CN210576261U

CN210576261U - Electrode lug structure of winding electrode battery

Info

Publication number: CN210576261U
Application number: CN201921374345.8U
Authority: CN
Inventors: 刘双飞; 吴建平; 吴永文; 吴劲贤; 周开礼; 王雁斌
Original assignee: Zhangzhou Wanbao Energy Technology Co ltd
Current assignee: Zhangzhou Wanbao Energy Technology Co., Ltd
Priority date: 2019-08-23
Filing date: 2019-08-23
Publication date: 2020-05-19
Anticipated expiration: 2029-08-23

Abstract

The utility model provides a winding electrode battery electrode lug structure, which comprises a lower shell and an upper cover, wherein the middle parts in the lower shell and the upper cover are fixed with a winding core and an electrode isolation component wound outside the winding core, the electrode isolation component comprises a strip positive electrode plate and a strip negative electrode plate, and the periphery of the electrode isolation component 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 component; 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 component; the both sides of anodal utmost point ear and negative pole utmost point ear kink have the arc and lack the groove, the utility model discloses utilize both sides can not appear arching and cause anodal utmost point ear to produce extrusion deformation when leading to upper cover and lower casing seal, on the other hand lacks the design in groove through the arc and also can provide short-circuit protection's function, and the epitheca can stimulate anodal utmost point ear and break in the department of buckling and then realize the protection that opens circuit when battery abnormal state temperature is too high appears bulging.

Description

Electrode lug structure of winding electrode battery

Technical Field

The utility model relates to a coiling electrode battery electrode utmost point ear 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, the 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, produce the fold easily at utmost point ear bending's in-process edge and lead to local extrusion to cause the battery life to shorten in the assembling process, on the other hand small-size battery volume is less also can't design safe outage device, the security performance is not good.

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 in-process edge that utmost point ear was buckled produces the fold easily and leads to local extrusion to cause the battery life to shorten in the assembling process, and on the other hand small-size battery volume is less also can't design safe power-off device, and the security performance is not good.

The utility model discloses a concrete implementation scheme is: a wound electrode battery electrode lug structure 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 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, the both sides of anodal utmost point ear and negative pole utmost point ear kink have the arc and lack the groove.

Furthermore, the positive pole tab 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 upper end surface of the positive electrode lug is connected with the lower surface of the upper cover in a welding mode.

Furthermore, the inner surfaces of the positive electrode lug and the negative electrode lug are adhered with insulating patches.

Furthermore, the upper cover and the lower shell are made of stainless steel.

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.

Compared with the prior art, the utility model discloses utilize both sides can not appear hunch-up and lead to the upper cover to cause anodal utmost point ear to produce extrusion deformation with lower casing seal, on the other hand lacks the design in groove through the arc and also can provide short-circuit protection's function, and the upper shell can stimulate anodal utmost point ear and break and then realize the realization that opens circuit and protect in the department of buckling when battery abnormal state temperature is too high and bloated. .

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 schematic view of the assembly structure of 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 4, an electrode tab structure of a wound electrode battery comprises a lower casing 10 and an upper cover 20, wherein a winding core 30 and an electrode isolation assembly 110 wound outside the winding core are fixed at the middle parts of the lower casing 10 and the upper cover 20, the electrode isolation assembly comprises 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 clamped between the positive electrode sheets and the negative electrode sheets, and the periphery of the electrode isolation assembly is provided with a positive electrode tab 40 and a negative electrode tab 50 which respectively extend towards the upper part and the lower part of the electrode isolation assembly;

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 lug 40 is welded with the lower surface of the upper cover 20;

the negative pole utmost point ear and lower casing middle part welded connection, upper cover and lower casing material are stainless steel.

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.

Anodal utmost point ear and negative pole utmost point ear kink's both sides have arc and lack groove (410, 510), the design that arc lacks groove (410, 510) can satisfy and can not appear encircleing 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, on the other hand also can provide short-circuit protection's function through the design that arc lacked the groove, the upper shell can stimulate anodal utmost point ear and break and then realize the protection of opening a circuit in the narrower 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.

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

1. A wound electrode battery electrode lug structure 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;

2. The electrode tab structure of a wound electrode battery according to claim 1, wherein the positive electrode tab is connected with a positive electrode sheet and is made of aluminum;

the negative pole tab is connected with the negative pole piece and is made of nickel;

the upper end surface of the positive electrode lug is connected with the lower surface of the upper cover in a welding mode.

3. The electrode tab structure of a wound electrode battery as claimed in claim 1, wherein insulating patches are attached to the inner surfaces of the positive and negative electrode tabs.

4. The electrode tab structure of a wound electrode battery as claimed in claim 1 or 2, wherein the material of the upper and lower cases is stainless steel.

5. The electrode tab structure of a wound electrode battery as claimed in claim 1, wherein the upper edge of the lower case is fastened with an explosion-proof cover, the upper cover is mounted on the outer circumference of the explosion-proof cover, and the upper cover is press-riveted to the circumference of the lower case.

6. The wound electrode battery electrode tab structure of claim 5, wherein the explosion-proof cover material is rubber or plastic.