CN213717032U

CN213717032U - High-efficient sealed lithium cell upper cover plate structure

Info

Publication number: CN213717032U
Application number: CN202023104740.XU
Authority: CN
Inventors: 支杰; 刘元成; 郝世洪; 张纯辉
Original assignee: Changzhou Wujin Zhongrui Electronic Technology Co ltd
Current assignee: Changzhou Wujin Zhongrui Electronic Technology Co ltd
Priority date: 2020-12-19
Filing date: 2020-12-19
Publication date: 2021-07-16
Anticipated expiration: 2030-12-19

Abstract

The utility model relates to the technical field of lithium batteries, in particular to an efficient sealing upper cover plate structure of a lithium battery, which comprises a cover plate, a pole column, a ceramic sealing ring, a switching piece, an upper isolation ring and a lower isolation ring, wherein a center hole for the pole column to pass through is penetrated through the cover plate, the ceramic sealing ring is sealed between the center hole and the pole column, the inner peripheral surface of the ceramic sealing ring is attached to the outer peripheral surface of the pole column, and the outer peripheral surface of the ceramic sealing ring is attached to the inner peripheral surface of the center hole; the utility model discloses the utilization forms the buffer memory groove between switching piece and ceramic seal ring for store the inside electrolyte and the gas that produces of leaking of lithium cell, play the pressure release function, with this sealed requirement that reduces ceramic seal ring, ceramic seal ring's intensity is high simultaneously, bearing capacity is strong, long service life is high, difficult emergence is out of shape, thereby it is sealed to realize the formation that can stabilize, prevent that the inside electrolyte of leaking of lithium cell from trickling to the external world, and the lower tie wing of connection piece can hold ceramic seal ring tightly, the stability of reinforcing structure.

Description

High-efficient sealed lithium cell upper cover plate structure

Technical Field

The utility model belongs to the technical field of the lithium cell technique and specifically relates to a high-efficient sealed lithium cell upper cover plate structure.

Background

The lithium battery is a chemical battery with higher energy ratio and strong high and low temperature adaptability, basically comprises two categories of lithium metal batteries and lithium ions, is mainly characterized by high energy density, high working voltage, low self-discharge rate and no memory effect, is widely applied to the fields of notebooks, electric tools, electric automobiles and the like, and provides stable and safe power output for the batteries;

at present, inside electrolyte and the electrolyte seal structure of having of casing of lithium cell, the both ends of casing adopt upper cover plate and lower apron to carry out the shutoff respectively, when inefficacy in order to prevent the electrolyte seal structure, the inside electrolyte of leaking of lithium cell trickles to the external world from the upper cover plate, cause the corruption to peripheral lithium cell, can adopt the sealing washer to seal in order to realize the electrolyte shutoff of leaking inside the lithium cell between upper cover plate and the utmost point post among the prior art usually, however, when the inside electrolyte that leaks of lithium cell, interior pressure is great, the sealing washer is difficult to carry out effectual shutoff to the electrolyte of leaking, electrolyte leakage to the external condition can appear still.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: in order to solve the problem that the sealing structure between the upper cover plate and the pole of the lithium battery in the prior art is difficult to effectively seal the electrolyte leaked inside the lithium battery, the upper cover plate structure of the lithium battery with high sealing efficiency is provided.

The utility model provides a technical scheme that its technical problem adopted is: an upper cover plate structure of a lithium battery with high-efficiency sealing comprises a cover plate, a pole, a ceramic sealing ring, a switching piece, an upper isolation ring and a lower isolation ring, wherein a central hole for the pole to pass through penetrates through the cover plate, the pole is inserted into the central hole, the ceramic sealing ring is sealed between the central hole and the pole, the inner peripheral surface of the ceramic sealing ring is attached to the outer peripheral surface of the pole, and the outer peripheral surface of the ceramic sealing ring is attached to the inner peripheral surface of the central hole;

the utility model discloses a high-voltage insulation terminal, including switching piece, last division ring, last connection wing.

Utilize in this scheme to form the buffer memory groove between switching piece and ceramic seal ring, an electrolyte and the gas that produces for storing the inside leakage of lithium cell, play the pressure release function, with this sealing requirement who reduces ceramic seal ring, ceramic seal ring's intensity is high simultaneously, the bearing capacity is strong, long service life is high, difficult emergence is out of shape, thereby the formation that realizes can stabilizing is sealed, prevent that the inside electrolyte of leaking of lithium cell from trickling to external, and the lower tie wing of connection piece can hold ceramic seal ring tightly, the stability of reinforcing structure.

Furthermore, the upper end of the outer peripheral surface of the pole extends outwards to form an annular bulge, the end surface of the top end of the ceramic sealing ring is provided with a sealing potting layer, the outer peripheral surface of the sealing potting layer is connected with the inner peripheral surface of the central hole, and the inner peripheral surface of the sealing potting layer is connected with the outer peripheral surface of the annular bulge; utilize sealed encapsulating layer to form the shutoff at ceramic seal ring's up end, can effectively improve sealed effect, simultaneously, the existence of buffer memory groove has also reduced the requirement to sealed encapsulating layer, the production of being convenient for.

Furthermore, the upper end of the ceramic sealing ring is welded and fixed with the annular bulge.

Further, the lower end of the ceramic sealing ring and the lower connecting wing are fixed in a welding mode.

Further, the connecting sheet is welded and fixed on the pole.

Furthermore, the peripheral surface of the switching piece is provided with a communicating hole communicated with the cache groove.

Further, the inner side of the upper surface of the lower isolation ring extends upwards to form a protruding part, and the protruding part is located between the inner circumferential surface of the lower connecting wing and the outer circumferential surface of the pole.

Further, the cover plate is an aluminum cover plate.

The utility model has the advantages that: the utility model discloses high-efficient sealed lithium cell upper cover plate structure utilizes and forms the buffer memory groove between switching piece and ceramic seal ring, a gas for storing the inside electrolyte of leaking of lithium cell and production, play the pressure release function, with this sealing requirement who reduces ceramic seal ring, ceramic seal ring's intensity is high simultaneously, bearing capacity is strong, long service life is high, difficult emergence is out of shape, thereby realize that formation that can be stable is sealed, prevent that the inside electrolyte of leaking of lithium cell from trickling to external, and the lower connection wing of connection piece can hold ceramic seal ring tightly, the stability of reinforcing structure.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic diagram of the structure of the upper cover plate of the high-efficiency sealed lithium battery of the present invention;

fig. 2 is the schematic diagram of the utility model discloses high-efficient sealed lithium cell upper cover plate structural installation in the casing upper end.

In the figure: 1. the utility model provides a sealed encapsulating layer, including apron, 101, centre bore, 2, utmost point post, 201, annular arch, 3, ceramic seal ring, 4, switching piece, 401, go up the connection wing, 402, connect the wing down, 5, go up the cage, 6, lower cage, 601, bulge, 7, connection piece, 8, sealed encapsulating layer, 9, buffer memory groove, 10, casing.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic drawings, which illustrate the basic structure of the invention only in a schematic way, and thus show only the components that are relevant to the invention, and the directions and references (e.g., upper, lower, left, right, etc.) may be used only to help describe the features in the drawings. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the claimed subject matter is defined only by the appended claims and equivalents thereof.

Example 1

As shown in fig. 1-2, an upper cover plate structure of a high-efficiency sealed lithium battery comprises a cover plate 1, a terminal post 2, a ceramic sealing ring 3, an adapter plate 4, an upper isolation ring 5 and a lower isolation ring 6, wherein a central hole 101 for the terminal post 2 to pass through is formed in the cover plate 1, the terminal post 2 is inserted into the central hole 101, the ceramic sealing ring 3 is sealed between the central hole 101 and the terminal post 2, the inner peripheral surface of the ceramic sealing ring 3 is attached to the outer peripheral surface of the terminal post 2, and the outer peripheral surface of the ceramic sealing ring 3 is attached to the inner peripheral surface of the central hole 101;

the upper end of switching piece 4 is outwards buckled and is had last connection wing 401, the lower extreme of switching piece 4 is inwards buckled and is had down connection wing 402, go up cage 5 and set up the lower surface at apron 1, it is located between cage 5 and the apron 1 to go up connection wing 401, the bottom mounting of 2 outer peripheral faces of utmost point post has connection piece 7, cage 6 is located the top of connection piece 7 down, it is located down between cage 6 and the ceramic seal ring 3 to connect wing 402 down, form buffer memory groove 9 between switching piece 4 and the ceramic seal ring 3.

The upper spacer 5 may be fixed to the lower surface of the cover plate 1 in this embodiment, or the upper spacer 5 may be interference-fitted with the interposer 4.

The upper end of the outer peripheral surface of the pole 2 extends outwards to form an annular bulge 201, the end face of the top end of the ceramic sealing ring 3 is provided with a sealing potting adhesive layer 8, the outer peripheral surface of the sealing potting adhesive layer 8 is connected with the inner peripheral surface of the central hole 101, and the inner peripheral surface of the sealing potting adhesive layer 8 is connected with the outer peripheral surface of the annular bulge 201; utilize sealed encapsulating layer 8 to form the shutoff at ceramic seal ring 3's up end, can effectively improve sealed effect, simultaneously, the existence of buffer memory groove 9 has also reduced the requirement to sealed encapsulating layer 8, the production of being convenient for.

The upper end of the ceramic sealing ring 3 is welded and fixed with the annular bulge 201.

The lower end of the ceramic sealing ring 3 is welded and fixed with the lower connecting wing 402.

The connecting sheet 7 is welded and fixed on the pole 2.

The peripheral surface of the adapter plate 4 is provided with a communicating hole communicated with the cache groove 9; so that the electrolyte leaked from the inside of the lithium battery enters the buffer tank 9 from the communication hole.

The inner side of the upper surface of the lower isolation ring 6 extends upwards to form a protruding part 601, and the protruding part 601 is located between the inner circumferential surface of the lower connecting wing 402 and the outer circumferential surface of the pole 2.

The cover plate 1 is an aluminum cover plate.

In the embodiment, the pole 2 is an aluminum-copper composite pole, the upper layer of the pole 2 is an aluminum layer, and the lower layer of the pole 2 is a copper layer; the conductivity of the pole 2 can be improved.

High-efficient sealed lithium cell upper cover plate structural mounting is in lithium cell casing 10's upper end in this embodiment, when the inside electrolyte seal structure of lithium cell became invalid, the buffer memory groove 9 can be entered into from the intercommunicating pore to the liquid of leakage, with the inside pressure of release lithium cell, thereby reduce ceramic seal ring 3's sealed requirement, ceramic seal ring 3's intensity is high simultaneously, bearing capacity is strong, long service life, be difficult for taking place to warp, and then the formation that realizes can be stable is sealed, prevent that the inside electrolyte that leaks of lithium cell from trickling to external, and the lower connection wing 402 of connection piece 7 can hold ceramic seal ring 3 tightly, strengthen structural stability.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The utility model provides a high-efficient sealed lithium cell upper cover plate structure which characterized in that: the sealing device comprises a cover plate (1), a pole (2), a ceramic sealing ring (3), an adapter plate (4), an upper isolation ring (5) and a lower isolation ring (6), wherein a center hole (101) for the pole (2) to penetrate through is formed in the cover plate (1), the pole (2) is inserted into the center hole (101), the ceramic sealing ring (3) is sealed between the center hole (101) and the pole (2), the inner peripheral surface of the ceramic sealing ring (3) is attached to the outer peripheral surface of the pole (2), and the outer peripheral surface of the ceramic sealing ring (3) is attached to the inner peripheral surface of the center hole (101);

the utility model discloses a novel connecting structure, including adapter plate (4), last connection wing (401) outwards buckle in the upper end of adapter plate (4), the lower extreme of adapter plate (4) inwards buckles and has lower connection wing (402), it sets up the lower surface at apron (1) to go up cage (5), it is located between cage (5) and apron (1) to go up connection wing (401), the bottom mounting of utmost point post (2) outer peripheral face has connection piece (7), cage (6) are located the top of connection piece (7) down, connection wing (402) are located down between cage (6) and ceramic seal ring (3) down, form buffer memory groove (9) between adapter plate (4) and ceramic seal ring (3).

2. The high efficiency hermetically sealed lithium battery top cover plate structure of claim 1, further comprising: the upper end of the outer peripheral surface of the pole (2) extends outwards to form an annular bulge (201), the top end face of the ceramic sealing ring (3) is provided with a sealing potting adhesive layer (8), the outer peripheral surface of the sealing potting adhesive layer (8) is connected with the inner peripheral surface of the central hole (101), and the inner peripheral surface of the sealing potting adhesive layer (8) is connected with the outer peripheral surface of the annular bulge (201).

3. The high efficiency hermetically sealed lithium battery top cover plate structure of claim 2, wherein: the upper end of the ceramic sealing ring (3) is welded and fixed with the annular bulge (201).

4. The high efficiency hermetically sealed lithium battery top cover plate structure of claim 1, further comprising: the lower end of the ceramic sealing ring (3) is welded and fixed with the lower connecting wing (402).

5. The high efficiency hermetically sealed lithium battery top cover plate structure of claim 1, further comprising: the connecting sheet (7) is welded and fixed on the pole (2).

6. The high efficiency hermetically sealed lithium battery top cover plate structure of claim 1, further comprising: the outer peripheral surface of the switching piece (4) is provided with a communicating hole communicated with the buffer groove (9).

7. The high efficiency hermetically sealed lithium battery top cover plate structure of claim 1, further comprising: the inner side of the upper surface of the lower isolation ring (6) extends upwards to form a protruding part (601), and the protruding part (601) is positioned between the inner circumferential surface of the lower connecting wing (402) and the outer circumferential surface of the pole (2).

8. The high efficiency hermetically sealed lithium battery top cover plate structure of claim 1, further comprising: the cover plate (1) is an aluminum cover plate.