Analysis of Common Accidents in Customized AGV Lithium Batteries.
A Brief Analysis of Common Accidents in Customized AGV Lithium Batteries. Why do lithium batteries explode or burn. Burning or explosion are usually caused by the accumulation of heat that cannot be dispersed and accumulates to the ignition point. If the heat accumulates to a certain degree in a certain space, it will occur. As a battery, in summary, the above conditions usually do not occur due to the following four factors.
1. Internal short circuit (mostly in the form of a single soft package): Structural or technical defects that result in the insertion of the terminal ear, insufficient clearance of the insulation package, burrs, and broken insulation. Insertion of polar ears is commonly found in thick batteries with internal parallel connections. The insulation of the polar ear position is not in place, which can lead to internal acute short circuits in subsequent products, maintenance boards, or simple application processes, resulting in burning or explosion (internal short circuits: this is something I have a deep understanding of, and more than 2K of this type of battery were scrapped at that time. In practice, it is a planning disadvantage - the abnormal essence is: internal acute short circuits). However, nowadays this situation is rare unless there are external factors.
2. External short circuit: Burning and explosion caused by external short circuit of batteries below 1AH are not common, usually showing bulging or simply burning off the terminal ears. Personally analyzed are burning caused by external short circuit of power batteries or large capacity mobile phone batteries. This involves improper use by the customer - when installing the metal outer box, the ear insulation was not considered, resulting in abnormal battery smoking and burning at the installation site; The lack of proper construction and fixing methods for power batteries can lead to damage to the external insulation maintenance film or connection wire skin caused by shaking of the battery pack during user operation, ultimately resulting in short circuit and burning.
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