CN220605151U - Busbar structure and battery assembly - Google Patents

Abstract

The application provides a busbar structure, which comprises a carrier plate. The carrier plate is provided with a first end surface. The first end face is fixed with a circuit board, at least two conductive pieces and at least two shaping components. The circuit board comprises a first part and at least two second parts. The conductive member is disposed at least on one side of the first portion. Each second portion is electrically connected between each conductive member and the first portion. Each second part is bent in a reciprocating way to form at least two grooves, and the openings of the two adjacent grooves are arranged towards opposite directions. Each of the molding assemblies is disposed between the first portion and each of the conductive members. The shaping assembly comprises at least two spacing pieces which are arranged at intervals, and one spacing piece is arranged in a groove in a penetrating way. Each limiting piece is provided with two fixed ends, and the two fixed ends are fixed on the first end face and are arranged on two opposite sides of the second part. The utility model provides a busbar structure can solve the problem of connection inefficacy. The application also provides a battery assembly.

Description

Busbar structure and battery assembly

Technical Field

The application relates to the field of circuit board arrangement, in particular to a busbar structure and a battery assembly.

Background

The battery assembly generally includes a power cell and a buss bar structure electrically connected to the power cell. The busbar structure typically includes a circuit board, conductive members (e.g., aluminum bars), and metal sheets (e.g., nickel sheets). The metal sheet is electrically connected between the circuit board and the conductive member. The pole of the power battery is welded to the conductive member. However, in the above structure, when mechanical abuse (such as vibration and collision) of the battery assembly or thermal expansion of the power battery occurs, the connection between the metal sheet and the circuit board or the conductive member fails.

Disclosure of Invention

In view of this, the present application provides a busbar structure that does benefit to improvement cushioning property and extensibility to solve the problem that junction became invalid in the busbar structure.

The application provides a busbar structure, including the carrier plate, the carrier plate has the first terminal surface of perpendicular to first direction. The first end face is fixedly provided with a circuit board, at least two conductive pieces and at least two shaping assemblies. The circuit board comprises a first part extending along a second direction and at least two second parts extending along a third direction, wherein the first direction, the second direction and the third direction are mutually perpendicular. The conductive member is disposed at least on one side of the first portion along the third direction. Each second portion is electrically connected between each conductive member and the first portion. Each second part is bent back and forth along the first direction to form at least two grooves, and the openings of two adjacent grooves are oppositely arranged. Each shaping assembly is arranged between the first part and each conductive piece in the third direction. The shaping assembly comprises at least two limiting pieces which are arranged at intervals along the third direction. The limiting piece penetrates through one groove along the second direction. Each limiting piece is provided with two fixed ends, the two fixed ends are fixed on the first end face, and the two fixed ends are arranged on two opposite sides of the second portion along the second direction.

In some possible embodiments, at least two of the second portions are respectively fixed to opposite sides of the first portion along the third direction, and the second portions located on opposite sides of the first portion are disposed in a staggered manner.

In some possible embodiments, the setting assembly further comprises two connectors, and the two fixed ends of each of the limiting members are fixed between the two connectors.

In some possible embodiments, the conductive member is provided with a first through hole, and the carrier plate is riveted to the first through hole through a first rivet.

In some possible embodiments, each of the fixing ends of each of the limiting members is provided with a second through hole, and the carrier plate is riveted to the second through hole through a second rivet.

In some possible embodiments, the first portion is provided with a third through hole, and the carrier plate is riveted to the third through hole through a third rivet.

In some possible embodiments, one end of each of the second portions is welded to the corresponding conductive member.

In some possible embodiments, the opposite end of each of the second portions is welded to the first portion.

In some possible embodiments, at least two of the stoppers are arranged equidistantly.

The application also provides a battery assembly comprising a plurality of batteries and the bus bar structure. The carrier plate further comprises a second end face which is arranged back to the first end face. Each battery is located on the second end face and electrically connected with the conductive piece through the carrier plate.

In the application, the second portion is bent to form at least two grooves, and the opening directions of the two adjacent grooves are opposite to each other, so that the second portion forms a wavy buffer structure. Thus, the second portion connecting the conductive member and the first portion can provide a cushioning effect upon mechanical abuse, preventing stress from concentrating at the junction of the conductive member and the first portion and the junction of the first portion and the second portion. Therefore, the bus structure provided by the application can solve the problem of failure of the connecting part.

Drawings

FIG. 1 is a top view of a bus structure according to one embodiment of the present disclosure;

FIG. 2 is a schematic diagram of the bus structure shown in FIG. 1 at A;

FIG. 3 is a schematic diagram of a riveting structure between a carrier and a conductive member in the busbar structure shown in FIG. 1;

FIG. 4 is a top view of a bus structure according to another embodiment of the present disclosure;

fig. 5 is a side view of the bus structure shown in fig. 4 at B.

Description of the main reference signs

Bus structure 100,200 carrier plate 10

First end face 11 and second end face 12

Circuit board 20 with first riveting column 13, connecting part 131 and limiting part 132

Third through hole 211 first portion 21

The second portion 22 groove 221 electrically conducts the first through hole 31 of the piece 30 to shape the assembly 40,40' of the spacing piece 41

Second through hole 411 connecting piece 42

Second rivet 14 in first direction X second direction Y third direction Z

Third rivet post 15

The following detailed description will further illustrate the application in conjunction with the above-described figures.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present.

Example 1:

referring to fig. 1, an embodiment of the present application provides a bus structure 100 for electrically connecting with a battery. The busbar structure 100 includes a carrier plate 10, a circuit board 20, at least two conductive members 30 (four conductive members 30 are shown in the figure), and at least two styling members 40 (four styling members 40 are shown in the figure). Illustratively, the carrier plate 10 may be a plastic piece. The conductive member 30 is used for electrical connection to a battery, and the material of the conductive member 30 may be one of copper or aluminum. For example, the conductive member 30 may be aluminum bar or copper bar. The styling assembly 40 may also be a plastic piece. The material of the plastic member may be, for example, one of Polycarbonate (PC) or acrylonitrile-butadiene-styrene (ABS).

The carrier plate 10 has a first end face 11, the first end face 11 being perpendicular to the first direction X. The circuit board 20, at least two conductive members 30, and at least two molding assemblies 40 are all fixed on the first end surface 11. It will be appreciated that the circuit board 20 includes a wiring layer (not shown) and may also include an insulating cover layer (not shown). The covering layer at least covers part of the circuit layer. The circuit board 20 includes a first portion 21 extending in the second direction Y and at least two second portions 22 (four second portions 22 are shown in the figure) extending in the third direction Z. It is understood that the first portion 21 and each of the second portions 22 are provided with a circuit layer to achieve electrical connection between the first portion 21 and the second portion 22. The first direction X, the second direction Y and the third direction Z are perpendicular to each other.

The conductive member 30 is disposed at least at one side of the first portion 21 in the third direction Z. Each second portion 22 is electrically connected between each conductive member 30 and the first portion 21. Referring to fig. 2, each of the second portions 22 is reciprocally bent in the first direction X to form at least two grooves 221. The openings of two adjacent grooves 221 are disposed opposite to each other along the first direction X, so that the second portion 22 can form a wavy buffer structure. Each of the molding assemblies 40 is disposed between the first portion 21 and each of the conductive members 30 along the third direction Z. The setting assembly 40 includes at least two spacing members 41 (three spacing members 41 are shown) spaced apart along the third direction Z. A limiting member 41 is disposed through a groove 221 along the second direction Y. The stopper 41 serves to define the position of the second portion 22, thereby maintaining the wavy cushioning structure of the second portion 22. Each stopper 41 has two fixed ends (not shown). The two fixed ends are fixed to the first end face 11 and are arranged on opposite sides of the second portion 22 along the second direction Y.

In the present application, the second portion 22 is bent to form at least two grooves 221, and the opening directions of two adjacent grooves 221 are opposite to each other, so that the second portion 22 forms a wavy buffer structure. Thus, the second portion 22 connecting the conductive member 30 and the first portion 21 can provide a cushioning effect upon mechanical abuse, preventing stress from concentrating at the junction of the conductive member 30 and the first portion 21 and the junction of the first portion 21 and the second portion 22. Accordingly, the bus structure 100 provided by the present application can solve the problem of failure of the connection.

In some embodiments, the conductive member 30 is provided with a first through hole 31. The carrier plate 10 is riveted to the first through hole 31 through the first rivet 13. Specifically, referring to fig. 3, the first end surface 11 may be integrally formed with a first rivet 13 extending in the first direction X. The first rivet 13 includes a connecting portion 131 and a limiting portion 132 connected to each other. The connecting portion 131 is connected between the limiting portion 132 and the first end face 11. The connection portion 131 may pass through the first through hole 31. The first through hole 31 may abut against a surface of the conductive element 30 facing away from the carrier 10. In another embodiment, the first rivet 13 may protrude from the first end surface 11 along the first direction X after passing through the carrier 10. The carrier plate 10 is riveted to the conductive member 30, which is beneficial to improving the connection stability between the conductive member 30 and the carrier plate 10.

In some embodiments, referring to fig. 1 and 2, each conductive member 30 may be provided with at least three first through holes 31 (three first through holes 31 are shown in the drawings). The at least three first through holes 31 are not arranged in line. The first through holes 31 which are not arranged in a collinear way are beneficial to further improving the connection stability of the conductive piece 30 and the carrier plate 10.

In some embodiments, referring to fig. 1 and 2, each fixed end of each stopper 41 is provided with a second through hole 411. The carrier plate 10 is riveted to the second through hole 411 through the second rivet 14. The second rivet 14 connects the carrier plate 10 and the second through hole 411 in the same manner as the first rivet 13 connects the carrier plate 10 and the first through hole 31. Therefore, the description is omitted.

In other embodiments, the fixed end of the limiter 41 may be adhered to the first end face 11.

In some embodiments, at least two of the stoppers 41 are equally spaced apart. The spacing arrangement of the limiting members 41 is beneficial to reducing the friction between the limiting members 41 and the second portion 22, so that the cushioning effect of the second portion 22 is better.

In some embodiments, at least two second portions 22 are respectively fixed to opposite sides of the first portion 21 along the third direction Z. The second portions 22 on opposite sides of the first portion 21 are offset from each other. The offset arrangement of the second portions 22 is beneficial to reducing the pulling force of the two second portions 22 on both sides of the first portion 21 in opposite directions in the vibration environment. Thus, the positional arrangement of the second portion 22 further facilitates solving the problem of junction failure within the bus structure 100. In addition, the conductive members 30 are disposed on both sides of the first portion 21, which is beneficial for increasing the capacity of the busbar structure 100 for packaging batteries.

In other embodiments, the conductive member 30 and the second portion 22 may be disposed on the same side of the first portion 21, thereby reducing the volume of the buss bar structure 100 after the battery is assembled.

In some embodiments, one end of each second portion 22 is welded to the first portion 21. That is, the first portion 21 and the second portion 22 are separately processed. When the first portion 21 and the second portion 22 are integrally formed, a circuit layer is generally formed on a square substrate layer, and then the substrate layer except for the first portion 21 and the second portion 22 is cut to form the circuit board 20 of the present application. Therefore, the integral molding of the first portion 21 and the second portion 22 tends to result in low layout utilization of the substrate layer. The above-described problem can be avoided by separately machining the first portion 21 and the second portion 22. Therefore, the second portion 22 is soldered to the first portion 21, so that the waste of processing of the circuit board 20 can be reduced. The second portion 22 may be soldered to the first portion 21 by means of conductive paste or by means of heat pressing, for example. Specifically, pads may be reserved at the welding positions of the first portion 21 and the second portion 22, and welding of the first portion 21 and the second portion 22 may be achieved through welding between the pads.

In further embodiments, the first portion 21 and the second portion 22 may be integrally formed. The integrally formed arrangement facilitates reducing the indirect connection sites of the busbar structure 100, thereby enabling a reduction in the probability of failure at the connection.

In some embodiments, referring to fig. 1, the opposite end of each second portion 22 is welded to a corresponding conductive member 30. For example, the bonding pad may be exposed at an end of the second portion 22 near the conductive member 30, and the bonding pad of the second portion 22 and the conductive member 30 may be bonded by the conductive paste to achieve the bonding of the second portion 22 to the conductive member 30. The connection stability of the second portion 22 and the conductive member 30 can be improved by means of soldering.

In other embodiments, the second portion 22 and the conductive member 30 may be connected by conductive glue.

Also, in other embodiments, the conductive member 30 may be adhered to the carrier plate 10 to improve the assembly convenience of the busbar structure 100.

In some embodiments, the first portion 21 is provided with a third through hole 211. The carrier plate 10 is riveted to the third through hole 211 by the third rivet 15. The third rivet post 15 connects the carrier plate 10 and the third through hole 211 in the same manner as the first rivet post 13 connects the carrier plate 10 and the first through hole 31. Therefore, the description is omitted.

In some embodiments, each first portion 21 may be provided with at least four third through holes 211 (four third through holes 211 are shown in the figures). At least four of the third through holes 211 are not arranged in line. The third through holes 211 which are not arranged in line are beneficial to further improving the connection stability of the circuit board 20 and the carrier board 10.

Example 2:

referring to fig. 4 and 5, an embodiment of the present application provides a bus structure 200. The difference from embodiment 1 is that the styling assembly 40' also includes two connectors 42. The two fixed ends of each limiting member 41 are fixed between the two connecting members 42. The second through hole 411 (see fig. 1) is not provided at the fixed end. Illustratively, the connector 42 and the limiter 41 may be integrally formed. In this embodiment, the shaping assembly 40 may be adhered to the carrier plate 10. At least two limiting members 41 are simultaneously connected through a connecting member 42, so that the rapid assembly of the shaping assembly 40 and the carrier plate 10 is facilitated.

Example 3:

an embodiment of the present application provides a battery assembly (not shown). The battery assembly includes a plurality of batteries (not shown) and a bus bar structure 100 or 200. The carrier plate 10 further comprises a second end face 12 arranged facing away from the first end face 11. Each battery is located on the second end face 12 and electrically connected to the conductive member 30 through the carrier 10. For example, the battery may be welded to the conductive member 30, or may be snap-fastened to the conductive member 30. When the battery is fastened to the conductive member 30, the conductive member 30 may be provided with a fastening hole. For example, at least two batteries may be connected in series to the same conductive member 30.

The above description is only one preferred embodiment of the present application, but is not limited to this embodiment during actual application. Other variations and modifications of the present application, which are apparent to those of ordinary skill in the art, are intended to be within the scope of the present application.

Claims (10)

1. The bus structure comprises a carrier plate, wherein the carrier plate is provided with a first end face perpendicular to a first direction, and is characterized in that a circuit board, at least two conductive pieces and at least two shaping assemblies are fixed on the first end face;

the circuit board comprises a first part extending along a second direction and at least two second parts extending along a third direction, wherein the first direction, the second direction and the third direction are mutually perpendicular, the conductive piece is at least arranged on one side of the first part along the third direction, each second part is electrically connected between each conductive piece and the first part, each second part is bent repeatedly along the first direction to form at least two grooves, and openings of two adjacent grooves are oppositely arranged;

each shaping assembly is arranged between the first part and each conductive part in the third direction, each shaping assembly comprises at least two limiting parts which are arranged at intervals in the third direction, one limiting part penetrates through one groove in the second direction, each limiting part is provided with two fixed ends, the two fixed ends are fixed on the first end face, and the two limiting parts are arranged on two opposite sides of the second part in the second direction.

2. The bus structure as set forth in claim 1, wherein at least two of said second portions are respectively fixed to opposite sides of said first portion in said third direction, said second portions located on opposite sides of said first portion being offset.

3. The bus structure as set forth in claim 1, wherein said molding assembly further comprises two connecting members, two of said fixed ends of each of said stoppers being fixed between two of said connecting members.

4. The bus structure as set forth in claim 1, wherein the conductive member has a first through hole, and the carrier plate is riveted to the first through hole through a first rivet.

5. The bus structure as set forth in claim 1, wherein each of said fixed ends of each of said stoppers is provided with a second through hole, and said carrier plate is riveted to said second through hole by a second rivet.

6. The bus structure as set forth in claim 1, wherein the first portion is provided with a third through hole, and the carrier plate is riveted to the third through hole by a third rivet.

7. The bus structure as set forth in claim 1, wherein one end of each of said second portions is welded to the corresponding conductive member.

8. The bus bar structure of claim 7 wherein the opposite end of each of the second portions is welded to the first portion.

9. The bus bar structure of claim 1 wherein at least two of said stop members are equidistantly spaced.

10. A battery assembly comprising a plurality of batteries, wherein the battery assembly further comprises the busbar structure of any one of claims 1 to 9, the carrier plate further comprises a second end surface facing away from the first end surface, and each of the batteries is located on the second end surface and electrically connected with the conductive member through the carrier plate.