Aircraft Batteries Part 1: General Test Requirements and Performance Levels
|Publication Date:||1 September 2004|
|ICS Code (Aerospace electric equipment and systems):||49.060|
|ICS Code (Acid secondary cells and batteries):||29.220.20|
This part of IEC 60952 defines test procedures for the evaluation, comparison and qualification of batteries and states minimum environmental performance levels for airworthiness. Where specific tests are defined with no pass/fail requirement (to establish performance capability), the manufacturer's declared values, from qualification testing, will be used to establish minimum requirements for ongoing maintenance of approval for that design of battery.
To provide representative examples, this standard utilises voltage and current values based upon an aircraft electrical system nominally rated at 28 V d.c. Additionally, the nominal values for cell voltage are assumed to be 1,2 V per cell for nickel-cadmium batteries and 2,0 V per cell for lead-acid batteries. It is important to note that when using this standard to evaluate products designed to operate on an aircraft electrical system other than the nominal 28 V d.c., or whose chemical properties are such that the individual cell voltage differs from that stated above, test values need to be adjusted accordingly.
The specific topics addressed in this part of 60952 serve to establish acceptable quality standards required to qualify a battery as airworthy and are divided into 2 classes (class I and II) as defined in Clause 3 of this standard.
- Most of the requirements of this Part 1 state the minimum performance level for class I applications which are also mandatory for class II applications.
- Subclauses 5.6 and 6.6 state 2 different levels of performance for class I and II applications.
- Clause 7 states special requirements for class II applications only.
In cases where a specific application demands testing and/or requirements exceeding those detailed in this standard the purchaser will detail said requirements in the product specification and the method of establishing compliance.