GB/T 47136-2026 Specification for health and safety states assessment of traction battery for battery electric vehicles English, Anglais, Englisch, Inglés, えいご
This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered.
ICS 13.220.10
CCS H 57
National Standard of the People's Republic of China
GB/T 47136-2026
Specification for health and safety states assessment of traction battery for battery electric vehicles
纯电动汽车动力蓄电池健康与安全状态评估规范
Issue date: 2026-01-28 Implementation date: 2027-02-01
Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
the Standardization Administration of the People's Republic of China
Contents
Foreword
1 Scope
2 Normative References
3 Terms and Definitions
4 Assessment Process
5 Assessment Index System
6 Calculation Methods
6.1 General Requirements
6.2 Index Calculation
6.3 Index System Calculation
7 Assessment Results and Application
7.1 Health Status Assessment Results
7.2 Safety Status Assessment Results
7.3 Application of Assessment Results
Annex A (Informative) Calculation Method for the Total Safety Status Score of Traction Batteries in Battery Electric Vehicles
Annex B (Normative) Report for the Health Status Assessment Results of Traction Batteries in Battery Electric Vehicles
Annex C (Normative) Report for the Safety Status Assessment Results of Traction Batteries in Battery Electric Vehicles
Bibliography
Specification for the Assessment of Traction Battery Health and Safety Status for Battery Electric Vehicles
1 Scope
This document specifies the assessment process, assessment index system, calculation methods, assessment results, and application for the evaluation of the health and safety status of traction batteries in battery electric vehicles.
This document applies to activities assessing the health and safety status of in-service traction batteries used in battery electric vehicles based on operational data. Assessments of the health and safety status of traction batteries used in other scenarios may refer to this document. This document applies to ternary lithium batteries and lithium iron phosphate batteries; other types of traction batteries may refer to this document.
2 Normative References
The following documents contain provisions which, through normative reference in this text, constitute essential provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 19596—2017 Electric vehicles - Terminology
GB/T 32895—2025 Communication protocol for swapable battery pack of electric vehicles
GB/T 32960.3—2025 Technical specifications of remote service and management system for electric vehicles - Part 3: Communication protocol and data format
GB/T 38661—2020 Technical specification of battery management system for electric vehicles
GB/T 45415—2025 Analysis method of fire risk for battery electric vehicles
3 Terms and Definitions
For the purposes of this document, the terms and definitions given in GB/T 19596—2017 and GB/T 45415—2025 and the following apply.
3.1 state-of-health; SOH
A parameter calculated by integrating changes in indicators such as the traction battery's capacity, voltage, internal resistance, and usage behavior, used to measure the degree of health of the traction battery.
3.2 state-of-safety; SOS
A parameter analyzed based on the degree of abnormality in indicators such as the traction battery's state-of-health, electrical safety, and thermal safety, used to measure the risk level of the traction battery.
3.3 state-of-charge; SOC
The percentage of the capacity currently available in a traction battery, dischargeable under specified conditions, relative to its available capacity.
[SOURCE: GB/T 19596—2017, 3.3.3, 3.3.5, 4.3][SOURCE: GB/T 19596—2017, 3.3.3, 3.3.5, 4.3]
3.4 capacity retention rate
The percentage ratio of the traction battery's current available capacity to its rated capacity as declared by the manufacturer.
3.5
voltage deviation mean value change
The amount by which the mean value of the voltage deviation of each minimum parallel unit of the traction battery increases or decreases.
3.6
voltage range root mean square
The square root of the average of the squared differences between the highest voltage and the lowest voltage among the minimum parallel units of the traction battery.
3.7
consistency of internal resistance
The percentage difference from "1" of the ratio of the maximum DC internal resistance to the minimum DC internal resistance among the minimum parallel units of the traction battery.
3.8
cumulative number of charge-discharge cycles
The ratio of the total externally connected charged capacity accumulated by the traction battery from the time of manufacture to the present, relative to its rated capacity as declared by the manufacturer.
3.9
cumulative years of service
The time elapsed for the traction battery from the time of manufacture to the present.
NOTE: The unit is years.
3.10
monthly average number of charge-discharge cycles
The ratio of the externally connected charged capacity accumulated by the traction battery within a standard month, relative to its rated capacity as declared by the manufacturer.
NOTE: A standard month is recorded as 30 days.
3.11
annual decline rate of SOH
Within the interval between two consecutive assessments, the percentage ratio of the decrease in the traction battery's state-of-health (SOH) to its SOH value from the previous assessment.
NOTE: One assessment interval refers to a period of not less than a standard year.
NOTE: A standard year is recorded as 365 days.
3.12
usage behavior
User usage activities that characterize the usage intensity, usage duration, and usage frequency of the traction battery.
3.13
highest alarm level
The highest level of general alarm faults specified in GB/T 32960.3 or GB/T 32895.
3.14
second-highest alarm level
The level of general alarm faults immediately below the highest alarm level (3.13).
3.15
defect analysis
Technical analysis activities conducted by production, recall authorities, or recall technical institutions regarding the existence of defects in a product.
[SOURCE: GB/T 45415—2025, 3.4]
4 Assessment Process
The assessment process for the health and safety status of traction batteries is shown in Figure 1, including the following content.
