CN219873768U - Battery and battery device - Google Patents

Abstract

The utility model relates to the technical field of batteries, and provides a battery and a battery device. The battery includes: the battery cell comprises a cover plate assembly, a battery cell and a switching piece, wherein the cover plate assembly comprises a cover plate body and an insulating piece, the cover plate body is provided with a pole, the insulating piece is arranged on one side, facing the battery cell, of the cover plate assembly, and a containing cavity is formed in one side, facing away from the cover plate body, of the cover plate assembly; the battery cell comprises a battery cell body and a pole lug part, and the pole lug part is connected with the pole column through the switching piece; the insulating piece comprises an insulating body and a buckling part, wherein the edge of at least one side of the insulating body, which is back to the cover plate body, is provided with a side opening, and the buckling part buckles the side opening; the switching piece is provided with a first state and a second state, and when in the first state, part of the switching piece protrudes out of the side opening; when in the second state, part of the transfer sheet which extends out of the accommodating cavity from the side opening is at least partially folded into the accommodating cavity. This battery can reduce the connection degree of difficulty of utmost point ear and apron subassembly upper electrode post through optimizing self structural design to promote the connection stability between utmost point ear and the utmost point post.

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 current battery design, the battery includes apron subassembly and electric core, and the utmost point ear in the electric core needs to be connected with the utmost point post on the apron subassembly, and at utmost point ear connection utmost point post in-process, the at least part of utmost point ear need extend to in the apron subassembly insulating part hold the intracavity towards one side of electric core, and the lateral wall of this insulating part can cause to shelter from and the structure interferes the operation of being connected of utmost point ear and utmost point post, is unfavorable for the welded connection of utmost point ear and utmost point post.

Therefore, how to reduce the difficulty of connecting the tab portion and the pole is a technical problem to be solved.

Disclosure of Invention

The utility model provides a battery and a battery device, wherein the battery can reduce the connection difficulty of a lug part and a pole on a cover plate assembly by optimizing the structural design of the battery so as to improve the connection stability between the lug part and the pole.

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

according to a first aspect of the present utility model, there is provided a battery comprising: the battery cell comprises a cover plate assembly, a battery cell and a switching piece, wherein the cover plate assembly comprises a cover plate body and an insulating piece, the cover plate body is provided with a pole, the insulating piece is arranged on one side, facing towards the battery cell, of the cover plate assembly, a containing cavity is formed in one side, facing away from the cover plate body, of the insulating piece, and the containing cavity is provided with an opening, and the opening faces towards the battery cell; the battery cell comprises a battery cell body and a pole lug part led out from the battery cell body, and the pole lug part is connected with the pole post through the switching piece;

the insulating piece comprises an insulating body and a buckling part which are detachably connected, wherein a side opening is formed in the edge of at least one side, facing away from the cover plate body, of the insulating body, and the buckling part is used for buckling the side opening to form the accommodating cavity;

the switching piece is provided with a first state and a second state, when the switching piece is in the first state, part of the switching piece protrudes out of the side opening to be connected with the lug part; when the transfer sheet is in the second state, part of the transfer sheet protruding out of the accommodating cavity from the side opening is at least partially folded into the accommodating cavity.

In the battery provided by the utility model, the insulating piece comprises an insulating body and a buckling part, the buckling part is detachably connected with the insulating body, and the buckling part can be adopted to buckle or open a side opening on the insulating body according to requirements; the lug part of the battery cell is connected with the pole column arranged on the cover plate body through the switching piece, in particular, the switching piece is connected with the pole column exposed in the accommodating cavity at one side of the insulating piece, which is far away from the cover plate body, and the switching piece is provided with a first state and a second state; when the switching piece is in the second state, the switching piece which protrudes out of the side opening is bent back to the corresponding position of the accommodating cavity, the lug part and the switching piece penetrate through the accommodating cavity to be connected towards the opening of the battery cell, and at least part of the switching piece is arranged in the accommodating cavity.

According to the battery provided by the utility model, the insulation body and the buckling part are designed in a split mode and are connected in a detachable mode, so that the two states of the switching piece can be matched, and after the switching piece is connected with the pole, part of the switching piece is pulled out of the accommodating cavity from the side opening of the insulation body so as to perform welding operation of the switching piece and the pole lug part; after the welding is finished, the transfer sheet is bent back to the corresponding position of the accommodating cavity, and then the buckling part is adopted to buckle the side opening, so that the complete accommodating cavity is formed. This structural design can avoid buckling parts to cause shielding and structural interference to the switching piece connection operation, therefore, can reduce the assembly degree of difficulty, promote assembly efficiency to and, can promote the connection effect of switching piece and utmost point post and utmost point ear, thereby promote the security performance of battery.

According to a second aspect of the present utility model, there is provided a battery device comprising a battery as provided in any of the above first aspects.

In the battery device provided by the utility model, the insulation body and the buckling part are designed in a split type, and are connected in a detachable mode, so that the two states of the switching piece can be matched, after the switching piece is connected with the pole, part of the switching piece is pulled out of the accommodating cavity from the side opening of the insulation body, and the welding operation of the switching piece and the pole lug part is performed; after the welding is finished, the transfer sheet is bent back to the corresponding position of the accommodating cavity, and then the buckling part is adopted to buckle the side opening, so that the complete accommodating cavity is formed. This structural design can avoid buckling parts to cause shielding and structural interference to the switching piece connection operation, therefore, can reduce the assembly degree of difficulty, promote assembly efficiency to and, can promote the connection effect of switching piece and utmost point post and utmost point ear, thereby promote the security performance of battery.

Drawings

For a better understanding of the utility model, 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 utility model. In addition, the relevant elements or components may have different arrangements as known in the art. Furthermore, in the drawings, like reference numerals designate identical or similar parts throughout the several views. Wherein:

fig. 1 is a schematic diagram of an explosion structure of a battery according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a portion of the structure of FIG. 1;

FIG. 3 is an exploded view of the structure of FIG. 2;

fig. 4 is a schematic view of the structure of fig. 3 at another angle.

The reference numerals are explained as follows:

100. a cover plate assembly; 110. a cover plate body; 120. an insulating member; 121. an insulating body; 122. a buckling part; 123. a clamping structure; 1231. a clamping groove; 1232. a clamping protrusion; 130. a pole; 200. a battery cell; 210. a cell body; 220. a tab portion; 300. a transfer sheet; 310. a first sheet body; 320. a second sheet body; 400. a housing member; s1, a first connection area; s2, a second connection area; A. a receiving chamber.

Detailed Description

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

In the description of the present utility model, 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 unless explicitly specified or limited otherwise; the term "plurality" refers to two or more than two; 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 likewise intended to mean one of a possible plurality of such objects.

Unless specified or indicated otherwise, the terms "connected," "fixed," and the like are to be construed broadly and are, for example, capable of being fixedly connected, detachably connected, or integrally connected, electrically connected, or signally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art according to the specific circumstances.

Further, in the description of the present utility model, it should be understood that the terms "upper", "lower", "inner", "outer", and the like in the exemplary embodiments of the present utility model are described in terms of the drawings, and should not be construed as limiting the exemplary embodiments of the present utility model. It will also be understood that in the context of an element or feature being connected to another element(s) "upper," "lower," or "inner," "outer," it can be directly connected to the other element(s) "upper," "lower," or "inner," "outer," or indirectly connected to the other element(s) "upper," "lower," or "inner," "outer" via intervening elements.

The embodiment of the utility model provides a battery. Fig. 1 is a schematic diagram of an explosion structure of a battery according to an embodiment of the present utility model; FIG. 2 is a schematic diagram of a portion of the structure of FIG. 1; FIG. 3 is an exploded view of the structure of FIG. 2; fig. 4 is a schematic view of the structure of fig. 3 at another angle. Referring to the structure shown in fig. 1 to 4, a battery according to an embodiment of the present utility model includes: the battery cell comprises a cover plate assembly 100, a battery cell 200 and a switching piece 300, wherein the cover plate assembly 100 comprises a cover plate body 110 and an insulating piece 120, the cover plate body 110 is provided with a pole 130, the insulating piece 120 is arranged on one side of the cover plate assembly 100 facing the battery cell 200, one side of the insulating piece 120 facing away from the cover plate body 110 is provided with a containing cavity A (shown in fig. 2), and an opening of the containing cavity A faces the battery cell 200; the battery cell 200 comprises a battery cell body 210 and a tab part 220 led out from the battery cell body 210, wherein the tab part 220 is connected with the pole 130 through a switching piece 300;

as shown in fig. 2 and 3, the insulating member 120 includes an insulating body 121 and a fastening portion 122 that are detachably connected, where the insulating body 121 has a side opening at an edge of at least one side facing away from the cover body 110, and the fastening portion 122 fastens the side opening to form a receiving cavity a;

as shown in fig. 3, the tab 300 has a first state and a second state, and when the tab 300 is in the first state, a portion of the tab 300 protrudes from the side opening to connect the tab portion 220; when the adapter piece 300 is in the second state, a part of the adapter piece 300 protruding out of the accommodating cavity a from the side opening is at least partially folded into the accommodating cavity a.

Specifically, in the battery provided by the embodiment of the utility model, the insulating member 120 includes an insulating body 121 and a buckling portion 122, the buckling portion 122 is detachably connected with the insulating body 121, and the buckling portion 122 can be adopted to buckle or open a side opening on the insulating body 121 according to requirements; the tab 220 of the battery cell 200 is connected to the post 130 disposed on the cover plate body 110 through the switching piece 300, specifically, the switching piece 300 is connected to the post 130 exposed in the accommodating cavity a on one side of the insulating piece 120 away from the cover plate body 110, and the switching piece 300 has a first state and a second state, when the switching piece 300 is in the first state, part of the switching piece 300 can protrude out of the accommodating cavity a from the side opening of the insulating body 121, so as to facilitate the connection operation between the switching piece 300 and the tab 220; when the adaptor 300 is in the second state, the adaptor 300 protruding from the side opening is bent back to the corresponding position of the accommodating cavity a, and the tab portion 220 and the adaptor 300 are connected to each other through the accommodating cavity a toward the opening of the battery cell 200.

It is noted that the portion of the adapter piece 300 in the second state protruding from the side opening is already separated from the side opening, so that the fastening portion 122 can perform the fastening operation on the side opening. And in a second state, the adaptor tab 300 is at least partially disposed within the receiving cavity a. In general, the adaptor 300 can be folded and completely folded in the accommodating cavity a after being connected with the tab portion 220, so as to ensure insulation performance and reduce short circuit risk. Alternatively, the adaptor 300 may extend out of the accommodating cavity a from the opening at least partially to connect the tab portion 220, and adapt to the structural configuration of the tab portion 220, so as to reduce the design and installation difficulty.

It should be noted that, in the battery provided in the embodiment of the present utility model, the insulation body 121 and the buckling portion 122 are designed in a split type and are connected in a detachable manner, so that the two states of the switching piece 300 can be matched, and after the switching piece 300 is connected with the pole 130, a part of the switching piece 300 is pulled out of the accommodating cavity a from the side opening of the insulation body 121, so as to perform the welding operation of the switching piece 300 and the pole ear 220; after the welding is completed, the adaptor 300 is bent back to the corresponding position of the accommodating cavity a, and then the buckling part 122 is adopted to buckle the side opening, so that the complete accommodating cavity a is formed. The structural design in this embodiment can avoid the blocking and interference of the buckling portion 122 to the connection operation of the adapter plate 300, so as to reduce the assembly difficulty, improve the assembly efficiency, and improve the connection effect of the adapter plate 300, the pole 130 and the pole ear 220, thereby improving the safety performance of the battery.

In one embodiment, please continue to refer to the structure shown in fig. 2 and 3, along the extending direction of the switch plate 300, the switch plate 300 is provided with a first connection region S1 and a second connection region S2, which are independently disposed, wherein the first connection region S1 is connected to the pole 130, and the second connection region S2 is connected to the pole ear 220. It should be understood that the first connection area S1 and the second connection area S2 are only exemplary in fig. 2 to 3, and the specific shape and the specific area can be set according to the requirement, which is not described herein again.

In the structure shown in fig. 2 and 3, in this embodiment, the tab 300 is connected to the pole 130 and the tab portion 220 at different positions, specifically, the tab 300 is welded to the pole 130 at the first connection area S1 and the tab portion 220 at the second connection area S2. When the adapter plate 300 adopts two connection areas to connect the pole 130 and the pole ear 220 respectively, the structure can reasonably utilize the internal space of the battery, so as to improve the space utilization rate in the battery and further improve the energy density of the battery. In addition, the structural arrangement can avoid the switching piece 300 from being torn in the process of welding the pole 130 and the pole lug part 220 for many times at the same position, and can improve the stability of an electric connection path among the pole lug part 220, the switching piece 300 and the pole 130, thereby improving the safety performance of the battery.

In one embodiment, referring to the structure shown in fig. 3 in conjunction with fig. 2, the second connection region S2 may be bent relative to the first connection region S1, and at least a portion of the second connection region S2 may protrude from the side opening of the insulating body 121 to the outside of the accommodating cavity a. This structure sets up and can avoid buckling parts 122 to cause shielding and interference to the operation of being connected to the changeover tab 300, therefore, can reduce the assembly degree of difficulty, promote assembly efficiency to and, can promote the connection effect of changeover tab 300 and utmost point post 130 and utmost point ear 220, thereby promote the security performance of battery.

Specifically, with continued reference to the structure shown in fig. 3, before the fastening portion 122 is mounted on the surface of the insulating body 121, the switching piece 300 and the tab portion 220 may be located at the position of the dashed line in fig. 3, at this time, the switching piece 300 and the pole 130 may be connected by using an external welding device, and the switching piece 300 and the tab portion 220 may be connected by using an external welding device. Specifically, as shown in fig. 3, since the fastening portion 122 is not installed, the welding head of the external welding device may extend into the accommodating cavity a to weld the pole 130 and the adapter plate 300, so as to reduce the welding difficulty, improve the assembly efficiency, and improve the connection effect of the adapter plate 300 and the pole 130; meanwhile, since the fastening part 122 is not installed, the adapter piece 300 can extend out of the accommodating cavity a from the side opening, so as to perform welding operation with the tab part 220 outside the accommodating cavity a, reduce welding difficulty, improve assembly efficiency, and improve connection effect of the adapter piece 300 and the tab part 220.

It should be noted that after the welding operation of the tab 300 and the tab portion 220 and the post 130 is completed, the tab 300 may be bent, for example, along the direction of the dashed arrow in fig. 3, so that at least a portion of the tab portion 220 and the tab 300 is folded into the accommodating cavity a, so that the fastening portion 122 is mounted to the insulation body 121 to form the structure in fig. 2.

In one embodiment, please continue to refer to the structure shown in fig. 2 to 4, the patch 300 includes a first sheet 310 and a second sheet 320, where the first sheet 310 and the second sheet 320 are overlapped, and the following steps are:

the first sheet 310 and the second sheet 320 that are overlapped are sandwiched between opposite sides of the tab portion 220, and the first sheet 310 and the second sheet 320 are connected to the tab portion 220 in the second connection region S2;

the first sheet 310 and the second sheet 320, which are overlapped, are partially fixed in the first connection region S1 and connected to the pole 130.

It should be noted that, the first sheet 310 and the second sheet 320 clamp the tab portion 220 and are connected with the tab portion 220, so that connection reliability of the switching piece 300 and the tab portion 220 can be ensured, and stability of a current transmission path among the tab portion 220, the switching piece 300 and the pole 130 in the battery is further improved, thereby improving service performance of the battery.

In one embodiment, first sheet 310 is ultrasonically welded to tab portion 220; and/or the number of the groups of groups,

the second sheet 320 is ultrasonically welded to the tab portion 220.

It should be noted that the ultrasonic welding has the advantages of high welding speed, high efficiency, low cost and stable quality, and can improve the connection reliability between the first sheet 310 and/or the second sheet 320 and the tab 220.

In one embodiment, tab portion 220 comprises a plurality of stacked tab pieces.

It should be noted that, the pole piece is wound or overlapped to form the battery core body 210, during the winding or overlapping process of the pole piece, the tab piece is also wound or overlapped at any time, the first sheet body 310 in the adapter piece 300 is clamped at one side of the tab piece 220, the second sheet body 320 in the adapter piece 300 is clamped at the opposite side of the tab piece 220, the structure can improve the electrical connection effect of the adapter piece 300 and the tab piece 220, and ensure the connection firmness of the adapter piece 300 and the tab piece 220, so as to improve the connection stability among the tab piece 220, the adapter piece 300 and the pole post 130, and further improve the service life and the safety performance of the battery.

As shown in fig. 1 to 4, the cover assembly 100 is in a cuboid shape, and by way of example, the short side extending direction of the cover body 110 is parallel to the direction X, the long side extending direction of the cover body 110 is parallel to the direction Y, and the thickness direction of the cover body 110 is parallel to the direction Z, wherein the direction X, the direction Y, and the direction Z are perpendicular to each other.

In one embodiment, the insulating body 121 has a rectangular parallelepiped shape. It is noted that the side opening on the insulating body 121 may be located on the short side and/or long side of the insulating body 121.

In a specific embodiment, the buckling portion 122 is located on the long side of the insulating member 120. When the insulating body 121 is in a cuboid shape, the dimension of the insulating body 121 on the long side is larger, the side opening is arranged on the long side of the insulating body 121, so that external welding equipment can conveniently extend into the accommodating cavity A to carry out welding operation on the adapter piece 300 and the pole post 130, meanwhile, the lug part 220 and the adapter piece 300 can conveniently extend out of the accommodating cavity A from the side opening to carry out welding operation, and the lug part 220 is prevented from being scraped and rubbed with the insulating body 121 in the bending process of the adapter piece 300, so that the safety performance of a battery can be improved.

In realizing the detachable connection function of the insulating body 121 and the fastening part 122, various structural forms may be adopted.

In one embodiment, a clamping structure 123 is disposed between the fastening portion 122 and the insulating body 121, and the fastening portion 122 and the insulating body 121 are connected by the clamping structure 123. Through the structural design in this embodiment, the connection stability of the buckling portion 122 and the insulating body 121 can be ensured, and meanwhile, the convenient and rapid disassembly and assembly of the buckling portion 122 and the insulating body 121 can be conveniently realized.

In a specific embodiment, the clamping structure 123 includes a clamping groove 1231 and a clamping protrusion 1232, the clamping groove 1231 is in clamping fit with the clamping protrusion 1232, the clamping groove 1231 is disposed on one of the buckling portion 122 and the insulating body 121, and the clamping protrusion 1232 is disposed on the other of the buckling portion 122 and the insulating body 121.

As shown in fig. 3 and 4, an example is shown in which a locking groove 1231 is provided in the insulating body 121 and a locking protrusion 1232 is provided in the locking portion 122. In fig. 3 and fig. 4, the number of the clamping structures 123 between the fastening portion 122 and the insulating body 121 is two, and the two clamping structures are arranged at intervals along the direction Y, so as to improve the relative stability of the fastening portion 122 and the insulating body 121 after assembly.

It should be noted that the number and arrangement positions of the fastening portions 122 between the fastening portions 122 and the insulating body 121 are not limited to those shown in fig. 3 and fig. 4, and may be set according to the requirements, and are not described herein.

Referring to fig. 3 and fig. 4, in each set of the clamping structures 123, the clamping groove 1231 is disposed on the insulating body 121, specifically, the insulating body 121 has a plate body on a side facing the buckling portion 122, the plate body is provided with a hole structure, the hole structure forms the clamping groove 1231, and a side of the plate body facing away from the buckling portion 122 forms a limiting surface; the engaging protrusion 1232 includes two protruding portions, and a space exists between the two protruding portions, so that when the engaging protrusion 1232 is placed in the engaging groove 1231, the two protruding portions can approach each other to enter the inside of the engaging groove 1231 in a reduced size; the two protruding parts restore to be spaced inside the clamping groove 1231, and the head part of one side of each protruding part deviating from the buckling part 122 has larger size, so that the head part can be clamped on the limit surface around the clamping groove 1231, and the buckling part 122 is prevented from falling off from the insulating body 121, so that the stability of the two parts after assembly can be improved.

Of course, the two protruding portions may be formed integrally, or other arrangements of the fastening structure 123 may be provided, which will not be described in detail.

In other embodiments, the fastening portion 122 and the insulating body 121 may be detachably connected by other means, such as, but not limited to, adhesive connection or connection via a connector, but not limited to this embodiment.

In one embodiment, please continue to refer to the structure shown in fig. 1, the battery provided by the embodiment of the present utility model further includes a housing member 400, and at least one opening is formed on two opposite sides of the housing member 400; a cover plate component 100 is buckled at the opening; the battery cell 200 is disposed within the housing member 400 and the tab portion 220 is connected to the post 130 on the cover assembly 100 via the tab 300. Specifically, in the cover assembly 100, the insulating member 120 extends into the housing member 400 from the opening, and the cover body 110 is buckled with the opening to seal the battery cell 200 in cooperation with the insulating member 120.

It should be understood that the housing member 400 may have only one opening, in which case the cover assembly 100 snaps into the opening; alternatively, the opposite sides of the housing member 400 are provided with openings, and the number of the cover plate assemblies 100 is two, and each cover plate assembly 100 is used to fasten one opening.

Note that, the battery is a minimum unit capable of performing an electrochemical reaction such as charge/discharge; the battery cell 200 is placed in the case member 400 and filled with an electrolyte. The battery cell 200 comprises a battery cell body 210 and a tab part 220 led out from the battery cell body 210, wherein the battery cell body 210 is formed by winding or stacking pole pieces; the number of tab portions 220 is typically two, and two tab portions 220 may be led out from one side of the cell body 210 or from opposite sides of the cell body 210. Wherein one of the tab portions 220 has a negative polarity and the other tab portion 220 has a positive polarity.

In one embodiment, the housing member 400 has two openings, each of which is snapped with a cover assembly 100; the cell 200 includes two tab portions 220, the two tab portions 220 leading from opposite sides of the cell body 210, each tab portion 220 being connected to a pole 130 on a corresponding cover assembly 100 by a tab 300.

When two cover plate assemblies 100 are specifically provided, only one insulating member 120 in one cover plate assembly 100 may be provided to include an insulating body 121 and a fastening portion 122; of course, the insulating members 120 in the two cover plate assemblies 100 can also include the insulating body 121 and the buckling parts 122, when the adapter piece 300 on each side is connected with the corresponding pole 130 and the corresponding pole ear 220, the buckling parts 122 can be detached from the insulating body 121 to avoid, so that the assembly difficulty is reduced, the assembly efficiency is improved, and the connection effect of the adapter piece 300 and the pole 130 and the pole ear 220 can be improved, so that the safety performance of the battery is improved.

In assembling the battery provided by the embodiment of the utility model, the tab portion 220 is placed between the first sheet 310 and the second sheet 320, clamped by a clamp, and then welded; when the welding operation is completed, the cover plate assembly 100 is assembled to the housing member 400, and at this time, the second connection region S2 of the adapter piece 300 is folded and accommodated inside the accommodating cavity a and the housing member 400.

In a second aspect, an embodiment of the present utility model further provides a battery device. The battery device comprises a battery as provided in any of the above-described first aspects.

It should be noted that, in the battery device provided in the embodiment of the present utility model, the insulation body 121 and the buckling portion 122 are designed in a split type, and are connected in a detachable manner, so that the two states of the switching piece 300 can be matched, after the switching piece 300 is connected with the pole 130, a part of the switching piece 300 is pulled out of the accommodating cavity a from the side opening of the insulation body 121, so as to perform the welding operation of the switching piece 300 and the pole ear 220; after the welding is completed, the adaptor 300 is bent back to the corresponding position of the accommodating cavity a, and then the buckling part 122 is adopted to buckle the side opening, so that the complete accommodating cavity a is formed. The structural design in this embodiment can avoid the blocking and interference of the buckling portion 122 to the connection operation of the adapter plate 300, so as to reduce the assembly difficulty, improve the assembly efficiency, and improve the connection effect of the adapter plate 300, the pole 130 and the pole ear 220, thereby improving the safety performance of the battery.

Of course, the battery device provided in the embodiment of the present utility model further includes other structures, and the exemplary battery device further includes a case, the battery is disposed inside the case, and the two poles 130 in the battery face the side wall of the case, which is not described in detail.

Other embodiments of the utility model will be apparent to those skilled in the art from consideration of the specification and practice of the utility model disclosed herein. This utility model is intended to cover any variations, uses, or adaptations of the utility model following, in general, the principles of the utility model and including such departures from the present disclosure as come within known or customary practice within the art to which the utility model pertains. The specification and example embodiments are to be considered exemplary only, with a true scope and spirit of the utility model being indicated by the following claims. It is to be understood that the utility model is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the utility model is limited only by the appended claims.

Claims (10)

1. A battery, comprising: the battery cell comprises a cover plate assembly, a battery cell and a switching piece, wherein the cover plate assembly comprises a cover plate body and an insulating piece, the cover plate body is provided with a pole, the insulating piece is arranged on one side, facing towards the battery cell, of the cover plate assembly, a containing cavity is formed in one side, facing away from the cover plate body, of the insulating piece, and the containing cavity is provided with an opening, and the opening faces towards the battery cell; the battery cell comprises a battery cell body and a pole lug part led out from the battery cell body, and the pole lug part is connected with the pole post through the switching piece;

the insulating piece comprises an insulating body and a buckling part which are detachably connected, wherein a side opening is formed in the edge of at least one side, facing away from the cover plate body, of the insulating body, and the buckling part buckles the side opening to form the accommodating cavity;

the switching piece is provided with a first state and a second state, when the switching piece is in the first state, part of the switching piece protrudes out of the side opening to be connected with the lug part; when the transfer sheet is in the second state, part of the transfer sheet protruding out of the accommodating cavity from the side opening is at least partially folded into the accommodating cavity.

2. The battery of claim 1, wherein the tab is provided with first and second connection regions independently disposed along an extension direction of the tab, the first connection region connecting the pole and the second connection region connecting the tab portion.

3. The battery of claim 2, wherein the second connection region is bendable relative to the first connection region, and at least a portion of the second connection region protrudes from the side opening of the insulating body to outside the receiving chamber.

4. The battery of claim 2 or 3, wherein the adapter tab comprises a first tab and a second tab, the first tab overlapping the second tab, wherein:

the first sheet body and the second sheet body which are overlapped are clamped at two opposite sides of the lug part, and the first sheet body and the second sheet body are connected with the lug part in the second connecting area;

the first sheet body and the second sheet body which are overlapped are partially fixed in the first connecting area and are connected with the pole.

5. The battery of claim 4, wherein the first sheet and the tab portion are ultrasonically welded; and/or the number of the groups of groups,

the second sheet body and the lug part are welded through ultrasonic waves.

6. The battery according to any one of claims 1 to 3, wherein the insulating body has a rectangular parallelepiped shape, and the engaging portion is engaged with a long side of the insulating body.

7. A battery according to any one of claims 1 to 3, wherein a locking structure is provided between the locking portion and the insulating body, and the locking portion and the insulating body are connected by the locking structure.

8. A battery according to any one of claims 1 to 3, wherein the fastening portion is adhesively connected to the insulating body; or alternatively, the process may be performed,

a connecting piece is arranged between the buckling part and the insulating body, and the buckling part is connected with the insulating body through the connecting piece.

9. The battery of any of claims 1-3, further comprising a housing member having at least one opening to which one of the cover assemblies is snap-fit;

the battery cell is arranged in the shell part, and the lug part is connected with the pole post on the cover plate component through the switching piece.

10. A battery device comprising a battery as claimed in any one of claims 1 to 9.