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Proposals to UN transport regulation Samsung SDI

Proposals to UN transport regulation Samsung SDI. Oct 2 nd 2013. UN test condition proposal T7. Overcharge test. Concern - Wording for purpose of overcharge test can mislead to conduct the test even for battery without overcharge protection.

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Proposals to UN transport regulation Samsung SDI

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  1. Proposals to UN transport regulation Samsung SDI Oct 2nd 2013

  2. UN test condition proposal T7. Overcharge test • Concern- Wording for purpose of overcharge test can mislead to conduct the test even for battery without overcharge protection. - Purpose of Overcharge test is to check whether the protection works properly. And this is why the standard doesn’t requires the test on batteries without protection. • Proposal - Purpose : The test evaluates the overcharge protection works properly in a overcharge condition.

  3. UN test condition proposal T7. Overcharge test • Concern - Charging current “manufacturer recommended max continuous charge current x 2” can be severe comparing other int. standards. - And this results permissible max charge current to be lower. • Proposal- Overcharge test current to be Max charge current (x1) 1) Nominal charge current for EV/PHEV is 1C. Reducing the charge current for safety purpose makes charging duration longer.

  4. UN test condition proposal T4. Mechanical shock test • ConcernBattery with large cells will weigh more than a large cell.Test condition mismatch. For example, large cell in a small battery • ConsiderationsCase1 : to simulate real car crash - No need to separate test condition for small and large batteries.Case2 : to simulate drop in manufacturing or logistics process. - Batteries composed of large cells will weigh more than a single large cell. Transportation process used to be limited by the weight of product. Transportation condition of heavy/large will not be severe than light/small one. • ProposalBatteries which is composed of large cells to be classified as Large battery.

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