The United States invented a sensor that timely reflected the abnormal internal temperature of lithium batteries

Lithium batteries are the core components of electric vehicles and are also widely used in notebook computers, mobile phones and aerospace equipment. However, there are still some problems in the safety of lithium batteries. The reason is that the temperature sensor attached to the outer surface of the battery is still too slow to react, causing the accident of the lithium battery to catch fire and explosion. Researchers at the Applied Physic Laboratory (APL) at the Johns Hopkins University in the United States have discovered that when a problem occurs with a lithium battery, a small alternating current flows between the two poles of the battery. Based on this discovery, APL researchers developed a built-in sensor at the end of 2011. This sensor uses the power of the battery itself. When it catches an abnormal current, it immediately triggers the battery control system to take corrective measures and avoid the battery in time. Overheating causes an accident.

APL has applied for a global patent for this technology and is actively looking for opportunities for technology transfer.

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