Battery pack and energy storage system having the same

Abstract

The utility model discloses a kind of battery pack and energy storage system with it, battery pack includes: battery shell, the inside surface of the battery shell is configured with magnetic piece;Battery module, the battery module is installed in the battery shell;Heating film unit, the heating film unit is set to the surface of the battery module, the surface of the heating film unit is connected with the magnetic piece position opposite magnetic phase change material piece;Wherein, the magnetic phase change material piece is spaced from the magnetic piece each other when not generating magnetic force, the magnetic phase change material piece generates magnetic force and is attracted to each other with the magnetic piece when reaching preset temperature, to drive the heating film unit road to separate from the battery module. According to the battery pack of the utility model embodiment, with high safety, lower cost and the like advantages.

Description

Technical Field

[0001] This utility model relates to the field of energy storage technology, and in particular to a battery pack and an energy storage system having the same. Background Technology

[0002] In related technologies, when the battery module of a battery pack is heated by a heating film unit, if there is a safety hazard in the battery module, both the battery module and the heating film unit can be monitored in real time. Software strategies can control the hardware to cut off the power to the heating film unit, or a physical safety switch can be installed on the heating film unit. When the temperature of the heating film unit exceeds a safety threshold, the physical safety switch will open, thus cutting off the power to the heating film unit. However, when data acquisition is abnormal, the software strategy fails, and the heating film unit cannot be shut off. When the physical safety switch malfunctions, the power supply cannot be cut off in a timely and effective manner. The safety of the heating film unit using these two methods is relatively low, and timely power-off of the heating film unit cannot be guaranteed. Furthermore, the installation process is relatively complex and costly. Utility Model Content

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one objective of the present invention is to provide a battery pack that has advantages such as high safety and low cost.

[0004] Another objective of this invention is to provide an energy storage system having the aforementioned battery pack.

[0005] A battery pack according to a first aspect of the present invention includes: a battery housing, wherein a magnetic element is formed on the inner surface of the battery housing; a battery module, wherein the battery module is installed inside the battery housing; and a heating film unit, wherein the heating film unit is disposed on the surface of the battery module, and a magnetic phase change material element is connected to the surface of the heating film unit and is positioned opposite to the magnetic element; wherein the magnetic phase change material element is spaced apart from the magnetic element when no magnetic force is generated, and the magnetic phase change material element generates magnetic force and attracts the magnetic element when a preset temperature is reached, thereby causing the heating film unit to detach from the battery module.

[0006] According to the battery pack of this embodiment, the magnetic phase change material component is isolated from the magnetic component inside the battery casing when it has not reached a preset temperature. When the temperature of the magnetic phase change material component reaches the preset temperature, it changes its magnetic state, generating an attractive force, thereby activating the detachment mechanism. In traditional battery pack structures, the heating film unit may continue to be powered in the event of a malfunction, leading to overheating or even runaway of the battery module. However, this embodiment introduces a magnetic phase change material component and applies the principle of magnetic attraction. Once the preset temperature is reached, the heating film unit automatically detaches from the battery module, thereby cutting off the heating source. This structure significantly reduces safety hazards caused by overheating and improves the safety of the battery module.

[0007] Furthermore, this battery pack achieves functional integration by combining the heating film unit, magnetic components, and magnetic phase change material components, simplifying the number and complexity of parts. This not only effectively saves space but also reduces production and assembly costs, while improving the battery pack's compatibility and modularity.

[0008] Therefore, the battery pack according to the present invention has advantages such as high safety and low cost.

[0009] According to some embodiments of the present invention, the heating film unit includes: a heating film covering the surface of the battery module, the magnetic phase change material being attached to the surface of the heating film; and a power connector electrically connected to the heating film, the power connector being installed in the battery housing and located on one side of the battery module, the power connector being adapted to be electrically connected to a heating power source outside the battery housing.

[0010] According to some embodiments of this utility model, there are multiple magnetic phase change material components and multiple magnetic components arranged on the bottom surface of the heating film and multiple magnetic components arranged on the bottom surface of the battery casing, with each magnetic phase change material component and each magnetic component corresponding to the other.

[0011] According to some embodiments of the present invention, the magnetic phase change material components are arranged in multiple rows and columns along the bottom surface of the battery module, and the magnetic components are arranged in multiple rows and columns along the bottom surface of the battery casing.

[0012] According to some embodiments of the present invention, the battery module includes: multiple battery cells, the multiple battery cells are arranged side by side in multiple columns, multiple magnetic phase change material components are located between two adjacent columns of battery cells, and the magnetic phase change material components in the same row are arranged along the length direction of the same battery cell.

[0013] According to some embodiments of the present invention, each of the magnetic phase change materials coincides with the outer contour of the corresponding magnetic component.

[0014] According to some embodiments of the present invention, the power connector includes: a first plug and a second plug, the first plug being installed on one side of the battery housing in the thickness direction, the second plug being installed on the other side of the battery housing in the thickness direction, both the first plug and the second plug being adapted to be connected to an external power source, and both the first plug and the second plug being electrically connected to the heating film to form a current loop.

[0015] According to some embodiments of the present invention, the battery housing includes: a bottom shell, in which the battery module and the heating film unit are both installed, the magnetic component is disposed on the inner bottom surface of the bottom shell, and the first connector is installed on the bottom surface of the bottom shell; and a top cover, which covers the top surface of the bottom shell, and the second connector is installed on the top cover.

[0016] According to some embodiments of the present invention, the battery pack further includes: a data acquisition board, which is disposed on one side of the battery module and located between the first connector and the second connector, and the data acquisition board is electrically connected to the battery module and the heating film respectively.

[0017] According to some embodiments of the present invention, the end faces of the acquisition board and the battery module are parallel to each other and spaced apart from each other, and a flexible circuit board is connected between the busbar of the battery module and the acquisition board.

[0018] According to some embodiments of the present invention, the battery unit has an end plate bracket on the side facing the acquisition plate, the battery housing has a crossbeam bracket spanning opposite sides of its inner side, the crossbeam bracket is mounted on the end plate bracket, and the acquisition plate is mounted on the crossbeam bracket.

[0019] The energy storage system according to a second aspect of the present invention includes a battery pack according to the first aspect of the present invention described above.

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

[0021] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0022] Figure 1 This is a schematic diagram of the battery pack structure according to an embodiment of the present utility model;

[0023] Figure 2 This is an exploded view of a battery pack according to an embodiment of the present utility model;

[0024] Figure 3 This is a schematic diagram of the battery casing structure of the battery pack according to an embodiment of the present utility model;

[0025] Figure 4 This is a schematic diagram of the internal structure of the battery pack according to an embodiment of the present utility model;

[0026] Figure 5 This is a cross-sectional view of a battery pack according to an embodiment of the present utility model;

[0027] Figure 6 This is a schematic diagram of the heating film unit of the battery pack according to an embodiment of the present invention.

[0028] Figure label:

[0029] Battery pack 1, battery casing 100, battery module 200, heating film unit 300, data acquisition board 400

[0030] Flexible circuit board 500, magnetic component 101, crossbeam bracket 102, bottom shell 110, top cover 120.

[0031] Magnetic phase change material component 301, heating film 310, power connector 320, battery cell 210, end plate bracket 211.

[0032] First connector 321, second connector 322. Detailed Implementation

[0033] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0034] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] In the description of this utility model, "first feature" and "second feature" may include one or more of the features.

[0036] In the description of this utility model, "multiple" means two or more, and "several" means one or more.

[0037] The battery pack 1 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0038] like Figures 1-6 As shown, the battery pack 1 according to the first aspect of the present invention includes a battery housing 100, a battery module 200 and a heating film unit 300.

[0039] A magnetic element 101 is formed on the inner surface of the battery casing 100. The battery module 200 is installed inside the battery casing 100. A heating film unit 300 is disposed on the surface of the battery module 200, and a magnetic phase change material element 301 is connected to the surface of the heating film unit 300, which is positioned opposite to the magnetic element 101. When no magnetic force is generated, the magnetic phase change material element 301 is spaced apart from the magnetic element; when a preset temperature is reached, the magnetic phase change material element 301 generates a magnetic force and attracts the magnetic element 101, thereby causing the heating film unit 300 to detach from the battery module 200.

[0040] For example, when the heating film unit 300 is heating the battery module 200 normally, if the preset temperature of the magnetic phase change material 301 is not reached, the magnetic phase change material 301 will not be magnetic, and the heating film unit 300 will be in a normal installation state. When the power supply to the heating film unit 300 is out of control and cannot be cut off, the surface temperature of the heating film unit 300 will continue to rise until it reaches the phase change temperature of the magnetic phase change material 301. The magnetic phase change material 301 will regain its magnetism, and the magnetic component 101 inside the battery module 200 will use magnetic force to drive the entire heating film unit 300 to detach from the bottom of the battery module 200. The heating film unit 300 will no longer continue to heat the battery module 200, thus avoiding the risk of thermal runaway caused by continuous heating of the battery module 200.

[0041] According to the battery pack 1 of this embodiment, the magnetic phase change material 301 is isolated from the magnetic component 101 inside the battery casing 100 when it has not reached a preset temperature. When the temperature of the magnetic phase change material 301 reaches the preset temperature, the magnetic phase change material 301 changes its magnetic state, generating a magnetic attraction force, thereby activating the detachment mechanism, and the heating film unit 300 detaches from the battery module 200. This embodiment introduces the magnetic phase change material 301 and applies the magnetic attraction principle. Once the phase change temperature is reached, the heating film unit 300 automatically detaches from the battery module 200, thereby cutting off the heating source. This structure significantly reduces safety hazards caused by overheating and improves the safety of the battery module 200.

[0042] Furthermore, by integrating the heating film unit 300, the magnetic component 101, and the magnetic phase change material component 301 together, the battery pack 1 eliminates the cumbersome structure of the temperature control safety switch, simplifying the number and complexity of components. This not only effectively saves space but also reduces production and assembly costs, while improving the compatibility and modularity of the battery pack 1.

[0043] Therefore, the battery pack 1 according to the present invention has advantages such as high safety and low cost.

[0044] In some optional embodiments of this utility model, reference is made to Figure 4 The heating film unit 300 includes a heating film 310 and a power connector 320. The heating film 310 covers the surface of the battery module 200, for example, the heating film 310 covers the bottom surface of the battery module 200. A magnetic phase change material 301 is attached to the surface of the heating film 310, for example, it is attached to the side of the heating film 310 facing away from the battery module 200. The power connector 320 is electrically connected to the heating film 310. The power connector 320 is mounted on the battery housing 100 and located on one side of the battery module 200. The power connector 320 is adapted to be electrically connected to a heating power source outside the battery housing 100, so that the external power source supplies power to the power connector 320.

[0045] For example, the heating film 310 is glued to the bottom of the battery module 200, and can heat the battery module 200 when it is in a low-temperature environment and needs to be charged. The power cord of the heating film 310 is connected to both the upper and lower structures of the power connector 320, and the heating film 310 is powered by an external power source.

[0046] A heating film 310 is applied to the surface of the battery module 200. The heating film 200 heats the forming surface of the battery module 200, which can effectively increase the operating temperature of the battery and make the heating more uniform. In low-temperature environments, the electrochemical reaction rate of the battery decreases, and the application of the heating film 200 can ensure that the battery operates within the optimal temperature range, thereby improving its discharge capacity and energy efficiency.

[0047] In some optional embodiments of this utility model, such as Figure 3 and Figure 4 As shown, there are multiple magnetic phase change material components 301 and multiple magnetic components 101. Multiple magnetic phase change material components 301 are arranged on the bottom surface of the heating film 310, and multiple magnetic components 101 are arranged on the bottom surface of the battery casing 100. The magnetic phase change material components 301 and the magnetic components 101 correspond to each other one by one.

[0048] Multiple magnetic phase change material components 301 are evenly arranged on the bottom surface of the heating film 310, and the magnetic phase change material components 301 and magnetic components 101 are arranged in a one-to-one correspondence. This can effectively improve the uniformity of the magnetic attraction force on the heating film 310, so that the heating film 310 is subjected to force as a whole, ensuring that the heating film 310 will not come into contact with the battery module 200 in the event of thermal runaway, thus improving safety. In addition, the corresponding arrangement of multiple magnetic phase change material components 301 and magnetic components 101 can also achieve precise positioning of the heating film 310 and the battery casing 100.

[0049] In some optional embodiments of this utility model, such as Figure 3 and Figure 4 As shown, the magnetic phase change material component 301 is arranged in multiple rows and columns along the bottom surface of the battery module 200, and the magnetic component 101 is arranged in multiple rows and columns along the bottom surface of the battery casing 100.

[0050] The multi-row, multi-column arrangement enables a more uniform heat distribution, allowing each part of the battery pack 1 to be heated or cooled quickly and evenly, avoiding uneven stress. The arrayed magnetic phase change material components 301 and 101 have a large contact area and are arranged more dispersedly, allowing the magnetic force generated by the magnetic phase change material components 301 and 101 to cover the entire surface of the heating film 310. When the battery module 200 exceeds the preset temperature, the heating film 310 can be completely detached from under the battery module 200, ensuring that the heating film 310 no longer contacts the battery module 200 in the event of thermal runaway.

[0051] In some optional embodiments of this utility model, such as Figure 4 As shown, the battery module 200 includes multiple battery cells 210. The multiple battery cells 210 are arranged side by side in multiple columns, and multiple magnetic phase change material components 301 are located between two adjacent columns of battery cells 210. The magnetic phase change material components 301 in the same row are arranged along the length direction of the same battery cell 210.

[0052] The magnetic phase change material components 301 in each row are arranged along the length of the battery cell 210, providing sufficient magnetic force within a certain area. When the battery module 200 reaches a preset temperature, it can bond with the magnetic components 101, thereby causing the heating film 310 to detach. At the same time, multiple rows and columns of magnetic phase change material components 301 are evenly arranged at various positions on the bottom surface of the battery cell 210, providing heating protection for the battery cell 210 at different positions.

[0053] In some optional embodiments of this utility model, such as Figures 1-4 As shown, the outer contour of each magnetic phase change material component 301 coincides with that of the corresponding magnetic component 101.

[0054] When the outer contour of the magnetic phase change material component 301 precisely coincides with the magnetic component 101, a stronger attractive force is formed when the two interact. This close fit helps the magnetic phase change material component 301 to quickly and effectively adhere to the magnetic component 101 when its temperature reaches a preset value, thereby causing the heating film unit 300 to detach from the battery module 200. Simultaneously, by aligning the outer contours of the magnetic phase change material component 301 and the magnetic component 101, displacement caused by external forces or temperature changes can be reduced, ensuring the stability of the battery pack 1 system during operation and increasing the overall reliability of the battery pack during use.

[0055] In some optional embodiments of this utility model, such as Figure 4 As shown, the power connector 320 includes a first connector 321 and a second connector 322. The first connector 321 is mounted on one side of the battery housing 100 in the thickness direction, and the second connector 322 is mounted on the other side of the battery housing 100 in the thickness direction. Both the first connector 321 and the second connector 322 are adapted to be connected to an external power source, and both the first connector 321 and the second connector 322 are electrically connected to the heating film 310 to form a current loop.

[0056] Both the first connector 321 and the second connector 322 are electrically connected to the heating film 310, forming a current loop. This enables rapid heating of the battery pack 1 in low-temperature environments, ensuring the battery operates normally at a suitable temperature and improving the performance and safety of the battery pack 1. The dual-connection structure ensures efficient use of electrical energy, allowing for more rational current distribution during both charging and discharging, thereby improving energy efficiency. Furthermore, since the first connector 321 and the second connector 322 are located on opposite sides of the battery casing 100 in the thickness direction, the space within the battery casing 100 is fully utilized, resulting in a larger wiring space and more rational space utilization.

[0057] In some optional embodiments of this utility model, such as Figure 3 As shown, the battery housing 100 includes a bottom shell 110 and a top cover 120. The battery module 200 and the heating film unit 300 are both installed inside the bottom shell 110. A magnetic component 101 is disposed on the inner bottom surface of the bottom shell 110, and a first connector 321 is installed on the bottom surface of the bottom shell 110. The top cover 120 covers the top surface of the bottom shell 110, and a second connector 322 is installed on the top cover 120.

[0058] The bottom shell 110 and the top cover 120 together form a closed battery housing 100, which effectively protects the battery module 200 and heating film unit 300 inside the battery housing 100 from external physical impacts, moisture, and dust, ensuring the safety and reliability of the battery module 200. Meanwhile, the first connector 321 and the second connector 322 make the connection between the bottom shell 110 and the top cover 120 simple and stable, facilitating the quick assembly and disassembly of the battery housing 100 and improving the maintenance convenience of the battery pack 1.

[0059] In some optional embodiments of this utility model, such as Figure 4 As shown, the battery pack 1 also includes a data acquisition board 400. The data acquisition board 400 is disposed on one side of the battery module 200 and located between the first connector 321 and the second connector 322. The data acquisition board 400 is electrically connected to the battery module 200 and the heating film 310, respectively.

[0060] For example, the battery module 200 transmits the battery temperature and voltage information to the acquisition board 400 through a flexible circuit board. The temperature of the heating film 310 is acquired by connecting it to the acquisition board 400 through a thermistor harness. The acquisition board 400 is connected to the first connector 321 through a harness, and transmits the temperature information of the battery module 200 and the heating film 310 to the external battery management system.

[0061] The acquisition board 400 detects and identifies abnormal states of the battery module 200. Once an abnormality occurs in the battery pack 1, the acquisition board 400 transmits the collected information to the battery management system. The battery management system can then take immediate action. The magnetic component 101 uses magnetic force to detach the heating film 310 from below the battery module 200, thus avoiding the risk of runaway caused by continuous heating of the battery pack 1.

[0062] In some optional embodiments of this utility model, such as Figure 4 As shown, the end faces of the acquisition board 400 and the battery module 200 are parallel to each other and spaced apart. A flexible circuit board 500 connects the busbar of the battery module 200 and the acquisition board 400.

[0063] The flexible circuit board 500 serves as the physical connection medium between the busbar of the battery module 200 and the acquisition board 400, enabling efficient transmission of electrical signals from the battery module 200 to the acquisition board 500, thus achieving real-time monitoring and management of the battery status.

[0064] Since the acquisition board 500 and the battery module 200 are arranged parallel to each other and spaced apart, the flexible circuit board 500's bendability can flexibly adapt to the spatial distance and relative position between them, solving the problem of rigid circuit boards having difficulty in wiring in narrow or non-coplanar spaces.

[0065] In addition, the flexible circuit board 500 can reduce interference in signal transmission and ensure the accuracy of collected data, making it particularly suitable for the high-precision monitoring requirements of battery management systems.

[0066] In some optional embodiments of this utility model, such as Figure 2 As shown, the battery unit 210 has an end plate bracket 211 on the side facing the acquisition plate 400, and the battery housing 100 has a crossbeam bracket 102 spanning opposite sides of its inner side. The crossbeam bracket 102 is mounted on the end plate bracket 211, and the acquisition plate 400 is mounted on the crossbeam bracket 102.

[0067] The end plate bracket 211 and the crossbeam bracket 102 together provide a stable frame, ensuring the stability of the battery unit 210 and the acquisition board 400 during use and reducing displacement or damage caused by vibration or impact. The combination of the end plate bracket 211 and the crossbeam bracket 102 allows for a more efficient layout within the battery housing 100, improving the overall system's space utilization and avoiding unnecessary space waste.

[0068] Meanwhile, the end plate bracket 211 and the crossbeam bracket 102 provide mounting positions for the data acquisition board 400, making the assembly of the battery unit 210 and the data acquisition board 400 simpler, more stable, and easier for subsequent maintenance and replacement, thus improving the maintainability of the entire battery pack 1 structure. Furthermore, the combination of the end plate bracket 211 and the crossbeam bracket 102 increases the overall structural strength of the battery pack 1, enabling it to better withstand the influence of the external environment and improving structural durability.

[0069] The energy storage system of this utility model embodiment is described below.

[0070] The energy storage system according to an embodiment of the present invention includes the battery pack 1 of the above embodiment of the present invention.

[0071] The energy storage system according to the present invention has advantages such as high safety and low cost by utilizing the battery pack 1 of the above embodiments of the present invention.

[0072] Other components and operations, such as the battery pack 1 and energy storage system according to the embodiments of this utility model, are known to those skilled in the art and will not be described in detail here.

[0073] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0074] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery pack, characterized in that, include: A battery casing, wherein the inner surface of the battery casing is provided with a magnetic element; A battery module, wherein the battery module is installed inside the battery housing; A heating film unit is disposed on the surface of the battery module, and a magnetic phase change material component is connected to the surface of the heating film unit, which is positioned opposite to the magnetic component. In this configuration, the magnetic phase change material component is spaced apart from the magnetic component when no magnetic force is generated. When the magnetic phase change material component reaches a preset temperature, it generates magnetic force and attracts the magnetic component to drive the heating film unit to detach from the battery module.

2. The battery pack according to claim 1, characterized in that, The heating film unit includes: A heating film is provided, covering the surface of the battery module, and the magnetic phase change material is attached to the surface of the heating film. A power connector is electrically connected to the heating film. The power connector is mounted on the battery housing and located on one side of the battery module. The power connector is adapted to be electrically connected to a heating power source outside the battery housing.

3. The battery pack according to claim 2, characterized in that, There are multiple magnetic phase change material components and multiple magnetic components. Multiple magnetic phase change material components are arranged on the bottom surface of the heating film, and multiple magnetic components are arranged on the bottom surface of the battery casing. The magnetic phase change material components and the magnetic components correspond one-to-one with each other.

4. The battery pack according to claim 3, characterized in that, The magnetic phase change material components are arranged in multiple rows and columns along the bottom surface of the battery module, and the magnetic components are arranged in multiple rows and columns along the bottom surface of the battery casing.

5. The battery pack according to claim 4, characterized in that, The battery module includes: Multiple battery cells are arranged side-by-side in multiple columns, and multiple magnetic phase change material elements are located between two adjacent columns of battery cells. The magnetic phase change material elements in the same row are arranged along the length direction of the same battery cell.

6. The battery pack according to claim 3, characterized in that, Each of the magnetic phase change material components coincides with the outer contour of the corresponding magnetic component.

7. The battery pack according to claim 2, characterized in that, The power connector includes: A first connector and a second connector are provided. The first connector is installed on one side of the battery housing in the thickness direction, and the second connector is installed on the other side of the battery housing in the thickness direction. Both the first connector and the second connector are adapted to be connected to an external power source, and both the first connector and the second connector are electrically connected to the heating film to form a current loop.

8. The battery pack according to claim 7, characterized in that, The battery casing includes: The bottom shell, the battery module and the heating film unit are both installed inside the bottom shell, the magnetic component is disposed on the inner bottom surface of the bottom shell, and the first plug-in component is installed on the bottom surface of the bottom shell; A top cover that covers the top surface of the bottom shell, and the second connector is mounted on the top cover.

9. The battery pack according to claim 7, characterized in that, Also includes: A data acquisition board is disposed on one side of the battery module and located between the first connector and the second connector. The data acquisition board is electrically connected to the battery module and the heating film, respectively.

10. The battery pack according to claim 9, characterized in that, The acquisition board and the end face of the battery module are parallel to each other and spaced apart. A flexible circuit board connects the busbar of the battery module and the acquisition board.

11. The battery pack according to claim 9, characterized in that, The battery unit has an end plate bracket on the side facing the acquisition board, and the battery housing has a crossbeam bracket spanning opposite sides of its inner side. The crossbeam bracket is mounted on the end plate bracket, and the acquisition board is mounted on the crossbeam bracket.

12. An energy storage system, characterized in that, include: The battery pack according to any one of claims 1-11.

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