Cooling system for hydrogen energy vehicle

Abstract

The utility model relates to the technical field of batteries for hydrogen energy vehicles, and discloses a cooling system for a hydrogen energy vehicle, which comprises a fuel cell system, a main cooling loop, an auxiliary cooling loop and a thermal management controller, the fuel cell system comprises a first inlet and a first outlet which are communicated with the main cooling loop, and a second inlet and a second outlet which are communicated with the auxiliary cooling loop; the main cooling loop comprises a first pipeline, a first multi-way valve, a first radiator and a first temperature monitoring unit; the auxiliary cooling loop comprises a second pipeline, a second multi-way valve, a second radiator, a pump body, a DC / DC converter and a second temperature monitoring unit. The heat management controller has the beneficial effects that the heat management controller controls the flow in each radiator through the multi-way valve and the temperature monitoring unit, so as to realize on-demand heat dissipation. And when the environment temperature is relatively low, the cooling liquid flow in the radiator can be reduced, the temperature rising rate of the cooling liquid is improved, and the optimal working temperature of the fuel cell system is efficiently maintained.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen energy vehicle batteries, in particular to a hydrogen energy vehicle cooling system. Background Technique

[0002] With the continuous development of fuel cell technology, the output power of fuel cell systems is also increasing continuously, and the requirements for the heat dissipation power of cooling systems are getting higher and higher. A single radiator in the cooling system has gradually been unable to meet the heat dissipation requirements of fuel cell systems, and multiple radiators need to be used for heat dissipation.

[0003] In the prior art, the connection methods of multiple radiators are divided into series and parallel. Connecting multiple radiators in series will increase the flow resistance of the cooling circuit, thereby increasing the pump body power consumption and causing unnecessary energy consumption; when connecting multiple radiators in parallel, many vehicle models use cooling pipes with the same inner diameter to connect different radiators, but the coolant flow rates between different radiators cannot be controlled, and the coolant flow rates of each radiator are not allocated, which will cause the coolant outlet temperatures of multiple radiators to be inconsistent, resulting in low working efficiency of the entire cooling system, unable to make full use of the heat dissipation performance of the radiators, and thus affecting the operation of the fuel cell system and the vehicle power performance.

[0004] When the ambient temperature is low, the coolant circulates inside the fuel cell system and starts the external circulation after reaching the set temperature value. Since the radiators selected for high-power fuel cell systems have relatively high heat dissipation power, there is a large hysteresis area after the internal circulation switches to the external circulation, resulting in too low coolant temperature or slow rise of the coolant temperature, and unable to efficiently maintain the optimal working temperature of the fuel cell system. Content of the Utility Model

[0005] The purpose of the utility model is to provide a hydrogen energy vehicle cooling system, which is provided with a main cooling circuit and an auxiliary cooling circuit. The main cooling circuit is mainly used for heat dissipation of the fuel cell stack, and the auxiliary cooling circuit is mainly used for heat dissipation of components other than the fuel cell stack. The thermal management controller controls the flow rates in each radiator through a multi-way valve and a temperature monitoring unit to achieve heat dissipation on demand. When the ambient temperature is low, the coolant flow rate in the radiator can be reduced to increase the coolant temperature rise rate and efficiently maintain the optimal working temperature of the fuel cell system.

[0006] To achieve the above purpose, the utility model provides a hydrogen energy vehicle cooling system, which includes a fuel cell system, a main cooling circuit, an auxiliary cooling circuit, and a thermal management controller;

[0007] The fuel cell system includes a first inlet and a first outlet communicated with the main cooling circuit, and a second inlet and a second outlet communicated with the auxiliary cooling circuit;

[0008] The main cooling circuit includes a first pipeline, a first multi-way valve, a first radiator, and a first temperature monitoring unit. The liquid inlet of the first pipeline is communicated with the first outlet. A plurality of the first radiators are arranged in parallel through the first multi-way valve on the first pipeline. The liquid outlet of the first pipeline is communicated with the first inlet. The first temperature monitoring unit is provided at the liquid outlet of each of the plurality of first radiators, and the liquid outlets of the plurality of first radiators are communicated with the first inlet through the first pipeline;

[0009] The auxiliary cooling circuit includes a second pipeline, a second multi-way valve, a second radiator, a pump body, a DC / DC converter, and a second temperature monitoring unit. The inlet of the second pipeline is connected to the second outlet. The second radiator and the DC / DC converter are arranged in parallel through the second multi-way valve on the second pipeline. The second temperature monitoring unit is provided at the liquid outlet of each of the second radiator and the DC / DC converter;

[0010] The first radiator, the second radiator, the first temperature monitoring unit, the second temperature monitoring unit, the pump body, the first multi-way valve, and the second multi-way valve are all electrically connected to the thermal management controller.

[0011] Furthermore, a first exhaust pipeline is further included. The fuel cell system is provided with a first exhaust port. One end of the first exhaust pipeline is communicated with the second exhaust port of the first radiator. The other end of the first exhaust pipeline is provided with a first box body and a deionizer. A plurality of third exhaust ports are provided on the first box body. The first exhaust port is communicated with one of the third exhaust ports through the deionizer.

[0012] Furthermore, the fuel cell system is further provided with a liquid filling port. A particle filter is further provided on the first exhaust pipeline. The liquid outlet of the first box body is connected to the particle filter. The other end of the particle filter is communicated with the liquid filling port.

[0013] Furthermore, a second exhaust pipeline is further included. The fourth exhaust port on the second radiator is communicated with one end of the second exhaust pipeline. The other end of the second exhaust pipeline is provided with a second box body. A plurality of fourth exhaust ports are provided on the second box body. The liquid outlet of the second box body is communicated with the second inlet.

[0014] Furthermore, the temperature monitoring unit is a temperature sensor.

[0015] Furthermore, the number of the third exhaust ports is at least 3.

[0016] Furthermore, the number of the fourth exhaust ports is at least 2.

[0017] Furthermore, the first multi-way valve and the second multi-way valve are three-way solenoid valves.

[0018] Compared with the prior art, the cooling system for a hydrogen energy vehicle according to an embodiment of the present invention has the following beneficial effects: The main cooling circuit is connected to the fuel cell system through the first inlet and the first outlet, and is mainly used for dissipating heat from the fuel cell stack; the auxiliary cooling circuit is connected to the fuel cell system through the second inlet and the second outlet, and is used for dissipating heat from other components except the fuel cell stack. Heat dissipation distribution can be carried out according to the heat dissipation requirements of different components; the thermal management controller controls the opening degree of the first multi-way valve through the first temperature monitoring unit at the liquid outlet of each first radiator, thereby controlling the flow rate of each first radiator, and can keep the temperature at the coolant outlet of each first radiator consistent, realizing heat dissipation on demand. Similarly, in the auxiliary cooling circuit, the second radiator and the DC / DC converter are arranged in parallel. The thermal management controller controls the opening degree of the second multi-way valve through the second temperature monitoring unit at the liquid outlets of the second radiator and the DC / DC converter, thereby controlling the flow rates of the second radiator and the DC / DC converter, and further controlling the coolant flow rates at various places in the auxiliary cooling circuit to keep the heat dissipation temperature at the coolant outlet consistent, realizing heat dissipation on demand. When the ambient temperature is relatively low, the coolant flow rates in the first radiator and the second radiator can be reduced to increase the coolant temperature rise rate and efficiently maintain the optimal working temperature of the fuel cell system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is the system schematic diagram of the cooling system for a hydrogen energy vehicle according to an embodiment of the present invention.

[0020] In the figure, 1, fuel cell system; 11, first inlet; 12, first outlet; 13, second inlet; 14, second outlet; 15, first exhaust port; 16, liquid filling port;

[0021] 2, main cooling circuit; 21, first pipeline; 22, first multi-way valve; 23, first radiator; 231, second exhaust port; 24, first temperature monitoring unit;

[0022] 3, auxiliary cooling circuit; 31, second pipeline; 32, second multi-way valve; 33, second radiator; 331, fourth exhaust port; 34, pump body; 35, DC / DC converter; 36, second temperature monitoring unit;

[0023] 4, thermal management controller;

[0024] 5, first exhaust pipeline; 51, first box body; 511, third exhaust port; 52, deionizer; 53, particle filter.

[0025] 6, second exhaust pipeline; 61, second box body; 611, fourth exhaust port. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The specific embodiments of the present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0027] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "inner", "outer", etc. in the present utility model is based on the positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device and components referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0028] In the description of the present utility model, it should be understood that the terms "first", "second", etc. are used in the present utility model to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present utility model, the "first" information may also be referred to as the "second" information, and similarly, the "second" information may also be referred to as the "first" information.

[0029] As Figure 1 shown, a hydrogen energy vehicle cooling system according to a preferred embodiment of the present utility model includes a fuel cell system 1, a main cooling circuit 2, an auxiliary cooling circuit 3, and a thermal management controller 4. Among them, the main cooling circuit 2 is mainly used for dissipating heat from the fuel cell stack in the fuel cell system 1, and the auxiliary cooling circuit 3 is mainly used for dissipating heat from other components except the fuel cell stack, such as an air compressor, an air compressor controller, and a DC / DC converter 35.

[0030] Specifically, to facilitate the formation of a coolant circulation between the fuel cell system 1 and the main cooling circuit 2 and the auxiliary cooling circuit 3 respectively, the fuel cell system 1 includes a first inlet 11 and a first outlet 12 communicating with the main cooling circuit 2, and a second inlet 13 and a second outlet 14 communicating with the auxiliary cooling circuit 3. Further, in this embodiment, the main cooling circuit 2 includes a first pipeline 21, a first multi-way valve 22, a first radiator 23, and a first temperature monitoring unit 24. Among them, the liquid inlet of the first pipeline 21 is communicated with the first outlet 12, and a plurality of first radiators 23 are arranged in parallel through the first multi-way valve 22 on the first pipeline 21. The liquid outlet of the first pipeline 21 is communicated with the first inlet 11. To facilitate the individual control of the coolant flow rate in each first radiator 23, a first temperature monitoring unit 24 is provided at the liquid outlet of each first radiator 23, and the liquid outlets of the plurality of first radiators 23 are communicated with the first inlet 11 through the first pipeline 21. The heat management controller 4 controls the opening degree of the first multi-way valve 22 through the first temperature monitoring unit 24 at the liquid outlet of each first radiator 23, thereby controlling the coolant flow rate of each first radiator 23, enabling the temperature at the coolant outlet of each first radiator 23 to be kept consistent, and achieving heat dissipation on demand.

[0031] Among them, the circulation loop of the coolant in the main cooling circuit 2 is as follows: The coolant in the fuel cell system 1 flows from the first outlet 12 into the first pipeline 21, is cooled by a plurality of first radiators 23, and then flows back to the fuel cell system 1 from the first inlet 11.

[0032] Further, in this embodiment, to facilitate the design of the auxiliary cooling circuit 3, the auxiliary cooling circuit 3 includes a second pipeline 31, a second multi-way valve 32, a second radiator 33, a pump body 34, a DC / DC converter 35, and a second temperature monitoring unit 36. The first radiator 23, the second radiator 33, the first temperature monitoring unit 24, the second temperature monitoring unit 36, the pump body 34, the first multi-way valve 22, and the second multi-way valve 32 are all electrically connected to the heat management controller 4. The inlet of the second pipeline 31 is connected to the second outlet 14. A second radiator 33 and a DC / DC converter 35 are arranged in parallel through the second multi-way valve 32 on the second pipeline 31. Second temperature monitoring units 36 are provided at the liquid outlets of the second radiator 33 and the DC / DC converter 35. The heat management controller 4 controls the opening degree of the second multi-way valve 32 through the second temperature monitoring unit 36 at the liquid outlets of the second radiator 33 and the DC / DC converter 35, thereby controlling the flow rates of the second radiator 33 and the DC / DC converter 35, and further controlling the coolant flow rates at various places in the auxiliary cooling circuit 3 to achieve heat dissipation on demand.

[0033] The circulation loop of the coolant in the auxiliary cooling circuit 3 is as follows: the coolant in the fuel system flows from the second outlet 14 into the second pipeline 31 , and flows back to the fuel cell system 1 from the second inlet 13 after being cooled by the second radiator 33 .

[0034] Furthermore, in order to facilitate the discharge of excess gas in the main cooling loop 2 and improve the heat dissipation effect, the first exhaust pipeline 5 is also included. The fuel cell system 1 is provided with a first exhaust port 15. One end of the first exhaust pipeline 5 is connected to the second exhaust port 231 of the first radiator 23. The other end of the first exhaust pipeline 5 is provided with a first box 51 and a deionizer 52. A plurality of third exhaust ports 511 are provided on the first box 51. The first exhaust port 15 is connected to a third exhaust port 511 through the deionizer 52, so as to achieve the effect of controlling the conductivity of the coolant and discharging excess gas in the circulation loop. Since one third exhaust port 511 in the first box 51 needs to be connected to the first exhaust pipeline 5, and another third exhaust port 511 needs to be connected to the first exhaust port 15, and the gas in the first box 51 needs to be discharged, the number of the third exhaust ports 511 is at least 3.

[0035] Furthermore, in order to facilitate the replenishment of coolant to the fuel cell system 1, the fuel cell system 1 is further provided with a liquid replenishment port 16. The first box 51 is filled with coolant. Figure 1 A particle filter 53 is also provided on the first exhaust pipeline 5. The liquid outlet of the first box 51 is connected to the particle filter 53. The other end of the particle filter 53 is connected to the liquid replenishing port 16. The coolant is filtered by the particle filter 53 and the filtered coolant is transported to the fuel cell system 1.

[0036] Further, to facilitate the discharge of excess gas in the auxiliary cooling circuit 3 and replenish the coolant in the auxiliary cooling circuit 3 at the same time, in this embodiment, a second exhaust pipe 6 is further included. Among them, the fourth exhaust port 611331 on the second radiator 33 is communicated with one end of the second exhaust pipe 6. The other end of the second exhaust pipe 6 is provided with a second box body 61. The second box body 61 is filled with coolant. The second box body 61 is provided with a plurality of fourth exhaust ports 611331, and the number of the fourth exhaust ports 611331 is at least 2. The liquid outlet of the second box body 61 is communicated with the second inlet 13. When the ambient temperature of the auxiliary cooling circuit 3 is relatively high, the coolant flows out from the second outlet 14, enters the second multi-way valve 32 after passing through the pump body 34 and is divided into two paths. Among them, one path flows into the fuel cell system 1 through the second inlet 13 after passing through the second radiator 33, and the other path flows to the inlet of the pump body 34 through the DC / DC converter 35, so as to realize the circulating flow of the coolant in the auxiliary cooling circuit 3. According to the second temperature monitoring unit 36, the opening degrees of the second multi-way valve 32, the second radiator 33, and the DC / DC converter 35 can be controlled to adjust the flow distribution in the second radiator 33 and the DC / DC converter 35, so that the outlet temperature of the coolant is kept consistent and the best heat dissipation efficiency is achieved. When the ambient temperature is relatively low, the pump body 34 and the second radiator 33 can be stopped by the thermal management controller 4 to reduce the power consumption of the vehicle.

[0037] Further, in this embodiment, the temperature monitoring unit selects a temperature sensor. At the same time, in order to realize the electrical control of the first multi-way valve 22 and the second multi-way valve 32 by the thermal management controller 4, in this embodiment, the first multi-way valve 22 and the second multi-way valve 32 are three-way solenoid valves, and can be adjusted accordingly according to the number of the first radiators 23 arranged in parallel.

[0038] In summary, the embodiment of the present utility model provides a cooling system for a hydrogen energy vehicle. The main cooling circuit 2 is connected to the fuel cell system 1 through the first inlet 11 and the first outlet 12, and is mainly used for dissipating heat from the fuel cell stack. The auxiliary cooling circuit 3 is connected to the fuel cell system 1 through the second inlet 13 and the second outlet 14, and is used for dissipating heat from other components except the fuel cell stack. Heat dissipation distribution can be carried out according to the heat dissipation requirements of different components. The thermal management controller 4 controls the opening degree of the first multi-way valve 22 through the first temperature monitoring unit 24 at the liquid outlet of each first radiator 23, thereby controlling the flow rate of each first radiator 23, and can keep the temperature at the coolant outlet of each first radiator 23 consistent, realizing heat dissipation on demand. Similarly, the second radiator 33 and the DC / DC converter 35 in the auxiliary cooling circuit 3 are arranged in parallel. The thermal management controller 4 controls the opening degree of the second multi-way valve 32 through the second temperature monitoring unit 36 at the liquid outlets of the second radiator 33 and the DC / DC converter 35, controls the flow rates of the second radiator 33 and the DC / DC converter 35, and further controls the coolant flow rates at various places in the auxiliary cooling circuit 3, so that the heat dissipation temperature at the coolant outlet is kept consistent, realizing heat dissipation on demand. When the ambient temperature is low, the coolant flow rates in the first radiator 23 and the second radiator 33 can be reduced to increase the rising rate of the coolant temperature and efficiently maintain the optimal working temperature of the fuel cell system 1.

[0039] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present utility model, several improvements and substitutions can be made, and these improvements and substitutions should also be regarded as the protection scope of the present utility model.

Claims

1. A cooling system for a hydrogen energy vehicle, characterized in that: It includes a fuel cell system, a main cooling circuit, an auxiliary cooling circuit, and a thermal management controller; The fuel cell system includes a first inlet and a first outlet communicating with the main cooling circuit, and a second inlet and a second outlet communicating with the auxiliary cooling circuit; The main cooling circuit includes a first pipeline, a first multi-way valve, a first radiator, and a first temperature monitoring unit. The liquid inlet of the first pipeline is communicated with the first outlet. Multiple first radiators are arranged in parallel through the first multi-way valve on the first pipeline. The liquid outlet of the first pipeline is communicated with the first inlet. The first temperature monitoring unit is provided at the liquid outlet of each of the multiple first radiators, and the liquid outlets of the multiple first radiators are communicated with the first inlet through the first pipeline; The auxiliary cooling circuit includes a second pipeline, a second multi-way valve, a second radiator, a pump body, a DC / DC converter, and a second temperature monitoring unit. The inlet of the second pipeline is connected to the second outlet. The second radiator and the DC / DC converter are arranged in parallel through the second multi-way valve on the second pipeline. The second temperature monitoring unit is provided at the liquid outlet of each of the second radiator and the DC / DC converter; The first radiator, the second radiator, the first temperature monitoring unit, the second temperature monitoring unit, the pump body, the first multi-way valve, and the second multi-way valve are all electrically connected to the thermal management controller.

2. The hydrogen energy vehicle cooling system according to claim 1, characterized in that: It further includes a first exhaust pipeline. The fuel cell system is provided with a first exhaust port. One end of the first exhaust pipeline is communicated with the second exhaust port of the first radiator. The other end of the first exhaust pipeline is provided with a first box body and a deionizer. Multiple third exhaust ports are provided on the first box body. The first exhaust port is communicated with one of the third exhaust ports through the deionizer.

3. The hydrogen energy vehicle cooling system according to claim 2, wherein: The fuel cell system is further provided with a liquid filling port. A particle filter is further provided on the first exhaust pipeline. The liquid outlet of the first box body is connected to the particle filter, and the other end of the particle filter is communicated with the liquid filling port.

4. The hydrogen energy vehicle cooling system according to claim 3, wherein: It further includes a second exhaust pipeline. The fourth exhaust port on the second radiator is communicated with one end of the second exhaust pipeline. The other end of the second exhaust pipeline is provided with a second box body. Multiple fourth exhaust ports are provided on the second box body. The liquid outlet of the second box body is communicated with the second inlet.

5. The hydrogen energy vehicle cooling system according to claim 1, wherein: The temperature monitoring unit is a temperature sensor.

6. The hydrogen energy vehicle cooling system according to claim 2, wherein: The number of the third exhaust ports is at least 3.

7. The hydrogen energy vehicle cooling system according to claim 4, characterized in that: The number of the fourth exhaust ports is at least 2.

8. The hydrogen energy vehicle cooling system according to claim 1, characterized in that: The first multi-way valve and the second multi-way valve are three-way solenoid valves.

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