CN109037745B

CN109037745B - Battery cell, battery and electronic equipment

Info

Publication number: CN109037745B
Application number: CN201710434575.8A
Authority: CN
Inventors: 郑忠香
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2017-06-09
Filing date: 2017-06-09
Publication date: 2020-10-16
Anticipated expiration: 2037-06-09
Also published as: CN109037745A

Abstract

The disclosure relates to an electric core, a battery and electronic equipment, wherein the electric core comprises a naked electric core, the naked electric core comprises a positive plate, a negative plate and an isolation film for isolating the positive plate and the negative plate; the edge area of the isolation film protrudes out of the corresponding edge area of the naked battery cell to form a protruding part, and a reinforcing layer is arranged on the surface of the protruding part and used for reinforcing the strength of the protruding part; wherein the reinforcing layer is made of an insulating material; this disclosed technical scheme sets up the enhancement layer through on the protruding portion of barrier film in naked electric core to strengthen the intensity of protruding portion, can reduce because the protruding portion turn-up makes the risk that positive plate and negative pole piece switched on in the naked electric core, improve the factor of safety of electric core.

Description

Battery cell, battery and electronic equipment

Technical Field

The present disclosure relates to the field of terminal technologies, and in particular, to an electrical core, a battery, and an electronic device.

Background

At present, based on the advantages of light weight, large capacity, good safety performance and the like of the soft package battery, the method has gradually become a main consideration object for battery type selection in most electronic equipment, so that the manufacturing and packaging of the battery cell in the soft package battery also become important factors for judging whether the soft package battery meets the design standard.

Disclosure of Invention

The present disclosure provides a battery cell, a battery and an electronic device to solve the deficiencies in the related art.

According to a first aspect of the embodiments of the present disclosure, there is provided an electrical core, including:

the bare cell comprises a positive plate, a negative plate and an isolating membrane for isolating the positive plate and the negative plate;

the edge area of the isolation film protrudes out of the corresponding edge area of the naked battery cell to form a protruding part, and a reinforcing layer is arranged on the surface of the protruding part and used for reinforcing the strength of the protruding part;

wherein the reinforcing layer is made of an insulating material.

Optionally, the protruding portion is located at the bottom of the bare cell.

Optionally, the reinforcing layer includes a first reinforcing layer, and the first reinforcing layer is close to the negative electrode plate.

Optionally, the reinforcing layer comprises a second reinforcing layer, the second reinforcing layer being adjacent to the positive electrode tab.

Optionally, the reinforcing layer wraps around an edge region of the release film.

Optionally, the first end and the second end of the reinforcing layer are respectively connected to the positive plate and the negative plate.

Optionally, the reinforcing layer is formed by curing glue applied to the isolation film.

Optionally, the glue comprises a photosensitive glue.

According to a second aspect of the embodiments of the present disclosure, there is provided a battery including the battery cell according to the first aspect of the embodiments of the present disclosure.

According to a third aspect of the embodiments of the present disclosure, there is provided an electronic device including the battery according to the second aspect of the embodiments of the present disclosure.

According to the embodiment, the reinforcing layer is arranged on the protruding portion of the separation film in the bare cell, so that the strength of the protruding portion is enhanced, the risk that the positive plate and the negative plate are conducted in the bare cell due to the curling of the protruding portion can be reduced, and the safety factor of the cell is improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

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

Fig. 1 is a schematic structural diagram of a battery cell according to an exemplary embodiment.

Fig. 2 is a schematic cross-sectional view of a cell shown in accordance with an example embodiment.

Fig. 3 is a schematic cross-sectional view of another cell shown in accordance with an example embodiment.

Fig. 4 is a schematic cross-sectional view of another cell shown in accordance with an example embodiment.

Fig. 5 is a schematic cross-sectional view of another cell shown in accordance with an example embodiment.

Fig. 6 is a schematic cross-sectional view of another cell shown in accordance with an example embodiment.

Fig. 7 is a schematic cross-sectional view of another cell shown in accordance with an example embodiment.

FIG. 8 is an exploded schematic view of an electronic device shown in accordance with an example embodiment.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present application. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.

Fig. 1 is a schematic structural diagram of a battery cell according to an exemplary embodiment. As shown in fig. 1, the battery cell 100 includes a bare battery cell 1, where the bare battery cell 1 includes a positive electrode tab 11, a negative electrode tab 12, and a separation film 13 for separating the positive electrode tab 11 and the negative electrode tab 12, where the separation film 13 is disposed between the positive electrode tab 11 and the negative electrode tab 12; as shown in fig. 2, the edge region of the separation film 13 protrudes from the edge region of the bare cell 1 to form a protrusion 131, and a reinforcing layer 1311 may be disposed on the surface of the protrusion 131, so as to reinforce the strength of the protrusion 131, reduce the risk of conduction between the positive electrode tab 11 and the negative electrode tab 12 due to curling of the protrusion 131, and improve the safety factor of the cell 100; the reinforcing layer 1311 is made of an insulating material, so that double-layer insulation protection can be formed between the positive electrode sheet 11 and the negative electrode sheet 12, and the conduction risk between the positive electrode sheet 11 and the negative electrode sheet 12 is reduced.

In this embodiment, this protruding portion 131 can be located any one tip of naked electric core 1, for example, because the bottom of electric core 100 needs to cooperate with the outside in the assembling process, also makes the protruding portion 131 that is located the electric core 100 bottom easily buckle or damaged, so can set up the enhancement layer on the surface of the protruding portion 131 that is located naked electric core 1 bottom to reduce the risk that the short circuit takes place in the bottom, whole improvement electric core 100's factor of safety.

The reinforcing layer 1311 may be provided on any one surface or a plurality of surfaces of the protrusion 131; in one embodiment, as shown in fig. 3, the reinforcing layer 131 includes a first reinforcing layer 1311A, the first reinforcing layer 1311A is disposed adjacent to the negative electrode sheet 12, and one end of the first reinforcing layer 1311A is connected to the negative electrode sheet 12, so that foreign substances, particles, and the like in the air are reduced from adhering to the separator 13, and the risk of breakage of the separator 13 can be reduced; or as shown in fig. 4, the reinforcing layer 131 includes a second reinforcing layer 1311B, the first reinforcing layer 1311B is disposed adjacent to the positive electrode tab 11, and one end of the second reinforcing layer 1311B is connected to the positive electrode tab 11, thereby reducing the risk of foreign matter, particles, and the like in the air adhering to the separator 13 and reducing the risk of breakage of the separator 13; of course, the reinforcing layer 1311 may be provided on the same protrusion 131 on both the surface facing the positive electrode tab 11 and the surface facing the negative electrode tab 12, which is not limited by the present disclosure.

In another embodiment, as shown in fig. 5, the reinforcing layer 1311 may wrap the edge region of the separator 13, i.e., the reinforcing layer 1311 is provided on the surface of the tab 131 facing the positive electrode tab 11, the surface facing the negative electrode tab 12, and the end surface of the tab 131, so as to further stabilize the structural strength of the tab 131; as shown in fig. 6, the first end and the second end of the reinforcing layer 1311 may be connected to the positive electrode tab 11 and the negative electrode tab 12, respectively, so that foreign matters and particles in the air may be prevented from adhering to the separator 13, the risk of damage to the separator 13 may be reduced, and the safety factor of the battery cell 100 may be improved.

Based on the above embodiments, the reinforcing layer 1311 may be a film that is optionally attached to the surface of the protruding portion 13; alternatively, the reinforcing layer 1311 may be formed by curing glue applied to the isolation film 13, for example, by curing photosensitive glue applied to the isolation film 13, which is not limited by the disclosure.

It should be noted that: as shown in fig. 7, when multiple layers of positive electrode sheets 11 and negative electrode sheets 12 exist in the battery cell 100, adjacent positive electrode sheets 11 and negative electrode sheets 12 are separated by the separation film 13, so that corresponding protrusions 131 may be formed, wherein the reinforcement layer 1311 may be disposed on any one or more of the protrusions 131, which is not limited by the present disclosure.

Correspondingly, as shown in fig. 8, the battery cell 100 described in the above embodiments may be processed into a battery 200, and the battery 200 may be used to supply power to any electronic device 300; the electronic device 300 may include a mobile phone, a tablet computer, an e-reader, etc., which is not limited by the disclosure.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. An electric core is characterized by comprising a naked electric core, wherein the naked electric core comprises a positive plate, a negative plate and an isolating film for isolating the positive plate and the negative plate;

the edge area of the isolation film protrudes out of the corresponding edge area of the naked battery cell to form a protruding part, a reinforcing layer is arranged on the surface of the protruding part to reinforce the strength of the protruding part, and the protruding part is arranged on the edge of the bottom of the battery cell;

wherein the reinforcing layer is made of an insulating material.

2. The cell of claim 1, wherein the protrusion is located at the bottom of the bare cell.

3. The electrical core of claim 1, wherein the reinforcement layer comprises a first reinforcement layer proximate to the negative electrode tab.

4. The cell of claim 1, wherein the reinforcement layer comprises a second reinforcement layer proximate to the positive electrode tab.

5. The cell of claim 1, wherein the reinforcement layer wraps around an edge region of the separator film.

6. The cell of claim 5, wherein the first and second ends of the reinforcement layer are connected to the positive and negative plates, respectively.

7. The battery cell of claim 1, wherein the reinforcing layer is formed by curing a glue applied to the separator.

8. The electrical core of claim 7, wherein the glue comprises a photosensitive glue.

9. A battery comprising the cell of any one of claims 1 to 8.

10. An electronic device comprising the battery of claim 9.