CN216288836U

CN216288836U - Sampling assembly and battery module with same

Info

Publication number: CN216288836U
Application number: CN202122634852.4U
Authority: CN
Inventors: 宋海阳
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2021-10-29
Filing date: 2021-10-29
Publication date: 2022-04-12
Anticipated expiration: 2031-10-29

Abstract

The utility model provides a sampling assembly and a battery module with the same, wherein the sampling assembly comprises: a bus bar; the base material comprises a connecting part and a base material main body, the connecting part and the base material main body are connected with each other, one end of the connecting part is connected with the bus bar, and one end of the base material main body is used for being connected with the BMS; wherein, the minimum width of the connecting part and the end connected with the bus bar is larger than the maximum width of the substrate main body. The utility model solves the problem of high cost of a design loop of a sampling assembly of a battery in the prior art.

Description

Sampling assembly and battery module with same

Technical Field

The utility model relates to the field of batteries, in particular to a sampling assembly and a battery module with the same.

Background

With the rapid development of electric vehicles, the importance of batteries is becoming more and more important, at present, module sampling in batteries uses wires or FPCs (Flexible Printed Circuit boards) for signal transmission, low-cost sampling schemes are being proposed in the industry through various approaches, and at present, an acquisition scheme of FFCs (Flexible Flat cables) is proposed, that is, an insulating film made of ultra-thin Flat copper wires covered with PET (thermoplastic polyester) or other materials.

A circuit is designed in a liquid medicine etching mode in the circuit inside the FPC, insulation design is carried out after two sides of the circuit are pressed through a PI Film (Polyimide Film), and the FPC is connected with an aluminum bar in a tin soldering nickel sheet mode. The FFC is internally provided with a circuit made of a slender and rectangular copper foil, the welding area of the FFC base material and the aluminum row is very small, and the FFC base material is usually fixed in a nickel sheet transfer mode or an FFC direct welding and gluing fixing mode.

However, for the design scheme of the FPC, the circuit inside the FPC is designed in a chemical etching manner, which causes environmental pollution, and the PI film has high cost and the service length of the FPC is limited. For the design scheme of the FFC, the reliability is poor when the base material body and the aluminum row are welded, dispensing is needed, and the process is increased, so that the cost is increased, the reliability after glue aging needs to be further evaluated, and in addition, the switching process and the cost are increased when the FFC uses nickel sheets for switching.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a sampling assembly and a battery module with the same, so as to solve the problem of high cost of a design loop of the sampling assembly of a battery in the prior art.

To achieve the above object, according to one aspect of the present invention, there is provided a sampling assembly including: a bus bar; the base material comprises a connecting part and a base material main body, the connecting part and the base material main body are connected with each other, one end of the connecting part is connected with the bus bar, and one end of the base material main body is used for being connected with the BMS; wherein, the minimum width of the connecting part and the end connected with the bus bar is larger than the maximum width of the substrate main body.

Furthermore, the connecting part and the substrate main body are both straight strips, and the connecting part and the substrate main body are arranged at a preset included angle

Furthermore, the connecting part and the substrate main body are straight strips, and the width of the connecting part is consistent along the extending direction of the connecting part; the width of the substrate main body is consistent along the extending direction of the substrate main body; wherein, the width of connecting portion is greater than the width of substrate main part.

Further, the width of the connection part is 2 to 5 times the width of the base material main body.

Further, the flow cross section of the connecting part is rectangular; and/or the flow cross-section of the substrate body is rectangular.

Further, the width of the connecting part ranges from 5mm to 15 mm; and/or the length of the superposition of the connecting part and the bus bar ranges from 5mm to 15 mm.

Further, the connecting portion is a rectangular plate, and the width direction of the connecting portion is perpendicular to the current flowing direction of the connecting portion.

Further, the substrate main part is the rectangular plate, and the value range of the width of substrate main part is 1mm to 3 mm.

Further, the base material is L-shaped; and/or the base material and the busbar are multiple, and the busbars are arranged in one-to-one correspondence with the base materials; wherein the minimum spacing distance between two adjacent substrates is 0.5 mm; and/or the sampling assembly further comprises two oppositely disposed insulating films, the substrate being disposed between the two insulating films.

According to another aspect of the utility model, a battery module is provided, which comprises a sampling assembly, wherein the sampling assembly is the above sampling assembly.

By applying the technical scheme, the sampling assembly comprises a bus bar and a base material, wherein the base material comprises a connecting part and a base material main body, the connecting part and the base material main body are connected with each other, one end of the connecting part is connected with the bus bar, and one end of the base material main body is used for being connected with a BMS; wherein, the minimum width of the connecting part and the end connected with the bus bar is larger than the maximum width of the substrate main body. Like this, make the welding area between substrate and the busbar sufficient through the width that increases connecting portion, under the condition that does not adopt the adaptor piece to connect substrate and busbar, also can guarantee the reliability of being connected between substrate and the busbar to the manufacturing cost of sampling subassembly has been reduced.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

FIG. 1 shows an overall structural schematic of an embodiment of a sampling assembly according to the present invention;

FIG. 2 shows a schematic diagram of the structure of a substrate and an insulating film interfit according to an embodiment of the sampling assembly of the present invention;

FIG. 3 shows a schematic view of an arrangement of a substrate according to an embodiment of the sampling assembly of the present invention;

FIG. 4 shows a plan view schematic of the overall structure of an embodiment of a sampling assembly according to the present invention;

FIG. 5 shows a schematic plan view of a substrate and an insulating film interfitting in accordance with an embodiment of the sampling assembly of the present invention; and

FIG. 6 shows a schematic plan view of a substrate mated with a bus bar of an embodiment of a sampling assembly according to the present invention.

Wherein the figures include the following reference numerals:

10. a bus bar; 20. a substrate; 201. a first contact portion; 202. a second contact portion; 21. a connecting portion; 22. a substrate body; 30. an insulating film.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Referring to fig. 1 to 6, the present invention provides a sampling assembly, including: a bus bar 10; a base material 20, wherein the base material 20 comprises a connecting part 21 and a base material main body 22, the connecting part 21 and the base material main body 22 are connected with each other, one end of the connecting part 21 is connected with the bus bar 10, and one end of the base material main body 22 is used for being connected with the BMS; wherein, the minimum width of the connecting portion 21 at the end connected with the bus bar 10 is larger than the maximum width of the base material main body 22.

The sampling assembly comprises a bus bar 10, a base material 20 and a base material 20, wherein the base material 20 comprises a connecting part 21 and a base material main body 22, the connecting part 21 and the base material main body 22 are connected with each other, one end of the connecting part 21 is connected with the bus bar 10, and one end of the base material main body 22 is used for being connected with a BMS; wherein, the minimum width of the connecting portion 21 at the end connected with the bus bar 10 is larger than the maximum width of the base material main body 22. In this way, the width of the connecting part 21 is increased to ensure that the welding area between the base material 20 and the bus bar 10 is sufficient, and the reliability of connection between the base material 20 and the bus bar 10 can be ensured under the condition that the base material 20 and the bus bar 10 are connected without adopting an adapter plate, so that the production cost of the sampling assembly is reduced.

Wherein, the second contact part 202 is electrically connected with the BMS, and specifically, the second contact part 202 may be directly connected with the BMS or may be connected with the BMS by any type of connector.

The specific material of the base material 20 is preferably copper foil, and the specific material of the base material 20 may be a metal conductive material such as pure copper, tin-plated copper, gold-plated copper, and the like.

In the embodiment of the present application, the connecting portion 21 and the substrate main body 22 are both straight bars.

Specifically, the connection portion 21 includes a first contact portion 201, the first contact portion 201 is connected to the busbar 10, and the first contact portion 201 is disposed at one end of the connection portion 21 away from the substrate main body 22; the substrate main body 22 includes a second contact portion 202, and the second contact portion 202 is connected to the BMS and the second contact portion 202 is disposed at an end of the substrate main body 22 away from the connection portion 21. Wherein the width of the first contact portion 201 is greater than the width of the second contact portion 202.

Preferably, the width of the connecting portion 21 is uniform along the extending direction of the connecting portion 21 to ensure the stability of the connection of the base material 20 and the bus bar 10; the width of the substrate main body 22 is uniform along the extending direction of the substrate main body 22; wherein, the width of the connecting part 21 is larger than that of the base material main body 22.

Optionally, the width of the connecting portion 21 is 2 to 5 times the width of the base material main body 22 to ensure the reliability of the connection of the base material 20 and the bus bar 10.

Specifically, the flow cross section of the connection portion 21 is rectangular; and/or the flow cross-section of the substrate body 22 is rectangular.

Preferably, the connection part 21 is a rectangular plate, and the width direction of the connection part 21 is perpendicular to the current flowing direction of the connection part 21.

Specifically, the width of the connecting portion 21 ranges from 5mm to 15 mm; and/or the length of the connecting part 21 overlapped with the bus bar 10 ranges from 5mm to 15 mm. Therefore, the base material 20 and the bus bar 10 have sufficient contact area, the reliability of connection between the base material 20 and the bus bar 10 is ensured, and the base material 20 and the bus bar 10 are directly welded without using glue dispensing and pasting, so that the reliability of connection is improved.

Specifically, the substrate main body 22 is a rectangular plate.

To ensure that the substrate body 22 can be sequentially displaced while reducing the width of the entire sampling assembly, the width of the substrate body 22 preferably ranges from 1mm to 3 mm.

In the embodiment of the present application, the connecting portion 21 and the substrate main body 22 are both straight bars, and the connecting portion 21 and the substrate main body 22 are disposed at a predetermined included angle.

Preferably, the connecting portion 21 and the substrate main body 22 form an included angle of 90 degrees, i.e., the substrate 20 is L-shaped.

In order to ensure good extensibility and stretchability of the base material 20, the thickness of the base material 20 ranges from 0.2mm to 0.8mm, and as shown in fig. 3 and 6, each base material 20 is arranged in a desired arrangement, so that the circuit arrangement of the sampling assembly is simple.

In the embodiment of the present application, the base material 20 and the bus bar 10 are both plural, and the plural bus bars 10 are disposed in one-to-one correspondence with the plural base materials 20; wherein, the minimum spacing distance between two adjacent base materials 20 is 0.5mm, so as to ensure good insulation performance between the base materials 20 and voltage resistance performance between the loops of the base materials 20; and/or the sampling assembly further comprises two oppositely disposed insulating films 30, the substrate 20 being disposed between the two insulating films 30.

Specifically, the plurality of bus bars 10 are provided at intervals along the extending direction of the insulating film 30, the plurality of base material bodies 22 are provided at intervals along the width direction of the insulating film 30, and the plurality of connecting portions 21 are provided at intervals along the extending direction of the insulating film 30.

Along the width direction of the insulating film 30, both sides of the insulating film are provided with a plurality of connecting portions 21, the plurality of connecting portions 21 of both sides are arranged alternately with each other, and the plurality of bus bars 10 are arranged in one-to-one correspondence with the plurality of connecting portions 21.

Alternatively, the insulating film 30 is rectangular; alternatively, the insulating film 30 may have a branched tree shape, and the branches of the insulating film 30 may be provided in one-to-one correspondence with at least parts of the respective connection portions 21.

Preferably, the specific material of the insulating films 30 is PET (thermoplastic polyester film), and the glued side of each insulating film 30 faces the substrate 20. In the process of manufacturing the sampling assembly, firstly, an insulating film 30 is placed on a plane tool, one surface with glue faces upwards, then the base material 20 is placed on the insulating film 30 according to a required arrangement form, after the loop of the base material 20 is arranged, the other layer of insulating film 30 is placed on the base material 20, the surface with the glue faces downwards (faces to the base material 20), then the insulating films 30 on the two sides are hot-pressed through a special hot press, and the insulating films 30 on the two sides are pressed together after the glue is melted through heating.

In conclusion, the application avoids using a PI film and an etching process, avoids environmental pollution and reduces production cost.

The utility model provides a battery module, which comprises a sampling assembly.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A sampling assembly, comprising:

a bus bar (10);

a base material (20), wherein the base material (20) comprises a connecting part (21) and a base material main body (22), the connecting part (21) and the base material main body (22) are connected with each other, one end of the connecting part (21) is connected with the bus bar (10), and one end of the base material main body (22) is used for being connected with the BMS;

wherein the minimum width of one end of the connecting part (21) connected with the bus bar (10) is larger than the maximum width of the base material main body (22).

2. The sampling assembly according to claim 1, characterized in that the connecting portion (21) and the substrate body (22) are both straight strips, and the connecting portion (21) and the substrate body (22) are arranged at a predetermined angle.

3. The sampling assembly according to claim 1, characterized in that the connection portion (21) and the substrate body (22) are both straight strip-shaped, the width of the connection portion (21) being uniform along the extension direction of the connection portion (21); the width of the substrate body (22) is uniform along the extension direction of the substrate body (22); wherein the width of the connecting portion (21) is larger than the width of the base material main body (22).

4. The sampling assembly according to claim 3, characterized in that the width of the connection portion (21) is 2 to 5 times the width of the substrate body (22).

5. The sampling assembly according to claim 1, characterized in that the flow-through section of the connection portion (21) is rectangular; and/or the flow cross-section of the substrate body (22) is rectangular.

6. The sampling assembly according to claim 1, characterized in that the width of the connection portion (21) ranges from 5mm to 15 mm; and/or the length of the connection part (21) overlapped with the bus bar (10) ranges from 5mm to 15 mm.

7. The sampling assembly according to claim 1, characterized in that the connection portion (21) is a rectangular plate, and a width direction of the connection portion (21) is perpendicular to a current flow direction of the connection portion (21).

8. The sampling assembly of claim 1, wherein the substrate body (22) is a rectangular plate, and the width of the substrate body (22) ranges from 1mm to 3 mm.

9. The sampling assembly of claim 1,

the base material (20) is L-shaped; and/or

The base materials (20) and the busbars (10) are multiple, and the busbars (10) are arranged corresponding to the base materials (20) one by one; wherein the minimum spacing distance between two adjacent base materials (20) is 0.5 mm; and/or

The sampling assembly further comprises two oppositely disposed insulating films (30), the substrate (20) being disposed between the two insulating films (30).

10. A battery module comprising a sampling assembly, wherein the sampling assembly is the sampling assembly of any one of claims 1 to 9.