Leader of Battery Safety & Battery Regulation Programs | PRBA
UN/SCETDG/WG/INF.
COMMITTEE OF EXPERTS ON THE TRANSPORT OF
DANGEROUS GOODS AND ON THE GLOBALLY
HARMONIZED SYSTEM OF CLASSIFICATION
AND LABELLING OF CHEMICALS
Sub-Committee of Experts on the
Transport of Dangerous Goods
Lithium Batteries Informal Working Group
Washington D.C.
11 -13 November 2008
LISTING, CLASSIFICATION AND PACKING
Transport of Lithium Batteries
Definition for large rechargeable battery
Transmitted by the experts from China
Background
As mentioned in PRBA proposal ST/SG/AC.10/C.3/2008/46 and informal paper from Japan UN/SCETDG/33/INF.36, the “large format” lithium ion battery has been widely used for hybrid-electric vehicles, electric vehicles, and for the military and aerospace purposes. In China, one of the most widely used of these kinds of vehicles is the electric bicycle. As estimated, the amount of electric bicycle in China by the end of 2008 could be achieved to one hundred million. This application did decrease dependency on petroleum and lighten pollution on environment.
The power for electric bicycle could be lead-acid battery, Ni-MH battery, and lithium ion battery. Considering the environment friendly and long cycle life of lithium ion battery, it will be more and more preferred to be used as the power of electric bicycle. Currently, the parameters of most well used lithium ion battery for electric bicycle are as below:
| C (Ah) |10 Ah |12 Ah |14 Ah |20 Ah |
| | | | | |
| | | | | |
|V (V) C (Wh) | | | | |
|36 V |360 Wh |432 Wh |504 Wh |720 Wh |
|48 V |480 Wh |576 Wh |672 Wh |960 Wh |
According to the proposal ST/SG/AC.10/C.3/2008/46, PRBA suggested a threshold of 600 Wh (lithium ion) should be used to distinguish between large and small batteries. However, the capacity of batteries listed above are generally lower than 600 Wh. The manufacturing costs and testing costs for these batteries are rather high too.
Modification proposal to the PRBA proposal ST/SG/AC.10/C.3/2008/46, 16 April 2008
Based on maintaining transport safety and current market for lithium ion battery in China, we propose to use a threshold of 300Wh on distinguishing large and small lithium ion batteries. China proposes the following modifications to the PRBA proposal ST/SG/AC.10/C.3/2008/46.
….
“Large battery means a lithium metal battery in which the aggregate lithium content of all anodes, when fully charged, is more than 80 g, or in the case of a lithium ion battery, means a battery with a Watt-hour rating of more than 600 300 Wh.”
….
“Small battery means a lithium metal battery composed of small cells, and in which the aggregate lithium content of all cell anodes, when fully charged, is not more than 80 g, or in the case of a lithium ion battery, means a battery with a Watt-hour rating of not more than 600 300 Wh.”
_______________
Annex
[pic]
Battery for electric bicycle: 36V, 360Wh, 3.86kg
-----------------------
ST/SG/AC.10/C.3/2007/31
page 2
Annex
ST/SG/AC.10/C.3/2007/31
page 1
Annex
ST/SG/AC.10/C.3/2007/31
page 3
Annex
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