阅读说明：本技术 高效密封的锂电池上盖板结构 (High-efficient sealed lithium cell upper cover plate structure ) 是由 支杰 刘元成 郝世洪 张纯辉 于 2020-12-19 设计创作，主要内容包括：本发明涉及锂电池技术领域,尤其是一种高效密封的锂电池上盖板结构,包括盖板、极柱、陶瓷密封环、转接片、上隔离圈和下隔离圈,盖板上贯穿有供极柱穿过的中心孔,陶瓷密封环密封在中心孔和极柱之间,陶瓷密封环的内周面和极柱的外周面贴合,陶瓷密封环的外周面和中心孔的内周面贴合；本发明利用在转接片与陶瓷密封环之间形成缓存槽,用于储存锂电池内部泄漏的电解液及产生的气体,起到泄压功能,以此降低陶瓷密封环的密封要求,同时陶瓷密封环的强度高,承压能力强,使用寿命高,不易发生变形,从而实现能够稳定的形成密封,防止锂电池内部泄漏的电解液流淌至外界,且连接片的下连接翼能够将陶瓷密封环抱紧,增强结构的稳定性。(The invention 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, a ceramic sealing ring, a switching piece, an upper isolating ring and a lower isolating ring, wherein a central hole for the pole to pass through penetrates through the cover plate; according to the invention, the buffer groove is formed between the adapter sheet and the ceramic sealing ring and is used for storing electrolyte leaked from the inside of the lithium battery and generated gas, so that the pressure relief function is realized, the sealing requirement of the ceramic sealing ring is reduced, meanwhile, the ceramic sealing ring has high strength, strong bearing capacity and long service life, and is not easy to deform, so that stable sealing can be realized, the electrolyte leaked from the inside of the lithium battery is prevented from flowing to the outside, the ceramic sealing ring can be tightly held by the lower connecting wing of the connecting sheet, and the stability of the structure is enhanced.)

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.

Technical Field

The invention relates to the technical field of lithium batteries, in particular to an efficient and sealed upper cover plate structure of a lithium battery.

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.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: 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 technical scheme adopted by the invention for solving the technical problems is as follows: 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 invention has the beneficial effects that: according to the efficient-sealing upper cover plate structure of the lithium battery, the buffer groove is formed between the adapter sheet and the ceramic sealing ring and used for storing electrolyte leaked from the inside of the lithium battery and generated gas, so that the pressure relief function is achieved, the sealing requirement of the ceramic sealing ring is lowered, meanwhile, the ceramic sealing ring is high in strength, strong in bearing capacity, long in service life and not prone to deformation, sealing can be stably formed, the electrolyte leaked from the inside of the lithium battery is prevented from flowing to the outside, the ceramic sealing ring can be tightly held by the lower connecting wing of the connecting sheet, and the stability of the structure is enhanced.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic diagram of the construction of an upper cover plate for a lithium battery that is efficiently sealed according to the present invention;

fig. 2 is a schematic view showing the structure of the upper cap plate for a lithium battery of the present invention mounted on the upper end of a case in which the structure is highly hermetically sealed.

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 diagrams illustrating the basic structure of the present invention only in a schematic manner, and thus show only the constitution related to the present invention, and directions and references (e.g., upper, lower, left, right, etc.) may be used only to help the description of 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 description of the preferred embodiment of the present invention, it is to be understood that numerous changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. 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.