Thermal management system and vehicle

Abstract

The embodiment of the invention provides a thermal management system and a vehicle. A refrigerant circulation loop in the heat management system comprises a compressor and a battery branch. The battery branch comprises an intermediate heat exchanger and a battery heat exchanger; the intermediate heat exchanger comprises a first refrigerant flow channel and a second refrigerant flow channel; two ports of a refrigerant flow channel of the battery heat exchanger are respectively communicated with first ports of the first refrigerant flow channel and the second refrigerant flow channel; a refrigerant outlet of the compressor communicates with a second port of the second refrigerant flow channel. When a battery is subjected to heating management, an over-high-temperature refrigerant flowing out of the compressor firstly flows through the second refrigerant flow channel of the intermediate heat exchanger, and heat is transferred to a refrigerant which flows through the first refrigerant flow channel and is subjected to heat release and cooling through the intermediate heat exchanger so as to be cooled; the problem that the temperature difference of cells in different areas of the battery pack is large due to the fact that over-high-temperature refrigerants heat the battery pack through the battery heat exchanger can be solved. In addition, heat loss can be reduced by arranging the intermediate heat exchanger, and system energy consumption is reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of heat pumps, and in particular to a thermal management system and a vehicle. Background Art

[0002] Due to the shortcomings of the power battery liquid cooling system, such as complex structure and heavy weight, which increases the vehicle load, many new energy vehicles use a direct heat pump system to achieve the technical solution of power battery thermal management. When the direct heat pump system is in the battery heating mode, the temperature of the refrigerant after compression by the compressor is too high, and it directly enters the battery cooler to dissipate heat, which may also cause a large temperature difference between the cells in different areas of the battery pack. The temperature difference between different cells in the power battery pack is large, resulting in different charging and dissipating rates of different cells, reducing the overall performance of the power battery pack, and potential thermal stability problems. Summary of the invention

[0003] In order to solve the above technical problems, the embodiments of the present disclosure provide a thermal management system, a thermal management system control method, a device, a vehicle and a medium.

[0004] In a first aspect, an embodiment of the present disclosure provides a thermal management system, wherein a refrigerant circulation circuit in the thermal management system includes a compressor and a battery branch;

[0005] The battery branch includes an intermediate heat exchanger and a battery heat exchanger;

[0006] The intermediate heat exchanger includes a first refrigerant flow channel and a second refrigerant flow channel that are independent of each other;

[0007] One port of the refrigerant flow channel of the battery heat exchanger is in communication with the first port of the first refrigerant flow channel, and the other port is in communication with the first port of the second refrigerant flow channel;

[0008] The refrigerant outlet of the compressor is in communication with the second port of the second refrigerant flow channel.

[0009] Optionally, the battery branch circuit further includes a first refrigerant pipeline;

[0010] One end of the first refrigerant pipeline is connected to the refrigerant outlet of the compressor, and the other end is connected to the second port of the second refrigerant flow channel;

[0011] The first refrigerant pipeline includes a first stop valve, which is opened in the target working mode to allow the circulating refrigerant flowing out of the compressor refrigerant outlet to flow to the second refrigerant flow channel.

[0012] Optionally, the battery branch further includes a first throttle valve;

[0013] One port of the coolant flow channel of the battery heat exchanger is communicated with the first port of the first coolant flow channel through the first throttle valve.

[0014] Optionally, the battery branch circuit further includes a second refrigerant pipeline;

[0015] One end of the second refrigerant pipeline is connected to the second port of the second refrigerant flow channel, and the other end is connected to the refrigerant inlet of the compressor in the refrigerant circulation loop;

[0016] The second refrigerant pipeline includes a second stop valve, which is opened in the target working mode to allow the refrigerant flowing through the first refrigerant flow channel and the second refrigerant flow channel in sequence to flow back to the compressor.

[0017] Optionally, the refrigerant circulation loop further includes a cabin cooling branch;

[0018] The cabin cooling branch includes a cabin evaporator and a second throttle valve;

[0019] The inlet of the refrigerant flow passage of the cabin evaporator is connected in parallel with the second port of the first refrigerant flow passage through the second throttle valve, and the outlet of the refrigerant flow passage of the cabin evaporator is connected with the refrigerant inlet of the compressor.

[0020] Optionally, the cabin cooling branch further includes a first one-way valve;

[0021] The first one-way valve is disposed at an outlet of a refrigerant flow passage of the cabin evaporator to prevent the refrigerant from flowing back into the cabin evaporator.

[0022] Optionally, the battery branch circuit further includes a third refrigerant pipeline;

[0023] One end of the third refrigerant pipeline is connected to the second port of the first refrigerant flow channel, and the other end is connected to the refrigerant external circulation branch in the refrigerant circulation loop, and the refrigerant external circulation branch is a branch for realizing heat exchange between the refrigerant and other external media;

[0024] The third refrigerant pipeline includes a third stop valve.

[0025] Optionally, a third throttle valve is also provided at the interface where the refrigerant external circulation branch is connected to the third refrigerant pipeline.

[0026] Optionally, the thermal management system further comprises a power unit coolant circulation loop;

[0027] The power unit coolant circulation loop includes a first outdoor heat exchanger and a water-cooled heat exchanger connected in series;

[0028] The water-cooled heat exchanger includes a refrigerant flow channel that serves as at least a portion of a refrigerant external circulation branch in a refrigerant circulation loop, wherein the battery branch is connected in series with the refrigerant external circulation branch.

[0029] Optionally, the refrigerant circulation loop further includes a cabin condenser and a fourth throttle valve;

[0030] The inlet of the cabin condenser refrigerant flow channel is communicated with the refrigerant outlet of the compressor, and the outlet of the cabin condenser refrigerant flow channel is communicated with the inlet of the water-cooled heat exchanger refrigerant flow channel through the fourth throttle valve.

[0031] Optionally, the refrigerant external circulation branch further includes a fourth refrigerant pipeline;

[0032] One end of the fourth refrigerant pipeline is connected to the outlet of the refrigerant flow channel of the water-cooled heat exchanger, and the other end is connected to the refrigerant inlet of the compressor in the refrigerant circulation loop;

[0033] The fourth refrigerant pipeline includes a fourth stop valve.

[0034] Optionally, the refrigerant external circulation branch further includes a second outdoor heat exchanger and a fifth stop valve;

[0035] The inlet of the refrigerant flow channel of the second outdoor heat exchanger is connected to the outlet of the refrigerant flow channel of the water-cooled heat exchanger through the fifth stop valve.

[0036] Optionally, the refrigerant circulation loop further includes a fifth refrigerant pipeline;

[0037] One end of the fifth refrigerant pipeline is connected to the outlet of the refrigerant flow channel of the second outdoor heat exchanger, and the other end is connected to the refrigerant inlet of the compressor in the refrigerant circulation loop;

[0038] The fifth refrigerant pipeline includes a sixth stop valve.

[0039] Optionally, the power unit coolant circulation loop further includes a first three-way valve;

[0040] The first port of the first three-way valve is communicated with the outlet of the coolant flow channel of the water-cooled heat exchanger, the second port of the first three-way valve is communicated with the inlet of the coolant flow channel of the first outdoor heat exchanger, and the third port of the first three-way valve is communicated with the outlet of the coolant flow channel of the first outdoor heat exchanger;

[0041] The first three-way valve is used to bypass the first outdoor heat exchanger in a target operating mode.

[0042] Optionally, the power unit coolant circulation loop also includes an electric heater, which is used to electrically heat the coolant in a target operating mode.

[0043] In a second aspect, an embodiment of the present disclosure also provides a vehicle, comprising a thermal management system as described above.

[0044] Compared with the prior art, the technical solution provided by the embodiments of the present disclosure has the following advantages:

[0045] By adopting the scheme in the disclosed embodiment, when the battery is heated, the over-temperature refrigerant flowing out of the compressor refrigerant first flows through the second refrigerant flow channel of the intermediate heat exchanger, and the heat is transferred to the refrigerant that has released heat and cooled down in the first refrigerant flow channel through the intermediate heat exchanger, which can prevent the over-temperature and high-pressure refrigerant from directly entering the battery heat exchanger, and also prevent the over-temperature refrigerant from heating the battery pack through the battery heat exchanger, causing the battery core temperature in different areas of the battery pack to be greatly different. In addition, by using an intermediate heat exchanger to transfer the heat of the over-temperature and high-pressure refrigerant to the low-temperature and high-pressure refrigerant after cooling down, instead of directly dissipating the heat, the heat loss can be reduced, and the energy consumption of the system can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art description. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor, among which:

[0048] Figure 1 is a schematic diagram of a partial structure of a thermal management system provided by an embodiment of the present disclosure;

[0049] Figure 2 is a schematic diagram of a partial structure of a thermal management system provided in some other embodiments of the present disclosure;

[0050] Figure 3 is a flow chart of a thermal management system control method provided by an embodiment of the present disclosure;

[0051] Figure 4 is a schematic diagram of the cyclic operation of the thermal management system in the battery cooling mode in some embodiments;

[0052] Figure 5 is a schematic diagram of the cycle operation of the thermal management system in the combined cooling mode in some embodiments;

[0053] Figure 6 is a schematic diagram of the cycle operation of the thermal management system in a cabin cooling mode in some embodiments;

[0054] Figure 7 is a schematic diagram of the cycle operation of the thermal management system in the cabin heating mode in some embodiments;

[0055] Figure 8 is a schematic diagram of the cycle operation of the thermal management system in some embodiments in a cabin heating mode achieved by waste heat recovery;

[0056] Fig. 9 is a schematic diagram of the cycle operation of the thermal management system in some embodiments in a mode of heating the battery pack and the cabin simultaneously;

[0057] Fig.10 is a schematic diagram of the cycle operation of the thermal management system in the first single steam dehumidification mode in some embodiments;

[0058] Fig.11 is a schematic diagram of the cycle operation of the thermal management system in the first single steam dehumidification mode in some embodiments;

[0059] Fig.12 is a schematic diagram of a thermal management control device provided by an embodiment of the present disclosure;

[0060] Fig.13 It is a structural diagram of a control device provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0061] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as being limited to the embodiments described herein, which are instead provided for a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not intended to limit the scope of protection of the present disclosure.

[0062] The term "including" and its variations used in this document are open inclusions, that is, "including but not limited to". The term "based on" means "based at least in part on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments". Relevant definitions of other terms will be given in the description below. It should be noted that the concepts of "first", "second", etc. mentioned in this disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0063] It should be noted that the modifications of "one" and "plurality" mentioned in the present disclosure are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0064] In order to solve various negative problems caused by large temperature differences of cells in different areas of a battery pack due to directly using a heat pump system to perform thermal management on the battery, an embodiment of the present disclosure provides a new thermal management system.

[0065] Figure 1 Schematic diagram of a thermal management system provided in an embodiment of the present disclosure. The thermal management system in the embodiment of the present disclosure includes a refrigerant circulation loop. The refrigerant circulation loop is a loop that realizes refrigerant circulation and utilizes the heat absorption and release of the refrigerant during the refrigerant circulation process to realize thermal management of the thermal management object.

[0066] like Figure 1 As shown, in the embodiment of the present disclosure, the refrigerant circulation loop includes a battery branch 110 , a compressor 120 , a liquid storage tank 130 and a refrigerant external circulation branch 140 .

[0067] The battery branch 110 is a branch in the refrigerant circulation loop for thermal management of the battery pack, and can perform cooling management or heating management on the battery pack.

[0068] The compressor 120 is used to compress the low-pressure gaseous refrigerant to form a high-temperature and high-pressure refrigerant.

[0069] The liquid storage tank 130 is a component for storing part of the refrigerant, which is used to balance the different cooling capacity requirements of the refrigerant circulation loop under different thermal management modes. In some embodiments, the liquid storage tank 130 can have a gas-liquid separation function, and the refrigerant returning to the liquid storage tank 130 can be separated into gas and liquid, and the separated gaseous refrigerant is directed to the compressor 120.

[0070] The refrigerant external circulation branch 140 is a branch for realizing heat exchange between the refrigerant and the external environment. If the thermal management system performs heating management on the battery pack, that is, uses high-temperature and high-pressure refrigerant to flow through the battery branch 110 to heat the battery pack, the refrigerant external circulation branch 140 is used to realize the high-temperature and high-pressure refrigerant after cooling and absorbs heat and evaporates to become a branch of gaseous refrigerant. If the thermal management system performs cooling management on the battery pack, that is, uses refrigerant to flow through the battery branch 110 for evaporation and heat absorption, the refrigerant external circulation branch 140 is used to dissipate the heat of the high-temperature refrigerant compressed by the compressor 120, so that the high-temperature refrigerant is reduced to a low-temperature refrigerant. The refrigerant external circulation branch 140 can adopt the existing technical structure, or it can adopt the structure analyzed in the following embodiments, which will not be expanded in this embodiment.

[0071] In the disclosed embodiment, the battery branch 110 includes an intermediate heat exchanger 111 and a battery heat exchanger 112. One port of the refrigerant flow channel of the battery heat exchanger 112 is connected to the first port of the first refrigerant flow channel, and the other port of the refrigerant flow channel of the battery heat exchanger 112 is connected to the first port of the second refrigerant flow channel.

[0072] like Figure 1 As shown, the refrigerant outlet of the compressor 120 can be directly connected to the battery branch 110. Specifically, the refrigerant outlet of the compressor 120 can be connected to the second port of the second refrigerant flow channel in the intermediate heat exchanger 111. In addition, the second port of the first refrigerant flow channel of the intermediate heat exchanger 111 can be connected to the refrigerant inlet of the refrigerant external circulation branch 140.

[0073] In the disclosed embodiment, the thermal management system can realize the heating management of the battery. When the thermal management system performs the battery heating management, the high-temperature and high-pressure refrigerant compressed by the compressor 120 first flows through the battery branch 110, and then flows from the battery branch 110 into the refrigerant external circulation branch 140. When the high-temperature and high-pressure refrigerant flows through the battery branch 110, it flows through the second refrigerant flow channel of the intermediate heat exchanger 111, the refrigerant flow channel of the battery heat exchanger 112, and the first refrigerant flow channel of the intermediate heat exchanger 111 in sequence.

[0074] As analyzed above, when the battery is heated, the high-temperature and high-pressure refrigerant releases heat at the battery heat exchanger 112 to heat the battery pack. According to the law of conservation of heat, the high-temperature and high-pressure refrigerant releases heat at the battery heat exchanger 112, and its temperature decreases. Accordingly, the temperature of the refrigerant flowing out of the battery heat exchanger 112 and flowing into the first refrigerant flow channel of the intermediate heat exchanger 111 (here it is assumed that the refrigerant becomes a low-temperature and high-pressure refrigerant after releasing heat at the battery heat exchanger 112) is lower than the temperature of the refrigerant (hereinafter referred to as the over-temperature and high-pressure refrigerant) flowing from the second refrigerant flow channel of the intermediate heat exchanger 111 into the refrigerant flow channel of the battery heat exchanger 112. Due to the temperature difference, the over-temperature and high-pressure refrigerant in the second refrigerant flow channel will release heat at the intermediate heat exchanger 111, and transfer the heat to the low-temperature and high-pressure refrigerant in the first refrigerant flow channel through the heat exchange tube wall of the intermediate heat exchanger 111.

[0075] It is by utilizing the temperature difference between the refrigerants in the second refrigerant flow channel and the first refrigerant flow channel of the intermediate heat exchanger 111 that heat is transferred from the over-temperature high-temperature and high-pressure refrigerant in the second refrigerant flow channel to the low-temperature and high-pressure refrigerant in the first refrigerant cold flow channel, thereby cooling the high-temperature and high-pressure refrigerant. When the battery is heated, it is prevented from directly entering the battery heat exchanger 112, thereby preventing the over-temperature refrigerant from heating the battery pack through the battery heat exchanger 112, causing the temperature difference of the battery cells in different areas of the battery pack to be large. In addition, by using the intermediate heat exchanger 111 to transfer the heat of the over-temperature and high-pressure refrigerant to the cooled low-temperature and high-pressure refrigerant, rather than directly dissipating the heat, it is possible to reduce heat loss in the low-temperature working mode and reduce system energy consumption.

[0076] like Figure 1As shown, the thermal management system provided by the embodiment of the present disclosure further includes a first throttle valve 113 in the battery branch 110. One port of the refrigerant flow channel of the battery heat exchanger 112 is connected to the first port of the first refrigerant flow channel of the intermediate heat exchanger 111 through the first throttle valve 113.

[0077] In addition to the aforementioned heating management, the thermal management system provided in the embodiments of the present disclosure can also implement cooling management for the battery pack. Figure 2 As shown, when the thermal management system performs cooling management on the battery pack, the second port of the second refrigerant flow channel in the intermediate heat exchanger 111 can be connected to the liquid storage tank.

[0078] In the refrigeration management, the high-temperature and high-pressure refrigerant compressed by the compressor 120 dissipates heat in the refrigerant external circulation branch 140 and becomes a low-temperature and high-pressure mixed refrigerant. Then, the low-temperature and high-pressure mixed refrigerant enters the battery branch 110 to absorb heat and become a gaseous refrigerant, and finally the gaseous refrigerant flows back to the liquid storage tank 130. When the low-temperature and high-pressure mixed refrigerant flows through the battery branch 110, it passes through the first refrigerant flow channel of the intermediate heat exchanger 111, the first throttle valve 113, the refrigerant flow channel of the battery heat exchanger 112, and the second refrigerant flow channel of the intermediate heat exchanger 111 in sequence. By controlling the throttling opening of the first throttle valve 113, the low-temperature and high-pressure mixed refrigerant can be throttled to a low-temperature and low-pressure liquid refrigerant that enters the refrigerant flow channel of the battery heat exchanger 112 and the second refrigerant flow channel of the intermediate heat exchanger 111. The low-temperature and low-pressure liquid refrigerant absorbs heat and evaporates in the refrigerant flow channel of the battery heat exchanger 112 to become a gaseous refrigerant, thereby realizing the refrigeration management of the battery pack.

[0079] In the disclosed embodiment, by appropriately increasing the throttling opening of the first throttle valve 113, the throttled low-temperature and low-pressure liquid refrigerant does not absorb heat and evaporate in time at the intermediate heat exchanger 111, but absorbs heat and evaporates at the second refrigerant flow channel flowing to the intermediate heat exchanger 111. Since the liquid refrigerant absorbs heat when evaporating, the temperature of the heat exchange tube wall of the intermediate heat exchanger 111 is relatively low. Since the temperature of the low-temperature and high-pressure mixed refrigerant flowing through the first refrigerant flow channel of the intermediate heat exchanger 111 is higher than the temperature of the heat exchange tube wall of the intermediate heat exchanger 111, the low-temperature and high-pressure mixed refrigerant flowing through the first refrigerant flow channel is further cooled, so that the supercooling degree of the low-temperature and high-pressure mixed refrigerant can be further increased, so that the low-temperature and high-pressure mixed refrigerant is further converted into a liquid-phase high-pressure refrigerant. Since the liquid-phase high-pressure refrigerant is easy to distribute, after the liquid-phase refrigerant is throttled by the first throttle valve 113, the liquid-phase refrigerant can be more evenly distributed in the refrigerant flow channel of the intermediate heat exchanger 111.

[0080] As analyzed above, the thermal management system in the embodiment of the present disclosure can realize heating management and cooling management. During heating management and cooling management, the flow direction of the refrigerant in the battery branch 110 is opposite. In order to avoid the flow in the correct flow direction during heating management and cooling management, a pipeline for controlling the flow of the refrigerant in the battery branch 110 is also required in the implementation of the present disclosure.

[0081] Please continue to see Figure 1 , the battery branch 110 may include a first refrigerant pipeline 150. One end of the first refrigerant pipeline 150 is connected to the refrigerant outlet of the compressor 120 in the refrigerant circulation loop, and the other end is connected to the second port of the second refrigerant flow channel. The first refrigerant pipeline 150 is used to guide the high-temperature and high-pressure refrigerant compressed by the compressor 120 to the intermediate heat exchanger 111 when the thermal management system is in the battery heating mode, and perform the heating management of the battery described above.

[0082] like Figure 1 As shown, the first refrigerant pipeline 150 includes a first stop valve 151. The first stop valve 151 is opened in the battery heating mode to allow the circulating refrigerant flowing out of the refrigerant outlet of the compressor 120 to flow to the intermediate heat exchanger 111.

[0083] like Figure 1 As shown, the battery branch 110 in the embodiment of the present disclosure also includes a second refrigerant pipeline 160, which is a circuit for realizing the refrigerant reflux to the liquid storage tank 130. One end of the second refrigerant pipeline 160 is connected to the second port of the second refrigerant flow channel, and the other end is connected to the refrigerant inlet of the liquid storage tank 130 in the refrigerant circulation loop. The second refrigerant pipeline 160 includes a second stop valve 161, which is opened when the battery is refrigerated, so that the refrigerant flowing through the first refrigerant flow channel and the second refrigerant flow channel in sequence flows back to the liquid storage tank 130. The aforementioned target working mode is the battery cooling mode. That is to say, in the battery cooling mode, the refrigerant flowing through the battery heat exchanger 112 and the intermediate heat exchanger 111 flows back to the liquid storage tank 130 through the second refrigerant pipeline 160.

[0084] In some embodiments, the second stop valve 161 located in the second refrigerant pipeline 160 can be a stop valve with a throttling function. In a specific implementation, the second stop valve 161 can be a throttling valve. In the case where the second stop valve 161 is a stop valve with a throttling function, it can be used to throttle the refrigerant returning to the liquid storage tank 130, thereby adjusting the amount of refrigerant in the second refrigerant flow channel in the intermediate heat exchanger 111, and then being able to control the heat absorption of the refrigerant, and adjusting the refrigerant temperature in the first refrigerant flow channel, so that the refrigerant in the first refrigerant flow channel is liquefied as much as possible, and then the refrigerant is evenly distributed in the battery heat exchanger 112.

[0085] Figure 2 Schematic diagram of some structures of thermal management systems provided in other embodiments of the present disclosure. Figure 2 As shown, the refrigerant circulation loop in the thermal management system provided in the embodiment of the present disclosure also includes a battery branch 110, a compressor 120, a liquid storage tank 130, a refrigerant external circulation branch 140, a second refrigerant pipeline 160 and a first refrigerant pipeline 150. In the embodiment of the present disclosure, the battery branch 110 also includes an intermediate heat exchanger 111, a battery heat exchanger 112 and a first throttle valve 113. The positions and connection relationships of the above three components are the same as those in the previous embodiment and will not be repeated here. The following is an analysis of the differences between the embodiment of the present disclosure and the previous embodiment.

[0086] In the disclosed embodiment, the refrigerant circulation loop also includes a cabin cooling branch 170. The cabin cooling branch 170 is a circuit for absorbing heat and cooling the cabin. In certain thermal management working modes, the cabin cooling branch 170 also has a dehumidification function for the cabin (essentially, the dehumidification function is achieved by cooling the air so that saturated water vapor is precipitated from the air). In certain working modes (including the battery cabin cooling mode), the cabin cooling branch 170 is a branch connected in parallel with the battery branch 110.

[0087] The cabin cooling branch 170 includes a cabin evaporator 171 and a second throttle valve 172. Figure 2 As shown, the inlet of the refrigerant flow channel of the cabin evaporator 171 is connected in parallel with the second port of the first refrigerant flow channel through the second throttle valve 172, and the outlet of the refrigerant flow channel of the cabin evaporator 171 is connected with the refrigerant inlet of the liquid storage tank 130. The second throttle valve 172 has a throttling function, which is used to control the flow rate of the refrigerant flowing through the cabin evaporator, thereby controlling the cooling effect at the cabin evaporator.

[0088] It should be noted that in some vehicles, such as unmanned and unoccupied engineering vehicles, the aforementioned cabin cooling branch 170 is not a necessary branch in the thermal management system and can be omitted.

[0089] Please continue to see Figure 2 In the disclosed embodiment, the cabin cooling branch 170 may include a first check valve 173 in addition to the cabin evaporator 171 and the second throttle valve 172. The first check valve 173 is disposed at the outlet of the refrigerant flow channel of the cabin evaporator 171 to prevent the refrigerant from flowing back into the cabin evaporator 171.

[0090] In actual applications, in certain working modes (e.g., in a forced cooling mode during battery fast charging), only the battery branch 110 is needed to cool the battery, and the cabin cooling branch 170 is not needed to cool the cabin. At this time, the refrigerant flowing out of the second refrigerant pipeline 160 may flow back into the cabin evaporator 171 to cool the cabin.

[0091] Please continue to see Figure 2 In the disclosed embodiment, the refrigerant circulation loop also includes a third refrigerant pipeline 180. One end of the third refrigerant pipeline 180 is connected to the second port of the first refrigerant flow channel, and the other end is connected to the refrigerant external circulation branch 140 in the refrigerant circulation loop. The third refrigerant pipeline 180 also includes a third stop valve 181. In the battery heating mode, the third stop valve 181 in the third refrigerant pipeline 180 is opened, and the refrigerant flowing out from the second port of the first refrigerant flow channel of the intermediate heat exchanger 111 in the battery branch 110 flows to the refrigerant external circulation branch 140 via the third refrigerant pipeline 180 to enrich heat in the refrigerant external circulation branch 140.

[0092] Please continue to see Figure 2 In the disclosed embodiment, a third throttle valve 141 is further provided at the interface where the refrigerant external circulation branch 140 communicates with the third refrigerant pipeline 180. The third throttle valve 141 is used to throttle the refrigerant that is about to flow into the refrigerant external circulation branch 140, thereby making the refrigerant in the refrigerant external circulation branch 140 become a low-temperature and low-pressure state, and then can evaporate and absorb heat.

[0093] Please continue to see Figure 2 In the disclosed embodiment, the thermal management system may include a power unit coolant circulation loop 190 in addition to a refrigerant circulation loop. The power unit coolant circulation loop 190 is a coolant loop that uses the circulation of coolant to achieve thermal management of the power unit, or to achieve some other thermal management or heat exchange functions.

[0094] In the disclosed embodiment, the power device coolant circulation loop 190 may include a first outdoor heat exchanger 191 and a water-cooled heat exchanger 192. Preferably, the coolant flow channel outlet of the water-cooled heat exchanger 192 is connected to the coolant flow channel inlet of the first outdoor heat exchanger 191.

[0095] In addition to the coolant flow channel, the water-cooled heat exchanger 192 may also include a refrigerant flow channel that serves as at least part of the refrigerant external circulation branch 140 in the refrigerant circulation loop. In other words, the water-cooled heat exchanger 192 has a refrigerant flow channel for realizing heat exchange of the refrigerant during the external circulation process. In the refrigerant circulation loop, the refrigerant flow channel of the water-cooled heat exchanger 192, as a part of the refrigerant external circulation branch 140, is connected in series with the battery branch 110 in the refrigerant circulation loop. In the disclosed embodiment, by providing the water-cooled heat exchanger 192, heat exchange between the refrigerant in the refrigerant circulation loop and the coolant in the power unit coolant circulation loop 190 can be achieved. Specifically, what type of heat exchange can be achieved by providing the water-cooled heat exchanger 192, and what benefits are achieved by using the aforementioned heat exchange will be further explained in the working mode analysis later.

[0096] In some embodiments of the present disclosure, the refrigerant circulation loop may further include a fourth refrigerant pipeline 200. One end of the fourth refrigerant pipeline 200 is connected to the outlet of the refrigerant flow channel of the water-cooled heat exchanger 192, and the other end is connected to the refrigerant inlet of the liquid storage tank 130 in the refrigerant circulation loop. The fourth refrigerant pipeline 200 includes a fourth stop valve 201. In certain working modes, the fourth stop valve 201 is opened, so that the refrigerant that absorbs heat and evaporates after passing through the water-cooled heat exchanger 192 can directly flow back to the liquid storage tank 130 through the fourth refrigerant pipeline 200, and then flow back to the compressor 120.

[0097] Please continue to see Figure 2 In some embodiments of the present disclosure, the refrigerant circulation loop may further include a cabin condenser 210 and a fourth throttle valve 220. The inlet of the refrigerant flow channel of the cabin condenser 210 is connected to the refrigerant outlet of the compressor 120, and the outlet of the refrigerant flow channel of the cabin condenser 210 is connected to the inlet of the refrigerant flow channel of the water-cooled heat exchanger 192 through the fourth throttle valve 220. In certain working modes, there is a need to heat the cabin, and the cabin air can be heated through the cabin condenser 210.

[0098] In some embodiments of the present disclosure, the refrigerant external circulation branch 140 may further include a second outdoor heat exchanger 142 and a fifth stop valve 143. The inlet of the refrigerant flow channel of the second outdoor heat exchanger 142 is connected to the outlet of the refrigerant flow channel of the water-cooled heat exchanger 192 through the fifth stop valve 143.

[0099] The second outdoor heat exchanger 142 is a heat exchanger used to realize direct heat exchange between the refrigerant in the refrigerant external circulation branch 140 and the air. Combined with its function, it can be seen that by adding the second outdoor heat exchanger 142 on the basis of setting the water-cooled heat exchanger 192 in the refrigerant external circulation branch 140, the heat exchange efficiency and / or heat exchange power between the refrigerant external circulation branch 140 and the outside air can be further improved in certain working modes. In specific implementation, at least the heat exchange power between the refrigerant and the outside air in the battery cooling mode can be improved, which will be analyzed later.

[0100] like Figure 2 As shown, in the embodiment of the present disclosure, the second outdoor heat exchanger 142 can be arranged downstream of the water-cooled heat exchanger 192, that is, the refrigerant flow channel inlet of the second outdoor heat exchanger 142 is connected to the refrigerant flow channel outlet of the water-cooled heat exchanger 192. In actual applications, the temperature of the high-temperature and high-pressure gaseous refrigerant obtained by the compressor 120 compressing the gaseous refrigerant is much higher than the air temperature, but is not much different from the temperature of the coolant in the thermal management branch of the power unit. By arranging the second outdoor heat exchanger 142 downstream of the water-cooled heat exchanger 192, in certain operating modes (for example, in the battery cooling mode), the temperature difference between the coolant and the high-temperature and high-pressure gaseous refrigerant in the water-cooled heat exchanger 192 can be utilized to transfer heat to the coolant in the thermal management branch of the power unit as much as possible, so as to achieve full heat dissipation using the first outdoor heat exchanger 191.

[0101] As before, in certain working modes, the fourth stop valve 201 is opened, so that the refrigerant that absorbs heat and evaporates after passing through the water-cooled heat exchanger 192 can directly flow back to the liquid storage tank 130 through the fourth refrigerant pipeline 200, and then flow back to the compressor 120. At this time, it is necessary to prevent the refrigerant from flowing into the second outdoor heat exchanger 142, so the fifth stop valve 143 needs to be set.

[0102] In the disclosed embodiment, the refrigerant circulation loop may further include a fifth refrigerant pipeline 230. One end of the fifth refrigerant pipeline 230 is connected to the outlet of the refrigerant flow channel of the second outdoor heat exchanger 142, and the other end is connected to the refrigerant inlet of the compressor 120 in the refrigerant circulation loop; the fifth refrigerant pipeline 230 includes a sixth stop valve 231. In certain working modes, the sixth stop valve 231 is opened, and the refrigerant absorbs heat and evaporates in the water-cooled heat exchanger 192 and the second outdoor heat exchanger 142 to become a gaseous refrigerant, and then flows back to the liquid storage tank 130 through the fifth refrigerant pipeline 230, and then flows back to the compressor 120. In actual applications, the sixth stop valve 231 is mostly a solenoid valve, and the actual characteristics of the solenoid valve may not be completely shut down. In certain working modes, the refrigerant may flow back into the second outdoor heat exchanger 142 through the sixth stop valve 231. In order to avoid the aforementioned problem, a second one-way valve 232 is further provided in the fifth refrigerant pipeline 230 . The second one-way valve 232 is used to prevent the refrigerant from flowing in the reverse direction along the fifth refrigerant pipeline 230 .

[0103] like Figure 2 As shown, in the disclosed embodiment, the refrigerant flow channel outlet of the second outdoor heat exchanger 142 is also connected to the second port of the first refrigerant flow channel of the intermediate heat exchanger 111 in the battery branch 110 through a portion of the fifth refrigerant pipeline 230 and the sixth refrigerant pipeline 240. In some working modes, there may be high-pressure refrigerant at the second port of the first refrigerant flow channel, and the high-pressure refrigerant may flow in reverse to the sixth stop valve 231 and directly return to the liquid storage tank 130. In order to avoid the aforementioned problems, a third one-way valve 241 is also provided in the sixth refrigerant pipeline 240, and the third one-way valve 241 is used to prevent the refrigerant from flowing back to the sixth stop valve 231 along the sixth refrigerant pipeline 240.

[0104] like Figure 2 As shown, in the embodiment of the present disclosure, the power unit coolant circulation loop 190 may further include a first three-way valve 193. The first port of the first three-way valve 193 is connected to the coolant flow channel outlet of the water-cooled heat exchanger 192, the second port of the first three-way valve 193 is connected to the coolant flow channel inlet of the first outdoor heat exchanger 191, and the third port of the first three-way valve 193 is connected to the coolant flow channel outlet of the first outdoor heat exchanger 191. In some working modes, the first port and the second port of the first three-way valve 193 are connected, so that the coolant can flow through the first outdoor heat exchanger 191; in other working modes, the first port and the third port of the first three-way valve 193 are connected, so that the first outdoor heat exchanger 191 is bypassed, that is, the coolant no longer flows through the first outdoor heat exchanger 191.

[0105] like Figure 2 As shown, in some embodiments, the power unit coolant circulation loop 190 may further include an electric heater 194. The electric heater 194 is used to electrically heat the coolant in some working modes, thereby increasing the heat of the entire thermal management system. For example, in the ultra-low temperature working mode, the electric heater 194 works to increase the coolant temperature, and then transfers heat to the refrigerant circulation loop, thereby achieving the refrigerant circulation loop heating the battery and the vehicle cabin.

[0106] In addition, if Figure 2 As shown, Figure 2 The thermal management system also includes a water pump 195, a motor heat exchanger 196 and a controller heat exchanger 197 arranged in the power unit coolant circulation loop 190. Because the functions of the corresponding components are well known in the art, their functions will not be analyzed here.

[0107] In addition to providing the aforementioned thermal management system, the embodiment of the present disclosure also provides a thermal management system control method. The thermal management system control method is used to control the thermal management system mentioned above.

[0108] Figure 3 is a flow chart of the thermal management system control method provided by the embodiment of the present disclosure. Figure 3 As shown, the thermal management system control method provided by the embodiment of the present disclosure includes S110 to S120. The thermal management system control method provided by the embodiment of the present disclosure is executed by a control device.

[0109] S110: Determine whether to start thermal management of the battery pack based on the detected temperature of the battery pack; if so, execute S120.

[0110] In the embodiment of the present disclosure, a temperature sensor is provided in the battery pack. When the thermal management system is working, the temperature sensor detects and generates a detection temperature and sends it to the control device. The control device then determines whether thermal management of the battery pack is required based on the detection temperature. Thermal management is cooling management or heating management

[0111] In a specific implementation, the control device determines the type of thermal management to be started for the battery pack based on the detected temperature, and the types include cooling management and heating management. When the detected temperature of the battery pack is higher than the upper limit of the operating temperature of the battery pack, the thermal management is cooling management. When the detected temperature of the battery pack is lower than the lower limit of the operating temperature of the battery pack, the thermal management is heating management.

[0112] S120: Control the refrigerant to flow through the battery pack thermal management branch to achieve heat exchange between the refrigerant and the battery pack.

[0113] When it is determined that thermal management of the battery pack is required, the control device controls the operation of components in the thermal management system so that the refrigerant can pass through the thermal management branch of the battery pack, thereby achieving heat exchange between the refrigerant and the battery pack.

[0114] In specific implementation, controlling the refrigerant to flow through the battery pack thermal management branch requires determining the target state of the refrigerant to flow through the battery pack thermal management branch according to the type of thermal management. For example, when the type of thermal management is cooling management, the cooling refrigerant is controlled to flow through the battery pack thermal management branch; when the type of thermal management is heating management, the heating refrigerant is controlled to flow through the battery pack thermal management branch.

[0115] According to the structural analysis of the thermal management system in the previous article, when the refrigerant flows through the battery pack thermal management branch, it can first undergo heat exchange in the intermediate heat exchanger 111, thereby adjusting the physical properties of the refrigerant, and then allowing the adjusted refrigerant to flow into the battery heat exchanger 112.

[0116] As mentioned above, the control device determines the target state refrigerant flowing through the battery pack thermal management branch according to the type of thermal management. In a specific implementation, when the type of thermal management is cooling management, the control device controls the cooling refrigerant to flow into the battery branch 110 from the second port of the first refrigerant flow channel in the intermediate heat exchanger 111, and to flow out of the battery branch 110 from the second port of the second refrigerant flow channel; and controls the first throttle valve 113 to throttle the cooling refrigerant. The aforementioned cooling refrigerant is a low-temperature and high-pressure refrigerant obtained by condensing the high-temperature and high-pressure refrigerant compressed by the compressor 120 using the refrigerant external circulation branch 140.

[0117] In addition, while controlling the cooling refrigerant to flow through the battery pack thermal management branch, the control device also controls the second stop valve 161 to open and controls the first stop valve 151 to close, so that the refrigerant flowing out of the second port of the second refrigerant flow channel can flow back to the compressor 120 via the second refrigerant pipeline 160.

[0118] In some embodiments, while performing cooling management on the battery, the computing device also executes the following S130 - S140 .

[0119] S130: Determine whether to start cooling management of the cabin based on the detected cabin temperature, air humidity and / or the set cabin temperature; if so, execute S140.

[0120] In the disclosed embodiment, a temperature sensor and a humidity sensor are also provided in the cabin. The control device determines whether the cabin needs to be cooled according to the detected temperature of the cabin, the air humidity, and the cabin setting temperature set by the user. For example, when the detected temperature of the cabin is lower than the cabin setting temperature, the cabin cooling management needs to be started. For another example, if the detected temperature of the cabin is higher than the cabin setting temperature, but the air humidity is too high, the cabin dehumidification management also needs to be started.

[0121] S140: Controlling the cooling refrigerant to flow through the cabin cooling branch, and controlling the second throttle valve to throttle the cooling refrigerant flowing through the cabin cooling branch.

[0122] When it is determined that the cabin needs to be cooled, the control device controls the cooling refrigerant to flow through the cabin cooling branch 170, and uses the second throttle valve 172 to throttle the cooling refrigerant flowing through the cabin condensation branch, thereby allowing the refrigerant to absorb heat and evaporate in the cabin evaporator 171.

[0123] In some embodiments, while managing the cooling of the battery, the control device can also control the second shut-off valve 161 to throttle the refrigerant flowing through the second refrigerant pipeline 160, so as to prevent the refrigerant from flowing out of the intermediate heat exchanger 111 quickly under the action of the high-pressure driving force to impact the liquid storage tank 130 and the compressor 120, while ensuring that the refrigerant has a high retention amount between the battery heat exchanger 112 and the second refrigerant flow channel of the intermediate heat exchanger 111, thereby improving and ensuring a good heat exchange and refrigeration effect.

[0124] While managing the cooling of the battery, the control device will also control the third stop valve 181, the fourth stop valve 201 to close, the sixth stop valve 231, and the fifth stop valve 143 to open, so that the refrigerant compressed by the compressor 120 will flow through the refrigerant flow channels of the water-cooled heat exchanger 192 and the second outdoor heat exchanger 142 in sequence and dissipate heat. In addition, the control device will also control the first port and the second port of the first three-way valve 193 to be connected, so that the condensate flows through the first outdoor heat exchanger 191 after flowing through the water-cooled heat exchanger 192, and then the first external control heat exchanger can be mixed with the second external control heat exchanger to dissipate heat at the same time, thereby improving the heat dissipation performance of the entire thermal management system.

[0125] As mentioned above, the control device determines the target state refrigerant to flow through the battery pack thermal management branch according to the type of thermal management. In a specific implementation, when the type of thermal management is heating management, the control device controls the heating refrigerant to flow into the battery branch 110 from the second port of the second refrigerant flow channel in the intermediate heat exchanger 111, and to flow out of the battery branch 110 from the first port of the first refrigerant flow channel.

[0126] In a specific implementation, the control device controls the first stop valve 151 to open and controls the second stop valve 161 to close, so that the heating refrigerant flowing out from the refrigerant outlet of the compressor 120 in the refrigerant circulation loop flows into the battery branch 110 from the second port of the second refrigerant flow channel, and controls the third throttle valve 141 to throttle the refrigerant entering the refrigerant external circulation branch 140.

[0127] In addition, the control device also controls the third stop valve 181 to open, so that the refrigerant flowing out from the second port of the second refrigerant flow channel flows from the third refrigerant pipeline 180 to the refrigerant external circulation branch 140 .

[0128] In some embodiments, while the control device is executing the heating management of the battery, it also determines the mode type of the heat enrichment mode of the heating management according to the coolant temperature and the ambient temperature. The heat enrichment mode includes the winter heating mode and the waste heat recovery mode. Wherein, when the mode type is the winter heating mode, the fourth stop valve 201 is controlled to be closed, and the fifth stop valve 143 and the sixth stop valve 231 are controlled to be opened; when the mode type is the waste heat recovery mode, the fourth stop valve 201 is controlled to be opened, and the fifth stop valve 143 and the sixth stop valve 231 are controlled to be closed; and the first port and the third port of the first three-way valve 193 are controlled to be connected.

[0129] In order to provide a more detailed introduction to the thermal management system provided by the embodiment of the present disclosure, the following analyzes how the thermal management system works in various working modes. Figure 2 Of course, in certain operating modes, Figure 2 Some components in the thermal management system shown are non-essential components, and accordingly, the thermal management system executing the corresponding working mode may not include non-essential components.

[0130] 1. Battery cooling mode

[0131] Figure 4 The figure is a schematic diagram of the cycle operation of the thermal management system in the battery cooling mode in some embodiments. The battery cooling mode can be a cooling mode in the process of battery heat release when the vehicle is running, or a cooling mode in the process of battery charging when the vehicle is stopped. The core of the cooling mode is to cool the battery and control the battery to be within the set operating temperature range.

[0132] like Figure 4 As shown, in the battery cooling mode: (1) the first stop valve 151 in the first refrigerant pipeline 150 is closed; (2) the third stop valve 181 in the third refrigerant pipeline 180 is closed; (3) the fourth stop valve 201 in the fourth refrigerant pipeline 200 is closed; (4) the sixth stop valve 231 in the fifth refrigerant pipeline 230 is closed; (4) the second stop valve 161 in the second refrigerant pipeline 160 is opened (when the second stop valve 161 has a throttling function, the throttling function is turned on); (5) the fifth stop valve 143 is opened; (6) the first port and the port of the first three-way valve 193 are connected, so that the first outdoor heat exchanger 191 is connected in series to the power unit coolant circulation loop 190; (7) the second throttle valve 172 is closed; (8) the third throttle valve 141 and the fourth throttle valve 220 are fully open.

[0133] In the battery cooling mode, the heat exchange process of the refrigerant circulation loop is as follows: after the gaseous refrigerant is compressed by the compressor 120 into other refrigerants with high temperature and high pressure, the high temperature and high pressure gaseous refrigerant flows through the cabin condenser 210 and then passes through the water-cooled heat exchanger 192, where heat exchange is performed and part of the heat is transferred to the coolant in the power unit coolant circulation loop 190 via the water-cooled heat exchanger 192; then the high temperature and high pressure gaseous refrigerant passes through the fifth stop valve 143 and enters the second outdoor heat exchanger 142, where heat is dissipated to form a low temperature and high pressure mixed refrigerant, at which time the low temperature and high pressure mixed refrigerant may still be a gas-liquid two-phase refrigerant. Then the low temperature and high pressure mixed refrigerant flows into the first refrigerant flow channel of the intermediate heat exchanger 111 via the fifth refrigerant pipeline 230 and the sixth refrigerant pipeline 240. In the first refrigerant flow channel, the low-temperature and high-pressure mixed refrigerant exchanges heat with the low-temperature and low-pressure refrigerant that has passed through the first throttle valve 113 and flows through the battery heat exchanger 112 and the second refrigerant flow channel of the intermediate heat exchanger 111, further releasing heat and becoming a low-temperature and high-pressure mixed refrigerant with a higher degree of supercooling. At this time, the probability of the refrigerant being in the liquid phase is higher. Afterwards, the low-temperature and high-pressure mixed refrigerant is transformed into a low-temperature and low-pressure liquid refrigerant under the throttling effect of the first throttle valve 113 and enters the second refrigerant flow channel of the battery heat exchanger 112 and the intermediate heat exchanger 111 to absorb heat and evaporate, and after passing through the second stop valve 161 and the liquid storage tank 130, it flows back to the compressor 120.

[0134] In the battery cooling mode, the heat exchange process of the power unit coolant circulation loop 190 is as follows: driven by the water pump 195, the coolant flows through the controller heat exchanger 197 and the motor heat exchanger 196. According to the temperature of the controller heat exchanger 197 and the motor heat exchanger 196, the coolant may dissipate heat in the controller heat exchanger 197 and the motor heat exchanger 196, or it may absorb heat (for example, when the vehicle is in high-speed motion, the operating heat generation temperature of the controller and the motor is relatively high, and the coolant absorbs heat in the controller heat exchanger 197 and the motor heat exchanger 196. For another example, when the vehicle is in the external fast charging mode, the controller and the motor are not working. At this time, the coolant temperature may be higher than the motor and the controller, and the coolant will also dissipate heat in the controller heat exchanger 197 and the motor heat exchanger 196). Subsequently, the coolant enters the water-cooled heat exchanger 192 and absorbs heat in the water-cooled heat exchanger 192. The coolant then flows through the first three-way valve 193 through the first outdoor heat exchanger 191 to dissipate heat, and flows back to the water pump 195 to continue the aforementioned cycle.

[0135] 2. Combined cooling mode

[0136] The combined cooling mode is a mode that cools the cabin and the battery at the same time. Figure 5The figure is a schematic diagram of the cycle operation of the thermal management system in the combined cooling mode in some embodiments. The combined cooling mode can be executed when the vehicle is driving or when the vehicle is parked. The core of the combined cooling mode is to cool the battery pack and the cabin air at the same time through the refrigerant, so that the battery temperature and the cabin temperature are in the corresponding set temperature range at the same time.

[0137] In the combined cooling mode, the difference compared to the battery cooling mode is that the second throttle valve 172 in the cabin cooling branch 170 works, so that the low-temperature and high-pressure refrigerant can be throttled to a low-temperature and low-pressure refrigerant that absorbs heat and evaporates in the cabin evaporator 171. The control strategies of other parts of the refrigerant circulation loop and the power unit coolant circulation loop 190 are the same as those in the battery cooling mode and will not be repeated here. For details, please refer to the analysis of the battery cooling mode.

[0138] 3. Cabin cooling mode

[0139] The cabin cooling mode is a mode for cooling only the vehicle cabin. Figure 6 Schematic diagram of the cycle operation of the thermal management system in the cabin cooling mode in some embodiments. Compared with the combined cooling mode, the cooling refrigerant in the cabin cooling mode does not flow through the battery branch 110 and the second refrigerant pipeline 160. Therefore, compared with the combined cooling mode, it only needs to close the first throttle valve 113 and the second stop valve 161. The rest is the same as the combined cooling mode and will not be repeated here. For details, please refer to the analysis of the battery cooling mode and the combined cooling mode in the previous text.

[0140] 4. Cabin heating mode

[0141] The cabin heating mode is a mode in which the cabin is heated by using the second outdoor heat exchanger 142 to enrich heat from the air and using the compressor 120 to generate heat when the ambient temperature is not too low and the power unit coolant circulation loop 190 provides less heat that can be enriched.

[0142] Figure 7 FIG. 1 is a schematic diagram of the cycle operation of the thermal management system in the cabin heating mode in some embodiments. Figure 7 As shown, in the cabin heating mode: (1) the first throttle valve 113 and the second throttle valve 172 are closed; (2) the second stop valve 161 in the second refrigerant pipeline 160 is closed; (3) the first stop valve 151 in the first refrigerant pipeline 150 is closed; (4) the third stop valve 181 in the third refrigerant pipeline 180 is closed; (4) at least one of the third throttle valve 141 or the fourth throttle valve 220 turns on the throttling function and ensures the circulation of the refrigerant; (5) the fourth stop valve 201 in the fourth refrigerant pipeline 200 is closed; (5) the fifth stop valve 143 is opened; (6) the sixth stop valve 231 in the fifth refrigerant pipeline 230 is opened.

[0143] In the cabin heating mode, the heat exchange process of the refrigerant circulation loop is as follows: After the gaseous refrigerant is compressed into a high-temperature and high-pressure refrigerant by the compressor 120, the high-temperature and high-pressure refrigerant flows through the cabin condenser 210, and releases heat in the cabin condenser 210 to heat the air in the cabin condenser 210, thereby heating the air in the cabin and turning into a medium-temperature and high-pressure mixed refrigerant. Subsequently, the medium-temperature and high-pressure mixed refrigerant is turned into a low-temperature and low-pressure liquid refrigerant under the throttling effect of the third throttle valve 141 or the fourth throttle valve 220. The low-temperature and low-pressure liquid refrigerant evaporates and absorbs heat through the water-cooled heat exchanger 192 and the second outdoor heat exchanger 142, and turns into a low-temperature and low-pressure gaseous refrigerant. Subsequently, the low-temperature and low-pressure gaseous refrigerant passes through the fifth refrigerant pipeline 230 and the liquid storage tank 130, and then flows back to the compressor 120.

[0144] In the cabin heating mode, the water pump 195 in the power unit coolant circulation loop 190 does not work, so the coolant does not circulate, and the heat exchange effect in the power unit coolant circulation loop 190 is not significant, which will not be described in detail here.

[0145] 5. Waste heat recovery to achieve cabin heating mode

[0146] The cabin heating mode achieved by waste heat recovery is a mode in which the heat that can be accumulated by the power unit coolant circulation loop 190 is used, and the heat generated by the work of the compressor 120 is used to heat the cabin when the power unit coolant circulation loop 190 provides a large amount of heat that can be accumulated (that is, the temperature of the coolant is higher after passing through the controller heat exchanger 197 and the motor heat exchanger 196).

[0147] Figure 8 FIG. 1 is a schematic diagram of the cycle operation of the thermal management system in some embodiments in the cabin heating mode of waste heat recovery. Figure 8 As shown, in the cabin heating mode: (1) the first throttle valve 113 and the second throttle valve 172 are closed; (2) the second stop valve 161 in the second refrigerant pipeline 160 is closed; (3) the first stop valve 151 in the first refrigerant pipeline 150 is closed; (4) the third stop valve 181 in the third refrigerant pipeline 180 is closed; (5) at least one of the third throttle valve 141 or the fourth throttle valve 220 turns on the throttling function and ensures the circulation of refrigerant; (6) the fourth stop valve 201 in the fourth refrigerant pipeline 200 is opened; (7) the fifth stop valve 143 is closed; (8) the sixth stop valve 231 in the fifth refrigerant pipeline 230 is closed; (9) the first port and the third port in the first three-way valve 193 are connected; (10) the water pump 195 works to drive the coolant circulation.

[0148] When the cabin heating mode is realized by waste heat recovery, the heat exchange process of the refrigerant circulation loop is as follows: After the gaseous refrigerant is compressed into high-temperature and high-pressure refrigerant by the compressor 120, the high-temperature and high-pressure refrigerant flows through the cabin condenser 210, and releases heat in the cabin condenser 210 to heat the air in the cabin condenser 210, thereby heating the air in the cabin and turning it into a medium-temperature and high-pressure mixed refrigerant. Subsequently, the medium-temperature and high-pressure mixed refrigerant is turned into a low-temperature and low-pressure liquid refrigerant under the throttling effect of the third throttle valve 141 or the fourth throttle valve 220. The low-temperature and low-pressure liquid refrigerant evaporates and absorbs heat when passing through the water-cooled heat exchanger 192, and turns into a low-temperature and low-pressure gaseous refrigerant. Subsequently, the low-temperature and low-pressure gaseous refrigerant passes through the fourth refrigerant pipeline 200 and the liquid storage tank 130, and then flows back to the compressor 120.

[0149] In the cabin heating mode using waste heat recovery, the heat exchange process of the power unit coolant circulation loop 190 is as follows: driven by the water pump 195, the coolant flows through the controller heat exchanger 197 and the motor heat exchanger 196 to absorb heat, and flows through the electric heater 194, and then the coolant flows through the water-cooled heat exchanger 192 to release heat. After flowing through the water-cooled heat exchanger 192, the coolant flows through the first port and the third port of the first three-way valve 193 in sequence, and flows back to the water pump 195 to continue circulating.

[0150] 6. Battery pack and cabin heating mode

[0151] The simultaneous heating mode for the battery pack and the cabin is a mode in which the battery pack and the cabin are heated simultaneously under extremely low temperature conditions (for example, -10°C). Under extremely low temperature conditions, the heat generated by the operation of the power unit and the heat generated by the work of the compressor 120 are unlikely to meet the requirements for simultaneous heating of the battery pack and the cabin. At this time, the electric heater 194 is required to heat the coolant to provide more heat for the overall system. Of course, in some accidental cases, it is also possible that the coolant temperature in the power unit coolant circulation loop 190 is very high, in which case the electric heater 194 may not need to be turned on.

[0152] Fig. 9 FIG. 1 is a schematic diagram of the cycle operation of the thermal management system in some embodiments in the mode of heating the battery pack and the cabin simultaneously. Fig. 9As shown, in the cabin heating mode: (1) the first throttle valve 113 is fully open; (2) the second throttle valve 172 is closed; (3) the second stop valve 161 in the second refrigerant pipeline 160 is closed; (4) the first stop valve 151 in the first refrigerant pipeline 150 is opened; (5) the third stop valve 181 in the third refrigerant pipeline 180 is opened; (6) the third throttle valve 141 is throttled, and the fourth throttle valve 220 controls the refrigerant flow through the cabin condenser 210 according to the situation; (7) the fourth stop valve 201 in the fourth refrigerant pipeline 200 is opened; (8) the fifth stop valve 143 is closed; (9) the sixth stop valve 231 in the fifth refrigerant pipeline 230 is closed; (10) the first port and the third port in the first three-way valve 193 are connected; (11) the water pump 195 works to drive the coolant circulation.

[0153] In the mode of heating the battery pack and the cabin at the same time, the heat exchange process of the refrigerant circulation loop is as follows: the gaseous refrigerant is compressed by the compressor 120 into a high-temperature and high-pressure refrigerant. The high-temperature and high-pressure refrigerant is divided into two paths. One path passes through the first refrigerant pipeline 150 and passes through the battery pack thermal management branch to release heat and passes through the third refrigerant pipeline 180 to reach the third throttle valve 141 to achieve heating of the battery pack. The other path passes through the cabin condenser 210 and releases heat in the cabin condenser 210 to heat the air in the cabin condenser 210, thereby achieving heating of the air in the cabin and passing through the fourth throttle valve 220 to reach the third throttle valve 141. Subsequently, under the throttling action of the third throttle valve 141, the refrigerant becomes a low-temperature and low-pressure liquid refrigerant. The low-temperature and low-pressure liquid refrigerant evaporates and absorbs heat when passing through the water-cooled heat exchanger 192, and becomes a low-temperature and low-pressure gaseous refrigerant. Then, the low-temperature and low-pressure gaseous refrigerant flows back to the compressor 120 after passing through the fourth refrigerant pipeline 200 and the liquid storage tank 130 .

[0154] In the mode of heating the battery pack and the cabin at the same time, the heat exchange process of the power unit coolant circulation loop 190 is as follows: driven by the water pump 195, the coolant flows through the controller heat exchanger 197 and the motor heat exchanger 196 to absorb heat, and then passes through the electric heater 194 to absorb heat (as analyzed above, in some cases, when the coolant flows through the electric heater 194, the electric heater does not work, and the coolant may not absorb heat at this time), and then the coolant flows through the water-cooled heat exchanger 192 to release heat. After flowing through the water-cooled heat exchanger 192, the coolant flows through the first port and the third port of the first three-way valve 193 in sequence, and flows back to the water pump 195 to continue circulating.

[0155] 7. Waste heat recovery to achieve battery pack heating mode

[0156] The waste heat recovery battery pack heating mode is a mode in which the heat that can be enriched by the power unit coolant circulation loop 190 is used, and the heat generated by the compressor 120 is used to heat the battery pack when the power unit coolant circulation loop 190 provides a large amount of heat that can be enriched (that is, the temperature of the coolant is higher after passing through the controller heat exchanger 197 and the motor heat exchanger 196).

[0157] The circulation process of the refrigerant in the battery pack heating mode by waste heat recovery is the same as the refrigerant circulation process in the battery pack and cabin heating mode, except that the heat released by the high-temperature and high-pressure refrigerant is different when flowing through the cabin condenser 210. The circulation process of the coolant in the battery pack heating mode by waste heat recovery is the same as that in the cabin heating mode by waste heat recovery, and will not be repeated here. For details, please refer to the analysis of the cabin heating mode by waste heat recovery and the battery pack and cabin heating mode in the previous article.

[0158] 8. The first single steam dehumidification mode

[0159] The first single steam dehumidification mode is a mode that uses a refrigerant circulation loop to achieve cabin air dehumidification and heating when the ambient temperature is low or the vehicle is driving.

[0160] Fig.10 FIG. 1 is a schematic diagram of the cycle operation of the thermal management system in the first single evaporation dehumidification mode in some embodiments. Figure 1 -As shown, in the first single evaporation dehumidification mode: (1) the first throttle valve 113 is closed; (2) the second throttle valve 172 is throttled according to the cooling demand of the cabin evaporator 171; (3) the second stop valve 161 in the second refrigerant pipeline 160 is closed; (4) the first stop valve 151 in the first refrigerant pipeline 150 is closed; (5) the third stop valve 181 in the third refrigerant pipeline 180 is closed; (6) the third throttle valve 141 and the fourth throttle valve 220 are fully open; (7) the fourth stop valve 201 in the fourth refrigerant pipeline 200 is closed; (8) the fifth stop valve 143 is opened; (9) the sixth stop valve 231 in the fifth refrigerant pipeline 230 is closed; (10) the water pump 195 does not work.

[0161] In the first single evaporation dehumidification mode, the heat exchange process of the refrigerant circulation loop is as follows: the gaseous refrigerant is compressed by the compressor 120 into a high-temperature and high-pressure refrigerant. The high-temperature and high-pressure refrigerant passes through the cabin condenser 210, and releases heat in the cabin condenser 210 to heat the air in the cabin condenser 210, thereby heating the air in the cabin, and passes through the fourth throttle valve 220, the third throttle valve 141 and the water-cooled heat exchanger 192, and then passes through the second outdoor heat exchanger 142 to dissipate heat and become a low-temperature and high-pressure refrigerant. The low-temperature and high-pressure refrigerant reaches the cabin cooling branch 170 after passing through the fifth refrigerant pipeline 230 and the sixth refrigerant pipeline 240, and is throttled to a low-temperature and low-pressure liquid refrigerant under the action of the second throttle valve 172. The low-temperature and low-pressure liquid refrigerant absorbs heat and evaporates in the cabin evaporator 171, cools the air flowing through the cabin evaporator 171, and causes the water vapor in the air to condense onto the surface of the cabin evaporator 171, thereby dehumidifying the air. It should be noted that the dehumidified air flows through the cabin condenser 210 to be heated.

[0162] 9. Second single steam dehumidification mode

[0163] The second single steam dehumidification mode is a mode that uses a refrigerant circulation loop to achieve cabin air dehumidification and heating when the ambient temperature is not particularly low.

[0164] Fig.11 FIG. 1 is a schematic diagram of the cycle operation of the thermal management system in the first single evaporation dehumidification mode in some embodiments. Figure 1 -As shown, in the first single evaporation dehumidification mode: (1) the first throttle valve 113 is closed; (2) the second throttle valve 172 is throttled according to the cooling demand of the cabin evaporator 171; (3) the second stop valve 161 in the second refrigerant pipeline 160 is closed; (4) the first stop valve 151 in the first refrigerant pipeline 150 is closed; (5) the third stop valve 181 in the third refrigerant pipeline 180 is opened; (6) the third throttle valve 141 is closed; (7) the fourth throttle valve 220 is fully opened; (7) the fourth stop valve 201 in the fourth refrigerant pipeline 200 is closed; (8) the fifth stop valve 143 is closed and opened; (9) the sixth stop valve 231 in the fifth refrigerant pipeline 230 is closed; (10) the water pump 195 does not work.

[0165] In the second single evaporation dehumidification mode, the heat exchange process of the refrigerant circulation loop is as follows: the gaseous refrigerant is compressed by the compressor 120 into a high-temperature and high-pressure refrigerant. The high-temperature and high-pressure refrigerant passes through the cabin condenser 210, and releases heat in the cabin condenser 210 to heat the air in the cabin condenser 210, thereby heating the air in the cabin, and passes through the fourth throttle valve 220 to change the temperature to a medium-temperature and high-pressure refrigerant. The medium-temperature and high-pressure refrigerant reaches the cabin cooling branch 170 through the third refrigerant pipeline 180, and is throttled to a medium-temperature and low-pressure liquid refrigerant under the action of the second throttle valve 172. The medium-temperature and low-pressure liquid refrigerant absorbs heat and evaporates in the cabin evaporator 171, cooling the air flowing through the cabin evaporator 171, so that the water vapor in the air condenses to the surface of the cabin evaporator 171, thereby dehumidifying the air. It should be noted that the dehumidified air flows through the cabin condenser 210 to achieve heating.

[0166] In addition to providing the aforementioned thermal management control method, the embodiment of the present disclosure also provides a thermal management control device. Fig.12 Schematic diagram of a thermal management control device provided by an embodiment of the present disclosure. Fig.12 As shown, the thermal management control device 1200 provided in the embodiment of the present disclosure includes a judgment unit 1201 and a control unit 1202 .

[0167] The judgment unit 1201 is used to determine whether to start thermal management of the battery pack based on the detected temperature of the battery pack; the control unit 1202 is used to control the refrigerant to flow through the battery pack thermal management branch when it is determined that thermal management of the battery pack is started, so as to achieve heat exchange between the refrigerant and the battery pack.

[0168] In some embodiments, the thermal management control device 1200 further includes a thermal management type determination unit. The thermal management type determination unit determines the type of thermal management to be initiated for the battery pack according to the detected temperature, and the type includes cooling management and heating management. The control unit 1202 determines the target refrigerant to flow through the battery pack thermal management branch according to the type of thermal management, and the target refrigerant is a cooling refrigerant or a heating refrigerant.

[0169] In some embodiments, when the type of thermal management is cooling management, the control unit 1202 controls the cooling refrigerant to flow into the battery branch 110 from the second port of the first refrigerant flow channel in the intermediate heat exchanger 111, and to flow out of the battery branch 110 from the second port of the second refrigerant flow channel; and controls the first throttle valve 113 to throttle the cooling refrigerant.

[0170] In some embodiments, while controlling the cooling refrigerant to flow through the battery pack thermal management branch, the control unit 1202 controls the second stop valve 161 to open and controls the first stop valve 151 to close, so that the refrigerant flowing out of the second port of the second refrigerant flow channel can flow back to the compressor 120 via the second refrigerant pipeline 160.

[0171] In some embodiments, the judgment unit 1201 is also used to judge whether to start the cooling management of the cabin based on the detected temperature of the cabin, the air humidity and / or the set temperature of the cabin; when it is determined that the cooling management of the cabin is started, the control unit 1202 controls the cooling refrigerant to flow through the cabin cooling branch 170, and controls the second throttle valve 172 to throttle the cooling refrigerant flowing through the cabin cooling branch 170.

[0172] In some embodiments, when the type of thermal management is cooling management, the control unit 1202 is further configured to control the second stop valve 161 to throttle the refrigerant flowing through the second refrigerant pipeline 160 .

[0173] In some embodiments, when the type of thermal management is cooling management, the control unit 1202 controls the third stop valve 181, the fourth stop valve 201 to close and the sixth stop valve 231, and controls the fifth stop valve 143 to open, so that the refrigerant compressed by the compressor 120 flows through the refrigerant flow channels of the water-cooled heat exchanger 192 and the second outdoor heat exchanger 142 in sequence and dissipates heat; and controls the first port and the second port of the first three-way valve 193 to be connected, so that the condensate flows through the first outdoor heat exchanger 191 after flowing through the water-cooled heat exchanger 192.

[0174] In some embodiments, when the type of thermal management is heating management, the control unit 1202 is also used to control the heating refrigerant to flow into the battery branch 110 from the second port of the second refrigerant flow channel in the intermediate heat exchanger 111, and flow out of the battery branch 110 from the first port of the first refrigerant flow channel.

[0175] In some embodiments, when the type of thermal management is heating management, the control unit 1202 is also used to control the first stop valve 151 to open and the second stop valve 161 to close, so that the heating refrigerant flowing out of the refrigerant outlet of the compressor 120 in the refrigerant circulation loop flows into the battery branch 110 from the second port of the second refrigerant flow channel, and controls the third throttle valve 141 to throttle the refrigerant entering the refrigerant external circulation branch 140.

[0176] In some embodiments, when the type of thermal management is heating management, the control unit 1202 is also used to control the third stop valve 181 to open so that the refrigerant flowing out from the second port of the second refrigerant channel flows from the third refrigerant pipeline 180 to the refrigerant external circulation branch 140.

[0177] In some embodiments, when the type of thermal management is heating management, the control unit 1202 is also used to determine the mode type of the heat enrichment mode of the heating management according to the coolant temperature and the ambient temperature, and the heat enrichment mode includes a winter heating mode and a waste heat recovery mode; when the mode type is the winter heating mode, the fourth stop valve 201 is controlled to be closed, and the fifth stop valve 143 and the sixth stop valve 231 are controlled to be opened; when the mode type is the waste heat recovery mode, the fourth stop valve 201 is controlled to be opened, and the fifth stop valve 143 and the sixth stop valve 231 are controlled to be closed; and, the first port and the third port of the first three-way valve 193 are controlled to be connected.

[0178] An embodiment of the present disclosure further provides a control device, which includes a processor and a memory, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the control method of the thermal management system of any of the above embodiments can be implemented.

[0179] Fig.13 Schematic diagram of the structure of the control device provided by the embodiment of the present disclosure. Fig.13 , which shows a schematic diagram of the structure of a control device suitable for implementing the embodiments of the present disclosure. Fig.13 The control device shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present disclosure.

[0180] like Fig.13 As shown, the control device 1300 may include a processing device (e.g., a central processing unit, a graphics processor, etc.) 1301, which can perform various appropriate actions and processes according to a program stored in a read-only memory ROM 1302 or a program loaded from a storage device 1308 to a random access memory RXM 1303. In RXM 1303, various programs and data required for the operation of the control device 1300 are also stored. The processing device 1301, ROM 1302, and RXM 1303 are connected to each other via a bus 1304. An input / output I / O interface 1305 is also connected to the bus 1304.

[0181] Typically, the following devices may be connected to the I / O interface 1305: input devices 1305 including, for example, a touch screen, a touch pad, a camera, a microphone, an accelerometer, a gyroscope, etc.; output devices 1307 including, for example, a liquid crystal display, a speaker, a vibrator, etc.; storage devices 1308 including, for example, a magnetic tape, a hard disk, etc.; and communication devices 1309. The communication devices 1309 may allow the control device 1300 to communicate with other devices wirelessly or by wire to exchange data. Although Fig.13 The control device 1300 is shown with various devices, but it should be understood that it is not required to implement or have all the devices shown. More or fewer devices may be implemented or have instead.

[0182] In particular, according to an embodiment of the present disclosure, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present disclosure includes a computer program product, which includes a computer program carried on a non-transitory computer-readable medium, and the computer program contains program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from the network through the communication device 1309, or installed from the storage device 1308, or installed from the ROM 1302. When the computer program is executed by the processing device 1301, the above-mentioned functions defined in the method of the embodiment of the present disclosure are executed.

[0183] It should be noted that the computer-readable medium disclosed above may be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present disclosure, a computer-readable storage medium may be any tangible medium containing or storing a program that may be used by or in combination with an instruction execution system, device or device. In the present disclosure, a computer-readable signal medium may include a data signal propagated in a baseband or as part of a carrier wave, in which a computer-readable program code is carried. This propagated data signal may take a variety of forms, including but not limited to an electromagnetic signal, an optical signal, or any suitable combination of the above. The computer readable signal medium may also be any computer readable medium other than a computer readable storage medium, which may send, propagate or transmit a program for use by or in conjunction with an instruction execution system, apparatus or device. The program code contained on the computer readable medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (radio frequency), etc., or any suitable combination of the above.

[0184] In some embodiments, the client and the server may communicate using any currently known or future developed network protocol such as HTTP (Hypertext Transfer Protocol), and may be interconnected with any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include a local area network ("LAN"), a wide area network ("WAN"), an internet (e.g., the Internet), and a peer-to-peer network (e.g., an ad hoc peer-to-peer network), as well as any currently known or future developed network.

[0185] The computer-readable medium may be included in the control device, or may exist independently without being assembled into the control device.

[0186] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present disclosure. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some implementations as replacements, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated system based on hardware that performs the specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0187] The functions described above herein may be performed at least in part by one or more hardware logic components. For example, without limitation, exemplary types of hardware logic components that may be used include: field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), complex programmable logic devices (CPLDs), and the like.

[0188] In the context of the present disclosure, a machine-readable medium may be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, device, or equipment. A machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or equipment, or any suitable combination of the foregoing. A more specific example of a machine-readable storage medium may include an electrical connection according to one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0189] The embodiments of the present disclosure also provide a computer-readable storage medium, in which a computer program is stored. When the computer program is executed by a processor, the method of any of the above method embodiments can be implemented. The execution method and beneficial effects are similar and will not be repeated here.

[0190] The disclosed embodiments also provide a vehicle, the vehicle including the aforementioned thermal management system, and the corresponding thermal management working modes can be realized by controlling the thermal management system according to the aforementioned control methods under various working modes.

[0191] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0192] The above are only specific embodiments of the present disclosure, so that those skilled in the art can understand or implement the present disclosure. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A thermal management system, characterized in that: The refrigerant circulation circuit in the thermal management system includes a compressor and a battery branch; The battery branch includes an intermediate heat exchanger and a battery heat exchanger; The intermediate heat exchanger includes a first refrigerant flow channel and a second refrigerant flow channel that are independent of each other; One port of the refrigerant flow channel of the battery heat exchanger is in communication with the first port of the first refrigerant flow channel, and the other port is in communication with the first port of the second refrigerant flow channel; The refrigerant outlet of the compressor is in communication with the second port of the second refrigerant flow channel.

2. The thermal management system according to claim 1, characterized in that: The battery branch circuit also includes a first refrigerant pipeline; One end of the first refrigerant pipeline is connected to the refrigerant outlet of the compressor, and the other end is connected to the second port of the second refrigerant flow channel; The first refrigerant pipeline includes a first stop valve, which is opened in the target working mode to allow the circulating refrigerant flowing out of the compressor refrigerant outlet to flow to the second refrigerant flow channel.

3. The system according to claim 1, characterized in that The battery branch also includes a first throttle valve; One port of the coolant flow channel of the battery heat exchanger is communicated with the first port of the first coolant flow channel through the first throttle valve.

4. The thermal management system according to claim 3, characterized in that: The battery branch circuit also includes a second refrigerant pipeline; One end of the second refrigerant pipeline is connected to the second port of the second refrigerant flow channel, and the other end is connected to the refrigerant inlet of the compressor in the refrigerant circulation loop; The second refrigerant pipeline includes a second stop valve, which is opened in the target working mode to allow the refrigerant flowing through the first refrigerant flow channel and the second refrigerant flow channel in sequence to flow back to the compressor.

5. The thermal management system according to claim 4, characterized in that: The refrigerant circulation loop also includes a cabin cooling branch; The cabin cooling branch includes a cabin evaporator and a second throttle valve; The inlet of the refrigerant flow passage of the cabin evaporator is connected in parallel with the second port of the first refrigerant flow passage through the second throttle valve, and the outlet of the refrigerant flow passage of the cabin evaporator is connected with the refrigerant inlet of the compressor.

6. The thermal management system according to claim 5, characterized in that: The cabin cooling branch further includes a first one-way valve; The first one-way valve is disposed at an outlet of a refrigerant flow passage of the cabin evaporator to prevent the refrigerant from flowing back into the cabin evaporator.

7. The thermal management system according to claim 1, characterized in that: The battery branch circuit also includes a third refrigerant pipeline; One end of the third refrigerant pipeline is connected to the second port of the first refrigerant flow channel, and the other end is connected to the refrigerant external circulation branch in the refrigerant circulation loop, and the refrigerant external circulation branch is a branch for realizing heat exchange between the refrigerant and other external media; The third refrigerant pipeline includes a third stop valve.

8. The thermal management system according to claim 7, characterized in that: A third throttle valve is also provided at the interface where the refrigerant external circulation branch is connected to the third refrigerant pipeline.

9. The thermal management system according to any one of claims 1 to 8, characterized in that: The thermal management system also includes a power unit coolant circulation loop; The power unit coolant circulation loop includes a first outdoor heat exchanger and a water-cooled heat exchanger connected in series; The water-cooled heat exchanger includes a refrigerant flow channel that serves as at least a portion of a refrigerant external circulation branch in a refrigerant circulation loop, wherein the battery branch is connected in series with the refrigerant external circulation branch.

10. The thermal management system according to claim 9, characterized in that: The refrigerant circulation loop also includes a cabin condenser and a fourth throttle valve; The inlet of the cabin condenser refrigerant flow channel is communicated with the refrigerant outlet of the compressor, and the outlet of the cabin condenser refrigerant flow channel is communicated with the inlet of the water-cooled heat exchanger refrigerant flow channel through the fourth throttle valve.

11. The thermal management system according to claim 9, characterized in that: The refrigerant external circulation branch also includes a fourth refrigerant pipeline; One end of the fourth refrigerant pipeline is connected to the outlet of the refrigerant flow channel of the water-cooled heat exchanger, and the other end is connected to the refrigerant inlet of the compressor in the refrigerant circulation loop; The fourth refrigerant pipeline includes a fourth stop valve.

12. The thermal management system according to claim 9, characterized in that: The refrigerant external circulation branch also includes a second outdoor heat exchanger and a fifth stop valve; The inlet of the refrigerant flow passage of the second outdoor heat exchanger is connected to the outlet of the refrigerant flow passage of the water-cooled heat exchanger through the fifth stop valve.

13. The thermal management system according to claim 12, characterized in that: The refrigerant circulation loop also includes a fifth refrigerant pipeline; One end of the fifth refrigerant pipeline is connected to the outlet of the refrigerant flow channel of the second outdoor heat exchanger, and the other end is connected to the refrigerant inlet of the compressor in the refrigerant circulation loop; The fifth refrigerant pipeline includes a sixth stop valve.

14. The thermal management system according to claim 9, characterized in that: The power unit coolant circulation loop also includes a first three-way valve; The first port of the first three-way valve is communicated with the outlet of the coolant flow channel of the water-cooled heat exchanger, the second port of the first three-way valve is communicated with the inlet of the coolant flow channel of the first outdoor heat exchanger, and the third port of the first three-way valve is communicated with the outlet of the coolant flow channel of the first outdoor heat exchanger; The first three-way valve is used to bypass the first outdoor heat exchanger in a target operating mode.

15. The thermal management system according to claim 14, characterized in that: The power unit coolant circulation loop also includes an electric heater, which is used to electrically heat the coolant in the target working mode.

16. A vehicle, characterized in that: Comprising a thermal management system as claimed in any one of claims 1 to 15.

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