Author ：Iflowpower – Portable Power Station Supplier
The correct charging method of lithium-ion batteries Most dedicated model battery charging integrated circuits (ICs) are battery charging in this way. Amount battery division three charging methods: precharge, fast charging constant current (CC) and constant voltage (CV). When the battery cell voltage is 3.
0V or less in the precharge step, the battery is charged at a low speed (1/10 of the fast charging 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 guard the charge rate of 1C (1C speed within 1 hour, the current can be completely discharged) overheat.
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, and the overheat is overheated and the deterioration. Do not adjust the speed, so that the battery temperature is not more than 45 ¡ã C. The battery is charged at high speed until the battery reaches the voltage regulatory limit (based on the Cathode battery based on LiicoO2 is 4.
2V / battery, the LicoO2-based anode coupling battery is 4.4V) is. When the battery is fully charged, the charger starts controlling the battery voltage, and when entering the CV level, the charging current has dropped sharply to the 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 is not necessary to close the battery charger after the safety time. 2.
The battery capacity is the function of the battery voltage. The higher the 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. At 4.
3V charge, it can initially add about 10% extra capacity, but the battery life is halved. On the other hand, if the battery is not overflowing, the battery capacity will decrease. When the battery is charged with 40 mV voltage, about 8% of the total capacity will reduce.
Therefore, the accuracy of the battery charging voltage is very important. 3, time, is an important factor in battery charging In a constant current state, the total capacity of the rechargeable battery is about 30% of the charging time, 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. New battery charging current rate is not a valid approach to shorten battery charging time. The charging time can be shortened in a constant current state, but the charging time is added in a constant voltage state.
Therefore, shorten the total charging time is very small. On the other hand, when the battery current rate is 1c or higher, the battery life is affected. Pay attention to, the above is only to illustrate the charging form of some lithium-ion batteries, for reference only, in addition, the model battery charges do not have to be so troublesome, just in accordance with the manufacturer's manual, prevent overcharge, people guard against charging, do protective measures.
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