CN218602568U - Single battery and battery pack - Google Patents
Single battery and battery pack Download PDFInfo
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- CN218602568U CN218602568U CN202222520452.5U CN202222520452U CN218602568U CN 218602568 U CN218602568 U CN 218602568U CN 202222520452 U CN202222520452 U CN 202222520452U CN 218602568 U CN218602568 U CN 218602568U
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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 application discloses battery cell includes: an electrode assembly; a cap assembly; the electrode assembly comprises a shell, a top cover assembly and a plurality of electrodes, wherein the shell is provided with an opening, the top cover assembly covers the opening, the shell and the top cover assembly jointly define a containing cavity, and the electrode assembly is arranged in the containing cavity; the outer wrapping film is made of an insulating material, wraps the circumferential side wall of the shell, is folded at the top wall and the bottom wall of the shell, wraps the bottom wall and part of the top wall of the shell, and is provided with notches corresponding to the top wall and the bottom wall respectively, so that at most two layers of overlapped outer wrapping films are formed in the areas of the top wall and the bottom wall respectively. The utility model provides a single cell, it can effectively solve outer envelope parcel single cell after, the problem that outer envelope upwarps.
Description
Technical Field
The application relates to the technical field of batteries, in particular to a single battery and a battery pack.
Background
In the related art, the insulating film wraps the battery through the crease, after the battery is wrapped, the insulating films are overlapped in the corner areas of the battery, and because the outer sides of the insulating films are not provided with glue layers, namely, viscosity, the overlapped parts of the insulating films are not provided with sticky outer sides which are mutually folded, and the non-sticky outer sides are folded together, the overlapped areas of the insulating films are easy to pop open due to the fact that the non-sticky outer sides are not provided with the sticky outer sides, and the insulating films are prone to being warped at four corners, folded and damaged and the like after being popped open.
SUMMERY OF THE UTILITY MODEL
The present application is directed to solving at least one of the problems in the prior art. Therefore, the application provides a single battery, which can effectively solve the problem that the outer wrapping film warps after the outer wrapping film wraps the single battery.
The application also provides a battery pack with the single battery.
According to the unit cell of the embodiment of the first aspect of the application, including:
an electrode assembly;
a cap assembly;
the electrode assembly comprises a shell, a top cover assembly and a plurality of electrodes, wherein the shell is provided with an opening, the top cover assembly covers the opening, the shell and the top cover assembly jointly define a containing cavity, and the electrode assembly is arranged in the containing cavity;
the outer wrapping film is made of an insulating material, wraps the circumferential side wall of the shell, is folded at the top wall and the bottom wall of the shell, wraps the bottom wall and part of the top wall of the shell, and is provided with notches corresponding to the top wall and the bottom wall respectively, so that at most two layers of overlapped outer wrapping films are formed in the areas of the top wall and the bottom wall respectively.
According to the single battery of the embodiment of the application, at least the following beneficial effects are achieved: because the outer side of the outer wrapping film overlapped inside is adhered to the inner side of the outer wrapping film overlapped outside, the condition that the outer sides of the two layers of the outer wrapping films are not sticky is solved, and the problem that the outer wrapping films warp after the outer wrapping films wrap the single batteries is further solved.
According to the single battery of some embodiments of the present application, the notch includes two cut edges, and one ends of the two cut edges are connected to each other to form a cut corner.
According to the single battery of some embodiments of the application, the size of the chamfer is 30-60 degrees.
According to the single battery of some embodiments of the application, the side wall comprises two opposite large walls and two opposite small walls, the outer wrapping film comprises a first sheet, a second sheet, a third sheet, a fourth sheet and a fifth sheet which are sequentially connected along the length direction of the outer wrapping film, two ends of the first sheet are respectively provided with a first top and a first bottom in an extending manner, two ends of the second sheet are respectively provided with a second top and a second bottom in an extending manner, two ends of the third sheet are respectively provided with a third top and a third bottom in an extending manner, two ends of the fourth sheet are respectively provided with a fourth top and a fourth bottom in an extending manner, and two ends of the fifth sheet are respectively provided with a fifth top and a fifth bottom in an extending manner; the notches comprise a first notch, a second notch, a third notch and a fourth notch, the first notch is arranged at two ends of the second top part along the length direction of the outer wrapping film, the second notch is arranged at two ends of the second bottom part, the third notch is arranged at two ends of the fourth top part, and the fourth notch is arranged at two ends of the fourth bottom part;
the third piece is wrapped on one small wall, the second piece and the fourth piece are wrapped on two large walls respectively, the first piece and the fifth piece are wrapped on the other small wall together, the first top portion, the second top portion, the third top portion, the fourth top portion and the fifth top portion are wrapped on part of the top wall together, at most two layers of overlapped outer wrapping films are formed in the area of the top wall, the first bottom portion, the second bottom portion, the third bottom portion, the fourth bottom portion and the fifth bottom portion are wrapped on the bottom wall together, and at most two layers of overlapped outer wrapping films are formed in the area of the bottom wall.
According to the single battery of some embodiments of the application, along the length direction of the outer wrapping film, the sum of the distance from one end to the other end of the first sheet and the distance from one end to the other end of the fifth sheet is not less than the width of the small wall, so that the outer wrapping film is formed with at most two layers of the outer wrapping film which are overlapped on the small wall.
According to the single cell of some embodiments of the present application, a distance from one end of the first sheet to the other end is greater than a distance from one end of the fifth sheet to the other end along a length direction of the outer wrapping film, or the distance from one end of the first sheet to the other end is less than a distance from one end of the fifth sheet to the other end along the length direction of the outer wrapping film.
According to the single cell of some embodiments of the present application, in the width direction of the outer wrapping film, the sum of the distance from one end to the other end of the second bottom portion and the distance from one end to the other end of the fourth bottom portion is not smaller than the width of the bottom wall, so that the outer wrapping film is formed with at most two layers of the outer wrapping film overlapping on the bottom wall.
According to the single cell of some embodiments of the present application, a distance from one end of the second bottom portion to the other end is greater than a distance from one end of the fourth bottom portion to the other end, or the distance from one end of the second bottom portion to the other end is less than the distance from one end of the fourth bottom portion to the other end, in the width direction of the outer wrapping film.
According to some embodiments of this application, the battery cell still includes the paster, the paster is pasted and is covered a part the roof, first top, the second top, the third top, the fourth top, the fifth top and the paster wrap up in jointly the roof.
A battery pack according to an embodiment of the second aspect of the present application includes:
the battery cell according to any one of the embodiments of the first aspect;
the shell is provided with a storage cavity, and the single batteries are positioned in the storage cavity.
According to the battery pack of the embodiment of the application, at least the following beneficial effects are achieved: because the insulating sealing performance of the single battery is better, and the wrapping film is not easy to warp after being wrapped, the reliability of the single battery is reduced, and therefore, the reliability of the battery pack is higher.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The present application is further described with reference to the following figures and examples, in which:
fig. 1 is a schematic view of an outer envelope in a unit cell according to some embodiments of the present application;
fig. 2 is a schematic view of yet another overwrap film in a cell according to some embodiments of the present application;
fig. 3 is a schematic view of a bottom wall of a housing in a cell according to some embodiments of the present application;
fig. 4 is a schematic view of a top wall of a housing in a cell according to some embodiments of the present application;
fig. 5 is a schematic view of a housing sidewall in a cell of some embodiments of the present application;
fig. 6 is a schematic view of a case not enveloping in a cell of some embodiments of the present application;
fig. 7 is a schematic diagram of the case of the unit cell according to some embodiments of the present application after encapsulation.
Reference numerals:
the shell 10, the side wall 101, the large wall 1011, the small wall 1012, the top wall 102 and the bottom wall 103;
the outer envelope 20, the first sheet 210, the first top 211, the first bottom 212, the second sheet 220, the second top 221, the second bottom 222, the third sheet 230, the third top 231, the third bottom 232, the fourth sheet 240, the fourth top 241, the fourth bottom 242, the fifth sheet 250, the fifth top 251, the fifth bottom 252;
a patch 40.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
In the description of the present application, it should be understood that the positional descriptions referred to, for example, the directions or positional relationships indicated by upper, lower, front, rear, left, right, etc., are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present application.
In the description of the present application, the meaning of a plurality is one or more, the meaning of a plurality is two or more, and the above, below, exceeding, etc. are understood as excluding the present number, and the above, below, within, etc. are understood as including the present number. If there is a description of first and second for the purpose of distinguishing technical features only, this is not to be understood as indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of technical features indicated.
In the description of the present application, unless otherwise expressly limited, terms such as set, mounted, connected and the like should be construed broadly, and those skilled in the art can reasonably determine the specific meaning of the terms in the present application by combining the detailed contents of the technical solutions.
In the description of the present application, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Referring to fig. 1, 3 and 4, in some embodiments, a single battery includes: an electrode assembly, a cap assembly, a case 10, and an outer envelope 20; the casing 10 may be in a rectangular parallelepiped shape or a square shape, the casing 10 has an opening, the top cover assembly covers the opening, the top cover assembly includes a cover plate, the cover plate closes the opening of the casing 10, the casing 10 and the top cover assembly jointly define a containing cavity, the electrode assembly is disposed in the containing cavity, and the electrode assembly includes a battery core and the like;
the outer wrapping film 20 is made of an insulating material, such as a plastic material, the outer wrapping film 20 wraps the circumferential side wall 101 of the shell 10, the outer wrapping film 20 is folded at the top wall 102 and the bottom wall 103 of the shell 10, the top wall 102 and the bottom wall 103 are opposite, and wrap the bottom wall 103 and a part of the top wall 102 of the shell 10, in order to ensure good insulation and insulation sealing, the bottom wall 103 of the shell 10 is completely wrapped, notches 30 are respectively formed at positions, corresponding to the top wall 102 and the bottom wall 103, of the outer wrapping film 20, and at most two layers of overlapped outer wrapping films 20 are respectively formed in the areas of the top wall 102 and the bottom wall 103 of the outer wrapping film 20. Specifically, the inner side of the outer envelope 20 is provided with a glue layer, the outer side is not provided with a glue layer, and further, notches 30 are respectively formed at the positions, corresponding to the top wall 102 and the bottom wall 103, of the outer envelope 20. It is understood that the notches 30 may be formed by cutting, etching, etc. For example, four notches 30 are formed in each of the top wall 102 and the bottom wall 103 of the rectangular casing 10, that is, four notches 30 are formed in four corners of the top wall 102 of the rectangular casing 10, and the bottom wall 103 is also formed. Specifically, since the outer side of the outer cover 20 overlapped inside the outer cover 20 of the single battery is adhered to the inner side of the outer cover 20 overlapped outside, the situation that the outer sides of two layers of the outer cover 20 are not sticky is solved, and the problem that the outer cover 20 is warped after the single battery is wrapped by the outer cover 20 is further solved.
Referring to fig. 1 and 2, in some embodiments, the notch 30 includes two cut edges 301, and one end of the two cut edges 301 are connected to each other to form a cut corner 302. Specifically, two cut edges 301 are formed by cutting the outer envelope 20 twice, so that the notch 30 may be v-shaped in plan view. It is contemplated that cutting the notch 30 twice on the outer envelope 20 facilitates the manufacturing and processing of the outer envelope 20 by a worker, and facilitates the mass production of the outer envelope 20 by a worker so that the outer envelope 20 wraps the case 10. Alternatively, the outer envelope 20 may be cut three times so that the notch 30 has a square shape as viewed from a top view, and thereafter the outer envelope 20 may be formed so that at most two layers of the outer envelope 20 are overlapped on the bottom wall 103 and the top wall 102.
Further, to facilitate the worker cutting the outer wrapper 20 to form the notch 30, referring to FIGS. 1 and 2, in some embodiments, the cut angle 302 is between about 30 degrees and about 60 degrees. Specifically, the size of the cut angle 302 may be 45 degrees, and of course, in addition to the size of the cut angle 302 being 30 degrees to 60 degrees, the cut angle 302 may be 0 degrees to 90 degrees, such as 0 degrees, that is, cut once on the outer envelope 20 to separate the first top portion 211 and the second top portion 221 of the outer envelope 20, so that when the first top portion 211 and the second top portion 221 wrap the top wall 102 of the shell 10, a part of the first top portion 211 can be covered on a part of the second top portion 221 to form at most two layers of the outer envelope 20, and conversely, a part of the second top portion 221 can be covered on a part of the first top portion 211 to form at most two layers of the outer envelope 20.
Referring to fig. 1 and fig. 2, in some embodiments, the side wall 101 includes two opposite large walls 1011 and two opposite small walls 1012, and along the length direction of the outer wrapping film 20, the outer wrapping film 20 includes a first sheet 210, a second sheet 220, a third sheet 230, a fourth sheet 240 and a fifth sheet 250 which are connected in sequence, two ends of the first sheet 210 respectively extend to form a first top portion 211 and a first bottom portion 212, two ends of the second sheet 220 respectively extend to form a second top portion 221 and a second bottom portion 222, two ends of the third sheet 230 respectively extend to form a third top portion 231 and a third bottom portion 232, two ends of the fourth sheet 240 respectively extend to form a fourth top portion 241 and a fourth bottom portion 242, and two ends of the fifth sheet 250 respectively extend to form a fifth top portion 251 and a fifth bottom portion 252;
the notch 30 includes a first cut 303, a second cut 304, a third cut 305 and a fourth cut 306, wherein the first cut 303, the second cut 304, the third cut 305 and the fourth cut 306 are all two, and along the length direction of the outer wrapping film 20, the first cut 303 is disposed at two ends of the second top portion 221, that is, the first cut 303 is cut out on the first top portion 211, the second cut 304 is disposed at two ends of the second bottom portion 222, that is, the second cut 304 is cut out on the second bottom portion 222, the third cut 305 is disposed at two ends of the fourth top portion 241, that is, the third cut 305 is cut out on the fourth top portion 241, the fourth cut 306 is disposed at two ends of the fourth bottom portion 242, that is, the fourth cut 306 is cut out on the fourth bottom portion 242;
further, referring to fig. 2, the first notch 303 may be cut from the second top 221, the first notch 303 may be cut from the first top 211 and the third top 231, the second notch 304 may be cut from the second bottom 222, the second notch 304 may be cut from the first bottom 212 and the third bottom 232, the third notch 305 may be cut from the fourth top 241, the third notch 305 may be cut from the third top 231 and the fifth top 251, the fourth notch 306 may be cut from the fourth bottom 242, and the fourth notch 306 may be cut from the third bottom 232 and the fifth bottom 252;
the third sheet 230 is wrapped on one small wall 1012, the second sheet 220 and the fourth sheet 240 are wrapped on two large walls 1011 respectively, the first sheet 210 and the fifth sheet 250 are wrapped on the other small wall 1012 together, the first top 211, the second top 221, the third top 231, the fourth top 241 and the fifth top 251 are wrapped on part of the top wall 102 together, at most two layers of overlapped outer wrapping films 20 are formed in the area of the top wall 102, the first bottom 212, the second bottom 222, the third bottom 232, the fourth bottom 242 and the fifth bottom 252 are wrapped on the bottom wall 103 together, and at most two layers of overlapped outer wrapping films 20 are formed in the area of the bottom wall 103.
Referring to fig. 3 to 7, specifically, when the outer film 20 wraps the housing 10, it wraps a small wall 1012 of the housing 10, then wraps two large walls 1011 of the housing 10, and finally wraps the top wall 102 and the bottom wall 103 of the housing 10 together, wherein there are at most two layers of the outer film 20 overlapped in the areas of the bottom wall 103 and the top wall 102. Specifically, the overlapping portion of the outer covering film 20 mainly consists of the bottom wall 103 and the top wall 102, and it is conceivable that the side wall 101 of the housing 10 does not have the overlapping portion, so that the width of the housing 10 is not increased by the overlapping outer covering film 20, and thus, when the single battery is placed in the battery pack, a little space can be saved by a single battery, and more space can be saved by a plurality of batteries to place more batteries.
Referring to FIG. 5, in some embodiments, the sum of the distance from one end to the other end of the first sheet 210 and the distance from one end to the other end of the fifth sheet 250 along the length of the overwrap film 20 is not less than the width of the minor wall 1012, such that at most two overlapping layers of overwrap film 20 are formed on the minor wall 1012 of the overwrap film 20. Specifically, in order to wrap the outer film 20 well when wrapping the housing 10 and prevent moisture from entering the housing 10, the width of the small wall 1012 is greater than or equal to that of the first sheet 210 and the second sheet 220 when wrapping the small wall 1012, so as to ensure good wrapping performance. Wherein, the distance from one end of the first sheet 210 to the other end can be equal to the distance from one end of the fifth sheet 250 to the other end, so that the same length can facilitate the modular production of workers.
Further, in order to wrap the small wall 1012, the wrapping property is good, and two layers of the outer wrapping film 20 are overlapped, so, referring to fig. 5, in some embodiments, the distance from one end to the other end of the first sheet 210 is greater than the distance from one end to the other end of the fifth sheet 250 along the length direction of the outer wrapping film 20, or the distance from one end to the other end of the first sheet 210 is less than the distance from one end to the other end of the fifth sheet 250 along the length direction of the outer wrapping film 20. Specifically, when the distance from one end to the other end of the first sheet 210 is greater than the distance from one end to the other end of the fifth sheet 250, the inner side of the first sheet 210 having the adhesive property may be covered on the outer side of the fifth sheet 250 to bring about a better insulation sealing effect. Also, when the distance from one end to the other end of the first sheet 210 is smaller than the distance from one end to the other end of the fifth sheet 250, the adhesive inner side of the fifth sheet 250 may cover the outer side of the first sheet 210 to bring about a better insulation sealing effect.
Referring to fig. 3, in some embodiments, the sum of the distance from one end of the second bottom portion 222 to the other end and the distance from one end of the fourth bottom portion 242 to the other end along the width direction of the outer wrapping film 20 is not less than the width of the bottom wall 103, so that the outer wrapping film 20 is formed with at most two layers of the overlapped outer wrapping film 20 on the bottom wall 103. Specifically, in order to wrap the outer film 20 better when wrapping the casing 10, and prevent outside moisture and the like from entering the casing 10, when wrapping the bottom wall 103 with the second bottom portion 222 and the fourth bottom portion 242, the width of the bottom wall 103 is greater than or equal to that of the bottom wall 103, so as to ensure better wrapping performance. Wherein, the distance from one end of the second bottom portion 222 to the other end thereof may be equal to the distance from one end of the fourth bottom portion 242 to the other end thereof, so that the same length may facilitate the modular production of workers.
Referring to FIG. 3, in some embodiments, the distance from one end of the second bottom portion 222 to the other end is greater than the distance from one end of the fourth bottom portion 242 to the other end along the width direction of the outer wrapper 20, or the distance from one end of the second bottom portion 222 to the other end is less than the distance from one end of the fourth bottom portion 242 to the other end. Specifically, when the distance from one end to the other end of the second bottom portion 222 is greater than the distance from one end to the other end of the fourth bottom portion 242, the inner side of the second bottom portion 222 having the adhesive property may cover the outer side of the fourth bottom portion 242 to bring about a better insulation sealing effect. Also, when the distance from one end to the other end of the second bottom portion 222 is smaller than the distance from one end to the other end of the fourth bottom portion 242, the inner side of the fourth bottom portion 242 having adhesive may cover the outer side of the second bottom portion 222 to provide a better insulation sealing effect.
Referring to FIG. 3, in some embodiments, the distance from one end of the first bottom portion 212 to the other end is equal to the distance from one end of the fifth bottom portion 252 to the other end along the width direction of the outer wrapping film 20, wherein the first bottom portion 212 and the fifth bottom portion 252 are located on one side of the bottom wall 103, the third bottom portion 232 is located on the other side, and the sum of the distance from one end of the third bottom portion 232 to the other end and the distance from one end of the first bottom portion 212 to the other end is not less than the length of the bottom wall 103, so that at most two layers of the outer wrapping film 20 are formed on the bottom wall 103 by the outer wrapping film 20. Specifically, in order to wrap the outer film 20 better when the shell 10 is wrapped, and prevent external moisture and the like from entering the shell 10, when the first bottom portion 212, the third bottom portion 232, and the fifth bottom portion 252 are wrapped on the bottom wall 103, the length of the bottom wall 103 is greater than or equal to that of the bottom wall 103, so as to ensure better wrapping performance. Wherein, the distance from one end of the first bottom 212 to the other end can be equal to the distance from one end of the third bottom 232 to the other end, so that the same length can facilitate the modular production of workers.
Referring to fig. 3, in some embodiments, the distance from one end of the first bottom portion 212 to the other end is equal to the distance from one end of the fifth bottom portion 252 to the other end along the width direction of the outer wrapping film 20, wherein the first bottom portion 212 and the fifth bottom portion 252 are located on one side of the bottom wall 103, the third bottom portion 232 is located on the other side, the distance from one end of the third bottom portion 232 to the other end is greater than the distance from one end of the first bottom portion 212 to the other end, or the distance from one end of the third bottom portion 232 to the other end is less than the distance from one end of the first bottom portion 212 to the other end. Specifically, when the distance from one end to the other end of the third bottom 232 is greater than the distance from one end to the other end of the first bottom 212, the inner side of the third bottom 232 having adhesive may cover the outer sides of the first bottom 212 and the fifth bottom 252 to provide a better insulation sealing effect. Also, when the distance from one end to the other end of the third bottom 232 is smaller than that of the first bottom 212, the sticky inner sides of the first bottom 212 and the fifth bottom 252 may cover the outer side of the third bottom 232 for better insulation sealing effect.
Referring to fig. 6 and 7, in some embodiments, the single battery further includes a patch 40, the patch 40 fits and covers a portion of the top wall 102, and the first top 211, the second top 221, the third top 231, the fourth top 241, the fifth top 251 and the patch 40 jointly wrap the top wall 102. Specifically, the patch 40 helps the housing 10 to further improve the insulation sealing effect, and ensures that the housing 10 has good insulation sealing performance, so that the patch 40 can be attached to the top wall 102 first, and then the first top portion 211, the second top portion 221, the third top portion 231, the fourth top portion 241, and the fifth top portion 251 can be attached to part of the patch 40.
In some embodiments, a battery pack includes: the cell of any one of the above embodiments; the box has the storage chamber, and the battery cell is located the storage intracavity. Specifically, the reliability of the battery pack is high because the insulation sealing performance of the single battery is good and the outer wrapping film 20 is not easy to warp after being wrapped.
The embodiments of the present application have been described in detail with reference to the drawings, but the present application is not limited to the embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present application. Furthermore, the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
Claims (10)
1. A battery cell, comprising:
an electrode assembly;
a cap assembly;
the electrode assembly comprises a shell, a top cover assembly and a plurality of electrodes, wherein the shell is provided with an opening, the top cover assembly covers the opening, the shell and the top cover assembly jointly define a containing cavity, and the electrode assembly is arranged in the containing cavity;
the outer wrapping film is made of an insulating material, wraps the circumferential side wall of the shell, is folded at the top wall and the bottom wall of the shell, wraps the bottom wall and part of the top wall of the shell, and is provided with notches corresponding to the top wall and the bottom wall respectively, so that at most two layers of overlapped outer wrapping films are formed in the areas of the top wall and the bottom wall respectively.
2. The battery cell as recited in claim 1, wherein the notch comprises two cut edges, one end of the two cut edges being connected to each other to form a cut corner.
3. The cell defined in claim 2, wherein the chamfer has a magnitude of 30-60 degrees.
4. The single battery according to claim 1, wherein the side walls comprise two opposite large walls and two opposite small walls, the outer wrapping film comprises a first sheet, a second sheet, a third sheet, a fourth sheet and a fifth sheet which are connected in sequence along the length direction of the outer wrapping film, two ends of the first sheet are respectively extended and provided with a first top and a first bottom, two ends of the second sheet are respectively extended and provided with a second top and a second bottom, two ends of the third sheet are respectively extended and provided with a third top and a third bottom, two ends of the fourth sheet are respectively extended and provided with a fourth top and a fourth bottom, and two ends of the fifth sheet are respectively extended and provided with a fifth top and a fifth bottom;
the notch comprises a first notch, a second notch, a third notch and a fourth notch, the first notch is arranged at two ends of the second top part along the length direction of the outer wrapping film, the second notch is arranged at two ends of the second bottom part, the third notch is arranged at two ends of the fourth top part, and the fourth notch is arranged at two ends of the fourth bottom part;
the third piece is wrapped on one small wall, the second piece and the fourth piece are wrapped on two large walls respectively, the first piece and the fifth piece are wrapped on the other small wall together, the first top portion, the second top portion, the third top portion, the fourth top portion and the fifth top portion are wrapped on part of the top wall together, at most two layers of overlapped outer wrapping films are formed in the area of the top wall, the first bottom portion, the second bottom portion, the third bottom portion, the fourth bottom portion and the fifth bottom portion are wrapped on the bottom wall together, and at most two layers of overlapped outer wrapping films are formed in the area of the bottom wall.
5. The cell according to claim 4, wherein the sum of the distance from one end to the other end of the first sheet and the distance from one end to the other end of the fifth sheet is not less than the width of the small wall in the length direction of the outer wrapping film, so that the outer wrapping film is formed with at most two layers of the outer wrapping film overlapping on the small wall.
6. The battery cell according to claim 5, wherein a distance from one end to the other end of the first sheet is greater than a distance from one end to the other end of the fifth sheet along the length direction of the outer wrapping film, or the distance from one end to the other end of the first sheet is less than a distance from one end to the other end of the fifth sheet along the length direction of the outer wrapping film.
7. The unit cell according to claim 4, wherein a sum of a distance from one end to the other end of the second bottom portion and a distance from one end to the other end of the fourth bottom portion is not smaller than a width of the bottom wall in a width direction of the outer cover film so that the outer cover film is formed with at most two layers of the outer cover film overlapping on the bottom wall.
8. The battery cell according to claim 7, wherein a distance from one end to the other end of the second bottom portion is greater than a distance from one end to the other end of the fourth bottom portion or the distance from one end to the other end of the second bottom portion is less than the distance from one end to the other end of the fourth bottom portion in a width direction of the outer cover film.
9. The battery cell as recited in claim 4, further comprising a patch, wherein the patch is attached to and covers a portion of the top wall, and the first top, the second top, the third top, the fourth top, the fifth top and the patch collectively wrap around the top wall.
10. Battery package, its characterized in that includes:
the cell of any one of claims 1 to 9;
the box has the storage chamber, the battery cell is located store the intracavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222520452.5U CN218602568U (en) | 2022-09-22 | 2022-09-22 | Single battery and battery pack |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222520452.5U CN218602568U (en) | 2022-09-22 | 2022-09-22 | Single battery and battery pack |
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| CN218602568U true CN218602568U (en) | 2023-03-10 |
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| CN202222520452.5U Active CN218602568U (en) | 2022-09-22 | 2022-09-22 | Single battery and battery pack |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116742222A (en) * | 2023-08-16 | 2023-09-12 | 深圳海辰储能控制技术有限公司 | Energy storage device, outer envelope and electronic equipment |
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2022
- 2022-09-22 CN CN202222520452.5U patent/CN218602568U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116742222A (en) * | 2023-08-16 | 2023-09-12 | 深圳海辰储能控制技术有限公司 | Energy storage device, outer envelope and electronic equipment |
| CN116742222B (en) * | 2023-08-16 | 2023-10-13 | 深圳海辰储能控制技术有限公司 | Energy storage device, outer envelope and electronic equipment |
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Address after: 518000 1-2 Floor, Building A, Xinwangda Industrial Park, No. 18 Tangjianan Road, Gongming Street, Guangming New District, Shenzhen City, Guangdong Province Patentee after: Xinwangda Power Technology Co.,Ltd. Address before: 518000 Xinwangda Industrial Park, No.18, Tangjia south, Gongming street, Guangming New District, Shenzhen City, Guangdong Province Patentee before: SUNWODA ELECTRIC VEHICLE BATTERY Co.,Ltd. |
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