Energy storage device

Abstract

The present disclosure belongs to the technical field of energy storage. Provided in the embodiments are an energy storage device. A battery pack is mounted in a cabinet body. A charging converter is electrically connected to the battery pack, and the charging converter is used for converting electric energy input into or output by the battery pack. A charging connector is electrically connected to the charging converter to transmit the electric energy converted by the charging converter. A temperature regulation flow channel of the battery pack and a temperature regulation flow channel of the charging converter are both arranged in a first circulation unit. A second circulation unit is isolated from the first circulation unit, a temperature regulation flow channel of the charging connector being provided in the second circulation unit. A first heat exchanger at least spans the first circulation unit and the second circulation unit. A heat dissipation device is provided in one of the first circulation unit, the second circulation unit and the first heat exchanger.

Description

An energy storage device

[0001] Cross-references to related applications

[0002] This disclosure is based on and claims priority to Chinese Patent Application No. 202421713408.9, filed on July 19, 2024, entitled “An Energy Storage Device”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to the field of energy storage technology, specifically to an energy storage device. Background Technology

[0004] New energy batteries are being used more and more widely in daily life and industry. For example, new energy vehicles equipped with batteries are already widely used. In addition, batteries are being used more and more in the field of energy storage.

[0005] The energy storage device houses a battery pack within its cabinet, which supplies power to a charging connector, enabling the connector to charge electric vehicles and other electrical devices. In related technologies, the heat dissipation device of the energy storage device occupies a significant amount of space. Summary of the Invention

[0006] In view of this, embodiments of the present disclosure aim to provide an energy storage device that reduces the space occupied by the heat dissipation device of the energy storage device.

[0007] To achieve the above objectives, the technical solution of this disclosure embodiment is implemented as follows:

[0008] This disclosure provides an energy storage device, including:

[0009] Cabinet;

[0010] The battery pack is installed inside the cabinet;

[0011] A charging converter is electrically connected to the battery pack and is used to convert the electrical energy input or output of the battery pack.

[0012] The charging connector is electrically connected to the charging converter to transmit the electrical energy converted by the charging converter.

[0013] The temperature regulation channels of the battery pack and the charging converter are both located in the first cycle unit.

[0014] The second circulating unit is isolated from the first circulating unit, and the temperature regulating channel of the charging connector is located in the second circulating unit.

[0015] The first heat exchanger is installed across at least the first and second circulating units;

[0016] A heat dissipation device is installed in one of the first circulating unit, the second circulating unit, and the first heat exchanger.

[0017] In this embodiment of the disclosure, the first circulating unit and the second circulating unit exchange heat through the first heat exchanger. The first circulating unit and the second circulating unit do not need to be equipped with corresponding heat dissipation devices, which reduces the number of heat dissipation devices in the cabinet and helps to reduce the space occupied by the heat dissipation devices in the cabinet.

[0018] In one embodiment, the heat dissipation device is disposed in the first circulation unit.

[0019] In this embodiment of the disclosure, the temperature of the battery pack can be adjusted during the process of adjusting the temperature of the charging connector.

[0020] In one embodiment, the heat dissipation device is a cooler, and the first circulation unit includes:

[0021] First flow channel system;

[0022] The first circulating pump, the temperature regulating channel of the battery pack, the temperature regulating channel of the charging converter and the first circulating pump are set in the first channel system;

[0023] The second heat exchanger is located across the first flow channel system and the refrigerator.

[0024] In this embodiment of the disclosure, as the first circulating pump continuously circulates the temperature-regulating medium within the first flow channel system, the temperature-regulating medium can repeatedly exchange heat between the battery pack and the charging converter.

[0025] In one embodiment, the cabinet has an energy storage interface, and the energy storage device further includes an energy storage converter. The energy storage converter is electrically connected to the battery pack and the energy storage interface to convert the electrical energy input to or output from the battery pack. The first flow channel system includes:

[0026] The main flow channel, the corresponding heat exchange flow channel of the second heat exchanger, the corresponding heat exchange flow channel of the first heat exchanger, and the first circulating pump are connected in series in the main flow channel;

[0027] The auxiliary flow channel is connected to the main flow channel at both ends. The input end of the auxiliary flow channel is connected to the output end of the corresponding flow channel of the first heat exchanger, the output end of the auxiliary flow channel is connected to the input end of the corresponding flow channel of the second heat exchanger, and the output end of the corresponding flow channel of the second heat exchanger is connected to the input end of the corresponding flow channel of the first heat exchanger. The temperature regulating flow channels of the battery pack, the energy storage converter, and the charging converter are all located on the auxiliary flow channel.

[0028] In this embodiment, the first flow channel system first removes the heat generated by the charging interface, and then removes the heat generated by the battery pack, energy storage converter and charging converter. The temperature regulating medium at the output end of the second heat exchanger has a large cooling capacity. The temperature regulating medium first flows through the output end of the first heat exchanger, and the temperature difference between the two ends is large, which can quickly remove heat and rapidly cool the charging connector. This allows the charging connector to pass through circuit components with a small cross-sectional area, reducing the size of the charging connector.

[0029] In one embodiment, there is one auxiliary flow channel, and the temperature regulating flow channel of the battery pack, the temperature regulating flow channel of the energy storage converter, and the temperature regulating flow channel of the charging converter are all connected in series to the auxiliary flow channel.

[0030] In this embodiment of the disclosure, a temperature-regulating medium flows through the battery pack, and a temperature-regulating medium also flows through the energy storage converter and the charging converter, thereby regulating the temperature of the battery pack, the energy storage converter, and the charging converter together.

[0031] In one embodiment, the energy storage converter is an AC-DC bidirectional converter, and the charging converter is a DC converter.

[0032] In this embodiment of the disclosure, the AC-DC bidirectional converter can convert AC power into DC power, enabling the external power grid to charge the energy storage device. The DC converter can change the output voltage of the charging connector so that the voltage output by the charging connector is suitable for the electrical device.

[0033] In one embodiment, both the charging converter and the energy storage converter are housed within a cabinet.

[0034] In this embodiment, the charging converter and energy storage converter are installed by making reasonable use of the space inside the cabinet, so that the charging converter and energy storage converter are not exposed and occupy external space. In one embodiment, the cooler includes:

[0035] Evaporator, located in the second heat exchanger;

[0036] The compressor's input end is connected to the evaporator's output end;

[0037] The condenser's input end is connected to the compressor's output end;

[0038] The fan is installed in the cabinet and is used to cool the condenser.

[0039] The expansion valve has its input end connected to the output end of the condenser and its output end connected to the evaporator.

[0040] In this embodiment, the charging connector, battery pack, and converter generate a lot of heat, the cooler has high cooling efficiency, good cooling effect, and relatively stable cooling performance.

[0041] In one embodiment, the medium circulating in the first circulating unit is water, and / or the medium circulating in the second circulating unit is oil.

[0042] In this embodiment, oil has insulating properties, and using oil to regulate the temperature of the charging connector improves the safety of the charging connector. Water is used to regulate the temperature of the battery pack, charging converter, and energy storage converter; water has a high thermal conductivity and a fast heat transfer rate, thus accelerating the temperature regulation efficiency of the battery pack, charging converter, and energy storage converter.

[0043] In one embodiment, a heat dissipation device is disposed above the battery pack.

[0044] In this embodiment of the disclosure, the impact of heat dissipation device heat on the battery pack is reduced.

[0045] In the energy storage device of this embodiment, the first circulation unit and the second circulation unit are isolated from each other. The first heat exchanger is at least spanned across the first circulation unit and the second circulation unit. The first circulation unit and the second circulation unit exchange heat through the first heat exchanger. Both the first circulation unit and the second circulation unit can be affected by the temperature regulation of the heat dissipation device. The first circulation unit and the second circulation unit do not need to be equipped with corresponding heat dissipation devices separately. The heat dissipation device is installed in one of the first circulation unit, the second circulation unit and the first heat exchanger, which reduces the number of heat dissipation devices in the cabinet and helps to reduce the space occupied by the heat dissipation devices in the cabinet. Attached Figure Description

[0046] 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:

[0047] Figure 1 is a schematic diagram of the connection of the energy storage device according to an embodiment of the present disclosure. In the figure, the temperature regulation channel of the battery pack, the temperature regulation channel of the energy storage converter and the temperature regulation channel of the charging converter are all connected in series to the auxiliary channel.

[0048] Figure 2 is a schematic diagram of the connection of the energy storage device according to an embodiment of the present disclosure. In the figure, the temperature regulation channel of the battery pack, the temperature regulation channel of the energy storage converter and the temperature regulation channel of the charging converter are all connected in parallel to the auxiliary channel.

[0049] Figure 3 is a circuit connection diagram of a portion of the energy storage device according to an embodiment of this disclosure.

[0050] Explanation of reference numerals in the attached drawings: 1. Charging converter; 11. Energy storage converter; 2. Battery pack; 3. Charging connector; 4. First circulation unit; 41. First circulation pump; 42. Main flow channel; 43. Auxiliary flow channel; 44. Expansion tank; 45. Heater; 5. Second circulation unit; 51. Second circulation pump; 52. Oil reservoir; 6. First heat exchanger; 7. Second heat exchanger; 8. Heat dissipation device; 81. Fan; 82. Compressor; 83. Condenser; 84. Expansion valve; 85. Evaporator; 9. Energy storage interface. Detailed Implementation

[0051] 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.

[0052] 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 be limiting of this disclosure; the terms “comprising” and “having” and any variations thereof in embodiments of this disclosure are intended to cover non-exclusive inclusion.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] In related technologies, the battery pack inside the cabinet of an energy storage device charges electric vehicles and other electrical devices via a charging connector. During operation, the battery pack, charging inverter, and charging connector all generate heat. The battery pack is typically housed within the cabinet, while the charging connector usually needs to be exposed to the outside environment for use. The battery pack and charging inverter are housed in one circulating unit, and the charging connector is housed in another. Each circulating unit is equipped with a corresponding heat dissipation device. During the charging process, the two circulating units dissipate heat through their respective heat dissipation devices to cool the battery pack, charging inverter, and charging connector. Due to the numerous heat dissipation devices, the heat dissipation devices within the cabinet of the energy storage device occupy a significant amount of space.

[0059] This disclosure provides an energy storage device, which includes a battery pack 2, a charging converter 1, a charging connector 3, a first circulating unit 4, a second circulating unit 5, a first heat exchanger 6, and a heat dissipation device 8. The temperature regulating channels of the battery pack 2 and the charging converter 1 are both located in the first circulating unit 4, and the temperature regulating channel of the charging connector 3 is located in the second circulating unit 5. The first heat exchanger 6 is connected across the first circulating unit 4 and the second circulating unit 5. The first circulating unit 4 and the second circulating unit 5 share the heat dissipation device 8, which can reduce the size of the energy storage device.

[0060] The energy storage device in this embodiment is used to store electricity to charge electrical devices.

[0061] Electrical devices are devices that use electrical energy as their energy source to perform corresponding functions by consuming electrical energy. For example, electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0062] The energy storage device of this embodiment, as shown in Figures 1, 2, and 3, includes a cabinet, a battery pack 2, a charging converter 1, a charging connector 3, a first circulation unit 4, a second circulation unit 5, a first heat exchanger 6, and a heat dissipation device 8. The battery pack 2 is installed inside the cabinet. The charging converter 1 is electrically connected to the battery pack 2 and is used to convert the electrical energy input or output from the battery pack 2. The charging connector 3 is electrically connected to the charging converter 1 to transmit the electrical energy converted by the charging converter 1. The temperature regulating channels of the battery pack 2 and the charging converter 1 are both located in the first circulation unit 4. The second circulation unit 5 is isolated from the first circulation unit 4. The temperature regulating channel of the charging connector 3 is located in the second circulation unit 5. The first heat exchanger 6 is at least spanned across the first circulation unit 4 and the second circulation unit 5. The heat dissipation device 8 is located in one of the first circulation unit 4, the second circulation unit 5, and the first heat exchanger 6.

[0063] For example, the energy storage device includes one or at least two battery packs 2. When the energy storage device includes at least two battery packs 2, the at least two battery packs 2 are connected in parallel to increase the capacity of the energy storage device.

[0064] Battery pack 2 includes a housing and individual battery cells.

[0065] The number of battery cells can be at least two. These at least two battery cells can be directly connected in series, parallel, or in a hybrid configuration, and then the assembly of the at least two battery cells is placed in a housing. A hybrid configuration refers to at least two battery cells being connected in both series and parallel configurations. At least two battery cells can first be connected in series, parallel, or in a hybrid configuration to form a battery module, and then these at least two battery modules can be connected in series, parallel, or in a hybrid configuration to form a whole, which is then placed in a housing. The battery pack 2 may also include other structures; for example, it may include a busbar component for electrical connection between the at least two battery cells.

[0066] The battery cells in battery pack 2 are secondary batteries. Secondary batteries are battery cells that can be recharged to activate the active materials and continue to be used after the battery cells have been discharged.

[0067] A single battery cell includes a casing, electrode assembly, positive and negative terminals, and a separator.

[0068] The outer casing can be a sealed structure or a non-sealed structure. For example, when the outer casing is a non-sealed structure, it serves to protect the electrode assembly, and a sealing bag is included between the outer casing and the electrode assembly to encapsulate the electrode assembly and electrolyte. Specifically, the sealing bag can be a bag-shaped insulating component and an aluminum-plastic film.

[0069] The electrode assembly can be a wound structure or a stacked structure.

[0070] For example, the energy storage device also includes a main control module, which can serve as the battery management unit of the battery pack 2 for monitoring and managing the battery pack 2. The main control module can monitor information such as the current, voltage, power, or temperature of the battery pack 2.

[0071] For example, the energy storage device also includes a central control module, which can serve as the battery management unit of the energy storage device. The central control module is used to monitor and manage the energy storage device. The central control module can monitor information such as the current, voltage, power, state of charge, or temperature of the energy storage device.

[0072] For example, the energy storage device also includes a fire suppression module, which includes a control panel, detectors and alarm devices, and is used to detect, alarm or extinguish fires in the energy storage device.

[0073] The charging converter 1 is a converter used to convert the electrical energy input or output between the battery pack 2 and the charging interface.

[0074] A converter is an electrical device that changes the voltage, frequency, number of phases, and other electrical quantities or characteristics of a power supply system.

[0075] During use, the charging connector 3 is electrically connected to the electrical device, transferring electrical energy to the electrical device.

[0076] The first heat exchanger 6 is used for heat exchange between the first circulating unit 4 and the second circulating unit 5.

[0077] A heat exchanger is a device that enables heat transfer between two or more fluids at different temperatures, allowing heat to be transferred from a higher-temperature fluid to a lower-temperature fluid.

[0078] The heat dissipation device 8 is a device used to transfer, release and absorb heat.

[0079] The charging connector 3 is at least partially located on the outside of the cabinet, or all of the charging connector 3 is located on the outside of the cabinet.

[0080] For example, the number of charging connectors 3 is at least two.

[0081] For example, the electrical device is an electric vehicle, and the charging connector 3 is a charging gun.

[0082] For example, the number of heat dissipation devices 8 is one.

[0083] The isolation between the first circulating unit 4 and the second circulating unit 5 means that the temperature regulating medium in the temperature regulating channel of the first circulating unit 4 and the temperature regulating medium in the temperature regulating channel of the second circulating unit 5 do not flow between them.

[0084] The temperature regulating medium corresponding to the first circulating unit 4 circulates within the first circulating unit 4.

[0085] The temperature regulating medium corresponding to the first circulating unit 4 circulates between the temperature regulating channel of the battery pack 2 and the temperature regulating channel of the charging converter 1.

[0086] The temperature-regulating medium corresponding to the second circulation unit 5 circulates within the second circulation unit 5. The temperature-regulating medium circulating within the second circulation unit 5 flows through the charging connector 3 to regulate the temperature of the charging connector 3.

[0087] The statement that the heat dissipation device 8 is located in one of the first circulating unit 4, the second circulating unit 5, and the first heat exchanger 6 means that the heat dissipation device 8 is located in the first circulating unit 4, the second circulating unit 5, or the first heat exchanger 6. If the heat dissipation device 8 is located in one of the first circulating unit 4, the second circulating unit 5, and the first heat exchanger 6, then the other two of the first circulating unit 4, the second circulating unit 5, and the first heat exchanger 6 will not have heat dissipation devices 8 installed.

[0088] For example, when the heat dissipation device 8 is installed in the first circulation unit 4, the heat dissipation device 8 is no longer installed in the second circulation unit 5 and the first heat exchanger 6.

[0089] The first heat exchanger 6 is installed across the first circulating unit 4 and the second circulating unit 5. One of the heat exchange channels of the first heat exchanger 6 is located in the first circulating unit 4. The temperature-regulating medium circulating in the first circulating unit 4 flows through the corresponding heat exchange channel of the first heat exchanger 6. The other heat exchange channel of the first heat exchanger 6 is located in the second circulating unit 5. The temperature-regulating medium circulating in the second circulating unit 5 flows through the corresponding heat exchange channel of the first heat exchanger 6.

[0090] In the energy storage device of this embodiment, the first circulation unit 4 and the second circulation unit 5 are isolated from each other. The first heat exchanger 6 is at least spanned across the first circulation unit 4 and the second circulation unit 5. The first circulation unit 4 and the second circulation unit 5 exchange heat through the first heat exchanger 6. Both the first circulation unit 4 and the second circulation unit 5 can be affected by the temperature regulation of the heat dissipation device 8. The first circulation unit 4 and the second circulation unit 5 do not need to be equipped with corresponding heat dissipation devices 8 respectively. The heat dissipation device 8 is set in one of the first circulation unit 4, the second circulation unit 5 and the first heat exchanger 6, which reduces the number of heat dissipation devices 8 in the cabinet and helps to reduce the space occupied by the heat dissipation devices 8 in the cabinet.

[0091] In one embodiment, referring to Figures 1 and 2, the heat dissipation device 8 is disposed on the first circulation unit 4.

[0092] It should be noted that the heat dissipation device 8 is installed in the first circulating unit 4, while the second circulating unit 5 and the first heat exchanger 6 are not equipped with the heat dissipation device 8.

[0093] For example, the temperature control channels of the charging connector 3, the battery pack 2, and the charging converter 1 are all connected to the corresponding heat exchange channels of the first heat exchanger 6.

[0094] In this embodiment, the heat from the charging connector 3 is transferred to the temperature regulating channel of the first circulating unit 4 through the first heat exchanger 6. The heat dissipation device 8 is disposed in the first circulating unit 4. During the temperature regulation of the charging connector 3, the temperature regulating medium circulating in the first circulating unit 4 has the power to flow through the temperature regulating channels of the battery pack 2 and the charging converter 1. When the temperature regulating channels of the charging connector 3, the battery pack 2 and the charging converter 1 are all connected to the corresponding heat exchange channels of the first heat exchanger 6, the temperature regulating medium circulates in the corresponding heat exchange channels of the first heat exchanger 6, the battery pack 2 and the charging converter 1. During the temperature regulation of the charging connector 3, the temperature regulation of the battery pack 2 can be achieved.

[0095] It is understood that the heat dissipation device 8 is not limited to being installed in the first circulating unit 4. For example, the heat dissipation device 8 is installed in the first heat exchanger 6, but the second circulating unit 5 and the first circulating unit 4 do not have the heat dissipation device 8 installed. For example, the heat dissipation device 8 is installed in the second circulating unit 5, but the first heat exchanger 6 and the first circulating unit 4 do not have the heat dissipation device 8 installed.

[0096] In one embodiment, please refer to Figures 1 and 2. The heat dissipation device 8 is a cooler. The first circulation unit 4 includes a first flow channel system, a first circulation pump 41, and a second heat exchanger 7. The temperature regulating flow channel of the battery pack 2, the temperature regulating flow channel of the charging converter 1, and the first circulation pump 41 are disposed in the first flow channel system. The second heat exchanger 7 is disposed across the first flow channel system and the cooler.

[0097] Refrigeration is the process of making the internal temperature lower than the ambient temperature, and the cooling temperature is not limited by the ambient temperature.

[0098] The second heat exchanger 7 is disposed across the first flow channel system and the refrigerator. One of the heat exchange channels of the second heat exchanger 7 is disposed in the first flow channel system. The temperature regulating medium circulating in the first flow channel system flows through the corresponding heat exchange channel of the second heat exchanger 7. The other heat exchange channel of the second heat exchanger 7 is disposed in the refrigerator. The temperature regulating medium circulating in the refrigerator flows through the corresponding heat exchange channel of the second heat exchanger 7.

[0099] In this embodiment of the disclosure, as the first circulating pump 41 continuously circulates the temperature regulating medium within the first flow channel system, the temperature regulating medium can repeatedly exchange heat between the battery pack 2 and the charging converter 1, and then exchange the heat in the first flow channel system to the cooler through the second heat exchanger 7, and the cooler cools the heat.

[0100] It is understood that the heat dissipation device 8 is not limited to a cooler. For example, the heat dissipation device 8 is a medium container, which removes heat from the medium container by blowing away the heat with a fan.

[0101] In one embodiment, referring to Figures 1 and 2, the cabinet has an energy storage interface 9, and the energy storage device includes an energy storage converter 11. The energy storage converter 11 is electrically connected to the battery pack 2 and the energy storage interface 9 to convert the electrical energy input to or output from the battery pack 2. The first flow channel system includes a main flow channel 42 and an auxiliary flow channel 43. The corresponding heat exchange flow channel of the second heat exchanger 7, the corresponding heat exchange flow channel of the first heat exchanger 6, and the first circulating pump 41 are connected in series in the main flow channel 42. The auxiliary flow channel 43 is connected to the main flow channel 42. The flow channels 42 are connected end to end. The input end of the auxiliary flow channel 43 is connected to the output end of the corresponding heat exchange flow channel of the first heat exchanger 6. The output end of the auxiliary flow channel 43 is connected to the input end of the corresponding heat exchange flow channel of the second heat exchanger 7. The output end of the corresponding heat exchange flow channel of the second heat exchanger 7 is connected to the input end of the corresponding heat exchange flow channel of the first heat exchanger 6. The temperature regulating flow channel of the battery pack 2, the temperature regulating flow channel of the energy storage converter 11, and the temperature regulating flow channel of the charging converter 1 are all set on the auxiliary flow channel 43.

[0102] The energy storage converter 11 is a converter used to convert the electrical energy input or output between the battery pack 2 and the energy storage interface 9.

[0103] For example, the energy storage interface 9 is electrically connected to the external power grid.

[0104] In this embodiment, the corresponding heat exchange channel of the second heat exchanger 7, the corresponding heat exchange channel of the first heat exchanger 6, and the first circulating pump 41 are connected in series in the main channel 42. The temperature-regulating medium, after being converted by the second heat exchanger 7, is output from the output end of the second heat exchanger 7. The first circulating pump 41 circulates the temperature-regulating medium of the first channel system in the main channel 42 and the auxiliary channel 43 to transfer heat in the main channel 42 and the auxiliary channel 43 to the cooler. The input end of the auxiliary channel 43 is connected to the output end of the corresponding heat exchange channel of the first heat exchanger 6. The battery pack 2 is adjusted... The temperature regulating channels of the temperature flow channel, the energy storage converter 11, and the charging converter 1 are all located on the auxiliary flow channel 43. The output end of the first heat exchanger 6 transfers the heat from the charging connector 3 to the auxiliary flow channel 43. The temperature regulating medium in the auxiliary flow channel 43 first carries away the heat from the output end of the first heat exchanger 6, and then carries away the heat from the battery pack 2, the energy storage converter 11, and the charging converter 1. The output end of the auxiliary flow channel 43 is connected to the input end of the corresponding flow channel of the second heat exchanger 7. The heat is transferred to the second heat exchanger 7 through the output end of the auxiliary flow channel 43, and then transferred to the cooler by the second heat exchanger 7. The first flow channel system first removes the heat generated by the charging interface, and then removes the heat generated by the battery pack 2, the energy storage converter 11 and the charging converter 1. The temperature regulating medium at the output end of the second heat exchanger 7 has a large cooling capacity. The temperature regulating medium first flows through the output end of the first heat exchanger 6, and the temperature difference between the two ends is large, which can quickly remove the heat and rapidly cool down the charging connector 3. This allows the charging connector 3 to pass through circuit components with a small cross-sectional area, thus reducing the volume of the charging connector 3.

[0105] It is understandable that energy storage devices may not require an energy storage converter 11.

[0106] For example, an energy storage converter is installed on the external power grid to convert electrical energy input to or output from the external power grid.

[0107] In one embodiment, please refer to Figure 1. The number of auxiliary flow channels 43 is one. The temperature regulation flow channels of the battery pack 2, the energy storage converter 11, and the charging converter 1 are all connected in series in the auxiliary flow channel 43.

[0108] In this embodiment, the temperature regulating channels of the battery pack 2, the energy storage converter 11, and the charging converter 1 are all connected in series in the auxiliary channel 43. When a temperature regulating medium flows through the battery pack 2, a temperature regulating medium also flows through the energy storage converter 11 and the charging converter 1, thus regulating the temperature of the battery pack 2, the energy storage converter 11, and the charging converter 1 together.

[0109] In one embodiment, please refer to FIG2, the auxiliary flow channel 43 where the temperature regulating flow channel of the battery pack 2 is located, the auxiliary flow channel 43 where the temperature regulating flow channel of the energy storage converter 11 is located, and the auxiliary flow channel 43 where the temperature regulating flow channel of the charging converter 1 is located are connected in parallel.

[0110] In one embodiment, the energy storage device includes a heater 45, which is installed on the first circulating unit 4. The heat exchange channel of the heater 45 is connected in series with the auxiliary channel 43 where the temperature regulating channel of the battery pack 2 is located. Under low temperature conditions, when the battery pack 2 needs to start working, the heater 45 can heat the temperature regulating channel of the battery pack 2 to bring the temperature of the battery pack 2 to a temperature suitable for startup. When the battery pack 2 is charging or discharging, the heater 45 does not work.

[0111] In one embodiment, the energy storage converter 11 is an AC-DC bidirectional converter, and the charging converter 1 is a DC converter.

[0112] An AC-DC bidirectional converter is a converter that converts AC power to DC power or vice versa.

[0113] A DC converter is a converter that converts direct current into the required direct current.

[0114] For example, an AC-DC bidirectional converter is an AC / DC converter.

[0115] For example, a DC converter is a DC / DC converter.

[0116] In this embodiment of the disclosure, the AC-DC bidirectional converter can convert AC power into DC power, enabling the external power grid to charge the energy storage device. The DC converter can change the output voltage of the charging connector 3 so that the voltage output by the charging connector 3 is suitable for the electrical device.

[0117] In one embodiment, the refrigeration unit includes an evaporator 85, a compressor 82, a condenser 83, a fan 81, and an expansion valve 84. The evaporator 85 is disposed on the second heat exchanger 7. The input end of the compressor 82 is connected to the output end of the evaporator 85. The input end of the condenser 83 is connected to the output end of the compressor 82. The fan 81 is installed in the cabinet and is used to cool the condenser 83. The input end of the expansion valve 84 is connected to the output end of the condenser 83, and the output end of the expansion valve 84 is connected to the evaporator 85.

[0118] For example, an external temperature-regulating medium may be continuously introduced into the cooler and then flows out of the cooler to carry away heat.

[0119] For example, the refrigerator contains a temperature regulating medium that circulates within the refrigerator.

[0120] For example, fan 81 blows cold air toward condenser 83 to remove heat from condenser 83.

[0121] In this embodiment of the disclosure, during the operation of the energy storage device, the first circulation system transfers the heat generated by the battery pack 2, the energy storage converter 11, the charging converter 1, and the charging connector 3 to the second heat exchanger 7. The second heat exchanger 7 then transfers the heat from the first circulation system to the cooler. The battery pack 2, the energy storage converter 11, the charging converter 1, and the charging connector 3 generate a large amount of heat, which is cooled by the cooler. The cooler has high cooling efficiency, good cooling effect, and relatively stable cooling performance.

[0122] It is understood that the structure of the cooler is not limited. For example, the cooler is a semiconductor cooler.

[0123] In one embodiment, an evaporator 85 is disposed on a second heat exchanger 7. The evaporator 85 absorbs heat from the second heat exchanger 7 to evaporate the cooling fluid from liquid to gas for cooling. A compressor 82 compresses the cooling fluid flowing out of the evaporator 85. A condenser 83 cools the cooling fluid discharged from the compressor 82 from gas to liquid. A fan 81 is used to cool the condenser 83. An expansion valve 84 reduces the pressure of the cooling fluid after it has been cooled by the condenser 83, so that the cooling fluid can re-enter the evaporator 85 to absorb heat from the second heat exchanger 7, thereby realizing the circulation of the cooling fluid within the heat dissipation device 8.

[0124] In one embodiment, the medium circulating in the first circulating unit 4 is water, and / or the medium circulating in the second circulating unit 5 is oil.

[0125] It should be noted that the oil in this embodiment is a non-conductive oil, such as edible oil, lubricating oil, or gasoline.

[0126] For example, the medium circulating in the first circulating unit 4 is water, and the medium circulating in the second circulating unit 5 is oil.

[0127] For example, the medium circulating in the first circulating unit 4 is water.

[0128] For example, the medium circulating in the second circulating unit 5 is oil.

[0129] In this embodiment, the charging connector 3 is located in the second circulation unit 5. The charging connector 3 is connected to the electrical device outside the cabinet. The charging connector 3 is relatively prone to damage. Oil has insulating properties; using oil to regulate the temperature of the charging connector 3 reduces the risk of leakage even if the charging connector 3 is damaged and the temperature-regulating medium leaks out, thus improving the safety of the charging connector 3. The battery pack 2, energy storage converter 11, and charging converter 1 are all located in the first circulation unit 4. The battery pack 2 is installed in the cabinet and is not easily damaged. Water is used to regulate the temperature of the battery pack 2, energy storage converter 11, and charging converter 1. Water has a high thermal conductivity and fast heat transfer speed, thus accelerating the temperature regulation efficiency of the battery pack 2, energy storage converter 11, and charging converter 1.

[0130] It is understood that the temperature regulating medium in the second circulating unit 5 is not limited to oil, and the temperature regulating medium in the first circulating unit 4 is not limited to water. For example, the temperature regulating medium in the second circulating unit 5 is air, and the temperature regulating medium in the first circulating unit 4 is air.

[0131] In one embodiment, both the charging converter 1 and the energy storage converter 11 are housed within a cabinet.

[0132] In this embodiment of the disclosure, the charging converter 1 and the energy storage converter 11 are installed in a reasonable way by making good use of the space inside the cabinet, so that the charging converter 1 and the energy storage converter 11 will not be exposed and occupy external space.

[0133] It is understood that the charging converter 1 and the energy storage converter 11 are not limited to being installed inside the cabinet. Exemplarily, both the charging converter 1 and the energy storage converter 11 are installed outside the cabinet.

[0134] In one embodiment, the heat dissipation device 8 is disposed above the battery pack 2.

[0135] In this embodiment of the present disclosure, hot air typically rises, and the heat dissipation device 8 is disposed above the battery pack 2 to reduce the impact of the heat dissipation device 8 on the battery pack 2.

[0136] In one embodiment, the second circulation unit 5 includes a second flow channel system and a second circulation pump 51, with the temperature regulating flow channel of the charging connector 3 and the second circulation pump 51 disposed in the first flow channel system.

[0137] In this embodiment of the disclosure, the temperature-regulating medium in the second flow channel system absorbs the heat generated by the charging connector 3, and the second circulation pump 51 circulates the temperature-regulating medium in the second flow channel system within the flow channel. The heat in the second flow channel system is transferred to the first flow channel system via the first heat exchanger 6.

[0138] In one embodiment, the second circulation pump 51 is an oil pump.

[0139] In one embodiment, the energy storage device further includes an oil reservoir 52 and an expansion tank 44, with the oil reservoir 52 connected to the second circulation unit 5 and the expansion tank 44 connected to the first circulation unit 4.

[0140] In one embodiment, referring to Figure 1, the battery pack 2 is installed inside a cabinet. A charging converter 1 is electrically connected to the battery pack 2 and converts the electrical energy input or output of the battery pack 2. A charging connector 3 is electrically connected to the charging converter 1 to transmit the electrical energy converted by the charging converter 1. The temperature regulating channels of both the battery pack 2 and the charging converter 1 are located in the first circulating unit 4. The second circulating unit 5 is isolated from the first circulating unit 4. The temperature regulating channel of the charging connector 3 is located in the second circulating unit 5. A first heat exchanger 6 is at least spanned across the first circulating unit 4 and the second circulating unit 5. A heat dissipation device 8 is located between the first circulating unit 4, the second circulating unit 5, and the first heat exchanger 6. One of the heat dissipation devices 8 is installed in the first circulating unit 4. The heat dissipation device 8 is a cooler. The first circulating unit 4 includes a first flow channel system, a first circulating pump 41, and a second heat exchanger 7. The temperature regulating flow channel of the battery pack 2, the temperature regulating flow channel of the charging converter 1, and the first circulating pump 41 are installed in the first flow channel system. The second heat exchanger 7 is connected across the first flow channel system and the cooler. The energy storage converter 11 is electrically connected to the battery pack 2 and the energy storage interface 9 to convert the electrical energy input to or output from the battery pack 2. The first flow channel system includes a main flow channel 42 and an auxiliary flow channel 43. The corresponding heat exchange flow channel of the second heat exchanger 7, the corresponding heat exchange flow channel of the first heat exchanger 6, and the first circulating pump 41 are connected in series in the main flow channel. 42. The auxiliary flow channel 43 is connected end-to-end to the main flow channel 42. The input end of the auxiliary flow channel 43 is connected to the output end of the corresponding heat exchange flow channel of the first heat exchanger 6, and the output end of the auxiliary flow channel 43 is connected to the input end of the corresponding heat exchange flow channel of the second heat exchanger 7. The output end of the corresponding heat exchange flow channel of the second heat exchanger 7 is connected to the input end of the corresponding heat exchange flow channel of the first heat exchanger 6. The temperature regulating flow channels of the battery pack 2, the energy storage converter 11, and the charging converter 1 are all located on the auxiliary flow channel 43. There is one auxiliary flow channel 43. The temperature regulating flow channels of the battery pack 2, the energy storage converter 11, and the charging converter 1 are all connected in series to the auxiliary flow channel 43. Unit 11 is an AC / DC bidirectional converter, and charging converter 1 is a DC converter. Evaporator 85 is located in the second heat exchanger 7. The input end of compressor 82 is connected to the output end of evaporator 85, and the input end of condenser 83 is connected to the output end of compressor 82. Fan 81 is installed in the cabinet and is used to cool condenser 83. The input end of expansion valve 84 is connected to the output end of condenser 83, and the output end of expansion valve 84 is connected to evaporator 85. The circulating medium in the first circulating unit 4 is water, and the circulating medium in the second circulating unit 5 is oil. Cooling device 8 is located above battery pack 2. Charging converter 1 and energy storage converter 11 are both located inside the cabinet.

[0141] The above embodiments are merely illustrative of the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this disclosure, and all should be covered within the scope of this disclosure. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. This disclosure is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of this disclosure.

Claims

1. A power storage device, comprising: a cabinet; a battery pack installed in the cabinet; a charging converter electrically connected to the battery pack, the charging converter being configured to convert electrical energy inputted or outputted by the battery pack; a charging connector electrically connected to the charging converter to transmit the electrical energy converted by the charging converter; a first circulation unit, a temperature regulating flow channel of the battery pack and a temperature regulating flow channel of the charging converter being arranged in the first circulation unit; a second circulation unit, the charging connector being arranged in the second circulation unit, the first circulation unit and the second circulation unit being isolated from each other; a first heat exchanger, the first heat exchanger being arranged across the first circulation unit and the second circulation unit; and a heat dissipation device, the heat dissipation device being arranged in one of the first circulation unit, the second circulation unit and the first heat exchanger. The heat dissipation device is arranged in the first circulation unit. The heat dissipation device is a refrigerator, the first circulation unit comprising: a first flow channel system; a first circulation pump, the temperature regulating flow channel of the battery pack, the temperature regulating flow channel of the charging converter and the first circulation pump being arranged in the first flow channel system; and a second heat exchanger, the second heat exchanger being arranged across the first flow channel system and the refrigerator. The cabinet has a power storage interface, the power storage device further comprising a power storage converter, the power storage converter being electrically connected to the battery pack and the power storage interface respectively to convert electrical energy inputted or outputted by the battery pack, the first flow channel system comprising: a main flow channel, a corresponding heat exchange flow channel of the second heat exchanger, a corresponding heat exchange flow channel of the first heat exchanger and the first circulation pump being connected in series in the main flow channel; and an auxiliary flow channel, the auxiliary flow channel being connected to the main flow channel at both ends, an input end of the auxiliary flow channel being connected to an output end of the corresponding heat exchange flow channel of the first heat exchanger, an output end of the auxiliary flow channel being connected to an input end of the corresponding heat exchange flow channel of the second heat exchanger, an output end of the corresponding heat exchange flow channel of the second heat exchanger being connected to an input end of the corresponding heat exchange flow channel of the first heat exchanger, the temperature regulating flow channel of the battery pack, the temperature regulating flow channel of the power storage converter and the temperature regulating flow channel of the charging converter being arranged in the auxiliary flow channel. The number of the auxiliary flow channels is one, the temperature regulating flow channel of the battery pack, the temperature regulating flow channel of the power storage converter and the temperature regulating flow channel of the charging converter being connected in series in the auxiliary flow channel. The power storage converter is an AC / DC bidirectional converter, the charging converter is a DC converter. The charging converter and the power storage converter are arranged in the cabinet. The refrigerator comprising: an evaporator, the evaporator being arranged in the second heat exchanger; a compressor, an input end of the compressor being connected to an output end of the evaporator; a condenser, an input end of the condenser being connected to an output end of the compressor; a fan, the fan being installed in the cabinet, the fan being configured to cool the condenser; and an expansion valve, an input end of the expansion valve being connected to an output end of the condenser, an output end of the expansion valve being connected to the evaporator. The medium circulating in the first circulation unit is water, the medium circulating in the second circulation unit is oil.

2. The energy storage device of claim 1, wherein, The heat dissipation device is arranged above the battery pack.

3. The energy storage device of claim 2, wherein, ​ ​ ​ ​ 4. The energy storage device of claim 3, wherein, ​ ​ ​ 5. The energy storage device of claim 4, wherein, ​ 6. The energy storage device of claim 4 or 5, wherein, ​ 7. The energy storage device according to any one of claims 4 to 6, wherein ​ 8. The energy storage device according to any one of claims 3 to 7, wherein ​ ​ ​ ​ ​ ​ 9. The energy storage device according to any one of claims 1 to 8, wherein ​ 10. The energy storage device according to any one of claims 1 to 9, wherein ​

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