CN213936466U

CN213936466U - Utmost point ear structure, laminate polymer battery and vehicle

Info

Publication number: CN213936466U
Application number: CN202021654977.2U
Authority: CN
Inventors: 邓智勇
Original assignee: Evergrande New Energy Technology Shenzhen Co Ltd
Current assignee: Evergrande New Energy Technology Shenzhen Co Ltd
Priority date: 2020-08-10
Filing date: 2020-08-10
Publication date: 2021-08-10
Anticipated expiration: 2030-08-10

Abstract

The utility model relates to the technical field of batteries, a utmost point ear structure, laminate polymer battery and vehicle are provided, utmost point ear structure, including the utmost point ear body and the overlap joint in the same terminal side first thermal resistance component of two adjacent utmost point ear bodies that two at least intervals set up. The adjacent two lug bodies are electrically connected through the first heat resistance element, namely, current flows through the first lug body, the first heat resistance element and the second lug body in sequence, so that when the charging and discharging current passing through the lug bodies is abnormal, and the temperature of the lug bodies rises suddenly, the first heat resistance element can rapidly improve the resistance until an open circuit is formed between the adjacent two lug bodies, the abnormal event is prevented from further deteriorating, the lithium ion battery is further protected, and the safety performance of the lithium ion battery is improved. And the circuit is broken for a period of time, and after the temperature of the tab body is recovered to be normal, the resistance value of the first heat resistance element is also recovered to be in an initial state, so that the circuit of the lithium ion battery is also recovered to be normal.

Description

Utmost point ear structure, laminate polymer battery and vehicle

Technical Field

The utility model relates to the technical field of batteries, especially, provide a utmost point ear structure, have this utmost point ear structure's laminate polymer battery and have this laminate polymer battery's vehicle.

Background

The lithium ion battery has the advantages of high voltage, high specific energy, more recycling times, long storage time, good safety performance and the like, is widely applied to portable electronic equipment, and gradually transits to the field of new energy automobiles.

Because the energy density of the lithium ion battery is high, the danger coefficient of the lithium ion battery is larger if an accident happens in the actual use process. Besides improvement on the aspects of pole pieces, diaphragms, electrolyte and the like, the safety coefficient of the lithium ion battery can be improved in a mode of preventing the lithium ion battery from short circuit, overcharge and overdischarge, which is lacking in the traditional lithium ion battery.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a utmost point ear structure aims at solving the current lithium ion battery and can't deal with the overcharge or the safety problem that the overdischarge arouses.

In order to achieve the above object, the utility model adopts the following technical scheme: a tab structure comprises at least two tab bodies arranged at intervals and a first thermal resistance element lapped on the same end side of the two adjacent tab bodies.

The utility model has the advantages that: the utility model provides a utmost point ear structure, with each first thermal resistance component overlap joint on the same distolateral side of two adjacent utmost point ear bodies, two adjacent utmost point ear bodies realize electric connection through first thermal resistance component, the electric current flows through first utmost point ear body in proper order promptly, first thermal resistance component and second utmost point ear body, and thus, when the charging and discharging electric current through utmost point ear body is unusual, when the temperature that leads to utmost point ear body is suddenly risen, first thermal resistance component can improve the resistance rapidly and open circuit until forming between two adjacent utmost point ear bodies, prevent abnormal event further deterioration, and then protect lithium ion battery, improve its security performance. And the circuit is broken for a period of time, and after the temperature of the tab body is recovered to be normal, the resistance value of the first heat resistance element is also recovered to be in an initial state, so that the circuit of the lithium ion battery is also recovered to be normal.

In one embodiment, the tab structure further comprises a first gel covering the first heat resistance element.

By adopting the technical scheme, the first thermal resistance element is secondarily fixed and protected by the first colloid.

In one embodiment, the first glue width is greater than or equal to the width of the first heat resistance element.

By adopting the above technical scheme, each end side of the first heat resistance element exposed to the outside is covered.

In one embodiment, the first colloid includes a first sub-portion covering a top end side of the first heat-resistance element and a second sub-portion extending outward from the first sub-portion, the second sub-portion covering a circumferential end side of the first heat-resistance element.

By adopting the technical scheme, the covering range of each sub-part of the first colloid is determined, and the corresponding covering thickness is convenient to adjust, namely the first sub-part covers the top end side of the first heat resistance element, and the second sub-part covers the circumferential end side of the first heat resistance element.

In one embodiment, the tab structure further includes a second heat-resistance element overlapping the other end sides of the adjacent two tab bodies and corresponding to the first heat-resistance element.

Through adopting above-mentioned technical scheme, further increase the current circulation density between two adjacent utmost point ear bodies.

In one embodiment, the tab structure further comprises a second gel covering the second heat resistance element.

By adopting the technical scheme, the second thermal resistance element is secondarily fixed and protected by the second colloid.

In one embodiment, the second glue width is greater than or equal to the width of the second heat resistance element.

By adopting the above technical scheme, each end side of the second heat resistance element exposed to the outside is covered.

In one embodiment, the tab structure further comprises a third heat-resistance element, and two opposite ends of the third heat-resistance element are respectively connected with the corresponding tab bodies.

The utility model also provides a laminate polymer battery, including foretell utmost point ear structure.

The utility model has the advantages that: the utility model provides a laminate polymer battery, on the basis that has above-mentioned utmost point ear structure, when laminate polymer battery is when the unusual charge-discharge of appearance, can in time be blocked the disconnection, avoid unusual further worsening, improve laminate polymer battery's security, simultaneously, can ensure again that laminate polymer battery resumes normal work after the unusual end.

The utility model also provides a vehicle, including foretell laminate polymer battery.

The utility model has the advantages that: the utility model provides a vehicle, on the basis that has above-mentioned laminate polymer battery, the security is higher.

Drawings

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

Fig. 1 is a cross-sectional view of a tab structure provided in an embodiment of the present invention;

fig. 2 is another cross-sectional view of a tab structure provided in an embodiment of the present invention;

fig. 3 is a further cross-sectional view of a tab structure provided in an embodiment of the present invention;

fig. 4 is a further cross-sectional view of a tab structure according to an embodiment of the present invention.

Wherein, in the figures, the respective reference numerals:

the tab structure 100, the tab body 10, the first heat-resistance element 21, the first colloid 30, the first sub-portion 31, the second sub-portion 32, the second heat-resistance element 22, the second colloid 40, and the third heat-resistance element 23.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1, a tab structure 100 provided in the present application includes at least two tab bodies 10 arranged at intervals and a first heat resistance element 21 overlapping the same end side of two adjacent tab bodies 10. Here, the first heat-resistance element 21 is made of ptc (positive Temperature coefficient), after the first heat-resistance element 21 is heated, its resistance value increases suddenly to form an open circuit between two adjacent tab bodies 10, and when the Temperature of the first heat-resistance element 21 returns to the initial state, its resistance value also returns to the initial value, the circuit between two adjacent tab bodies 10 returns to connection,

the utility model provides a utmost point ear structure 100, with each first thermal resistance component 21 overlap joint on the same side of two adjacent utmost point ear bodies 10, two adjacent utmost point ear bodies 10 realize electric connection through first thermal resistance component 21, the electric current flows through first utmost point ear body 10 in proper order promptly, first thermal resistance component 21 and second utmost point ear body 10, thus, when the charge-discharge current through utmost point ear body 10 is unusual, the temperature that leads to utmost point ear body 10 is when suddenly rising, first thermal resistance component 21 can improve the resistance rapidly and open circuit until forming between two adjacent utmost point ear bodies 10, prevent unusual incident further to worsen, and then protect lithium ion battery, improve its security performance. And, after the circuit is broken for a period of time and the temperature of the tab body 10 is recovered to normal, the resistance value of the first heat resistance element 21 is also recovered to the initial state, so that the circuit of the lithium ion battery is also recovered to normal.

Referring to fig. 2, in one embodiment, the tab structure 100 further includes a first adhesive 30 covering the first heat-resisting element 21. It is to be understood that the first glue 30 is a material such as resin, and is used to encapsulate, secondarily fix, and protect the first heat-resistant element 21.

Referring to fig. 2, in one embodiment, the width of the first encapsulant 30 is greater than or equal to the width of the first thermal resistance element 21. By adopting the above-described technical solution, each end side of the first heat-resistance element 21 exposed to the outside is covered.

With continued reference to fig. 2, the first colloid 30 includes a first sub-portion 31 covering the top end side of the first heat-resisting element 21 and a second sub-portion 32 extending outward from the first sub-portion 31, and the second sub-portion 32 covers the circumferential end side of the first heat-resisting element 21. By adopting the above technical solution, the coverage of each sub-portion of the first colloid 30 is defined, and the corresponding coverage thickness is conveniently adjusted, that is, the first sub-portion 31 covers the top end side of the first heat-resistance element 21, and the second sub-portion 32 covers the circumferential end side of the first heat-resistance element 21.

Referring to fig. 3, in one embodiment, the tab structure 100 further includes a second heat-resistant element 22, and the second heat-resistant element 22 is overlapped on the other end side of two adjacent tab bodies 10 and corresponds to the first heat-resistant element 21. Here, the material and the function of the second heat resistance element 22 are the same as those of the first heat resistance element 21, and it can be understood that the current flowing density between two adjacent tab bodies 10 can be further increased by additionally arranging the second heat resistance element 22, that is, the two adjacent tab bodies 10 are electrically connected through the first heat resistance element 21 and the second heat resistance element 22.

Referring to fig. 3, in one embodiment, the tab structure 100 further includes a second glue 40 covering the second heat-resistance element 22. By adopting the above technical solution, the second thermal resistance element 22 is secondarily fixed and protected by the second colloid 40.

With continued reference to fig. 3, in one embodiment, the second glue 40 has a width greater than or equal to the width of the second thermal resistance element 22. By adopting the above-described technical solution, each end side of the second heat-resistance element 22 exposed to the outside is covered.

Referring to fig. 4, in an embodiment, the tab structure 100 further includes a third heat-resistant element 23, and opposite ends of the third heat-resistant element 23 are respectively connected to the corresponding tab bodies 10. Here, the material and the function of the third heat-resistance element 23 are the same as those of the first heat-resistance element 21. It can be understood that the current flowing density between two adjacent tab bodies 10 can be further increased by adding the third heat-resistant element 23, that is, the two adjacent tab bodies 10 are electrically connected through the first heat-resistant element 21 and the third heat-resistant element 23, or the two adjacent tab bodies 10 are electrically connected through the first heat-resistant element 21, the second heat-resistant element 22 and the third heat-resistant element 23.

The utility model also provides a laminate polymer battery, including foretell utmost point ear structure 100.

The utility model provides a laminate polymer battery, on having the basis of above-mentioned utmost point ear structure 100, when laminate polymer battery is when the unusual charge-discharge of appearance, can in time be blocked the disconnection, avoid unusual further worsening, improve laminate polymer battery's security, simultaneously, can ensure again that laminate polymer battery resumes normal work after the unusual end.

The utility model provides a vehicle, on the basis that has above-mentioned laminate polymer battery, the security is higher.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A utmost point ear structure which characterized in that: including the utmost point ear body that two at least intervals set up and overlap joint in adjacent two the first thermal resistance component of the same distolateral of utmost point ear body, utmost point ear structure still including cover in the first colloid of first thermal resistance component, first colloid including cover in the first sub-part of the top end side of first thermal resistance component and by the outside second sub-part that extends of first sub-part, the second sub-part cover in the circumference distolateral side of first thermal resistance component.

2. A tab structure as claimed in claim 1, wherein: the width of the first colloid is larger than or equal to that of the first heat resistance element.

3. A tab structure as claimed in claim 1, wherein: the tab structure further comprises a second heat resistance element, and the second heat resistance element is lapped on the other end side of the two adjacent tab bodies and corresponds to the first heat resistance element.

4. A tab structure as claimed in claim 3, wherein: the tab structure further comprises a second colloid covering the second heat resistance element.

5. The tab structure as claimed in claim 4, wherein: the width of the second colloid is greater than or equal to the width of the second heat resistance element.

6. A tab structure as claimed in claim 1 or 3, wherein: the tab structure further comprises a third thermal resistance element, and two opposite ends of the third thermal resistance element are respectively connected with the corresponding tab bodies.

7. The utility model provides a laminate polymer battery which characterized in that: including a tab structure as claimed in any one of claims 1 to 6.

8. A vehicle, characterized in that: comprising the pouch battery according to claim 7.