CN215377637U

CN215377637U - Soft package battery core of lithium ion battery plastic-aluminum membrane

Info

Publication number: CN215377637U
Application number: CN202120873937.5U
Authority: CN
Inventors: 朱一虎; 何学祥
Original assignee: Guangdong Jiashang New Energy Technology Co ltd
Current assignee: Guangdong Jiashang New Energy Technology Co ltd
Priority date: 2021-04-26
Filing date: 2021-04-26
Publication date: 2021-12-31
Anticipated expiration: 2031-04-26

Abstract

The utility model relates to the technical field of lithium ion batteries, in particular to an aluminum plastic film soft package battery cell of a lithium ion battery, which comprises an aluminum plastic film, wherein a battery cell body is wrapped in the aluminum plastic film, a positive electrode lug and a negative electrode lug are arranged at the upper end of the battery cell body, the upper ends of the positive electrode lug and the negative electrode lug penetrate through the aluminum plastic film to the outside, a rectangular connecting nickel sheet is welded on the right side of the upper end of the positive electrode lug in a spot mode, a temperature control protector is arranged at the upper end of the surface of the positive electrode lug, one end of the temperature control protector is connected with the rectangular connecting nickel sheet, and the other end of the temperature control protector is connected with a Z-shaped nickel sheet. This lithium ion battery plastic-aluminum membrane soft-packaged electrical core can make utmost point ear and utmost point ear glue to be connected the back difficult quilt of shifting out through set up the wave joining region on utmost point ear, connects Z shape nickel piece and positive ear through the temperature control protector, when the temperature control protector detects positive ear high temperature, automatic cutout circuit, when positive ear reset temperature, the contact of temperature control protector is automatic closed, resumes normal operating condition, and then plays the effect of protection electric core and product.

Description

Soft package battery core of lithium ion battery plastic-aluminum membrane

Technical Field

The utility model relates to the technical field of lithium ion batteries, in particular to an aluminum plastic film soft package battery cell of a lithium ion battery.

Background

The polymer lithium battery is one kind of lithium ion battery, compare with liquid lithium battery, have energy density height, more miniaturization, ultra-thin, lightweight, and multiple advantages such as low cost, obtained extensive application in fields such as cell-phone, computer and unmanned aerial vehicle, the polymer lithium battery mainly comprises electric core and plastic-aluminum membrane, the too high condition of temperature can appear in the polymer lithium battery in the use, when the high temperature, the polymer lithium battery still uses, can lead to electric core and connected product to be ignited, there is the potential safety hazard, in view of this, we provide a lithium ion battery plastic-aluminum membrane soft package electricity core.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a lithium ion battery aluminum plastic film soft package battery cell, which aims to solve the problems that the polymer lithium battery in the background technology is possibly over-high in temperature in the use process, and when the polymer lithium battery is still used due to over-high temperature, the battery cell and connected products are possibly ignited, so that potential safety hazards exist.

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

the utility model provides a lithium ion battery plastic-aluminum membrane soft-packaged electrical core, includes the plastic-aluminum membrane, the plastic-aluminum membrane parcel has electric core body, electric core body includes polymer positive plate, negative pole piece and is located the barrier film between positive plate and the negative pole piece, electric core body's upper end is equipped with anodal ear and negative pole ear, the plastic-aluminum membrane is all passed to external world in the upper end of anodal ear and negative pole ear, the right side spot welding of anodal ear upper end has the rectangular connection nickel piece, the upper end on anodal ear surface is equipped with the temperature control protector, the one end of temperature control protector with the rectangular connection nickel piece is connected, the other end of temperature control protector is connected with Z shape nickel piece.

Preferably, tab glue is arranged at the joints of the positive tab and the negative tab with the aluminum plastic film.

Preferably, the length of the positive tab is smaller than that of the negative tab, a first wave-shaped connection area is arranged at the middle lower part of the positive tab, and the tab glue is wound on the outer side of the first wave-shaped connection area.

Preferably, a second wavy connection area is arranged at the position, close to the bottom, of the negative electrode tab, and the tab glue is wound on the outer side of the second wavy connection area.

Preferably, two ends of the temperature control protector are respectively connected with the rectangular connecting nickel sheet and the Z-shaped nickel sheet in a spot welding mode.

Preferably, an insulating block is bonded between the lower end of the Z-shaped nickel sheet and the upper end of the positive tab.

Compared with the prior art, the utility model has the beneficial effects that:

this lithium ion battery plastic-aluminum membrane soft-packaged electrical core, can make utmost point ear and utmost point ear glue to be connected the back difficult quilt of shifting out through set up the wave joining region on utmost point ear, improve the leakproofness and the stability of junction, connect Z shape nickel piece and anodal ear through the control by temperature change protector, make Z shape nickel piece as anodal output, when the control by temperature change protector detects anodal ear high temperature, automatic cutout circuit, thereby play the effect of accuse temperature, when anodal ear reset temperature, the contact of control by temperature change protector is automatic closed, resume normal operating condition, and then play the effect of protection electric core and product.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic diagram of a portion of the structure of the present invention;

fig. 3 is a schematic view of an assembly structure of a negative electrode tab and a tab glue in the utility model;

fig. 4 is a second partial schematic structural diagram of the present invention.

In the figure: the battery comprises an aluminum plastic film 1, a battery core body 2, a positive tab 20, a first wave-shaped connection area 200, a rectangular connection nickel sheet 201, a negative tab 21, a second wave-shaped connection area 210, a temperature control protector 3, a Z-shaped nickel sheet 4, an insulation block 5 and tab glue 6.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered 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 defined otherwise.

Referring to fig. 1-4, the present invention provides a technical solution:

the utility model provides a lithium ion battery plastic-aluminum membrane soft-packaged electrical core, including plastic-aluminum membrane 1, the parcel has electric core body 2 in the plastic-aluminum membrane 1, electric core body 2 includes the polymer positive plate, negative pole piece and be located the barrier film between positive plate and the negative pole piece, electric core body 2's upper end is equipped with positive ear 20 and negative pole ear 21, positive ear 20 and negative pole ear 21's upper end all passes plastic-aluminum membrane 1 to the external world, the right side spot welding of positive ear 20 upper end has rectangular connection nickel piece 201, the upper end on positive ear 20 surface is equipped with temperature control protector 3, the one end and the rectangular connection nickel piece 201 of temperature control protector 3 are connected, the other end of temperature control protector 3 is connected with Z shape nickel piece 4, connect Z shape nickel piece 4 and positive ear 20 through temperature control protector 3, make Z shape nickel piece 4 as anodal output, temperature control protector 3 can the temperature on the positive ear 20 of real-time detection.

In this embodiment, tab glue 6 is disposed at the joints of the positive tab 20 and the negative tab 21 with the aluminum-plastic film 1, and is used for sealing the joints of the tabs and the aluminum-plastic film 1.

Specifically, the length of the positive tab 20 is smaller than that of the negative tab 21, so that the upper end of the Z-shaped nickel sheet 4 can be flush with the upper end of the negative tab 21, the battery can be conveniently mounted, the middle lower part of the positive tab 20 is provided with the first wave-shaped connecting area 200, the tab glue 6 is wound on the outer side of the first wave-shaped connecting area 200, the stability of connection between the positive tab 20 and the tab glue 6 is improved, and the positive tab 20 is prevented from being pulled out.

Furthermore, a second wavy connection area 210 is arranged at a position, close to the bottom, of the negative electrode tab 21, and tab glue 6 is wound on the outer side of the second wavy connection area 210, so that the connection stability of the negative electrode tab 21 and the tab glue 6 is improved, and the negative electrode tab 21 is prevented from being pulled out.

Furthermore, two ends of the temperature control protector 3 are respectively connected with the rectangular connecting nickel sheet 201 and the Z-shaped nickel sheet 4 in a spot welding manner, so that the temperature control protector 3 and the rectangular connecting nickel sheet 201 and the Z-shaped nickel sheet 4 are fixed in position.

Furthermore, an insulating block 5 is bonded between the lower end of the Z-shaped nickel sheet 4 and the upper end of the positive lug 20, so that the lower end of the Z-shaped nickel sheet 4 is prevented from being accidentally contacted with the upper end of the positive lug 20, and the normal work of the temperature control protector 3 is ensured.

The lithium ion battery plastic-aluminum membrane laminate polymer core of this embodiment is when using, form the route with the circuit connection of negative pole ear 21 and Z shape nickel piece 4 respectively with the product, in the battery discharge process, the temperature variation on the positive ear 20 of temperature control protector 3 real-time detection, when detecting positive ear 20 on the high temperature, the contact of temperature control protector 3 is opened, make the circuit disconnection that battery and product formed, thereby make the battery stop discharging, avoid the temperature to rise continuously, and then play the guard action to electric core and product, when positive ear 10 reset temperature, the contact of temperature control protector 3 is closed, resume normal operating condition, make the circuit intercommunication of battery and product formation, make the product can normal use.

The foregoing shows and describes the general principles, essential features, and advantages of the utility model. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a lithium ion battery plastic-aluminum membrane soft-packaged electric core which characterized in that: including plastic-aluminum membrane (1), the parcel has electric core body (2) in plastic-aluminum membrane (1), electric core body (2) include polymer positive plate, negative pole piece and lie in the barrier film between positive plate and the negative pole piece, the upper end of electric core body (2) is equipped with positive ear (20) and negative pole ear (21), plastic-aluminum membrane (1) to external world is all passed to the upper end of positive ear (20) and negative pole ear (21), rectangular connection nickel piece (201) has been welded to the right side point of positive ear (20) upper end, the upper end on positive ear (20) surface is equipped with control by temperature change protector (3), the one end of control by temperature change protector (3) with rectangular connection nickel piece (201) are connected, the other end of control by temperature change protector (3) is connected with Z shape nickel piece (4).

2. The lithium ion battery aluminum-plastic film soft package battery cell of claim 1, characterized in that: and tab glue (6) is arranged at the joint of the positive tab (20) and the negative tab (21) and the aluminum-plastic film (1).

3. The lithium ion battery aluminum-plastic film soft package battery cell of claim 2, characterized in that: the length of positive electrode tab (20) is less than the length of negative electrode tab (21), the middle-lower part of positive electrode tab (20) is equipped with first wave connection district (200), the outside winding of first wave connection district (200) has utmost point ear gum (6).

4. The lithium ion battery aluminum-plastic film soft package battery cell of claim 2, characterized in that: and a second wavy connection area (210) is arranged at the position, close to the bottom, of the negative electrode tab (21), and the tab glue (6) is wound on the outer side of the second wavy connection area (210).

5. The lithium ion battery aluminum-plastic film soft package battery cell of claim 1, characterized in that: and two ends of the temperature control protector (3) are respectively connected with the rectangular connecting nickel sheet (201) and the Z-shaped nickel sheet (4) in a spot welding manner.

6. The lithium ion battery aluminum-plastic film soft package battery cell of claim 1, characterized in that: an insulating block (5) is bonded between the lower end of the Z-shaped nickel sheet (4) and the upper end of the positive lug (20).