CN210628401U

CN210628401U - Cylindrical lithium ion battery with multiple tabs

Info

Publication number: CN210628401U
Application number: CN201921711698.2U
Authority: CN
Inventors: 李孟怀; 冯凯; 管胜男; 朱甜
Original assignee: Tianmu Lake Institute of Advanced Energy Storage Technologies Co Ltd
Current assignee: Tianmu Lake Institute of Advanced Energy Storage Technologies Co Ltd
Priority date: 2019-10-14
Filing date: 2019-10-14
Publication date: 2020-05-26
Anticipated expiration: 2029-10-14

Abstract

The utility model mainly relates to a battery field provides a cylindrical lithium ion battery of many utmost points ear, including cylindrical housing, roll up core, insulating pad piece, metal switching ring, drainage sheetmetal, block, it is equipped with electric core utmost point ear and places cylindrical housing in to roll up the core both ends, be equipped with the buckle on the insulating pad piece, the metal switching ring is fixed in on the insulating pad piece through the buckle, be equipped with the drainage sheetmetal on the metal switching ring, the block is connected to the drainage sheetmetal other end. The utility model discloses the unique switching mode that sets up increases small-size switching device promptly on original gasket basis, but greatly reduced battery internal resistance improves electrochemical properties such as battery circulation, multiplying power.

Description

Cylindrical lithium ion battery with multiple tabs

Technical Field

The utility model relates to a lithium ion battery technical field, concretely relates to cylindrical lithium ion battery of many utmost points ear.

Background

The cylindrical lithium ion battery is popular among people due to the advantages of good consistency, good mechanical property, high safety and the like. With the technological progress and the rapid development of lithium ion battery technology, people have higher and higher requirements on the performance of cylindrical batteries, especially on the electrochemical properties such as energy density, cycle life and the like. At present, a cylindrical lithium ion battery is sealed by combining a steel shell and a cover cap, and the structural characteristics of the cylindrical lithium ion battery determine that the lug structure of the cylindrical lithium ion battery is quite single, so that the heat of the battery cannot be rapidly transferred outwards and the impedance is high, and further the physical and chemical properties of a battery core are degraded.

The utility model discloses a utility model patent that publication number is CN206194847U discloses a cylindrical many utmost point ear battery, through set up utmost point ear at roll core edge, welds utmost point ear to the mass flow claw and carries out the drainage, and then realizes many utmost point ears from the design, but this structural scheme is complicated, maneuverability is not strong and can't realize arbitrary quantity utmost point ear drainage design, and occupation space is more, is unfavorable for the improvement of monomer electricity core energy density. The utility model discloses a utility model patent that publication number is CN207719304U discloses a core and cylindrical battery are rolled up to cylindrical battery's many utmost points ear, set up the utmost point ear of three different length on the pole piece, at first with one of them short utmost point ear welding to a long utmost point ear, then with long utmost point ear welding to another long utmost point ear on, finally with the purpose that realizes the drainage on the block of long utmost point ear welding, but this structural scheme is higher to utmost point ear position requirement, can appear being difficult to buckle or buckle the higher problem of back thickness when utmost point ear is buckled.

Disclosure of Invention

An object of the utility model is to overcome the defect among the prior art and not enough in the production process, provide a cylindrical lithium ion battery of many utmost points ear, increase metal ring mass flow device in order to improve battery electrochemical performance.

The purpose of the invention is realized by the following technical scheme:

the utility model provides a cylindrical lithium ion battery of many utmost points ear, includes cylindrical housing, rolls up core, insulating washer, metal switching ring, drainage sheetmetal, block, roll up the core and arrange cylindrical housing in and the positive terminal is equipped with rolls up a core utmost point ear, roll up core negative pole end and be connected bottom cylindrical housing through the welding, the metal switching ring is fixed in on the insulating washer through the buckle, be equipped with the drainage sheetmetal on the metal switching ring, the block is connected to the drainage sheetmetal other end.

In the above-mentioned scheme, be equipped with down utmost point ear hole on the insulating pad, metal switching ring is equipped with the last utmost point ear hole of same shape in the position that corresponds with insulating pad, roll up and weld on metal switching ring through the laser-beam welding machine after utmost point ear hole, the last utmost point ear hole under the utmost point ear hole passes in proper order to it fully contacts with metal switching ring to guarantee to roll up a core utmost point ear.

In the above scheme, the cap comprises a conductive structural member, a rubber ring and a safety structural member.

In the scheme, one end of the drainage metal sheet is connected to the metal transfer ring, and the other end of the drainage metal sheet is welded to the conductive structural part of the cover cap, so that the anode of the winding core is communicated with the outside.

In the scheme, the winding core lug is welded to the positive foil of the winding core in the battery sheet making stage; the winding core lug is an aluminum lug; the positions and the number of the winding core lugs can be set according to actual requirements.

In the above scheme, the winding core is formed by winding the positive electrode plate, the negative electrode plate and the diaphragm.

In the above scheme, insulating pad is the PET material, and lower utmost point ear hole position and size on the insulating pad are according to the position and the quantity setting of rolling up the core utmost point ear.

In the scheme, the buckles (6) are made of PET materials, and the number of the buckles is not less than four.

According to the technical scheme provided by the utility model, the utility model discloses a cylindrical lithium cell of utmost point ear through set up metal switching ring on conventional insulating gasket, welds the electrically conductive unity of formation above the metal switching ring in proper order after drawing forth through-hole on insulating gasket and the metal switching ring respectively with anodal utmost point ear, then welds the block after buckling with the switching utmost point ear on the metal switching ring to solve the unable welded problem of anodal utmost point ear, showing and having reduced the internal resistance of battery, improved battery electrochemical performance.

Drawings

Fig. 1 is a schematic structural diagram of a multi-tab cylindrical lithium ion battery of the present invention;

FIG. 2 is a schematic structural view of the metal transfer ring of the present invention;

fig. 3 is a schematic structural diagram of the insulating gasket of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantageous technical effects of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

Example 1

As shown in fig. 1, the cylindrical lithium ion battery with multiple tabs of this embodiment, including cylindrical housing 10, roll up core 11, insulating gasket 4 of PET material, metal switching ring 1, drainage sheetmetal 3, block 12, roll up core 11 and arrange cylindrical housing 10 in and the positive terminal is equipped with rolls up core tab 13, roll up core 11 negative pole end and connect in cylindrical housing 10 bottom through welded connection, roll up core tab 13 and pass insulating gasket 4 in proper order, weld on metal switching ring 1 behind the

metal switching ring

1, 3 one ends of drainage sheetmetal are connected on metal switching ring 1, the other end welds on the electrically conductive structure spare of block 12.

The insulating spacer 4 is configured as shown in fig. 2, and has a lower

pole ear hole

5 and 4 PET fasteners 6, and the metal adapter ring 1 is fixed on the insulating spacer 4 through the fasteners 6. The metal transfer ring has a structure as shown in fig. 3, and an upper tab hole 2 having the same size and a current guiding metal plate 3 having one end connected to the metal transfer ring 4 are formed at a position corresponding to the insulating spacer 4. The winding core lug 13 can be welded on the metal transfer ring 1 through laser after sequentially passing through the lower lug hole 5 and the upper lug hole 2.

Roll up core utmost point ear 13 and weld to the anodal aluminium foil of rolling up core 11 at the battery scraps of paper stage on, for aluminium utmost point ear, its position and quantity can be set for according to actual demand. The positions and the sizes of the lower pole lug hole 5 and the upper pole lug 2 are set according to the position and the number of the winding core pole lugs 13.

The foregoing detailed description is exemplary only, and is not intended to limit the invention to the particular forms disclosed. To the utility model belongs to the technical field of the ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple reasoning or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims

1. The utility model provides a cylindrical lithium ion battery of many utmost points ear which characterized in that: including cylindrical housing (10), roll up core (11), insulating pad (4), metal switching ring (1), drainage sheetmetal (3), block (12), roll up core (11) and arrange cylindrical housing (10) in and the positive terminal is equipped with rolls up core utmost point ear (13), roll up core (11) negative pole end and be connected bottom cylindrical housing (10) through the welding, metal switching ring (1) is fixed in on insulating pad (4) through buckle (6), be equipped with drainage sheetmetal (3) on metal switching ring (1), block (12) is connected to the drainage sheetmetal (3) other end.

2. The multi-tab cylindrical lithium ion battery of claim 1, wherein: be equipped with down utmost point ear hole (5) on insulating pad (4), metal switching ring (1) is equipped with last utmost point ear hole (2) of the same shape in the position that corresponds with insulating pad (4), roll up and pass down utmost point ear hole (5), go up utmost point ear hole (2) back in proper order through the welding of laser welding machine on metal switching ring (1) core utmost point ear (13) to guarantee to roll up utmost point ear (13) and metal switching ring (1) full contact.

3. The multi-tab cylindrical lithium ion battery of claim 1, wherein: the cap (12) comprises a conductive structural member, a rubber ring and a safety structural member.

4. The multi-tab cylindrical lithium ion battery of claim 3, wherein: one end of the drainage metal sheet (3) is connected to the metal transfer ring (1), and the other end of the drainage metal sheet is welded to the conductive structural member of the cover cap (12), so that the anode of the winding core (11) is communicated with the outside.

5. The multi-tab cylindrical lithium ion battery of claim 1, wherein: the winding core lug (13) is welded to the positive foil of the winding core (11) in the battery sheet making stage; the winding core lug (13) is an aluminum lug; the position and the number of the winding core lugs (13) can be set according to actual requirements.

6. The multi-tab cylindrical lithium ion battery of claim 1, wherein: the winding core (11) is formed by winding a positive electrode plate, a negative electrode plate and a diaphragm.

7. The multi-tab cylindrical lithium ion battery of claim 2, wherein: the insulating gasket (4) is made of PET material; and the position and the size of the lower pole ear hole (5) on the insulating gasket (4) are set according to the position and the number of the winding core pole ears (13).

8. The multi-tab cylindrical lithium ion battery of claim 1, wherein: the buckle (6) is made of PET material; the number of the buckles (6) is not less than 4.