QC/T 1236-2025 Cooling pump for fuel cell systems English, Anglais, Englisch, Inglés, えいご
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ICS
T
Professional Standard of the People's Republic of China
QC/T 1236-2025
Cooling pump for fuel cell systems
燃料电池发动机用冷却水泵
(English Translation)
Issue date: 2025-12-17 Implementation date: 2026-07-01
Issued by the Ministry of Industry and Information Technology of the People's Republic of China
Contents
Foreword
1 Scope
2 Normative References
3 Terms and Definitions
4 Instrument and Equipment Requirements
5 Operating Modes
5.1 Operating Mode 1
5.2 Operating Mode 2
6 Technical Requirements
6.1 General Requirements
6.2 Operating and Mechanical Characteristics
6.3 Electrical Characteristics
6.4 Environmental Adaptability
6.5 Prohibited Substances
6.6 Durability
7 Test Methods
7.1 General Provisions
7.2 Operating and Mechanical Characteristics
7.3 Electrical Characteristics
7.4 Environmental Adaptability
7.5 Prohibited Substances
7.6 Durability
8 Inspection
Appendix A (Normative) Calculation Formulas
Appendix B (Informative) Cooling Water Pump Performance Test Data Record Form
Appendix C (Informative) Cooling Water Pump Performance Curves
Cooling Water Pump for Fuel Cell Engines
1 Scope
This document specifies the technical conditions, test methods, inspection rules, and requirements for marking, packaging, transportation, and storage of cooling water pumps for fuel cell engines.
This document applies to cooling water pumps used in fuel cell engines for road vehicles with a maximum operating voltage of Class B voltage (hereinafter referred to as cooling water pumps).
Note: Class B voltage refers to a maximum operating voltage greater than AC 30 V (RMS) and less than or equal to AC 1000 V (RMS), or greater than DC 60 V and less than or equal to DC 1500 V.
2 Normative References
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 2423.4-2008 Environmental testing for electric and electronic products-Part 2: Test methods-Test Db: Damp heat, cyclic (12 h + 12 h cycle)
GB/T 2423.56-2018 Environmental testing-Part 2: Test methods-Test Fh: Broadband random vibration and guidance
GB/T 3821-2015 Cleanliness limits and determination methods for small and medium power internal combustion engines
GB/T 4208-2017 Degrees of protection provided by enclosure (IP Code)
GB 18384-2020 Electric vehicles-Safety requirements
GB/T 18488-2024 Drive motor system for electric vehicles
GB/T 18655-2018 Vehicles, boats and internal combustion engines-Radio disturbance characteristics-Limits and methods of measurement for the protection of on-board receivers
GB/T 19951-2019 Road vehicles-Electrical disturbances from electrostatic discharge-Test methods for electrical/electronic sub-assemblies
GB/T 21437.2-2021 Road vehicles-Electrical disturbances from conduction and coupling-Part 2: Electrical transient conduction along supply lines only-Emission and immunity
GB/T 21437.3-2021 Road vehicles-Electrical disturbances from conduction and coupling-Part 3: Immunity to transient conduction on non-supply lines
GB/T 23263 Method for the determination of asbestos content in products
GB/T 24548 Terms for fuel cell electric vehicles
GB/T 28046.2-2019 Road vehicles-Environmental conditions and testing for electrical and electronic equipment-Part 2: Electrical loads
GB/T 28046.3-2011 Road vehicles-Environmental conditions and testing for electrical and electronic equipment-Part 3: Mechanical loads
GB/T 28046.4-2011 Road vehicles-Environmental conditions and testing for electrical and electronic equipment-Part 4: Climatic loads
GB/T 29529-2013 Measurement and evaluation of pump noise
GB/T 30512 Requirements for prohibited substances in automobiles
GB/T 33014.2-2016 Road vehicles-Component test methods for electrical disturbances from narrowband radiated electromagnetic energy-Part 2: Absorber-lined shielded enclosure
GB/T 33014.4-2016 Road vehicles-Component test methods for electrical disturbances from narrowband radiated electromagnetic energy-Part 4: Bulk current injection (BCI) method
GB/T 33014.8-2020 Road vehicles-Component test methods for electrical disturbances from narrowband radiated electromagnetic energy-Part 8: Magnetic field immunity method
3 Terms and Definitions
For the purposes of this document, the terms and definitions given in GB/T 24548 and the following apply.
3.1
coolant
A low-conductivity liquid used in the cooling system of a fuel cell engine, having functions such as cooling, anti-corrosion, and anti-freezing. It is typically formulated from raw materials such as deionized water, antifreeze, and additives.
3.2
rated point
The operating point specified by the manufacturer at which the cooling water pump can operate stably at the rated speed.
Note: The conditions for this operating point include speed, flow rate, and head.
3.3
minimum steady point
The operating point specified by the manufacturer at which the cooling water pump operates stably at the minimum speed.
3.4
net positive suction head (NPSH)
For a given flow rate, the excess pressure of the liquid at the pump suction port over its vapor pressure, relative to the pump centerline.
3.5
required net positive suction head (NPSHr)
The minimum net positive suction head required for the cooling water pump to achieve its specified performance under the conditions of flow rate, speed, and pumped liquid stipulated by the manufacturer.
4 Instrument and Equipment Requirements
The accuracy of instruments and equipment shall comply with the requirements in Table 1.
Table 1 Accuracy Requirements for Instruments and Equipment
5 Operating Modes
5.1 Operating Mode 1
In Operating Mode 1, the cooling water pump is not energized. It is subdivided into the following two modes based on whether it is connected to a wiring harness:
a) Operating Mode 1.1: Not connected to a wiring harness;
b) Operating Mode 1.2: The mounting method, wiring harness, and piping connections of the cooling water pump shall comply with the provisions of the product technical documentation.
5.2 Operating Mode 2
In Operating Mode 2, all electrical connections of the cooling water pump are complete. The supply voltage, communication voltage, mounting method, wiring harness, and piping connections shall comply with the provisions of the product technical documentation. Based on the operating state of the cooling water pump, it is subdivided into the following three modes:
a)Operating Mode 2.1: The cooling water pump is not activated (e.g., in sleep mode);
b)b) Operating Mode 2.2: The cooling water pump is operating at the minimum steady point;
c)c) Operating Mode 2.3: The cooling water pump is operating at the rated point.
6 Technical Requirements
6.1 General Requirements
The product appearance shall be inspected visually. All exterior part surfaces shall show no rust, impact damage, or scratches. Coatings shall not peel off. Fastener connections shall be secure. Leads or terminals shall be intact and undamaged. Colors and markings shall be
