Passive Balancing High-Voltage BMS

Key Functions

• Supports 3S–256S battery systems with system voltage up to 1000V.
• Supports 20–900A continuous current and peak current up to 3× the rated continuous current.
• Supports LTO, LiFePO4, NMC/NCA, sodium-ion and solid-state battery configurations.
• mV-level voltage detection, mA-level current detection and ms-level protection response.
• Stores up to 400 rolling alarm records for historical fault analysis.
• Bluetooth connection supports iOS and Android devices.
• APP supports 14 languages with voltage, temperature, current, capacity and parameter monitoring.
• Standard package includes collection wires and buzzer.
• Protection includes overcharge, over-discharge, over-temperature, low-temperature, over-current and short-circuit protection.
• Two-level protection parameters are supported for voltage, current and temperature.
• Manual, automatic and deep sleep modes are supported with near-zero power consumption in deep sleep.
• Heating function is supported across the series.
• Supports first power-on activation, charging activation and load activation after sleep.
• Supports 0.1–2A passive balancing.
• Supports 2.0-inch and 4.3-inch displays, inverter communication, GPS tracking and 2G/3G/4G network expansion, with Wi-Fi expansion supported.

Applications

• Residential Energy Storage
• Commercial & Industrial Energy Storage
• Large Marine & Yacht Energy Storage
• Racing Boats
• Sightseeing Vehicles
• Special-Purpose Vehicles
• Construction & Material Handling Equipment
• Electric Forklifts

Core Technology

• Master-Slave Cascaded Architecture

  A master controller with multiple slave modules provides segmented management and scalable expansion for large high-voltage battery systems.

• High-Voltage Platform up to 1000V

  Designed to meet the requirements of large-scale energy storage and high-voltage power battery systems.

• Modular Distributed Management

  Each slave module independently manages its battery section for easier system expansion and fault localization.

• Independent Pre-Charge Control

  A dedicated pre-charge relay and resistor reduce inrush current during high-voltage system startup.

• Real-Time Pre-Charge Detection

  Pre-charge status is determined by load-side voltage changes rather than relying only on a fixed time delay.

• Dual-Side Voltage Detection

  Battery total voltage and load-side voltage are monitored simultaneously for improved system status detection.

• Centralized High-Voltage Circuit Control

  The master controller centrally manages pre-charge, charge and discharge relays together with overall system operating logic.

• Time-Division Balancing and Sampling

  Balancing and voltage sampling operate separately to reduce measurement interference caused by balancing current.

• 1mV Cell Voltage Resolution

  Individual cells are independently monitored with voltage measurement resolution down to 1mV.

• Multi-Level Fault Response

  Different fault conditions can trigger alarms, charging shutdown, discharging shutdown or high-voltage circuit control.

• Hardware-Software Coordinated Protection

  Software protection logic works together with high-voltage relay control to enhance system-level protection.

• Integrated PDU / High-Voltage Box Solution

  A pre-integrated high-voltage control box reduces component selection, wiring and assembly work for system integrators.

• Highly Configurable High-Voltage System

  Series count, voltage, current, relays, shunts and pre-charge configurations can be tailored to specific project requirements.