Battery management system and energy storage device

Abstract

The utility model discloses a kind of battery management system and energy storage device, battery management system includes shell, at least one mounting bracket and at least one battery management unit, mounting bracket is fixedly installed in shell, and battery management unit is fixedly installed on mounting bracket.The utility model installs battery management unit in shell by mounting bracket, battery management system can be modularized, it is convenient to install and maintain battery processing unit, it is convenient to modularization standardization production, reduce production cost, accelerate product delivery speed.

Description

Technical Field

[0001] This utility model belongs to the field of energy storage device technology, specifically relating to a battery management system and an energy storage device. Background Technology

[0002] Energy storage devices are configured to store electrical energy. Existing energy storage devices typically consist of a casing, a battery pack composed of multiple battery cells connected in series or parallel, and a battery management unit (BMU) that monitors the battery status. The energy storage device houses the battery pack and BMU within the same casing, resulting in a complex installation structure that is inconvenient for installation and maintenance, leads to low production efficiency, high costs, and slow delivery.

[0003] Therefore, in order to address the aforementioned technical problems, it is necessary to provide a battery management system and an energy storage device.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0005] The purpose of this utility model is to provide a battery management system and energy storage device that is easy to install and maintain, facilitates modular and standardized production, reduces production and processing costs, and speeds up product delivery.

[0006] To achieve the above objectives, the technical solution provided by a specific embodiment of this utility model is as follows:

[0007] A battery management system includes a housing, at least one mounting bracket, and at least one battery management unit, wherein the mounting bracket is fixedly installed inside the housing, and the battery management unit is fixedly installed on the mounting bracket.

[0008] In one or more embodiments of the present invention, the mounting bracket includes a main body, a first mounting part located on one side of the main body, and a second mounting part bent from the main body toward the battery management unit. The housing is fixedly mounted to the first mounting part, and at least one battery management unit is fixedly mounted to the second mounting part.

[0009] In one or more embodiments of the present invention, the battery management system includes a plurality of battery management units, and the mounting bracket further includes a third mounting portion located on the other side of the main body. The third mounting portion bends from the main body toward the battery management unit, and the third mounting portion is fixedly mounted to the battery management unit that is opposite to the first mounting portion.

[0010] In one or more embodiments of the present invention, the battery management system includes a plurality of battery management units, and the mounting bracket includes a plurality of second mounting portions spaced apart along the arrangement direction of the battery management units.

[0011] In one or more embodiments of the present invention, the first mounting portion includes a first bending portion that bends from the main body portion toward the battery management unit, and a first mounting plate is provided on the housing, the first mounting plate being fixedly mounted to the first bending portion.

[0012] In one or more embodiments of the present invention, the first mounting portion includes a first bending portion and a second bending portion that bend from the battery management unit toward the main body portion, and a first connecting portion that connects the first bending portion and the second bending portion. Both the first bending portion and the second bending portion are fixedly mounted to the first mounting plate.

[0013] In one or more embodiments of the present invention, the mounting bracket further includes a fourth mounting portion, wherein the first mounting portion and the fourth mounting portion are disposed opposite to each other on both sides of the main body portion, and the fourth mounting portion is fixedly mounted to the housing.

[0014] In one or more embodiments of the present invention, the fourth mounting portion includes a third bending portion that bends from the main body portion toward the battery management unit, and a second mounting plate is provided on the housing, the second mounting plate being fixedly mounted to the third bending portion.

[0015] In one or more embodiments of the present invention, the fourth mounting portion includes a third bending portion and a fourth bending portion that bend from the battery management unit toward the main body portion, and a second connecting portion that connects the third bending portion and the fourth bending portion, wherein the third bending portion and the fourth bending portion are both fixedly mounted to the second mounting plate.

[0016] The technical solution provided by another specific embodiment of this utility model is as follows:

[0017] An energy storage device, the energy storage device comprising:

[0018] shell;

[0019] The battery pack is disposed within the housing;

[0020] As described above, the housing of the battery management system is fixedly mounted on the outer casing, and the battery management unit of the battery management system is connected to the battery pack.

[0021] Compared with the prior art, the battery management system of this utility model has the following advantages:

[0022] This invention uses a mounting bracket to install the battery management unit into the housing, which modularizes the battery management system, facilitates the installation and maintenance of the battery processing unit, enables modular and standardized production, reduces production costs, and speeds up product delivery. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a three-dimensional structural diagram of the battery management system in Embodiment 1 of this utility model;

[0025] Figure 2 for Figure 1 Enlarged view of the local structure at point A;

[0026] Figure 3 This is a three-dimensional structural diagram of the mounting bracket in Embodiment 1 of this utility model;

[0027] Figure 4 This is a schematic diagram of the unfolded structure of the mounting bracket in Embodiment 1 of this utility model;

[0028] Figure 5 This is a three-dimensional structural diagram of the shell in Embodiment 1 of this utility model;

[0029] Figure 6 This is a schematic diagram of the unfolded structure of the mounting bracket in Embodiment 2 of this utility model;

[0030] Figure 7 This is a schematic diagram of the unfolded structure of the mounting bracket in Embodiment 3 of this utility model;

[0031] Figure 8 This is a schematic diagram of the unfolded structure of the mounting bracket in Embodiment 4 of this utility model;

[0032] Figure 9 This is a schematic diagram of the unfolded structure of the mounting bracket in Embodiment 5 of this utility model;

[0033] Figure 10 This is a three-dimensional structural diagram of the shell in Embodiment 5 of this utility model.

[0034] Explanation of key figure labels:

[0035] 1-Housing; 11-First mounting plate; 12-Second mounting plate; 13-Assembly section;

[0036] 2-Mounting bracket; 21-Main body; 22-First mounting part; 221-First bending part; 222-First connecting part; 223-Second bending part; 23-Second mounting part; 24-Third mounting part; 25-Fourth mounting part; 251-Third bending part; 252-Second connecting part; 253-Fourth bending part;

[0037] 3-Battery Management Unit. Detailed Implementation

[0038] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0039] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0040] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0041] The technical solution of this utility model will now be described with reference to the accompanying drawings.

[0042] Example 1:

[0043] Reference Figure 1 , Figure 2As shown, the battery management system of this application includes a housing 1, at least one mounting bracket 2, and at least one battery management unit 3. The mounting bracket 2 is fixedly installed inside the housing 1, and the battery management unit 3 is fixedly installed on the mounting bracket 2. Exemplarily, in this embodiment, there are two mounting brackets 2 and two battery management units 3. The two mounting brackets 2 are symmetrically arranged at both ends of the battery management unit 3, and each mounting bracket 2 is installed with two battery management units 3. Both ends of each battery management unit 3 can be fixedly installed in the housing 1 through the mounting bracket 2. Of course, this application is not limited to this; in other embodiments, there is only one mounting bracket 2, which is fixedly installed with one of the ends of the battery management unit 3. In other embodiments, the battery management unit 3 can be one, three, four, etc. This application does not limit the number of mounting brackets 2 or the number of battery management units 3. Based on this design, the battery management system can be modularized, facilitating the installation and maintenance of the battery processing unit, enabling modular and standardized production, reducing production costs, and accelerating product delivery.

[0044] To facilitate the secure mounting of the battery management unit 3 and the housing 1 together using the mounting bracket 2, refer to... Figure 3 , Figure 4 As shown, the mounting bracket 2 in this application includes a main body 21, a first mounting portion 22 located on one side of the main body 21, and a second mounting portion 23 bent from the main body 21 toward the battery management unit 3. The housing 1 is fixedly mounted to the first mounting portion 22, and at least one battery management unit 3 is fixedly mounted to the second mounting portion 23. For example, since there are two mounting brackets 2 and two battery management units 3 in this embodiment, there is one second mounting portion 23, which is fixedly mounted to the battery management unit 3 near the first mounting portion 22. Of course, this application is not limited to this; in other embodiments, there may be two, three, four, etc., second mounting portions 23. In this embodiment, the number of second mounting portions 23 is one less than the number of battery management units 3.

[0045] Optionally, refer to Figure 3 , Figure 4As shown, the battery management system in this application includes multiple battery management units 3. The mounting bracket 2 also includes a third mounting portion 24 located on the other side of the main body 21. The third mounting portion 24 bends from the main body 21 toward the battery management unit 3, and is fixedly mounted to the battery management unit 3 that is away from the first mounting portion 22. For example, the battery management system in this embodiment includes two battery management units 3. The battery management unit 3 closer to the first mounting portion 22 is fixedly mounted to the second mounting portion 23, and the battery management unit 3 away from the first mounting portion 22 is fixedly mounted to the third mounting portion 24. According to this design, the mounting bracket 2 is directly manufactured in one step through a bending process, facilitating standardized production, reducing production costs, and accelerating product delivery. Of course, this application is not limited to this. In other embodiments, the battery management system may include three, four, or five battery management units 3, etc., as long as the battery management unit 3 furthest from the first mounting portion 22 is fixedly mounted to the third mounting portion 24, and the other battery management units 3 are fixedly mounted to the second mounting portion 23.

[0046] Reference Figure 2 , Figure 3 and Figure 5 As shown, the first mounting portion 22 in this application includes a first bent portion 221 that bends from the main body 21 toward the battery management unit 3. A first mounting plate 11 is provided on the housing 1, and the first mounting plate 11 is fixedly mounted to the first bent portion 221. Compared to the method of directly fixing the first mounting portion 22 to the side wall of the housing 1, this embodiment directly fixes the first mounting portion 22 and the first mounting plate 11, which facilitates maintaining the overall airtightness of the housing 1 during the fixing process of the first mounting portion 22 and the housing 1, and prevents the formation of gaps on the housing 1. The housing 1 in this application can be processed by integral stamping, which has good overall airtightness, ensuring that the battery management system is not corroded by moisture and other substances, and improving the service life of the battery management system.

[0047] Furthermore, in order to strengthen the fixed installation of the first mounting part 22 and the first mounting plate 11 and prevent the first mounting part 22 from detaching from the first mounting plate 11, refer to Figure 2 , Figure 3 and Figure 5 As shown, the first mounting portion 22 in this application includes a second bent portion 223 that bends from the battery management unit 3 toward the main body portion 21, and a first connecting portion 222 that connects the first bent portion 221 and the second bent portion 223. The second bent portion 223 is fixedly mounted to the first mounting plate 11. By fixing both the first bent portion 221 and the second bent portion 223 to the first mounting plate 11, the connection between the first mounting portion 22 and the first mounting plate 11 is made more stable and reliable.

[0048] It should be noted that the first mounting part 22 and the housing 1, the second mounting part 23 and the battery management unit 3, and the third mounting part 24 and the battery management unit 3 in this application are all fixedly mounted by fasteners. The fasteners in this application can be bolts, screws, studs, studs, or other structures that connect two components.

[0049] Example 2:

[0050] The housing 1 and battery management unit 3 in this embodiment are roughly the same as those in Embodiment 1, except that the structure of the mounting bracket 2 is different.

[0051] Specifically, refer to Figure 6 As shown, the battery management system in this embodiment includes a battery management unit 3. In order to facilitate the fixed installation of the battery management unit 3 and the housing 1 together by means of the mounting bracket 2, the mounting bracket 2 in this embodiment includes a main body 21, a first mounting part 22 located on one side of the main body 21, and a second mounting part 23 bent from the main body 21 toward the battery management unit 3. The housing 1 is fixedly installed with the first mounting part 22, and the battery management unit 3 is fixedly installed with the second mounting part 23.

[0052] Example 3:

[0053] The housing 1 and battery management unit 3 in this embodiment are roughly the same as those in Embodiment 1, except that the structure of the mounting bracket 2 is different.

[0054] The battery management system in this application includes multiple battery management units 3. Specifically, refer to... Figure 7 As shown, in order to facilitate the fixed installation of the battery management unit 3 and the housing 1 together by means of the mounting bracket 2, the mounting bracket 2 in this embodiment includes a main body 21, a first mounting part 22 located on one side of the main body 21, and a plurality of second mounting parts 23 bent from the main body 21 toward the battery management unit 3. The second mounting parts 23 are spaced apart along the arrangement direction of the battery management units 3. The housing 1 is fixedly installed with the first mounting part 22, and the battery management unit 3 corresponds one-to-one with the second mounting part 23. In this embodiment, the number of second mounting parts 23 is equal to the number of battery management units 3, and each battery management unit 3 is fixedly installed with the corresponding second mounting part 23.

[0055] For example, the battery management system in this embodiment includes two battery management units 3, and the mounting bracket 2 includes two second mounting portions 23. The second mounting portions 23 are spaced apart along the arrangement direction of the battery management units 3. The housing 1 is fixedly mounted to the first mounting portion 22, and the battery management units 3 correspond one-to-one with the second mounting portions 23. Each battery management unit 3 is fixedly mounted to its corresponding second mounting portion 23. Of course, this application is not limited to this. In other embodiments, the battery management system includes three battery management units 3, or four battery management units 3, or five battery management units 3, or six battery management units 3, etc.

[0056] Example 4:

[0057] The housing 1 and battery management unit 3 in this embodiment are roughly the same as those in Embodiment 1, except that the structure of the mounting bracket 2 is different.

[0058] The battery management system in this application includes multiple (three or more) battery management units 3. To facilitate the fixed installation of the battery management units 3 and the housing 1 together via the mounting bracket 2, specifically, refer to... Figure 8 As shown, the mounting bracket 2 in this embodiment includes a main body 21, a first mounting portion 22 located on one side of the main body 21, a plurality of second mounting portions 23 bent from the main body 21 toward the battery management unit 3, and a third mounting portion 24 located on the other side of the main body 21. In this embodiment, the number of second mounting portions 23 is one less than the number of battery management units 3. The second mounting portions 23 are spaced apart along the arrangement direction of the battery management units 3, and the third mounting portions 24 are bent from the main body 21 toward the battery management unit 3. The housing 1 is fixedly mounted to the first mounting portion 22, the battery management unit 3 furthest from the first mounting portion 22 is fixedly mounted to the third mounting portion 24, and the remaining battery management units 3 are fixedly mounted to the second mounting portions 23.

[0059] For example, the battery management system in this embodiment includes three battery management units 3. The mounting bracket 2 includes a main body 21, a first mounting part 22, two second mounting parts 23, and a third mounting part 24. The housing 1 is fixedly mounted to the first mounting part 22. The third mounting part 24 and the battery management unit 3 furthest from the first mounting part 22 are fixedly mounted. The other battery management units 3 are fixedly mounted to the second mounting parts 23. Of course, this application is not limited to this. In other embodiments, the battery management system includes four battery management units 3, or five battery management units 3, or six battery management units 3, etc.

[0060] Example 5;

[0061] The battery management unit 3 in this embodiment is largely the same as the battery management unit 3 in Embodiment 1, except that the structures of the housing 1 and the mounting bracket 2 are different.

[0062] The battery management system in this application includes multiple battery management units 3. To facilitate the fixed installation of the battery management units 3 and the housing 1 together using the mounting bracket 2, specifically, refer to... Figure 9 As shown, the mounting bracket 2 in this embodiment includes a main body 21, a first mounting part 22 located on one side of the main body 21, and a plurality of second mounting parts 23 and a fourth mounting part 25 that bend from the main body 21 toward the battery management unit 3. The second mounting parts 23 are spaced apart along the arrangement direction of the battery management units 3. The housing 1 is fixedly mounted to the first mounting part 22, and the battery management units 3 correspond one-to-one with the second mounting parts 23. In this embodiment, the number of second mounting parts 23 is equal to the number of battery management units 3. Each battery management unit 3 is fixedly mounted to the corresponding second mounting part 23. The first mounting part 22 and the fourth mounting part 25 are arranged opposite each other on both sides of the main body 21, and the fourth mounting part 25 is fixedly mounted to the housing 1. According to this design, both ends of the mounting bracket 2 can be fixedly mounted to the housing 1 through the first mounting part 22 and the fourth mounting part 25 respectively, thereby more securely mounting the mounting bracket 2 onto the housing 1, so as to more securely and reliably fix the battery management unit 3 in the housing 1 through the mounting bracket 2.

[0063] For example, the battery management system in this embodiment includes two battery management units 3. The mounting bracket 2 includes a main body 21, a first mounting part 22, two second mounting parts 23, and a fourth mounting part 25. The housing 1 is fixedly mounted to the first mounting part 22. The second mounting parts 23 are spaced apart along the arrangement direction of the battery management units 3. The first mounting part 22 is fixedly mounted to the housing 1. Each battery management unit 3 corresponds one-to-one with the second mounting part 23. The fourth mounting part 25 is fixedly mounted to the housing 1. Of course, this application is not limited to this. In other embodiments, the battery management system includes three battery management units 3, or four battery management units 3, or five battery management units 3, or six battery management units 3, etc., wherein the number of second mounting parts 23 is equal to the number of battery management units 3.

[0064] To facilitate the fixed installation of the fourth mounting part 25 and the housing 1, refer to Figure 10 As shown, the fourth mounting part 25 in this application includes a third bending part 251 that bends from the main body part 21 toward the battery management unit 3. A second mounting plate 12 is provided on the housing 1, and the second mounting plate 12 is fixedly mounted to the third bending part 251.

[0065] Furthermore, in order to strengthen the fixed installation of the fourth mounting part 25 and the second mounting plate 12 and prevent the fourth mounting part 25 from detaching from the second mounting plate 12, refer to Figure 10 As shown, the fourth mounting portion 25 in this application also includes a fourth bent portion 253 that bends from the battery management unit 3 toward the main body portion 21, and a second connecting portion 252 that connects the third bent portion 251 and the fourth bent portion 253. The fourth bent portion 253 is fixedly mounted to the second mounting plate 12. By fixing both the third bent portion 251 and the fourth bent portion 253 to the second mounting plate 12, the connection between the fourth mounting portion 25 and the second mounting plate 12 is made more stable and reliable.

[0066] It should be noted that the first mounting part 22 and the first mounting plate 11, the second mounting part 23 and the battery management unit 3, the third mounting part 24 and the battery management unit 3, and the fourth mounting part 25 and the second mounting plate 12 in this application are all fixedly mounted by fasteners. The fasteners in this application can be bolts, screws, studs, studs, or other structures that connect two components.

[0067] Example 6:

[0068] The energy storage device in this embodiment includes a housing, a battery pack, and a battery management system as shown in any of Embodiments 1 to 5. The battery pack is disposed within the housing; the housing 1 of the battery management system is fixedly mounted on the housing, and the battery management unit 3 of the battery management system is connected to the battery pack. According to this design, the battery management unit 3 can be partially installed outside the energy storage device, simplifying the internal structure of the energy storage device, facilitating installation and maintenance, improving production efficiency, reducing production costs, and accelerating product delivery.

[0069] To securely mount the battery management system housing 1 to the outer casing, the outer casing has an opening through which the battery management unit 3 can extend into the outer casing. In this embodiment, the housing 1 has an assembly portion 13 surrounding the periphery of the housing 1 (see...). Figure 5 , Figure 10 The assembly part 13 can cover the housing 1 onto the opening of the outer shell using fasteners. The fasteners in this application can be structures that connect two components, such as bolts, screws, studs, etc.

[0070] It should be noted that the battery management unit 3, battery pack and other structures not described in detail in this application can all adopt existing solutions in the prior art, which can be understood and accepted by those skilled in the art, and therefore will not be described in detail.

[0071] In the description of the embodiments of this utility model, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and simplify the description, and are not intended to indicate or imply that the device or component 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.

[0072] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0073] In the description of the embodiments of this utility model, it should also be noted that the terms "first" and "second" used herein do not specifically refer to any order or sequence, nor are they intended to limit this case; they are merely used to distinguish components or operations described using the same technical terms.

[0074] It should be noted that, for the purpose of more clearly describing the structure, the term "distal end" is defined herein as the end furthest from the operator during operation, and "proximal end" as the end closest to the operator during operation. Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0075] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0076] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A battery management system, characterized in that, The battery management system includes a housing, at least one mounting bracket, and at least one battery management unit. The mounting bracket is fixedly installed inside the housing, and the battery management unit is fixedly installed on the mounting bracket.

2. The battery management system according to claim 1, characterized in that, The mounting bracket includes a main body, a first mounting part located on one side of the main body, and a second mounting part that bends from the main body toward the battery management unit. The housing is fixedly mounted to the first mounting part, and at least one of the battery management units is fixedly mounted to the second mounting part.

3. The battery management system according to claim 2, characterized in that, The battery management system includes multiple battery management units, and the mounting bracket also includes a third mounting part located on the other side of the main body. The third mounting part bends from the main body toward the battery management unit, and the third mounting part is fixedly mounted to the battery management unit that is opposite to the first mounting part.

4. The battery management system according to claim 2, characterized in that, The battery management system includes multiple battery management units, and the mounting bracket includes multiple second mounting portions spaced apart along the arrangement direction of the battery management units.

5. The battery management system according to claim 2, characterized in that, The first mounting portion includes a first bending portion that bends from the main body portion toward the battery management unit, and a first mounting plate is provided on the housing, the first mounting plate being fixedly mounted to the first bending portion.

6. The battery management system according to claim 2, characterized in that, The first mounting portion includes a first bending portion and a second bending portion that bend from the battery management unit toward the main body, and a first connecting portion that connects the first bending portion and the second bending portion. Both the first bending portion and the second bending portion are fixedly mounted to the first mounting plate.

7. The battery management system according to claim 2, characterized in that, The mounting bracket further includes a fourth mounting part, and the first mounting part and the fourth mounting part are disposed opposite to each other on both sides of the main body, and the fourth mounting part is fixedly mounted to the housing.

8. The battery management system according to claim 7, characterized in that, The fourth mounting part includes a third bending part that bends from the main body to the battery management unit, and a second mounting plate is provided on the housing, the second mounting plate being fixedly mounted to the third bending part.

9. The battery management system according to claim 7, characterized in that, The fourth mounting portion includes a third bending portion and a fourth bending portion that bend from the battery management unit toward the main body, and a second connecting portion that connects the third bending portion and the fourth bending portion. Both the third bending portion and the fourth bending portion are fixedly mounted to the second mounting plate.

10. An energy storage device, characterized in that, The energy storage device includes: shell; The battery pack is disposed within the housing; The battery management system according to any one of claims 1 to 9, wherein the housing of the battery management system is fixedly mounted on the outer casing, and the battery management unit of the battery management system is electrically connected to the battery pack.

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