Standard No.:	GB/T 46148-2025
English Name:	Technical specification for electric vehicle intelligent bi-directional power supply equipment
Chinese Name:	电动汽车智能充放电设备技术规范
Chinese Classification:	K81    AC/DC supply units
Professional Classification:	GB    National Standard
Source Content Issued by:	SAMR; SAC
Issued on:	2025-8-29
Implemented on:	2026-3-1
Status:	valid
Target Language:	English
File Format:	PDF
Word Count:	22000 words
Translation Price(USD):	660.0
Delivery:	via email in 1 business day

GB/T 46148-2025 Technical specification for electric vehicle intelligent bi-directional power supply equipment 1 Scope This document specifies the classification, equipment composition, operating conditions, functional requirements, safety requirements, and performance requirements for electric vehicle intelligent bi-directional power supply equipment, and describes the corresponding test methods. This document is applicable to intelligent bi-directional power supply equipment between electric vehicles and the power grid (hereinafter referred to as “bi-directional power supply equipment”), with a grid-side rated voltage not exceeding 1,000 V AC or 1,500 V DC, and an electric vehicle-side rated maximum voltage not exceeding 1,000 V AC or 1,500 V DC. This document is applicable to DC bi-directional power supply equipment adopting charging mode 4 with a permanent connection to the grid side, and AC bi-directional power supply equipment adopting charging mode 3 with case C connection as specified in GB/T 18487.1-2023. This document applies only to grid-connected bi-directional power supply equipment. This document does not apply to bi-directional power supply equipment connected to isolated grids. 2 Normative references The following normative 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 12325 Power quality - Deviation of supply voltage GB/T 12326 Power quality - Voltage fluctuation and flicker GB/T 14549 Quality of electric energy supply - Harmonics in public supply network GB/T 15543 Power quality - Three-phase voltage unbalance GB/T 15945 Power quality - Frequency deviation for power system GB/T 18487.1-2023 Electric vehicle conductive charging system - Part 1: General requirements GB/T 18487.5-2024 Electric vehicle conductive charging system - Part 5: DC charging system for GB/T 20234.3 GB/T 20840.2 Instrument transformers - Part 2: Additional requirements for current transformers GB/T 20840.3 Instrument transformers - Part 3: Additional requirements for inductive voltage transformers GB/T 24337 Power quality - Interharmonics in public supply network GB/T 29317-2021 Terminology of electric vehicle charging/battery swap infrastructure GB 39752-2024 Safety requirements of electric vehicle conductive supply equipment GB/T 40432-2021 Conductive on-board charger for electric vehicles GB 44263-2024 Safety requirements for electric vehicle conductive charging system NB/T 33001 Specification for electric vehicle off-board conductive charger NB/T 33002 Specification for electric vehicle AC charging spot NB/T 33008.1 Inspection and test specifications for electric vehicle charging equipment - Part 1: Off-board charger NB/T 33008.2 Inspection and test specifications for electric vehicle charging equipment - Part 2: A.C. charging spot NB/T 33021-2024 Specification for electric vehicle off-board bi-directional charger 3 Terms and definitions For the purposes of this document, the terms and definitions given in GB/T 18487.1-2023, GB/T 29317-2021 and NB/T 33021-2024 as well as the following apply. 3.1 electric vehicle intelligent bi-directional power supply equipment bi-directional power supply equipment connected between the electric vehicle (EV) or its traction battery and the power grid, capable of responding to upper‑level dispatching instructions and realizing bi‑directional energy transfer functions Note: For short, it is referred to as “bi-directional power supply equipment”. 3.2 forward energy transfer process in which the bi-directional power supply equipment transfers electric energy to the electric vehicle Note: Forward energy transfer is also referred to as “forward power transfer” or “charging”. 3.3 reverse energy transfer process in which the bi-directional power supply equipment transfers electric energy to the power grid Note: Reverse energy transfer is also referred to as “reverse power transfer” or “discharging”. 3.4 bi-directional energy transfer including forward energy transfer and reverse energy transfer Note: In GB/T 18487.1-2023, bi-directional energy transfer is referred to as “bi-directional power flow” or “charging and discharging”. 3.5 on-board charging and discharging charger equipment that is permanently installed inside an electric vehicle, capable of both converting the supply power into DC power to charge the EV traction battery, and converting the DC power from the EV traction battery into AC power for discharging to the outside through the AC charging coupler 3.6 electric vehicle AC bi-directional charging system system that can both provide AC power supply to the EV on-board charging and discharging charger, and enable the electric energy from the EV on-board charging and discharging charger to be discharged to the outside. During the discharging process, the on-board charging and discharging charger performs functions such as energy conversion, and power regulation, and meets the corresponding performance requirements Note: The schematic diagram for the energy flow of the electric vehicle AC bi-directional charging system is shown in Figure 1.

Contents Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 General requirements 5 Classification 6 Equipment composition 7 Operating conditions 8 Functional requirements 9 Safety requirements 10 Performance requirements 11 Test methods Annex A (Normative) Determination method for response time and control deviation of set power value control