Electrical part fastening connection structure and battery pack integrated cover plate

Abstract

The utility model discloses a kind of electrical fastening connection structure and battery pack integrated cover plate, involve new energy power battery technical field, including support, connecting piece and fixed part, the inside of support is provided with fixed part, the inside of fixed part movably is provided with connecting piece, connecting piece and fixed part are matched by buckle structure, connecting piece is provided with connecting hole, the position of fixed part and connecting piece cooperation is set as thin-walled elastic structure.Fixed part and connecting piece are matched by buckle structure, through the design of buckle protruding point and fixed hole and thin-walled elastic structure, the phenomenon that connecting piece is discharged in integrated cover plate assembly manufacturing process is reduced, so that production flow is more smooth, improve production convenience, and then reduce production cost.

Description

Technical Field

[0001] This utility model relates to the field of new energy power battery technology, and in particular to an electrical component fastening connection structure and a battery pack integrated cover. Background Technology

[0002] As a core component of pure electric vehicles, the performance of the power battery directly determines the vehicle's range, safety, and cost-effectiveness. In the current technological development process, ensuring the reliability and safety of the battery pack within limited space, while simultaneously improving energy density, reducing costs, and guaranteeing the feasibility of the manufacturing process, has become one of the key challenges facing new energy batteries in the automotive field.

[0003] Regarding the connection between the electrode and the copper busbar, existing connection methods present numerous problems that urgently need to be addressed. For example, in the production process, electrical fasteners are placed between the bottom of the electrode and the plastic component for bolt tightening. However, during transfer between different processes, these fasteners frequently come loose. Even after the integrated cover assembly is completed, the gap between the electrode and the plastic component makes it easy for the fasteners to come loose during transportation, leading to material loss. This not only increases production costs but may also affect the assembly progress and quality of the entire battery pack. Furthermore, during the tightening of a single bolt, the fastener can easily dislodge from the plastic component's restraints as it moves up and down, rotating with the bolt and preventing the bolt torque from reaching the target value. Inside the battery pack, the aluminum and copper busbars are connected by bolts. If the bolt torque is insufficient, poor contact will occur at the connection points, leading to temperature increases and even ablation, seriously threatening the safety performance and lifespan of the battery pack. Utility Model Content

[0004] The purpose of this utility model is to provide an electrical component fastening connection structure and a battery pack integrated cover plate to solve the above-mentioned technical problems.

[0005] The technical solution adopted in this utility model is as follows:

[0006] An electrical component fastening connection structure includes a bracket, a connector, and a fixing member. The fixing member is disposed on the inner side of the bracket, and the connector is movably disposed on the inner side of the fixing member. The connector and the fixing member are engaged by a snap-fit ​​structure. The connector has a connection hole, and the fixing member has a thin-walled elastic structure at the position where it engages with the connector.

[0007] Preferably, the buckle structure includes buckle protrusions, the buckle protrusions are provided on the fixing member at positions that cooperate with the connecting member, and the fixing member is provided with fixing holes that cooperate with the buckle protrusions.

[0008] As a further preferred embodiment, the outer wall of the buckle protrusion is inclined.

[0009] As a further preferred embodiment, the connector includes a top plate and claws disposed on both sides of the top plate, and the fixing holes are disposed on the claws.

[0010] As a further preferred embodiment, an angle is provided between the claw and the top plate.

[0011] As a further preferred embodiment, the bracket is provided with a positioning post for positioning the electrode, and there is a gap between the top plate and the electrode.

[0012] As a further preferred embodiment, the connector further includes a nut, the nut is provided at the lower end of the top plate, and the connecting hole penetrates the top plate and communicates with the screw hole on the nut.

[0013] As a further preferred embodiment, the buckle protrusion is generally hemispherical.

[0014] As a further preferred embodiment, the buckle protrusion and the fixing hole are in a clearance fit.

[0015] As a further preferred embodiment, the nut is fixed to the top plate by press-fitting.

[0016] The above technical solution has the following advantages or beneficial effects:

[0017] (1) In this utility model, the fastener and the connector cooperate with each other through a snap-fit ​​structure. Through the design of snap-fit ​​protrusions, fixing holes and thin-walled elastic structure, the phenomenon of connectors coming off during the manufacturing process of integrated cover plate assembly is reduced. In the prior art, the connector may come off during the transfer of different processes, which may not only lead to material loss, but also require extra time to find or replace the connector, affecting production efficiency. In this utility model, such situations are effectively avoided, making the production process smoother, improving production convenience, and thus reducing production costs.

[0018] (2) In this utility model, the design of the snap-fit ​​structure, combined with the downward pressing design of the electrode, can play the role of pressing and limiting the connection, reducing the phenomenon of parts falling off during transportation, reducing material loss costs, and ensuring the integrity of the product from production to delivery.

[0019] (3) In this utility model, the claw in the connector has an included angle with the top plate, and by reasonably setting the length of the claw, it can form an effective anti-rotation wall and cooperate with the inner wall of the fixing part during the bolt tightening process, ensuring that the connector and the nut on it do not rotate with the bolt, and ensuring that the bolt torque meets the standard. This effectively reduces the risk of poor contact between copper busbar and aluminum busbar, thereby improving the stability of electrical connection in the battery pack, ensuring the safety performance of the battery pack, extending the service life of the battery pack, and reducing battery pack failures and safety hazards caused by connection problems. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the electrical component fastening connection structure and electrode assembly in this utility model;

[0021] Figure 2 This is a cross-sectional view of the electrical component fastening connection structure in this utility model;

[0022] Figure 3 This is a structural schematic diagram of the connector in this utility model.

[0023] In the diagram: 1. Bracket; 2. Connector; 3. Fixing element; 4. Thin-walled elastic structure; 5. Snap-on protrusion; 6. Fixing hole; 7. Top plate; 8. Claw; 9. Electrode; 10. Positioning post; 11. Nut. Detailed Implementation

[0024] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 mechanical connection or an electrical 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.

[0027] Figure 1 This is a schematic diagram of the electrical component fastening connection structure and electrode assembly in this utility model; Figure 2 This is a cross-sectional view of the electrical component fastening connection structure in this utility model; Figure 3 This is a structural schematic diagram of the connector in this utility model. Please refer to [link / reference]. Figures 1 to 3 The diagram illustrates a preferred embodiment of an electrical component fastening connection structure, comprising a bracket 1, a connector 2, and a fixing member 3. The fixing member 3 is disposed on the inner side of the bracket 1, and the connector 2 is movably disposed on the inner side of the fixing member 3. The connector 2 and the fixing member 3 are engaged by a snap-fit ​​structure. The connector 2 has a connection hole, and the fixing member 3 has a thin-walled elastic structure 4 at the position where it mates with the connector 2. In this embodiment, the bracket 1 is integrally injection molded, serving as the basic support component of the entire connection structure. The fixing member 3 is a plastic part, fixedly disposed inside the bracket 1, and can be disposed on the inner side of the bracket 1 through an injection molding process. It is coaxially arranged with the bracket 1 and used to connect bolts, which electrically connect the electrode plate 9 to the copper busbar. Furthermore, the connector 2 has a certain amount of room to move inside the fixing member 3. When the bolt is installed, the bolt can pull the connector 2 to move inside the fixing member 3, so that the snap-on protrusion 5 of the snap-on structure is disengaged from the fixing hole 6. However, the connector 2 will not completely come out of the fixing member 3, so that the connector 2 can cooperate with the inner wall of the fixing member 3 to limit the connector 2 and prevent the connector 2 from rotating with the bolt.

[0028] The thin-walled elastic structure 4 in this embodiment has a certain elastic deformation capability. When the connector 2 is installed on the fixing member 3, the thin-walled elastic structure 4 can adapt to the slight displacement of the connector 2 to a certain extent, and use its own elastic force to firmly fix the connector 2, further preventing the connector 2 from coming off the fixing member 3. During the manufacturing and transportation of the integrated cover plate assembly, this thin-walled elastic structure 4, combined with the snap-fit ​​structure, effectively reduces the phenomenon of the connector 2 coming off. In this embodiment, the thickness of the thin-walled elastic structure 4 is slightly less than the thickness of the side wall of the fixing member 3, and the thin-walled elastic structure 4 can be a stainless steel sheet or a copper sheet, possessing both a certain degree of elasticity and a certain degree of strength.

[0029] Furthermore, as a preferred embodiment, the snap-fit ​​structure includes snap-fit ​​protrusions 5. The snap-fit ​​protrusions 5 are provided on the fixing member 3 at positions that mate with the connecting member 2, and the connecting member 2 is provided with fixing holes 6 that mate with the snap-fit ​​protrusions 5. In this embodiment, the thin-walled elastic structure 4 and the snap-fit ​​structure are mainly used to prevent parts from detaching during the manufacturing process of the integrated cover plate assembly, reduce the occurrence of parts falling during transportation, and lower material loss costs. When installing the bolts, the snap-fit ​​protrusions 5 fix the holes 6. At this time, in conjunction with the setting of the electrode plate 9 and the length setting of the claw 8 itself, the claw 8 can be restricted to the inside of the fixing member 3, preventing the claw 8 from completely detaching from the fixing member 3. This prevents the connecting member 2 and the nut 11 from rotating with the bolts, ensuring that the bolt torque reaches the target value and reducing the risk of poor contact between the copper and aluminum busbars.

[0030] Furthermore, as a preferred embodiment, the outer wall of the snap-fit ​​protrusion 5 is inclined, which facilitates the installation of the connector 2. The operator can easily align the fixing hole 6 of the connector 2 with the snap-fit ​​protrusion 5 and snap it in. Moreover, the snap-fit ​​protrusion 5 and the fixing hole 6 have a clearance fit, avoiding the problem of the connector 2 being unable to be installed due to dimensional tolerances during the manufacturing process, thus improving the success rate of assembly.

[0031] In other embodiments, the snap-fit ​​protrusion 5 is generally hemispherical, which makes it relatively easy to align the fixing hole 6 of the connector 2 with the snap-fit ​​protrusion 5 and snap it in.

[0032] Furthermore, as a preferred embodiment, the connector 2 includes a top plate 7 and claws 8 disposed on both sides of the top plate 7, with fixing holes 6 disposed on the claws 8. In this embodiment, an angle is provided between the claws 8 and the top plate 7, which can be 90°. Moreover, based on conventional experience, during the tightening process of the bolt, the connector 2 as a whole will move upward by <4mm. Here, the length of the claws 8 is designed to be 6mm to ensure that during the tightening process, the claws 8 leave at least 2mm to engage with the inner wall of the fixing member 3, ensuring that the connector 2 and the nut 11 do not rotate with the bolt.

[0033] Furthermore, as a preferred embodiment, the bracket 1 is internally provided with a positioning post 10 for positioning the electrode 9, and there is a gap between the top plate 7 and the electrode 9. In this embodiment, the electrode 9 is fixed to the bracket 1 by hot riveting. The positioning post 10 can accurately determine the position of the electrode 9 on the bracket 1, ensuring the accuracy and stability of the electrode 9 installation. The gap between the top plate 7 and the electrode 9 avoids potential mutual interference between the electrode 9 and the top plate 7, and provides a buffer space for minor deformation of the electrode 9 during the hot riveting process, ensuring a firm and reliable connection between the electrode 9 and the bracket 1. Secondly, the gap allows the top plate 7 in the connector 2 to have a certain position. When installing the bolts, the bolts will drive the connector 2 along... Figure 2 The electrode moves upward a certain distance in the direction shown and comes into contact with the electrode 9. At this time, the electrode 9 can play a further limiting role.

[0034] Furthermore, as a preferred embodiment, the connector 2 also includes a nut 11. The lower end of the top plate 7 is provided with a nut 11, and the connecting hole passes through the top plate 7 and communicates with the screw hole on the nut 11. In this embodiment, the nut 11 is fixed to the top plate 7 by press riveting, connecting the nut 11 and the top plate 7 as one unit. When rotating the bolt, the nut 11 can be prevented from rotating by the cooperation of the claw 8 and the inner wall of the fixing member 3.

[0035] The integrated cover assembly in this embodiment includes an electrical fastening connection structure. During assembly, the connector 2 can be placed in the fixed position of the fixing member 3. Due to the design of the snap-fit ​​protrusion 5, the operator can easily align the fixing hole 6 on the claw 8 of the connector 2 with the snap-fit ​​protrusion 5 and press it down firmly, so that the connector 2 and the fixing member 3 are tightly connected through the snap-fit ​​structure. The thin-walled elastic structure 4 will generate a certain elastic deformation during this process, which helps the snap-fit ​​protrusion 5 to better fix the connector 2. Then, the electrode 9 is fixed to the bracket 1 by hot riveting, and the positioning post 10 on the bracket 1 is used to accurately position the electrode 9. After the electrode 9 is fixed by hot riveting, it will be pressed on the Z-direction position above the connector 2, which not only further limits the connection of the connector 2. Finally, when connecting the aluminum busbar and the copper busbar in the battery pack, after placing the aluminum busbar and the copper busbar in the appropriate position, the bolt is passed through the connection hole on the top plate 7 of the connector 2 and engaged with the nut 11. The fastening connection of the aluminum busbar and the copper busbar is achieved by tightening the bolt. During the bolt tightening process, the claws 8 of the connector 2 will form an anti-rotation wall with the inner wall of the fixing part 3, effectively preventing the nut 11 from rotating with the bolt, ensuring that the bolt torque reaches the target value, thereby ensuring good contact between the aluminum busbar and the copper busbar connection, and avoiding problems such as temperature rise and burning.

[0036] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fastening connection structure for electrical components, characterized in that, The device includes a bracket, a connector, and a fastener. The fastener is located on the inner side of the bracket, and the connector is movably located on the inner side of the fastener. The connector and the fastener are engaged by a snap-fit ​​structure. The connector has a connection hole, and the fastener has a thin-walled elastic structure at the position where it engages with the connector.

2. The electrical component fastening connection structure as described in claim 1, characterized in that, The buckle structure includes buckle protrusions. The buckle protrusions are provided on the fixing member at positions that cooperate with the connecting member. The connecting member is provided with fixing holes that cooperate with the buckle protrusions.

3. The electrical component fastening connection structure as described in claim 2, characterized in that, The outer wall of the buckle protrusion is inclined.

4. The electrical component fastening connection structure as described in claim 2, characterized in that, The connector includes a top plate and claws on both sides of the top plate, and the fixing holes are provided on the claws.

5. The electrical component fastening connection structure as described in claim 4, characterized in that, An angle is provided between the claw and the top plate.

6. The electrical component fastening connection structure as described in claim 4, characterized in that, The bracket has a positioning post inside for positioning the electrode, and there is a gap between the top plate and the electrode.

7. The electrical component fastening connection structure as described in claim 4, characterized in that, The connector also includes a nut, the lower end of the top plate is provided with the nut, and the connecting hole penetrates the top plate and communicates with the screw hole on the nut; The nut is fixed to the top plate by press-fitting.

8. The electrical component fastening connection structure as described in claim 2, characterized in that, The buckle protrusions are generally hemispherical in shape.

9. The electrical component fastening connection structure as described in claim 2, characterized in that, The buckle protrusion and the fixing hole are in a clearance fit.

10. A battery pack integrated cover, characterized in that, Includes the electrical component fastening connection structure as described in any one of claims 1-9.

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