For the purposes of this Annex the following definitions apply:
(1) ‘Rated capacity’ means the total number of ampere-hours (Ah) that can be withdrawn from a fully charged battery under reference conditions.
(2) ‘Capacity fade’ means the decrease over time and upon usage in the amount of charge that a battery can deliver at the rated voltage, with respect to the original rated capacity.
(3) ‘Power’ means the amount of energy that a battery is capable of providing over a given period under reference conditions.
(4) ‘Power fade’ means the decrease over time and upon usage in the amount of power that a battery can deliver at the rated voltage.
(5) ‘Internal resistance’ means the opposition to the flow of current within a cell or a battery under reference conditions, that is, the sum of electronic resistance and ionic resistance to the contribution to total effective resistance including inductive/capacitive properties.
(6) ‘Energy round trip efficiency’ means the ratio of the net energy delivered by a battery during a discharge test to the total energy required to restore the initial state of charge by a standard charge.
Part A
Parameters related to electrochemical performance and durability
1. Rated capacity (in Ah) and capacity fade (in %).
2. Power (in W) and power fade (in %).
3. Internal resistance (in Ω) and internal resistance increase (in %).
4. Where applicable, energy round trip efficiency and its fade (in %).
5. The expected life-time of the battery under the reference conditions for which it has been designed, in terms of cycles, except for non-cycle applications, and calendar years.
Part B
Elements to explain the measurements for parameters listed in Part A
1. Applied discharge rate and charge rate.
2. Ratio between nominal battery power (W) and battery energy (Wh).
3. Depth of discharge in the cycle-life test.
4. Power capability at 80 % and 20 % state of charge.
5. Any calculations performed with the measured parameters, if applicable.