Thermal management system of hydrogen hybrid power locomotive and control method

Abstract

The invention discloses a hydrogen hybrid power locomotive thermal management system and a control method, the hydrogen hybrid power locomotive thermal management system comprises a fuel cell thermal management system, a power battery thermal management system and an intermediate heat exchange device, and the power battery thermal management system comprises a power battery cooling liquid circulation loop. The power battery cooling liquid circulation loop comprises a power battery cooling liquid main loop, a power battery cooling liquid heating branch, a power battery cooling liquid heat exchange branch, a first electronic three-way valve and a second electronic three-way valve, and a first radiator is arranged on the power battery cooling liquid main loop; and the power battery cooling liquid heating branch, the power battery cooling liquid heat exchange branch and the first radiator are connected in parallel. The cooling liquid of the power battery can be heated by using the waste heat of the fuel battery, and when the waste heat is insufficient, the cooling liquid can be heated through the power battery cooling liquid heating branch, so that the influence on the temperature of the fuel battery can be reduced, and the fuel battery is maintained to operate at a normal temperature.

Description

Technical Field

[0001] The present invention relates to the technical field of hybrid power locomotives, and in particular to a thermal management system and a control method for a hydrogen hybrid power locomotive. Background Art

[0002] The thermal management system of hydrogen hybrid locomotive mainly includes fuel cell thermal management system and power battery thermal management system to ensure the safe and reliable operation of fuel cell and power battery within a certain temperature range. The normal operating temperature of fuel cell is generally between 70-90℃, and the power battery is usually a lithium-ion battery, and its normal operating temperature is generally between 0-45℃.

[0003] In low temperature environments, the charging and discharging performance of power batteries is affected, which can easily lead to a decrease in battery capacity and safety hazards, so a thermal management system is needed to manage the thermal performance of power batteries. During operation, fuel cells generate a lot of heat, which is usually discharged to the environment through a radiator.

[0004] Therefore, how to ensure the reliable operation of fuel cells and power batteries is a technical problem that needs to be urgently solved by those skilled in the art. Summary of the invention

[0005] The purpose of the present invention is to provide a hydrogen hybrid locomotive thermal management system and control method, which can effectively solve the problem of low-temperature starting of power batteries and improve the safe operation reliability of fuel cells and power batteries.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A thermal management system for a hydrogen hybrid locomotive, comprising:

[0008] A fuel cell thermal management system, the fuel cell thermal management system comprising a fuel cell coolant circulation loop;

[0009] A power battery thermal management system, the power battery thermal management system comprising a power battery coolant circulation loop, the power battery coolant circulation loop comprising a power battery coolant main loop, a power battery coolant heating branch, a power battery coolant heat exchange branch, a first electronic three-way valve and a second electronic three-way valve, the power battery coolant main loop is provided with a first radiator, the power battery coolant heating branch, the power battery coolant heat exchange branch and the first radiator are connected in parallel, the first electronic three-way valve is connected to the power battery coolant main loop, the liquid inlet of the second electronic three-way valve is connected to a liquid outlet of the first electronic three-way valve, and the two liquid outlets of the second electronic three-way valve are respectively connected to the power battery coolant heating branch and the power battery coolant heat exchange branch;

[0010] An intermediate heat exchange device, the intermediate heat exchange device includes a fuel cell coolant heat exchange channel and a power battery coolant heat exchange channel, the fuel cell coolant heat exchange channel is connected to the fuel cell coolant circulation loop, and the power battery coolant heat exchange channel is connected to the power battery coolant heat exchange branch.

[0011] In some embodiments, a first temperature sensor is provided on the fuel cell coolant circulation loop, and the first temperature sensor is used to detect the temperature of the coolant flowing out of the fuel cell coolant heat exchange channel.

[0012] In some embodiments, a second temperature sensor and a third temperature sensor are provided on the power battery coolant main circuit, the second temperature sensor is used to detect the coolant inlet temperature of the power battery, and the third temperature sensor is used to detect the coolant outlet temperature of the power battery.

[0013] In some embodiments, a fourth temperature sensor and a fifth temperature sensor are provided on the fuel cell coolant circulation loop, the fourth temperature sensor is used to detect the coolant inlet temperature of the fuel cell, and the fifth temperature sensor is used to detect the coolant outlet temperature of the fuel cell.

[0014] In some embodiments, the hydrogen hybrid locomotive thermal management system further includes a controller connected to the first electronic three-way valve, the second electronic three-way valve, the first temperature sensor, the second temperature sensor, the third temperature sensor, the fourth temperature sensor, and the fifth temperature sensor.

[0015] In some embodiments, the fuel cell coolant circulation loop is provided with a first water pump, a third electronic three-way valve and a second radiator in sequence, one outlet of the third electronic three-way valve is connected to the second radiator, and the other outlet is connected to a fuel cell coolant heating branch, and the fuel cell coolant heating branch is connected in parallel with the second radiator.

[0016] In some embodiments, a first electric heater is provided on the power battery coolant heating branch, and a second electric heater is provided on the fuel cell coolant heating branch.

[0017] In some embodiments, a second water pump is provided on the power battery coolant main circuit, the liquid inlet of the second water pump is connected to the coolant outlet of the power battery, the liquid outlet of the second water pump is connected to the liquid inlet of the first electronic three-way valve, and the outlet of the first radiator is connected to the coolant inlet of the power battery.

[0018] In some embodiments, a first water tank is connected to the main power battery coolant circuit, and the first water tank is used to replenish coolant to the main power battery coolant circuit; a second water tank is connected to the fuel cell coolant circulation circuit, and the second water tank is used to replenish coolant to the fuel cell coolant circulation circuit.

[0019] A control method for a hydrogen hybrid electric locomotive thermal management system is applied to any of the above hydrogen hybrid electric locomotive thermal management systems, and the control method comprises the following steps:

[0020] Obtain the temperature of the power battery and fuel cell;

[0021] Determining whether the temperature of the power battery is lower than a preset power battery temperature threshold;

[0022] If not, heat is dissipated through the first heat sink;

[0023] If yes, determining whether the temperature of the fuel cell is lower than a preset temperature threshold of the fuel cell;

[0024] If not, the power battery coolant heat exchange branch is switched to be connected to the power battery coolant main circuit, so as to perform heat exchange through the fuel cell coolant heat exchange channel and the power battery coolant heat exchange channel;

[0025] If so, the power battery coolant heating branch is switched to be connected to the power battery coolant main circuit.

[0026] Compared with the prior art, the above technical solution has the following advantages:

[0027] A thermal management system and control method for a hydrogen hybrid locomotive provided by the present invention, in a specific working process, when the power battery is cold started, the first electronic three-way valve is switched to connect the power battery coolant main circuit with the second electronic three-way valve, at which time the coolant does not pass through the first radiator, and the second electronic three-way valve is switched to connect the first electronic three-way valve with the power battery coolant heating branch and / or the power battery coolant heat exchange branch. When connected with the power battery coolant heat exchange branch, the power battery coolant can be heated by utilizing the waste heat of the fuel cell. When the waste heat of the fuel cell is insufficient, the power battery coolant can be connected with the power battery coolant heating branch, at which time the temperature impact on the fuel cell can be reduced, so that the fuel cell can be maintained at a normal temperature. In addition, the opening sizes of the two outlets of the second electronic three-way valve can be controlled to realize the power battery coolant flow distribution of the power battery coolant heating branch and the power battery coolant heat exchange branch. At this time, the power battery coolant can be heated by utilizing the waste heat of the fuel cell and the power battery coolant heat exchange branch at the same time, so that the thermal management requirements of the fuel cell and the power battery under various working conditions can be realized, and the reliability of the system can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0029] Figure 1 A schematic diagram of the principle of a hydrogen hybrid locomotive thermal management system provided in a specific embodiment of the present invention.

[0030] The reference numerals are as follows:

[0031] 100-fuel cell thermal management system, 1001-fuel cell coolant circulation loop, 1002-coolant heating branch, 101-fuel cell, 102-fifth temperature sensor, 103-second water tank, 104-first water pump, 105-first temperature sensor, 106-third electronic three-way valve, 107-second radiator, 108-second electric heater, 109-pressure sensor, 110-fourth temperature sensor;

[0032] 200-power battery thermal management system, 2001-power battery coolant main circuit, 2002-power battery coolant heat exchange branch, 2003-power battery coolant heating branch, 201-power battery, 202-third temperature sensor, 203-first water tank, 204-second water pump, 205-first electronic three-way valve, 206-second electronic three-way valve, 207-first electric heater, 208-first radiator, 209-second temperature sensor;

[0033] 300-Intermediate heat exchange device. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Please refer to Figure 1 , Figure 1 A schematic diagram of the principle of a hydrogen hybrid locomotive thermal management system provided in a specific embodiment of the present invention.

[0036] A hydrogen hybrid locomotive thermal management system provided in an embodiment of the present invention comprises: a fuel cell thermal management system 100, a power battery thermal management system 200 and an intermediate heat exchange device, wherein the fuel cell thermal management system 100 comprises a fuel cell coolant circulation loop 1001; the power battery thermal management system 200 comprises a power battery coolant circulation loop, the power battery coolant circulation loop comprises a power battery coolant main loop 2001, a power battery coolant heating branch 2003, a power battery coolant heat exchange branch 2002, a first electronic three-way valve 205 and a second electronic three-way valve 206, a first radiator 208 is provided on the power battery coolant main loop 2001, the power battery coolant heating branch 2003, the power battery coolant heat exchange branch 2002 and the first radiator 208 are connected in parallel, and the first electronic three-way valve 205 is connected to the power battery coolant main loop 2001 The liquid inlet of the second electronic three-way valve 206 is connected to a liquid outlet of the first electronic three-way valve 205, and the two liquid outlets of the second electronic three-way valve 206 are respectively connected to the power battery coolant heating branch 2003 and the power battery coolant heat exchange branch 2002; the intermediate heat exchange device includes a fuel cell coolant heat exchange channel and a power battery coolant heat exchange channel, the fuel cell coolant heat exchange channel is connected to the fuel cell coolant circulation loop 1001, and the power battery coolant heat exchange channel is connected to the power battery coolant heat exchange branch 2002. The fuel cell coolant heat exchange channel and the power battery coolant heat exchange channel can exchange heat. For example, when the coolant temperature of the fuel cell 101 is high, heat can be transferred to the power battery coolant heat exchange channel. The intermediate heat exchange device is a liquid-liquid heat exchange device, which can be a plate heat exchanger, a sleeve heat exchanger, a shell and tube heat exchanger or other forms of heat exchangers.In a specific working process, when the power battery 201 is cold started, the first electronic three-way valve 205 is switched to connect the power battery coolant main circuit 2001 with the second electronic three-way valve 206. At this time, the coolant does not pass through the first radiator 208. The second electronic three-way valve 206 is switched to connect the first electronic three-way valve 205 with the power battery coolant heating branch 2003 and / or the power battery coolant heat exchange branch 2002. For example, when connected to the power battery coolant heat exchange branch 2002, the power battery coolant can be heated by the waste heat of the fuel cell 101. When the waste heat of the fuel cell 101 is insufficient, the power battery coolant can be connected to the power battery coolant. The liquid heating branch 2003 is connected, and the temperature impact on the fuel cell 101 can be reduced at this time, so that the fuel cell 101 can be maintained at a normal temperature. In addition, the opening sizes of the two outlets of the second electronic three-way valve 206 can be controlled to realize the power battery coolant flow distribution of the power battery coolant heating branch 2003 and the power battery coolant heat exchange branch 2002. At this time, the waste heat of the fuel cell 101 and the power battery coolant heat exchange branch 2002 can be used to heat the power battery coolant at the same time. Therefore, the thermal management requirements of the fuel cell 101 and the power battery 201 under various working conditions can be met, and the reliability of the system can be improved.

[0037] In some embodiments, a first temperature sensor 105 is provided on the fuel cell coolant circulation loop 1001, and the first temperature sensor 105 is used to detect the temperature of the coolant flowing out of the fuel cell coolant heat exchange channel. When the temperature of the fuel cell coolant is low, the opening of the second electronic three-way valve 206 can be appropriately reduced to reduce the power battery coolant in the power battery coolant heat exchange branch 2002, or to close the power battery coolant heat exchange branch 2002.

[0038] In some embodiments, the power battery coolant main circuit 2001 is provided with a second temperature sensor 209 and a third temperature sensor 202. The second temperature sensor 209 is used to detect the coolant inlet temperature of the power battery, and the third temperature sensor 202 is used to detect the coolant outlet temperature of the power battery. When the coolant inlet temperature is lower than the set value, the power battery coolant heating branch 2003 and / or the power battery coolant heat exchange branch 2002 can be opened; during the operation of the power battery, when the coolant outlet temperature is higher than the set value, the first radiator 208 can be opened to dissipate the heat of the coolant, and then cool the power battery through the coolant to ensure that the power battery operates at a normal temperature.

[0039] In some embodiments, a fourth temperature sensor 110 and a fifth temperature sensor 102 are provided on the fuel cell coolant circulation loop 1001. The fourth temperature sensor 110 is used to detect the coolant inlet temperature of the fuel cell, and the fifth temperature sensor 102 is used to detect the coolant outlet temperature of the fuel cell. The fourth temperature sensor 110 and the fifth temperature sensor 102 can detect the coolant inlet and outlet temperatures of the fuel cell 101, so as to control whether to cool or heat the coolant, so as to ensure the reliable operation of the fuel cell 101.

[0040] In some embodiments, the thermal management system of the hydrogen hybrid locomotive further includes a controller, which is connected to the first electronic three-way valve 205, the second electronic three-way valve 206, the first temperature sensor 105, the second temperature sensor 209, the third temperature sensor 202, the fourth temperature sensor 110, and the fifth temperature sensor 102. The first electronic three-way valve 205 and the second electronic three-way valve 206 can be automatically controlled by the controller, thereby improving the automatic management level of the system.

[0041] In some embodiments, the fuel cell coolant circulation loop 1001 is provided with a first water pump 104, a third electronic three-way valve 106, and a second radiator 107 in sequence, the intermediate heat exchange device is located between the first water pump 104 and the third electronic three-way valve 106, one outlet of the third electronic three-way valve 106 is connected to the second radiator 107, and the other outlet is connected to the fuel cell coolant heating branch 1002, and the fuel cell coolant heating branch 1002 is connected in parallel with the second radiator 107. When the fuel cell needs to be cooled, the third electronic three-way valve 106 switches to the intermediate heat exchange device to be connected to the second radiator 107, and the fuel cell coolant heating branch 1002 is closed at the same time, and the coolant after the heat is dissipated by the second radiator 107 flows back to the fuel cell to cool the fuel cell, wherein a pressure sensor 109 can be provided on the pipeline between the second radiator 107 and the fuel cell to detect the pressure of the coolant entering the fuel cell 101, thereby ensuring the safety of the coolant circulation. When the fuel cell needs to be heated, the third electronic three-way valve 106 is switched to the intermediate heat exchange device to connect with the fuel cell coolant heating branch 1002, and the second radiator 107 is closed at the same time. The coolant can be heated through the fuel cell coolant heating branch 1002, and the heated coolant can flow back to the fuel cell 101 to facilitate starting the fuel cell 101 in a low temperature environment.

[0042] In some embodiments, a first electric heater 207 is provided on the power battery coolant heating branch 2003, and a second electric heater 108 is provided on the fuel cell coolant heating branch 1002, wherein the first electric heater 207 and the second electric heater 108 may be PTC heaters.

[0043] In some embodiments, a second water pump 204 is provided on the power battery coolant main loop 2001, the liquid inlet of the second water pump 204 is connected to the coolant outlet of the power battery 201, the liquid outlet of the second water pump 204 is connected to the liquid inlet of the first electronic three-way valve 205, and the outlet of the first radiator 208 is connected to the coolant inlet of the power battery 201. When the power battery 201 needs to dissipate heat, the second water pump 204 works to realize the coolant circulation in the power battery coolant main loop 2001.

[0044] In some embodiments, a first water tank 203 is connected to the power battery coolant main loop 2001, and the first water tank 203 is located between the power battery 201 and the second water pump 204. The first water tank 203 is used to replenish coolant into the power battery coolant main loop 2001 to maintain its internal pressure; a second water tank 103 is connected to the fuel cell coolant circulation loop 1001, and the second water tank 103 is located between the fuel cell and the first water pump 104. The second water tank 103 is used to replenish coolant into the fuel cell coolant circulation loop 1001 to maintain its internal pressure.

[0045] An embodiment of the present invention further provides a control method for a hydrogen hybrid electric locomotive thermal management system, which is applied to the hydrogen hybrid electric locomotive thermal management system provided in any of the above embodiments. The control method comprises the following steps:

[0046] Get the temperature of the power battery and fuel cell.

[0047] Determine whether the temperature of the power battery is lower than a preset temperature threshold of the power battery.

[0048] If not, the heat is dissipated through the first radiator 208 to ensure that the power battery operates at a normal temperature.

[0049] If the temperature of the power battery is lower than the preset temperature threshold of the power battery, it is determined whether the temperature of the fuel cell is lower than the preset temperature threshold of the fuel cell.

[0050] If not, the power battery coolant heat exchange branch 2002 is switched to communicate with the power battery coolant main circuit 2001, so as to exchange heat through the fuel cell coolant heat exchange channel and the power battery coolant heat exchange channel. When the power battery is cold started, the coolant of the power battery needs to be heated. Since the heat of the coolant of the power battery comes from the fuel cell coolant heat exchange channel in the intermediate heat exchange device, and the heat of the intermediate heat exchange device comes from the fuel cell, that is, by using the heat of the fuel cell to heat the power battery, the cold start of the power battery can be achieved, which can effectively save resources.

[0051] If the temperature of the fuel cell is lower than the preset temperature threshold of the fuel cell, it means that the heat of the fuel cell is low at this time. If the heat of the fuel cell continues to be used, it will affect the normal operation of the fuel cell. At this time, the power battery coolant heating branch 2003 can be switched to connect with the power battery coolant main circuit 2001 to heat the coolant through the power battery coolant heating branch 2003.

[0052] In summary, the hydrogen hybrid locomotive thermal management system provided by the present invention has the following problems during operation:

[0053] The fuel cell needs to dissipate heat: when the fuel cell is running, it converts chemical energy into thermal energy, causing the temperature of the fuel cell stack to rise. At this time, the first water pump 104 needs to be started to cool the stack with coolant. The coolant cools down after passing through the second radiator 107 to dissipate heat, and the coolant flows back to the fuel cell to maintain the normal operating temperature of the fuel cell.

[0054] The fuel cell needs to be heated: When the fuel cell is started cold or cold-started at low temperature, the coolant temperature is lower than the coolant inlet temperature setting value of the fuel cell, and the third electronic three-way valve 106 will switch to the coolant heating branch 1002, and the coolant will be heated by the second electric heater 108. After the heated coolant reaches the coolant inlet temperature setting value, the fuel cell starts.

[0055] The power battery needs heat dissipation: When the power battery is charged and discharged normally, heat is generated. When the internal temperature of the power battery is too high, heat dissipation is required. The second water pump 204 is started, and the temperature of the coolant rises after heat exchange with the power battery. After heat is dissipated through the first radiator 208, the temperature of the coolant decreases, and the coolant re-enters the power battery for heat dissipation to keep the power battery at a normal temperature.

[0056] The power battery needs to be heated: Under low temperature conditions, when the temperature of the power battery is lower than the set value, the coolant enters the first electronic three-way valve 205 through the second water pump 204, and the first electronic three-way valve 205 is switched to communicate with the second electronic three-way valve 206. At this time, the second electronic three-way valve 206 has two outlet paths to choose from. When the fuel cell thermal management system 100 has the ability to recover waste heat, the second electronic three-way valve 206 is switched to communicate with the power battery coolant heat exchange branch 2002. At this time, the coolant will pass through the intermediate heat exchange device and heat the power battery after heat exchange. If the coolant inlet temperature of the power battery is lower than the set value, it will affect the heating effect of the power battery. At this time, the second electronic three-way valve 206 can also be switched to communicate with the power battery coolant heating branch 2003, wherein the coolant flow distribution entering the power battery coolant heating branch 2003 and the power battery coolant heat exchange branch 2002 can be adjusted by the second electronic three-way valve 206. At this time, the coolant can be heated in two ways to increase the coolant temperature. In addition, if the coolant inlet temperature of the fuel cell is lower than the set value, the second electronic three-way valve 206 will also adjust the coolant flow distribution entering the power battery coolant heating branch 2003 and the power battery coolant heat exchange branch 2002, and use the power battery coolant heating branch 2003 to heat the coolant, reduce the heat absorption from the intermediate heat exchange device, and reduce the normal operation of the fuel cell. When the fuel cell thermal management system 100 does not have the waste heat recovery capability, the second electronic three-way valve 206 is switched to be fully connected to the power battery coolant heating branch 2003 to heat the coolant through the first electric heater 207.

[0057] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0058] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0059] The above is a detailed introduction to a hydrogen hybrid locomotive thermal management system and control method provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A thermal management system for a hydrogen hybrid locomotive, characterized in that: include: A fuel cell thermal management system, the fuel cell thermal management system comprising a fuel cell coolant circulation loop; A power battery thermal management system, the power battery thermal management system comprising a power battery coolant circulation loop, the power battery coolant circulation loop comprising a power battery coolant main loop, a power battery coolant heating branch, a power battery coolant heat exchange branch, a first electronic three-way valve and a second electronic three-way valve, the power battery coolant main loop is provided with a first radiator, the power battery coolant heating branch, the power battery coolant heat exchange branch and the first radiator are connected in parallel, the first electronic three-way valve is connected to the power battery coolant main loop, the liquid inlet of the second electronic three-way valve is connected to a liquid outlet of the first electronic three-way valve, and the two liquid outlets of the second electronic three-way valve are respectively connected to the power battery coolant heating branch and the power battery coolant heat exchange branch; An intermediate heat exchange device, the intermediate heat exchange device includes a fuel cell coolant heat exchange channel and a power battery coolant heat exchange channel, the fuel cell coolant heat exchange channel is connected to the fuel cell coolant circulation loop, and the power battery coolant heat exchange channel is connected to the power battery coolant heat exchange branch.

2. The hydrogen hybrid locomotive thermal management system according to claim 1, characterized in that: The fuel cell coolant circulation loop is provided with a first temperature sensor, and the first temperature sensor is used to detect the temperature of the coolant flowing out of the fuel cell coolant heat exchange channel.

3. The hydrogen hybrid locomotive thermal management system according to claim 2, characterized in that: The power battery coolant main circuit is provided with a second temperature sensor and a third temperature sensor, the second temperature sensor is used to detect the coolant inlet temperature of the power battery, and the third temperature sensor is used to detect the coolant outlet temperature of the power battery.

4. The hydrogen hybrid locomotive thermal management system according to claim 3, characterized in that: The fuel cell coolant circulation loop is provided with a fourth temperature sensor and a fifth temperature sensor. The fourth temperature sensor is used to detect the coolant inlet temperature of the fuel cell, and the fifth temperature sensor is used to detect the coolant outlet temperature of the fuel cell.

5. The hydrogen hybrid locomotive thermal management system according to claim 4, characterized in that: The hydrogen hybrid locomotive thermal management system further includes a controller connected to the first electronic three-way valve, the second electronic three-way valve, the first temperature sensor, the second temperature sensor, the third temperature sensor, the fourth temperature sensor, and the fifth temperature sensor.

6. The hydrogen hybrid locomotive thermal management system according to claim 1, characterized in that: The fuel cell coolant circulation loop is provided with a first water pump, a third electronic three-way valve and a second radiator in sequence, one outlet of the third electronic three-way valve is connected to the second radiator, and the other outlet is connected to a fuel cell coolant heating branch, and the fuel cell coolant heating branch is connected in parallel with the second radiator.

7. The hydrogen hybrid locomotive thermal management system according to claim 6, characterized in that: The power battery coolant heating branch is provided with a first electric heater, and the fuel cell coolant heating branch is provided with a second electric heater.

8. The hydrogen hybrid locomotive thermal management system according to claim 6, characterized in that: A second water pump is provided on the power battery coolant main circuit, the liquid inlet of the second water pump is connected to the coolant outlet of the power battery, the liquid outlet of the second water pump is connected to the liquid inlet of the first electronic three-way valve, and the outlet of the first radiator is connected to the coolant inlet of the power battery.

9. The hydrogen hybrid locomotive thermal management system according to claim 8, characterized in that: A first water tank is connected to the main power battery coolant circuit, and the first water tank is used to replenish coolant to the main power battery coolant circuit; a second water tank is connected to the fuel cell coolant circulation circuit, and the second water tank is used to replenish coolant to the fuel cell coolant circulation circuit.

10. A control method for a hydrogen hybrid electric locomotive thermal management system, applied to the hydrogen hybrid electric locomotive thermal management system according to any one of claims 1 to 9, characterized in that: The control method comprises the following steps: Obtain the temperature of the power battery and fuel cell; Determining whether the temperature of the power battery is lower than a preset power battery temperature threshold; If not, heat is dissipated through the first heat sink; If yes, determining whether the temperature of the fuel cell is lower than a preset temperature threshold of the fuel cell; If not, the power battery coolant heat exchange branch is switched to be connected to the power battery coolant main circuit, so as to perform heat exchange through the fuel cell coolant heat exchange channel and the power battery coolant heat exchange channel; If so, the power battery coolant heating branch is switched to be connected to the power battery coolant main circuit.

Images