CN220042209U - 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, wherein the battery comprises: the battery comprises a battery shell, a battery core assembly and a supporting piece, wherein the battery shell comprises a cover plate assembly, the battery core assembly is positioned in the battery shell, and the battery core assembly comprises a battery core body and a tab; the support piece is positioned between the cover plate assembly and the battery cell body and comprises a support part and a bearing part, and the support part is arranged in a protruding way relative to the bearing part and faces the battery cell body; the electrode lug is bent from the battery cell body and extends to one side of the bearing surface facing the cover plate component; the dimension of the battery in the width direction is D1, the dimension of the carrying part in the width direction of the battery is D2, and D2/D1 is more than or equal to 0.1 and less than or equal to 0.8. The battery provided by the disclosure can solve the problem that the battery core is damaged due to the fact that the tab is reversely inserted into the battery core body.

Description

Battery and battery device

Technical Field

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

Background

In the related art, the battery comprises a battery core, the battery core comprises a battery core body and a tab, and the tab is led out from the battery core body and is electrically connected with a battery pole and the like, so that current is led out. In the battery assembly process, the cover plate component needs to be buckled on the main shell, and the lug led out from the battery cell body needs to be bent, so that the space of the main shell occupied by the lug is reduced, and the lug is easy to reversely insert into the battery cell body in the bending process so as to damage the battery cell body. Especially, along with the increase of the lifting demand for the capacity of a single battery, the thickness of the battery core body is increased, the thickness of the led tab is also gradually thickened, and the risk that the tab is bent and reversely inserted into the battery core body is increased.

It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of Invention

The utility model provides a battery which can solve the technical problem that a battery core body is damaged due to the fact that a tab is reversely inserted into the battery core body.

The battery includes:

a battery housing including a cover plate assembly;

the battery cell assembly is positioned in the battery shell and comprises a battery cell body and a tab;

the support piece is positioned between the cover plate assembly and the battery cell body and comprises a support part and a bearing part, and the support part is arranged in a protruding way relative to the bearing part and faces the battery cell body;

the electrode lugs are bent and extend from the battery cell body to one side of the bearing part facing the cover plate assembly;

the dimension of the battery in the width direction is D1, the dimension of the bearing part in the width direction of the battery is D2, and D2/D1 is more than or equal to 0.1 and less than or equal to 0.8.

On the one hand, the bearing part can be used for bearing the lug which is bent and extends to one side of the support piece facing the cover plate component, and the bearing part can prevent the lug from being reversely inserted into the battery cell body, so that the risk that the battery cell body is easily damaged by the reverse insertion of the lug can be improved. On the other hand, the thickness of the battery cell body is increased, after the number of layers of the electrode lugs is increased, after the electrode lugs with more layers are bent, the phenomenon of electrode lug staggered layers is more serious, and if the width of the bearing part is too small, the electrode lugs cannot be well supported, and the electrode lugs are easy to be reversely inserted into the battery cell body. Meanwhile, besides supporting the electrode lug, the supporting piece can also abut against the battery cell body through the supporting part, the bearing part is too wide, the size of the supporting part which can be used for abutting against the battery cell body is reduced, the abutting effect on the battery cell body is poor, and the supporting piece is easy to incline in the battery shell. According to the utility model, the D2/D1 is set to be a proper value, so that the battery cannot have an effective bearing effect on the electrode lugs due to too small D2, meanwhile, the supporting part can be abutted with the battery core body, and the battery cannot reduce the setting space of the supporting part due to too large D2, thereby causing poor abutting effect of the supporting part on the battery core body.

The utility model also provides a battery device which comprises the battery, the battery can improve the technical problem of the battery cell body with the inverted tab, and the battery device has good safety and stability correspondingly.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

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 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 assembled structure of an exemplary embodiment of a battery of the present disclosure;

FIG. 2 is a schematic view of a support and tab from one perspective in an exemplary embodiment of a battery of the present disclosure;

FIG. 3 is a schematic view of a support and tab from another perspective in an exemplary embodiment of a battery of the present disclosure;

FIG. 4 is a schematic view of a support and tab from another perspective in an exemplary embodiment of a battery of the present disclosure;

FIG. 5 is a schematic view of the structure of a support member from one perspective in an exemplary embodiment of a battery of the present disclosure;

FIG. 6 is a schematic view of a structure of another view of a support member in an exemplary embodiment of a battery of the present disclosure;

FIG. 7 is a schematic view of an assembly process in an exemplary embodiment of a battery of the present disclosure;

fig. 8 is a schematic view of an assembled structure of a cover plate assembly and a support member in an exemplary embodiment of a battery of the present disclosure.

Reference numerals illustrate:

1. a cover plate assembly; 2. a cell assembly; 3. a support; 8. a main housing; 11. a cover plate body; 12. an insulating member; 21. a cell body; 22 pole ears; 31. a support part; 32. a carrying part; 41. a first gap; 42. a second gap; 51. a first groove; 221. a first extension; 222. a second extension; 223. a bending part; 311. a first side; 312. a second side; 313. and a third side.

Detailed Description

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying 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, 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/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 terms in the present disclosure may be understood by those skilled in the art according to the specific circumstances.

Further, in the description of the present disclosure, it should be understood that the terms "upper", "lower", "inner", "outer", and the like, as described in the example embodiments of the present disclosure, are described with the angles shown in the drawings, and should not be construed as limiting the example embodiments of the present disclosure. It will also be understood that in the context of an element or feature being "on," "under," or "in" or "out" of another element or feature being "on," "under" or "in" or "out" of the other element or elements, it can be directly connected to the other element or elements, or indirectly connected to the other element or elements via intervening elements.

The present exemplary embodiment first provides a battery, as shown in fig. 1-6, fig. 1 is a schematic diagram of an assembled structure of an exemplary embodiment of the battery of the present disclosure, fig. 2 is a schematic diagram of a view angle of a support member and a tab of an exemplary embodiment of the battery of the present disclosure, fig. 3 is a schematic diagram of another view angle of a support member and a tab of an exemplary embodiment of the battery of the present disclosure, fig. 4 is a schematic diagram of another view angle of a support member and a tab of an exemplary embodiment of the battery of the present disclosure, fig. 5 is a schematic diagram of a view angle of a support member of an exemplary embodiment of the battery of the present disclosure, and fig. 6 is a schematic diagram of another view angle of a support member of an exemplary embodiment of the battery of the present disclosure.

The battery includes: the battery comprises a battery shell, a battery cell assembly 2 and a supporting piece 3, wherein the battery shell comprises a cover plate assembly 1, the battery cell assembly is positioned in the battery shell, and the battery cell assembly 2 comprises a battery cell body 21 and a tab 22; a supporting member 3 is located between the cover plate assembly 1 and the cell body 21, the supporting member 3 includes a supporting portion 31 and a bearing portion 32, and the supporting portion 31 is arranged to face the cell body 21 in a protruding manner with respect to the bearing portion 32; the tab 22 is bent from the battery core body 21 to extend to a side of the bearing portion 32 facing the cover plate assembly 1; the dimension of the battery in the width direction X thereof is D1, and the dimension of the carrying portion 32 in the width direction X thereof is D2, with D2/D1 being 0.1 or more and 0.8 or less.

On the one hand, the carrying portion 32 in the present exemplary embodiment may be configured to carry the tab 22 bent and extended to the side of the support member 3 facing the cover plate assembly 1, and the carrying portion 32 may block the tab 22 from being inserted into the cell body 21, so that the present exemplary embodiment may improve the risk that the cell body 21 is easily damaged by the tab 22 being inserted. On the other hand, the thickness of the battery cell body is increased, after the number of layers of the electrode lugs is increased, after the electrode lugs with more layers are bent, the phenomenon of electrode lug staggered layers is more serious, and if the width of the bearing part is too small, the electrode lugs cannot be well supported, and the electrode lugs are easy to be reversely inserted into the battery cell body. Meanwhile, besides supporting the electrode lug, the supporting piece can also abut against the battery cell body through the supporting part, the bearing part is too wide, the size of the supporting part which can be used for abutting against the battery cell body is reduced, the abutting effect on the battery cell body is poor, and the supporting piece is easy to incline in the battery shell. In the utility model, the D2/D1 is set to be a proper value, so that the battery cannot cause that the bearing part 32 cannot effectively bear the pole lug 22 due to too small D2, meanwhile, the supporting part 31 can be abutted with the battery core body 21, and the battery cannot cause that the setting space of the supporting part 31 is reduced due to too large D2, thereby causing poor abutting effect of the supporting part 31 on the battery core body 21.

The carrying portion 32 may be in contact with the tab 22, and a gap may be provided between the carrying portion 32 and the tab 22. Similarly, the support portion 31 may be in contact with the cell body 21, and a gap may be provided between the support portion 31 and the cell body 21.

In the present exemplary embodiment, D2/D1 may be equal to 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, etc. D2/D1 may preferably be 1/4-2/3, e.g., D2/D1 may be equal to 1/4, 1/3, 1/2, 2/3, etc. As shown in fig. 1-6, the battery case further includes a main case 8, an opening is formed on the main case 8, the cover assembly 1 is used for sealing the opening of the main case 8, and the cover assembly 1 may include one or more of a sealing member, an upper plastic member, a lower plastic member, and a cover main body. In the present exemplary embodiment, the distribution direction of the cover plate assembly 1 and the battery cell assembly 2 is the height direction of the battery, the width direction X and the length direction Y of the battery are perpendicular to the height direction of the battery, and the width of the battery is smaller than the length of the battery.

In the present exemplary embodiment, as shown in fig. 1 to 6, the supporting member 3 includes a protruding portion facing the side of the cell assembly 2, the protruding portion forming the supporting portion 31. In this exemplary embodiment, a first groove 51 may be formed on a side of the support 31 facing away from the battery cell. On the one hand, due to the fact that the air thermal resistance is large, the heat conduction quantity of heating structures such as polar columns to the battery cell body 21 through the supporting piece 3 can be reduced, and therefore the risk of damage of the battery cell body 21 due to high temperature can be reduced; on the other hand, this arrangement also reduces the overall mass of the support 3, saving material for the support 3. It should be appreciated that in other exemplary embodiments, the support 31 may also be a solid structure.

In the present exemplary embodiment, as shown in fig. 1 to 6, the support 31 may include a first support 9, the first support 9 extending in the length direction Y of the battery; the support 3 comprises a first flanging 81 and a second flanging 82 which are oppositely arranged in the width direction X of the battery, the first flanging 81 and the second flanging 82 are connected to one side of the first support part 9 far away from the battery cell body 21, and the first flanging 81 and the second flanging 82 are respectively outwards turned along the width direction X of the battery towards one side far away from the first support part 9; the first flange 81 and the second flange 82 form at least part of the structure of the carrier 32; the dimension of the carrying portion 32 in the width direction X of the battery is equal to the dimension of the first flange 81 in the width direction X of the battery; or, the dimension of the carrying portion 32 in the width direction X of the battery is equal to the dimension of the second burring 82 in the width direction X of the battery.

In the present exemplary embodiment, the dimension of the first flange 81 in the battery width direction X and the dimension of the second flange 82 in the battery width direction X may be the same. It should be understood that in other exemplary embodiments, the dimension of the first flange 81 in the cell width direction X and the dimension of the second flange 82 in the cell width direction X may be set to different dimensions according to actual needs.

In this exemplary embodiment, the bearing portion 32 of the flanging structure may form a gap with the battery cell body 21, and the tab led out from the battery cell body 21 and located between the support member 3 and the battery cell body 21 may be disposed in the gap, which may reduce the risk of the support member 3 damaging the tab by extrusion. In this exemplary embodiment, the first flange 81 and the second flange 82 may be symmetrically disposed, and accordingly, one tab 22 in the battery cell assembly 2 may be bent and extended from the outer side of the first flange 81 to the side of the first flange 81 facing the cover plate assembly 1, and the other tab 22 in the battery cell assembly 2 may be bent and extended from the outer side of the second flange 82 to the side of the second flange 82 facing the cover plate assembly 1.

In this exemplary embodiment, as shown in fig. 1 to 6, the tab 22 may include: the first extending part 221, the second extending part 222 and the bending part 223, wherein the first extending part 221 is led out from the battery cell body 21 and is positioned at one side of the supporting piece 3 facing the battery cell body 21; the second extension 222 is located at the side of the support 3 facing away from the cell body 21; the bending part 223 is connected between the first extension part 221 and the second extension part 222; wherein the bent portion 223 is located at one side of the support 3 in the width direction X of the battery. This arrangement allows the tab 22 to be folded and extended to the side of the support 3 facing the cover plate assembly 1.

In this exemplary embodiment, as shown in fig. 1 to 6, the supporting portion 31 may include a first side 311 facing the battery cell body 21, and a second side 312 adjacent to the first side 311, the second side 312 extending along the battery length direction Y, and an included angle between the bending axis direction of the tab 22 and the battery length direction Y is greater than or equal to 0 ° and less than or equal to 10 °, for example, an included angle between the bending axis direction of the tab 22 and the battery length direction Y is equal to 0 °, 1 °, 2 °, 3 °, 4 °, 5 °, 6 °, 7 °, 8 °, 9 °, 10 °, or the like. Wherein, in the cell width direction X, a first gap 41 is provided between an end of the tab 22 opposite to the second side surface 312 and the second side surface 312. In the battery width direction X, the end of the tab 22 opposite to the second side 312 may be understood as an end of the tab 22 that is moved in the battery width direction X toward the second side 312 and intersects the second side 312. This arrangement can avoid damage to the tab 22 by abutment with the second side 312.

As shown in fig. 7, a schematic diagram of an assembly process in an exemplary embodiment of a battery of the present disclosure is shown. The cell assembly 2 may include two cell bodies 21, and during the assembly process of the battery, first, the sides of the two cell bodies 21, which are close to the cover plate assembly 1, may be oppositely disposed; then, the tab 22 may be welded with the structures such as the adapter plate, the pole, etc.; further, the support 3 may be placed at a position between the two cell bodies 21; finally, the two cell bodies 21 may be combined in the direction indicated by the arrow in fig. 7 so that the largest sides of the two cell bodies 21 are disposed opposite to each other.

In this exemplary embodiment, as shown in fig. 1 to 6, the supporting part 31 may further include a first side 311 facing the battery cell body, and a third side 313 adjacent to the first side 311, the third side 313 extending in the battery width direction X, and the bending axis of the tab 22 may be parallel to the length direction Y of the battery. In the battery longitudinal direction Y, a second gap 42 is formed between the end surface of the tab 22 opposite to the third side surface 313 and the third side surface 313. In the battery longitudinal direction Y, the end surface of the tab 22 opposite to the third side surface 313 may be understood as an end surface of the tab 22 facing the third side surface 313 and moving in the battery longitudinal direction Y to intersect the third side surface 313. The present exemplary embodiment reserves the second gap 42 between the tab 22 and the third side 313, and on the one hand, this arrangement can avoid the third side 313 from pressing the tab 22 to cause damage to the tab 22; on the other hand, this arrangement can facilitate the placement of the support 3 between the two cell bodies 21 in the above-described process steps, while also allowing a certain adjustment space between the support 3 and the tab 22.

It should be understood that, in other exemplary embodiments, due to process errors and the like, a slight angle may be formed between the bending axis direction of the tab 22 and the length direction Y of the battery, for example, an angle between the bending axis direction of the tab 22 and the length direction Y of the battery may be 0 ° or more and 10 ° or less, and an angle between the bending axis direction of the tab 22 and the length direction Y of the battery may be 0 °, 1 °, 2 °, 3 °, 4 °, 5 °, 6 °, 7 °, 8 °, 9 °, 10 ° or the like.

In this exemplary embodiment, as shown in fig. 1-6, the extending length from the end of the tab 22 near the battery core body 21 to the end far from the battery core body 21 is L1, and D2/L1 is greater than or equal to 0.15 and less than or equal to 0.5. For example, D2/L1 may be equal to 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, etc. In this exemplary embodiment, the extension length from the end of the tab 22 near the battery core body 21 to the end far away from the battery core body 21 is the dimension between the root of the side of the tab 22 near the battery core body 21 and the tail of the side far away from the battery core body 21 after the tab 22 is flattened. The present exemplary embodiment sets D2/L1 to a suitable value, and on the one hand, the carrying portion 32 does not cause it to be excessively narrow, so that the tab reverse insertion improvement effect is not obvious; on the other hand, the carrying portion 32 is not too wide to cause insufficient installation space of the supporting portion 31.

In this exemplary embodiment, as shown in fig. 1 to 6, the battery cell assembly 2 may include two battery cell bodies 21, and each battery cell body 21 is correspondingly provided with two tab 22: positive electrode tab and negative electrode tab. The cell body 21 is a pole piece portion coated with an active material. In addition, when the anode active material coating layer is higher than the cathode active material coating layer, the root portion of the single piece of anode tab constituting the anode tab is coated with tab glue to avoid the single piece of anode tab and the anode active material being positive, the extension length of the anode tab does not include the portion coated with tab glue.

In this exemplary embodiment, as shown in fig. 1-6, the side of the supporting portion 31 facing the battery core body 21 is in a planar structure, that is, the side of the supporting portion 31 facing the battery core body 21 is not provided with a structure of a protrusion or a groove, and a larger contact area can be provided between the side of the planar structure and the battery core body 21, and this arrangement can reduce the pressure of the supporting portion 31 on the battery core body 21 to reduce the risk of the battery core body 21 being damaged by extrusion, and meanwhile, this arrangement can also avoid the problem of uneven stress of the battery core body, so as to avoid the problem of lithium precipitation caused by misplacement of positive and negative electrode plates in the battery core body 21.

In the present exemplary embodiment, as shown in fig. 1 to 6, the side of the carrying portion 32 facing the tab 22 may also have a planar structure. Also, the arrangement can make the bearing capacity of the bearing part 32 on the tab 22 more uniform, so that the risk of damage to the tab 22 can be reduced.

In the present exemplary embodiment, as shown in fig. 8, a schematic view of an assembly structure of a cover plate assembly and a support member in an exemplary embodiment of a battery of the present disclosure is shown. The cover plate assembly 1 may include: the cover plate body 11, insulating part 12, the insulating part 12 set up in between cover plate body 11 and the support piece 3, insulating part 12 with support piece 3 fixed connection. For example, the insulator 12 may be snapped with the support 3. The present exemplary embodiment fixedly connects the insulating member 12 and the supporting member 3, so that the overall stability of the battery structure can be improved.

In this exemplary embodiment, a second groove may be formed on a side of the insulating member 12 facing the supporting member 3, and at least a part of the structure of the bearing portion in the supporting member 3 is disposed in the second groove. This arrangement can reduce the occupied space of the support 3, thereby improving the energy density of the battery.

In the present exemplary embodiment, the support member 3 may be an insulating structure, for example, the support member 3 and the insulating member 12 may be plastic members. It should be appreciated that in other exemplary embodiments, the support 3, insulator 12 may also be rubber, mica, ceramic, etc. materials.

In the present exemplary embodiment, the battery may be a lithium ion battery, it being understood that in other exemplary embodiments, the battery may also be a cadmium nickel battery, a nickel hydrogen battery, a lithium polymer battery, or the like.

In this exemplary embodiment, the battery may include a plurality of cell bodies, and the clearance between cell body and the cell body may be convenient for the cell body heat dissipation, especially in the battery that the calorific capacity is great such as quick charge battery, this setting can improve the heat dissipation rate of battery.

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

In this exemplary embodiment, the battery may be a square battery, that is, the battery may be a quadrangular battery, and the quadrangular battery mainly refers to a prismatic shape, but it is not strictly limited whether each side of the prism is necessarily a strictly defined straight line, and the corners between sides are not necessarily right angles, and may be arc transitions.

The battery can be a laminated battery, the laminated battery is convenient to group, and the battery with longer length can be obtained through processing. Specifically, the battery cell is a laminated battery cell, and the battery cell is provided with a first pole piece, a second pole piece opposite to the first pole piece and a diaphragm sheet arranged between the first pole piece and the second pole piece, which are mutually laminated, so that a plurality of pairs of the first pole piece and the second pole piece are stacked to form the laminated battery cell.

Alternatively, the battery may be a wound battery in which a first pole piece, a second pole piece opposite in electrical property to the first pole piece, and a separator sheet disposed between the first pole piece and the second pole piece are wound to obtain a wound battery cell. In the wound battery, a plurality of laminated single-piece tabs may be wound from the same pole piece.

The present exemplary embodiment also provides a battery device including the above battery and a case, the battery being disposed in the case, and a side of the battery provided with the cover plate assembly being disposed facing the bottom of the case.

The present exemplary embodiment inverts the battery and the heat of the battery is concentrated toward the bottom, so that the direct impact of the heat generated by the battery on the passenger compartment can be avoided. In addition, the opposite side surfaces of the cover plate component in the battery shell form the top surface of the battery, and the top surface of the battery is relatively flat, so that the heat plate and other structures can be conveniently replaced.

In addition, after the battery is inverted, the supporting piece can also play a role in supporting the battery core body, so that the battery core body is prevented from being pressed onto the cover plate assembly, and the risk that the battery core body presses the pole on the cover plate assembly can be reduced. Meanwhile, after the battery is inverted, the tab is easier to be inserted into the battery core body in an inverted mode, and the support plate can effectively improve the risk of the tab being inserted into the battery core body in an inverted mode.

The battery device may be 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 fixed a plurality of batteries.

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

It should be noted that the battery pack includes a plurality of batteries, and a plurality of batteries are disposed in the case. Wherein, a plurality of batteries can be installed in the box after forming the battery module. Or, a plurality of batteries can be directly arranged in the box body, namely, the plurality of batteries do not need to be grouped, and the plurality of batteries are fixed by the box body.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure 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 examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

The drawings in the present disclosure relate only to the structures to which the present disclosure relates, and other structures may be referred to in general. The embodiments of the present disclosure and features in the embodiments may be combined with each other to arrive at a new embodiment without conflict. It will be understood by those skilled in the art that various modifications and equivalent substitutions may be made to the disclosed embodiments without departing from the spirit and scope of the disclosed embodiments, which are intended to be encompassed within the scope of the appended claims.

It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (13)

1. A battery, the battery comprising:

a battery housing comprising a cover plate assembly (1);

the battery cell assembly (2) is positioned in the battery shell, and the battery cell assembly (2) comprises a battery cell body (21) and a tab (22);

the support piece (3) is positioned between the cover plate assembly (1) and the battery cell body (21), the support piece (3) comprises a support part (31) and a bearing part (32), and the support part (31) is arranged in a protruding way relative to the bearing part (32) and faces the battery cell body (21);

the electrode lug (22) is bent from the battery cell body (21) to extend to one side of the bearing part (32) facing the cover plate assembly (1);

the dimension of the battery in the width direction (X) is D1, and the dimension of the bearing part (32) in the width direction (X) of the battery is D2, wherein D2/D1 is more than or equal to 0.1 and less than or equal to 0.8.

2. The battery according to claim 1, wherein D2/D1 is 1/4 or more and 2/3 or less.

3. The battery according to claim 1, characterized in that the support (31) comprises a first support (9), the first support (9) extending in the length direction (Y) of the battery;

the support piece (3) comprises a first flanging (81) and a second flanging (82) which are oppositely arranged in the width direction (X) of the battery, the first flanging (81) and the second flanging (82) are connected to one side, far away from the battery core body (21), of the first support part (9), and the first flanging (81) and the second flanging (82) are outwards turned to one side, far away from the first support part (9), of the battery along the width direction (X) of the battery;

the first flange (81) and the second flange (82) form at least part of the structure of the carrier (32);

the dimension of the bearing part (32) in the width direction (X) of the battery is equal to the dimension of the first flanging (81) in the width direction (X) of the battery;

or, the dimension of the carrying portion (32) in the width direction (X) of the battery is equal to the dimension of the second flange (82) in the width direction (X) of the battery.

4. A battery according to claim 3, wherein the dimension of the first flange (81) in the battery width direction (X) is the same as the dimension of the second flange (82) in the battery width direction (X).

5. The battery according to claim 1, characterized in that the tab (22) comprises:

a first extension part (221) led out from the battery cell body (21) and positioned at one side of the supporting piece (3) facing the battery cell body (21);

a second extension (222) located on a side of the support (3) facing away from the cell body (21);

and a bending part (223) located at one side of the support (3) in the width direction (X) of the battery, the bending part (223) being connected between the first extension part (221) and the second extension part (222).

6. The battery according to any one of claims 1 to 5, wherein the support portion (31) includes a first side surface (311) facing the cell body (21), and a second side surface (312) intersecting the first side surface (311), the second side surface (312) extending in a longitudinal direction (Y) of the battery, an angle between a bending axis direction of the tab (22) and the longitudinal direction (Y) of the battery being 0 ° or more and 10 ° or less;

wherein a first gap (41) is provided between an end of the tab (22) opposite to the second side surface (312) and the second side surface (312) in the width direction (X) of the battery.

7. The battery according to any one of claims 1 to 5, wherein the support portion (31) includes a first side surface (311) facing the cell body (21), and a third side surface (313) intersecting the first side surface (311), the third side surface (313) extending in a width direction (X) of the battery, an angle between a bending axis direction of the tab (22) and a length direction (Y) of the battery being 0 ° or more and 10 ° or less;

wherein, in the length direction (Y) of the battery, a second gap (42) is arranged between the end surface of the tab (22) opposite to the third side surface (313) and the third side surface (313).

8. The battery according to any one of claims 1 to 5, wherein the tab (22) has an extension length L1 from an end near the cell body (21) to an end far from the cell body (21), D2/L1 being 0.15 or more and 0.5 or less.

9. The battery according to any one of claims 1 to 5, wherein the cap plate assembly (1) comprises:

a cover plate body (11);

the insulation piece (12), the insulation piece (12) set up in between apron body (11) and support piece (3), insulation piece (12) with support piece (3) fixed connection.

10. The battery according to claim 9, characterized in that the side of the insulating member (12) facing the support member (3) is formed with a second recess, in which at least part of the structure of the load-bearing part in the support member (3) is arranged.

11. The battery according to any one of claims 1 to 5, characterized in that the side of the support (31) facing the cell body (21) is of planar structure;

and/or the side surface of the bearing part (32) facing the tab (22) is of a plane structure.

12. A battery device, characterized in that it comprises a battery according to any one of claims 1-11.

13. The battery device according to claim 12, further comprising a case, wherein the battery is provided in the case, and wherein a side of the battery provided with the cover plate assembly (1) is provided facing the bottom of the case.