CN220652462U

CN220652462U - Connection structure, battery module and lithium battery

Info

Publication number: CN220652462U
Application number: CN202320076737.6U
Authority: CN
Inventors: 刘学文; 赵亮
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2023-01-10
Filing date: 2023-01-10
Publication date: 2024-03-22
Anticipated expiration: 2033-01-10

Abstract

The application discloses connection structure, battery module and lithium cell, wherein, connection structure includes: an acquisition module; the connector is fixed and connected to the acquisition module, and a straight socket is arranged on the connector; and the end part of the connecting strip is in plug-in fit with the connector through the straight socket. This application is through setting up grafting complex connecting strip and connector to replace among the prior art chip collection standard module and FPC connecting strip's welded structure, when guaranteeing chip collection scheme FPC typesetting utilization ratio, simplified production technology, reduced the manufacturing degree of difficulty, on the other hand, grafting complex connector and connecting strip maintainability are good, even in CCS assembly equipment and the transportation process, collection standard module and FPC connecting strip take place the separation because of the atress or pulling, cause the function to be unusual, also can pass through connector and connecting strip fast assembly, thereby avoid the product yield to receive the influence.

Description

Connection structure, battery module and lithium battery

Technical Field

The application relates to the technical field of lithium batteries, in particular to a connecting structure, a battery module and a lithium battery.

Background

The development trend of the current power battery system is that structural parts and electric parts are gradually simplified and reduced, the whole battery pack has higher and higher requirements on volume grouping efficiency and electric quantity, sufficient space cannot be reserved for arrangement of wire harnesses and copper bars in the battery pack, the trend of removing the wire harnesses and copper bars by electric power is more and more obvious, and people pay more attention to the safety problem of the battery pack.

Based on this, the single chip acquisition scheme is gradually focused and mentioned by various manufacturers, and in order to improve the FPC typesetting utilization rate of the acquisition scheme, a standard connection bar and an acquisition module hot-press welding process is generally selected when the scheme is designed.

However, if the chip collection standard module and the FPC connecting strip are welded in advance, in the assembling and transferring process of the CCS assembly, the chip collection standard module and the FPC connecting strip are easy to crack due to stress or pulling, so that abnormal functions are caused, the reject ratio is high, and the cost of reducing the typesetting rate can be basically offset by the reject ratio or scrapping; on the other hand, the standard connecting strip and the acquisition module are welded by hot pressing, the whole process is complex, the manufacturing difficulty is high, the subsequent mass production application is difficult, the reject ratio is high, and meanwhile, the acquisition module is difficult to maintain and replace according to the current welding scheme, so that the maintainability of the product is poor, and the after-sale cost is high.

Disclosure of Invention

In view of the above, it is necessary to provide a connection structure for the above-mentioned problems.

In one aspect of the present application, a connection structure is presented, the connection structure comprising:

an acquisition module;

the connector is fixed and connected to the acquisition module and is provided with a straight socket;

and the end part of the connecting strip is in plug-in fit with the connector through a straight socket.

In some embodiments, the connection strip comprises:

a first connecting bar;

a second connecting bar;

one end of the first connecting strip and one end of the second connecting strip are arranged side by side and are matched with the connector in a plugging mode through the straight socket.

In some embodiments, the connection structure further comprises:

and the reinforcing sheet is fixed at the side-by-side ends of the first connecting strip and the second connecting strip.

In some embodiments, the first connection strip, the second connection strip, and the reinforcement sheet combine to form a golden finger structure that fits into the straight socket and is mated with the connector through the straight socket.

In some embodiments, the straight socket of the connector is provided with an anti-falling buckle, the position of the reinforcing piece corresponding to the anti-falling buckle is provided with a clamping groove, and the anti-falling buckle and the reinforcing piece are matched through clamping grooves in a clamping manner.

In a second aspect of the present application, a battery module is presented, which includes:

the above-described connection structure.

In some embodiments, the battery module further includes:

a plurality of battery cells;

the aluminum bars are provided with a plurality of, and are fixedly connected with the battery cells.

In some embodiments, the collection module, the connector and the connecting strip are all provided with a plurality of, a plurality of aluminum bars, a plurality of collection modules and a plurality of connectors are in one-to-one correspondence and fixedly connected.

In some embodiments, the plurality of connectors are connected in series by a first connection bar and a second connection bar.

In a third aspect of the present application, there is also provided a lithium battery, comprising:

the battery module is provided.

Compared with the prior art, the beneficial effects of this application are:

through setting up grafting complex connecting strip and connector to replace among the prior art chip collection standard module and FPC connecting strip's welded structure, when guaranteeing chip collection scheme FPC typesetting utilization ratio, simplified production technology, reduced the manufacturing degree of difficulty, on the other hand, grafting complex connector and connecting strip maintainability are good, even in CCS assembly equipment and the transportation process, collection standard module and FPC connecting strip take place the separation because of atress or pulling, cause the function abnormality, also can pass through connector and connecting strip fast assembly, thereby avoid the product yield to receive the influence.

Drawings

FIG. 1 is a schematic diagram showing a connection structure in an exemplary embodiment of the present application;

FIG. 2 is a schematic diagram showing an acquisition module according to an exemplary embodiment of the present application;

FIG. 3 is a schematic view showing a connecting strip and a reinforcing sheet in an exemplary embodiment of the present application;

fig. 4 is a schematic diagram showing a connection structure in a battery module according to an exemplary embodiment of the present application.

In the figure: 11. an acquisition module; 111. a standard acquisition module assembly; 112. a collection chip; 113. voltage acquisition nickel plates; 12. a connector; 131. a first connecting bar; 132. a second connecting bar; 14. a reinforcing sheet; 2. aluminium bar.

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. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

In the description of the present application, it should be noted that, directions or positional relationships indicated by terms such as "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc., are based on directions or positional relationships shown in the drawings, are merely for convenience of description of the present application and simplification of the description, and do not indicate or imply that the apparatus or element referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

As described in the background art, the current trend of the power battery system is to simplify and reduce structural components and electrical components gradually, the whole package has higher and higher requirements on volume grouping efficiency and charging capacity, sufficient space cannot be reserved for arrangement of the wire harness and the copper bars in the battery package, the trend of electrical harness removal and copper bar removal is more and more obvious, and people pay more attention to the safety problem of the battery package. Based on this, the single chip acquisition scheme is gradually focused and mentioned by various manufacturers, and in order to improve the FPC typesetting utilization rate of the acquisition scheme, a standard connection bar and an acquisition module hot-press welding process is generally selected when the scheme is designed.

To improve the above-mentioned problems, in one aspect of the application, a connection structure is proposed, referring to fig. 1, which mainly includes an acquisition module 11, a connector 12, a connection bar, and a reinforcing sheet 14.

Specifically, in the exemplary embodiment, referring to fig. 2, the collecting module 11 includes a standard collecting module assembly 111, a collecting chip 112 and a voltage collecting nickel plate 113, and in practical application, the collecting module 11 is usually fixed on the aluminum bar 2 by welding. Further, the connector 12 in the present application is specifically an in-line connector dedicated for FPC/FFC, which is fixed and connected to the acquisition module 11, and the connector 12 is provided with a straight socket for plugging and matching with the connection strip.

Specifically, in the exemplary embodiment, referring to fig. 1 and 3, the connector strips are mated with the connector 12 by a straight socket, the connector strips in this application being specifically FPC/FFC connector strips. Further, corresponding to each collecting module 11 and the connector 12, the connecting strips comprise a first connecting strip 131 and a second connecting strip 132, and one end of the first connecting strip 131 and one end of the second connecting strip 132 are arranged side by side and are in plug-in fit with the connector 12 through a straight socket.

Specifically, in the exemplary embodiment, the reinforcing sheet 14 is a reinforcing patch, which is fixed to the side-by-side ends of the first connecting strip 131 and the second connecting strip 132 by press-fitting, and the three form a golden finger structure (composed of a plurality of golden-yellow conductive contacts, which are gold-plated on the surface and are arranged like fingers, so-called "golden fingers") adapted to the straight socket, and is in plug-fit with the connector 12 through the straight socket. Further, an anti-falling buckle is arranged at the straight socket of the connector 12, a clamping groove is formed in the reinforcing piece 14 corresponding to the anti-falling buckle, and the anti-falling buckle and the reinforcing piece 14 are matched through clamping grooves in a clamping mode. The specific structure of the anti-drop buckle and the clamping groove can refer to the arrangement mode of the cable and the cable interface in the prior art, and the detailed description is omitted here.

Through setting up grafting complex connecting strip and connector 12 to replace among the prior art chip collection standard module and FPC connecting strip's welded structure, when guaranteeing chip collection scheme FPC typesetting utilization ratio, simplified production technology, reduced the manufacturing degree of difficulty, on the other hand, grafting complex connector 12 and connecting strip maintainability is good, even in CCS assembly equipment and the transportation process, collection standard module and FPC connecting strip take place the separation because of atress or pulling, cause the function to be unusual, also can pass through connector 12 and connecting strip fast assembly, thereby avoid the product yield to receive the influence.

In a second aspect of the present application, a battery module is further provided, referring to fig. 4, including the above connection structure, the battery cells and the aluminum bar 2, where the battery cells and the aluminum bar 2 are all provided with a plurality of battery cells, such as a plurality of battery cells in fig. 4 are arranged in groups, and form a 1P12S module, and the aluminum bar 2 is fixed at an end of the battery cells. Further, the battery module comprises a plurality of above connection structures, namely, corresponding to each battery module, the collection module 11, the connector 12 and the connecting strip are all provided with a plurality of connection structures, and further, a plurality of aluminum bars 2, a plurality of collection modules 11 and a plurality of connectors 12 are in one-to-one correspondence and fixedly connected, wherein the aluminum bars 2 and the collection modules 11 are fixed in a welding mode.

Specifically, in the exemplary embodiment, taking a single connection structure as an example, the connection strip includes a first connection strip 131 and a second connection strip 132, the first connection strip 131 and the second connection strip 132 are inserted into the connector 12, one end of the first connection strip 131 far away from the connector 12 is arranged side by side with one end of the other adjacent first connection strip 131 or one end of the other adjacent second connection strip 132, and are inserted into the other adjacent connector 12, so that, corresponding to the whole battery module, the plurality of connectors 12 are connected in series through the first connection strip 131 and the second connection strip 132.

Compared with the welding process of the chip acquisition standard module and the FPC connecting strip in the prior art, the welding process is applied to the battery module, the acquisition circuit part (namely the connecting strip) and the acquisition module 11 can be plugged and disconnected, when the acquisition module 11 breaks down, the acquisition module 11 can be replaced, the maintainability is good, and the after-sale cost is low. On the other hand, the collection module 11 and the aluminum bar 2 can be integrated independently, the mounting procedure of the collection circuit part (namely the connecting strip) and the reinforcing sheet 14 can be carried out independently, and finally, the assembly is carried out in a plugging manner, and the procedures can be carried out in parallel without mutual influence, so that the production efficiency is improved, and the processing cost is reduced.

In a second aspect of the present application, a lithium battery is also presented, comprising the battery module described above.

Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present application, and is not intended to limit the present application, but although the present application has been described in detail with reference to the foregoing embodiment, it will be apparent to those skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments, or that equivalents may be substituted for part of the technical features thereof. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A connection structure, characterized by comprising:

an acquisition module;

the connector is fixed and connected to the acquisition module, and a straight socket is arranged on the connector;

the end part of the connecting strip is in plug-in fit with the connector through the straight socket; the connecting strip includes: a first connecting bar; a second connecting bar; one end of the first connecting strip and one end of the second connecting strip are arranged side by side and are in plug-in fit with the connector through the straight socket.

2. The connection structure according to claim 1, further comprising:

3. The connection structure according to claim 2, wherein the first connection bar, the second connection bar and the reinforcing sheet are combined to form a golden finger structure adapted to the straight socket and are in plug-in fit with the connector through the straight socket.

4. A connection structure according to claim 2 or 3, wherein an anti-falling buckle is provided at a straight socket of the connector, a clamping groove is provided on the reinforcing sheet corresponding to the anti-falling buckle, and the anti-falling buckle and the reinforcing sheet are in clamping fit through the clamping groove.

5. A battery module, comprising:

the connecting structure of any one of claims 1-4.

6. The battery module of claim 5, further comprising:

a plurality of battery cells;

and the aluminum bars are provided with a plurality of aluminum bars and are fixedly connected with the battery cells.

7. The battery module of claim 6, wherein the collection module, the connector and the connecting bar are provided in plurality, and the aluminum bars, the collection module and the connectors are fixedly connected in one-to-one correspondence.

8. The battery module of claim 6, wherein a plurality of the connectors are connected in series by the first connecting bar and the second connecting bar.

9. A lithium battery, comprising:

the battery module according to any one of claims 5 to 8.