3) must be a high purity nitrogen uniform protection, especially aluminum batteries required high purity nitrogen, or aluminum surface will produce molten hard Al2O3 (melting point of 2400 ?).Four, batteries swelling Causes and Control, Lithium-ion batteries used in the manufacturing process and there is often swelling, through analysis and research, found mainly in the following two reasons: Overcharge Protection: Over charge protection IC principle: At this time, the battery voltage protection IC to be detected, when it reaches 4.25V when (assuming the battery overcharge point 4.25V) starts over-charge protection, the power MOS from on to off, and then closing charge. 1 to bring lithium ions thickness, Rechargeable lithium-ion batteries emerge from the cathode embedded negative, causing the negative electrode layer spacing increases, which results in swelling, in general, the thicker the batteries, the greater the amount of expansion. Expansion due to poor process control, During the manufacturing process, such as slurry dispersion, C / A ratio discrete, temperature control batteries will directly affect the degree of expansion of the batteries. so violent chemical reaction. Gas produced by the reaction caused by pressure within the batteries, increasing the expansion behavior of batteries. 2. Especially water, because of the formation of highly reactive lithium rechargeable carbon compounds are very sensitive to water, Therefore, in the production, in addition to the plate should strictly dehumidification, the course of the injection liquid dehumidification equipment should be used to ensure air drying degree of HR2%, dew point (wet air in the atmosphere due to the temperature drop, the water vapor contained in saturation and the temperature begins to condense) is less than -40 ?. In very dry conditions, and take the vacuum injection liquid, which greatly reduces the probability of water and electrolyte plate. Asus k52f battery Acer 31cr19/66-2 battery Acer al10a31 battery IBM ASM 92p1132 battery Acer Aspire 5251-1549 battery
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