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, Qingdao Childs battery electrolyte separator also may climb to lug along on the bus, the bus of the alloy will be oxidized to produce lead sulfate, stroller battery, if the bus electrode alloy inappropriate choice of impurities and crevice corrosion along these cracks will deepen, leading to very ears and bus disengaged negative plate failure. 3, membrane perforation caused by short circuit of individual species diaphragm aperture greater 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. Lead-acid battery electric vehicle battery development process of lead-acid batteries created by the French Plante (G.Plante). In 1860 he sent the samples to the French Academy of Sciences. In 1873, DC generator advent of lead-acid batteries only gradually toward practical use. 1910, lead-acid battery production by two large driving force, first began to do to start a car battery, Beijing stroller batteries, lighting, ignition purposes; the second is the telephone industry using lead-acid batteries as a backup power source, asking them to safety, and reliable, and the battery can be used for many years. Since then the field of lead-acid batteries used in various cars, motorcycles, Baoding stroller battery, railway, mining, communications and so on. In 1860, Plante (G.Plante) achieved by repeated charge and discharge grids form an active substance in dilute sulfuric acid as the electrolyte of the first lead-acid batteries. In 1873, the advent of the DC generator, lead-acid batteries since a reliable power supply. In 1881, the British Lung color (Sellon) invention lead-antimony alloy grid, the grid and Darfur combined dusting method, there has been a so-called paste type electrode plate. This production method is simple and feasible, to facilitate production. In 1882, Cladstone and vulcanization Tribe proposed theory, since the establishment of a recognized chemical reaction. In 1886, udor and Lucas completed a convenient method of forming a positive plate system (plus corrosive electrolyte). In 1910, Exide launched tubular positive plate. In 1935, Haring invention and Thomas lead-antimony alloy grid. 1935 Slegler invention instead of hard glass tube hose previously used for tube plate. In 1970, Deviff create the first VRLA batteries with depleted liquid type structure. Above content provided by Hebei Tianyi Electric Co., Ltd., we hope to help a friend in the same industry. Qingdao Childs battery stroller battery _ _ provided by Tianyi Electric Appliance Co., Ltd. Hebei Tianyi. Road Zhiyuan, temper forward. Hebei Tianyi Electric Co., Ltd. (www.tianyidq.com) aims to become and you win symbiosis, strategic partners to move forward, more determined to become the most influential of the wall switch business, and you leap together to success!