For the battery pack whose product of charging limit voltage and maximum charging current or maximum discharge current exceeds 15va, the packaging material shall be able to limit the spread of flame.
Shell: for user replaceable battery pack, the shell shall be made of material not lower than V-1; For non user replaceable battery pack, its shell shall be made of material not lower than V-2 level
Conductor: the conductor shall pass the test in Appendix g of the standard
Conductor: the conductor shall pass the test in Appendix g of the standard
Insulating material: the insulating material shall not be lower than V-1
The flame retardant grade V-1 is higher than V-2. The difference between V-1 and V-2 is whether there are combustion drops to ignite absorbent cotton in the combustion test.