CN218101468U - Battery and battery device - Google Patents

Abstract

The utility model relates to a battery technology field provides a battery and battery device. The battery includes: the battery shell comprises a body part and an inner concave part, wherein the inner concave part is inwards concave from the outer surface of the body part; the protective layer is coated on the outer surface of the battery shell; the protective layer comprises a first protective area and a second protective area, the first protective area covers at least part of the connection part of the inner concave part and the body part, the second protective area covers other parts of the battery shell, and the thickness of the first protective area is larger than that of the second protective area. This battery is through setting up first guard zone and second guard zone, according to different regional characteristics, carry out regional coating, can promote insulating protective effect. Simultaneously, the thickness of first guard zone is greater than the thickness of second guard zone in this battery, can strengthen the protective effect to the junction of internal recess and this somatic part, avoids the inoxidizing coating on the junction surface of internal recess and this somatic part to lose efficacy because of colliding with to promote the insulating protective effect of inoxidizing coating to the battery.

Description

Battery and battery device

Technical Field

The utility model relates to a battery technology field especially relates to a battery and battery device.

Background

In the prior art, a battery shell of a battery may be provided with an inner concave part, and the joint of the inner concave part and other parts of the battery shell is easily collided to cause the part of a protective layer to fall off, so that insulation failure is caused.

SUMMERY OF THE UTILITY MODEL

The utility model provides a battery and battery device to promote the insulating protective effect to the battery.

In order to achieve the above purpose, the utility model provides the following technical scheme:

according to a first aspect of the present invention, there is provided a battery, comprising: battery case and inoxidizing coating, wherein:

the battery shell comprises a body part and an inner concave part, wherein the inner concave part is arranged on the body part and inwards concaves from the outer surface of the body part;

the protective layer is coated on the outer surface of the battery shell and is an insulating protective layer; the protective layer comprises a first protective area and a second protective area, the first protective area covers at least part of the connection part of the inner concave part and the body part, the second protective area covers the rest part of the battery shell, and the thickness of the first protective area is larger than that of the second protective area.

The battery that this application provided includes battery case and inoxidizing coating, and the inoxidizing coating coats in battery case's surface, and first guard interval covers the part, even whole of the junction of interior recess and this body part, and the second guard interval covers the surface of other parts of battery case, and the thickness that covers in the first guard interval of the junction of interior recess and this body part is greater than the thickness that covers in the second guard interval of battery case remainder.

It should be noted that the battery provided by the application can be coated in different regions according to different region characteristics by arranging the first protection region and the second protection region, so that the insulation protection effect on the battery is improved. Simultaneously, in the battery that this application provided, the thickness of first guard zone is greater than the thickness of second guard zone, can strengthen the protective effect to the junction of internal concave part and this somatic part, avoids in assembly or the use, the inoxidizing coating on the junction surface of internal concave part and this somatic part because of colliding with the inefficacy to can further promote the insulating protective effect of inoxidizing coating to the battery.

According to a second aspect of the present application, there is provided a battery device comprising the battery provided in any of the above-mentioned aspects.

In the battery device provided by the application, the protective layer in the battery coats the outer surface of the battery shell, the first protective zone covers the part or even the whole of the junction of the inner concave part and the body part, the second protective zone covers the outer surfaces of other parts of the battery shell, and the thickness of the first protective zone covering the junction of the inner concave part and the body part is larger than the thickness of the second protective zone covering the rest part of the battery shell.

It should be noted that, in the battery device provided by the present application, the battery can be coated in different regions according to different region characteristics by setting the first protection region and the second protection region, so as to improve the insulation protection effect on the battery. Simultaneously, among the battery device that this application provided, the thickness of first protective zone in the battery is greater than the thickness of second protective zone, can strengthen the protective effect to the junction of internal concave part and noumenon portion, avoids in assembly or the use, the inoxidizing coating on the junction surface of internal concave part and noumenon portion inefficacy because of colliding with to can further promote the insulating protective effect of inoxidizing coating to the battery.

Drawings

For a better understanding of the present disclosure, reference may be made to the embodiments illustrated in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted so as to emphasize and clearly illustrate the technical features of the present disclosure. In addition, the relevant elements or components may be arranged differently as is known in the art. Further, in the drawings, like reference characters designate the same or similar parts throughout the several views. Wherein:

fig. 1 is a schematic perspective view of a battery case in a battery according to an embodiment of the present disclosure;

FIG. 2 is an enlarged partial schematic view of the structure of FIG. 1;

fig. 3 is a cross-sectional view at plane N of the battery case of fig. 2 after coating with a protective layer.

The reference numerals are illustrated below:

1. a battery case; 2. a first housing; 3. a body portion; 4. an inner concave portion; 5. an arc-shaped transition portion; 6. a second housing; 7. a protective layer; 8. a first guard area; 9. a second protected zone; q1, a first surface; q2, and a second surface.

Detailed Description

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, so it should be understood that various modifications and changes may be made to the example embodiments without departing from the scope of the present disclosure.

In the description of the present disclosure, unless otherwise explicitly specified or limited, the terms "first", "second", and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, references to "the" object or "an" object are also intended to mean one of possibly multiple such objects.

The terms "connected," "secured," and the like are to be construed broadly and encompass, for example, a fixed connection, a removable connection, an integral connection, an electrical connection, or a signal connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present disclosure can be understood by those skilled in the art as the case may be.

Further, in the description of the present disclosure, it is to be understood that the directional words "upper", "lower", "inner", "outer", etc., which are described in the exemplary embodiments of the present disclosure, are described at the angles shown in the drawings, and should not be construed as limiting the exemplary embodiments of the present disclosure. It will also be understood that, in the context of a connection between one element or feature and another element(s), "on," "under," or "inside" or "outside," it can be directly connected to the other element(s) "on," "under" or "inside" or "outside," or indirectly connected to the other element(s) "on," "under" or "inside" or "outside" through intervening elements.

In a first aspect, an embodiment of the present application provides a battery. Fig. 1 is a schematic perspective view of a battery case 1 in a battery provided in an embodiment of the present application; FIG. 2 is an enlarged partial schematic view of the structure of FIG. 1; fig. 3 is a cross-sectional view at plane N of the battery case 1 of fig. 2 after coating of the protective layer 7. As shown in fig. 1 to 3, the battery provided in the embodiment of the present application includes: battery case and inoxidizing coating, wherein:

the battery shell 1 comprises a body part 3 and an inner concave part 4, wherein the inner concave part 4 is arranged on the body part 3, and the inner concave part 4 is inwards concave from the outer surface of the body part 3;

the protective layer 7 is coated on the outer surface of the battery shell 1, and the protective layer 7 is an insulating protective layer; the protective layer 7 comprises a first protective region 8 and a second protective region 9, the first protective region 8 covers at least part of the connection of the inner recess 4 and the body part 3, the second protective region 9 covers the rest of the battery case 1, and the thickness of the first protective region 8 is greater than that of the second protective region 9.

Specifically, the battery provided by the embodiment of the application comprises a battery shell 1 and a protective layer 7, wherein the protective layer 7 is coated on the outer surface of the battery shell 1, the first protective zone 8 covers part or even all of the joint of the inner concave part 4 and the body part 3, the second protective zone 9 covers the outer surface of other parts of the battery shell 1, and the thickness of the first protective zone 8 covering the joint of the inner concave part 4 and the body part 3 is larger than that of the second protective zone 9 covering the rest part of the battery shell 1.

It should be noted that, the battery provided in the embodiment of the present application can be coated in different regions according to different region characteristics by providing the first protective region 8 and the second protective region 9, so as to improve the insulating protection effect on the battery. Simultaneously, the thickness of first protecting zone 8 is greater than the thickness of second protecting zone 9 in the battery that this application embodiment provided, can strengthen the protective effect to the junction of internal concave part 4 and this somatic part 3, avoids in assembly or the use, and the inoxidizing coating 7 on the junction surface of internal concave part 4 and this somatic part 3 is because of colliding with the inefficacy to can further promote the insulating protective effect of inoxidizing coating 7 to the battery.

It should be noted that, when the thicknesses of the first protection region 8 and the second protection region 9 in the protection layer 7 are set, the thickness ratio of the first protection region 8 to the second protection region 9 needs to be considered to ensure the protection effect on the battery.

In one embodiment, there may be provided: the ratio of the thickness of the first protective zone 8 to the thickness of the second protective zone 9 ranges from 1.2 to 2.5.

It should be noted that if the ratio is too small, the thickness of the first protection region 8 is relatively thin, which cannot effectively ensure the protection effect on the connection between the inner concave portion 4 and the body portion 3, and is prone to causing insulation failure; if the specific value is set too large, the thickness of the first protection region 8 is too thick, and the first protection region occupies too much volume, which is not favorable for improving the space utilization rate of the battery device. Therefore, when the ratio of the thickness of the first guard area 8 to the thickness of the second guard area 9 is set to the above range, the influence can be well balanced everywhere.

Illustratively, the ratio of the thickness of the first guard region 8 to the thickness of the second guard region 9 may be selected to be any one of the following values:

1.2、1.22、1.24、1.26、1.28、1.3、1.32、1.34、1.36、1.38、1.4、1.42、1.44、1.46、1.48、1.5、1.52、1.54、1.56、1.58、1.6、1.62、1.64、1.66、1.68、1.7、1.72、1.74、1.76、1.78、1.8、1.82、1.84、1.86、1.88、1.9、1.92、1.94、1.96、1.98、2、2.02、2.04、2.06、2.08、2.1、2.12、2.14、2.16、2.18、2.2、2.22、2.24、2.26、2.28、2.3、2.32、2.34、2.36、2.38、2.4、2.42、2.44、2.46、2.48、2.5。

in one embodiment, the thickness of the second guard region 9 ranges from 70 μm to 130 μm.

It should be noted that the thickness of the second protection region 9 is too thin, which may cause the insulation protection of the battery case to be failed; the thickness of the second protection region 9 is too thick, which increases the overall volume of the battery and even leads to weight increase of the battery. Thus, when the thickness range of the second guard region 9 is set to the above range, the insulation effect, the weight, and the volume influence can be well balanced.

Illustratively, the thickness of the second guard area 9 may be selected to be any one of the following values:

70μm、71μm、72μm、73μm、74μm、75μm、76μm、77μm、78μm、79μm、80μm、81μm、82μm、83μm、84μm、85μm、86μm、87μm、88μm、89μm、90μm、91μm、92μm、93μm、94μm、95μm、96μm、97μm、98μm、99μm、100μm、101μm、102μm、103μm、104μm、105μm、106μm、107μm、108μm、109μm、110μm、111μm、112μm、113μm、114μm、115μm、116μm、117μm、118μm、119μm、120μm、121μm、122μm、123μm、124μm、125μm、126μm、127μm、128μm、129μm、130μm。

when the first protection zone 8 is specifically arranged, there are many possibilities of the structure thereof, and at least one of the following structures is provided.

In one embodiment, referring to the structure shown in fig. 3, the first protective zone 8 comprises only one coating sublayer. In other words, the first guard area 8 has a single-layer structure.

It should be noted that, since the first protection region 8 is a single-layer structure, the first protection region 8 can be formed in one step through a manufacturing process. It should be understood that the structure arrangement can simplify the preparation process and improve the preparation efficiency.

It is noted that either the first guard region 8 or the second guard region 9 may be prepared first, followed by the other. Of course, different devices can be used to prepare the first protection zone 8 and the second protection zone 9 at the same time, which is not described herein again.

It is to be understood that the wrapping form of the first guard region 8 and the second guard region 9 on the outer surface of the battery case 1 is not limited to the structure shown in fig. 3, for example, the first guard region 8 may be transitionally connected with the second guard region 9 at the intersection with the second guard region 9, or may be beyond the second guard region 9 in the thickness direction.

It should be noted that, when the first protection zone 8 is in transitional connection with the second protection zone 9, the thickness of the intersection of the first protection zone 8 may be equal to the thickness of the second protection zone 9, which may be specifically set according to the requirement, and will not be described herein again.

The same or different materials may be used in the preparation of the first and second guard regions 8, 9. Illustratively, taking the first protective zone 8 and the second protective zone 9 as examples of separate preparation, in one embodiment, the material of the first protective zone 8 is different from that of the second protective zone 9, and as an example, as shown in fig. 3.

In one embodiment, the first guard region 8 includes a plurality of coating sublayers, and the plurality of coating sublayers are stacked.

It should be noted that, when the first protection region 8 includes a plurality of coating sub-layers, the preparation materials of the coating sub-layers may be selected respectively, so as to optimize the insulating protection effect of the protection layer 7 on the battery.

It is understood that "plurality" means at least two; when the materials for preparing the plurality of coating sublayers are the same, the first protective region 8 may not visually recognize the boundary between the coating sublayers in appearance, which is not described herein again.

In particular, when the first protective region 8 is prepared, at least one of the plurality of coating sublayers may be made of the same material as the second protective region 9, so as to further simplify the preparation process.

The first protective zone 8 is schematically illustrated by including two coating sublayers, which are as follows:

in the process of preparing and forming the protective layer 7, a coating sublayer for forming the first protective region 8 can be prepared; thereafter, another coating sublayer is prepared simultaneously with the preparation of the second guard zone 9.

For example, if the thickness of the first protection region 8 is 120 μm, a certain thickness of insulating material may be sprayed or coated on the surface of the junction between the inner recess 4 and the body portion 3 to form a coating sub-layer, for example, a coating sub-layer with a thickness of 20 μm is formed first; the surface of the battery shell 1 is integrally sprayed to form a second protective area 9 with the thickness of 100 μm on the surface of the battery shell 1, and at this time, another coating sublayer with the thickness of 100 μm is synchronously formed.

Of course, the protective layer 7 can also be prepared in other ways. Illustratively, the battery case 1 may be integrally sprayed to form the second protective region 9 and a coating sublayer; a new coating sublayer is then formed where the inner recess 4 and the body portion 3 are separately sprayed, the first guard zone 8 being formed by the two coating sublayers.

In one embodiment, with continued reference to the structure shown in fig. 3, the battery case 1 further includes an arc-shaped transition portion 5, where the arc-shaped transition portion 5 is located at the connection between the concave portion 4 and the body portion 3, and connects the concave portion 4 and the body portion 3;

the first guard zone 8 covers the curved transition 5.

It should be noted that when the junction between the body portion 3 and the concave portion 4 is arc-shaped, an arc-shaped transition portion 5 is formed. The arc-shaped transition part 5 can prevent the outer surface of the battery shell 1 from forming sharp corners, scratching the battery or other structures, thereby improving the safety performance of the battery.

It is to be noted that there are many possibilities for the structure of the battery case 1 in the embodiment of the present application, at least one of the following structures.

In one embodiment, the battery case 1 is divided into a first case 2 and a second case 120, wherein the first case 2 includes a body portion 3, and the body portion 3 has an opening; the inner concave part 4 is positioned on one side of the body part 3, which faces away from the opening, and the inner concave part 4 is positioned at the end part of the first shell 2; the second housing 120 is snap-fitted to the opening;

the first guard region 8 covers the junction of the inner recess 4 and the body portion 3, and the second guard region 9 covers the other portion of the battery case 1.

It should be noted that, the battery provided in the embodiment of the present application can be coated in different regions according to different region characteristics by providing the first protective region 8 and the second protective region 9, so as to improve the insulating protection effect on the battery. Simultaneously, the thickness of first protective zone 8 is greater than the thickness of second protective zone 9 in the battery that this application embodiment provided, can strengthen the protective effect to the junction of internal concave part 4 and this somatic part 3, avoids in assembly or the use, inoxidizing coating 7 on internal concave part 4 surface because of colliding with the inefficacy to can further promote inoxidizing coating 7 to the insulating protective effect of battery.

It should be noted that the cell, the electrolyte, and the like are disposed in the chamber formed by the first casing 2, which is not described in detail herein. In a specific configuration, the second housing 120 may be made of aluminum.

In one embodiment, with continuing reference to the structures shown in fig. 1 to 2, the outer surface of the battery case 1 includes two first surfaces Q1 disposed oppositely and four second surfaces Q2 disposed around the first surfaces Q1, wherein the area of the second surfaces Q2 is smaller than that of the first surfaces Q1; the first housing 2 forms one first surface Q1 and four second surfaces Q2, and the second housing 120 forms the other first surface Q1;

the concave portion 4 is located on the first surface Q1 of the first housing 2.

Illustratively, as shown in fig. 1, the battery case 1 may have a substantially rectangular parallelepiped shape. Specifically, the area of the first surface Q1 may be larger than that of the second surface Q2, forming a large surface of the battery; of the four second surfaces Q2, every two second surfaces Q2 are oppositely arranged; and among the four second surfaces Q2, two second surfaces Q2 have a larger area, and two second surfaces Q2 have a smaller area.

It should be noted that when the battery is placed, one second surface Q2 with a larger area can be used as the bottom surface of the battery, and correspondingly, the other second surface Q2 with a larger area can be used as the top surface of the battery. Meanwhile, the other two second surfaces Q2 having a smaller area form the sides of the battery. Illustratively, two second surfaces Q2 having a larger area are arranged in the width direction, and two second surfaces Q2 having a smaller area are arranged in the length direction.

In a particular embodiment, the first guard zone 8 covers at least part of the junction of the female portion 4 and the body portion 3. For example, as shown in fig. 2, the first guard region 8 may cover a thicker black line surrounding portion in fig. 2, taking the intersection of the second surface Q2 at the top and the concave portion 4 as an example. Of course, the first protection zone 8 may also cover the intersection of the inner recess 4 and other surfaces of the body portion 3, which may be specifically set according to requirements, for example, the first protection zone 8 may cover the intersection of the first surface Q1 and the edge of the inner recess 4.

It should be noted that, the thickness of the first protection zone 8 is greater than the thickness of the second protection zone 9 in the battery provided in the embodiment of the present application, so that the protection effect on the joint of the internal concave part 4 and the body part 3 can be enhanced, and the failure of the protection layer 7 due to collision in the assembly or use process is avoided, thereby further improving the insulation protection effect of the protection layer 7 on the battery.

Simultaneously, the battery that this application embodiment provided can be according to different regional characteristics, carry out regional coating through setting up first guard zone 8 and second guard zone 9 to promote the insulating protective effect to the battery.

In another specific embodiment, the first guard region 8 covers the junction of the female portion 4 and the body portion 3 at each location.

It should be noted that, this arrangement can ensure that the connection between the concave portion 4 and the main body portion 3 at each position can be protected well, so as to improve the insulation protection effect for the battery.

In one embodiment, the second case 120 is provided with two electrode terminals disposed oppositely.

It should be noted that a cell is provided in the battery case 1, and the cell is connected to each electrode terminal.

It is understood that each cell includes electrode terminals of a first polarity and electrode terminals of a second polarity.

The electrode terminals of the first polarity are opposite in polarity to the electrode terminals of the second polarity, and are insulated from each other. Specifically, when the electrode terminal of the first polarity is a positive terminal, the electrode terminal of the second polarity is a negative terminal, whereas when the electrode terminal of the first polarity is a negative terminal, the electrode terminal of the second polarity is a positive terminal.

Specifically, 1 surface of battery case can be equipped with a protrusion in surperficial electrode terminal (utmost point post), also can be equipped with two protrusions in the electrode terminal (utmost point post) on casing surface, specifically can set up according to the demand, no longer gives unnecessary details here.

When a plurality of cells are stacked, the first case 2 of the latter cell is opposed to the second case 120 of the former cell, and at least a part of the electrode terminal of one cell of the adjacent two cells is placed in the inner recess 4 of the other cell.

In a second aspect, an embodiment of the present application further provides a battery device, including the battery provided in any of the above technical solutions.

Specifically, in the battery device provided in the embodiment of the present application, the battery includes a battery case 1 and a protective layer 7, where the protective layer 7 is coated on the outer surface of the battery case 1, the first protective region 8 covers part or even all of the connection portion of the inner recess 4 and the body portion 3, the second protective region 9 covers the outer surface of the other portion of the battery case 1, and the thickness of the first protective region 8 covering the connection portion of the inner recess 4 and the body portion 3 is greater than the thickness of the second protective region 9 covering the remaining portion of the battery case 1.

It should be noted that, in the battery device provided in the embodiment of the present application, the battery can be coated in different regions according to different region characteristics by providing the first protective region 8 and the second protective region 9, so as to improve the insulating protection effect on the battery. Simultaneously, among the battery device that this application embodiment provided, the thickness of first protecting zone 8 in the battery is greater than the thickness of second protecting zone 9, can strengthen the protective effect to the junction of internal concave part 4 and this somatic part 3, avoids in assembly or the use, and the inoxidizing coating 7 on the junction surface of internal concave part 4 and this somatic part 3 is because of colliding with the inefficacy to can further promote the insulating protective effect of inoxidizing coating 7 to the battery.

In one embodiment, the number of the cells is plural, each cell includes a first case 2 and a second case 120, and the first case 2 includes an inner recess 4, the second case 120 is provided with an electrode terminal along the arrangement direction of the first case 2 and the second case 120 in the cell, the plural cells are stacked, and at least a part of the electrode terminal of one cell is placed in the inner recess 4 of another cell in two adjacent cells.

It should be noted that, when a plurality of cells are stacked in the thickness direction, and the electrode terminal of one cell is disposed in the inner concave portion 4 of another cell, the size of the stacked plurality of cells in the thickness direction can be reduced, which is beneficial to improving the space utilization rate in the cell device.

In addition, it is worth noting that the connection part of the inner concave part 4 and the body part 3 is covered with the thicker first protection area 8, so that the insulating failure phenomenon caused by the fact that the pole of the adjacent battery collides with the connection part of the inner concave part 4 and the body part 3 when a plurality of batteries are assembled can be avoided.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the invention 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 example embodiments 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 (8)

1. A battery, comprising: battery case and inoxidizing coating, wherein:

the battery shell comprises a body part and an inner concave part, wherein the inner concave part is arranged on the body part and inwards concaves from the outer surface of the body part;

the protective layer is coated on the outer surface of the battery shell and is an insulating protective layer; the protective layer comprises a first protective area and a second protective area, the first protective area covers at least part of the connection part of the inner concave part and the body part, the second protective area covers the rest part of the battery shell, and the thickness of the first protective area is larger than that of the second protective area.

2. The battery of claim 1, wherein a ratio of the thickness of the first guard region to the thickness of the second guard region is in a range of 1.2 to 2.5.

3. The battery of claim 2, wherein the second guard region has a thickness dimension of 70 μm to 130 μm.

4. The cell of claim 3, wherein the first guard zone comprises only one coating sublayer.

5. The cell defined in claim 3, wherein the first guard region comprises a plurality of coating sublayers, and the plurality of coating sublayers overlap.

6. The battery of any of claims 1-5, wherein the battery housing further comprises an arcuate transition portion at a junction of the recessed portion and the body portion connecting the recessed portion and the body portion;

the first guard area covers the arc-shaped transition portion.

7. The battery of claim 6, wherein the battery housing is divided into a first shell and a second shell, wherein the first shell includes the body portion having an opening; the concave part is positioned on one side, away from the opening, of the body part, and the concave part is positioned at the end part of the first shell; the second shell is buckled with the opening;

the first protection zone covers the connection part of the concave part and the body part, and the second protection zone covers other parts of the battery shell.

8. A battery device comprising a battery according to any one of claims 1 to 7.

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