, so that the heater core 14 is connected to the C interface of the second three-way reversing valve 16. The bottom end of the heater core 14 is connected to a five-way reversing valve 13, so that the heater core 14 is connected to the b interface of the five-way reversing valve 13.

[0031] One end of the second three-way directional valve 16 is connected to the third three-way directional valve 17, and the third three-way directional valve 17 has three interfaces: a, b, and c. The b interface of the second three-way directional valve 16 is connected to the a interface of the third three-way directional valve 17. The bottom of the third three-way directional valve 17 is connected to the defrost device 15, so that the defrost device 15 is connected to the c interface of the third three-way directional valve 17. The defrost device 15 is connected to the five-way directional valve 13, so that the defrost device 15 is connected to the c interface of the five-way directional valve 13.

[0032] One end of the third three-way reversing valve 17 is connected to a four-way reversing valve 28. The four-way reversing valve 28 has four ports: a, b, c, and d. The port b of the four-way reversing valve 28 is connected to the port b of the third three-way reversing valve 17. One end of the four-way reversing valve 28 is connected to a fuel cell 30, so that the fuel cell 30 is connected to the port c of the four-way reversing valve 28. The bottom of the fuel cell 30 is connected to a fourth electronic water pump 31, and the bottom of the fourth electronic water pump 31 is connected to a third expansion tank 32.

[0033] The bottom of the third expansion tank 32 is connected to the sixth three-way reversing valve 33, and the sixth three-way reversing valve 33 has three ports: a, b, and c. The third expansion tank 32 is connected to the c port of the sixth three-way reversing valve 33. The sixth three-way reversing valve 33 is connected to the second heat exchanger 7, and the third expansion tank 32 is connected to the second heat exchanger 7. The b port of the sixth three-way reversing valve 33 is connected to the second heat exchanger 7, and the bottom of the third expansion tank 32 is connected to both the sixth three-way reversing valve 33 and the second heat exchanger 7.

[0034] One end of the sixth three-way directional valve 33 is connected to a six-way directional valve 24, and the six-way directional valve 24 has six ports: a, b, c, d, e, and f. Port a of the sixth three-way directional valve 33 is connected to the six-way directional valve 24. of The d-port is connected to a third radiator 34, one end of the six-way directional valve 24 is connected to the e-port of the six-way directional valve 24, and the third radiator 34 is connected to the five-way directional valve 13, so that the third radiator 34 is connected to the e-port of the five-way directional valve 13.

[0035] Thus, the large and small cycles of the fuel cell thermal management circuit are controlled by the four-way reversing valve 28, the five-way reversing valve 13, and the six-way reversing valve 24. When the fuel cell 30 needs heating for cold start, ports b and c of the four-way reversing valve 28 are connected, ports a and b of the second three-way reversing valve 16 are connected, ports a and b of the third three-way reversing valve 17 are connected to the first heat exchanger 4 for heat exchange, the PTC heater 11 works, ports a and d of the five-way reversing valve 13 are connected, ports f and d of the six-way reversing valve 24 are connected, and ports a and c of the sixth three-way reversing valve 33 are connected to heat the fuel cell 30 during cold start. When the temperature of the fuel cell 30 is at a suitable operating temperature, the four-way reversing valve 28... The C and B ports of the first three-way directional valve 17 are connected, and the B and C ports of the second three-way directional valve 17 are connected. Through the defroster 15, the C and D ports of the fifth-way directional valve 13 are connected, the F and D ports of the sixth-way directional valve 24 are connected, and the A and C ports of the sixth three-way directional valve 33 are connected, realizing a small loop of the fuel cell thermal management circuit. When the temperature of the fuel cell 30 exceeds the suitable operating temperature range, the C and B ports of the fourth-way directional valve 28 are connected, the B and C ports of the second three-way directional valve 17 are connected, and the C and E ports of the fifth-way directional valve 13, the E and D ports of the sixth-way directional valve 24, and the A and B ports of the sixth three-way directional valve 33 are connected, realizing a large loop of the fuel cell thermal management circuit. Both the large and small loops pass through the defroster 15, allowing for continuous defrosting and demisting in winter without a PTC heat source.

[0036] When the excess heat from the fuel cell is needed to heat the passenger compartment, ports c and b of the four-way reversing valve 28 are connected, ports a, b, and c of the third three-way reversing valve 17 are all connected, and ports b and c of the second three-way reversing valve 16 are connected. Through the warm air core 14 and the defroster 15, a heat source is provided for heating the passenger compartment and for continuous defrosting and defogging in winter.

[0037] The power battery thermal management circuit includes a second expansion tank 25, a third electronic water pump 26, a power battery 27, and a second radiator 29. The bottom of the second expansion tank 25 is connected to a six-way reversing valve 24, so that the second expansion tank 25 is connected to the b port of the six-way reversing valve 24. The top of the second expansion tank 25 is connected to the third electronic water pump 26, and the top of the third electronic water pump 26 is connected to the power battery 27. The power battery 27 is connected to a four-way reversing valve 28, so that the power battery 27 is connected to the a port of the four-way reversing valve 28. The bottom of the four-way reversing valve 28 is connected to the second radiator 29, so that the second radiator 29 is connected to the d port of the four-way reversing valve 28. This allows the four-way reversing valve 28 and the six-way reversing valve 24 to control the power battery thermal management circuit. When the power battery 27 is at a suitable operating temperature, the a and d ports of the four-way reversing valve 28 are connected, and the c and b ports of the six-way reversing valve 24 are connected. At this time, the radiator does not work. To ensure the normal operation of the power battery thermal management circuit, when the temperature of the power battery 27 exceeds the suitable operating temperature range, the a and d ports of the four-way reversing valve 28 are connected, and the c and b ports of the six-way reversing valve 24 are connected. At this time, the radiator works to dissipate heat from the power battery 27.

[0038] The thermal management circuit of the drive motor assembly includes a fourth three-way reversing valve 18, a drive motor assembly 19, a first radiator 20, a second electronic water pump 21, a first expansion tank 22, and a fifth three-way reversing valve 23. The bottom of the fourth three-way reversing valve 18 is connected to the drive motor assembly 19, and the top of the fourth three-way reversing valve 18 is connected to the connecting pipe between the third three-way reversing valve 17 and the four-way reversing valve 28. The connection port of the fourth three-way reversing valve 18 is divided into three connection ports: a, b, and c. The connection port a of the fourth three-way reversing valve 18 is connected to the third three-way reversing valve 17, and the connection port b of the fourth three-way reversing valve 18 is connected to the drive motor assembly 19.

[0039] The bottom of the drive motor assembly 19 is connected to a second electronic water pump 21, the bottom of the second electronic water pump 21 is connected to a first expansion tank 22, the bottom of the first expansion tank 22 is connected to a fifth three-way reversing valve 23, the fifth three-way reversing valve 23 has three connection ports: a, b, and c, the first expansion tank 22 is connected to the a connection port of the fifth three-way reversing valve 23, the fifth three-way reversing valve 23 is connected to a six-way reversing valve 24, and the c connection port of the fifth three-way reversing valve 23 is connected to the a connection port of the six-way reversing valve 24.

[0040] One end of the fifth three-way reversing valve 23 is connected to the first radiator 20, so that the first radiator 20 is connected to the b connection port of the fifth three-way reversing valve 23, and the first radiator 20 is connected to the fourth three-way reversing valve 18, so that the first radiator 20 is connected to the c connection port of the fourth three-way reversing valve 18.

[0041] When the drive motor assembly 19 is within its suitable operating temperature range, ports a and b of the fourth three-way directional valve 18 are connected, ports c and b of the third three-way directional valve 17 are connected, and through the defrost 15, ports c and d of the five-way directional valve 13 are connected, ports a and f of the six-way directional valve 24 are connected, and ports a and c of the fifth three-way directional valve 23 are connected, and the motor assembly is in normal operating condition. When the drive motor assembly 19 needs heat dissipation, ports a and b of the fourth three-way directional valve 18 are connected, ports c and b of the third three-way directional valve 17 are connected, and through the defrost 15, ports c and e of the five-way directional valve 13 are connected, ports a and e of the six-way directional valve 24 are connected, and ports a and c of the fifth three-way directional valve 23 are connected, and the motor assembly is in heat dissipation condition. In both states, the defrost 15 can utilize the heat from its coolant for continuous defrosting and demisting in winter.

[0042] When the waste heat from the drive motor assembly 19 is needed to heat the passenger compartment, ports b and c of the fourth three-way reversing valve 18 are connected, ports a, b, and c of the third three-way reversing valve 17 are all connected, and ports b and c of the second three-way reversing valve 16 are connected. Through the heater core 14 and the defroster 15, a heat source is provided for heating the passenger compartment and for continuous defrosting and defogging in winter.

[0043] When there is excessive waste heat from the fuel cell 30 and the drive motor assembly 19, the waste heat from the drive motor assembly 19 will not be utilized. At this time, the b and c ports of the fourth three-way reversing valve 18 are connected, and the drive motor assembly 19 is cooled through the first radiator 20 and the a and b ports of the fifth three-way reversing valve 23.

[0044] The cabin thermal management circuit includes a compressor 1, a gas-liquid separator 2, a first electronic expansion valve 3, an outdoor heat exchanger 6, a second electronic expansion valve 8, an evaporator 9, and a third electronic expansion valve 10. One end of the compressor 1 is connected to the first electronic expansion valve 3, which is connected to the first heat exchanger 4. When the cabin temperature is low and there is no residual heat available, the heat is supplied to the cabin through the first heat exchanger 4, the PTC heater 11, and the a and b ports of the five-way valve, and through the warm air core 14. The other end of the compressor 1 is connected to the gas-liquid separator 2, and one end of the gas-liquid separator 2 is connected to the evaporator 9 and the third electronic expansion valve 10, respectively. The evaporator 9 is located at one end of the third electronic expansion valve 10. The bottom of the evaporator 9 is connected to the second electronic expansion valve 8, and both the second electronic expansion valve 8 and the third electronic expansion valve 10 are connected to the outdoor heat exchanger 6 through the second heat exchanger 7. The outdoor heat exchanger 6 is connected to the first three-way reversing valve 5, allowing the outdoor heat exchanger 6 to be connected to the a port of the first three-way reversing valve 5.

[0045] The PTC heater 11 prioritizes heating the fuel cell 30 to ensure normal vehicle startup. Secondly, it ensures a suitable cabin temperature. When there is residual heat available, it is used for heating. The defroster 15 is directly connected to the fuel cell thermal management circuit and the drive motor thermal management circuit, enabling continuous defrosting and demisting in winter without the PTC heater 11 providing a heat source. This ensures the normal operation of the vehicle's thermal management and the rational utilization of the vehicle's energy.

[0046] The four-way reversing valve, five-way reversing valve, and six-way reversing valve can control the heat dissipation conditions of the fuel cell thermal management circuit and the power battery thermal management circuit. The drive motor assembly 19 has an independent heat dissipation circuit.

[0047] The coolant in the heater core 14 and defroster 15 is directly connected to the thermal management circuit of the fuel cell 30 and the motor assembly. It directly utilizes the heat from the fuel cell 30 or the high-temperature coolant of the drive motor assembly 19 for heating, or directly utilizes the coolant in the fuel cell thermal management circuit and the waste heat from the motor for continuous defrosting and defogging in winter, avoiding energy waste, improving energy utilization, and increasing the driving range of the fuel cell vehicle 30. Taking into full account the difficulty of cold starting in low ambient temperatures, the fuel cell vehicle 30 is heated by a PTC heater 11, a four-way reversing valve 28, a five-way reversing valve 13, and a six-way reversing valve 24. This effectively utilizes the waste heat from the fuel cell 30 and the drive motor assembly 19, overcoming the difficulty of cold starting in low ambient temperatures, solving the problems of low efficiency of the heat pump air conditioning in low-temperature environments and the large amount of electricity consumed by continuous defrosting and defogging in winter, and increasing the driving range of the fuel cell vehicle 30.

[0048] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A thermal management structure for fuel cell vehicles without PTC heating for defrosting and demisting, characterized in that, This includes the thermal management circuit for the fuel cell, the thermal management circuit for the power battery, the thermal management circuit for the drive motor assembly, and the thermal management circuit for the cabin. The power battery thermal management circuit is located inside the fuel cell thermal management circuit, the drive motor assembly thermal management circuit is located at one end of the power battery thermal management circuit, and the cabin thermal management circuit is located outside the power battery thermal management circuit. The fuel cell thermal management circuit includes a first heat exchanger (4), a first three-way reversing valve (5), a second heat exchanger (7), a PTC heater (11), a first electric water pump (12), a five-way reversing valve (13), a second three-way reversing valve (16), and a third three-way reversing valve (17). One end of the first heat exchanger (4) is connected to the first three-way reversing valve (5) and the PTC heater (11), and the first three-way reversing valve (5) is located at the top of the PTC heater (11). The bottom of the first three-way reversing valve (5) is connected to the second heat exchanger (7). The bottom of the PTC heater (11) is connected to the first electric water pump (12). One end of the first electric water pump (12) is connected to the five-way reversing valve (13). The other end of the first heat exchanger (4) is connected to the second three-way reversing valve (16), and one end of the second three-way reversing valve (16) is connected to the third three-way reversing valve (17). The fuel cell thermal management circuit includes a heater core (14) and a defroster (15). The bottom of the second three-way reversing valve (16) is connected to the heater core (14), and the bottom of the heater core (14) is connected to the five-way reversing valve (13). The bottom of the third three-way reversing valve (17) is connected to the defroster (15), and the defroster (15) is connected to the five-way reversing valve (13). The fuel cell thermal management circuit includes a six-way reversing valve (24), a four-way reversing valve (28), a fuel cell (30), a fourth electronic water pump (31), a third expansion tank (32), a sixth three-way reversing valve (33), and a third radiator (34). One end of the third three-way reversing valve (17) is connected to the four-way reversing valve (28), and one end of the four-way reversing valve (28) is connected to the fuel cell (30). The bottom of the fuel cell (30) is connected to the fourth electronic water pump (31). 1) The bottom of the third expansion tank (32) is connected to the third expansion tank (32), the bottom of the third expansion tank (32) is connected to the sixth three-way reversing valve (33), and the sixth three-way reversing valve (33) is connected to the second heat exchanger (7), and the third expansion tank (32) is connected to the second heat exchanger (7). One end of the sixth three-way reversing valve (33) is connected to the six-way reversing valve (24), one end of the six-way reversing valve (24) is connected to the third radiator (34), and the third radiator (34) is connected to the five-way reversing valve (13). The power battery thermal management circuit includes a second expansion tank (25), a third electronic water pump (26), a power battery (27), and a second radiator (29). The bottom of the second expansion tank (25) is connected to a six-way reversing valve (24), the top of the second expansion tank (25) is connected to the third electronic water pump (26), the top of the third electronic water pump (26) is connected to the power battery (27), the power battery (27) is connected to a four-way reversing valve (28), and the bottom of the four-way reversing valve (28) is connected to the second radiator (29). The thermal management circuit of the drive motor assembly includes a fourth three-way reversing valve (18), a drive motor assembly (19), a first radiator (20), a second electric water pump (21), a first expansion tank (22), and a fifth three-way reversing valve (23). The bottom of the fourth three-way reversing valve (18) is connected to the drive motor assembly (19), the bottom of the drive motor assembly (19) is connected to the second electric water pump (21), and the bottom of the second electric water pump (21) is connected to the first expansion tank. The bottom of the first expansion kettle (22) is connected to a fifth three-way reversing valve (23), which is connected to a six-way reversing valve (24). One end of the fifth three-way reversing valve (23) is connected to a first radiator (20), which is connected to a fourth three-way reversing valve (18). The top of the fourth three-way reversing valve (18) is connected to the connecting pipe between the third three-way reversing valve (17) and the four-way reversing valve (28).

2. The fuel cell vehicle thermal management structure for defrosting and demisting without PTC heating according to claim 1, characterized in that, The cabin thermal management circuit includes a compressor (1), a gas-liquid separator (2), a first electronic expansion valve (3), an outdoor heat exchanger (6), a second electronic expansion valve (8), an evaporator (9), and a third electronic expansion valve (10). One end of the compressor (1) is connected to the first electronic expansion valve (3), which is connected to the first heat exchanger (4). The other end of the compressor (1) is connected to the gas-liquid separator (2). One end of the gas-liquid separator (2) is connected to the evaporator (9) and the third electronic expansion valve (10), respectively. The evaporator (9) is located at one end of the third electronic expansion valve (10). The bottom of the evaporator (9) is connected to the second electronic expansion valve (8). Both the second electronic expansion valve (8) and the third electronic expansion valve (10) are connected to the outdoor heat exchanger (6) through the second heat exchanger (7). The outdoor heat exchanger (6) is connected to the first three-way reversing valve (5).

Images