CN214672775U - Battery explosion-proof structure - Google Patents

Abstract

The utility model provides a battery explosion-proof structure belongs to battery technical field, include: supplementary lid and sealing washer, supplementary lid with the sealing washer is connected, supplementary lid is provided with thorn body and bleeder vent, the sealing washer is provided with and is used for the orientation supplementary lid direction expanded deformation portion works as when deformation portion expands the thorn body is used for stabbing deformation portion, the bleeder vent is used for the confession gas to pass through supplementary lid. The utility model has the advantages that: the explosion-proof structure can greatly reduce the dependence on the precision of the explosion-proof groove of the sealing ring, reduce the production difficulty and cost, and simultaneously has better explosion-proof performance and better leakage-proof performance.

Description

Battery explosion-proof structure

Technical Field

The utility model belongs to the technical field of the battery, a battery explosion-proof structure is related to.

Background

The production precision of the sealing ring determines the safety performance of the alkaline battery, and in the normal safety performance test, a large amount of gas generated inside the battery is filled in an air chamber of the battery to cause the deformation of the sealing ring, and at the moment, an explosion-proof groove specially designed in the sealing ring is broken due to the weak pressure, so that the internal pressure is released, and the explosion phenomenon is not generated. The structure is a popular explosion-proof structure at present, and has very strict requirements on the production of the sealing ring.

The sealing ring production technology mastered at present has strict requirements on the sealing ring production process, and in the aspects of leakage prevention and safety performance test, partial parameters of the sealing ring are required to be controlled within a very small range, so that the precision requirement of the sealing ring is the highest requirement in all battery accessories.

In the existing battery structure, the thickness of the sealing ring explosion-proof groove is contradictory to the leakage-proof performance and the safety performance, if the thickness of the explosion-proof groove is increased, the leakage-proof performance is improved, but hidden danger is brought to the safety performance, so that the leakage-proof performance cannot be improved.

Disclosure of Invention

The utility model aims at the above-mentioned problem that prior art exists, a battery explosion-proof construction is proposed.

The purpose of the utility model can be realized by the following technical proposal: a battery explosion-proof structure comprising: supplementary lid and sealing washer, supplementary lid with the sealing washer is connected, supplementary lid is provided with thorn body and bleeder vent, the sealing washer is provided with and is used for the orientation supplementary lid direction expanded deformation portion works as when deformation portion expands the thorn body is used for stabbing deformation portion, the bleeder vent is used for the confession gas to pass through supplementary lid.

Preferably, the edge of the sealing ring is provided with an annular sealing part, and the annular sealing part is connected with the edge of the auxiliary cover body.

Preferably, the auxiliary cover body is provided with an annular accommodating cavity, the deformation part is of an annular structure, the thorn body is located in the annular accommodating cavity, and the deformation part can expand towards the annular accommodating cavity.

Preferably, a bending transition part is formed between the annular sealing part and the deformation part.

Preferably, the number of the thorn bodies is multiple and is arranged in a ring shape.

Preferably, the auxiliary cover body is provided with a turnover angle turned towards the direction of the sealing ring, the thorn body is positioned at the tip end of the turnover angle, and the vent holes are formed in the auxiliary cover body after the turnover angle is turned over.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the explosion-proof structure can greatly reduce the dependence on the precision of the explosion-proof groove of the sealing ring, reduce the production difficulty and cost, and simultaneously has better explosion-proof performance and better leakage-proof performance.

2. The annular seal portion can seal the seal ring against the battery case, and can also maintain the seal between the seal ring and the auxiliary lid body.

3. In the actual structure, the number of the puncture bodies can be four, and the puncture bodies are arranged in a ring shape, so that when the deformation part expands, the multiple puncture bodies can puncture at different positions of the deformation part, and the reliability in puncturing is ensured.

Drawings

Fig. 1 is a schematic diagram of the battery explosion-proof structure of the present invention.

Fig. 2 is a schematic view of the state of the deformation part when the deformation part is expanded.

Fig. 3 is a schematic view of the state of the puncture body piercing the deformation portion.

Fig. 4 is a top view of the auxiliary lid of the present invention.

Fig. 5 is a schematic structural view of the auxiliary cover of the present invention.

In the figure, 100, an auxiliary cover; 110. a thorn body; 120. air holes are formed; 130. an annular receiving cavity; 140. turning over a folded angle; 200. a seal ring; 210. a deformation section; 220. an annular seal portion; 230. and bending the transition part.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1, 2, 3, 4, and 5, a battery explosion-proof structure includes: the auxiliary cover body 100 is connected with the sealing ring 200, and the explosion-proof structure is matched with the sealing ring 200 through the auxiliary cover body 100, so that when a large amount of gas is generated in the battery and fills the air chamber of the battery, the sealing ring 200 is actively punctured, and the gas is exhausted; the explosion-proof structure does not rely on the self-rupture of the sealing ring 200, but expands a specific portion of the sealing ring 200 to a certain extent, and then punctures the sealing ring 200 through the auxiliary cover body 100, thus not relying on the self-rupture of the sealing ring 200.

The auxiliary cover body 100 is provided with a thorn body 110 and a vent hole 120, the thorn body 110 is actually a sharp structure on the auxiliary cover body 100 facing the sealing ring 200, and the vent hole 120 is an air hole formed on the auxiliary cover body 100.

The sealing ring 200 is provided with a deformation portion 210 for expanding toward the auxiliary cover body 100, when the deformation portion 210 expands, the puncture body 110 is used for puncturing the deformation portion 210, and the ventilation holes 120 are used for allowing gas to pass through the auxiliary cover body 100.

Preferably, when a large amount of gas generated inside the battery is filled in the air chamber of the battery, the gas pushes the deformation part 210 from below the deformation part 210, so that the deformation part 210 expands and deforms toward the auxiliary cover 100, and when it deforms to a certain extent, it touches the puncture body 110, so that the puncture body 110 punctures the deformation part 210, and then the gas inside the battery passes through the vent holes 120 through the ruptured deformation part 210, so that the gas is discharged from the sealing ring 200 and the auxiliary cover 100.

The sealing ring 200 is the highest precision requirement among all battery accessories, when the safety performance of the battery is unqualified, the battery needs to be isolated for at least 6 months, and when the parameters of the sealing ring 200 are traced, all the parameters are in a specified range, the equipment is difficult to adjust timely, meanwhile, the production influence of the sealing ring 200 affects the next production process, which brings great troubles to the production continuity of enterprises and increases the operation cost. In general, the precision control of the seal ring 200 is very demanding, and a large number of monitoring means are required to manage the production process.

In the present embodiment, the specially designed auxiliary cover body 100 is used to actively puncture the deformation portion 210, instead of the original function of the explosion-proof groove of the sealing ring 200, so that the dependence on the precision of the explosion-proof groove of the sealing ring 200 can be greatly reduced, the production difficulty and the cost can be reduced, and the explosion-proof structure has better explosion-proof performance and better leakage-proof performance.

As shown in fig. 1, 2 and 3, in addition to the above embodiment, an annular sealing portion 220 is provided at the edge of the sealing ring 200, and the annular sealing portion 220 is connected to the edge of the auxiliary lid body 100.

Preferably, the ring-shaped sealing portion 220 can seal the seal ring 200 and the battery case together, and can also seal the seal ring 200 and the auxiliary lid body 100 together, so that the seal ring 200 can seal the battery case, and can also maintain the seal between the seal ring 200 and the auxiliary lid body 100.

In a practical structure, the annular sealing portion 220 is a flange structure turned up toward the auxiliary lid body 100, and is tightly attached to the auxiliary lid body 100.

As shown in fig. 1, 2, 3, 4, and 5, in addition to the above embodiment, the auxiliary cover body 100 is provided with an annular accommodating cavity 130, and the deformation portion 210 is an annular structure, the thorn body 110 is located in the annular accommodating cavity 130, and the deformation portion 210 can expand toward the annular accommodating cavity 130.

Preferably, the annular accommodating chamber 130 can provide a space for the deformation and expansion of the deformation portion 210, when no gas is generated in the battery, a certain distance is provided between the puncture body 110 and the deformation portion 210 in the annular accommodating chamber 130, when gas is generated in the battery, the deformation portion 210 can expand towards the annular accommodating chamber 130, and when the gas is expanded to a certain extent, the deformation portion 210 can touch the puncture body 110, thereby actively puncturing the sealing ring 200 to release the gas.

As shown in fig. 1, 2, 3, 4 and 5, in addition to the above embodiment, a bent transition portion 230 is formed between the annular sealing portion 220 and the deformation portion 210.

Preferably, the bending transition portion 230 is an annular portion between the annular sealing portion 220 and the deformation portion 210, wherein the annular sealing portion 220 cannot be deformed, and the deformation portion 210 has a characteristic of easy deformation, that is, the deformation portion 210 is relatively thin, and the annular transition portion can separate the annular sealing portion 220 from the deformation portion 210, so that the annular sealing portion 220 is not affected by the deformation portion 210.

As shown in fig. 1, 4 and 5, in the above embodiment, the number of the spinous bodies 110 is plural and arranged in a ring shape. In an actual structure, the number of the pricking bodies 110 may be four, and the pricking bodies 110 are arranged in a ring shape, so that when the deformation portion 210 expands, the pricking bodies 110 can prick different positions of the deformation portion 210, thereby ensuring reliability in pricking and pricking the sealing ring 200 with a plurality of lacerations.

As shown in fig. 1, 2, 3, 4 and 5, in addition to the above embodiment, the auxiliary lid 100 is formed with a folding angle 140 folded toward the sealing ring 200, the thorn 110 is located at the tip of the folding angle 140, and the ventilation hole 120 is formed in the auxiliary lid 100 after the folding angle 140 is folded.

Preferably, in order to facilitate the processing of the auxiliary lid 100, the auxiliary lid 100 is provided with the folded-back corner 140 at a portion corresponding to the annular sealing portion 220, and the folded-back corner 140 is folded back toward the sealing ring 200, so that the ventilation holes 120 can be formed in the auxiliary lid 100, and the sharp end of the folded-back corner 140 is the thorn body 110, so that the auxiliary lid 100 is simply punched out with several folded-back corners 140 during the processing.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

Furthermore, the descriptions in the present application as to "first," "second," "a," etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating a number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, the technical solutions between the embodiments of the present invention can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are contradictory or cannot be realized, the combination of such technical solutions should be considered to be absent, and is not within the protection scope of the present invention.

Claims (6)

1. A battery explosion-proof structure, comprising: supplementary lid and sealing washer, supplementary lid with the sealing washer is connected, supplementary lid is provided with thorn body and bleeder vent, the sealing washer is provided with and is used for the orientation supplementary lid direction expanded deformation portion works as when deformation portion expands the thorn body is used for stabbing deformation portion, the bleeder vent is used for the confession gas to pass through supplementary lid.

2. A battery explosion-proof structure as set forth in claim 1, wherein: the edge of sealing washer is provided with annular seal portion, annular seal portion with the edge connection of supplementary lid.

3. A battery explosion-proof structure as set forth in claim 2, wherein: the auxiliary cover body is provided with an annular accommodating cavity, the deformation part is of an annular structure, the thorn body is located in the annular accommodating cavity, and the deformation part can face the annular accommodating cavity to expand.

4. A battery explosion-proof structure as set forth in claim 3, wherein: and a bending transition part is formed between the annular sealing part and the deformation part.

5. A battery explosion-proof structure as set forth in claim 3, wherein: the number of the thorn bodies is a plurality and the thorn bodies are arranged in a ring shape.

6. A battery explosion-proof structure as set forth in claim 1, wherein: the auxiliary cover body is provided with a turnover angle turned towards the direction of the sealing ring, the thorn body is positioned at the tip end of the turnover angle, and the vent holes are formed in the auxiliary cover body after the turnover angle is turned over.

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