提高扣式锂离子蓄电池容量研究

锂离子蓄电池正、负极制造的传统工艺是将正、负极活性物质分别与导电剂和粘结剂混合 ,并高速搅拌成浆涂布在铝箔和铜箔上。这种工艺制造的扣式电池容量较小 ,不能满足高速发展的电子产品对电池高容量的要求。为了提高扣式锂离子蓄电池的容量和功率 ,对电池的正、负极制造及装配工艺进行了研究。结论是用压膜法代替涂布法制造正、负极片的工艺 ,可增大极片的密度和比能量 ,用迭层法制造极组装配电池 ,对提高电池的容量有明显效果。

Study on improving capacity of coin-sized Li-ion battery

The traditional technology for manufacturing cathode and anode for Li ion battery is to mix the cathode and anode active materials with conducting reagent and binder respectively, then stir the mixtures into slurry at high speed and spread it on Al foil and Cu foil. The capacity of coin sized Li ion batteries manufactured by the technology is low and can not meet the request of modern electronic products to high capacity of battery. The technologies for manufacturing and assembling cathode and anode were investigated in order to improve the capacity and power of coin sized Li ion battery. The results show that substituting the spreading method by membrane pressing method to manufacture cathode and anode can increase the density and specific energy, and manufacturing electrode group for assembling battery by laminating method has obvious effect on improving battery capacity.