+ANNEX IV

ANNEX IV



ANNEX IV

ELECTROCHEMICAL PERFORMANCE AND DURABILITY REQUIREMENTS FOR LMT BATTERIES, INDUSTRIAL BATTERIES WITH A CAPACITY GREATER THAN 2 KWH AND ELECTRIC VEHICLE BATTERIES

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‘Rated capacity’ means the total number of ampere-hours (Ah) that can be withdrawn from a fully charged battery under reference conditions.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.

1. Przegląd

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1.1 Odwołania

1.2 Zidentyfikowane wymagania

1.3 Powiązane normy

2. Zidentyfikowane wymagania

Wymagania

3. Powiązane normy

Normy