An electrical connection tab fixing structure and a battery pack

Abstract

The utility model discloses an electric connection piece fixing structure and battery pack, include: end plate, fixed bolster, nut and bolt, fixed bolster installs on the end plate, is equipped with fixed groove on fixed bolster, installs the nut in fixed groove, and the electric connection piece passes through the cooperation of bolt and nut to install fixedly on fixed bolster. The application effectively solves the problem of loosening of the electric connection piece inside the battery pack caused by vibration, realizes reliable positioning through the sliding assembly structure of the fixed bolster and the end plate, and the cooperation of the insert nut and the bolt ensures the stability of the locked electric connection piece, avoids the conductive failure caused by the loosening of the connection interface, thereby improving the electrical safety performance of the battery pack during operation.

Description

Technical Field

[0001] This utility model relates to the field of power battery technology for new energy electric vehicles, and in particular to an electrical connection piece fixing structure and a battery pack. Background Technology

[0002] With the widespread application of new energy electric vehicles, the safety performance of power battery packs is receiving increasing attention. Current technologies have significant flaws in the fixing methods of electrical connection components. Connector bars are prone to wobbling, leading to loosening of electrical connectors and severely impacting the overall electrical safety performance of the battery pack. Traditional fixing methods typically use metal brackets and bolts for direct fixation. This structure not only increases the processing difficulty of the end plates but also makes them prone to loosening under long-term vibration. Furthermore, existing fixing structures often lack effective anti-loosening protection measures. During battery pack operation, electrical connectors may shift due to vibration, leading to poor contact or short circuit risks. Simultaneously, existing fixing structures typically lack quick-assembly and disassembly capabilities, making maintenance and repair inconvenient. These technical deficiencies severely restrict the improvement of the safety and reliability of power battery packs. Summary of the Invention

[0003] In view of this, the present invention provides an electrical connector fixing structure, which has the advantages of improving the fixing stability of the electrical connector and facilitating maintenance and repair.

[0004] To achieve the above objectives, this utility model provides the following technical solution: An electrical connector fixing structure includes: an end plate, a fixing bracket, a nut, and a bolt; the fixing bracket is installed on the end plate, and a fixing groove is provided on the fixing bracket, in which a nut is installed; the electrical connector is fixedly installed on the fixing bracket by the bolt and the nut engaging.

[0005] Preferably, the fixed bracket is provided with a fixed foot on the back side, and the end plate is provided with a mating groove that slides with the fixed foot. The fixed bracket is slidably assembled on the end plate through the fixed foot.

[0006] Preferably, the fixing feet are provided in two sets, and the two sets of fixing feet are symmetrically arranged about the transverse central axis of the fixing bracket.

[0007] Preferably, the fixing foot includes a guide plate and a retaining strip. The guide plate is arranged laterally and extends along the mating direction. The guide plate is inserted into the mating groove. The retaining strip is arranged on the side of the guide plate away from the lateral central axis of the fixing bracket and extends along the opposite direction. A limiting channel is formed between the retaining strip and the back side of the fixing bracket. The groove edge on one side of the mating groove is inserted into the limiting channel.

[0008] Preferably, the end of the card strip is provided with a rounded chamfer.

[0009] Preferably, the fixing groove is formed on the front side of the fixing bracket, and there are two fixing grooves, which are symmetrically arranged about the vertical central axis of the fixing bracket.

[0010] Preferably, the fixing groove is provided with a snap-fit ​​structure, and the nut is an insert nut, which is snap-fitted and fixed in the fixing groove.

[0011] Preferably, the front side of the fixed bracket is provided with multiple reinforcing ribs.

[0012] Preferably, the electrical connector fixing structure further includes a protective cover, which is fixedly installed on the front side of the fixing bracket.

[0013] The present invention also proposes a battery pack including the electrical connection piece fixing structure of any of the above embodiments.

[0014] The beneficial effects of this utility model are as follows: Compared with the prior art, this application effectively solves the problem of loosening of the internal electrical connection piece of the battery pack due to vibration. The sliding assembly structure of the fixed bracket and the end plate achieves reliable positioning. The cooperation of the insert nut and bolt ensures the stability of the electrical connection piece after locking, avoiding conductive failure caused by loose connection interface, thereby improving the electrical safety performance of the battery pack during operation.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] Figure 1 This is an assembly diagram of the fixed bracket and end plate of this utility model; Figure 2 This is an assembly diagram of the electrical connection piece fixing structure (integral) of this utility model; Figure 3 This is a structural schematic diagram of the fixed bracket of this utility model.

[0017] Figure label: 1. End plate; 11. Mating groove; 2. Fixed bracket; 21. Fixed foot; 22. Reinforcing rib; 23. Fixed groove; 211. Guide plate; 212. Locking strip; 213. Limiting channel; 2121. Rounded chamfer; 3. Insert nuts; 4. Bolts; 5. Protective caps; 6. Electrical connector; 61. Connector 1; 62. Connector 2. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0020] The following is for reference. Figures 1 to 3 Describe the electrical connection piece fixing structure in the embodiments of this utility model.

[0021] This application discloses an electrical connector fixing structure, including: an end plate 1, a fixing bracket 2, a nut, and a bolt 4. The fixing bracket 2 is mounted on the end plate 1, and a fixing groove 23 is formed on the fixing bracket 2. A nut is installed in the fixing groove 23. The electrical connector 6 is fixedly mounted on the fixing bracket 2 by the bolt 4 cooperating with the nut. The end plate 1 refers to the internal load-bearing structure of the battery pack, which serves as the mounting base for the fixing bracket 2. The fixing bracket 2 is a plastic injection-molded support component. The fixing groove 23 is a positioning structure provided on the surface of the bracket, used to limit the radial displacement of the nut.

[0022] Specifically, end plate 1 serves as the basic support structure, and fixed bracket 2 is installed on end plate 1. Electrical connection piece 6 comprises two pieces, namely connection piece one 61 and connection piece two 62, which are stacked together. Bolt 4 passes through the threaded holes on connection piece one 61 and connection piece two 62 in sequence and is screwed into the nut. The axial force generated by the threaded pair presses connection piece one 61 and connection piece two 62 tightly against the surface of the bracket.

[0023] Through the above technical solution, this application effectively improves the fixing stability of the electrical connector 6. The insulation properties of the plastic bracket can prevent short circuits between the metal end plate 1 and the connector.

[0024] In some embodiments, for example Figure 3 As shown, the fixed bracket 2 has a fixed foot 21 on its back side, and the end plate 1 has a mating groove 11 that slides with the fixed foot 21. The fixed bracket 2 is slidably assembled onto the end plate 1 via the fixed foot 21. The fixed foot 21 refers to the protruding structure on the back side of the bracket. The mating groove 11 refers to the linear groove formed on the end plate 1.

[0025] Through the above technical solution, this application establishes a slidable mechanical connection between the end plate 1 and the fixed bracket 2, which ensures the stability of the bracket after assembly and allows for linear position adjustment during installation. The frictional resistance generated during sliding assembly can effectively prevent the bracket from shifting under vibration, while the nested structure of the limiting channel 213 and the edge of the end plate 1 forms a double constraint, preventing the bracket from loosening in the non-sliding direction.

[0026] In some embodiments, for example Figure 3 As shown, two sets of fixing feet 21 are provided, and the two sets of fixing feet 21 are symmetrically arranged about the transverse central axis of the fixing bracket 2. The transverse central axis refers to the geometric center line extending along the width direction of the fixing bracket 2, which divides the bracket into two symmetrical upper and lower regions. The symmetrical arrangement means that the two sets of fixing feet 21 are mirror images of each other on both sides of the transverse central axis, and the geometry and installation position of the two sets of fixing feet 21 are completely identical.

[0027] Specifically, during assembly, the two sets of fixing feet 21 are simultaneously embedded into the mating grooves 11 of the end plate 1, forming a bidirectional symmetrical constraint force. When an external load is applied to the electrical connector 6, the symmetrically distributed fixing feet 21 evenly transfer the load to the mating grooves 11 on both sides of the end plate 1, preventing excessive pressure on one side of the groove wall. During installation, the operator does not need to distinguish the direction of the fixing feet 21; they only need to push them in along the transverse central axis to complete the positioning. The contact surfaces of the fixing feet 21 on both sides and the mating grooves 11 always maintain a synchronous sliding state.

[0028] Through the above technical solution, this application achieves a balanced force state for the fixed bracket 2 on the end plate 1, effectively preventing the bracket from loosening or deforming due to stress concentration on one side. The symmetrical structure ensures a uniform distribution of sliding resistance during assembly, avoiding jamming caused by skewness. The mirrored layout of the two sets of fixed feet 21 simplifies mold design and production process, and improves part interchangeability and assembly consistency.

[0029] In some embodiments, for example Figure 3 As shown, the fixing foot 21 includes a guide plate 211 and a retaining strip 212. The guide plate 211 is arranged laterally and extends along the mating direction. The guide plate 211 is inserted into the mating groove 11. The retaining strip 212 is arranged on the side of the guide plate 211 away from the lateral central axis of the fixing bracket 2 and extends in the opposite direction. A limiting channel 213 is formed between the retaining strip 212 and the back side of the fixing bracket 2. The groove edge on one side of the mating groove 11 is inserted into the limiting channel 213.

[0030] The guide plate 211 is a plate-like structure with a linear guiding function, extending parallel to the assembly sliding direction. This structure guides the fixed bracket 2 to slide along a predetermined trajectory, preventing angular displacement during assembly. The retaining strip 212 is a protruding structure extending perpendicular to the guide plate 211. This structure, through the limiting channel 213 formed with the back side of the fixed bracket 2, provides limiting constraints on the edge of the end plate 1, preventing displacement after assembly. The limiting channel 213 is a U-shaped space formed by the retaining strip 212 and the back side of the fixed bracket 2. This structure accommodates the edge of the end plate 1, restricting the degrees of freedom of the fixed bracket 2 through mechanical engagement.

[0031] Specifically, during assembly, the guide plate 211 is first inserted into the mating groove 11 of the end plate 1, and the linear fit between the two ensures that the fixed bracket 2 moves in the predetermined direction. Once assembled, the edge of the end plate 1 is completely embedded in the limiting channel 213 formed by the retaining strip 212 and the back side of the fixed bracket 2. At this point, the sidewall blocking effect of the retaining strip 212 prevents the fixed bracket 2 from moving. In this dual limiting mechanism, the guide plate 211 mainly undertakes axial guidance and radial constraint functions, while the combination structure of the retaining strip 212 and the limiting channel 213 specifically addresses displacement risks; the two work together to form a three-dimensional spatial constraint.

[0032] Compared to existing technologies, traditional fixed feet 21 often employ a single guide groove structure, which can only achieve unidirectional sliding constraint and is prone to displacement under vibration conditions. This solution adds a locking strip structure, which, while maintaining the convenience of sliding assembly, also provides an additional mechanical locking function. Existing anti-detachment structures often use elastic buckles, which pose a risk of material fatigue failure after long-term use, while the rigid locking strip structure of this solution offers higher reliability.

[0033] Through the above technical solution, this application effectively eliminates the displacement and shaking problem after the fixed bracket 2 and the end plate 1 are assembled, ensuring that the fixed position of the electrical connection piece 6 remains stable for a long time and significantly improving the reliability of the electrical connection structure. At the same time, the rigid contact design between the limiting channel 213 and the edge of the plate avoids the problem of constraint force attenuation caused by the aging of elastic materials, extending the service life of the fixed structure.

[0034] In some embodiments, for example Figure 3 As shown, the end of the card strip 212 is provided with a rounded chamfer 2121. The rounded chamfer 2121 refers to the arc-shaped cutting treatment of the edge of the end of the card strip 212, which eliminates sharp corners and forms a smooth transition surface.

[0035] Specifically, when the fixed bracket 2 is assembled with the mating groove 11 of the end plate 1 via the fixed foot 21, the rounded chamfer 2121 at the end of the retaining strip 212 first contacts the edge of the mating groove 11. The rounded chamfer 2121 transforms the original right-angle contact into an arc-shaped contact, so that the lateral resistance experienced by the retaining strip 212 during insertion is decomposed into a guiding force along the insertion direction, thereby avoiding a rigid collision between the retaining strip 212 and the edge of the plate. At the same time, the continuous curved surface formed by the rounded chamfer 2121 allows the retaining strip 212 to slide smoothly along the extension direction of the limiting channel 213 until the edge of the mating groove 11 is completely embedded in the limiting channel 213.

[0036] Through the above technical solution, this application solves the assembly friction problem caused by the sharp end of the card strip 212, making the sliding assembly process between the fixed bracket 2 and the end plate 1 smoother, reducing assembly resistance, and avoiding scratches or debris on the surface of the plastic parts due to friction, thereby improving the assembly efficiency and long-term reliability of the fixed structure.

[0037] In some embodiments, for example Figure 1 As shown, the fixing groove 23 is formed on the front side of the fixing bracket 2. There are two fixing grooves 23, which are symmetrically arranged about the vertical central axis of the fixing bracket 2. The fixing groove 23 is a groove structure used to accommodate the insert nut 3, and its depth matches the height of the insert nut 3 to ensure the stability of the snap-fit. The symmetrical arrangement along the vertical central axis means that the two fixing grooves 23 are mirror images of each other along the vertical centerline.

[0038] Specifically, two identical grooves are machined on the front surface of the fixed bracket 2, and the two grooves are mirror-image distributed with the vertical centerline as the axis of symmetry. Insert nuts 3 are respectively embedded in the two grooves, and bolts 4 pass through the mounting holes of the electrical connector 6 and are screwed onto the corresponding insert nuts 3. Because the two fixing grooves 23 are symmetrically distributed on both sides of the central axis, the clamping force generated when the bolts 4 are tightened is evenly distributed to both sides of the bracket, avoiding tilting of the connector due to unilateral force.

[0039] Through the above technical solution, this application solves the problem of poor contact caused by unilateral force on the electrical connector 6. The clamping force is evenly distributed by the double-point symmetrical fixing, ensuring full contact between the connector and the bracket. The symmetrical layout of the fixing groove 23 allows the operator to complete the synchronous positioning of the two bolts 4 by simply aligning the center line, which significantly improves the assembly efficiency and prevents installation deviation. The design of the fixing groove 23 on the front side makes it easy to directly observe the status of the insert nut 3, avoiding nut misalignment or falling off due to blind spots.

[0040] In some embodiments, for example Figure 1 As shown, a snap-fit ​​structure is provided in the fixing groove 23, and the nut is an insert nut 3, which is snap-fitted and fixed in the fixing groove 23.

[0041] The snap-fit ​​structure refers to a limiting component with elastic claws, which can be integrally molded with the fixing groove 23 using injection molding. The elastic deformation of the claws generates a clamping force on the insert nut 3. The insert nut 3 is a metal threaded component pre-installed in the plastic part. The outer wall of the insert nut 3 is provided with a groove that mates with the claws. The snap-fit ​​structure forms an interference fit with the fixing groove 23, and mechanical interlocking is achieved by utilizing the difference in physical properties between metal and plastic.

[0042] Specifically, when the insert nut 3 is pressed into the fixing groove 23, the elastic claw of the snap-fit ​​structure deforms under radial compression. When the insert nut 3 reaches the predetermined position, the claw rebounds and engages with the groove on the outer wall of the insert nut 3. The elastic restoring force of the claw is converted into a radial constraint force on the insert nut 3, while the limiting protrusion at the end of the claw embeds into the groove of the insert nut 3, forming axial positioning. The engagement between the metal insert nut 3 and the plastic snap-fit ​​structure ensures that the nut will not rotate circumferentially when subjected to the locking torque of the bolt 4, and can resist axial displacement under vibration.

[0043] Through the above technical solution, this application effectively prevents the insert nut 3 from loosening and falling off under long-term vibration conditions, ensuring the electrical connection stability between the electrical connecting piece 6 and the end plate 1. The self-locking characteristic of the snap-fit ​​structure simplifies the assembly process, allowing the nut to be fixed without special welding equipment, while avoiding the risk of damage to the plastic bracket caused by high-temperature processing. The detachable design of the insert nut 3 facilitates maintenance and replacement; when the threads are damaged, quick disassembly and assembly can be achieved by releasing the snap-fit.

[0044] In some embodiments, for example Figure 1 As shown, the front side of the fixed bracket 2 is provided with multiple reinforcing ribs 22. Each reinforcing rib 22 is a raised strip-shaped structure along the surface of the fixed bracket 2, which can be integrally molded with the bracket body using injection molding. Its arrangement direction is orthogonal to the force direction of the fixing groove 23. Each set of multiple reinforcing ribs 22 refers to at least two parallel raised structures, which can be evenly distributed around the periphery of the fixing groove 23 to increase the bracket's bending resistance by increasing the moment of inertia of the cross-section.

[0045] Specifically, the reinforcing rib 22 covers the front surface of the fixed bracket 2. When the bolt 4 applies a tightening force to the insert nut 3, the reinforcing rib 22 can withstand tensile stress and resist bending deformation of the front side of the bracket. The arrangement of multiple reinforcing ribs 22 can disperse local stress to the entire bracket. Under dynamic vibration conditions, the multiple reinforcing ribs 22 absorb energy through elastic deformation, avoiding excessive stress concentration around the fixing groove 23.

[0046] Through the above technical solution, this application effectively prevents plastic deformation of the front side of the bracket during the tightening of bolt 4, ensuring that the insert nut 3 and the fixing groove 23 always maintain precise alignment. Under the periodic vibration environment generated by the operation of the battery pack, the reinforcing rib 22 structure maintains the structural integrity of the bracket, avoids the increase in contact resistance of the electrical connection piece 6 due to bracket deformation, and ensures stable conductive connection between power battery modules.

[0047] In some embodiments, for example Figure 2 As shown, the electrical connector fixing structure also includes a protective cover 5, which is fixedly installed on the front side of the fixing bracket 2. The protective cover 5 is a protective component that covers the outside of the electrical connector fixing structure. Specifically, it can be implemented using an injection-molded plastic shell, with snap-fit ​​or screw fixing structures on its edges. This component completely covers the joint area between the electrical connector 6 and the bolt 4, preventing external foreign objects from contacting the electrical connection part.

[0048] Specifically, the protective cover 5 is rigidly connected to the fixed bracket 2 via clips or screws, covering the joint between the electrical connector 6 and the bolt 4. When the protective cover 5 is closed, its inner wall forms a sealed or semi-sealed space with the front surface of the fixed bracket 2, enclosing the connecting end of the electrical connector 6. The sidewall of the protective cover 5 extends to the edge of the fixed bracket 2, forming continuous contact with the surface of the end plate 1 to prevent lateral foreign objects from intruding. Under vibration or impact conditions, the protective cover 5 disperses external forces through its own structural rigidity, preventing the bolt 4 from shifting due to direct force.

[0049] In some specific embodiments, a positioning post may be provided on the inner side of the protective cover 5 to form an insertion fit with the positioning hole on the fixing bracket 2. An array of heat dissipation holes may be provided on the top of the protective cover 5, with the hole diameter being smaller than a preset foreign object diameter threshold. An elastic sealing strip may be provided on the bottom edge of the protective cover 5 to form a pressing contact with the surface of the end plate 1.

[0050] Compared to existing technologies, current electrical connection structures generally lack external protective devices, leaving the connection points directly exposed to the internal space of the battery pack, making them susceptible to corrosion from metal debris or condensate. This solution adds an independent protective cover 5, creating a directional protective layer for the joint area of ​​the connecting pieces without altering the original assembly relationship of the fixing bracket 2.

[0051] Through the above technical solution, this application can prevent metal foreign objects inside the battery pack from contacting the mating surface of the electrical connector 6, avoiding the risk of short circuits caused by foreign object accumulation. At the same time, it reduces the direct interference of external vibrations on the connection state of the bolts 4, maintaining the long-term stability of the electrical connector fixing structure. The airtight structure of the protective cover 5 can also prevent the condensation of electrolyte vapor on the surface of the connector, reducing the probability of oxidation of the contact surface.

[0052] The present invention also proposes a battery pack including the electrical connector fixing structure described in any of the above embodiments. By setting the electrical connector fixing structure, the problem of loosening of the internal electrical connector 6 due to vibration is effectively solved. Reliable positioning is achieved through the sliding assembly structure of the fixing bracket 2 and the end plate 1. The cooperation between the insert nut 3 and the bolt 4 ensures the stability of the electrical connector 6 after locking, avoiding conductive failure caused by loose connection interface, thereby improving the electrical safety performance of the battery pack during operation.

[0053] The electrical connector fixing structure and other components and operations of the battery pack according to the embodiments of this utility model are known to those skilled in the art and will not be described in detail here.

[0054] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0055] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A fixing structure for an electrical connector, characterized in that, include: End plate, mounting bracket, nuts and bolts; The fixed bracket is installed on the end plate. The fixed bracket has a fixing groove, and a nut is installed in the fixing groove. The electrical connector is fixedly installed on the fixed bracket by means of bolts and nuts.

2. The electrical connector fixing structure according to claim 1, characterized in that, The fixed bracket is provided with a fixed foot on its back side, and the end plate is provided with a mating groove that slides with the fixed foot. The fixed bracket is slidably assembled on the end plate through the fixed foot.

3. The electrical connector fixing structure according to claim 2, characterized in that, The fixing feet are provided in two sets, and the two sets of fixing feet are symmetrically arranged about the transverse central axis of the fixing bracket.

4. The electrical connector fixing structure according to claim 3, characterized in that, The fixing foot includes a guide plate and a retaining strip. The guide plate is arranged laterally and extends along the mating direction. The guide plate is inserted into the mating groove. The retaining strip is arranged on the side of the guide plate away from the lateral central axis of the fixing bracket and extends along the opposite direction. A limiting channel is formed between the retaining strip and the back side of the fixing bracket. The groove edge on one side of the mating groove is inserted into the limiting channel.

5. The electrical connector fixing structure according to claim 4, characterized in that, The end of the card strip is provided with a rounded chamfer.

6. The electrical connector fixing structure according to claim 1, characterized in that, The fixing groove is formed on the front side of the fixing bracket. There are two fixing grooves, which are symmetrically arranged about the vertical central axis of the fixing bracket.

7. The electrical connector fixing structure according to claim 6, characterized in that, The fixing groove is provided with a snap-fit ​​structure, and the nut is an insert nut, which is snap-fitted and fixed in the fixing groove.

8. The electrical connector fixing structure according to claim 6, characterized in that, The front side of the fixed bracket is provided with multiple reinforcing ribs.

9. The electrical connector fixing structure according to claim 1, characterized in that, It also includes a protective cover, which is fixedly installed on the front side of the fixed bracket.

10. A battery pack, characterized in that, The electrical connector fixing structure includes any one of claims 1-9.

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