Main Charge Methods for Rechargeable Batteries

Main Charge Methods for Rechargeable Batteries

Constant Current Charging（CC:Constant Current）

Constant current charging is a method of continuously charging a rechargeable battery at a constant current to prevent overcurrent charge conditions.

There is also a method of charging at a low constant current or varying the current in stages to prevent overvoltage charge）

Constant Voltage Charging（CV:Constant Voltage）

Constant voltage charging is a method of charging at a constant voltage to prevent overcharging.

The charging current is initially high then gradually decreases.

There is also a method where the voltage is initially low then gradually increased to prevent excessive temperature rise in the rechargeable battery）

Constant Power Charging（CP:Constant Power）

A constant charging method characterized by high initial current when the voltage is low, then decreasing current as the voltage gradually increases.

Constant Current Constant Voltage Charging（CCCV:Constant Current , Constant Voltage）

CCCV charging is a typical method of charging rechargeable batteries such as li-ion.

Operation switches between CC charging, which charges with a constant current, and CV that charges at a constant voltage, depending on the voltage of the rechargeable battery.

This is one of the methods used in ROHM charge control ICs.

Trickle Charging

A method of continuously charging the battery with a small current. Its name derives from the trickle of water.

Although the charging time is longer, the advantage is that the battery is not affected even if a small current continues to flow in a fully charged state.

This makes them Ideal for recharging lead-acid batteries, which have a high natural discharge rate, as well as batteries for emergency standby equipment that are not in constant use.