CN209929401U

CN209929401U - Utmost point ear and lithium ion battery with dysmorphism utmost point ear is glued

Info

Publication number: CN209929401U
Application number: CN201921162388.XU
Authority: CN
Inventors: 黄运兴
Original assignee: Dongguan City Hengyuan New Materials Co Ltd
Current assignee: Dongguan City Hengyuan New Materials Co Ltd
Priority date: 2019-07-23
Filing date: 2019-07-23
Publication date: 2020-01-10
Anticipated expiration: 2029-07-23

Abstract

The utility model belongs to the technical field of the battery, especially, relate to a utmost point ear with dysmorphism utmost point ear is glued, including strap and symmetry set up in the dysmorphism utmost point ear on strap two surfaces is glued, dysmorphism utmost point ear is glued including integrated into one piece's first colloid portion and second colloid portion, the length of first colloid portion is greater than the length of second colloid portion, first colloid portion with form at least one breach between the second colloid portion. Additionally, the utility model discloses still relate to one kind and include the utility model discloses a lithium ion battery of utmost point ear. Compared with the prior art, the utility model discloses a utmost point ear is satisfying under the condition of limit design, and its special-shaped utmost point ear glue in the partial side seal technology that does not participate in the battery of dew, be favorable to improving the encapsulation reliability and the security of electric core.

Description

Utmost point ear and lithium ion battery with dysmorphism utmost point ear is glued

Technical Field

The utility model belongs to the technical field of the battery, especially, relate to a utmost point ear and lithium ion battery with dysmorphism utmost point ear is glued.

Background

Soft-package lithium ion batteries have been widely applied to digital/power cells, and have advantages in energy density and customizability compared with steel-aluminum shell cells, but the safety and reliability of the soft-package lithium ion batteries are concerned by the industry.

The technology adopted by the soft package lithium ion battery industry at present is that a positive plate, a diaphragm and a negative plate are sequentially wound or superposed to form a battery cell, a positive pole tab is led out of the positive plate, and a negative pole tab is led out of the negative plate; then wrapping the battery cell in the aluminum-plastic composite film, carrying out top sealing and side sealing processes, and finally inwards folding the side sealing edge to form the soft package lithium ion battery.

The tab is generally composed of a metal band and tabs symmetrically attached to two surfaces of the metal band, and tab glue mainly plays an insulating role to prevent the metal band from directly contacting with an aluminum plastic film to form a short circuit. The existing tab glue is generally regular and square, and is generally divided into three areas, namely an exposed area, a packaging area and an inner exposed area, wherein the exposed area is exposed outside the aluminum-plastic film, the packaging area participates in top sealing of the aluminum-plastic film, and the inner exposed area is positioned in the aluminum-plastic film. However, under the condition of satisfying the limit design, the utmost point ear need be as far as possible toward being close to the position setting of electricity core edge promptly, and at this moment, interior dew district utmost point ear glue can participate in the side seal of plastic-aluminum membrane for side seal hardness grow, when the inside hem of side seal was handled, the dog-ear that it formed can lead to the fact the extrusion to rolling up the core, causes the battery to have certain safe risk.

SUMMERY OF THE UTILITY MODEL

One of the purposes of the utility model lies in: aiming at the defects of the prior art, the utility model provides a tab with special-shaped tab glue, under the condition of satisfying the limit design, the exposed part in the special-shaped tab glue does not participate in the side sealing process of the battery, thereby avoiding the folded angle from extruding the roll core and improving the safety of the battery core.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a utmost point ear with dysmorphism utmost point ear is glued, includes strap and symmetry set up in the dysmorphism utmost point ear of strap two surfaces is glued, dysmorphism utmost point ear is glued including integrated into one piece's first colloid portion and second colloid portion, the length of first colloid portion is greater than the length of second colloid portion, first colloid portion with form at least one breach between the second colloid portion.

As an improvement of utmost point ear with dysmorphism utmost point ear glue, work as when the quantity of breach is one, first colloid portion with both have a tip to align the setting for the second colloid portion. When breach quantity is one, only need with the position correspondence setting of breach in the side seal correspond the position can, can solve the big, dog-ear extrusion electric core's of side seal hardness that traditional utmost point ear glue leads to problem equally.

As an improvement of utmost point ear with dysmorphism utmost point ear glue, work as when the quantity of breach is two, first colloid portion with the center between them of second colloid portion is located same straight line. When breach quantity sets up to two, no matter which breach corresponds and sets up and correspond the position at the side seal and all can solve the problem that traditional utmost point ear glue leads to the side seal hardness big, dog-ear extrusion electric core.

As an improvement of utmost point ear with dysmorphism utmost point ear glue, first gluey somatic part with the transition junction department of second gluey somatic part is provided with the radius angle structure.

As an improvement of the electrode lug with the special-shaped electrode lug glue, the metal belt comprises any one of a nickel belt, an aluminum belt, a copper belt and an aluminum-to-nickel belt. The utility model discloses a dysmorphism utmost point ear glue is applicable to any utmost point ear, including but not limited to nickel strap, aluminium strip, copper strips and aluminium change nickel strap.

Another object of the invention is: the utility model provides a lithium ion battery, includes electric core and packaging bag, an anodal utmost point ear and a negative pole utmost point ear have been drawn forth to the electric core, the packaging bag is formed with top banding and side banding, anodal utmost point ear with negative pole utmost point ear is arbitrary section in the foreland the utmost point ear that has special-shaped utmost point ear and glue.

As a lithium ion battery's an improvement in anodal utmost point ear, the partly of first colloid portion is located the top banding outside, another part of first colloid portion encapsulate in the top banding, the second colloid portion is located inside the encapsulation bag, arbitrary one the breach correspondence set up in side banding position.

As a lithium ion battery's an improvement in the negative pole utmost point ear, the partly of first colloid portion is located the top banding outside, another part of first colloid portion encapsulate in the top banding, the second colloid portion is located inside the encapsulation bag, arbitrary one the breach correspondence set up in side banding position.

Compared with the prior art, the beneficial effects of the utility model reside in that:

1) the utility model discloses a utmost point ear has special-shaped utmost point ear to glue, and special-shaped utmost point ear glues and comprises the first colloidal part that length is longer and the second colloidal part that length is shorter, and is formed with a breach between the two, therefore, under the condition that satisfies the limit design, partly of first colloidal part participates in the top seal process, and the other part of first colloidal part exposes, and second colloidal part then exposes and does not participate in the side seal process to solve traditional utmost point ear glue and increase the problem that side seal limit hardness and dog-ear extruded electric core because of participating in the side seal;

2) the utility model discloses a lithium ion battery has used the utility model discloses a utmost point ear with dysmorphism utmost point ear is glued as anodal utmost point ear and negative pole utmost point ear, and anodal utmost point ear and negative pole utmost point ear can not only be close to the edge setting of electric core as far as, and utmost point ear glue on the utmost point ear can not influence the side seal and the hem technology of battery moreover, can not cause the dog-ear to the extrusion of electric core, has improved the encapsulation reliability of battery, reduces the potential safety hazard of battery.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.

Fig. 2 is a schematic structural diagram of embodiment 2 of the present invention.

Fig. 3 is a schematic structural diagram of embodiment 3 of the present invention.

Fig. 4 is a schematic structural diagram of embodiment 4 of the present invention.

Fig. 5 is a schematic structural diagram of embodiment 5 of the present invention.

Fig. 6 is a schematic structural diagram of embodiment 6 of the present invention.

Wherein: 1-metal band, 2-special-shaped tab glue, 3-electric core, 4-packaging bag, 5-anode tab, 6-cathode tab, 21-first glue body part, 22-second glue body part, 23-notch, 24-fillet structure, 41-top edge sealing and 42-side edge sealing.

Detailed Description

As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, within which a person skilled in the art can solve the technical problem to substantially achieve the technical result.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", horizontal "and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The present invention will be described in further detail with reference to the accompanying drawings, which are not intended to limit the present invention.

Example 1

As shown in fig. 1, a tab with a special-shaped tab glue comprises a metal belt 1 and special-shaped tab glues 2 symmetrically arranged on two surfaces of the metal belt 1, wherein the special-shaped tab glue 2 comprises a first glue portion 21 and a second glue portion 22 which are integrally formed, the length of the first glue portion 21 is greater than that of the second glue portion 22, one end of each of the first glue portion 21 and the second glue portion 22 is aligned, and a gap 23 is formed between the first glue portion 21 and the second glue portion 22. The metal tape 1 includes any one of a nickel tape, an aluminum tape, a copper tape, and an aluminum-to-nickel tape.

Example 2

As shown in fig. 2, unlike embodiment 1: the transition joint of the first plastic part 21 and the second plastic part 22 of the present embodiment is provided with a rounding structure 24.

The rest is the same as embodiment 1, and the description is omitted here.

Example 3

As shown in fig. 3, a tab with a special-shaped tab adhesive comprises a metal strip 1 and special-shaped tab adhesives 2 symmetrically arranged on two surfaces of the metal strip 1, wherein the special-shaped tab adhesives 2 comprise a first adhesive part 21 and a second adhesive part 22 which are integrally formed, the length of the first adhesive part 21 is greater than that of the second adhesive part 22, the centers of the first adhesive part 21 and the second adhesive part 22 are located on the same straight line, and two gaps 23 are formed between the first adhesive part 21 and the second adhesive part 22. The metal tape 1 includes any one of a nickel tape, an aluminum tape, a copper tape, and an aluminum-to-nickel tape.

Example 4

As shown in fig. 4, unlike embodiment 1: the transition joint of the first plastic part 21 and the second plastic part 22 of the present embodiment is provided with a rounding structure 24.

The rest of the process is the same as example 1, and the description is omitted here

Example 5

As shown in fig. 5, a lithium ion battery includes a battery cell 3 and a packaging bag 4, a positive tab 5 and a negative tab 6 are led out from the battery cell 3, a top sealing edge 41 and a side sealing edge 42 are formed on the packaging bag 4, and the positive tab 5 and the negative tab 6 are tabs with the special-shaped tab glue of embodiment 1.

In the positive electrode tab 5, one part of the first colloid part is located outside the top sealed edge 41, the other part of the first colloid part is packaged in the top sealed edge 41, the second colloid part is located inside the packaging bag 4, and the notch is correspondingly arranged at the position of the side sealed edge 42.

In the negative electrode tab 6, one part of the first colloid part is located outside the top sealed edge 41, the other part of the first colloid part is packaged in the top sealed edge 41, the second colloid part is located inside the packaging bag 4, and the notch is correspondingly arranged at the position of the side sealed edge 42.

Example 6

As shown in fig. 6, unlike example 5, there are: the positive electrode tab 5 and the negative electrode tab 6 of the present embodiment are both the tabs with the special-shaped tab glue of embodiment 3.

The rest is the same as embodiment 5, and the description is omitted here.

While the foregoing description shows and describes several preferred embodiments of the invention, it is to be understood, as noted above, that the invention is not limited to the forms disclosed herein, but is not intended to be exhaustive of other embodiments, and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed above, or as otherwise known in the relevant art. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.

Claims

1. The utility model provides a utmost point ear with dysmorphism utmost point ear is glued which characterized in that: including strap and symmetry set up in the dysmorphism utmost point ear of strap two surfaces is glued, dysmorphism utmost point ear is glued including integrated into one piece's first colloidal substance portion and second colloidal substance portion, the length of first colloidal substance portion is greater than the length of second colloidal substance portion, first colloidal substance portion with form at least one breach between the second colloidal substance portion.

2. The tab with the special-shaped tab glue as claimed in claim 1, wherein: when the number of the notches is one, one end parts of the first rubber part and the second rubber part are aligned.

3. The tab with the special-shaped tab glue as claimed in claim 1, wherein: when the number of the notches is two, the centers of the first colloid part and the second colloid part are positioned on the same straight line.

4. The tab with the special-shaped tab glue as claimed in claim 1, wherein: and a fillet structure is arranged at the transition connection part of the first colloid part and the second colloid part.

5. The tab with the special-shaped tab glue as claimed in claim 1, wherein: the metal belt comprises any one of a nickel belt, an aluminum belt, a copper belt and an aluminum-to-nickel belt.

6. A lithium ion battery comprises an electric core and a packaging bag, wherein a positive pole tab and a negative pole tab are led out of the electric core, and the packaging bag is provided with a top edge sealing and a side edge sealing, and is characterized in that the positive pole tab and the negative pole tab are the tabs with the special-shaped tab glue of any one of claim 1 ~ 5.

7. The lithium ion battery of claim 6, wherein: in the positive pole lug, a part of the first colloid part is located the top sealing edge outside, the other part of the first colloid part is packaged in the top sealing edge, the second colloid part is located inside the packaging bag, any one the notch corresponds to be arranged at the side sealing edge position.

8. The lithium ion battery of claim 6, wherein: in the negative pole utmost point ear, partly the first colloid portion is located the top banding outside, another part of first colloid portion encapsulate in the top banding, the second colloid portion is located inside the encapsulation bag, arbitrary breach correspondence set up in side banding position.