CN215070161U - Battery cover plate and battery - Google Patents

Abstract

The utility model relates to the technical field of batteries, in particular to a battery cover plate and a battery, wherein the battery cover plate comprises a cover plate body, the cover plate body is provided with a reinforcing part, the reinforcing part forms a recess on the surface of one side of the cover plate body, and forms a bulge with a corresponding shape on the surface of the other side of the cover plate body; along the first direction that is on a parallel with apron body surface, the degree of depth of sunken center to both ends is gradually reduced, and the height of protruding center to both ends is gradually reduced. Through the structure design, the utility model discloses can utilize the rib of sunken degree of depth or protruding high gradual change, promote the anti deformability of apron body, guarantee the stable function of the relevant structure of battery apron, reduce the use risk of battery by a wide margin.

Description

Battery cover plate and battery

Technical Field

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

Background

The existing battery cover plate is usually provided with components such as a pole through hole, a liquid injection hole, an explosion-proof sheet mounting hole and the like. However, the existing battery cover plate has the following defects: when the size of the battery cover plate is large, the battery cover plate is easy to deform in the using process, so that the function of a related structural part is invalid, for example, the opening pressure of an explosion-proof valve is abnormal, the explosion-proof valve cannot be normally opened, and the use risk of the battery is increased.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to overcome at least one of the above-mentioned drawbacks of the prior art, and to provide a battery cover plate with high deformation resistance.

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

according to an aspect of the present invention, there is provided a battery cover plate, wherein the battery cover plate comprises a cover plate body, the cover plate body has a reinforcing portion, the reinforcing portion forms a recess on one side surface of the cover plate body, and forms a protrusion with a corresponding shape on the other side surface of the cover plate body; the depth from the center of the recess to the two ends of the cover plate body is gradually reduced, and the height from the center of the protrusion to the two ends of the cover plate body is gradually reduced along a first direction parallel to the surface of the cover plate body.

According to the above technical scheme, the utility model provides an advantage and positive effect of battery apron lie in:

the utility model provides a battery cover plate, its apron body have the rib, and the rib forms the sunken in the arch that the shape corresponds respectively in apron body both sides surface, and sunken center reduces to the degree of depth at both ends gradually, and the height at protruding center to both ends reduces gradually. Through the structure design, the utility model discloses can utilize the rib of sunken degree of depth or protruding high gradual change, promote the anti deformability of apron body, guarantee the stable function of the relevant structure of battery apron, reduce the use risk of battery by a wide margin.

Another main objective of the present invention is to overcome at least one of the above-mentioned drawbacks of the prior art, and to provide a battery with a cover plate that is not easily deformed and has a smaller use risk.

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

according to an aspect of the present invention, a battery is provided, wherein the battery comprises the present invention provides a battery cover plate.

According to the above technical scheme, the utility model provides an advantage and positive effect of battery lie in:

the utility model provides a battery, through adopting the utility model provides a battery cover plate can utilize the stronger battery cover plate of anti deformability to guarantee the stable function of relevant structure to reduce the use risk.

Drawings

The various objects, features and advantages of the present invention will become more apparent from the following detailed description of the preferred embodiments of the invention, when considered in conjunction with the accompanying drawings. The drawings are merely exemplary of the invention and are not necessarily drawn to scale. In the drawings, like reference characters designate the same or similar parts throughout the different views. Wherein:

FIG. 1 is a perspective view of a battery cover plate shown in accordance with an exemplary embodiment;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a perspective cross-sectional view taken along line B-B of FIG. 1;

FIG. 4 is a perspective view of a battery cover plate according to another exemplary embodiment;

FIG. 5 is a cross-sectional view taken along line C-C of FIG. 4;

fig. 6 is a partial cross-sectional view of a battery cover plate according to another exemplary embodiment.

The reference numerals are explained below:

100. a battery cover plate;

110. a cover plate body;

120. a reinforcing portion;

121. recessing;

122. a protrusion;

D. thickness;

H1. depth;

H2. depth;

l1, long side;

l2, short side;

o, position;

p. position;

s1, outer surface;

s2, inner surface;

x. a first direction;

y. a second direction.

Detailed Description

Exemplary embodiments that embody features and advantages of the invention are described in detail below. It is to be understood that the invention is capable of other and different embodiments and its several details are capable of modification without departing from the scope of the invention, and that the description and drawings are to be regarded as illustrative in nature and not as restrictive.

In the following description of various exemplary embodiments of the invention, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration various exemplary structures, systems, and steps in which aspects of the invention may be practiced. It is to be understood that other specific arrangements of parts, structures, example devices, systems, and steps may be utilized, and structural and functional modifications may be made without departing from the scope of the present invention. Moreover, although the terms "over," "between," "within," and the like may be used in this specification to describe various example features and elements of the invention, these terms are used herein for convenience only, e.g., in accordance with the orientation of the examples described in the figures. Nothing in this specification should be construed as requiring a specific three dimensional orientation of structures to fall within the scope of the invention.

Battery cover plate embodiment one

Referring to fig. 1, a perspective view of a battery cover plate 100 according to the present invention is representatively illustrated. In the exemplary embodiment, the battery cover 100 of the present invention is illustrated by taking a cover assembly applied to a lithium battery as an example. Those skilled in the art will readily appreciate that various modifications, additions, substitutions, deletions, or other changes may be made to the specific embodiments described below in order to apply the inventive concepts described herein to other types of batteries, and such changes are within the scope of the principles of the disclosed battery cover plate 100.

As shown in fig. 1, in the present embodiment, the battery cover 100 of the present invention is used to be disposed on a battery, and the battery cover 100 includes a cover body 110. Referring to fig. 2 and 3 in combination, fig. 2 representatively illustrates a cross-sectional view taken along line a-a of fig. 1; representatively illustrated in fig. 3 is a perspective cross-sectional view taken along line B-B of fig. 1. The structure, connection and functional relationship of the main components of the battery cover plate 100 according to the present invention will be described in detail with reference to the above drawings.

As shown in fig. 1 to 3, in the present embodiment, the cover plate body 110 has a reinforcing portion 120, the reinforcing portion 120 forms a recess 121 on one side surface of the cover plate body 110, and the reinforcing portion 120 forms a protrusion 122 on the other side surface of the cover plate body 110. In the first direction X parallel to the surface of the cover plate body 110, the depth from the center of the recess 121 to the two ends is gradually decreased, and the height from the center of the protrusion 122 to the two ends is gradually decreased. Specifically, a reference plane is defined, which is perpendicular to the cover body 110 and parallel to the first direction X, and on the basis, the depth of the center of the orthographic projection of the recess 121 on the reference plane to the surface of one side of the cover body 110 at both ends is gradually decreased, and the height of the center of the orthographic projection of the protrusion 122 on the reference plane to the surface of the other side of the cover body 110 at both ends is gradually decreased. Through the structure design, the utility model discloses can utilize the reinforcement 120 of sunken 121 degree of depth or the high gradual change of protruding 122, promote the anti deformability of apron body 110, guarantee the stable function of the relevant structure of battery apron 100, reduce the use risk of battery by a wide margin.

In the description of the present specification, the "depth" of the recess 121 refers to a surface of one side of the cover plate body 110, the concave depth of the recess 121 with respect to the surface, and the "height" of the protrusion 122 refers to a convex height of the protrusion 122 with respect to the surface of the other side of the cover plate body 110.

Alternatively, as shown in fig. 3, in the present embodiment, along a second direction Y parallel to the surface of the cap body 110 and perpendicular to the first direction X, the depths of the positions of the recesses 121 may be all equal, and the heights of the positions of the protrusions 122 may be all equal. Accordingly, the surface of the recess 121 or the protrusion 122 can be roughly regarded as a partial surface of the pillar-shaped structure.

Further, as shown in fig. 2, based on the structural design that the depth of each position of the recess 121 along the second direction Y is equal, in the present embodiment, the cross section of the recess 121 along the first direction X may be substantially arc-shaped. Correspondingly, based on the structural design that the heights of the positions of the protrusion 122 along the second direction Y are equal, the cross section of the protrusion 122 along the first direction X may also be substantially arc-shaped.

Further, based on the structural design that the cross section of the recess 121 along the first direction X is arc-shaped, in the present embodiment, for the specific structural design of the reinforcing part 120 that the cross section of the recess 121 is arc-shaped, the specific shapes of the recess 121 and the protrusion 122 of the reinforcing part 120 can be correspondingly designed according to the shape of the actual bending moment curve by analyzing the bending moment of the cover plate body 110, so that the shapes of the recess 121 and the protrusion 122 of the reinforcing part 120 are the same as or similar to the shape of the bending moment curve of the stress, thereby maximally improving the deformation resistance of the battery cover plate 100.

As shown in fig. 2, in the present embodiment, the depth of the center position of the recess 121 to both ends is gradually decreased, and the height of the center position of the protrusion 122 to both ends is gradually decreased along the first direction X. For example, the position O shown in fig. 2 is defined as the central position of the recess 121 and the protrusion 122 along the first direction X, and any position P near both ends of the position O along the first direction X is selected, wherein the depth H1 of the recess 121 at the position O is greater than the depth H2 thereof at the position P, and the height of the protrusion 122 at the position O is greater than the height thereof at the position P. Through the above structural design, in the first direction X, the depth change of the recess 121 and the height change of the protrusion 122 of the reinforcing part 120 present a gradually decreasing change shape with the maximum central position being bilaterally symmetrical, so that the deformation resistance provided by the reinforcing part 120 for the cover plate body 110 is more balanced.

Alternatively, as shown in fig. 1 to 3, in the present embodiment, the depth of the recess 121 from the middle to both ends thereof is gradually decreased to 0 along the first direction X, in other words, the end of the recess 121 along the first direction X is directly connected with the rest of the cap body 110, i.e., the depth of the end of the recess 121 is 0. Correspondingly, the height of the middle part to both ends of the protrusion 122 is gradually reduced to 0 along the first direction X, in other words, the end part of the protrusion 122 along the first direction X is directly connected with the rest part of the cover plate body 110, i.e. the depth of the end part of the protrusion 122 is 0.

As shown in fig. 1 to 3, based on the design of the present embodiment that the depth of each position of the recess 121 along the second direction Y is equal, two ends of the recess 121 along the second direction Y are connected to the rest of the cover plate body 110 through structures such as sidewalls. Correspondingly, according to the present embodiment, the two ends of the protrusion 122 along the second direction Y are connected to the rest of the cover plate body 110 through, for example, the side wall, based on the structure design that the depths of the positions of the protrusion 122 along the second direction Y are all equal.

Alternatively, as shown in fig. 2, in the present embodiment, edges of both ends of the recess 121 in the first direction X may smoothly transition to one side surface of the cap body 110, and correspondingly, edges of both ends of the protrusion 122 in the first direction X may smoothly transition to one side surface of the cap body 110. The connection relationship of the smooth transition can be realized by, but not limited to, a curved surface transition structure.

Alternatively, as shown in fig. 2, in the present embodiment, taking a structure that the depth of the recess 121 decreases from the center position to both ends along the first direction X as an example, the ratio of the maximum depth of the recess 121, i.e., the depth H1 of the recess 121 at the position O, to the thickness D of the cover plate body 110 may be 1:3 to 3:1, for example, 1:3, 1:2, 1:1, 3:1, and the like. Correspondingly, taking the structure design that the height of the protrusion 122 gradually decreases from the center position to both ends along the first direction X as an example, the ratio of the maximum height of the protrusion 122, i.e., the height of the protrusion 122 at the position O, to the thickness D of the cover plate body 110 may be 1:3 to 3:1, for example, 1:3, 1:2, 1:1, 3:1, and the like. In other embodiments, the ratio of the maximum depth of the recess 121 to the thickness D of the cover plate body 110 may also be less than 1:3, or may be greater than 3:1, such as 1:5, 1:4, 4:1, and the like, and correspondingly, the ratio of the maximum height of the protrusion 122 to the thickness D of the cover plate body 110 may also be less than 1:3, or may be greater than 3:1, such as 1:5, 1:4, 4:1, and the like, which are not limited by this embodiment. Through the structure design, the utility model discloses a sunken 121 the degree of depth and protruding 122 height (being equivalent to the depth or the height of additional strengthening structure) provide a better value scope for when strengthening the anti deformability of battery apron 100 through additional strengthening structure, can not lead to the battery whole height too high (when protruding 122 is located the surface S1 of apron body 110) or produce the interference with parts such as the inside electric core of battery because of protruding 122 highly too high (when protruding 122 is located the internal surface S2 of apron body 110).

Alternatively, as shown in fig. 1 to 3, in the present embodiment, the battery cover 100 has an inner surface S2 facing the battery and an outer surface S1 facing away from the battery when provided to the battery. On the basis, the reinforcement part 120 of the cover plate body 110 may form a recess 121 on the outer surface S1 and a protrusion 122 on the inner surface S2. Through the above structural design, the protrusion 122 of the reinforcement part 120 is accommodated in the inner space of the battery cover plate 100 after being combined with the battery, and does not protrude out of the combined battery, so that the external height of the battery can be ensured not to be increased due to the reinforcement part 120 arranged on the battery cover plate 100, which is beneficial to the improvement of the energy density of the battery.

Alternatively, as shown in fig. 1, in the present embodiment, the cap body 110 of the battery cap plate 100 may be substantially rectangular, and the cap body 110 has a long side L1 and a short side L2. On this basis, the first direction X may be parallel to the short side L2 of the cover body 110. In other embodiments, the first direction X may be parallel to the long side L1 of the cover body 110. Alternatively, the first direction X may be any other direction parallel to the surface of the cover plate body 110, which is not limited in this embodiment.

Alternatively, in the present embodiment, the reinforcement part 120 may be stamped and formed from a partial structure of the cover body 110. Accordingly, for the part of the conventional battery cover plate 100 provided with the reinforcing structure, the reinforcing structure includes the boss or the groove, however, the improvement of the deformation resistance of the cover plate by such a reinforcing structure is limited, the processing is difficult, and metal chips are easily generated at the right angle position where the boss or the groove is formed. Therefore, the utility model discloses a stamping process forms rib 120, and processing is simple, and can guarantee at least that rib 120 can not produce the right angle structure along the both ends of first direction X and the surface of apron body 110 to difficult production metal fillings.

Alternatively, in the present embodiment, the thicknesses of the respective positions of the reinforcing part 120 may be equal. In other words, the thickness of the reinforcing part 120 from the center to both ends is constant along the first direction X, that is, the depth of the recess 121 from the center to any position of both ends has the same tendency as the height of the protrusion 122 from the center to the opposite position of both ends.

Battery cover plate embodiment two

Based on the above detailed description of the first embodiment of the present invention, a second embodiment of the battery cover 100 will be described below with reference to fig. 4 and 5. As shown in fig. 4 and 5, fig. 4 representatively illustrates a perspective view of a battery cover plate 100 in a second embodiment in accordance with the present invention; a cross-sectional view taken along line C-C of fig. 4 is representatively illustrated in fig. 5. The structural design of the battery cover plate 100 according to the present invention, which is different from other embodiments in the second embodiment, will be described below with reference to the above drawings.

As shown in fig. 4 and 5, in the present embodiment, a cross section of the recess 121 of the reinforcing part 120 along the first direction X may be substantially triangular, specifically, isosceles triangular. Correspondingly, the cross section of the protrusion 122 of the reinforcing portion 120 along the first direction X may also be substantially triangular, specifically, isosceles triangular. On this basis, the vertex of the corresponding triangle of the recess 121 is the center thereof, i.e. the position of the maximum depth of the recess 121. Correspondingly, the vertex of the corresponding triangle of the protrusion 122 is the center thereof, i.e. the maximum height position of the protrusion 122. In other embodiments, the depth of the recess 121 and the height of the protrusion 122 are not limited to only along the first direction X, for example, along any direction parallel to the surface of the cover plate body 110, the depth of the recess 121 of the reinforcing portion 120 from the center to both ends may be gradually decreased, and the height of the protrusion 122 from the center to both ends may be gradually decreased, on the basis, the cross section of the recess 121 along any direction parallel to the surface of the cover plate body 110 may be substantially circular arc, that is, the reinforcing portion 120 may be a spherical shell structure as a whole.

Battery cover plate embodiment three

Based on the above detailed description of the first and second embodiments of the present invention, a third embodiment of the battery cover 100 will be described below with reference to fig. 6. As shown in fig. 6, fig. 6 representatively illustrates a partial cross-sectional view of a battery cover plate 100 in a third embodiment, and particularly, the cross-sectional view of fig. 2 or fig. 5 can be referred to. The structural design of the battery cover plate 100 according to the present invention, which is different from other embodiments in the third embodiment, will be described below with reference to the above drawings.

As shown in fig. 6, unlike the first and second embodiments in which the thicknesses of the reinforcing part 120 at the respective positions are substantially equal, in the present embodiment, the thickness of the reinforcing part 120 from the center to both ends may be gradually decreased in the first direction X. In other embodiments, the thickness of the reinforcing portion 120 from the center to both ends thereof may also increase along the first direction X, and is not limited to this embodiment.

It should be noted herein that the battery cover plates shown in the drawings and described in the present specification are but a few examples of the many types of battery cover plates that the principles of the present invention can be employed. It should be clearly understood that the principles of the present invention are by no means limited to any details or any components of the battery cover plate shown in the drawings or described in the present specification.

To sum up, the utility model provides a battery cover plate, its apron body have the rib, and the rib forms the sunken in the arch that the shape corresponds respectively in apron body both sides surface, and sunken center is to the degree of depth at both ends and is reduced gradually, and the height at protruding center to both ends is reduced gradually. Through the structure design, the utility model discloses can utilize the rib of sunken degree of depth or protruding high gradual change, promote the anti deformability of apron body, guarantee the stable function of the relevant structure of battery apron, reduce the use risk of battery by a wide margin.

Battery embodiments

Based on the above detailed description of several exemplary embodiments of the battery cover plate provided by the present invention, the following description will be made of exemplary embodiments of the battery provided by the present invention.

In this embodiment, the battery provided by the present invention includes the battery cover plate provided by the present invention and described in detail in the above embodiments.

To sum up, the utility model provides a battery, through adopting the utility model provides a battery cover plate can utilize the battery cover plate that the resistance to deformation ability is stronger to guarantee the stable function of relevant structure to reduce the use risk.

It should be noted herein that the batteries shown in the drawings and described in the present specification are but a few examples of the many types of batteries that the principles of the present invention can be employed in. It should be clearly understood that the principles of the present invention are in no way limited to any details or any components of the battery shown in the drawings or described in the specification.

Exemplary embodiments of a battery cover and a battery according to the present invention are described and/or illustrated in detail above. Embodiments of the invention are not limited to the specific embodiments described herein, but rather, components and/or steps of each embodiment may be utilized independently and separately from other components and/or steps described herein. Each component and/or step of one embodiment can also be used in combination with other components and/or steps of other embodiments. When introducing elements/components/etc. described and/or illustrated herein, the articles "a," "an," and "the" are intended to mean that there are one or more of the elements/components/etc. The terms "comprising," "including," and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc. Furthermore, the terms "first" and "second" and the like in the claims and the description are used merely as labels, and are not numerical limitations of their objects.

While the present invention has been described in terms of various specific embodiments, those skilled in the art will recognize that the invention can be practiced with modification within the spirit and scope of the claims.

Claims (10)

1. A battery cover plate is characterized by comprising a cover plate body, wherein the cover plate body is provided with a reinforcing part, the reinforcing part forms a recess on the surface of one side of the cover plate body, and forms a protrusion on the surface of the other side of the cover plate body; the depth from the center of the recess to the two ends of the cover plate body is gradually reduced, and the height from the center of the protrusion to the two ends of the cover plate body is gradually reduced along a first direction parallel to the surface of the cover plate body.

2. The battery cover plate according to claim 1, wherein the recesses are equal in depth at each position and the protrusions are equal in height at each position in a second direction parallel to the surface of the cover plate body and perpendicular to the first direction.

3. The battery cap plate according to claim 2, wherein the depression has an arc shape or a triangular shape in cross section in the first direction.

4. The battery cover plate according to claim 1, wherein the depth of the depressed center to both ends is gradually decreased and the height of the protruded center to both ends is gradually decreased in any direction parallel to the surface of the cover plate body.

5. The battery cap plate according to claim 4, wherein the depression has a circular arc shape in a cross section in any direction parallel to the surface of the cap body.

6. The battery cap plate according to claim 1, wherein the depressed edge is smoothly transitioned with one side surface of the cap plate body, and the protruded edge is smoothly transitioned with the other side surface of the cap plate body.

7. The battery cover plate according to claim 1, wherein a ratio of a maximum depth of the depression to a thickness of the cover plate body is 1:3 to 3: 1.

8. The battery cover plate according to claim 1, wherein the battery cover plate has an inner surface facing the battery and an outer surface facing away from the battery when disposed on the battery; wherein the reinforcing part forms the recess on the outer surface and forms the protrusion on the inner surface.

9. The battery cover plate according to claim 1, wherein the battery cover plate has a rectangular shape and has long sides and short sides; wherein the first direction is parallel to the long side or the short side.

10. A battery comprising the battery cover plate according to any one of claims 1 to 9.

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