CN221226402U - Battery and battery device - Google Patents

Abstract

The utility model relates to the technical field of batteries, in particular to a battery device and a battery, wherein the battery comprises a shell, a battery core, a cover plate, a pole assembly and a switching piece, the battery core is arranged in the shell and is provided with a first surface and a second surface, the first surface is exposed out of an opening of the shell, a pole lug is arranged on the second surface, the cover plate is arranged in the opening, a convex hull is arranged on one side surface of the cover plate, which is opposite to the battery core, a groove is arranged on the position, corresponding to the convex hull, of one side surface of the cover plate, which is opposite to the battery core, and the pole assembly is arranged in the shell and is at least partially positioned at the convex hull; the switching piece comprises a lug connecting part and a pole connecting part which are connected in a bending way, the surface of one side of the cover plate, which faces the battery core, is taken as a reference surface, and the orthographic projection of the bending part of the switching piece and the orthographic projection of the pole connecting part are completely positioned in the groove on the reference surface; the pole connection portion is arranged parallel to the first surface, a first area of the first surface is at least partially attached to the pole connection portion, and the remaining portion is at least partially attached to a second area of the cover plate.

Description

Battery and battery device

Technical Field

The present utility model relates to the field of battery technologies, and in particular, to a battery and a battery device.

Background

In the design scheme of the existing battery, a pole is arranged on a cover plate of the battery, heat at the pole is large, and in order to achieve heat dissipation of the battery on one side of the cover plate, a part of the existing scheme is provided with a cooling device on the cover plate, so that the battery core is required to be attached to the cover plate as much as possible. On the basis, in some existing battery designs, a convex hull is formed at the position, corresponding to the pole, of the cover plate, the convex hull protrudes outwards (back to the battery cell), the adapter piece is connected to the pole, and a part of the adapter piece is accommodated in a groove formed on the inner side surface (side surface facing the battery cell) of the convex hull. However, since the cover plate is formed at the bending position of the convex hull and is too close to the battery cell, and the bending position of the cover plate is overlapped with the orthographic projection of the battery cell in the height direction (the opposite arrangement direction of the cover plate and the battery cell), the adapting piece is required to be provided with the avoiding part to avoid the bending position of the cover plate, and the avoiding structure (such as an inclined bevel edge and the like) of the avoiding part can enable the battery cell to be propped against the bending position of the avoiding part, so that the laminating effect of the battery cell and the cover plate is poor.

Disclosure of utility model

The present utility model is directed to a battery with a better lamination effect between a battery cell and a cover plate, which overcomes at least one of the above-mentioned drawbacks of the prior art.

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

According to one aspect of the present utility model, there is provided a battery, wherein: the battery comprises a shell, a battery cell, a cover plate, a pole column assembly and a switching piece, wherein an opening is formed in the shell, the battery cell is arranged in the shell, the battery cell is provided with a first surface perpendicular to a first direction and a second surface parallel to the first direction, the first surface is exposed out of the opening, a pole lug of the battery cell is arranged on the second surface, the cover plate is arranged in the opening, a convex hull is arranged on one side surface of the cover plate, facing away from the battery cell, a groove is formed in the position, corresponding to the convex hull, of one side surface of the cover plate, facing the battery cell, and the pole column assembly is arranged in the shell and is at least partially positioned at the convex hull; the electrode lug connecting part is connected with the electrode lug, the electrode post connecting part is connected with the electrode post assembly, the surface of one side of the cover plate, which faces the battery core, is used as a reference surface, and on the reference surface, the orthographic projection of the bent part of the switching piece and the orthographic projection of the electrode post connecting part are completely positioned in the groove; the pole connecting portion is parallel to the first surface, the first surface comprises a first area with orthographic projection of the pole connecting portion, the side surface, facing the battery core, of the cover plate comprises a second area with orthographic projection of the battery core and without the grooves, the first area of the first surface is at least partially attached to the pole connecting portion, and the rest of the first surface is at least partially attached to the second area.

According to the technical scheme, the battery provided by the utility model has the advantages and positive effects that:

The battery provided by the utility model is characterized in that the adapter piece is designed to be completely positioned in the groove of the cover plate at the bending part and the orthographic projection of the pole connecting part. Through the structural design, the problem that the bending part of the cover plate and the bending part of the switching piece are overlapped in orthographic projection mode due to the fact that the convex hull is arranged can be avoided, namely, the bending part of the switching piece and the pole connecting part are arranged corresponding to the groove of the cover plate completely and cannot interfere with the groove wall of the groove. Therefore, the adapter piece does not need to be provided with the avoiding structure, so that the attaching effect of the battery cell and the cover plate is not affected by the avoiding structure, the attaching effect of the battery cell and the cover plate is improved, and the heat of the battery cell can be transmitted and led out through the cover plate better.

Another main object of the present utility model is to overcome at least one of the above-mentioned drawbacks of the prior art and to provide a battery device employing the above-mentioned battery.

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

According to one aspect of the present utility model, there is provided a battery device, including the battery according to the present utility model.

As can be seen from the above technical solutions, the battery device provided by the present utility model has the following advantages and positive effects:

According to the battery device provided by the utility model, the heat of the battery core can be better transferred and led out through the cover plate by adopting the battery provided by the utility model, so that the thermal performance of the battery device is improved.

Drawings

Various objects, features and advantages of the present utility model will become more apparent from the following detailed description of the preferred embodiments of the utility model, when taken in conjunction with the accompanying drawings. The drawings are merely exemplary illustrations of the utility model and are not necessarily drawn to scale. In the drawings, like reference numerals refer to the same or similar parts throughout. Wherein:

Fig. 1 is a schematic perspective view of a battery according to an exemplary embodiment;

fig. 2 is an exploded perspective view of the battery shown in fig. 1;

FIG. 3 is another view from the perspective of FIG. 2;

FIG. 4 is a top view of the battery shown in FIG. 1;

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

FIG. 6 is an enlarged schematic view of portion B of FIG. 5;

FIG. 7 is an enlarged schematic view of portion C of FIG. 6;

Fig. 8 is a schematic perspective view of the cover plate shown in fig. 1;

fig. 9 to 11 are partial enlarged sectional views of batteries according to other several exemplary embodiments, respectively;

fig. 12 is a schematic perspective view of a battery according to another exemplary embodiment;

Fig. 13 is an exploded perspective view of the battery shown in fig. 12;

Fig. 14 is a schematic perspective view of the cover plate shown in fig. 12.

The reference numerals are explained as follows:

100. A housing;

111. A third step surface;

112. A fourth step surface;

113. a second elevation;

200. A battery cell;

201. A first surface;

202. A second surface;

300. a cover plate;

310. convex hulls;

320. A groove;

331. a first step surface;

332. a second step surface;

333. a first elevation;

340. Folding edges;

400. A pole assembly;

500. A transfer sheet;

510. A tab connection part;

520. A pole connection portion;

521. a first section;

522. a second section;

523. a third section;

600. A thermally conductive patch;

G. a gap;

x, a first direction;

Y, the second direction;

And Z, third direction.

Detailed Description

Exemplary embodiments that embody features and advantages of the present utility model are described in detail in the following description. It will be understood that the utility model is capable of various modifications in various embodiments, all without departing from the scope of the utility model, and that the description and drawings are intended to be illustrative in nature and not to be limiting.

In the following description of various exemplary embodiments of the utility model, 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 utility model 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 utility model. Moreover, although the terms "over," "between," "within," and the like may be used in this description to describe various exemplary features and elements of the utility model, these terms are used herein for convenience only, e.g., in terms of the orientation of the examples depicted in the drawings. Nothing in this specification should be construed as requiring a particular three-dimensional orientation of the structure in order to fall within the scope of the utility model.

Referring to fig. 1, a schematic perspective view of a battery according to the present utility model is representatively illustrated. In this exemplary embodiment, the battery proposed by the present utility model is described as being applied to a vehicle-mounted battery as an example. Those skilled in the art will readily appreciate that many modifications, additions, substitutions, deletions, or other changes may be made to the specific embodiments described below in order to adapt the relevant designs of the present utility model to other types of battery devices, and such changes are still within the principles of the battery presented herein.

As shown in fig. 1, in an embodiment of the utility model, a battery according to the present utility model includes a housing 100, a battery cell 200, a cover 300, a post assembly 400, and a tab 500. The housing 100 is open. The battery cell 200 is disposed in the housing 100, and the battery cell 200 has a first surface 201 perpendicular to the first direction X and a second surface 202 parallel to the first direction X, the first surface 201 is exposed to the opening, and the tab of the battery cell 200 is disposed on the second surface 202. The cover 300 is disposed at an opening of the housing 100, a convex hull 310 is disposed on a side surface of the cover 300 facing away from the battery cell 200, and a groove 320 is disposed on a side surface of the cover 300 facing toward the battery cell 200 corresponding to the convex hull 310. The pole assembly 400 is disposed in the housing 100 and at least partially at the convex hull 310. Referring to fig. 2 to 8 in conjunction, fig. 2 representatively illustrates an exploded perspective view of a battery, wherein the cover plate 300 and the adapter plate 500 are separated from other structures of the battery along a first direction X, and the separation distances of the cover plate 300 and the adapter plate 500 with respect to the other structures are not equal; another perspective view of fig. 2 is representatively illustrated in fig. 3;

A top view of the battery is representatively illustrated in fig. 4; a cross-sectional view taken along line A-A in fig. 4 is representatively illustrated in fig. 5; an enlarged schematic view of portion B of fig. 5 is representatively illustrated in fig. 6;

An enlarged schematic view of portion C of fig. 6 is representatively illustrated in fig. 7; a schematic perspective view of the cover plate 300 is representatively illustrated in fig. 8. The structure, connection mode and functional relationship of the main components of the battery according to the present utility model will be described in detail with reference to the above drawings.

As shown in fig. 1 to 8, in an embodiment of the present utility model, the adaptor tab 500 includes a tab connection portion 510 and a post connection portion 520 connected in a bending manner, the tab connection portion 510 is connected to a tab of the battery cell 200, and the post connection portion 520 is connected to the post assembly 400. The surface of the cover 300 facing the battery cell 200 is taken as a reference surface, and on the reference surface, the front projection of the bending part of the adapter piece 500 and the front projection of the terminal connection part 520 are all located in the groove 320. On this basis, the terminal connection 520 is arranged parallel to the first surface 201 of the cell 200, and the first surface 201 of the cell 200 includes a first region having a front projection of the terminal connection 520, and a side surface of the cover 300 facing the cell includes a second region having a front projection of the cell 200 and not provided with the recess 320, the first region of the first surface 201 is at least partially abutted with the terminal connection 520, and the rest of the first surface 201 is at least partially abutted with the second region of the cover 300. Through the above structural design, the present utility model can avoid the problem that the bending position of the cover plate 300 formed by the convex hull 310 and the bending position of the adaptor 500 are overlapped by orthographic projection, that is, the bending position of the adaptor 500 and the pole connection part 520 are completely arranged corresponding to the groove 320 of the cover plate 300 without interfering with the groove wall of the groove 320. Accordingly, the adapter piece 500 does not need to be provided with an avoiding structure, so that the attaching effect of the battery cell 200 and the cover plate 300 is not affected by the avoiding structure, the attaching effect of the battery cell 200 and the cover plate 300 is improved, and heat of the battery cell 200 can be better transferred and led out through the cover plate 300.

It should be noted that "the portion of the first surface 201 of the electrical core 200 is attached to the terminal connection portion 520" may be understood as that the portion of the first surface 201 is directly attached to the terminal connection portion 520, or may be understood as indirectly attached, for example, that the first surface 201 is indirectly attached to the terminal connection portion 520 through a heat conducting member, which may refer to a heat conducting patch 600 described below, and similarly, that the remaining portion of the first surface 201 is at least partially attached to the second region of the cover 300, or may be understood as that the remaining portion of the first surface 201 is directly attached to the second region of the cover 300, or may be understood as indirectly attached, for example, that the remaining portion of the first surface 201 is indirectly attached to the second region of the cover 300 through a heat conducting plastic member, thereby further ensuring insulation performance on the basis of providing heat conducting effect. In some of the figures (e.g. fig. 10 and 11), a gap exists between the remaining portion of the first surface 201 of the battery cell 200 and the second region of the cover plate 300, and the gap only conceals the structure such as the heat conductive plastic member between the remaining portion and the remaining portion, and in fact the first surface 201 and the cover plate 300 are indirectly attached to each other at the above-mentioned position via the heat conductive plastic member. The cell 200 may include only the cell 200 body, or may include the cell 200 body and an inner insulating film covering the surface of the cell 200 body, that is, the terminal connection portion 520 may be bonded to the outer surface of the inner insulating film.

It should be noted that, in the embodiment shown in fig. 6, the bending portion of the adaptor tab 500 and the pole connecting portion 520 are both accommodated in the groove 320, and in some embodiments, the bending portion and the pole connecting portion 520 may be partially accommodated in the groove 320, which only needs to satisfy the overlapping relationship of the front projection.

As shown in fig. 6, in an embodiment of the present utility model, the adaptor tab 500 includes a bending connection structure connected between the tab connection portion 510 and the tab connection portion 520, in addition to the tab connection portion 510 and the tab connection portion 520, and the bending connection structure may be, for example, an arc shape as shown in the drawings. In other words, the tab connection 510 and the tab connection 520 may not be directly connected, but indirectly connected through other bending transition structures. Further, taking the example that the tab connection portion 510 is perpendicular to the post connection portion 520, the bent connection structure is approximately in a quarter arc shape, and at this time, the portion of the switching piece 500 parallel to the first surface 201 of the battery cell 200 is only the post connection portion 520, but does not include the bent connection structure. In other embodiments of the present utility model, for example, in the embodiment shown in fig. 10 or 11, the tab connection 510 is directly connected to the tab connection 520, i.e., there is no transition structure therebetween (but not limited to, an arc shape, a slope shape, or other microscopic morphology that may exist at a microscopic scale), i.e., the portion of the tab 500 parallel to the first surface 201 of the cell 200 is the entire portion of the tab 500 (i.e., the tab connection 520) except for the tab connection 510.

As shown in fig. 6, in an embodiment of the present utility model, a thermally conductive patch 600 may be disposed between the first surface 201 of the battery cell 200 and the terminal connection portion 520 of the switching tab 500, that is, the first surface 201 and the terminal connection portion 520 are bonded through the thermally conductive patch 600. Through the structural design, the heat conduction effect of transmitting the heat of the battery cell 200 to the pole assembly 400 and the cover plate 300 can be optimized, and the rapid heat dissipation through the external heat exchange device is further facilitated.

As shown in fig. 6, in an embodiment of the present utility model, the tab connection portion 510 and the tab connection portion 520 may be bent and connected relatively vertically, i.e. substantially with an angle of 90 °, in other words, the tab connection portion 510 of the switching piece 500 may be arranged parallel to the second surface 202 of the battery cell 200. It should be understood that, according to different bending processes, or considering the microscopic shape of the tab 500 at the bending position, the shape of the inclined surface or the cambered surface of the tab 500 may be formed at the bending position, which is not limited to the standard right angle bending shape, and does not affect the relative bending relationship between the tab connection portion 510 and the pole connection portion 520 in the whole or macroscopically. Through the above structural design, the present utility model can further optimize the bonding effect between the switching piece 500 and the battery cell 200.

In some embodiments of the present utility model, the post assembly 400 is located partially through the convex hull 310 within the concave recess 320. On this basis, the pole connection part 520 may have a connection section in the shape of a flat plate, whereby the pole connection part 520 is connected to the pole assembly 400 via the connection section, i.e. the first region of the first surface 201 is at least partially attached to the connection section. For example, the pole connection portions 520 shown in fig. 6, 10 and 11 may be regarded as being flat as a whole, i.e., the pole connection portions 520 are all connection segments. Through the above structural design, the present utility model can increase the bonding surface between the switching piece 500 and the battery cell 200, thereby increasing the heat dissipation area, and thereby, the heat can be more rapidly conducted out through the pole assembly 400. As another example, only a portion of the pole connection 520 shown in fig. 9 is connected to the pole assembly 400 and has a flat plate shape, and then the portion of the pole connection 520 is a connection section, while the remaining portion of the pole connection 520 is not connected to the pole assembly 400 and may have other shapes. For example, the terminal connection part 520 shown in fig. 9 has a first section 521, a second section 522 and a third section 523, where the first section 521 is the connection section, the second section 522 is connected to the tab connection part 510 and is attached to the first surface 201 of the battery cell 200, the third section 523 is connected between the first section 521 and the second section 522, and the third section 523 may extend in a direction (i.e. the first direction X) substantially perpendicular to the first surface 201, for example, as shown in the drawings, or may be in a relatively inclined or curved form.

As shown in fig. 1 to 5 and 8, in an embodiment of the utility model, two convex hulls 310 are disposed on a side surface of the cover 300 facing away from the battery cell 200, and two grooves 320 are disposed on a side surface of the cover 300 facing the battery cell 200 and corresponding to the two convex hulls 310, respectively, and the two convex hulls 310 are spaced apart along a second direction Y, where the second direction Y is perpendicular to the second surface 202 of the battery cell 200, i.e., the second direction Y is perpendicular to the first direction X. In other words, the battery provided by the utility model can adopt a structural design that the positive electrode and the negative electrode are led out from the same side. On this basis, the second area of the side surface of the cover 300 facing the battery cell 200 may be located between the two grooves 320.

As shown in fig. 1 to 7, in an embodiment of the present utility model, the groove 320 has groove walls on both sides in the second direction Y, that is, a gap G is formed between the convex hull 310 and the edge of the adjacent cover plate 300 along the second direction Y. In the embodiment shown in fig. 1 to 4, the groove 320 has groove walls on both sides in the third direction Z, which is perpendicular to the first direction X and perpendicular to the second direction Y. In some embodiments, when both sides of the groove 320 in the second direction Y have groove walls, either or both sides of the groove 320 in the third direction Z may have an open structure without groove walls, which is not limited to this embodiment.

As shown in fig. 7, based on the structural design that the groove 320 has groove walls at both sides in the second direction Y, the edge of the cover plate 300 in the second direction Y toward one side surface of the case 100 may be provided with a stepped structure having a first stepped surface 331, a second stepped surface 332, and a first elevation 333 connected between the first stepped surface 331 and the second stepped surface 332. The end surface of the housing 100 facing one end of the cover 300 abuts against the first step surface 331, and the inner surface portion of the housing 100 facing the battery cell 200 abuts against the first vertical surface 333. Through the structural design, the step structure can not only play a role in limiting and convenient welding of the cover plate 300 and the shell 100, but also enable the bending part of the cover plate 300 formed by the convex hull 310 to be far away from the switching piece 500, compared with the prior art that the step structure is arranged on the inner wall of the shell, the bending part of the cover plate is arranged closer to the battery cell.

Referring to fig. 9, there is representatively illustrated in fig. 9 an enlarged partial cross-sectional view of a battery capable of embodying principles of the present utility model in another exemplary embodiment, which may be particularly referred to in the fig. 5 in the cut-away position of fig. 4 and in the enlarged region of fig. 6 in fig. 5.

As shown in fig. 9, in one embodiment of the present utility model, only a portion (i.e., the second segment 522) of the terminal connection 520 is attached to the first surface 201 of the cell 200. In other words, although the area of the first surface 201 having the pole connection 520 is larger, that is, the first area and the pole connection 520 may not be limited to the manner of the full lamination shown in fig. 6, 10 or 11, that is, the first surface 201 and the pole connection 520 may be at least partially laminated.

As shown in fig. 9, in an embodiment of the present utility model, a surface of the cover 300 facing the battery cell 200 is not entirely bonded to the first surface 201 of the battery cell 200. For example, the surface of the cover 300 facing the battery cell 200 may be divided into a region with the front projection of the battery cell 200 and a region without the front projection of the battery cell 200, and the region with the front projection of the battery cell 200 is further divided into a region with the grooves 320 and a region without the grooves 320, and then the region without the grooves 320 is bonded to the first surface 201 of the battery cell 200, which may be all or part of the bonding as shown in fig. 9. In addition, the area of the side surface of the cover 300 facing the battery cell 200, which does not have the orthographic projection of the battery cell 200, and the area provided with the groove 320 are not adhered to the first surface 201 of the battery cell 200. Referring to fig. 10, there is representatively illustrated in fig. 10 an enlarged partial cross-sectional view of a battery capable of embodying principles of the present utility model in another exemplary embodiment, which may be particularly referred to in the fig. 5 in the cut-away position of fig. 4 and in the enlarged region of fig. 6 in fig. 5.

As shown in fig. 10, still taking the structure design that the groove 320 has groove walls on both sides in the second direction Y as an example, in an embodiment of the present utility model, an edge of the convex hull 310 facing away from another convex hull 310 along the second direction Y may be directly used as an edge of the cover plate 300. In other words, there is no gap G between the convex hull 310 and the edge of the adjacent cover plate 300 in the second direction Y.

As shown in fig. 10, in an embodiment of the present utility model, the edge of the cover 300 in the second direction Y has a folded edge 340 folded toward the housing 100, and since the edge of the convex hull 310 facing away from the other convex hull 310 is directly used as the edge of the cover 300, the folded edge 340 is the edge of the convex hull 310 facing away from the other convex hull 310, that is, the groove wall of the groove 320 facing away from the other groove 320 (i.e., the opposite outer groove wall). On the basis of this, the end surface of the case 100 facing one end of the cover plate 300 may be provided with a stepped structure having a third stepped surface 111, a fourth stepped surface 112, and a second elevation 113 connected between the third stepped surface 111 and the fourth stepped surface 112. The third step surface 111 abuts against a side surface of the cover 300 facing the housing 100, the fourth step surface 112 abuts against a side surface of the flange 340 facing the housing 100, and the second vertical surface 113 abuts against a side surface of the flange 340 facing the battery cell 200.

Referring to fig. 11, there is representatively illustrated in fig. 11 a partial enlarged cross-sectional view of a battery capable of embodying principles of the present utility model in yet another exemplary embodiment, which may be particularly referred to in the fig. 5 cut-away position of fig. 4 and in the enlarged region of fig. 6 of fig. 5.

As shown in fig. 11, still taking a structure design with groove walls on both sides of the groove 320 in the second direction Y as an example, in an embodiment of the present utility model, a gap G is provided between the convex hull 310 and the edge of the adjacent cover plate 300 along the second direction Y. The edge of the cover plate 300 in the second direction Y may have a folded edge 340 folded toward the case 100, and the folded edge 340 is different from the folded edge 340 structure directly formed by the groove wall of the groove 320 shown in fig. 10, but is additionally formed by folding the edge of the cover plate 300. On the basis of this, the end surface of the case 100 facing one end of the cover plate 300 may be provided with a stepped structure having a third stepped surface 111, a fourth stepped surface 112, and a second elevation 113 connected between the third stepped surface 111 and the fourth stepped surface 112. The third step surface 111 abuts against a side surface of the cover 300 facing the housing 100, the fourth step surface 112 abuts against a side surface of the flange 340 facing the housing 100, and the second vertical surface 113 abuts against a side surface of the flange 340 facing the battery cell 200. Through the structural design, the bending part of the cover plate 300 formed by arranging the convex hull 310 is closer to the shell 100, so that the inner space of the shell 100 is more fully utilized, the bending part of the cover plate 300 is prevented from interfering with the switching piece 500, the switching piece 500 is ensured to be free from arranging an avoidance structure, and the attaching effect of the cover plate 300 and the battery cell 200 is optimized.

Referring to fig. 12-14, a schematic perspective view of a battery capable of embodying the principles of the present utility model in yet another exemplary embodiment is representatively illustrated in fig. 12; an exploded perspective view of the battery shown in fig. 12 is representatively illustrated in fig. 13, in which a cover 300 is separated from other structures of the battery in a first direction X; fig. 14 representatively shows a schematic perspective view of the cover plate 300 shown in fig. 12, wherein the cover plate 300 is shown in a perspective view from below.

In contrast to the embodiment shown in fig. 1 to 11, which uses a design in which the grooves 320 have groove walls on both sides in the second direction Y, as shown in fig. 12 to 14, in one embodiment of the present utility model, only one side of the groove 320 in the second direction Y has groove walls, i.e., the groove wall of each groove 320 is located on its side facing the other groove 320. Accordingly, along the second direction Y, the edge of the convex hull 310 facing away from the other convex hull 310 is the edge of the cover plate 300, in other words, the edge of the bottom wall of the groove 320 away from the other groove 320 in the second direction Y is the edge of the cover plate 300. Through the above structural design, the present utility model can completely avoid the problem that the turning part of the cover plate 300 formed by the convex hull 310 interferes with the adaptor 500.

It should be noted that, based on the structural design that the groove 320 has a groove wall on only one side in the second direction Y, in an embodiment of the present utility model, the convex hull 310 of the cover 300 may be manufactured by the following processing method: for example, the middle region of the raw material piece may be punched, and accordingly, two end portions that are not punched may form two convex hulls 310 (grooves 320) shown in fig. 12 to 14, and for example, the two end regions of the raw material piece may be punched, and accordingly, two end portions that are punched may form two convex hulls 310 (grooves 320) shown in fig. 12 to 14. In contrast, for the cover plate 300 in the embodiment shown in fig. 1-11, the machining method may be to punch the convex hull 310 out of the raw piece.

As shown in fig. 12 and 13, based on the structural design that the groove 320 has a groove wall on only one side in the second direction Y, in an embodiment of the present utility model, an end of the housing 100 facing the cover 300 may be in a profile structure with the cover 300, for example, a concave-convex shape in which two ends along the second direction Y are higher than a middle region in the drawings.

It should be noted herein that the batteries shown in the drawings and described in this specification are only a few examples of the wide variety of batteries that can employ the principles of the present utility model. It should be clearly understood that the principles of the present utility model are in no way limited to any of the details of the battery or any of the components of the battery shown in the drawings or described in this specification.

In summary, in the battery according to the present utility model, the hinge plate 500 is designed such that both the bending portion and the orthographic projection of the post connecting portion 520 are completely located in the recess 320 of the cover 300. Through the above structural design, the present utility model can avoid the problem that the bending position of the cover plate 300 formed by the convex hull 310 and the bending position of the adaptor 500 are overlapped by orthographic projection, that is, the bending position of the adaptor 500 and the pole connection part 520 are completely arranged corresponding to the groove 320 of the cover plate 300 without interfering with the groove wall of the groove 320. Accordingly, the adapter piece 500 does not need to be provided with an avoiding structure, so that the attaching effect of the battery cell 200 and the cover plate 300 is not affected by the avoiding structure, the attaching effect of the battery cell 200 and the cover plate 300 is improved, and heat of the battery cell 200 can be better transferred and led out through the cover plate 300.

Based on the above detailed description of several exemplary embodiments of the battery set forth in the present utility model, an exemplary embodiment of the battery device set forth in the present utility model will be described below.

In one embodiment of the present utility model, the battery device according to the present utility model includes the battery according to the present utility model and described in detail in the above embodiment.

In an embodiment of the present utility model, the battery device further includes a heat exchange device, where the heat exchange device may be located on one side of the cover plate of the battery and is thermally connected to the cover plate. Therefore, the battery provided by the utility model can obtain better bonding effect of the cover plate and the battery core, and the heat exchange device is arranged on one side of the cover plate of the battery, so that the heat transferred from the battery core to the cover plate can be quickly conducted away, and the heat exchange effect is further improved.

It should be noted herein that the battery devices shown in the drawings and described in this specification are only a few examples of the wide variety of battery devices that can employ the principles of the present utility model. It should be clearly understood that the principles of the present utility model are in no way limited to any details or any components of the battery device shown in the drawings or described in this specification.

In summary, according to the battery device provided by the utility model, the heat of the battery core can be better transferred and led out through the cover plate by adopting the battery provided by the utility model, which is beneficial to improving the thermal performance of the battery device.

Exemplary embodiments of the battery and the battery device according to the present utility model are described and/or illustrated in detail above. Embodiments of the utility model 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 each step of one embodiment may also be used in combination with other components and/or steps of other embodiments. When introducing elements/components/etc. that are described and/or illustrated herein, the terms "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., in addition to the listed elements/components/etc. Furthermore, the terms "first" and "second" and the like in the claims and in the description are used for descriptive purposes only and not for numerical limitation of their subject matter.

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

Claims (12)

1. A battery, characterized in that:

The battery comprises a shell, a battery cell, a cover plate, a pole column assembly and a switching piece, wherein an opening is formed in the shell, the battery cell is arranged in the shell, the battery cell is provided with a first surface perpendicular to a first direction and a second surface parallel to the first direction, the first surface is exposed out of the opening, a pole lug of the battery cell is arranged on the second surface, the cover plate is arranged in the opening, a convex hull is arranged on one side surface of the cover plate, facing away from the battery cell, a groove is formed in the position, corresponding to the convex hull, of one side surface of the cover plate, facing the battery cell, and the pole column assembly is arranged in the shell and is at least partially positioned at the convex hull;

The electrode lug connecting part is connected with the electrode lug, the electrode post connecting part is connected with the electrode post assembly, the surface of one side of the cover plate, which faces the battery core, is used as a reference surface, and on the reference surface, the orthographic projection of the bent part of the switching piece and the orthographic projection of the electrode post connecting part are completely positioned in the groove;

The pole connecting portion is parallel to the first surface, the first surface comprises a first area with orthographic projection of the pole connecting portion, the side surface, facing the battery core, of the cover plate comprises a second area with orthographic projection of the battery core and without the grooves, the first area of the first surface is at least partially attached to the pole connecting portion, and the rest of the first surface is at least partially attached to the second area.

2. The battery of claim 1, wherein a thermally conductive patch is disposed between the first surface of the cell and the terminal connection, the first surface and the terminal connection being bonded via the thermally conductive patch.

3. The battery of claim 1, wherein the tab connection portion is bent and connected relatively perpendicularly to the post connection portion.

4. The battery of claim 1, wherein the post assembly portion is disposed in the recess through the convex hull, the post connection portion has a connection section, the connection section is planar, the post connection portion is connected to the post assembly via the connection section, and the first region of the first surface is at least partially in contact with the connection section.

5. The battery according to claim 1, wherein two convex hulls are arranged on a side surface of the cover plate, facing away from the battery cell, two grooves are respectively arranged on the side surface of the cover plate, facing the battery cell, corresponding to the two convex hulls, the two convex hulls are arranged at intervals along a second direction, the second direction is perpendicular to the second surface, and a second area of the side surface of the cover plate, facing the battery cell, is located between the two grooves.

6. The battery of claim 5, wherein the recess has a groove wall on both sides in the second direction, and wherein a gap is provided between the convex hull and the edge of the cover plate adjacent thereto in the second direction.

7. The battery according to claim 6, wherein a stepped structure is provided on an edge of the cover plate in the second direction toward a side surface of the case, the stepped structure having a first stepped surface, a second stepped surface, and a first elevation surface connected between the first stepped surface and the second stepped surface, an end surface of the case toward one end of the cover plate being abutted against the first stepped surface, an inner side surface portion of the case toward the battery cell being abutted against the first elevation surface.

8. The battery according to claim 5, wherein both sides of the groove in the second direction have groove walls, and an edge of the convex hull facing away from the other convex hull in the second direction is an edge of the cover plate.

9. The battery according to claim 6 or 8, wherein an edge of the cover plate in the second direction has a folded edge folded toward the case, an end face of the case toward one end of the cover plate is provided with a step structure having a third step surface abutting against a side surface of the cover plate toward the case, a fourth step surface abutting against a side surface of the folded edge toward the battery cell, and a second elevation connected between the third step surface and the fourth step surface.

10. The battery of claim 5, wherein only one side of the grooves in the second direction has groove walls, the groove wall of each groove being located on a side thereof facing the other groove, and an edge of the convex hull facing away from the other convex hull in the second direction is an edge of the cap plate.

11. A battery device comprising the battery according to any one of claims 1 to 10.

12. The battery device of claim 11, further comprising a heat exchange device located on one side of the cover plate of the battery and in thermally conductive connection with the cover plate.