What is the basics of the charging method of the aircraft model lithium battery?

　　Author ：Iflowpower – Portable Power Station Supplier

Most dedicated model lithium-ion battery charging integrated circuits are charging in this way. Amount lithium ion battery divided by three charging methods: precharge, fast charging constant current (CC) and constant voltage (CV). When the battery unit voltage is 3.

0V or less in the precharge step, the battery is charged at a low speed. This restores the passivation layer, which can be completely discharged during long-term storage. When a partial copper is broken on the battery anode of over-discharge short circuit, it can also prevent 1C charging rate overheating.

1. When the lithium-ion battery voltage reaches 3.0V, the charger enters the CC step, the rapid charging current is usually limited to the speed of 0.

5c to 1c to prevent overheating and thus deteriorate. When the alarm lithium ion battery is fully charged, the charger starts controlling the battery voltage, and when entering the CV level, the charging current has dropped sharply to a predetermined end level. To prevent long-term charging of the dead battery, usually quickly charge the safety timer.

Even if the battery does not reach the shutdown current, it must also turn off the battery charger after the safety time is completed. 2. The battery capacity is the function of the battery voltage.

The higher the radical lithium ion battery voltage, the greater the battery capacity. However, the higher the battery charging voltage, the shorter battery life. When the battery voltage is high, the battery positive electrode material is faster than the electrolyte, and the cobalt material is permanently lost during chemical reaction.

Therefore, the available energy storage material is reduced, resulting in a chemical capacity loss of the battery. Therefore, the accuracy of the battery charging voltage is very important. 3, time is an important factor in charging of battery charging in a constant current state, 70% of the total capacity of the rechargeable battery is about 30%, and the charging time is only about 70% of the charging time in a constant voltage state.

This is because there is a resistance inside the battery. The lower the battery internal resistance, the shorter battery charging time. 4, charging current must not exceed the maximum charging current specified in the specification, using higher than recommended current charging will cause charging and discharging performance, mechanical performance and safety performance of battery, and may result in fever or leakage.

At present, the market-selling 5C current charging model lithium-ion battery, it is recommended not to use 5C charging frequently, so as not to affect battery life. 5, charging voltage: The charging voltage must not exceed the specified limit voltage (4.2V / monomer battery), 4.

25V is the highest limit of each throttle voltage. 6, charging temperature: lithium-ion battery must be charged within the environmental temperature specified by the product specification, otherwise the battery is susceptible to damage. When the battery surface temperature is found, the charging should be stopped immediately.