CN218827627U

CN218827627U - Lithium battery with automatic power-off protection function

Info

Publication number: CN218827627U
Application number: CN202223434657.8U
Authority: CN
Inventors: 谢志刚; 陈婷
Original assignee: Weirui New Energy Co ltd
Current assignee: Weirui New Energy Co ltd
Priority date: 2022-12-22
Filing date: 2022-12-22
Publication date: 2023-04-07
Anticipated expiration: 2032-12-22

Abstract

The utility model discloses a lithium battery with automatic power-off protection function, which comprises a battery box for containing a battery pack, wherein the battery pack is arranged at the inner side of the battery box, and the interior of the battery box is of a cavity structure; further comprising: the positioning plate is fixedly arranged at the middle section of the inner side of the battery box, the battery pack penetrates through the positioning plate, and the battery pack is fixedly connected with the positioning plate; the positive plate, install in the upper end of battery case, just the positive plate is close to one side of group battery is provided with the cushion. This lithium cell with auto-power-off protection function is through setting up gasbag, positive plate, second conductive spring and stopper, and when the group battery was overheated because of charging or discharging, the gas in the gasbag was heated the inflation and upwards is promoted the positive plate, extrudees second conductive spring, pushes away the stopper spacing groove department and makes its block, realizes the power-off protection to the battery.

Description

Lithium battery with automatic power-off protection function

Technical Field

The utility model relates to a lithium cell technical field specifically is a lithium cell with automatic power-off protection function.

Background

Lithium batteries are batteries using non-aqueous electrolyte solution and using lithium metal or lithium alloy as positive/negative electrode material, and are mainly divided into two types, namely rechargeable lithium batteries and disposable lithium batteries.

If a negative pole can from outage lithium cell of publication No. CN204361200U, control through negative pole elastic mechanism, during the use, compress tightly through clip or its self fixed beam, can use after compressing tightly, after not using, directly through negative pole elastic mechanism automatic disconnection, protection lithium cell positive and negative pole piece, but this negative pole can from outage lithium cell, from outage effect only acts on the automatic disconnection when not using, if the battery appears overheated overload during the use, can't automatic disconnection protection battery, there is certain use defect.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a lithium cell with auto-power-off protection function to solve the present market that above-mentioned background art provided on the negative pole can be from the outage lithium cell, only act on the automatic disconnection when not using from the outage effect, if battery overheat overload appears during the use, the problem of the protection battery that can't open circuit automatically.

In order to achieve the above object, the utility model provides a following technical scheme: a lithium battery with an automatic power-off protection function comprises a battery box for containing the lithium battery, wherein a battery pack is arranged on the inner side of the battery box, and the inside of the battery box is of a cavity structure;

further comprising: the positioning plate is fixedly arranged at the middle section of the inner side of the battery box, the battery pack penetrates through the positioning plate, and the battery pack is fixedly connected with the positioning plate;

the positive plate is arranged at the upper end of the battery box, and a cushion block is arranged on one side, close to the battery pack, of the positive plate;

the negative plate is installed at the lower end of the battery box, a first conductive spring is arranged on one side, close to the battery pack, of the negative plate, and the end portion of the first conductive spring is attached to the negative end of the battery pack.

Preferably, one side of the positive plate, which is far away from the battery pack, is provided with a second conductive spring, two ends of the second conductive spring are respectively connected with the battery box and the second conductive spring, and the upper end of the battery box is fixedly provided with a power transmission set.

Through adopting above-mentioned technical scheme, the electric current in the group battery is exported to the second spring by the positive plate, and then is exported by the transmission of electricity group.

Preferably, the locating plate with the symmetry is provided with two gasbags between the positive plate, just length when the gasbag inflation is greater than the locating plate with distance between the positive plate, and the length is less than during the gasbag shrink the locating plate with distance between the positive plate.

By adopting the technical scheme, the air bag jacks up the positive plate when being heated and expanded to separate the cushion block from the positive end of the battery pack so as to separate the cushion block from the positive end of the battery pack.

Preferably, sliding grooves are formed in inner walls of two sides of the upper end of the battery box, sliding blocks are arranged on two sides, close to the sliding grooves, of the positive plate, and the sliding grooves and the sliding blocks form a sliding connection relationship.

Through adopting above-mentioned technical scheme, the sliding tray plays about spacing with the sliding block is just to the polar plate, makes its motion range restriction in the sliding tray.

Preferably, the holding tank has been seted up to the side of positive plate, just be provided with the stopper in the holding tank, and the stopper with fixedly connected with insulating spring between the holding tank, simultaneously the stopper with the holding tank constitutes sliding connection relation.

Through adopting above-mentioned technical scheme, during the stopper was taken in the holding tank completely, extrusion insulating spring.

Preferably, a limiting groove is formed in one side, close to the limiting block, of the battery box in a penetrating mode, a pressing block is connected in the limiting groove in a sliding mode, and the position of the limiting block is equal to the position of the limiting groove in size.

By adopting the technical scheme, when the position of the limiting block is overlapped with the limiting groove, the insulating spring outwards pushes out the limiting block, so that the limiting block is clamped with the limiting groove to fix the positive plate. Press down during the pressing piece is taken in the holding tank again with the stopper, can let the second conductive spring of compressed promote the positive plate downwards, make its and group battery butt joint, the rework.

Compared with the prior art, the beneficial effects of the utility model are that: this lithium cell with auto-power-off protection function is through setting up gasbag, positive plate, second conductive spring and stopper, when the group battery is overheated because of charging or discharging, the gas in the gasbag is heated the inflation and upwards promotes the positive plate, extrudees second conductive spring, pushes away the stopper spacing groove department and makes its block, realizes the power-off protection to the battery, and concrete content is as follows:

1. the battery pack is provided with a battery box, a sliding groove, a positive plate, a sliding block, a cushion block, a second conductive spring and an air bag, when the battery pack is overheated due to charging or discharging, gas in the air bag is heated to expand and push the positive plate upwards so that the positive plate slides along the sliding groove and extrudes the second conductive spring, and the cushion block on the positive plate is separated from the positive end of the battery pack, so that automatic power-off protection of the battery is realized when the battery works in an overheating way;

2. be provided with the spacing groove, the holding tank, the stopper, insulating spring and press the briquetting, the positive plate drives the stopper upwards and slides when upwards sliding, when stopper and spacing groove position coincide, insulating spring outwards ejecting stopper makes it and spacing groove block, and then the position of fixed positive plate, after the temperature reduction, only need push down during pressing the briquetting makes the stopper take in the holding tank completely, by the below promotion positive plate of extruded second conductive spring make cushion and group battery positive terminal recontact start work, realize the quick butt joint to battery outage department.

Drawings

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

FIG. 2 is a schematic view of a half-section structure of the present invention;

FIG. 3 is an enlarged schematic view of the structure at A in FIG. 2 according to the present invention;

FIG. 4 is a schematic view of the internal split structure of the present invention;

fig. 5 is a schematic diagram of the structure of the positive plate half-section of the present invention.

In the figure: 1. a battery case; 101. a sliding groove; 102. a limiting groove; 2. a battery pack; 3. positioning a plate; 4. a positive plate; 401. a slider; 402. accommodating grooves; 5. cushion blocks; 6. a negative plate; 7. a first conductive spring; 8. a second conductive spring; 9. a power transmission set; 10. an air bag; 11. a limiting block; 12. an insulating spring; 13. and pressing the block.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution: a lithium battery with an automatic power-off protection function comprises a battery box 1 for containing the lithium battery, wherein a battery pack 2 is arranged on the inner side of the battery box 1, and the inside of the battery box 1 is of a cavity structure;

further comprising: the positioning plate 3 is fixedly arranged at the middle section of the inner side of the battery box 1, the battery pack 2 penetrates through the positioning plate 3, and the battery pack 2 is fixedly connected with the positioning plate 3; the positive plate 4 is arranged at the upper end of the battery box 1, and a cushion block 5 is arranged on one side, close to the battery pack 2, of the positive plate 4; the negative plate 6 is installed at the lower end of the battery box 1, one side, close to the battery pack 2, of the negative plate 6 is provided with a first conductive spring 7, and the end portion of the first conductive spring 7 is attached to the negative end of the battery pack 2. One side that group battery 2 was kept away from to positive plate 4 is provided with second conductive spring 8, and battery case 1 and second conductive spring 8 are connected respectively to the both ends of second conductive spring 8 to the upper end fixed mounting of battery case 1 has transmission group 9. Two air bags 10 are symmetrically arranged between the positioning plate 3 and the positive plate 4, the length of the air bags 10 during expansion is larger than the distance between the positioning plate 3 and the positive plate 4, and the length of the air bags 10 during contraction is smaller than the distance between the positioning plate 3 and the positive plate 4. Sliding grooves 101 are formed in the inner walls of the two sides of the upper end of the battery case 1, sliding blocks 401 are arranged on the two sides of the positive electrode plate 4 close to the sliding grooves 101, and the sliding grooves 101 and the sliding blocks 401 form a sliding connection relationship. As shown in fig. 1-3, when the battery pack 2 is overheated due to charging or discharging, the gas in the airbag 10 attached to the battery pack 2 is heated to expand, the positioning plate 3 fixes the battery pack 2 and the airbag 10, the expanded airbag 10 pushes the positive plate 4 upwards, the sliding block 401 on the positive plate 4 slides upwards along the sliding groove 101 to press the second conductive spring 8, and the positive plate 4 moves upwards to drive the cushion block 5 to separate from the positive end of the battery pack 2, thereby realizing automatic power-off protection of the overheated battery.

Accommodating groove 402 has been seted up to the side of positive plate 4, and is provided with stopper 11 in the accommodating groove 402 to fixedly connected with insulating spring 12 between stopper 11 and the accommodating groove 402, stopper 11 constitutes the sliding connection relation with accommodating groove 402 simultaneously. A limiting groove 102 penetrates through one side, close to the limiting block 11, of the battery box 1, a pressing block 13 is connected in the limiting groove 102 in a sliding mode, and the position of the limiting block 11 is equal to the position of the limiting groove 102 in size. As shown in fig. 4-5, when the air bag 10 expands to push the positive plate 4 upwards, the limiting block 11 is driven to slide along the inner wall of the battery box 1, when the position of the limiting block 11 overlaps the limiting groove 102, the extruded insulating spring 12 pushes out the limiting block 11 outwards to be clamped with the limiting groove 102, and the positive plate 4 is fixed, even if the air bag 10 cools and contracts, the positive plate 4 cannot return to the original position, when the battery pack 2 is cooled, the pressing block 13 is pressed down, the limiting block 11 is completely received in the accommodating groove 402 to press the insulating spring 12, the second conductive spring 8 pushes the positive plate 4 downwards, the cushion block 5 on the positive plate 4 is contacted with the positive end of the battery pack 2 again, and the device can continue to work. The quick butt joint of the power-off position of the battery is realized.

The working principle is as follows: when the lithium battery with the automatic power-off protection function is used, firstly, as shown in fig. 1-5, when the battery is overheated, the airbag 10 expands to upwards push the positive plate 4, so that the positive plate 4 slides along the sliding groove 101, and then the cushion block 5 is driven to separate from the positive end of the battery pack 2, so as to realize automatic power-off protection of the battery pack 2, and the positive plate 4 drives the limiting block 11 to be clamped with the limiting groove 102 to limit the positive plate 4 in the sliding process, after the battery pack 2 is cooled, the pressing block 13 is pressed down to enable the limiting block 11 to re-press the insulating spring 12 to be contained in the containing groove 402, and the pressed second conductive spring 8 downwards pushes the positive plate 4 to enable the cushion block 5 to be re-butted with the positive end of the battery pack 2 to start working.

Those not described in detail in this specification are within the skill of the art.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. A lithium battery with an automatic power-off protection function comprises a battery box (1) for containing the lithium battery, wherein a battery pack (2) is arranged on the inner side of the battery box (1), and the inside of the battery box (1) is of a cavity structure;

it is characterized by also comprising:

the positioning plate (3) is fixedly arranged at the middle section of the inner side of the battery box (1), the battery pack (2) penetrates through the positioning plate (3), and the battery pack (2) is fixedly connected with the positioning plate (3);

the positive plate (4) is mounted at the upper end of the battery box (1), and a cushion block (5) is arranged on one side, close to the battery pack (2), of the positive plate (4);

the negative plate (6) is mounted at the lower end of the battery box (1), a first conductive spring (7) is arranged on one side, close to the battery pack (2), of the negative plate (6), and the end portion of the first conductive spring (7) is attached to the negative end of the battery pack (2).

2. A lithium battery with auto-power-off protection as claimed in claim 1, characterized in that: keep away from positive plate (4) one side of group battery (2) is provided with second conductive spring (8), just the both ends of second conductive spring (8) are connected respectively battery case (1) with second conductive spring (8), and the upper end fixed mounting of battery case (1) has transmission group (9).

3. The lithium battery with the automatic power-off protection function according to claim 1, characterized in that: locating plate (3) with the symmetry is provided with two gasbag (10) between positive plate (4), just length when gasbag (10) inflation is greater than locating plate (3) with distance between positive plate (4), and length is less than during gasbag (10) shrink locating plate (3) with distance between positive plate (4).

4. The lithium battery with the automatic power-off protection function according to claim 1, characterized in that: sliding grooves (101) are formed in the inner walls of the two sides of the upper end of the battery box (1), sliding blocks (401) are arranged on the two sides, close to the sliding grooves (101), of the positive plate (4), and the sliding grooves (101) and the sliding blocks (401) form a sliding connection relation.

5. The lithium battery with the automatic power-off protection function according to claim 1, characterized in that: accommodating groove (402) has been seted up to the side of positive plate (4), just be provided with stopper (11) in accommodating groove (402), and stopper (11) with fixedly connected with insulating spring (12) between accommodating groove (402), simultaneously stopper (11) with accommodating groove (402) constitute sliding connection relation.

6. The lithium battery with the automatic power-off protection function according to claim 5, characterized in that: a limiting groove (102) penetrates through one side, close to the limiting block (11), of the battery box (1), a pressing block (13) is connected in the limiting groove (102) in a sliding mode, and the position of the limiting block (11) is equal to the position of the limiting groove (102) in size in a corresponding mode.