Standard No.:	GB 29743.3-2025
English Name:	Motor vehicle coolant—Part 3: Fuel cell vehicle coolant
Chinese Name:	机动车冷却液 第3部分：燃料电池汽车冷却液
Chinese Classification:	R16    Highway vehicle utilization, maintenance and service
Professional Classification:	GB    National Standard
ICS Classification:	03.220.20 03.220.20    Road transport 03.220.20
Source Content Issued by:	SAMR; SAC
Issued on:	2025-08-29
Implemented on:	2026-3-1
Status:	valid
Target Language:	English
File Format:	PDF
Word Count:	12500 words
Translation Price(USD):	375.0
Delivery:	via email in 1 business day

GB 29743.3-2025 Motor vehicle coolant—Part 3: Fuel cell vehicle coolant English, Anglais, Englisch, Inglés, えいご Motor vehicle coolant - Part 3: Fuel cell vehicle coolant 1 Scope This document specifies the product classification, technical requirements and test methods, inspection rules, and marking, packaging, transportation and storage of fuel cell vehicle coolants. This document is applicable to the production, inspection and use of fuel cell vehicle coolant formulated with ethylene glycol as the main antifreeze raw material in the thermal management system of fuel cell vehicle stacks. 2 Normative references The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 3190 Chemical composition of wrought aluminium and aluminium alloys GB/T 3620.1 Designation and composition of titanium and titanium alloys GB/T 5231 Designation and chemical composition of wrought copper and copper alloys GB/T 6682-2008 Water for analytical laboratory use - Specification and test methods GB/T 15115 Aluminium die-cast alloy GB/T 20878 Stainless steels - Designation and chemical composition GB 29743.2-2025 Motor vehicle coolant - Part 2: Electric vehicle coolant GB/T 39937-2021 Plastics - Extruded sheets of polypropylene (PP) - Requirements and test methods GB/T 40169-2021 Compression-moulded plates of ultra-high-molecular-weight polyethylene (PE-UHMW) and high density polyethylene (PE-HD) JT/T 1230 Standard test method for determination of inorganic anions in motor vehicle engine coolant - Ion chromatography NB/SH/T 0164 Petroleum and related products packaging, storage, transportation and acceptance of delivery rules NB/SH/T 0828 Standard test method for determination of silicon and other elements in engine coolant by inductively coupled plasma-atomic emission spectroscopy SH/T 0065 Sampling of test samples of engine coolant or antirust agent and preparation of its aqueous solution SH/T 0066 Standard test method for foaming tendencies of engine coolants in glassware SH/T 0067 Determination method for ash content in engine coolant and antirust agent SH/T 0068 Standard test method for density or relative density of coolant concentrates and engine coolants by the hydrometer SH/T 0069 Determination of PH value of engine antifreezes, antirusts and coolants SH/T 0084 Standard test method for effect of cooling system chemical solutions on organic finishes for automotive vehicles SH/T 0086 Standard test method for water in engine coolant concentrate (Karl Fischer method) SH/T 0089 Standard test method for boiling point of engine coolants SH/T 0090 Standard test method for freezing point for engine coolants SH/T 0604 Crude petroleum and petroleum products - Determination of density - Oscillating U-tube method 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 fuel cell vehicle coolant functional liquid compounded with antifreeze, corrosion inhibitor and other raw materials, which is used in thermal management system of fuel cell vehicle stacks and has the functions of cooling, insulation, anti-corrosion and anti-freezing Note: The coolant taken directly from the product's original packaging is usually referred to as "bulk", which can be either coolant concentrate or coolant predilute. 3.2 fuel cell vehicle coolant concentrate coolant with a moisture content not exceeding 5%, diluted and used in the thermal management system of fuel cell vehicle stacks 3.3 fuel cell vehicle coolant predilute coolant with a specific freezing point, directly used in the thermal management system of fuel cell vehicle stacks 4 Product classification

Contents Foreword i Introduction ii 1 Scope 2 Normative references 3 Terms and definitions 4 Product classification 5 Technical requirements and test methods 6 Inspection rules 7 Marking, packaging, transportation and storage Annex A (Normative) Test methods for fuel cell vehicle coolant conductivity Annex B (Normative) Test methods for fuel cell vehicle coolant thermodynamic parameter Annex C (Normative) Test method for static corrosion of fuel cell vehicle coolant Annex D (Normative) Test method for corrosion of fuel cell vehicle coolant circulation bench Annex E (Normative) Test method for compatibility of fuel cell vehicle coolant and rubber materials Annex F (Normative) Test method for stability of fuel cell vehicle coolant Annex G (Normative) Test method for compatibility of fuel cell vehicle coolant and deionizer