CN214227086U

CN214227086U - Sampling assembly and battery module

Info

Publication number: CN214227086U
Application number: CN202120199294.0U
Authority: CN
Inventors: 白玉龙; 朱圣法
Original assignee: Envision Power Technology Jiangsu Co Ltd; Envision Ruitai Power Technology Shanghai Co Ltd
Current assignee: Envision Power Technology Jiangsu Co Ltd; Envision Ruitai Power Technology Shanghai Co Ltd
Priority date: 2021-01-25
Filing date: 2021-01-25
Publication date: 2021-09-17
Anticipated expiration: 2031-01-25

Abstract

The utility model belongs to the technical field of batteries, and discloses a sampling assembly and a battery module, which comprises two busbars, wherein both busbars are printed circuit boards, and each busbar is welded with at least one copper bar; the low-voltage connectors are two in number, the two low-voltage connectors are fixed on the two busbars respectively, and each low-voltage connector is electrically connected with each copper bar on the busbar where the low-voltage connector is located. The utility model provides a sampling subassembly and battery module, the busbar is printed circuit board, and is with low costs, and the copper bar welding is on the busbar, and joint strength is high, and the reliability is high. In addition, through setting up two low voltage connectors, can avoid connecting the short circuit that the flexible circuit board or the flexible flat cable fracture of two busbars led to, further improve the reliability of sampling subassembly. The battery module adopting the sampling assembly has high reliability, low manufacturing cost and simple assembly.

Description

Sampling assembly and battery module

Technical Field

The utility model relates to a battery technology field especially relates to a sampling subassembly and battery module.

Background

The bus bar of traditional power battery module sampling subassembly is the injection molding mostly, and the copper bar passes through the buckle, the hot rivet post isotructure is connected with the bus bar. When battery module takes place the vibration, buckle, hot riveting post isotructure fracture easily, lead to sampling copper bar and busbar separation, still can cause danger such as utmost point ear tear, battery module short circuit, fire during violent vibration, the reliability is low.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a sampling subassembly and battery module, the reliability is high, and is with low costs.

To achieve this object, in one aspect, the present invention provides a sampling assembly comprising:

the two bus bars are printed circuit boards, and each bus bar is welded with at least one copper bar;

the low-voltage connectors are two and are respectively fixed on the two busbars, and each low-voltage connector is electrically connected with each copper bar on the busbar.

Preferably, the device further comprises sampling lines, wherein at least one sampling line is fixedly arranged on each bus bar, one end of each sampling line is electrically connected with each copper bar on the bus bar where the sampling line is arranged, and the other end of each sampling line is electrically connected with the low-voltage connector on the bus bar where the sampling line is arranged.

Preferably, through grooves are formed in two sides of each copper bar on the bus bar.

Preferably, the bus bar is provided with a plurality of snap-in portions.

Preferably, the low voltage connector is soldered to the busbar.

Preferably, the copper bars at two ends of one of the bus bars are respectively provided with a positive electrode connector and a negative electrode connector.

On the other hand, the utility model provides a battery module, including foretell sampling subassembly.

Preferably, the sampling assembly further comprises a battery cell stacking body, and the pole lugs on two sides of the battery cell stacking body are respectively electrically connected with the copper bars on the two busbars of the sampling assembly.

Preferably, the battery pack further comprises a casing for fixing the sampling assembly and the cell stack.

Preferably, the shell comprises two end plates, wherein the two end plates are respectively provided with an outer low-voltage connector joint, and the outer low-voltage connector joints are electrically connected with the low-voltage connector.

The utility model has the advantages that: the utility model provides a sampling subassembly and battery module, the busbar is printed circuit board, and is with low costs, and the copper bar welding is on the busbar, and joint strength is high, and the reliability is high. In addition, through setting up two low voltage connectors, can avoid connecting the short circuit that the flexible circuit board or the flexible flat cable fracture of two busbars led to, further improve the reliability of sampling subassembly. The battery module adopting the sampling assembly has high reliability, low manufacturing cost and simple assembly.

Drawings

FIG. 1 is a schematic view of a buss bar in a sampling assembly of the present invention;

fig. 2 is a schematic view of another buss bar in a sampling assembly of the present invention;

fig. 3 is an exploded view of the sampling assembly and the stack of cells of the present invention;

fig. 4 is a schematic view of the battery module according to the present invention.

In the figure: 1. a bus bar; 11. copper bars; 111. a positive electrode tab; 112. a negative terminal; 12. a through groove; 13. a clamping part; 2. a low voltage connector; 3. sampling lines; 4. a cell stack body; 5. a housing; 51. a U-shaped bottom shell; 511. a first clamping groove; 52. an upper cover; 521. a second clamping groove; 53. an end plate; 531. an outer positive terminal; 532. an outer negative terminal; 533. an outer low voltage connector fitting.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The utility model provides a sampling subassembly and battery module, the reliability is high, and is with low costs. The present invention is described in detail with reference to the following embodiments.

As shown in fig. 1 to 4, the sampling assembly provided in the present embodiment includes a bus bar 1 and a low-voltage connector 2. The bus bar 1 is a printed circuit board and is used for collecting current, and the cost of the printed circuit board is low; the low-voltage connector 2 is fixed on the busbar 1 and used for collecting electric signals and temperature signals. Specifically, busbar 1 has two, and two busbars 1 are printed circuit board, all welds on every busbar 1 and has at least one copper bar 11, and copper bar 11 is used for with the utmost point ear electric connection of electric core, and copper bar 11 welds on busbar 1, and joint strength is high, and the reliability is high. Further, low voltage connector 2 has two, and two low voltage connector 2 are fixed respectively on two busbar 1, and every low voltage connector 2 and every copper bar 11 electric connection on the busbar 1 rather than the place through setting up two low voltage connector 2, can avoid connecting the short circuit that two busbar 1's flexible circuit board or flexible flat cable fracture lead to, further improve the sampling subassembly reliability.

Preferably, as shown in fig. 1 to 4, at least one sampling line 3 is fixed on each bus bar 1, so as to prevent the sampling line 3 from being damaged, for example, the sampling line 3 may be printed on a printed circuit board. Further, one end of each sampling line 3 is electrically connected with each copper bar 11 on the bus bar 1 where the sampling line is located, and the other end of each sampling line 3 is electrically connected with the low-voltage connector 2 on the bus bar 1 where the sampling line is located, so that the current of the copper bars 11 is collected to the low-voltage connector 2.

In this embodiment, as shown in fig. 1 to 4, a plurality of through slots 12 are provided on the busbar 1, and the through slots 12 are provided on both sides of each copper bar 11, so that the tab can pass through the through slots, so that the tab is electrically connected to the copper bar 11. Further, the bus bar 1 is provided with a plurality of clamping portions 13, so that the bus bar 1 can be conveniently clamped on the battery shell. Furthermore, in order to facilitate the external electrical connection with the battery module, the copper bars 11 at two ends of one of the bus bars 1 are respectively provided with a positive terminal 111 and a negative terminal 112.

Preferably, the low-voltage connector 2 is welded to the bus bar 1, and has high connection strength and high reliability.

As shown in fig. 1 to 4, the battery module provided by the embodiment includes the sampling assembly, and the battery module using the sampling assembly has high reliability, low manufacturing cost and simple assembly.

In this embodiment, as shown in fig. 1 to 4, the battery module further includes a cell stack body 4, and the tabs on the two sides of the cell stack body 4 are electrically connected to the copper bars 11 on the two busbars 1 of the sampling assembly respectively.

In this embodiment, as shown in fig. 1 to 4, the battery module further includes a housing 5 for fixing the sampling assembly and the cell stack 4. The housing 5 includes a U-shaped bottom shell 51 and an upper cover 52, wherein the upper cover 52 is snap-fitted on the top of the U-shaped bottom shell 51. Further, be equipped with first joint groove 511 on the U-shaped drain pan 51, be equipped with second joint groove 521 on the upper cover 52, first joint groove 511 and second joint groove 521 all with the joint portion 13 joint on the busbar 1 for fixed busbar 1 can improve battery module's stability.

In this embodiment, as shown in fig. 1 to 4, the housing 5 further includes two end plates 53, and the two end plates 53 are respectively fixed at two side ends of the U-shaped bottom shell 51, so as to form the housing 5 with the U-shaped bottom shell 51 and the upper cover 52. Illustratively, the end plate 53 may be fixed to the U-shaped bottom case 51 by bolts for easy assembly and disassembly. Further, in order to improve the mounting strength, the end plate 53 may be fixed to the bus bar 1 by a bolt.

It is understood that, in order to facilitate external wiring, the end plate 53 on the same side as the bus bar 1 on which the positive electrode tab 111 and the negative electrode tab 112 are disposed is provided with an outer positive electrode tab 531 and an outer negative electrode tab 532, the outer positive electrode tab 531 is electrically connected to the positive electrode tab 111, and the outer negative electrode tab 532 is electrically connected to the negative electrode tab 112. Further, the two end plates 53 are both provided with an outer low-voltage connector terminal 533, and the outer low-voltage connector terminal 533 is electrically connected to the low-voltage connector 2.

Can see through above-mentioned embodiment, the sampling subassembly and the battery module that this embodiment provided, busbar 1 are printed circuit board, and are with low costs, and copper bar 11 welds on busbar 1, and joint strength is high, and the reliability is high. In addition, through setting up two low voltage connector 2, can avoid connecting the short circuit that two busbar 1's flexible circuit board or flexible flat cable fracture lead to, further improve the reliability of sampling subassembly. The battery module adopting the sampling assembly has high reliability, low manufacturing cost and simple assembly.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A sampling assembly, comprising:

the bus bar comprises two bus bars (1), wherein the two bus bars (1) are printed circuit boards, and each bus bar (1) is welded with at least one copper bar (11);

the low-voltage connector (2), low-voltage connector (2) have two, two low-voltage connector (2) are fixed respectively on two busbar (1), every low-voltage connector (2) and its place every on busbar (1) copper bar (11) equal electric connection.

2. The sampling assembly according to claim 1, wherein each bus bar (1) is fixedly provided with at least one sampling line (3), one end of each sampling line (3) is electrically connected with each copper bar (11) on the bus bar (1) where the sampling line is located, and the other end of each sampling line (3) is electrically connected with the low-voltage connector (2) on the bus bar (1) where the sampling line is located.

3. The sampling assembly according to claim 2, characterized in that each of the copper bars (11) on the busbar (1) is provided with a through slot (12) on both sides.

4. The sampling assembly according to claim 3, characterized in that the busbar (1) is provided with a plurality of snap-in parts (13).

5. The sampling assembly according to claim 4, characterized in that the low-voltage connector (2) is welded to the busbar (1).

6. The sampling assembly according to claim 5, characterized in that the copper bars (11) at both ends of one of the busbars (1) are respectively provided with a positive terminal (111) and a negative terminal (112).

7. A battery module comprising the sampling assembly of any one of claims 1 to 6.

8. The battery module according to claim 7, further comprising a cell stack (4), wherein the tabs on two sides of the cell stack (4) are electrically connected with the copper bars (11) on the two busbars (1) of the sampling assembly respectively.

9. The battery module according to claim 8, further comprising a housing (5), wherein the housing (5) is used for fixing the sampling assembly and the cell stack (4).

10. The battery module according to claim 9, wherein the housing (5) comprises two end plates (53), wherein an outer low voltage connector tab (533) is provided on each of the two end plates (53), and wherein the outer low voltage connector tab (533) is electrically connected to the low voltage connector (2).