CN217983495U - Shell structure and electric core - Google Patents
Shell structure and electric core Download PDFInfo
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- CN217983495U CN217983495U CN202221892664.XU CN202221892664U CN217983495U CN 217983495 U CN217983495 U CN 217983495U CN 202221892664 U CN202221892664 U CN 202221892664U CN 217983495 U CN217983495 U CN 217983495U
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- bottom piece
- piece
- head
- shell structure
- housing structure
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Abstract
The utility model provides a shell structure. The shell structure includes first surface, first side, second surface and the second side that connects gradually through the lateral part weld joint, the first surface the first side the second surface and the second side constitutes one of them part of casing main part through the shaping of buckling, the first surface with the second surface is parallel, the first side with the second side is parallel, the first surface the first side the second surface and the space that the second side encloses to close and forms accepts the chamber for being used for holding the book core. The shell structure of the utility model adopts the sheet metal bending processing, without using a stamping die, the processing cost is reduced; thinner alloy materials can be used in the bending process, so that the internal space of the battery cell is increased; the internal space of the battery cell is increased, and the capacity and the cruising ability are both improved; reduce locating surface and welding route, promote the outward appearance uniformity. In addition, still provide an electricity core that adopts this shell structure.
Description
Technical Field
The utility model relates to a lithium ion battery technical field especially relates to a shell structure and adopt this shell structure's electric core.
Background
Referring to fig. 1, publication No. CN114243092A discloses a square lithium ion battery, in which a case is composed of a top cover plate 1 and a main body case 2, the case is formed by stamping, at least one winding core 3 is disposed in the case, the winding core includes a positive plate and a negative plate disposed on two sides of a separator, the positive plate includes a positive current collector and a positive active material coating region at least partially covering one surface of the positive current collector, and the negative plate includes a negative current collector and a negative active material coating region at least partially covering one surface of the negative current collector.
Because the shell is formed by punching and needs to be stretched, the lower limit size of the thickness is larger, and the cost of a punching die and the shell is higher. The packaging shell is too thick, and occupies the space of the battery core. The head face of the shell is separated from the shell, which increases the processing steps and the cost.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is necessary to provide a casing structure and a battery cell using the casing structure.
The utility model provides a shell structure, include the first surface, first side, second surface and the second side that connect gradually through lateral part weld joint, the first surface the first side the second surface and the second side constitutes one of them part of casing main part through the shaping of buckling, the first surface with the second surface is parallel, the first side with the second side is parallel, the first surface the first side the second surface and the second side encloses the chamber of acceping that closes the space that forms for being used for holding roll core, casing main part is still including locating accept the bottom piece of the one end in chamber, the outer peripheral face of bottom piece with the first surface the first side the second surface and the edge of second side forms head weld joint.
Further, be equipped with on the bottom piece with roll up first utmost point post and the second utmost point post that the core is connected, the second utmost point post with first utmost point post polarity is opposite, still be equipped with on the bottom piece and annotate liquid hole or convex explosion-proof valve, annotate the downthehole sealed nail that is equipped with of liquid.
Further, the casing main part still includes the head piece, the outer peripheral face of head piece with the first surface the first side the second surface and the edge of second side forms head weld joint, the head piece perhaps be equipped with on the bottom piece with roll up first utmost point post and the second utmost point post that the core is connected, the second utmost point post with first utmost point post polarity is opposite, still be equipped with on the bottom piece and annotate liquid hole or convex explosion-proof valve, annotate the downthehole sealed nail that is equipped with of liquid.
Further, the material of the housing main body is stainless steel material or aluminum material.
Further, the thickness range of the shell body is 2.0-20 mm.
Further, the thickness of the head sheet and the bottom sheet ranges from 40 to 300 μm, and the thickness of a frame body formed by enclosing the first surface, the first side surface, the second surface, and the second side surface ranges from 100 to 500 μm.
Furthermore, the side parts of the head piece and the bottom piece extend out of the side part of the frame body by 0-0.3 mm.
Furthermore, the utility model provides an electric core, electric core includes as above arbitrary any shell structure.
The utility model discloses a shell structure and adopt this shell structure's electric core, 1, the shaping mode of casing uses the panel beating bending type, replaces the punching die shaping, reduces face location and welding (connection, combination) route, promotes the welding banding precision; 2. the stamping die is thick in a formed shell, the metal plate is bent and formed in a parallel stitch welding (connection mode), the processing is simple and easy, the cost is reduced, the welding process and the safety of the battery cell are ensured, the thickness of the shell can be greatly reduced, and the shell can be formed as low as 30 micrometers; 3. the shell material can realize diversity, such as ductile steel and other alloy materials.
Specifically, the metal plate is bent, a stamping die is not needed, and the processing cost is reduced; thinner alloy materials can be used in the bending process, so that the internal space of the battery cell is increased; the internal space of the battery cell can be increased, and the capacity and the cruising ability are both improved; the locating surface and the welding path can be reduced, and the appearance consistency is improved.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a schematic perspective view of a conventional square lithium ion battery;
fig. 2 is an expanded view of the housing structure of the present invention;
FIG. 3 is a schematic structural view of the housing structure (except for the top surface) of the present invention;
fig. 4 is a schematic perspective view of the housing structure of the present invention;
FIG. 5 is a schematic view of the location of a top weld joint of an embodiment;
FIG. 6 is a schematic view of the location of another embodiment top weld joint;
FIG. 7 is a schematic view of the location of a further embodiment of a top weld joint;
FIG. 8 is a schematic view of the position of a top weld joint according to yet another embodiment;
FIG. 9 is a schematic view of the location of a top weld joint of yet another embodiment.
The reference numbers in the drawings are as follows:
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Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 2 to 9, the present invention provides a casing structure and a battery cell using the same, where the casing structure includes a first surface 21, a first side surface 22, a second surface 23, and a second side surface 24 sequentially connected by a side portion weld seam 25, the first surface, the first side surface, the second surface, and the second side surface form one of the parts of a casing main body 2 through bending and forming, the first surface is parallel to the second surface, the first side surface is parallel to the second side surface, a space enclosed by the first surface, the first side surface, the second surface, and the second side surface is an accommodating cavity for accommodating a roll core, the casing main body further includes a bottom sheet 6 located at one end of the accommodating cavity, and a head portion weld seam 26 is formed at an outer peripheral surface of the bottom sheet and edges of the first surface, the first side surface, the second surface, and the second side surface.
The utility model discloses a shell structure replaces stamping forming mode through the shaping mode of directly buckling, reduces face location and welding (connection, combination) route, promotes welding banding precision, takes the parallel stitch welding (connection) of shaping mode of buckling with the casing, and processing is simple and easy, and the cost reduction, welding process and electric core safety obtain guaranteeing.
In one embodiment, the bottom sheet is provided with a first pole column 3 and a second pole column 4 which are connected with the winding core, the polarity of the second pole column is opposite to that of the first pole column, the bottom sheet is further provided with a liquid injection hole 5 or a circular arc-shaped explosion-proof valve, and a sealing nail is arranged in the liquid injection hole.
In an embodiment, the casing main part still includes head piece 1, the outer peripheral face of head piece with the first surface, first side, the second surface and the edge of second side forms head weld joint, head piece perhaps be equipped with on the bottom piece with roll up first utmost point post 3 and the second utmost point post 4 that the core is connected, the second utmost point post with first utmost point post polarity is opposite, still be equipped with on the bottom piece and annotate liquid hole 5 or convex explosion-proof valve, annotate the downthehole sealed nail that is equipped with of liquid.
The utility model discloses a shell structure is by six (about, the face of head, the face of left and right sides) or five (about, the face of bottom, the face of left and right sides), and the face components of a whole that can function independently dual mode again to the shaping is buckled to thin panel beating, rewelding or butt fusion.
In one embodiment, the material of the housing body is stainless steel, aluminum or other alloy material.
In one embodiment, the thickness of the housing body ranges from 2.0 to 20mm.
In one embodiment, the thickness of the head sheet and the bottom sheet ranges from 40 to 300 μm. The thickness range of a frame body formed by enclosing the first surface, the first side surface, the second surface and the second side surface is 100-500 mu m.
In one embodiment, the side portions of the head piece and the bottom piece may protrude from the side portion of the frame by 0 to 0.3mm as long as the head piece and the bottom piece can close the housing cavity.
For example, referring to fig. 5, the head piece and the bottom piece may be at the same level as the frame.
For example, referring to fig. 6, the head piece and the bottom piece may extend out of the frame.
For example, referring to fig. 7, the head piece and the bottom piece include a horizontal plate and vertical plates disposed at two ends of the horizontal plate, the two vertical plates are perpendicular to the horizontal plate, a space enclosed by the horizontal plate and the two vertical plates forms a cavity, outer surfaces of the two vertical plates are connected with an inner surface of the frame, and the cavity can face the outside. For example, referring to fig. 8, in another embodiment, the cavity may also be oriented toward the winding core.
For example, referring to fig. 9, in another embodiment, the inner surfaces of the two risers are connected to the outer surface of the frame, and the cavity can also face the winding core.
The utility model discloses a shell structure's assembly method is: the first step, bending and welding the first surface, the first side surface, the second surface and the second side surface to form a square frame, and bending the bottom sheet to be overlapped with the main body and welded to form an accommodating cavity;
and secondly, welding the winding core and the head piece, wherein the winding core and the head piece comprise the first pole and a second pole with the polarity opposite to that of the first pole, and placing the first pole and the second pole into the accommodating cavity.
And thirdly, welding and connecting the head piece cover with the opening of the shell body formed in the first step to form a closed shell picture only with the liquid injection hole.
The utility model discloses a shell structure and adopt this shell structure's electric core, 1, the shaping mode of casing uses the panel beating bending type, replaces the punching die shaping, reduces face location and welding (connection, combination) route, promotes the welding banding precision; 2. the stamping die is thick in a formed shell, the metal plate is bent and formed in a parallel stitch welding (connection mode), the processing is simple and easy, the cost is reduced, the welding process and the safety of the battery cell are ensured, the thickness of the shell can be greatly reduced, and the shell can be formed as low as 30 micrometers; 3. the shell material can realize diversity, such as ductile steel and other alloy materials.
Specifically, the metal plate is bent, a stamping die is not needed, and the processing cost is reduced; thinner alloy materials can be used in the bending process, so that the internal space of the battery cell is increased; the internal space of the battery cell can be increased, and the capacity and the cruising ability are both improved; the positioning surface and the welding path can be reduced, and the appearance consistency is improved.
The above embodiments only express the embodiments of the present invention, and the description thereof is specific and detailed, but not to be understood as the limitation of the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (8)
1. A shell structure, characterized in that: include the first surface, first side, second surface and the second side that connect gradually through the lateral part weld joint, the first surface the first side the second surface and the second side constitutes one of them part of casing main part through the shaping of buckling, the first surface with the second surface is parallel, the first side with the second side is parallel, the first surface the first side the second surface and the space that the second side encloses to close forms accepts the chamber for being used for holding the book core, the casing main part is still including locating the bottom piece of the one end of accepting the chamber, the outer peripheral face of bottom piece with the first surface the first side the second surface and the edge of second side forms the head weld joint.
2. The housing structure of claim 1, wherein: the bottom piece is provided with a first pole column and a second pole column which are connected with the winding core, the polarity of the second pole column is opposite to that of the first pole column, the bottom piece is further provided with a liquid injection hole or a circular arc-shaped explosion-proof valve, and the liquid injection hole is internally provided with a sealing nail.
3. The housing structure of claim 1, wherein: the casing main part still includes the head piece, the outer peripheral face of head piece with the first surface the first side the second surface and the edge of second side forms head welded joint, the head piece perhaps be equipped with on the bottom piece with roll up first utmost point post and the second utmost point post that the core is connected, the second utmost point post with first utmost point post polarity is opposite, still be equipped with on the bottom piece and annotate liquid hole or convex explosion-proof valve, annotate the downthehole sealed nail that is equipped with of liquid.
4. A housing structure according to claim 3, characterized in that: the shell body is made of stainless steel materials or aluminum materials.
5. The housing structure of claim 4, wherein: the thickness range of the shell body is 2.0-20 mm.
6. The housing structure of claim 5, wherein: the thickness range of the head piece and the bottom piece is 40-300 mu m, and the thickness range of a frame body formed by enclosing the first surface, the first side surface, the second surface and the second side surface is 100-500 mu m.
7. The housing structure of claim 6, wherein: the side parts of the head piece and the bottom piece extend out of the side part of the frame body by 0-0.3 mm.
8. An electric core, its characterized in that: the cell comprises the casing structure of any of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221892664.XU CN217983495U (en) | 2022-07-22 | 2022-07-22 | Shell structure and electric core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221892664.XU CN217983495U (en) | 2022-07-22 | 2022-07-22 | Shell structure and electric core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217983495U true CN217983495U (en) | 2022-12-06 |
Family
ID=84280397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221892664.XU Active CN217983495U (en) | 2022-07-22 | 2022-07-22 | Shell structure and electric core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217983495U (en) |
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2022
- 2022-07-22 CN CN202221892664.XU patent/CN217983495U/en active Active
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