Leakproof sealant for nickel-hydrogen battery and manufacturing method thereof

Abstract

The invention provides a leakproof sealant for a nickel-hydrogen battery. The leakproof sealant comprises the following ingredients (by weight): 15-20 parts of silicone rubber, 10-15 parts of olefin resin, 83-92 parts of a reactive diluent, 3-5 parts of an acidic regulator and 0.5-3.5 parts of an obstruction filler. The diameter of the obstruction filler is 1-10 microns. The invention also discloses a manufacturing method of the leakproof sealant for a nickel-hydrogen battery. By the manufacturing method, flowing property of the sealant can be remarkably reduced, the sealing performance of anelectrolyte is strong, and an alkaline electrolyte can be effectively prevented from leaking from the top of a battery. The sealant can effectively release a few of gases to balance internal and external air pressure. Then, stability of the sealant is strong, and the alkaline electrolyte will not leak from the top of the battery. Thus, normal service life and use performance of the battery are effectively ensured. As high and low temperature resistance of the sealant is also strong, stability of the sealant can be further ensured.

Description

technical field [0001] The invention relates to a battery sealant, and specifically discloses a leak-proof sealant for a nickel-metal hydride battery and a manufacturing method thereof. Background technique [0002] Ni-MH batteries are made of two main materials, hydrogen storage alloy and spherical nickel hydroxide, with good performance, strong reliability, safety and pollution-free, good low temperature performance, fast charge and discharge, high discharge rate, long service life, etc. Excellent performance, the discharge capacity is 1.5 to 2 times that of nickel-cadmium batteries, and it has no pollution to the environment. [0003] Existing Ni-MH battery sealant is made of asphalt, olefin resin and thinner. The battery using this sealant will have the problem of alkali creep during storage or use. Alkali creep refers to the The alkaline electrolyte climbs up the container mouth, that is, the alkaline electrolyte leaks from the contact surface between the steel shell o...

AI Technical Summary

Problems solved by technology

[0003] Existing Ni-MH battery sealant is made of asphalt, olefin resin and thinner. The battery using this sealant will have the problem of alkali creep during storage or use. Alkali creep refers to the The alkaline electrolyte climbs up the container mouth, that is, the alkaline electrolyte leaks from the contact surface between the steel shell or the cap and the sealing ring. The alkali climbing will cause the positive and negative electrodes of the battery and the self-discharge rate of other circuits to accelerate, and at the same time Reduce the insulation level of the positive and negative electrodes of the battery and the DC system, and the electrolyte will be consumed for no reason, reducing the service life of the battery; the gas generated during the charging and discharging process of the battery will cause the internal and external air pressure to be unbalanced, which will easily reduce the sealing performance of the sealant, which will Increased chance of alkali creep

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