The reason the battery pack and the cells produce sulphate of analysis: When a battery discharge often over-discharge, long-term low current discharge. b. Battery left open after the injection of the electrolyte (not achieve using the state) or the end of the battery pack to charge the battery for long periods. c. plate long exposed surface. d. electrolyte is impure, ups battery diameter, or long-term electrolyte density is too high. e. When the battery is discharged, open place for too long, no supplementary charge. f. charging prolonged interruption reasons. Above content provided by Hebei Tianyi Electric Co., Ltd., we hope to help a friend in the same industry. Electric car battery failure in the form of a thermal runaway due to the charging voltage is too high, the current is too large, causing the battery temperature, and finally to the battery deformation, cracking and failure. 2, corrosion under normal circumstances negative bus, bus no corrosion problems, but in VRLA batteries when establishing oxygen cycle, the battery substantially fill the upper space oxygen, electrolyte separator may also lug along climbed on the bus, the bus of the alloy will be oxidized to produce lead sulfate, ups battery, if the bus electrode alloy inappropriate choice of impurities and crevice corrosion along these cracks will deepen, leading off the tabs and bus open, Lancaster ups battery, the negative electrode plate failure. 3, causing a short circuit of individual species septum perforation membrane, the larger battery Yuasa ups, aperture, use may cause big hole, the active substance can pass through the large hole in the charge and discharge process, resulting in micro-short circuit, the battery failure. Above content provided by Hebei Tianyi Electric Co., Ltd., we hope to help a friend in the same industry. ups battery, Lancaster ups battery, a battery resistance (high-quality businesses) are provided by Hebei Tianyi Electric Co. Hebei Tianyi Electric Co., Ltd. (www.tianyidq.com) provide customers with "electric vehicle batteries, Childs battery, battery electric tricycle, wall switch" and other services, the company has "a resistance cell, Vicki Electric, Fluke Jubilee" and other brands . Focus on wall switches and other industries have a higher visibility in Xingtai. Welcomes inquiries, contact: Li.