Anti-loosening assembly of battery pack end plate

Abstract

The utility model belongs to the technical field of power batteries, and particularly relates to an anti-loosening assembly of a battery pack end plate. Comprising a mounting beam, connecting pieces and end plates, and the end plates are fixedly connected with the mounting beam through the connecting pieces; an anti-loosening fastener is detachably mounted on the end plate, an anti-loosening groove is formed in the anti-loosening fastener, and one end of the connecting piece is located in the anti-loosening groove and matched with the anti-loosening groove in shape; a pole piece fixing terminal is fixedly mounted on the anti-loosening fastener; the installation stability of the end plate is improved; and meanwhile, the anti-loosening fasteners are detachably connected with the end plates, so that the end plates can be conveniently disassembled in the later period, and the battery pack can be conveniently maintained and protected.

Description

Technical Field

[0001] This utility model belongs to the field of power battery technology, and specifically relates to an anti-loosening component for a battery pack end plate. Background Technology

[0002] In a power battery pack, there are usually several cell modules. These cell modules typically consist of end plates, side plates (or packing straps), and cells. The end plates are then bolted to the mounting beams of the battery pack housing. When the battery pack is installed on a vehicle, the bolts at the end plate mounting positions are at risk of loosening due to vibration. This can reduce the reliability of the battery pack, leading to performance degradation or even fire failure. To prevent bolt loosening, thread-locking adhesive is usually applied during installation. However, this method significantly reduces performance if the bolts are removed and reinstalled, and it also leaves adhesive residue in the rivet nut holes. Therefore, a reliable and stable solution to prevent end plate bolt loosening, while also facilitating repeated disassembly and reassembly for later maintenance, is a pressing issue that needs to be addressed. Utility Model Content

[0003] To address the aforementioned issues, this utility model proposes an anti-loosening component for a battery pack end plate, comprising a mounting beam, a connector, and an end plate. The end plate is fixedly connected to the mounting beam via the connector. An anti-loosening fastener is detachably mounted on the end plate, and an anti-loosening groove is provided on the anti-loosening fastener. One end of the connector is located within the anti-loosening groove and matches the shape of the anti-loosening groove.

[0004] The anti-loosening fastener is fixedly installed with a pole plate fixing terminal.

[0005] Furthermore, a set of limiting grooves is provided on the top of the end plate;

[0006] The anti-loosening fastener includes a limiting body, an anti-loosening groove is formed on the side of the limiting body opposite to the connecting part, and limiting buckles are slidably installed at both ends of the limiting body, with one end of the limiting buckle engaging with the limiting groove.

[0007] Furthermore, the anti-loosening fastener also includes a first rotating shaft and a second rotating shaft;

[0008] The first and second rotating shafts both pass through the limiting body and are fixedly connected to the limiting buckle; the limiting buckle is rotatably connected to the limiting body through the first rotating shaft;

[0009] The limiting body has an oblong hole at the position of the second rotating shaft, and the oblong hole is set along the trajectory of one end of the limiting buckle away from the limiting groove; the limiting buckle is slidably connected to the limiting body through the second rotating shaft;

[0010] A telescopic component is installed between the two sets of limiting buckles, and the second rotating shaft is rotatably connected to the telescopic component.

[0011] Furthermore, the telescopic assembly includes a telescopic shaft and a telescopic bushing, which are respectively fixedly connected to the limiting buckles at both ends; two sets of second rotating shafts respectively pass through one end of the telescopic bushing and the telescopic shaft; the telescopic shaft and the telescopic bushing pass through the limiting body, and a spring is provided between the telescopic shaft and the telescopic bushing.

[0012] Furthermore, a first dovetail groove is formed on the side of the limiting body opposite to the electrode fixing terminal, and a second dovetail groove is formed on the electrode fixing terminal, with the first dovetail groove matching the second dovetail groove.

[0013] Furthermore, the end of the limiting buckle furthest from the limiting groove is arc-shaped.

[0014] Furthermore, the telescopic shaft body has a stepped optical axis at one end facing the telescopic bushing, and the telescopic bushing has a countersunk hole that matches the stepped optical axis; the spring is sleeved on the stepped optical axis.

[0015] Furthermore, both ends of the limiting body are provided with limiting buckles.

[0016] Furthermore, the electrode fixing terminal includes a terminal body and a fixing nut; the second dovetail groove is formed on the terminal body; the fixing nut is installed on the terminal body to fix the lead-out electrode.

[0017] Furthermore, the terminal body is made of non-metallic material.

[0018] Beneficial effects

[0019] The advantages of this utility model over the prior art are as follows:

[0020] 1. This application improves the installation stability of the end plate by setting anti-loosening fasteners on the end plate. While fixing the lead-out electrode plate to the fixed terminal, the anti-loosening fasteners also fix the connector through the anti-loosening grooves. At the same time, the anti-loosening fasteners are detachably connected to the end plate, which facilitates the disassembly of the end plate in the future and is beneficial to the maintenance and protection of the battery pack.

[0021] 2. This application adopts a modular design, and the anti-loosening buckle can not only be used to prevent the end plate bolts from loosening, but also to be used in any position of the bolts in the battery pack that needs to be prevented from loosening, which has strong versatility.

[0022] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the structures pointed out in the description and the accompanying drawings. 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 An axonometric view of the overall structure in an embodiment of this utility model is shown.

[0025] Figure 2 An exploded view of the overall structure in an embodiment of this utility model is shown.

[0026] Figure 3 A cross-sectional schematic diagram of the overall structure in an embodiment of this utility model is shown.

[0027] Figure 4 A partially enlarged view of the anti-loosening fastener and the limiting groove in an embodiment of this utility model is shown.

[0028] Figure 5 A side view of the anti-loosening fastener in an embodiment of this utility model is shown.

[0029] Figure 6 An explosion diagram of the anti-loosening fastener in an embodiment of this utility model is shown.

[0030] Figure 7 The diagram shows a bottom-view axial side view of the anti-loosening fastener in an embodiment of this utility model.

[0031] Figure 8 The front view of the anti-loosening fastener in an embodiment of this utility model is shown.

[0032] Figure 9 A top view of the end plate in an embodiment of this utility model is shown.

[0033] In the diagram, 1. Mounting beam; 2. End plate; 3. Connecting parts;

[0034] 4. Anti-loosening fastener; 401. Limiting body; 402. First rotating shaft; 403. Second rotating shaft; 404. Limiting buckle; 405. Telescopic shaft body; 406. Telescopic bushing; 407. Spring;

[0035] 5. Electrode fixing terminal; 501. Terminal body; 502. Fixing nut. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, 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, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0037] This application provides an anti-loosening component for a battery pack end plate, with reference to... Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 7 The assembly includes a mounting beam 1, a connector 3, and an end plate 2. The end plate 2 is fixedly connected to the mounting beam 1 via the connector 3. An anti-loosening fastener 4 is detachably installed on the end plate 2. The anti-loosening fastener 4 has an anti-loosening groove. One end of the connector 3 is located in the anti-loosening groove and matches the shape of the anti-loosening groove.

[0038] The anti-loosening fastener 4 is fixedly installed with a pole plate fixing terminal 5.

[0039] The mounting beam 1 is a part of the battery pack housing and is mainly used for the installation and fixing of the cell modules. It is usually formed by fixing several cells into a cell module using two symmetrical end plates 2 and side plates. The end plate 2 is also part of the cell module. The connector 3 uses bolts, which pass through the end plate 2 and fix the end plate 2 to the mounting beam 1. The anti-loosening fastener 4 is fixed to the top of the end plate 2. The anti-loosening groove at the bottom of the anti-loosening fastener 4 matches the shape of the top of the bolt. The anti-loosening groove is used to prevent the bolt from loosening. The anti-loosening groove is a regular hexagonal groove. At the same time, the electrode fixing terminal 5 is installed on the top of the anti-loosening fastener 4. The electrode fixing terminal 5 is used to fix the lead-out electrode.

[0040] This application provides an anti-loosening fastener 4 on the end plate 2. While the anti-loosening fastener 4 fixes the lead-out electrode to the fixed electrode terminal 5, it also fixes the connector 3 through the anti-loosening groove, thereby improving the installation stability of the end plate 2. At the same time, the anti-loosening fastener 4 is detachably connected to the end plate 2, which facilitates the disassembly of the end plate 2 in the future and is beneficial for the maintenance and protection of the battery pack.

[0041] In one embodiment of this utility model, reference is made to... Figure 9 and Figure 5 The top of the end plate 2 is provided with a set of limiting grooves;

[0042] The anti-loosening fastener 4 includes a limiting body 401, an anti-loosening groove is formed on the side of the limiting body 401 opposite to the connecting member 3, and limiting buckles 404 are slidably installed at both ends of the limiting body 401, with one end of the limiting buckle 404 engaging with the limiting groove.

[0043] The limiting groove consists of four rectangular grooves evenly distributed around the bolt installation position. A stepped groove is formed on the inner side of the bottom of the rectangular groove facing the bolt. The bottom of the limiting buckle 404 has a trapezoidal step, so that the shape of the trapezoidal step matches the shape of the stepped groove.

[0044] When installing the anti-loosening fastener 4, the limiting buckle 404 is moved on the limiting body 401 so that the position of the limiting buckle 404 corresponds to the position of the limiting groove entry part. After the limiting buckle 404 is placed into the limiting groove, the limiting body 401 is moved again so that the trapezoidal step part of the limiting body 401 enters the step groove of the limiting groove and engages, thereby achieving the fixed installation of the anti-loosening fastener 4 and the end plate 2.

[0045] When disassembling the anti-loosening fastener 4, first move the limiting buckle 404 so that the limiting buckle 404 disengages from the stepped groove of the limiting groove. Then move the limiting body 401 upward, causing the anti-loosening fastener 4 to move upward as a whole, so that the limiting buckle 404 disengages from the limiting groove, thereby disassembling the anti-loosening fastener 4, and then the bolt can be disassembled.

[0046] In one embodiment of this utility model, reference is made to... Figure 5 and Figure 6 The anti-loosening fastener 4 also includes a first rotating shaft 402 and a second rotating shaft 403;

[0047] The first rotating shaft 402 and the second rotating shaft 403 both pass through the limiting body 401 and are fixedly connected to the limiting buckle 404 in sequence; the limiting buckle 404 is rotatably connected to the limiting body 401 through the first rotating shaft 402;

[0048] The limiting body 401 has an oblong hole at the position of the second rotating shaft 403, and the oblong hole is set along the direction of the limiting buckle 404 away from the limiting groove; the limiting buckle 404 is slidably connected to the limiting body 401 through the second rotating shaft 403.

[0049] A telescopic component is installed between the two sets of limiting buckles 404, and the second rotating shaft 403 is rotatably connected to the telescopic component.

[0050] When installing the anti-loosening fastener 4, first press the upper end of the limiting buckle 404 to retract the telescopic component. The upper end of the limiting buckle 404 drives the second rotating shaft 403 to move along the oblong hole towards the middle of the limiting body 401, thereby causing the lower end of the limiting body 401 to rotate around the first rotating shaft 402 away from the middle of the limiting body 401. Then, place the limiting buckle 404 into the limiting groove. After the limiting buckle 404 reaches the bottom of the limiting groove, release the upper end of the limiting buckle 404. When the telescopic component returns to its initial state, it causes the upper end of the limit buckle 404 and the second rotating shaft 403 to move outward along the waist-shaped hole. Consequently, the lower end of the limit buckle 404 rotates inward around the first rotating shaft 402, and the trapezoidal step portion at the lower end of the limit buckle 404 enters the step groove, thus engaging the limit buckle 404 with the limit groove. This fixes the anti-loosening fastener 4. When it is necessary to disassemble the anti-loosening fastener 4, the steps are reversed, which improves the overall ease of operation.

[0051] In one embodiment of this utility model, reference is made to... Figure 6 The telescopic assembly includes a telescopic shaft 405 and a telescopic bushing 406, which are respectively fixedly connected to the limiting buckles 404 at both ends; two sets of second rotating shafts 403 respectively pass through one end of the telescopic bushing 406 and the telescopic shaft 405; the telescopic shaft 405 and the telescopic bushing 406 pass through the limiting body 401, and a spring 407 is provided between the telescopic shaft 405 and the telescopic bushing 406.

[0052] Through holes are machined at one end of the telescopic bushing 406 and the telescopic shaft 405. The second rotating shaft 403 passes through the through holes and can rotate along the through holes. The limiting buckle 404 is fixedly connected to the second rotating shaft 403. When the limiting buckle 404 is subjected to compressive force, the telescopic bushing 406 and the telescopic shaft 405 are compressed, the spring 407 is compressed, and the anti-loosening fastener 4 is placed into the limiting groove. After the limiting buckle 404 reaches the bottom of the limiting groove, the limiting buckle 404 is released, the spring 407 recovers its elastic potential energy and extends, causing the limiting buckle 404 to automatically spring back to the initial position. Thus, the step at the bottom of the limiting buckle 404 enters the step groove of the limiting groove, thereby fixing the anti-loosening fastener 4.

[0053] When it is necessary to disassemble the anti-loosening fastener 4, press the limiting buckle 404 again, so that the telescopic bushing 406 and the telescopic shaft 405 are squeezed. The spring 407 is compressed and drives the trapezoidal step at the bottom of the limiting buckle 404 to disengage from the step groove in the limiting groove, thereby completing the process of disassembling the anti-loosening fastener.

[0054] In one embodiment of this utility model, reference is made to... Figure 3 , Figure 4 and Figure 8 ，The limiting body 401 has a first dovetail groove on the side opposite to the electrode fixing terminal 5, and the electrode fixing terminal 5 has a second dovetail groove, with the first dovetail groove matching the second dovetail groove.

[0055] By using the first and second dovetail grooves together, the electrode fixing terminal 5 and the limiting body 401 can be easily installed, while ensuring the stability of the installation.

[0056] In one embodiment of this utility model, the end of the limiting buckle 404 away from the limiting groove is arc-shaped.

[0057] By setting the top of the limit buckle 404 to be arc-shaped, the one-piece molding has an arc-shaped feature, which makes it easy for operators to perform pressing operations.

[0058] In one embodiment of this utility model, a plurality of the anti-loosening fasteners 4 are respectively located at both ends of the end plate 2.

[0059] Connectors 3 are provided at both ends of the end plate 2, and anti-loosening fasteners 4 are provided simultaneously to further improve the fixing effect of the end plate 2.

[0060] In one embodiment of this utility model, the telescopic shaft 405 has a stepped optical shaft at one end facing the telescopic bushing 406, and the telescopic bushing 406 has a countersunk hole that mates with the stepped optical shaft; the spring 407 is sleeved on the stepped optical shaft.

[0061] A guide hole is provided on the limiting body 401, and the telescopic shaft 405 and the telescopic bushing 406 are located in the guide hole. The guide hole guides the movement of the telescopic shaft 405 and the telescopic bushing 406. At the same time, the spring 407 is located inside the countersunk hole, which guides the extension and retraction of the spring 407 and improves the stability during operation.

[0062] In one embodiment of this utility model, the electrode fixing terminal 5 includes a terminal body 501 and a fixing nut 502; the second dovetail groove is formed on the terminal body 501; the fixing nut 502 is installed on the terminal body 501 to fix the lead-out electrode.

[0063] After the terminal body 501 is fixed to the limiting body 401 through the second dovetail groove, it is detachably connected to the terminal body 501 through the fixing nut 502. The lead-out electrode is placed on the terminal body 501 and fixed to the terminal body 501 through the fixing nut 502 to fix the lead-out electrode.

[0064] In one embodiment of this utility model, the terminal body 501 is made of non-metallic material.

[0065] By using non-metallic materials for the terminal body 501, it has insulation properties and plays an insulating role.

[0066] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An anti-loosening assembly for a battery pack end plate, characterized in that, It includes a mounting beam (1), a connector (3) and an end plate (2). The end plate (2) is fixedly connected to the mounting beam (1) through the connector (3). The end plate (2) is detachably equipped with an anti-loosening fastener (4). The anti-loosening fastener (4) has an anti-loosening groove. One end of the connector (3) is located in the anti-loosening groove and matches the shape of the anti-loosening groove. The anti-loosening fastener (4) is fixedly installed with a pole plate fixing terminal (5).

2. The anti-loosening assembly for a battery pack end plate according to claim 1, characterized in that, The top of the end plate (2) is provided with a set of limiting grooves; The anti-loosening fastener (4) includes a limiting body (401), an anti-loosening groove is formed on the side of the limiting body (401) opposite to the connecting member (3), and limiting buckles (404) are slidably installed at both ends of the limiting body (401), with one end of the limiting buckle (404) engaging with the limiting groove.

3. The anti-loosening assembly for a battery pack end plate according to claim 1, characterized in that, The anti-loosening fastener (4) also includes a first rotating shaft (402) and a second rotating shaft (403); The first rotating shaft (402) and the second rotating shaft (403) both pass through the limiting body (401) and are fixedly connected to the limiting buckle (404) in sequence; the limiting buckle (404) is rotatably connected to the limiting body (401) through the first rotating shaft (402); The limiting body (401) has an oblong hole at the position of the second rotating shaft (403), and the oblong hole is set along the direction trajectory away from the limiting groove at one end of the limiting buckle (404); the limiting buckle (404) is slidably connected to the limiting body (401) through the second rotating shaft (403); A telescopic assembly is installed between the two sets of limiting buckles (404), and the second rotating shaft (403) is rotatably connected to the telescopic assembly.

4. The anti-loosening assembly for a battery pack end plate according to claim 3, characterized in that, The telescopic assembly includes a telescopic shaft (405) and a telescopic bushing (406), which are fixedly connected to the limiting buckles (404) at both ends respectively; two sets of second rotating shafts (403) pass through one end of the telescopic bushing (406) and the telescopic shaft (405) respectively; the telescopic shaft (405) and the telescopic bushing (406) pass through the limiting body (401), and a spring (407) is provided between the telescopic shaft (405) and the telescopic bushing (406).

5. The anti-loosening assembly for a battery pack end plate according to claim 3, characterized in that, The limiting body (401) has a first dovetail groove on the side opposite to the electrode fixing terminal (5), and the electrode fixing terminal (5) has a second dovetail groove, with the first dovetail groove matching the second dovetail groove.

6. The anti-loosening assembly for a battery pack end plate according to claim 3, characterized in that, The end of the limiting buckle (404) away from the limiting groove is arc-shaped.

7. The anti-loosening assembly for a battery pack end plate according to claim 1, characterized in that, Multiple anti-loosening fasteners (4) are located at both ends of the end plate (2).

8. The anti-loosening assembly for a battery pack end plate according to claim 4, characterized in that, The telescopic shaft (405) has a stepped optical axis at one end facing the telescopic bushing (406), and the telescopic bushing (406) has a countersunk hole that matches the stepped optical axis; the spring (407) is sleeved on the stepped optical axis.

9. The anti-loosening assembly for a battery pack end plate according to claim 5, characterized in that, The electrode fixing terminal (5) includes a terminal body (501) and a fixing nut (502); the second dovetail groove is formed on the terminal body (501); the fixing nut (502) is installed on the terminal body (501) to fix the lead-out electrode.

10. The anti-loosening assembly for a battery pack end plate according to claim 9, characterized in that, The terminal body (501) is made of non-metallic material.

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