lithium ion battery accu charger 29.4v 42v 54.6v 58.8v 67.2v 84v
The charging process of lithium-ion batteries is divided into two stages. The first stage is constant current charging. When the voltage is lower than 4.2V, the charger will charge with a stable current. The second stage is constant voltage charging. When the battery voltage reaches 4.2V, due to the characteristics of lithium batteries, if the voltage is higher, it will be damaged, so the battery voltage will be fixed at 4.2V, and the current will gradually decrease to 0.1 C. Cut off the charging circuit, the charging completion indicator will light up, and the charging is complete.
Excessive charging and discharging will cause permanent and irreversible damage to the positive and negative electrodes of the battery. Excessive discharge causes the negative carbon sheet structure to collapse, and the collapse will cause the lithium ions to be unable to be inserted during the charging process; overcharging causes too much lithium ions to be embedded in the negative carbon structure, and part of the lithium ions can no longer be released.
18650 lithium battery charger
Some chargers are implemented using cheap solutions, and the control accuracy is not good enough, which can easily cause abnormal battery charging and even damage the battery. When buying a charger, try to choose a big brand of 18650 lithium-ion battery charger, quality and after-sales guarantee, and extend the life of the battery. The regular 18650 lithium-ion battery charger has four protections: short-circuit protection, over-current protection, over-voltage protection, battery positive and negative reverse connection protection functions. Overcharge protection: When the charger overcharges the lithium-ion battery, in order to prevent the internal pressure from rising due to temperature rise, the charging state must be terminated. For this reason, the protection device needs to monitor the battery voltage, and when it reaches the battery overcharge voltage, it activates the overcharge protection function and stops charging. Over-discharge protection: In order to prevent the battery from over-discharging, when the lithium-ion battery voltage is lower than its over-discharge voltage detection point (usually 2.7v-3.0V), the over-discharge protection is activated, the discharge is stopped, and the battery is kept in a low static state Current standby mode. Overcurrent and short circuit protection: When the discharge current of the lithium ion battery is too large or a short circuit occurs, the protection device will activate the overcurrent protection function
What is the difference between chargers and adapters?
What is the charging current for chargers?
