CN216213751U

CN216213751U - Cap structure for power battery

Info

Publication number: CN216213751U
Application number: CN202122662029.4U
Authority: CN
Inventors: 尚勤忠; 潘晶晶
Original assignee: Xinxiang Xinxin Battery Co ltd
Current assignee: Xinxiang Xinxin Battery Co ltd
Priority date: 2021-11-02
Filing date: 2021-11-02
Publication date: 2022-04-05
Anticipated expiration: 2031-11-02

Abstract

The utility model belongs to the technical field of power batteries, and discloses a cap structure for a power battery, which comprises a top cap and a pore plate, wherein the top cap is arranged above the pore plate, the bottom end of the top cap is provided with an explosion-proof plate, the lower surface wall of the explosion-proof plate is provided with an explosion-proof film, the inner side wall of the pore plate is provided with a limit groove matched with the end part of the explosion-proof plate, the periphery of the pore plate is provided with an outer sealing ring, the inner side wall of the outer sealing ring is symmetrically provided with positioning grooves, and the upper end and the lower end of the outer surface wall of the pore plate are symmetrically fixed with positioning convex rods matched with the positioning grooves. Avoiding displacement due to squeezing.

Description

Cap structure for power battery

Technical Field

The utility model belongs to the technical field of power batteries, and particularly relates to a cap structure for a power battery.

Background

The power battery is a power supply for providing a power source for tools, and is a storage battery for providing power for electric automobiles, electric trains, electric bicycles and golf carts, wherein the power battery cap is a part at the top end of the power battery and is an important component in the power battery, the use safety of the power battery can be protected, each specification of the power battery cap is formed by assembling respective parts through laser spot welding and then wrapping, the power battery cap is made of aluminum materials, the stability of an explosion-proof system is further improved, when the internal pressure of the power battery reaches a specified explosion specification range, a large amount of substances in the power battery are quickly discharged outwards through a top cover pressure release hole, and the safety performance of the power battery is ensured.

But present power battery cap has certain defect at present, and traditional power battery cap does not set up effectual limit positioning structure, and the stability of explosion-proof board and outer seal ring installation is relatively poor, takes place to shift easily, and in addition, traditional power battery cap does not set up effectual buffer structure, and the cap is deformed easily after the pressurized and is damaged.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a cap structure for a power battery, which aims to solve the problems that an effective limiting and positioning structure is not arranged and the installation stability of an explosion-proof plate and an outer sealing ring is poor in the background technology, and in addition, an effective buffering structure is not arranged and the cap is easy to deform and damage after being pressed.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a block structure for power battery, includes top cap and orifice plate, the top cap is installed in the top of orifice plate, and the bottom of top cap is equipped with the explosion-proof board, the lower wall of explosion-proof board is equipped with the rupture membrane, the spacing groove with explosion-proof board end looks adaptation is seted up to the inside wall of orifice plate, the periphery of orifice plate is equipped with the outer seal ring, the constant head tank has been seted up to the inside wall symmetry of outer seal ring, the lower extreme symmetry is fixed with the location nose bar with constant head tank looks adaptation on the exterior wall of orifice plate.

Preferably, a cavity is arranged between the bottom end of the explosion-proof membrane and the pore plate, a spring is connected to the middle position inside the cavity, and the two sides of the bottom inside the cavity are symmetrically connected with the buffer plate.

Preferably, the upper surface wall of the top cover is provided with an air hole.

Preferably, the middle position of the upper surface wall of the top cover is upwards protruded to form a protruding part, and a transition cavity is formed between the protruding part and the explosion-proof plate.

Preferably, a transition tab is fixed at the bottom end of the pore plate.

Preferably, through holes are symmetrically formed in the lower surface wall of the pore plate and opposite to the transition lug.

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

(1) in addition, the positioning groove and the positioning convex rod are additionally arranged, so that the positioning convex rod can be embedded into the positioning groove when the outer sealing ring is installed, the installation stability of the outer sealing ring can be effectively ensured, and the displacement caused by extrusion is avoided.

(2) According to the utility model, by additionally arranging the cavity, the buffer plate and the spring, when the cap is pressed, the buffer plate and the spring can effectively buffer overlarge pressure, the cap is prevented from being damaged due to pressing, and the service life of the cap is prolonged.

Drawings

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

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is an enlarged view of portion B of FIG. 1;

in the figure: 1. a top cover; 2. air holes; 3. an explosion-proof plate; 4. an orifice plate; 5. an explosion-proof membrane; 6. transition tabs; 7. positioning the convex rod; 8. an outer sealing ring; 9. a cavity; 10. a buffer plate; 11. positioning a groove; 12. a limiting groove; 13. a spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides the following technical solutions: a cap structure for a power battery comprises a top cap 1 and a pore plate 4, wherein the top cap 1 is installed above the pore plate 4, the top cap 1 plays a supporting role and also serves as a positive end, a blast-proof plate 3 is arranged at the bottom end of the top cap 1, an explosion-proof film 5 is arranged on the lower surface wall of the blast-proof plate 3, a limiting groove 12 matched with the end part of the blast-proof plate 3 is formed in the inner side wall of the pore plate 4, an outer sealing ring 8 is arranged on the periphery of the pore plate 4, positioning grooves 11 are symmetrically formed in the inner side wall of the outer sealing ring 8, positioning convex rods 7 matched with the positioning grooves 11 are symmetrically fixed at the upper end and the lower end of the outer surface wall of the pore plate 4, the cap structure is mainly used for 18650 power batteries, wherein two ends of the blast-proof plate 3 are embedded into the limiting grooves 12, the installation stability and accuracy of the blast-proof plate 3 can be effectively improved, the deflection is avoided, and when the outer sealing ring 8 is installed, the positioning convex rods 7 can be embedded into the positioning grooves 11, and then can effectively guarantee the stability of outer seal ring 8 installation, avoid taking place to shift because of the extrusion.

Further, be equipped with cavity 9 between the bottom of rupture membrane 5 and orifice plate 4, the inside intermediate position department of cavity 9 is connected with spring 13, and the bilateral symmetry of the inside bottom of cavity 9 is connected with buffer board 10, and when the block pressurized, buffer board 10 and spring 13 can effectively cushion too big pressure, avoid the block pressurized and damage, have prolonged the life of block.

Further, the upper surface wall of top cap 1 is seted up there is the gas pocket 2, and the gas pocket 2 has been seted up one at least, and a large amount of gases that produce in the battery can be followed gas pocket 2 and discharged, avoid appearing the explosion, and the upper surface wall intermediate position of top cap 1 is upwards protruding to form the bellying, forms the transition chamber between bellying and explosion-proof plate 3.

Further, a transition tab 6 is fixed at the bottom end of the pore plate 4, through holes are symmetrically formed in the lower surface wall of the pore plate 4 and opposite to the transition tab 6, the transition tab 6 is welded on the pore plate 4 through ultrasonic waves, and pressure relief is facilitated through the formed through holes.

The working principle and the using process of the utility model are as follows: when assembling this block, top cap 1 is located the top, it plays the effect of support, still as the positive terminal, wherein, inlay the both ends of blast resistant panel 3 and establish into the spacing groove 12 of seting up on orifice plate 4 in, can effectively increase the stability and the degree of accuracy of blast resistant panel 3 installation, avoid taking place crooked, secondly, when installation outer seal ring 8, can imbed location nose bar 7 to constant head tank 11 in, and then can effectively guarantee the stability of outer seal ring 8 installation, avoid taking place to shift because of the extrusion, in addition, when the block pressurized, buffer board 10 and spring 13 in the cavity 9 can effectively cushion too big pressure, avoid the block pressurized and damage, the life of block has been prolonged.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments 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 block structure for power battery which characterized in that: including top cap (1) and orifice plate (4), top cap (1) is installed in the top of orifice plate (4), and the bottom of top cap (1) is equipped with explosion-proof plate (3), the lower table wall of explosion-proof plate (3) is equipped with rupture membrane (5), spacing groove (12) with explosion-proof plate (3) tip looks adaptation are seted up to the inside wall of orifice plate (4), the periphery of orifice plate (4) is equipped with outer seal ring (8), constant head tank (11) have been seted up to the inside wall symmetry of outer seal ring (8), lower extreme symmetry is fixed with location nose bar (7) with constant head tank (11) looks adaptation on the exterior wall of orifice plate (4).

2. A cap structure for a power battery according to claim 1, characterized in that: be equipped with cavity (9) between the bottom of rupture membrane (5) and orifice plate (4), the inside intermediate position department of cavity (9) is connected with spring (13), and the bilateral symmetry of the inside bottom of cavity (9) is connected with buffer board (10).

3. A cap structure for a power battery according to claim 1, characterized in that: the upper surface wall of the top cover (1) is provided with an air hole (2).

4. A cap structure for a power battery according to claim 1, characterized in that: the middle position of the upper surface wall of the top cover (1) protrudes upwards to form a protruding part, and a transition cavity is formed between the protruding part and the explosion-proof plate (3).

5. A cap structure for a power battery according to claim 1, characterized in that: and a transition lug (6) is fixed at the bottom end of the pore plate (4).

6. A cap structure for a power battery according to claim 5, characterized in that: through holes are symmetrically formed in the positions, facing the transition tabs (6), of the lower surface wall of the pore plate (4).