Energy storage device and temperature regulation method for energy storage device

Abstract

Embodiments of the present disclosure relate to the technical field of batteries, and provide an energy storage device and a temperature regulation method for an energy storage device. A battery pack mounted within a cabinet body is electrically connected to an energy storage interface. A charging converter is electrically connected to the battery pack. A charging connector is electrically connected to the charging converter. A cooling system is used for exchanging heat with the charging converter and the charging connector. A first heat dissipation apparatus is disposed in the cooling system. A temperature regulation system is used for exchanging heat with the battery pack, and the cooling system and the temperature regulation system are thermally separated. A second heat dissipation apparatus is disposed in the temperature regulation system. A controller is used for keeping the cooling system off and starting the temperature regulation system in a first working mode. The controller is used for starting the cooling system and the temperature regulation system in a second working mode. The controller is used for keeping the cooling system off and starting the temperature regulation system in a sleep mode.

Description

An energy storage device and a temperature regulation method for the energy storage device.

[0001] Cross-references to related applications

[0002] This disclosure is based on and claims priority to Chinese Patent Application No. 202410970505.4, filed on July 19, 2024, entitled “An Energy Storage Device and a Temperature Regulation Method for an Energy Storage Device”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to the field of battery technology, and more specifically to an energy storage device and a temperature regulation method for the energy storage device. Background Technology

[0004] The application of new energy batteries in daily life and industry is becoming increasingly widespread. For example, new energy vehicles equipped with batteries are already widely used. In addition, batteries are increasingly being used in energy storage. The battery pack is installed in the energy storage device and charges electrical devices such as new energy vehicles through the charging connector. The charging inverter, charging connector and battery pack in the energy storage device will generate heat, which requires a certain degree of cooling.

[0005] In related technologies, the structures used to regulate the temperature of charging connectors, charging converters, and battery packs within energy storage devices are difficult to adapt to the temperature regulation requirements of energy storage devices under different operating modes.

[0006] Summary of the Invention

[0007] In view of this, the present disclosure aims 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 under different operating modes.

[0008] To achieve the above objectives, the technical solution of this disclosure embodiment is implemented as follows:

[0009] A first aspect of this disclosure provides an energy storage device, the energy storage device having at least a first operating mode, a second operating mode, and a hibernation mode, the energy storage device comprising:

[0010] The cabinet has an energy storage interface;

[0011] The battery pack is installed inside the cabinet and is electrically connected to the energy storage interface.

[0012] A charging converter is electrically connected to a battery pack to convert the electrical energy input or output of the battery pack.

[0013] The charging connector is electrically connected to the charging converter to transmit the electrical energy converted by the charging converter.

[0014] Cooling system for heat exchange with charging inverter and charging connector;

[0015] The first heat dissipation device is installed in the cooling system;

[0016] The temperature control system is used for heat exchange with the battery pack, and the cooling system and temperature control system are thermally separated.

[0017] The second heat dissipation device is installed in the temperature control system;

[0018] The controller is used to keep the cooling system off and start the temperature control system in the first operating mode, the controller is used to start the cooling system and the temperature control system in the second operating mode, and the controller is used to keep the cooling system off and start the temperature control system in the hibernation mode.

[0019] In the embodiments of this disclosure, the cooling system and the temperature control system are thermally separated. The cooling system is used for heat exchange with the charging converter and the charging connector, while the temperature control system is used for heat exchange with the battery pack. During the charging process of the battery pack, the battery pack is working, but the charging connector and the charging converter are not working. The cooling system can be turned off and the temperature control system can be turned on to regulate the temperature of the battery pack. During the process of the charging connector transmitting the electrical energy transmitted by the charging converter, the battery pack, the charging connector, and the charging converter are all working. The cooling system and the temperature control system can be turned on to regulate the temperature of the battery pack, the charging connector, and the charging converter, thereby adapting to the temperature regulation of different objects under different working modes of the energy storage device.

[0020] In one embodiment, the first heat dissipation device is a cooling container for containing a cooling medium. The space inside the cooling container for containing the cooling medium is provided 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, which is connected across the refrigerator and the temperature control system.

[0021] In this embodiment, the charging converter is cooled by a cooling container, and the refrigerator cools the iodine level. The charging converter and the battery pack have significantly different temperature requirements for the cooling medium. Since the maximum allowable temperature of the temperature-regulating fluid required for the charging converter and the charging connector is higher than the ambient temperature, the ambient airflow through the cooling container effectively cools the container, thus meeting the cooling requirements of the charging connector and the charging converter and reducing energy consumption. The temperature of the temperature-regulating fluid required for the battery pack is lower than the ambient temperature. The refrigerator lowers the temperature of the temperature-regulating fluid in the temperature control system to below the ambient temperature, better meeting the temperature control requirements of the battery pack.

[0022] In one embodiment, the refrigeration unit includes a compressor, a condenser, an expansion valve, and an evaporator connected in sequence, with a first heat exchanger spanning the evaporator and the temperature control system.

[0023] In the embodiments of this disclosure, the refrigerator includes a compressor, a condenser, an expansion valve, and an evaporator. The condenser can quickly reduce the temperature of the temperature-regulating medium, thereby allowing the battery pack to operate in a more suitable environment.

[0024] In one embodiment, the energy storage device further includes at least one fan, which is installed in the cabinet and is used to dissipate heat from the condenser and the cooling container. The projection area of ​​the condenser and the projection area of ​​the cooling container are offset from each other along the air outlet direction of the fan.

[0025] In the embodiments of this disclosure, the projection area of ​​the condenser and the projection area of ​​the first heat dissipation device are offset from each other along the air outlet direction of the fan. During the airflow driven by the fan, the heat generated by the condenser and the first heat dissipation device has minimal interaction, thus increasing the fan's heat dissipation effect to a certain extent.

[0026] In one embodiment, the projection area of ​​each fan spans the projection area of ​​the condenser and the projection area of ​​the cooling container, along the air outlet direction of the fan.

[0027] In this embodiment of the scheme, the projection area of ​​the fan spans across the projection areas of the condenser and the cooling container. During the process of the fan dissipating heat from the condenser and cooling container, the flowing air carrying heat from the condenser is less likely to repeatedly affect the cooling container, thereby mitigating the mutual interference between the condenser and cooling container.

[0028] In one embodiment, both the condenser and the cooling container are located above the battery pack, and / or both the condenser and the cooling container are located above the fan.

[0029] In the embodiments of this disclosure, the battery pack generates a large amount of heat during operation, requiring significant heat dissipation. The cooling medium in the cooling system carries the heat from the charging converter to the cooling container, and the condenser in the temperature control system also generates a large amount of heat. Since hot air typically rises, the condenser and cooling container being positioned above the battery pack can mitigate heat transfer, thus increasing the battery pack's heat dissipation capacity to some extent. Furthermore, with the cooling container and condenser located above the fan, the upward-blowing airflow acts on the cooling container and condenser, effectively removing heat upwards and resulting in better heat dissipation. If the cooling container is placed below the fan, which blows downwards, the airflow carrying heat will move downwards for a distance before rising again, thus acting on the cooling container and condenser, leading to poorer heat dissipation.

[0030] In one embodiment, the energy storage device further includes a first circulation pump, and the cooling system includes:

[0031] The first circulation loop, the first circulation pump and the cooling channel of the charging converter are all connected in series in the first circulation loop;

[0032] The sub-cooling system includes a cooling channel for the charging connector, a first pipeline connected in series with a first circulating pump, and a parallel connection between the first pipeline and the cooling channel of the charging converter. A first heat dissipation device is provided in at least one of the first circulating loop and the sub-cooling system to cool the charging connector and the charging converter.

[0033] In the embodiments of this disclosure, the energy storage device further includes a first circulating pump, and the cooling system includes a first circulating loop and a sub-cooling system. The sub-cooling system includes a first pipeline. A charging converter is disposed in the first circulating loop, and a first heat dissipation device is disposed in at least one of the first circulating loop and the sub-cooling system. The charging converter and the charging connector are disposed on different pipelines, which facilitates the arrangement of the cooling system. The arrangement of the first circulating loop and the sub-cooling system is not limited by the relative positions of the charging converter and the charging connector. After the first circulating 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 circulating loop can adjust the flow rates of different cooling media accordingly to meet different cooling requirements.

[0034] In one embodiment, the sub-cooling system further includes a second heat exchanger, a second circulating pump, and a second circulating loop. One heat exchange channel of the second heat exchanger is disposed in the first pipeline. The cooling channel of the charging connector, the second circulating pump, and the other heat exchange channel of the second heat exchanger are connected in series in the second circulating loop. The second circulating loop is isolated from the first pipeline. The first heat dissipation device is disposed in at least one of the first circulating loop, the heat exchange channel of the second heat exchanger, and the second circulating loop.

[0035] In this embodiment of the scheme, one heat exchange channel of the second heat exchanger is disposed in the first pipeline, and the other heat exchange channel is connected in series in the second circulation loop. The first pipeline and the second circulation loop are isolated from each other. The first circulation loop and the second circulation loop can be configured 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 improving the user experience.

[0036] In one embodiment, the temperature control system includes a third circulation loop and a third circulation pump, the temperature control channel of the battery pack and the third circulation pump are connected in series in the third circulation loop, and the second heat dissipation device is disposed in the third circulation loop.

[0037] In the embodiment of this disclosure, the second heat dissipation device is disposed in the third circulation loop. The battery pack requires the temperature of the temperature regulating medium to be lower than the ambient temperature. The second heat dissipation device can effectively reduce the temperature regulating medium in the temperature regulating channel of the battery pack to a more suitable temperature.

[0038] In one embodiment, the energy storage device further includes an energy storage converter, which is electrically connected to the battery pack and the energy storage interface to convert the electrical energy input or output of the battery pack. The temperature control system further includes a second pipeline, which is connected in parallel with the temperature control channel of the battery pack and connected in series with a third circulating pump. The temperature control channel of the energy storage converter is located in the second pipeline.

[0039] In this embodiment of the scheme, the second pipeline is connected in parallel with the temperature regulating channel of the battery pack, and the second pipeline is connected in series with the third circulating pump. The temperature regulating channel of the energy storage converter is located in the second pipeline. The required temperature of the cooling medium for the energy storage converter is slightly different from that required by the battery pack. The second pipeline is connected in parallel with the temperature regulating channel of the battery pack, and the flow rate of the cooling medium in the second pipeline and the temperature regulating channel of the battery pack can be adaptively adjusted according to the actual temperature regulation requirements.

[0040] In one embodiment, the energy storage device further includes a valve, which is connected in series with the temperature control channel of the energy storage converter in a second pipeline.

[0041] In the embodiments of this disclosure, the energy storage device further includes a valve, which is connected in series with the temperature regulation channel of the energy storage converter. During the charging process of the energy storage device for external electrical equipment, the energy storage converter is in a dormant state and does not require temperature regulation. Closing the valve can stop the flow of cooling medium to the energy storage converter, so that the second heat dissipation device and the temperature regulation system can fully function on the battery pack to improve the temperature regulation effect.

[0042] In one embodiment, the temperature control system further includes a heater disposed in a third circulation loop.

[0043] In the embodiments of this disclosure, the temperature control system further includes a heater disposed in the third circulation loop. The battery pack's performance is affected to some extent in low-temperature environments. The heater can heat the third circulation loop to increase the battery pack's temperature, thereby ensuring the battery pack's normal operation to a certain extent.

[0044] A second aspect of the present disclosure provides a temperature regulation method for an energy storage device, the temperature regulation method comprising:

[0045] Obtain the operating mode of the energy storage device, and the temperature control object corresponding to each operating mode includes at least the battery pack;

[0046] The operating mode requires at least one activation of the temperature control system, which is used for heat exchange with the battery pack. The cooling system and the temperature control system are thermally separated. The cooling system is used for heat exchange with the charging converter and the charging connector. A first heat dissipation device is installed in the cooling system, and a second heat dissipation device is installed in the temperature control system. The charging converter is electrically connected to both the battery pack and the charging connector. When the operating mode is the first operating mode of charging the battery pack, the cooling system is in the off state and the temperature control system is in the on state. When the operating mode is the second operating mode of discharging the battery pack to the charging connector through the charging converter, both the cooling system and the temperature control system are in the on state. When the operating mode is the sleep mode, the cooling system is in the off state and the temperature control system is in the on state.

[0047] In the embodiments of this disclosure, at least the temperature control system is activated according to the operating mode, enabling temperature regulation of the charging converter, charging connector, and battery pack based on the actual needs of the operating mode. During the operation of the energy storage device, there are situations where the charging converter and battery pack require cooling. Since the temperature difference between the cooling medium requirements of the charging converter and battery pack in actual application scenarios is significant, the first and second heat dissipation devices can be adjusted according to different heat dissipation needs through the cooling system and temperature control system, respectively, thereby fully utilizing the heat dissipation devices in the energy storage device for cooling the charging converter and battery pack. Furthermore, by using the first heat dissipation device to cool the cooling system and the second heat dissipation device to regulate the temperature of the temperature control system, a large temperature difference can exist between the temperature-regulating fluid in the cooling system and the temperature-regulating fluid in the temperature control system, allowing the energy storage device to reduce energy consumption while basically meeting the overall temperature regulation requirements.

[0048] In one embodiment, the operating mode is a first operating mode for charging the battery pack, and the temperature control system is activated at least according to the operating mode, including:

[0049] Start the temperature control system and the cooler of the second heat dissipation device while keeping the cooling system off.

[0050] In the embodiments of this disclosure, during the charging process of the battery pack, the battery pack generates a large amount of heat during operation, and the required temperature of the cooling medium for the battery pack is lower than the ambient temperature. By activating the cooler and the third circulation pump, the battery pack can be effectively cooled.

[0051] In one embodiment, the temperature control object corresponding to the first operating mode further includes an energy storage converter. The cooling system and the cooler of the second heat dissipation device are activated while the cooling system remains off, including:

[0052] With the cooling system closed, the compressor in the refrigeration unit of the second heat dissipation device is started to cool the third circulation loop of the temperature control system.

[0053] With the cooling system off, the third circulation pump in the temperature control system is started. The temperature control channel of the battery pack and the third circulation pump are connected in series in the third circulation loop of the temperature control system. The second heat dissipation device is set in the third circulation loop. The temperature control channel of the energy storage converter is set in the second pipeline of the temperature control system. The second pipeline is connected in parallel with the temperature control channel of the battery pack. The second pipeline is connected in series with the third circulation pump.

[0054] In the embodiments of this disclosure, the second pipeline is connected in parallel with the temperature regulating channel of the battery pack, and the flow rate of the cooling medium in the second pipeline and the temperature regulating channel of the battery pack can be adaptively adjusted according to the actual temperature regulation requirements.

[0055] In one embodiment, the refrigerator that activates the temperature control system and the second heat dissipation device while the cooling system remains off further includes:

[0056] With the cooling system closed, open the valve located in the temperature control system. The valve and the temperature control channel of the energy storage converter are connected in series in the second pipeline of the temperature control system.

[0057] In the embodiments of this disclosure, a valve is provided in the second pipeline of the temperature control system. By closing the valve, the flow of cooling medium through the temperature control channel of the energy storage converter can be stopped, thereby alleviating the temperature control pressure of the second heat dissipation device on the temperature control system when the temperature of the energy storage converter is not required, and reducing energy consumption to a certain extent.

[0058] In one embodiment, the operating mode is a second operating mode in which the battery pack discharges to the charging connector through the charging inverter. The temperature control objects corresponding to the second operating mode also include the charging connector and the charging inverter. According to the operating mode, at least the temperature control system is activated, including:

[0059] Start the cooling system, temperature control system, and the refrigerator of the second heat dissipation device.

[0060] In the embodiments of this disclosure, during the charging and discharging process of the battery pack through the charging converter, the charging connector, the charging converter, and the battery pack are all in operation and generate a certain amount of heat. Based on actual usage requirements, the required temperature of the cooling medium for the charging connector is similar to that required by the charging converter. Temperature regulation can be effectively achieved through a cooling system, a temperature control system, and a refrigerator.

[0061] In one embodiment, the temperature control object corresponding to the second operating mode further includes an energy storage converter, and the cooler that starts the cooling system, temperature control system, and second heat dissipation device includes:

[0062] Start the first and second circulation pumps of the cooling system to cool the charging converter and charging connector;

[0063] The compressor in the refrigeration unit of the second heat dissipation device is activated to cool the third circulation loop of the temperature control system.

[0064] Start the third circulation pump in the temperature control system. The temperature control channel of the battery pack and the third circulation pump are connected in series in the third circulation loop of the temperature control system. The second heat dissipation device is set in the third circulation loop. The temperature control channel of the energy storage converter is set in the second pipeline of the temperature control system. The second pipeline is connected in parallel with the temperature control channel of the battery pack. The second pipeline is connected in series with the third circulation pump.

[0065] In the embodiments of this disclosure, the required temperature of the cooling medium for the battery pack is similar to that required by the energy storage converter. Sharing a temperature control system between the battery pack and the energy storage converter allows for better utilization of the heat dissipation capacity of the heat dissipation system and the second heat dissipation device.

[0066] In one embodiment, the cooler that activates the cooling system, temperature control system, and second heat dissipation device further includes:

[0067] Open the valve installed in the temperature control system. The valve and the temperature control channel of the energy storage converter are connected in series in the second pipeline of the temperature control system.

[0068] In this embodiment of the scheme, a valve is provided in the second pipeline of the temperature control system. By closing the valve, the flow of cooling medium through the temperature control channel of the energy storage converter can be stopped, thereby alleviating the temperature control pressure of the second heat dissipation device on the temperature control system when the temperature of the energy storage converter is not required, and reducing energy consumption to a certain extent.

[0069] In one embodiment, the operating mode is a sleep mode, and the temperature control system is activated at least according to the operating mode, including:

[0070] Start the temperature control system while keeping the cooling system off.

[0071] In the embodiments of this disclosure, when the operating mode is sleep mode, the cooling system is turned off and the temperature control system is activated. When the operating mode is sleep mode, the battery pack, charging connector, and charging inverter are not working. However, the battery pack has certain temperature requirements during startup, and the battery pack's lifespan will be affected if it is kept at an unsuitable temperature for a long time. By activating the temperature control system, the battery pack can be conditioned to a suitable temperature.

[0072] In one embodiment, activating the temperature control system while the cooling system remains off includes:

[0073] With the cooling system off, the third circulation pump in the temperature control system is started. The temperature control channel of the battery pack and the third circulation pump are connected in series in the third circulation loop of the temperature control system. The second heat dissipation device is installed in the third circulation loop.

[0074] With the cooling system closed, the valve in the temperature control system is shut off. The valve and the temperature control channel of the energy storage converter are connected in series in the second pipeline of the temperature control system. The second pipeline is connected in parallel with the temperature control channel of the battery pack, and the second pipeline is connected in series with the third circulation pump. In this embodiment of the present disclosure, the energy storage device is in a dormant mode, and the charging connector, charging converter, energy storage converter, and battery pack are all in a closed state. The battery pack is affected by the ambient temperature, which may prevent it from starting normally. By starting the third circulation pump, the cooling medium in the temperature control system can be driven to flow, thereby allowing the battery pack to approach its normal operating temperature as much as possible.

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

[0076] With the cooling system closed, the compressor in the refrigeration unit of the second heat dissipation device is activated to cool the third circulation loop of the temperature control system.

[0077] In the embodiments of this disclosure, when the ambient temperature is higher than the normal start-up temperature of the battery pack, the compressor in the cooler of the second heat dissipation device can be activated to cool the battery pack so that its temperature approaches the normal operating temperature.

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

[0079] With the cooling system closed, the heater located in the third circulation loop is activated to heat the third circulation loop of the temperature control system.

[0080] In the embodiments of this disclosure, when the ambient temperature is lower than the normal start-up temperature of the battery pack, the heater installed in the third circulation loop can be activated 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.

[0081] In one embodiment, the temperature control method further includes:

[0082] Turn on the fan to dissipate heat.

[0083] In the embodiments of this disclosure, by starting the fan to dissipate heat from the first and second heat dissipation devices, the air can be driven to flow rapidly, thereby quickly carrying the heat out of the cabinet from the energy storage device, and the heat dissipation capacity of the energy storage device is high.

[0084] Invention effects:

[0085] In the embodiments of this disclosure, the cooling system and the temperature control system are thermally separated. The cooling system is used for heat exchange with the charging converter and the charging connector, while the temperature control system is used for heat exchange with the battery pack. During the charging process of the battery pack, the battery pack is working, but the charging connector and the charging converter are not working. The cooling system can be turned off and the temperature control system can be turned on to regulate the temperature of the battery pack. During the process of the charging connector transmitting the electrical energy transmitted by the charging converter, the battery pack, the charging connector, and the charging converter are all working. The cooling system and the temperature control system can be turned on to regulate the temperature of the battery pack, the charging connector, and the charging converter, thereby adapting to the temperature regulation of different objects under different working modes of the energy storage device. Attached Figure Description

[0086] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this disclosure. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0087] Figure 1 is a simplified structural diagram of an energy storage device according to a first embodiment of this disclosure;

[0088] Figure 2 is a simplified structural diagram of the energy storage device according to the second embodiment of this disclosure;

[0089] Figure 3 is a simplified structural diagram of an energy storage device according to a third embodiment of this disclosure;

[0090] Figure 4 is a structural schematic diagram of the energy storage device according to the fourth embodiment of this disclosure;

[0091] Figure 5 is a simplified structural diagram of the energy storage device according to the fifth embodiment of this disclosure;

[0092] Figure 6 is a schematic flowchart of the temperature control method according to the sixth embodiment of this disclosure;

[0093] Figure 7 is a schematic flowchart of the temperature control method according to the seventh embodiment of this disclosure;

[0094] Figure 8 is a schematic flowchart of the temperature control method according to the eighth embodiment of this disclosure;

[0095] Figure 9 is a schematic flowchart of the temperature control method according to the ninth embodiment of this disclosure;

[0096] Figure 10 is a schematic flowchart of the temperature control method according to the tenth embodiment of this disclosure;

[0097] Figure 11 is a schematic flowchart of the temperature control method according to the eleventh embodiment of this disclosure;

[0098] Figure 12 is a schematic flowchart of a temperature regulation method for an energy storage device in a dormant mode according to an embodiment of the present disclosure.

[0099] Explanation of reference numerals in the attached figures

[0100] 1. Cabinet; 2. Battery pack; 3. Energy storage converter; 4. Charging converter; 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 Implementation

[0101] The embodiments of the technical solutions disclosed herein will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solutions disclosed herein and are therefore intended to limit the scope of protection of this disclosure.

[0102] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this disclosure; the terms “comprising” and “having”, and any variations thereof, in the specification and the foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0103] In the description of the embodiments of this disclosure, technical terms such as "first," "second," and "third" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary or secondary relationship of the indicated technical features. In the description of the embodiments of this disclosure, "a plurality of" means two or more, unless otherwise explicitly defined.

[0104] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this disclosure. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0105] In the description of the embodiments of this disclosure, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0106] In the description of the embodiments of this disclosure, the technical terms "top," "bottom," "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated, or used in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this disclosure.

[0107] In the description of the embodiments of this disclosure, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0108] In the description of the embodiments of this disclosure, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0109] In related technologies, the battery pack of an energy storage device supplies power to a charging connector via a charging converter, enabling the charging connector to supply power to electrical devices such as electric vehicles. An external power source charges the battery pack, allowing it to store electrical energy. While not all components—the charging converter, charging connector, and battery pack—require temperature regulation in different operating modes, temperature-regulating fluids flow through these components during operation, making it difficult to specifically adapt to the temperature regulation needs of the energy storage device in various operating modes.

[0110] The present disclosure provides cooling for the charging converter 4 using a first heat dissipation device 7 and a cooling system 6, and temperature regulation for the battery pack 2 using a second heat dissipation device 9 and a temperature regulation system 8. The temperature regulation system 8 and the cooling system 6 are thermally separated, minimizing their mutual interference. The first heat dissipation device 7 and the second heat dissipation device 9 can adjust their temperatures according to the cooling medium requirements of the charging converter 4 and the battery pack 2, respectively, which helps reduce energy consumption. Through the thermal separation between the cooling system 6 and the energy storage system, temperature regulation is performed for different objects under different operating modes, allowing the energy storage device to adapt well to various operating conditions.

[0111] Battery pack 2 refers to a device capable of outputting electrical energy. For example, electrical energy can be output from battery pack 2, which consists of individual battery cells. Alternatively, electrical energy can be output from battery pack 2, which consists of battery modules composed of individual battery cells.

[0112] This disclosure also provides a battery pack 2, which includes a mounting housing and battery units disposed inside the mounting housing.

[0113] In this embodiment of the disclosure, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0114] In this embodiment of the disclosure, 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-metal hydride battery, a nickel-cadmium battery, a lead-acid battery, etc., and this embodiment of the disclosure is not limited to this.

[0115] For example, a battery cell includes a housing and an electrode assembly disposed within the housing.

[0116] In some embodiments, the housing can be a sealed structure or a non-sealed structure. As an example, when the housing is a non-sealed structure, the housing serves to protect the electrode assembly, and a sealing bag is included between the housing and the electrode assembly to encapsulate the electrode assembly and the electrolyte. Specifically, the sealing bag can be a bag-shaped insulating component or an aluminum-plastic film.

[0117] This disclosure also provides an energy storage device, as shown in Figures 1 to 5. The energy storage device has at least a first operating mode, a second operating mode, and a hibernation 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 regulation 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 inside the cabinet 1 and is electrically connected to the energy storage interface. The charging converter 4 is electrically connected to the battery pack 2 to convert the electrical energy input or output by the battery pack 2. The charging connector 5 is electrically connected to the charging converter 4 to transmit the electrical 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 disposed in the cooling system 6. The temperature regulation system 8 is used for heat exchange with the battery pack 2, and the cooling system 6 and the temperature regulation system 8 are thermally separated. The second heat dissipation device 9 is disposed in the temperature regulation system 8. The controller is used to keep the cooling system 6 off and start the temperature control system 8 in the first operating mode, the controller is used to start the cooling system 6 and the temperature control system 8 in the second operating mode, and the controller is used to keep the cooling system 6 off and start the temperature control system 8 in the hibernation mode.

[0118] The charging converter 4 refers to the converter that is electrically connected between the battery pack 2 and the charging connector 5, and is used to convert the electrical energy output or input of the battery pack 2.

[0119] For example, the energy storage device also includes an energy storage converter 3, which is electrically connected to the battery pack 2 and the energy storage interface, respectively.

[0120] The energy storage converter 3 refers to a converter that is electrically connected between the external power source and the battery pack 2, and is used to convert the electrical energy output or input of the battery pack 2.

[0121] An inverter is an electrical device that changes the voltage, frequency, number of phases, and other electrical quantities or characteristics of a power supply system. Charging connector 5 is an electrical device used for electrical connection to electrical equipment, enabling the transfer of electrical energy from the battery pack 2 to the equipment.

[0122] For example, the charging connector 5 is a charging gun.

[0123] For example, the charging connector 5 is a structure used for charging new energy vehicles.

[0124] For example, the energy storage device is a new energy charging pile.

[0125] It should be noted that cooling system 6 is a regulating system with cooling function.

[0126] It should be noted that the temperature control system 8 is a regulating system with both cooling and heating functions.

[0127] It should be noted that the different control systems are thermally separated, meaning that there is no heat exchange between the different control systems, and the heat exchangers are not installed between the two different control systems.

[0128] It should be noted that within the same control system, when the flow channels within the system are interconnected, the cooling medium can circulate to each flow channel. Conversely, when there are isolated flow channels within the system, and these isolated flow channels are housed in heat exchangers that span across these isolated flow channels, the cooling medium within these isolated flow channels can exchange heat through the heat exchangers. In other words, within the same control system, either the flow channels are interconnected, or if isolated flow channels exist, heat exchange occurs through a heat exchanger.

[0129] It should be explained that in two mutually isolated flow channels, the cooling medium in one flow channel will not flow to the other flow channel which is isolated from it.

[0130] It should be explained that a heat exchanger is a structure that enables heat exchange between different, isolated flow channels.

[0131] In the embodiment of this disclosure, the cooling system 6 and the temperature control system 8 are thermally separated. The cooling system 6 is used for heat exchange with the charging converter 4 and the charging connector 5, while the temperature control system 8 is used for heat exchange with the battery pack 2. During the charging process of the battery pack 2, the battery pack 2 is working, but the charging connector 5 and the charging converter 4 are not working. The cooling system 6 can be turned off and the temperature control system 8 can be turned on to regulate the temperature of the battery pack 2. During the process of the charging connector 5 transmitting the electrical energy transmitted by the charging converter 4, the battery pack 2, the charging connector 5, and the charging converter 4 are all working. The cooling system 6 and the temperature control system 8 can be turned on to regulate the temperature of the battery pack 2, the charging connector 5, and the charging converter 4, thereby adapting to the temperature regulation of different objects under different working modes of the energy storage device.

[0132] For example, 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 regulated 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.

[0133] In one embodiment, referring to Figures 1 and 2, the first heat dissipation device 7 is a cooling container for containing a cooling medium. The space inside the cooling container for containing the cooling medium is provided 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 disposed across the refrigerator 90 and the temperature control system 8.

[0134] The first heat exchanger 91 refers to a heat exchanger capable of exchanging heat between the refrigerator 90 and the temperature control system 8.

[0135] Refrigerator 90 refers to a structure capable of forced cooling.

[0136] During the operation of the energy storage device, the temperature of the temperature regulating fluid required for the battery pack 2 is lower than the ambient temperature, while the maximum allowable temperature of the temperature regulating fluid required for the charging converter 4 and the maximum allowable temperature of the temperature regulating fluid required for the charging connector 5 are higher than the ambient temperature.

[0137] For example, the battery pack 2 corresponds to a required temperature of approximately 18°C ​​to 20°C for the temperature-regulating fluid. With an ambient temperature of approximately 45°C, the charging converter 4 corresponds to a maximum permissible temperature of approximately 63°C to 65°C for the required temperature-regulating fluid. With an ambient temperature of approximately 45°C, the charging connector 5 corresponds to a maximum permissible temperature of approximately 85°C for the required temperature-regulating fluid.

[0138] In this embodiment, the charging converter 4 is cooled by a cooling container, and the cooler 90 cools the iodine exceeding the standard. The charging converter 4 and the battery pack 2 have significantly different temperature requirements for the cooling medium. Since the maximum allowable temperature of the temperature-regulating fluid required for the charging converter 4 and the charging connector 5 is higher than the ambient temperature, the ambient airflow through the cooling container provides air cooling, which essentially meets the cooling requirements of the charging connector 5 and the charging converter 4, thus reducing energy consumption. The temperature of the temperature-regulating fluid required for the battery pack 2 is lower than the ambient temperature. The cooler 90 can lower the temperature of the temperature-regulating fluid in the temperature regulation system 8 to below the ambient temperature, thus better meeting the temperature regulation requirements of the battery pack 2.

[0139] It is understood that the embodiments of this disclosure 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 cooler 90.

[0140] In one embodiment, referring to Figure 3, the refrigerator 90 includes a compressor 900, a condenser 901, an expansion valve 902 and an evaporator 903 connected in sequence, and a first heat exchanger 91 spans the evaporator 903 and the temperature control system 8.

[0141] Compressor 900 refers to a structure in the refrigerant circuit that compresses and drives the refrigerant.

[0142] A condenser 901 is a structure that can convert gas or vapor into liquid and transfer heat from the pipes to the nearby air in a relatively fast manner.

[0143] Evaporator 903 refers to a structure that utilizes the easy evaporation of liquid low-temperature refrigerant under low pressure to turn it into vapor, and absorbs the heat of the medium being cooled to achieve the purpose of refrigeration.

[0144] Expansion valve 902 refers to a structure that allows liquid refrigerant to pass through it and become low-temperature, low-pressure wet vapor, and then the refrigerant absorbs heat in evaporator 903 to achieve a cooling effect.

[0145] The projection area of ​​the condenser 901 and the projection area of ​​the cooling container are offset from each other, meaning that there is no overlap between the projection areas of the condenser 901 and the projection areas of the cooling container, although the outlines of the projection areas may overlap.

[0146] In the embodiments of this disclosure, 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, thereby allowing the battery pack 2 to operate in a more suitable environment.

[0147] It is understood that the embodiments of this disclosure do not limit the type of cooler 90. Exemplarily, the cooler 90 is a semiconductor cooler 90, which includes a thermoelectric module, a heat sink, and electrodes.

[0148] In one embodiment, the energy storage device further includes at least one fan 10, which is installed in the cabinet 1. The fan 10 is used to dissipate heat from the condenser 901 and the cooling container. The projection area of ​​the condenser 901 and the projection area of ​​the cooling container are offset from each other along the air outlet direction of the fan 10.

[0149] In the embodiment of this disclosure, the projection area of ​​the condenser 901 and the projection area of ​​the first heat dissipation device 7 are offset from each other along the air outlet direction of the fan 10. During the airflow driven by the fan 10, the heat generated by the condenser 901 and the first heat dissipation device 7 has a small mutual influence, which can increase the heat dissipation effect of the fan 10 to a certain extent.

[0150] It is understood that the embodiments of this disclosure are not limited to projection along the air outlet direction of the fan 10, where the projection area of ​​the condenser 901 and the projection area of ​​the cooling container are offset from each other. Exemplarily, 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 at least partially overlap.

[0151] In one embodiment, please refer to FIG1. ​​Projecting 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.

[0152] The projection area of ​​the fan 10 spans the projection areas of the condenser 901 and the cooling container, meaning that the projection area of ​​the fan 10 overlaps with both the projection areas of the condenser 901 and the cooling container.

[0153] In the embodiment of this disclosure, the projection area of ​​the fan 10 spans the projection areas of the condenser 901 and the cooling container. During the process of the fan 10 dissipating heat from the condenser 901 and the cooling container, the flowing air carrying heat from the condenser 901 is less likely to repeatedly affect the cooling container, thereby mitigating the mutual interference between the condenser 901 and the cooling container.

[0154] It is understood that the embodiments of this disclosure do not limit the arrangement of the fan 10, the condenser 901, and the cooling container. Exemplarily, the fan 10, the condenser 901, and the cooling container are arranged sequentially along the air outlet direction of the fan 10.

[0155] 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.

[0156] In the embodiments of this disclosure, the battery pack 2 generates a large amount of heat during operation, requiring significant heat dissipation. The cooling medium in the cooling system 6 carries the heat from the charging inverter 4 to the cooling container, and the condenser 901 in the temperature control system 8 also generates a large amount of heat. Since hot air typically rises, the condenser 901 and the cooling container being located above the battery pack 2 can mitigate heat transfer to the battery pack 2, thus increasing its heat dissipation capacity to some extent. Furthermore, the cooling container and condenser 901 are located above the fan 10, which blows air upwards. The resulting airflow acts on the cooling container and condenser 901, effectively removing heat upwards and resulting in better heat dissipation. If the cooling container is placed below the fan 10, which blows air downwards, the resulting airflow carries heat downwards for a distance before rising again, thus acting on the cooling container and condenser 901 again, resulting in poorer heat dissipation.

[0157] It is understood that the embodiments of this disclosure are not limited to the cooling container and condenser 901 both being located above the battery pack 2. Exemplarily, the cooling container and / or condenser 901 are located below the battery pack 2.

[0158] It is understood that the embodiments of this disclosure are not limited to the cooling container and condenser 901 both being located above the fan 10. Exemplarily, the cooling container and / or condenser 901 are located below or to the side of the fan 10.

[0159] In one embodiment, referring to Figures 1 and 2, the energy storage device further includes a first circulation pump 11, and the cooling system 6 includes:

[0160] The cooling channels of the first circulation loop 60, the first circulation pump 11, and the charging converter 4 are all connected in series in the first circulation loop 60.

[0161] The sub-cooling system 61 has a cooling channel for the charging connector 5. The sub-cooling system 61 includes a first pipe 610 connected in series with the first circulating pump 11 and connected in parallel with the cooling channel of the charging converter 4. A first heat dissipation device 7 is provided in at least one of the first circulating loop 60 and the sub-cooling system 61 to cool the charging connector 5 and the charging converter 4.

[0162] For example, the first circulation pump 11 is an electronic pump.

[0163] In this embodiment of the scheme, the energy storage device further includes a first circulating pump 11, and the cooling system 6 includes a first circulating loop 60 and a sub-cooling system 61. The sub-cooling system 61 includes a first pipeline 610. The charging converter 4 is disposed in the first circulating loop 60, and the first heat dissipation device 7 is disposed in at least one of the first circulating loop 60 and the sub-cooling system 61. The charging converter 4 and the charging connector 5 are disposed on different pipelines, which facilitates the arrangement of the cooling system 6. The arrangement of the first circulating loop 60 and the sub-cooling system 61 is not limited by the relative positions of the charging converter 4 and the charging connector 5. After the first circulating loop 60 and the sub-cooling system 61 are arranged, the first heat dissipation device 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 circulating loop 60 can adjust the flow rates of different cooling media accordingly to meet different cooling requirements.

[0164] It is understood that the embodiments of this disclosure are not limited to the cooling system 6 including the first circulation loop 60 and the sub-cooling system 61, the charging converter 4 being disposed in the first circulation loop 60, and the charging connector 5 being disposed in the sub-cooling system 61. Exemplarily, the cooling channel of the charging connector 5 is disposed in the first pipe 610, and the cooling channel of the charging converter 4 is disposed in the first circulation loop 60.

[0165] In one embodiment, referring to FIG2, the sub-cooling system 61 further includes a second heat exchanger 611, a second circulating pump 612, and a second circulating loop 613. One heat exchange channel of the second heat exchanger 611 is disposed in the first pipeline 610. The cooling channel of the charging connector 5, the second circulating pump 612, and the other heat exchange channel of the second heat exchanger 611 are connected in series in the second circulating loop 613. The second circulating loop 613 is isolated from the first pipeline 610. The first heat dissipation device 7 is disposed in at least one of the first circulating loop 60, the heat exchange channel of the second heat exchanger 611, and the second circulating loop 613.

[0166] The second heat exchanger 611 refers to a heat exchanger capable of exchanging heat between the first pipeline 610 and the second circulation loop 613.

[0167] The isolation between the second circulation loop 613 and the first pipe 610 means that the cooling medium in the first pipe 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 pipe 610.

[0168] In this embodiment of the scheme, one heat exchange channel of the second heat exchanger 611 is disposed in the first pipeline 610, and the other heat exchange channel is connected in series in the second circulation loop 613. 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 configured 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 improving the user experience.

[0169] It is understood that the embodiments of this disclosure are not limited to the isolation of the first conduit 610 and the second circulation loop 613. Exemplarily, the second circulation loop 613 is interconnected with the first conduit 610, and the charging connector 5 and the charging converter 4 are connected in parallel.

[0170] In one embodiment, the cooling medium in the first circulation loop 60 is water; the cooling medium in the second circulation loop 613 is oil.

[0171] For example, the cooling medium in the first circulation loop 60 may also be a water-glycol solution.

[0172] For example, the cooling medium in the second circulation loop 613 is silicone oil.

[0173] In this embodiment, the cooling medium in the first circulation loop 60 is water. Since the charging converter 4 requires high cooling capacity, and water has a large specific heat capacity, it can effectively cool the charging converter 4, thus better meeting its cooling needs. The cooling medium in the second circulation loop 613 is oil. Oil has poor electrical conductivity. Since the energy storage device needs to discharge through the charging connector 5, the oil helps to mitigate the risk of electric shock or short circuit due to cooling medium leakage during the cooling process of the charging connector 5, making the energy storage device safer.

[0174] It is understood that the embodiments of this disclosure are not limited to water as the cooling medium in the first circulation loop 60 and oil as the cooling medium in the second circulation loop 613. Exemplarily, the cooling medium in both the first circulation loop 60 and the second circulation loop 613 is water.

[0175] In one embodiment, referring to FIG3, the temperature control system 8 includes a third circulation loop 80 and a third circulation pump 81. The temperature control channel of the battery pack 2 and the third circulation pump 81 are connected in series in the third circulation loop 80, and the second heat dissipation device 9 is disposed in the third circulation loop 80.

[0176] For example, the first heat exchanger 91 includes interconnected temperature control pipes and heat exchange fins. The temperature control pipes are disposed in the heat dissipation channel, and the heat exchange fins exchange heat with the evaporator 903 to dissipate heat.

[0177] In the embodiment of this disclosure, the second heat dissipation device 9 is disposed in the third circulation loop 80. The battery pack 2 requires the temperature of the temperature regulating medium to be lower than the ambient temperature. The second heat dissipation device 9 can effectively reduce the temperature regulating medium in the temperature regulating channel of the battery pack 2 to a more suitable temperature.

[0178] In one embodiment, 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 to convert the electrical energy input or output of the battery pack 2. The temperature control system 8 further includes a second pipeline 82, which is connected in parallel with the temperature control channel of the battery pack 2 and connected in series with a third circulating pump 81. The temperature control channel of the energy storage converter 3 is located in the second pipeline 82.

[0179] In this embodiment of the present disclosure, the second pipeline 82 is connected in parallel with the temperature-regulating channel of the battery pack 2, and the second pipeline 82 is connected in series with the third circulating pump 81. The temperature-regulating channel of the energy storage converter 3 is located in the second pipeline 82. The required temperature of the cooling medium for the energy storage converter 3 is slightly different from that required by the battery pack 2. The second pipeline 82 is connected in parallel with the temperature-regulating channel of the battery pack 2, and the flow rate of the cooling medium in the second pipeline 82 and the temperature-regulating channel of the battery pack 2 can be adaptively adjusted according to the actual temperature regulation requirements.

[0180] It is understood that the embodiments of this disclosure do not limit whether the energy storage device includes an energy storage converter 3. Exemplarily, the energy storage converter 3 can be installed on the grid side, and the grid converts the current into DC power through the energy storage converter 3 to enter the battery pack.

[0181] It is understood that this disclosure does not limit the temperature regulation method of the energy storage converter 3. Exemplarily, the temperature regulation channel of the energy storage converter 3 is provided in the third circulation loop 80.

[0182] In one embodiment, the energy storage device further includes a valve 12, which is connected in series with the temperature regulating channel of the energy storage converter 3 in the second pipeline 82.

[0183] For example, valve 12 is an electronic valve 12.

[0184] For example, when valve 12 is in the open state, the temperature regulating channel of the energy storage converter 3 is connected to the third circulation loop 80. When valve 12 is in the closed state, the temperature regulating channel of the energy storage converter 3 is disconnected from the third circulation loop 80.

[0185] In this embodiment of the scheme, the energy storage device further includes a valve 12, which is connected in series with the temperature regulation channel of the energy storage converter 3. During the charging process of the energy storage device for external electrical equipment, the energy storage converter 3 is in a dormant state and does not require temperature regulation. Closing the valve 12 can stop the flow of cooling medium to the energy storage converter 3, so that the second heat dissipation device 9 and the temperature regulation system 8 can fully act on the battery pack 2 to improve the temperature regulation effect.

[0186] It is understood that the embodiments of this disclosure do not limit whether valve 12 is provided.

[0187] It is understandable that when the energy storage device does not have an energy storage converter 3, the energy storage device may not have a valve 12, and the temperature control system 8 will only regulate the temperature of the battery pack 2.

[0188] In one embodiment, the temperature control system 8 further includes a heater 83, which is disposed in the third circulation loop 80.

[0189] For example, heater 83 is a heating resistor.

[0190] In this embodiment of the present disclosure, the temperature control system 8 further includes a heater 83 disposed in the third circulation loop 80. The performance of the battery pack 2 is affected to some extent in low-temperature environments. 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.

[0191] It is understood that the embodiments of this disclosure do not limit whether a heater 83 is provided.

[0192] In one embodiment, the charging inverter 4 is located inside the cabinet 1.

[0193] In the embodiment of this disclosure, 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 make it more convenient to transfer the energy storage device.

[0194] It is understood that the embodiments of this disclosure are not limited to the charging inverter 4 being located inside the cabinet 1. Exemplarily, the charging inverter 4 is located outside the cabinet 1.

[0195] In one embodiment, the charging connector 5 is partially located outside the cabinet 1.

[0196] In the embodiments of this disclosure, the charging connector 5 is partially located outside the cabinet 1, which allows the user to easily move the charging connector 5 to charge the electrical equipment.

[0197] In one embodiment, the charging converter 4 is a DC converter.

[0198] A DC converter is a converter whose input current and output current are both direct current.

[0199] In the embodiments of this disclosure, since most new energy vehicles and other electrical devices currently use direct current for charging, the current output by the battery pack 2 can be adjusted through a DC converter to adapt to the input current parameters of various electrical devices. This results in high adaptability of the energy storage device.

[0200] For example, the energy storage converter 3 is an AC converter.

[0201] For example, the energy storage device also includes multiple temperature and pressure sensors, and temperature and pressure sensors are provided on the temperature regulating channel of the battery pack 2, the temperature regulating channel of the energy storage converter 3, the cooling channel of the charging converter 4, and the cooling channel of the charging connector 5.

[0202] Embodiments of this disclosure also provide a temperature regulation method for an energy storage device, as shown in Figures 6 to 12, including:

[0203] Step S1: Obtain the operating mode of the energy storage device. The temperature control object corresponding to each operating mode includes at least the battery pack.

[0204] Step S2: At least start the temperature control system according to the working mode.

[0205] For example, the temperature control system is used for heat exchange with the energy storage converter 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 for heat exchange with the charging converter 4 and the charging connector 5. A first heat dissipation device 7 is disposed in the cooling system 6, and a second heat dissipation device 9 is disposed in the temperature control system 8. The energy storage converter 3 is electrically connected to the battery pack 2 and the energy storage interface, respectively. The charging converter 4 is electrically connected to the battery pack 2 and the charging connector 5, respectively. When the operating mode is the first operating mode of charging the battery pack 2, the cooling system 6 is in the off state and the temperature control system 8 is in the on state. When the operating mode is the second operating mode of discharging the battery pack 2 to the charging connector 5 through the charging converter 4, both the cooling system 6 and the temperature control system 8 are in the on state. When the operating mode is the sleep mode, the cooling system 6 is in the off state and the temperature control system 8 is in the on state.

[0206] Hibernation mode refers to the operating mode in which the battery pack 2, charging inverter 4, and charging connector 5 are all in a closed state.

[0207] In the embodiments of this disclosure, at least the temperature control system 8 is activated according to the operating mode, enabling temperature regulation of the charging converter 4, charging connector 5, and battery pack 2 based on the actual needs of the operating mode. During the operation of the energy storage device, there are situations where the charging converter 4 and battery pack 2 require cooling. Since the temperature difference between the cooling medium requirements of the charging converter 4 and battery pack 2 in actual application scenarios is significant, the first heat dissipation device 7 and the second heat dissipation device 9 can be adjusted according to different heat dissipation needs through the cooling system 6 and the temperature control system 8, respectively, thereby fully utilizing the heat dissipation devices in the energy storage device for cooling the charging converter 4 and battery pack 2. Furthermore, the first heat dissipation device 7 cools the cooling system 6, and the second heat dissipation device 9 regulates the temperature of the temperature control system 8. A large temperature difference can exist between the temperature-regulating fluid in the cooling system 6 and the temperature-regulating fluid in the temperature control system 8, allowing the energy storage device to reduce energy consumption while basically meeting the overall temperature regulation requirements.

[0208] In one embodiment, referring to Figure 8, the operating mode is a first operating mode of charging the battery pack 2. Based on this operating mode, at least the temperature control system 8 is activated, including:

[0209] Step S20: Start the temperature control system and the cooler of the second heat dissipation device while the cooling system is turned off.

[0210] In the embodiments of this disclosure, 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 for the battery pack 2 is lower than the ambient temperature. By activating the cooler 90 and the third circulation pump 81, the battery pack 2 can be cooled effectively.

[0211] In one embodiment, referring to Figure 9, the temperature control object corresponding to the first operating mode further includes the energy storage converter 3. The cooling system 8 and the cooler 90 of the second heat dissipation device 9 are activated while the cooling system 6 remains off, including:

[0212] Step S200: With the cooling system closed, start the compressor in the refrigeration unit of the second heat dissipation device to cool the third circulation loop of the temperature control system;

[0213] Step S201: Start the third circulation pump in the temperature control system while keeping the cooling system off.

[0214] For example, the temperature regulating channel of the battery pack 2 and the third circulation pump 81 are connected in series in the third circulation loop 80 of the temperature regulating system 8, the second heat dissipation device 9 is disposed in the third circulation loop 80, the temperature regulating channel of the energy storage converter 3 is disposed in the second pipeline 82 of the temperature regulating system 8, the second pipeline 82 is connected in parallel with the temperature regulating channel of the battery pack 2, and the second pipeline 82 is connected in series with the third circulation pump 81.

[0215] In the embodiment of this disclosure, the second pipe 82 is connected in parallel with the temperature regulating channel of the battery pack 2, and the flow rate of the cooling medium in the second pipe 82 and the temperature regulating channel of the battery pack 2 can be adjusted adaptively according to the actual temperature regulation requirements.

[0216] It is understood that this disclosure does not limit the temperature regulation method of the energy storage converter 3. Exemplarily, the temperature regulation channel of the energy storage converter 3 is provided in the third circulation loop 80.

[0217] In one embodiment, referring to FIG9, when the cooling system 6 is kept off, activating the temperature control system 8 and the cooler 90 of the second heat dissipation device 9 further includes:

[0218] Step S202: Open the valve in the temperature control system while keeping the cooling system closed.

[0219] For example, valve 12 and the temperature control channel of energy storage converter 3 are connected in series in the second pipeline 82 of temperature control system 8.

[0220] In the embodiments of this disclosure, a valve 12 is provided in the second pipeline 82 of the temperature control system 8. By closing the valve 12, the flow of cooling medium through the temperature control channel of the energy storage converter 3 can be stopped, thereby alleviating the temperature control pressure of the second heat dissipation device 9 on the temperature control system 8 when the temperature of the energy storage converter 3 is not required, and reducing energy consumption to a certain extent.

[0221] It is understood that this disclosure does not limit whether valve 12 is installed in the second pipeline 82.

[0222] In one embodiment, referring to Figure 8, the operating mode is a second operating mode in which the battery pack 2 discharges to the charging connector 5 through the charging inverter 4. The temperature control objects corresponding to the second operating mode also include the charging connector 5 and the charging inverter 4. According to the operating mode, at least the temperature control system 8 is activated, including:

[0223] Step S21: Start the cooling system, temperature control system, and the cooler of the second heat dissipation device.

[0224] In this embodiment of the scheme, during the charging and discharging process of 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 operation and generate a certain amount of heat. Based on actual usage requirements, the required temperature of the cooling medium for the charging connector 5 is similar to that required by the charging converter 4. Temperature regulation can be effectively achieved through the cooling system 6, the temperature control system 8, and the cooler 90.

[0225] In one embodiment, referring to Figure 10, the temperature control object corresponding to the second operating mode also includes the energy storage converter 3, and the cooler 90 of the cooling system 6, temperature control system 8, and second heat dissipation device 9 is activated, including:

[0226] Step S210: Start the first and second circulation pumps of the cooling system to cool the charging converter and charging connector;

[0227] Step S211: Start the compressor in the refrigeration unit of the second heat dissipation device to cool the third circulation loop of the temperature control system;

[0228] Step S212: Start the third circulation pump in the temperature control system.

[0229] For example, the heat dissipation channel corresponding to the second heat dissipation device 9, the temperature regulating channel of the battery pack 2, and the third circulation pump 81 are connected in series in the third circulation loop 80 of the temperature regulating system 8. The temperature regulating channel of the energy storage converter 3 is provided in the second pipeline 82 of the temperature regulating system 8. The second pipeline 82 is connected in parallel with the temperature regulating channel of the battery pack 2, and the second pipeline 82 is connected in series with the third circulation pump 81.

[0230] In this embodiment of the present disclosure, the required temperature of the cooling medium for the battery pack 2 is similar to that required by the energy storage converter 3. Sharing the temperature control system 8 with the energy storage converter 3 allows for better utilization of the heat dissipation capacity of the heat dissipation system and the second heat dissipation device 9.

[0231] In one embodiment, referring to FIG10, the refrigerator 90 of the cooling system 6, temperature control system 8, and second heat dissipation device 9 is activated, and the system further includes:

[0232] Step S213: Open the valve set in the temperature control system 8.

[0233] For example, valve 12 and the temperature control channel of energy storage converter 3 are connected in series in the second pipeline 82 of temperature control system 8.

[0234] In this embodiment of the present disclosure, a valve 12 is provided in the second pipeline 82 of the temperature control system 8. By closing the valve 12, the flow of cooling medium through the temperature control channel of the energy storage converter 3 can be stopped, thereby alleviating the temperature control pressure of the second heat dissipation device 9 on the temperature control system 8 when the temperature of the energy storage converter 3 is not required, and reducing energy consumption to a certain extent.

[0235] It is understood that the embodiments of this disclosure are not limited to activating the first circulation pump 11, the second circulation pump 612, the cooler 90, the third circulation 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, both the battery pack 2 and the energy storage converter 3 are housed in the cooling system 6. Cooling of the charging converter 4, the charging connector 5, the battery pack 2, and the energy storage converter 3 is achieved by activating the first circulation pump 11 and the second circulation pump 612.

[0236] In one embodiment, referring to Figure 8, the operating mode is a sleep mode. Based on this operating mode, at least the temperature control system 8 is activated, including:

[0237] Step S22: Start the temperature control system while keeping the cooling system off.

[0238] Hibernation mode refers to the operating mode in which the battery pack 2, charging inverter 4, and charging connector 5 are all in a closed state.

[0239] For example, when the energy storage device includes an energy storage converter 3, and the energy storage device is in hibernation mode, the energy storage converter 3 is also in a turned-off state.

[0240] In the embodiments of this disclosure, when the operating mode is sleep mode, the cooling system 6 is turned off and the temperature control system 8 is started. When the operating mode is sleep mode, the battery pack 2, charging connector 5, and charging inverter 4 are not working. However, the battery pack 2 has certain temperature requirements during the startup process, and the battery pack 2 will have a long service life if it is kept at an unsuitable temperature. By starting the temperature control system 8, the battery pack 2 can be adjusted to a suitable temperature.

[0241] In one embodiment, referring to Figure 11, activating the temperature control system 8 while the cooling system 6 remains off includes:

[0242] Step S220: Start the third circulation pump in the temperature control system while keeping the cooling system off;

[0243] Step S221: Close the valve installed in the temperature control system while keeping the cooling system closed.

[0244] For example, the temperature regulating channel of the battery pack 2 and the third circulation pump 81 are connected in series in the third circulation loop 80 of the temperature regulating system 8, and the second heat dissipation device is installed in the third circulation loop 80.

[0245] For example, valve 12 and the temperature regulating channel of energy storage converter 3 are connected in series in the second pipeline 82 in temperature regulating system 8, the second pipeline 82 is connected in parallel with the temperature regulating channel of battery pack 2, and the second pipeline 82 is connected in series with the third circulating pump 81.

[0246] In the embodiments of this disclosure, when the operating mode is sleep mode, the cooling system 6 is turned off and the temperature control system 8 is started. When the operating mode is sleep mode, the battery pack 2, charging connector 5, and charging inverter 4 are not working. However, the battery pack 2 has certain temperature requirements during the startup process, and the battery pack 2 will have a long service life if it is kept at an unsuitable temperature. By starting the temperature control system 8, the battery pack 2 can be adjusted to a suitable temperature.

[0247] In one embodiment, referring to Figures 1 and 2, the temperature control method further includes:

[0248] Step S23: With the cooling system closed, start the compressor in the refrigeration unit of the second heat dissipation device to cool the third circulation loop of the temperature control system.

[0249] In the embodiments of this disclosure, when the ambient temperature is higher than the normal start-up temperature of the battery pack 2, the compressor 900 in the cooler 90 of the second heat dissipation device 9 can be activated to cool the battery pack 2 so that the temperature of the battery pack 2 is close to the normal operating temperature.

[0250] In one embodiment, referring to Figure 12, the temperature control method further includes:

[0251] Step S24: With the cooling system closed, start the heater installed in the third circulation loop to heat the third circulation loop of the temperature control system.

[0252] In the embodiments of this disclosure, when the ambient temperature is lower than the normal start-up temperature of the battery pack 2, the heater 83 installed in the third circulation loop 80 can be activated 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.

[0253] It is understood that the embodiments disclosed herein do not limit the operating state of the third circulation pump 81 when the operating mode is in sleep mode. The third circulation pump 81 may be in an on state or in a off state.

[0254] In one embodiment, referring to Figure 6, the temperature control method further includes:

[0255] Step S3: Start the fan for heat dissipation.

[0256] For example, the fan 10 is installed in the cabinet 1.

[0257] In the embodiments of this disclosure, by starting the fan 10 to dissipate heat from the first heat dissipation device 7 and the second heat dissipation device 9, the air can be driven to flow rapidly, thereby quickly carrying the heat out of the cabinet 1 from the energy storage device, and the heat dissipation capacity of the energy storage device is high.

[0258] The above are merely preferred embodiments of this disclosure and are not intended to limit the scope of this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A power storage device having at least a first working mode, a second working mode and a hibernation mode, comprising: a cabinet having a power storage interface; a battery pack installed in the cabinet, the battery pack being electrically connected to the power storage interface; a charging converter electrically connected to the battery pack to convert electrical energy inputted or outputted by the battery pack; a charging connector electrically connected to the charging converter to transmit electrical energy converted by the charging converter; a cooling system for heat exchange with the charging converter and the charging connector; a first heat dissipation device provided in the cooling system; a temperature regulating system for heat exchange with the battery pack, the cooling system and the temperature regulating system being thermally separated; a second heat dissipation device provided in the temperature regulating system; a controller configured to keep the cooling system off and start the temperature regulating system in the first working mode, configured to start the cooling system and the temperature regulating system in the second working mode, and configured to keep the cooling system off and start the temperature regulating system in the hibernation mode.

2. The energy storage device of claim 1, wherein, The first heat dissipation device is a cooling container for containing cooling medium, a space in the cooling container for containing cooling medium is provided in the cooling system, the cooling container exchanges heat with air, and the second heat dissipation device comprises a refrigerator and a first heat exchanger, the first heat exchanger being arranged across the refrigerator and the temperature regulating system.

3. The energy storage device of claim 2, wherein, The refrigerator comprises a compressor, a condenser, an expansion valve and an evaporator connected in sequence, and the first heat exchanger is arranged across the evaporator and the temperature regulating system.

4. The energy storage device of claim 3, wherein, The power storage device further comprises at least one fan, the fan being installed in the cabinet, the fan being configured to dissipate heat from the condenser and the cooling container, and the projection area of the condenser and the projection area of the cooling container being staggered with respect to each other along the projection direction of the fan.

5. The energy storage device of claim 4, wherein, The projection area of each fan is arranged across the projection area of the condenser and the projection area of the cooling container along the projection direction of the fan.

6. The energy storage device of claim 4 or 5, wherein, 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, wherein The power storage device further comprises a first circulating pump, and the cooling system comprises: a first circulating loop, the first circulating pump and the cooling flow channel of the charging converter being connected in series in the first circulating loop; a sub-cooling system, the cooling flow channel of the charging connector being provided in the sub-cooling system, the sub-cooling system comprising a first pipeline, the first pipeline being connected in series with the first circulating pump, the first pipeline being connected in parallel with the cooling flow channel of the charging converter, and the first heat dissipation device being provided in at least one of the first circulating loop and the sub-cooling system to cool the charging connector and the charging converter.

8. The energy storage device of claim 7, wherein, The sub-cooling system further comprises a second heat exchanger, a second circulating pump and a second circulating loop, one heat exchange channel of the second heat exchanger is arranged in the first pipeline, the cooling flow channel of the charging connector, the second circulating pump and the other heat exchange channel of the second heat exchanger are connected in series in the second circulating loop, the second circulating loop is isolated from the first pipeline, and the first heat dissipation device is arranged in at least one of the first circulating loop, the heat exchange channel of the second heat exchanger and the second circulating loop.

9. The energy storage device according to any one of claims 1 to 8, wherein The temperature adjusting system comprises a third circulating loop and a third circulating pump, the temperature adjusting flow channel of the battery pack and the third circulating pump are connected in series in the third circulating loop, and the second heat dissipation device is arranged in the third circulating loop.

10. The energy storage device of claim 9, wherein, The energy storage device further comprises an energy storage converter, the energy storage converter is electrically connected with the battery pack and the energy storage interface respectively to convert the input or output electric energy of the battery pack, the temperature adjusting system further comprises a second pipeline, the second pipeline is connected in parallel with the temperature adjusting flow channel of the battery pack, the second pipeline is connected in series with the third circulating pump, and the temperature adjusting flow channel of the energy storage converter is arranged in the second pipeline.

11. The energy storage device of claim 10, wherein, The energy storage device further comprises a valve, the valve is connected in series with the temperature adjusting flow channel of the energy storage converter in the second pipeline.

12. The energy storage device according to any one of claims 9 to 11, wherein The temperature adjusting system further comprises a heater, and the heater is arranged in the third circulating loop.

13. A temperature adjusting method for an energy storage device, comprising: obtaining a working mode of an energy storage device, each working mode corresponding to a temperature adjusting object at least including a battery pack; starting at least a temperature adjusting system according to the working mode, the temperature adjusting system being used for heat exchange with the battery pack, a cooling system being thermally separated from the temperature adjusting system, the cooling system being used for heat exchange with a charging converter and a charging connector, a first heat dissipation device being arranged in the cooling system, a second heat dissipation device being arranged in the temperature adjusting system, the charging converter being electrically connected with the battery pack and the charging connector respectively, when the working mode is a first working mode of charging the battery pack, the cooling system is in a closed state and the temperature adjusting system is in an open state, when the working mode is a second working mode of discharging the battery pack to the charging connector through the charging converter, the cooling system and the temperature adjusting system are both in the open state, and when the working mode is a sleep mode, the cooling system is in the closed state and the temperature adjusting system is in the open state.

14. The tempering method of claim 13, wherein, When the working mode is the first working mode of charging the battery pack, starting at least the temperature adjusting system according to the working mode, comprising: starting a refrigerating machine of the second heat dissipation device in the state that the cooling system remains closed.

15. The tempering method of claim 14, wherein, When the working mode is the first working mode of charging the battery pack, starting at least the temperature adjusting system according to the working mode, comprising: starting a compressor refrigeration in the refrigerating machine of the second heat dissipation device to cool a third circulating loop of the temperature adjusting system in the state that the cooling system remains closed. starting a third circulating pump in the temperature regulation system in a state that the cooling system remains closed, the temperature regulation flow channel of the battery pack and the third circulating pump being in series in a third circulating loop of the temperature regulation system, the second heat dissipation device being arranged in the third circulating loop, the temperature regulation flow channel of the energy storage converter being arranged in a second pipeline of the temperature regulation system, the second pipeline being in parallel with the temperature regulation flow channel of the battery pack, and the second pipeline being in series with the third circulating pump.

16. The tempering method of claim 15, wherein, starting the temperature regulation system and the refrigeration device of the second heat dissipation device in a state that the cooling system remains closed, and further comprising: opening a valve arranged in the temperature regulation system in a state that the cooling system remains closed, the valve being in series with the temperature regulation flow channel of the energy storage converter in a second pipeline of the temperature regulation system.

17. The tempering method according to any one of claims 13 to 16, wherein the working mode is a second working mode in which the battery pack discharges to the charging connector through the charging converter, the temperature regulation object corresponding to the second working mode further comprising the charging connector and the charging converter, and according to the working mode, at least the temperature regulation system is started, comprising: starting the cooling system, the temperature regulation system and the refrigeration device of the second heat dissipation device.

18. The tempering method of claim 17, wherein, the temperature regulation object corresponding to the second working mode further comprising the energy storage converter, starting the cooling system, the temperature regulation system and the refrigeration device of the second heat dissipation device, comprising: starting the first circulating pump and the second circulating pump of the cooling system to cool the charging converter and the charging connector; starting the compressor refrigeration in the refrigeration device of the second heat dissipation device to cool the third circulating loop of the temperature regulation system; starting a third circulating pump in the temperature regulation system in a state that the cooling system remains closed, the temperature regulation flow channel of the battery pack and the third circulating pump being in series in a third circulating loop of the temperature regulation system, the second heat dissipation device being arranged in the third circulating loop, the temperature regulation flow channel of the energy storage converter being arranged in a second pipeline of the temperature regulation system, the second pipeline being in parallel with the temperature regulation flow channel of the battery pack, and the second pipeline being in series with the third circulating pump.

19. The tempering method of claim 18, wherein, starting the cooling system, the temperature regulation system and the refrigeration device of the second heat dissipation device, and further comprising: opening a valve arranged in the temperature regulation system, the valve being in series with the temperature regulation flow channel of the energy storage converter in a second pipeline of the temperature regulation system.

20. The tempering method according to any one of claims 13 to 19, wherein the working mode is a sleep mode, and according to the working mode, at least the temperature regulation system is started, comprising: starting the temperature regulation system in a state that the cooling system remains closed.

21. The tempering method of claim 20, wherein, starting the temperature regulation system in a state that the cooling system remains closed, comprising: starting a third circulating pump in the temperature regulation system in a state that the cooling system remains closed, the temperature regulation flow channel of the battery pack and the third circulating pump being in series in a third circulating loop of the temperature regulation system, the second heat dissipation device being arranged in the third circulating loop; closing a valve arranged in the temperature regulation system in a state that the cooling system remains closed, the valve being in series with the temperature regulation flow channel of the energy storage converter in a second pipeline of the temperature regulation system, the second pipeline being in parallel with the temperature regulation flow channel of the battery pack, and the second pipeline being in series with the third circulating pump.

22. The tempering method of claim 21, wherein, the temperature regulation method further comprising: starting a compressor refrigeration in a refrigeration unit of the second heat sink to cool the third circulation loop of the temperature control system while the cooling system remains closed.

23. The tempering method of claim 21 or 22, wherein, The temperature control method further comprises: starting a heater provided in the third circulation loop to heat the third circulation loop of the temperature control system while the cooling system remains closed.

24. The tempering method according to any one of claims 13 to 23, wherein The temperature control method further comprises: starting a fan to dissipate heat.

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