Method for determining the state of health of a Li-ion battery cell, the cell being intended to be operated in a usage voltage range for a usage application, the method comprising steps consisting in: - defining a measurement voltage range comprised in the usage voltage range and delimited by a first predetermined measurement voltage value and a second predetermined measurement voltage value, and - when the voltage across the terminals of the cell is comprised between the first predetermined measurement voltage value and the second predetermined measurement voltage value: - measuring the value of the current across the terminals of the cell, - measuring the value of the temperature of the cell, - determining one of the values among: ∘ the total charge acceptance when discharging (Q d-T) over the measurement voltage range; ∘ the total charge acceptance when charging (Q c-T) over the measurement voltage range; the total charge acceptance when discharging (O d-T), respectively when charging (Q c-T), being determined by the sum of the values Q d (t k), respectively Q c (t k), between the first predetermined measurement voltage value and the second predetermined measurement voltage value, the value Q d (t k), respectively Q c (t k), being the value of the charge acceptance when discharging, respectively when charging, corresponding to the Ampere-hour quantity discharged, respectively charged, of the cell at time k (t k) or during a time step equal to t k; and - determining the state of health of the cell on the basis of a predetermined relationship, over the measurement voltage range, between the total charge acceptance when discharging (Q D-T), respectively when charging (Q c-T), and the state of health of the cell, characterized in that: - If the cell is discharging, then the value Q d (t k) is determined according to the formula Q d (t k) = α(T,C) * I(t k); - If the cell is charging, then the value Q c (t k) is determined according to the formula Q c (t k) = β(T,C)* I(t k); Where α(T,C) and β(T,C) are coefficients the values of which depend at least on the temperature and optionally also on the current and which are prerecorded in a memory, and I(t k) is the value of the current at time k (t k) or during a time step equal to t k. - defining a measurement voltage range comprised in the usage voltage range and delimited by a first predetermined measurement voltage value and a second predetermined measurement voltage value, and - when the voltage across the terminals of the cell is comprised between the first predetermined measurement voltage value and the second predetermined measurement voltage value: - measuring the value of the current across the terminals of the cell, - measuring the value of the temperature of the cell, - determining one of the values among: ∘ the total charge acceptance when discharging (Q d-T) over the measurement voltage range; ∘ the total charge acceptance when charging (Q c-T) over the measurement voltage range; the total charge acceptance when discharging (O d-T), respectively when charging (Q c-T), being determined by the sum of the values Q d (t k), respectively Q c (t k), between the first predetermined measurement voltage value and the second predetermined measurement voltage value, the value Q d (t k), respectively Q c (t k), being the value of the charge acceptance when discharging, respectively when charging, corresponding to the Ampere-hour quantity discharged, respectively charged, of the cell at time k (t k) or during a time step equal to t k; and ∘ the total charge acceptance when discharging (Q d-T) over the measurement voltage range; ∘ the total charge acceptance when charging (Q c-T) over the measurement voltage range; the total charge acceptance when discharging (O d-T), respectively when charging (Q c-T), being determined by the sum of the values Q d (t k), respectively Q c (t k), between the first predetermined measurement voltage value and the second predetermined measurement voltage value, the value Q d (t k), respectively Q c (t k), being the value of the charge acceptance when discharging, respectively when charging, corresponding to the Ampere-hour quantity discharged, respectively charged, of the cell at time k (t k) or during a time step equal to t k; and - determining the state of health of the cell on the basis of a predetermined relationship, over the measurement voltage range, between the total charge acceptance when discharging (Q D-T), respectively when charging (Q c-T), and the state of health of the cell, characterized in that: - If the cell is discharging, then the value Q d (t k) is determined according to the formula Q d (t k) = α(T,C) * I(t k); - If the cell is charging, then the value Q c (t k) is determined according to the formula Q c (t k) = β(T,C)* I(t k);