CN210110948U - Electrode structure of winding electrode battery - Google Patents
Electrode structure of winding electrode battery Download PDFInfo
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- CN210110948U CN210110948U CN201921374352.8U CN201921374352U CN210110948U CN 210110948 U CN210110948 U CN 210110948U CN 201921374352 U CN201921374352 U CN 201921374352U CN 210110948 U CN210110948 U CN 210110948U
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The utility model provides a winding electrode battery electrode structure, which comprises a lower shell and an upper cover made of stainless steel, wherein a winding core and an electrode isolation assembly wound outside the winding core are fixed at the middle parts in the lower shell and the upper cover, and the periphery of the electrode isolation assembly is provided with a positive electrode lug and a negative electrode lug which respectively extend towards the upper part and the lower part of the electrode isolation assembly; the positive pole lug is connected with the positive pole piece and is made of aluminum; the negative pole tab is connected with the negative pole piece and is made of nickel; the surface of the up end of anodal utmost point ear still is connected with the material and is the nickel piece of nickel, nickel piece and upper cover lower surface welded connection, the utility model discloses utilize above-mentioned structure can guarantee utmost point ear welded problem, prevent the pine and take off, improve the security.
Description
Technical Field
The utility model relates to a coiling electrode battery electrode structure.
Background
A cylindrical electrode assembly formed by winding a strip-shaped positive electrode and a strip-shaped negative electrode (Swiss-roll electrode) with a separator interposed therebetween is placed in a cylindrical container. The electrode in this form has large surface area and compact structure, and is commonly used as a sub-chemical power source, and sometimes an electrolytic battery is also adopted. The connection that conveniently carries out the cylinder battery in order to improve machining efficiency needs carry out welded connection with the utmost point ear that extends respectively with two upper and lower terminal surfaces of electrode, utmost point ear divide into three kinds of materials, aluminium (Al) material is used to the anodal of battery, nickel (Ni) material is used to the negative pole, the negative pole also has copper nickel plating (Ni-Cu) material, the shell of columniform battery adopts stainless steel material usually, the pine takes off appears easily with stainless steel material's casing welding process of the anodal utmost point ear of aluminium material under the state that generates heat in the during operation, the security performance is poor.
SUMMERY OF THE UTILITY MODEL
The utility model discloses improve above-mentioned problem, promptly the to-be-solved technical problem of the utility model is that the pine takes off, the security performance is poor easily appears in the casing welding process with stainless steel of the anodal utmost point ear of aluminium material.
The utility model discloses a concrete implementation scheme is: an electrode structure of a wound electrode battery comprises a lower shell and an upper cover, wherein a winding core and an electrode isolation assembly wound outside the winding core are fixed at the middle parts in the lower shell and the upper cover, the electrode isolation assembly comprises a strip-shaped positive electrode plate and a strip-shaped negative electrode plate, and an isolator for isolating the negative electrode plate and the positive electrode plate is clamped between the positive electrode plate and the negative electrode plate;
the positive pole lug is connected with the positive pole piece and is made of aluminum;
the negative pole tab is connected with the negative pole piece and is made of nickel;
the outer surface of the upper end surface of the positive electrode lug is also connected with a nickel sheet made of nickel, and the nickel sheet is welded with the lower surface of the upper cover;
the positive electrode tab and the negative electrode tab are bent and attached to the upper surface and the lower surface of the electrode isolation assembly;
the negative pole utmost point ear and lower casing middle part welded connection, upper cover and lower casing material are stainless steel.
Furthermore, the inner surfaces of the positive electrode lug and the negative electrode lug are adhered with insulating patches.
Furthermore, the end part of the anode tab extending out is provided with a punched hole, and welding spots are arranged on the peripheral sides of the nickel sheet and the anode tab.
Furthermore, the upper edge of the lower shell is buckled with an explosion-proof cover, and the upper cover is connected with the periphery of the lower shell in a pressing and riveting mode at the periphery of the explosion-proof cover and the upper cover.
Further, the explosion-proof cover is made of rubber or plastic.
Furthermore, arc-shaped notches are formed in the two sides of the bending portions of the positive electrode lug and the negative electrode lug.
Further, the nickel sheet is flush with the upper end part of the positive electrode lug.
Compared with the prior art, the utility model discloses following beneficial effect has: the utility model discloses utilize above-mentioned structure can guarantee utmost point ear welded problem, prevent that the pine from taking off, improve the security.
Drawings
Fig. 1 is the three-dimensional structure diagram of the electrode isolation assembly and the electrode tab of the present invention.
Fig. 2 is the structure schematic diagram of the negative electrode tab of the utility model.
Fig. 3 is the schematic diagram of the positive electrode tab structure of the present invention.
Fig. 4 is a structural schematic diagram of a positive electrode tab welding nickel sheet of the present invention.
Fig. 5 is the schematic view of the two-pin welding structure of the positive electrode tab and the inner part of the upper cover.
Fig. 6 is the schematic view of the single-needle welding structure of the positive electrode tab and the inside of the upper cover.
Fig. 7 is the utility model discloses the structure schematic diagram positive pole ear has been seted up and has been punched a hole the structure schematic diagram.
Fig. 8 is the schematic view of the external double-needle welding structure of the positive electrode tab and the upper cover of the utility model.
Fig. 9 is a schematic structural view of the anode tab welding nickel sheet of the present invention.
Fig. 10 is a side view of the positive electrode tab of fig. 9 according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 to 10, an electrode structure of a wound electrode battery includes a lower case 10 and an upper cover 20, a winding core 30 and an electrode isolation assembly 110 wound outside the winding core are fixed at the middle parts of the lower case 10 and the upper cover 20, the electrode isolation assembly includes strip-shaped positive electrode sheets and strip-shaped negative electrode sheets, an isolator for isolating the negative electrode sheets and the positive electrode sheets is sandwiched between the positive electrode sheets and the negative electrode sheets, and the electrode isolation assembly has a positive electrode tab 40 and a negative electrode tab 50 extending to the upper part and the lower part of the electrode isolation assembly respectively;
the winding core 30 is a hollow plastic cylinder, the central part of the winding core is provided with an axial cavity, the positive pole tab is connected with the positive pole piece, and the material is aluminum; the negative pole tab is connected with the negative pole piece and is made of nickel;
the outer surface of the upper end surface of the positive electrode tab 40 is also connected with a nickel sheet 410 made of nickel, and the nickel sheet 410 is welded with the lower surface of the upper cover 20;
the positive electrode tab and the negative electrode tab are bent and attached to the upper surface and the lower surface of the electrode isolation assembly;
the negative pole utmost point ear and lower casing middle part welded connection, upper cover and lower casing material are stainless steel.
In order to overcome the casing welding process of traditional anodal utmost point ear of aluminium material and stainless steel and appear taking off easily, the defect that the security performance is poor, the utility model discloses thereby it is firm to utilize the welding that welds nickel piece 410 on anodal utmost point ear of aluminium matter 40 and satisfy anodal utmost point ear 40 and upper cover.
The inner surfaces of the positive electrode lug and the negative electrode lug are attached with insulating patches 60, the insulating patches 60 are generally made of insulating adhesive tapes, such as polypropylene materials, or other insulating materials, and the structure prevents the inner surfaces of the positive electrode lug and the negative electrode lug from contacting with the edge of a positive plate or a negative plate.
In this embodiment, the nickel plate is flush with the upper end of the positive electrode tab and welded to the outer surface of the positive electrode tab.
Embodiment two, the both sides of anodal utmost point ear and negative pole utmost point ear kink have arc and lack groove (420, 510), and the design that the arc lacked groove (420, 510) can satisfy can not appear arching in anodal utmost point ear and the in-process both sides that negative pole utmost point ear is buckled and cause anodal utmost point ear to produce extrusion deformation when leading to upper cover and lower casing seal, and on the other hand also can provide short-circuit protection's function through the design that the arc lacked the groove, and the upper shell can stimulate anodal utmost point ear and break and then realize breaking circuit protection in the department of buckling when battery abnormal state temperature is too high and bloated.
In this embodiment, the upper edge of the lower housing is covered with an explosion-proof cover 70, the upper cover is arranged at the periphery of the explosion-proof cover, the upper cover is connected with the periphery of the lower housing by riveting, and the explosion-proof cover is made of rubber or plastic.
The utility model discloses still include a method of making winding electrode battery electrode structure as above, specifically include following step:
(1) preparing an upper cover, a lower shell and an electrode isolation assembly which are made of stainless steel, wherein the upper part of the electrode isolation assembly extends to form a positive electrode lug, and the lower part of the electrode isolation assembly extends to form a negative electrode lug;
(2) the upper end of the positive electrode lug is welded and connected with a nickel sheet, and the inner surfaces of the positive electrode lug and the negative electrode lug are attached with insulating patches so as to prevent the inner surfaces of the positive electrode lug and the negative electrode lug from contacting with the edge of the positive electrode sheet or the negative electrode sheet;
(3) bending the negative pole tab and attaching the inner side of the negative pole tab to the lower surface of the electrode isolation assembly;
(4) an electrode isolation component is arranged in the lower shell, and the outer surface of a cathode tab is welded with the middle part of the upper surface of the lower shell;
(5) the nickel sheet is welded with the upper cover, and the bent inner side of the positive electrode tab is attached to the upper surface of the electrode isolation assembly;
(6) the upper cover is pressed with the lower shell.
In the above embodiment, as shown in the figures, the utility model provides a welding mode of three kinds of positive pole utmost point ears and upper cover includes following three kinds of schemes
The first scheme is as follows: punching 440 a positive electrode lug and then performing laser welding with a nickel sheet; flattening the positive pole lug, and performing double-needle welding or single-needle welding on the outer part after the upper cover and the inner cover are pressed;
the second scheme is as follows: welding the positive electrode lug and the nickel sheet by laser; flattening the positive pole lug, wherein welding points 430 are arranged on the nickel sheet and the periphery of the upper end of the positive pole lug, and the inner part of the upper cover is subjected to single-needle welding after the upper cover and the inner cover are pressed;
in the third scheme: welding the positive electrode lug and the nickel sheet by laser; flattening the positive pole lug, wherein welding points are arranged on the nickel sheet and the periphery of the upper end of the positive pole lug, and the upper cover and the inner cover are pressed together and then are welded by double needles.
Any technical solution disclosed in the present invention is, unless otherwise stated, disclosed a numerical range if it is disclosed, and the disclosed numerical range is a preferred numerical range, and any person skilled in the art should understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Because numerical value is more, can't be exhaustive, so the utility model discloses just disclose some numerical values with the illustration the technical scheme of the utility model to, the numerical value that the aforesaid was enumerated should not constitute right the utility model discloses create the restriction of protection scope.
If the terms "first," "second," etc. are used herein to define parts, those skilled in the art will recognize that: the terms "first" and "second" are used merely to distinguish one element from another in a descriptive sense and are not intended to have a special meaning unless otherwise stated.
Also, above-mentioned the utility model discloses if disclose or related to mutually fixed connection's spare part or structure, then, except that other the note, fixed connection can understand: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).
In addition, the terms used in any aspect of the present disclosure as described above to indicate positional relationships or shapes include similar, analogous, or approximate states or shapes unless otherwise stated.
The utility model provides an arbitrary part both can be assembled by a plurality of solitary component parts and form, also can be the solitary part that the integrated into one piece technology was made.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.
Claims (8)
1. An electrode structure of a wound electrode battery comprises a lower shell and an upper cover, wherein a winding core and an electrode isolation assembly wound outside the winding core are fixed at the middle parts in the lower shell and the upper cover, the electrode isolation assembly comprises a strip-shaped positive electrode plate and a strip-shaped negative electrode plate, and an isolator for isolating the negative electrode plate and the positive electrode plate is clamped between the positive electrode plate and the negative electrode plate;
the positive pole lug is connected with the positive pole piece and is made of aluminum;
the negative pole tab is connected with the negative pole piece and is made of nickel;
the outer surface of the upper end surface of the positive electrode lug is also connected with a nickel sheet made of nickel, and the nickel sheet is welded with the lower surface of the upper cover;
the positive electrode tab and the negative electrode tab are bent and attached to the upper surface and the lower surface of the electrode isolation assembly;
the negative pole utmost point ear and lower casing middle part welded connection, upper cover and lower casing material are stainless steel.
2. The electrode structure of a wound electrode battery according to claim 1, wherein insulating patches are attached to the inner surfaces of the positive electrode tab and the negative electrode tab.
3. The electrode structure of a wound electrode battery as claimed in claim 1 or 2, wherein the end of the positive electrode tab extending out is punched, and the nickel plate and the peripheral side of the positive electrode tab have welding spots.
4. The electrode structure of a wound electrode battery as claimed in claim 1, wherein the lower case is fastened at its upper edge with an explosion-proof cover, the upper cover is provided at an outer peripheral portion of the explosion-proof cover and the upper cover is press-riveted to the lower case at its peripheral side.
5. A wound electrode battery electrode structure as claimed in claim 4, in which the explosion-proof cover material is rubber or plastics.
6. The electrode structure of a wound electrode battery according to claim 4, wherein the bent portions of the positive and negative electrode tabs have arc-shaped notches at both sides thereof.
7. The wound electrode battery electrode structure according to claim 4, wherein the nickel plate is flush with the upper end of the positive electrode tab.
8. The wound electrode battery electrode structure of claim 7, wherein the positive tab and the nickel plate are laser welded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921374352.8U CN210110948U (en) | 2019-08-23 | 2019-08-23 | Electrode structure of winding electrode battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921374352.8U CN210110948U (en) | 2019-08-23 | 2019-08-23 | Electrode structure of winding electrode battery |
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| Publication Number | Publication Date |
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| CN210110948U true CN210110948U (en) | 2020-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921374352.8U Active CN210110948U (en) | 2019-08-23 | 2019-08-23 | Electrode structure of winding electrode battery |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112510303A (en) * | 2020-12-02 | 2021-03-16 | 新余赣锋电子有限公司 | Button cell and electrode assembly connecting method thereof |
| CN112736335A (en) * | 2021-01-12 | 2021-04-30 | 广东维都利新能源有限公司 | Positive electrode shell cover, negative electrode shell cover and lithium battery adopting composite material |
-
2019
- 2019-08-23 CN CN201921374352.8U patent/CN210110948U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112510303A (en) * | 2020-12-02 | 2021-03-16 | 新余赣锋电子有限公司 | Button cell and electrode assembly connecting method thereof |
| CN112510303B (en) * | 2020-12-02 | 2023-03-17 | 新余赣锋电子有限公司 | Button cell and electrode assembly connecting method thereof |
| CN112736335A (en) * | 2021-01-12 | 2021-04-30 | 广东维都利新能源有限公司 | Positive electrode shell cover, negative electrode shell cover and lithium battery adopting composite material |
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Address after: No. 198, line 319, Jingcheng Town, Nanjing County, Zhangzhou City, Fujian Province Patentee after: Zhangzhou Wanbao Energy Technology Co., Ltd Address before: 363601 Nanjing high tech Industrial Park, Nanjing County, Zhangzhou City, Fujian Province Patentee before: ZHANGZHOU WANBAO ENERGY TECHNOLOGY Co.,Ltd. |