CN220358290U

CN220358290U - High-safety lithium power battery with CID configuration

Info

Publication number: CN220358290U
Application number: CN202321366671.0U
Authority: CN
Inventors: 谢群; 金凯荣; 章元; 徐爽
Original assignee: Shihlien Chemical Industrial Jiangsu Co
Current assignee: Shilian Special Battery Energy Huai'an Co ltd
Priority date: 2023-06-01
Filing date: 2023-06-01
Publication date: 2024-01-16
Anticipated expiration: 2033-06-01

Abstract

The utility model relates to a high-safety lithium power battery with CID configuration, and belongs to the technical field of lithium ion power batteries. The utility model provides a battery main part that its main safety protection structure that lacks to current product, includes by casing, roll up core, conductive component and end cover and constitute, conductive component is including setting up in the inside busbar of casing, and the top of busbar is equipped with roof down, top board and plastic baffle in proper order, install the CID spare that is used for the outage protection on the top board, the end cover is including assembling in the terminal upper cover plate of casing, is provided with on the upper cover plate and is used for electrically conductive post and explosion-proof valve. According to the utility model, through the arrangement of the CID, the current in the battery loop can be cut off when the lithium power battery fails, the internal pressure is increased and the temperature is increased, so that the occurrence of serious abnormal conditions such as explosion, fire and the like of the battery is effectively prevented, and the safety performance of the lithium power battery is improved.

Description

High-safety lithium power battery with CID configuration

Technical Field

The utility model relates to the technical field of lithium ion power batteries, in particular to a high-safety lithium power battery with CID configuration.

Background

Compared with the traditional fuel oil automobile, the new energy electric automobile has more and more remarkable advantages. The new energy electric automobile is rapidly developed, and meanwhile, the automobile power battery is greatly improved in energy density and service life. In the society advocating "green, energy saving and emission reduction", cylindrical lithium power batteries are favored by automobile manufacturers with the advantages of green pollution-free and high energy density.

The safety performance of lithium batteries has also been one of the criteria that practitioners consider whether a battery is acceptable. When the battery is in abnormal conditions such as short circuit, overcharge and overdischarge, the inside of the battery is reacted vigorously to generate a large amount of gas, and the pressure in the battery is increased suddenly along with the abrupt temperature rise. If the abnormal situation is continuously carried out, heat in the battery is continuously accumulated, the pressure is continuously increased, explosion and fire risks can occur, and the vehicle, personnel and the like are damaged to different degrees.

Therefore, how to process the lithium ion power battery is a technical problem that the skilled person needs to solve.

Disclosure of Invention

The utility model aims to solve the problems in the background technology and provides a high-safety lithium power battery with CID configuration.

The technical scheme of the utility model is as follows: the utility model provides a dispose high security performance lithium power battery of CID, includes the battery body that comprises casing, reel core, conductive component and end cover, conductive component is including setting up in the inside busbar of casing, and the top of busbar is equipped with roof down, top board and plastic baffle in proper order, install the CID spare that is used for the outage protection on the top board;

the end cover comprises an upper cover plate assembled at the tail end of the shell, and a pole column for conducting and an explosion-proof valve for explosion prevention are arranged on the upper cover plate;

the edge of the plastic partition plate is provided with a downward extending annular sleeve along the circumferential direction, and the annular sleeve is used for blocking the upper supporting plate from contacting the shell with the lower top plate.

Preferably, the winding core is arranged in the shell, and the winding core is positioned below the bus bar.

Preferably, a hole is formed in the center of the upper cover plate, the pole is arranged in the hole, and a sealing ring for insulation is arranged in the hole.

Preferably, through holes located on the upper cover plate are formed in two sides of the pole, the explosion-proof valve is arranged in the right side through holes, and penetrating holes penetrating through the upper supporting plate, the lower top plate and the bus bars are formed in the right side below the through holes.

Preferably, the bottom end of the pole penetrates through the plastic partition plate and is connected to the upper supporting plate, the vertical section of the CID piece is of a bowl-shaped structure, the bowl bottom of the CID piece is connected with the bus bar, and the bowl bottom is connected with the upper supporting plate and is connected in series to form a loop.

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

through the setting of CID spare, and then it can break down at lithium power battery, and inside pressure increases, cuts off the electric current in the battery return circuit when the temperature risees, effectively prevents the emergence of great abnormal conditions such as explosion, fire of battery, has promoted lithium power battery's security performance.

Drawings

FIG. 1 is a schematic perspective view of an embodiment of the present utility model;

FIG. 2 is a schematic view of the partial front cross-sectional structure of FIG. 1;

fig. 3 is an enlarged schematic view of a partial structure at a of fig. 2.

Reference numerals: 1. a battery main body; 11. a housing; 12. a winding core; 13. a conductive assembly; 131. a bus bar; 132. a lower top plate; 133. an upper supporting plate; 134. a CID piece; 135. a plastic separator; 14. an end cap; 141. an upper cover plate; 142. a pole; 143. an explosion-proof valve.

Detailed Description

The technical scheme of the utility model is further described below with reference to the attached drawings and specific embodiments.

Example 1

As shown in fig. 1 to 3, the high-safety lithium power battery with CID configuration according to the present utility model includes a battery body 1 composed of a case 11, a winding core 12, a conductive member 13 and an end cap 14. The conductive assembly 13 includes a bus bar 131 disposed inside the housing 11. A lower top plate 132, an upper support plate 133 and a plastic spacer 135 are sequentially disposed above the bus bar 131, and a CID piece 134 for power-off protection is mounted on the upper support plate 133.

The end cap 14 includes an upper cap plate 141 fitted to the end of the housing 11, and a pole 142 for electrical conduction and an explosion-proof valve 143 for explosion-proof are provided on the upper cap plate 141.

In this embodiment, CID 134 acts as a current cutoff device to directly cut off current to avoid continuous battery reaction.

In this embodiment, a slot hole is formed above the CID piece 134 and located on the upper cover 141.

The working principle of the high-safety lithium power battery with CID configuration based on the first embodiment is as follows: in normal operation inside the battery body 1, the CID piece 134 is turned down while maintaining a normal state and is connected with the bus bar 131, forming a complete path. When the battery is in abnormal conditions such as short circuit, overcharge, overdischarge, etc., the temperature inside the battery body 1 is raised and gas is generated, the pressure is increased, and the flip pressure of the CID piece 134 is generally set at 5-15 kg, and the CID piece 134 is flipped and opened when reaching the set value. At this time, the CID 134 is disconnected from the bus bar 131, the inside of the battery body 1 is in an open state, and no more current passes, preventing the internal reaction of the battery body 1. The CID piece 134 is turned upwards and then is intermittently opened, so that the pressure inside the battery body 1 can be released, heat is emitted, and the safety of the battery body 1 is greatly improved. The CID 134 protects the explosion-proof valve 143 before the explosion-proof valve 143, the explosion pressure of the explosion-proof valve 143 is generally 5-25 kg, the CID 134 and the explosion-proof valve 143 form double protection to the battery body 1, and the safety performance is greatly improved.

Example two

As shown in fig. 2-3, based on the first embodiment, this embodiment further includes: the winding core 12 is disposed inside the housing 11, and the winding core 12 is located below the bus bar 131. The center of the upper cover plate 141 is provided with a hole, the pole 142 is disposed in the hole, and a sealing ring for insulation is disposed in the hole. The post 142 has through holes on the upper cover plate 141 on both sides, the explosion-proof valve 143 is disposed in the right through hole, and through holes penetrating the upper support plate 133, the lower top plate 132, and the bus bar 131 are disposed below the right through hole.

In this embodiment, the bus bar 131 contacts the lower top plate 132 to form a conductive path.

In this embodiment, the through hole is disposed such that when high voltage occurs in the battery main body 1, if the CID piece 134 is opened, the pressure and explosion are released through the explosion-proof valve 143.

Example III

As shown in fig. 2, based on the first or second embodiment, the present embodiment further includes: the bottom end of the pole 142 passes through the plastic spacer 135 and is connected to the upper plate 133. The CID 134 has a bowl-shaped vertical section, the bowl bottom of which is connected with the bus bar 131, and the bowl portion of which is connected with the upper support plate 133 and connected in series to form a loop. The edge of the plastic spacer 135 is provided with a downwardly extending annular sleeve in the circumferential direction for blocking the upper plate 133 from contacting the lower plate 132 with the housing 11.

In the present embodiment, the insulation of the plastic spacer 135 insulates the upper plate 133 from the upper cover plate 141, and prevents the upper plate 133 from contacting the inner wall of the housing 11 with the lower plate 132.

The above-described embodiments are merely a few preferred embodiments of the present utility model, and many alternative modifications and combinations of the above-described embodiments will be apparent to those skilled in the art based on the technical solutions of the present utility model and the related teachings of the above-described embodiments.

Claims

1. The utility model provides a dispose high security performance lithium power battery of CID, includes battery body (1) that constitutes by casing (11), reel core (12), electrically conductive subassembly (13) and end cover (14), its characterized in that: the conductive assembly (13) comprises a bus bar (131) arranged in the shell (11), a lower top plate (132), an upper supporting plate (133) and a plastic partition plate (135) are sequentially arranged above the bus bar (131), and a CID (134) for power-off protection is arranged on the upper supporting plate (133);

the end cover (14) comprises an upper cover plate (141) assembled at the tail end of the shell (11), and a pole column (142) for conducting and an explosion-proof valve (143) for explosion prevention are arranged on the upper cover plate (141);

the edge of the plastic partition plate (135) is provided with a downward extending annular sleeve along the circumferential direction for blocking the upper supporting plate (133) from contacting the shell (11) with the lower top plate (132).

2. The CID configured high safety performance lithium power cell of claim 1, wherein: the winding core (12) is arranged in the shell (11), and the winding core (12) is positioned below the bus bar (131).

3. The CID configured high safety performance lithium power cell of claim 1, wherein: the center of the upper cover plate (141) is provided with a hole, the pole (142) is arranged in the hole, and a sealing ring for insulation is arranged in the hole.

4. The CID configured high safety performance lithium power cell of claim 1, wherein: the two sides of the pole column (142) are provided with through holes on the upper cover plate (141), the explosion-proof valve (143) is arranged in the right side of the through holes, and through holes penetrating through the upper supporting plate (133), the lower top plate (132) and the bus bars (131) are formed below the right side of the through holes.

5. The CID configured high safety performance lithium power cell of claim 1, wherein: the bottom end of the pole column (142) penetrates through the plastic partition plate (135) and is connected to the upper supporting plate (133), the vertical section of the CID piece (134) is of a bowl-shaped structure, the bowl bottom of the CID piece is connected with the bus bar (131), and the bowl portion is connected with the upper supporting plate (133) and is connected in series to form a loop.