Method for managing a target recharge voltage setpoint of a rechargeable electric battery of a motor vehicle, the method comprising the following steps: - a step of defining a target state of charge of the rechargeable electric battery, - a step of determining a target recharge voltage of the rechargeable electric battery as a function of the target state of charge of said rechargeable electric battery, the target recharge voltage being defined as the voltage to be applied to the terminals of the rechargeable electric battery to recharge it so as to reach the target state of charge previously defined, characterized in that it further comprises: - a step of securing the target recharge voltage of the electric battery, leading to defining a safe recharge voltage of said rechargeable electric battery as a function of the target recharge voltage, the safe recharge voltage being equal to: - the target recharge voltage if the target recharge voltage is between a minimum threshold voltage and a threshold voltage maximum, or if the target recharge voltage is equal to the minimum threshold voltage or the maximum threshold voltage, - the minimum threshold voltage if the target recharge voltage is strictly lower than the minimum threshold voltage, - the maximum threshold voltage if the target recharge voltage is strictly greater than the maximum threshold voltage, - a step of defining a target recharge voltage setpoint of the rechargeable electric battery, the target recharge voltage setpoint of the rechargeable electric battery being defined on the basis of the secure recharge voltage, - a step of correcting the target recharge voltage applied to the terminals of the rechargeable electric battery from a secure recharge voltage and a value of the recharge voltage measured at the terminals of the rechargeable electric battery. - a step of defining a target state of charge of the rechargeable electric battery, - a step of determining a target recharge voltage of the rechargeable electric battery as a function of the target state of charge of said rechargeable electric battery, the target recharge voltage being defined as the voltage to be applied to the terminals of the rechargeable electric battery to recharge it so as to reach the target state of charge previously defined, - a step of securing the target recharge voltage of the electric battery, leading to defining a safe recharge voltage of said rechargeable electric battery as a function of the target recharge voltage, the safe recharge voltage being equal to: - the target recharge voltage if the target recharge voltage is between a minimum threshold voltage and a threshold voltage maximum, or if the target recharge voltage is equal to the minimum threshold voltage or the maximum threshold voltage, - the minimum threshold voltage if the target recharge voltage is strictly lower than the minimum threshold voltage, - the maximum threshold voltage if the target recharge voltage is strictly greater than the maximum threshold voltage, - a step of defining a target recharge voltage setpoint of the rechargeable electric battery, the target recharge voltage setpoint of the rechargeable electric battery being defined on the basis of the secure recharge voltage, - a step of correcting the target recharge voltage applied to the terminals of the rechargeable electric battery from a secure recharge voltage and a value of the recharge voltage measured at the terminals of the rechargeable electric battery. - the target recharge voltage if the target recharge voltage is between a minimum threshold voltage and a threshold voltage maximum, or if the target recharge voltage is equal to the minimum threshold voltage or the maximum threshold voltage, - the minimum threshold voltage if the target recharge voltage is strictly lower than the minimum threshold voltage, - the maximum threshold voltage if the target recharge voltage is strictly greater than the maximum threshold voltage, - a step of defining a target recharge voltage setpoint of the rechargeable electric battery, the target recharge voltage setpoint of the rechargeable electric battery being defined on the basis of the secure recharge voltage, - a step of correcting the target recharge voltage applied to the terminals of the rechargeable electric battery from a secure recharge voltage and a value of the recharge voltage measured at the terminals of the rechargeable electric battery.