Thermal management system

Abstract

The utility model discloses a thermal management system which comprises a charging pile and a first circulation system, the charging pile comprises a charging gun and a power supply module connected with the charging gun through a cable, and the first circulation system comprises a first heat exchanger and a second heat exchanger. The first heat exchanger can absorb waste heat of the charging pile, and the waste heat is used for heating a cable connected with the charging gun through the second heat exchanger. Therefore, the thermal management system not only can ensure continuous and stable heat supply and ensure that the cable is always at a proper temperature, and has good flexibility, so that a user can conveniently plug and unplug the charging gun and drag the cable connected with the charging gun at any time, thereby solving the problem of inconvenient operation caused by rigid cable of the charging gun in a low-temperature environment in winter; and moreover, the problem of daily heat loss of the charging pile is solved, that is, cyclic utilization of heat loss is realized, and the user experience is integrally improved.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy, and in particular to a thermal management system capable of heating a charging gun cable. Background Art

[0002] In the prior art, new energy vehicles are generally charged through a DC charging system, which includes a DC charging pile (i.e., a DC charger), in which the output end of the AC / DC (alternating current / direct current) module is connected to a charging gun. However, during the vehicle charging process, in order to achieve fast charging with high current and high voltage, a larger diameter wiring harness is often required. For example, during the vehicle charging process, if the charging current is as high as 250A, the charging gun uses a cross-sectional area of ​​80mm 2 The wiring harness is also protected by multiple layers of rubber.

[0003] However, the thicker the charging harness is, the stiffer it will be in the low temperature environment of winter, which will be very inconvenient for users to operate and the charging experience will be poor.

[0004] Therefore, how to avoid poor user experience caused by the stiffness of the charging gun wiring harness is a technical problem that needs to be urgently solved in this field. Utility Model Content

[0005] In view of this, the utility model provides a thermal management system that can utilize the waste heat of the charging pile to heat the charging gun cable.

[0006] In order to achieve the above-mentioned utility model purpose, the utility model provides the following technical solutions:

[0007] A thermal management system, comprising:

[0008] A charging pile, including a charging gun and a power module connected to the charging gun via a cable;

[0009] The first circulation system includes a first heat exchanger and a second heat exchanger. The first heat exchanger can absorb waste heat from the power module and use the waste heat through the second heat exchanger to heat the cable connected to the charging gun.

[0010] Optionally, in the above thermal management system, a heat pump system is further included, the heat pump system includes an evaporator and a first heat exchange pipeline in the third heat exchanger, the first heat exchange pipeline is connected in series with the evaporator;

[0011] The third heat exchanger further includes a second heat exchange pipeline, and the second heat exchange pipeline can exchange heat with the first heat exchange pipeline and adjust the temperature of the cable.

[0012] Optionally, in the above thermal management system, the first circulation system includes a first heat absorption pipeline in the first heat exchanger, and a second heat release pipeline in the second heat exchanger, and the first circulation medium in the first circulation system passes through the first heat absorption pipeline and the second heat release pipeline in sequence; the first heat absorption pipeline can absorb the waste heat of the power module and transfer it to the second heat release pipeline;

[0013] The second heat exchanger also includes a second heat absorption pipeline capable of exchanging heat with the second heat release pipeline. The second heat absorption pipeline is connected in parallel with the evaporator and can heat the heat exchange medium in the heat pump system; or, the second heat absorption pipeline is connected in series with the third heat exchange pipeline in the third heat exchanger and can replace the first heat exchange pipeline to transfer heat to the second heat exchange pipeline; or, the second heat absorption pipeline is connected in parallel with the second heat exchange pipeline and can replace the second heat exchange pipeline to transport the second medium to the second circulation system, and the second circulation system is used to adjust the temperature of the cable.

[0014] Optionally, in the above thermal management system, the parallel inlet of the second heat absorption pipeline and the evaporator is selectively opened and closed by a first control valve.

[0015] Optionally, in the above thermal management system, the first heat exchanger includes a plate heat exchanger.

[0016] Optionally, in the above thermal management system, a second medium storage tank is provided in the second circulation system, and the second heat exchange pipeline and / or the second heat absorption pipeline can adjust the temperature of the second medium in the second medium storage tank.

[0017] Optionally, in the above thermal management system, an electric heater and a first connecting pipeline are arranged in parallel between the first heat absorption pipeline and the second heat release pipeline.

[0018] Optionally, in the above thermal management system, the parallel inlet of the electric heater and the first connecting pipeline is selectively opened or closed by a second control valve.

[0019] Optionally, in the above thermal management system, a second condenser is further included, and the second condenser is close to the cable or in contact with the cable;

[0020] The second condenser and the second heat exchange pipeline are connected in series to the second circulation system.

[0021] Optionally, in the above thermal management system, a second connecting pipeline is further provided in the second circulation system, and the second connecting pipeline is connected in parallel with the second condenser.

[0022] Optionally, in the above thermal management system, the parallel inlet of the second connecting pipeline and the second condenser is selectively opened and closed by a third control valve.

[0023] Optionally, in the above thermal management system, it also includes:

[0024] A first temperature sensor, used to measure the waste heat temperature of the power module;

[0025] and / or, a second temperature sensor, used to measure the temperature of the medium in the first circulation system;

[0026] and / or, a third temperature sensor, for measuring the temperature of a medium in a connecting pipeline between an outlet of the second heat exchange pipeline and an inlet of the second condenser;

[0027] And / or, a fourth temperature sensor, used to measure the temperature of the medium in the connecting pipeline between the outlet of the second condenser and the inlet of the second heat exchange pipeline.

[0028] Optionally, in the above thermal management system, the second medium in the second circulation system includes a liquid medium.

[0029] Optionally, in the above thermal management system, the first medium in the first circulation system includes a liquid medium.

[0030] Compared with the prior art, the thermal management system provided by the present invention can utilize the waste heat of the charging pile power module to heat the charging gun cable through the first circulation system. When the waste heat of the charging pile power module is used to heat the cable, it can not only ensure a continuous and stable heat supply, but also ensure that the cable is always at a suitable temperature and has good flexibility, so that users can easily plug and unplug the charging gun and drag the connected cable at any time, thereby solving the problem of inconvenience caused by the stiffness of the charging gun cable in the low temperature environment in winter; it is also conducive to solving the daily heat loss problem of the charging pile, that is, it realizes the recycling of heat loss and improves the user experience as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 A schematic diagram of a thermal management system connection structure provided for the first specific embodiment of the utility model.

[0033] Figure 2A schematic diagram of the connection structure of a second circulation system provided for the first specific embodiment of the utility model.

[0034] Figure 3 A schematic diagram of the connection structure between a heat pump system and a second heat exchanger provided in the first specific embodiment of the utility model.

[0035] Figure 4 A schematic diagram of the connection structure of a second circulation system provided for the first specific embodiment of the utility model.

[0036] Figure 5 A schematic diagram of heat flow provided for the first specific embodiment of the utility model.

[0037] Figure 6 A schematic diagram of a thermal management system connection structure provided for the second specific embodiment of the utility model.

[0038] Figure 7 A schematic diagram of a thermal management system connection structure provided for the third specific embodiment of the utility model.

[0039] in:

[0040] 1- compressor, 2- third pressure sensor, 3- third heat exchanger, 4- first expansion valve,

[0041] 5-second heat exchanger, 6-evaporator, 7-second check valve, 8-second expansion valve,

[0042] 9-gas-liquid separator, 10-heat exchange medium storage tank, 11-second pump body,

[0043] 12-second pressure sensor, 13-cable, 14-second condenser, 15-first check valve,

[0044] 16- fourth temperature sensor, 17- second medium storage tank, 18- third temperature sensor,

[0045] 19-third control valve, 20-charging pile, 21-first temperature sensor,

[0046] 22-first heat exchanger, 23-second temperature sensor, 24-electric heater,

[0047] 25-first pump body, 26-first pressure sensor, 27-second control valve,

[0048] 28-first control valve, 29-third connecting pipeline,

[0049] 31-first heat exchange pipeline, 32-second heat exchange pipeline, 33-third heat exchange pipeline,

[0050] 51- second heat release pipeline, 52- second heat absorption pipeline,

[0051] 141 - second connecting pipeline, 221 - first heat absorption pipeline, 241 - first connecting pipeline. DETAILED DESCRIPTION

[0052] The utility model provides a thermal management system, which can utilize the waste heat of the charging pile power module to heat the charging gun cable.

[0053] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0054] First specific embodiment

[0055] See also Figures 1 to 4 , the first specific embodiment of the utility model provides a thermal management system, which includes a charging pile 20 and a first circulation system. Among them, the charging pile 20 includes a charging gun, and a power module connected to the charging gun through a cable; the first circulation system includes a first heat exchanger 22 and a second heat exchanger 5, and the first heat exchanger 22 can absorb the waste heat of the power module and use the waste heat through the second heat exchanger 5 to heat the cable 13 connected to the charging gun. It should be noted that the charging pile described in this article refers to the main unit part (or host cabinet) where the power module connected to the cable at the tail end of the charging gun is located. Its main function is to provide power to the charging gun. A rectifier and a radiator are often provided inside it, as well as a controller that can adjust and control the charging and heat dissipation process. Generally, the charging pile 20 runs 24 hours a day and continuously generates waste heat. Therefore, when the waste heat is used to heat the cable 13 of the charging gun, it can not only ensure a continuous and stable heat supply, but also ensure that the cable is always at a suitable temperature and has good flexibility, so that the user can easily plug and unplug the charging gun and drag the connected cable 13 at any time, thereby solving the problem of inconvenience caused by the stiffness of the charging gun cable in the low temperature environment in winter, but also help to solve the daily heat loss problem of the charging pile, that is, realize the recycling of heat loss, and improve the user experience as a whole.

[0056] See also Figure 1 and Figure 3In some embodiments, the thermal management system further includes a heat pump system, which is provided with at least an evaporator 6 and a third heat exchanger 3: the evaporator 6 is used to absorb ambient heat (i.e., heat in the air) and transmit it to the third heat exchanger 3 through a heat exchange medium; the third heat exchanger 3 can use the heat in the heat exchange medium to adjust the temperature of the cable. For example, when the ambient temperature is high (e.g., hot summer weather), the heat pump system can be used to provide the second circulation system (see Figure 2 ) to dissipate heat, thereby dissipating heat for the cable through the second circulation system to prevent the cable temperature from being too high.

[0057] For further information, see Figure 1 , Figure 3 and Figure 4 , the first circulation system includes a first heat exchanger 22 and a second heat exchanger 5. The first heat absorption pipeline 221 in the second heat exchanger 22 absorbs the waste heat of the power module and transmits it to the second heat release pipeline 51. The heat is transferred outward through the second heat release pipeline 51 in the second heat exchanger 5. For example, the second heat absorption pipeline 52 is connected in parallel with the evaporator 6 to replace the evaporator 6 to heat the heat exchange medium in the heat pump system, and then the third heat exchanger 3 is used to provide the heat required for heating the cable. At this time, the first circulating medium in the first circulation system passes through the first heat absorption pipeline 221 and the second heat release pipeline 51 in turn, and forms a cycle through the first pump body 25 to achieve continuous utilization of waste heat. Therefore, when the ambient temperature is too low and it is difficult for the evaporator 6 to absorb heat in the environment, the waste heat generated by the charging pile power module can be utilized through the first circulation system, and the heat required for heating the charging gun cable can be provided through the second heat absorption pipeline 52 connected in parallel with the evaporator 6.

[0058] In specific implementation, a first control valve 28 can be provided at the parallel inlet of the second heat absorption pipeline 52 and the evaporator 6, so that the opening and closing of the second heat absorption pipeline 52 and the evaporator 6 can be selectively controlled by the first control valve 28 according to actual conditions. Specifically, when the ambient temperature is high, the first control valve 28 controls the pipeline where the evaporator 6 is located to open and the second heat absorption pipeline 52 to close. At this time, the heat pump system can meet the heat dissipation requirements of the charging gun and its connecting cables; when the ambient temperature is too low and the evaporator 6 is difficult to absorb heat in the environment, the first control valve 28 controls the second heat absorption pipeline 52 to open and the pipeline where the evaporator 6 is located to close. At this time, the first circulation system can realize the utilization of the waste heat of the charging pile power module, and the second heat exchanger 5 provides the heat required for heating the charging gun cable.

[0059] In some embodiments, the first heat exchanger 22 and the second heat exchanger 5 are plate heat exchangers, respectively. However, this is not limited to this. In other embodiments, other heat exchange devices that can absorb the waste heat of the charging pile and transfer it to the first medium of the first circulation system can also be used, and the utility model does not make specific limitations on this.

[0060] For further information, see Figure 1 and Figure 4 In the above thermal management system, an electric heater 24 and a first connecting pipeline 241 are arranged in parallel between the first heat absorption pipeline 221 and the second heat release pipeline 51. Preferably, the second control valve 27 is used to select opening and closing at the parallel entrance of the electric heater 24 and the first connecting pipeline 241. Therefore, when the waste heat generated by the power module in the charging pile 20 is not enough to meet the heating demand of the cable, the electric heater 24 can also provide heat energy. Specifically, when the second control valve 27 controls the pipeline where the electric heater 24 is located to be closed and the first connecting pipeline 241 is opened, the waste heat generated by the power module in the charging pile 20 is mainly used to provide the heat required for heating the cable; when the second control valve 27 controls the first connecting pipeline 241 to be closed and the pipeline where the electric heater 24 is located to be opened, the first medium of the first circulation system is mainly heated by the electric heater 24, and then transferred to the outside through the second heat exchanger 5, and finally the purpose of heating the cable is achieved.

[0061] In specific implementation, the electric heater 24 can adopt a PTC (Positive Temperature Coefficient) heater, or any other additional device that can achieve the purpose of increasing the temperature of the medium. Among them, the PTC heater is a high-voltage type, which can generally reach more than 5kw, and the working voltage is more than 300V, and its efficiency is relatively high. In specific implementation, the second control valve 27 can be set at the parallel entrance of the electric heater 24 and the first connecting pipeline 241, or control valves can be respectively set in the branches where the electric heater 24 and the first connecting pipeline 241 are located to control the opening and closing of the branches. The specific control method can be to control the opening and closing through manual operation, or to connect to the thermal management controller to realize automatic control, and the utility model does not make specific limitations on this.

[0062] In some embodiments, a first temperature sensor 21 is provided inside the charging pile 20 or on the connecting pipeline between the charging pile 20 and the first heat exchanger 22 for measuring the waste heat temperature of the charging pile 20 so as to manually or automatically determine by a thermal management controller whether to utilize the waste heat of the charging pile power module.

[0063] In some embodiments, a second temperature sensor 23 is provided in the first circulation system for measuring the actual temperature of the first medium in the first circulation system. Specifically, the second temperature sensor 23 can be installed on the outlet connecting pipeline of the first heat absorption pipeline 221 in the first heat exchanger 22 (e.g., Figure 1 As shown in the figure), the temperature of the medium in the second circulation system after being heated by the first heat exchanger 22 (i.e., heated by the waste heat of the charging pile power module) can be measured by the second temperature sensor 23, and then the temperature is judged manually or automatically by the controller whether it is appropriate, that is, whether the temperature can meet the heating demand of the cable at that time. Alternatively, in other embodiments, the second temperature sensor 23 can also be installed in the inlet connecting pipeline of the first heat absorption pipeline 221 of the first heat exchanger 22 (not shown in the figure), such as near the inlet / outlet of the first water pump 25. At this time, the temperature of the second medium in the second circulation system after heat exchange with the second heat absorption pipeline 52 in the second heat exchanger 5 and before entering the first heat exchanger 22 for heating can be measured by the second temperature sensor 23, and the temperature is judged manually or automatically by the controller whether it is appropriate, that is, whether the heat provided by the first circulation system can meet the heating demand of the cable at that time.

[0064] For further information, see Figure 1 and Figure 2 In the above thermal management system, a second circulation system is also included, in which a second condenser 14 and a second connecting pipeline 141 connected in parallel with the second condenser 14 are included. Moreover, a third control valve 19 is provided at the parallel inlet of the second connecting pipeline 141 and the second condenser 14 to control whether the second connecting pipeline 141 is connected and whether the working pipeline in the second condenser 14 is working. Among them, the second condenser 14 is close to or in contact with the cable, so that the temperature of the cable can be directly adjusted (mainly used for heat dissipation and cooling of the cable).

[0065] In addition, the third heat exchanger 3 includes a first heat exchange pipeline 31 located in the heat pump system, and a second heat exchange pipeline 32 located in the second circulation system, and the second heat exchange pipeline 32 can exchange heat with the first heat exchange pipeline 31, and transport the second medium after heat exchange to the second condenser 14. During the operation of the second circulation system, when the second medium passes through the second heat exchange pipeline 32, the temperature increases / decreases due to heat exchange with the first heat exchange pipeline 31, and then when passing through the second condenser 14, the temperature of the cable can be adjusted.

[0066] In some embodiments, the second circulation system is provided with a second medium storage tank 17 capable of storing the second medium. At this time, the second heat exchange pipeline 32 can heat the second medium in the second medium storage tank 17. Alternatively, in other embodiments, the second heat absorption pipeline 52 can also be used to heat the second medium in the second medium storage tank 17.

[0067] Generally, the second condenser 14 is located near the cable or in direct contact with the cable, and can adjust the temperature of the cable by lowering / raising the temperature of the environment in which the cable is located (i.e., the surface temperature of the cable), that is, the temperature of the cable can be adjusted by the second condenser 14. The adjustment method includes: when the ambient temperature is high, in order to avoid overheating of the cable, the second condenser 14 and the second circulation system and heat pump system in which it is located can help the cable dissipate heat; when the ambient temperature is low, in order to avoid the cable becoming stiff and inconvenient to operate due to the low temperature, the second condenser 14 is controlled to be closed and the second connecting pipeline 141 is opened, and the cable is heated by at least one of the heat pump system, the waste heat of the charging pile power module, and the electric heater 24, so that it becomes softer and easier to operate.

[0068] In some embodiments, the thermal management system is also provided with a plurality of temperature sensors, so as to facilitate automatic control of the thermal management system through the thermal management controller and its corresponding server. For example, in the second circulation system, a third temperature sensor 18 is provided on the connecting pipe between the outlet of the second heat exchange pipe 32 and the inlet of the second condenser 14, and the actual temperature of the second medium in the connecting pipe at this position can be measured by the third temperature sensor 18; for example, in the second circulation system, a fourth temperature sensor 16 is provided on the connecting pipe between the outlet of the second condenser 14 and the inlet of the second heat exchange pipe 32, and the actual temperature of the second medium in the connecting pipe at this position can be measured by the fourth temperature sensor 16. Thus, by measuring the above temperature, it is convenient for manual or controller to automatically determine whether the temperature is within a reasonable range, that is, to determine whether the temperature adjustment degree provided by the current thermal management system can meet the actual needs of the cable at that time, and then make further adjustments.

[0069] In specific implementation, the first medium in the first circulation system and the second medium in the second circulation system can both be liquid media, such as coolant. For example, water, or liquid media doped with other functional components (such as antifreeze, etc.). In addition, see Figure 1: In the first circulation system, the first medium is driven to circulate through the first pump body 25, and the medium pressure in the outlet pipeline of the first pump body can be measured through the first pressure sensor 26; the second circulation system is also provided with a second pump body 11, a second pressure sensor 12, a first one-way valve 15, and a second medium storage tank 17, so that the second medium can be driven to unidirectionally circulate through the second pump body 11 and the one-way valve 15, and sufficient second medium is provided through the second medium storage tank 17, and the medium pressure in the outlet pipeline of the second pump body is measured by the second pressure sensor 12; the heat pump system is also provided with a compressor 1, a third pressure sensor 2, a third heat exchanger 3, a first expansion valve 4, an evaporator 6, a second one-way valve 7, a gas-liquid separator 9, and a heat exchange medium storage tank 10 in series, and a second expansion valve 8 is provided in parallel on the connecting pipeline between the second one-way valve 7 and the gas-liquid separator 9, so as to ensure the normal operation of the heat pump system.

[0070] It should be noted that, in specific implementation, the temperature can be adjusted directly by the third heat exchanger 3 in the heat pump system and / or the second condenser 5 in the first circulation system. Figure 1 As shown in the figure, the temperature of the cable is adjusted by the second circulation system, and the cold source of the second circulation system comes from the heat pump system, and the heat source comes from the heat pump system and / or the first circulation system.

[0071] Specifically, when the temperature of the cable is adjusted by the second circulation system, its working modes include:

[0072] a. When the ambient temperature is high, the heat pump system is used to cool the second medium in the second circulation system, so that the second circulation system can dissipate heat and cool the charging gun cable to avoid high temperature hazards.

[0073] b. When the ambient temperature is low, the evaporator 5 has a poor working efficiency and even has difficulty absorbing heat from the air. At this time, it is preferred to start the first circulation system to realize waste heat utilization, that is, the first connecting pipeline 241 is controlled to be opened through the second control valve 27, the branch where the electric heater 24 is located is closed, and the electric heater 24 is not started, so that the first heat exchanger 22 in the first circulation system can absorb the waste heat of the charging pile power module and transfer the heat to the heat pump system through the second heat exchanger 5, so that the heat pump system can heat the second medium in the second circulation system, and the second circulation system can heat the charging gun cable to avoid the problems of cable stiffness and inconvenient operation. When the heat pump system is heated by the waste heat of the charging pile power module, the flow path of the first medium in a cycle is: the heat dissipation pipeline in the charging pile 20 → the first temperature sensor 21 → the first heat exchanger 22 → the second temperature sensor 23 → the first connecting pipeline 241 → the second heat release pipeline 51 in the second heat exchanger 5 → the first pump body 25 → the first pressure sensor 26. At this time, the electric heater 24 is not started, thereby reducing the power cost of the operation of the electric heater 24. The flow path of the second medium in a cycle is: the second pump body 11-the second pressure sensor 12-the heat dissipation pipeline near the charging gun cable 13 → the second connecting pipeline 141 → the first one-way valve 15-the fourth temperature sensor 16-the second medium storage tank 17.

[0074] c. When the ambient temperature is very low, the evaporator 5 in the heat pump system is difficult to absorb heat from the air. If the waste heat of the charging pile power module is not enough to meet the current demand, the first circulation system and the electric heater 24 are started, and the second control valve 27 is used to control the first connecting pipeline 241 to be closed and the branch where the electric heater 24 is located to be opened, so that the electric heater 24 is combined with the waste heat of the charging pile power module to heat the first medium in the first circulation system, and the heat is transferred to the heat pump system through the second heat exchanger 5, so that the heat pump system heats up the second medium in the second circulation system, so that the second circulation system can heat up the charging gun cable, avoiding the problem of cable stiffness and inconvenient operation. At this time, after the compressor 1 in the heat pump system extracts the high-temperature and high-pressure heat exchange medium (i.e., coolant gas), it releases heat to the second medium storage tank 17 through the third heat exchanger 3, thereby heating the second medium, and the second pump body 11 in the second circulation system extracts the hot second medium to preheat and soften the cable 13 of the charging gun. When the two heat sources, the electric heater 24 and the waste heat of the charging pile power module, are connected in series through the second control valve 27 (e.g., a three-phase switch), and jointly supply heat to the heat pump system, the flow path of the first medium in one cycle is: the heat dissipation pipeline in the charging pile 20 → the first temperature sensor 21 → the first heat exchanger 22 → the second temperature sensor 23 → the electric heater 24 → the second heat release pipeline 51 in the second heat exchanger 5 → the first pump body 25 → the first pressure sensor 26. The flow path of the second medium in one cycle is the same as above.

[0075] When the cable is heated and softened by the thermal management system, the heat flow chart in the above process b and c can be seen in Figure 5 .

[0076] Second specific embodiment

[0077] See also Figure 6 The second specific embodiment of the utility model provides a thermal management system, which is different from the above-mentioned first specific embodiment only in that: the second heat absorption pipeline 52 is connected in parallel with the second heat exchange pipeline 32 in the third heat exchanger 3, and can replace the second heat exchange pipeline 32 to transport the second medium for the second circulation system.

[0078] Therefore, when the ambient temperature is too low and the heat pump system has difficulty in providing heat to the second heat exchange pipeline 32, the second heat exchange pipeline 32 can be closed, the second heat absorption pipeline 52 and the first circulation system can be opened. At this time, the first circulation system can absorb the waste heat of the charging pile power module through the first heat exchanger 22, and can also generate heat through the electric heater 24, so that the temperature of the first medium is increased, and the heat is transferred to the second medium in the second circulation system through the second heat exchanger 5. At this time, in the second heat exchanger 5, the temperature of the first medium in the second heat release pipeline 51 is higher, and the temperature of the second medium in the second heat absorption pipeline 52 is lower, so that the heat in the second heat release pipeline 51 can be absorbed by the second heat absorption pipeline 52, so that the cable can be heated by the waste heat of the charging pile power module or the heating method of the electric heater 24.

[0079] Third specific embodiment

[0080] See also Figure 7 The third specific embodiment of the utility model provides a thermal management system, which is different from the first specific embodiment mentioned above only in that the second heat absorption pipeline 52 is connected in series with the third heat exchange pipeline 33 in the third heat exchanger 3, and through the third connecting pipeline 29, it can replace the first heat exchange pipeline 31 to transfer heat to the second heat exchange pipeline 32 in the environment where the cable is located or the second circulation system. Figure 7 The condenser 3 is also provided with a third heat exchange pipeline 33, and when the first heat exchange pipeline 31 does not work, the third heat exchange pipeline 33 provides heat for the second heat exchange pipeline 32. At this time, the second heat absorption pipeline 52, the third connecting pipeline 29, and the third heat exchange pipeline 33 are sequentially connected in series to form a circulation path that can heat the cable.

[0081] Finally, it should be noted that, in this article, relational terms such as first and second, etc. 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 "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed.

[0082] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0083] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. 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 invention. Therefore, the present invention will not be limited to the embodiments shown 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: include: A charging pile (20), comprising a charging gun and a power module connected to the charging gun via a cable; The first circulation system comprises a first heat exchanger (22) and a second heat exchanger (5), wherein the first heat exchanger (22) can absorb waste heat from the power module and use the waste heat through the second heat exchanger (5) to heat a cable connected to the charging gun.

2. The thermal management system according to claim 1, characterized in that: It also includes a heat pump system, the heat pump system including an evaporator (6) and a first heat exchange pipeline (31) in a third heat exchanger (3), the first heat exchange pipeline (31) being connected in series with the evaporator (6); The third heat exchanger (3) further comprises a second heat exchange pipeline (32), wherein the second heat exchange pipeline (32) is capable of exchanging heat with the first heat exchange pipeline (31) and regulating the temperature of the cable.

3. The thermal management system according to claim 2, characterized in that: The first circulation system comprises a first heat absorbing pipeline (221) in the first heat exchanger (22), and a second heat releasing pipeline (51) in the second heat exchanger (5); the first heat absorbing pipeline (221) is capable of absorbing waste heat of the power module and transmitting the waste heat to the second heat releasing pipeline (51); The second heat exchanger (5) further comprises a second heat absorbing pipeline (52) capable of exchanging heat with the second heat releasing pipeline (51); the second heat absorbing pipeline (52) is connected in parallel with the evaporator (6) and is capable of heating the heat exchange medium in the heat pump system; or, the second heat absorbing pipeline (52) is connected in series with the third heat exchange pipeline (33) in the third heat exchanger (3) and is capable of replacing the first heat exchange pipeline (31) to transfer heat to the second heat exchange pipeline (32); or, the second heat absorbing pipeline (52) is connected in parallel with the second heat exchange pipeline (32) and is capable of replacing the second heat exchange pipeline (32) to transport the second medium to the second circulation system, and the second circulation system is used to adjust the temperature of the cable.

4. The thermal management system according to claim 3, characterized in that: The first heat exchanger (22) comprises a plate heat exchanger; And / or, a second medium storage tank (17) is provided in the second circulation system, and the second heat exchange pipeline (32) and / or the second heat absorption pipeline (52) can adjust the temperature of the second medium in the second medium storage tank (17).

5. The thermal management system according to claim 3, characterized in that: An electric heater (24) and a first connecting pipeline (241) are arranged in parallel between the first heat absorbing pipeline (221) and the second heat releasing pipeline (51).

6. The thermal management system according to claim 2, characterized in that: Also included is a second condenser (14), the second condenser (14) being close to the cable or in contact with the cable; The second condenser (14) and the second heat exchange pipeline (32) are connected in series to the second circulation system.

7. The thermal management system according to claim 6, characterized in that: The second circulation system is also provided with a second connecting pipeline (141), and the second connecting pipeline (141) is connected in parallel with the second condenser (14).

8. The thermal management system according to claim 6, characterized in that: Also includes: A first temperature sensor (21), used for measuring the waste heat temperature of the power module; and / or, a second temperature sensor (23), used for measuring the temperature of the medium in the first circulation system; and / or, a third temperature sensor (18) for measuring the temperature of a medium in a connecting pipeline between an outlet of the second heat exchange pipeline (32) and an inlet of the second condenser (14); And / or, a fourth temperature sensor (16) for measuring the temperature of the medium in the connecting pipeline between the outlet of the second condenser (14) and the inlet of the second heat exchange pipeline (32).

9. The thermal management system according to claim 6, characterized in that: The second medium in the second circulation system includes a liquid medium.

10. The thermal management system according to any one of claims 1 to 9, characterized in that: The first medium in the first circulation system includes a liquid medium.

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