Charging station thermal management system

Abstract

The application provides a charging station heat management system. The charging station heat management system comprises: a refrigeration circuit comprising an evaporator; a battery circulation circuit comprising a first circulation pipeline, an energy storage battery connected in series in the first circulation pipeline, and a first branch pipeline connected in parallel with the first circulation pipeline, the first circulation pipeline being in communication with the evaporator, the inlet and outlet of the first branch pipeline being located between the outlet of the evaporator and the inlet of the energy storage battery; a cold storage unit connected in series in the first branch pipeline; and a first valve structure for controlling the on-off between the first circulation pipeline and the inlet of the first branch pipeline and the inlet of the energy storage battery. The cold storage unit can store a certain amount of cold energy and share the heat dissipation demand of the energy storage battery, thereby facilitating the reduction of the occupied space and the construction cost of the charging station heat management system.

Description

Technical Field

[0001] This application relates to the field of charging station technology, and in particular to a charging station thermal management system. Background Technology

[0002] With the development of the new energy vehicle industry, the market for charging stations is expanding and construction is accelerating. Charging stations are gradually developing towards supercharging stations, meaning that the power of charging piles is constantly increasing, which leads to a greater heat load on supercharging stations.

[0003] To meet the high heat load requirements of supercharging stations, large-capacity cooling units are required, which results in large footprints and high construction costs for these units. Summary of the Invention

[0004] This application provides a charging station thermal management system, which aims to improve the problems of large space occupation and high construction cost of charging station thermal management systems.

[0005] The charging station thermal management system includes: a refrigeration circuit, including an evaporator; a battery circulation circuit, including a first circulation pipeline, an energy storage battery connected in series in the first circulation pipeline, and a first branch pipeline connected in parallel with the first circulation pipeline, wherein the first circulation pipeline is connected to the evaporator, and the liquid inlet and liquid outlet of the first branch pipeline are located between the liquid outlet of the evaporator and the liquid inlet of the energy storage battery; a cold storage unit connected in series in the first branch pipeline; and a first valve structure for controlling the on / off connection between the first circulation pipeline and the liquid inlet of the first branch pipeline and the liquid inlet of the energy storage battery.

[0006] In the charging station thermal management system of this application embodiment, a cold storage unit is connected in parallel with a first branch pipe in the first circulation pipeline. The cold storage unit can store a certain amount of cold energy to share the heat dissipation demand of the energy storage battery. In this way, the heat dissipation power of the cooling circuit does not need to be matched with the full-load thermal power of the energy storage battery, thereby helping to reduce the space occupied and construction cost of the charging station thermal management system.

[0007] In some embodiments, the first valve structure is a first three-way control valve, and the first circulation pipeline is connected to the liquid inlet of the first branch pipeline and the liquid inlet of the energy storage battery through the first three-way control valve. This helps to further save installation space and reduce construction costs.

[0008] In some embodiments, the first valve structure includes a first two-way control valve and a second two-way control valve. The first circulation pipeline is connected to the inlet of the first branch pipeline through the first two-way control valve, and the first circulation pipeline is connected to the inlet of the energy storage battery through the second two-way control valve. This improves the convenience and accuracy of valve control, as well as the ease of valve maintenance and repair.

[0009] In some embodiments, the outlet side of the cold storage unit is further connected to the first circulation pipeline via a second branch pipeline. The liquid outlet of the second branch pipeline is located between the liquid outlet of the energy storage battery and the liquid inlet of the evaporator. The charging station thermal management system also includes a second valve structure, which is used to control the connection and disconnection between the liquid outlet of the first circulation pipeline and the first branch pipeline, and the liquid outlet of the second branch pipeline. In this way, the first valve structure and the second valve structure can cooperate with each other to realize the switching of multiple operating modes of the charging station thermal management system, thereby improving the functional flexibility and versatility of the charging station thermal management system.

[0010] In some embodiments, the second valve structure is a second three-way control valve, which is connected in series in the first branch pipe and located between the cold storage unit and the liquid outlet of the first branch pipe. One end of the second branch pipe is connected to the second three-way control valve. This helps to further save installation space and reduce construction costs.

[0011] In some embodiments, the second valve structure includes a third two-way control valve and a fourth two-way control valve. The third two-way control valve is connected in series in the first branch pipe and located between the cold storage unit and the liquid outlet of the first branch pipe. The fourth two-way control valve is connected in series in the second branch pipe. This improves the convenience and accuracy of valve control, as well as the convenience of valve maintenance and repair.

[0012] In some embodiments, the charging station thermal management system has a first operating mode, a second operating mode, a third operating mode, and a fourth operating mode. In the first operating mode, the inlet and outlet of the first circulation pipeline are connected to the first branch pipeline, the inlet of the energy storage battery is connected to the first branch pipeline, and the outlet of the second branch pipeline is disconnected from the first circulation pipeline. This first operating mode can be called a simultaneous cooling and cooling release mode. The coolant in the first circulation pipeline supplies cooling to the energy storage battery by obtaining cooling energy from the evaporator, while the cold storage unit releases cooling energy to supply cooling to the energy storage battery. The cold storage unit and the evaporator can jointly dissipate heat from the energy storage battery.

[0013] In the second operating mode, the inlet of the first circulation pipe is disconnected from the inlet of the first branch pipe, the inlet of the energy storage battery is connected to the first circulation pipe, and the outlet of the second branch pipe is disconnected from the first circulation pipe. This second operating mode can be called pure cooling mode or standby mode. The coolant in the first circulation pipe supplies cooling to the energy storage battery separately by obtaining cooling energy from the evaporator, and the cold storage unit does not intervene in the first circulation pipe. In this mode, it indicates that the cooling energy stored by the cold storage unit has been exhausted.

[0014] In the third operating mode, the inlet of the first circulation pipeline is connected to the liquid inlet of the first branch pipeline and the liquid inlet of the energy storage battery, while the outlet of the first branch pipeline is disconnected from the first circulation pipeline, and the outlet of the second branch pipeline is connected to the first circulation pipeline. This third operating mode can be called a simultaneous cooling and cold storage mode. In this way, the cooling capacity of the evaporator can be rationally utilized, improving system energy efficiency and reducing system operating costs.

[0015] In the fourth operating mode, the first circulation pipeline is disconnected from the liquid inlet of the energy storage battery, the liquid inlets of the first circulation pipeline and the first branch pipeline are connected, the liquid outlet of the first branch pipeline is disconnected from the first circulation pipeline, and the liquid outlet of the second branch pipeline is connected to the first circulation pipeline. This fourth operating mode can be called the pure cold storage mode, where the evaporator's cooling capacity is only supplied to the cold storage unit, enabling the cold storage unit to quickly store cold energy. This ensures that when the energy storage battery has a high heat dissipation demand, the cold storage unit can release sufficient cooling capacity.

[0016] In some embodiments, the energy storage battery has a discharging state and a first replenishing state, wherein the power of the discharging state is greater than the power of the first replenishing state. The charging station thermal management system further includes a controller electrically connected to the energy storage battery, the first valve structure, and the second valve structure. The controller is configured to control the charging station thermal management system to switch to the first operating mode when the energy storage battery is in the discharging state. At this time, the cold storage unit releases cold energy, which, together with the refrigeration circuit, dissipates heat from the energy storage battery to meet the high-power heat dissipation requirements, thereby improving the safety and reliability of the energy storage battery.

[0017] In some embodiments, the charging station thermal management system further includes a first temperature sensor disposed between the liquid inlet of the energy storage battery and the liquid outlet of the first branch pipe. The first temperature sensor is configured to acquire the inlet temperature of the energy storage battery, and the controller is electrically connected to the first temperature sensor. The first valve structure is further configured to adjust a first opening degree between the liquid inlet of the first circulation pipe and the first branch pipe, and a second opening degree between the first circulation pipe and the liquid inlet of the energy storage battery. In the first operating mode, the controller is further configured to adjust the first opening degree and the second opening degree through the first valve structure according to the relationship between the inlet temperature of the energy storage battery and a first preset temperature.

[0018] Therefore, on the one hand, it ensures that the energy storage battery operates within a safe temperature range, thereby improving the safety and reliability of the battery and, consequently, the safety and reliability of the charging station's thermal management system. On the other hand, it also mitigates energy waste caused by over- or under-cooling, improving the energy utilization rate of the charging station's thermal management system.

[0019] In some embodiments, the first preset temperature includes a first sub-preset temperature and a second sub-preset temperature, wherein the second sub-preset temperature is greater than the first sub-preset temperature. When the inlet temperature of the energy storage battery is less than the first sub-preset temperature, the first valve structure reduces the first opening and increases the second opening. When the inlet temperature of the energy storage battery is greater than or equal to the second sub-preset temperature, the first valve structure increases the first opening and decreases the second opening. Based on the above process, it is beneficial to further improve the service life and reliability of the energy storage battery, thereby further improving the service life and reliability of the charging station thermal management system. In addition, by precisely controlling the flow direction and flow rate of the coolant according to the specific inlet temperature of the energy storage battery, it is also possible to avoid over-cooling or under-cooling, reduce unnecessary energy consumption, and thus further improve the system energy efficiency.

[0020] In some embodiments, the charging station thermal management system further includes a second temperature sensor configured to acquire the current temperature of the cold storage unit; the controller is electrically connected to the second temperature sensor, and the controller is further configured to control the charging station thermal management system to switch to the second operating mode when the energy storage battery is in the first replenishment state and the current temperature of the cold storage unit is less than or equal to a second preset temperature. That is, the cooling capacity of the cooling circuit alone can meet the heat dissipation requirements of the energy storage battery in the first replenishment state, the operating power of the cooling circuit can match the power of the first replenishment state, and the cold storage unit is in a fully charged state. This helps to reduce the operating energy consumption of the charging station thermal management system and improve operational stability.

[0021] In some embodiments, the controller is further configured to control the charging station thermal management system to switch to the third operating mode when the energy storage battery is in the first recharge state and the current temperature of the cold storage unit is greater than a second preset temperature. This enables automatic replenishment of the cold storage unit's cooling capacity, ensuring sufficient cooling capacity during use, thereby improving the stability and reliability of the charging station thermal management system.

[0022] In some embodiments, the energy storage battery has a second replenishment state, where the power of the first replenishment state is greater than the power of the second replenishment state. The controller is further configured to control the charging station thermal management system to switch to the fourth operating mode when the energy storage battery is in the second replenishment state and the current temperature of the cold storage unit is greater than a preset temperature. This further improves the cold storage efficiency of the cold storage unit, ensuring sufficient cooling capacity during use, thereby contributing to improved stability and reliability of the charging station thermal management system.

[0023] In some embodiments, the controller is further configured to control the charging station thermal management system to switch to the second operating mode when the energy storage battery is in the second replenishment state and the current temperature of the cold storage unit is less than or equal to the second preset temperature. In this mode, the cooling capacity of the cooling circuit alone is sufficient to meet the heat dissipation requirements of the energy storage battery in the second replenishment state, and the operating power of the cooling circuit can be matched with the power of the second replenishment state, while the cold storage unit is in a full-capacity storage state. This helps to reduce the operating energy consumption of the charging station thermal management system and improve its operational stability and reliability.

[0024] In some embodiments, the refrigeration circuit further includes a refrigerant pipeline, a compressor, and a condenser, with the evaporator, compressor, and condenser all connected in series in the refrigerant pipeline. The battery circulation circuit further includes a first pump connected in series in the first circulation pipeline, a third branch pipeline connected in parallel with the evaporator, and an electric heating unit disposed in the third branch pipeline. Thus, under certain operating conditions, such as when the ambient temperature is too low and the energy storage battery is not operating, resulting in a low coolant temperature, the electric heating unit can be activated to keep the coolant temperature in the first circulation pipeline within a suitable temperature range, thereby further improving the reliability and stability of the charging station's thermal management system.

[0025] In some embodiments, the charging station thermal management system further includes: a charging gun and a current converter, both electrically connected to the energy storage battery; and a cooling circuit, including a second circulation pipeline and a second pump, a heat exchanger, and an air outlet for dissipating heat from the heat exchanger, all connected in series or in parallel within the second circulation pipeline. By providing a cooling circuit, heat dissipation can be achieved for the charging gun and the current converter, thereby further improving the reliability and safety of the charging station thermal management system.

[0026] In some embodiments, the air outlet component is also used to dissipate heat from the condenser. This, on the one hand, improves the cooling efficiency and stability of the refrigeration circuit; on the other hand, it eliminates the need for additional components to dissipate heat from the condenser, making the overall system layout more compact and simple, thereby reducing costs and saving space. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 A schematic diagram of a charging station thermal management system provided in an embodiment of this application;

[0029] Figure 2 Another structural schematic diagram of the charging station thermal management system provided in one embodiment of this application;

[0030] Figure 3 for Figure 2 The diagram shows the flow pattern of the first working mode of the charging station thermal management system.

[0031] Figure 4 for Figure 2 The diagram shows the flow pattern of the second working mode of the charging station thermal management system.

[0032] Figure 5 for Figure 2 The diagram shows the flow of the third working mode of the charging station thermal management system.

[0033] Figure 6 for Figure 2 The diagram shows the flow of the fourth working mode of the charging station thermal management system.

[0034] Figure 7This is a schematic diagram of the electrical connection between the controller, energy storage battery, valve structure, and first temperature sensor provided in an embodiment of this application.

[0035] Figure 8 This is a schematic diagram of the control flow of a controller provided in an embodiment of this application;

[0036] Figure 9 A schematic diagram of another control flow of the controller provided in one embodiment of this application;

[0037] Figure 10 This is a schematic diagram of the electrical connection between the controller, energy storage battery, valve structure, and second temperature sensor provided in an embodiment of this application.

[0038] Figure 11 A schematic diagram of another control flow of the controller provided in one embodiment of this application;

[0039] Figure 12 This is a schematic diagram of another structure of the charging station thermal management system provided in an embodiment of this application.

[0040] Explanation of reference numerals in the attached figures:

[0041] 10-Charging station thermal management system;

[0042] 100 - Refrigeration circuit, 110 - Evaporator, 120 - Refrigerant piping, 130 - Compressor, 140 - Condenser;

[0043] 200-Battery circulation loop, 210-First circulation pipeline, 220-Energy storage battery, 230-First branch pipeline, 240-Second branch pipeline, 250-First pump, 260-Third branch pipeline, 270-Electric heating unit;

[0044] 300 - Cold storage unit; 400 - First valve structure; 410 - First three-way control valve;

[0045] 500 - Second valve structure; 510 - Second three-way control valve;

[0046] 600-Controller, 700-First temperature sensor, 800-Second temperature sensor, 910-Charging gun, 920-Current converter, 921-DC to AC converter, 922-AC to DC converter;

[0047] 1000 - Cooling circuit, 1100 - Second circulation pipeline, 1200 - Second pump, 1300 - Heat exchanger, 1400 - Air outlet. Detailed Implementation

[0048] The principles and features of this application are described below with reference to the accompanying drawings. The examples given are only for explaining this application and are not intended to limit the scope of this application.

[0049] like Figure 1 As shown in the figure, this application proposes a charging station thermal management system 10. The charging station thermal management system 10 includes a cooling circuit 100, a battery circulation circuit 200, a cold storage unit 300, and a first valve structure 400. The cooling circuit 100 includes an evaporator 110. The battery circulation circuit 200 includes a first circulation pipe 210, an energy storage battery 220 connected in series in the first circulation pipe 210, and a first branch pipe 230 connected in parallel with the first circulation pipe 210. The first circulation pipe 210 is connected to the evaporator 110. The liquid outlet and liquid inlet of the first branch pipe 230 are located between the liquid inlet of the energy storage battery 220 and the liquid outlet of the evaporator 110. The cold storage unit 300 is connected in series in the first branch pipe 230. The first valve structure 400 is used to control the connection and disconnection between the first circulation pipe 210 and the liquid inlet of the first branch pipe 230 and the liquid inlet of the energy storage battery 220.

[0050] In this application, the refrigeration circuit 100 is used to generate cooling capacity. The refrigeration circuit 100 includes an evaporator 110 in which liquid refrigerant evaporates and absorbs heat from the battery circulation circuit 200, thereby providing a cooling effect for the battery circulation circuit 200.

[0051] The battery circulation loop 200 includes a first circulation pipe 210, which is the main channel for the circulation of media such as coolant. After the coolant is cooled by heat exchange in the evaporator 110, it flows to the energy storage battery 220 and the cold storage unit 300.

[0052] The energy storage battery 220 can charge electric vehicles and also replenish energy from the grid when its power is insufficient. With the development of supercharging technology, the charging power of the energy storage battery 220 to electric vehicles is increasing. Therefore, the discharge power of the energy storage battery 220 will be much greater than the replenishment power. Similarly, the heat generated when the energy storage battery 220 discharges will also be much greater than the heat generated when replenishing energy.

[0053] The first branch pipe 230 is connected in parallel with the first circulation pipe 210. This forms a three-way connection between the inlet of the first circulation pipe 210 and the first branch pipe 230, and the inlet of the energy storage battery 220. The cooling medium in the first circulation pipe 210 can flow simultaneously to the first branch pipe 230 and the energy storage battery 220; alternatively, it can flow solely to the energy storage battery 220; or it can flow first to the first branch pipe 230 and then to the energy storage battery 220.

[0054] The cold storage unit 300 can store cold energy and release it when needed. The cold storage unit 300 can be a container containing a cold storage medium, such as a cold water tank, which can be cooling water, phase change material, etc. When the temperature of the cold water tank is lower than a certain temperature, it indicates that the cold energy stored in the cold water tank has been exhausted.

[0055] The first valve structure 400 is used to control the connection and disconnection between the first circulation pipeline 210 and the first branch pipeline 230, and to control the connection and disconnection between the first circulation pipeline 210 and the liquid inlet of the energy storage battery 220.

[0056] Under the action of the first valve structure 400, the cold storage unit 300 can work in conjunction with the battery circulation loop 200. The inlet and outlet of the first branch pipe 230 are located between the inlet of the energy storage battery 220 and the outlet of the evaporator 110. Before the coolant in the first circulation pipe 210 flows through the energy storage battery 220, the state of the first valve structure 400 can be controlled according to actual needs, thereby determining whether the coolant enters the cold storage unit 300 of the first branch pipe 230.

[0057] For example, when the heat dissipation demand is low, the first valve structure 400 can disconnect the inlet of the first branch pipe 230 from the first circulation pipe 210. In this case, the coolant in the first circulation pipe 210 only dissipates heat from the energy storage battery 220. When the heat dissipation demand is high, the first valve structure 400 can connect the inlet of the first branch pipe 230, the inlet of the energy storage battery 220, and the first circulation pipe 210. In this case, one stream of coolant in the first circulation pipe 210 flows directly to the energy storage battery 220, while the other stream flows through the cold storage unit 300 of the first branch pipe 230 and then merges back into the first circulation pipe 210 before entering the energy storage battery 220. The cold storage unit 300 and the cooling circuit 100 work together to dissipate heat from the energy storage battery 220.

[0058] The charging station thermal management system 10 of this application embodiment includes a cold storage unit 300 connected in parallel through a first branch pipe 230 in the first circulation pipe 210. The cold storage unit 300 can store a certain amount of cold energy, thereby sharing the heat dissipation demand of the energy storage battery 220. In this way, the heat dissipation power of the cooling circuit 100 does not need to be matched to the full-load thermal power of the energy storage battery 220. For example, the size, volume, and power of components such as the compressor and heat exchanger in the cooling circuit 100 can be appropriately reduced, thereby helping to reduce the space occupied and construction cost of the charging station thermal management system 10.

[0059] In some embodiments, such as Figure 2As shown, the outlet side of the cold storage unit 300 is also connected to the first circulation pipe 210 through the second branch pipe 240. The liquid outlet of the second branch pipe 240 is located between the liquid outlet of the energy storage battery 220 and the liquid inlet of the evaporator 110. The charging station thermal management system 10 also includes a second valve structure 500, which is used to control the connection and disconnection between the liquid outlet of the first circulation pipe 210 and the liquid outlet of the first branch pipe 230 and the liquid outlet of the second branch pipe 240.

[0060] In this embodiment, the charging station thermal management system 10 also includes a second valve structure 500. The second valve structure 500 can control the connection and disconnection between the outlets of the first circulation pipe 210 and the first branch pipe 230, and between the outlets of the first circulation pipe 210 and the second branch pipe 240. That is, the second branch pipe 240 establishes another heat transfer channel between the cold storage unit 300 and the first circulation pipe 210, forming another three-way structure between the cold storage unit 300, the outlet of the second branch pipe 240, and the outlet of the first branch pipe 230. Thus, the first valve structure 400 and the second valve structure 500 can cooperate with each other to realize multiple operating modes of the charging station thermal management system 10, thereby improving the functional flexibility and versatility of the charging station thermal management system 10.

[0061] Specifically, the charging station thermal management system 10 has a first working mode, a second working mode, a third working mode and a fourth working mode.

[0062] like Figure 3 As shown, in the first operating mode, the inlet and outlet of the first circulation pipe 210 and the first branch pipe 230 are both connected, the inlet of the energy storage battery 220 is connected to the first branch pipe 230, and the outlet of the second branch pipe 240 is disconnected from the first circulation pipe 210. This first operating mode can be called the simultaneous cooling and cooling mode. The coolant in the first circulation pipe 210 supplies cooling to the energy storage battery 220 by obtaining cooling energy from the evaporator 110, while the cold storage unit 300 releases cooling energy to supply cooling to the energy storage battery 220. The cold storage unit 300 and the evaporator 110 can work together to dissipate heat from the energy storage battery 220.

[0063] like Figure 4 As shown, in the second operating mode, the inlet of the first circulation pipe 210 is disconnected from the inlet of the first branch pipe 230, the inlet of the energy storage battery 220 is connected to the first circulation pipe 210, and the outlet of the second branch pipe 240 is disconnected from the first circulation pipe 210. This second operating mode can be called a pure cooling mode, where the coolant in the first circulation pipe 210 supplies cooling to the energy storage battery 220 solely through the cooling energy obtained from the evaporator 110, and the cold storage unit 300 does not participate in the first circulation pipe 210. In this mode, it indicates that the cooling energy stored by the cold storage unit 300 has been fully stored.

[0064] like Figure 5 As shown, in the third operating mode, the inlet of the first circulation pipe 210 is connected to the inlet of the first branch pipe 230 and the inlet of the energy storage battery 220, while the outlet of the first branch pipe 230 is disconnected from the first circulation pipe 210, and the outlet of the second branch pipe 240 is connected to the first circulation pipe 210. This third operating mode can be called a simultaneous cooling and cold storage mode. On the one hand, the coolant in the first circulation pipe 210 supplies cooling to the energy storage battery 220 through the cooling energy obtained from the evaporator 110. On the other hand, the coolant in the first circulation pipe 210 flows back to the first circulation pipe 210 sequentially through the inlet of the first branch pipe 230, the cold storage unit 300, and the outlet of the second branch pipe 240, thereby supplying the cooling energy of the evaporator 110 to the cold storage unit 300, allowing the cold storage unit 300 to store cold energy. In this way, the cooling energy of the evaporator 110 can be rationally utilized, improving system energy efficiency and reducing system operating costs.

[0065] Understandably, in this mode, the heat generation power of the energy storage battery 220 is less than the cooling power of the cooling circuit 100, and the cold storage unit 300 is not fully charged. The cooling circuit 100 uses the excess cold energy to store cold in the cold storage unit 300.

[0066] like Figure 6 As shown, in the fourth working mode, the first circulation pipe 210 is disconnected from the liquid inlet of the energy storage battery 220, the liquid inlets of the first circulation pipe 210 and the first branch pipe 230 are connected, the liquid outlet of the first branch pipe 230 is disconnected from the first circulation pipe 210, and the liquid outlet of the second branch pipe 240 is connected to the first circulation pipe 210.

[0067] The fourth working mode can be called the pure cold storage mode. The energy storage battery 220 is not connected to the first circulation pipe 210. The coolant in the first circulation pipe 210 flows back to the first circulation pipe 210 through the inlet of the first branch pipe 230, the cold storage unit 300 and the outlet of the second branch pipe 240 in sequence. The cooling capacity of the evaporator 110 is only supplied to the cold storage unit 300, so that the cold storage unit 300 can quickly achieve cold storage, thereby ensuring that when the energy storage battery 220 has a large heat dissipation demand, the cold storage unit 300 can release a sufficient amount of cooling capacity.

[0068] In summary, by rationally controlling the connection state of the first valve structure 400 and the second valve structure 500, the charging station thermal management system 10 can switch between multiple operating modes. This allows for the allocation of cooling capacity in the cooling circuit 100 according to actual conditions, ensuring the heat dissipation needs of the energy storage battery 220 under high power conditions while reducing the waste of cooling capacity in the cooling circuit 100 when the energy storage battery 220 is under low power conditions. On the one hand, this improves the operational flexibility of the charging station thermal management system 10. On the other hand, the cooling circuit 100 can fully utilize low-priced energy for cooling during off-peak electricity periods or for cooling the energy storage battery 220 when it is in standby mode, thus storing cold energy in the cold storage unit 300. During peak periods, the cold storage unit 300 can release its cooling capacity to assist in heat dissipation for the energy storage battery 220, thereby improving system energy efficiency and reducing system operating and construction costs. Furthermore, the charging station thermal management system 10 has multiple operating modes, allowing the selection of the appropriate mode based on the actual state of the energy storage battery 220 and the cold storage unit 300, which also expands the application scenarios of the charging station thermal management system 10.

[0069] In some embodiments, such as Figures 2 to 6 As shown, the first valve structure 400 is a first three-way control valve 410, and the first circulation pipeline 210 is connected to the liquid inlet of the first branch pipeline 230 and the liquid inlet of the energy storage battery 220 through the first three-way control valve 410.

[0070] In this embodiment, by setting a first three-way control valve 410, the connection and disconnection between the liquid inlet of the first circulation pipe 210 and the liquid inlet of the first branch pipe 230 and the liquid inlet of the energy storage battery 220 can be realized simultaneously, which helps to further save installation space and reduce construction costs.

[0071] In other embodiments, the first valve structure 400 includes a first two-way control valve and a second two-way control valve. The first circulation pipeline 210 is connected to the inlet of the first branch pipeline 230 through the first two-way control valve, and the first circulation pipeline 210 is connected to the inlet of the energy storage battery 220 through the second two-way control valve.

[0072] In this embodiment, the first two-way control valve and the second two-way control valve respectively realize the connection and disconnection between the inlet of the first circulation pipeline 210 and the inlet of the first branch pipeline 230, and between the first circulation pipeline 210 and the inlet of the energy storage battery 220. This helps to improve the control convenience and accuracy of the valve, and also helps to improve the convenience of valve maintenance and repair.

[0073] In some embodiments, such as Figures 2 to 6As shown, the second valve structure 500 is a second three-way control valve 510. The second three-way control valve 510 is connected in series in the first branch pipe 230 and is located between the cold storage unit 300 and the liquid outlet of the first branch pipe 230. One end of the second branch pipe 240 is connected to the second three-way control valve 510.

[0074] In this embodiment, by setting a second three-way control valve 510, the flow between the outlets of the first circulation pipe 210 and the first branch pipe 230, as well as between the outlets of the first circulation pipe 210 and the second branch pipe 240, can be simultaneously controlled, thereby further saving installation space and reducing construction costs.

[0075] In other embodiments, the second valve structure 500 includes a third two-way control valve and a fourth two-way control valve. The third two-way control valve is connected in series in the first branch pipe 230 and is located between the cold storage unit 300 and the liquid outlet of the first branch pipe 230. The fourth two-way control valve is connected in series in the second branch pipe 240.

[0076] In this embodiment, the first circulation pipeline 210 and the first branch pipeline 230 outlet are connected and disconnected respectively through the third two-way control valve and the fourth two-way control valve, as well as the first circulation pipeline 210 and the second branch pipeline 240 outlet. This helps to improve the convenience and accuracy of valve control, and also helps to improve the convenience of valve maintenance and repair.

[0077] In some embodiments, the energy storage battery 220 has a discharge state and a first replenishment state, wherein the power of the discharge state is greater than the power of the first replenishment state. The discharge state can be a state in which the energy storage battery 220 provides electrical energy to an external electrical device, and the first replenishment state can be a state in which the energy storage battery 220 is replenished with electrical energy at a first power. The power of the discharge state is greater than the first power, and the discharge state can be an overcharge / discharge state.

[0078] Furthermore, such as Figure 7 and Figure 8 As shown and referenced Figure 3 The charging station thermal management system 10 also includes a controller 600 electrically connected to the energy storage battery 220. The controller 600, the first valve structure 400, and the second valve structure 500 are electrically connected. The controller 600 is configured to control the charging station thermal management system 10 to switch to a first operating mode when the energy storage battery 220 is in a discharging state. Optionally, the energy storage battery 220 can be electrically connected to the controller 600 via a wireless communication module or a signal line.

[0079] This embodiment proposes an application scenario where the charging station thermal management system 10 switches to the first operating mode. When the energy storage battery 220 is in a discharging state, the charging station thermal management system 10 is controlled to switch to the first operating mode. At this time, the cold storage unit 300 releases cold energy, which, together with the cooling circuit 100, dissipates heat from the energy storage battery 220 to meet the high-power heat dissipation requirements, thereby improving the safety and reliability of the energy storage battery 220.

[0080] In some embodiments, such as Figure 7 , Figure 8 As shown and referenced Figure 3 The charging station thermal management system 10 also includes a first temperature sensor 700 disposed between the liquid inlet of the energy storage battery 220 and the liquid outlet of the first branch pipe 230. The first temperature sensor 700 is configured to acquire the inlet temperature of the energy storage battery 220. The controller 600 is electrically connected to the first temperature sensor 700. The first valve structure 400 is also used to adjust the first opening degree between the liquid inlet of the first circulation pipe 210 and the first branch pipe 230 and the second opening degree between the first circulation pipe 210 and the liquid inlet of the energy storage battery 220. When the charging station thermal management system 10 is in the first working mode, the controller 600 is also configured to control the first valve structure 400 to adjust the first opening degree and the second opening degree according to the relationship between the inlet temperature of the energy storage battery 220 and the first preset temperature.

[0081] In this embodiment, when the charging station thermal management system 10 is in the first operating mode, the controller 600 can also adjust the first opening degree and the second opening degree of the first valve structure 400 according to the inlet temperature of the energy storage battery 220. This allows for flexible allocation of coolant in the first circulation pipe 210 and the first branch pipe 230, achieving precise control of the inlet temperature of the energy storage battery 220. This ensures that the energy storage battery 220 operates within a safe temperature range, thereby improving its safety and reliability, and consequently, the safety and reliability of the charging station thermal management system 10. Furthermore, it reduces energy waste caused by over-cooling or under-cooling, improving the energy utilization rate of the charging station thermal management system 10.

[0082] It should be noted that when the first valve structure 400 is a three-way valve, it can be a three-way proportional regulating valve, which, under the control of the controller 600, adjusts the first opening degree and the second opening degree. Similarly, when the first valve structure 400 is two two-way valves, it can be two two-way proportional regulating valves, which, under the control of the controller 600, adjust the first opening degree and the second opening degree. Furthermore, the first preset temperature is a key temperature value pre-set based on the optimal operating temperature range of the energy storage battery 220 and the design requirements of the charging station thermal management system 10.

[0083] In some embodiments, such as Figure 9 As shown, the first preset temperature includes a first sub-preset temperature and a second sub-preset temperature. The second sub-preset temperature is greater than the first sub-preset temperature. When the inlet temperature of the energy storage battery 220 is less than the first sub-preset temperature, the first valve structure 400 is controlled to decrease the first opening degree and increase the second opening degree. When the inlet temperature of the energy storage battery 220 is greater than the second sub-preset temperature, the first valve structure 400 is controlled to increase the first opening degree and decrease the second opening degree.

[0084] This embodiment proposes a specific method for the controller 600 to control the first valve structure 400 to adjust the first opening degree and the second opening degree. First, the first preset temperature is further divided into a first sub-preset temperature and a second sub-preset temperature, with the second sub-preset temperature being greater than the first sub-preset temperature. In this way, a more precise monitoring range is set for the inlet temperature of the energy storage battery 220.

[0085] The first sub-preset temperature can be the ideal operating temperature of the energy storage battery 220 minus a fixed value, and the second sub-preset temperature can be the ideal operating temperature of the energy storage battery 220 plus that fixed value. Assuming the ideal operating temperature of the energy storage battery 220 is somewhere between 16-22℃ and the fixed value is somewhere between 1-2℃, once the ideal operating temperature and the fixed value are determined, the first and second sub-preset temperatures are also determined. For example, if the ideal operating temperature is 18℃ and the fixed value is 2℃, then the first sub-preset temperature is 16℃ and the second sub-preset temperature is 20℃. The above is only an example; the specific choice can be made flexibly according to the actual situation.

[0086] Subsequently, the controller 600 controls the first opening degree and the second opening degree based on the relationship between the inlet temperature of the energy storage battery 220 and the first and second sub-preset temperatures. When the inlet temperature is lower than the first sub-preset temperature, it indicates that the current cooling capacity is too large for the energy storage battery 220, causing it to be in an overcooled state. At this time, the controller 600 controls the first valve structure 400 to reduce the first opening degree and increase the second opening degree, thereby limiting the flow of coolant into the first branch pipe 230, and thus reducing the amount of cold released by the cold storage unit 300, allowing the energy storage battery 220 to quickly return to the appropriate operating temperature range.

[0087] When the inlet temperature exceeds the second preset temperature, it indicates that the current cooling capacity is insufficient for the energy storage battery 220, causing it to overheat. At this time, the controller 600 controls the first valve structure 400 to reduce the second opening and increase the first opening, increasing the flow rate of coolant into the first branch pipe 230, thereby increasing the cooling capacity released by the cold storage unit 300 and causing the energy storage battery 220 to cool down to a suitable operating temperature range.

[0088] When the inlet temperature is between the first sub-preset temperature and the second sub-preset temperature, the first opening degree and the second opening degree remain unchanged.

[0089] Based on the above process, the operating temperature of the energy storage battery 220 can be stabilized within an optimal range, which helps to further improve the service life and reliability of the energy storage battery 220, and consequently, the service life and reliability of the charging station thermal management system 10. Furthermore, by precisely controlling the flow direction and flow rate of the coolant according to the specific inlet temperature of the energy storage battery 220, over- or under-cooling can be avoided, reducing unnecessary energy consumption and thus further improving system energy efficiency.

[0090] In some embodiments, such as Figure 4 , Figure 10 and Figure 11 As shown, the charging station thermal management system 10 also includes a second temperature sensor 800, which is configured to acquire the current temperature of the cold storage unit 300. The controller 600 is also electrically connected to the second temperature sensor 800. The controller 600 is configured to control the charging station thermal management system 10 to switch to a second working mode when the energy storage battery 220 is in a first energy replenishment state and the current temperature of the cold storage unit 300 is less than or equal to a second preset temperature.

[0091] This embodiment proposes an application scenario where the charging station thermal management system 10 switches to the second operating mode. The second preset temperature refers to the temperature at which the cold storage unit 300 is fully charged. When the current temperature of the cold storage unit 300 is less than or equal to this second preset temperature, it indicates that the cold storage unit 300 is fully charged. At this time, when the energy storage battery 220 is in the first charging state, the charging station thermal management system 10 switches to the second operating mode, and the cooling capacity of the cooling circuit 100 is used to cool the energy storage battery 220. That is, the cooling capacity of the cooling circuit 100 alone can meet the heat dissipation requirements of the energy storage battery 220 in the first charging state, and the operating power of the cooling circuit 100 can be matched with the power of the first charging state, while the cold storage unit 300 is in a fully charged state. This helps to reduce the operating energy consumption of the charging station thermal management system 10 and improve the stability of operation.

[0092] In some embodiments, such as Figure 5 , Figure 10 and Figure 11 As shown, the controller 600 is also configured to control the charging station thermal management system 10 to switch to a third working mode when the energy storage battery 220 is in a first energy replenishment state and the current temperature of the cold storage unit 300 is greater than a second preset temperature.

[0093] This embodiment proposes an application scenario where the charging station thermal management system 10 switches to the third operating mode. When the current temperature of the cold storage unit 300 is greater than the second preset temperature, it indicates that the cold storage unit 300 has not fully stored its cooling capacity. At this time, with the energy storage battery 220 in the first recharge state, the charging station thermal management system 10 switches to the third operating mode. Part of the cooling capacity of the cooling circuit 100 is used to cool the energy storage battery 220, and the other part is used to store cooling capacity for the cold storage unit 300. This allows for automatic replenishment of the cooling capacity of the cold storage unit 300, ensuring it has sufficient cooling capacity during use, thereby improving the stability and reliability of the charging station thermal management system 10.

[0094] In some embodiments, such as Figure 6 , Figure 10 and Figure 11 As shown, the energy storage battery 220 has a second energy replenishment state, and the power of the first energy replenishment state is greater than the power of the second energy replenishment state. The controller 600 is also configured to control the charging station thermal management system 10 to switch to the fourth working mode when the energy storage battery 220 is in the second energy replenishment state and the current temperature of the cold storage unit 300 is greater than the preset temperature.

[0095] This embodiment proposes an application scenario where the charging station thermal management system 10 switches to the fourth operating mode. The second energy replenishment state can be the slow charging energy replenishment state of the energy storage battery 220, or it can be the standby state of the energy storage battery 220. The first energy replenishment state can be the fast charging energy replenishment state of the energy storage battery 220. In the second energy replenishment state, the power of the energy storage battery 220 is lower and the heat dissipation is less.

[0096] When the current temperature of the cold storage unit 300 is higher than the second preset temperature, it indicates that the cold storage unit 300 has not stored enough cold energy. At this time, with the energy storage battery 220 in the second recharge state, the charging station thermal management system 10 switches to the fourth operating mode. The cold energy of the cooling circuit 100 is used entirely to store cold energy for the cold storage unit 300, while the heat dissipation of the energy storage battery 220 is achieved through natural cooling. This further improves the cold storage efficiency of the cold storage unit 300, ensuring it has sufficient cold energy during use, thereby contributing to further improving the stability and reliability of the charging station thermal management system 10.

[0097] In some embodiments, such as Figure 4 , Figure 10 and Figure 11 As shown, the controller 600 is also configured to control the charging station thermal management system 10 to switch to the second working mode when the energy storage battery 220 is in the second energy replenishment state and the current temperature of the cold storage unit 300 is less than or equal to the second preset temperature.

[0098] In this embodiment, when the current temperature of the cold storage unit 300 is less than or equal to the second preset temperature, it indicates that the cold storage unit 300 is fully charged. At this time, when the energy storage battery 220 is in the second recharge state, the charging station thermal management system 10 switches to the second operating mode, and the cooling capacity of the cooling circuit 100 is used to cool the energy storage battery 220. That is, the cooling capacity of the cooling circuit 100 alone can meet the heat dissipation requirements of the energy storage battery 220 in the second recharge state, and the operating power of the cooling circuit 100 can be matched with the power of the second recharge state, while the cold storage unit 300 is in a fully charged state. This helps to reduce the operating energy consumption of the charging station thermal management system 10 and improve the stability of operation.

[0099] In some embodiments, such as Figure 1 and Figure 2 As shown, the refrigeration circuit 100 also includes a refrigerant line 120, a compressor 130, and a condenser 140. The evaporator 110, compressor 130, and condenser 140 are all connected in series in the refrigerant line 120. Thus, the refrigerant refrigeration circuit 100 is constructed, which is the active refrigeration circuit of the charging station thermal management system 10.

[0100] Furthermore, the battery circulation loop 200 also includes a first pump 250 connected in series in the first circulation pipe 210, a third branch pipe 260 connected in parallel with the evaporator 110, and an electric heating unit 270 disposed in the third branch pipe 260.

[0101] This configuration allows the electric heating unit 270 to act as a heat source, supplying heat to the first circulation pipe 210. In certain operating conditions, such as when the ambient temperature is too low and the energy storage battery 220 is not operating, resulting in a low coolant temperature, the electric heating unit 270 can activate, maintaining the coolant temperature in the first circulation pipe 210 within a suitable temperature range. This further improves the reliability and stability of the charging station thermal management system 10. Furthermore, the cooling circuit 100 provides cooling, and the electric heating unit 270 provides heat; their combined operation allows for more precise regulation of the coolant temperature, ensuring that the energy storage battery 220 is always within its optimal operating temperature range. This enhances the adaptability of the charging station thermal management system 10 to actual operating conditions, thereby further ensuring the stable operation of the charging station.

[0102] In some embodiments, such as Figure 12As shown, the charging station thermal management system 10 also includes a charging gun 910, a current converter 920, and a cooling circuit 1000. The charging gun 910 and the current converter 920 are both electrically connected to the energy storage battery 220. The cooling circuit 1000 includes a second circulation pipe 1100 and a second pump 1200, a heat exchanger 1300, and an air outlet 1400 for dissipating heat from the heat exchanger 1300, all connected in series in the second circulation pipe 1100. The charging gun 910 and the current converter 920 are connected in series or in parallel in the second circulation pipe 1100.

[0103] The charging gun 910 can be connected to an external electrical device to deliver power from the energy storage battery 220 to the device. The current converter 920 includes a DC-to-AC converter 921 and an AC-to-DC converter 922, enabling the conversion between AC and DC power. The second pump 1200 drives the coolant in the second circulation pipe 1100 to flow to the charging gun 910 and the current converter 920. The coolant absorbs the heat generated during the operation of these components, causing its temperature to rise. The coolant then enters the heat exchanger 1300, where it exchanges heat with the air through the air outlet 1400, lowering its temperature and thus forming a circulation.

[0104] This embodiment, by setting up a cooling circuit 1000, can achieve heat dissipation for the charging gun 910 and the current converter 920, thereby helping to further improve the reliability and safety of the charging station thermal management system 10.

[0105] It should be noted that the charging gun 910 and the current converter 920 are connected in series or parallel to the second circulation pipeline 1100. For example... Figure 10 As shown, when connected in parallel, the coolant will be simultaneously diverted to the branch containing the charging gun 910 and the current converter 920, cooling both of them at the same time; when connected in series, the coolant will flow through the charging gun 910 and the current converter 920 in sequence, cooling both of them.

[0106] In some embodiments, the air outlet 1400 is also used to dissipate heat from the condenser 140. The condenser 140 is a component in the refrigeration circuit 100. In the condenser 140, the gaseous refrigerant releases heat to the external environment and then condenses into a liquid state. In this embodiment, the air outlet 1400 of the cooling circuit 1000 can dissipate heat from both the heat exchanger 1300 and the condenser 140. Therefore, on the one hand, this improves the cooling efficiency and stability of the refrigeration circuit 100; on the other hand, it eliminates the need for additional components to dissipate heat from the condenser 140, making the overall system layout more compact and concise, thereby reducing costs and saving space.

[0107] It is understood that there are various ways to achieve the simultaneous heat dissipation of the condenser 140 and the heat exchanger 1300 by the air outlet 1400. For example, the condenser 140 and the heat exchanger 1300 can be a one-piece molded structure; or the condenser 140 and the heat exchanger 1300 can share the same air duct, with the air outlet 1400 located on the air vent. This application does not impose any restrictions on this.

[0108] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0109] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0110] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0111] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0112] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0113] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A thermal management system for charging stations, characterized in that, include: Refrigeration circuit, including evaporator; The battery circulation loop includes a first circulation pipeline, an energy storage battery connected in series in the first circulation pipeline, and a first branch pipeline connected in parallel with the first circulation pipeline. The first circulation pipeline is connected to the evaporator, and the liquid inlet and liquid outlet of the first branch pipeline are located between the liquid outlet of the evaporator and the liquid inlet of the energy storage battery. A cold storage unit is connected in series in the first branch pipeline; as well as The first valve structure is used to control the connection and disconnection between the liquid inlet of the first circulation pipeline and the first branch pipeline, and the liquid inlet of the energy storage battery.

2. The charging station thermal management system according to claim 1, characterized in that, The first valve structure is a first three-way control valve, and the first circulation pipeline is connected to the liquid inlet of the first branch pipeline and the liquid inlet of the energy storage battery through the first three-way control valve. Alternatively, the first valve structure includes a first two-way control valve and a second two-way control valve, the first circulation pipeline is connected to the inlet of the first branch pipeline through the first two-way control valve, and the first circulation pipeline is connected to the inlet of the energy storage battery through the second two-way control valve.

3. The charging station thermal management system according to claim 1, characterized in that, The outlet side of the cold storage unit is also connected to the first circulation pipeline through a second branch pipeline, and the liquid outlet of the second branch pipeline is located between the liquid outlet of the energy storage battery and the liquid inlet of the evaporator. The charging station thermal management system further includes a second valve structure, which is used to control the connection and disconnection between the liquid outlet of the first circulation pipeline and the liquid outlet of the first branch pipeline, and the liquid outlet of the second branch pipeline.

4. The charging station thermal management system according to claim 3, characterized in that, The second valve structure is a second three-way control valve. The second three-way control valve is connected in series in the first branch pipe and is located between the cold storage unit and the liquid outlet of the first branch pipe. One end of the second branch pipe is connected to the second three-way control valve. Alternatively, the second valve structure includes a third two-way control valve and a fourth two-way control valve, wherein the third two-way control valve is connected in series in the first branch pipe and located between the cold storage unit and the liquid outlet of the first branch pipe, and the fourth two-way control valve is connected in series in the second branch pipe.

5. The charging station thermal management system according to claim 3, characterized in that, The charging station thermal management system has a first working mode, a second working mode, a third working mode and a fourth working mode; In the first working mode, the inlet and outlet of the first circulation pipeline are connected to the inlet and outlet of the first branch pipeline, the inlet of the energy storage battery is connected to the first branch pipeline, and the outlet of the second branch pipeline is disconnected from the first circulation pipeline. In the second working mode, the inlet of the first circulation pipeline is disconnected from the inlet of the first branch pipeline, the inlet of the energy storage battery is connected to the first circulation pipeline, and the outlet of the second branch pipeline is disconnected from the first circulation pipeline. In the third working mode, the inlet of the first circulation pipeline is connected to the inlet of the first branch pipeline and the inlet of the energy storage battery, the outlet of the first branch pipeline is disconnected from the first circulation pipeline, and the outlet of the second branch pipeline is connected to the first circulation pipeline. In the fourth operating mode, the first circulation pipeline is disconnected from the liquid inlet of the energy storage battery, the liquid inlets of the first circulation pipeline and the first branch pipeline are connected, the liquid outlet of the first branch pipeline is disconnected from the first circulation pipeline, and the liquid outlet of the second branch pipeline is connected to the first circulation pipeline.

6. The charging station thermal management system according to claim 5, characterized in that, The energy storage battery has a discharging state and a first replenishing state, wherein the power of the discharging state is greater than the power of the first replenishing state, and the charging station thermal management system further includes: The controller is electrically connected to the energy storage battery, the first valve structure, and the second valve structure. The controller is configured to control the charging station thermal management system to switch to the first working mode when the energy storage battery is in the energy dissipation state.

7. The charging station thermal management system according to claim 6, characterized in that, The charging station thermal management system further includes a first temperature sensor located between the liquid inlet of the energy storage battery and the liquid outlet of the first branch pipe. The first temperature sensor is configured to acquire the inlet temperature of the energy storage battery, and the controller is electrically connected to the first temperature sensor. The first valve structure is also used to adjust the first opening degree between the liquid inlets of the first circulation pipeline and the first branch pipeline, and the second opening degree between the liquid inlet of the first circulation pipeline and the liquid inlet of the energy storage battery. In the first operating mode, the controller is further configured to control the first valve structure to adjust the first opening degree and the second opening degree according to the relationship between the inlet temperature of the energy storage battery and the first preset temperature.

8. The charging station thermal management system according to claim 7, characterized in that, The first preset temperature includes a first sub-preset temperature and a second sub-preset temperature, wherein the second sub-preset temperature is greater than the first sub-preset temperature; When the inlet temperature of the energy storage battery is lower than the first preset temperature, the first valve structure is controlled to reduce the first opening degree and increase the second opening degree. When the inlet temperature of the energy storage battery is greater than or equal to the second preset temperature, the first valve structure is controlled to increase the first opening degree and decrease the second opening degree.

9. The charging station thermal management system according to claim 6, characterized in that, The charging station thermal management system further includes a second temperature sensor, which is configured to acquire the current temperature of the cold storage unit. The controller is electrically connected to the second temperature sensor, and the controller is further configured to control the charging station thermal management system to switch to the second working mode when the energy storage battery is in the first energy replenishment state and the current temperature of the cold storage unit is less than or equal to the second preset temperature.

10. The charging station thermal management system according to claim 9, characterized in that, The controller is also configured to control the charging station thermal management system to switch to the third working mode when the energy storage battery is in the first energy replenishment state and the current temperature of the cold storage unit is greater than the second preset temperature.

11. The charging station thermal management system according to claim 9, characterized in that, The energy storage battery has a second replenishment state, and the power of the first replenishment state is greater than the power of the second replenishment state. The controller is also configured to control the charging station thermal management system to switch to the fourth working mode when the energy storage battery is in the second energy replenishment state and the current temperature of the cold storage unit is greater than the second preset temperature.

12. The charging station thermal management system according to claim 11, characterized in that, The controller is also configured to control the charging station thermal management system to switch to the second working mode when the energy storage battery is in the second energy replenishment state and the current temperature of the cold storage unit is less than or equal to the second preset temperature.

13. The charging station thermal management system according to claim 1, characterized in that, The refrigeration circuit also includes a refrigerant pipeline, a compressor, and a condenser, wherein the evaporator, the compressor, and the condenser are all connected in series in the refrigerant pipeline; The battery circulation loop also includes a first pump connected in series in the first circulation pipeline, a third branch pipeline connected in parallel with the evaporator, and an electric heating unit disposed in the third branch pipeline.

14. The charging station thermal management system according to claim 13, characterized in that, The charging station thermal management system also includes: Both the charging gun and the current converter are electrically connected to the energy storage battery. The cooling circuit includes a second circulation pipeline, a second pump connected in series in the second circulation pipeline, a heat exchanger, and an air outlet for dissipating heat from the heat exchanger. The charging gun and the current converter are connected in series or in parallel in the second circulation pipeline.

15. The charging station thermal management system according to claim 14, characterized in that, The air outlet is also used to dissipate heat from the condenser.

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