CN201323213Y - Nickel-hydrogen battery pressure safety valve - Google Patents

Abstract

The utility model discloses a nickel-hydrogen battery pressure safety valve, which comprises an air plug upper body and an air plug lower body. The air plug upper body is inserted into the air plug lower body. An insertion hole is arranged in the air plug upper body and a rubber column is inserted into the insertion hole. A stepped end face is arranged at the opening of the insertion hole. An air overflow hole is arranged at the non-insertion end of the air plug lower body and communicated with the insertion hole. A ventilation hole is arranged in the air plug upper body. A step is arranged at the insertion end of the air plug upper body and respectively leans against the end face of the rubber column and the stepped end face of the air plug lower body. The utility model has the advantages that a plurality of traditional parts are simplified and reconstructed, the rubber structure is used, the internal pressure of the battery is controlled more accurately, air can be exhausted quickly when the internal pressure of the battery reaches a certain pressure value, battery explosion is effectively avoided, the safety performance of the battery is greatly improved, the production cost is reduced and the battery weight is decreased.

Description

A kind of Ni-MH battery air pressure safety valve

Technical field

The utility model belongs to the battery design field, is specifically related to a kind of battery air pressure safety valve.

Background technology

Traditional Ni-MH battery air pressure safety valve substantially all is to adopt the simple metal material.In the textural more complicated of air pressure safety valve, parts are more, assemble by multiple widget.Its product assembling procedure and complexity thereof, aspect the control of battery air pressure since be metal be main and assembling complicated, so accuracy is very low.And air pressure safety valve metal is many, has increased battery weight, the production cost height, and Practical Performance is not good, has lowered the service efficiency of Ni-MH battery greatly, and air valve lost efficacy and the battery explosion probability that causes is higher.

Also have some enterprises or mechanism to attempt adopting other material to replace metal on its safety valve, reducing production costs, but since technical reason often production cost and these two key issues of result of use of battery air pressure safety valve can not be resolved.It is not enough safety valve air pressure control accuracy usually to occur, and the battery internal gas pressure is higher can not in time be got rid of gas and cause phenomenons such as battery explosion, and its trial all ends in failure.

Summary of the invention

The purpose of this utility model is in order to reduce the production cost of Ni-MH battery safety valve, to promote the air pressure control accuracy, improving battery service efficiency and usage safety performance.By changing conventional security valve constitution principle technically, while bond material pressure control principle, utilization plastic, rubbers etc. are as the safety valve manufactured materials, bond pressure theory of science is designed rational safety valve structure pattern, perfectly the battery service efficiency is combined------Ni-MH battery air pressure safety valve of having developed this new product with reducing production costs.

The technical solution of the utility model is:

A kind of Ni-MH battery air pressure safety valve, comprise vent plug upper body (1) and vent plug lower body (2), insert in the vent plug lower body (2) vent plug upper body (1), be provided with the jack (5) that inserts rubber column (3) in the described vent plug lower body (2), be provided with step-like end face at described jack (5) opening part, be provided with the air leakage hole (6) that communicates with jack (5) in the non-insertion end of vent plug lower body (2); Be provided with air vent hole (4) in the described vent plug upper body (1), the insertion end of vent plug upper body (1) also is respectively equipped with and the end face of rubber column (3) and the step that the step-like end face on the vent plug lower body (2) offsets; Wherein the diameter of rubber column (3) is not more than the internal diameter of the jack (5) in the vent plug lower body (2), and its both ends of the surface offset with air leakage hole (6) and air vent hole (4) respectively.

Wherein vent plug upper body and vent plug lower body are plastic material.The cross section of rubber column is circle or polygon; When the diameter of rubber column was identical with the jack internal diameter, the cross section of rubber column was a polygon, as octagon, hexagon, pentagon etc., as long as can support air leakage hole last and reserve gas passage in jack; And when the diameter of rubber column during less than the jack internal diameter, as long as rubber column can reach above-mentioned requirements, its cross section can adopt various ways such as circle or polygon.

The insertion end of vent plug lower body can also be provided with annular boss, and this annular boss can be connected the vent plug upper body with the vent plug lower body around the side of the insertion end of vent plug upper body tightr, more attractive in appearancely.

The vent plug lower body inserts inside battery, and the non-insertion end of vent plug upper body communicates with the external world.When cell internal pressure just often, rubber column is against on the air leakage hole, and battery is constituted sealing.When cell internal pressure surpasses rated pressure, between air leakage hole and the rubber column elastic deformation taking place, thereby forms gas vent, gas is by this outlet, and the crack, limit between rubber column and jack leaks in the air vent hole of vent plug upper body, discharges outside the battery.The rubber column end face did not support the air vent hole of vent plug upper body when last fully, gas in the battery can directly be discharged, and when the rubber column end face supports the air vent hole of last vent plug upper body, because the deformation that rubber or plastics take place under pressure also can produce gas vent, thereby gas is discharged.The present invention controls the folding of safety valve by the elastic deformation of rubber or plastics, can significantly promote the accuracy of air pressure control.

The beneficial effects of the utility model:

1, traditional a plurality of parts is simplified transformation.The apply materials advantage adopts composite plastic for chief commander's structural texture is condensed into an integral body, makes its structure more simple.

2, adopt bottom six diamond patterns (or cylinder and other multi-faceted column) structure of elastomeric material, strengthened the accuracy of control inside battery air pressure, when inside battery air pressure reaches certain force value, can rapidly gas be discharged, effectively prevent battery explosion phenomenon, battery safety is improved greatly.

3, utilization plastic, rubber material replaces traditional metal, lowers production cost, alleviates battery weight.

Control plurality of advantages such as the structural texture of degassing function and refining and low production cost accurately because this safety valve manufacturing technology has had both safety valve, therefore make air pressure safety valve that the unique manufacture of this utilization designs will promote rapidly and use in the production process of Ni-MH battery afterwards.It will have the vast market space in the coming years.

Description of drawings

Fig. 1 is the rubber column schematic perspective view;

Fig. 2 is a vent plug lower body schematic perspective view;

Fig. 3 is a vent plug upper body schematic perspective view;

Fig. 4 is a safety valve stereoscopic schematic diagram;

Fig. 5 is a safety valve assembling schematic diagram.

Embodiment

Below in conjunction with drawings and Examples the utility model is further described.

As shown in the figure, be provided with the air vent hole 4 that connects vent plug upper body 1 both ends of the surface in the vent plug upper body 1 of Ni-MH battery air pressure safety valve, the insertion end in vent plug upper body 1 is provided with step.Be provided with jack 5 in the vent plug lower body 2, insert rubber column 3 in the jack 5, the non-insertion end of vent plug lower body 2 is provided with the air leakage hole 6 that communicates with jack 5, and air leakage hole 6 is offseted by the lower surface of rubber column 3; The insertion end of vent plug lower body 2 (being the openend of jack 5) is provided with step-like end face, and the step on this step-like end face and the vent plug upper body 1 is corresponding, promptly the step on the vent plug upper body 1 just and the upper surface of rubber column 3 and the step-like end face of vent plug lower body 2 offset.Wherein the upper surface of rubber column 3 also with vent plug upper body 1 on air vent hole 4 offset.

Periphery at the step-like end face of vent plug lower body 2 is provided with an annular boss, is centered around on the side of insertion end of vent plug upper body 1.Wherein vent plug upper body 1 and vent plug lower body 2 all use plastic material.

When the internal diameter of the diameter of rubber column 3 and jack 5 was identical, rubber column 3 can adopt the form (being that cross section is a polygon) of polygon prism, thereby reserves gas passage between rubber column 3 and jack 5; And when the diameter of rubber column 3 during less than jack 5 internal diameters, that rubber column 3 can adopt is cylindrical, polygon prism or reeded cylinder or prismatic form, as long as can support air leakage hole 6 last and reserve gas passage.

Vent plug lower body 2 inserts inside battery, and the air vent hole of the non-insertion end of vent plug upper body 1 communicates with the external world.When cell internal pressure just often, rubber column 3 is against on the air leakage hole 6, and battery is constituted sealing.When cell internal pressure surpasses rated pressure, between air leakage hole 6 and the rubber column 3 elastic deformation takes place, thereby form gas vent, gas is by this outlet, gas passage between rubber column 3 and jack 5 leaks in the air vent hole 4 of vent plug upper body 1, discharges outside the battery.Rubber column 3 end faces did not support the air vent hole 4 of vent plug upper body 1 when last fully, gas in the battery can directly be discharged, and when rubber column 3 end faces support the air vent hole 4 of last vent plug upper body 1, because the deformation that rubber or plastics take place under pressure also can produce gas vent, thereby gas is discharged.The present invention can accurately control the folding of safety valve by measuring the elastic deformation degree between rubber column and each pore.

Claims (3)

1, a kind of Ni-MH battery air pressure safety valve, comprise vent plug upper body (1) and vent plug lower body (2), insert in the vent plug lower body (2) vent plug upper body (1), it is characterized in that being provided with in the described vent plug lower body (2) jack (5) that inserts rubber column (3), be provided with step-like end face at described jack (5) opening part, be provided with the air leakage hole (6) that communicates with jack (5) in the non-insertion end of vent plug lower body (2); Be provided with air vent hole (4) in the described vent plug upper body (1), the insertion end of vent plug upper body (1) also is respectively equipped with and the end face of rubber column (3) and the step that the step-like end face on the vent plug lower body (2) offsets; Wherein the diameter of rubber column (3) is not more than the internal diameter of the jack (5) in the vent plug lower body (2), and its both ends of the surface offset with air leakage hole (6) and air vent hole (4) respectively.

2, Ni-MH battery air pressure safety valve according to claim 1 is characterized in that vent plug upper body (1) and vent plug lower body (2) are plastic material.

3, Ni-MH battery air pressure safety valve according to claim 1, the cross section that it is characterized in that rubber column (3) is circle or polygon.

Images