Today (July 5) at noon, the temperature soared to more than 30 degrees. At the gate of No. 600, North Chengdu Road, a green shared electric vehicle battery ignited. Firefighters heard the news, and after arriving at the scene, they used water guns to cool down the smoking shared motorcycles.
Into the summer, high temperature. Can more than 60000 shared motorcycles all over the city withstand the test of hot sun? Is the similar spontaneous combustion only an individual phenomenon? The reporter learned from the aspect of enjoying riding that the normal bearing temperature of the vehicle battery used by enjoying riding is - 20 to 60 & deg;, which is safe in principle, but it can not exclude the self ignition caused by the water in the battery shell or the deformation caused by the collision, the water in the charging and discharging ports, or even the artificial damage, etc. Possibility. The on-board battery has been tested by the testing center of Shanghai Research Institute of chemical industry, and there is no fire during the test, and the test results show that it is safe and reliable. (this article is exclusively compiled by WYH, editor of sihai.com. If you need to reprint it, please indicate the source and source. Related article link: http://www.4hw.com.cn/life/anquan.html)
How to prevent spontaneous combustion of trams in summer?
There are two main reasons for the spontaneous combustion of the battery car: one is that the external fire burns to the battery, which causes the melting of the lead pile head with low ignition point; the other is that the wire joint on the positive pile head is not fixed tightly, or the poor conductivity is caused by corrosion. When the large current flows, the local high heat is generated due to the excessive resistance, which melts the lead pile head.
Sulfuric acid in the battery liquid is the main cause of the corrosion of the battery pile head. Once the engine is started, the generator will charge the battery, and hydrogen bubbles will be generated in the battery. Some sulfuric acid components will be discharged from the battery with hydrogen, especially when the charging system is faulty, such as the generator voltage is too high, or the charging is not controlled, resulting in over charging, etc., which will lead to a lot of sulfuric acid components running to the battery panel, so the two pile heads will be severely corroded by poisonous hands. (this article is exclusively compiled by WYH, editor of sihai.com. If you need to reprint it, please indicate the source and source. Related article link: http://www.4hw.com.cn/life/anquan.html)
How to remove the sulfuric acid corrosion on the battery pile head?
First, open the engine cover of the battery car, remove the pile head, spray and wash the lead pile head and the wire joint with alkaline detergent, and then apply a thin layer of butter or vaseline oil on it after wiping, and finally connect the wire joint on the pile head with a wrench. In order to avoid sparks, before removing the battery pile head, all electrical appliances and ignition in the vehicle shall be turned off, and the negative pile head must be removed first, and then the positive pile head. When the pile head is replaced, the positive pole shall be installed first and then the negative pole.