A limiting device of a battery system BMU and a battery system

Abstract

The application relates to the battery technical field and discloses a limiting device of a battery system BMU and the battery system. The limiting device of the battery system BMU comprises a limiting piece and an insertion piece. The limiting piece is provided with a liquid cooling plate connecting structure for being connected with a liquid cooling plate. The limiting piece comprises a first clamping plate and a second clamping plate. The first clamping plate and the second clamping plate are arranged at an angle to form a clamping space between the first clamping plate and the second clamping plate. The insertion piece is arranged on a battery management unit. At least part of the insertion piece is inserted into the clamping space and abuts against the first clamping plate and the second clamping plate. According to the application, the first clamping plate and the second clamping plate are arranged at an angle to form the clamping space, and at least part of the insertion piece is inserted into the clamping space, so that the movement of the battery management unit towards the liquid cooling plate can be limited. Meanwhile, the overall structure of the insertion piece and the limiting piece is simple, and the assembly process of the insertion piece and the limiting piece is simple.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a limiting device for a battery system BMU and a battery system. Background Technology

[0002] In battery systems, the battery management unit (BMU) is typically mounted above a liquid cooling plate. To ensure the stability of the BMU under complex operating conditions such as vibration, shock, and temperature changes, and to prevent electrical connection failures, signal interference, or structural damage caused by its displacement towards the liquid cooling plate, existing technologies generally employ limiting devices to mechanically constrain the BMU.

[0003] However, most existing limit devices have complex structures and cumbersome assembly processes. Utility Model Content

[0004] In view of this, this application provides a limiting device for a battery system (BMU) and an energy storage battery system to solve or improve the problems of existing limiting devices for mechanically constraining the BMU, which have complex structures and cumbersome assembly processes.

[0005] In a first aspect, this application provides a limiting device for a battery management unit (BMU), including a limiting member and an insert. The limiting member is provided with a liquid cooling plate connection structure for connecting to a liquid cooling plate. The limiting member includes a first clamping plate and a second clamping plate, which are arranged at an angle to form a clamping space between them. The insert is used to be disposed on the battery management unit, and at least a portion of the insert is inserted into the clamping space and abuts against the first clamping plate and the second clamping plate.

[0006] Beneficial effects: By setting the first and second clamping plates at an angle to form a clamping space, and with at least a portion of the insert inserted into this space, the constraint force generated by the angle can limit the displacement of the insert, thereby restricting the battery management unit from moving towards the liquid cooling plate. This maintains the stability of the battery management unit under complex operating conditions such as vibration, impact, and temperature changes, preventing electrical connection failure, signal interference, or structural damage to the battery management unit. Furthermore, the overall structure of the insert and the limiting component is simple, and their assembly process is easy, facilitating the manufacturing and assembly of the limiting device.

[0007] In one alternative embodiment, the insert includes an insertion segment having opposing first and second ends, the first end of the insertion segment facing the limiting member, and the insertion segment having a tapered thickness in the direction from the second end to the first end.

[0008] Beneficial effects: The first end of the insertion segment is oriented towards the limiting member, ensuring that the insertion direction of the insertion segment is consistent with the opening direction of the clamping space of the limiting member, thus forming a clear assembly guide and facilitating the insertion of the insertion segment into the clamping space. Simultaneously, the gradually decreasing thickness of the insertion segment allows the first end of the insertion segment to penetrate deeply into the clamping space, increasing the contact area between the insertion segment and the first and second clamping plates, thereby improving the clamping stability of the insertion segment by the first and second clamping plates.

[0009] In one alternative embodiment, the insert further includes a connecting segment for connection to the battery management unit, and the connecting segment is connected to a second end of the insert, the thickness of the connecting segment being greater than or equal to the thickness of the second end of the insert.

[0010] Beneficial effects: By setting a connecting segment at the second end of the insertion segment, the connecting segment serves as a transition structure and connects with the battery management unit. The thickness of the connecting segment is greater than or equal to the thickness of the second end of the insertion segment, thereby improving the connection strength between the connecting segment and the battery management unit and preventing deformation or breakage at the connection between the connecting segment and the battery management unit under complex working conditions such as vibration, impact and temperature changes.

[0011] In one alternative embodiment, the limiting member includes a plurality of first clamping plates and a plurality of second clamping plates spaced apart along a first direction, with the first clamping plates and the second clamping plates being alternately arranged.

[0012] Beneficial effects: By arranging multiple first clamping plates and second clamping plates along the first direction, and the alternating arrangement of the first clamping plates and second clamping plates to form a spatially staggered structure, the limiting strength of the insert can be significantly improved, preventing the insert from excessively squeezing the limiting member and causing damage to the limiting member. Even if some of the first clamping plates and second clamping plates are damaged, the insertion can still be limited, thereby improving the service life of the limiting member.

[0013] In one alternative embodiment, the liquid cooling plate connection structure is configured as a connecting plate, wherein a plurality of first clamping plates and a plurality of second clamping plates are disposed on the connecting plate.

[0014] Beneficial effects: By setting a connecting plate, multiple first and second clamping plates are integrated into the connecting plate, thereby forming a unified installation benchmark, reducing assembly errors of multiple first and second clamping plates, and enabling the insert to obtain more uniform contact pressure within the clamping space. Furthermore, the connecting plate, as the main load-bearing component, simplifies the connection structure between the liquid cooling plate and the limiting component, avoiding excessive damage to the surface structure of the liquid cooling plate caused by the installation of the limiting component, and facilitating the connection between the limiting component and the liquid cooling plate.

[0015] In one alternative embodiment, the first clamping plate is perpendicular to the connecting plate.

[0016] Beneficial effects: The first clamping plate and the connecting plate are perpendicular to each other, forming a relatively stable right-angle support structure, thereby improving the bending resistance of the first clamping plate when bearing the load of the battery management unit. At the same time, the first clamping plate is adapted to the insertion direction of the insert, which can ensure the positioning accuracy of the insert in the clamping space, realize the quick alignment and installation of the insert, and avoid assembly difficulties caused by angular deviation.

[0017] In one alternative embodiment, the connecting plate is provided with mounting holes, and fasteners are inserted through the mounting holes for connecting the connecting plate to the liquid cooling plate.

[0018] Beneficial effects: The fasteners and mounting holes work together to form a rigid connection between the connecting plate and the liquid cooling plate through mechanical locking. While maintaining the connection strength between the connecting plate and the liquid cooling plate, the assembly process of the connecting plate and the liquid cooling plate is simplified, and the connecting plate and the liquid cooling plate are easy to separate, which significantly improves the maintainability of the limiting component.

[0019] In one alternative embodiment, the limiting member is configured as an integrally formed sheet metal part, and the first clamping plate and the second clamping plate are formed by cutting and bending the sheet metal part.

[0020] Beneficial effects: The cutting and bending process forms the first and second clamping plates, ensuring both the accuracy of the included angle between the first and second clamping plates and achieving geometric stability of the clamping space. Simultaneously, the overall structural design of the sheet metal parts reduces mold development costs, enabling the limiting components to be produced in batches through stamping and other processing methods, significantly improving the manufacturing efficiency of the limiting components.

[0021] In one alternative embodiment, the angle of the clamping space formed between the first clamping plate and the second clamping plate is less than 90°.

[0022] Beneficial effects: By setting the angle of the clamping space to less than 90°, the clamping space formed between the first clamping plate and the second clamping plate is an acute angle, which allows the clamping space to generate greater contact pressure and friction when the insert is inserted, thereby enhancing the constraint effect on the insert and thus enhancing the constraint effect on the battery management unit.

[0023] Secondly, this application provides a battery system including a liquid cooling plate, a battery management unit (BMU) and a limiting device for the BMU as described in any of the above claims, wherein the limiting device is connected to the liquid cooling plate and the insert is connected to the battery management unit.

[0024] Beneficial effects: In the battery system described above, the connection between the liquid cooling plate and the limiting component forms a support platform, and the connection between the battery management unit and the insert forms a movable component. The mechanical cooperation between the limiting component and the insert achieves mutual constraint, thereby limiting the movement of the battery management unit towards the liquid cooling plate, maintaining the stability of the battery management unit under complex working conditions such as vibration, impact and temperature changes, preventing electrical connection failure, signal interference or structural damage of the battery management unit, and thus ensuring the normal operation of the battery system. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram showing the positional relationship between the liquid cooling plate and the battery management unit in an embodiment of this application;

[0027] Figure 2 Examples of embodiments of this application Figure 1 A magnified view of a section at point A in the middle;

[0028] Figure 3 This is a schematic diagram showing the connection relationship between the limiting member and the connecting plate in an embodiment of this application;

[0029] Figure 4 This is a schematic diagram of the structure of the insert according to an embodiment of this application.

[0030] Explanation of reference numerals in the attached figures:

[0031] 100, Liquid cooling plate; 200, Battery management unit; X, First direction;

[0032] 1. Limiting component; 11. First clamping plate; 12. Second clamping plate;

[0033] 2. Clamping space;

[0034] 3. Insert; 31. Insert segment; 32. Connecting segment;

[0035] 4. Connecting plate; 5. Mounting holes. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0037] The following is combined Figures 1 to 4 This describes an embodiment of the present application.

[0038] According to an embodiment of this application, in a first aspect, this application provides a limiting device for a battery management unit (BMU), including a limiting member 1 and an insert 3. The limiting member 1 is provided with a liquid cooling plate connection structure for connecting to a liquid cooling plate 100. The limiting member 1 includes a first clamping plate 11 and a second clamping plate 12, which are arranged at an angle to form a clamping space 2 between them. The insert 3 is used to be disposed on the battery management unit 200, and at least a portion of the insert 3 is inserted into the clamping space 2 and abuts against the first clamping plate 11 and the second clamping plate 12.

[0039] First, it should be noted that, as Figure 1 As shown, in this embodiment, the battery management unit 200 is fixedly mounted on the battery pack. Due to the spatial layout constraints of the battery system's structure, the liquid cooling plate 100 and the battery management unit 200 are spatially close to each other, posing a potential risk of contact or interference. Therefore, in the direction where they are close to each other, the battery management unit 200 needs to be constrained to prevent it from moving towards the liquid cooling plate 100 under complex conditions such as vibration, impact, and temperature changes. This avoids electrical connection failure, signal interference, or structural damage caused by physical collision between the two. In the direction where they are far apart, a dedicated limiting mechanism is usually not required.

[0040] like Figure 1 As shown, the first direction X is perpendicular to the direction of the battery management unit 200 near the liquid cooling plate 100. Due to the inherent structural design of the battery pack, the battery management unit 200 can be constrained in the first direction X, so there is usually no need to set a limiting mechanism in the first direction X to constrain the battery management unit 200.

[0041] In this embodiment, as Figure 1 , Figure 2As shown, the limiting member 1 is fixed to the liquid cooling plate 100 through the liquid cooling plate connecting structure, and the adjacent ends of the first clamping plate 11 and the second clamping plate 12 are connected to the liquid cooling plate connecting structure. The insert 3 is fixed to the battery management unit 200. When installing the battery management unit 200, the operator pushes the insert 3 along the clamping space 2. The included angle formed between the first clamping plate 11 and the second clamping plate 12 forces the two sides of the insert 3 to contact the adjacent end faces of the first clamping plate 11 and the second clamping plate 12 respectively. As the insert 3 goes deeper into the clamping space 2, the two sides of the insert 3 abut against the adjacent end faces of the first clamping plate 11 and the second clamping plate 12 respectively. The first clamping plate 11 and the second clamping plate 12 restrict the insert 3 from moving further toward the liquid cooling plate 100, thereby restricting the movement of the battery management unit 200 toward the liquid cooling plate 100. When disassembling the battery management unit 200, it is only necessary to drive the insert 3 to move away from the liquid cooling plate 100 to release the insert 3 from the clamping space 2 and release the constraint on the battery management unit 200.

[0042] This configuration, through the cooperation of the limiting member 1 and the insert 3, ensures that the insert 3 and the limiting member 1 remain in contact after the battery management unit 200 is installed. This restricts the battery management unit 200 from moving further towards the liquid cooling plate 100, maintaining the stability of the battery management unit 200 under complex operating conditions such as vibration, impact, and temperature changes, and preventing electrical connection failure, signal interference, or structural damage. Furthermore, the simple overall structure of the insert 3 and the limiting member 1, along with their easy assembly process, facilitates the manufacturing and assembly of the limiting device.

[0043] In one embodiment, the insert 3 includes an insert segment 31 having a first end and a second end opposite to each other. The first end of the insert segment 31 faces the limiting member 1, and the thickness of the insert segment 31 is gradually reduced in the direction from the second end to the first end.

[0044] In this embodiment, as Figure 2 , Figure 4 As shown, when the insert 3 is inserted into the clamping space 2, the insert segment 31 can be fully inserted into the clamping space 2, or the insert segment 31 can be partially inserted into the clamping space 2. The thickness of the insert segment 31 is gradually reduced in the direction from the second end to the first end, so that the cross-sectional dimensions of the insert segment 31 decrease linearly or non-linearly along the insertion direction.

[0045] With this configuration, as the insertion segment 31 enters the clamping space 2 of the limiting member 1 along the direction from the second end to the first end, the first end of the insertion segment 31 faces the limiting member 1, ensuring that the insertion direction is consistent with the opening direction of the clamping space 2 of the limiting member 1. This forms a clear assembly guide, preventing the insertion segment 31 from getting stuck during insertion into the clamping space 2, thereby reducing the driving force required for the assembly operation of the insertion segment 31 and facilitating its insertion into the clamping space 2. Furthermore, the gradually decreasing thickness of the insertion segment 31 allows the first end of the insertion segment 31 to penetrate deep into the clamping space 2, increasing the contact area between the insertion segment 31 and the first clamping plate 11 and the second clamping plate 12, thereby improving the clamping stability of the insertion segment 31 by the first clamping plate 11 and the second clamping plate 12.

[0046] In one embodiment, the insert 3 further includes a connecting segment 32 for connecting to the battery management unit 200, and the connecting segment 32 is connected to the second end of the insert segment 31, the thickness of the connecting segment 32 being greater than or equal to the thickness of the second end of the insert segment 31.

[0047] In this embodiment, as Figure 4 As shown, the insertion section 31 and the connecting section 32 can adopt an integrally formed plate structure, so that the connecting section 32 and the second end of the insertion section 31 form an integral structure through a continuous transition. When the insert 3 is fixed to the battery management unit 200, the connecting section 32, as a load-bearing base, evenly transfers the installation load to the insertion section 31.

[0048] The tapered structure of the insertion section 31 provides a guiding effect when the limiting member 1 is inserted, while the connecting section 32 is provided with sufficient thickness to improve the connection strength between the connecting section 32 and the battery management unit 200, and to prevent the connection between the connecting section 32 and the battery management unit 200 from deforming or breaking under complex working conditions such as vibration, impact and temperature changes.

[0049] In one embodiment, the limiting member 1 includes a plurality of first clamping plates 11 and a plurality of second clamping plates 12 arranged at intervals along a first direction X, with the first clamping plates 11 and the second clamping plates 12 being arranged alternately.

[0050] In this embodiment, as Figure 1 , Figure 2 , Figure 3 As shown, the first direction X and the insertion direction of the insert 3 are perpendicular to each other. Multiple first clamping plates 11 are arranged at a preset interval along the first direction X, and multiple second clamping plates 12 are also arranged at a preset interval along the first direction X. The multiple first clamping plates 11 and / or multiple second clamping plates 12 can be arranged with equal or unequal intervals. The projections of the multiple first clamping plates 11 and multiple second clamping plates 12 onto the insert 3 are at least partially non-overlapping, resulting in an alternating arrangement of the multiple first clamping plates 11 and multiple second clamping plates 12 along the first direction X.

[0051] With this configuration, by arranging multiple first clamping plates 11 and second clamping plates 12 along the first direction X, and by alternately arranging the first clamping plates 11 and second clamping plates 12 to form a spatially staggered structure, the limiting strength of the insert 3 can be significantly improved, preventing the insert 3 from excessively squeezing the limiting member 1 and causing damage to the limiting member 1. Even if some of the first clamping plates 11 and second clamping plates 12 are damaged, the limiting of the insert 3 can still be maintained, thereby improving the service life of the limiting member 1.

[0052] In one embodiment, the liquid cooling plate connection structure is configured as a connecting plate 4, and a plurality of first clamping plates 11 and a plurality of second clamping plates 12 are disposed on the connecting plate 4.

[0053] In this embodiment, as Figure 2 , Figure 3 As shown, the connecting plate 4 is a plate-shaped structure, fixed to the liquid cooling plate 100 and extending in a direction perpendicular to the liquid cooling plate 100, so that the end of the connecting plate 4 away from the liquid cooling plate 100 approaches the battery management unit 200. Multiple first clamping plates 11 and multiple second clamping plates 12 are preferably fixed to the end of the connecting plate 4 away from the liquid cooling plate 100, so that the clamping space 2 formed by the first clamping plates 11 and the second clamping plates 12 corresponds to the position of the insert 3, facilitating the insertion of the insert 3 into the clamping space 2. Simultaneously, after the insert 3 is inserted into the clamping space 2, the constraint of the connecting plate 4 also ensures that the insert 3 and the liquid cooling plate 100 maintain a certain safe distance, further preventing contact between the liquid cooling plate 100 and the battery management unit 200.

[0054] Furthermore, by setting the connecting plate 4, one end of each of the multiple first clamping plates 11 and multiple second clamping plates 12 is fixedly connected to the connecting plate 4. The connecting plate 4 forms a unified installation reference for the first clamping plates 11 and second clamping plates 12, reducing assembly errors of the multiple first clamping plates 11 and second clamping plates 12, and enabling the insert 3 to obtain a more uniform contact pressure within the clamping space 2. In addition, the connecting plate 4, as the main load-bearing component, simplifies the connection structure between the liquid cooling plate 100 and the limiting component 1, avoiding excessive damage to the surface structure of the liquid cooling plate 100 caused by the installation of the limiting component 1, and facilitating the connection between the limiting component 1 and the liquid cooling plate 100.

[0055] In one embodiment, the first clamping plate 11 is perpendicular to the connecting plate 4.

[0056] In this embodiment, as Figure 3As shown, the first clamping plate 11 and the connecting plate 4 are perpendicular to each other, forming a relatively stable right-angle support structure, thereby improving the bending resistance of the first clamping plate 11 when bearing the load of the battery management unit 200. Simultaneously, the extension direction of the first clamping plate 11 is preferably parallel to the insertion direction of the insert 3. During the insertion of the insert 3 into the clamping space 2, the first clamping plate 11 can support and guide the insertion section 31 of the insert 3, maintaining the positioning accuracy of the insert 3 within the clamping space 2, enabling rapid alignment and installation of the insert 3, and avoiding assembly difficulties caused by angular deviations.

[0057] In one embodiment, the connecting plate 4 is provided with mounting holes 5, and fasteners are inserted through the mounting holes 5. The fasteners are used to connect the connecting plate 4 to the liquid cooling plate 100.

[0058] In this embodiment, as Figure 3 As shown, the connecting plate 4 has at least one mounting hole 5, and the liquid cooling plate 100 has a mounting position that matches the mounting hole 5. Fasteners (not shown in the figure) pass through the mounting hole 5 on the connecting plate 4 and the mounting position on the liquid cooling plate 100, and the connecting plate 4 is fixed to the liquid cooling plate 100 by means of fasteners.

[0059] With this configuration, the fasteners and mounting holes 5 work together to form a rigid connection between the connecting plate 4 and the liquid cooling plate 100 through mechanical locking. While maintaining the connection strength between the connecting plate 4 and the liquid cooling plate 100, the assembly process of the connecting plate 4 and the liquid cooling plate 100 is simplified, and the connecting plate 4 and the liquid cooling plate 100 are easy to separate, which significantly improves the maintainability of the limiting component 1.

[0060] Optionally, the fasteners can be bolts, screws or rivets, which are inserted through the mounting holes 5 to form a locking structure, thereby satisfying the need for fixing with liquid cooling plates 100 of different materials.

[0061] Of course, in addition to using the mounting holes 5 and fasteners to connect the connecting plate 4 to the liquid cooling plate 100, the connecting plate 4 can also be detachably connected to the liquid cooling plate 100 by means of bonding, snap-fit, etc.

[0062] In one embodiment, the limiting member 1 is configured as an integrally formed sheet metal part, and the first clamping plate 11 and the second clamping plate 12 are formed by cutting and bending the sheet metal part.

[0063] In this embodiment, as Figure 3 As shown, the limiting member 1 can be formed by processing a single metal plate or a plate of other materials. After cutting the plate, a portion of the plate is bent to form a second clamping plate 12, and the unbent portion of the plate forms a first clamping plate 11.

[0064] This configuration, through cutting and bending processes to form the first clamping plate 11 and the second clamping plate 12, ensures both the accuracy of the included angle between the first clamping plate 11 and the second clamping plate 12 and the geometric stability of the clamping space 2. Simultaneously, the overall structural design of the sheet metal part reduces mold development costs, enabling the limiting part 1 to be produced in batches through stamping and other processing methods, significantly improving the manufacturing efficiency of the limiting part 1.

[0065] Optionally, the limiting member 1 and the connecting plate 4 are integrally formed sheet metal parts. During manufacturing, a sheet metal can be bent into an L-shape, with one straight edge serving as the connecting plate 4 and the other as the limiting member 1. The limiting member 1 is then partially cut and bent to form the first clamping plate 11 and the second clamping plate 12. Alternatively, a portion of a sheet metal can be partially bent to form the first clamping plate 11 and the second clamping plate 12 before bending the sheet metal. This manufacturing method facilitates the production of the limiting member 1 and the connecting plate 4, reducing manufacturing costs.

[0066] In one embodiment, the angle of the clamping space formed between the first clamping plate 11 and the second clamping plate 12 is less than 90°.

[0067] In this embodiment, as Figure 3 As shown, by setting the angle of the clamping space 2 to be less than 90°, the clamping space formed between the first clamping plate 11 and the second clamping plate 12 is an acute angle, so that the clamping space 2 can generate greater contact pressure and friction when the insert 3 is inserted, thereby enhancing the constraint effect on the insert 3 and thus enhancing the constraint effect on the battery management unit 200.

[0068] Optionally, the included angle formed by the first clamping plate 11 and the second clamping plate 12 is 15°-45°. This results in a smaller opening angle of the clamping space 2, reducing the space occupied by the limiting member 1. At the same time, it also reduces the thickness of the insert 3, thereby reducing the material used in the insert 3 and lowering the overall weight of the limiting device.

[0069] Secondly, this application provides a battery system including a liquid cooling plate 100, a battery management unit 200, and a limiting device for the battery system BMU of any of the above. The limiting member 1 is connected to the liquid cooling plate 100, and the insert 3 is connected to the battery management unit 200.

[0070] In this embodiment, as Figure 1As shown, in the battery system described above, a support platform is formed by connecting the liquid cooling plate 100 and the limiting member 1, and a movable component is formed by connecting the battery management unit 200 and the insert 3. The mechanical cooperation between the limiting member 1 and the insert 3 achieves mutual constraint, thereby limiting the movement of the battery management unit 200 towards the liquid cooling plate 100, maintaining the stability of the battery management unit 200 under complex working conditions such as vibration, impact and temperature changes, preventing electrical connection failure, signal interference or structural damage of the battery management unit 200, and thus ensuring the normal operation of the battery system.

[0071] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and all such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A limiting device for a battery system BMU, characterized in that, include: The limiting member (1) is provided with a liquid cooling plate connection structure for connecting with the liquid cooling plate (100). The limiting member (1) includes a first clamping plate (11) and a second clamping plate (12). The first clamping plate (11) and the second clamping plate (12) are arranged at an angle to form a clamping space (2) between them. An insert (3) is provided on the battery management unit (200), at least a portion of which is inserted into the clamping space (2) and abuts against the first clamping plate (11) and the second clamping plate (12).

2. The limiting device for the battery system BMU according to claim 1, characterized in that, The insert (3) includes an insert segment (31) having a first end and a second end opposite to each other. The first end of the insert segment (31) faces the limiting member (1), and the thickness of the insert segment (31) is gradually reduced in the direction from the second end to the first end.

3. The limiting device for the battery system BMU according to claim 2, characterized in that, The insert (3) further includes a connecting segment (32) for connecting to the battery management unit (200), and the connecting segment (32) is connected to the second end of the insert segment (31), the thickness of the connecting segment (32) being greater than or equal to the thickness of the second end of the insert segment (31).

4. The limiting device for the battery system BMU according to claim 1, characterized in that, The limiting member (1) includes a plurality of first clamping plates (11) and a plurality of second clamping plates (12) spaced apart along a first direction (X), with the first clamping plates (11) and the second clamping plates (12) being alternately arranged.

5. The limiting device for the battery system BMU according to claim 4, characterized in that, The liquid cooling plate connection structure is configured as a connecting plate (4), and a plurality of first clamping plates (11) and a plurality of second clamping plates (12) are disposed on the connecting plate (4).

6. The limiting device for the battery system BMU according to claim 5, characterized in that, The first clamping plate (11) is perpendicular to the connecting plate (4).

7. The limiting device for the battery system BMU according to claim 5, characterized in that, The connecting plate (4) is provided with mounting holes (5), and fasteners are inserted through the mounting holes (5). The fasteners are used to connect the connecting plate (4) to the liquid cooling plate (100).

8. The limiting device for the battery system BMU according to any one of claims 1-7, characterized in that, The limiting member (1) is a sheet metal part formed in one piece, and the first clamping plate (11) and the second clamping plate (12) are formed by cutting and bending the sheet metal part.

9. The limiting device for the battery system BMU according to any one of claims 1-7, characterized in that, The angle of the clamping space (2) formed between the first clamping plate (11) and the second clamping plate (12) is less than 90°.

10. A battery system, characterized in that, include: Liquid cooling plate (100); Battery management unit (200); The limiting device of the battery system BMU according to any one of claims 1-9, wherein the limiting member (1) is connected to the liquid cooling plate (100) and the insert (3) is connected to the battery management unit (200).

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