Integrated busbar and battery pack structure

Abstract

The utility model discloses an integrated busbar and a battery pack structure, and relates to the technical field of batteries, the integrated busbar comprises a support, a plurality of conductive plates and a circuit board, the support is provided with a force unloading part and a plurality of assembling grooves, and the force unloading part and the plurality of assembling grooves are spaced; the conductive plates are correspondingly mounted in the assembly grooves; and the circuit board is mounted on the bracket and is connected in series with the plurality of conductive plates. According to the scheme, the battery cells and the current-conducting plate in the battery pack structure are heated and expanded, the plurality of battery cells extrude each other, and interaction force is generated between the current-conducting plate and the battery cells connected with the current-conducting plate, so that the current-conducting plate extrudes the groove wall of the assembly groove; and when stress is generated in the bracket, the force unloading part is tightened, so that the effect of releasing the stress is achieved, the problem of fracture or structural strength fatigue caused by relatively large stress generated in the bracket is avoided, and the service life of the integrated busbar is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to an integrated busbar and a battery pack structure. Background Art

[0002] The integrated busbar is a conductive component that connects multiple battery cells and is mainly used in automotive batteries. The integrated busbar includes a bracket, multiple conductive plates installed on the bracket, and a circuit board. The circuit board connects multiple conductive plates. One conductive plate is used to connect to one battery cell, thereby integrating multiple battery cells together.

[0003] However, due to the heat and expansion of the battery cells and the conductive plates, multiple battery cells are squeezed against each other, and an interaction force is generated between the conductive plate and the battery cells connected to it, causing the conductive plate to squeeze the bracket, generating stress inside the bracket, which is prone to fracture or structural strength fatigue problems, affecting the service life of the integrated motherboard and urgently needs to be solved. Utility Model Content

[0004] The main purpose of the utility model is to provide an integrated motherboard, aiming to prolong the service life of the integrated motherboard.

[0005] In order to achieve the above object, the utility model provides an integrated busbar, comprising:

[0006] A bracket, wherein the bracket is provided with a force unloading portion and a plurality of assembly grooves, and the force unloading portion is spaced apart from the plurality of assembly grooves;

[0007] A plurality of conductive plates, each of which is installed in the assembly slots correspondingly; and

[0008] A circuit board is mounted on the bracket and multiple conductive plates are connected in series.

[0009] In some embodiments of the utility model, the force unloading portion is a stress groove, the bracket includes a base and a top cover covering the base, the base is provided with the assembly groove on a side facing the top cover, and the stress groove is provided on a side of the base facing away from the top cover.

[0010] In some embodiments of the present invention, a portion of the base is protruded toward the direction close to the top cover to form an assembly protrusion, and the stress groove is formed on a side of the assembly protrusion facing away from the top cover.

[0011] In some embodiments of the utility model, at least part of the assembly grooves are arranged into two rows in the transverse direction, and the two rows of assembly grooves are aligned one by one in the longitudinal direction. The assembly protrusions include transverse ribs and longitudinal ribs. The transverse ribs are arranged in the transverse interval between the two rows of assembly grooves, and the longitudinal ribs are arranged in the longitudinal interval between the two rows of assembly grooves. The transverse ribs and the back sides of the longitudinal ribs are formed with connected stress grooves.

[0012] In some embodiments of the present invention, at least part of the assembly grooves are edge grooves, and the edge grooves are arranged at the edge of the base. A plurality of assembly protrusions are provided, and a stress groove is formed on a side of each assembly protrusion facing away from the top cover.

[0013] At least part of the assembly protrusions are edge protrusions, and the edge protrusions are correspondingly arranged between two adjacent edge grooves.

[0014] In some embodiments of the present invention, a side of the assembly protrusion facing the top cover is concave to form an insertion groove, and the top cover is correspondingly provided with an insertion protrusion, and the insertion protrusion cooperates with the insertion groove.

[0015] In some embodiments of the present invention, at least part of the conductive plate includes a positive plate portion, a negative plate portion, and a first bent portion, and the first bent portion is connected between the positive plate portion and the negative plate portion.

[0016] In some embodiments of the present invention, the circuit board includes a board body and a plurality of electrical connection protrusions, the electrical connection protrusions include a free end, a fixed end and a second bent portion, the second bent portion is located between the fixed end and the free end, the fixed end is electrically connected to the board body, and the free end is welded to the conductive plate.

[0017] In some embodiments of the present invention, the extension direction of the first bend is perpendicular to the extension direction of the second bend.

[0018] The utility model also proposes a battery pack structure, the battery pack structure includes a plurality of battery cells and the above-mentioned integrated busbar, the integrated busbar includes:

[0019] A bracket, wherein the bracket is provided with a stress groove and a plurality of assembly grooves, and the stress groove is spaced apart from the plurality of assembly grooves;

[0020] A plurality of conductive plates, each of which is installed in the assembly slots correspondingly; and

[0021] A circuit board, the circuit board is mounted on the bracket and multiple conductive plates are connected in series;

[0022] A plurality of the battery cells are respectively connected to the conductive plates.

[0023] Through the above scheme, when the integrated busbar is actually applied to the battery pack structure, the battery cells and the conductive plates in the battery pack structure generate heat and expand, and the multiple battery cells are squeezed, and an interaction force is generated between the conductive plate and the battery cells connected thereto, so that the conductive plate squeezes the groove wall of the assembly groove. Since the bracket is provided with a stress groove spaced from the assembly groove, when the groove wall of the assembly groove is compressed and stress is generated inside the bracket, the stress groove is tightened, thereby achieving the effect of releasing stress, avoiding the problem of breakage or structural strength fatigue caused by large stress generated inside the bracket, and extending the service life of the integrated busbar. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0025] Figure 1 This is a schematic diagram of the structure of an embodiment of the battery pack structure of the utility model;

[0026] Figure 2 This is a structural schematic diagram of an embodiment of the integrated busbar of the utility model;

[0027] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0028] Figure 4 This is an exploded view of an embodiment of a bracket in the utility model;

[0029] Figure 5 for Figure 4 A partial enlarged view of point C in the middle;

[0030] Figure 6 This is an exploded view of an embodiment of the integrated busbar of the utility model;

[0031] Figure 7 for Figure 6 A partial enlarged view of point B in the middle.

[0032] Description of Figure Numbers:

[0033] 100, integrated busbar; 10, bracket; 101, force relief part; 102, assembly groove; 102', edge groove; 11, base; 111, assembly protrusion; 111', edge protrusion; 112, transverse rib; 113, longitudinal rib; 116, plug-in groove; 12, top cover; 121, plug-in protrusion; 20, conductive plate; 21, positive plate; 22, first bent portion; 23, negative plate; 30, circuit board; 31, plate body; 32, electrical connection lug; 321, free end; 322, fixed end; 323, second bent portion; 200, battery cell; 1000, battery pack structure.

[0034] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0037] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0038] See also Figures 1 to 7 The utility model proposes an integrated busbar 100, including a bracket 10, a plurality of conductive plates 20 and a circuit board 30, wherein the bracket 10 is provided with a force unloading portion 101 and a plurality of assembly grooves 102, the force unloading portion 101 is spaced apart from the plurality of assembly grooves 102; the conductive plates 20 are correspondingly installed in the assembly grooves 102; the circuit board 30 is installed on the bracket 10, and the plurality of conductive plates 20 are connected in series.

[0039] The bracket 10 is generally made by the vacuum forming process. The bracket 10 can be set to a disc shape, a frame shape, etc. The conductive plate 20 is used to connect with the battery cell 200. Generally, the conductive plate 20 is made of aluminum bar. The plurality of conductive plates 20 include a positive electrode plate, a plurality of intermediate plates and a negative electrode plate. The positive electrode plate and the negative electrode plate are connected to the ends of the circuit board 30, and the plurality of intermediate plates are connected in series between the positive electrode plate and the negative electrode plate through the circuit board 30. In this way, after the battery cell 200 is installed, the circuit board 30 connects the plurality of battery cells 200 in series to realize the integration of the battery cells 200. The integrated busbar 100 realizes current output and return through the positive electrode plate and the negative electrode plate. The circuit board 30 generally adopts FPC (flexible circuit board 30), which has good flexibility and light weight.

[0040] The above-mentioned unloading portion 101 can be a stress hole or a stress groove. The unloading portion 101 can be tightened to release the stress when the bracket 10 is squeezed by the conductive plate 20 and stress is generated. The unloading portion 101 can be set to an elliptical, rectangular, or other irregular shapes, which is not limited here.

[0041] Through the above scheme, when the integrated busbar 100 of the utility model is actually applied to the battery pack structure 1000, the battery cells 200 and the conductive plate 20 in the battery pack structure 1000 generate heat and expand, and the multiple battery cells 200 are squeezed against each other. Interaction force is generated between the conductive plate 20 and the battery cells 200 connected thereto, so that the conductive plate 20 squeezes the groove wall of the assembly groove 102. Since the bracket 10 is provided with a force relief portion 101 spaced from the assembly groove 102, when the groove wall of the assembly groove 102 is compressed and stress is generated inside the bracket 10, the force relief portion 101 is tightened, thereby achieving the effect of releasing stress, avoiding the problem of fracture or structural strength fatigue caused by large stress generated inside the bracket 10, and extending the service life of the integrated busbar 100.

[0042] In some embodiments of the utility model, the force unloading portion 101 is a stress groove, the bracket 10 includes a base 11 and a top cover 12 covering the base 11, the base 11 is provided with the assembly groove 102 on one side facing the top cover 12, and the base 11 is provided with the stress groove on one side facing away from the top cover 12. In this way, the assembly groove 102 and the stress groove are respectively provided on opposite sides of the chassis, avoiding the problem of a large strength difference between the two sides of the chassis and a strength short board due to both the stress groove and the assembly groove 102 being provided on one side of the chassis, and the structural strength of the two sides of the chassis is evenly distributed.

[0043] Furthermore, in some embodiments of the present invention, a portion of the base 11 is protruded toward the direction close to the top cover 12 to form an assembly protrusion 111, and the stress groove is formed on the side of the assembly protrusion 111 facing away from the top cover 12. In this way, the assembly protrusion 111 can play the role of a reinforcing rib to improve the structural strength, and the assembly protrusion 111 can be used to connect the top cover 12. There are many specific ways to connect the assembly protrusion 111 to the top cover 12. In some embodiments of the present invention, the assembly protrusion 111 is provided with a threaded hole, and the top cover 12 is provided with a through hole in a corresponding position, and the screw connection passes through the through hole and is assembled in the threaded hole.

[0044] In some embodiments of the utility model, the assembly protrusion 111 is concave on one side facing the top cover 12 to form a plug-in groove 116, and the top cover 12 is correspondingly provided with a plug-in protrusion 121, and the plug-in protrusion 121 cooperates with the plug-in groove 116. In this way, during assembly, the plug-in protrusion 121 can be directly aligned and plugged with the plug-in groove 116, which is convenient and quick.

[0045] The specific shape of the stress groove generally needs to be set according to the arrangement of multiple assembly grooves 102. In some embodiments of the present invention, at least part of the assembly grooves 102 are arranged in two rows in the horizontal direction, and the two rows of assembly grooves 102 are aligned one by one in the vertical direction. The assembly protrusion 111 includes a horizontal rib 112 and a longitudinal rib 113. The horizontal rib 112 is arranged in the horizontal interval of the two rows of assembly grooves 102, and the longitudinal rib 113 is arranged in the longitudinal interval of the two rows of assembly grooves 102. The back of the horizontal rib 112 and the back of the longitudinal rib 113 form a connected stress groove. Through this solution, when the groove wall of the assembly groove 102 is pressed by the conductive plate 20 and expands outward, the stress groove on the back of the horizontal rib 112 can release the stress in the longitudinal direction of the chassis, and the stress groove on the back of the longitudinal rib 113 can release the stress in the lateral direction of the chassis, and the stress elimination is comprehensive and effective.

[0046] In other embodiments of the present invention, at least part of the assembly grooves 102 are edge grooves 102', and the edge grooves 102' are arranged at the edge of the base 11. A plurality of assembly protrusions 111 are provided, and each assembly protrusion 111 is formed with the stress groove on one side facing away from the top cover 12; at least part of the assembly protrusions 111 are edge protrusions 111', and the edge protrusions 111' are arranged between two adjacent edge grooves 102'. In this way, when the groove wall of the edge groove 102' is squeezed by the conductive plate 20, the stress of the part of the chassis between the two edge grooves 102' is released by the stress groove, and the part of the chassis on the outer edge of the edge groove 102' is naturally released.

[0047] In some embodiments of the present invention, at least part of the conductive plate 20 includes a positive plate portion 21, a negative plate portion 23, and a first bent portion 22, wherein the first bent portion 22 is connected between the positive plate portion 21 and the negative plate portion 23. In this configuration, when the battery cell 200 heats up and expands, and the conductive plate 20 is pulled by the battery cell 200, the first bent portion 22 at the connection between the positive plate portion 21 and the negative plate portion 23 can be unfolded, thereby preventing the conductive plate 20 or the battery cell 200 from being damaged due to large stress.

[0048] In some embodiments of the present invention, the circuit board 30 includes a board body 31 and a plurality of electrical connection lugs 32, the electrical connection lugs 32 include a free end 321, a fixed end 322 and a second bent portion 323, the second bent portion 323 is located between the fixed end 322 and the free end 321, the fixed end 322 is electrically connected to the board body 31, and the free end 321 is welded to the conductive plate 20. The second bent portion 323 can produce elastic deformation to eliminate stress and avoid structural fracture and circuit breaking.

[0049] In some embodiments of the present invention, the first curved portion 22 is perpendicular to the extending direction of the second curved portion 22. Thus, when the battery cell 200 heats up and expands, the structure formed by the circuit board 30 and the conductive plate 20 can be deformed in two directions to eliminate stress.

[0050] The present invention also provides a battery pack structure 1000, which includes a plurality of battery cells 200 and the integrated busbar 100, wherein the plurality of battery cells 200 are respectively connected to the conductive plate 20. Since the battery pack structure 1000 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0051] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An integrated busbar, characterized in that: include: A bracket, wherein the bracket is provided with a force unloading portion and a plurality of assembly grooves, and the force unloading portion is spaced apart from the plurality of assembly grooves; A plurality of conductive plates, each of which is installed in the assembly slots correspondingly; and A circuit board is mounted on the bracket and multiple conductive plates are connected in series.

2. The integrated busbar according to claim 1, characterized in that: The force unloading portion is a stress groove, the bracket includes a base and a top cover covering the base, the base is provided with the assembly groove on a side facing the top cover, and the base is provided with the stress groove on a side facing away from the top cover.

3. The integrated busbar according to claim 2, characterized in that: A portion of the base is protruded toward the direction close to the top cover to form an assembly protrusion, and the stress groove is formed on a side of the assembly protrusion facing away from the top cover.

4. The integrated busbar according to claim 3, characterized in that: At least part of the assembly grooves are arranged in two rows in the transverse direction, and the two rows of assembly grooves are aligned one by one in the longitudinal direction. The assembly protrusions include transverse ribs and longitudinal ribs. The transverse ribs are arranged in the transverse interval between the two rows of assembly grooves, and the longitudinal ribs are arranged in the longitudinal interval between the two rows of assembly grooves. The transverse ribs and the back sides of the longitudinal ribs are formed with connected stress grooves.

5. The integrated busbar according to claim 3, characterized in that: At least part of the assembly grooves are edge grooves, and the edge grooves are arranged at the edge of the base. A plurality of assembly protrusions are provided, and a stress groove is formed on a side of each assembly protrusion facing away from the top cover; At least part of the assembly protrusions are edge protrusions, and the edge protrusions are correspondingly arranged between two adjacent edge grooves.

6. The integrated busbar according to claim 3, characterized in that: The assembly protrusion is concave on one side facing the top cover to form an inserting groove, and the top cover is correspondingly provided with an inserting protrusion, and the inserting protrusion cooperates with the inserting groove.

7. The integrated busbar according to any one of claims 1 to 6, characterized in that: At least part of the conductive plate includes a positive plate portion, a negative plate portion, and a first bent portion, wherein the first bent portion is connected between the positive plate portion and the negative plate portion.

8. The integrated busbar according to claim 7, characterized in that: The circuit board includes a board body and a plurality of electrical connection lugs, the electrical connection lugs include a free end, a fixed end and a second bent portion, the second bent portion is located between the fixed end and the free end, the fixed end is electrically connected to the board body, and the free end is welded to the conductive plate.

9. The integrated busbar according to claim 8, characterized in that: The first curved portion and the second curved portion extend in directions perpendicular to each other.

10. A battery pack structure, characterized in that: The battery pack structure comprises a plurality of battery cells and an integrated busbar as claimed in any one of claims 1 to 9, and the plurality of battery cells are respectively connected to the conductive plates.

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