CN211017139U

CN211017139U - High-capacity lithium battery cover plate

Info

Publication number: CN211017139U
Application number: CN202020078984.6U
Authority: CN
Inventors: 王文林
Original assignee: Suzhou Juhong Communication Computer Technology Co ltd
Current assignee: Suzhou Juhong Communication Computer Technology Co ltd
Priority date: 2020-01-15
Filing date: 2020-01-15
Publication date: 2020-07-14
Anticipated expiration: 2030-01-15

Abstract

The utility model provides a high capacity lithium cell apron, is including the apron main part that is equipped with two electrode through-holes, and positive clamp plate and negative pole clamp plate insulation connection respectively are on the apron main part, and lower insulating pad is connected below the apron main part, and positive connection piece and negative pole connection piece that are located lower insulating pad below penetrate respectively electric contact positive clamp plate and negative pole clamp plate in the electrode through-hole that corresponds separately, the electrode through-hole be the step through-hole that has the upper flange, the cover has positive clamp plate and negative pole clamp plate of insulating circle to arrange in respective electrode through-hole and all to have a seal ring, turns over in the upper flange of electrode through-hole and presses the insulating circle, forms no welding electrode seal structure. The utility model discloses a rational in infrastructure, the last flange enstrophe that utilizes the electrode through-hole tightly presses insulating ring, electrode clamp plate and seal ring etc. in the apron main part sealed cooperation, need not any welding, and not only assembly process simplifies, and production efficiency improves, can not have the weeping risk of breaking, and seal structure's fail safe nature improves greatly.

Description

High-capacity lithium battery cover plate

The technical field is as follows: the utility model relates to a lithium battery fitting, especially the apron of lithium cell.

Background art: the shell space of the high-capacity lithium battery needs to be effectively utilized as much as possible, and the corresponding matched cover plate can be used for designing and assembling electrode assemblies such as an electrode pressing plate, a sealing washer and an insulating ring on the cover plate, so that the occupied shell space below is reduced. The sealing structure of the electrode assembly on the cover plate is realized by a welding process and a high-strength plastic part, so that the assembly process requirement is high, the production is complicated, the sealing structure can deform and break when the working condition temperature changes violently, the leakage risk exists, and the safety and reliability are not ideal enough. Moreover, riveting and welding forms are adopted for connecting and assembling the lower insulating pad, the electrode connecting sheet and the like below the cover plate, the whole assembly is not simple and convenient enough, and the production efficiency is influenced.

The invention content is as follows: the utility model provides a to prior art not enough, the utility model provides a rational in infrastructure, sealed reliable high capacity lithium cell apron.

The utility model discloses a be equipped with the apron main part of two electrode through-holes, positive pole clamp plate and negative pole clamp plate insulating connection respectively are on the apron main part, and lower insulating pad is connected below the apron main part, and positive connection piece and negative pole connection piece that are located lower insulating pad below penetrate respectively electric contact positive pole clamp plate and negative pole clamp plate in the electrode through-hole that corresponds separately, the electrode through-hole be the step through-hole that has the upper flange, positive pole clamp plate and negative pole clamp plate arrange in respective electrode through-hole and all filled up seal ring, the periphery of positive pole clamp plate and negative pole clamp plate all overlaps separately has the insulating ring, turns over in the upper flange of electrode through-hole and presses the insulating ring that touches, forms no welding electrode seal structure.

The utility model discloses a rational in infrastructure, the last flange enstrophe that utilizes the electrode through-hole tightly presses insulating ring, electrode clamp plate and seal ring etc. and seals the cooperation in lapping the main part, need not any welding, and not only assembly process simplifies, and production efficiency improves, even when operating mode temperature changes acutely, the deformation scaling quantity of sealed cooperation structure is also very little, can not have the weeping risk of breaking, and seal structure's fail safe nature improves greatly.

The invention is further described with reference to the following figures and examples.

Description of the drawings: fig. 1 is a main schematic view of the embodiment.

Fig. 2 is a perspective exploded view of the embodiment.

Fig. 3 is an enlarged partial sectional view a-a of fig. 1.

Fig. 4 is an enlarged partial sectional view of the cover main body in a state where the upper flange is not inverted.

Fig. 5 is a schematic top view of fig. 4.

Fig. 6 is a schematic bottom view of the positive pressure plate of fig. 3.

Fig. 7 is a bottom-direction perspective view of the cap plate main body and the lower insulating pad.

Fig. 8 is an enlarged schematic view of a section B-B of fig. 1.

The specific implementation mode is as follows: as shown in fig. 1 to 4, two electrode through holes 2 are formed in the cover plate body 1, the positive electrode pressing plate 3 and the negative electrode pressing plate 4 are respectively connected to the upper surface of the cover plate body 1 in an insulated manner, the lower insulating pad 5 is connected to the lower surface of the cover plate body 1, and the positive electrode connecting piece 6 and the negative electrode connecting piece 7 located below the lower insulating pad 5 penetrate into the corresponding electrode through holes 2 to respectively electrically contact the positive electrode pressing plate 3 and the negative electrode pressing plate 4. The electrode through hole 2 is a step through hole with an upper flange 8, the positive electrode pressing plate 3 and the negative electrode pressing plate 4 are arranged in the respective electrode through hole 2 and are respectively padded with a sealing gasket 9, the peripheries of the positive electrode pressing plate 3 and the negative electrode pressing plate 4 are respectively sleeved with an insulating ring 10, and the upper flange 8 of the electrode through hole 2 is turned inwards to press the insulating ring 10, so that a welding-free electrode sealing structure is formed.

In the present embodiment, as shown in fig. 5 and 6, the lower end surface of the positive electrode pressing plate 3 or the negative electrode pressing plate 4 at the sealing position in contact with the sealing gasket 9 is provided with a corrugated dent 11, and the surface of the electrode through hole 2 at the sealing position in contact with the sealing gasket 9 is also provided with a corrugated dent 11, so as to form a sealing reinforcing structure. The existence of the corrugation indents 11 can contact the surface of the sealing gasket 9 more sufficiently and reliably, and the sealing performance is stronger.

The positive connecting piece 6 and the negative connecting piece 7 in the cover plate product are in direct electrical contact with the positive pressing plate 3 and the negative pressing plate 4 respectively, current does not need to pass through other structures, the stability of internal resistance is high, and the overcurrent capacity of the lithium battery is improved. The positive electrode pressing plate 3, the negative electrode pressing plate 4 and the corresponding insulating ring 10 can be generally set to be in a non-circular shape such as a polygon, so that the rotation stopping structure is provided, and the use reliability is better. In the embodiment, the clasping decorative ring 14 is covered on the upper side of the cover plate main body 1 and on the periphery of the upper flange 8 of the electrode through hole 2, so that a gap can be shielded, and the cover plate is attractive and dustproof.

As shown in fig. 7 and 8, a plurality of hook legs 12 are provided on the lower surface of the cover main body 1, and the lower insulating mat 5 is closely attached to the cover main body 1 through the hook legs 12. Two pairs of buckling feet 13 are arranged on the lower surface of the lower insulating pad 5, and the positive connecting sheet 6 and the negative connecting sheet 7 are connected below the lower insulating pad 5 through the corresponding buckling feet 13. The connecting structure does not need riveting and welding, and a special tool is not needed in assembly, so that the simplicity and the reliability of the assembly of the rear working section of the lithium battery cover plate are improved, and the overall assembly efficiency of the cover plate is obviously improved.

In addition, an explosion-proof mechanism 15, which is usually an explosion-proof membrane structure, is also disposed in the middle of the cover plate body 1, and a plurality of vent holes 16 are also required to be disposed at corresponding positions in the middle of the lower insulating pad 5, so that gas can pass through the vent holes when the pressure is too high.

Claims

1. The utility model provides a high capacity lithium cell apron, is including the apron main part that is equipped with two electrode through-holes, and positive clamp plate and negative pole clamp plate be insulating connection respectively on the apron main part, and lower insulating pad is connected below the apron main part, and positive connection piece and the negative pole connection piece that are located lower insulating pad below penetrate respectively electric contact positive clamp plate and negative pole clamp plate in the electrode through-hole that corresponds separately, characterized in that: the electrode through hole (2) is a step through hole with an upper flange (8), the positive electrode pressing plate (3) and the negative electrode pressing plate (4) are arranged in the respective electrode through hole (2) and are respectively padded with a sealing gasket (9), the peripheries of the positive electrode pressing plate (3) and the negative electrode pressing plate (4) are respectively sleeved with an insulating ring (10), and the upper flange (8) of the electrode through hole (2) is inwards turned to press the insulating ring (10) to form a welding-free electrode sealing structure.

2. The high capacity lithium battery cover plate as claimed in claim 1, wherein: the lower end face of the positive electrode pressing plate (3) or the negative electrode pressing plate (4) at the contact sealing position with the sealing gasket (9) is provided with a corrugated dent (11), and the surface of the electrode through hole (2) at the contact sealing position with the sealing gasket (9) is also provided with the corrugated dent (11), so that a sealing reinforcing structure is formed.

3. The high capacity lithium battery cover plate as claimed in claim 1 or 2, wherein: a plurality of hook legs (12) are arranged on the lower surface of the cover plate main body (1), and the lower insulating pad (5) is connected and tightly attached to the cover plate main body (1) through the hook legs (12); the lower surface of the lower insulating pad (5) is provided with two pairs of buckling feet (13), and the positive connecting sheet (6) and the negative connecting sheet (7) are connected below the lower insulating pad (5) through the corresponding buckling feet (13).

4. The high capacity lithium battery cover plate as claimed in claim 1 or 2, wherein: and a tightly-holding decorative ring (14) is covered on the upper part of the cover plate main body (1) and on the periphery of an upper flange (8) of the electrode through hole (2).

5. The high capacity lithium battery cover plate as claimed in claim 3, wherein: and a tightly-holding decorative ring (14) is covered on the upper part of the cover plate main body (1) and on the periphery of an upper flange (8) of the electrode through hole (2).

6. The high capacity lithium battery cover plate as claimed in claim 1 or 2, wherein: an explosion-proof mechanism (15) is further arranged in the middle of the cover plate main body (1), and a plurality of vent holes (16) are formed in the middle of the lower insulating pad (5) at corresponding positions.

7. The high capacity lithium battery cover plate as claimed in claim 3, wherein: an explosion-proof mechanism (15) is further arranged in the middle of the cover plate main body (1), and a plurality of vent holes (16) are formed in the middle of the lower insulating pad (5) at corresponding positions.