CN219419236U

CN219419236U - Top cap subassembly, electric core and battery module

Info

Publication number: CN219419236U
Application number: CN202223506365.0U
Authority: CN
Inventors: 盛军; 李斌; 俞会根
Original assignee: Beijing WeLion New Energy Technology Co ltd
Current assignee: Beijing WeLion New Energy Technology Co ltd
Priority date: 2022-12-27
Filing date: 2022-12-27
Publication date: 2023-07-25
Anticipated expiration: 2032-12-27

Abstract

The utility model relates to the field of batteries and discloses a top cover assembly, an electric core and a battery module. The top cover assembly comprises a top cover body and two current collectors arranged on the side surfaces of the top cover body, wherein one side, far away from the top cover body, of each current collector is used for being connected with a pole piece or a pole outlet of a winding core, and a limiting piece used for limiting the pole piece or the pole outlet of the winding core connected with the current collectors is arranged on the top cover body. The battery cell comprises the top cover assembly and the bottom shell. The battery module comprises a plurality of the electric cores. The top cover assembly comprises the limiting piece, and the limiting piece can limit the top cover body after the part of the outlet electrode of the winding core or the pole piece is broken or fails in welding, so that the phenomenon that the outlet electrode of the winding core or the pole piece is contacted with each other or the outlet electrode of the winding core or the pole piece is contacted with the bottom shell is avoided, the internal short circuit of the battery core is avoided, and the use safety is ensured.

Description

Top cap subassembly, electric core and battery module

Technical Field

The utility model relates to the field of batteries, in particular to a top cover assembly, an electric core and a battery module.

Background

With the recent increase of environmental and energy problems, new energy electric vehicles gradually enter the field of view of the public, and lithium ion power battery packs are also receiving a great deal of attention as a main power source of the new energy electric vehicles. However, many safety problems are inevitably caused while the development is underway. The battery comprises a plurality of battery modules, each battery module comprises a plurality of battery cells, and therefore the use safety of the battery pack is actually that of the battery cells. The pole piece of traditional electric core or the play utmost point welding of rolling up the core are in the both sides of top cap subassembly, if take place partial pole piece or roll up the play utmost point fracture of core, and longer copper goes out the utmost point and probably contact together with aluminium, leads to electric core internal short circuit, influences the security of using.

Disclosure of Invention

In order to solve the above technical problems or at least partially solve the above technical problems, the present utility model provides a top cap assembly, a battery cell and a battery module.

The utility model provides a top cover assembly, which comprises a top cover body and two current collectors arranged on the side face of the top cover body, wherein one side, far away from the top cover body, of each current collector is used for being connected with a pole piece or a pole winding core, and a limiting piece used for limiting the pole piece or the pole winding core connected with the current collectors is arranged on the top cover body.

Optionally, the limiting piece comprises a protective cover arranged on one side, far away from the top cover body, of the current collector, and a cavity for accommodating the pole piece or the pole outlet of the winding core is formed between the protective cover and the current collector.

Optionally, an opening through which the pole piece or the pole of the winding core can pass is formed in the protective cover.

Optionally, the opening extends to a side of the protective cover.

Optionally, an insulating plate is arranged on the side surface of the top cover body, and the current collector is arranged on one side of the insulating plate, which is far away from the top cover body.

Optionally, the protective cover is connected with the insulating plate through a buckle assembly.

Optionally, a pole is arranged on the top cover body in a penetrating way, one end of the current collector is connected with the pole in a welding way, and the other end of the current collector is connected with the pole piece or the pole outlet of the winding core in a welding way.

Optionally, an installation groove is formed in the side face of the top cover body, the current collector is Z-shaped, and a part of the current collector connected with the pole piece or the pole outlet of the winding core is arranged in the installation groove.

The utility model also provides a battery cell, which comprises the top cover assembly and a bottom shell buckled with the top cover assembly.

The utility model also provides a battery module, which comprises a plurality of the battery cells.

Compared with the prior art, the technical scheme provided by the embodiment of the utility model has the following advantages:

the top cover assembly comprises the limiting piece, and the limiting piece can limit the top cover body after the part of the outlet electrode of the winding core or the pole piece is broken or fails in welding, so that the phenomenon that the outlet electrode of the winding core or the pole piece is contacted with each other or the outlet electrode of the winding core or the pole piece is contacted with the bottom shell is avoided, the internal short circuit of the battery core is avoided, and the use safety is ensured.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model.

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.

Fig. 1 is a schematic view illustrating a structure of a top cap assembly according to an embodiment of the present utility model;

fig. 2 is an exploded view of the cap assembly according to the embodiment of the present utility model.

Description of the reference numerals

1. A top cover body; 11. a mounting groove; 2. a current collector; 3. a limiting piece; 4. a protective cover; 5. an opening; 6. an insulating plate; 7. a clasp assembly; 71. a clamping block; 72. a clamping groove.

Detailed Description

In order that the above objects, features and advantages of the utility model will be more clearly understood, a further description of the utility model will be made. The embodiments of the present utility model and the features in the embodiments may be combined with each other without collision.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model may be practiced otherwise than as described herein; it is apparent that the embodiments in the specification are only some embodiments of the present utility model, but not all embodiments.

The utility model aims at protecting the internal short circuit of the battery possibly occurring, improving the safety of the single battery, and further aims at protecting the junction of the positive and negative copper foils and the aluminum foil of the single battery cell.

As shown in fig. 1 and 2, the top cover assembly provided in the embodiment of the present utility model includes a top cover body 1 and two current collectors 2 disposed on a side surface of the top cover body 1, specifically, the two current collectors 2 are disposed at intervals along a length direction of the top cover body 1, and the side surface of the top cover body 1 refers to a side of the top cover body 1 facing the bottom shell. One side of the current collector 2 far away from the top cover body 1 is used for being connected with the pole piece or the pole outlet of the winding core, so that the pole piece or the pole outlet of the winding core are arranged on two sides of the top cover body 1, and the pole piece or the pole outlet of the winding core on two sides are respectively an anode and a cathode. The top cover body 1 is provided with a limiting piece 3 for limiting the pole piece or the pole outlet of the winding core connected with the current collector 2.

The top cover assembly provided by the utility model comprises the limiting piece 3, and the limiting piece 3 can limit the top cover body 1 when the outlet pole of the winding core or the pole piece is broken or fails in welding, so that the phenomenon that the outlet poles of the winding core or the pole piece are contacted with each other or the outlet pole of the winding core or the pole piece is contacted with the bottom shell is avoided, the internal short circuit of the battery core is avoided, and the use safety is ensured.

As shown in connection with fig. 1 and 2, in some embodiments, the limiting member 3 includes a protective cover 4 disposed on a side of the current collector 2 away from the top cover body 1, and a cavity for accommodating the outgoing electrode of the pole piece or winding core is formed between the protective cover 4 and the current collector 2, such that the outgoing electrode of the pole piece or winding core is located inside the protective cover 4. Specifically, the number of the protective covers 4 is two, the two protective covers 4 are respectively arranged on one sides of the two current collectors 2 far away from the top cover body 1, and the protective covers 4 are connected with the top cover body 1.

Under this kind of design mode, can be restrained in the cavity that is enclosed by top cap body 1 and protective cover 4 after the play utmost point appearance part fracture of core or pole piece to avoid the internal short circuit of electric core, ensure the security of using.

In order to avoid that the pole of the winding core or the pole piece is distributed on two sides of the insulating plate 6 and a longer distance is reserved, an opening 5 through which the pole of the pole piece or the winding core passes can be formed in the protective cover 4, the pole of the pole piece or the winding core can pass through the opening 5 to be welded with the current collector 2, and further the pole of the winding core or the pole piece is broken or limited by the protective cover 4 after being in welding failure, so that short circuit inside the battery core is avoided. Preferably, the opening 5 is in a strip shape, and further optimally, the opening 5 extends to the side edge of the protective cover 4, and in the design mode, the opening 5 can avoid other parts, so that the space is reasonably utilized.

In some embodiments, the side of the top cover body 1 is provided with an insulating plate 6, and the current collector 2 is disposed on the side of the insulating plate 6 away from the top cover body 1. Specifically, the insulating plate 6 is disposed on the side of the top cover body 1 facing the bottom case, and the current collector 2 is disposed on the side of the insulating plate 6 facing the bottom case. Wherein, the shape of insulation board 6 suits with the shape of top cap body 1 for insulation board 6 can laminate in the side of top cap body 1.

Further preferably, the protective cover 4 is connected with the insulating plate 6 through a buckle assembly 7. Specifically, the buckle assembly 7 includes a clamping groove 72 provided on the insulating plate 6 and a clamping block 71 provided on the protective cover 4 and matched with the clamping groove 72, wherein the clamping block 71 can be inserted into the clamping groove 72 and positioned. Under this kind of design mode, during the installation, can directly with the protection lid 4 lock on insulation board 6, increase the convenience of installation.

The engagement of the latch 71 and the latch 72 is not limited, for example, the latch 72 and the latch 71 may be configured as a female and a male. Alternatively, the clamping groove 72 is in a strip shape, the clamping block 71 is an elastic buckle, and the elastic buckle can be inserted into the clamping groove 72 and then limited through the elasticity of the elastic buckle. It can be seen that the specific arrangement of the snap assembly 7 is not limited, as long as the mounting requirements of the protective cover 4 can be met.

The top cover body 1 is provided with a pole in a penetrating way, wherein the pole and the top cover body 1 are connected together through injection molding or riveting. One end of the current collector 2 is welded with the pole, and the other end of the current collector 2 is welded with the pole of the pole piece or the winding core. Specifically, the current collector 2 has a first end and a second end opposite to each other, and taking the direction shown in fig. 2 as an example, the first end of the current collector 2 shown on the left side in fig. 2 is the left end of the current collector 2, and the second end of the current collector 2 is the right end of the current collector 2. One end of the pole extends into one side of the top cover body 1 facing the bottom shell, and the first end of the current collector 2 is welded with the extending end of the pole, wherein the first end refers to a position of the current collector 2 close to the first end of the current collector; the second end of the current collector 2 is welded to the pole piece or the pole outlet of the winding core, where the second end refers to the position of the current collector 2 near the second end.

As shown in fig. 2, the side of the top cover body 1 is provided with a mounting groove 11, the current collector 2 is in a zigzag shape, and a part of the current collector 2 connected with the pole piece or the pole outlet of the winding core is arranged in the mounting groove 11, so that the current collector 2 of the part is prevented from extending out of the side of the top cover body 1, and the space inside the battery core can be ensured to meet the use requirement. Further optimally, the shape of the mounting groove 11 is matched with the shape of the protective cover 4, so that the structural strength of the top cover body 1 is prevented from being influenced by excessive slotting.

Wherein, the protection cover 4 of this application adopts non-metallic insulating material to make to ensure insulating effect, can alleviate the whole weight of electric core simultaneously.

The utility model also provides a battery cell, which comprises the top cover assembly and a bottom shell buckled with the top cover assembly, wherein the top cover assembly comprises all the technical characteristics of the top cover assembly.

The utility model also provides a battery module, which comprises a plurality of the battery cells. The battery cell comprises all technical characteristics of the battery cell, and further comprises all technical characteristics of the top cover assembly.

It should be noted that in this document, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The foregoing is only a specific embodiment of the utility model to enable those skilled in the art to understand or practice the utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown and described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The top cover assembly is characterized by comprising a top cover body (1) and two current collectors (2) arranged on the side faces of the top cover body (1), wherein one side, far away from the top cover body (1), of each current collector (2) is used for being connected with a pole piece or a pole outlet of a winding core, and a limiting piece (3) used for limiting the pole piece or the pole outlet of the winding core connected to the current collectors (2) is arranged on the top cover body (1).

2. The header assembly according to claim 1, characterized in that the limiting member (3) comprises a protective cover (4) arranged on the side of the current collector (2) away from the header body (1), and a cavity for accommodating the outgoing pole of a pole piece or winding core is formed between the protective cover (4) and the current collector (2).

3. The top cover assembly according to claim 2, wherein the protective cover (4) is provided with an opening (5) through which the pole piece or the pole of the winding core can pass.

4. A cap assembly according to claim 3, wherein the opening (5) extends to the side of the protective cover (4).

5. The header assembly according to claim 2, wherein the side of the header body (1) is provided with an insulating plate (6), and the current collector (2) is disposed on a side of the insulating plate (6) remote from the header body (1).

6. The header assembly according to claim 5, wherein the protective cover (4) is connected to the insulating plate (6) by a snap assembly (7).

7. The top cover assembly according to claim 1, wherein a pole is penetrated on the top cover body (1), one end of the current collector (2) is welded with the pole, and the other end of the current collector (2) is welded with a pole piece or a pole outlet of the winding core.

8. The top cover assembly according to any one of claims 1 to 7, wherein a mounting groove (11) is formed in a side surface of the top cover body (1), the current collector (2) is in a zigzag shape, and a part of the current collector (2) connected with the pole piece or the pole outlet of the winding core is arranged in the mounting groove (11).

9. A battery cell, wherein the battery cell comprises the top cover assembly according to any one of claims 1 to 8 and a bottom shell buckled with the top cover assembly.

10. A battery module comprising a plurality of cells according to claim 9.