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CTECHI is an expert in battery solutions, specializing in ODM, OEM, and SKD for energy storage, motive power, and consumer batteries.

What are the reasons for the explosion of lithium batteries

Battery problems of brand mobile phones are relatively rare, and problems with the battery itself mostly occur in refurbished phones or second-hand phones. In order to save costs, mobile phones or refurbished phones tend to choose low-cost low-quality batteries in the configuration of mobile phones. These batteries have low cost, excessive impurities, unsatisfactory design process, and high risk of self-explosion. Long-term overcharge of the battery: In the long-term charging state, overcharge and overcurrent will also cause high temperature and high pressure, which may cause hidden dangers. Lithium batteries may instantaneously discharge under special conditions of temperature, humidity, and poor contact to generate a large amount of current, and cause spontaneous combustion or explosion. Battery short-circuit: When the mobile phone is in a high temperature state, or is subjected to impacts, metal friction, etc., it may cause the battery to short-circuit and explode. Charging causes the battery to explode: charging while playing with the phone, while playing and charging will cause the charging time to become longer, and charging for a long time will cause the temperature of the phone to rise, making it easier to explode. The charger does not match the battery: Generally, mobile phones have original chargers. A charger of the wrong model is likely to cause a battery accident. Apple mobile phones only accept the original charger to charge, which greatly reduces the chance of battery explosion. Excessive temperature: Excessive temperature means that the internal heat of the battery has reached the limit. Prolonged charging, high-temperature irradiation, and baking can easily cause the battery's temperature to become too high. In southern my country, ordinary families use electric ovens in winter. Many people like to use their mobile phones while grilling on the electric oven. This is also very dangerous. Thermal runaway: The reason why lithium-ion batteries have the risk of explosion is due to a process called 'thermal runaway' in the reaction inside the battery. 'Thermal runaway' is a positive energy feedback cycle: increased temperature will cause the system to heat up, and the system will heat up and increase the temperature, which in turn makes the system hotter. The above reasons such as short-circuit of the battery, high ambient temperature, frequent overcharging, unauthorized modification of the casing, etc., will cause thermal runaway of the lithium-ion battery, which may eventually cause a fire or explosion. But don’t worry too much, your electronic device is not a ticking time bomb. As long as it is used reasonably in normal times, the lithium battery will work safely and reliably. Whenever the power drops to 50%, you should charge it. Lithium ions have no memory effect, but too low a voltage can severely damage them.

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