CN219286446U

CN219286446U - Pole piece and pole lug structure of cylindrical lithium ion battery

Info

Publication number: CN219286446U
Application number: CN202223458498.5U
Authority: CN
Inventors: 梁田田
Original assignee: Shenzhen Zhuonao New Material Co ltd
Current assignee: Shenzhen Zhuonao New Material Co ltd
Priority date: 2022-12-23
Filing date: 2022-12-23
Publication date: 2023-06-30
Anticipated expiration: 2032-12-23

Abstract

The utility model belongs to the technical field of lithium ion batteries, and discloses a pole piece and pole lug structure of a cylindrical lithium ion battery, which comprises a positive pole piece arranged in a lithium battery shell, wherein a protection component is arranged on the inner side of the positive pole piece, and connecting components are arranged at the bottoms of a first negative pole lug, a second negative pole lug and a third negative pole lug; the first positive electrode tab, the second positive electrode tab and the third positive electrode tab are arranged, and the first positive electrode tab, the second positive electrode tab and the third positive electrode tab are arranged on the positive electrode plate at equal intervals, and the first negative electrode tab, the second negative electrode tab and the third negative electrode tab which are also arranged on the negative electrode plate at equal intervals are arranged on the negative electrode plate, so that electrons move on the positive electrode plate or on the negative electrode plate and preferentially move on the electrode plate closest to the electrons, excessive energy consumption is not generated, and the performance of the battery can be improved.

Description

Pole piece and pole lug structure of cylindrical lithium ion battery

Technical Field

The utility model belongs to the technical field of lithium ion batteries, and particularly relates to a pole piece and pole lug structure of a cylindrical lithium ion battery.

Background

Lithium ion batteries are secondary batteries that operate primarily by means of lithium ions moving between a positive electrode and a negative electrode, li+ being inserted and extracted back and forth between the two electrodes during charge and discharge: during charging, li+ is deintercalated from the positive electrode, and is inserted into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; the opposite is true when discharging.

The inside of traditional cylindrical battery is generally by positive plate, negative plate and diaphragm three coiling formation, current battery generally all draws forth a conducting strip as anodal ear and negative plate respectively from anodal plate and negative plate, at the positive and negative pole of coiling formation battery, can lead to some electrons that are far away from the utmost point ear like this when removing to the utmost point ear, can produce a large amount of energy consumption, and one side of current battery negative plate lug is directly connected with the bottom of lithium cell shell, area of contact is too big, the electron on the pole piece can remove to the lithium cell shell at the in-process of circular telegram, thereby can reduce the live time of the inside electric quantity of battery.

Disclosure of Invention

The utility model aims to provide a pole piece and pole ear structure of a cylindrical lithium ion battery, which solves the problems that when electrons far from the existing device move to the pole ear, energy consumption is generated in the moving process, one side of the existing battery cathode ear is directly connected with the bottom of a lithium battery shell, the contact area is overlarge, and the electric quantity in the battery is reduced in the long-time power-on process.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a cylinder lithium ion battery pole piece utmost point ear structure, is including being located lithium battery housing internally mounted's positive pole piece, third positive pole ear, first positive pole ear and second positive pole ear are installed respectively to the equidistance from a left side to the right on the positive pole piece, protection component is installed to the inboard of positive pole piece, the negative pole piece is installed to protection component's inboard, first negative pole ear, second negative pole ear and third negative pole ear are installed respectively to the bottom of negative pole piece from a left side to the right equidistance, coupling assembling is installed to the bottom of first negative pole ear, second negative pole ear and third negative pole ear.

Preferably, the inside of lithium cell shell and be located the below of coupling assembling and have placed insulating gasket, the through-hole has been seted up on the insulating gasket, coupling assembling is located the inside and coupling assembling's of through-hole one end butt on lithium cell shell.

Preferably, one ends of the first positive electrode tab, the second positive electrode tab and the third positive electrode tab are welded with connecting pieces, and positive electrode connecting blocks are mounted at the tops of the connecting pieces.

Preferably, the connecting assembly comprises a connecting sheet, one end of the connecting sheet is connected with the first negative electrode tab, the second negative electrode tab and the third negative electrode tab, and the other end of the connecting sheet is provided with a negative electrode connecting block.

Preferably, the protective assembly includes a separator positioned between the positive and negative electrode sheets.

Preferably, a cap is mounted on the top of the lithium battery shell, and the positive connecting block is welded on the bottom of the cap.

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

(1) The first positive electrode tab, the second positive electrode tab and the third positive electrode tab are arranged, and the first positive electrode tab, the second positive electrode tab and the third positive electrode tab are arranged on the positive electrode plate at equal intervals, and the first negative electrode tab, the second negative electrode tab and the third negative electrode tab which are also arranged on the negative electrode plate at equal intervals are arranged on the negative electrode plate, so that electrons move on the positive electrode plate or on the negative electrode plate and preferentially move on the electrode plate closest to the electrons, excessive energy consumption is not generated, and the performance of the battery can be improved.

(2) The utility model is provided with the insulating gasket, the through hole and the negative connecting block, when the battery is installed, the insulating gasket is firstly placed in the lithium battery shell, then the battery is placed on the insulating gasket, and one end of the negative connecting block at one side of the battery is abutted against the lower end in the lithium battery shell, so that the contact surface of the negative electrode pole piece and the lithium battery shell can be reduced, the energy consumption can be reduced, and the service time of the electric quantity in the battery can be prolonged.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a cross-sectional view of the present utility model;

FIG. 3 is an expanded view of the positive electrode sheet of the present utility model;

FIG. 4 is an enlarged view of A in FIG. 1;

in the figure: 1. a lithium battery case; 2. capping; 3. a connecting sheet; 4. an anode connecting block; 5. a first positive electrode tab; 6. a positive electrode sheet; 7. a second positive electrode tab; 8. a third positive electrode tab; 9. an insulating spacer; 10. a negative electrode plate; 11. a diaphragm; 12. a first negative electrode tab; 13. a negative electrode connecting block; 14. a second negative electrode tab; 15. a third negative electrode tab; 16. and a through hole.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-4, the present utility model provides the following technical solutions: the utility model provides a cylinder lithium ion battery pole piece tab structure, including being located the positive pole piece 6 of 1 internally mounted of lithium battery, install third positive pole tab 8 respectively from left to right equidistance on the positive pole piece 6, first positive pole tab 5 and second positive pole tab 7, protection component is installed to the inboard of positive pole piece 6, the negative pole piece 10 is installed to the inboard of protection component, first negative pole tab 12 is installed respectively from left to right equidistance to the bottom of negative pole piece 10, second negative pole tab 14 and third negative pole tab 15, coupling assembling is installed to the bottom of first negative pole tab 12, second negative pole tab 14 and third negative pole tab 15, through setting up equidistant first positive pole tab 5 on positive pole piece 6, second positive pole tab 7 and third positive pole tab 8, can effectually reduce the travel distance of electron, thereby reduce the energy consumption of electron, set up first negative pole tab 12 equally at negative pole piece 10, second negative pole tab 14 and third negative pole tab 15 are also in order to reduce the consumption of inside energy.

Further, insulating gasket 9 has been placed to the inside of lithium cell shell 1 and be located coupling assembling's below, has seted up through-hole 16 on the insulating gasket 9, coupling assembling is located the inside and coupling assembling's of through-hole 16 one end butt on lithium cell shell 1, can not let the bottom of pole piece and lithium cell shell 1 contact through setting up insulating gasket 9 to the electron on the pole piece just can not all remove on the lithium cell shell 1, thereby reaches energy-conserving effect, and sets up through-hole 16 in order to let coupling assembling be connected with lithium cell shell 1, thereby forms a return circuit.

Still further, the connection piece 3 is welded at one end of the first positive electrode tab 5, the second positive electrode tab 7 and the third positive electrode tab 8, the positive connection block 4 is installed at the top of the connection piece 3, electrons on the positive electrode plate 6 move along the first positive electrode tab 5, the second positive electrode tab 7 and the third positive electrode tab 8, then are all concentrated on the connection piece 3, and finally move to the positive connection block 4.

Specifically, the coupling assembling includes connection piece 3, and the one end of connection piece 3 links to each other with first negative pole tab 12, second negative pole tab 14 and third negative pole tab 15, and negative connecting block 13 is installed to the other end of connection piece 3, and the electron on the negative pole piece 10 can remove along first negative pole tab 12, second negative pole tab 14 and third negative pole tab 15, then all remove on the negative connecting block 13 through connection piece 3.

It should be noted that the protection component includes a diaphragm 11, where the diaphragm 11 is located between the positive electrode piece 6 and the negative electrode piece 10, and the diaphragm 11 is used to prevent electrons on the positive electrode piece 6 from moving to the negative electrode piece 10, so as to play a role in protection.

Further, the top of the lithium battery shell 1 is provided with a cap 2, and the positive connection block 4 is welded at the bottom of the cap 2.

The working principle and the using flow of the utility model are as follows: when the lithium battery is used, the first positive electrode tab 5, the second positive electrode tab 7 and the third positive electrode tab 8 are equidistantly arranged on the positive electrode plate 6, the first negative electrode tab 12, the second negative electrode tab 14 and the third negative electrode tab 15 are equidistantly arranged on the negative electrode plate 10, the positive electrode tabs and the negative electrode tabs at two ends are welded on the connecting sheet 3, the positive electrode connecting block 4 and the negative electrode connecting block 13 are welded on the connecting sheet 3, so that a battery in the lithium battery shell 1 can form a passage, electricity quantity is generated, when the battery is arranged, the insulating gasket 9 is firstly arranged in the lithium battery shell 1, the battery is put on the insulating gasket 9, one end of the negative electrode connecting block 13 at one side of the battery is abutted to the bottom end in the lithium battery shell 1, and the negative electrode connecting block 13 is positioned in the through hole 16.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a cylinder lithium ion battery pole piece utmost point ear structure which characterized in that: including being located anodal pole piece (6) of lithium cell shell (1) internally mounted, third anodal utmost point ear (8), first anodal utmost point ear (5) and second anodal utmost point ear (7) are installed respectively to the equidistance from a left side to the right on anodal pole piece (6), protection component is installed to the inboard of anodal pole piece (6), negative pole piece (10) are installed to the inboard of protection component, first negative pole utmost point ear (12), second negative pole utmost point ear (14) and third negative pole utmost point ear (15) are installed respectively to the bottom of negative pole piece (10) from a left side to the right equidistance, coupling assembling is installed to the bottom of first negative pole utmost point ear (12), second negative pole utmost point ear (14) and third negative pole utmost point ear (15).

2. The cylindrical lithium ion battery pole piece lug structure according to claim 1, wherein: the lithium battery is characterized in that an insulating gasket (9) is placed inside the lithium battery shell (1) and below the connecting component, a through hole (16) is formed in the insulating gasket (9), and the connecting component is located inside the through hole (16) and one end of the connecting component is abutted to the lithium battery shell (1).

3. The cylindrical lithium ion battery pole piece lug structure according to claim 2, wherein: the positive electrode is characterized in that one ends of the first positive electrode lug (5), the second positive electrode lug (7) and the third positive electrode lug (8) are welded with connecting pieces (3), and positive electrode connecting blocks (4) are mounted at the tops of the connecting pieces (3).

4. A cylindrical lithium ion battery pole piece tab structure according to claim 3, wherein: the connecting assembly comprises a connecting sheet (3), one end of the connecting sheet (3) is connected with a first negative electrode tab (12), a second negative electrode tab (14) and a third negative electrode tab (15), and a negative electrode connecting block (13) is arranged at the other end of the connecting sheet (3).

5. The cylindrical lithium ion battery pole piece lug structure according to claim 4, wherein: the protection assembly comprises a diaphragm (11), and the diaphragm (11) is positioned between the positive pole piece (6) and the negative pole piece (10).

6. The cylindrical lithium ion battery pole piece tab structure of claim 5, wherein: the top of lithium cell shell (1) is installed block (2), anodal connecting block (4) welding is in the bottom of block (2).