Integrated battery shell structure and battery

Abstract

The utility model relates to the technical field of batteries, in particular to an integrated battery shell structure and a battery, the integrated battery shell structure comprises a shell, a bottom cover and an integrated top cover, a cavity for accommodating a battery cell is formed in the shell, and the top of the shell is provided with a through hole. The bottom cover is welded to the bottom of the shell. The integrated top cover is welded to the through hole in the top of the shell and covers the through hole, the integrated top cover comprises a positive terminal and a cover body steel sheet, and the cover body steel sheet is welded to the shell. The utility model solves the problems that after the depth of the shell of the existing button cell is increased, the welding difficulty of the tab and the shell is large, the welding is not firm, pseudo soldering is easy to occur, the resistance is large, the internal short circuit is caused, and the qualified yield is influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to an integrated battery housing structure and a battery. Background Art

[0002] With the increasing progress of electronic technology and the development of life intelligence, in order to be convenient to carry, the appearance of portable electronic devices on the market is designed to be thinner and lighter. Therefore, it is also required that the button batteries included in them are designed to be smaller and the battery energy density is larger.

[0003] Most of the existing button batteries compound the negative terminal and the positive terminal on a steel sheet and then weld and seal them with the battery housing. For the batteries with such a structure, as the height of the battery changes and the depth of the housing increases, it will lead to great difficulty in welding the ear with the housing, poor welding, easy occurrence of virtual welding, resulting in large resistance, internal short circuit, and affecting the qualification rate of yield. Summary of the Utility Model

[0004] In view of this, the purpose of the utility model is to provide an integrated battery housing structure and a battery, so as to at least solve the problems that after the depth of the housing of the existing button battery increases, it leads to great difficulty in welding the ear with the housing, poor welding, easy occurrence of virtual welding, and further leads to large resistance, internal short circuit, and affects the qualification rate of yield.

[0005] The utility model solves the above technical problems through the following technical means:

[0006] In the first aspect, the utility model provides an integrated battery housing structure, including:

[0007] A housing, the interior of the housing forms a cavity for accommodating an electric core, and the top of the housing has a through hole;

[0008] A bottom cover, welded to the bottom of the housing;

[0009] An integrated top cover, welded at the through hole at the top of the housing and covering the through hole, the integrated top cover is installed in a sunken manner at the top of the housing; the integrated top cover includes a positive terminal and a cover body steel sheet, and the cover body steel sheet is welded to the housing.

[0010] In combination with the first aspect, in some embodiments, a circular ring piece is formed by sinking at a position near the through hole at the top of the housing, and one end of the cover body steel sheet is welded to the circular ring piece.

[0011] In combination with the first aspect, in some embodiments, one end of the cover body steel sheet is folded upwards to form a welding ring, and the welding ring is welded to the top of the housing.

[0012] In combination with the first aspect, in some embodiments, a through hole is provided at the middle position of the cover body steel sheet, and the cover body steel sheet is sleeved on the positive terminal through the through hole.

[0013] In combination with the first aspect, in some embodiments, the positive terminal has a flat portion and a convex portion. The flat portion is used to connect the positive electrode tab strip, and a gap is maintained between the flat portion and the housing; the cover steel sheet is sleeved outside the convex portion, and a gap is maintained between the cover steel sheet and the convex portion. An insulating adhesive is pasted between the cover steel sheet and the flat portion.

[0014] In combination with the first aspect, in some embodiments, the gap width dimension between the insulating adhesive and the convex portion is smaller than the gap width dimension between the cover steel sheet and the convex portion.

[0015] For the integrated battery housing of the present utility model, the positive terminal and the cover steel sheet are integrated to form an integrated top cover, and the integrated top cover is installed in a sunken manner at the top of the housing. The positive electrode tab strip is welded to the bottom of the integrated top cover. The sunken installation of the integrated top cover can balance the problem of increased height caused by assembly stacking, maintain the energy density without increasing the height (i.e., thickness) of the battery, and avoid the problems of increased depth of the existing battery housing, difficult welding between the tab strip and the housing, poor welding, easy occurrence of virtual welding, large resistance, internal short circuit, and affecting the yield and qualification.

[0016] In a second aspect, the present utility model provides a battery, and the battery includes the integrated battery housing structure described in the first aspect above.

[0017] In combination with the second aspect, in some embodiments, the battery further includes a battery cell. Both ends of the battery cell respectively have a positive electrode tab strip and a negative electrode tab strip. The battery cell is located inside the housing. The positive electrode tab strip is welded to the integrated top cover, and the negative electrode tab strip is welded to the bottom cover.

[0018] The battery of the present utility model combines the advantages of internal welding and external welding assembly, is convenient for welding operation, and improves the assembly efficiency and battery qualification rate to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of the integrated battery housing structure of Embodiment 1;

[0020] Figure 2 It is a schematic structural diagram of the integrated battery housing structure of Embodiment 2;

[0021] Figure 3 It is a schematic structural diagram of the battery of Embodiment 3;

[0022] Figure 4 It is an exploded structural diagram of the battery of Embodiment 3;

[0023] Figure 5 It is a schematic structural diagram of the battery of Embodiment 4;

[0024] Among them, there are a housing 100, a through hole 110, an annular plate 120, a bottom cover 200, an integrated top cover 300, a positive terminal 310, a flat plate portion 311, a convex portion 312, a cover body steel sheet 320, a via hole 321, a welding ring 322, an insulating adhesive 330, a cavity 0, a battery cell 400, a positive electrode tab strip 410, and a negative electrode tab strip 420. Specific embodiments

[0025] The following specific embodiments are used to illustrate the implementation manners of the present utility model. Those skilled in the art can understand the advantages and effects of the present utility model from the content disclosed in this specification. It should be noted that the diagrams provided in the following embodiments are only for illustrative purposes, showing only schematic diagrams rather than actual diagrams, and should not be construed as a limitation to the present utility model. In order to better illustrate the embodiments of the present utility model, some components in the diagrams will be omitted, enlarged or reduced, which do not represent the dimensions of the actual products; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the diagrams may be omitted.

[0026] In the diagrams of the embodiments of the present utility model, the same or similar reference numerals correspond to the same or similar components. In the description of the present utility model, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the diagrams. This is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the diagrams are only for illustrative purposes and should not be construed as a limitation to the present utility model. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0027] For the integrated battery housing structure and battery of the present utility model, please specifically refer to Embodiments 1-4 and Figures 1-5 :

[0028] Embodiment 1

[0029] Please refer to Figure 1 and Figure 3 . The integrated battery housing structure of this embodiment includes a housing 100, a bottom cover 200, and an integrated top cover 300. The inside of the housing 100 forms a cavity 0 for accommodating the battery cell. The top of the housing 100 has a through hole 110. The bottom cover 200 is welded to the bottom of the housing 100. The integrated top cover 300 is welded at the through hole 110 at the top of the housing 100 and covers the through hole 110. The integrated top cover 300 is installed in a sunken manner on the top of the housing 100; the integrated top cover 300 includes a positive terminal 310 and a cover body steel sheet 320, and the cover body steel sheet 320 is welded to the housing 100.

[0030] Through the above technical solution, the positive terminal 310 and the cover steel sheet 320 are integrated to form the integrated top cover 300, and the integrated top cover 300 is installed in a sunken manner on the top of the housing 100. The positive electrode tab is welded to the bottom of the integrated top cover 300. The sunken installation of the integrated top cover 300 can balance the problem of height increase caused by assembly stacking, maintain the energy density without increasing the height (i.e., thickness) of the battery, and avoid the increase in the depth of the housing of the existing battery, which leads to difficulties in welding the tab to the housing, poor welding, easy occurrence of virtual welding, resulting in large resistance, internal short circuit, and affecting the yield qualification, etc.

[0031] The size of the through hole 110 at the top of the housing 100 can vary according to the battery assembly requirements.

[0032] In this embodiment, a circular ring piece 120 is formed by sinking at a position near the through hole 110 at the top of the housing 100, and one end of the cover steel sheet 320 is welded to the circular ring piece 120. The sunken installation of the integrated top cover 300 is realized through the sunken circular ring piece 120 to balance the problem of height increase caused by assembly stacking.

[0033] In this embodiment, a through hole 321 is provided at the middle position of the cover steel sheet 320, and the cover steel sheet 320 is sleeved on the positive terminal 310 through the through hole 321.

[0034] In this embodiment, the positive terminal 310 has a flat plate portion 311 and a convex portion 312. The flat plate portion 311 is used to connect the positive electrode tab, and a gap is maintained between the flat plate portion 311 and the housing 100; the cover steel sheet 320 is sleeved outside the convex portion 312, and a gap is maintained between the cover steel sheet 320 and the convex portion 312. An insulating adhesive 330 is pasted between the cover steel sheet 320 and the flat plate portion 311. It should be noted that the cover steel sheet 320 only contacts the housing 100, the cover steel sheet 320 and the positive terminal 310 never contact, and the cover steel sheet 320 is isolated from the positive terminal 310 through the insulating adhesive 330 to avoid battery short circuit.

[0035] In this embodiment, the gap width dimension between the insulating adhesive 330 and the convex portion 312 is smaller than the gap width dimension between the cover steel sheet 320 and the convex portion 312. That is, the edge of the insulating adhesive 330 is closer to the convex portion 312, fully isolating the cover steel sheet 320 from the positive terminal 310 to avoid battery short circuit.

[0036] Embodiment 2

[0037] Please refer to Figure 2 and Figure 5, the integrated battery housing 100 structure of this embodiment includes a housing 100, a bottom cover 200, and an integrated top cover 300. The interior of the housing 100 forms a cavity 0 for accommodating the battery cells, and the top of the housing 100 has a through hole 110. The bottom cover 200 is welded to the bottom of the housing 100. The integrated top cover 300 is welded at the through hole 110 at the top of the housing 100 and covers the through hole 110. The integrated top cover 300 is installed in a sunken manner on the top of the housing 100; the integrated top cover 300 includes a positive terminal 310 and a cover steel sheet 320, and the cover steel sheet 320 is welded to the housing 100.

[0038] In this embodiment, one end of the cover steel sheet 320 is folded upwards to form a welding ring 322, and the welding ring 322 is welded to the top of the housing 100. One side cross-section of the cover steel sheet 320 is similar to a Z shape. By welding the welding ring 322 on the upper part of the cover steel sheet 320 similar to a Z shape to the housing, the sunken installation of the integrated top cover 300 is realized, which is used to balance the problem of height increase caused by assembly stacking.

[0039] In this embodiment, a through hole 321 is provided at the middle position of the cover steel sheet 320, and the cover steel sheet 320 is sleeved on the positive terminal 310 through the through hole 321.

[0040] In this embodiment, the positive terminal 310 has a flat plate portion 311 and a convex portion 312. The flat plate portion 311 is used to connect the positive electrode tab strip, and a gap is maintained between the flat plate portion 311 and the housing 100; the cover steel sheet 320 is sleeved outside the convex portion 312, and a gap is maintained between the cover steel sheet 320 and the convex portion 312. An insulating adhesive 330 is pasted between the cover steel sheet 320 and the flat plate portion 311. It should be noted that the cover steel sheet 320 only contacts the housing 100, the cover steel sheet 320 and the positive terminal 310 never contact, and the cover steel sheet 320 is isolated from the positive terminal 310 through the insulating adhesive 330 to avoid battery short circuit.

[0041] In this embodiment, the gap width dimension between the insulating adhesive 330 and the convex portion 312 is smaller than the gap width dimension between the cover steel sheet 320 and the convex portion 312.

[0042] Embodiment 3

[0043] Please refer to Figure 3 and Figure 4 , the battery of this embodiment includes the integrated battery housing 100 structure of Embodiment 1, and a battery cell 400. The two ends of the battery cell 400 respectively have a positive electrode tab strip 410 and a negative electrode tab strip 420. The battery cell 400 is located inside the housing 100. The positive electrode tab strip 410 is welded to the integrated top cover 300, and the negative electrode tab strip 420 is welded to the bottom cover 200.

[0044] When assembling the battery of this embodiment, the positive tab strip 410 and the negative tab strip 420 of the battery cell can be externally welded respectively first, and then installed into the housing 100. Subsequently, the top peripheral welding (i.e., the welding of the cover steel sheet 320 and the housing 100) and the bottom peripheral welding (i.e., the welding of the bottom cover 200 and the housing 100) are carried out. It is also possible to carry out the top peripheral welding first and then operate according to the conventional battery assembly process. The battery of this embodiment has the advantages of being compatible with both internal welding and external welding assembly, with convenient welding operation, and to a certain extent, improving the assembly efficiency and the battery qualification rate.

[0045] Embodiment 4

[0046] Please refer to Figure 5 , the battery of this embodiment includes the integrated battery housing 100 structure of Embodiment 2 and the battery cell 400. Both ends of the battery cell 400 are respectively provided with a positive tab strip 410 and a negative tab strip 420. The battery cell 400 is located inside the housing 100. The positive tab strip 410 is welded to the integrated top cover 300, and the negative tab strip 420 is welded to the bottom cover 200.

[0047] The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention. The technologies, shapes, and structures not described in detail in the present invention are all well-known technologies.

Claims

1. An integrated battery housing structure, characterized in that: include: A shell, the interior of which forms a cavity for accommodating the battery cell, and the top of the shell has a through hole; A bottom cover, welded to the bottom of the shell; The integrated top cover is welded at the through hole on the top of the shell and covers the through hole, and the integrated top cover is sunken installed on the top of the shell; the integrated top cover includes a positive terminal and a cover steel sheet, and the cover steel sheet is welded to the shell.

2. The integrated battery housing structure according to claim 1, characterized in that: The top of the shell body is sunken near the through hole to form a circular ring piece, and one end of the cover body steel sheet is welded to the circular ring piece.

3. The integrated battery housing structure according to claim 1, characterized in that: One end of the cover steel sheet is folded upward to form a welding ring, and the welding ring is welded to the top of the shell.

4. The integrated battery housing structure according to claim 1, 2 or 3, characterized in that: A through hole is provided in the middle of the cover steel sheet, and the cover steel sheet is sleeved on the positive terminal through the through hole.

5. The integrated battery housing structure according to claim 4, characterized in that: The positive terminal has a flat portion and a convex portion, the flat portion is used to connect the positive electrode ear bar, and a gap is maintained between the flat portion and the shell; the cover steel sheet is sleeved on the outside of the convex portion, and a gap is maintained between the cover steel sheet and the convex portion, and insulating glue is pasted between the cover steel sheet and the flat portion.

6. The integrated battery housing structure according to claim 5, characterized in that: The width of the gap between the insulating glue and the convex portion is smaller than the width of the gap between the cover steel sheet and the convex portion.

7. A battery, characterized in that The battery comprises an integrated battery housing structure as claimed in any one of claims 1-6.

8. The battery according to claim 7, characterized in that The battery also includes a battery cell, which has a positive pole tab bar and a negative pole tab bar at both ends, respectively. The battery cell is located in a shell, the positive pole tab bar is welded to an integrated top cover, and the negative pole tab bar is welded to a bottom cover.

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