CN217589313U - Battery with a battery cell - Google Patents
Battery with a battery cell Download PDFInfo
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- CN217589313U CN217589313U CN202221657835.0U CN202221657835U CN217589313U CN 217589313 U CN217589313 U CN 217589313U CN 202221657835 U CN202221657835 U CN 202221657835U CN 217589313 U CN217589313 U CN 217589313U
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- insulating film
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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
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Abstract
The utility model relates to a battery technology field provides a battery, include: a battery case; the battery comprises a battery cell, wherein the battery cell is arranged in a battery shell and comprises a battery cell main body and a lug part, and the lug part extends out from the side surface of the battery cell main body; the first insulating film covers the battery cell main body; a second insulating film connected to the first insulating film and provided to cover the tab portion; wherein the width of the second insulating film is larger than the width of the first insulating film in the width direction of the tab portion. Because the width of the second insulating film is greater than that of the first insulating film along the width direction of the pole ear part, and the second insulating film is connected to the first insulating film, the first insulating film can reliably cover the battery cell main body, so that the first insulating film and the second insulating film can reliably insulate the battery cell and the battery shell, and the safety performance of the battery is improved.
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 battery core and the lug part, the risk of insulation failure easily occurs between the battery core and the battery shell.
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 of the side surface of the battery cell main body;
the first insulating film covers the battery cell main body;
a second insulating film connected to the first insulating film and provided to cover the tab portion;
wherein the second insulating film has a width larger than that of the first insulating film in a width direction of the pole ear portion.
The utility model discloses battery includes battery case, electric core, first insulating film and second insulating film, and first insulating film covers electric core main part setting, and the second insulating film is connected in first insulating film, and covers utmost point ear setting to can be so that first insulating film and second insulating film realize the insulation to electric core and battery case. Because along the width direction of pole ear portion, the width of second insulating film is greater than the width of first insulating film to the second insulating film is connected in first insulating film, thereby can make first insulating film reliably cover electric core main part, with this guarantee that first insulating film and second insulating film realize reliably insulating electric core and battery case, with this security performance that 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 the internal structure of a battery according to an exemplary embodiment;
FIG. 4 is an enlarged schematic view of a portion of the interior of a battery according to one exemplary embodiment;
FIG. 5 is a schematic diagram illustrating a partial structure of a battery according to an exemplary embodiment;
FIG. 6 is a partially enlarged schematic structural view of a portion of a battery according to an exemplary embodiment;
FIG. 7 is a partial schematic diagram of a battery according to one exemplary embodiment;
fig. 8 is a partial structural view of a second insulating film and a cell of a battery according to an exemplary embodiment;
fig. 9 is a partial schematic diagram of a third insulating film and a cell of a battery according to an exemplary embodiment;
fig. 10 is a schematic diagram illustrating a structure of a third insulating film of a battery according to an exemplary embodiment.
The reference numerals are explained below:
10. a battery case; 11. a first housing member; 12. a second housing member; 13. recessing; 20. an electric core; 21. a cell main body; 211. a first surface; 212. a second surface; 22. a lug portion; 221. a first bending region; 222. a second bending region; 30. a first insulating film; 40. a second insulating film; 50. a third insulating film; 51. a main body portion; 52. an extension portion; 60. a fourth insulating film; 70. a patch; 80. 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, so it should 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 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 fig. 10, 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, and the tab part 22 extends out from the side surface of the cell main body 21; a first insulating film 30, the first insulating film 30 being provided so as to cover the cell main body 21; a second insulating film 40, the second insulating film 40 being connected to the first insulating film 30 and provided so as to cover the lug part 22; wherein the width of the second insulating film 40 is larger than the width of the first insulating film 30 in the width direction of the tab portion 22.
The battery of an embodiment of the present invention includes a battery case 10, a battery cell 20, a first insulating film 30 and a second insulating film 40, the first insulating film 30 covers the battery cell main body 21, the second insulating film 40 is connected to the first insulating film 30, and covers the ear portion 22, so that the first insulating film 30 and the second insulating film 40 can insulate the battery cell 20 and the battery case 10. Since the width of the second insulating film 40 is greater than the width of the first insulating film 30 in the width direction of the tab portion 22, and the second insulating film 40 is connected to the first insulating film 30, the first insulating film 30 can be made to reliably cover the cell main body 21, thereby ensuring that the first insulating film 30 and the second insulating film 40 achieve reliable insulation of the cell 20 and the battery case 10, thereby improving the safety performance of the battery.
Note that the first insulating film 30 is provided so as to cover the cell main body 21, the second insulating film 40 is provided so as to cover the lug part 22, and the second insulating film 40 is connected to the first insulating film 30, so that the stability of the arrangement of the first insulating film 30 and the second insulating film 40 can be ensured, thereby ensuring that the first insulating film 30 reliably insulates the cell main body 21 and the battery case 10, and the second insulating film 40 reliably insulates the lug part 22 and the battery case 10. As shown in fig. 4, a width direction of the tab portion 22 may be denoted as a, the width direction a of the tab portion 22 is perpendicular to an extending direction of the tab portion 22, and further, the width direction a of the tab portion 22 may be parallel to a width direction of the cell main body 21.
The battery cell 20 includes a cell main body 21 and two tab portions 22, the two tab portions 22 may be located on two opposite sides of the cell main body 21, one tab portion 22 extends from one side surface of the cell main body 21 along a first direction, the other tab portion 22 extends from the other side surface of the cell main body 21 along a second direction, the first direction and the second direction are opposite, the number of the second insulating films 40 may be two, and the two second insulating films 40 cover the two tab portions 22, respectively, as shown in fig. 3 and fig. 5.
In one embodiment, the first insulating film 30 may be a PET tape or a PI tape, etc., for example, the first insulating film 30 may be a blue PET tape. The second insulating film 40 may be a PET tape or a PI tape, etc., and for example, the second insulating film 40 may be a blue PET tape.
In one embodiment, the width of the second insulating film 40 is greater than the width of the tab portion 22 along the width direction a of the tab portion 22, so as to prevent the two ends of the tab portion 22 from exceeding the two ends of the second insulating film 40 along the width direction a of the tab portion 22, i.e. to ensure that the two ends of the tab portion 22 do not exceed the two ends of the second insulating film 40, thereby realizing reliable covering of the tab portion 22 by the second insulating film 40, and 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.
It should be noted that the tab portion 22 may be used to connect with a terminal assembly, and most of the tab portion 22 is of a bare structure, 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 this embodiment, the second insulating film 40 is disposed to cover the tab portion 22, and the two ends of the tab portion 22 are not beyond the two ends of the second insulating film 40, so that the second insulating film 40 can effectively ensure the insulating arrangement between the tab portion 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, and the tab portion 22 is formed after the multiple single tabs are gathered, so as to form a first bending region 221 on one side of the tab portion 22 close to the cell main body 21; the second insulating film 40 covers the first bending region 221, so that the electrode lug portion 22 and the battery shell 10 are guaranteed to be arranged in an insulating mode, and the second insulating film 40 can be used for bending a plurality of single-piece electrode lugs through a tool, so that warping and chipping caused when the single-piece electrode lugs are folded in are prevented, assembling efficiency and yield of the battery are improved, and safety risks inside the battery are reduced.
The top of a plurality of monolithic utmost point ears can be stamped second insulating film 40, when a plurality of monolithic utmost point ears were taken up and were buckled, the frock can be buckled second insulating film 40 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 and falls the bits when preventing that a plurality of monolithic utmost point ears from taking up to improve the assembly efficiency and the yield of battery, reduce the inside safe risk of battery. When the plurality of single tabs are subjected to bundling and bending, a first bending region 221 as shown in fig. 7 and 8 may be formed.
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 one-piece 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 cell main body 21 and the tab portion 22 is the width direction of a single pole piece.
In one embodiment, the length of the second insulating film 40 exceeding the tab portion 22 in the width direction a of the tab portion 22 is 1mm to 10mm, which not only ensures reliable coverage of the tab portion 22 by the second insulating film 40, but also avoids inconvenience in installation due to an excessively long second insulating film 40.
The length of the second insulating film 40 beyond the tab portion 22 in the width direction a of the tab portion 22 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.
In addition, both ends of the second insulating film 40 may be disposed beyond the tab portion 22 in the width direction a of the tab portion 22. Alternatively, one end of the second insulating film 40 may be disposed beyond the tab part 22 and the other end may be flush with the tab part 22 in the width direction a of the tab part 22.
In one embodiment, as shown in fig. 7 and 8, 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 away from 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 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. 7 and 8, the second insulating film 40 also covers the second bending region 222, so that the second insulating film 40 ensures that the second bending region 222 does not form an electrical connection with the battery case 10.
Considering that the second bending region 222 may be located at the farthest end in the cell length direction, so that the possibility that the second bending region 222 contacts the battery case 10 may increase, the second insulating film 40 also covers the second bending region 222, so that the second insulating film 40 ensures reliable insulation between the second bending region 222 and the battery case 10.
In one embodiment, the end of the second insulating film 40 away from the cell main body 21 extends to between the second bending region 222 and the end of the tab 22 away from the cell main body 21, which not only ensures that the second insulating film 40 can reliably cover the second bending region 222, but also avoids the problem that the second insulating film 40 is too long and inconvenient to install and increases cost.
In one embodiment, the end of the second insulating film 40 away from the cell main body 21 does not exceed the end of the tab portion 22 away from the cell main body 21, that is, the length of the second insulating film 40 covering the tab portion 22 may be less than the length of the tab portion 22, so as to facilitate the arrangement of the second insulating film 40, and also ensure reliable insulation between the tab portion 22 and the battery case 10 by the second insulating film 40.
In one embodiment, as shown in fig. 7, the battery further includes an interposer 70, the interposer 70 is disposed in the battery case 10, and the tab portion 22 covers a portion of the interposer 70; the tab portion 22 is bent from one end of the interposer 70 to form a second bending region 222, so that the tab portion 22 can be ensured to reliably cover a part of the interposer 70, and the contact area between the tab portion 22 and the interposer 70 can be increased, thereby improving the current passing capability between the tab portion 22 and the interposer 70.
In one embodiment, the second insulating film 40 covers the side of the lug portion 22 away from the interposer 70, so as to ensure that the second insulating film 40 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. 7, after the tab portion 22 extends from the side surface of the cell main body 21, the tab portion 22 may be bent at one end of the adaptor sheet 70, so that the tab portion 22 covers the adaptor sheet 70, that is, a part of the tab portion 22 is located inside the adaptor sheet 70, at this time, the second insulating film 40 may cover at least a part of the tab portion 22 located below the adaptor sheet 70, so that the tab portion 22 may be prevented from being bent to generate metal chips, and thus, the insulating performance of the second insulating film 40 is improved.
In one embodiment, as shown in fig. 7, the second insulating film 40 is connected to the cell main body 21, which not only can ensure the connection stability of the second insulating film 40, but also can enable the second insulating film 40 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 second insulating film 40 is connected to the first surface 211, and the second insulating film 40 covers a large surface of the tab portion 22, so that the second insulating film 40 can reliably protect the tab 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 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 second insulation film 40 covers the tab portion 22, so that the second insulation film 40 can effectively protect the insulation between the tab portion 22 and the battery case 10.
In one embodiment, the second insulating film 40 is provided separately from the first insulating film 30, the second insulating film 40 is attached to the upper surface of the first insulating film 30, and the width of the second insulating film 40 is 5mm to 20mm longer than the width of the first insulating film 30 in the width direction a of the tab portion 22, so as to prevent both ends of the first insulating film 30 from protruding beyond both ends of the second insulating film 40 in the width direction a of the tab portion 22, thereby enabling the second insulating film 40 to reliably press the first insulating film 30, thereby ensuring the attachment stability of the first insulating film 30, and preventing the length of the second insulating film 40 from being excessively long, thereby avoiding an increase in cost.
The width of the second insulating film 40 is longer than the width of the first insulating film 30 by 5mm, 6mm, 7mm, 10mm, 12mm, 15mm, 16mm, 18mm, 19mm, 20mm, or the like in the width direction a of the tab portion 22.
In one embodiment, as shown in fig. 3 and 4, the battery further includes a third insulating film 50, the third insulating film 50 is disposed separately from the first insulating film 30, the third insulating film 50 covers a portion of the cell main body 21, the first insulating film 30 is partially adhered to a surface of the third insulating film 50 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 third insulating film 50, that is, a portion of the first insulating film 30 is adhered to the third insulating film 50, and a portion of the first insulating film 30 is adhered to the cell main body 21, so that the third insulating film 50 can be firmly fixed to the cell main body 21, and relative displacement between the third insulating film 50 and the cell main body 21 can be prevented, and thus the cell main body 21 can be prevented from being directly contacted with the battery case 10 after being exposed. The third insulating film 50 may be a mylar film.
In one embodiment, the second insulating film 40 is further connected to the third insulating film 50, so that the connection stability of the third insulating film 50 can be further improved, thereby ensuring that the third insulating film 50 reliably covers the surface of the cell main body 21.
Considering that the width of the second insulating film 40 is 5mm to 20mm longer than the width of the first insulating film 30 in the width direction a of the tab part 22, and the first insulating film 30 is connected to the third insulating film 50, a portion of the second insulating film 40 beyond the first insulating film 30 may be connected to the third insulating film 50.
In one embodiment, the second insulating film 40 also covers the surface of the cell main body 21 not covered by the first insulating film 30 and the third insulating film 50, so that the second insulating film 40 may also be enabled to form insulating protection for the cell main body 21.
In one embodiment, as shown in fig. 9 and 10, the third insulating film 50 includes a main body portion 51 and an extension portion 52, the main body portion 51 covers at least a portion of the cell main body 21, and the extension portion 52 extends from an end of the main body portion 51 along the first direction to be disposed beyond the cell main body 21, so that the extension portion 52 can be used for realizing insulation protection between the opposite pole ear portion 22 and the battery case 10, thereby improving the safety performance of the battery.
In one embodiment, the extension portion 52 extends from a part of the end of the main body portion 51, so that the width of the extension portion 52 is smaller than the width of the main body portion 51, that is, a gap is formed between two ends of the extension portion 52 along the circumferential direction of the main body portion 51, which can reduce the size of the extension portion 52, but does not affect the extension portion 52 to achieve insulation protection between the tab portion 22 and the battery case 10.
As shown in fig. 9 and 10, the extension 52 forms a U-shaped structure, and the extension 52 can protect the electrode tab 22 and the battery case 10 from each other.
The width of the main body 51 refers to the size of the end of the main body 51, and correspondingly, the width of the extension 52 refers to the length of the extension 52 connected with the end of the main body 51.
In some embodiments, it is not excluded that the extension 52 extends from all of the end of the main body 51, such that the width of the extension 52 is equal to the width of the main body 51.
In one embodiment, the cell body 21 includes two first surfaces 211 oppositely disposed and four second surfaces 212 disposed around the first surfaces 211, and the area of the first surfaces 211 is larger than that of the second surfaces 212; wherein the first insulating film 30 covers the first surface 211, and the large surface of the lug part 22 is covered with the second insulating film 40, so that the second insulating film 40 can be surely connected to the first insulating film 30, thereby ensuring the stability of the arrangement of the first insulating film 30 and the second insulating film 40, and improving the insulating protection capability of the first insulating film 30 and the second insulating film 40 with respect to the battery cell 20.
In one embodiment, the first insulating film 30 covers a portion of the first surface 211; the area of the first insulating film 30 covering the first surface 211 is not more than half of the area of the first surface 211, so that the first insulating film 30 can be fixed to the third insulating film 50, the first insulating film 30 can be prevented from being too large, cost increase can be avoided, and the first insulating film 30 can be conveniently arranged, so that the installation efficiency can be improved.
In one embodiment, as shown in fig. 3 to fig. 5, the battery further includes a fourth insulating film 60, and the fourth insulating film 60 covers both the first surface 211 and two adjacent second surfaces 212, that is, the fourth insulating film 60 may cover a corner region of the cell main body 21, so as to ensure that the corner region of the cell main body 21 is protected by the fourth insulating film 60, thereby improving the insulating performance between the cell main body 21 and the battery case 10.
In one embodiment, as shown in fig. 4, the third insulating film 50 covers a portion of the fourth insulating film 60, so that the third insulating film 50 can form a fixation to the fourth insulating film 60, and the fourth insulating film 60 can reliably protect the corner region of the cell main body 21. The fourth insulating film 60 may be a PET tape or a PI tape, etc., and for example, the fourth insulating film 60 may be a blue PET tape.
In one embodiment, as shown in fig. 1 and 2, the battery further includes: the pole assembly 80, the pole assembly 80 is connected with the adapter sheet 70, and a part of the pole assembly 80 is positioned outside the battery shell 10; wherein, the post assembly 80 is disposed on the large surface of the battery casing 10, so that the large surface of the battery casing 10 can provide sufficient supporting force for the post assembly 80, thereby ensuring the stability of the post assembly 80. The pole assembly 80 is connected with the adaptor sheet 70, and the adaptor sheet 70 is connected with the tab part 22, so that the pole assembly 80 can be used as an electrode leading-out terminal of the battery. The pole assembly 80 and the interposer 70 can be welded, or the pole assembly 80 and the interposer 70 can be riveted.
In some embodiments, there are two pole assemblies 80, two pole assemblies 80 are a positive pole assembly and a negative pole assembly, respectively, each pole assembly 80 can include two poles for increasing the current capacity of the battery, there are two pole tabs 22, two pole ears 22 are a positive pole tab and a negative pole tab, respectively, the positive pole assembly is connected to the positive pole tab, and the negative pole assembly is connected to the negative pole tab.
It should be noted that the pole post assembly 80 and the battery case 10 may be insulated from each other, for example, an insulating member may be used for insulation therebetween, or an insulating coating may be used for insulation therebetween, 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 80 is located in the recess 13, so that the pole assembly 80 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 disposed on the battery housing 10, the pole assembly 80 and the recess 13 are respectively disposed on two opposite surfaces of the battery housing 10, and the recess 13 is used for receiving the pole assembly of another battery, so that when the batteries are grouped, the pole assembly of another battery can be received in the recess 13, the pole assembly is prevented from occupying a space between the two batteries, and a distance between two adjacent batteries is reduced, thereby increasing energy density of the battery grouping.
In one embodiment, as shown in fig. 1 and 2, the pole assembly 80 can be two, the recess 13 can be two, the two pole assemblies 80 can be disposed on the same large surface of the battery housing 10, and the two recesses 13 can 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 80 can 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 80, 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 part 11 and the second housing part 12 may be provided independently, as shown in fig. 2. In some embodiments, it is not excluded that the first and second casing members 11, 12 may be a unitary structure, with the space for receiving the cell 20 being formed by stamping and subsequently being closed by welding.
In one embodiment, the length of the cell is a,400mm a 2800mm, the width of the cell is b, the height of the cell is c,2b a 80b, and/or 0.5c b 20c.
Further, b is more than or equal to 80mm 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 800mm to 1800mm, the width of the cell may be 80mm to 180mm, 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, 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 cell refers to a unit formed by winding or laminating a stacking part, wherein the stacking part comprises a first pole piece, a partition and a second pole piece. 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 battery of the battery pack according to an embodiment of the present invention includes a battery case 10, a battery cell 20, a first insulating film 30 and a second insulating film 40, the first insulating film 30 covers the battery cell main body 21, the second insulating film 40 is connected to the first insulating film 30, and the first insulating film 22 covers the battery cell portion, so that the first insulating film 30 and the second insulating film 40 can be used for insulating the battery cell 20 and the battery case 10. Since the width of the second insulating film 40 is greater than the width of the first insulating film 30 in the width direction of the tab portion 22, and the second insulating film 40 is connected to the first insulating film 30, it is possible to make the first insulating film 30 reliably cover the cell main body 21, thereby ensuring that the first insulating film 30 and the second insulating film 40 achieve reliable insulation of the cell 20 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 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 disclosure is limited only by the appended claims.
Claims (10)
1. A battery, comprising:
a battery case (10);
the battery cell (20), the battery cell (20) is disposed in the battery casing (10), the battery cell (20) includes a cell main body (21) and tab portions (22), and the tab portions (22) extend from side surfaces of the cell main body (21);
a first insulating film (30), the first insulating film (30) being provided so as to cover the cell main body (21);
a second insulating film (40), the second insulating film (40) being connected to the first insulating film (30) and provided so as to cover the lug portion (22);
wherein the width of the second insulating film (40) is larger than the width of the first insulating film (30) in the width direction of the tab portion (22).
2. The battery according to claim 1, wherein the width of the second insulating film (40) is larger than the width of the tab portion (22) to avoid both ends of the tab portion (22) from exceeding both ends of the second insulating film (40).
3. The battery according to claim 1, wherein the second insulating film (40) is connected to an upper surface of the first insulating film (30), and a width of the second insulating film (40) is longer than a width of the first insulating film (30) by 5mm to 20mm to prevent both ends of the first insulating film (30) from exceeding both ends of the second insulating film (40).
4. The battery according to claim 1, further comprising a third insulating film (50), wherein the third insulating film (50) is provided separately from the first insulating film (30), wherein the third insulating film (50) covers a portion of the cell body (21), and wherein the first insulating film (30) is partially adhered to a surface of the third insulating film (50) away from the cell body (21) and partially adhered to a surface of the cell body (21) not covered by the third insulating film (50).
5. The battery according to claim 4, wherein the second insulating film (40) is further connected to the third insulating film (50).
6. The battery according to claim 5, wherein the second insulating film (40) also covers the surface of the cell main body (21) which is not covered with the first insulating film (30) and the third insulating film (50).
7. The battery of claim 5, 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 first insulating film (30) covers the first surface (211).
8. The battery according to claim 7, wherein the first insulating film (30) covers a portion of the first surface (211);
wherein the area of the first insulating film (30) covering the first surface (211) is not more than half of the area of the first surface (211).
9. The battery according to claim 7, further comprising a fourth insulating film (60), wherein the fourth insulating film (60) covers both one of the first surfaces (211) and two adjacent second surfaces (212).
10. The battery according to claim 9, wherein the third insulating film (50) covers a portion of the fourth insulating film (60).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221657835.0U CN217589313U (en) | 2022-06-28 | 2022-06-28 | Battery with a battery cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221657835.0U CN217589313U (en) | 2022-06-28 | 2022-06-28 | Battery with a battery cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217589313U true CN217589313U (en) | 2022-10-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221657835.0U Active CN217589313U (en) | 2022-06-28 | 2022-06-28 | Battery with a battery cell |
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| Country | Link |
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| CN (1) | CN217589313U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115566375A (en) * | 2022-11-11 | 2023-01-03 | 深圳海润新能源科技有限公司 | Energy storage device and electric device |
-
2022
- 2022-06-28 CN CN202221657835.0U patent/CN217589313U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115566375A (en) * | 2022-11-11 | 2023-01-03 | 深圳海润新能源科技有限公司 | Energy storage device and electric device |
| CN115566375B (en) * | 2022-11-11 | 2023-03-10 | 深圳海润新能源科技有限公司 | Energy storage device and electric device |
| US11870102B1 (en) | 2022-11-11 | 2024-01-09 | Shenzhen Hithium Energy Storage Technology Co., Ltd. | Energy storage device and electronic device |
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