energy storage system

Abstract

The application discloses an energy storage system, and belongs to the technical field of energy storage. The energy storage system comprises a plurality of batteries stacked in the vertical direction, a power converter installed on the batteries, a heat management system comprising a communication pipeline, a heat accumulator and a heat radiator which are in communication with each other, the communication pipeline is used for heat exchange with the batteries and the power converter, and the heat radiator is installed on the heat accumulator. According to the energy storage system, the heat dissipation and heat exchange efficiency can be improved, the temperature control effect of the batteries and the power converter can be improved, the waste heat of the equipment can be recycled, the power consumption of heat dissipation can be reduced, the energy efficiency and economy of the energy storage system can be improved, the fluid resistance caused by long-distance laying of the communication pipeline can be reduced, and the overall heat exchange efficiency can be improved.

Description

Technical Field

[0001] This application belongs to the field of energy storage technology, and in particular relates to an energy storage system. Background Technology

[0002] In energy storage systems, batteries and power converters generate heat during operation. Prolonged high battery temperatures may accelerate aging or shorten lifespan, while prolonged high power converter temperatures may lead to overheating derating, affecting the operational stability of the energy storage system. In related technologies, some energy storage system thermal management systems employ self-cooling or air cooling, but these methods have low heat exchange efficiency and low energy efficiency; others use liquid cooling, but this is less economical. Summary of the Invention

[0003] This application aims to address at least one of the technical problems existing in related technologies. To this end, this application proposes an energy storage system that can improve the energy efficiency and economy of energy storage systems.

[0004] In a first aspect, this application provides an energy storage system, comprising: Multiple batteries stacked vertically, and a power converter mounted on the batteries; A thermal management system includes interconnected piping, a heat accumulator, and a radiator. The connecting piping is used for heat exchange with the battery and the power converter, and the radiator is installed on the heat accumulator.

[0005] According to the energy storage system of this application, by switching the working mode based on the battery temperature and the temperature of the heat exchange medium in the heat storage device, the heat dissipation efficiency can be improved, the temperature control effect of the battery and the power converter can be improved, the waste heat of the equipment can be recovered, the heat dissipation power consumption can be reduced, and the energy efficiency and economy of the energy storage system can be improved. By setting the battery, power converter and thermal management system close together, the fluid resistance caused by the long-distance laying of connecting pipelines can be reduced, which helps to improve the overall heat exchange efficiency.

[0006] According to one embodiment of this application, the energy storage system includes: A heat insulation component is provided, with the battery and the power converter located on opposite sides of the heat insulation component.

[0007] According to one embodiment of this application, the energy storage system includes: The first heat exchange plate, the connecting pipe exchanges heat with the battery through the first heat exchange plate, and the first heat exchange plate and the battery are located on the first side of the heat insulation component; The second heat exchange plate is used to exchange heat with the power converter through the connecting pipe. The second heat exchange plate and the power converter are located on the second side of the heat insulation component.

[0008] According to one embodiment of this application, the battery includes: First shell; A single battery cell, wherein a plurality of the single battery cells are mounted on the first housing; The first heat insulation pad is provided between the battery cell and the first housing.

[0009] According to one embodiment of this application, the power converter includes: Second shell; The power converter body is mounted in the second housing; The second heat insulation pad is provided between the power converter body and the second housing.

[0010] According to one embodiment of this application, the thermal management system includes: The drive pump is connected to the connecting pipeline, the heat accumulator, and the radiator.

[0011] According to one embodiment of this application, the thermal management system includes: The valve assembly has its first to sixth valve ports selectively connected. The first valve port of the valve assembly is connected to the first port of the connecting pipeline, the second valve port of the valve assembly is connected to the second port of the connecting pipeline, the third valve port of the valve assembly is connected to the inlet of the heat accumulator, the fourth valve port of the valve assembly is connected to the flow path inlet of the radiator, the fifth valve port of the valve assembly is connected to the outlet of the drive pump, and the sixth valve port of the valve assembly is connected to the inlet of the drive pump.

[0012] According to one embodiment of this application, the thermal management system has a first heat dissipation working mode, in which the drive pump, the connecting pipe, the flow path of the radiator and the heat storage device are connected sequentially from end to end.

[0013] According to one embodiment of this application, the thermal management system has a second heat dissipation operating mode, in which the drive pump, the flow path of the radiator, and the heat accumulator are connected sequentially from end to end.

[0014] According to one embodiment of this application, the thermal management system has a heat storage working mode, in which the drive pump, the connecting pipeline, and the heat accumulator are connected sequentially from end to end.

[0015] According to one embodiment of this application, the thermal management system has a uniform temperature operating mode, in which the drive pump and the connecting pipeline are connected end to end in sequence.

[0016] According to one embodiment of this application, the heat accumulator is provided with a heater, and the outlet of the heat accumulator can be selectively connected to a water supply port.

[0017] According to one embodiment of this application, The connecting pipeline includes a main heat exchange pipe and branch heat exchange pipes. The main heat exchange pipe is interconnected with the flow paths of the heat accumulator and the radiator. The inlet and outlet of the branch heat exchange pipes are both connected to the main heat exchange pipe. The branch heat exchange pipes are used for heat exchange with the battery and the power converter. or, The connecting pipes include a pair connected in series, and the pair of connecting pipes are respectively used for heat exchange with the battery and the power converter; or, One side of the connecting pipe is used for heat exchange with the battery, and the other side of the heat exchange pipe is used for heat exchange with the power converter. or, The heat storage device and the connecting pipe each include a pair, and the pair of connecting pipes are respectively used for heat exchange with the battery and the power converter. The heat storage device and the connecting pipe correspond one-to-one. Each connecting pipe can be selectively connected to the corresponding heat storage device. Each pair of connecting pipes can be selectively connected to the radiator. or, The heat storage device and the connecting pipe each include a pair, and the pair of connecting pipes are respectively used for heat exchange with the battery and the power converter. The heat storage device and the connecting pipe correspond one-to-one. The connecting pipe used for heat exchange with the battery can be selectively connected to the heat sink, and the connecting pipe used for heat exchange with the power converter is not connected to the heat sink.

[0018] According to one embodiment of this application, The heat sink includes: Third shell; A partition is installed inside the radiator housing, and the radiator housing and the partition together form the flow path of the radiator; Multiple heat dissipation fins are mounted on the housing; or, The heat sink includes: Water inlet pipe; A water outlet pipe, the outlet of which is connected to the inlet of the heat accumulator; Multiple heat sinks, the flow channels of the heat sinks being connected to the inlet pipe and the outlet pipe, the inlet pipe, the outlet pipe and the flow channels of the multiple heat sinks together forming the flow path of the radiator; or, The heat sink includes: Shunt; A manifold, the outlet of which is connected to the inlet of the heat accumulator; Multiple heat dissipation pipes are connected to the splitter and the combiner, and the splitter, the combiner and the multiple heat dissipation pipes together form the flow path of the heat dissipation device; Multiple fins are mounted on the heat dissipation tube.

[0019] According to one embodiment of this application, the energy storage system includes a first heat exchange plate, and the connecting pipe exchanges heat with the individual cells of the battery through the first heat exchange plate; wherein... The first side of the battery cell unit mates with the first heat exchange plate; or, The second side of the battery cell unit mates with the first heat exchange plate; or, The bottom surface of the battery cell unit mates with the first heat exchange plate.

[0020] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0021] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the energy storage system provided in the embodiments of this application; Figure 2 This is one of the partial structural schematic diagrams of the energy storage system provided in the embodiments of this application; Figure 3 This is a second partial structural schematic diagram of the energy storage system provided in the embodiments of this application; Figure 4 This is a schematic diagram of the battery structure provided in the embodiments of this application; Figure 5 yes Figure 3 Cross-sectional view at point AA; Figure 6 yes Figure 5 A magnified view of a section at point I; Figure 7 yes Figure 3 Cross-sectional view at point BB; Figure 8 yes Figure 7 Enlarged view of a section at point II; Figure 9 This is the third partial structural schematic diagram of the energy storage system provided in the embodiments of this application; Figure 10 This is the fourth partial structural schematic diagram of the energy storage system provided in the embodiments of this application; Figure 11 yes Figure 10 Cross-sectional view at point CC; Figure 12 This is one of the structural schematic diagrams of the heat sink provided in the embodiments of this application; Figure 13 This is a second schematic diagram of the structure of the heat sink provided in the embodiments of this application; Figure 14 This is the third schematic diagram of the structure of the heat sink provided in the embodiments of this application; Figure 15 This is the fifth partial structural schematic diagram of the energy storage system provided in the embodiments of this application; Figure 16 This is a partial structural schematic diagram of the energy storage system provided in the embodiments of this application; Figure 17 This is the seventh partial structural schematic diagram of the energy storage system provided in the embodiments of this application; Figure 18 This is the eighth of the partial structural schematic diagrams of the energy storage system provided in the embodiments of this application; Figure 19 This is the ninth partial structural schematic diagram of the energy storage system provided in the embodiments of this application; Figure 20 This is the tenth partial structural schematic diagram of the energy storage system provided in the embodiments of this application; Figure 21 This is eleventh of the partial structural schematic diagrams of the energy storage system provided in the embodiments of this application; Figure 22 This is 12 of the partial structural schematic diagrams of the energy storage system provided in the embodiments of this application; Figure 23 This is thirteenth of the partial structural schematic diagrams of the energy storage system provided in the embodiments of this application; Figure 24 This is the fourteenth partial structural schematic diagram of the energy storage system provided in the embodiments of this application; Figure 25 This is a partial structural schematic diagram of the energy storage system provided in the embodiments of this application, number fifteen. Figure 26 This is a partial structural schematic diagram of the energy storage system provided in the embodiments of this application, number sixteen. Figure 27 This is the seventeenth partial structural schematic diagram of the energy storage system provided in the embodiments of this application; Figure 28 This is the eighteenth partial structural schematic diagram of the energy storage system provided in the embodiments of this application.

[0022] Figure label: 10. Energy storage system; 100. Battery; 110. Single cell; 1101. First side surface; 1102. Second side surface; 1103. Bottom surface; 120. Cover plate; 130. Busbar; 140. End plate; 150. First housing; 160. Thermal insulation adhesive; 170. First thermal insulation pad; 181. First heat exchange plate; 182. First thermally conductive adhesive; 190. First thermal insulation layer; 200 Power converter; 210 Power converter body; 220 Busbar; 230 Second housing; 240 Second heat insulation pad; 251 Second heat exchange plate; 252 Second thermally conductive adhesive; 260 Heat insulation component; 300. Distribution box; 320. Second insulation layer; 400. Base; 700. Thermal Management System; 710. Drive pump; 720. Radiator; 7211. Third housing; 7212. Partition; 7213. Heat dissipation fins; 7221. Inlet pipe; 7222. Outlet pipe; 7223. Heat dissipation fins; 7231. Diverter; 7232. Combiner; 7233. Heat dissipation tube; 7234. Fins; 730. Heat accumulator; 731. Heat accumulator shell; 732. Insulation layer; 733. Heater; 734. Temperature sensor; 735. Heat storage chamber; 740. Water supply outlet; 760. Valve assembly; 761. First valve port; 762. Second valve port; 763. Third valve port; 764. Fourth valve port; 765. Fifth valve port; 766. Sixth valve port; 770. Connecting pipes; 771. Main heat exchanger pipes; 772. Branch heat exchanger pipes; 7721. First section; 7722. Second section; 783. Accumulator inlet pipe; 784. Radiator inlet pipe; 785. Valve group first connecting pipe; 786. Valve group second connecting pipe; 787. Accumulator outlet pipe; 788. Make-up pipe; 789. Radiator outlet pipe. Detailed Implementation

[0023] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0024] The following is for reference. Figures 1-28 Describes an energy storage system 10 according to an embodiment of this application.

[0025] Energy storage system 10 is an integrated electrical system that realizes electrical energy storage and external output based on the principle of electrochemical energy storage.

[0026] like Figures 1-28 As shown, the energy storage system 10 includes a battery 100, a power converter 200, and a thermal management system 700. Multiple batteries 100 are stacked vertically. The power converter 200 is mounted on the battery 100. The thermal management system 700 includes interconnected conduits 770, a radiator 720, and a heat storage device 730. The conduits 770 are used for heat exchange with the battery 100 and the power converter 200, and the radiator 720 is mounted on the heat storage device 730.

[0027] In this embodiment, the battery 100 is an electrochemical device capable of bidirectional conversion between chemical and electrical energy, and can perform energy storage and release operations. Multiple batteries 100 can be stacked vertically, and a first heat insulation layer 190 can be provided between adjacent batteries 100 to reduce heat exchange between them. Each battery 100 can be equipped with a temperature sensor, which can be a negative temperature coefficient thermistor (NTC), a platinum resistance temperature sensor, or a thermocouple temperature sensor. When multiple batteries 100 are included, each battery 100 can be equipped with a temperature sensor. The average value of the detected values ​​from the temperature sensors of the multiple batteries 100 is Tc, the minimum value is Tmin, and the maximum value is Tmax.

[0028] The power converter 200 is a power conversion device that can adjust the voltage specifications or AC / DC properties of the electrical energy. It can be used to coordinate the output power of the battery 100 and the power parameters of external electrical devices. The power converter 200 can be installed on one of the surfaces of the battery 100. When the battery 100 is cuboid or cubic, the power converter 200 can be installed on one of the six surfaces of the battery 100. For example, the power converter 200 can be installed on the surface of the battery 100 that is away from the user to reduce the impact of the heat dissipated by the power converter 200 on the user.

[0029] The thermal management system 700 is a temperature control system that regulates the temperature of the battery 100 and the power converter 200 by circulating a heat exchange medium. The heat exchange medium can be deionized water, ethylene glycol aqueous solution, heat transfer oil, or fluorinated liquid. The thermal management system 700 includes connecting pipes 770, a radiator 720, and a heat storage tank 730.

[0030] The radiator 720 is a heat exchange device capable of dissipating heat carried by the heat exchange medium. The radiator 720 can be a heat exchange device based on forced air cooling or liquid-cooled plate heat exchange principles. In some embodiments, the radiator 720 employing the forced air cooling principle can have air supply components arranged on the side of the heat dissipation fins 7234, relying on flowing air to remove heat from the surface of the fins 7234; the radiator 720 employing the liquid-cooled plate heat exchange principle can stack multiple layers of heat exchange flow channels, relying on an external low-temperature medium to complete heat exchange.

[0031] The heat accumulator 730 is a thermal energy storage device capable of temporarily storing the waste heat of the heat exchange medium. The heat accumulator 730 may include a heat storage shell 731 and an insulation layer 732. The heat storage shell 731 is a closed or semi-closed shell that encloses an external space, protecting the insulation layer 732 and the heat exchange medium inside. The insulation layer 732 is a heat-insulating material with a low thermal conductivity coefficient. The insulation layer 732 can be located inside the heat storage shell 731, and a heat storage chamber 735 can be formed inside the insulation layer 732. The insulation layer 732 can be made of polyurethane foam or aluminum silicate insulation cotton, which helps reduce the rate at which heat energy inside the heat storage chamber 735 is lost to the outside through the heat storage shell 731, thus helping to extend the retention time of waste heat inside the heat storage chamber 735. The heat accumulator 730 may be equipped with a replenishment pipe 788, one end of which is connected to the interior of the heat storage chamber 735, and the other end of which is connected to the outside of the heat accumulator 730 shell. This facilitates the replenishment of the heat exchange medium lost inside the heat storage chamber 735, helping to maintain the heat exchange medium level inside the heat storage chamber 735 within a suitable range. The heat accumulator 730 may be equipped with a temperature sensor 734, which is a sensor capable of acquiring real-time temperature data of the heat exchange medium inside the heat storage chamber 735. In some embodiments, the temperature sensor 734 may be a platinum resistance temperature sensing element or a thermocouple temperature sensing element. The detection value of the temperature sensor 734 is Tm.

[0032] The connecting pipe 770 is an integrated hollow pipe component, through which the heat exchange medium can travel and conduct heat through the pipe wall. The heat exchange medium flowing inside the connecting pipe 770 can exchange heat with the battery 100 and the power converter 200. For example, the heat exchange medium in the connecting pipe 770 can transfer heat to the battery 100 and the power converter 200; or, the heat exchange medium in the connecting pipe 770 can transfer cold energy to the battery 100 and the power converter 200. The connecting pipe 770 has a first port and a second port, which can be configured as inlet or outlet according to actual needs. For example, in some embodiments, the first port is the inlet of the connecting pipe 770, and the second port is the outlet; in other embodiments, the first port is the outlet, and the second port is the inlet.

[0033] The flow path outlet of the radiator 720 is communicated with the inlet of the heat accumulator 730, as Figure 11 shown in the figure, the flow path outlet of the radiator 720 may be communicated with the inlet of the heat accumulator 730 through the radiator liquid outlet pipe 789, that is, the heat exchange medium that has dissipated heat through the flow path of the radiator 720 can flow into the heat storage bin 735 of the heat accumulator 730 for storage or continue to flow through the heat storage bin 735.

[0034] The energy storage system 10 may further include a power distribution box 300. The power distribution box 300 is an electrical housing component integrating a plurality of wiring terminals and line protection components, which is capable of gathering various strong and weak electric wirings inside the energy storage system 10. The power distribution box 300 and the battery 100 may be arranged to be stacked in the vertical direction, and a first heat insulation layer 190 and a second heat insulation layer 320 may be disposed between the battery 100 and the power distribution box 300 to reduce heat exchange between the battery 100 and the power distribution box 300.

[0035] The energy storage system 10 may further include a base 400. The base 400 is a support base component for carrying other components in the energy storage system 10. The battery 100, the power converter 200 and the power distribution box 300 may be placed on the base 400, so as to isolate the battery 100, the power converter 200 and the power distribution box 300 from the complex environment of the bottom surface 1103, and reduce heat exchange between the battery 100, the power converter 200 and the power distribution box 300 and the bottom surface 1103. Certainly, the energy storage system 10 may also not be provided with the base 400, and the battery 100, the power converter 200 and the power distribution box 300 may be installed and used in a wall-mounted manner to reduce heat exchange between the battery 100, the power converter 200 and the power distribution box 300 and the bottom surface 1103.

[0036] The thermal management system 700 may have at least one of the following operating modes: First, as Figure 16 shown in the figure, the thermal management system 700 has a first heat dissipation operating mode, and in the first heat dissipation operating mode, the communication pipeline 770, the flow path of the radiator 720 and the heat accumulator 730 are communicated with each other.

[0037] Under at least one of the following conditions, the thermal management system 700 enters the first heat dissipation operating mode: First, when it is determined that the battery 100 and the power converter 200 are in the operating state, and Tc≥T3, Tm<Tc-ΔT1, the thermal management system 700 enters the first heat dissipation operating mode, where T3 is a high temperature threshold, and ΔT1 is a first temperature difference threshold.

[0038] In this case, the high temperature threshold T3 may satisfy: 45°C ≤ T3 ≤ 50°C, for example, T3 may be 45°C, 48°C or 50°C. ΔT1 is positively correlated with heat dissipation consumption. When the thermal management system 700 includes a drive pump 710, ΔT1 may be a calculation parameter negatively correlated with the flow rate of the drive pump 710. An excessively large ΔT1 will restrain the heat storage performance, and ΔT1 may satisfy: 0°C < ΔT1 ≤ 5°C, for example, ΔT1 may be 1°C, 3°C or 5°C. In actual operation, ΔT1 can be automatically controlled by the flow rate: an excessively high flow rate leads to an excessively small ΔT1, and an excessively low flow rate leads to an excessively large ΔT1. The battery 100 and the power converter 200 require heat dissipation during operation, the thermal management system 700 enters a first heat dissipation working mode, and the heat generated by the battery 100 and the power converter 200 is transferred to the outside through the radiator 720. For example, the battery 100 undergoes continuous high-intensity power charging and discharging, or the charging and discharging rate of the battery 100 is higher than the rated charging and discharging rate, both of which may lead to Tc ≥ T3; the heat generated by the battery 100 and the power converter 200 exceeds the rated heat storage capacity of the heat accumulator 730, which may lead to Tm < Tc - ΔT1. Under the condition that Tc ≥ T3 and Tm < Tc - ΔT1, the thermal management system 700 enters the first heat dissipation working mode to assist the heat dissipation of the battery 100 and the power converter 200.

[0039] Secondly, when it is determined that the battery 100 and the power converter 200 are about to be in an operating state, and Tc ≥ T2, T2 - ΔT1 ≤ Tm < Tc - ΔT1, the thermal management system 700 enters the first heat dissipation working mode, where T2 is the ambient temperature threshold.

[0040] In this case, the ambient temperature threshold T2 may satisfy: 20°C ≤ T2 ≤ 35°C, for example, T2 may be 20°C, 30°C or 35°C. The state that the battery 100 and the power converter 200 are about to be in operation may be a state where the battery 100 and the power converter 200 will start after 1h-2h, for example, the battery 100 and the power converter 200 will start after 1h, 1.5h or 2h. The average temperature of the battery 100 being greater than or equal to the ambient temperature threshold indicates that the base temperature of the battery 100 is on the high side, which is not conducive to the natural cooling of the battery 100. The temperature of the heat exchange medium in the heat accumulator 730 is within the range from T2 - ΔT1 to Tc - ΔT1, and the heat accumulator 730 still has a small amount of remaining heat storage capacity, but the remaining capacity is insufficient to completely accommodate all the heat generated by the battery 100 and the power converter 200. In this case, the thermal management system 700 enters the first heat dissipation working mode, part of the heat generated by the battery 100 and the power converter 200 is stored in the heat accumulator 730, and the other part of the heat is dissipated to the external environment through the radiator 720.

[0041] Second, as shown in Figure 17 , the thermal management system 700 has a second heat dissipation working mode, and in the second heat dissipation working mode, the flow path of the radiator 720 and the heat accumulator 730 are in communication with each other.

[0042] When it is determined that Tc≥T2 and Tm≥Tc-ΔT1, the thermal management system 700 enters the second heat dissipation operation mode. The average temperature of the battery 100 is not lower than the ambient temperature threshold, the relatively high ambient temperature is not conducive to the natural heat dissipation of the battery 100 and the power converter 200, and the temperature of the heat exchange medium inside the heat accumulator 730 is not lower than Tc ΔT, which indicates that the temperature of the heat exchange medium in the heat accumulator 730 is relatively high. At this time, the heat of the heat exchange medium in the heat accumulator 730 is dissipated to the outside through the radiator 720, so as to reduce the temperature of the heat exchange medium. When the temperature of the heat exchange medium inside the heat accumulator 730 decreases, the thermal management system 700 can selectively switch from the second heat dissipation operation mode to the first heat dissipation operation mode according to the temperature of the battery 100 and the temperature of the heat exchange medium in the heat accumulator 730.

[0043] Third, as shown in Figure 18 in the figure, the thermal management system 700 has a heat storage operation mode, in which the communication pipeline 770 and the heat accumulator 730 are in communication with each other.

[0044] The thermal management system 700 enters the heat storage operation mode under at least one of the following conditions: First, when it is determined that the battery 100 and the power converter 200 are in an operating state, T2≤Tc<T3, and Tm<Tc-ΔT1, the thermal management system 700 enters the heat storage operation mode.

[0045] Under this condition, the temperature of the heat exchange medium inside the heat accumulator 730 is relatively low, which can fully absorb the waste heat generated by the operation of the battery 100 and the power converter 200, and the radiator 720 does not need to participate in heat dissipation. The heat accumulator 730 can store the waste heat generated during the operation of the battery 100 and the power converter 200, and the stored waste heat can be used subsequently, which is beneficial to improving the heat utilization rate and reducing energy loss.

[0046] Second, when it is determined that the battery 100 and the power converter 200 are about to be in an operating state, Tc≥T2, and Tm<T2-ΔT1, the thermal management system 700 enters the heat storage operation mode.

[0047] Under this condition, the average temperature of the battery 100 is not lower than the ambient temperature threshold, the temperature of the heat exchange medium inside the heat accumulator 730 is lower than the ambient reference temperature, and the heat storage margin of the heat accumulator 730 is sufficient. Before the battery 100 and the power converter 200 are in the operating state, the waste heat generated during the operation of the battery 100 and the power converter 200 is stored, and the stored waste heat can be used subsequently, which is beneficial to improving the heat utilization rate and reducing energy loss.

[0048] Fourth, as shown in Figure 19As shown, the thermal management system 700 has a uniform temperature operating mode. In the uniform temperature operating mode, the first port and the second port of the connecting pipe 770 are connected.

[0049] When Tmax-Tmin>ΔT2 is determined, and the thermal management system 700 has not entered other operating modes, the thermal management system 700 enters the uniform temperature operating mode, where ΔT2 is the second temperature difference threshold.

[0050] The second temperature difference threshold ΔT2 can be 2℃, 3℃, or 5℃. When the temperature difference between multiple batteries 100 is too large, the heat exchange medium in the connecting pipe 770 flows to reduce the temperature difference between different batteries 100.

[0051] In related technologies, some energy storage systems use self-cooling or air-cooling methods for heat dissipation in their thermal management systems, but the heat exchange efficiency is low and the energy efficiency is low. Some energy storage systems use liquid cooling methods for heat dissipation in their thermal management systems, but the economic efficiency is low. Some solutions place the battery, power converter and thermal management system in separate areas, which can adapt to various installation scenarios, but the pipeline of the thermal management system needs to be set up to be long, the fluid flow resistance is large, the heat exchange efficiency is poor, resulting in poor economic efficiency of the thermal management system.

[0052] In this embodiment, by circulating the heat exchange medium in conjunction with the heat storage device 730 and the heat exchanger, the heat accumulated in the battery 100 and the power converter 200 can be quickly removed compared to self-cooling or air-cooling methods, thereby improving the heat dissipation efficiency of the battery 100 and the power converter 200 and enhancing the temperature control effect of the battery 100 and the power converter 200.

[0053] The thermal management system 700's heat storage mode can collect the heat generated by the battery 100 and the power converter 200 into the heat storage unit 730. The stored waste heat can be released and utilized in a low-temperature environment, and the excess heat that would otherwise be directly lost to the external environment can be retained for later use, thereby improving the thermal energy utilization efficiency of the thermal management system 700 and helping to improve the economic efficiency of the energy storage system 10.

[0054] Multiple batteries 100 are stacked vertically, with the power converter 200 mounted on top of the batteries 100. This facilitates the arrangement of the connecting pipes 770, reduces fluid resistance caused by long-distance laying of the connecting pipes 770, and helps improve overall heat exchange efficiency. Simultaneously, this design reduces the length of the high-voltage cables between the batteries 100 and the power converter 200, decreasing cable space occupation and power transmission losses, and reducing the risk of electromagnetic interference from high-voltage lines. Furthermore, the vertical stacking arrangement fully utilizes the vertical installation space of the equipment, reducing the overall horizontal footprint and improving the overall spatial integration of the unit.

[0055] According to the energy storage system 10 provided in the embodiments of this application, by switching the working mode based on the temperature of the battery 100 and the temperature of the heat exchange medium in the heat storage 730, the heat dissipation efficiency can be improved, the temperature control effect of the battery 100 and the power converter 200 can be improved, the waste heat of the equipment can be recovered, the heat dissipation power consumption can be reduced, and the energy efficiency and economy of the energy storage system 10 can be improved. By setting the battery 100, the power converter 200 and the thermal management system 700 close to each other, the fluid resistance caused by the long-distance laying of the connecting pipe 770 can be reduced, which helps to improve the overall heat exchange efficiency.

[0056] In some embodiments, such as Figure 7 and Figure 8 As shown, the energy storage system 10 includes a heat insulation component 260, with the battery 100 and power converter 200 located on both sides of the heat insulation component 260.

[0057] In this embodiment, the thermal insulation component 260 is a component with a low thermal conductivity coefficient. The thermal insulation component 260 can be made of aerogel material or foamed insulation material.

[0058] The heat insulation component 260 can reduce the flow of heat generated in the battery 100 side area into the power converter 200 side area, and can also reduce the flow of heat generated in the power converter 200 side area into the battery 100 side area. This is beneficial for separately controlling the heat exchange environment of the two heat sources, the battery 100 and the power converter 200, and helps to optimize the temperature control effect of the two types of components.

[0059] In some embodiments, such as Figures 7-9 As shown, the energy storage system 10 includes a first heat exchange plate 181 and a second heat exchange plate 251. A connecting pipe 770 exchanges heat with the battery 100 through the first heat exchange plate 181, and the first heat exchange plate 181 and the battery 100 are located on the first side of the heat insulation member 260. The connecting pipe 770 exchanges heat with the power converter 200 through the second heat exchange plate 251, and the second heat exchange plate 251 and the power converter 200 are located on the second side of the heat insulation member 260.

[0060] In this embodiment, the first heat exchange plate 181 is a plate-type heat-conducting component that can be used for heat conduction and heat exchange. The first heat exchange plate 181 can be attached to the outer wall of the battery cell 110 by the first thermally conductive adhesive 182, which is beneficial to improving the heat conduction efficiency between the heat exchange medium and the battery cell 110.

[0061] The second heat exchange plate 251 is a plate-type heat-conducting component that can be used for heat conduction and heat exchange. The second heat exchange plate 251 can be attached to the outer wall of the power converter body 210 by the second thermally conductive adhesive 252, which is beneficial for receiving the heat generated by the power converter body 210 during operation and transferring it to the heat exchange medium.

[0062] The heat insulation component 260 can reduce the flow of heat generated in the second side area into the first side area and reduce the flow of heat generated in the first side area into the second side area. This is beneficial for separately controlling the heat exchange environment of the two heat sources, the battery 100 and the power converter 200, and helps optimize the temperature control effect of the two types of components.

[0063] In some embodiments, such as Figure 1 , Figures 16-19 as well as Figures 21-24 As shown, the thermal management system 700 may include: a drive pump 710, which is interconnected with a connecting pipe 770, a heat accumulator 730 and a radiator 720.

[0064] In this embodiment, the drive pump 710 is a fluid transport device that relies on mechanical driving force to drive the heat exchange medium to circulate inside the pipeline.

[0065] The drive pump 710, radiator 720, and heat storage unit 730 can be integrated. The drive pump 710 and radiator 720 can be installed on the outside of the heat storage housing 731 by welding, bonding, or snap-fitting to reduce the length of the piping.

[0066] In some embodiments, such as Figure 1 , Figure 10 , Figure 11 as well as Figures 16-19 As shown, the thermal management system 700 may include: a valve group 760, wherein the first to sixth valve ports of the valve group 760 are selectively connected, the first valve port 761 of the valve group 760 is connected to the first port of the connecting pipe 770, the second valve port 762 of the valve group 760 is connected to the second port of the connecting pipe 770, the third valve port 763 of the valve group 760 is connected to the inlet of the heat accumulator 730, the fourth valve port 764 of the valve group 760 is connected to the flow path inlet of the radiator 720, the fifth valve port 765 of the valve group 760 is connected to the outlet of the drive pump 710, and the sixth valve port 766 of the valve group 760 is connected to the inlet of the drive pump 710.

[0067] In this embodiment, the valve assembly 760 has six valve ports, and the six valve ports can be selectively connected in part or in all directions to adapt to the flow path switching requirements of different operating modes of the thermal management system 700. Each of the six valve ports of the valve assembly 760 can be fitted with a sealing gasket or fastening joint to achieve a sealed assembly, which can improve the fit of the pipeline connection and help reduce the probability of heat exchange medium leakage.

[0068] The first valve port 761 of the valve assembly 760 can be directly connected to the first port of the connecting pipe 770, and the second valve port 762 of the valve assembly 760 can be directly connected to the second port of the connecting pipe 770.

[0069] The third valve port 763 of the valve group 760 may be connected to the inlet of the heat accumulator 730 through the heat accumulator liquid inlet pipe 783, which can switch the state of the heat accumulator 730 being connected to or disconnected from the circulation flow path according to the actual working mode, and can adapt to different working requirements of the thermal management system 700 for heat storage and heat dissipation.

[0070] The fourth valve port 764 of the valve group 760 may be connected to the flow path inlet of the radiator 720 through the radiator liquid inlet pipe 784, which can realize the on-off switching between the flow path of the radiator 720 and the circulation loop, and is beneficial to adapting to different heat dissipation requirements of the battery 100 and the power converter 200.

[0071] The fifth valve port 765 of the valve group 760 may be connected to the outlet of the drive pump 710 through the first valve group connecting pipe 785, and the sixth valve port 766 of the valve group 760 may be connected to the inlet of the drive pump 710 through the second valve group connecting pipe 786.

[0072] In some embodiments, such as Figure 16 shown in the figure, the thermal management system 700 has a first heat dissipation working mode, and in the first heat dissipation working mode, the drive pump 710, the communication pipeline 770, the flow path of the radiator 720 and the heat accumulator 730 are sequentially communicated end to end.

[0073] In this embodiment, the thermal management system 700 enters the first heat dissipation working mode under at least one of the following conditions: First, when it is determined that the battery 100 and the power converter 200 are in an operating state, and Tc≥T3, Tm<Tc-ΔT1, the thermal management system 700 enters the first heat dissipation working mode, where T3 is a high temperature threshold, and ΔT1 is a first temperature difference threshold.

[0074] Second, when it is determined that the battery 100 and the power converter 200 are about to be in an operating state, and Tc≥T2, T2-ΔT1≤Tm<Tc-ΔT1, the thermal management system 700 enters the first heat dissipation working mode, where T2 is an ambient temperature threshold.

[0075] In the first heat dissipation working mode, the outlet of the drive pump 710 is communicated with the first port of the communication pipeline 770, the second port of the communication pipeline 770 is communicated with the flow path inlet of the radiator 720, the flow path outlet of the radiator 720 is communicated with the inlet of the heat accumulator 730, and the outlet of the heat accumulator 730 is communicated with the inlet of the drive pump 710.

[0076] Driven by the drive pump 710, the heat exchange medium flows from the heat accumulator 730 to the communication pipeline 770, the heat exchange medium in the communication pipeline 770 absorbs heat from the battery 100 and the power converter 200, the heat exchange medium that has absorbed the heat flows to the radiator 720 and dissipates the heat, and the heat exchange medium that has dissipated the heat flows into the heat accumulator 730 to complete the flow path circulation.

[0077] In some embodiments, as Figure 17 shown in the figure, the thermal management system 700 has a second heat dissipation operation mode. In the second heat dissipation operation mode, the flow paths of the drive pump 710, the radiator 720 and the heat accumulator 730 are sequentially communicated end to end.

[0078] In this embodiment, when it is determined that Tc≥T2 and Tm≥Tc-ΔT1, the thermal management system 700 enters the second heat dissipation operation mode.

[0079] In the second heat dissipation operation mode, the outlet of the drive pump 710 is communicated with the flow path inlet of the radiator 720, the flow path outlet of the radiator 720 is communicated with the inlet of the heat accumulator 730, the outlet of the heat accumulator 730 is communicated with the inlet of the drive pump 710, and the communication pipeline 770 is disconnected from the circulation loop.

[0080] Driven by the drive pump 710, the heat exchange medium flows from the heat accumulator 730 to the flow path of the radiator 720 and dissipates heat to the outside, and the cooled heat exchange medium flows back into the heat accumulator 730 to complete the flow path circulation.

[0081] In some embodiments, as Figure 18 shown in the figure, the thermal management system 700 has a heat storage operation mode. In the heat storage operation mode, the drive pump 710, the communication pipeline 770 and the heat accumulator 730 are sequentially communicated end to end.

[0082] The thermal management system 700 enters the heat storage operation mode under at least one of the following conditions: First, when it is determined that the battery 100 and the power converter 200 are in the operating state, T2≤Tc<T3, and Tm<Tc-ΔT1, the thermal management system 700 enters the heat storage operation mode.

[0083] Second, when it is determined that the battery 100 and the power converter 200 are about to be in the operating state, Tc≥T2, and Tm<T2-ΔT1, the thermal management system 700 enters the heat storage operation mode.

[0084] In the heat storage operation mode, the outlet of the drive pump 710 is communicated with the first port of the communication pipeline 770, the second port of the communication pipeline 770 is communicated with the inlet of the heat accumulator 730, the outlet of the heat accumulator 730 is communicated with the inlet of the drive pump 710, and the flow path of the radiator 720 is disconnected from the circulation loop.

[0085] Driven by the drive pump 710, the heat exchange medium flows from the heat accumulator 730 into the communication pipeline 770, the heat exchange medium in the communication pipeline 770 absorbs the heat generated by the battery 100 and the power converter 200, and the heat exchange medium carrying heat flows into the heat accumulator 730 to complete the loop circulation.

[0086] In some embodiments, as Figure 19 As shown, the thermal management system 700 has a uniform temperature operating mode. In the uniform temperature operating mode, the drive pump 710 and the connecting pipe 770 are connected end to end in sequence.

[0087] In this embodiment, when it is determined that Tmax-Tmin>ΔT2, and the thermal management system 700 has not entered other working modes, the thermal management system 700 enters the uniform temperature working mode, where ΔT2 is the second temperature difference threshold.

[0088] In the uniform temperature operating mode, the outlet of the drive pump 710 is connected to the second port of the connecting pipe 770, the first port of the connecting pipe 770 is connected to the inlet of the drive pump 710, and the flow path of the radiator 720 and the heat accumulator 730 are disconnected from the circulation loop.

[0089] The heat exchange medium flows in the connecting pipe 770 under the drive of the drive pump 710 to reduce the temperature difference between different batteries 100.

[0090] In some embodiments, such as Figure 11 and Figure 20 As shown, the heat accumulator 730 is equipped with a heater 733, and the outlet of the heat accumulator 730 can be selectively connected to the water supply port 740.

[0091] In this embodiment, the heater 733 is a device that converts electrical energy or other energy sources into heat energy. When the heater 733 operates, it raises the temperature of the heat exchange medium stored inside the heat accumulator 730. The heater 733 can be an immersion heating structure or a wall-mounted heating structure. The connection between the heater 733 and the heat accumulator 730 can be a threaded connection, flange fixing, or snap-locking.

[0092] The water supply port 740 is an external interface that allows the heated heat exchange medium inside the heat accumulator 730 to be discharged. The heat exchange medium stored in the heat accumulator 730 is water. A solenoid valve or manual valve can be installed between the outlet of the heat accumulator 730 and the water supply port 740. The water supply port 740 can be connected to heating pipes or other water pipes, providing hot water for residential, commercial, and industrial applications. The heat exchange medium storing waste heat inside the heat accumulator 730 can be transported to the water supply port 740 and output as heat energy, facilitating the resource utilization of recovered waste heat and helping to improve the overall heat utilization rate of the thermal management system 700.

[0093] According to different usage scenarios of users, parameter thresholds such as the basic water temperature and maximum water temperature of the heat accumulator 730 can be adjusted. For example, when the user supplies hot water to public washrooms, scientific research or daily kitchen and bathroom cleaning, the heat storage water temperature can be set between 15°C and 40°C; when the user needs hot water for bathing, the heat storage water temperature can be set between 35°C and 45°C. When the temperature of the heat exchange medium stored in the heat accumulator 730 is lower than the user demand temperature, the heater 733 can be used to assist in heating the heat exchange medium stored in the heat accumulator 730. The heater 733 can be installed in the heat storage bin 735, or the heater 733 can be installed near the outlet of the heat accumulator 730, so as to heat the water flowing from the outlet of the heat accumulator 730 to the water supply port 740.

[0094] As Figure 18 shown, the thermal management system 700 may have a first heating operation mode. In the first heating operation mode, the drive pump 710, the communication pipeline 770 and the heat accumulator 730 are sequentially communicated end to end, and the heater 733 is turned on.

[0095] When it is determined that the battery 100 and the power converter 200 are about to be in an operating state, and Tc<T1, Tm≤Tc+ΔT1, the thermal management system 700 enters the first heating operation mode, where T1 is the low temperature threshold.

[0096] In this case, when the heat exchange medium is deionized water, the low temperature threshold T1 may satisfy: 0°C≤T1≤10°C, for example, T1 may be 0°C, 5°C or 10°C, and the temperature of the heat exchange medium in the heat accumulator 730 is not lower than the low temperature threshold T1, so as to reduce the probability of the heat exchange medium phase-changing into a solid state. The average temperature of the battery 100 cannot reach the temperature required for the normal startup of the battery 100, and the temperature of the heat exchange medium in the heat accumulator 730 is not high enough to provide heat for the battery 100. In this case, the heater 733 is turned on before the battery 100 operates, and the heat carried by the heat exchange medium is used to preheat the battery 100 and the power converter 200, which is beneficial to reducing the energy consumption loss of the equipment itself during the low-temperature startup process.

[0097] In the first heating operation mode, the outlet of the drive pump 710 communicates with the first port of the communication pipeline 770, the second port of the communication pipeline 770 communicates with the inlet of the heat accumulator 730, the outlet of the heat accumulator 730 communicates with the inlet of the drive pump 710, the heater 733 is turned on, and the flow path of the radiator 720 is disconnected from the circulation loop.

[0098] The heat exchange medium in the heat accumulator 730 absorbs the heat released by the heater 733 and the temperature rises. Driven by the drive pump 710, the heat exchange medium flows from the heat accumulator 730 into the communication pipeline 770. After the heat exchange medium in the communication pipeline 770 provides heat for the battery 100 and the power converter 200, it flows back into the heat accumulator 730, completing the loop cycle.

[0099] The thermal management system 700 may have a second heating operation mode, in which the heater 733 is turned on.

[0100] The thermal management system 700 enters the second heating operation mode under at least one of the following conditions: First, when it is determined that no heat exchange medium flows through the inlet and the outlet of the heat storage bin 735, and Tm<T1, the thermal management system 700 enters the second heating operation mode.

[0101] In this case, the temperature of the heat exchange medium inside the heat accumulator 730 is relatively low, and the heat exchange medium may undergo phase change to a solid state. The heater 733 heats the medium inside the heat accumulator 730 to supplement heat, and the heated heat exchange medium can remain inside the heat accumulator 730 to store thermal energy, which is beneficial to maintaining the original liquid flow property of the heat exchange medium and helps maintain the subsequent heat storage and outward heat supply capabilities of the heat accumulator 730. After the thermal management system 700 enters the second heating operation mode, when it is determined that Tm>T1+ΔT1, the thermal management system 700 can exit the second heating operation mode.

[0102] Second, when it is determined that no heat exchange medium flows through the inlet and the outlet of the heat storage bin 735, the user-set required heating temperature is T4, and Tm<T4, the thermal management system 700 enters the second heating operation mode.

[0103] In this case, the required heating temperature T4 can be specified by the user, and T4 can satisfy: 15°C≤T4≤60°C, for example, T4 can be 15°C, 30°C, 40°C, 50°C or 60°C. The heater 733 heats the heat exchange medium stored in the heat accumulator 730, so that the temperature of the heat exchange medium stored in the heat accumulator 730 meets the user's demand. Certainly, when Tm≥T4, there is no need to turn on the heater 733, and the water temperature in the heat accumulator 730 is sufficient to meet the user's demand.

[0104] When T4>T3 and the heating demand specified by the user conflicts with the heat dissipation mode demand, the thermal management system 700 suspends entering the second heating operation mode, and enters the second heating operation mode according to the user's demand after the heat dissipation mode ends.

[0105] The thermal management system 700 may have a third heating operation mode, in which the drive pump 710, the communication pipeline 770 and the heat accumulator 730 are communicated sequentially end to end.

[0106] When it is determined that the battery 100 and the power converter 200 are about to be in an operating state, Tc<T1, and Tm>Tc+ΔT1, the thermal management system 700 enters the third heating operation mode.

[0107] In this case, the average temperature of battery 100 does not reach the temperature required for normal start-up of battery 100. The temperature of the heat exchange medium in the heat storage tank 730 is high enough to provide heat to battery 100. In this case, the heat carried by the heat exchange medium is used to preheat battery 100 and power converter 200 before battery 100 is put into operation, which helps to reduce the energy consumption of the equipment itself during low temperature start-up. At this time, heater 733 does not need to be turned on, which helps to reduce the energy consumption of thermal management system 700.

[0108] In the third heating mode, the outlet of the drive pump 710 is connected to the first port of the connecting pipe 770, the second port of the connecting pipe 770 is connected to the inlet of the heat accumulator 730, the outlet of the heat accumulator 730 is connected to the inlet of the drive pump 710, and the flow path of the radiator 720 is disconnected from the circulation loop.

[0109] Driven by the drive pump 710, the heat exchange medium flows from the accumulator 730 into the connecting pipe 770. After providing heat to the battery 100 and the power converter 200, the heat exchange medium in the connecting pipe 770 flows into the accumulator 730, completing the loop circulation.

[0110] In some embodiments, such as Figures 4-7 as well as Figure 15 As shown, the battery 100 may include: a first housing 150, a single cell 110, and a first heat insulation pad 170. The first housing 150 is equipped with a plurality of single cells 110, and the first heat insulation pad 170 is provided between the single cell 110 and the first housing 150.

[0111] In this embodiment, the first housing 150 is a housing structure used to accommodate and limit the battery cell 110. The first housing 150 can be made of aluminum alloy sheet or engineering plastic.

[0112] The battery cell 110 is an energy storage unit component capable of converting electrical energy into chemical energy. The battery cell 110 can be a square aluminum-cased cell or a pouch cell. A cover plate 120 can be provided on the top of the multiple battery cells 110 installed within the first housing 150. The cover plate 120 can be made of insulating plastic or epoxy board and can have pre-reserved clearance holes for the busbar 130 to pass through, which helps to organize the wiring space at the top of the battery cell 110 and reduces the probability of external foreign objects touching the terminals. The busbar 130 is a metal current-conducting component with excellent conductivity. The busbar 130 passes through the opening in the cover plate 120 and electrically connects with the terminals of the battery cell 110. The busbar 130 enables series or parallel conduction between multiple battery cells 110, which is beneficial for the stable transmission of electrical energy output from the battery cell 110 and helps optimize the conductivity of the battery 100 circuit. During operation, both the individual battery cells 110 and the busbar 130 generate heat. End plates 140 can be arranged at both ends along the arrangement direction of the multiple individual battery cells 110 within the first housing 150, and the end plates 140 can apply a pre-tightening force to the multiple individual battery cells 110.

[0113] A thermal insulation adhesive 160 can be provided between two adjacent battery cells 110. The thermal insulation adhesive 160 is an elastic adhesive filler material with a low thermal conductivity coefficient. The thermal insulation adhesive 160 is filled between two adjacent battery cells 110. The thermal insulation adhesive 160 can be an organosilicon thermal insulation adhesive 160 body or a foamed thermal insulation adhesive 160 body. After the adhesive is formed, it can adhere to the outer wall surface of the battery cell 110, which helps to block heat conduction between adjacent battery cells 110 and reduce the probability of thermal runaway of multiple battery cells 110.

[0114] The first heat insulation pad 170 is a heat insulation material, which can be heat insulation cotton, aerogel material or fiberglass heat insulation material. The first heat insulation pad 170 is placed in the gap between the outer surface of the battery cell 110 and the inner wall of the first housing 150. The first heat insulation pad 170 separates the battery cell 110 and the first housing 150 by its own heat insulation properties, which helps to reduce the heat exchange between the battery cell 110 and the first housing 150, reduce the heat loss caused by the heat generated by the battery cell 110 being transferred to the outside, and help the heat exchange medium absorb the heat energy generated by the battery cell 110 and store it in the heat accumulator 730.

[0115] In some embodiments, such as Figure 7 and Figure 8 as well as Figure 15 As shown, the power converter 200 may include: a second housing 230, a power converter body 210, and a second heat insulation pad 240. The power converter body 210 is mounted on the second housing 230, and the second heat insulation pad 240 is provided between the power converter body 210 and the second housing 230.

[0116] In this embodiment, the second housing 230 is a housing structure used to house and protect the power converter body 210. The second housing 230 can be made of die-cast aluminum alloy or flame-retardant engineering plastic. The outer wall of the second housing 230 can have pre-drilled openings for connecting the conduit 770 and the busbar 220 to pass through. The busbar 220 can be used to conduct current between the power converter body 210 and the individual battery cells 110.

[0117] The power converter body 210 is an electrical functional component that uses power electronic devices to convert electrical energy voltage or frequency. The power converter body 210 can be installed in the inner cavity of the second housing 230 by means of threaded connection or snap-fit ​​assembly. The power converter body 210 will continuously generate heat loss during operation.

[0118] The second heat insulation pad 240 is a heat insulation material, which can be heat insulation cotton, aerogel material, or fiberglass heat insulation material. The second heat insulation pad 240 is arranged in the gap between the outer wall of the power converter body 210 and the inner wall of the second housing 230. The second heat insulation pad 240 can separate the power converter body 210 and the second housing 230, which helps to reduce the heat transfer between the power converter body 210 and the second housing 230, reduce the heat loss caused by the heat generated by the power converter body 210 being transferred to the outside, and facilitate the heat exchange medium to absorb the heat energy generated by the power converter body 210 and store it in the heat accumulator 730.

[0119] In some embodiments, the connecting conduit 770 may be one of the following forms: Firstly, such as Figures 7-9 as well as Figure 15 As shown, the connecting pipe 770 may include a main heat exchange pipe 771 and a branch heat exchange pipe 772. The main heat exchange pipe 771 is interconnected with the flow path of the radiator 720 and the heat storage device 730. The inlet and outlet of the branch heat exchange pipe 772 are both connected to the main heat exchange pipe 771. The branch heat exchange pipe 772 is used for heat exchange with the battery 100 and the power converter 200.

[0120] In this embodiment, the main heat exchange tube 771 may include a pair, and the pair of main heat exchange tubes 771 may be provided with a first port and a second port respectively. The pair of main heat exchange tubes 771 may be connected to the first valve port 761 and the second valve port 762 of the valve group 760 through the first port and the second port respectively.

[0121] Multiple heat exchange tubes 772 may be included, each corresponding to a multiple battery 100. The inlet and outlet of each heat exchange tube 772 can be connected to a pair of main heat exchange tubes 771. Each heat exchange tube 772 may include a first section 7721 and a second section 7722. The first section 7721 is a section on the heat exchange tube 772 that cooperates with the first heat exchange plate 181 for heat exchange. The heat exchange medium flowing inside the first section 7721 exchanges heat with the battery 100 through the first heat exchange plate 181, which is beneficial for real-time heat removal or replenishment of the battery 100. The second section 7722 is a section on the heat exchange tube 772 that cooperates with the second heat exchange plate 251 for heat exchange. The heat exchange medium inside the second section 7722 exchanges heat with the power converter 200 through the second heat exchange plate 251. A single heat exchange tube 772 can regulate the temperature of the battery 100 and the power converter 200 through the first section 7721 and the second section 7722. The first segment 7721 can be the inlet segment of the heat exchanger 772, and the second segment 7722 can be the outlet segment of the heat exchanger 772. This allows the heat exchange medium to first exchange heat with the battery 100 and then with the power converter 200, which improves the temperature control of the battery 100. Alternatively, the first segment 7721 can also be the outlet segment of the heat exchanger 772, and the second segment 7722 can be the inlet segment.

[0122] In the case where the energy storage system 10 includes a heat insulation element 260, the first section 7721, the first heat exchange plate 181, and the battery 100 are located on the first side of the heat insulation element 260, and the second section 7722, the second heat exchange plate 251, and the power converter 200 are located on the second side of the heat insulation element 260. With the first section 7721, the first heat exchange plate 181, and the battery 100 located on the first side of the heat insulation element 260, the heat generated by the operation of the battery 100 can be transferred via the first heat exchange plate 181 to the heat exchange medium flowing inside the first section 7721. The heat insulation element 260 can constrain the heat diffusion in this area to the second side of the heat insulation element 260. The second section 7722, the second heat exchange plate 251, and the power converter 200 are arranged on the second side of the heat insulation component 260. The heat generated by the power converter 200 is transferred to the heat exchange medium inside the second section 7722 by the second heat exchange plate 251. The heat insulation component 260 can reduce the flow of heat generated in the second side area into the first side area, which is conducive to separately controlling the heat exchange environment of the two heat sources, the battery 100 and the power converter 200, and helps to optimize the temperature control effect of the two types of components.

[0123] Secondly, such as Figure 21 As shown, the connecting pipe 770 includes a pair connected in series, and the pair of connecting pipes 770 are used for heat exchange with the battery 100 and the power converter 200, respectively.

[0124] In this embodiment, the battery 100 and the power converter 200 have independent but connected pipes 770. The heat exchange medium, driven by the pump 710, first flows through the connected pipe 770 corresponding to the battery 100 for heat exchange, and then flows through the connected pipe 770 corresponding to the power converter 200 for heat exchange. The heat accumulator 730 is equipped with a heater 733. The flow path of the radiator 720 can be selectively connected between the connected pipes 770 and the heat accumulator 730 according to the actual working mode requirements. Based on the temperature control characteristics of the battery 100, the temperature range of the heat exchange medium corresponding to the full-load heat storage condition of the heat accumulator 730 can be set between 35°C and 45°C.

[0125] Thirdly, such as Figure 22 As shown, one side of the connecting pipe 770 is used for heat exchange with the battery 100, and the other side of the heat exchange pipe is used for heat exchange with the power converter 200.

[0126] In this embodiment, the battery 100 and the power converter 200 are respectively arranged on both sides of the connecting pipe 770. The heat exchange medium can exchange heat with the battery 100 and the power converter 200 synchronously through the connecting pipe 770 under the drive of the drive pump 710. The heat accumulator 730 is equipped with a heater 733. The flow path of the radiator 720 can be selectively connected between the connecting pipe 770 and the heat accumulator 730 according to the actual working mode requirements. Based on the temperature control characteristics of the battery 100, the temperature range of the heat exchange medium corresponding to the full-load heat storage condition of the heat accumulator 730 can be set between 35°C and 45°C.

[0127] Fourth, such as Figure 23 As shown, the heat storage device 730 and the connecting pipe 770 each include a pair. The pair of connecting pipes 770 are used for heat exchange with the battery 100 and the power converter 200, respectively. The heat storage device 730 and the connecting pipe 770 correspond one-to-one. Each connecting pipe 770 can be selectively connected to the corresponding heat storage device 730. Both pairs of connecting pipes 770 can be selectively connected to the radiator 720.

[0128] In this embodiment, the battery 100 and the power converter 200 each have independent connecting pipes 770, and the corresponding connecting pipes 770 of the battery 100 and the power converter 200 can be connected to their respective heat storage devices 730. The heat storage device 730 corresponding to the battery 100 can be equipped with a heater 733. The flow path of the radiator 720 can be selectively connected between the connecting pipe 770 corresponding to the battery 100 and the heat storage device 730 corresponding to the battery 100, or between the connecting pipe 770 corresponding to the power converter 200 and the heat storage device 730 corresponding to the power converter 200, depending on the actual operating mode requirements. Based on the temperature control characteristics of the battery 100, the temperature range of the heat exchange medium corresponding to the full-load heat storage condition of the heat storage device 730 corresponding to the battery 100 can be set between 35°C and 45°C. Based on the temperature control characteristics of the power converter 200, the temperature range of the heat exchange medium corresponding to the full-load heat storage condition of the heat storage device 730 corresponding to the power converter 200 can be set between 40°C and 70°C.

[0129] Fifth, such as Figure 24 As shown, both the heat storage device 730 and the connecting pipe 770 include a pair. The pair of connecting pipes 770 are used for heat exchange with the battery 100 and the power converter 200, respectively. The heat storage device 730 and the connecting pipe 770 correspond one-to-one. The connecting pipe 770 used for heat exchange with the battery 100 can be selectively connected to the radiator 720, while the connecting pipe 770 used for heat exchange with the power converter 200 is not connected to the radiator 720.

[0130] In this embodiment, the battery 100 and the power converter 200 each have independent connecting pipes 770, and the corresponding connecting pipes 770 of the battery 100 and the power converter 200 can be connected to their respective heat storage devices 730. The heat storage device 730 corresponding to the battery 100 can be equipped with a heater 733. The flow path of the radiator 720 can be selectively connected between the connecting pipe 770 corresponding to the battery 100 and the heat storage device 730 corresponding to the battery 100, but not between the connecting pipe 770 corresponding to the power converter 200 and the heat storage device 730 corresponding to the power converter 200, according to the actual operating mode requirements. Based on the temperature control characteristics of the battery 100, the temperature range of the heat exchange medium corresponding to the full-load heat storage condition of the heat storage device 730 corresponding to the battery 100 can be set between 35°C and 45°C. Based on the temperature control characteristics of the power converter 200, the temperature range of the heat exchange medium corresponding to the full-load heat storage condition of the heat storage device 730 corresponding to the power converter 200 can be set between 40°C and 70°C.

[0131] In some embodiments, the heat sink 720 may be one of the following forms: Firstly, such as Figure 12As shown, the radiator 720 may include: a third housing 7211, a partition 7212 and a plurality of heat dissipation teeth 7213. The partition 7212 is installed inside the housing of the radiator 720. The housing of the radiator 720 and the partition 7212 together form the flow path of the radiator 720. The plurality of heat dissipation teeth 7213 are installed in the housing.

[0132] In this embodiment, the third housing 7211 is a housing structure for mounting the baffle 7212 and the heat dissipation fins 7213. The third housing 7211 can be bonded or welded to the heat accumulator 730. The baffle 7212 is fixedly assembled in the inner cavity of the third housing 7211, and the inner wall surface of the third housing 7211 and the plate surface of the baffle 7212 cooperate to form a flow path for the heat exchange medium to flow through the radiator 720. The baffle 7212 may include one or more. When there are multiple baffles 7212, the third housing 7211 and the multiple baffles 7212 can form a serpentine flow channel. The multiple heat dissipation fins 7213 are arranged on the outer wall of the third housing 7211, and the heat dissipation fins 7213 and the third housing 7211 can be assembled by integral die casting or bonding. The heat exchange medium flowing through the radiator 720 flows inside the flow channel formed by the third shell 7211 and the partition 7212. The heat carried by the heat exchange medium can be conducted through the shell of the third shell 7211 to the heat dissipation teeth 7213 arranged on the outside. The heat dissipation teeth 7213 dissipate heat by contacting the surrounding air. It is beneficial to expand the heat dissipation contact area by relying on the large area of ​​the heat dissipation teeth 7213, which helps to improve the heat dissipation and heat exchange efficiency of the radiator 720.

[0133] Secondly, such as Figure 13 As shown, the radiator 720 may include: an inlet pipe 7221, an outlet pipe 7222, and a plurality of heat sinks 7223. The outlet of the outlet pipe 7222 is connected to the inlet of the heat accumulator 730. The flow channels of the heat sinks 7223 are connected to the inlet pipe 7221 and the outlet pipe 7222. The inlet pipe 7221, the outlet pipe 7222, and the flow channels of the plurality of heat sinks 7223 together form the flow path of the radiator 720.

[0134] In this embodiment, both the inlet pipe 7221 and the outlet pipe 7222 are hollow pipes. The heat sink 7223 has internal cavity channels, and the channels of each heat sink 7223 are connected to the inlet pipe 7221 and the outlet pipe 7222. The inlet pipe 7221, the outlet pipe 7222, and the internal channels of each heat sink 7223 form the flow path of the radiator 720. In this embodiment, the high-temperature heat exchange medium is distributed into the internal channels of each heat sink 7223 via the inlet pipe 7221. Heat is exchanged and cooled by the heat sink 7223 and the outside air. The cooled heat exchange medium is collected and flows into the outlet pipe 7222 and transported to the heat accumulator 730 as needed.

[0135] Thirdly, such as Figure 14As shown, the radiator 720 may include: a distributor 7231, a confluencer 7232, multiple heat dissipation pipes 7233 and multiple fins 7234. The outlet of the confluencer 7232 is connected to the inlet of the heat storage tank 730. The heat dissipation pipes 7233 are connected to the distributor 7231 and the confluencer 7232. The distributor 7231, the confluencer 7232 and the multiple heat dissipation pipes 7233 together form the flow path of the radiator 720. The fins 7234 are installed on the heat dissipation pipes 7233.

[0136] In this embodiment, each heat exchange tube 7233 is connected to a distributor 7231 and a collector 7232 at both ends, and fins 7234 are sleeved or attached to the outer wall of the heat exchange tube 7233. The high-temperature heat exchange medium flows into each heat exchange tube 7233 from the distributor 7231, and the heat from the tube wall of the heat exchange tube 7233 is conducted to the outer fins 7234 to achieve air cooling. The cooled heat exchange medium flows into the collector 7232, and the heat exchange medium can be sent to the heat storage tank 730 to retain heat.

[0137] In some embodiments, such as Figure 8 as well as Figures 25-28 As shown, the energy storage system 10 may include a first heat exchange plate 181, and the connecting pipe 770 exchanges heat with the individual cells 110 of the battery 100 through the first heat exchange plate 181.

[0138] In this embodiment, the first heat exchange plate 181 is a plate-type heat-conducting component that relies on the contact between the plate surfaces to complete heat conduction. The connecting pipe 770 realizes heat exchange with the battery cell 110 of the battery 100 through the first heat exchange plate 181. The heat exchange medium flowing inside the connecting pipe 770 can absorb the heat generated by the operation of the battery cell 110 or transfer heat to the battery cell 110 with the help of the first heat exchange plate 181, thus helping to regulate the operating temperature of the battery cell 110.

[0139] The battery cell 110 has a top surface and a bottom surface 1103 disposed opposite to each other, a pair of first side surfaces 1101 disposed opposite to each other, and a pair of second side surfaces 1102 disposed opposite to each other. The bottom surface 1103 is adjacent to both the first side surfaces 1101 and the second side surfaces 1102. The area of ​​the first side surface 1101 is less than or equal to the area of ​​the second side surface 1102.

[0140] The battery cell 110 and the first heat exchange plate 181 can be configured in one of the following ways: Firstly, such as Figure 25 and Figure 26 As shown, the first side 1101 of the battery cell 110 is fitted with the first heat exchange plate 181.

[0141] In this embodiment, the first heat exchange plate 181 can be simultaneously bonded to the first side surface 1101 of multiple battery cells 110 using the first thermally conductive adhesive 182. For example... Figure 25 As shown, one side of the first heat exchange plate 181 can mate with the first side surface 1101 of multiple battery cells 110; or, as... Figure 26 As shown, both sides of the first heat exchange plate 181 can be matched with the first side surface 1101 of multiple battery cells 110.

[0142] Since the area of ​​the first side 1101 is less than or equal to the area of ​​the second side 1102, when the area of ​​the first heat exchange plate 181 is the same, a single first heat exchange plate 181 can arrange and attach a larger number of battery cells 110, which can increase the overall arrangement density of battery cells 110. This is beneficial to expand the number of battery cells 110 arranged in the limited space of the first housing 150 and optimize the space utilization.

[0143] Secondly, such as Figure 27 As shown, the second side 1102 of the battery cell 110 is fitted with the first heat exchange plate 181.

[0144] In this embodiment, the first heat exchange plate 181 can be simultaneously bonded to the second side 1102 of multiple battery cells 110 using a first thermally conductive adhesive 182. For example... Figure 25 As shown, one side of the first heat exchange plate 181 can cooperate with the second side 1102 of the multiple battery cells 110; or, both sides of the first heat exchange plate 181 can cooperate with the second side 1102 of the multiple battery cells 110.

[0145] Since the area of ​​the second side 1102 is greater than or equal to the area of ​​the first side 1101, the effective heat exchange contact area of ​​the battery cell 110 can be increased, the heat conduction rate between the battery cell 110 and the first heat exchange plate 181 can be improved, which is conducive to accelerating the heat export or heat import efficiency of the battery cell 110.

[0146] Thirdly, such as Figure 28 As shown, the bottom surface 1103 of the battery cell 110 mates with the first heat exchange plate 181.

[0147] In this embodiment, the first heat exchange plate 181 can be simultaneously bonded to the bottom surfaces 1103 of multiple battery cells 110 using the first thermally conductive adhesive 182. The battery cells 110 are bonded to the surface of the first heat exchange plate 181 by lying flat on their bottoms. The weight of the battery cells 110 can help press them firmly against the first heat exchange plate 181, which can reduce the heat exchange resistance caused by assembly gaps. At the same time, it is convenient to uniformly arrange the busbars 130 and the cover plate 120 on the top surface of the battery cells 110.

[0148] The following is combined Figures 1-28 The energy storage system 10 of this application is described in an embodiment.

[0149] The energy storage system 10 includes: a battery 100, a power converter 200, a thermal management system 700, a heat insulation component 260, a first heat exchange plate 181, and a second heat exchange plate 251.

[0150] The battery 100 includes: a first housing 150, individual battery cells 110, heat-insulating adhesive 160, and a first heat-insulating pad 170. The first housing 150 has multiple individual battery cells 110 mounted on it. Heat-insulating adhesive 160 is provided between adjacent individual battery cells 110. The first heat-insulating pad 170 is provided between the individual battery cells 110 and the first housing 150.

[0151] The power converter 200 includes a second housing 230, a power converter body 210, and a second heat insulation pad 240. The power converter body 210 is mounted on the second housing 230. The second heat insulation pad 240 is provided between the power converter body 210 and the second housing 230.

[0152] The first heat exchange plate 181 and the battery 100 are located on the first side of the heat insulation component 260, and the second heat exchange plate 251 and the power converter 200 are located on the second side of the heat insulation component 260. The connecting pipe 770 exchanges heat with the battery 100 through the first heat exchange plate 181, and exchanges heat with the power converter 200 through the second heat exchange plate 251.

[0153] The thermal management system 700 includes a drive pump 710, connecting pipes 770, radiator 720, heat accumulator 730, and valve group 760.

[0154] The connecting pipe 770 can be selectively connected to the flow path of the drive pump 710 or the radiator 720 or the heat storage device 730. The connecting pipe 770 is used for heat exchange with the battery 100 and the power converter 200.

[0155] The radiator 720 is installed on the heat accumulator 730, and the flow path outlet of the radiator 720 is connected to the inlet of the heat accumulator 730.

[0156] The outlet of the heat accumulator 730 may be selectively connected to the inlet of the drive pump 710. The heat accumulator 730 is equipped with a heater 733. The outlet of the heat accumulator 730 may be selectively connected to a water supply port 740.

[0157] Valve assembly 760, the first to sixth valve ports of valve assembly 760 can be selectively connected, the first valve port 761 of valve assembly 760 is connected to the first port of connecting pipe 770, the second valve port 762 of valve assembly 760 is connected to the second port of connecting pipe 770, the third valve port 763 of valve assembly 760 is connected to the inlet of heat accumulator 730, the fourth valve port 764 of valve assembly 760 is connected to the flow path inlet of radiator 720, the fifth valve port 765 of valve assembly 760 is connected to the outlet of drive pump 710, and the sixth valve port 766 of valve assembly 760 is connected to the inlet of drive pump 710.

[0158] The connecting pipe 770 can be in one of the following forms: Firstly, such as Figures 7-9 as well as Figure 15 As shown, the connecting pipe 770 includes a main heat exchange pipe 771 and branch heat exchange pipes 772. The main heat exchange pipe 771 is interconnected with the flow paths of the heat storage device 730 and the radiator 720. The inlet and outlet of the branch heat exchange pipe 772 are both connected to the main heat exchange pipe 771. The branch heat exchange pipe 772 includes a first section 7721 and a second section 7722 connected together. The first section 7721 exchanges heat with the battery 100 through the first heat exchange plate 181, and the second section 7722 exchanges heat with the power converter 200 through the second heat exchange plate 251.

[0159] Secondly, such as Figure 21 As shown, the connecting pipe 770 includes a pair connected in series, and the pair of connecting pipes 770 are used for heat exchange with the battery 100 and the power converter 200, respectively.

[0160] Thirdly, such as Figure 22 As shown, one side of the connecting pipe 770 is used for heat exchange with the battery 100, and the other side of the heat exchange pipe is used for heat exchange with the power converter 200.

[0161] Fourth, such as Figure 23 As shown, the heat storage device 730 and the connecting pipe 770 each include a pair. The pair of connecting pipes 770 are used for heat exchange with the battery 100 and the power converter 200, respectively. The heat storage device 730 and the connecting pipe 770 correspond one-to-one. Each connecting pipe 770 can be selectively connected to the corresponding heat storage device 730. Both pairs of connecting pipes 770 can be selectively connected to the radiator 720.

[0162] Fifth, such as Figure 24 As shown, both the heat storage device 730 and the connecting pipe 770 include a pair. The pair of connecting pipes 770 are used for heat exchange with the battery 100 and the power converter 200, respectively. The heat storage device 730 and the connecting pipe 770 correspond one-to-one. The connecting pipe 770 used for heat exchange with the battery 100 can be selectively connected to the radiator 720, while the connecting pipe 770 used for heat exchange with the power converter 200 is not connected to the radiator 720.

[0163] The radiator 720 can be in one of the following forms: Firstly, such as Figure 12 As shown, the radiator 720 may include: a third housing 7211, a partition 7212 and a plurality of heat dissipation teeth 7213. The partition 7212 is installed inside the housing of the radiator 720. The housing of the radiator 720 and the partition 7212 together form the flow path of the radiator 720. The plurality of heat dissipation teeth 7213 are installed in the housing.

[0164] Secondly, such as Figure 13As shown, the radiator 720 may include a water inlet pipe 7221, a water outlet pipe 7222 and a plurality of heat dissipation fins 7223. The outlet of the water outlet pipe 7222 is communicated with the inlet of the heat accumulator 730. The flow channels of the heat dissipation fins 7223 are communicated with the water inlet pipe 7221 and the water outlet pipe 7222. The flow channels of the water inlet pipe 7221, the water outlet pipe 7222 and the plurality of heat dissipation fins 7223 jointly form the flow path of the radiator 720.

[0165] Third, as shown in Figure 14 the radiator 720 may include a flow divider 7231, a flow collector 7232, a plurality of heat dissipation pipes 7233 and a plurality of fins 7234. The outlet of the flow collector 7232 is communicated with the inlet of the heat accumulator 730. The heat dissipation pipes 7233 are communicated with the flow divider 7231 and the flow collector 7232. The flow divider 7231, the flow collector 7232 and the plurality of heat dissipation pipes 7233 jointly form the flow path of the radiator 720, and the fins 7234 are mounted on the heat dissipation pipes 7233.

[0166] The matching manner between the cell monomer 110 and the first heat exchange plate 181 may be one of the following: First, as shown in Figure 25 and Figure 26 the first side surface 1101 of the cell monomer 110 is matched with the first heat exchange plate 181.

[0167] Second, as shown in Figure 27 the second side surface 1102 of the cell monomer 110 is matched with the first heat exchange plate 181.

[0168] Third, as shown in Figure 28 the bottom surface 1103 of the cell monomer 110 is matched with the first heat exchange plate 181.

[0169] The thermal management system 700 may have at least one of the following operating modes: First, as shown in Figure 16 the thermal management system 700 has a first heat dissipation operating mode. In the first heat dissipation operating mode, the drive pump 710, the communication pipeline 770, the flow path of the radiator 720 and the heat accumulator 730 are communicated in sequence end to end.

[0170] The thermal management system 700 enters the first heat dissipation operating mode under at least one of the following conditions: First, when it is determined that the battery 100 and the power converter 200 are in the operating state, and Tc≥T3, Tm<Tc-ΔT1, the thermal management system 700 enters the first heat dissipation operating mode, where T3 is the high temperature threshold, T1 is the low temperature threshold, and ΔT1 is the first temperature difference threshold.

[0171] Second, when it is determined that the battery 100 and the power converter 200 are about to be in an operating state, and Tc≥T2, T2-ΔT1≤Tm<Tc-ΔT1, the thermal management system 700 enters a first heat dissipation operating mode, where T2 is the ambient temperature threshold.

[0172] Second, as shown in Figure 17 , the thermal management system 700 has a second heat dissipation operating mode. In the second heat dissipation operating mode, the flow paths of the drive pump 710 and the radiator 720 are sequentially communicated with the heat accumulator 730 end to end.

[0173] When it is determined that Tc≥T2 and Tm≥Tc-ΔT1, the thermal management system 700 enters the second heat dissipation operating mode.

[0174] Third, as shown in Figure 18 , the thermal management system 700 has a heat storage operating mode. In the heat storage operating mode, the drive pump 710, the communication pipeline 770 and the heat accumulator 730 are sequentially communicated end to end.

[0175] The thermal management system 700 enters the heat storage operating mode in at least one of the following cases: First, when it is determined that the battery 100 and the power converter 200 are in an operating state, and T2≤Tc<T3, Tm<Tc-ΔT1, the thermal management system 700 enters the heat storage operating mode.

[0176] Second, when it is determined that the battery 100 and the power converter 200 are about to be in an operating state, and Tc≥T2, Tm<T2-ΔT1, the thermal management system 700 enters the heat storage operating mode.

[0177] Fourth, as shown in Figure 19 , the thermal management system 700 has a temperature equalization operating mode. In the temperature equalization operating mode, the drive pump 710 and the communication pipeline 770 are sequentially communicated end to end.

[0178] When it is determined that Tmax-Tmin>ΔT2 and the thermal management system 700 has not entered other operating modes, the thermal management system 700 enters the temperature equalization operating mode, where ΔT2 is the second temperature difference threshold.

[0179] Fifth, as shown in Figure 18 , the thermal management system 700 has a first heating operating mode. In the first heating operating mode, the drive pump 710, the communication pipeline 770 and the heat accumulator 730 are sequentially communicated end to end, and the heater 733 is turned on.

[0180] When it is determined that the battery 100 and the power converter 200 are about to be in an operating state, and Tc<T1, Tm≤Tc+ΔT1, the thermal management system 700 enters the first heating operating mode.

[0181] Sixth, the thermal management system 700 has a second heating operation mode, in which the heater 733 is turned on.

[0182] The thermal management system 700 enters the second heating operation mode under at least one of the following conditions: First, when it is determined that no heat exchange medium flows through the inlet and the outlet of the heat storage bin 735, and Tm<T1, the thermal management system 700 enters the second heating operation mode.

[0183] Second, when it is determined that no heat exchange medium flows through the inlet and the outlet of the heat storage bin 735, the heating demand temperature set by the user is T4, and Tm<T4, the thermal management system 700 enters the second heating operation mode.

[0184] Seventh, the thermal management system 700 has a third heating operation mode, in which the drive pump 710, the communication pipeline 770 and the heat accumulator 730 are sequentially communicated end to end.

[0185] When it is determined that the battery 100 and the power converter 200 are about to be in an operating state, Tc<T1, and Tm>Tc+ΔT1, the thermal management system 700 enters the third heating operation mode.

[0186] The terms "first", "second" and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific sequence or order. It should be understood that the data used in this way are interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second" and the like are usually a category, without limiting the number of objects. For example, a first object may be one or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0187] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present application.

[0188] In the description of the present application, the "first feature" and the "second feature" may include one or more of such features.

[0189] In the description of this application, "multiple" means two or more.

[0190] In the description of this application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact through another feature between them.

[0191] In the description of this application, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0192] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is 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.

[0193] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. An energy storage system, characterized in that, include: Multiple batteries (100) stacked vertically, and a power converter (200) mounted on the batteries (100). The thermal management system (700) includes interconnected connecting pipes (770), a heat accumulator (730), and a radiator (720), wherein the connecting pipes (770) are used for heat exchange with the battery (100) and the power converter (200), and the radiator (720) is installed on the heat accumulator (730).

2. The energy storage system according to claim 1, characterized in that, The energy storage system includes: The heat insulation component (260) is located on both sides of the battery (100) and the power converter (200).

3. The energy storage system according to claim 2, characterized in that, The energy storage system includes: The first heat exchange plate (181) is used to heat exchange the battery (100) through the connecting pipe (770). The first heat exchange plate (181) and the battery (100) are located on the first side of the heat insulation member (260). The second heat exchange plate (251) is used to exchange heat with the power converter (200) through the connecting pipe (770). The second heat exchange plate (251) and the power converter (200) are located on the second side of the heat insulation member (260).

4. The energy storage system according to claim 1, characterized in that, The battery (100) includes: First housing (150); A single battery cell (110) is mounted on the first housing (150). The first heat insulation pad (170) is provided between the battery cell (110) and the first housing (150).

5. The energy storage system according to claim 1, characterized in that, The power converter (200) includes: Second housing (230); The power converter body (210) is mounted on the second housing (230); The second heat insulation pad (240) is provided between the power converter body (210) and the second housing (230).

6. The energy storage system according to claim 1, characterized in that, The thermal management system (700) includes: The drive pump (710) is interconnected with the connecting pipe (770), the heat accumulator (730) and the radiator (720).

7. The energy storage system according to claim 6, characterized in that, The thermal management system (700) includes: The valve assembly (760) has its first to sixth valve ports selectively connected. The first valve port (761) of the valve assembly (760) is connected to the first port of the connecting pipe (770), the second valve port (762) of the valve assembly (760) is connected to the second port of the connecting pipe (770), the third valve port (763) of the valve assembly (760) is connected to the inlet of the heat accumulator (730), the fourth valve port (764) of the valve assembly (760) is connected to the flow path inlet of the radiator (720), the fifth valve port (765) of the valve assembly (760) is connected to the outlet of the drive pump (710), and the sixth valve port (766) of the valve assembly (760) is connected to the inlet of the drive pump (710).

8. The energy storage system according to claim 6, characterized in that, The thermal management system (700) has a first heat dissipation working mode. In the first heat dissipation working mode, the drive pump (710), the connecting pipe (770), the flow path of the radiator (720) and the heat storage device (730) are connected sequentially from end to end.

9. The energy storage system according to claim 6, characterized in that, The thermal management system (700) has a second heat dissipation working mode. In the second heat dissipation working mode, the flow paths of the drive pump (710), the radiator (720), and the heat storage device (730) are connected sequentially from end to end.

10. The energy storage system according to claim 6, characterized in that, The thermal management system (700) has a heat storage working mode. In the heat storage working mode, the drive pump (710), the connecting pipeline (770), and the heat accumulator (730) are connected in sequence.

11. The energy storage system according to claim 6, characterized in that, The thermal management system (700) has a uniform temperature working mode. In the uniform temperature working mode, the drive pump (710) and the connecting pipe (770) are connected end to end in sequence.

12. The energy storage system according to claim 1, characterized in that, The heat storage device (730) is equipped with a heater (733), and the outlet of the heat storage device (730) can be selectively connected to the water supply port (740).

13. The energy storage system according to any one of claims 1-12, characterized in that, The connecting pipe (770) includes a main heat exchange pipe (771) and a branch heat exchange pipe (772). The main heat exchange pipe (771) is interconnected with the flow paths of the heat storage device (730) and the radiator (720). The inlet and outlet of the branch heat exchange pipe (772) are both connected to the main heat exchange pipe (771). The branch heat exchange pipe (772) is used for heat exchange with the battery (100) and the power converter (200). or, The connecting pipe (770) includes a pair connected in series, and the pair of connecting pipes (770) are respectively used for heat exchange with the battery (100) and the power converter (200); or, One side of the connecting pipe (770) is used for heat exchange with the battery (100), and the other side of the heat exchange pipe is used for heat exchange with the power converter (200). or, The heat storage device (730) and the connecting pipe (770) each include a pair. The pair of connecting pipes (770) are respectively used for heat exchange with the battery (100) and the power converter (200). The heat storage device (730) and the connecting pipe (770) correspond one-to-one. Each connecting pipe (770) can be selectively connected to the corresponding heat storage device (730). Each pair of connecting pipes (770) can be selectively connected to the radiator (720). or, The heat storage device (730) and the connecting pipe (770) each include a pair. The pair of connecting pipes (770) are respectively used for heat exchange with the battery (100) and the power converter (200). The heat storage device (730) and the connecting pipe (770) correspond one-to-one. The connecting pipe (770) used for heat exchange with the battery (100) can be selectively connected to the radiator (720), and the connecting pipe (770) used for heat exchange with the power converter (200) is not connected to the radiator (720).

14. The energy storage system according to any one of claims 1-12, characterized in that, The radiator (720) includes: Third shell (7211); A partition (7212) is installed inside the housing of the radiator (720), and the housing of the radiator (720) and the partition (7212) together form the flow path of the radiator (720); Multiple heat dissipation fins (7213) are mounted on the housing; or, The radiator (720) includes: Water inlet pipe (7221); The outlet pipe (7222) is connected to the inlet of the heat accumulator (730); Multiple heat sinks (7223) have flow channels that connect to the inlet pipe (7221) and the outlet pipe (7222). The flow channels of the inlet pipe (7221), the outlet pipe (7222), and the multiple heat sinks (7223) together form the flow path of the radiator (720). or, The radiator (720) includes: Shunt (7231); A manifold (7232), the outlet of which is connected to the inlet of the heat accumulator (730); Multiple heat dissipation pipes (7233) are connected to the splitter (7231) and the combiner (7232). The splitter (7231), the combiner (7232) and the multiple heat dissipation pipes (7233) together form the flow path of the heat sink (720). Multiple fins (7234) are mounted on the heat sink (7233).

15. The energy storage system according to any one of claims 1-12, characterized in that, Including a first heat exchange plate (181), the connecting pipe (770) exchanges heat with the individual cells (110) of the battery (100) through the first heat exchange plate (181); wherein, The first side (1101) of the battery cell (110) mates with the first heat exchange plate (181); or, The second side (1102) of the battery cell (110) mates with the first heat exchange plate (181); or, The bottom surface (1103) of the battery cell (110) is fitted with the first heat exchange plate (181).

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