CN216720000U

CN216720000U - Sealing structure of zinc-manganese dry battery

Info

Publication number: CN216720000U
Application number: CN202220242937.XU
Authority: CN
Inventors: 沈桂中
Original assignee: Cixi Xuwei Electronic Co ltd
Current assignee: Cixi Xuwei Electronic Co ltd
Priority date: 2022-01-28
Filing date: 2022-01-28
Publication date: 2022-06-10
Anticipated expiration: 2032-01-28

Abstract

The utility model provides a zinc-manganese dry battery's seal structure, including the steel casing, this steel casing is the tube-shape and encircles and enclose into a holding chamber that is used for storing electrolyte, the both ends of steel casing have positive pole end cover and negative pole end cover, the holding intracavity is equipped with the graphite conductor with the electrolyte contact, and set up the insulating seal ring near negative pole end cover department, go out explosion-proof breakthrough area through the attenuate processing shaping on the insulating seal ring, the exhaust hole has been seted up on the negative pole end cover, be equipped with explosion-proof filler between negative pole end cover and the insulating seal ring, exhaust passage has been seted up on the explosion-proof filler, exhaust passage's head end and explosion-proof breakthrough area butt joint, exhaust passage's end and exhaust hole intercommunication. The utility model discloses be provided with exhaust passage, break the back at explosion-proof breakthrough area, can lead and make it discharge through terminal exhaust hole to the inside gas of high pressure, simultaneously because exhaust passage's existence, battery liquid also can only be along the exhaust passage runner, plays the effect that prevents the indiscriminate spattering of battery liquid.

Description

Sealing structure of zinc-manganese dry battery

Technical Field

The utility model belongs to the technical field of the technique of dry battery and specifically relates to a seal structure of zinc-manganese dry battery.

Background

The alkaline battery is also called an alkaline dry battery, an alkaline zinc-manganese battery and an alkaline manganese battery, and is a variety with the best performance in a zinc-manganese battery series. Is suitable for long-term use with large discharge capacity. The battery has lower internal resistance, so the generated current is larger than that of the common carbon battery, and the battery does not contain mercury, so the battery can be treated with the household garbage and does not need to be recycled intentionally. The alkaline battery is structurally applied to the opposite electrode structure of a common battery, the relative area between a positive electrode and a negative electrode is increased, a high-conductivity potassium hydroxide solution is used for replacing ammonium chloride and zinc chloride solutions, negative electrode zinc is changed into particles from sheets, the reaction area of the negative electrode is increased, and high-performance electrolytic manganese powder is adopted, so that the electrical property is greatly improved.

For example, patent document CN202977598U discloses a battery current collector, an explosion-proof structure is arranged on a sealing ring, the explosion-proof structure is arranged at the root of the joint of an annular main body and a central column, the explosion-proof structure comprises an annular explosion-proof groove arranged on the outer side surface of the annular main body and a weak part formed on the annular main body, the opening of the annular explosion-proof groove faces to a negative electrode bottom cover, and the inner side surface of the annular main body is continuous and flat.

The products of the patents have certain explosion-proof performance, but certain defects are found in the actual use process. In short, the explosion-proof structure in the patented product is triggered and broken in the case of partial instability (high temperature, drop swing, etc.). However, a user cannot find that the battery shell is damaged at first time, so that the internal electrolyte leaks out, and the electrolyte is a corrosive alkaline substance potassium hydroxide and has irritation to eyes, respiratory tracts and skin; on the other hand, since the electrolyte also corrodes metals and damages electronic parts, the electrolyte leaked from the battery also damages products using the battery, particularly electronic products.

Therefore, there is a need for a sealing structure that eliminates or minimizes electrolyte leakage after the explosion-proof structure is triggered, to provide better safety performance.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model provides a sealing structure of a zinc-manganese dry battery

The technical proposal of the utility model for solving the technical problem is that: the utility model provides a sealing structure of zinc-manganese dry battery, includes the steel casing, this steel casing is the tube-shape and encircles and enclose into a holding chamber that is used for storing electrolyte, the both ends of steel casing have positive end cover and negative pole end cover, the holding intracavity be equipped with the graphite conductor of electrolyte contact and set up at the insulating seal ring who is close to negative pole end cover department, the insulating seal ring on go out explosion-proof breakthrough area through the attenuate processing shaping, the negative pole end cover on seted up the exhaust hole, negative pole end cover and insulating seal ring between be equipped with explosion-proof filler, explosion-proof filler on seted up exhaust passage, exhaust passage's head end with explosion-proof breakthrough area butt joint, exhaust passage's end and exhaust hole intercommunication.

The scheme is further provided as follows: and a plurality of adsorption flame-retardant particles are arranged in the exhaust channel.

The scheme is further set as follows: the exhaust channel is in a thread ascending shape and is arranged on the periphery of the explosion-proof filler.

The scheme is further provided as follows: the explosion-proof filler is a solid ceramic ring.

The scheme is further provided as follows: the steel shell, the insulating sealing ring and the negative end cover are riveted together in sequence from outside to inside.

The scheme is further set as follows: the exhaust passage in the stopper be equipped with the water conservancy diversion strip, the fire-retardant granule of absorption set up on the water conservancy diversion strip.

The scheme is further set as follows: the inner wall of one side of each flow guide strip is inwards convexly provided with a plurality of first flow guide ribs, the inner wall of the other side of each flow guide strip is inwards convexly provided with a plurality of second flow guide ribs, the first flow guide ribs and the second flow guide ribs are alternately arranged, and a passing gap is formed between every two adjacent first flow guide ribs and every two adjacent second flow guide ribs.

The scheme is further provided as follows: and a PH test paper is arranged at the exhaust hole.

The scheme is further provided as follows: the PH test paper is attached to the inner wall of the exhaust hole.

When the utility model is used, once high pressure is formed inside the steel shell and the explosion-proof breakthrough area is broken, gas generated by internal reaction can be discharged along the exhaust passage to discharge the pressure in time, thereby preventing the pressure from accumulating to cause the explosion of the battery; moreover, due to the existence of the exhaust channel, the battery liquid can only flow along the exhaust channel, and the function of preventing the battery liquid from splashing is achieved.

The beneficial effects of the utility model reside in that:

1. when the pressure in the battery shell is too high, the explosion-proof breakthrough area can be broken through, so that the pressure is relieved, and the function of preventing the battery from exploding is achieved; moreover, the exhaust channel is arranged, after the explosion-proof breakthrough area is broken, high-pressure internal gas can be guided and exhausted through the exhaust hole at the tail end, and meanwhile, due to the existence of the exhaust channel, the battery liquid can only flow along the exhaust channel, so that the function of preventing the battery liquid from splashing randomly is achieved.

2. Be provided with and adsorb fire-retardant granule, can break the back at explosion-proof breakthrough area, play better heat absorption, fire-retardant effect, with internal pressure effective control, the condition of greatly reduced battery detonation, and then promote holistic security.

3. The exhaust passage adopts the shape of spiral rising form, can have longer channel length, under the circumstances that guarantees that gas can smoothly pass through, increases the battery liquid and flows and the degree of difficulty that leaks outward to reach better security.

4. Be provided with the PH test paper, when taking place to leak, the PH test paper can react and produce the colour change rather than taking place promptly, can judge when the user observes the PH test paper and take place the colour after that the department has had battery liquid to spill to in time dispose the trouble battery, prevent the emergence of more serious consequence, use safe and reliable more.

Drawings

Fig. 1 is a schematic half-section view of the present invention.

Fig. 2 is a partial schematic view of the explosion-proof breakthrough area of the present invention.

Fig. 3 is a schematic structural diagram of the explosion-proof filler of the present invention.

Fig. 4 is a partial schematic view of the middle flow guide strip of the present invention.

Fig. 5 is a schematic structural view of the exhaust hole of the present invention.

Fig. 6 is a schematic structural view of the middle insulating sealing ring of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 to 6, a sealing structure of a zinc-manganese dry battery comprises a steel shell 1, wherein the steel shell 1 is cylindrical and surrounds to form a containing cavity 2 for storing electrolyte, an anode end cover 3 and a cathode end cover 4 are arranged at two ends of the steel shell 1, a graphite conductor 5 contacting with the electrolyte and an insulating sealing ring 6 arranged at a position close to the cathode end cover 4 are arranged in the containing cavity 2, an explosion-proof breakthrough area 7 is formed on the insulating sealing ring 6 through thinning processing, an exhaust hole 8 is formed in the cathode end cover 4, an explosion-proof filler 9 is arranged between the cathode end cover 4 and the insulating sealing ring 6, an exhaust passage 10 is formed in the explosion-proof filler 9, the head end of the exhaust passage 10 is butted with the explosion-proof breakthrough area 7, and the tail end of the exhaust passage 10 is communicated with the exhaust hole 8.

The above is the basic scheme of the present invention, referring to fig. 2, it is provided with an explosion-proof breakthrough region 7, when the pressure inside the battery steel casing 1 is too high, the explosion-proof breakthrough region 7 can be breached, so as to remove the pressure, so as to achieve the function of preventing the battery from exploding; moreover, an exhaust channel 10 is arranged, after the explosion-proof breakthrough area 7 is broken, high-pressure internal gas can be guided and exhausted through an exhaust hole 8 at the tail end, and meanwhile, due to the existence of the exhaust channel 10, the battery liquid can only flow along the exhaust channel 10, so that the function of preventing the battery liquid from splashing randomly is achieved.

Preferably, referring to fig. 3, a plurality of adsorption flame retardant particles 11 are disposed in the exhaust passage 10. The adsorption flame retardant particles 11 may be nylon particles/phosphorus flame retardant particles, and the like, and are not particularly limited herein. Adsorb fire-retardant granule 11 can break the back at explosion-proof breakthrough area 7, play better heat absorption, fire-retardant effect, with internal pressure effective control, the condition of greatly reduced battery detonation, and then promote holistic security.

With respect to the above-mentioned solution, with reference to fig. 3, the vent passage 10 is formed in a screw-up shape and is provided on the outer circumference of the explosion-proof packing 9. The exhaust passage 10 is in a spiral rising shape, so that the length of the passage can be longer, and the difficulty of flowing and leaking of battery liquid is increased under the condition that gas can smoothly pass through the exhaust passage, so that better safety is achieved.

According to research and test tests on various material properties, the industrial ceramic is found to be a material with good rigidity and high hardness in engineering materials, and has higher compressive strength; excellent chemical stability at high temperatures, ceramics having lower thermal conductivity than metallic materials; the ceramic is a good heat insulation material, and when the temperature changes, the ceramic has good dimensional stability; has the advantages of good electrical insulation and the like, and is extremely suitable for being used in battery products. Therefore, in some preferred embodiments of the present invention, the explosion-proof filler 9 is a solid ceramic ring 12.

About the utility model discloses the connection and mounting structure of relevant part are preferred: the steel shell 1, the insulating sealing ring 6 and the negative end cover 4 are riveted together in sequence from outside to inside.

In this embodiment, referring to fig. 4, the exhaust passage 10 is internally plugged with a flow guide strip 13, the adsorption flame retardant particles 11 are disposed on the flow guide strip 13, and the arrangement of the flow guide strip 13 can further enhance the function of guiding substances passing through the exhaust passage 10. Meanwhile, the diversion strips 13 and the exhaust channel 10 are assembled after being formed in a split mode, so that the process difficulty of production and processing can be reduced, the qualification rate of products is improved, and the production cost is reduced; on the other hand, after the battery is used, all parts in the battery can be recycled, and the exhaust channel 10 or/and the flow guide strip 13 meeting the use standard can be repeatedly utilized, so that the economic benefit is improved, and the battery is more environment-friendly.

Further, in the above, a plurality of first flow guiding ribs 14 are convexly provided on an inner wall of one side of the flow guiding strip 13, a plurality of second flow guiding ribs 15 are convexly provided on an inner wall of the other side of the flow guiding strip 13, the first flow guiding ribs 14 and the second flow guiding ribs 15 are alternately arranged, and a passing gap 16 is formed between the adjacent first flow guiding ribs 14 and the adjacent second flow guiding ribs 15. Through the arrangement of the first flow guide ribs 14 and the second flow guide ribs 15, the exhaust channel 10 can be more complicated, so that the difficulty of leakage of the battery liquid is increased, and the probability of the battery liquid flowing out is further reduced; meanwhile, a front and rear uninterrupted passing gap 16 is formed to ensure smooth passage of gas.

When the battery fluid leaks slightly, the user is likely to fail to observe the leakage signs, which leads to continued use, and further serious consequences such as harm to human bodies, corrosion of metals, destruction of electronic parts, and the like. In order to solve the above-mentioned defects, referring to fig. 5, a PH test paper 17 is disposed at the exhaust hole 8. According to the acid-base characteristic of electrolyte, when leaking, PH test paper 17 can react with it and produce the colour change promptly, can judge that there is battery liquid to spill after the user observes PH test paper 17 to take place the colour, in order in time to dispose the trouble battery, prevent the emergence of more serious consequence, use safe and reliable more.

The scheme is further provided as follows: the PH paper 17 is attached to the inner wall of the exhaust hole 8 so that a user can observe the PH paper more easily, and the PH paper 17 is more easily installed in the manufacturing process.

The above, only be the preferred embodiment of the utility model, it is not right the utility model discloses do any restriction, all according to utility model technical substance to any simple modification, change and the equivalent structure change of doing of above embodiment, all still belong to the utility model discloses technical scheme's within the scope of protection.

Claims

1. The utility model provides a zinc-manganese dioxide dry battery's seal structure, includes the steel casing, this steel casing is the tube-shape and encircles and enclose into a holding chamber that is used for storing electrolyte, the both ends of steel casing have anodal end cover and negative pole end cover, the holding intracavity be equipped with the graphite conductor of electrolyte contact and set up the insulating seal ring near negative pole end cover department, the insulating seal ring on go out explosion-proof breakthrough district, its characterized in that through the attenuate processing shaping: the negative electrode end cover is provided with an exhaust hole, an explosion-proof filler is arranged between the negative electrode end cover and the insulating sealing ring, an exhaust channel is arranged on the explosion-proof filler, the head end of the exhaust channel is in butt joint with the explosion-proof breakthrough area, and the tail end of the exhaust channel is communicated with the exhaust hole.

2. A sealing structure of a zinc-manganese dry battery according to claim 1, characterized in that: and a plurality of adsorption flame-retardant particles are arranged in the exhaust passage.

3. A sealing structure of a zinc-manganese dry battery according to claim 1, characterized in that: the exhaust passage is in a thread ascending shape and is arranged on the periphery of the explosion-proof filler.

4. A sealing structure of a zinc-manganese dry battery according to claim 1, characterized in that: the explosion-proof filler is a solid ceramic ring.

5. A sealing structure of a zinc-manganese dry battery according to claim 1, characterized in that: the steel shell, the insulating sealing ring and the negative end cover are riveted together in sequence from outside to inside.

6. A sealing structure of a zinc-manganese dry battery according to claim 2, characterized in that: the exhaust passage in the stopper be equipped with the water conservancy diversion strip, the fire-retardant granule of absorption set up on the water conservancy diversion strip.

7. A sealing structure of a zinc-manganese dry battery according to claim 6, characterized in that: the inner wall of one side of each flow guide strip is inwards convexly provided with a plurality of first flow guide ribs, the inner wall of the other side of each flow guide strip is inwards convexly provided with a plurality of second flow guide ribs, the first flow guide ribs and the second flow guide ribs are alternately arranged, and a passing gap is formed between every two adjacent first flow guide ribs and every two adjacent second flow guide ribs.

8. A sealing structure of a zinc-manganese dry battery according to claim 1, characterized in that: and a PH test paper is arranged at the exhaust hole.

9. A sealing structure of a zinc-manganese dry battery according to claim 8, characterized in that: the PH test paper is attached to the inner wall of the exhaust hole.