CN213936447U

CN213936447U - Prevent winding disconnected ternary lithium-ion battery pole piece

Info

Publication number: CN213936447U
Application number: CN202022761546.2U
Authority: CN
Inventors: 吴晓东
Original assignee: Suzhou Sinlion Battery Co ltd
Current assignee: Suzhou Li'an New Energy Technology Co.,Ltd.
Priority date: 2020-11-25
Filing date: 2020-11-25
Publication date: 2021-08-10
Anticipated expiration: 2030-11-25

Abstract

The utility model discloses a prevent ternary lithium battery pole piece of winding fragment relates to ternary lithium battery technical field, the utility model discloses a protection device, positive electrode device, negative pole device and reaction unit, protection device includes first welding piece and second welding piece, positive electrode device includes anodal conducting electrode, first welding piece is equipped with first circular mounting groove, anodal conducting electrode is installed in first circular mounting groove, the negative pole device includes the negative pole conducting electrode, the second welding piece is equipped with the circular mounting groove of second, the negative pole conducting electrode is installed in the circular mounting groove of second, reaction unit includes battery case, surface welding on first welding piece lower surface and the battery case. The utility model relates to a prevent twining ternary lithium-ion battery pole piece of fragment, the body of preventing twining is made for the higher material of mechanical strength, can play the support guard action to positive conductive electrode and negative pole conductive electrode, and the insulating layer is paintd and is preventing twining the external surface, can play the isolation to positive conductive electrode and negative pole conductive electrode.

Description

Prevent winding disconnected ternary lithium-ion battery pole piece

Technical Field

The utility model relates to a ternary lithium cell technical field, in particular to prevent ternary lithium battery pole piece of winding fragment.

Background

A ternary polymer lithium battery is a lithium battery of a ternary positive electrode material using nickel cobalt lithium manganate or nickel cobalt lithium aluminate as a positive electrode material, the ternary composite positive electrode material takes nickel salt, cobalt salt and manganese salt as raw materials, the proportion of nickel, cobalt and manganese in the ternary composite positive electrode material can be adjusted according to actual needs, and the battery using the ternary material as the positive electrode has high safety compared with a cobalt acid lithium battery, but the voltage is too low, so that the battery has obvious feeling of insufficient capacity when being used on a mobile phone.

The ternary lithium battery plays an important role in production and life, but the conventional ternary lithium battery has the defect that an electrode plate is easy to wind and break, and therefore the ternary lithium battery pole plate capable of preventing the winding and the breaking is provided.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at provides a prevent to twine ternary lithium-ion battery pole piece of fragment can effectively solve the problem of electrode slice easy winding fragment among the background art.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a prevent ternary lithium battery pole piece of winding fragment, includes protection device, positive electrode assembly, negative pole device and reaction unit, protection device includes first welding piece and second welding piece, positive electrode assembly includes anodal conducting terminal, first welding piece upper surface is equipped with first circular mounting groove, anodal conducting terminal installs in first circular mounting groove, negative pole device includes the negative pole conducting terminal, second welding piece upper surface is equipped with the circular mounting groove of second, the negative pole conducting terminal is installed in the circular mounting groove of second, reaction unit includes battery case, battery case is hollow structure, first welding piece lower surface and battery case upper surface welding.

Preferably, protection device still includes and prevents twining body and insulating layer, and is a plurality of prevent twining the body and being helical structure, a plurality of prevent twining the body lower extreme respectively with first welding piece upper surface and second welding piece upper surface welding, a plurality of the insulating layer is smeared respectively at the external surface of preventing twining, wherein, prevent twining the body and the number of insulating layer is two, prevents twining the main action of body and protects the electrode, and the main action of insulating layer is insulating.

Preferably, the positive electrode device further comprises a positive electrode active material, the positive electrode active material is of a plate-shaped structure, the upper end of the positive electrode active material is connected with the lower end of the positive electrode conductive electrode, the lower end of the positive electrode active material is connected with the lower surface inside the battery shell, and the positive electrode device can directly provide electric energy.

Preferably, the negative electrode device further comprises a negative electrode active material, the negative electrode active material is of a plate-shaped structure, the upper end of the negative electrode active material is connected with the lower end of the negative electrode conducting electrode, the lower end of the negative electrode active material is connected with the lower surface inside the battery shell, and the negative electrode device can directly provide electric energy.

Preferably, reaction unit still includes organic electrolyte holds chamber and diaphragm, the diaphragm is platelike structure, diaphragm surface and the inside upper surface of battery case are connected, the diaphragm lower surface is connected with the inside lower surface of battery case, the diaphragm is cut apart into two organic electrolyte and is held the chamber with battery case, and the diaphragm can carry out ion exchange.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model discloses in, through setting up anti-wind body and insulating layer, anti-wind body is made for the higher material of mechanical strength, can play the support guard action to positive conductive electrode and negative pole conductive electrode, and the insulating layer is paintd and is being prevented twining the external surface, can play the isolation to positive conductive electrode and negative pole conductive electrode, reaches the purpose of guard electrode piece.

2. The utility model discloses in, through setting up anodal active material and negative pole active material, realize depositing the electric function of battery, reach the purpose that facilitates the use.

Drawings

Fig. 1 is a schematic view of the overall structure of a ternary lithium battery pole piece for preventing winding and breaking of the present invention;

fig. 2 is a schematic view of a front view structure of a ternary lithium battery pole piece for preventing winding and breaking of the present invention;

fig. 3 is a left side view structural diagram of a ternary lithium battery pole piece for preventing winding fragments of the present invention;

fig. 4 is a schematic view of the internal cross-sectional structure at a-a in fig. 3 according to the present invention.

In the figure: 100. a protection device; 101. an anti-tangling body; 102. an insulating layer; 103. a first welding block; 104. a second welding block; 200. a positive electrode device; 201. a positive electrode active material; 202. a positive electrode conductive electrode; 300. a negative electrode device; 301. a negative electrode active material; 302. a negative conductive electrode; 400. a reaction device; 401. a battery case; 402. an organic electrolyte cavity; 403. a diaphragm.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end" 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, but do not indicate or imply that the device or element to which the reference is made must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected or 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 in specific cases to those skilled in the art.

The first embodiment is as follows:

referring to fig. 1-4, the utility model relates to a prevent winding disconnected piece ternary lithium battery pole piece, including protection device 100, positive electrode assembly 200, negative electrode assembly 300 and reaction unit 400, protection device 100 includes first welding piece 103 and second welding piece 104, positive electrode assembly 200 includes anodal conducting electrode 202, first welding piece 103 upper surface is equipped with first circular mounting groove, anodal conducting electrode 202 is installed in first circular mounting groove, negative electrode assembly 300 includes negative electrode conducting electrode 302, second welding piece 104 upper surface is equipped with the circular mounting groove of second, negative electrode conducting electrode 302 is installed in the circular mounting groove of second, reaction unit 400 includes battery case 401, battery case 401 is hollow structure, first welding piece 103 lower surface and battery case 401 upper surface welding.

Referring to fig. 1 to 4, the protection device 100 further includes an anti-winding body 101 and an insulating layer 102, the anti-winding bodies 101 are all of a spiral structure, the lower ends of the anti-winding bodies 101 are respectively welded to the upper surface of the first welding block 103 and the upper surface of the second welding block 104, the insulating layers 102 are respectively coated on the outer surface of the anti-winding body 101, the number of the anti-winding bodies 101 and the number of the insulating layers 102 are two, the anti-winding body 101 mainly functions to protect an electrode, and the insulating layer 102 mainly functions to insulate.

Referring to fig. 1 to 4, the positive electrode assembly 200 further includes a positive electrode active material 201, the positive electrode active material 201 has a plate-shaped structure, an upper end of the positive electrode active material 201 is connected to a lower end of the positive electrode conductive electrode 202, a lower end of the positive electrode active material 201 is connected to a lower surface of an interior of the battery case 401, and the positive electrode assembly 200 can directly supply electric energy.

Referring to fig. 1 to 4, the negative electrode assembly 300 further includes a negative electrode active material 301, the negative electrode active material 301 has a plate-like structure, an upper end of the negative electrode active material 301 is connected to a lower end of a negative electrode 302, a lower end of the negative electrode active material 301 is connected to a lower surface of an interior of the battery case 401, and the negative electrode assembly 300 is capable of directly supplying electric energy.

Referring to fig. 3-4, reaction apparatus 400 further includes an organic electrolyte chamber 402 and a diaphragm 403, where diaphragm 403 is a plate-shaped structure, a surface of diaphragm 403 is connected to an upper surface inside battery case 401, a lower surface of diaphragm 403 is connected to a lower surface inside battery case 401, diaphragm 403 divides battery case 401 into two organic electrolyte chambers 402, and diaphragm 403 is capable of performing ion exchange.

The utility model discloses a theory of operation does: the positive active material 201 is lithium manganate or lithium cobaltate, lithium nickel cobalt manganese material, the diaphragm 403 is a specially formed polymer film, the film has a microporous structure, lithium ions can freely pass through the film, electrons cannot pass through the film, the negative active material 301 is graphite or carbon similar to the graphite structure, the negative conductive electrode 302 is an electrolytic copper foil with the thickness of 7-15 microns, organic electrolyte in the organic electrolyte containing cavity 402 is a carbonate solvent in which lithium hexafluorophosphate is dissolved, the battery shell 401 is an aluminum shell, the anti-winding body 101 is wound on the outer surfaces of the positive conductive electrode 202 and the negative conductive electrode 302 in a spiral structure and supports and protects the positive conductive electrode and the negative conductive electrode, and the insulating layer 102 is coated on the outer surface of the anti-winding body 101 and can insulate the conductive electrode from the anti-winding body 101.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a prevent winding disconnected ternary lithium-ion battery pole piece, includes protection device (100), positive pole device (200), negative pole device (300) and reaction unit (400), its characterized in that: protection device (100) include first welding piece (103) and second welding piece (104), positive pole device (200) are including anodal conducting electrode (202), first welding piece (103) upper surface is equipped with first circular mounting groove, anodal conducting electrode (202) are installed in first circular mounting groove, negative pole device (300) are including negative pole conducting electrode (302), second welding piece (104) upper surface is equipped with the circular mounting groove of second, negative pole conducting electrode (302) are installed in the circular mounting groove of second, reaction unit (400) include battery case (401), battery case (401) are hollow structure, first welding piece (103) lower surface and battery case (401) upper surface welding.

2. The ternary lithium battery pole piece capable of preventing winding fragments as claimed in claim 1, wherein: the protection device (100) further comprises an anti-winding body (101) and an insulating layer (102), the anti-winding body (101) is of a spiral structure, the lower end of the anti-winding body (101) is welded to the upper surface of a first welding block (103) and the upper surface of a second welding block (104) respectively, and the insulating layer (102) is smeared on the outer surface of the anti-winding body (101) respectively.

3. The ternary lithium battery pole piece capable of preventing winding fragments as claimed in claim 1, wherein: the positive electrode device (200) further comprises a positive electrode active material (201), the positive electrode active material (201) is of a plate-shaped structure, the upper end of the positive electrode active material (201) is connected with the lower end of the positive electrode conductive electrode (202), and the lower end of the positive electrode active material (201) is connected with the inner lower surface of the battery shell (401).

4. The ternary lithium battery pole piece capable of preventing winding fragments as claimed in claim 1, wherein: the negative electrode device (300) further comprises a negative electrode active material (301), the negative electrode active material (301) is of a plate-shaped structure, the upper end of the negative electrode active material (301) is connected with the lower end of the negative electrode conductive electrode (302), and the lower end of the negative electrode active material (301) is connected with the inner lower surface of the battery shell (401).

5. The ternary lithium battery pole piece capable of preventing winding fragments as claimed in claim 1, wherein: the reaction device (400) further comprises an organic electrolyte containing cavity (402) and a diaphragm (403), the diaphragm (403) is of a plate-shaped structure, the surface of the diaphragm (403) is connected with the upper surface inside the battery shell (401), the lower surface of the diaphragm (403) is connected with the lower surface inside the battery shell (401), and the diaphragm (403) divides the battery shell (401) into the two organic electrolyte containing cavities (402).