CN217589369U - Battery with a battery cell - Google Patents

Abstract

The utility model relates to a battery technology field provides a battery, include: a battery case; the battery comprises a battery cell, a battery shell and a battery cover, wherein the battery cell is arranged in the battery shell and comprises a battery cell main body and a tab part, and the tab part extends out from the side surface of the battery cell main body along a first direction; the insulating film, the insulating film covers electric core main part, and the one end of insulating film surpasss electric core main part setting along the first direction to be used for the insulation of utmost point ear portion and battery case. Through making the insulating film cover electric core main part to the one end of insulating film surpasss electric core main part setting along the first direction, thereby can make the partly that has the insulating film between utmost point ear and the battery case, consequently can effectively guarantee to form insulating setting between utmost point ear and the battery case, with this security performance who improves the battery.

Description

Battery with a battery cell

Technical Field

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

Background

In the related art, an insulating film is disposed between a battery cell and a casing of a battery to prevent short circuit risk caused by electrical connection between the battery cell and the casing. However, the tab portion of the battery cell needs to be formed by folding a plurality of single tabs, and there is a risk of insulation failure between the tab portion and the casing.

SUMMERY OF THE UTILITY MODEL

The utility model provides a battery to improve the performance of battery.

The utility model provides a battery, include:

a battery case;

the battery comprises a battery cell, a battery shell and a battery cover, wherein the battery cell is arranged in the battery shell and comprises a battery cell main body and a tab part, and the tab part extends out from the side surface of the battery cell main body along a first direction;

and the insulating film covers the battery core main body, and one end of the insulating film exceeds the battery core main body along the first direction so as to insulate the lug part and the battery shell.

The utility model discloses battery includes battery housing, electric core and insulating film, and the insulating film realizes insulating battery housing and electric core. Through making the insulating film cover electric core main part to the one end of insulating film surpasss electric core main part setting along the first direction, thereby can make the partly that has the insulating film between utmost point ear and the battery case, consequently can effectively guarantee to form insulating setting between utmost point ear and the battery case, with this security performance who improves the battery.

Drawings

For a better understanding of the present disclosure, reference may be made to the embodiments illustrated in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, the relevant elements or components may be arranged differently as is known in the art. Further, in the drawings, like reference characters designate the same or similar parts throughout the several views. Wherein:

FIG. 1 is a schematic diagram of a battery shown in accordance with an exemplary embodiment;

FIG. 2 is a schematic diagram illustrating a partially exploded structure of a battery according to an exemplary embodiment;

FIG. 3 is a schematic diagram illustrating a partial structure of a battery according to an exemplary embodiment;

FIG. 4 is a partially enlarged schematic view of a battery according to an exemplary embodiment;

fig. 5 is a schematic diagram illustrating the structure of an insulating film of a battery according to an exemplary embodiment.

The reference numerals are explained below:

1. a gap; 10. a battery case; 11. a first housing member; 12. a second housing member; 13. a liquid injection hole; 14. recessing; 20. an electric core; 21. a cell main body; 211. a first surface; 212. a second surface; 22. a lug portion; 30. an insulating film; 31. a main body portion; 32. an extension portion; 40. an electrode lead-out structure; 41. an insulating member; 42. a patch panel; 43. a pole assembly; 50. and sealing the insulating film.

Detailed Description

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

In the description of the present disclosure, unless explicitly specified or limited otherwise, the terms "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, references to "the" object or "an" object are also intended to mean one of possibly multiple such objects.

The terms "connected," "secured," and the like are to be construed broadly and unless otherwise stated or indicated, and for example, "connected" may be a fixed connection, a removable connection, an integral connection, an electrical connection, or a signal connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present disclosure can be understood as a specific case by a person skilled in the art.

Further, in the description of the present disclosure, it should be understood that the directional words "upper", "lower", "inner", "outer", etc., which are described in the exemplary embodiments of the present disclosure, are described at the angles shown in the drawings, and should not be construed as limiting the exemplary embodiments of the present disclosure. It will also be understood that, in the context of a connection between one element or feature and another element(s), "on," "under," or "inside" or "outside," it can be directly connected to the other element(s) "on," "under" or "inside" or "outside," or indirectly connected to the other element(s) "on," "under" or "inside" or "outside" through intervening elements.

An embodiment of the present invention provides a battery, please refer to fig. 1 to 5, the battery includes: a battery case 10; the battery comprises a battery cell 20, the battery cell 20 is arranged in the battery shell 10, the battery cell 20 comprises a battery cell main body 21 and a tab portion 22, and the tab portion 22 extends out from the side surface of the battery cell main body 21 along a first direction; and an insulating film 30, the insulating film 30 covering the cell main body 21, and one end of the insulating film 30 being disposed beyond the cell main body 21 in the first direction for insulation of the lug part 22 and the battery case 10.

The utility model discloses the battery of an embodiment includes battery case 10, electric core 20 and insulating film 30, and insulating film 30 realizes insulating battery case 10 and electric core 20. By covering the cell main body 21 with the insulating film 30 and disposing one end of the insulating film 30 beyond the cell main body 21 along the first direction, a part of the insulating film 30 can be disposed between the tab portion 22 and the battery case 10, so that the insulating arrangement between the tab portion 22 and the battery case 10 can be effectively ensured, and the safety performance of the battery can be improved.

It should be noted that the tab portion 22 is used to connect with an electrode lead-out structure, and most of the tab portion 22 is exposed, and if no other insulating structure is provided between the tab portion 22 and the battery case 10, the risk of electrical connection between the tab portion 22 and the battery case 10 is likely to occur. In the present embodiment, by disposing one end of the insulating film 30 beyond the cell main body 21 along the first direction, that is, by disposing a part of the insulating film 30 between the tab portion 22 and the battery case 10, and necessarily having the insulating film 30 at the position where the tab portion 22 is connected to the cell main body 21, the distance between the position where the tab portion 22 is connected to the cell main body 21 and the battery case 10 can be the closest, so that the insulating film 30 can effectively ensure the insulating disposition between the tab portion 22 and the battery case 10.

The battery cell 20 includes a battery cell main body 21 and two electrode ear portions 22, the two electrode ear portions 22 may be located on two opposite sides of the battery cell main body 21, one electrode ear portion 22 extends from one side surface of the battery cell main body 21 along a first direction, the other electrode ear portion 22 extends from the other side surface of the battery cell main body 21 along a second direction, the first direction and the second direction are opposite, at this time, one end of the insulating film 30 exceeds the setting of the battery cell main body 21 along the first direction, the other end of the insulating film 30 exceeds the setting of the battery cell main body 21 along the second direction, so that the insulating film 30 can be simultaneously disposed in an insulating manner between the two electrode ear portions 22 and the battery case 10.

In one embodiment, the tab portion 22 includes more than two single tabs extending from the side surface of the cell main body 21 along the first direction, and the length of the single tabs is not less than the length of the insulating film 30 exceeding the cell main body 21, so that the tab portion 22 formed by gathering a plurality of single tabs has a certain length, thereby ensuring that the tab portion 22 can be reliably connected to the electrode lead-out structure.

The length of monolithic utmost point ear is not less than the length that insulating film 30 surpassed electric core main part 21, outside guaranteeing that insulating film 30 can reliably realize the insulation protection between utmost point ear 22 and battery case 10, can avoid insulating film 30 overlength, not only cost increase, and be unfavorable for the setting of insulating film 30, after all insulating film 30 is longer not only the installation difficulty, and hardly guarantee that insulating film 30 can set up flatly between utmost point ear 22 and battery case 10.

It should be noted that the battery cell main body 21 includes more than two pole pieces, the tab portion 22 includes more than two single tabs, the single tabs respectively extend from the pole pieces corresponding to the single tabs, the width of the single tabs may be smaller than the width of the pole pieces, and a plurality of single tabs are stacked to form the tab portion 22 and connected to the electrode lead-out structure. Wherein the single tab is made of a metal foil having good electrical and thermal conductivity, such as aluminum, copper, nickel, or the like.

In one embodiment, the length of the insulating film 30 exceeding the cell main body 21 is 0.1mm to 5mm, which not only effectively realizes the insulating arrangement between the tab portion 22 and the battery case 10, but also facilitates the arrangement of the insulating film 30 without too much length of the insulating film 30 exceeding the cell main body 21.

In one embodiment, the length of the insulating film 30 beyond the cell body 21 may be 0.1mm, 0.15mm, 0.2mm, 0.3mm, 0.5mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 4.8mm, 4.9mm, 5mm, or the like. When the length of the insulating film 30 exceeding the electric core main body 21 is smaller than 1mm, it is not favorable for realizing the insulating setting between the antipodal ear portion 22 and the battery shell 10, and after the length of the insulating film 30 exceeding the electric core main body 21 is larger than 5mm, not only the cost is increased, but also the assembling of the insulating film 30 is not favorable, in this embodiment, the above problem can be effectively avoided by controlling the length of the insulating film 30 exceeding the electric core main body 21 between 1mm and 5mm.

In one embodiment, as shown in fig. 2, the cell main body 21 includes two oppositely disposed first surfaces 211 and four second surfaces 212 disposed around the first surfaces 211, and an area of the first surfaces 211 is larger than an area of the second surfaces 212; wherein, insulating film 30 covers at least one first surface 211, and one end of insulating film 30 is set to exceed first surface 211, thereby can make insulating film 30 effectively realize the insulation protection between utmost point ear portion 22 and battery case 10, avoid appearing the electric connection between utmost point ear portion 22 and battery case 10.

It should be noted that the two opposing first surfaces 211 are large surfaces of the cell main body 21, the four second surfaces 212 are small surfaces of the cell main body 21, and the four second surfaces 212 include two pairs of small surfaces, that is, a first pair of small surfaces extending along the length direction of the cell main body 21 and a second pair of small surfaces extending along the width direction of the cell main body 21, and the area of the first pair of small surfaces is larger than that of the second pair of small surfaces, but smaller than that of the large surfaces. Two pole ear portions 22 may extend from the second pair of minor surfaces, respectively.

Accordingly, the battery case 10 may include two large surfaces and four small surfaces, and the two large surfaces of the battery case 10 and the two large surfaces of the cell main body 21 are disposed opposite to each other, and the four small surfaces of the battery case 10 and the four small surfaces of the cell main body 21 are disposed opposite to each other.

When the individual tabs of the tab part 22 are leveled in parallel with the first surfaces 211, the insulating film 30 covers at least one of the first surfaces 211, and one end of the insulating film 30 is disposed beyond the first surface 211, so that the insulating film 30 can effectively achieve insulation protection between the tab part 22 and the battery case 10.

The insulating film 30 can cover the two first surfaces 211 and the two second surfaces 212, so that the insulating arrangement between the cell main body 21 and the battery case 10 can be effectively achieved.

In one embodiment, as shown in fig. 3 and 4, the battery further includes: the electrode extraction structure 40 is arranged on the battery shell 10, at least part of the electrode extraction structure 40 is located in the battery shell 10, the electrode extraction structure 40 is connected with the tab part 22, a gap 1 is formed between the electrode extraction structure 40 and the side surface of the battery cell main body 21, where the tab part 22 is extracted, and the orthographic projections of the insulating film 30 and the gap 1 on the surface of the battery shell 10 where the electrode extraction structure 40 is arranged are a first orthographic projection and a second orthographic projection respectively, and at least parts of the first orthographic projection and the second orthographic projection are overlapped, so that the insulating film 30 can cover a part of the gap 1, and thus a part of the insulating film 30 can be ensured to be arranged between the tab part 22 and the battery shell 10, and the insulating arrangement of the tab part 22 and the battery shell 10 by the insulating film 30 is achieved.

It should be noted that the battery may include two electrode lead-out structures 40, and the two electrode lead-out structures 40 may be electrically connected to the two electrode ear portions 22, respectively, so that the two electrode lead-out structures 40 respectively serve as a positive electrode lead-out end and a negative electrode lead-out end of the battery. And there is clearance 1 between the side of pole ear portion 22 is drawn out to electrode extraction structure 40 and electric core main part 21, and there is the gap between utmost point ear portion 22 and the battery case 10 promptly, in this embodiment, through surpassing electric core main part 21 setting with the one end of insulating film 30 along the first direction to can make insulating film 30 can cover clearance 1, thereby can guarantee the reliable insulation between utmost point ear portion 22 and the battery case 10.

In one embodiment, as shown in fig. 4, the electrode lead-out structure 40 includes: an insulator 41, the insulator 41 being provided to the battery case 10; the adapter sheet 42, at least part of the adapter sheet 42 is arranged on one side of the insulating member 41 far away from the battery shell 10, and the adapter sheet 42 is connected with the tab part 22; the gap 1 is formed between the insulating member 41 and the side surface of the cell main body 21 close to the insulating member 41, the insulating film 30 extends out of the cell main body 21 and at least partially covers the surface of the battery case 10 on which the insulating member 41 is arranged, so that the insulating film 30 can be arranged between the pole lug part 22 and the battery case 10, and the insulating film 30 and the insulating member 41 can jointly realize the insulation between the pole lug part 22 and the battery case 10, so that the safety performance of the battery is ensured.

The insulating member 41 may be a plastic member, the insulating member 41 may be a rubber member, and the like, but not limited thereto, and the insulating member 41 may achieve both insulation and reliable support of the contact piece 42. The adaptor plate 42 and the tab portion 22 may be joined by welding.

In one embodiment, the length of the insulating film 30 beyond the cell main body 21 is not less than the length of the gap 1 in the first direction, that is, in the first direction, at least one end of the insulating film 30 away from the cell main body 21 and one end of the insulating member 41 close to the cell main body 21 may be in the same surface, so as to ensure that the insulating film 30 and the insulating member 41 can jointly achieve insulation between the counter electrode lug part 22 and the battery case 10, and thus ensure the safety performance of the battery.

The length of the insulating film 30 beyond the cell main body 21 may be equal to the length of the gap 1 in the first direction, that is, the end of the insulating film 30 away from the cell main body 21 may be in the same plane as the end of the insulating member 41 close to the cell main body 21 in the first direction. Alternatively, the length of the insulating film 30 beyond the cell body 21 may be greater than the length of the gap 1 in the first direction, that is, in the first direction, one end of the insulating film 30 away from the cell body 21 may be located directly below the insulating member 41.

In one embodiment, as shown in fig. 1, 2 and 4, the electrode lead-out structure 40 further includes: the pole assembly 43, the pole assembly 43 is connected with the adapter sheet 42, and a part of the pole assembly 43 is positioned outside the battery shell 10; the electrode leading-out structure 40 is disposed on the large surface of the battery case 10, so that the large surface of the battery case 10 can provide sufficient supporting force for the electrode leading-out structure 40, thereby ensuring the stability of the electrode leading-out structure 40. The pole assembly 43 is connected with the adaptor plate 42, and the adaptor plate 42 is connected with the tab part 22, so that the pole assembly 43 can be used as an electrode leading-out end of the battery. The pole assembly 43 and the adapter plate 42 may be welded, or the pole assembly 43 and the adapter plate 42 may be riveted.

In some embodiments, there are two pole assemblies 43, two pole assemblies 43 are a positive pole assembly and a negative pole assembly, respectively, each pole assembly 43 may include two poles for increasing the overcurrent capacity of the battery, there are two pole lugs 22, two pole lugs 22 are a positive pole lug and a negative pole lug, respectively, the positive pole assembly is connected with the positive pole lug, and the negative pole assembly is connected with the negative pole lug.

It should be noted that the pole assembly 43 and the battery case 10 may be insulated from each other, for example, an insulating member may be used for insulation between the two, or an insulating coating may be used for insulation between the two, which is not limited herein and may be selected according to actual requirements.

In one embodiment, as shown in fig. 1, the battery case 10 is provided with a liquid injection hole 13, and the liquid injection hole 13 is spaced from the pole assembly 43, so as to improve the space utilization rate of the battery case 10.

The liquid injection hole 13 is used for injecting liquid into the battery case 10, and the liquid injection hole can be sealed by a sealing structure after the liquid injection is completed. The pour hole 13 may be at least two, and the at least two pour holes 13 may be centrosymmetric with respect to the intersection of the first diagonal direction and the second diagonal direction of the battery case 10.

In one embodiment, the battery housing 10 is provided with a recess 14, and the pole assembly 43 is located in the recess 14, so that the pole assembly 43 can be prevented from occupying the stack space of the battery pack, thereby improving the energy density of the battery pack.

In one embodiment, as shown in fig. 1, a recess 14 is disposed on the battery housing 10, the post assembly 43 and the recess 14 are respectively located on two opposite surfaces of the battery housing 10, and the recess 14 is used for receiving the post assembly of another battery, so that when the batteries are grouped, the post assembly of another battery can be received in the recess 14, the post assembly is prevented from occupying a space between two batteries, a distance between two adjacent batteries is reduced, and thus energy density of the battery group is improved.

In one embodiment, as shown in fig. 1 and 2, the pole assembly 43 may be two, the recess 14 may be two, two pole assemblies 43 may be disposed on the same large surface of the battery housing 10, and two recesses 14 may be disposed on the other large surface of the battery housing 10.

In one embodiment, as shown in fig. 4 and 5, the insulating film 30 includes a main body portion 31 and an extension portion 32, the main body portion 31 covers at least a portion of the cell main body 21, and the extension portion 32 extends from an end of the main body portion 31 along a first direction to be disposed beyond the cell main body 21, so that the extension portion 32 can be used to achieve insulation protection between the pair of pole ear portions 22 and the battery case 10, thereby improving the safety performance of the battery.

In one embodiment, the extension portion 32 extends from a part of the end of the main body portion 31, so that the width of the extension portion 32 is smaller than that of the main body portion 31, that is, a gap is formed between two ends of the extension portion 32 along the circumferential direction of the main body portion 31, which can reduce the size of the extension portion 32, but does not affect the extension portion 32 to achieve insulation protection between the tab portion 22 and the battery case 10.

As shown in fig. 5, the main body 31 has two opposite ends along the length direction of the main body 31, and the extension portion 32 extends from a part of the end of the main body 31, that is, the extension portion 32 occupies only a part of the end of the main body 31, so that after the main body 31 is flattened, the width of the extension portion 32 can be smaller than the width of the main body 31.

As shown in fig. 4 and 5, the extension 32 is formed in a substantially U-shaped configuration, and the extension 32 and the insulating member 41 reliably provide insulation protection between the tab portion 22 and the battery case 10.

The width of the main body 31 refers to the size of the end of the main body 31, and correspondingly, the width of the extension 32 refers to the length of the extension 32 connected with the end of the main body 31.

In some embodiments, it is not excluded that the extension 32 extends from all of the end of the main body 31, such that the width of the extension 32 is equal to the width of the main body 31.

In one embodiment, as shown in fig. 3 to 5, the main body 31 covers a portion of the cell main body 21, the battery further includes a seal insulation film 50, the seal insulation film 50 is disposed separately from the insulation film 30, the seal insulation film 50 is partially adhered to a surface of the main body 31 away from the cell main body 21, and is partially adhered to a surface of the cell main body 21 that is not covered by the main body 31, that is, a portion of the seal insulation film 50 is adhered to the main body 31, and a portion of the seal insulation film 50 is adhered to the cell main body 21, so that the main body 31 can be firmly fixed to the cell main body 21, and the relative displacement between the main body 31 and the cell main body 21 can be prevented, thereby preventing the cell main body 21 from directly contacting the battery case 10 after being exposed.

The insulating film 30 may be a mylar film, the sealing insulating film 50 may be an adhesive tape, or the sealing insulating film 50 may be a mylar film, or the like, which is not limited herein.

In one embodiment, as shown in fig. 1 to 3, the battery case 10 includes: a first housing part 11; a second housing part 12, the second housing part 12 being connected to the first housing part 11 to enclose the cells 20; the first casing piece 11 is a flat plate, and at least a part of the insulating film 30 extending beyond the cell main body 21 is located between the pole ear portion 22 and the first casing piece 11, so that the insulating film 30 can insulate and protect the pole ear portion 22 and the first casing piece 11.

In one embodiment, the electrode leading-out structure 40 may be disposed on the first housing member 11, and the first housing member 11 is a flat plate, which not only has a simple structure, but also facilitates the disposition of the electrode leading-out structure 40, thereby improving the molding efficiency of the battery.

In one embodiment, the battery case 10 may be made of stainless steel or aluminum, and has good corrosion resistance and sufficient strength. The battery case 10 is substantially rectangular.

It should be noted that the first housing member 11 and the second housing member 12 may be provided independently, as shown in fig. 2. In some embodiments, it is not excluded that the first housing part 11 and the second housing part 12 may be a unitary structure, with the space for accommodating the cell 20 being formed by stamping and subsequently being connected in a closed manner by welding.

In one embodiment, the length of the cell is a,400mm a 2500mm, the width of the cell is b, the height of the cell is c,2b a 50b, and/or 0.5c b 20c.

Further, b is more than or equal to 50mm and less than or equal to 200mm, and c is more than or equal to 10mm and less than or equal to 100mm.

Preferably, 4 b.ltoreq.a.ltoreq.25 b, and/or 2 c.ltoreq.b.ltoreq.10 c.

In the battery in the above embodiment, the ratio of the length to the width of the battery is large, and further, the ratio of the width to the height of the battery is large, while sufficient energy density is ensured.

In one embodiment, the length of the battery is a, the width of the battery is b, and a is more than or equal to 4b and less than or equal to 7b, i.e. the ratio of the length to the width of the battery in the embodiment is larger, so that the energy density of the battery is increased, and the subsequent formation of the battery pack is facilitated.

In one embodiment, the height of the battery is c, b is more than or equal to 3c and less than or equal to 7c, and the ratio of the width to the height of the battery is larger, so that the battery is conveniently formed under the condition of ensuring enough energy density.

Alternatively, the length of the cell may be 500mm to 1500mm, the width of the cell may be 80mm to 150mm, and the height of the cell may be 15mm to 35mm.

The length of the battery is a dimension in the battery length direction, the width of the battery is a dimension in the battery width direction, and the height of the battery is a dimension in the battery height direction, that is, the thickness of the battery.

In one embodiment, the batteries are laminated batteries, so that the batteries are convenient to pack and can be processed to obtain batteries with longer lengths.

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

Specifically, the battery cell 20 is a laminated battery cell, and the battery cell 20 has a first pole piece, a second pole piece opposite to the first pole piece in electrical property, and a diaphragm disposed between the first pole piece and the second pole piece, so that a plurality of pairs of the first pole piece and the second pole piece are stacked to form the laminated battery cell.

Optionally, the battery may be a winding battery, that is, a first pole piece, a second pole piece opposite to the first pole piece in electrical property, and a diaphragm piece disposed between the first pole piece and the second pole piece are wound to obtain a winding battery cell.

An embodiment of the utility model also provides a group battery, and the group battery includes above-mentioned battery.

The utility model discloses the battery of group battery of an embodiment includes battery casing 10, electric core 20 and insulating film 30, and insulating film 30 realizes insulating battery casing 10 and electric core 20. By covering the cell main body 21 with the insulating film 30 and disposing one end of the insulating film 30 beyond the cell main body 21 in the first direction, a part of the insulating film 30 can be disposed between the tab portion 22 and the battery case 10, so that the insulating arrangement formed between the tab portion 22 and the battery case 10 can be effectively ensured, and the safety performance of the battery pack can be improved.

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

The battery module includes a plurality of batteries, and the battery module may further include an end plate and a side plate for fixing the plurality of batteries.

It should be noted that a plurality of batteries can be arranged in the battery box after forming the battery module, and the plurality of batteries can be fixed through the end plate and the side plate. A plurality of batteries can directly set up in the battery box, need not to pack a plurality of batteries promptly, and at this moment, can get rid of end plate and curb plate.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice in the art to which the disclosure pertains. It is intended that the specification and example embodiments be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

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

Claims (10)

1. A battery, comprising:

a battery case (10);

the battery cell (20) is arranged in the battery shell (10), the battery cell (20) comprises a cell main body (21) and a tab part (22), and the tab part (22) extends out from the side surface of the cell main body (21) along a first direction;

an insulating film (30), the insulating film (30) covering the cell main body (21), and one end of the insulating film (30) being disposed beyond the cell main body (21) in the first direction for insulation of the tab portion (22) and the battery case (10).

2. The battery according to claim 1, wherein the tab portion (22) includes two or more single tabs extending from a side surface of the cell main body (21) in the first direction, and a length of the single tabs is not less than a length of the insulating film (30) beyond the cell main body (21).

3. The battery according to claim 1, wherein the length of the insulating film (30) beyond the cell body (21) is 0.1mm to 5mm.

4. The battery of claim 1, wherein the cell body (21) comprises two first surfaces (211) arranged oppositely and four second surfaces (212) arranged around the first surfaces (211), and the area of the first surfaces (211) is larger than that of the second surfaces (212);

wherein the insulating film (30) covers at least one of the first surfaces (211), one end of the insulating film (30) being disposed beyond the first surface (211).

5. The battery of any one of claims 1 to 4, further comprising:

electrode leading-out structure (40), electrode leading-out structure (40) set up in battery case (10), at least part of electrode leading-out structure (40) is located in battery case (10), electrode leading-out structure (40) with utmost point ear (22) are connected, electrode leading-out structure (40) with electric core main part (21) are drawn forth clearance (1) have between the side of utmost point ear (22), insulating film (30) with clearance (1) are in battery case (10) is provided with the orthographic projection on the surface of electrode leading-out structure (40) is first orthographic projection and second orthographic projection respectively, first orthographic projection with at least part of second orthographic projection coincides mutually.

6. The battery according to claim 5, wherein the electrode lead-out structure (40) comprises:

an insulator (41), the insulator (41) being provided to the battery case (10);

the adapter sheet (42), at least part of the adapter sheet (42) is arranged on one side of the insulating piece (41) far away from the battery shell (10), and the adapter sheet (42) is connected with the pole lug part (22);

wherein the gap (1) is formed between the insulating piece (41) and the side surface of the cell main body (21) close to the insulating piece (41), and the insulating film (30) at least partially covers the surface of the battery shell (10) provided with the insulating piece (41) and exceeds the cell main body (21).

7. The battery according to claim 6, wherein a length of the insulating film (30) beyond the cell main body (21) is not less than a length of the gap (1) in the first direction.

8. The battery according to any one of claims 1 to 4, wherein the insulating film (30) includes a main body portion (31) and an extension portion (32), the main body portion (31) covers at least a portion of the cell main body (21), and the extension portion (32) extends from an end of the main body portion (31) in the first direction so as to be disposed beyond the cell main body (21);

wherein, the extension part (32) extends from a part of the end part of the main body part (31), so that the width of the extension part (32) is smaller than that of the main body part (31).

9. The battery according to claim 8, wherein the trunk portion (31) covers a portion of the cell main body (21), the battery further comprises a seal insulating film (50), the seal insulating film (50) is provided separately from the insulating film (30), and the seal insulating film (50) is partially adhered to a surface of the trunk portion (31) away from the cell main body (21) and partially adhered to a surface of the cell main body (21) which is not covered by the trunk portion (31).

10. The battery according to any one of claims 1 to 4, wherein the battery case (10) comprises:

a first housing part (11);

a second housing part (12), wherein the second housing part (12) is connected to the first housing part (11) in order to enclose the electrical core (20);

wherein the first housing piece (11) is a flat plate, and at least a part of the insulating film (30) extending beyond the cell main body (21) is located between the lug part (22) and the first housing piece (11).

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