Energy storage device and charging system

Abstract

The utility model relates to the technical field of energy storage devices, and provides an energy storage device and a charging system. The energy storage device comprises a cabinet body; the plurality of battery devices are arranged in the cabinet body, each battery device comprises a plurality of battery monomers and a heat management component for heat exchange with the plurality of battery monomers, a heat exchange flow channel is arranged in each heat management component, and each heat exchange flow channel is provided with an inlet and an outlet; the heat management system comprises a refrigerating unit, a four-way reversing valve and a piping assembly, the four-way reversing valve is provided with a first connector, a second connector, a third connector and a fourth connector, a liquid outlet of the refrigerating unit is communicated with the first connector through the piping assembly, and a liquid return opening of the refrigerating unit is communicated with the third connector through the piping assembly. The second connector communicates with the inlet through the piping assembly, the fourth connector communicates with the outlet, and the four-way reversing valve is configured to be capable of adjusting the flow direction of the heat exchange medium in the heat exchange runner. According to the technical scheme, the temperature consistency of the battery device can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage devices, and in particular to an energy storage device and a charging system. Background Art

[0002] At present, with the rapid development of battery energy storage, various types of energy storage devices, such as energy storage cabinets and energy storage containers, are widely used in industrial sites, power grids, new energy power generation and other fields.

[0003] In related technologies, energy storage devices are typically equipped with heat exchange plates for heat exchange with the battery cells within the battery device to regulate the temperature of the battery cells. However, due to structural space and process limitations, the heat exchange medium within the heat exchange plates typically uses a one-way flow, resulting in poor temperature consistency among battery cells in different areas, thus affecting the battery cell lifespan. Utility Model Content

[0004] The purpose of this application is to provide an energy storage device and charging system that allows the flow direction of the heat exchange medium within the heat exchange plate to be adjusted, thereby improving the temperature consistency of battery cells in different areas within the battery device and increasing the service life of the battery cells. This purpose is achieved through the following technical solutions:

[0005] In the first aspect, the present application provides an energy storage device, comprising: a cabinet; at least one row of battery devices, arranged in the cabinet, the battery device comprising a thermal management component and a plurality of battery cells, the thermal management component being used to perform heat exchange on the plurality of battery cells, a heat exchange channel being provided in the thermal management component, the heat exchange channel being used to circulate a heat exchange medium, the heat exchange channel having an inlet and an outlet; a thermal management system, the thermal management system comprising a refrigeration unit, a four-way reversing valve and a piping assembly, the four-way reversing valve having a first interface, a second interface, a third interface and a fourth interface, the liquid outlet of the refrigeration unit being connected to the first interface through the piping assembly, the liquid return port of the refrigeration unit being connected to the third interface through the piping assembly, the second interface being connected to the inlet through the piping assembly, the fourth interface being connected to the outlet, the four-way reversing valve being configured to be able to connect the first interface and the second interface, and connect the fourth interface and the third interface, or connect the first interface and the fourth interface, and connect the second interface and the third interface.

[0006] By connecting and setting a four-way reversing valve in the piping assembly between the refrigeration unit and the thermal management component, the four-way reversing valve can control the heat exchange medium to enter the thermal management component along a first flow direction, and can also control the heat exchange medium to enter the thermal management component along the first flow direction. The first flow direction is opposite to the second flow direction, thereby adjusting the flow direction of the heat exchange medium in the thermal management component.

[0007] In the initial stage of heat exchange, a heat exchange medium (such as air, water, coolant, etc.) enters the first interface of the four-way reversing valve from the liquid outlet of the refrigeration unit, and enters the inlet of the heat exchange channel when the first interface and the second interface are connected. After completing heat exchange with the battery cell, the heat exchange medium flows out of the outlet of the heat exchange channel to the fourth interface of the four-way reversing valve, and then flows back to the refrigeration unit through the third interface of the four-way reversing valve and the piping assembly. In this stage, due to the lower temperature of the heat exchange medium near the inlet of the heat exchange channel, the heat exchange effect with the battery cell arranged near the inlet area of the heat exchange channel is better. However, as the heat exchange medium flows along the heat exchange channel toward the outlet, the temperature of the heat exchange medium gradually decreases, resulting in a decrease in the heat exchange effect with the battery cell arranged near the outlet area of the heat exchange channel, thereby causing the temperature of the battery cell arranged near the outlet area of the heat exchange channel to gradually increase. At this time, by controlling the four-way reversing valve to execute the action, the first interface of the four-way reversing valve is connected to the fourth interface, and the second interface is connected to the third interface. In this way, the heat exchange medium can enter from the outlet of the heat exchange channel and flow toward the inlet of the thermal management component to change the flow direction of the heat exchange medium in the heat exchange channel, so that the temperature of the battery cell near the outlet position of the heat exchange channel is reduced. This cycle helps to improve the temperature consistency of the battery cells in different areas of the thermal management component, and thus helps to improve the performance and usability of the battery cells.

[0008] In addition, the heat pipe assembly provided by this application may also have the following additional technical features:

[0009] In some embodiments of the present application, the piping assembly includes: a first pipeline assembly, including a first liquid inlet pipe and a first liquid return pipe, the first liquid inlet pipe is connected to the liquid outlet and the first interface, and the first liquid return pipe is connected to the liquid return port and the third interface; a second pipeline assembly, including a second liquid inlet pipe and a second liquid return pipe, the second liquid inlet pipe is connected to the second interface and the inlet, and the second liquid return pipe is connected to the fourth interface and the outlet.

[0010] In the above technical solution, when the four-way reversing valve is connected to the first and second interfaces, the third and fourth interfaces are also connected accordingly. At this time, the heat exchange medium in the first liquid inlet pipe can enter the second liquid inlet pipe from the first and second interfaces, then enter the inlet of the heat exchange channel through the second liquid inlet pipe, and flow back from the outlet along the heat exchange channel to the second liquid outlet pipe, and then flow out from the first liquid outlet pipe after passing through the fourth and third interfaces and return to the refrigeration unit. When the four-way reversing valve is connected to the first and fourth interfaces, the second and third interfaces are also connected accordingly. At this time, the heat exchange medium in the first liquid inlet pipe can enter the second liquid outlet pipe from the first and fourth interfaces, then enter the outlet of the heat exchange channel through the second liquid outlet pipe, and flow back from the inlet along the heat exchange channel to the second liquid inlet pipe, and then flow out from the first liquid outlet pipe after passing through the second and third interfaces and return to the refrigeration unit, thereby adjusting the flow direction of the heat exchange medium in the heat exchange channel.

[0011] In some embodiments of the present application, multiple thermal management components are arranged at intervals along the height direction of the energy storage device; the piping assembly also includes multiple third pipeline assemblies, each of the third pipeline assemblies includes a third liquid inlet pipe and a third liquid return pipe, and the multiple third liquid inlet pipes are arranged in parallel with the second liquid inlet pipe, one end of each of the third liquid inlet pipe is connected to the second liquid inlet pipe, and the other end is connected to the inlet of one of the thermal management components, and the multiple third liquid return pipes are arranged in parallel with the second liquid return pipe, one end of each of the third liquid return pipe is connected to the second liquid return pipe, and the other end is connected to the outlet of one of the thermal management components.

[0012] In the above technical solution, multiple third liquid inlet pipes of multiple third pipeline assemblies are connected to the second liquid inlet pipe in parallel, and the inlet of each thermal management component is connected to the second liquid inlet pipe through a third liquid inlet pipe. The diameter of the third liquid inlet pipe can be adjusted according to the inlet size without changing the diameter of the second liquid inlet pipe, and the third liquid inlet pipe can be arranged according to actual needs, which is convenient for connection and helps to reduce occupied space.

[0013] Similarly, multiple third liquid inlet pipes of multiple third pipeline assemblies are connected in parallel to the second liquid return pipe, and the outlet of each thermal management component is connected to the second liquid outlet pipe through a third liquid outlet pipe. The diameter of the third liquid outlet pipe can be adjusted according to the outlet size without changing the diameter of the second liquid outlet pipe, and the third liquid outlet pipe can be arranged according to actual needs, which is convenient for connection and helps to reduce occupied space.

[0014] In some embodiments of the present application, each of the third pipeline assemblies is provided with the four-way reversing valve.

[0015] In the above technical solution, the heat exchange medium in each thermal management component can be controlled to change its flow direction through a four-way reversing valve provided in the third pipeline assembly, so that the temperature consistency of multiple battery cells in each battery device can be adjusted more conveniently.

[0016] In some embodiments of the present application, the number of the battery devices is multiple columns, and each column of the battery devices includes multiple battery devices; the number of the first pipeline assemblies and the second pipeline assemblies are both multiple, the first liquid inlet pipes of the multiple first pipeline assemblies are all connected to the liquid outlet, the first liquid return pipes of the multiple first pipeline assemblies are all connected to the liquid return port, and the multiple second pipeline assemblies are respectively connected in series with the multiple first pipeline assemblies.

[0017] In the above technical solution, the number of battery devices is multiple columns. By setting up multiple first pipeline assemblies and multiple second pipeline assemblies, the first liquid inlet pipes of the multiple first pipeline assemblies are all connected to the liquid outlet of the refrigeration unit, the first liquid return pipes of the multiple first pipeline assemblies are all connected to the liquid return port of the refrigeration unit, and the multiple second pipeline assemblies are respectively connected in series with the multiple first pipeline assemblies, so that each column of battery devices can be temperature-regulated by a group of first pipeline assemblies and second pipeline assemblies connected in series, which helps to improve the efficiency of temperature consistency regulation of each column of battery devices.

[0018] In some embodiments of the present application, the number of the battery devices is multiple columns, and the number of the battery devices arranged in each column is multiple; the number of the second pipeline assemblies is multiple, and the multiple second liquid inlet pipes are arranged in parallel with the first liquid inlet pipe, and each second liquid inlet pipe is connected to the inlet of the multiple thermal management components of each column of the battery devices; the multiple third liquid return pipes are arranged in parallel with the second liquid return pipe, and each third liquid return pipe is connected to the outlet of the multiple thermal management components of each column of the battery devices; wherein, each second pipeline assembly is provided with the four-way reversing valve.

[0019] In the above technical solution, the battery devices are arranged in multiple columns, and the thermal management components are also arranged in multiple columns. The multiple thermal management components arranged in the multiple columns are respectively connected to the multiple second pipeline assemblies, and the multiple second pipeline assemblies are connected to the first pipeline assembly in parallel. By arranging a four-way reversing valve in each second pipeline assembly, it is convenient to adjust the temperature consistency of the battery cells in each column of battery devices, and it helps to improve the heat exchange efficiency of the battery cells in each column of battery devices.

[0020] In some embodiments of the present application, the piping assembly includes a first pipeline assembly, a second pipeline assembly and multiple third pipeline assemblies, the first pipeline assembly includes a first liquid inlet pipe and a first liquid return pipe, each second pipeline assembly includes a second liquid inlet pipe and a second liquid return pipe, the third pipeline assembly includes a third liquid inlet pipe and a third liquid return pipe, multiple third liquid inlet pipes are arranged in parallel with the second liquid inlet pipe, and multiple third liquid return pipes are arranged in parallel with the second liquid return pipe, the liquid outlet is connected to the inlet of a thermal management component in sequence through the first liquid inlet pipe, the second liquid inlet pipe and one of the third liquid inlet pipes, and the outlet of each thermal management component is connected to the liquid return port in sequence through one of the third liquid return pipes, the second liquid return pipe and the first return pipe; wherein, the second pipeline assembly or the third pipeline assembly is provided with the four-way reversing valve.

[0021] In the above technical solution, a four-way reversing valve is provided in the second piping assembly to facilitate simultaneous temperature consistency adjustment of multiple battery cells within a battery device row. By providing a four-way reversing valve in the third piping assembly, the heat exchange medium within each thermal management component can be controlled to change its flow direction through a four-way reversing valve provided in the third piping assembly. This allows for more convenient adjustment of the temperature consistency of multiple battery cells within each battery device, helping to improve the efficiency of temperature regulation of multiple battery cells within a battery device.

[0022] In some embodiments of the present application, the cabinet is defined by an equipment compartment and a battery compartment, the refrigeration unit is disposed in the equipment compartment, and the battery device is disposed in the battery compartment.

[0023] In the above technical solution, the refrigeration unit and the battery device are placed in the equipment compartment and the battery compartment respectively, which helps to reduce the interference of the refrigeration unit and other equipment in the equipment compartment on the removal and placement of the battery device, and helps to improve the space utilization of the battery compartment, thereby increasing the energy density of the energy storage device.

[0024] In some embodiments of the present application, the cabinet body includes a top wall and a bottom wall, and a column is provided in the cabinet body, and the two ends of the column are respectively connected to the top wall and the bottom wall; wherein, the thermal management component also includes a locking panel, the four-way reversing valve is provided on the locking panel, and the locking panel is fixedly connected to the top wall or the column.

[0025] In the above technical solution, by installing the four-way reversing valve on the locking panel and fixing the locking panel to the top wall or column of the cabinet, the position of the four-way reversing valve can be fixed to improve the stability and reliability of the installation of the four-way reversing valve, thereby helping to improve the stability of the operation of the four-way reversing valve.

[0026] In some embodiments of the present application, the four-way reversing valve is a ball valve.

[0027] In the above technical solution, the four-way reversing valve is set as a ball valve, which facilitates flow adjustment. Compared with the solenoid valve, the ball valve has a lower cost, more stable control performance and a longer service life.

[0028] In some embodiments of the present application, an installation cavity is provided on the side of the locking panel facing the four-way reversing valve, and the four-way reversing valve includes a valve body and a driving member connected to the valve body. The driving member is provided in the installation cavity, and the driving member is connected to the valve body for driving the valve body to rotate.

[0029] In the above technical solution, by installing the driving member in the installation cavity of the locking panel, the driving member can be protected. The driving member is connected to the valve body of the four-way reversing valve and can drive the valve body to rotate, thereby changing the flow direction of the heat exchange medium.

[0030] In some embodiments of the present application, the locking panel is further provided with a wiring terminal, which is electrically connected to the driving member and is used to be electrically connected to the controller.

[0031] In the above technical solution, the locking panel is provided with a terminal electrically connected to the driving member of the four-way reversing valve, which facilitates the electrical connection of the terminal with the controller, thereby enabling the four-way reversing valve to be controlled by the controller to adjust the flow direction of the heat exchange medium.

[0032] In some embodiments of the present application, the inlet and the outlet are located on the same side of the thermal management component.

[0033] In the above technical solution, by arranging the inlet and the outlet on the same side of the thermal management component, the arrangement of the pipelines connected thereto is facilitated, thereby saving space.

[0034] In some embodiments of the present application, the battery device further includes a cabinet, in which the plurality of battery cells are accommodated; wherein the thermal management component is configured as a bottom plate of the cabinet.

[0035] In the above technical solution, by setting the thermal management component at the bottom of the cabinet and serving as the bottom plate of the cabinet, multiple battery cells are arranged on the bottom plate. On the one hand, the bottom plate can play a role in safety protection of the battery cells, and on the other hand, it can facilitate thermal connection with multiple battery cells to facilitate heat exchange of multiple battery cells.

[0036] In some embodiments of the present application, the energy storage device further includes: a plurality of temperature sensors, which are provided on the plurality of battery cells and are used to detect the temperatures of the plurality of battery cells; and a controller, which is electrically connected to the drive element of the four-way reversing valve and the plurality of temperature sensors.

[0037] In the above technical solution, multiple temperature sensors can detect the temperatures of multiple battery cells in real time and can transmit them to the controller. The controller can control the four-way reversing valve to perform an action to adjust the flow direction of the heat exchange medium when the temperature difference between the highest temperature and the lowest temperature among the multiple battery cells reaches a preset temperature threshold, for example, when the temperature difference between the highest temperature and the lowest temperature reaches 3° or 5°, thereby improving the temperature consistency of multiple battery cells on the heat pipe component.

[0038] In a second aspect, the present application provides a charging system comprising an energy storage device as described in any one of the embodiments of the first aspect, wherein the energy storage device is used to charge an electrical device.

[0039] According to the charging system provided in the present application, since it includes the energy storage device described in any one of the embodiments of the first aspect, it has the technical effects of any of the above embodiments, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the drawings to denote the same components. In the drawings:

[0041] Figure 1 A schematic diagram of the structure of an energy storage device provided in some embodiments of the present application;

[0042] Figure 2 A schematic diagram of the exploded structure of a battery provided in some embodiments of the present application;

[0043] Figure 3 A schematic diagram of the structure of a battery array connected to a thermal management system according to some embodiments of the present application;

[0044] Figure 4 A schematic diagram of the structure of connecting multiple parallel-arranged battery devices and a thermal management system according to some embodiments of the present application;

[0045] Figure 5 A schematic diagram of the structure of a battery device with multiple columns arranged in series and connected to a thermal management system according to some embodiments of the present application;

[0046] Figure 6A schematic diagram of the assembly structure of thermal management components and a portion of the thermal management system of a battery array provided in some embodiments of the present application;

[0047] Figure 7 for Figure 6 A schematic diagram of the enlarged structure of the middle part A;

[0048] Figure 8 A schematic diagram of the exploded structure of a four-way reversing valve provided in some embodiments of the present application;

[0049] Figure 9 A schematic cross-sectional view of the four-way reversing valve provided in some embodiments of the present application, showing a first port connected to a second port, and a third port connected to a fourth port;

[0050] Figure 10 A schematic cross-sectional view of a four-way reversing valve according to some embodiments of the present application, showing a state in which the first and fourth interfaces are connected, and the third and fourth interfaces are connected;

[0051] Figure 11 A schematic cross-sectional view of another state of the four-way reversing valve provided in some embodiments of the present application, in which the first and fourth interfaces are connected, and the third and fourth interfaces are connected;

[0052] Figure 12 Schematic diagram of the cross-sectional structure of the thermal management component provided in some embodiments of the present application.

[0053] The reference numerals are as follows:

[0054] 1000. Energy storage device;

[0055] 100. Battery device; 200. Cabinet;

[0056] 110, housing; 111, first housing; 112, second housing; 120, battery cell;

[0057] 11. Thermal management component; 111. Heat exchange flow channel; 1111. Inlet; 1112. Outlet; 20. Refrigeration unit; 21. Piping assembly; 22. Four-way reversing valve; 221. First interface; 222. Second interface; 223. Third interface; 224. Fourth interface; 225. Valve body; 2251. First channel; 2252. Second channel; 226. Locking panel; 2261. Installation cavity; 227. Drive element; 228. Terminal block; 229. Housing; 23. First pipeline assembly; 231. First liquid inlet pipe; 232. First liquid return pipe; 241. Second liquid inlet pipe; 242. Second liquid return pipe; 251. Third liquid inlet pipe; 252. Third liquid return pipe. DETAILED DESCRIPTION

[0058] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0059] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0060] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0061] References to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0062] In the description of the embodiments of this application, the term "and / or" is merely a description of the association relationship between associated objects, indicating that three relationships can exist. For example, "first and / or second" can represent: the existence of the first alone, the existence of the first and the second together, or the existence of the second alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0063] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0064] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "liquid level", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0065] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0066] At present, with the rapid development of battery energy storage, various types of energy storage devices, such as energy storage cabinets and energy storage containers, are widely used in industrial sites, power grids, new energy power generation and other fields.

[0067] Typical energy storage devices typically include a battery assembly and a thermal management component for heat exchange with the battery cells within the battery to regulate their temperature. However, due to limitations in structural space and process technology, the heat exchange medium within the thermal management component typically flows in and out in a one-way manner, flowing only from the inlet and out of the thermal management component's outlet. This results in poor temperature consistency among battery cells located in different areas, thus impacting the battery's service life.

[0068] In order to solve the problem that when conventional thermal management components are used to perform heat exchange on battery cells in a battery, the temperature consistency of battery cells in different areas is poor, which affects the service life of the battery cells, the present application designs a thermal management component, including a thermal management component, and a first pipeline component and a second pipeline component respectively connected to the inlet and outlet of the thermal management component, and also includes a four-way reversing valve connected to the first pipeline component and the second pipeline component. The four-way reversing valve can adjust the flow direction of the heat exchange medium in the thermal management component, so that the heat exchange medium can flow both in the direction from the inlet to the outlet and in the direction from the outlet to the inlet, so as to adjust the flow direction of the heat exchange medium in a timely manner as needed, thereby improving the temperature consistency of battery cells in different areas, and further increasing the service life of the battery cells.

[0069] The energy storage devices disclosed in the embodiments of this application can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. The energy storage devices can store electrical energy as needed and output it at the appropriate time. For example, the energy storage devices can store electrical energy during low-consumption periods and provide it to users or electrical equipment during peak periods.

[0070] For the convenience of explanation, the following embodiments are described using an energy storage device according to one embodiment of the present application as an example. Figure 1 , Figure 1 This is a schematic diagram of the structure of an energy storage device provided in some embodiments of the present application. An energy storage device 1000 includes a cabinet 200 and one or more battery clusters housed within the cabinet 200. The battery clusters may include multiple battery devices 100, which are connected in series via a busbar to increase the voltage of the energy storage device 1000. When the energy storage device 1000 includes multiple battery clusters, the battery clusters are connected in parallel to increase the capacity of the energy storage device 1000.

[0071] The charging system provided in the embodiment of the present application can be any power system that requires the energy storage device 1000.

[0072] In some embodiments, the energy storage device 1000 is an energy storage container or an energy storage cabinet.

[0073] See Figure 2 and Figure 3 , Figure 2 Schematic diagram of the exploded structure of the battery device 100 provided in some embodiments of the present application; Figure 3A structural diagram of a row of battery devices connected to a thermal management system provided for some embodiments of the present application. According to some embodiments of the present application, the present application provides an energy storage device 1000, comprising: a cabinet 200, a thermal management system and at least one row of battery devices 100. Among them, multiple battery devices 100 are arranged in the cabinet 200, and the battery device 100 includes a thermal management component 11 and multiple battery cells 120. The thermal management component 11 is used to perform heat exchange on the multiple battery cells 120. A heat exchange channel 111 is provided in the thermal management component 11. The heat exchange channel 111 is used to circulate heat exchange medium. The heat exchange channel 111 has an inlet 1111 and an outlet 1112; the thermal management system includes a refrigeration unit, a four-way reversing valve 22 and a piping assembly 21. The four-way reversing valve 22 has a first interface 221, a second interface 222, a third interface 223 and a fourth interface 2 24. The liquid outlet of the refrigeration unit 20 is connected to the first interface 221 through the piping assembly 21, the liquid return port of the refrigeration unit 20 is connected to the third interface 223 through the piping assembly 21, the second interface 222 is connected to the inlet 1111 through the piping assembly 21, and the fourth interface 224 is connected to the outlet 1112. The four-way reversing valve 22 is configured to be able to connect the first interface 221 and the second interface 222, and connect the fourth interface 224 and the third interface 223, or connect the first interface 221 and the fourth interface 224, and connect the second interface 222 and the third interface 223.

[0074] The cabinet 200 is a box-type structure or a frame structure having a storage space for the battery device 100 . A bracket for mounting the battery device 100 may be provided in the cabinet 200 .

[0075] The shape of the cabinet 200 can be configured as needed. An opening can be provided on one side of the cabinet 200 in the horizontal direction to facilitate assembly and maintenance of the batteries. The opening can be provided with an openable door or not. The bracket is connected to the cabinet 200 and can be an integral structure with the cabinet 200 or fixedly connected by bolts or the like. There are multiple battery devices 100 in the cabinet 200. Multiple rows of battery devices 100 can be arranged horizontally in the cabinet 200, or a single row of battery devices 100 can be arranged. Each row of battery devices 100 can be stacked from top to bottom on the bracket within the cabinet 200.

[0076] The battery apparatus 100 mentioned in the embodiments of the present application may include one or more battery cell 120 assemblies for providing voltage and capacity. The battery cell 120 assembly may include multiple battery cells 120, which are connected in series, parallel, or hybrid via a busbar.

[0077] In some embodiments, a battery cell assembly 120 is generally formed by arranging a plurality of battery cells 120 .

[0078] As an example, the battery cell 120 assembly may be a battery module, which is formed by arranging and fixing a plurality of battery cells 120 to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells 120 with a cable tie.

[0079] In some embodiments, the battery device 100 may be a battery pack, which includes a housing 110 and one or more battery cell 120 assemblies, wherein the battery cell 120 assemblies are housed in the housing 110 .

[0080] As an example, the battery cell 120 assembly may be housed in the case 110 by fixing the battery module in the case 110 .

[0081] As an example, the battery cell 120 assembly may also be housed in the case 110 by directly fixing the plurality of battery cells 120 to the case 110 .

[0082] See also Figure 2 As an example, the housing 110 may include a first housing 111 and a second housing 112. The first housing 111 and the second housing 112 engage to form an enclosed space within the housing 110 for accommodating the battery cells 120. Enclosed here means covered or closed, and can be either sealed or unsealed. The first housing 111 may be a top cover or a bottom plate.

[0083] As an example, the box body 110 may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that a closed space is formed inside the box body 110 to accommodate the battery cell 120 assembly.

[0084] The thermal management system is used to circulate a heat exchange medium within the thermal management component 11 to cyclically exchange heat between the battery cells 120 within the multiple battery devices 100. The cabinet 200 may include a battery compartment and an equipment compartment, and the refrigeration unit 20 of the thermal management component 11 may be located in either the battery compartment or the equipment compartment.

[0085] It can be understood that the first interface 221, the second interface 222, the third interface 223 and the fourth interface 224 are arranged in sequence along the circumference of the four-way reversing valve 22. The four-way reversing valve 22 can control the heat exchange medium to enter the thermal management component 11 along the first flow direction, and can also control the heat exchange medium to enter the thermal management component 11 along the first flow direction. The first flow direction is opposite to the second flow direction, thereby realizing the adjustment of the flow direction of the heat exchange medium in the thermal management component 11.

[0086] Specifically, in the initial stage of heat exchange, the heat exchange medium (such as air, water, coolant, etc.) enters the first interface 221 of the four-way reversing valve 22 from the liquid outlet of the refrigeration unit 20, and enters the inlet 1111 of the heat exchange channel 111 when the first interface 221 and the second interface 222 are connected. After completing the heat exchange with the battery cell 120, the heat exchange medium flows out from the outlet 1112 of the heat exchange channel 111 to the fourth interface 224 of the four-way reversing valve 22, and then flows back to the refrigeration unit 20 from the third interface 223 of the four-way reversing valve 22 and the piping assembly 21. In this stage, since the temperature of the heat exchange medium near the inlet 1111 of the heat exchange channel 111 is relatively low, the heat exchange effect with the battery cell 120 arranged in the area near the inlet 1111 of the heat exchange channel 111 is better. However, in the process of the heat exchange medium flowing along the heat exchange channel 111 toward the outlet 1112, the temperature of the heat exchange medium gradually decreases, resulting in a decrease in the heat exchange effect with the battery cell 120 arranged in the area near the outlet 1112 of the heat exchange channel 111, thereby causing the temperature of the battery cell 120 arranged in the area near the outlet 1112 of the heat exchange channel 111 to gradually increase. At this time, by controlling the four-way reversing valve 22 to execute the action, the first interface 221 of the four-way reversing valve 22 is connected to the fourth interface 224, and the second interface 222 is connected to the third interface 223. In this way, the heat exchange medium can enter from the outlet 1112 of the heat exchange channel 111 and flow toward the inlet 1111 of the thermal management component 11 to change the flow direction of the heat exchange medium in the heat exchange channel 111, so that the temperature of the battery cell 120 near the outlet 1112 of the heat exchange channel 111 is reduced. This cycle helps to improve the temperature consistency of the battery cells 120 in different areas of the thermal management component 11, and thus helps to improve the performance and usability of the battery cells 120.

[0087] See also Figure 3 、 Figure 4 、 Figure 6 and Figure 7 , Figure 4 A schematic diagram of the structure of connecting multiple parallel-arranged battery devices and a thermal management system according to some embodiments of the present application; Figure 6 A schematic diagram of the assembly structure of thermal management components and a portion of the thermal management system of a battery array provided in some embodiments of the present application; Figure 7 for Figure 6Enlarged structural diagram of portion A in the middle. According to some embodiments of the present application, the piping assembly 21 includes a first piping assembly 23 and a second piping assembly. The first piping assembly 23 includes a first liquid inlet pipe 231 and a first liquid return pipe 232. The first liquid inlet pipe 231 is connected to the liquid outlet and the first interface 221, and the first liquid return pipe 232 is connected to the liquid return port and the third interface 223. The second piping assembly includes a second liquid inlet pipe 241 and a second liquid return pipe 242. The second liquid inlet pipe 241 is connected to the second interface 222 and the inlet 1111, and the second liquid return pipe 242 is connected to the fourth interface 224 and the outlet 1112.

[0088] Exemplarily, the first pipeline assembly 23 is arranged in a horizontal direction, and the second pipeline assembly is extended along the height direction of the cabinet 200 .

[0089] When the four-way reversing valve 22 is connected to the first interface 221 and the second interface 222, the third interface 223 and the fourth interface 224 are also connected accordingly. At this time, the heat exchange medium in the first liquid inlet pipe 231 can enter the second liquid inlet pipe 241 from the first interface 221 and the second interface 222, and then enter the inlet 1111 of the heat exchange channel 111 through the second liquid inlet pipe 241, and flow back from the outlet 1112 along the heat exchange channel 111 to the second liquid outlet pipe, and then flow out from the first liquid outlet pipe through the fourth interface 224 and the third interface 223 and flow back to the refrigeration unit 20. When the four-way reversing valve 22 is connected to the first interface 221 and the fourth interface 224, the second interface 222 and the third interface 223 are also connected accordingly. At this time, the heat exchange medium in the first liquid inlet pipe 231 can enter the second liquid outlet pipe from the first interface 221 and the fourth interface 224, and then enter the outlet 1112 of the heat exchange channel 111 through the second liquid outlet pipe, and flow back from the inlet 1111 to the second liquid inlet pipe 241 along the heat exchange channel 111, and then flow out of the first liquid outlet pipe and flow back to the refrigeration unit 20 after passing through the second interface 222 and the third interface 223, thereby adjusting the flow direction of the heat exchange medium in the heat exchange channel 111.

[0090] See also Figure 3 and Figure 4 According to some embodiments of the present application, multiple thermal management components 11 are arranged at intervals along the height direction of the energy storage device 1000; the piping assembly 21 also includes multiple third pipeline assemblies, each third pipeline assembly includes a third liquid inlet pipe 251 and a third liquid return pipe 252, and the multiple third liquid inlet pipes 251 are arranged in parallel to the second liquid inlet pipe 241, one end of each third liquid inlet pipe 251 is connected to the second liquid inlet pipe 241, and the other end is connected to the inlet 1111 of a thermal management component 11, and the multiple third liquid return pipes 252 are arranged in parallel to the second liquid return pipe 242, one end of each third liquid return pipe 252 is connected to the second liquid return pipe 242, and the other end is connected to the outlet 1112 of a thermal management component 11.

[0091] Multiple third liquid inlet pipes 251 of multiple third pipeline assemblies are connected in parallel to the second liquid inlet pipe 241. The inlet 1111 of each thermal management component 11 is connected to the second liquid inlet pipe 241 through a third liquid inlet pipe 251. The diameter of the third liquid inlet pipe 251 can be adjusted according to the size of the inlet 1111 without changing the diameter of the second liquid inlet pipe 241. The third liquid inlet pipe 251 can be arranged according to actual needs, which is convenient for connection and helps to reduce occupied space.

[0092] Similarly, multiple third liquid inlet pipes 251 of multiple third pipeline assemblies are connected in parallel to the second liquid return pipe 242, and the outlet 1112 of each thermal management component 11 is connected to the second liquid outlet pipe through a third liquid outlet pipe. The diameter of the third liquid outlet pipe can be adjusted according to the size of the outlet 1112 without changing the diameter of the second liquid outlet pipe, and the third liquid outlet pipe can be arranged according to actual needs, which is convenient for connection and helps to reduce occupied space.

[0093] According to some embodiments of the present application, each third pipeline assembly is provided with a four-way reversing valve 22 .

[0094] Specifically, when the four-way reversing valve 22 is arranged in the third pipeline assembly, part of the pipeline of the third liquid inlet pipe 251 is connected between the second interface 222 and the inlet 1111 of the thermal management component 11, and part of the pipeline of the third liquid inlet pipe 251 is connected between the first interface 221 and the second liquid inlet pipe 241, part of the pipeline of the third return pipe 252 is connected between the fourth interface 224 and the outlet 1112 of the thermal management component 11, and part of the pipeline of the third liquid inlet pipe 251 is connected between the third interface 223 and the second return pipe 242.

[0095] That is, the heat exchange medium in each thermal management component 11 can be controlled to change its flow direction through a four-way reversing valve 22 provided in the third pipeline assembly, so that the temperature consistency of the multiple battery cells 120 in each battery device 100 can be adjusted more conveniently.

[0096] According to some embodiments of the present application, the number of battery devices 100 is multiple columns, and each column of battery devices 100 includes multiple battery devices; the number of first pipeline assemblies 23 and second pipeline assemblies 24 are both multiple, and the first liquid inlet pipes 231 of the multiple first pipeline assemblies 23 are all connected to the liquid outlet, the first liquid return pipes 232 of the multiple first pipeline assemblies 23 are all connected to the liquid return port, and the multiple second pipeline assemblies 24 are respectively connected in series with the multiple first pipeline assemblies 23.

[0097] In the above technical solution, the number of battery devices is multiple columns. By providing multiple first pipeline assemblies 23 and multiple second pipeline assemblies 24, the first liquid inlet pipes 231 of the multiple first pipeline assemblies 23 are all connected to the liquid outlet of the refrigeration unit 20, the first liquid return pipes 232 of the multiple first pipeline assemblies 23 are all connected to the liquid return port of the refrigeration unit 20, and the multiple second pipeline assemblies 24 are respectively connected in series with the multiple first pipeline assemblies 23, so that each column of battery devices 100 can be temperature-regulated by a group of first pipeline assemblies 23 and second pipeline assemblies 24 connected in series, which helps to improve the efficiency of temperature consistency regulation of each column of battery devices 100.

[0098] See also Figure 4 According to some embodiments of the present application, the number of battery devices 100 is multiple rows, and the number of battery devices 100 arranged in each row is multiple; the number of second pipeline assemblies is multiple, and multiple second liquid inlet pipes 241 are arranged in parallel with the first liquid inlet pipe 231, and each second liquid inlet pipe 241 is connected to the inlet 1111 of multiple thermal management components 11 of each row of battery devices 100; multiple third liquid return pipes 252 are arranged in parallel with the second liquid return pipe 242, and each third liquid return pipe 252 is connected to the outlet 1112 of multiple thermal management components 11 of each row of battery devices 100; wherein, each second pipeline assembly is provided with a four-way reversing valve 22.

[0099] Specifically, when the four-way reversing valve 22 is arranged in the second pipeline assembly, the third liquid inlet pipe 251 is connected to the inlet 1111 of the thermal management component 11, the third liquid return pipe 252 is connected to the outlet 1112 of the thermal management component 11, part of the pipeline of the second liquid inlet pipe 241 is connected between the second interface 222 and the third liquid inlet pipe 251, and part of the pipeline of the second liquid inlet pipe 241 is connected between the first interface 221 and the first liquid inlet pipe 231, part of the pipeline of the second liquid return pipe 242 is connected between the fourth interface 224 and the third liquid inlet pipe 251, and part of the pipeline of the third liquid inlet pipe 251 is connected between the third interface 223 and the first return pipe 232.

[0100] When the battery devices 100 are arranged in multiple columns, the thermal management components 11 are also arranged in multiple columns. The multiple thermal management components 11 arranged in multiple columns are respectively connected to the multiple second pipeline assemblies, and the multiple second pipeline assemblies are connected to the first pipeline assembly 23 in parallel. By arranging a four-way reversing valve 22 in each second pipeline assembly, it is convenient to adjust the temperature consistency of the battery cells 120 in each column of battery devices 100, and it helps to improve the heat exchange efficiency of the battery cells 120 in each column of battery devices 100.

[0101] See also Figure 4 and Figure 5 , Figure 5Schematic diagram of the connection between multiple battery devices arranged in series and a thermal management system according to some embodiments of the present application. In some embodiments, the thermal management components 11 of each battery device 100 can be connected in series or in parallel via a piping assembly 21.

[0102] Specifically, when the thermal management components 11 of each column of battery devices 100 are connected in series, the second liquid inlet pipe 241 of the second pipeline assembly is connected to the inlet 1111 of a thermal management component 11 at the head end of each column, the adjacent thermal management components 11 are connected in series through the third pipeline assembly, and the outlet 1112 of a thermal management component 11 at the end is connected to the second liquid return pipe 242 of the second pipeline self-inspection.

[0103] According to some embodiments of the present application, the piping assembly 21 includes a first piping assembly 23, a second piping assembly 24, and a plurality of third piping assemblies 25. The first piping assembly 23 includes a first liquid inlet pipe 231 and a first liquid return pipe 232. Each second piping assembly 24 includes a second liquid inlet pipe 241 and a second liquid return pipe 242. The third piping assembly 25 includes a third liquid inlet pipe 251 and a third liquid return pipe 252. The plurality of third liquid inlet pipes 251 are arranged in parallel with the second liquid inlet pipe 241. The plurality of third liquid return pipes 252 are arranged in parallel with the second liquid inlet pipe 241. The return liquid pipes 252 are arranged in parallel with the second return liquid pipe 242, and the liquid outlet is connected to the inlet 1111 of a thermal management component 11 through the first liquid inlet pipe 231, the second liquid inlet pipe 241 and a third liquid inlet pipe 251 in sequence, and the outlet 1112 of each thermal management component 11 is connected to the return liquid port through a third liquid return pipe 252, the second liquid return pipe 242 and the first liquid return pipe 232 in sequence; wherein, the second pipeline assembly 24 or the third pipeline assembly 25 is provided with a four-way reversing valve 22.

[0104] By disposing the four-way reversing valve 22 on the second pipeline assembly 24 , the temperature consistency of multiple battery cells 120 in a certain battery device column can be adjusted simultaneously through the four-way reversing valve 22 on the second pipeline assembly 24 .

[0105] By setting a four-way reversing valve 22 in the third pipeline assembly 25, the heat exchange medium in each thermal management component 11 can be controlled to change its flow direction through a four-way reversing valve 22 set in the third pipeline assembly 25, so that the temperature consistency of multiple battery cells 120 in each battery device can be adjusted more conveniently, which helps to improve the efficiency of temperature regulation of multiple battery cells 120 in a battery device.

[0106] According to some embodiments of the present application, the cabinet 200 is defined as an equipment compartment and a battery compartment, the refrigeration unit 20 is disposed in the equipment compartment, and the battery device 100 is disposed in the battery compartment.

[0107] The refrigeration unit 20 and the battery device 100 are placed in the equipment compartment and the battery compartment respectively, which helps to reduce the interference of the refrigeration unit 20 and other equipment parts in the equipment compartment on the removal and placement of the battery device 100, thereby improving the removal and placement efficiency of the battery device 100, and helps to improve the space utilization of the battery compartment, so as to increase the energy density of the energy storage device 1000.

[0108] According to some embodiments of the present application, the cabinet 200 includes a top wall and a bottom wall, and a column is provided inside the cabinet 200, and the two ends of the column are respectively connected to the top wall and the bottom wall; wherein, the thermal management component also includes a locking panel 226, and the four-way reversing valve 22 is provided on the locking panel 226, and the locking panel 226 is fixedly connected to the top wall or the column.

[0109] Illustratively, one or more mounting holes are provided on the locking panel 226 , and the mounting holes are used for fasteners such as screws to pass through so as to fix the locking panel 226 to the top wall or the column.

[0110] By installing the four-way reversing valve 22 on the locking panel 226 and fixing the locking panel 226 to the top wall or column of the cabinet 200, the position of the four-way reversing valve 22 can be fixed to improve the stability and reliability of the installation of the four-way reversing valve 22, thereby helping to improve the stability of the operation of the four-way reversing valve 22.

[0111] See also Figure 8 , Figure 8 Schematic diagram of the exploded structure of a four-way reversing valve provided in some embodiments of the present application. According to some embodiments of the present application, the four-way reversing valve 22 is a ball valve.

[0112] By setting the four-way reversing valve 22 as a ball valve, the ball valve has a lower cost than the solenoid valve, has a more stable control performance, and has a longer service life.

[0113] See also Figure 8 According to some embodiments of the present application, a mounting cavity 2261 is provided on the side of the locking panel 226 facing the four-way reversing valve 22. The four-way reversing valve 22 includes a valve body 225 and a driving member 227 connected to the valve body 225. The driving member 227 is provided in the mounting cavity 2261, and the driving member 227 is connected to the valve body 225 for driving the valve body 225 to rotate.

[0114] Exemplarily, the four-way reversing valve 22 further includes a housing 229 , the valve body 225 is disposed in the housing 229 , and the housing 229 is covered on the outside of the installation cavity 2261 .

[0115] Exemplarily, the driving member 227 is an electric motor. The driving shaft of the driving member 227 is aligned with the axis of the mounting cavity 2261, so that the driving member 227 can drive the valve body 225 to rotate clockwise or counterclockwise around the axis of the mounting cavity 2261 to control the connection between the first interface 221 and the second interface 222, and the connection between the fourth interface 224 and the third interface 223, or the connection between the first interface 221 and the fourth interface 224, and the connection between the second interface 222 and the third interface 223.

[0116] By installing the driving member 227 in the installation cavity 2261 of the locking panel 226, the driving member 227 can be protected. The driving member 227 is connected to the valve body 225 of the four-way reversing valve 22 and can drive the valve body 225 to rotate, thereby changing the flow direction of the heat exchange medium.

[0117] See also Figures 9 to 11 , Figure 9 A schematic cross-sectional view of the four-way reversing valve provided in some embodiments of the present application, showing a first port connected to a second port, and a third port connected to a fourth port; Figure 10 A schematic cross-sectional view of a four-way reversing valve according to some embodiments of the present application, showing a state in which the first and fourth interfaces are connected, and the third and fourth interfaces are connected; Figure 11 This is a schematic cross-sectional view of another state of a four-way reversing valve provided in some embodiments of the present application, wherein the first and fourth interfaces are connected, and the third and fourth interfaces are connected. In some embodiments, the valve body 225 has a first channel 2251 and a second channel 2252. The first interface 221 and the second interface 222 can be connected through the first channel 2251, and the fourth interface 224 and the third interface 223 can be connected through the second channel 2252. Alternatively, the first interface 221 and the fourth interface 224 can be connected through the first channel 2251, and the second interface 222 and the third interface 223 can be connected through the second channel 2252. During the rotation of the valve body 225, the flow area of the heat exchange medium in the first channel 2251 and the second channel 2252 can be adjusted, thereby adjusting the flow rate and flow volume of the heat exchange medium.

[0118] See also Figure 8 According to some embodiments of the present application, the locking panel 226 is further provided with a wiring terminal 228, which is electrically connected to the driving member 227 and is used to be electrically connected to the controller.

[0119] The locking panel 226 is provided with a connection terminal 228 electrically connected to the driving member 227 of the four-way reversing valve 22, so that the connection terminal 228 is electrically connected to the controller, thereby enabling the four-way reversing valve 22 to be controlled by the controller to adjust the flow direction of the heat exchange medium.

[0120] See also Figure 12, Figure 12 Schematic diagram of the cross-sectional structure of the thermal management component provided in some embodiments of the present application. According to some embodiments of the present application, the inlet 1111 and the outlet 1112 are provided on the same side of the thermal management component 11.

[0121] By arranging the inlet 1111 and the outlet 1112 on the same side of the heat management component 11 , it is convenient to arrange the pipelines connected thereto, thereby saving space.

[0122] According to some embodiments of the present application, the battery device 100 further includes a cabinet 200 , in which the plurality of battery cells 120 are accommodated; wherein the thermal management component 11 is configured as a bottom plate of the cabinet 200 .

[0123] By setting the thermal management component 11 at the bottom of the cabinet 200 and serving as the bottom plate of the cabinet 200, multiple battery cells 120 are arranged on the bottom plate. On the one hand, the bottom plate can play a role in safety protection of the battery cells 120, and on the other hand, it can facilitate thermal connection with the multiple battery cells 120 to facilitate heat exchange of the multiple battery cells 120.

[0124] According to some embodiments of the present application, the energy storage device 1000 further includes: a plurality of temperature sensors, which are provided on the plurality of battery cells 120 and are used to detect the temperatures of the plurality of battery cells 120; and a controller, which is electrically connected to the driving member 227 of the four-way reversing valve 22 and the plurality of temperature sensors.

[0125] Multiple temperature sensors are correspondingly disposed on multiple battery cells 120 to detect the temperatures of the multiple battery cells 120 in real time and transmit the information to the controller. The controller can control the four-way reversing valve 22 to adjust the flow direction of the heat exchange medium when the temperature difference between the highest and lowest temperatures of the multiple battery cells 120 reaches a preset temperature threshold, for example, when the temperature difference between the highest and lowest temperatures reaches 3° or 5°, thereby improving the temperature consistency of the multiple battery cells 120 in the heat pipe component. Alternatively, the controller can control the four-way reversing valve 22 to adjust the flow direction of the heat exchange medium when the heat exchange medium in the thermal management component 11 flows in a single direction for a preset period of time, for example, when the heat exchange medium flows from the inlet 1111 to the outlet 1112 of the heat exchange channel 111 for 30 minutes or 60 minutes.

[0126] According to some embodiments of the present application, see Figure 3 、 Figure 4 、 Figure 6 and Figure 7The present application provides an energy storage device 1000, comprising: a cabinet 200, a thermal management system, and multiple battery arrays 100. The multiple battery arrays 100 are disposed within the cabinet 200. The battery arrays 100 include a thermal management component 11 and multiple battery cells 120. The thermal management component 11 is configured to perform heat exchange on the multiple battery cells 120. A heat exchange channel 111 is provided within the thermal management component 11. The heat exchange channel 111 is configured to circulate a heat exchange medium and has an inlet 1111 and an outlet 1112. The thermal management system includes a refrigeration unit 20, a first pipeline assembly 23, a second pipeline assembly, a third pipeline assembly, and a four-way reversing valve 22. The four-way reversing valve 22 has a first interface 221, a second interface 222, a third interface 223 and a fourth interface 224. The first pipeline assembly 23 includes a first liquid inlet pipe 231 and a first liquid return pipe 232. The first liquid inlet pipe 231 is connected to the liquid outlet and the first interface 221, and the first liquid return pipe 232 is connected to the liquid return port and the third interface 223. The number of the second pipeline assembly and the third pipeline assembly is multiple, and each second pipeline assembly includes a second liquid inlet pipe 241 and a second liquid return pipe 242. The second liquid inlet pipe 241 is connected to the second interface 222 and the inlet 1111, and the second liquid return pipe 242 is connected to the The fourth port 224 is connected to the outlet 1112. Each third pipeline assembly includes a third liquid inlet pipe 251 and a third liquid return pipe 252. Multiple third liquid inlet pipes 251 are arranged in parallel with the second liquid inlet pipe 241. One end of each third liquid inlet pipe 251 is connected to the second liquid inlet pipe 241, and the other end is connected to the inlet 1111 of a thermal management component 11. Multiple third liquid return pipes 252 are arranged in parallel with the second liquid return pipe 242. One end of each third liquid return pipe 252 is connected to the second liquid return pipe 242, and the other end is connected to the outlet 1112 of a thermal management component 11. Through the above technical solution, the flow direction of the heat exchange medium in the thermal management component 11 can be adjusted to improve the temperature consistency of the battery cells 120 in different areas of the thermal management component 11, thereby helping to increase the service life of the battery cells 120.

[0127] The above description is merely a preferred embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. An energy storage device, characterized in that: include: Cabinet; At least one column of battery devices, each column being provided with a plurality of battery devices, each of the battery devices being disposed within the cabinet, the battery devices comprising a thermal management component and a plurality of battery cells, the thermal management component being configured to perform heat exchange on the plurality of battery cells, the thermal management component being provided with a heat exchange flow channel configured to circulate a heat exchange medium, the heat exchange flow channel having an inlet and an outlet; A thermal management system, the thermal management system includes a refrigeration unit, a four-way reversing valve and a piping assembly, the four-way reversing valve has a first interface, a second interface, a third interface and a fourth interface, the liquid outlet of the refrigeration unit is connected to the first interface through the piping assembly, the liquid return port of the refrigeration unit is connected to the third interface through the piping assembly, the second interface is connected to the inlet through the piping assembly, and the fourth interface is connected to the outlet, the four-way reversing valve is configured to be able to connect the first interface and the second interface, and connect the fourth interface and the third interface, or connect the first interface and the fourth interface, and connect the second interface and the third interface.

2. The energy storage device according to claim 1, characterized in that The piping assembly includes: a first pipeline assembly, comprising a first liquid inlet pipe and a first liquid return pipe, wherein the first liquid inlet pipe is connected to the liquid outlet and the first interface, and the first liquid return pipe is connected to the liquid return port and the third interface; The second pipeline assembly includes a second liquid inlet pipe and a second liquid return pipe, the second liquid inlet pipe is connected to the second interface and the inlet, and the second liquid return pipe is connected to the fourth interface and the outlet.

3. The energy storage device according to claim 2, characterized in that A plurality of the thermal management components are spaced apart along the height direction of the energy storage device; The piping assembly also includes multiple third pipe assemblies, each of the third pipe assemblies includes a third liquid inlet pipe and a third liquid return pipe. The multiple third liquid inlet pipes are arranged in parallel with the second liquid inlet pipe, one end of each of the third liquid inlet pipes is connected to the second liquid inlet pipe, and the other end is connected to the inlet of one of the thermal management components. The multiple third liquid return pipes are arranged in parallel with the second liquid return pipe, one end of each of the third liquid return pipes is connected to the second liquid return pipe, and the other end is connected to the outlet of one of the thermal management components.

4. The energy storage device according to claim 3, characterized in that Each of the third pipeline components is provided with the four-way reversing valve.

5. The energy storage device according to any one of claims 2 to 4, characterized in that: The battery devices are arranged in multiple columns, and each column of the battery devices includes multiple battery devices; There are multiple first pipeline assemblies and multiple second pipeline assemblies, the first liquid inlet pipes of multiple first pipeline assemblies are all connected to the liquid outlet, the first liquid return pipes of multiple first pipeline assemblies are all connected to the liquid return port, and the multiple second pipeline assemblies are respectively connected in series with the multiple first pipeline assemblies.

6. The energy storage device according to any one of claims 3 or 4, characterized in that: The number of the battery devices is multiple columns, and the number of the battery devices arranged in each column is multiple; There are multiple second pipe assemblies, multiple second liquid inlet pipes are arranged in parallel with the first liquid inlet pipe, each second liquid inlet pipe is connected to the inlet of multiple thermal management components of each column of the battery devices, and multiple third liquid return pipes are arranged in parallel with the second liquid return pipe, each third liquid return pipe is connected to the outlet of multiple thermal management components of each column of the battery devices; Wherein, each of the second pipeline components is provided with the four-way reversing valve.

7. The energy storage device according to claim 1, characterized in that The piping assembly includes a first piping assembly, a second piping assembly, and a plurality of third piping assemblies, the first piping assembly includes a first liquid inlet pipe and a first liquid return pipe, each second piping assembly includes a second liquid inlet pipe and a second liquid return pipe, the third piping assembly includes a third liquid inlet pipe and a third liquid return pipe, a plurality of the third liquid inlet pipes are arranged in parallel with the second liquid inlet pipe, a plurality of the third liquid return pipes are arranged in parallel with the second liquid return pipe, the liquid outlet is connected to the inlet of a thermal management component in sequence through the first liquid inlet pipe, the second liquid inlet pipe, and one of the third liquid inlet pipes, and the outlet of each thermal management component is connected to the liquid return port in sequence through one of the third liquid return pipes, the second liquid return pipe, and the first liquid return pipe; Wherein, the second pipeline assembly or the third pipeline assembly is provided with the four-way reversing valve.

8. The energy storage device according to any one of claims 1 to 4, characterized in that: The cabinet is defined as an equipment compartment and a battery compartment. The refrigeration unit is arranged in the equipment compartment, and the battery device is arranged in the battery compartment.

9. The energy storage device according to any one of claims 1 to 4, characterized in that: The cabinet body includes a top wall and a bottom wall, and a column is provided in the cabinet body, and two ends of the column are respectively connected to the top wall and the bottom wall; Wherein, the thermal management system further includes a locking panel, the four-way reversing valve is arranged on the locking panel, and the locking panel is fixedly connected to the top wall or the column.

10. The energy storage device according to any one of claims 1 to 4, characterized in that: The four-way reversing valve is a ball valve.

11. The energy storage device according to claim 9, characterized in that An installation cavity is provided on the side of the locking panel facing the four-way reversing valve. The four-way reversing valve includes a valve body and a driving member connected to the valve body. The driving member is provided in the installation cavity and connected to the valve body, and is used to drive the valve body to rotate around the axis direction of the installation cavity.

12. The energy storage device according to claim 11, characterized in that The locking panel is further provided with a wiring terminal, which is electrically connected to the driving member and is used to be electrically connected to the controller.

13. The energy storage device according to any one of claims 1 to 4, characterized in that: The inlet and the outlet are arranged on the same side of the heat management component.

14. The energy storage device according to any one of claims 1 to 4, characterized in that: The battery device further includes a box, wherein the plurality of battery cells are accommodated in the box; Wherein, the thermal management component is configured as the bottom plate of the cabinet.

15. The energy storage device according to any one of claims 1 to 4, characterized in that: The energy storage device further comprises: a plurality of temperature sensors, each of which is provided on each of the battery cells and configured to detect the temperature of the battery cells; A controller is electrically connected to the four-way reversing valve and the plurality of temperature sensors.

16. A charging system, characterized in that: The energy storage device comprises the energy storage device according to any one of claims 1 to 15, wherein the energy storage device is used to charge an electrical device.

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