CN218648166U

CN218648166U - Sampling assembly and battery module

Info

Publication number: CN218648166U
Application number: CN202223178501.8U
Authority: CN
Inventors: 时博文; 何亚飞
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: 2022-11-29
Filing date: 2022-11-29
Publication date: 2023-03-17
Anticipated expiration: 2032-11-29

Abstract

The utility model relates to a sampling assembly and a battery module, wherein the sampling assembly comprises a flexible circuit board and a conductive connecting piece, the flexible circuit board comprises a main body part and a connecting finger extending from the main body part; the conductive connection includes a first connection portion, and a second connection portion extending at an angle from the first connection portion; wherein the connecting finger is electrically and mechanically connected with the first connecting part of the conductive connecting piece; the sampling assembly can avoid bending of the FPC circuit board.

Description

Sampling assembly and battery module

Technical Field

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

Background

In recent years, the appearance of new energy automobiles plays a great role in promoting social development and environmental protection, and the power battery pack serving as a rechargeable battery is a power source of the new energy automobiles and is widely applied to the field of the new energy automobiles.

In order to ensure the safety of the battery pack in use, a sampling assembly is arranged in a battery module to acquire parameters such as the voltage of a battery in the prior art. The electrode end of the battery module in the prior art is usually on the side end face of the module that sets up, therefore the connection of the FPC circuit board in the sampling subassembly indicates that the module top surface is buckled to the side end face and is connected with the electrode end of battery module, is subject to the material of current FPC circuit board, and FPC circuit board causes the damage of circuit board easily at the in-process of buckling, can lead to scrapping of circuit board, and the circuit of department of buckling also has cracked risk in subsequent use, still has safe risk. In addition, when there is no space inside the battery module for the FPC to be bent, the connection between the FPC board and the electrode terminals may also be very difficult. Therefore, a new sampling assembly is needed to facilitate the electrical connection of the sampling assembly and to ensure the electrical safety of the battery module.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a sampling assembly, this sampling assembly can avoid buckling of FPC circuit board.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a sampling assembly for a battery module, comprising:

a flexible circuit board including a main body portion and connection fingers extending from the main body portion; and

a conductive connection including a first connection portion, and a second connection portion extending at an angle from the first connection portion;

wherein the connection finger is electrically and mechanically connected with the first connection portion of the conductive connection member.

In one embodiment, the number of the connecting fingers is multiple, and each connecting finger is connected with one conductive connecting piece.

In one embodiment, the first and second connection portions are perpendicular.

In one embodiment, at least a portion of the connecting finger is a curved segment, the curved segment being in a curved configuration.

In one embodiment, the curved segment is a curvilinear structure having at least two inflection points.

The utility model also provides a battery module, include:

a housing;

a plurality of cell units stacked into the housing, each cell unit including a set of lugs of opposite polarity;

the sampling subassembly, the sampling subassembly above the sampling subassembly, the sampling subassembly the electrically conductive connecting piece the second connecting portion with correspond polarity the utmost point ear group electrical connection.

In one embodiment, the cell units are strip-shaped assemblies extending along a first direction, the second connecting portion of the conductive connecting member is disposed opposite to the end surface of the cell unit in the first direction, the main body portion of the flexible circuit board and the connecting fingers are both located on the upper surface of the cell unit, and the first connecting portion of the conductive connecting member is located on the upper surface of the cell unit and electrically and mechanically connected with the connecting fingers.

In one embodiment, the pole lug groups of the battery cell unit are located at two ends in the first direction, the connecting fingers are connected to two ends of the main body portion of the sampling assembly in the first direction, and each connecting finger is electrically connected to the corresponding pole lug group through one conductive connecting piece.

In one embodiment, a temperature sensor is further included, and the temperature sensor is electrically connected with the flexible circuit board.

In one embodiment, the temperature sensor is fixedly connected with the main body part of the flexible circuit board and is located on the lower surface of the main body part.

The above technical scheme is adopted in the utility model, the beneficial effect who has is, the utility model provides a sampling subassembly lets flexible circuit board's connection indicate to realize electrical connection with the utmost point ear group of battery module through conductive connecting piece, because conductive connecting piece's first connecting portion and second connecting portion become the angle setting, second connecting portion and utmost point ear group electrical connection, first connecting portion extend to indicate the coplanar to come and be connected and indicate electric and mechanically be connected as to connecting, let the connection indicate need not to buckle the operation, also can not be subject to battery module's assembly space simultaneously, not only make things convenient for the connection indicate and the utmost point ear group between electrical connection, and can also avoid among the prior art because of connecting to indicate the risk that the flexible circuit board that results in buckling damages.

Drawings

Fig. 1 shows a schematic diagram of a sampling assembly in embodiment 1.

Fig. 2 shows a schematic diagram of a flexible circuit board in embodiment 1.

Fig. 3 shows a schematic view of an electrically conductive connector in example 1.

Fig. 4 shows a schematic view of another conductive connection member in embodiment 1.

Fig. 5 shows a schematic view of a battery module in example 2.

Fig. 6 shows a schematic view of a flexible circuit board to which a temperature sensor is fixed in embodiment 2.

Reference numerals: 100. a sampling component; 1. a flexible circuit board; 10. a main body portion; 11. a connecting finger; 12. a curved section; 2. a conductive connection member; 21. a first connection portion; 22. a second connecting portion; 221. a fixing hole; 3. a bus bar; 31. copper bars; 41. a pole ear group; 500. a battery module; 5. a cell unit; 6. a middle end cover; 7. a temperature sensor.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the objects, features and advantages of the invention can be more clearly understood. It should be understood that the embodiments shown in the drawings are not intended as limitations on the scope of the invention, but are merely illustrative of the true spirit of the technical solution of the invention.

In the following description, for the purposes of illustrating various disclosed embodiments, certain specific details are set forth in order to provide a thorough understanding of the various disclosed embodiments. One skilled in the relevant art will recognize, however, that the embodiments may be practiced without one or more of the specific details. In other instances, well-known devices, structures and techniques associated with this application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

Throughout the specification and claims, the word "comprise" and variations thereof, such as "comprises" and "comprising", will be understood to have an open, inclusive meaning, i.e., will be interpreted to mean "including, but not limited to", unless the context requires otherwise.

Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

As used in this specification and the appended claims, the singular forms "a", "an", and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "and/or" unless the context clearly dictates otherwise.

In the following description, for the sake of clarity, the structure and operation of the present invention will be described with the aid of directional terms, but the terms "front", "rear", "left", "right", "outer", "inner", "outer", "inward", "upper", "lower", etc. should be understood as words of convenience and not as words of limitation.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in this application will be understood to be a specific case for those of ordinary skill in the art.

Example 1

The utility model provides a sampling assembly, this sampling assembly are applied to the battery module to a voltage isoparametric for detect the battery module. Referring to fig. 1-4, a sampling assembly 100 includes a flexible circuit board 1 and a conductive connector 2. The flexible circuit board 1 is typically an FPC (flexible printed circuit) circuit board, and includes a main body portion 10 and connection fingers 11 extending from the main body portion 10.

The conductive connector 2 includes a first connection portion 21, and a second connection portion 22 extending at an angle from the first connection portion 21, the connection finger 11 of the flexible circuit board 1 being electrically and mechanically connected with the first connection portion 21 of the conductive connector 2. The conductive connecting member 2 is made of a conductive material, for example, a sheet made of a conductive material such as metal, the conductive connecting member 2 in this embodiment is mainly made of a copper sheet, so that the conductive connecting member 2 has good conductive performance, and the outer surface of the copper sheet can be plated with a nickel layer, which not only can prevent the copper sheet from being oxidized, but also can facilitate the welding connection of the conductive connecting member 2 and the connecting finger 11 of the flexible circuit board 1.

Referring to fig. 1, fig. 1 shows a schematic view of a conductive connection member 2 connected to electrodes of a bus bar 3 of a battery module. The second connecting portion 22 of the conductive connecting member 2 is fixedly connected with the bus bar 3, the tab group 41 of the battery module passes through the gap on the bus bar 3, and the tab group 41 of the battery module is welded and fixed with the copper bar 31 on the bus bar 3 or the second connecting portion 22 of the conductive connecting member 2. If the pole lug group 41 is directly welded and fixed with the second connecting part 22 of the conductive connecting piece 2, the pole lug group 41 can be electrically and mechanically connected with the conductive connecting piece 2 at the same time; if the pole ear group 41 is welded to the copper bar 31, the second connecting portion 22 of the conductive connecting member 2 and the copper bar 31 may be welded or riveted to electrically and mechanically connect the conductive connecting member 2 and the copper bar 31. The second connecting portion 22 of the conductive connecting member 2 may further have a fixing hole 221, and the bus bar 3 may have a fixing post matching with the fixing hole 221, so that the second connecting portion 22 of the conductive connecting member 2 may be fixed to the bus bar 3 in a positioning manner.

The first connection portion 21 of the conductive connection member 2 extends to above the top of the bus bar 3 and is electrically and mechanically connected to the connection finger 11 of the flexible circuit board 1 located above the battery module, thereby electrically connecting the flexible circuit board 1 and the tab set 41. Wherein, the contained angle between first connecting portion 21 and the second connecting portion 22 is preferred 90 degrees, first connecting portion 21 and second connecting portion 22 set up perpendicularly promptly to let second connecting portion 22 vertically fix to busbar 3 on, and first connecting portion 21 then the level extends the setting, the connection of flexible circuit board 1 indicates 11 also can be connected with first connecting portion 21 electricity and machinery with the mode that the level set up, not only make things convenient for the connection between 11 and the first connecting portion 21 of connection to indicate, can also guarantee that connection indicates 11 need not buckle. Because the first connecting portion 21 and the second connecting portion 22 of the conductive connecting member 2 are arranged at an angle, and extend to the upper part of the battery module to be electrically and mechanically connected with the connecting finger 11 of the flexible circuit board 1, the connecting finger 11 can be horizontally arranged together with the main body portion 10, and bending operation is not needed, so that the connecting finger is not limited by the assembly space of the battery module, the electrical connection between the connecting finger and the polar lug group 41 is facilitated, and the risk of damage to the flexible circuit board 1 caused by bending of the connecting finger 11 in the prior art can be avoided.

Referring to fig. 2, in this embodiment, the number of the connecting fingers 11 of the flexible circuit board 1 is multiple, and each connecting finger 11 is connected to one conductive connecting member 2, so that each connecting finger 11 of the flexible circuit board 1 does not need to be bent, and the flexible circuit board 1 is prevented from being damaged due to bending of the connecting finger 11.

Example 2

As shown in fig. 5, the present embodiment provides a battery module 500, which includes a casing, a plurality of cell units 5, and a plurality of cell units 5 stacked in the casing, wherein each cell unit includes a polar lug group 51 with opposite polarities. And a sampling member, which is the sampling member disclosed in embodiment 1, and therefore the corresponding structure and reference numerals of the sampling member in embodiment 1 are incorporated into this embodiment. The second connecting part 22 of the conductive connecting part 2 of the sampling assembly is electrically connected with the polar lug group with corresponding polarity, so that the connecting finger 11 of the flexible circuit board 1 in the battery module is prevented from being damaged due to bending.

In the present embodiment, the cell unit 5 is a strip-shaped component extending along the first direction, and the second connection portion 22 of the conductive connection member 2 is disposed opposite to the end face of the cell unit in the first direction, that is, the end cap 6 is located in fig. 6. The main body portion 10 and the connection fingers 11 of the flexible circuit board 1 are located on the upper surface of the cell unit 5, and the first connection portion 21 of the conductive connection member 2 is located on the upper surface of the cell unit and electrically and mechanically connected with the connection fingers 11). Referring to fig. 1 and 5, since the first connection portion 21 and the second connection portion 22 of the conductive connection member 2 are disposed at a substantially right angle and extend to the upper side of the battery module to be electrically and mechanically connected to the connection finger 11 of the flexible circuit board 1, the connection finger 11 can be disposed horizontally with the main body portion 10, without bending operation, and thus, the conductive connection member is not limited by the assembly space of the battery module, thereby facilitating the electrical connection between the connection finger and the tab group 41, and avoiding the risk of damage to the flexible circuit board 1 caused by bending of the connection finger 11 in the prior art.

In the prior art, the positive and negative electrode tab groups of the cell unit may be disposed on the same side, or disposed on different sides, for example, in fig. 5, the tab groups 51 are disposed at both ends of the cell unit in the first direction, so that the connecting fingers 11 are connected to both ends of the main body 10 of the sampling assembly in the first direction, and each connecting finger is electrically connected to the corresponding tab group through one conductive connecting member 2.

Referring to fig. 6, at least a portion of the connecting finger 11 is preferably a curved segment 12, the curved segment 12 has a curved structure, and the curved segment 12 is preferably a curved structure with at least two inflection points, such as an "S" -like structure shown in fig. 5, but is not limited to the shape of the structure in fig. 5, and may also be a curved structure such as a wavy line, a U-shape, a V-shape, etc. The bending section 12 of the connecting finger 11 enables the connecting finger 11 to have a certain extension function, and can play a role in preventing pulling in the allowable limit, so that the damage of the flexible circuit board 1 caused by the vibration of the battery module and the like is avoided, and the service life of the sampling assembly is further ensured.

Referring to fig. 6, the battery module further includes a temperature sensor 7, and the temperature sensor 7 is electrically connected to the flexible circuit board 1, so that the temperature sensor 7 can monitor the temperature of the battery module, and the safety of the battery module during operation is ensured.

Preferably, the temperature sensor 7 is fixedly connected to the main body portion 10 of the flexible circuit board 1 and is located on the lower surface of the main body portion 10. So set up temperature sensor and can make things convenient for temperature sensor 7 fixed, but also can let attached on the battery module that temperature sensor 7 can be better, the monitoring of carrying out the temperature that can be more accurate.

The preferred embodiments of the present invention have been described in detail, but it should be understood that various changes and modifications of the invention can be made by those skilled in the art after reading the above teaching of the present invention. Such equivalents are intended to fall within the scope of the claims appended hereto.

Claims

1. A sampling subassembly for battery module characterized in that includes:

2. The sampling assembly of claim 1, wherein said plurality of coupling fingers is a plurality, each of said coupling fingers being connected to a respective one of said conductive connectors.

3. The sampling assembly of claim 1, wherein the first and second connection portions are perpendicular.

4. The sampling assembly of claim 1, wherein at least a portion of the coupling finger is a curved segment, the curved segment having a curved configuration.

5. The sampling assembly of claim 4, wherein the curved segment is a curvilinear structure having at least two inflection points.

6. A battery module, comprising:

a housing;

a sampling assembly as claimed in any one of claims 1 to 5, the second connection portion of the conductive connection of the sampling assembly being electrically connected to the set of pole lugs of the corresponding polarity.

7. The battery module of claim 6, wherein the cell unit is a bar-shaped member extending along a first direction, the second connecting portion of the conductive connecting member is opposite to an end surface of the cell unit in the first direction, the main body portion of the flexible circuit board and the connecting fingers are both located on an upper surface of the cell unit, and the first connecting portion of the conductive connecting member is located on the upper surface of the cell unit and electrically and mechanically connected to the connecting fingers.

8. The battery module of claim 7, wherein the tab groups of the cell unit are located at two ends of the first direction, the connecting fingers are connected to the main body portion of the sampling assembly at two ends of the first direction, and each connecting finger is electrically connected to the corresponding tab group through one of the conductive connecting members.

9. The battery module of claim 6, further comprising a temperature sensor electrically connected to the flexible circuit board.

10. The battery module of claim 9, wherein the temperature sensor is fixedly connected to the main body portion of the flexible circuit board and is located on a lower surface of the main body portion.