CN217641558U

CN217641558U - Edgeless cylindrical battery structure

Info

Publication number: CN217641558U
Application number: CN202221665954.0U
Authority: CN
Inventors: 王思凡; 程可文; 程智林
Original assignee: Shenzhen Juheyuan Technology Co ltd
Current assignee: Shenzhen Changhong Juheyuan Technology Co.,Ltd.
Priority date: 2022-06-29
Filing date: 2022-06-29
Publication date: 2022-10-21
Anticipated expiration: 2032-06-29

Abstract

The utility model discloses a boundless cylinder battery structure, including the combined cover that has pressure release structure, bottom (5), two end go out the core of single-pole ear or the core of many utmost points ear and as rolling up core storage container, the combination lid, casing (1) that the carrier was used is welded to the bottom, roll up core (6) and put into casing (1), the anodal utmost point ear (7) of rolling up core (6) are connected with the combination lid, the negative pole utmost point ear of rolling up core (6) is connected with bottom (5), the combination lid forms the positive pole with this, bottom (5) form the negative pole with this, the combination lid is installed in the both sides of casing (1) with bottom (5) seal; the utility model discloses the overall dimension uniformity is high, possesses higher security performance and higher capacity battery and increases customer experience and feels.

Description

Borderless cylindrical battery structure

Technical Field

The utility model relates to a battery, concretely relates to boundless cylinder battery structure.

Background

The portable electronic equipment, the electronic cigarette and the atomizer equipment are widely applied to production and life of people, and have a development trend of unifying safety performance and appearance standard of a battery and improving capacity, but for a traditional soft package cylindrical battery, when the capacity of the battery is improved to enhance the cruising ability of the battery, the diameter and the height of the soft package cylindrical battery are generally increased; when the diameter and height of a cylindrical battery are to be reduced, the capacity and endurance of the battery are generally reduced. Therefore, the conventional cylindrical battery cannot simultaneously take large capacity and small volume into consideration.

Soft packet of cylinder battery shortcoming of tradition: 1. during charging, discharging and storing processes, the electrolyte can continuously corrode the aluminum layer, so that gas is generated after the battery is stored, and fatality defects such as liquid leakage and the like are caused; 2. the soft package battery cannot completely protect the winding core only by a weak aluminum-plastic film (113 um thick), so that the contact short circuit of a positive electrode and a negative electrode caused by external extrusion inside the winding core can be caused, and fatal damage is formed; 3. the soft package battery has poor consistency of the external dimension of the battery due to difference of equipment and personnel operation methods in the manufacturing process; 4. the soft package battery has limited inner space due to the packaging process of top sealing, side sealing and two edge sealing, and the capacity cannot be further improved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a borderless cylinder battery structure has a combination cover piece that has special pressure release structure through setting up to adopt different sealing methods, its appearance size uniformity is high, possess higher security performance and higher capacity battery and increase customer experience and feel, can effectively solve not enough among the prior art.

The utility model discloses a realize through following technical scheme: a edgeless cylindrical battery structure comprises a combined cover with a pressure relief structure, a bottom cover, a winding core with single-pole lugs or multi-pole lugs at two ends, and a shell used for welding a carrier as a winding core storage container, a combined cover piece and the bottom cover, wherein the winding core is placed in the shell, a positive pole lug of the winding core is connected with the combined cover piece, a negative pole lug of the winding core is connected with the bottom cover, the combined cover piece forms a positive pole, the bottom cover forms a negative pole, and the combined cover piece and the bottom cover are hermetically arranged at two sides of the shell;

the combined cover piece comprises a fixing piece, a sealing piece and an adhesive layer, wherein the fixing piece is fixed on the shell, an opening cavity for buckling the sealing piece is formed in the fixing piece, and the protruding part of the sealing piece is buckled into the opening cavity and fixed with the fixing piece through the adhesive layer.

According to the preferable technical scheme, the fixing piece is a steel sheet with the same shape as the cross section of the shell, a sunken assembly cavity is formed in the outer side of the steel sheet, the sealing piece is an aluminum sheet, the whole sealing piece is buckled and installed in the assembly cavity, and the protruding portion of the sealing piece is buckled into the opening cavity.

As a preferable technical scheme, the adhesive layer is made of a composite adhesive material.

According to a preferable technical scheme, the composite bonding material is a PP material.

As the preferred technical scheme, the casing adopts stainless steel, and its both ends are penetrating, and the bottom adopts stainless steel, and the centre is provided with circular shape and annotates the liquid hole, and electrolyte is annotated the liquid hole and is annotated to in the casing from on the bottom.

As a preferable technical scheme, the liquid injection hole is sealed by a sealing nail.

The utility model discloses a preparation method of boundless cylinder battery structure, including following specific steps:

s1, preparing a winding core, a shell, a combined cover piece and a bottom cover, then putting the winding core into the shell, and performing laser welding on a positive pole lug of the winding core and the combined cover piece and laser welding on a negative pole lug and the bottom cover so as to form a positive pole by the combined cover piece and form a negative pole by the bottom cover;

s2, after the two ends of the shell are welded firmly, sealing the combined cover piece and the bottom cover by using laser welding;

and S3, finally, injecting electrolyte from the liquid injection hole of the bottom cover, and filling the sealing nail into the liquid injection hole of the bottom cover to finish the last sealing.

The utility model has the advantages that: 1. the utility model has the advantages that the space utilization rate is improved by 12% and the capacity is improved by 10% according to the batteries with the same specification and model;

2. compared with the traditional soft package battery manufacturing process, the manufacturing process is reduced by 30%, so that the manufacturing period is faster and the manufacturing cost is lower;

3. the borderless battery adopts customized standard accessories, high automation is easy to realize, and the advantage of product size consistency is obvious;

4. when the pressure of the combined cover piece (a novel pressure relief device) reaches a threshold value, the aluminum piece in the combined cover piece can be flushed away, so that the pressure relief protection effect is achieved;

5. adopt 0.150mm alloy, possess structural strength height, bear good mechanical loading ability, under the heavy object impact, the bearing structure is made to the casing, reduces to inside roll up the core striking, reduces to strike down, the condition that the core thermal runaway is rolled up.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic view of the internal cross section of the present invention;

FIG. 2 is an exploded view of the present invention;

FIG. 3 is an overall structure diagram of the present invention;

fig. 4 is a schematic partial cross-sectional view of the present invention.

Detailed Description

All of the features disclosed in this specification, or all of the steps of any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.

Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.

Referring to fig. 1-3, a borderless cylindrical battery structure of the present invention includes a combined cover with a pressure relief structure, a bottom cover 5, a roll core with single-pole ears or multiple-pole ears at two ends, and a case 1 as a roll core storage container, a combined cover member, a bottom cover welding carrier, wherein the roll core 6 is placed in the case 1, a positive pole ear 7 of the roll core 6 is connected with the combined cover member, a negative pole ear of the roll core 6 is connected with the bottom cover 5, the combined cover member forms a positive pole with the positive pole, the bottom cover 5 forms a negative pole with the negative pole, and the combined cover member and the bottom cover 5 are hermetically mounted at two sides of the case 1;

the combined cover piece comprises a fixing piece 2, a sealing piece 3 and an adhesive layer 11, wherein the fixing piece 2 is fixed on the shell 1, an opening cavity for buckling the sealing piece is formed in the fixing piece 2, and a protruding part of the sealing piece 3 is buckled into the opening cavity and fixed with the fixing piece 2 through the adhesive layer.

Referring to fig. 4, the fixing member 2 is a steel sheet having the same shape as the cross-section of the case 1, and the cross-section of the case is circular, so the fixing member in this embodiment is also circular, a concave assembly cavity is disposed on the outer side of the steel sheet, the sealing member 3 is an aluminum sheet, the whole sealing member 3 is buckled and mounted in the assembly cavity, the protruding portion of the sealing member 3 is buckled into the open cavity, the adhesive layer 11 is made of a composite adhesive material, the composite adhesive material in this embodiment is a polypropylene PP material, when the temperature rises to about 120 degrees during a short circuit of the battery, the composite material melts, and the aluminum cover is turned open to release pressure.

The utility model discloses an adhesive layer also can adopt other adhesives, can melt after the temperature risees to a certain extent for the sealing member is turned over, reaches the purpose of safe pressure release.

In this embodiment, casing 1 adopts stainless steel, and its both ends are penetrating, and bottom 5 adopts stainless steel, and the centre is provided with circular shape and annotates liquid hole 8, and electrolyte pours into to casing 1 from annotating liquid hole 8 on bottom 5 in, annotates liquid hole 8 and seals through a sealed nail 4, annotates the liquid hole and seals through sealed nail after annotating the liquid completion.

In this embodiment, the sealing of the sealing nail is performed by laser welding or by laser welding after the sealing of the composite material

The preparation method of the battery of the utility model is as follows:

firstly, preparing a roll core, a shell, a combined cover piece and a bottom cover, then putting the roll core into the shell, and performing laser welding on a positive pole lug of the roll core and the combined cover piece and performing laser welding on a negative pole lug and the bottom cover so as to form a positive pole on the combined cover piece and form a negative pole on the bottom cover; then after the two ends of the shell are welded firmly, the combined cover piece and the bottom cover are sealed by laser welding; and finally, injecting electrolyte from the liquid injection hole of the bottom cover, and filling the sealing nail into the liquid injection hole of the bottom cover to finish the last sealing.

The utility model has the advantages that the space utilization rate of the battery without edges is improved by 12 percent and the capacity is improved by 10 percent according to the batteries with the same specification and model; compared with the traditional soft package battery manufacturing process, the manufacturing process is reduced by 30%, so that the manufacturing period is faster and the manufacturing cost is lower; the borderless battery adopts customized standard accessories, high automation is easy to realize, and the advantage of product size consistency is obvious; when the pressure of the novel combined cover piece pressure relief device reaches a threshold value, an aluminum piece in the combined cover piece can be flushed away, so that the pressure relief protection effect is achieved; adopt 0.150mm alloy, possess structural strength height, bear good mechanical loading ability, under the heavy object impact, the bearing structure is made to the casing, reduces to inside roll up the core striking, reduces to strike down, the condition that the core thermal runaway is rolled up.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the creative work should be covered within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope defined by the claims.

Claims

1. A borderless cylindrical battery structure is characterized in that: the lithium ion battery comprises a combined cover with a pressure relief structure, a bottom cover (5), a winding core with single-pole lugs or multiple-pole lugs at two ends, and a shell (1) serving as a winding core storage container, a combined cover piece and a bottom cover for welding a carrier, wherein the winding core (6) is placed in the shell (1), a positive pole lug (7) of the winding core (6) is connected with the combined cover piece, a negative pole lug of the winding core (6) is connected with the bottom cover (5) to form a positive pole, the bottom cover (5) forms a negative pole, and the combined cover piece and the bottom cover (5) are hermetically arranged on two sides of the shell (1);

the combined cover piece comprises a fixing piece (2), a sealing piece (3) and an adhesive layer (11), wherein the fixing piece (2) is fixed on the shell (1), an opening cavity for buckling the sealing piece is formed in the fixing piece (2), and a protruding part of the sealing piece (3) is buckled into the opening cavity and fixed with the fixing piece (2) through the adhesive layer.

2. The edgeless cylindrical battery structure of claim 1, wherein: the fixing piece (2) is a steel sheet with the same shape as the cross section of the shell (1), a sunken assembly cavity is formed in the outer side of the steel sheet, the sealing piece (3) is an aluminum sheet, the whole sealing piece (3) is buckled and installed in the assembly cavity, and the protruding portion of the sealing piece (3) is buckled into the opening cavity.

3. The edgeless cylindrical battery structure of claim 1, wherein: the adhesive layer (11) is made of composite adhesive material.

4. The edgeless cylindrical battery structure of claim 3, wherein: the composite bonding material is a PP material.

5. The edgeless cylindrical battery structure of claim 1, wherein: the casing (1) is made of stainless steel, two ends of the casing are transparent, the bottom cover (5) is made of stainless steel, the middle of the bottom cover is provided with a circular liquid injection hole (8), and electrolyte is injected into the casing (1) from the liquid injection hole (8) in the bottom cover (5).

6. The edgeless cylindrical battery structure of claim 5, wherein: the liquid injection hole (8) is sealed by a sealing nail (4).