on August 29, 2022, the Indian Automotive Industry Standards Committee issued the second revision Amendment 2 of AIS-156 and AIS-038 (Rev.2), with immediate effect from the date of publication.
Today, Ancor shares the technical requirements for rechargeable energy storage systems for AIS-156 L-class vehicles.
01.
the date of manufacture shall be clearly written/stamped on the REESS cell and reflect the clear year and month of manufacture. Coding rules such as date codes are not acceptable.
02.
REESS cells are subject to test approval for IS 16893-Part 2 and Part 3 by a NABL-accredited laboratory.
03.
the cell shall be subjected to at least 5 charge-discharge cycles at C/3 current rate, and the cycle data shall be stored at the REESS assembly manufacturer.
04.
REESS shall have a pressure relief device to avoid internal pressure and gas release when the internal cell is short-circuited.
05.
the REESS shall have at least 4 temperature sensors in the battery pack to measure the cell temperature and be reacted by the battery management system (BMS). The temperature sensor should be placed in an appropriate position to obtain the true temperature value. If the temperature exceeds 60°C (the temperature limit will be determined according to the situation in India), the siren should sound an alarm, and if the vehicle is running, the BMS should cut off the power. Manufacturers should ensure that the thermal management system in the battery does not fail by using an air cooler.
06.
for parallel cells and cell strings, the REESS shall have an active parallel circuit to eliminate circulating current. These power semiconductor devices used in tandem with each other will also act as protection/safety switches, detecting faulty cell strings and isolating them. They will allow current to flow in both directions to charge and discharge the battery pack. If a fault is detected, the parallel cells and cell strings will be isolated. Therefore, the source parallel circuit is the battery pack must have. Alternatively, fuses/bond wires may be used to prevent circulating current from flowing through the parallel cells, and such a preventative device will help isolate faulty cells connected in parallel.
07.
adequate spacing between cells shall be ensured for efficient heat transfer and isolation of cells in the event of thermal runaway of the REESS. The cell gap of REESS shall be determined according to the type of cell geometry (cylindrical, prismatic or pocket) used and the cell capacity.
08.
in addition to the functions available in the battery management system (BMS), the REESS should also have additional safety fuses or circuit breakers.
09.
each REESS shall have a traceability document containing details of the cells, BMS, chargers used, as well as serial/lot numbers, charge and discharge data, etc., maintained by the REESS manufacturer.
10.
adequate protection of the cells under regenerative braking must be considered in the REESS design.
11.
according to the requirements of IS17387 standards, BMS needs to have data recording function.
12.
each battery pack must be associated with an RFID tag and the BMS shall have RF read/write capability. Important battery parameters related to history, transaction and safety status should be dynamically entered into the RFID tag, which can be used for tracking and debugging in case of damage.
The above is the introduction of Anconel's testing and certification to India's power battery standard update. It is for reference only. Some materials come from the Internet and do not represent Anconel's view of testing technology and responsibility for its authenticity. If you are involved in the content of the work, copyright and other issues, please contact us within 30 days, we will delete the content in the first time!
