CN218632346U - Battery case and battery - Google Patents

Abstract

The utility model relates to a battery technology field, the utility model provides a battery shell and battery, battery shell includes shell and blast resistant construction, blast resistant construction's at least part and shell formula structure as an organic whole, blast resistant construction is located the first surface of shell, along same direction, distance between the edge of blast resistant construction and first surface and the distance between two edges that first surface is relative than or equal to 0.05, when guaranteeing that blast resistant construction has reliable explosion-proof performance, can guarantee that blast resistant construction can and the first surface between the edge have certain distance value, can avoid blast resistant construction to influence the structural strength of shell, guarantee from this that the shell has reliable structural strength, thereby improve battery shell's safety and use performance.

Description

Battery case and battery

Technical Field

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

Background

In the correlation technique, when the internal pressure of battery reaches a certain height, explosion-proof structure can explode to realize the inside quick pressure release of battery. However, due to the limited installation position of the explosion proof structure, the explosion proof structure may affect the structural strength of the battery case in some cases.

SUMMERY OF THE UTILITY MODEL

The utility model provides a battery shell and battery to improve battery shell's performance.

According to the utility model discloses a first aspect provides a battery shell, including shell and explosion-proof structure, explosion-proof structure's at least part and shell structure as an organic whole, explosion-proof structure are located the first surface of shell, along same direction, and the distance between the edge of explosion-proof structure and first surface and the distance between two relative edges of first surface than equal to 0.05.

The utility model discloses battery case includes shell and blast resistant construction, blast resistant construction's at least part and shell be integrated into one piece formula structure, blast resistant construction is located the first surface of shell, through making along same direction, the distance between the edge of blast resistant construction and first surface and the distance between two edges that the first surface is relative than being equal to or greater than 0.05, when guaranteeing that blast resistant construction has reliable explosion-proof can, can guarantee that blast resistant construction can and the edge of first surface between have certain distance value, can avoid blast resistant construction to influence the structural strength of shell, guarantee from this that the shell has reliable structural strength, thereby improve battery case's safety in utilization performance.

According to a second aspect of the present invention, a battery is provided, which includes the above battery case.

The utility model discloses the battery includes battery case, battery case includes shell and explosion-proof structure, explosion-proof structure's at least part and shell formula structure as an organic whole, explosion-proof structure is located the first surface of shell, through making on the same direction of edge, the distance between the edge of explosion-proof structure and first surface and the distance between two edges that the first surface is relative than or equal to 0.05, when guaranteeing that explosion-proof structure has reliable explosion-proof performance, can guarantee that explosion-proof structure can and the edge of first surface between have certain distance value, can avoid explosion-proof structure to influence the structural strength of shell, guarantee from this that the shell has reliable structural strength, thereby improve battery case's safe handling performance.

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 structural view of a perspective of a battery housing shown in accordance with an exemplary embodiment;

FIG. 2 is a schematic diagram illustrating another perspective of a battery housing according to an exemplary embodiment;

fig. 3 is a schematic structural cross-sectional view illustrating a structure of a battery case according to an exemplary embodiment.

The reference numerals are explained below:

10. a housing; 11. a first surface; 111. a first outer edge; 112. a second outer edge; 12. a cover plate; 13. a housing member; 14. a liquid injection hole; 15. a second surface; 16. a third surface; 17. a fourth surface; 20. an explosion-proof structure; 30. pole structure.

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 explicitly specified or limited otherwise, the terms "first", "second", and the like 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 unless otherwise stated or indicated, and for example, "connected" may be 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 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.

An embodiment of the utility model provides a battery case, please refer to fig. 1 to fig. 3, battery case includes shell 10 and explosion-proof structure 20, and at least part and shell 10 of explosion-proof structure 20 are the integrated into one piece formula structure, and explosion-proof structure 20 is located shell 10's first surface 11, and along same direction, the ratio of the distance between the edge of explosion-proof structure 20 and first surface 11 and the distance between two relative edges of first surface 11 is more than or equal to 0.05.

The utility model discloses a battery case of embodiment includes shell 10 and explosion-proof structure 20, at least part and shell 10 of explosion-proof structure 20 are the integrated into one piece formula structure, explosion-proof structure 20 is located shell 10's first surface 11, through making along same direction, the distance between the edge of explosion-proof structure 20 and first surface 11 and the distance between two relative edges of first surface 11 than is more than or equal to 0.05, when guaranteeing that explosion-proof structure 20 has reliable explosion-proof performance, can guarantee that explosion-proof structure 20 can and have certain distance value between the edge of first surface 11, can avoid explosion-proof structure 20 to influence the structural strength of shell 10, guarantee from this that shell 10 has reliable structural strength, thereby improve battery case's safety performance.

It should be noted that the explosion-proof structure 20 is arranged on the housing 10, and after the internal pressure of the housing 10 of the explosion-proof structure 20 reaches a certain height, the explosion-proof structure 20 can be exploded, so that the internal pressure of the housing 10 can be timely released, and the safety problem of the battery can be avoided.

The explosion-proof structure 20 is located on the first surface 11 of the housing 10, and the ratio of the distance between the explosion-proof structure 20 and the edge of the first surface 11 to the distance between two opposite edges of the first surface 11 is greater than or equal to 0.05 along the same direction, for example, when the first surface 11 is a rectangular surface and the explosion-proof structure 20 is a circular structure, the ratio of the distance between the explosion-proof structure 20 and the edge of the rectangular surface to the length of the first surface 11 along the length direction of the first surface 11 is greater than or equal to 0.05, or the ratio of the distance between the explosion-proof structure 20 and the edge of the rectangular surface to the width of the first surface 11 along the width direction of the first surface 11 is greater than or equal to 0.05, or the ratio of the distance between the explosion-proof structure 20 and the edge of the rectangular surface to the length of the diagonal of the first surface 11 along the diagonal direction of the first surface 11 is greater than or equal to 0.05; therefore, the explosion-proof structure 20 cannot be too close to the edge of the first surface 11, namely, the explosion-proof structure 20 can be located in the middle of the first surface 11, so that the problem that the structural strength of the housing 10 is weakened due to the fact that the explosion-proof structure 20 is too close to the edge of the first surface 11 can be avoided, the problems that the housing 10 is broken in the using process and the like are avoided, the using performance of the battery shell is improved, and the problem that the performance of the explosion-proof structure 20 is weakened due to structural damage of the housing 10 cannot occur.

The explosion-proof structure 20 may be an explosion-proof valve in the related art, for example, the explosion-proof structure 20 may be an explosion-proof sheet, which is an integrally formed structure with the housing 10, or the explosion-proof structure 20 may be a thin metal sheet, which is an integrally formed structure with the housing 10; alternatively, the explosion-proof structure 20 may be composed of a main body and an explosion-proof section, the main body may be connected to the housing 10, the explosion-proof section is connected to the main body, and the explosion-proof section and the main body may be an integrally formed structure, or the explosion-proof section may be separately connected to the main body, and the main body and the housing 10 are an integrally formed structure.

In one embodiment, the explosion-proof structure 20 is located on the first surface 11 of the housing 10, and the distance between the explosion-proof structure 20 and the edge of the first surface 11 is greater than or equal to 2.5mm, so that the explosion-proof structure 20 can be prevented from influencing the structural strength of the housing 10 while ensuring the reliable explosion-proof performance of the explosion-proof structure 20, thereby ensuring the reliable structural strength of the housing 10, and improving the safety performance of the battery case.

The explosion-proof structure 20 is located on the first surface 11 of the housing 10, and the distance between the explosion-proof structure 20 and the edge of the first surface 11 is greater than or equal to 2.5mm, that is, the explosion-proof structure 20 can be located in the middle of the first surface 11, so that the problem that the structural strength of the housing 10 is weakened due to the fact that the explosion-proof structure 20 is too close to the edge of the first surface 11 can be avoided, the problems that the housing 10 is broken in the using process and the like are avoided, the service performance of the battery shell is improved, and the problem that the performance of the explosion-proof structure 20 is weakened due to structural damage of the housing 10 is avoided.

In addition, since the explosion-proof structure 20 is connected to the first surface 11 of the housing 10, and the distance between the explosion-proof structure 20 and the edge of the first surface 11 is greater than or equal to 2.5mm, when the outer edge of the housing 10 is stressed, the housing 10 needs to have a distance to the explosion-proof structure 20, so that the effect of protecting the explosion-proof structure 20 can also be achieved, and the explosion-proof performance of the explosion-proof structure 20 can be ensured.

In one embodiment, the first surface 11 is a substantially rectangular surface, and the distance between the explosion-proof structure 20 and the outer edge of the rectangular surface is greater than or equal to 2.5mm, so that the explosion-proof structure 20 can be effectively prevented from affecting the structural strength of the housing 10, and the safety use performance of the battery can be improved.

In one embodiment, as shown in fig. 2, the first surface 11 includes two first outer edges 111 and two second outer edges 112 opposite to each other, the first outer edges 111 have a length greater than that of the second outer edges 112; wherein, the distance between the explosion-proof structure 20 and the two first outer edges 111 is equal to or greater than 2.5mm, so as to reasonably arrange the installation position of the explosion-proof structure 20, ensure that the shell 10 can have reliable structural strength and improve the safety use performance of the battery shell.

As shown in fig. 2, the distance between the explosion-proof structure 20 and the first outer edge 111 can be represented as W1, and W1 is greater than or equal to 2.5mm.

In one embodiment, the ratio of the distance between the explosion-proof structure 20 and the first outer edge 111 to the distance between the two first outer edges 111 is greater than or equal to 0.05, that is, the ratio of the distance between the explosion-proof structure 20 and the first outer edge 111 to the distance between the first surfaces 11 in the width direction of the first surfaces 11 is greater than or equal to 0.05, so that not only can the installation positions of the explosion-proof structure 20 be reasonably arranged, but also the reliable structural strength of the casing 10 can be ensured, and thus the safety use performance of the battery casing can be improved.

As shown in FIG. 2, the distance between the explosion-proof structure 20 and the first outer edge 111 can be represented as W1, the distance between the two first outer edges 111 is represented as W, and W1/W ≧ 0.05.

In one embodiment, the ratio of the distance between the explosion-proof structure 20 and the first outer edge 111 to the distance between the two first outer edges 111 is less than or equal to 0.7, so that the problem that the explosion-proof structure 20 is too far away from the first outer edge 111, which results in too small an explosion-proof structure 20, and thus the explosion-proof performance of the explosion-proof structure 20 is affected can be avoided. As shown in connection with FIG. 2, the distance between the explosion-proof structure 20 and the first outer edge 111 can be represented as W1, and the distance between the two first outer edges 111 is represented as W, and W1/W is greater than or equal to 0.05 and less than or equal to 0.7.

The ratio of the distance between the explosion proof structure 20 and the first outer edge 111 to the distance between the two first outer edges 111 may be 0.05, 0.06, 0.1, 0.15, 0.2, 0.3, 0.4, 0.5, 0.55, 0.6, 0.65, or 0.7, etc.

In one embodiment, the distance between the explosion-proof structure 20 and the at least one second outer edge 112 is greater than the distance between the explosion-proof structure 20 and the first outer edge 111, so as to further ensure that the housing 10 has the optimal structural strength, improve the safety use performance of the battery case, and ensure that the explosion-proof structure 20 does not affect the structural strength of the housing 10.

In one embodiment, the distance between the explosion-proof structure 20 and the two second outer edges 112 is the same, and the explosion-proof structure 20 can be installed at the middle position of the length direction of the first surface 11, thereby ensuring that the housing 10 has balanced structural strength and ensuring the structural use performance of the battery case.

The distance between the explosion-proof structure 20 and the two first outer edges 111 can be uniform, the distance between the explosion-proof structure 20 and the two second outer edges 112 is uniform, at this time, the explosion-proof structure 20 can be installed at the center position of the first surface 11, so that after the explosion-proof structure 20 is exploded, the gas inside the battery shell can be rapidly exhausted through the explosion-proof structure 20, the pressure relief speed is increased, and the safety use performance of the battery is further ensured.

In one embodiment, the distance between the explosion-proof structure 20 and the two second outer edges 112 is not consistent, and the difference between the distance between the explosion-proof structure 20 and one second outer edge 112 and the distance between the explosion-proof structure 20 and the other second outer edge 112 is not greater than the distance between the two first outer edges 111, so that the explosion-proof structure 20 is not excessively biased to one side of the first surface 11, the explosion-proof structure 20 can be guaranteed to be exploded in time, and the gas in the battery can be uniformly exhausted from the explosion-proof structure 20 after the explosion-proof structure 20 is exploded, and the gas exhaust rate is further improved.

In one embodiment, the distance between the explosion-proof structure 20 and the two first outer edges 111 is consistent, so that the explosion-proof structure 20 can be ensured to be located at the center of the width direction of the first surface 11, structural damage of the housing 10 caused by the explosion-proof structure 20 is avoided, and the safety use performance of the battery case is improved.

It should be noted that in some embodiments, it is not excluded that the distance between the explosion-proof structure 20 and the two first outer edges 111 is not consistent, but the distance difference between the explosion-proof structure 20 and the two first outer edges 111 is not too large, so as to avoid the strength of the housing 10 from being too weak at each position.

In certain embodiments, the first surface 11 includes two opposing first outer edges 111 and two second outer edges 112, the first outer edges 111 may have a length equal to the length of the second outer edges 112, and the explosion proof structure 20 may correspond to the distance between the two first outer edges 111 and the two second outer edges 112.

It should be noted that, in some embodiments, the first surface 11 may be a circular surface, and the distance between the explosion-proof structure 20 and the outer edge of the circular surface is greater than or equal to 2.5mm, so that the structural strength of the housing 10 can be effectively prevented from being affected by the explosion-proof structure 20, and the safety use performance of the battery can be improved.

In one embodiment, as shown in fig. 1 and 2, the casing 10 is provided with a liquid injection hole 14; wherein, the liquid injection hole 14 is located on the first surface 11, that is, the liquid injection hole 14 can be located on the same surface with the explosion-proof structure 20, thereby improving the utilization rate of the first surface 11 and reasonably arranging various components of the battery.

In one embodiment, the distance between the liquid injection hole 14 and the explosion-proof structure 20 is greater than or equal to 7mm, and on the basis of ensuring the structural strength of the casing 10, a placing space can be provided for the liquid injection nozzle, so that the electrolyte can be injected into the battery from the liquid injection hole 14.

As shown in FIG. 2, the distance between the liquid injection hole 14 and the explosion-proof structure 20 can be represented as W2, wherein W2 is greater than or equal to 7mm.

In one embodiment, the distance between the pour hole 14 and the blast-proof structure 20 is not greater than the distance between the pour hole 14 and the edge of the first surface 11, so that the pour hole 14 can be spaced from the outer edge of the first surface 11 to prevent the pour hole 14 from causing structural damage to the case 10.

In one embodiment, the distance between the liquid injection hole 14 and the edge of the first surface 11 is greater than or equal to 7mm, so that the liquid injection hole 14 can be ensured not to damage the structure of the casing 10, and the casing 10 can be ensured to have enough structural strength, thereby ensuring the safe use performance of the battery.

In one embodiment, the length of the explosion-proof structure 20 is 6mm-80mm along the direction parallel to the first surface 11, which not only ensures that the explosion-proof structure 20 has reliable explosion-proof performance, but also ensures that the explosion-proof structure 20 has reasonable length and size, which not only effectively protects the battery, but also avoids damage to the battery shell structure caused by over-size.

The length of the blast-proof structure 20 may be 6mm, 7mm, 8mm, 9mm, 10mm, 15mm, 20mm, 22mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm, 65mm, 70mm, 75mm, 77mm, 78mm, 80mm, or the like.

In one embodiment, the length of the explosion-proof structure 20 is 6mm-80mm in the direction perpendicular to the length direction of the first surface 11, so that the problem that the distance between the explosion-proof structure 20 and the first outer edge 111 of the first surface 11 is too small can be avoided on the basis of ensuring the reasonable size of the explosion-proof structure 20, and the battery case structure cannot be damaged on the basis of ensuring the explosion-proof performance of the explosion-proof structure 20.

In a direction perpendicular to the length direction of the first surface 11, i.e., in a direction parallel to the extending direction of the second outer edge 112, as shown in fig. 2, the length of the explosion-proof structure 20 may be denoted as W3, and W3 may be 6mm to 80mm in the direction perpendicular to the length direction of the first surface 11.

In one embodiment, the height of the explosion-proof structure 20 is less than or equal to 15mm along the direction perpendicular to the first surface 11, which not only ensures that the explosion-proof structure 20 can have reliable explosion-proof performance, but also prevents the explosion-proof structure 20 from occupying too much inner space of the housing 10, or prevents the explosion-proof structure 20 from excessively increasing the height of the battery case, thereby improving the service performance of the battery and further increasing the volume energy density of the battery.

As shown in fig. 3, the height of the explosion-proof structure 20 may be represented as W4, and W4 may be 15mm or less.

In one embodiment, as shown in fig. 1, the housing 10 includes a cover plate 12 and a housing member 13 connected to each other, and the explosion-proof structure 20 is connected to the cover plate 12, which is not only simple in structure, but also facilitates the arrangement of the explosion-proof structure 20.

Cover 12 and housing piece 13 may be separately formed structures, or cover 12 and housing piece 13 may be integrally formed structures.

In one embodiment, as shown in fig. 1, the battery case is a quadrangular prism-type battery case, and the housing 10 further includes two opposite second surfaces 15, two opposite third surfaces 16, and a fourth surface 17, the fourth surface 17 being disposed opposite to the first surface 11; wherein the area of the second surface 15 is larger than that of the first surface 11, the area of the second surface 15 is larger than that of the third surface 16, that is, the explosion-proof structure 20 may not be disposed on the largest surface of the battery case, so as to avoid the explosion-proof structure 20 from affecting the grouping of the thickness batteries, for example, when the batteries are grouped, the second surfaces 15 of the adjacent battery cases are disposed oppositely.

In one embodiment, the area of the first surface 11 is larger than that of the third surface 16, and the explosion-proof structure 20 is disposed on the first surface 11, so that the explosion-proof structure 20 can be disposed on the first surface 11 with a relatively large area, and the arrangement of the battery cell inside the battery case can be facilitated, and the explosion-proof structure 20 can be facilitated.

An embodiment of the utility model also provides a battery, including foretell battery case.

The utility model discloses an embodiment battery includes battery case, battery case includes shell 10 and blast resistant construction 20, blast resistant construction 20 at least part and shell 10 be integrated into one piece formula structure, blast resistant construction 20 is located shell 10's first surface 11, through making along same direction, the distance between blast resistant construction 20 and the edge of first surface 11 and the distance between two edges that first surface 11 is relative than or equal to 0.05, when guaranteeing that blast resistant construction 20 has reliable explosion-proof performance, can guarantee that blast resistant construction 20 can and first surface 11 have certain distance value between the edge, can avoid blast resistant construction 20 to influence shell 10's structural strength, guarantee from this that shell 10 has reliable structural strength, thereby improve battery case's safety and service performance.

Note that the battery includes a cell and an electrolyte, and a minimum unit capable of performing an electrochemical reaction such as charge/discharge. The battery cell refers to a unit formed by winding or laminating a stacking portion, wherein the stacking portion comprises a first pole piece, a partition and a second pole piece. When the first pole piece is a positive pole piece, the second pole piece is a negative pole piece. And the polarities of the first pole piece and the second pole piece can be interchanged. The first pole piece and the second pole piece are coated with active materials.

In one embodiment, the battery may be a prismatic battery, that is, the battery may be a prismatic battery, which mainly refers to a straight line whose shape is a prism, but does not strictly limit whether each edge of the prism is strictly defined, and the corner between the edges is not necessarily a right angle, and may be an arc transition.

The battery can be the lamination formula battery, and it is convenient not only to make up, and can process and obtain the longer battery of length. Specifically, the electric core is the lamination formula electric core, and the electric core has first pole piece that range upon range of each other, with first pole piece opposite second pole piece of electric property and the diaphragm piece of setting between first pole piece and second pole piece to make and pile up formation lamination formula electric core to many pairs of first pole piece and second pole piece.

Or, the battery may be a winding battery, that is, a first pole piece, a second pole piece having an opposite electrical property to the first pole piece, and a diaphragm sheet disposed between the first pole piece and the second pole piece are wound to obtain a winding battery core.

In one embodiment, the battery may be a cylindrical battery. The battery may be a winding battery, that is, a first pole piece, a second pole piece having an opposite electrical property to the first pole piece, and a diaphragm piece disposed between the first pole piece and the second pole piece are wound to obtain a winding battery cell.

In one embodiment, as shown in fig. 1 and fig. 2, the battery further includes a pole structure 30, the pole structure 30 is disposed on the housing 10, the explosion-proof structure 20 and the pole structure 30 are located on the same surface of the housing 10, and the pole structure 30 can be electrically connected to the battery cell.

The pole structure 30 may be one, one pole structure 30 may be connected to one tab of the battery cell, and the other tab of the battery cell may be electrically connected to the housing 10, so that the housing 10 and the pole structure 30 may be used as an electrode leading-out terminal.

Or, the two pole structures 30 may be two, and the two pole structures 30 are electrically connected to two tabs of the battery cell, so that the two pole structures 30 can be used as electrode leading-out terminals respectively, and the structures of the two pole structures 30 may be consistent, or the structures of the two pole structures 30 may not be consistent, which is not limited herein.

In one embodiment, the casing 10 is provided with the liquid injection hole 14, the number of the pole structures 30 is two, and the liquid injection hole 14 and the explosion-proof structure 20 can be located between the two pole structures 30, so as to ensure that each component can be reasonably arranged on the casing 10, and improve the space utilization rate of the casing 10.

In one embodiment, one of the post structure 30 and the explosion proof structure 20 is disposed on the housing member 13, and the other is disposed on the cover plate 12, thereby separating the explosion proof structure 20 and the post structure 30, and also preventing heat from impacting the post structure 30 when the explosion proof structure 20 bursts.

In one embodiment, the terminal structure 30 and the explosion-proof structure 20 are both disposed on the housing member 13 or the cover plate 12, thereby improving the space utilization of the battery.

In one embodiment, the pole structure 30 and the explosion-proof structure 20 are oppositely arranged, that is, the pole structure 30 and the explosion-proof structure 20 can be arranged on two opposite sides of the battery, so that the pole structure 30 and the explosion-proof structure 20 can be reasonably arranged.

The pole structure 30, the injection hole 14, and the explosion-proof structure 20 may be all provided on the housing member 13, or the pole structure 30, the injection hole 14, and the explosion-proof structure 20 may be all provided on the lid plate 12.

Alternatively, one of the pole structure 30, the injection hole 14 and the explosion-proof structure 20 may be disposed on the housing member 13, and the other two may be disposed on the cover plate 12, for example, the pole structure 30 may be disposed on the housing member 13, and the injection hole 14 and the explosion-proof structure 20 may be disposed on the cover plate 12; alternatively, the liquid injection hole 14 may be formed on the housing member 13, and the post structure 30 and the explosion-proof structure 20 may be formed on the cover plate 12; alternatively, the explosion-proof structure 20 may be disposed on the housing member 13, and the post structure 30 and the liquid injection hole 14 may be disposed on the cover plate 12; alternatively, the pole structure 30 may be disposed on the cover plate 12, and the injection hole 14 and the explosion-proof structure 20 may be disposed on the housing member 13; alternatively, the liquid injection hole 14 may be formed in the cover plate 12, and the post structure 30 and the explosion-proof structure 20 may be formed in the housing member 13; alternatively, the explosion-proof structure 20 may be provided on the lid plate 12, the pole structure 30 and the injection hole 14 may be provided on the housing member 13, and so on.

An embodiment of the utility model also provides a battery pack, including foretell battery.

The utility model discloses a group battery of embodiment includes the battery, the battery case body of battery includes shell 10 and blast resistant construction 20, blast resistant construction 20 at least part and shell 10 formula structure as an organic whole, blast resistant construction 20 is located shell 10's first surface 11, through making along same direction, the distance between blast resistant construction 20 and the edge of first surface 11 and the distance between two edges that first surface 11 is relative than being equal to or greater than 0.05, when guaranteeing that blast resistant construction 20 has reliable explosion-proof performance, can guarantee that blast resistant construction 20 can and first surface 11 have certain distance value between the edge, can avoid blast resistant construction 20 to influence shell 10's structural strength, guarantee from this that shell 10 has reliable structural strength, thereby improve battery case body's safety performance.

In one embodiment, the battery pack is a battery module or a battery pack.

The battery module includes a plurality of batteries, and the battery can be square battery, and the battery module can also include end plate and curb plate, and end plate and curb plate are used for fixing a plurality of batteries. The battery can be a cylindrical battery, and the battery module can further comprise a bracket, and the battery can be fixed on the bracket.

The battery pack comprises a plurality of batteries and a box body, and the box body is used for fixing the batteries.

It should be noted that, the battery pack includes a plurality of batteries, and a plurality of batteries are disposed in the box body. Wherein, a plurality of batteries can form and install in the box behind the battery module. Or, a plurality of batteries can directly set up in the box, need not to carry out the group to a plurality of batteries promptly, utilizes the box to fix a plurality of batteries.

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 (20)

1. A battery shell is characterized by comprising a shell (10) and an explosion-proof structure (20), wherein at least part of the explosion-proof structure (20) and the shell (10) are of an integral structure, the explosion-proof structure (20) is positioned on a first surface (11) of the shell (10), and the ratio of the distance between the explosion-proof structure (20) and the edge of the first surface (11) to the distance between two opposite edges of the first surface (11) along the same direction is not less than 0.05.

2. A battery housing according to claim 1, characterized in that the first surface (11) is a substantially rectangular surface.

3. The battery case according to claim 2, wherein the first surface (11) comprises two first outer edges (111) and two second outer edges (112) opposite to each other, the first outer edges (111) having a length greater than the length of the second outer edges (112);

wherein the ratio of the distance between the explosion-proof structure (20) and the first outer edges (111) to the distance between the two first outer edges (111) is more than or equal to 0.05.

4. A battery housing according to claim 3, characterized in that the distance between the explosion-proof structure (20) and at least one of the second outer edges (112) is greater than the distance between the explosion-proof structure (20) and the first outer edge (111).

5. A battery housing according to claim 4, characterized in that said explosion-proof structure (20) coincides with the distance between the two second outer edges (112).

6. A battery casing according to claim 4, characterised in that the distance between the explosion-proof structure (20) and the two second outer edges (112) does not coincide, the difference between the distance between the explosion-proof structure (20) and one of the second outer edges (112) and the distance between the explosion-proof structure (20) and the other of the second outer edges (112) being no greater than the distance between the two first outer edges (111).

7. A battery housing according to claim 3, characterized in that the explosion-proof structure (20) corresponds to the distance between the two first outer edges (111).

8. A battery housing according to claim 3, characterized in that the ratio of the distance between the explosion-proof structure (20) and the first outer edge (111) to the distance between the two first outer edges (111) is ≦ 0.7.

9. A battery housing according to any of claims 1 to 8, characterized in that the distance between the explosion-proof structure (20) and the edge of the first surface (11) is greater than or equal to 2.5mm.

10. The battery case according to any one of claims 1 to 8, characterized in that a liquid injection hole (14) is provided on the case (10);

wherein the liquid injection hole (14) is positioned on the first surface (11).

11. The battery case according to claim 10, wherein the distance between the liquid injection hole (14) and the explosion-proof structure (20) is 7mm or more.

12. The battery case according to claim 11, wherein the distance between the pour hole (14) and the explosion-proof structure (20) is not greater than the distance between the pour hole (14) and the edge of the first surface (11).

13. The battery case according to claim 10, wherein the distance between the pour hole (14) and the edge of the first surface (11) is 7mm or more.

14. A battery housing according to any of claims 1 to 8, characterized in that the length of the explosion-proof structure (20) in a direction parallel to the first surface (11) is 6-80 mm.

15. A battery housing according to claim 14, characterized in that the length of the explosion-proof structure (20) in a direction perpendicular to the length direction of the first surface (11) is 6-80 mm.

16. The battery case according to any one of claims 1 to 8, wherein the height of the explosion-proof structure (20) in a direction perpendicular to the first surface (11) is 15mm or less.

17. The battery case according to any one of claims 1 to 8, wherein the outer case (10) comprises a cover plate (12) and a case member (13) which are connected, and the explosion-proof structure (20) is connected to the cover plate (12).

18. The battery case according to any one of claims 1 to 8, characterized in that the battery case is a quadrangular-prism-type battery case, the outer case (10) further comprising two opposing second surfaces (15), two opposing third surfaces (16), and a fourth surface (17), the fourth surface (17) being disposed opposite to the first surface (11);

wherein the area of the second surface (15) is larger than the area of the first surface (11), and the area of the second surface (15) is larger than the area of the third surface (16).

19. The battery case according to claim 18, wherein the area of the first surface (11) is larger than the area of the third surface (16).

20. A battery comprising the battery case according to any one of claims 1 to 19.

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