CN217589361U - Battery with a battery cell - Google Patents
Battery with a battery cell Download PDFInfo
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- CN217589361U CN217589361U CN202221657084.2U CN202221657084U CN217589361U CN 217589361 U CN217589361 U CN 217589361U CN 202221657084 U CN202221657084 U CN 202221657084U CN 217589361 U CN217589361 U CN 217589361U
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- battery
- insulating film
- main body
- cell main
- utmost point
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The utility model relates to a battery technology field provides a battery, include: a battery case; the battery comprises a battery cell and a battery core, wherein the battery cell is arranged in a battery shell and comprises a battery cell main body and lug parts, the lug parts extend out from the side surface of the battery cell main body and comprise more than two single-sheet lugs extending out from the side surface of the battery cell main body, a plurality of single-sheet lugs are folded to form the lug parts, and a first bending area is formed at one side of the lug parts, which is far away from the battery cell main body; the insulating film, the insulating film covers utmost point ear's portion and sets up, and covers first bending region, along electric core main part and utmost point ear's extending direction vertically direction on, the width of insulating film is greater than utmost point ear's width to avoid along utmost point ear's width direction, utmost point ear's both ends surpass the both ends of insulating film, thereby realize the reliable cover of insulating film to utmost point ear's portion, thereby guarantee to form insulating setting between utmost point ear and the battery case, with this security performance who improves the battery.
Description
Technical Field
The utility model relates to a battery technology field especially relates to a battery.
Background
In the related art, the battery core of the battery is arranged in the battery shell, and due to the structural limitation of the pole ear part of the battery core, the pole ear part and the battery shell are easy to have insulation failure risks.
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 shell, a battery core and a plurality of single-sheet tabs, wherein the battery core is arranged in the battery shell and comprises a battery core main body and tab parts, the tab parts extend out from the side surfaces of the battery core main body and comprise more than two single-sheet tabs extending out from the side surfaces of the battery core main body, the single-sheet tabs are folded to form the tab parts, and a first bending area is formed on one side, away from the battery core main body, of the tab parts;
the insulating film, the setting of insulating film cover utmost point ear portion, and cover first bending region, along electric core main part and utmost point ear's extending direction vertical direction, the width of insulating film is greater than the width of utmost point ear portion.
The utility model discloses battery includes battery case, electric core and insulating film, and the insulating film covers utmost point ear's setting to can realize the insulation of antipodal ear's and battery case. Through making the insulating film cover utmost point ear portion set up to in the extending direction vertically direction of electric core main part and utmost point ear portion, the width of insulating film is greater than utmost point ear portion's width, can guarantee that utmost point ear portion's both ends do not surpass the both ends of insulating film to this realizes the reliable cover of insulating film to utmost point ear portion, thereby guarantees to form insulating setting between utmost point ear portion 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 partial structural view of an insulating film and a cell of a battery according to a first exemplary embodiment;
fig. 6 is a partial structural view of an insulating film and a cell of a battery according to a second exemplary embodiment;
fig. 7 is a partial structural diagram of an insulating film and a cell of a battery according to a third exemplary embodiment.
The reference numerals are explained below:
10. a battery case; 11. a first housing member; 12. a second housing member; 13. sinking; 20. an electric core; 21. a cell main body; 211. a first surface; 212. a second surface; 22. a pole ear portion; 221. a first bending region; 222. a second bending region; 30. an insulating film; 31. an upper end; 32. a lower end; 40. a patch; 50. and (4) a pole component.
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 otherwise explicitly specified or limited, the terms "first", "second", and "first" 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, reference to "the" object or "an" object is also intended to mean one of many such objects possible.
The terms "connected," "secured," and the like are to be construed broadly and encompass, for example, a fixed connection, a removable connection, an integral connection, an electrical connection, or a signal connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present disclosure can be understood by those skilled in the art as the case may be.
Further, in the description of the present disclosure, it 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 7, 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 cell main body 21 and a tab part 22, the tab part 22 extends out from the side surface of the cell main body 21, the tab part 22 comprises more than two single tabs extending out from the side surface of the cell main body 21, the tab part 22 is formed after the multiple single tabs are folded, and a first bending region 221 is formed on one side of the tab part 22 away from the cell main body 21; the insulating film 30, the insulating film 30 covers the tab portion 22, and covers the first bending region 221, and along the direction perpendicular to the extending direction of the cell main body 21 and the tab portion 22, the width of the insulating film 30 is greater than the width of the tab portion 22, so as to avoid that the two ends of the tab portion 22 exceed the two ends of the insulating film 30 along the width direction of the tab portion 22.
The utility model discloses the battery of an embodiment includes battery case 10, electric core 20 and insulating film 30, and insulating film 30 covers utmost point ear of the body 22 setting to can realize utmost point ear of the body 22 and battery case 10's insulation. Through making insulating film 30 cover utmost point ear of body 22 setting, further insulating film 30 covers first bending region 221 to along the width direction of electricity core main part 21, the width of insulating film 30 is greater than the width of utmost point ear of body 22, can guarantee that the both ends of utmost point ear of body 22 do not surpass the both ends of insulating film 30 to this realizes insulating film 30 to the reliable cover of utmost point ear of body 22, thereby guarantees to form insulating setting between utmost point ear of body 22 and battery case 10, with this security performance that improves the battery.
It should be noted that the tab portion 22 can be used to connect with the terminal assembly, 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 easily occurs. In this embodiment, the insulating film 30 is provided to cover the lug part 22, and the two ends of the lug part 22 are not beyond the two ends of the insulating film 30, so that the insulating film 30 can effectively ensure the insulating arrangement between the lug part 22 and the battery case 10.
The battery cell 20 includes a battery cell main body 21 and two tab portions 22, the two tab portions 22 may be located on two opposite sides of the battery cell main body 21, one tab portion 22 extends from one side surface of the battery cell main body 21 along a first direction, the other tab 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, the number of the insulating films 30 may be two, and the two insulating films 30 cover the two tab portions 22, respectively, as shown in fig. 3.
The tab portion 22 includes more than two single tabs extending from the side surface of the cell main body 21, and a tab portion 22 is formed after the multiple single tabs are folded, so that a first bending region 221 is formed on one side of the tab portion 22 away from the cell main body 21; wherein, insulating film 30 covers first bending region 221 to guarantee insulating the setting between utmost point ear portion 22 and battery case 10, and insulating film 30 can be used for the frock to buckle a plurality of monolithic utmost point ears, appear warpage and fall the bits when so preventing a plurality of monolithic utmost point ears from drawing in, thereby improve the assembly efficiency and the yield of battery, reduce the inside safe risk of battery.
The top of a plurality of monolithic utmost point ears can be stamped insulating film 30, when a plurality of monolithic utmost point ears were taken up and were buckled, the frock can be buckled insulating film 30 and drive a plurality of monolithic utmost point ears and buckle, is convenient for retrain a plurality of monolithic utmost point ears, appears the warpage when preventing a plurality of monolithic utmost point ears from taking up and fall the bits to improve the assembly efficiency and the yield of battery, reduce the inside safe risk of battery. The first bending region 221 shown in fig. 4 and 5 may be formed after the bundling and bending of the plurality of single tabs.
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-piece tabs, the single-piece tabs respectively extend from the pole pieces corresponding to the single-piece tabs, the width of the single-piece tabs may be smaller than the width of the pole pieces, and a plurality of single-piece tabs are stacked to form the tab portion 22. Wherein the single tab is made of a metal foil having good electrical and thermal conductivity, such as aluminum, copper, nickel, or the like.
The width direction of the cell main body 21 may be regarded as the width direction of a single pole piece, and the direction perpendicular to the extending direction of the tab part 22 of the cell main body 21 is the width direction of a single pole piece. The width direction of the cell main body 21 is parallel to the width direction of the tab portion 22, and the direction perpendicular to the extending direction of the cell main body 21 and the tab portion 22 is the width direction of the tab portion 22.
In one embodiment, the insulating film 30 may be a PET tape or a PI tape, etc., for example, the insulating film 30 may be a blue PET tape.
In one embodiment, the length of the insulating film 30 beyond the tab portion 22 is 1mm to 10mm in the width direction of the cell main body 21, i.e., in the direction perpendicular to the extending direction of the cell main body 21 and the tab portion 22, which not only can ensure the reliable covering of the tab portion 22 by the insulating film 30, but also can avoid the problem of inconvenient installation and the like caused by the overlong insulating film 30.
The length of the insulating film 30 beyond the tab portion 22 in the width direction of the cell main body 21 may be 1mm, 1.1mm, 1.2mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 4.8mm, 4.9mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm, 9.8mm, 9.9mm, 10mm, or the like.
Note that both ends of the insulating film 30 may be disposed beyond the lug portions 22 in the width direction of the cell main body 21. Alternatively, one end of the insulating film 30 may be disposed beyond the tab portion 22 in the width direction of the cell main body 21, and the other end may be flush with the tab portion 22.
In one embodiment, as shown in fig. 4 and 5, the tab portion 22 is formed with a second bending region 222, and the second bending region 222 is located on one side of the first bending region 221 close to the cell main body 21; the first bending region 221 and the second bending region 222 are disposed at an interval. The second bending region 222 is formed to ensure that a plurality of single tabs can be reliably folded, and the first bending region 221 is formed to reduce the length of the tab portion 22 along the length direction of the cell main body 21, so as to reduce the space in the length direction occupied by the tab portion 22, thereby not only saving the internal space of the battery case 10, but also avoiding the end portion of the tab portion 22 forming an electrical connection with the battery case 10.
In one embodiment, as shown in fig. 4 and 5, the insulating film 30 also covers the second bending region 222, so that the insulating film 30 ensures that the second bending region 222 does not form an electrical connection with the battery case 10.
The second bending region 222 is connected to the cell main body 21, that is, the second bending region 222 is close to the cell main body 21, and the insulating film 30 also covers the second bending region 222, so that the end of the lug part 22 connected to the cell main body 21 can be prevented from being electrically connected to the battery case 10.
Considering that the first bending region 221 may be located at the farthest end in the cell length direction, and thus the possibility that the first bending region 221 contacts the battery case 10 may increase, the insulating film 30 may also cover the first bending region 221, so that the insulating film 30 ensures reliable insulation between the first bending region 221 and the battery case 10.
In one embodiment, the end of the insulating film 30 away from the cell main body 21 extends to between the first bending region 221 and the end of the tab 22 away from the cell main body 21, which not only ensures that the insulating film 30 can reliably cover the first bending region 221, but also avoids the problem that the insulating film 30 is too long to be conveniently installed and the cost is increased.
In one embodiment, as shown in fig. 5, the end of the insulating film 30 away from the cell main body 21 does not exceed the end of the tab portion 22 away from the cell main body 21, i.e., the length of the insulating film 30 covering the tab portion 22 may be less than the length of the tab portion 22, so as to facilitate the arrangement of the insulating film 30 and ensure reliable insulation between the tab portion 22 and the battery case 10 by the insulating film 30.
In one embodiment, as shown in fig. 6, the end of the insulating film 30 away from the cell main body 21 exceeds the end of the tab portion 22 away from the cell main body 21, that is, the length of the insulating film 30 covering the tab portion 22 may be greater than the length of the tab portion 22, so that the insulating film 30 can effectively cover the tab portion 22, thereby ensuring reliable insulation between the tab portion 22 and the battery case 10 by the insulating film 30.
In one embodiment, the insulation films 30 are located on the upper and lower sides of the tab portion 22, and the projections of the insulation films 30 on the upper and lower sides of the tab portion 22 and the first bending region 221 at least partially overlap, the insulation films 30 on the upper and lower sides of the tab portion 22 are connected to wrap the tab portion 22, that is, the insulation films 30 exceeding the tab portion 22 are connected up and down along the width direction of the tab portion 22, so that the tab portion 22 is located inside the insulation films 30, the insulation films 30 seal the tab portion 22, the tab portion 22 is prevented from generating more metal debris due to bending, the tab portion 22 affects the safety risk inside the battery, and therefore, the insulation films 30 can effectively ensure the insulation arrangement between the tab portion 22 and the battery case 10.
As shown in connection with fig. 7, insulator film 30 can include an upper end 31 and a lower end 32, with upper end 31 being located on an upper side of ear portion 22 and lower end 32 being located on a lower side of ear portion 22 such that upper end 31 and lower end 32 can be connected to thereby provide encapsulation of ear portion 22. It should be noted that the upper end 31 and the lower end 32 shown in fig. 7 are not arranged in alignment, that is, the width of the tab portion 22 of the insulating film 30 may vary along the width direction of the tab portion 22. In some embodiments, the upper end 31 and the lower end 32 may be aligned, that is, the entire width of the insulation film 30 may be uniform along the width direction of the tab portion 22.
In one embodiment, the surface of the insulating film 30 close to the lug portion 22 is provided with a glue layer, and the insulating films 30 on the upper and lower sides of the lug portion 22 are bonded, so as to ensure that the insulating film 30 can reliably wrap the lug portion 22, thereby ensuring the insulating protection of the lug portion 22 and the battery case 10 by the insulating film 30. The adhesive layer may be a colloid in the related art, such as an adhesive, a structural adhesive, and the like.
One side of the insulating film 30 is provided with a glue layer so that after the insulating film 30 wraps the tab portion 22, the glue layer of the insulating film 30 can form a connection, thereby ensuring wrapping stability of the insulating film 30.
In one embodiment, as shown in fig. 3 and 4, the battery further includes an interposer 40, the interposer 40 is disposed in the battery case 10, and the tab 22 covers a portion of the interposer 40; the tab portion 22 is bent from one end of the interposer 40 to form a first bending region 221, so that the tab portion 22 can be ensured to reliably cover a portion of the interposer 40, and the contact area between the tab portion 22 and the interposer 40 can be increased, thereby improving the current capacity of the tab portion 22 and the interposer 40.
In one embodiment, the insulating film 30 covers the side of the lug portion 22 away from the interposer 40, so as to ensure that the insulating film 30 can cover the lug portion 22, ensure the insulating formation of the lug portion 22, and prevent the lug portion 22 from bending to generate metal dust to affect the overall safety of the battery.
As shown in fig. 4, after the tab portion 22 extends from the side surface of the battery cell main body 21, the tab portion 22 may be bent at one end of the adaptor sheet 40, so that the tab portion 22 covers the adaptor sheet 40, that is, a part of the tab portion 22 is located inside the adaptor sheet 40, at this time, the insulating film 30 may cover at least a part of the tab portion 22 located below the adaptor sheet 40, so that the tab portion 22 may be prevented from being bent to generate metal chips, thereby improving the insulating performance of the insulating film 30.
In one embodiment, as shown in fig. 4, the insulating film 30 is connected to the cell main body 21, which not only can ensure the connection stability of the insulating film 30, but also can enable the insulating film 30 to form an insulating protection for the cell main body 21.
In one embodiment, as shown in fig. 2, the cell body 21 includes two first surfaces 211 disposed opposite to each other 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 the insulating film 30 is connected to the first surface 211, the insulating film 30 covers a large surface of the lug portion 22, so that the insulating film 30 can reliably protect the lug portion 22 and provide reliable insulation protection.
It should be noted that the two opposite 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, 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 areas of the first pair of small surfaces are larger than the areas of the second pair of small surfaces, but smaller than the areas 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 also 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 single tab of the tab portion 22 is flattened and is parallel to the first surface 211, the insulating film 30 covers the tab portion 22, so that the insulating film 30 can effectively achieve insulation protection between the tab portion 22 and the battery case 10.
In one embodiment, as shown in fig. 1 and 2, the battery further includes: the pole component 50, the pole component 50 is connected with the adapter sheet 40, and a part of the pole component 50 is positioned outside the battery shell 10; wherein, the post assembly 50 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 post assembly 50, thereby ensuring the stability of the post assembly 50. The pole assembly 50 is connected to the adaptor sheet 40, and the adaptor sheet 40 is connected to the tab part 22, so that the pole assembly 50 can serve as an electrode leading-out terminal of the battery. The pole assembly 50 and the interposer 40 may be welded, or the pole assembly 50 and the interposer 40 may be riveted.
In some embodiments, there are two pole assemblies 50, two pole assemblies 50 are a positive pole assembly and a negative pole assembly, respectively, each pole assembly 50 may include two poles for increasing the current 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 to the positive pole lug, and the negative pole assembly is connected to the negative pole lug.
It should be noted that the pole assembly 50 and the battery housing 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, which is not limited herein and may be selected according to actual requirements.
In one embodiment, the battery housing 10 is provided with a recess 13, and the pole assembly 50 is located in the recess 13, so that the pole assembly 50 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 13 is provided on the battery housing 10, the post assembly 50 and the recess 13 are respectively located on two opposite surfaces of the battery housing 10, and the recess 13 is used for receiving the post assembly of another battery, so that when the batteries are grouped, the post assembly of another battery is received in the recess 13, the post assembly is prevented from occupying a space between two batteries, and a distance between two adjacent batteries is reduced, thereby increasing energy density of the battery group.
In one embodiment, as shown in fig. 1 and 2, the pole assembly 50 may be two, the recess 13 may be two, the two pole assemblies 50 may be disposed on the same large surface of the battery housing 10, and the two recesses 13 may be disposed on the other large surface of the battery housing 10.
In one embodiment, as shown in fig. 2, 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 housing member 11 is a flat plate.
In one embodiment, the pole assembly 50 may be disposed on the first housing part 11, and the first housing part 11 is a flat plate, which not only has a simple structure, but also facilitates the disposition of the pole assembly 50, 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 battery is a,400mm & lt, a & lt, 2500mm, the width of the battery is b, the height of the battery is c,2b & lt, a & lt, 50b, and/or, 0.5c & lt, b & lt, 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 convenient to form under the condition of ensuring enough energy density.
Alternatively, the length of the cell may be 500mm-1500mm, the width of the cell may be 80mm-150mm, and the height of the cell may be 15mm-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, which are convenient to pack and can be processed to obtain batteries with longer length.
The battery includes a cell and an electrolyte, and a minimum unit capable of performing an electrochemical reaction such as charge/discharge. The battery cell refers to a unit formed by winding or laminating a stacking portion, wherein the stacking portion comprises a first pole piece, a partition and a second pole piece. 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 wound battery, that is, a first pole piece, a second pole piece opposite to the first pole piece in electrical property, and a diaphragm sheet disposed between the first pole piece and the second pole piece are wound to obtain a wound battery core.
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 case 10, electric core 20 and insulating film 30, and insulating film 30 covers utmost point ear's 22 setting to can realize utmost point ear's 22 and battery case 10's insulation. By making the insulating film 30 cover the tab portion 22, and in the width direction of the tab portion 22, the width of the insulating film 30 is greater than the width of the tab portion 22, it can be ensured that the two ends of the tab portion 22 do not exceed the two ends of the insulating film 30, thereby realizing reliable covering of the tab portion 22 by the insulating film 30, and further ensuring that an insulating arrangement is formed between the tab portion 22 and the battery case 10, thereby improving the safety performance of the battery pack.
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 can also include end plate and curb plate, and end plate and curb plate are used for fixing a 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 within the art to which the disclosure pertains. It is intended that the specification and example embodiments be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (11)
1. A battery, comprising:
a battery case (10);
the battery comprises a battery cell (20), wherein 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 part (22), the tab part (22) comprises more than two single tabs extending out from the side surface of the battery cell main body (21), the tab part (22) is formed after the single tabs are folded, and a first bending area (221) is formed on one side, far away from the battery cell main body (21), of the tab part (22);
insulating film (30), insulating film (30) cover utmost point ear portion (22) sets up, and covers first bending region (221), follow electric core main part (21) with in the perpendicular direction of the extending direction of utmost point ear portion (22), the width of insulating film (30) is greater than the width of utmost point ear portion (22).
2. The battery according to claim 1, wherein the tab portion (22) is formed with a second bending region (222), and the second bending region (222) is located on a side of the first bending region (221) close to the cell main body (21);
wherein the first bending region (221) and the second bending region (222) are arranged at intervals.
3. The battery according to claim 2, wherein the insulating film (30) also covers the second bending region (222).
4. The battery according to any one of claims 1 to 3, wherein an end of the insulating film (30) remote from the cell main body (21) does not extend beyond an end of the lug portion (22) remote from the cell main body (21);
or one end of the insulating film (30) far away from the battery cell main body (21) exceeds one end of the pole lug part (22) far away from the battery cell main body (21).
5. The battery according to any one of claims 1 to 3, wherein the insulating films (30) are located on the upper and lower sides of the tab portion (22), and the insulating films (30) on the upper and lower sides of the tab portion (22) are at least partially overlapped with the projection of the first bending region (221), and the insulating films (30) on the upper and lower sides of the tab portion (22) are connected to wrap the tab portion (22).
6. The battery according to claim 5, characterized in that the surface of the insulating film (30) close to the lug part (22) is provided with a glue layer, and the insulating films (30) on the upper and lower sides of the lug part (22) are connected in an adhesive manner.
7. The battery according to any one of claims 1 to 3, further comprising an interposer (40), wherein the interposer (40) is disposed in the battery case (10), and wherein the tab portion (22) covers a portion of the interposer (40);
wherein the pole ear part (22) is bent from one end of the interposer (40) to form the first bending region (221).
8. The battery according to claim 7, characterized in that the insulating film (30) covers the side of the pole lug portion (22) facing away from the interposer (40).
9. The battery according to any one of claims 1 to 3, wherein a length of the insulating film (30) beyond the tab portion (22) in a direction perpendicular to an extending direction of the cell main body (21) and the tab portion (22) is 1mm to 10mm.
10. The battery according to any one of claims 1 to 3, wherein the insulating film (30) is connected to the cell main body (21).
11. The battery of claim 10, wherein the cell body (21) comprises two first surfaces (211) disposed opposite to each other and four second surfaces (212) disposed around the first surfaces (211), and the first surfaces (211) have an area larger than that of the second surfaces (212);
wherein the insulating film (30) is connected to the first surface (211), the insulating film (30) covering a large surface of the lug portion (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221657084.2U CN217589361U (en) | 2022-06-28 | 2022-06-28 | Battery with a battery cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221657084.2U CN217589361U (en) | 2022-06-28 | 2022-06-28 | Battery with a battery cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217589361U true CN217589361U (en) | 2022-10-14 |
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ID=83532485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221657084.2U Active CN217589361U (en) | 2022-06-28 | 2022-06-28 | Battery with a battery cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217589361U (en) |
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2022
- 2022-06-28 CN CN202221657084.2U patent/CN217589361U/en active Active
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