QC/T 1241-2025 Specifications and test methods for hybrid electric drive system ofelectric vehicles English, Anglais, Englisch, Inglés, えいご
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ICS
T
Professional Standard of the People's Republic of China
QC/T 1241-2025
Specifications and test methods for hybrid electric drive system of electric vehicles
电动汽车用混合动力电驱动系统技术要求及试验方法
(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 Technical Requirements
4.1 General Items
4.2 Input/Output Characteristics
4.3 Thermal Balance and Lubrication Performance
4.4 Sealing Performance
4.5 Reliability
4.6 Environmental Adaptability
4.7 Electromagnetic Compatibility Performance
4.8 Vibration and Noise Performance
5 Test Methods
5.1 Test Preparation
5.2 General Test Items
5.3 Input/Output Characteristics Tests
5.4 Thermal Balance and Lubrication Performance Tests
5.5 Sealing Performance Tests
5.6 Reliability Tests
5.7 Environmental Adaptability Tests
5.8 Electromagnetic Compatibility Tests
5.9 Vibration and Noise Tests
6 Marking, Packaging, Transportation, Storage
6.1 Leads and Terminals
6.2 System Nameplate
6.3 Packaging
6.4 Transportation
6.5 Storage
6.6 Hazard Warnings
Technical Requirements and Test Methods for Hybrid Electric Drive Systems Used in Electric Vehicles
1 Scope
This document specifies the terms and definitions, technical requirements, test methods, and inspection rules for hybrid electric drive systems used in electric vehicles (hereinafter referred to as "systems").
This document applies to hybrid electric drive systems for vehicles of category M. It may be used as a reference for other vehicle categories.
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 1971 Terminal markings and direction of rotation for rotating electrical machines
GB/T 6882-2016 Acoustics-Determination of sound power levels and sound energy levels of noise sources using sound pressure-Precision methods for anechoic rooms and hemi-anechoic rooms
GB/T 15089 Classification of power-driven vehicles and trailers
GB 18384 Safety requirements for electric vehicles
GB/T 18488-2024 Drive motor system for electric vehicles
GB/T 19596 Terminology of electric vehicles
GB/T 30512 Requirements for prohibited substances in automobiles
QC/T 1132 Measurement method of noise emitted by electric power-train for electric vehicles
ISO 21498 Electrically propelled road vehicles-Electrical specifications and tests for voltage class B systems and components
3 Terms and Definitions
For the purposes of this document, the terms and definitions given in GB/T 19596 and the following apply.
3.1 hybrid electric drive system
A device capable of deriving propulsion power from at least two of the following onboard energy sources:
- Consumable fuel;
- Electrical energy storage device.
Note: The structure includes, but is not limited to, a system composed of drive motor(s), generator(s), dynamic coupling device(s), and motor controller(s).
3.2 dynamic coupling device
A device that executes control strategies to achieve power coupling in a hybrid electric drive system.
Note: The structure includes, but is not limited to, gear transmission mechanism(s), cooling/lubrication mechanism(s), mode switching actuator(s), and control unit(s).
3.3 system efficiency
The percentage of the total output power relative to the total input power of the hybrid electric drive system, including mechanical and electrical energy.
3.4 pure electric mode
An operating mode where propulsion power is provided solely by the drive motor(s), using energy only from the electrical energy storage device(s).
3.5 series mode
An operating mode where the engine, generator(s), and drive motor(s) are all operational. Propulsion power is provided by the drive motor(s), and the engine drives the generator(s) to produce electricity.
3.6 parallel mode
An operating mode where the engine, generator(s), and drive motor(s) can all participate in operation, and at least two power sources provide propulsion power simultaneously.
3.7 direct drive mode
An operating mode where neither the generator(s) nor the drive motor(s) participate in propulsion, and the engine serves as the sole power source providing propulsion force.
4 Technical Requirements
4.1 General Items
4.1.1 Component Materials
Raw materials used in the system shall comply with the requirements of GB/T 30512.
4.1.2 Appearance
4.1.2.1 The external surface of the system shall be free of obvious damage and deformation. Coatings shall be intact without damage.
4.1.2.2 The leads or terminals of the system shall be complete and undamaged. Fastener connections shall be secure and not loose.
4.1.2.3 The color coding and routing of high-voltage wiring harnesses shall be clearly distinguishable. Low-voltage wiring harnesses shall be arranged neatly and orderly.
4.1.2.4 If a nameplate is installed, it shall be mounted squarely and securely, with clear and legible lettering.
4.1.3 Insulation Resistance
When tested according to the method specified in 5.2.1, the insulation resistance shall comply with the requirements of GB/T 18488-2024, clause 5.1.4.
4.1.4 Voltage Withstand
When tested according to the method specified in 5.2.2, the voltage withstand capability shall comply with the requirements of GB/T 18488-2024, clause 5.1.5.
4.1.5 General Performance Requirements
4.1.5.1 Shaft Voltage
When tested according to the method specified in 5.2.4, the peak-to-peak shaft voltage of each motor in the system under both steady-state and dynamic operating conditions shall comply with the specifications in the product technical documentation.
4.1.5.2 Torque Loss
When tested according to the method specified in 5.2.5, when the oil temperature reaches 60 °C, the maximum torque loss at the drive end in each operating mode shall not exceed 15 N·m, or shall comply with the requirements in the product technical documentation.
4.1.5.3 Overspeed Performance
When tested according to the method specified in 5.2.6, the system shall withstand a speed not less than 1.1 times the maximum operating speed of the motor for a duration not less than 2 minutes. After the test, the system performance shall comply with the requirements in the product technical documentation.
4.1.5.4 Ripple Immunity Performance
When tested according to the method specified in 5.2.7, the operating state of the system
