What are the commonly used lithium battery protection electronic components?

Commonly used lithium batteries to protect electronic components; 1. Overcurrent protector PTC: PTC components support battery pack overcurrent protection, the device will increase with the temperature, the resistance linearly increases, when the current or temperature rises to a certain level When the value is reached, the resistance value suddenly changes (increases), so that the current changes to mA level. When the temperature drops, it will return to normal, which can be used as a battery connection piece in the battery pack in series. PTC is often called an overcurrent protector in lithium battery electronic circuits, and the cost is relatively high. PTC, also known as overcurrent protector, is mainly used for short circuit and overload protection of low-power electronic equipment. 2. Thermal switch NTC: This NTC component can quickly sense the current and temperature changes in the circuit. Excessive temperature or overcurrent can make the temperature of the bimetallic strip in the switch reach the rated value of the switch, and the metal strip can trip to protect it. The use of batteries and electrical appliances can often be seen in the protection of lithium battery circuits. The NTC metal sheet of the thermal switch may not reset after tripping, causing the battery pack voltage to fail to work. 3. Fuse FUSE: When the current in the circuit exceeds the rated value or the temperature of the battery rises to a certain value, the FUSE fuse blows to disconnect the circuit to protect the battery pack and electrical appliances from damage; FUSE can sense the current and temperature of the circuit, and the fuse It can’t be restored after fusing, it needs to be replaced in time, which is more troublesome, but now there are self-recoverable FUSE fuses on the market. When the ambient temperature is 20°C and the resettable fuse reaches thermal equilibrium, 100% of the current on the line flows through the resettable fuse. When the ambient temperature exceeds 20°C, it will cause the current through the resettable fuse to be reduced. When the ambient temperature reaches 85°C, the current passing through is only half of that when the ambient temperature is 20°C. When the current flowing reaches more than 2 times the rated current, the resettable fuse will operate. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete.