GB/T 36558-2023 - Battery Design

General Technical Requirements for Electrochemical Energy Storage System of Power System

GB/T 36558-2023 specifies the general technical requirements for electrochemical energy storage systems (EESS) connected to or operating within power systems, covering operational conditions, power control capabilities, grid adaptability, and system performance criteria. It was issued on 28 December 2023 and became effective on 1 July 2024, replacing GB/T 36558-2018. The standard is primarily aimed at grid-connected BESS assets and sets out the baseline technical performance parameters that such systems must meet to operate reliably within the Chinese power grid.

Published by: Standardization Administration of China (SAC)

Current edition: GB/T 36558-2023 (effective 1 July 2024)

Replaces: GB/T 36558-2018

Status: Recommended (GB/T prefix) — referenced in BESS grid connection approvals and utility procurement specifications

Scope

GB/T 36558-2023 applies to electrochemical energy storage systems that are connected to or participate in power system operation, including:

Transmission-connected BESS: large-scale grid storage connected at high voltage for bulk energy management
Distribution-connected BESS: medium and low voltage BESS for distribution network support, including peak shaving and voltage regulation
Renewable energy co-located BESS: storage paired with wind and solar farms for output smoothing and curtailment reduction

Key Technical Requirements

Environmental operating conditions: ambient temperature -20°C to +50°C; relative humidity ≤90% non-condensing
Power control: active and reactive power output control with defined response times and accuracy requirements
Operational adaptability: requirements for grid voltage and frequency ride-through, including low-voltage fault crossing (LVRT) and high-voltage fault crossing (HVRT)
Energy conversion efficiency: minimum round-trip energy efficiency requirements at rated power
Primary frequency regulation: response speed and droop characteristics for frequency support service delivery
Inertia response: virtual inertia requirements for BESS contributing to system frequency stability
Black start capability: requirements for BESS that are designated to assist power system restoration following a blackout
Power quality: harmonic distortion, flicker, and DC injection limits

Related Standards

GB/T 36276-2023 — Battery cell and module requirements for EESS (the battery-component counterpart to this system-level standard)
UL 1741 — US equivalent covering inverters and grid-interconnection requirements for BESS
IEC 62619 — International battery safety requirements for industrial and BESS applications

Disclaimer: This is not a definitive guide, just an indication and it is important that you always go back to the source for legislation.