1. PTC PTC:

　　Lithium battery manufacturer: PTC meta equipment supports the maintenance of the battery pack for excessive current maintenance. The equipment will increase with the temperature and the resistance linear becomes larger. When the current or temperature increases to a certain value, the resistance value will be mutated (becoming larger). Therefore, the current becomes the MA level, and the temperature will be reduced to normal. It can be used as a battery segment into the battery pack.

　　PTC is often called overcurrent maintenance in lithium -ion battery electronic lines, and the cost is relatively high.

　　PTC, also known as overcurrent maintenance, is important for short -circuit and overload maintenance of small -power electronic equipment.

　　Second, thermal sensitivity switch NTC:

　　The NTC meta -equipment can quickly induced the current and temperature change temperature in the circuit too high or the current can make the temperature of the dual metal sheet in the switch reaches the rated value of the switch. It is often seen in the maintenance application of lithium ion battery circuits.

　　The thermist switch NTC metal tablets may not be resigned after the jumping of the jumping, which makes the battery pack voltage cannot operate.

　　Third, fuse fuse:

　　When the temperature in the circuit surpass the rated value or the temperature of the battery rises to a certain value, the FUSE fuse melting makes the circuit disconnect to maintain the battery pack and use electrical appliances.

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