Energy storage device and temperature control method for energy storage device

Abstract

The embodiments of the present application provide an energy storage device and a temperature control method for the energy storage device, which relate to the field of battery technology. The battery pack installed in the cabinet is electrically connected to the energy storage interface, the charging converter is electrically connected to the battery pack, the charging connector is electrically connected to the charging converter, and the cooling system is used to perform heat exchange with the charging converter and the charging connector. The first heat dissipation device is arranged in the cooling system. The temperature control system is used to perform heat exchange with the battery pack, and the cooling system and the temperature control system are thermally separated. The second heat dissipation device is arranged in the temperature control system, the controller is used to keep the cooling system closed and start the temperature control system in the first working mode, the controller is used to start the cooling system and the temperature control system in the second working mode, and the controller is used to keep the cooling system closed and start the temperature control system in the sleep mode. The energy storage device and the temperature control method for the energy storage device in the embodiments of the present application can better adapt to the temperature control requirements of the energy storage device in different working modes.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to an energy storage device and a temperature control method for the energy storage device. Background Art

[0002] New energy batteries are increasingly used in life and industry. For example, new energy vehicles equipped with batteries have been widely used. In addition, batteries are increasingly used in the field of energy storage. The battery pack is set in the energy storage device to charge new energy vehicles and other electrical equipment through the charging connector. The charging converter, charging connector and battery pack in the energy storage device will generate heat and require a certain degree of cooling.

[0003] In the related art, the structure used for adjusting the temperature of the charging connector, charging inverter and battery pack in the energy storage device is difficult to adapt to the temperature adjustment requirements of the energy storage device in different working modes. Summary of the invention

[0004] In view of this, the embodiments of the present application hope to provide an energy storage device and a temperature control system for the energy storage device, which can better adapt to the temperature control requirements of the energy storage device in different working modes.

[0005] To achieve the above purpose, the technical solution of the embodiment of the present application is implemented as follows:

[0006] A first aspect of an embodiment of the present application provides an energy storage device, the energy storage device having at least a first working mode, a second working mode and a sleep mode, the energy storage device comprising:

[0007] The cabinet has an energy storage interface;

[0008] A battery pack is installed in the cabinet, and the battery pack is electrically connected to the energy storage interface;

[0009] a charging converter, electrically connected to the battery pack to convert electrical energy input or output by the battery pack;

[0010] a charging connector, electrically connected to the charging converter to transmit the electric energy converted by the charging converter;

[0011] a cooling system, configured to perform heat exchange with the charging converter and the charging connector;

[0012] A first heat dissipation device, disposed in the cooling system;

[0013] A temperature control system, used for performing heat exchange with the battery pack, wherein the cooling system and the temperature control system are thermally separated;

[0014] A second heat dissipation device, arranged in the temperature control system;

[0015] A controller is used to keep the cooling system closed and start the temperature control system in the first working mode, the controller is used to start the cooling system and the temperature control system in the second working mode, and the controller is used to keep the cooling system closed and start the temperature control system in the sleep mode.

[0016] In the scheme of the embodiment of the present application, the cooling system and the temperature control system are thermally separated. The cooling system is used for heat exchange with the charging inverter and the charging connector, and the temperature control system is used for heat exchange with the battery pack. During the process of charging the battery pack, the battery pack works, but the charging connector and the charging inverter do not work. The cooling system can be turned off and the temperature control system can be turned on to adjust the temperature of the battery pack. During the process of the charging connector transmitting the electric energy delivered by the charging inverter, the battery pack, the charging connector and the charging inverter all work. The cooling system and the temperature control system can be turned on to adjust the temperature of the battery pack, the charging connector and the charging inverter, so as to adapt to the temperature control of different temperature control objects in different working modes of the energy storage device.

[0017] In one embodiment, the first heat dissipation device is a cooling container for accommodating a cooling medium, the space in the cooling container for accommodating a cooling medium is arranged in the cooling system, the cooling container performs heat exchange with the air, and the second heat dissipation device includes a refrigerator and a first heat exchanger, and the first heat exchanger is arranged across the refrigerator and the temperature control system.

[0018] In the scheme of the embodiment of the present application, the charging converter is cooled by a cooling container, and the refrigerator is used to cool the iodine excess. The temperature requirements of the charging converter and the battery pack for the cooling medium are quite different. Since the maximum temperature allowed by the temperature-regulating fluid required for the charging converter and the maximum temperature allowed by the temperature-regulating fluid required for the charging connector are higher than the ambient temperature, that is, the temperature of the temperature-regulating fluid required for the charging converter and the temperature of the temperature-regulating fluid required for the charging connector can be higher than the ambient temperature, the air in the surrounding environment is used to flow through the cooling container to cool the cooling container, which can basically meet the cooling requirements of the charging connector and the charging converter, which is beneficial to reducing energy consumption. The temperature of the temperature-regulating fluid required for the battery pack is lower than the ambient temperature. The temperature of the temperature-regulating fluid in the temperature control system can be reduced to below the ambient temperature by the refrigerator to better meet the temperature control requirements of the battery pack.

[0019] In one embodiment, the refrigerator includes a compressor, a condenser, an expansion valve, and an evaporator connected end to end in sequence, and the first heat exchanger is arranged across the evaporator and the temperature control system.

[0020] In the solution of the embodiment of the present application, the refrigerator includes a compressor, a condenser, an expansion valve and an evaporator. The temperature of the temperature regulating medium can be reduced quickly by the condenser, so that the battery pack can be in a more suitable working environment.

[0021] In one embodiment, the energy storage device also includes at least one fan, which is installed on the cabinet and is used to dissipate heat from the condenser and the cooling container. Projected along the air outlet direction of the fan, the projection area of ​​the condenser and the projection area of ​​the cooling container are staggered.

[0022] In the solution of the embodiment of the present application, along the wind direction of the fan, the projection area of ​​the condenser and the projection area of ​​the first heat sink are staggered. In the process of the fan driving the air flow, the heat generated by the condenser and the first heat sink has little effect on each other, which can increase the heat dissipation effect of the fan to a certain extent.

[0023] In one embodiment, projected along the air outlet direction of the fans, a projection area of ​​each fan spans a projection area of ​​the condenser and a projection area of ​​the cooling container.

[0024] In the solution of the embodiment of the present application, the projection area of ​​the fan is arranged across the projection area of ​​the condenser and the projection area of ​​the cooling container. In the process of the fan dissipating heat from the condenser and the cooling container, the flowing air carrying the heat of the condenser is difficult to repeatedly act on the cooling container, thereby alleviating the degree of mutual influence between the condenser and the cooling container.

[0025] In one embodiment, the condenser and the cooling container are both located above the battery pack, and / or the condenser and the cooling container are both located above the fan.

[0026] In the scheme of the embodiment of the present application, the battery pack will generate a large amount of heat during operation, and the battery pack has a large heat dissipation demand. The cooling medium in the cooling system will bring the heat of the charging inverter to the cooling container, and the condenser in the temperature control system will also generate a large amount of heat. Hot air usually floats upward, and the condenser and the cooling container are located above the battery pack to alleviate the transfer of heat to the battery pack, so the heat dissipation capacity of the battery pack can be increased to a certain extent. Furthermore, the cooling container and the condenser are located above the fan, and the fan blows upward. The generated wind acts on the cooling container and the condenser, which can discharge the heat of the cooling container and the condenser upward, and the heat dissipation effect is better. If the cooling container is placed below the fan, the fan blows downward, and the generated wind will move downward with the heat for a distance and then move upward, so that it will act on the cooling container and the condenser again, and the heat dissipation effect is poor.

[0027] In one embodiment, the energy storage device further includes a first circulation pump, and the cooling system includes:

[0028] a first circulation loop, wherein the first circulation pump and a cooling channel of the charging converter are both connected in series to the first circulation loop;

[0029] A sub-cooling system, wherein the cooling channel of the charging connector is arranged in the sub-cooling system, the sub-cooling system comprises a first pipeline, the first pipeline is connected in series with the first circulation pump, the first pipeline is connected in parallel with the cooling channel of the charging inverter, and the first heat dissipation device is arranged in at least one of the first circulation loop and the sub-cooling system to cool the charging connector and the charging inverter.

[0030] In the scheme of the embodiment of the present application, the energy storage device also includes a first circulation pump, the cooling system includes a first circulation loop and a sub-cooling system, the sub-cooling system includes a first pipeline, the charging converter is arranged in the first circulation loop, and the first heat dissipation device is arranged in at least one of the first circulation loop and the sub-cooling system. The charging converter and the charging connector are arranged on different pipelines, which can facilitate the layout of the cooling system, and the layout of the first circulation loop and the sub-cooling system can be free from the relative positions of the charging converter and the charging connector. After the first circulation loop and the sub-cooling system are arranged, the first heat dissipation device can cool the charging connector and the charging converter. Furthermore, since the cooling temperatures of the charging connector and the charging converter are slightly different, the sub-cooling system and the first circulation loop can adjust the flow rates of different cooling media accordingly to meet different cooling requirements.

[0031] In one embodiment, the sub-cooling system further includes a second heat exchanger, a second circulation pump and a second circulation loop, one of the heat exchange channels of the second heat exchanger is arranged in the first pipeline, the cooling channel of the charging connector, the second circulation pump and another heat exchange channel of the second heat exchanger are connected in series to the second circulation loop, the second circulation loop is isolated from the first pipeline, and the first heat dissipation device is arranged in at least one of the first circulation loop, the heat exchange channel of the second heat exchanger and the second circulation loop.

[0032] In the solution of the embodiment of the present application, one of the heat exchange channels of the second heat exchanger is arranged in the first pipeline, and the other heat exchange channel is connected in series to the second circulation loop, and the first pipeline and the second circulation loop are isolated from each other. The first circulation loop and the second circulation loop can be provided with different cooling media according to the characteristics of the charging converter and the charging connector, thereby increasing the adaptability of the energy storage device and providing a better user experience.

[0033] In one embodiment, the temperature control system includes a third circulation loop and a third circulation pump, the temperature control flow channel of the battery pack and the third circulation pump are connected in series to the third circulation loop, and the second heat dissipation device is arranged in the third circulation loop.

[0034] In the solution of the embodiment of the present application, the second heat dissipation device is arranged in the third circulation loop, and the temperature requirement of the temperature regulating medium of the battery pack is lower than the ambient temperature. The second heat dissipation device can better reduce the temperature regulating medium in the temperature regulating flow channel of the battery pack to a more suitable temperature.

[0035] In one embodiment, the energy storage device also includes an energy storage inverter, which is electrically connected to the battery pack and the energy storage interface respectively to convert the electric energy input or output of the battery pack, and the temperature control system also includes a second pipeline, which is connected in parallel with the temperature control flow channel of the battery pack, and the second pipeline is connected in series with the third circulation pump, and the temperature control flow channel of the energy storage inverter is arranged in the second pipeline.

[0036] In the solution of the embodiment of the present application, the second pipeline is connected in parallel with the temperature regulating flow channel of the battery pack, the second pipeline is connected in series with the third circulating pump, and the temperature regulating flow channel of the energy storage converter is arranged in the second pipeline. The required temperature of the cooling medium of the energy storage converter is slightly different from the required temperature of the cooling medium of the battery pack. The second pipeline is connected in parallel with the temperature regulating flow channel of the battery pack, and the flow rate of the cooling medium in the second pipeline and the temperature regulating flow channel of the battery pack can be adaptively adjusted according to the actual temperature regulation requirements.

[0037] In one embodiment, the energy storage device further includes a valve, and the valve and the temperature regulating flow channel of the energy storage converter are connected in series to the second pipeline.

[0038] In the solution of the embodiment of the present application, the energy storage device also includes a valve, which is connected in series with the temperature regulating flow channel of the energy storage converter. During the process of the energy storage device charging the external power-consuming device, the energy storage converter is in a dormant device, and there is no need to adjust the temperature of the energy storage converter. Closing the valve can cut off the flow of the cooling medium to the energy storage converter, so that the second heat dissipation device and the temperature regulating system can fully act on the battery pack to improve the temperature regulating effect.

[0039] In one embodiment, the temperature control system further includes a heater, and the heater is disposed in the third circulation loop.

[0040] In the solution of the embodiment of the present application, the temperature control system also includes a heater arranged in the third circulation loop. The working performance of the battery pack will be affected to a certain extent in a low temperature environment. The heater can heat the third circulation loop to increase the temperature of the battery pack, thereby ensuring the normal operation of the battery pack to a certain extent.

[0041] A second aspect of an embodiment of the present application provides a temperature adjustment method for an energy storage device, the temperature adjustment method comprising:

[0042] Acquire the working mode of the energy storage device, wherein the temperature adjustment object corresponding to each working mode includes at least a battery pack;

[0043] At least the temperature control system is started according to the working mode, and the temperature control system is used to perform heat exchange with the battery pack. The cooling system and the temperature control system are thermally separated, and the cooling system is used to perform heat exchange with the charging inverter and the charging connector. The first heat dissipation device is arranged in the cooling system, and the second heat dissipation device is arranged in the temperature control system. The charging inverter is electrically connected to the battery pack and the charging connector respectively. When the working mode is a first working mode for charging the battery pack, the cooling system is in a closed state and the temperature control system is in an open state. When the working mode is a second working mode for discharging the battery pack to the charging connector through the charging inverter, the cooling system and the temperature control system are both in an open state. When the working mode is a sleep mode, the cooling system is in a closed state and the temperature control system is in an open state.

[0044] In the scheme of the embodiment of the present application, at least the temperature control system is started according to the working mode, and the charging converter, charging connector and battery pack can be temperature controlled according to the actual requirements of the working mode. During the operation of the energy storage device, there is a situation where the charging converter and the battery pack need to be cooled. Since the temperature difference between the charging converter and the battery pack in the actual application scenario is large, the first heat sink and the second heat sink can be adjusted according to different heat dissipation requirements through the cooling system and the temperature control system, respectively, so as to make full use of the heat sink in the energy storage device for cooling the charging converter and the battery pack. Furthermore, the cooling system is cooled by the first heat sink, and the temperature control system is temperature controlled by the second heat sink. The temperature control fluid in the cooling system and the temperature control fluid in the temperature control system can have a large temperature difference, so that the energy storage device can reduce energy consumption while basically meeting the overall temperature control requirements.

[0045] In one embodiment, the working mode is a first working mode for charging the battery pack, and at least starting a temperature control system according to the working mode includes:

[0046] The temperature control system and the refrigerator of the second heat dissipation device are started while the cooling system remains closed.

[0047] In the solution of the embodiment of the present application, during the process of charging the battery pack, the battery pack will generate a lot of heat during operation, and the temperature required by the battery pack for the cooling medium is lower than the ambient temperature. By starting the refrigerator and the third circulating pump, the battery pack can be cooled well.

[0048] In one embodiment, the temperature adjustment object corresponding to the first working mode also includes an energy storage converter, and starting the temperature adjustment system and the refrigerator of the second heat dissipation device while the cooling system remains closed includes:

[0049] When the cooling system remains closed, starting the compressor in the refrigerator of the second heat dissipation device to cool the third circulation loop of the temperature control system;

[0050] While the cooling system remains closed, the third circulation pump in the temperature control system is started, the temperature control flow channel of the battery pack and the third circulation pump are connected in series to the third circulation loop of the temperature control system, the second heat dissipation device is arranged in the third circulation loop, the temperature control flow channel of the energy storage inverter is arranged in the second pipeline of the temperature control system, the second pipeline is connected in parallel with the temperature control flow channel of the battery pack, and the second pipeline is connected in series with the third circulation pump.

[0051] In the solution of the embodiment of the present application, the second pipeline is connected in parallel with the temperature control channel of the battery pack, and the flow rate of the cooling medium in the second pipeline and the temperature control channel of the battery pack can be adaptively adjusted according to actual temperature control requirements.

[0052] In one embodiment, the temperature control system and the refrigerator of the second heat dissipation device are started while the cooling system remains closed, further comprising:

[0053] The valve provided in the temperature control system is opened while the cooling system remains closed, and the valve and the temperature control flow channel of the energy storage converter are connected in series to a second pipeline in the temperature control system.

[0054] In the embodiment of the present application, a valve is provided in the second pipeline of the temperature control system. The valve can be closed to stop the cooling medium from flowing through the temperature control flow channel of the energy storage converter, thereby relieving the temperature control pressure of the second heat dissipation device on the temperature control system when the energy storage converter does not need to be temperature controlled, thereby reducing energy consumption to a certain extent.

[0055] In one embodiment, the working mode is a second working mode in which the battery pack discharges to the charging connector through the charging converter, and the temperature control object corresponding to the second working mode also includes the charging connector and the charging converter. At least the temperature control system is started according to the working mode, including:

[0056] The cooling system, the temperature adjustment system and the refrigerator of the second heat dissipation device are started.

[0057] In the solution of the embodiment of the present application, during the process of charging and discharging the battery pack through the charging converter, the charging connector, the charging converter and the battery pack are all in working state and generate a certain amount of heat. According to actual use requirements, the required temperature of the cooling medium for the charging connector is similar to the required temperature of the cooling medium for the charging converter. The temperature can be adjusted well through the cooling system, the temperature control system and the refrigerator.

[0058] In one embodiment, the temperature adjustment object corresponding to the second working mode also includes an energy storage converter, and starting the cooling system, the temperature adjustment system and the refrigerator of the second heat dissipation device includes:

[0059] Starting the first circulation pump and the second circulation pump of the cooling system to cool the charging inverter and the charging connector;

[0060] Starting the compressor in the refrigerator of the second heat dissipation device to cool the third circulation loop of the temperature control system;

[0061] The third circulation pump in the temperature control system is started, the temperature control flow channel of the battery pack and the third circulation pump are connected in series to the third circulation loop of the temperature control system, the second heat dissipation device is arranged in the third circulation loop, the temperature control flow channel of the energy storage inverter is arranged in the second pipeline of the temperature control system, the second pipeline is connected in parallel with the temperature control flow channel of the battery pack, and the second pipeline is connected in series with the third circulation pump.

[0062] In the solution of the embodiment of the present application, the temperature required for the cooling medium of the battery pack is similar to the temperature required for the cooling medium of the energy storage converter. The battery pack and the energy storage converter share a temperature control system, which can better utilize the heat dissipation capacity of the heat dissipation system and the second heat dissipation device.

[0063] In one embodiment, starting the cooling system, the temperature adjustment system and the refrigerator of the second heat dissipation device also includes:

[0064] The valve provided in the temperature control system is opened, and the valve and the temperature control flow channel of the energy storage converter are connected in series to the second pipeline in the temperature control system.

[0065] In the solution of the embodiment of the present application, a valve is provided in the second pipeline of the temperature control system. The valve can be closed to stop the cooling medium from flowing through the temperature control flow channel of the energy storage converter, thereby relieving the temperature control pressure of the second heat dissipation device on the temperature control system when the energy storage converter does not need to be temperature controlled, thereby reducing energy consumption to a certain extent.

[0066] In one embodiment, the working mode is a sleep mode, and at least starting the temperature control system according to the working mode includes:

[0067] The temperature control system is started while the cooling system remains closed.

[0068] In the solution of the embodiment of the present application, when the working mode is the sleep mode, the cooling system is turned off and the temperature control system is started. When the working mode is the sleep mode, the battery pack, the charging connector and the charging converter are not working, but the battery pack has certain temperature requirements during the startup process, and the battery pack is at an inappropriate temperature for a long time, which will affect the service life of the battery pack. By starting the temperature control system, the battery pack can be adjusted to a suitable temperature.

[0069] In one embodiment, starting the temperature control system while the cooling system remains closed includes:

[0070] The third circulation pump in the temperature control system is started while the cooling system remains closed, the temperature control flow channel of the battery pack and the third circulation pump are connected in series to the third circulation loop of the temperature control system, and the second heat dissipation device is arranged in the third circulation loop;

[0071] While the cooling system remains closed, close the valve provided in the temperature control system, the valve and the temperature control channel of the energy storage inverter are connected in series to the second pipeline in the temperature control system, the second pipeline is connected in parallel to the temperature control channel of the battery pack, and the second pipeline is connected in series with the third circulation pump. In the scheme of the embodiment of the present application, the energy storage device is in sleep mode, and the charging connector, charging inverter, energy storage inverter and battery pack are all in a closed state. The battery pack will be affected by the ambient temperature, resulting in the battery pack failing to start normally. By starting the third circulation pump, the cooling medium in the temperature control system can be driven to flow, so that the battery pack can be as close to the normal operating temperature as possible.

[0072] In one embodiment, the temperature adjustment method further includes:

[0073] The compressor in the refrigerator of the second heat dissipation device is started to refrigerate the third circulation loop of the temperature control system while the cooling system remains closed.

[0074] In the solution of the embodiment of the present application, when the ambient temperature is greater than the normal starting temperature of the battery pack, the compressor in the refrigerator of the second heat dissipation device can be started to cool the battery pack so that the temperature of the battery pack is close to the normal operating temperature.

[0075] In one embodiment, the temperature adjustment method further includes:

[0076] The heater provided in the third circulation loop is started while the cooling system is kept closed to heat the third circulation loop of the temperature control system.

[0077] In the solution of the embodiment of the present application, when the ambient temperature is lower than the normal starting temperature of the battery pack, the heater arranged in the third circulation loop can be started to heat the cooling medium in the third circulation loop so that the temperature of the battery pack is close to the normal operating temperature.

[0078] In one embodiment, the temperature adjustment method further includes:

[0079] Start the fan for cooling.

[0080] In the solution of the embodiment of the present application, starting the fan to dissipate heat from the first heat dissipation device and the second heat dissipation device can drive the air to flow quickly, thereby bringing the heat in the energy storage device out of the cabinet more quickly, and the heat dissipation capacity of the energy storage device is relatively high.

[0081] Effect of the invention:

[0082] In the scheme of the embodiment of the present application, the cooling system and the temperature control system are thermally separated. The cooling system is used for heat exchange with the charging inverter and the charging connector, and the temperature control system is used for heat exchange with the battery pack. During the process of charging the battery pack, the battery pack works, but the charging connector and the charging inverter do not work. The cooling system can be turned off and the temperature control system can be turned on to adjust the temperature of the battery pack. During the process of the charging connector transmitting the electric energy delivered by the charging inverter, the battery pack, the charging connector and the charging inverter all work. The cooling system and the temperature control system can be turned on to adjust the temperature of the battery pack, the charging connector and the charging inverter, so as to adapt to the temperature control of different temperature control objects in different working modes of the energy storage device. BRIEF DESCRIPTION OF THE DRAWINGS

[0083] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0084] Figure 1 A simplified structural diagram of the energy storage device of the first embodiment of the present application;

[0085] Figure 2 A simplified structural diagram of an energy storage device according to a second embodiment of the present application;

[0086] Figure 3 A simplified structural diagram of an energy storage device according to a third embodiment of the present application;

[0087] Figure 4 A schematic diagram of the structure of an energy storage device according to a fourth embodiment of the present application;

[0088] Figure 5 A simplified structural diagram of an energy storage device according to a fifth embodiment of the present application;

[0089] Figure 6 This is a flow chart of a temperature control method according to a sixth embodiment of the present application;

[0090] Figure 7This is a flow chart of a temperature control method according to a seventh embodiment of the present application;

[0091] Figure 8 This is a schematic flow chart of a temperature control method according to an eighth embodiment of the present application;

[0092] Fig. 9 Schematic diagram of the flow of the temperature adjustment method of the ninth embodiment of the present application;

[0093] Fig.10 Schematic diagram of the temperature control method according to the tenth embodiment of the present application;

[0094] Fig.11 Schematic diagram of the flow of the temperature adjustment method according to the eleventh embodiment of the present application;

[0095] Fig.12 A schematic flow chart of a temperature control method for an energy storage device in a sleep mode according to an embodiment of the present application.

[0096] Description of Reference Numerals

[0097] 1. Cabinet; 2. Battery pack; 3. Energy storage inverter; 4. Charging inverter; 5. Charging connector; 6. Cooling system; 60. First circulation loop; 61. Sub-cooling system; 610. First pipeline; 611. Second heat exchanger; 612. Second circulation pump; 613. Second circulation loop; 7. First heat dissipation device; 8. Temperature control system; 80. Third circulation loop; 81. Third circulation pump; 82. Second pipeline; 83. Heater; 9. Second heat dissipation device; 90. Refrigerator; 900. Compressor; 901. Condenser; 902. Expansion valve; 903. Evaporator; 91. First heat exchanger; 10. Fan; 11. First circulation pump; 12. Valve. DETAILED DESCRIPTION

[0098] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0099] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions.

[0100] In the description of the embodiments of the present application, the technical terms "first", "second", "third", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0101] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0102] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0103] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "top", "bottom", "upper", and "lower" are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the embodiments of the present application and simplifying the description. They do not indicate or imply that the referred device or element must have a specific orientation, be constructed, operated, or used in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0104] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0105] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and may be direct contact or contact through an intermediate medium layer. It may be contact with essentially no interaction force between the two contacting parties, or it may be contact with interaction force between the two contacting parties.

[0106] In the related art, the battery pack of the energy storage device supplies power to the charging connector through the charging inverter, so that the charging connector can supply power to electrical devices such as electric vehicles. The external power supply charges the battery pack so that the battery pack stores electrical energy. In different working modes, not all charging inverters, charging connectors and battery packs need to be temperature-controlled. However, during the operation of the energy storage device in the related art, a temperature-controlled fluid flows through the charging inverter, charging connector and battery pack for temperature control, making it difficult to specifically adapt to the temperature control requirements of the energy storage device in different working modes.

[0107] The implementation of this application cools the charging converter 4 by setting a first heat sink 7 and a cooling system 6, and sets a second heat sink 9 and a temperature control system 8 to control the temperature of the battery pack 2. The temperature control system 8 and the cooling system 6 are thermally separated and are unlikely to affect each other. The first heat sink 7 and the second heat sink 9 can be adjusted according to the required temperature of the cooling medium of the charging converter 4 and the required temperature of the cooling medium of the battery pack 2, respectively, which is beneficial to reducing energy consumption. By thermally separating the cooling system 6 and the energy storage system from each other, the temperature is adjusted for different temperature control objects in different working modes, and the energy storage device can better adapt to different working modes.

[0108] The battery pack 2 refers to a device capable of outputting electric energy. For example, the battery pack 2 composed of battery cells can output electric energy. For example, the battery pack 2 composed of battery cells can output electric energy through a battery module composed of battery cells and a battery pack 2 composed of a battery module.

[0109] The present application also provides a battery pack 2, which includes a mounting shell and a battery cell, wherein the battery cell is disposed inside the mounting shell.

[0110] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0111] In the embodiment of the present application, the battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., but the embodiment of the present application is not limited to this.

[0112] Illustratively, the battery cell includes a housing and an electrode assembly, and the electrode assembly is disposed within the housing.

[0113] In some embodiments, the housing may be a sealed structure or a non-sealed structure. As an example, when the housing is a non-sealed structure, the housing plays a role in protecting the electrode assembly, and a sealing bag is also included between the housing and the electrode assembly, and the sealing bag is used to encapsulate the electrode assembly and the electrolyte. Specifically, the sealing bag may be a bag-shaped insulating member or an aluminum-plastic film.

[0114] This application also provides an energy storage device, see Figures 1 to 5 The energy storage device has at least a first working mode, a second working mode and a sleep mode. The energy storage device includes a cabinet 1, a battery pack 2, a charging converter 4, a charging connector 5, a cooling system 6, a first heat dissipation device 7, a temperature control system 8, a second heat dissipation device 9, a fan 10 and a controller. The cabinet 1 has an energy storage interface. The battery pack 2 is installed in the cabinet 1, and the battery pack 2 is electrically connected to the energy storage interface. The charging converter 4 is electrically connected to the battery pack 2 to convert the electric energy input or output by the battery pack 2. The charging connector 5 is electrically connected to the charging converter 4 to transmit the electric energy converted by the charging converter 4. The cooling system 6 is used for heat exchange with the charging converter 4. The first heat dissipation device 7 is arranged in the cooling system 6. The temperature control system 8 is used for heat exchange with the battery pack 2, and the cooling system 6 and the temperature control system 8 are thermally separated. The second heat dissipation device 9 is arranged in the temperature control system 8. The controller is used to keep the cooling system 6 closed and start the temperature control system 8 in the first working mode, the controller is used to start the cooling system 6 and the temperature control system 8 in the second working mode, and the controller is used to keep the cooling system 6 closed and start the temperature control system 8 in the sleep mode.

[0115] The charging converter 4 is a converter electrically connected between the battery pack 2 and the charging connector 5 for converting the electric energy outputted from or inputted to the battery pack 2 .

[0116] Exemplarily, the energy storage device further includes an energy storage converter 3, which is electrically connected to the battery pack 2 and the energy storage interface, respectively.

[0117] The energy storage converter 3 is a converter electrically connected between an external power source and the battery pack 2 for converting electric energy output from or input to the battery pack 2 .

[0118] The converter is an electrical device that changes the voltage, frequency, number of phases and other electrical quantities or characteristics of the power system. The charging connector 5 is an electrical device that is electrically connected to an electrical device to transfer the electrical energy in the battery pack 2 to the electrical device.

[0119] Exemplarily, the charging connector 5 is a charging gun.

[0120] Exemplarily, the charging connector 5 is a structure for charging new energy vehicles.

[0121] Exemplarily, the energy storage device is a new energy charging pile.

[0122] It should be noted that the cooling system 6 is a regulating system with a cooling function.

[0123] It should be noted that the temperature control system 8 is a control system with cooling and heating functions.

[0124] It should be noted that different regulating systems are thermally separated, that is, different regulating systems do not exchange heat through a heat exchanger, and a heat exchanger is not installed between two different regulating systems.

[0125] It should be noted that in the same regulation system, when the flow channels in the same system are interconnected, the cooling medium can circulate to the flow channels in the same regulation system. When there are mutually isolated flow channels in the same system, the mutually isolated flow channels are set in the heat exchanger, and the heat exchanger is set across the mutually isolated flow channels. The cooling medium in the mutually isolated flow channels can exchange heat through the heat exchanger. In other words, in the same regulation system, either the flow channels can be interconnected, or if there are mutually isolated flow channels, heat can be exchanged through the heat exchanger.

[0126] It should be explained that, in two mutually isolated flow channels, the cooling medium in any one of the flow channels will not flow to the other isolated flow channel.

[0127] It should be explained that a heat exchanger is a structure that can be used to perform heat exchange between different flow channels that are isolated from each other.

[0128] In the scheme of the embodiment of the present application, the cooling system 6 is thermally separated from the temperature control system 8. The cooling system 6 is used for heat exchange with the charging inverter 4 and the charging connector 5, and the temperature control system 8 is used for heat exchange with the battery pack 2. During the process of charging the battery pack 2, the battery pack 2 works, but the charging connector 5 and the charging inverter 4 do not work. The cooling system 6 can be turned off and the temperature control system 8 can be turned on to control the temperature of the battery pack 2. During the process of the charging connector 5 transmitting the electric energy transmitted by the charging inverter 4, the battery pack 2, the charging connector 5 and the charging inverter 4 all work. The cooling system 6 and the temperature control system 8 can be turned on to control the temperature of the battery pack 2, the charging connector 5 and the charging inverter 4, thereby adapting to the temperature control of different temperature control objects in different working modes of the energy storage device.

[0129] Exemplarily, the cooling system 6 and the temperature control system 8 are thermally separated, the cooling system 6 is cooled by the first heat dissipation device 7, and the temperature control system 8 is temperature controlled by the second heat dissipation device 9. The temperature control fluid in the cooling system 6 and the temperature control fluid in the temperature control system 8 can have a large temperature difference, so that the energy storage device can reduce energy consumption while basically meeting the overall temperature control requirements.

[0130] In one embodiment, please refer to Figure 1 and Figure 2 The first heat dissipation device 7 is a cooling container for accommodating a cooling medium. The space in the cooling container for accommodating a cooling medium is arranged in the cooling system 6. The cooling container exchanges heat with the air. The second heat dissipation device 9 includes a refrigerator 90 and a first heat exchanger 91. The first heat exchanger 91 is arranged across the refrigerator 90 and the temperature control system 8.

[0131] The first heat exchanger 91 is a heat exchanger capable of performing heat exchange between the refrigerator 90 and the temperature control system 8 .

[0132] The refrigerator 90 is a structure capable of forced cooling.

[0133] During operation of the energy storage device, the temperature of the thermostatic fluid required by the battery pack 2 is lower than the ambient temperature, the maximum allowable temperature of the thermostatic fluid required by the charging converter 4 and the maximum allowable temperature of the thermostatic fluid required by the charging connector 5 are higher than the ambient temperature.

[0134] For example, the temperature of the temperature-regulating fluid required for the battery pack 2 is about 18° C. to 20° C. When the ambient temperature is about 45° C., the maximum temperature allowed for the temperature-regulating fluid required for the charging converter 4 is about 63° C. to 65° C. When the ambient temperature is about 45° C., the maximum temperature allowed for the temperature-regulating fluid required for the charging connector 5 is about 85° C.

[0135] In the scheme of the embodiment of the present application, the charging converter 4 is cooled by a cooling container, and the refrigerator 90 cools the iodine excess. The temperature requirements of the charging converter 4 and the battery pack 2 for the cooling medium are quite different. Since the maximum temperature allowed by the required temperature-regulating fluid corresponding to the charging converter 4 and the maximum temperature allowed by the required temperature-regulating fluid corresponding to the charging connector 5 are higher than the ambient temperature, that is, the temperature of the required temperature-regulating fluid corresponding to the charging converter 4 and the required temperature-regulating fluid corresponding to the charging connector 5 can be higher than the ambient temperature, the air in the surrounding environment is used to flow through the cooling container to cool the cooling container, which can basically meet the cooling requirements of the charging connector 5 and the charging converter 4, which is conducive to reducing energy consumption. The temperature of the required temperature-regulating fluid corresponding to the battery pack 2 is lower than the ambient temperature. The refrigerator 90 can reduce the temperature of the temperature-regulating fluid in the temperature control system 8 to below the ambient temperature, so as to better meet the temperature control requirements of the battery pack 2.

[0136] It is understandable that the embodiments of the present application are not limited to the first heat dissipation device 7 being a cooling container for containing a cooling medium. Exemplarily, the first heat dissipation device 7 is a refrigerator 90 .

[0137] In one embodiment, please refer to Figure 3 The refrigerator 90 includes a compressor 900, a condenser 901, an expansion valve 902 and an evaporator 903 which are connected end to end in sequence, and the first heat exchanger 91 is arranged across the evaporator 903 and the temperature control system 8.

[0138] The compressor 900 refers to a structure that compresses and drives the refrigerant in the refrigerant circuit.

[0139] The condenser 901 refers to a structure that can convert gas or vapor into liquid and transfer the heat in the pipeline to the nearby air in a faster manner.

[0140] The evaporator 903 refers to a structure that utilizes the fact that liquid low-temperature refrigerant easily evaporates under low pressure to transform into steam and absorbs the heat of the cooled medium to achieve the purpose of refrigeration.

[0141] The expansion valve 902 refers to a structure that allows the liquid refrigerant to be throttled to become low-temperature and low-pressure wet steam, and then the refrigerant absorbs heat in the evaporator 903 to achieve a cooling effect.

[0142] The projection area of ​​the condenser 901 and the projection area of ​​the cooling container are staggered with each other, which means that there is no overlapping part between the projection area of ​​the condenser 901 and the projection area of ​​the cooling container, and the contour lines of the projection areas can overlap.

[0143] In the embodiment of the present application, the refrigerator 90 includes a compressor 900, a condenser 901, an expansion valve 902 and an evaporator 903. The condenser 901 can quickly reduce the temperature of the temperature regulating medium, so that the battery pack 2 can be in a more suitable working environment.

[0144] It is to be understood that the embodiments of the present application do not limit the type of the refrigerator 90. Exemplarily, the refrigerator 90 is a semiconductor refrigerator 90, which includes a thermoelectric module, a heat sink, and electrodes.

[0145] In one embodiment, the energy storage device also includes at least one fan 10, which is installed in the cabinet 1. The fan 10 is used to dissipate heat for the condenser 901 and the cooling container. When projected along the air outlet direction of the fan 10, the projection area of ​​the condenser 901 and the projection area of ​​the cooling container are staggered.

[0146] In the solution of the embodiment of the present application, along the projection of the wind direction of the fan 10, the projection area of ​​the condenser 901 and the projection area of ​​the first heat sink 7 are staggered. In the process of the fan 10 driving the air flow, the heat generated by the condenser 901 and the first heat sink 7 have little effect on each other, which can increase the heat dissipation effect of the fan 10 to a certain extent.

[0147] It is understandable that the embodiments of the present application are not limited to the projection along the air outlet direction of the fan 10, and the projection area of ​​the condenser 901 and the projection area of ​​the cooling container are staggered. Exemplarily, along the air outlet direction of the fan 10, the projection area of ​​the condenser 901 and the projection area of ​​the cooling container at least partially overlap.

[0148] In one embodiment, please refer to Figure 1, projected along the air outlet direction of the fan 10, the projection area of ​​each fan 10 spans the projection area of ​​the condenser 901 and the projection area of ​​the cooling container.

[0149] The projection area of ​​the fan 10 straddling the projection area of ​​the condenser 901 and the projection area of ​​the cooling container means that the projection area of ​​the fan 10 overlaps with the projection area of ​​the condenser 901 and the projection area of ​​the cooling container.

[0150] In the solution of the embodiment of the present application, the projection area of ​​the fan 10 is arranged across the projection area of ​​the condenser 901 and the projection area of ​​the cooling container. In the process of the fan 10 dissipating heat from the condenser 901 and the cooling container, the flowing air carrying the heat of the condenser 901 is difficult to repeatedly act on the cooling container, thereby alleviating the degree of mutual influence between the condenser 901 and the cooling container.

[0151] It is understandable that the embodiments of the present application do not limit the arrangement of the fan 10, the condenser 901 and the cooling container. For example, along the air outlet direction of the fan 10, the fan 10, the condenser 901 and the cooling container are arranged in sequence.

[0152] In one embodiment, the condenser 901 and the cooling container are both located above the battery pack 2 , and / or the condenser 901 and the cooling container are both located above the fan 10 .

[0153] In the scheme of the embodiment of the present application, the battery pack 2 will generate a large amount of heat during operation, and the battery pack 2 has a large heat dissipation demand. The cooling medium in the cooling system 6 will bring the heat of the charging inverter 4 to the cooling container, and the condenser 901 in the temperature control system 8 will also generate a large amount of heat. Hot air usually floats upward. The condenser 901 and the cooling container are located above the battery pack 2 to alleviate the transfer of heat to the battery pack 2, so the heat dissipation capacity of the battery pack 2 can be increased to a certain extent. Furthermore, the cooling container and the condenser 901 are located above the fan 10, and the fan 10 blows upward. The wind generated acts on the cooling container and the condenser 901, which can discharge the heat of the cooling container and the condenser 901 upward, and the heat dissipation effect is better. If the cooling container is placed below the fan 10, the fan 10 blows downward, and the wind generated will move downward with the heat for a distance and then move upward, so that it will act on the cooling container and the condenser 901 again, and the heat dissipation effect is poor.

[0154] It is understandable that the embodiments of the present application are not limited to the cooling container and the condenser 901 being located above the battery pack 2. Exemplarily, the cooling container and / or the condenser 901 are located below the battery pack 2.

[0155] It is understandable that the embodiments of the present application are not limited to the cooling container and the condenser 901 being located above the fan 10. Exemplarily, the cooling container and / or the condenser 901 are located below or on the side of the fan 10.

[0156] In one embodiment, please refer to Figure 1 and Figure 2 , the energy storage device further includes a first circulation pump 11, and the cooling system 6 includes:

[0157] The first circulation loop 60, the first circulation pump 11 and the cooling channel of the charging converter 4 are all connected in series to the first circulation loop 60;

[0158] The sub-cooling system 61, the cooling channel of the charging connector 5 is arranged in the sub-cooling system 61, the sub-cooling system 61 includes a first pipeline 610, the first pipeline 610 is connected in series with the first circulation pump 11, the first pipeline 610 is connected in parallel with the cooling channel of the charging inverter 4, and the first heat dissipation device 7 is arranged in at least one of the first circulation loop 60 and the sub-cooling system 61 to cool the charging connector 5 and the charging inverter 4.

[0159] Exemplarily, the first circulation pump 11 is an electronic pump.

[0160] In the solution of the embodiment of the present application, the energy storage device also includes a first circulation pump 11, the cooling system 6 includes a first circulation loop 60 and a sub-cooling system 61, the sub-cooling system 61 includes a first pipeline 610, the charging converter 4 is arranged in the first circulation loop 60, and the first heat sink 7 is arranged in at least one of the first circulation loop 60 and the sub-cooling system 61. The charging converter 4 and the charging connector 5 are arranged on different pipelines, which can facilitate the arrangement of the cooling system 6, and the arrangement of the first circulation loop 60 and the sub-cooling system 61 can be free from the relative position of the charging converter 4 and the charging connector 5. After the first circulation loop 60 and the sub-cooling system 61 are arranged, the first heat sink 7 can cool the charging connector 5 and the charging converter 4. Furthermore, since the cooling temperatures of the charging connector 5 and the charging converter 4 are slightly different, the sub-cooling system 61 and the first circulation loop 60 can adjust the flow rates of different cooling media accordingly to meet different cooling requirements.

[0161] It is understandable that the embodiments of the present application are not limited to the cooling system 6 including the first circulation loop 60 and the sub-cooling system 61, the charging converter 4 is arranged in the first circulation loop 60, and the charging connector 5 is arranged in the sub-cooling system 61. Exemplarily, the cooling channel of the charging connector 5 is arranged in the first pipeline 610, and the cooling channel of the charging converter 4 is arranged in the first circulation loop 60.

[0162] In one embodiment, please refer to Figure 2The sub-cooling system 61 also includes a second heat exchanger 611, a second circulation pump 612 and a second circulation loop 613. One of the heat exchange channels of the second heat exchanger 611 is arranged in the first pipeline 610. The cooling channel of the charging connector 5, the second circulation pump 612 and another heat exchange channel of the second heat exchanger 611 are connected in series to the second circulation loop 613. The second circulation loop 613 is isolated from the first pipeline 610. The first heat dissipation device 7 is arranged in at least one of the first circulation loop 60, the heat exchange channel of the second heat exchanger 611 and the second circulation loop 613.

[0163] The second heat exchanger 611 is a heat exchanger capable of performing heat exchange between the first pipeline 610 and the second circulation loop 613 .

[0164] The second circulation loop 613 and the first pipeline 610 are isolated from each other, which means that the cooling medium in the first pipeline 610 will not flow into the second circulation loop 613 , and the cooling medium in the second circulation loop 613 will not flow into the first pipeline 610 .

[0165] In the solution of the embodiment of the present application, one heat exchange channel of the second heat exchanger 611 is set in the first pipeline 610, and the other heat exchange channel is connected in series to the second circulation loop 613, and the first pipeline 610 and the second circulation loop 613 are isolated from each other. The first circulation loop 60 and the second circulation loop 613 can be set with different cooling media according to the characteristics of the charging converter 4 and the charging connector 5, thereby increasing the adaptability of the energy storage device and providing a better user experience.

[0166] It is understandable that the embodiments of the present application are not limited to the isolation of the first pipeline 610 from the second circulation loop 613. Exemplarily, the second circulation loop 613 is interconnected with the first pipeline 610, and the charging connector 5 and the charging converter 4 are connected in parallel.

[0167] In one embodiment, the cooling medium in the first circulation loop 60 is water; and the cooling medium in the second circulation loop 613 is oil.

[0168] Exemplarily, the cooling medium in the first circulation loop 60 may also be a water-ethylene glycol solution.

[0169] Exemplarily, the cooling medium in the second circulation loop 613 is silicone oil.

[0170] In the solution of the embodiment of the present application, the cooling medium in the first circulation loop 60 is water. The cooling capacity required by the charging converter 4 is relatively high. The specific heat capacity of water is relatively large, and the charging converter 4 can be cooled well to better meet the cooling demand of the charging converter 4. The cooling medium in the second circulation loop 613 is oil. Oil has the property of being difficult to conduct electricity. The energy storage device needs to discharge through the charging connector 5. In the process of cooling the charging connector 5, the risk of electric shock or short circuit caused by leakage of the cooling medium is alleviated, and the energy storage device is safer.

[0171] It is understandable that the embodiment of the present application is not limited to the cooling medium in the first circulation loop 60 being water and the cooling medium in the second circulation loop 613 being oil. Exemplarily, the cooling medium in both the first circulation loop 60 and the second circulation loop 613 is water.

[0172] In one embodiment, please refer to Figure 3 The temperature control system 8 includes a third circulation loop 80 and a third circulation pump 81 . The temperature control flow channel of the battery pack 2 and the third circulation pump 81 are connected in series to the third circulation loop 80 . The second heat dissipation device 9 is arranged in the third circulation loop 80 .

[0173] Exemplarily, the first heat exchanger 91 includes a temperature regulating pipeline and heat exchange fins that are interconnected. The temperature regulating pipeline is arranged in the heat dissipation channel, and the heat exchange fins perform heat exchange with the evaporator 903 to dissipate heat.

[0174] In the solution of the embodiment of the present application, the second heat dissipation device 9 is arranged in the third circulation loop 80. The temperature requirement of the temperature control medium of the battery pack 2 is lower than the ambient temperature. The second heat dissipation device 9 can better reduce the temperature of the temperature control medium in the temperature control flow channel of the battery pack 2 to a more suitable temperature.

[0175] In one embodiment, the energy storage device also includes an energy storage inverter 3, which is electrically connected to the battery pack 2 and the energy storage interface respectively to convert the electric energy input or output of the battery pack 2, and the temperature control system 8 also includes a second pipeline 82, the second pipeline 82 is connected in parallel with the temperature control flow channel of the battery pack 2, the second pipeline 82 is connected in series with the third circulation pump 81, and the temperature control flow channel of the energy storage inverter 3 is arranged in the second pipeline 82.

[0176] In the solution of the embodiment of the present application, the second pipeline 82 is connected in parallel with the temperature regulating flow channel of the battery pack 2, the second pipeline 82 is connected in series with the third circulating pump 81, and the temperature regulating flow channel of the energy storage converter 3 is arranged in the second pipeline 82. The required temperature of the cooling medium of the energy storage converter 3 is slightly different from the required temperature of the cooling medium of the battery pack 2. The second pipeline 82 is connected in parallel with the temperature regulating flow channel of the battery pack 2, and the flow rate of the cooling medium in the second pipeline 82 and the temperature regulating flow channel of the battery pack 2 can be adaptively adjusted according to the actual temperature regulation requirements.

[0177] It is understandable that the embodiments of the present application do not limit whether the energy storage device includes the energy storage converter 3. Exemplarily, the energy storage converter 3 can be arranged on the grid side, and the grid is converted into direct current through the energy storage converter 3 and enters the battery pack.

[0178] It is understandable that the present application does not limit the temperature adjustment method of the energy storage converter 3. Exemplarily, the temperature adjustment flow channel of the energy storage converter 3 is arranged in the third circulation loop 80.

[0179] In one embodiment, the energy storage device further includes a valve 12 , and the valve 12 and the temperature regulating flow channel of the energy storage converter 3 are connected in series to the second pipeline 82 .

[0180] Exemplarily, the valve 12 is an electronic valve 12 .

[0181] Exemplarily, when the valve 12 is in an open state, the temperature regulating channel of the energy storage converter 3 is connected to the third circulation loop 80. When the valve 12 is in a closed state, the temperature regulating channel of the energy storage converter 3 is cut off from the third circulation loop 80.

[0182] In the solution of the embodiment of the present application, the energy storage device further includes a valve 12, which is connected in series with the temperature regulating flow channel of the energy storage converter 3. During the process of the energy storage device charging the external electrical equipment, the energy storage converter 3 is in a dormant device, and there is no need to regulate the temperature of the energy storage converter 3. Closing the valve 12 can cut off the cooling medium from flowing to the energy storage converter 3, so that the second heat dissipation device 9 and the temperature regulating system 8 can fully act on the battery pack 2 to improve the temperature regulating effect.

[0183] It is understandable that the embodiments of the present application do not limit whether the valve 12 is provided.

[0184] It is understandable that when the energy storage device is not provided with the energy storage converter 3 , the energy storage device may not be provided with the valve 12 , and the temperature control system 8 only controls the temperature of the battery pack 2 .

[0185] In one embodiment, the temperature adjustment system 8 further includes a heater 83 , and the heater 83 is disposed in the third circulation loop 80 .

[0186] Exemplarily, the heater 83 is a heating resistor.

[0187] In the solution of the embodiment of the present application, the temperature control system 8 also includes a heater 83 arranged in the third circulation loop 80. The working performance of the battery pack 2 will be affected to a certain extent in a low temperature environment. The heater 83 can heat the third circulation loop 80 to increase the temperature of the battery pack 2, thereby ensuring the normal operation of the battery pack 2 to a certain extent.

[0188] It is understandable that the embodiments of the present application do not limit whether the heater 83 is provided.

[0189] In one embodiment, the charging converter 4 is located inside the cabinet 1 .

[0190] In the solution of the embodiment of the present application, the charging converter 4 is located inside the cabinet 1, which can alleviate the influence of the external environment on the charging converter 4 and is more convenient in the process of transferring the energy storage device.

[0191] It is understandable that the embodiments of the present application are not limited to the charging converter 4 being located inside the cabinet 1. Exemplarily, the charging converter 4 is disposed outside the cabinet 1.

[0192] In one embodiment, the charging connector 5 is partially located outside the cabinet 1 .

[0193] In the solution of the embodiment of the present application, the charging connector 5 is partially located outside the cabinet 1, which can facilitate the user to move the charging connector 5 to charge the electrical device.

[0194] In one embodiment, the charging converter 4 is a DC converter.

[0195] A DC converter is a converter whose input current and output current are both direct current.

[0196] In the solution of the embodiment of the present application, since the current new energy vehicles and other electrical equipment are mostly charged with direct current, the current output by the battery pack 2 can adjust the current parameters through the direct current converter, so as to adapt to the input current parameters of more electrical equipment. The energy storage device has high adaptability.

[0197] Exemplarily, the energy storage converter 3 is an AC converter.

[0198] Exemplarily, the energy storage device also includes multiple temperature and pressure sensors, and temperature and pressure sensors are provided on the temperature control channel of the battery pack 2, the temperature control channel of the energy storage inverter 3, the cooling channel of the charging inverter 4 and the cooling channel of the charging connector 5.

[0199] The embodiment of the present application also provides a temperature control method for an energy storage device, see Figures 6 to 12 ,include:

[0200] Step S1: Acquire the working mode of the energy storage device, and the temperature adjustment object corresponding to each working mode includes at least a battery pack;

[0201] Step S2: at least start the temperature control system according to the working mode.

[0202] Exemplarily, the temperature control system is used to perform heat exchange with the energy storage inverter 3 and the battery pack 2, the cooling system 6 and the temperature control system 8 are thermally separated, the cooling system 6 is used to perform heat exchange with the charging inverter 4 and the charging connector 5, the first heat dissipation device 7 is arranged in the cooling system 6, the second heat dissipation device 9 is arranged in the temperature control system 8, the energy storage inverter 3 is electrically connected to the battery pack 2 and the energy storage interface respectively, and the charging inverter 4 is electrically connected to the battery pack 2 and the charging connector 5 respectively. When the working mode is the first working mode of charging the battery pack 2, the cooling system 6 is in a closed state and the temperature control system 8 is in an open state, when the working mode is the second working mode of the battery pack 2 discharging to the charging connector 5 through the charging inverter 4, the cooling system 6 and the temperature control system 8 are both in an open state, and when the working mode is the sleep mode, the cooling system 6 is in a closed state and the temperature control system 8 is in an open state.

[0203] The sleep mode refers to a working mode in which the battery pack 2 , the charging converter 4 and the charging connector 5 are all in a closed state.

[0204] In the scheme of the embodiment of the present application, at least the temperature control system 8 is started according to the working mode, and the charging converter 4, the charging connector 5 and the battery pack 2 can be temperature controlled according to the actual requirements of the working mode. During the operation of the energy storage device, there is a situation where the charging converter 4 and the battery pack 2 need to be cooled. Since the temperature difference between the charging converter 4 and the battery pack 2 in the actual application scenario is large, the first heat sink 7 and the second heat sink 9 can be adjusted according to different heat dissipation requirements through the cooling system 6 and the temperature control system 8, respectively, so as to make full use of the heat sink in the energy storage device for cooling the charging converter 4 and the battery pack 2. Furthermore, the cooling system 6 is cooled by the first heat sink 7, and the temperature control system 8 is temperature controlled by the second heat sink 9. The temperature control fluid in the cooling system 6 and the temperature control fluid in the temperature control system 8 can have a large temperature difference, so that the energy storage device can reduce energy consumption while basically meeting the overall temperature control requirements.

[0205] In one embodiment, please refer to Figure 8 The working mode is a first working mode for charging the battery pack 2. According to the working mode, at least the temperature adjustment system 8 is started, including:

[0206] Step S20: starting the temperature control system and the refrigerator of the second heat dissipation device while the cooling system remains closed.

[0207] In the solution of the embodiment of the present application, during the charging process of the battery pack 2, the battery pack 2 generates a large amount of heat during operation, and the required temperature of the cooling medium of the battery pack 2 is lower than the ambient temperature. By starting the refrigerator 90 and the third circulation pump 81, the battery pack 2 can be cooled well.

[0208] In one embodiment, please refer to Fig. 9 The temperature control object corresponding to the first working mode also includes the energy storage converter 3. When the cooling system 6 remains closed, the temperature control system 8 and the refrigerator 90 of the second heat dissipation device 9 are started, including:

[0209] Step S200: while the cooling system remains closed, the compressor in the refrigerator of the second heat dissipation device is started to cool the third circulation loop of the temperature control system;

[0210] Step S201: Start the third circulation pump in the temperature control system while the cooling system remains closed.

[0211] Exemplarily, the temperature control channel of the battery pack 2 and the third circulation pump 81 are connected in series to the third circulation loop 80 of the temperature control system 8, the second heat dissipation device 9 is arranged in the third circulation loop 80, the temperature control channel of the energy storage inverter 3 is arranged in the second pipeline 82 of the temperature control system 8, the second pipeline 82 is connected in parallel with the temperature control channel of the battery pack 2, and the second pipeline 82 is connected in series with the third circulation pump 81.

[0212] In the solution of the embodiment of the present application, the second pipeline 82 is connected in parallel with the temperature control channel of the battery pack 2, and the flow rate of the cooling medium in the second pipeline 82 and the temperature control channel of the battery pack 2 can be adaptively adjusted according to actual temperature control requirements.

[0213] It is understandable that the present application does not limit the temperature adjustment method of the energy storage converter 3. Exemplarily, the temperature adjustment flow channel of the energy storage converter 3 is arranged in the third circulation loop 80.

[0214] In one embodiment, please refer to Fig. 9 , starting the temperature control system 8 and the refrigerator 90 of the second heat dissipation device 9 while the cooling system 6 remains closed, further comprising:

[0215] Step S202: Opening a valve disposed in the temperature control system while the cooling system remains closed.

[0216] By way of example, the valve 12 and the temperature control channel of the energy storage converter 3 are connected in series to the second pipeline 82 in the temperature control system 8 .

[0217] In the embodiment of the present application, a valve 12 is provided in the second pipeline 82 of the temperature control system 8. The valve 12 can be closed to cut off the cooling medium from flowing through the temperature control flow channel of the energy storage converter 3, so that when the energy storage converter 3 does not need to be temperature controlled, the temperature control pressure of the second heat dissipation device 9 on the temperature control system 8 is relieved, thereby reducing energy consumption to a certain extent.

[0218] It is understandable that the present application does not limit whether the valve 12 is provided in the second pipeline 82 .

[0219] In one embodiment, please refer to Figure 8The working mode is a second working mode in which the battery pack 2 discharges to the charging connector 5 through the charging converter 4. The temperature adjustment object corresponding to the second working mode also includes the charging connector 5 and the charging converter 4. At least the temperature adjustment system 8 is started according to the working mode, including:

[0220] Step S21: start the cooling system, the temperature control system and the refrigerator of the second heat dissipation device.

[0221] In the solution of the embodiment of the present application, during the process of charging and discharging the battery pack 2 through the charging converter 4, the charging connector 5, the charging converter 4 and the battery pack 2 are all in working state and generate a certain amount of heat. According to actual use requirements, the required temperature of the cooling medium of the charging connector 5 is similar to the required temperature of the cooling medium of the charging converter 4. The temperature can be adjusted well through the cooling system 6, the temperature control system 8 and the refrigerator 90.

[0222] In one embodiment, please refer to Fig.10 The temperature adjustment object corresponding to the second working mode also includes the energy storage converter 3, and the refrigerator 90 of the cooling system 6, the temperature adjustment system 8 and the second heat dissipation device 9 is started, including:

[0223] Step S210: starting a first circulation pump and a second circulation pump of a cooling system to cool the charging converter and the charging connector;

[0224] Step S211: starting the compressor in the refrigerator of the second heat dissipation device to cool the third circulation loop of the temperature control system;

[0225] Step S212: Start the third circulation pump in the temperature control system.

[0226] Exemplarily, the heat dissipation channel corresponding to the second heat dissipation device 9, the temperature control channel of the battery pack 2 and the third circulation pump 81 are connected in series to the third circulation loop 80 of the temperature control system 8, the temperature control channel of the energy storage inverter 3 is arranged in the second pipeline 82 of the temperature control system 8, the second pipeline 82 is connected in parallel with the temperature control channel of the battery pack 2, and the second pipeline 82 is connected in series with the third circulation pump 81.

[0227] In the solution of the embodiment of the present application, the required temperature of the cooling medium of the battery pack 2 is similar to the required temperature of the cooling medium of the energy storage converter 3. The battery pack 2 and the energy storage converter 3 share the temperature control system 8, which can better utilize the heat dissipation capacity of the heat dissipation system and the second heat dissipation device 9.

[0228] In one embodiment, please refer to Fig.10 , start the cooling system 6, the temperature adjustment system 8 and the refrigerator 90 of the second heat dissipation device 9, and also include:

[0229] Step S213: Open the valve provided in the temperature control system 8.

[0230] By way of example, the valve 12 and the temperature control channel of the energy storage converter 3 are connected in series to the second pipeline 82 in the temperature control system 8 .

[0231] In the solution of the embodiment of the present application, a valve 12 is provided in the second pipeline 82 of the temperature control system 8. The valve 12 can be closed to cut off the cooling medium from flowing through the temperature control flow channel of the energy storage converter 3, so that when the energy storage converter 3 does not need to be temperature controlled, the temperature control pressure of the second heat dissipation device 9 on the temperature control system 8 is relieved, thereby reducing energy consumption to a certain extent.

[0232] It is understandable that the embodiments of the present application are not limited to starting the first circulating pump 11, the second circulating pump 612, the refrigerator 90, the third circulating pump 81 and the valve 12 to cool the charging converter 4, the charging connector 5, the battery pack 2 and the energy storage converter 3. Exemplarily, the battery pack 2 and the energy storage converter 3 are both arranged in the cooling system 6. The charging converter 4, the charging connector 5, the battery pack 2 and the energy storage converter 3 are cooled by starting the first circulating pump 11 and the second circulating pump 612.

[0233] In one embodiment, please refer to Figure 8 , the working mode is the sleep mode, and at least the temperature adjustment system 8 is started according to the working mode, including:

[0234] Step S22: Start the temperature control system while the cooling system remains closed.

[0235] The sleep mode refers to a working mode in which the battery pack 2 , the charging converter 4 and the charging connector 5 are all in a closed state.

[0236] Exemplarily, when the energy storage device includes the energy storage converter 3 and the energy storage device is in a sleep mode, the energy storage converter 3 is also in a closed state.

[0237] In the solution of the embodiment of the present application, when the working mode is the sleep mode, the cooling system 6 is turned off and the temperature control system 8 is started. When the working mode is the sleep mode, the battery pack 2, the charging connector 5 and the charging converter 4 are not working, but the battery pack 2 has certain temperature requirements during the startup process, and the battery pack 2 is at an inappropriate temperature for a long time, which will affect the service life of the battery pack 2. By starting the temperature control system 8, the battery pack 2 can be adjusted to a suitable temperature.

[0238] In one embodiment, please refer to Fig.11 , starting the temperature control system 8 while the cooling system 6 remains closed, including:

[0239] Step S220: starting the third circulation pump in the temperature control system while the cooling system remains closed;

[0240] Step S221: closing the valve provided in the temperature control system while the cooling system remains closed.

[0241] Exemplarily, the temperature regulating flow channel of the battery pack 2 and the third circulation pump 81 are connected in series to the third circulation loop 80 of the temperature regulating system 8 , and the second heat dissipation device is arranged in the third circulation loop 80 .

[0242] Exemplarily, the valve 12 and the temperature regulating channel of the energy storage converter 3 are connected in series to the second pipeline 82 in the temperature regulating system 8 , the second pipeline 82 is connected in parallel to the temperature regulating channel of the battery pack 2 , and the second pipeline 82 is connected in series to the third circulation pump 81 .

[0243] In the solution of the embodiment of the present application, when the working mode is the sleep mode, the cooling system 6 is turned off and the temperature control system 8 is started. When the working mode is the sleep mode, the battery pack 2, the charging connector 5 and the charging converter 4 are not working, but the battery pack 2 has certain temperature requirements during the startup process, and the battery pack 2 is at an inappropriate temperature for a long time, which will affect the service life of the battery pack 2. By starting the temperature control system 8, the battery pack 2 can be adjusted to a suitable temperature.

[0244] In one embodiment, please refer to Figure 1 ,2. The temperature control method also includes:

[0245] Step S23: while the cooling system remains closed, the compressor in the refrigerator of the second heat dissipation device is started to cool the third circulation loop of the temperature control system.

[0246] In the solution of the embodiment of the present application, when the ambient temperature is greater than the normal starting temperature of the battery pack 2, the compressor 900 in the refrigerator 90 of the second heat dissipation device 9 can be started to cool so that the temperature of the battery pack 2 is close to the normal operating temperature.

[0247] In one embodiment, please refer to Fig.12 , the temperature adjustment method also includes:

[0248] Step S24: while the cooling system remains closed, the heater provided in the third circulation loop is started to heat the third circulation loop of the temperature control system.

[0249] In the solution of the embodiment of the present application, when the ambient temperature is lower than the normal starting temperature of the battery pack 2, the heater 83 arranged in the third circulation loop 80 can be started to heat the cooling medium in the third circulation loop 80 so that the temperature of the battery pack 2 is close to the normal operating temperature.

[0250] It is understandable that the embodiment of the present application does not limit the working state of the third circulation pump 81 when the working mode is in the sleep mode. The third circulation pump 81 can be in an open state or in a closed state.

[0251] In one embodiment, please refer to Figure 6 , the temperature adjustment method also includes:

[0252] Step S3: Start the fan to dissipate heat.

[0253] Exemplarily, the fan 10 is installed in the cabinet 1 .

[0254] In the solution of the embodiment of the present application, by starting the fan 10 to dissipate heat to the first heat dissipation device 7 and the second heat dissipation device 9, the air can be driven to flow quickly, thereby quickly bringing the heat in the energy storage device out of the cabinet 1, and the heat dissipation capacity of the energy storage device is relatively high.

[0255] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An energy storage device, characterized in that: The energy storage device has at least a first working mode, a second working mode and a sleep mode, including: The cabinet has an energy storage interface; A battery pack is installed in the cabinet, and the battery pack is electrically connected to the energy storage interface; a charging converter, electrically connected to the battery pack to convert electrical energy input or output by the battery pack; a charging connector, electrically connected to the charging converter to transmit the electric energy converted by the charging converter; a cooling system, configured to perform heat exchange with the charging converter and the charging connector; A first heat dissipation device, arranged in the cooling system; A temperature control system, used for performing heat exchange with the battery pack, wherein the cooling system and the temperature control system are thermally separated; A second heat dissipation device, arranged in the temperature control system; A controller is used to keep the cooling system closed and start the temperature control system in the first working mode, the controller is used to start the cooling system and the temperature control system in the second working mode, and the controller is used to keep the cooling system closed and start the temperature control system in the sleep mode; the battery pack is charged in the first working mode, and the battery pack discharges to the charging connector through the charging inverter in the second working mode, and the battery pack, the charging inverter and the charging connector do not work in the sleep mode.

2. The energy storage device according to claim 1, characterized in that: The first heat dissipation device is a cooling container for accommodating a cooling medium. The space in the cooling container for accommodating a cooling medium is arranged in the cooling system. The cooling container exchanges heat with the air. The second heat dissipation device includes a refrigerator and a first heat exchanger. The first heat exchanger is arranged across the refrigerator and the temperature control system.

3. The energy storage device according to claim 2, characterized in that: The refrigerator comprises a compressor, a condenser, an expansion valve and an evaporator which are connected end to end in sequence, and the first heat exchanger is arranged across the evaporator and the temperature control system.

4. The energy storage device according to claim 3, characterized in that: The energy storage device also includes at least one fan, which is installed on the cabinet and is used to dissipate heat for the condenser and the cooling container. When projected along the air outlet direction of the fan, the projection area of ​​the condenser and the projection area of ​​the cooling container are staggered.

5. The energy storage device according to claim 4, characterized in that: Projected along the air outlet direction of the fans, the projection area of ​​each fan spans the projection area of ​​the condenser and the projection area of ​​the cooling container.

6. The energy storage device according to claim 4, characterized in that: The condenser and the cooling container are both located above the battery pack, and / or the condenser and the cooling container are both located above the fan.

7. The energy storage device according to any one of claims 1 to 6, characterized in that: The energy storage device further includes a first circulation pump, and the cooling system includes: a first circulation loop, wherein the first circulation pump and a cooling channel of the charging converter are both connected in series to the first circulation loop; A sub-cooling system, wherein the cooling channel of the charging connector is arranged in the sub-cooling system, the sub-cooling system comprises a first pipeline, the first pipeline is connected in series with the first circulation pump, the first pipeline is connected in parallel with the cooling channel of the charging inverter, and the first heat dissipation device is arranged in at least one of the first circulation loop and the sub-cooling system to cool the charging connector and the charging inverter.

8. The energy storage device according to claim 7, characterized in that: The sub-cooling system also includes a second heat exchanger, a second circulation pump and a second circulation loop, one of the heat exchange channels of the second heat exchanger is arranged in the first pipeline, the cooling channel of the charging connector, the second circulation pump and another heat exchange channel of the second heat exchanger are connected in series to the second circulation loop, the second circulation loop is isolated from the first pipeline, and the first heat dissipation device is arranged in at least one of the first circulation loop, the heat exchange channel of the second heat exchanger and the second circulation loop.

9. The energy storage device according to any one of claims 1 to 6, characterized in that: The temperature control system includes a third circulation loop and a third circulation pump. The temperature control flow channel of the battery pack and the third circulation pump are connected in series to the third circulation loop. The second heat dissipation device is arranged in the third circulation loop.

10. The energy storage device according to claim 9, characterized in that: The energy storage device also includes an energy storage inverter, which is electrically connected to the battery pack and the energy storage interface respectively to convert the electric energy input or output of the battery pack. The temperature control system also includes a second pipeline, which is connected in parallel with the temperature control flow channel of the battery pack, and the second pipeline is connected in series with the third circulation pump. The temperature control flow channel of the energy storage inverter is arranged in the second pipeline.

11. The energy storage device according to claim 10, characterized in that: The energy storage device further comprises a valve, and the valve and the temperature regulating flow channel of the energy storage converter are connected in series to the second pipeline.

12. The energy storage device according to claim 9, characterized in that: The temperature control system further comprises a heater, and the heater is arranged in the third circulation loop.

13. A temperature control method for energy storage equipment, characterized in that: include: Acquire the working mode of the energy storage device, wherein the temperature adjustment object corresponding to each working mode includes at least a battery pack; At least the temperature control system is started according to the working mode, and the temperature control system is used to perform heat exchange with the battery pack. The cooling system and the temperature control system are thermally separated, and the cooling system is used to perform heat exchange with the charging inverter and the charging connector. A first heat dissipation device is arranged in the cooling system, and a second heat dissipation device is arranged in the temperature control system. The charging inverter is electrically connected to the battery pack and the charging connector, respectively. When the working mode is a first working mode for charging the battery pack, the cooling system is in a closed state and the temperature control system is in an open state. When the working mode is a second working mode for discharging the battery pack to the charging connector through the charging inverter, the cooling system and the temperature control system are both in an open state. When the working mode is a sleep mode, the cooling system is in a closed state and the temperature control system is in an open state.

14. The temperature adjustment method according to claim 13, characterized in that: The working mode is a first working mode for charging the battery pack, and at least starting a temperature control system according to the working mode includes: The temperature control system and the refrigerator of the second heat dissipation device are started while the cooling system remains closed.

15. The temperature adjustment method according to claim 14, characterized in that: The temperature adjustment object corresponding to the first working mode also includes an energy storage converter, and starting the temperature adjustment system and the refrigerator of the second heat dissipation device while the cooling system remains closed includes: When the cooling system remains closed, starting the compressor in the refrigerator of the second heat dissipation device to cool the third circulation loop of the temperature control system; While the cooling system remains closed, the third circulation pump in the temperature control system is started, the temperature control flow channel of the battery pack and the third circulation pump are connected in series to the third circulation loop of the temperature control system, the second heat dissipation device is arranged in the third circulation loop, the temperature control flow channel of the energy storage inverter is arranged in the second pipeline of the temperature control system, the second pipeline is connected in parallel with the temperature control flow channel of the battery pack, and the second pipeline is connected in series with the third circulation pump.

16. The temperature control method according to claim 15, characterized in that: The method further comprises: starting the temperature control system and the refrigerator of the second heat dissipation device while the cooling system remains closed. The valve provided in the temperature control system is opened while the cooling system remains closed, and the valve and the temperature control flow channel of the energy storage converter are connected in series to a second pipeline in the temperature control system.

17. The temperature adjustment method according to claim 13, characterized in that: The working mode is a second working mode in which the battery pack discharges to the charging connector through the charging converter. The temperature adjustment object corresponding to the second working mode also includes the charging connector and the charging converter. At least the temperature adjustment system is started according to the working mode, including: The cooling system, the temperature adjustment system and the refrigerator of the second heat dissipation device are started.

18. The temperature adjustment method according to claim 17, characterized in that: The temperature adjustment object corresponding to the second working mode also includes an energy storage converter, and starting the cooling system, the temperature adjustment system and the refrigerator of the second heat dissipation device includes: Starting a first circulation pump and a second circulation pump of the cooling system to cool the charging inverter and the charging connector; Starting the compressor in the refrigerator of the second heat dissipation device to cool the third circulation loop of the temperature control system; The third circulation pump in the temperature control system is started, the temperature control flow channel of the battery pack and the third circulation pump are connected in series to the third circulation loop of the temperature control system, the second heat dissipation device is arranged in the third circulation loop, the temperature control flow channel of the energy storage inverter is arranged in the second pipeline of the temperature control system, the second pipeline is connected in parallel with the temperature control flow channel of the battery pack, and the second pipeline is connected in series with the third circulation pump.

19. The temperature control method according to claim 18, characterized in that: The cooling system, the temperature control system and the refrigerator of the second heat dissipation device are started, and further include: The valve provided in the temperature control system is opened, and the valve and the temperature control flow channel of the energy storage converter are connected in series to the second pipeline in the temperature control system.

20. The temperature adjustment method according to claim 13, characterized in that: The working mode is a sleep mode, and at least a temperature control system is started according to the working mode, including: The temperature control system is started while the cooling system remains closed.

21. The temperature control method according to claim 20, characterized in that: Starting the temperature control system while the cooling system remains closed comprises: The third circulation pump in the temperature control system is started while the cooling system remains closed, the temperature control flow channel of the battery pack and the third circulation pump are connected in series to the third circulation loop of the temperature control system, and the second heat dissipation device is arranged in the third circulation loop; When the cooling system remains closed, the valve arranged in the temperature control system is closed, the valve and the temperature control flow channel of the energy storage inverter are connected in series to the second pipeline in the temperature control system, the second pipeline is connected in parallel with the temperature control flow channel of the battery pack, and the second pipeline is connected in series with the third circulation pump.

22. The temperature control method according to claim 21, characterized in that: The temperature adjustment method further comprises: The compressor in the refrigerator of the second heat dissipation device is started to refrigerate the third circulation loop of the temperature control system while the cooling system remains closed.

23. The temperature control method according to claim 21, characterized in that: The temperature adjustment method further comprises: The heater provided in the third circulation loop is started while the cooling system is kept closed to heat the third circulation loop of the temperature control system.

24. The temperature control method according to any one of claims 13 to 23, characterized in that: The temperature adjustment method further comprises: Start the fan for cooling.

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