1. Task Force 3: Electrolyte leakage Last update- 14/09/2015 1

2. Scope: Issues related to electrolyte leakage and venting Objective : Reply all the queries on this issue, provide justification for the requirements in GTR draft and if required propose test procedure. Organization of Task force: Scope & Objective 2

3. Status of open issue : IssueDiscussion StatusDraft text DefinitionsAgreedUnder discussion [venting] Aqueous electrolyteAgreed Non-aqueous electrolyte (corrosive nature) Agreed Non-aqueous electrolyte (Toxic nature) Agreed [Preamble text for GTR] Post crash: Observation periodUnder discussion VentingUnder discussion The ‘draft text proposal’ except ‘venting’ will be provided by the next IG-EVS meeting

4. Next steps Action items:  Further discussion on relevance of venting as validation criteria  Agreement on the post-crash observation period  Achieving group consensus on draft-text proposal from TF3 Meetings:  October: 1 face to face meeting in Europe (venting issue)  November: 1 audio meeting (final text proposal from TF3 and observation period)  January : 1 audio meeting if required  February: Face to face meeting before the EVS meeting in Japan

5. Annex

6. Acceptance criteria in present GTR draft : 6 Test itemLeakageRuptureFireExplosionIsolation Resistance Retention Vibration√√√√√- Thermal shock√√√√√- Fire resistance---√-- External short circuit√√√√√- Over discharge√√√√√- Over charge√√√√√- Over temperature√√√√√- REESS- Mechanical shock√-√√√- REESS- Mechanical integrity√-√√√- Vehicle – Post Crash√-√√√√ The fire test does not require leakage criteria and hence out of scope of this TF The ‘flammability aspect’ and the ‘electric shock aspect’ of electrolyte is already covered in the GTR draft Hence the objective of the task force is to look in to the chemical risk (corrosive & toxic nature of electrolytes) In-use Crash

7. Proposal : Definitions Insert the following new definitions (II. Text of Regulation ; 3. Definitions) Electrolyte leakage: Visible Escape of electrolyte from the REESS in the form of liquid. Aqueous electrolyte: An aqueous electrolyte is an electrolyte based on water solvent for the compounds (e.g. acids, bases) providing conducting ions after its dissociation. Non-aqueous electrolyte: A non-aqueous electrolyte is an electrolyte not based on water as the [main] solvent. [Venting: Venting means the release of gases due to excessive internal pressure from cell or battery in a manner intended by design to preclude rupture or explosion]

8. IssuePotential RiskUpdate 1Leakage in liquid form Flammable, Toxic, Corrosive Small amounts, order of millilitres, expected Agreed Text for draft proposal under discussion 2Vapor from leakage Toxic / flammable gas Agreed to discuss in phase 2 Preamble text proposal agreed 3Volatile gas Not expected in normal operation Under discussion 4Leakage in liquid form Flammable, Toxic, Corrosive Small amounts, order of millilitres, expected Agreed Text for draft proposal under discussion 5Vapor from leakage Toxic / flammable gas Agreed to discuss in phase 2 Preamble text proposal agreed Non-Aqueous Electrolytes : Issues In-use Post-crash