Method for developing low-temperature PPTC of power battery

Abstract

The invention discloses a method for developing the low-temperature PPTC of a power battery. The method comprises the following steps: step 1, preparing materials; step 2, tabletting; step 3, sintering; step 4, performing nickel plating; and step 5, edging. In the step 1, 80 parts by weight of barium carbonate, 100 parts by weight of titanium dioxide, 16 parts by weight of lead oxide, 3 parts by weight of silicon dioxide, 0.065 part by weight of manganous nitrate solution and 0.1 part by weight of antimony trioxide are weighed. The preparation method of the low-temperature PPTC of the power battery is beneficial to the uniformity of a nickel layer in the nickel plating process, so that the yield is improved, the traditional cleaning mode is changed, the danger in the preparation process is reduced, and meanwhile, the protection of the body health of workers is facilitated.

Description

technical field [0001] The invention relates to the technical field of polymer positive coefficient temperature elements, in particular to a development method of low-temperature PPTC for power batteries. Background technique [0002] PPTC, that is, polymer positive coefficient temperature element, also known as resettable fuse or polymer fuse, PPTC is characterized by low resistance under normal current conditions, and a sharp increase in resistance under overcurrent faults, thereby protecting the back-end circuit ,Due to its excellent recoverable characteristics, when used for overcurrent protection, the circuit can automatically return to the conduction state after the fault is eliminated. Because of this characteristic, it is convenient to protect the circuit, so PPTC is widely used, and in the process of developing PPTC , the resistance sheet needs to be nickel-plated. In the traditional process of nickel-plating the resistance sheet, the static method is usually used t...

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Problems solved by technology

[0002] PPTC, that is, polymer positive coefficient temperature element, also known as resettable fuse or polymer fuse, PPTC is characterized by low resistance under normal current conditions, and a sharp increase in resistance under overcurrent faults, thereby protecting the back-end circuit ,Due to its excellent recoverable characteristics, when used for overcurrent protection, the circuit can automatically return to the conduction state after the fault is eliminated. Because of this characteristic, it is convenient to protect the circuit, so PPTC is widely used, and in the process of developing PPTC , the resistance sheet needs to be nickel-plated. In the traditional process of nickel-plating the resistance sheet, the static method is usually used to nickel-plate the resistance sheet. This nickel-plating method will easily lead to uneven nickel layer, thereby reducing the yield rate. And in the cleaning process, the volatility of alcohol and acetone is usually used for cleaning, but because alcohol and acetone are flammable, the danger in the development process is increased during the cleaning process, and the long-term work of the staff is easy. Harmful to health

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