Method for managing charging of a rechargeable battery

A method for managing charging of a rechargeable battery, comprising at least one charging phase comprising at least:

• charging said battery by periodic rectangular current pulses alternately taking a first amplitude during a first period and a second amplitude during a second period, the second amplitude being lower than the first,
• measuring periodically the voltage at the battery terminals,
• calculating, from said measured voltage, a slope value representative of the voltage variation versus time,
• comparing an absolute value of the slope at the end of each period with a predetermined full-charge threshold representative of full charge of the battery,
• and interrupting said charging by periodic rectangular current pulses when said absolute value of the slope is greater than or equal to said full-charge threshold.

A method for managing charging of a rechargeable battery, comprising at least one charging phase and a prior phase of estimating the state of charge of the battery, said prior phase of estimating the state of charge comprising:

• applying a few periodic rectangular test current pulses alternately taking the first amplitude during the first period and the second amplitude during the second period,
• measuring periodically a voltage at the battery terminals,
• calculating, from said measured voltage, a voltage slope value representative of the variation of the voltage versus time,
• comparing the absolute value of the slope at the end of each period with a predetermined full-charge threshold,
• and switching to charging phase when said absolute value of the slope is lower than said full-charge threshold.