CN218101469U - 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 is provided with a concave part which is inwards concave from the outer surface of the battery shell; the protective layer has insulating property and is coated on the outer surface of the battery shell; the protective layer includes a first region and a second region, wherein: the first region covers at least part of the recess, the second region covers other parts of the battery shell, and the first region is thicker than the second region. The battery can be coated according to different regional characteristics and regions by dividing the protective layer into the first region and the second region, so that the battery can protect the characteristics and the regions of different regions to improve the protection effect. The thickness of first region is greater than the thickness in second region in this battery, can strengthen the protective effect to the depressed part, avoids assembly or in the use, the protective layer on depressed part surface because of colliding with the inefficacy to can further promote protective effect.

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 a concave part, and the concave part is easy to collide; in addition, when a plurality of batteries are stacked, in two adjacent batteries, the electrode terminal of one battery protruding from the surface is easy to collide with the concave part of the adjacent battery, so that the protective layer is partially fallen off, and insulation failure is caused.

SUMMERY OF THE UTILITY MODEL

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

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

according to a first aspect of the present invention, there is provided a battery, comprising:

the battery shell is provided with a concave part which is inwards sunken from the outer surface of the battery shell;

the protective layer has insulating property and is coated on the outer surface of the battery shell; the protective layer includes a first region and a second region, wherein:

the first region covers at least a part of the recess, the second region covers the other part of the battery case, and the first region is thicker than the second region.

In the battery that this application provided, the protective layer coats in battery case's surface to insulating the protection to the structure of battery case inside, specifically, the first region covers the part of depressed part, even whole, and the second region covers the surface of other parts of battery case. It is worth noting that when forming the battery that this application provided, can set up first region according to the demand and be thicker than the second region to form better protection to the depressed part, avoid the protective layer on depressed part surface because of colliding with the emergence damage.

It should be noted that, according to the battery provided by the application, the protective layer is divided into the first area and the second area, and the protective layer can be coated according to different area characteristics and subareas, so that the characteristics and the subareas of different areas can be protected, and the insulation protection effect on the battery can be improved. Simultaneously, the thickness in first region is greater than the thickness in second region in the battery that this application provided, can strengthen the protective effect to the depressed part, avoids assembling or in the use, the protective layer on depressed part surface because of colliding with the inefficacy to can further promote the protective layer to the insulating protective effect of 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 that this application provided, protective layer in the battery coats in battery case's surface to insulating the protection to the structure of battery case inside, specifically, the first region covers the part of depressed part, even whole, and the second region covers the surface of other parts of battery case. It is worth noting that when forming the battery that this application provided, can set up first region according to the demand and be thicker than the second region to form better protection to the depressed part, avoid the protective layer on depressed part surface because of colliding with the emergence damage. .

It should be noted that, in the battery device provided by the present application, the battery can be coated according to different regional characteristics and regions by dividing the protective layer into the first region and the second region, so as to protect the battery according to the characteristics and the regions of different regions, thereby improving the insulation protection effect on the battery. Simultaneously, the thickness in first region is greater than the thickness in second region in the battery that this application provided, can strengthen the protective effect to the depressed part, avoids assembling or in the use, the protective layer on depressed part surface because of colliding with the inefficacy to can further promote the protective layer to the insulating protective effect of 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 in order 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 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 M of the battery case of fig. 2 after the battery case is coated with a protective layer.

The reference numerals are explained below:

100. a battery case; 110. a first housing; 111. a body portion; 112. a recessed portion; 120. a second housing; 200. a protective layer; 210. a first region; 220. a second region; s1, a first surface; s2, 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, and it is, therefore, to 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, reference to "the" object or "an" object is also intended to mean one of many such objects possible.

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 as a specific case by a person skilled in the art.

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 this context, when an element or feature is referred to as being "on", "under", or "inner", "outer" with respect to another element(s), it can be directly on "," under ", or" inner "," outer "with respect to the other element(s), or indirectly on", "under", or "inner", "outer" with respect to the other element(s) via 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 100 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 of the battery case 100 of fig. 2 at the plane M after the protective layer 200 is applied. As shown in fig. 1 to 3, the battery provided in the embodiment of the present application includes:

a battery case 100, the battery case 100 being provided with a depression 112 (exemplarily, a portion surrounded by a thick black line in fig. 2) depressed inward from an outer surface of the battery case 100;

a protective layer 200, the protective layer 200 having an insulating property, and the protective layer 200 being coated on an outer surface of the battery case 100; the protective layer 200 comprises a first region 210 and a second region 220, wherein:

the first region 210 covers at least a portion of the recess 112, the second region 220 covers the other portion of the battery case 100, and the first region 210 is thicker than the second region 220.

Specifically, in the battery provided in the embodiment of the present application, the protection layer 200 is applied to the outer surface of the battery case 100 to insulate and protect the internal structure of the battery case 100, specifically, the first region 210 covers part or even all of the recess 112, and the second region 220 covers the outer surface of other parts of the battery case 100. It is worth noting that when the battery provided by the embodiment of the present application is formed, the first region 210 may be set to be thicker than the second region 220 according to requirements, so as to form better protection for the recessed portion 112, and prevent the protection layer 200 on the surface of the recessed portion 112 from being damaged due to collision.

It should be noted that, in the battery provided in the embodiment of the present application, the protective layer 200 is divided into the first region 210 and the second region 220, and the protective layer may be applied according to different region characteristics and regions, so as to protect the battery against the characteristics and the regions of the different regions, thereby improving the insulation protection effect on the battery. Meanwhile, the thickness of the first region 210 in the battery provided by the embodiment of the application is greater than that of the second region 220, so that the protection effect on the concave part 112 can be enhanced, and the failure of the protection layer 200 on the surface of the concave part 112 due to collision in the assembling or using process is avoided, so that the insulation protection effect of the protection layer 200 on the battery can be further improved.

It should be noted that, when the protection layer 200 is disposed, the effect of the thickness of the first region 210 on the protection effect and the effect of the thickness of the second region 220 on the protection effect need to be considered to ensure the insulation protection effect of the protection layer 200 on the battery.

In one embodiment, the second region 220 has a size ranging from 70 μm to 130 μm in a thickness direction of the second region 220.

It should be noted that, since the second region 220 coats most of the surface of the battery case 100, the thickness of the second region 220 affects the overall size of the coated battery. On this basis, if the thickness of the second region 220 is too large, the overall size of the protection layer 200 may be too thick, which may affect the arrangement of the plurality of cells in the cell device, and may decrease the space utilization rate in the cell device; if the thickness of the second region 220 is too small, the protective layer 200 may not effectively protect the battery case 100.

Therefore, when the thickness of the second region 220 is set to be in the range of 70 μm to 130 μm, the above-mentioned problems can be well balanced. Illustratively, the thickness of the second region 220 may be selected to be any one of the following values:

70μm、72μm、74μm、76μm、78μm、80μm、82μm、84μm、86μm、88μm、90μm、92μm、94μm、96μm、98μm、100μm、102μm、104μm、106μm、108μm、110μm、112μm、114μm、116μm、118μm、120μm、122μm、124μm、126μm、128μm、130μm。

when the first region 210 is prepared, the thickness of the first region 210 needs to be controlled to be larger than that of the second region 220, so as to optimize the insulation protection effect of the protection layer 200 on the battery. In one embodiment, there may be provided: the ratio of the thickness of the first region 210 to the thickness of the second region 220 ranges from 1.2 to 2.

It should be noted that if the setting ratio is too large, the thickness of the first region 210 is too thick, and the coating is liable to fall off from the surface of the recess 112, and meanwhile, since the coating on the surface of the recess 112 is thick, the occupied space is large, and the arrangement of other devices in the battery pack is affected; if the setting ratio is small, the thickness of the first region 210 is too thin, so that the protection layer 200 cannot effectively play a protection role at the recess 112, and is very easy to fail due to collision. Thus, when setting: when the ratio of the size of the first region 210 to the size of the second region 220 along the thickness direction of the protection layer 200 is in the range of 1.2 to 2, the above two problems can be well balanced.

Illustratively, the ratio of the size of the first region 210 to the size of the second region 220 in the thickness direction of the protection layer 200 may be selected to be any one of the following values:

1.2、1.21、1.22、1.23、1.24、1.25、1.26、1.27、1.28、1.29、1.3、1.31、1.32、1.33、1.34、1.35、1.36、1.37、1.38、1.39、1.4、1.41、1.42、1.43、1.44、1.45、1.46、1.47、1.48、1.49、1.5、1.51、1.52、1.53、1.54、1.55、1.56、1.57、1.58、1.59、1.6、1.61、1.62、1.63、1.64、1.65、1.66、1.67、1.68、1.69、1.7、1.71、1.72、1.73、1.74、1.75、1.76、1.77、1.78、1.79、1.8、1.81、1.82、1.83、1.84、1.85、1.86、1.87、1.88、1.89、1.9、1.91、1.92、1.93、1.94、1.95、1.96、1.97、1.98、2。

when the first region 210 is specifically configured, there are many possibilities of the structure of the first region 210, and at least one of the following structures is provided.

In one embodiment, the first region 210 has a single-layer structure along the thickness direction of the first region 210.

Since the first region 210 has a single-layer structure, the first region 210 can be formed in one step by a manufacturing process. Obviously, the structure can simplify the preparation process and improve the preparation efficiency.

Specifically, when the first region 210 and the second region 220 are formed, one of the first region 210 and the second region 220 may be formed first, and then the other may be formed. For example, taking the second region 220 as an example of being prepared first, a protective material may be coated or sprayed on the region of the battery case 100 except the recess 112 to form the second region 220. It is noted that in the process of forming the second region 220, the first region 210 is not formed on the recess 112, and then the first region 210 is separately formed to form the structure shown in fig. 3.

Of course, different devices may be used to prepare the first region 210 and the second region 220 at the same time, which is not described herein again.

It is to be understood that the wrapping form of the first region 210 and the second region 220 at the outer surface of the battery case 100 is not limited to the structure shown in fig. 3, for example, the first region 210 may be transitionally connected with the second region 220 at the intersection with the second region 220, or may be beyond the second region 220 in the thickness direction.

When the first region 210 and the second region 220 are in transition connection, the thickness of the intersection of the first region 210 may be equal to the thickness of the second region 220, and may be specifically set according to requirements, which is not described herein again.

In one embodiment, the first region 210 includes a plurality of coating sublayers disposed one on top of another along a thickness direction of the first region 210.

It should be noted that, since the plurality of coating sublayers are disposed in the first region 210, the coating effect of the first region 210 can be improved, so as to improve the insulating protection effect of the protection layer 200 on the battery.

It is understood that "plurality" means at least two; if the materials of the plurality of coating sublayers are the same, the boundaries between the coating sublayers in the first region 210 may not be visually observed in appearance, and details thereof are not described herein.

In particular, when the first region 210 is prepared, at least one of the plurality of coating sublayers may be made of the same material as the second region 220, so as to further simplify the preparation process.

For a clearer understanding of the preparation process of the protection layer 200, the first region 210 including two coating sublayers is schematically illustrated, and the following details are provided:

a coating sublayer in the first region 210 is prepared; thereafter, the second region 220 is prepared and another coating sublayer of the first region 210 is simultaneously formed. It is noted that the newly prepared coating sublayer would cover the coating sublayer prepared in the previous step, and both coating sublayers eventually form the first region 210.

Notably, the thickness of the second region 220 is the same as the thickness of the coating sublayer prepared in parallel therewith. Illustratively, provided that the thickness of the second region 220 is 80 μm, the thickness of the coating sub-layer prepared in synchronization therewith is also 80 μm. Meanwhile, the thickness of the first region 210 is the sum of the thicknesses of the coating sublayers, illustratively, the thickness of the first coating sublayer is 40 μm, the thickness of the second coating sublayer is 80 μm, and the thickness of the first region 210 is 120 μm.

It should be understood that in the above operation, the material of the second region 220 and the coating sublayer formed simultaneously therewith is the same, and the material of the second region 220 and the coating sublayer formed in the previous step may be the same or different.

Of course, other ways of forming the protective layer 200 may also be used. Illustratively, the outer surface of the battery case 100 is integrally sprayed to form the second region 220 and a coating sublayer; after the recesses 112 are individually sprayed, a new coating sublayer is formed, and the first region 210 is formed by two coating sublayers.

It is noted that there are many possibilities for the structure of the battery case 100 in the embodiment of the present application, at least one of the following structures.

In one embodiment, the battery case 100 includes a first case 110 and a second case 120, wherein the first case 110 includes a body part 111, and the body part 111 has an opening; the second shell 120 is buckled with the opening;

the first housing 110 further includes a recessed portion 112, the recessed portion 112 is located on a side of the main body 111 facing away from the opening, and the recessed portion 112 is located at an end portion of the first housing 110;

the first region 210 covers the recess 112, and the second region 220 covers the other portions of the battery case 100.

It should be noted that, in the battery provided in the embodiment of the present application, by providing the first region 210 and the second region 220, the regional coating may be performed according to different regional characteristics, so as to improve the insulation protection effect on the battery. Simultaneously, the thickness of first region 210 is greater than the thickness of second region 220 in the battery that this application embodiment provided, can strengthen the holistic protective effect to depressed part 112, avoids assembly or in the use, the protective layer 200 on depressed part 112 surface because of colliding with the inefficacy to can further promote the insulating protective effect of protective layer 200 to the battery.

It should be noted that the cell, the electrolyte, and the like are disposed in the cavity formed by the first casing 110, and detailed description thereof is omitted. In a specific configuration, the material of the second casing 120 may be aluminum.

In a specific embodiment, with continued reference to the structures shown in fig. 1 to fig. 3, the outer surface of the battery case 100 includes two first surfaces S1 disposed opposite to each other and four second surfaces S2 disposed around the first surfaces S1, wherein the area of the second surfaces S2 is smaller than that of the first surfaces S1; the first case 110 forms one first surface S1 and four second surfaces S2, and the second case 120 forms the other first surface S1;

the recess 112 is located on the first surface S1 of the first housing 110.

Illustratively, as shown in fig. 1, the battery case 100 may have a substantially rectangular parallelepiped shape. Specifically, the area of the first surface S1 may be larger than that of the second surface S2, forming a large surface of the battery; every two second surfaces S2 of the four second surfaces S2 are oppositely arranged; and of the four second surfaces S2, two second surfaces S2 have a larger area, and two second surfaces S2 have a smaller area.

It should be noted that when the battery is placed, one second surface S2 with a larger area may be used as the bottom surface of the battery, and correspondingly, the other second surface S2 with a larger area may be used as the top surface of the battery. Meanwhile, the other two second surfaces S2 having smaller areas form the sides of the battery. Illustratively, the two second surfaces S2 with larger area are arranged along the width direction, and the two second surfaces S2 with smaller area are arranged along the length direction.

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

It is noted that a cell is provided in the battery case 100, and the cell is connected to each electrode terminal.

It is understood that each cell includes an electrode terminal of a first polarity and an electrode terminal 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, the surface of the battery casing 100 may be provided with one electrode terminal (pole) protruding from the surface, or may be provided with two electrode terminals (poles) protruding from the surface of the casing, and these two electrode terminals may be specifically set as required, which is not described herein again.

When a plurality of cells are stacked, the first case 110 of the latter cell is opposite to the second case 120 of the former cell, and at least a portion of the electrode terminal of one cell among the adjacent two cells is disposed in the recess 112 of the other cell.

It should be noted that, since the thickness of the first region 210 coated on the surface of the recessed portion 112 is relatively thick, the occurrence of insulation failure caused by the pole colliding with the recessed portion 112 by mistake can be avoided, and thus, the safety performance of the battery can be improved.

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 protective layer 200 inside the battery is coated on the outer surface of the battery case 100 to perform insulation protection on the structure inside the battery case 100, specifically, the first region 210 covers part or even all of the recess 112, and the second region 220 covers the outer surface of other parts of the battery case 100. It is worth noting that when the battery provided by the embodiment of the application is formed, the first area 210 can be thicker than the second area 220 according to requirements, so that the depressed part 112 can be protected better, and the protection layer 200 on the surface of the depressed part 112 can be prevented from being damaged due to collision.

It should be noted that, in the battery device provided in the embodiment of the present application, the battery may be coated according to different regional characteristics and regions by dividing the protection layer 200 into the first region 210 and the second region 220, so as to protect the battery against the characteristics and the regions of different regions, thereby improving the insulation protection effect on the battery. Meanwhile, the thickness of the first region 210 in the battery provided by the embodiment of the application is greater than that of the second region 220, so that the protection effect on the concave part 112 can be enhanced, and the failure of the protection layer 200 on the surface of the concave part 112 due to collision in the assembling or using process is avoided, so that the insulation protection effect of the protection layer 200 on the battery can be further improved.

In one embodiment, the number of the cells is plural, each cell includes a first case 110 and a second case 120, and the first case 110 includes a recess 112, the second case 120 is provided with an electrode terminal along the arrangement direction of the first case 110 and the second case 120 in the cell, the plural cells are stacked, and at least a portion of the electrode terminal of one cell is placed in the recess 112 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 recess 112 of another cell, the size of the plurality of cells in the thickness direction after stacking can be reduced, thereby facilitating the improvement of the space utilization rate in the battery device.

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 in 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 that have been 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:

the battery shell is provided with a concave part which is inwards concave from the outer surface of the battery shell;

the protective layer has insulating property and is coated on the outer surface of the battery shell; the protective layer includes a first region and a second region, wherein:

the first region covers at least a part of the recess, the second region covers the other part of the battery case, and the first region is thicker than the second region.

2. The battery according to claim 1, wherein the second region has a size ranging from 70 μm to 130 μm in a thickness direction of the second region.

3. The battery according to claim 2, wherein a ratio of a size of the first region to a size of the second region in a thickness direction of the protective layer is in a range of 1.2 to 2.

4. The battery according to claim 3, wherein the first region has a single-layer structure in a thickness direction of the first region.

5. The battery of claim 3, wherein the first region comprises a plurality of coating sublayers arranged in a stack along a thickness direction of the first region.

6. The battery according to any one of claims 1 to 5,

the battery case includes a first case and a second case, wherein the first case includes a body portion having an opening; the second shell is buckled with the opening;

the first shell further comprises the recessed part, the recessed part is positioned on one side, away from the opening, of the body part, and the recessed part is positioned at the end part of the first shell;

the first region covers the recess, and the second region covers the other part of the battery case.

7. A battery device comprising a battery according to any one of claims 1 to 6.

8. The battery device according to claim 7, wherein the number of the batteries is plural, each of the batteries includes a first case and a second case, and the first case includes the recess, and the second case is provided with an electrode terminal;

the plurality of the batteries are stacked along the arrangement direction of the first shell and the second shell in the batteries, and at least part of the electrode terminal of one battery is arranged in the concave part of the other battery in two adjacent batteries.

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