CN222620020U

CN222620020U - Battery cover, lithium battery and battery pack

Info

Publication number: CN222620020U
Application number: CN202420443230.4U
Authority: CN
Inventors: 王洋; 袁德恒; 郑盼斌; 闻寅; 梁平
Original assignee: Xiaogan Chuneng New Energy Innovation Technology Co ltd
Current assignee: Xiaogan Chuneng New Energy Innovation Technology Co ltd
Priority date: 2024-03-07
Filing date: 2024-03-07
Publication date: 2025-03-14
Anticipated expiration: 2034-03-07

Abstract

The utility model provides a battery top cover, a lithium battery and a battery pack, wherein the battery top cover is connected with a shell with an opening at one side, the battery top cover comprises a cover plate, a pole column and an explosion-proof valve, the cover plate is used for sealing the opening at one side of the shell, the pole column is arranged on the cover plate, through holes are formed in the thickness direction of the cover plate in a penetrating mode, so that pole lugs extend into the through holes from the end, close to the cover plate, of the through holes to be connected with the pole column, and an explosion-proof valve cover is arranged on the through holes of the pole column.

Description

Battery top cap, lithium cell and group battery

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery top cover, a lithium battery and a battery pack.

Background

The battery is square hard shell lithium cell, the battery includes the casing, locate the electric core in the casing and be used for sealed casing's top cap, the top cap includes apron and utmost point post, the utmost point post is installed on the apron, patent CN220086323U provides a battery utmost point post, battery and power consumption device, in this technical scheme, the bottom of utmost point post inwards caves in and forms the recess, the utmost point ear stretches into in the recess and is connected with the lateral wall of recess, the pressure release passageway has been seted up on the apron simultaneously, make inside and the external intercommunication of casing through the pressure release passageway, the pressure release passageway is sealed through the explosion-proof valve, wherein, explosion-proof valve and pressure release passageway constitute explosion-proof assembly. When assembling the battery, need assemble explosion-proof component and utmost point post respectively, the manufacturing process is loaded down with trivial details not convenient enough.

Disclosure of utility model

In view of this, the utility model provides a battery top cover, a lithium battery and a battery pack, wherein through holes are formed in the pole, the explosion-proof valve is arranged on the pole, a pressure release channel is not required to be additionally formed in the cover plate, the explosion-proof valve is assembled on the pressure release channel, and the operation process is simplified, and the operation is simple, convenient and quick.

The technical scheme is that the battery top cover is connected with a shell with an opening at one side, the battery top cover comprises a cover plate, a pole column and an explosion-proof valve, the cover plate is used for sealing the opening at one side of the shell, the pole column is arranged on the cover plate, through holes are formed in the thickness direction of the cover plate in a penetrating mode, and the pole lugs extend into the through holes from the end portions, close to the cover plate, of the through holes to be connected with the pole column, and the explosion-proof valve cover is arranged on the through holes of the pole column.

On the basis of the above technical scheme, preferably, the pole comprises a first flange, the first flange is located on one side, close to the shell, of the through hole, and the pole lug stretches into the through hole to be overlapped with the first flange.

On the basis of the above technical solution, preferably, the pole further includes a second flange, the second flange is located at an upper portion of the pole, and the second flange is used for connecting the cover plate and the pole.

Still further preferably, the terminal further includes a third flange provided inside the through hole, the third flange being located between the first flange and the second flange, and the explosion-proof valve overlapping with a top of the third flange.

Preferably, a receiving part is arranged at the end part of the third flange, which is far away from the shell, so that the explosion-proof valve is connected with the receiving part.

Preferably, the battery top cover further comprises a plastic ring and a welding ring, wherein the plastic ring is arranged between the cover plate and the polar post to separate the cover plate and the polar post, and the welding ring is arranged between the plastic ring and the cover plate to connect the plastic ring and the cover plate.

The utility model provides a lithium battery, including casing, electric core and battery top cap.

The utility model also provides a group battery, including a plurality of lithium cell is connected with the busbar between two adjacent lithium cells, the busbar with every lithium cell the battery top cap is connected, the busbar cover is established the utmost point post outside of battery top cap.

Compared with the prior art, the battery top cover, the lithium battery and the battery pack have the following beneficial effects:

(1) The utility model discloses in the utmost point post is followed the thickness direction of apron runs through and is equipped with the through-hole, has the messenger the casing and external effect that communicates, will the explosion-proof valve sets up on the utmost point post, because the utmost point post can make the casing communicates with external, so has the effect of pressure release, has replaced original pressure release passageway, at the in-process of assembly, need not be in a pressure release passageway is seted up in addition on the apron, will the explosion-proof valve is assembled on the pressure release passageway, and instead, only need will the explosion-proof valve is assembled on the utmost point post can, simplified operation process, it is simple and convenient swift.

(2) The explosion-proof valve, the busbar and the pole are integrated together, so that the high integration reduces the production cost.

(3) The third flange is arranged on one side of the cover plate, which is close to the shell, and the explosion-proof valve is arranged on the third flange, so that the explosion-proof valve does not protrude out of the cover plate, and the space in the shell is fully utilized.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a perspective view of a lithium battery of the present utility model;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is a cross-sectional view of the pole of FIG. 1;

Fig. 5 is an assembly view of a plurality of lithium batteries of fig. 1.

Reference numerals are lithium battery 1000, battery top cover 100, cover plate 1, pole 2, first flange 21, second flange 22, third flange 23, receiving part 231, through hole 24, explosion-proof valve 3, plastic ring 4, welding ring 5 housing 200, battery core 300, pole lug 400, and bus bar 500.

Detailed Description

The following description of the embodiments of the present utility model will clearly and fully describe the technical aspects of the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, are intended to fall within the scope of the present utility model.

As shown in fig. 1, in combination with fig. 2 to 4, the present utility model provides a battery top cover 100 connected with a housing 200 having an opening at one side, the battery top cover 100 includes a cover plate 1, a pole 2 and an explosion-proof valve 3, the cover plate 1 is used for sealing the opening at one side of the housing 200, the pole 2 is disposed on the cover plate 1, a through hole 24 is formed along the thickness direction of the cover plate 1 in a penetrating manner, so that a tab 400 extends into the through hole 24 from the end of the through hole 24 near the cover plate 1 to be connected with the pole 2, and the explosion-proof valve 3 is covered on the through hole 24 of the pole 2.

In the above technical solution, the connection manner between the cover plate 1 and the pole 2 is not limited, and may be performed by welding or other manners, where, since the pole 2 is generally made of a conductive material, and the pole 2 is connected to the cover plate 1, in order to avoid electrification of the cover plate 1, an insulating material is generally disposed between the cover plate 1 and the pole 2 to isolate the pole 2 and the cover plate 1, and the present application is not limited to the specific material of the insulating material, and may be selected according to specific situations. The pole 2 is provided with a through hole 24 along the thickness direction of the cover plate 1, so that the pole lug 400 extends into the through hole 24 from the end of the through hole 24 near the cover plate 1 to be connected with the pole 2, wherein the specific shape of the through hole 24 is not limited, and may be a cylindrical through hole, a cubic through hole, or the like, so long as the shell 200 can be communicated with the outside through the through hole 24, and the specific connection mode between the pole lug 400 and the pole lug 2 is not limited, and in some embodiments, in order to enable the pole lug 400 to be firmly connected with the pole lug 2, a welding mode is generally adopted to connect the pole lug 400 and the pole lug 2. The explosion-proof valve 3 is covered on the through hole 24 of the pole 2.

The utility model discloses in the utmost point post 2 is followed the thickness direction of apron 1 runs through and is equipped with through-hole 24, has the messenger the casing 200 and external effect that communicates, will explosion-proof valve 3 sets up on the utmost point post 2, because utmost point post 2 can make casing 200 and external intercommunication, so have the effect of pressure release, replaced original pressure release passageway, at the in-process of assembly, no longer need be in an additional pressure release passageway of seting up on apron 1, will explosion-proof valve 3 is assembled to pressure release passageway is last, and the substitution only needs will explosion-proof valve 3 is assembled to on the utmost point post 2 can, has simplified operation process, and is simple and convenient swift.

In some embodiments, the battery top cover 100 further includes a plastic ring 4 and a welding ring 5, the plastic ring 4 is disposed between the cover plate 1 and the pole 2 to separate the cover plate 1 and the pole 2, the welding ring 5 is disposed between the plastic ring 4 and the cover plate 1 to connect the plastic ring 4 and the cover plate 1, the plastic ring 4 serves to isolate the cover plate 1 and the pole 2, the cover plate 1 is prevented from being electrified, the connection manner between the plastic ring 4 and the pole 2 and the welding ring 5 is not limited, the connection can be realized by means of glue, and the welding ring 5 serves to firmly connect the pole 2 and the cover plate 1, and prevent the pole 2 from falling off, wherein the application also does not limit the specific shapes of the plastic ring 4 and the welding ring 5.

In the present solution, as shown in fig. 2 and 3, the pole 2 includes a first flange 21, the first flange 21 is located on a side of the through hole 24 near the housing 200, the tab 400 extends into the through hole 24 and is overlapped with the first flange 21, one purpose of the first flange 21 is to facilitate connection between the pole 2 and the tab 400, avoid the tab 400 from falling off, in some embodiments, the first flange 21 is formed by extending inward from an end of the pole 2 near the housing 200, and the present application does not limit a specific connection manner between the tab 400 and the first flange 21, in some embodiments, in order to enable a more fastened connection between the tab 400 and the first flange 21, in order to ensure a supporting strength of the first flange 21, a thickness of the first flange 21 is not less than 0.5mm, in order to strengthen a supporting strength of the first flange 21, and may also be provided with reinforcing ribs, a honeycomb rib, etc. on a surface thereof.

As can be appreciated, the cover plate 1 is provided with a through hole along the thickness direction thereof, the battery top cover 100 further comprises a bearing plate, the bearing plate is located at one side of the cover plate 1 away from the explosion-proof valve 3, the bearing plate is connected with the cover plate 1, the end of the pole 2, which is close to the housing 200, is located on the bearing plate through the through hole, in this technical scheme, the specific shape of the bearing plate is not limited, so long as the pole 2 can be placed, when the pole 2 is assembled on the cover plate 1, a part of the pole 2 sinks into the housing 200 of the lithium battery 1000, the volume of the exposed outside of the pole 2 is reduced, the space inside the housing 200 of the lithium battery 1000 is more fully utilized, and the space utilization rate of the housing 200 is improved. In some embodiments, in order to improve the stress intensity of the receiving plate, the thickness range of the receiving plate may be set to be not less than 0.8mm.

Further, the pole 2 further includes a second flange 22, the second flange 22 is located at the upper portion of the pole 2, the second flange 22 is used to connect the cover plate 1 and the pole 2, as shown in fig. 3, the thickness of the second flange 22 is not less than 0.5mm to ensure the supporting strength of the second flange 22, in some embodiments, the second flange 22 is formed by extending the end of the pole 2 away from the housing 200 outwards, the second flange 22 is connected to the cover plate 1, and the second flange 22 is connected to the cover plate 1 through the second flange 22, so that the pole 2 and the cover plate 1 can be more firmly connected, preventing the pole 2 from falling off.

Further, the pole 2 further includes a third flange 23, the third flange 23 is disposed inside the through hole 24, the third flange 23 is located between the first flange 21 and the second flange 22, the explosion-proof valve 3 is overlapped with the third flange 23, the purpose of the third flange 23 is to facilitate connection of the third flange 23 with the explosion-proof valve 3, and avoid detachment of the explosion-proof valve 3, the present application is not limited to a specific structure of the third flange 23, as long as the third flange can be used to connect the explosion-proof valve 3, in some embodiments, in order to more firmly connect the explosion-proof valve 3 with the third flange 23, a receiving portion 231 is disposed on the third flange 23, specifically, as shown in fig. 4, the receiving portion 231 is a groove portion formed by recessing an end of the third flange 23 away from the housing 200, so as to better limit the explosion-proof valve 3.

In some embodiments, the third flange 23 is located on a side of the cover plate 1 near the housing 200, and the explosion-proof valve 3 is mounted on the third flange 23, so that the explosion-proof valve 3 is disposed in the housing 200, and space in the housing 200 is fully utilized.

When the first flange 21, the third flange 23, and the second flange 22 are provided in the thickness direction of the cover plate 1 and the thickness direction of the cover plate 1 is set to be a high direction, a certain height difference exists among the first flange 21, the third flange 23, and the second flange 22, a height space existing between the first flange 21 and the third flange 23 is a bending space of the tab 400, and a height space between the third flange 23 and the second flange 22 is a blasting space.

The application also provides a lithium battery 1000, which comprises a shell 200, an electric core 300 and the battery top cover 100. According to the lithium battery 1000 disclosed by the application, the explosion-proof valve 3 is arranged on the pole 2, so that the assembly process is simplified, and the lithium battery is simple, convenient and quick.

In the above technical solutions, the lithium battery 1000 includes all the technical solutions and the beneficial effects of the battery top cover 100 described above, and will not be described in detail herein.

The application also provides a battery pack, which comprises a plurality of lithium batteries 1000, wherein a bus bar 500 is connected between two adjacent lithium batteries 1000, the bus bar 500 is connected with the battery top cover 100 of each lithium battery 1000, and the bus bar 500 is sleeved outside the pole 2 of the battery top cover 100, wherein the explosion-proof valve 3, the bus bar 500 and the pole 2 are integrated together, so that the production cost is reduced due to high integration.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims

1. A battery top cover connected to a housing (200) having an opening on one side, characterized in that the battery top cover comprises a cover plate (1), a pole (2) and an explosion-proof valve (3);

A cover plate (1) used for sealing an opening on one side of the housing (200);

A pole (2) is arranged on the cover plate (1), and a through hole (24) is provided along the thickness direction of the cover plate (1), so that the pole lug (400) extends from the end of the through hole (24) close to the cover plate (1) into the through hole (24) to connect with the pole (2);

An explosion-proof valve (3) is covered on the through hole (24) of the pole (2).

2. The battery top cover according to claim 1 is characterized in that the pole (2) includes a first flange (21), the first flange (21) is located on a side of the through hole (24) close to the shell (200), and the pole ear (400) extends into the through hole (24) and overlaps with the first flange (21).

3. The battery top cover according to claim 2 is characterized in that the pole (2) further comprises a second flange (22), the second flange (22) is located at the upper part of the pole (2), and the second flange (22) is used to connect the cover plate (1) and the pole (2).

4. The battery top cover according to claim 3 is characterized in that the pole (2) further comprises a third flange (23), the third flange (23) is arranged inside the through hole (24), the third flange (23) is located between the first flange (21) and the second flange (22), and the explosion-proof valve (3) overlaps the top of the third flange (23).

5. The battery top cover according to claim 4, characterized in that a receiving portion (231) is provided at the end of the third flange (23) away from the shell (200) for connecting the explosion-proof valve (3) to the receiving portion (231).

6. The battery top cover according to claim 1, characterized in that the battery top cover (100) further comprises a plastic ring (4) and a welding ring (5);

A plastic ring (4) is disposed between the cover plate (1) and the pole (2) to separate the cover plate (1) and the pole (2);

A welding ring (5) is arranged between the plastic ring (4) and the cover plate (1) and is used to connect the plastic ring (4) and the cover plate (1).

7. A lithium battery, characterized in that it comprises a housing (200), a battery cell (300) and a battery top cover (100) as claimed in any one of claims 1 to 6.

8. A battery pack, characterized in that it comprises a plurality of lithium batteries (1000) as described in claim 7, a bus bar (500) is connected between two adjacent lithium batteries (1000), the bus bar (500) is connected to the battery top cover (100) of each lithium battery (1000), and the bus bar (500) is sleeved on the outside of the pole (2) of the battery top cover (100).