CN219959364U - Cell and cell module - Google Patents

Abstract

The utility model provides a battery cell and a battery cell module, wherein the battery cell comprises: the support comprises a containing part and an abutting part, wherein the abutting part is arranged on the side part of the containing part, the abutting part abuts against the end part of the pole group, the containing part is used for containing the pole lugs, two sides, close to the end part of the pole group, of the containing part are provided with notch parts, the notch parts are provided with turning plates, and under the condition that the welding of the pole lugs is completed, the turning plates are turned over to cover the notch parts. This electric core passes through the cooperation of support, apron and switch-on structure to utilize the holding portion protection utmost point ear of support, keep apart the utmost point ear in with holding portion and external world through turning over the folded plate, realized the protection of the utmost point ear after the welding is accomplished, avoid the electric connection that causes the utmost point ear to collide with and cause the damage when installing the shell and take place the short circuit and appear the safety problem, guaranteed the utmost point ear safety when the assembly, promoted the rationality of structure.

Description

Cell and cell module

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery cell and a battery cell module.

Background

With the continuous popularization of new energy sources, the performance requirements on lithium ion batteries are also higher and higher. The requirements for cell assembly are also increasing.

The electrode lug at the end part of the electrode group of the traditional battery cell can lead to the electrode lug to be directly exposed outside after welding due to the fact that no corresponding protection structure exists in the assembly process, so that the electrode lug can collide with the shell and damage the electrode lug when the shell is installed in the electrode group, and further the electrical connection is short-circuited, and the safety problem occurs.

Therefore, it is necessary to design a battery cell to solve the above problems.

Disclosure of Invention

In view of the above, in order to overcome the defects of the prior art, the utility model provides a battery cell and a battery cell module, which effectively solve the problems that the electrode lugs at the end parts of the existing electrode group are not protected and are easy to damage, meanwhile, the electrode lug protection difficulty of the full electrode lug structure is high, the existing protection structure is easy to cause protection failure and the sealing welding yield is affected.

According to a first aspect of the utility model, there is provided a battery cell including a pole group, a pole lug is disposed at an end of the pole group, wherein the battery cell includes a bracket including a receiving portion and an abutting portion, the abutting portion is disposed at a side portion of the receiving portion, the abutting portion abuts against the end of the pole group, the receiving portion is used for receiving the pole lug, a notch portion is formed at two sides of the receiving portion, which is close to the end of the pole group, and the notch portion is provided with a turning plate, and the turning plate is turned to cover the notch portion when welding of the pole lug is completed.

Preferably, the bracket further comprises a surrounding part, the surrounding part is formed into an annular frame body, the surrounding part is arranged on the periphery of the bracket, and the height of the accommodating part is the same as that of the surrounding part; the accommodating part is communicated with the surrounding part through the notch part.

Preferably, the tabs are arranged in the middle of the end part of the pole group, the number of the abutting parts is two, and the two abutting parts are respectively arranged at two sides of the accommodating part; the plane of the abutting part abutting against the end part of the pole group is formed into a grid-shaped structure, and an opening is formed at the connecting position of the accommodating part and the abutting part.

Preferably, the folding plate is connected with the notch portion through a plurality of folding points, and the plurality of folding points are uniformly arranged at the bottom edge of the notch portion.

Preferably, the battery cell further comprises a cover plate, and the cover plate is arranged at the top of the bracket; the conducting structure comprises a sealing insulating part and a conducting part, wherein the conducting part penetrates through the accommodating part and is communicated with the electrode lug, and the sealing insulating part is arranged between the conducting part and the bracket; the conducting part comprises a conducting pressing sheet, a conducting fixing piece and a conducting connecting sheet, the conducting connecting sheet is arranged in the accommodating part and is abutted to the lug, one end of the conducting fixing piece penetrates through the accommodating part and the sealing insulating part to be connected with the conducting connecting sheet, and the other end of the conducting fixing piece is connected with the conducting pressing sheet.

Preferably, the seal insulating part includes a first seal insulating member and a second seal insulating member, the first seal insulating member being disposed between the conductive connecting piece and the bracket; the second seal insulator is disposed between the cover plate and the conductive pad.

Preferably, the conductive pressing piece and the second sealing insulator are arranged outside the cover plate, and the second sealing insulator is arranged between the conductive pressing piece and the cover plate.

Preferably, the conductive fixing piece is a rivet, the conductive pressing piece, the second sealing insulating piece and the conductive connecting piece are all provided with rivet holes, and the rivet penetrates through the conductive pressing piece and the second sealing insulating piece to be connected with the conductive connecting piece.

Preferably, the dimensions of the conductive tab, the conductive connecting piece and the second seal insulator match the dimensions of the tab.

According to a second aspect of the present utility model there is provided a cell module, wherein the cell module comprises a cell as described above.

According to the battery cell, the lug in the accommodating part is isolated from the outside through the turnover plate by matching the bracket, the cover plate and the conducting structure and utilizing the accommodating part of the bracket, so that the lug after welding is protected, the safety problem of short circuit of electric connection caused by damage to the lug caused by collision during mounting of the shell is avoided, the safety of the lug during assembly is ensured, and the rationality of the structure is improved.

In order to make the above objects, features and advantages of the present utility model more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 shows a schematic structural diagram of a battery cell according to an embodiment of the present utility model;

fig. 2 shows an exploded view of a cell according to an embodiment of the utility model;

FIG. 3 shows a schematic structural view of a bracket according to an embodiment of the present utility model;

FIG. 4 shows an enlarged schematic view of a portion of a bracket according to an embodiment of the utility model;

fig. 5 shows a schematic view of a portion of a cell structure according to an embodiment of the present utility model.

Reference numerals: 1-pole group; 101-electrode lugs; 2-a bracket; 201-turning plate; 2011-turning point; 202-a receiving portion; 203-abutment; 204—a surrounding portion; 205-rivet holes; 206-notch portion; 207-opening; 3-cover plate; 4-conducting tabletting; 5-rivets; 6-a conductive connecting sheet; 7-a first seal insulator; 8-a second seal insulator.

Detailed Description

The following detailed description is provided to assist the reader in obtaining a thorough understanding of the methods, apparatus, and/or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatuses, and/or systems described herein will be apparent after an understanding of the present disclosure. For example, the order of operations described herein is merely an example, and is not limited to the order set forth herein, but rather, obvious variations may be made upon an understanding of the present disclosure, other than operations that must occur in a specific order. In addition, descriptions of features known in the art may be omitted for the sake of clarity and conciseness.

The features described herein may be embodied in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein have been provided solely to illustrate some of the many possible ways of implementing the methods, devices, and/or systems described herein that will be apparent after understanding the present disclosure.

In the entire specification, when an element (such as a layer, region or substrate) is described as being "on", "connected to", "bonded to", "over" or "covering" another element, it may be directly "on", "connected to", "bonded to", "over" or "covering" another element or there may be one or more other elements interposed therebetween. In contrast, when an element is referred to as being "directly on," directly connected to, "or" directly coupled to, "another element, directly on," or "directly covering" the other element, there may be no other element intervening therebetween.

As used herein, the term "and/or" includes any one of the listed items of interest and any combination of any two or more.

Although terms such as "first," "second," and "third" may be used herein to describe various elements, components, regions, layers or sections, these elements, components, regions, layers or sections should not be limited by these terms. Rather, these terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first member, component, region, layer or section discussed in examples described herein could also be termed a second member, component, region, layer or section without departing from the teachings of the examples.

For ease of description, spatially relative terms such as "above … …," "upper," "below … …," and "lower" may be used herein to describe one element's relationship to another element as illustrated in the figures. Such 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 the device in the figures is turned over, elements described as "above" or "upper" relative to another element would then be oriented "below" or "lower" relative to the other element. Thus, the term "above … …" includes both orientations "above … …" and "below … …" depending on the spatial orientation of the device. The device may also be otherwise positioned (e.g., rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting of the disclosure. Singular forms also are intended to include plural forms unless the context clearly indicates otherwise. The terms "comprises," "comprising," and "having" are intended to specify the presence of stated features, integers, operations, elements, and/or groups thereof, but do not preclude the presence or addition of one or more other features, integers, operations, elements, and/or groups thereof.

Variations from the shapes of the illustrations as a result, of manufacturing techniques and/or tolerances, are to be expected. Accordingly, the examples described herein are not limited to the particular shapes shown in the drawings, but include changes in shapes that occur during manufacture.

The features of the examples described herein may be combined in various ways that will be apparent upon an understanding of the present disclosure. Further, while the examples described herein have a variety of configurations, other configurations are possible as will be apparent after an understanding of the present disclosure.

According to a first aspect of the present utility model, as shown in fig. 1 to 5, a battery cell is provided, wherein the battery cell is used for one side end of a pole group 1, such as a positive pole end or a negative pole end, the end of the pole group 1 is connected with a pole lug 101, the pole lug 101 can not be exposed after welding is completed through the battery cell, and further, under the condition that the pole group 1 is assembled with a housing, the pole lug 101 does not contact or collide with the housing (not shown), so that safety problems caused by short circuit of electrical connection are avoided, the pole lug 101 and an integral structure are protected, and the battery cell comprises a bracket 2, a cover plate 3 and a conducting structure.

In the following description, detailed structures of the holder 2, the cap plate 3, and the conductive structure of the battery cell will be described in detail with reference to fig. 1 to 5.

As shown in fig. 1 to 5, in the embodiment, the bracket 2 is used to protect the tab 101 and fix various components as described below. Specifically, the bracket 2 may include a receiving portion 202 and an abutting portion 203. As shown in fig. 2 to 4, the receiving portion 202 of the bracket 2 protrudes from the contact surface of the abutting portion 203 with the pole group 1 in a direction away from the end of the pole group 1, thereby forming a receiving space that can receive the tab 101 and a conductive connecting piece 6 described below. The number of the abutment portions 203 may be two, and the abutment portions 203 may be directly abutted against the end portions of the electrode group 1, and may be respectively provided on both sides of the accommodating portion 202. Preferably, two sides of the accommodating portion 202 near the end of the pole group 1 are formed with notch portions 206, and a bottom edge (i.e. a side far from the pole group 1) of the notch portion 206 is connected with a folding plate 201. The bracket 2 may be, for example, an injection molded part made of a plastic material in the prior art, after molding, the two side folding plates 201 are turned up to the top of the accommodating portion 202 (the folding plate 201 shown in fig. 3 is in a state of covering the notch 206), at this time, the below-described conductive connecting piece 6, conductive fixing piece and first sealing insulating piece 7 are mounted on the tab 101, and these three parts are already placed on the top of the tab 101, at this time, the bracket 2 is mounted, the conductive connecting piece 6, conductive fixing piece and first sealing insulating piece 7 are accommodated in the accommodating portion 202, and the conductive connecting piece 6 and the tab 101 are welded through the notch 206, and after the welding is completed, the folding plates 201 are folded, and the folding plates 201 cover the notch 206. In this way, when the remaining components are assembled and the housing is assembled later, the tab 101 is always inside the sealed and insulated accommodating portion 202 and cannot contact the housing or the like, and the tab 101 after the welding is completed is protected.

As shown in fig. 1 to 5, in an embodiment, the battery core may further include a conducting structure, where the conducting structure may include a sealing insulation portion and a conducting portion, the conducting portion is used for communicating the tab 101 and transmitting power to the outside, the sealing insulation portion is used for sealing and implementing insulation, and conductivity of the conducting portion and transmission stability of the power are ensured. The cover plate 3 is arranged at the top of the bracket 2 and serves as an end plate of the whole pole group 1, the cover plate 3 is matched with the shell to realize the assembly of the whole pole group 1, and after the cover plate 3 is installed, the conducting structure part extends out of the cover plate 3 and is used for the transmission of a negative electrode power supply.

Preferably, as shown in fig. 1 to 5, in the embodiment, the support 2 further includes a surrounding portion 204, and the surrounding portion 204 may be formed as an annular frame body, specifically, since the pole group 1 in the present embodiment is formed as an approximately rectangular parallelepiped structure, the surrounding portion 204 may be formed as a rectangular frame body (the structure and shape of the surrounding portion 204 need to be matched with those of the pole group 1 to meet the installation requirement), the surrounding portion 204 is disposed on the outer periphery of the support 2, and the height of the accommodating portion 202 is the same as the height of the surrounding portion 204, so that the installation is facilitated. In the case where the holder 2 is provided with the surrounding portion 204, the receiving portion 202 may communicate with the surrounding portion 204 through the notched portion 206, that is, the surrounding portion 204 is also correspondingly formed with the notched portion 206 for welding of the tab 101.

Preferably, as shown in fig. 1 to 5, in the embodiment, the tab 101 is disposed in the middle of the end of the pole group 1, so that the number of the abutment portions 203 of the bracket 2 is two, and the two abutment portions 203 are disposed on both sides of the receiving portion 202, respectively, so that the assembly is stable. Preferably, the plane where the abutting portion 203 abuts against the pole group 1 is formed in a grid-like structure, and the grid-like structure can make the overall structure lighter as a process hole. In addition, an opening 207 is formed at a position where the accommodating portion 202 and the abutting portion 203 are connected, and the opening 207 may be reduced in weight as a process hole.

Preferably, as shown in fig. 4, in the embodiment, the folding plate 201 and the notch 206 are connected by a plurality of folding points 2011, and the plurality of folding points 2011 are uniformly disposed at the bottom edge of the notch 206. In order to facilitate the folding of the folding plate 201, the connection position between the folding plate 201 and the notch 206 is designed into a form of multiple contact points (namely folding points 2011), so that the subsequent folding by an operator is facilitated, and the folding plate 201 can cover the notch 206 more accurately and completely after being folded.

Preferably, as shown in fig. 1 to 5, in the embodiment, the conducting part includes a conductive pressing sheet 4, a conductive fixing member and a conductive connecting sheet 6, the conductive connecting sheet 6 is disposed inside the accommodating part 202 and abuts against the tab 101, one end of the conductive fixing member is connected with the conductive connecting sheet 6 through the accommodating part 202 and the sealing insulating part, and the other end of the conductive fixing member is connected with the conductive pressing sheet 4. The sealing insulation part comprises a first sealing insulation piece 7 and a second sealing insulation piece 8, and the first sealing insulation piece 7 is arranged between the conductive connecting piece 6 and the bracket 2; a second sealing insulator 8 is arranged between the cover plate 3 and the conductive pad 4.

Specifically, the conductive connecting piece 6 may form a sheet structure, the overall size of the sheet structure is smaller than that of the tab 101, and the conductive connecting piece 6 may be completely welded to the tab 101 during welding, so that the conductivity is more excellent. The conductive fixing member may be formed as a rivet 5, one end of the rivet 5 is disposed in the conductive connecting piece 6 (the conductive connecting piece 6 is provided with a rivet hole 205 matched with the rivet 5), here, when the rivet 5 is disposed in the rivet hole 205 of the conductive connecting piece 6, the exposed periphery of the rivet 5 needs to be sleeved with a first sealing insulating member 7, and the first sealing insulating member 7 may be, for example, a rubber insulating ring, so that the conductive performance is prevented from being affected by the support 2 which is subsequently installed or the conductive performance is prevented from being damaged due to poor insulation. Preferably, in the embodiment, the number of rivets 5, i.e. conductive fixtures, is chosen to be two and symmetrically mounted to the conductive connection pads 6. At this time, after the positions of the conductive connecting pieces 6 and the tabs 101 are determined, the bracket 2 is mounted, and the top surface of the accommodating portion 202 of the bracket 2 is also provided with rivet holes 205 for facilitating the penetration of the rivets 5, so that after the bracket 2 is mounted, the tabs 101 and the conductive connecting pieces 6 are welded, and after the welding is completed, the turnover plate 201 is turned over to ensure that the tabs 101 are positioned in the accommodating portion 202. After that, the cover plate 3 is installed, and the cover plate 3 is also provided with rivet holes 205, so that the rivet 5 can be conveniently penetrated. The cover plate 3 is extended from the rivet 5 part after the cover plate 3 is installed, the second sealing insulator 8 is sleeved on the extended rivet 5, the second sealing insulator 8 is provided with a containing space which is sunken towards the direction close to the pole group 1, the part of the conductive pressing piece 4 matched with the second sealing insulator 8 protrudes outwards, the conductive pressing piece 4 can be clamped on the second sealing insulator 8, and the second sealing insulator 8 and the conductive pressing piece 4 are integrally formed into an oval structural part. In addition, the conductive pressing piece 4 and the second sealing insulating piece 8 are provided with corresponding rivets 5, and finally, after the conductive pressing piece 4 is installed, the conductive pressing piece 4 and the rivets 5 are welded for fixing. Here, the height of the rivet 5 is matched to these components, and the rivet 5 is flush with the conductive tab 4 or slightly below the conductive tab 4 after installation is complete (as shown in fig. 1 and 5). In this way, by the fitting engagement between the conduction structure and the bracket 2, protection of the tab 101 by the bracket 2 in the present embodiment is achieved and sealing and insulation of the end portion of the pole group 1 are achieved.

Preferably, the dimensions of the conductive tab 4, the dimensions of the conductive connecting piece 6 and the dimensions of the second seal insulator 8 match those of the tab 101. By "size matched" is meant herein: the bulky tab 101 requires a correspondingly bulky conductive pad 4, conductive tab 6 and second seal insulator 8 to achieve the stability of the mating of the current transfer.

This electric core passes through the cooperation of support, apron and switch-on structure to utilize the holding portion protection utmost point ear of support, keep apart the utmost point ear in with holding portion and external world through turning over the folded plate, realized the protection of the utmost point ear after the welding is accomplished, avoid the electric connection that causes the utmost point ear to collide with and cause the damage when installing the shell and take place the short circuit and appear the safety problem, guaranteed the utmost point ear safety when the assembly, promoted the rationality of structure.

Further, according to a second aspect of the present utility model, there is provided a cell module comprising a cell as described above.

Finally, it should be noted that: the above examples are only specific embodiments of the present utility model, and are not intended to limit the scope of the present utility model, but it should be understood by those skilled in the art that the present utility model is not limited thereto, and that the present utility model is described in detail with reference to the foregoing examples: any person skilled in the art may modify or easily conceive of the technical solution described in the foregoing embodiments, or perform equivalent substitution of some of the technical features, while remaining within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model, and are intended to be included in the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims (10)

1. The utility model provides a battery cell, includes the utmost point group, the tip of utmost point group is provided with the utmost point ear, its characterized in that, the battery cell includes:

the support comprises a containing part and an abutting part, wherein the abutting part is arranged on the side part of the containing part, the abutting part abuts against the end part of the pole group, the containing part is used for containing the pole lugs, two sides, close to the end part of the pole group, of the containing part are provided with notch parts, the notch parts are provided with turning plates, and under the condition that the welding of the pole lugs is completed, the turning plates are turned over to cover the notch parts.

2. The cell of claim 1, wherein the holder further comprises a surrounding portion formed as an annular frame body, the surrounding portion being provided at an outer periphery of the holder, the height of the receiving portion being the same as the height of the surrounding portion;

the accommodating part is communicated with the surrounding part through the notch part.

3. The battery cell according to claim 1, wherein the tab is disposed in a middle portion of an end portion of the pole group, the number of the abutment portions is two, and the two abutment portions are respectively disposed on two sides of the accommodating portion;

the plane of the abutting part abutting against the end part of the pole group is formed into a grid-shaped structure, and an opening is formed at the connecting position of the accommodating part and the abutting part.

4. The cell of claim 1, wherein the turnover plate and the notch are connected by a plurality of turnover points, the plurality of turnover points being uniformly disposed at a bottom edge of the notch.

5. The cell of claim 1, wherein the cell further comprises:

the cover plate is arranged at the top of the bracket;

the conducting structure comprises a sealing insulating part and a conducting part, wherein the conducting part penetrates through the accommodating part and is communicated with the electrode lug, and the sealing insulating part is arranged between the conducting part and the bracket;

the conducting part comprises a conducting pressing sheet, a conducting fixing piece and a conducting connecting sheet, the conducting connecting sheet is arranged in the accommodating part and is abutted to the lug, one end of the conducting fixing piece penetrates through the accommodating part and the sealing insulating part to be connected with the conducting connecting sheet, and the other end of the conducting fixing piece is connected with the conducting pressing sheet.

6. The cell of claim 5, wherein the seal insulator comprises a first seal insulator and a second seal insulator, the first seal insulator disposed between the conductive tab and the bracket; the second seal insulator is disposed between the cover plate and the conductive pad.

7. The cell of claim 6, wherein the conductive tab and the second seal insulator are disposed outside of the cover plate, the second seal insulator being disposed between the conductive tab and the cover plate.

8. The cell of claim 7, wherein the conductive fixing member is a rivet, the conductive pressing piece, the second sealing insulating member and the conductive connecting piece are provided with rivet holes, and the rivet penetrates through the conductive pressing piece and the second sealing insulating member to be connected with the conductive connecting piece.

9. The cell of claim 6, wherein the dimensions of the conductive tab, the conductive tab and the second seal insulator match the dimensions of the tab.

10. A cell module characterized in that it comprises a cell according to any one of claims 1 to 9.