GB/T 45417-2025 Guidelines for defect analysis of vehicle regenerative braking function
1 Scope
This document provides guidance for defect analysis of regenerative braking function that may cause vehicle driving safety problems, including basic process of defect analysis, defect clue collection, correlation analysis between defect clues and regenerative braking function, risk assessment and defect determination, and disposal measures.
This document is applicable to motor vehicles of Categories M, N with regenerative braking function.
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 13594 Antilock braking performance and test procedure for motor vehicles and their trailers
GB/T 15089 Classification of power - Driven vehicles and trailers
GB/T 19596 Terminology of electric vehicles
GB 21670 Technical requirements and testing methods for passenger car braking systems
GB/T 34402 Safety of motor vehicle product - Guidelines for risk assessment and risk control
GB/T 43387 Product recall - Vocabulary
3 Terms and definitions
For the purpose of this document, the terms and definitions given in GB/T 13594, GB/T 15089, GB/T 19596, GB 21670, GB/T 34402, GB/T 43387 and the following apply.
3.1
regenerative braking function
function of converting the kinetic energy of the vehicle into electrical energy during taxiing, deceleration or downhill
3.2
regenerative braking system
hardware and software system that realizes the regenerative braking function
3.2.1
regenerative braking system of category A
regenerative braking systems that are not part of the service braking system
[Source: GB 21670-2008, 3.1.16.2, modified]
3.2.2
regenerative braking system of category B
regenerative braking systems that are a part of the service braking system
[Source: GB 21670-2008, 3.1.16.3, modified]
3.3
defect
the situations that do not meet the national standards and industry standards for ensuring personal and property safety, or other unreasonable dangers endangering personal and property safety and generally existing in the motor vehicle products of the same batch, model or category
[Source: GB/T 43387-2023, 3.1, modified]
3.4
defect clue
information that the product may be defective
Note: Including accident investigation, consumer complaints, online public opinion and overseas recall information, etc.
[Source GB/T 43387-2023, 5.3, modified]
3.5
defect analysis
technical analysis activity conducted by manufacturers, recall authorities, or recall technical agencies regarding the existence of defects in products
3.6
risk assessment
process of determining the comprehensive level of severity and probability of occurrence of a hazardous event or situation
[Source: GB/T 43387-2023, 5.13]
4 Basic process of defect analysis
The basic process of defect analysis mainly includes:
a) Defect clue collection;
b) Correlation analysis between defect clues and regenerative braking function;
c) Risk assessment and defect determination: Mainly including the severity analysis of dangerous events or situations caused by regenerative braking function, the possibility analysis of dangerous events or situations caused by regenerative braking function, determining the comprehensive risk level of regenerative braking function, and carrying out defect determination;
d) Take corresponding disposal measures according to the defect determination results of regenerative braking function.
Contents Foreword i Introduction ii 1 Scope 2 Normative references 3 Terms and definitions 4 Basic process of defect analysis 5 Defect clue collection 6 Correlation analysis between defect clues and regenerative braking function 7 Risk assessment and defect determination 8 Disposal measures Bibliography
