Sealed nickel-cadmium secondary types

In Japan, the Furukawa Battery Co., Ltd. industrialized a sintered-type vented nickel-cadmium battery for airplane starting in 1955. The Furukawa Battery Co., Ltd. started mass production of the vented-type nickel-cadmium secondary battery and a sealed nickel-cadmium secondary battery for industrial use in 1962 and developed the same to the fields, such as aircrafts. 

Then, A. B. Lange and others found how a cadmium electrode consumes the oxygen from a positive electrode during overcharging in 1938. Then, G. Neumann and others established the present sealing principle and basic structure of a sealed-type nickel-cadmium secondary battery in 1948. Then, the sealed-type nickel-cadmium secondary battery has come to rapidly spread mainly in the consumer electronic equipment market. 

On the other hand, Sanyo Electric Co., Ltd. started mass production of a consumer sealed type nickel-cadmium secondary battery. Then, other companies produced a consumer sealed-type nickel-cadmium secondary battery commercially one after another. Then, the batteries have been used as the main power supply of portable electronic devices such as cordless power tools and toys, video cameras, and notebook PCs in 1980s, and the production amount has enlarged drastically. 

Eveready sealed secondary nickel-cadmium cells and batteries are now widely used as a rechargeable power source in many different types of portable or cordless ele trical appliance. Charging at the safe recommended C/10 ratd has proved satisfactory for recharging the cells or batteries used in many of these appliances, such as toothbrushes, shavers, etc., where relatively long rest periods between uses are possible. However, there is now a demand for the use of sealed nickel-cadmium cells and batteries in other applianees, such as chain saws, electronic flashes, portable drills and professional hair elippers, where the rest periods between uses of the applianees are mueh shorter eonsequently shorter reeharging times, from about 3h to about 1 h, that is, C/3 to C/1 rates, are required. 

Primary batteries, zinc-alkaline manganese dioxide, mercury-zinc, carbon-zinc Leclanch, magnesium types, lithium types, silver oxide-zinc, zinc chloride Leclanchd, zinc-air secondary batteries, sealed lead—acid, sealed nickel-cadmium. 

Primary batteries, zinc-alkaline manganese dioxide, mereury-zinc, carbon-zinc Leclanche, magnesium types, zinc chloride Leclanche secondary batteries, alkaline, nickel-iron, nickel-cadmium, silver-zinc, sealed lead-acid. 

---