CN216872124U

CN216872124U - Lithium ion battery cover plate

Info

Publication number: CN216872124U
Application number: CN202220150266.4U
Authority: CN
Inventors: 顾玲铭; 付欣欣; 葛科; 王化胜
Original assignee: Jiangsu Higee Energy Co Ltd
Current assignee: Jiangsu Higee Energy Co Ltd
Priority date: 2022-01-20
Filing date: 2022-01-20
Publication date: 2022-07-01
Anticipated expiration: 2032-01-20

Abstract

The utility model relates to a lithium ion battery cover plate, which comprises a support component and an aluminum cover plate sheet arranged on the support component, wherein the left part and the right part of the aluminum cover plate sheet are respectively provided with a positive pole column hole and a negative pole column hole, a positive pole is inserted into the positive pole column hole, the positive pole column comprises an aluminum column core, the middle part of the aluminum column core is provided with a circle of upper groove of the aluminum column core, and an anode notch is arranged between the upper groove of the aluminum column core and the positive pole column hole of the aluminum cover plate sheet; the negative pole column is inserted into the negative pole column hole, the negative pole column comprises a copper-aluminum composite column core, a circle of copper-aluminum composite column core upper groove is formed in the middle of the copper-aluminum composite column core, and a negative pole notch is formed between the copper-aluminum composite column core upper groove and the negative pole column hole of the aluminum cover plate. The utility model not only reduces the cost of processing the lower plastic part, but also reduces the working procedure of assembling the cover plate, so that the battery has more reliable sealing performance.

Description

Lithium ion battery cover plate

Technical Field

The utility model relates to the technical field of lithium ion batteries, in particular to a lithium ion battery cover plate.

Background

Compared with the traditional fossil energy, the new energy industry as a new industry has better energy-saving, environmental-friendly and renewable properties, and the new energy is believed to replace the fossil energy as the main force of the energy in the near future. At present, the lithium ion battery is considerable in development of new energy industry, and the lithium ion battery is mainly applied to power and energy storage industry. Most of the energy storage batteries are still assembled by adopting an aluminum shell, connecting sheets of the energy storage batteries can be divided into a hard connecting sheet and a soft connecting sheet, the soft connecting sheet is flexibly connected and can be bent and deformed, the supporting force is poor, the soft connecting sheet and a roll core can be separated by using a support, and short circuit is avoided. However, the cover plate of the support is usually buckled by injection molding of the lower plastic part, the traditional processing technology is more complicated, the cost is higher, and the sealing performance is not reliable during the assembly of the cover plate.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects and provide a lithium ion battery cover plate, which solves the problems of high processing cost, complex assembly process, unreliable sealing performance and the like of the traditional soft connection cover plate.

The purpose of the utility model is realized as follows:

a lithium ion battery cover plate comprises a support component and an aluminum cover plate sheet arranged on the support component, wherein a positive pole hole and a negative pole hole are respectively formed in the left part and the right part of the aluminum cover plate sheet, a positive pole is inserted into the positive pole hole, the positive pole comprises an aluminum pole core, a circle of upper aluminum pole core groove is formed in the middle of the aluminum pole core, and an anode notch is formed between the upper aluminum pole core groove and the positive pole hole of the aluminum cover plate sheet; the cathode column is inserted into the cathode column hole and comprises a copper-aluminum composite column core, a circle of copper-aluminum composite column core upper groove is formed in the middle of the copper-aluminum composite column core, and a cathode notch is formed between the copper-aluminum composite column core upper groove and the cathode column hole of the aluminum cover plate sheet;

the support assembly comprises two symmetrically clamped supports, the whole support is box-shaped, the top surface of the support is provided with two symmetrical semicircular holes, the positions of the two symmetrical semicircular holes are matched with the anode column hole and the cathode column hole, a coaxial semicircular upper boss is arranged on the periphery of the upper end surface of each semicircular hole, and the semicircular upper bosses fall into the anode notch or the cathode notch when the support is assembled, so that the support is buckled on the aluminum cover plate to realize positioning in the horizontal plane direction; the circumference of the lower end face of the semicircular hole is also provided with a coaxial semicircular annular lower boss, so that the positioning and guiding effects are achieved when the support is buckled.

Furthermore, an explosion-proof valve hole is formed in the middle of the aluminum cover plate and used for arranging an explosion-proof plate; the explosion-proof valve hole is arranged between the positive pole column hole and the negative pole column hole, and a liquid injection hole is arranged between the positive pole column hole and the explosion-proof valve hole.

Further, the upper portion cover of aluminium post core is established and is moulded on the positive pole, mould on the positive pole and be equipped with anodal welded ring between piece and the aluminium post core, anodal welded ring's lower terminal surface flushes with the lower terminal surface of aluminium cover plate piece, is anodal laser welding position between anodal welded ring and the aluminium cover plate piece, and through laser with anodal welded ring and aluminium cover plate piece welding together.

Further, the upper portion cover of the compound post core of copper aluminium establishes on the negative pole and moulds the piece, mould on the negative pole and be equipped with negative pole welded ring between the compound post core of copper aluminium, the lower terminal surface of negative pole welded ring flushes with terminal surface under the aluminium apron piece, is negative pole laser welding position between negative pole welded ring and the aluminium apron piece, and is in the same place negative pole welded ring and aluminium apron piece welding through laser.

Furthermore, the upper edge of the semicircular hole is chamfered, the lower edge of the semicircular hole is chamfered, and the semicircular ring can accurately enter the upper groove of the aluminum column core of the positive pole column or the upper groove of the copper-aluminum composite column core of the negative pole column by playing a role in guiding in the process of buckling the support.

Furtherly is equipped with the knot position of matching respectively on the block face of two supports and detains the position hole, detains the position when two support subtend locks and gets into to detain the position hole in and realize fixing.

Furthermore, two symmetrical semicircular grooves are further formed in the support, so that when the supports are oppositely buckled, the two semicircular grooves form a whole circle.

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

compared with the prior art that the support of the soft connection lithium ion battery is used, the assembly structure of the utility model not only reduces the cost of processing the lower plastic part, but also reduces the working procedure of assembling the cover plate, simplifies the cover plate, and adopts the assembly process that the welding rings of the positive and negative poles are riveted and then welded on the cover plate, thus leading the battery to have more reliable sealing performance.

Drawings

FIG. 1 is a schematic view of the present invention.

Fig. 2 is a schematic diagram of the explosive structure of the present invention.

Fig. 3 is a schematic cross-sectional view of fig. 1.

Fig. 4 is a schematic structural view of the stent of the present invention.

Fig. 5 is a schematic cross-sectional view of an aluminum cover sheet of the present invention.

Wherein:

the explosion-proof plate comprises a support 1, an explosion-proof sheet 2, an aluminum cover plate 3, an anode column hole 4, a liquid injection hole 5, an explosion-proof valve hole 6, a cathode column hole 7, an anode column 8, a cathode column 9, an anode upper plastic part 10, an anode welding ring 11, a cathode upper plastic part 12, a cathode welding ring 13, an anode laser welding position 14, an anode notch 15, an aluminum column core 16, an aluminum column core upper groove 17, a cathode notch 18, a copper-aluminum composite column core 19, a copper-aluminum composite column core upper groove 20, a cathode laser welding position 21, a semicircular upper boss 22, an upper chamfer 23, a semicircular hole 24, a semicircular groove 25, a buckling position 26, a semicircular lower boss 27, a lower chamfer 28 and a buckling position hole 29.

Detailed Description

For a better understanding of the technical aspects of the present invention, reference will now be made in detail to the accompanying drawings. It should be understood that the following specific examples are not intended to limit the embodiments of the present invention, but are merely exemplary embodiments of the present invention. It should be noted that the description of the positional relationship of the components, such as the component a is located above the component B, is based on the description of the relative positions of the components in the drawings, and is not intended to limit the actual positional relationship of the components.

Example 1:

referring to fig. 1-5, fig. 1 is a schematic diagram of a lithium ion battery cover plate. As shown in the figures, the lithium ion battery cover plate comprises a support assembly and an aluminum cover plate sheet 3 arranged on the support assembly, wherein the left part and the right part of the aluminum cover plate sheet 3 are respectively provided with a positive pole column hole 4 and a negative pole column hole 7, the middle part of the aluminum cover plate sheet 3 is provided with an explosion-proof valve hole 6 for arranging an explosion-proof sheet 2, and the explosion-proof sheet 2 is welded on the explosion-proof valve hole 6 through laser; explosion-proof valve opening 6 sets up between anodal post hole 4 and negative pole post hole 7, be equipped with between anodal post hole 4 and the explosion-proof valve opening 6 and annotate liquid hole 5.

A positive pole 8 is inserted into the positive pole hole 4, the positive pole 8 comprises an aluminum pole core 16, a positive pole upper plastic part 10 is sleeved on the upper part of the aluminum pole core 16, and a circle of aluminum pole core upper groove 17 is arranged in the middle of the aluminum pole core 16; an anode welding ring 11 is arranged between the anode upper plastic part 10 and the aluminum column core 16, the lower end face of the anode welding ring 11 is flush with the lower end face of the aluminum cover plate piece 3, an anode laser welding position 14 is arranged between the anode welding ring 11 and the aluminum cover plate piece 3, and the anode welding ring 11 and the aluminum cover plate piece 3 are welded together through laser; and a positive pole notch 15 is formed between the upper groove 17 of the aluminum column core and the positive pole column hole 4 of the aluminum cover plate 3.

A negative pole 9 is inserted into the negative pole hole 7, the negative pole 9 comprises a copper-aluminum composite pole core 19, a negative pole upper plastic part 12 is sleeved on the upper part of the copper-aluminum composite pole core 19, and a circle of copper-aluminum composite pole core upper groove 20 is formed in the middle of the copper-aluminum composite pole core 19; a cathode welding ring 13 is arranged between the cathode upper plastic part 12 and the copper-aluminum composite column core 19, the lower end face of the cathode welding ring 13 is flush with the lower end face of the aluminum cover plate sheet 3, a cathode laser welding position 21 is arranged between the cathode welding ring 13 and the aluminum cover plate sheet 3, and the cathode welding ring 13 and the aluminum cover plate sheet 3 are welded together through laser; and a negative pole notch 18 is formed between the upper groove 20 of the copper-aluminum composite column core and the negative pole column hole 7 of the aluminum cover plate sheet 3.

The support assembly comprises two symmetrically clamped supports 1, the whole support assembly is box-shaped, two symmetrical semicircular holes 24 are formed in the top surface of each support 1, the positions of the semicircular holes are matched with the positive pole column hole 4 and the negative pole column hole 7, a coaxial semicircular upper boss 22 is arranged on the upper end face of each semicircular hole 24 in a circle, and when the supports 1 are assembled, the semicircular upper bosses 22 fall into the positive pole notches 15 or the negative pole notches 18, so that the supports 1 are buckled on the aluminum cover plate pieces 3 to realize positioning in the horizontal plane direction; a coaxial semicircular annular lower boss 27 is also arranged on the periphery of the lower end face of the semicircular hole 24, so that the bracket 1 plays a role in positioning and guiding when being buckled.

The upper edge of the semicircular hole 24 is subjected to upper chamfering 23 treatment, the lower edge is subjected to lower chamfering 28 treatment, and the guide effect can be achieved in the process of buckling the support 1, so that the semicircular ring 24 can accurately enter the upper groove 17 of the aluminum column core of the positive pole 8 or the upper groove 20 of the copper-aluminum composite column core of the negative pole 9.

The clamping surfaces of the two supports 1 are respectively provided with a buckling position 26 and a buckling position hole 29 which are matched with each other, the left end of each support 1 is provided with the buckling position 26, the right end of each support 1 is provided with the buckling position hole 29, the middle of each support 1 is provided with the buckling position 26 and the buckling position hole 29, and the buckling positions 26 enter the buckling position holes 29 to be fixed when the two supports 1 are buckled oppositely.

The bracket 1 is also provided with two symmetrical semicircular grooves 25, so that when the bracket 1 is buckled oppositely, the two semicircular grooves 25 form a whole circle, and a die for buckling the bracket oppositely does not need to be opened, thereby saving the cost; the main function is to prevent the electrolyte injection hole 5 from touching the battery cell tab to form a short circuit, and prevent the battery cell tab from blocking the electrolyte injection hole 5 to form a block.

The two sides of the semicircular hole 24 on the top surface of the bracket 1 are symmetrically opened.

The working principle is as follows:

the utility model adopts a structure comprising: (1) the positive post, sealing washer, aluminium post core, holding ring are placed to the structure in by the welding ring, and the welding ring carries out the riveting and makes the sealing washer pressurized deformation highly to being greater than 30% sealing washer original height and realizes sealed, and the welding ring surface of assembly completion moulds plastics one deck polypropylene. (2) And the structural assembly form of the negative pole is consistent with that of the positive pole, and the aluminum pole core is changed into a copper-aluminum composite pole core. (3) The structure is characterized in that the positive pole column and the negative pole column are welded on the cover plate through laser welding; an explosion-proof valve is arranged in the middle. (4) The structure is buckled in the grooves on the positive pole column core and the negative pole column core in a buckling assembly mode.

The above is only a specific application example of the present invention, and the protection scope of the present invention is not limited in any way. The technical solutions formed by using equivalent transformation or equivalent substitution are all within the protection scope of the present invention.

Claims

1. A lithium ion battery cover plate is characterized in that: the aluminum cover plate comprises a support component and an aluminum cover plate sheet (3) arranged on the support component, wherein a positive pole column hole (4) and a negative pole column hole (7) are respectively formed in the left part and the right part of the aluminum cover plate sheet (3), a positive pole column (8) is inserted into the positive pole column hole (4), the positive pole column (8) comprises an aluminum column core (16), a circle of aluminum column core upper groove (17) is formed in the middle of the aluminum column core (16), and a positive pole notch (15) is formed between the aluminum column core upper groove (17) and the positive pole column hole (4) of the aluminum cover plate sheet (3); a cathode post (9) is inserted into the cathode post hole (7), the cathode post (9) comprises a copper-aluminum composite post core (19), a circle of copper-aluminum composite post core upper groove (20) is arranged in the middle of the copper-aluminum composite post core (19), and a cathode notch (18) is arranged between the copper-aluminum composite post core upper groove (20) and the cathode post hole (7) of the aluminum cover plate (3);

the support assembly comprises two symmetrically clamped supports (1), two symmetrical semicircular holes (24) are formed in the top surface of each support (1), the positions of the semicircular holes are matched with the positive pole column hole (4) and the negative pole column hole (7), coaxial semicircular upper bosses (22) are arranged on the upper end surfaces of the semicircular holes (24) in a circle, and when the supports (1) are assembled, the semicircular upper bosses (22) fall into the positive pole notches (15) or the negative pole notches (18), so that the supports (1) are buckled on the aluminum cover plate pieces (3) to realize positioning in the horizontal plane direction; the circumference of the lower end face of the semicircular hole (24) is also provided with a coaxial semicircular annular lower boss (27), so that the positioning and guiding effects are achieved when the support (1) is buckled.

2. The lithium ion battery cover plate of claim 1, wherein: the middle part of the aluminum cover plate (3) is provided with an explosion-proof valve hole (6) for arranging an explosion-proof plate (2); explosion-proof valve opening (6) set up between positive post hole (4) and negative pole post hole (7), be equipped with between positive post hole (4) and explosion-proof valve opening (6) and annotate liquid hole (5).

3. The lithium ion battery cover plate of claim 1, wherein: the upper portion cover of aluminium column core (16) is established anodically and is gone up plastic part (10), be equipped with anodal welded ring (11) between plastic part (10) and aluminium column core (16) on the positive pole, the lower terminal surface of anodal welded ring (11) flushes with aluminium cover plate piece (3) lower terminal surface, is anodal laser welding position (14) between anodal welded ring (11) and aluminium cover plate piece (3), is in the same place anodal welded ring (11) and aluminium cover plate piece (3) welding through laser.

4. The lithium ion battery cover plate of claim 1, wherein: the upper portion cover of copper aluminium composite column core (19) is established and is moulded on the negative pole (12), be equipped with negative pole welded ring (13) between mould (12) on the negative pole and the copper aluminium composite column core (19), the lower terminal surface of negative pole welded ring (13) flushes with the terminal surface under aluminium cover plate piece (3), is negative pole laser welding position (21) between negative pole welded ring (13) and aluminium cover plate piece (3), welds negative pole welded ring (13) and aluminium cover plate piece (3) together through laser.

5. The lithium ion battery cover plate of claim 1, wherein: the upper edge of the semicircular hole (24) is subjected to chamfering (23) treatment, the lower edge is subjected to chamfering (28) treatment, and the guide effect can be achieved in the process of buckling the support (1), so that the semicircular hole (24) can accurately enter the upper groove (17) of the aluminum column core of the positive pole column (8) or the upper groove (20) of the copper-aluminum composite column core of the negative pole column (9).

6. The lithium ion battery cover plate of claim 1, wherein: the clamping surfaces of the two supports (1) are respectively provided with a matched buckling position (26) and a buckling position hole (29), and the buckling positions (26) enter the buckling position holes (29) to be fixed when the two supports (1) are buckled oppositely.

7. The lithium ion battery cover plate of claim 1, wherein: the support (1) is also provided with two symmetrical semicircular grooves (25), so that the two semicircular grooves (25) form a whole circle when the support (1) is oppositely buckled.