EC High Voltage BMS Active Balancing Control Box

Key Functions

• Supports 3S–256S battery systems with system voltage up to 1000V.
• Supports 20–900A continuous current and peak current up to 3× continuous current.
• Supports LTO, LiFePO4, NMC/NCA, sodium-ion and solid-state batteries.
• mV-level voltage detection, mA-level current detection and ms-level protection response.
• Stores up to 400 rolling alarm records for historical protection analysis.
• Bluetooth supports iOS and Android devices.
• APP supports 14 languages with battery voltage, temperature, current, capacity and parameter settings.
• Standard configuration includes collection wires and buzzer.
• Supports overcharge, over-discharge, over-temperature, low-temperature, over-current and short-circuit protection.
• Two-level protection parameters are supported for voltage, current and temperature.
• Supports manual sleep, automatic sleep and deep sleep with near-zero power consumption.
• Heating function is supported across the full series.
• Supports first power-on activation, charging activation and load activation after sleep.
• Supports 1–2A active balancing.
• Supports 2.0-inch and 4.3-inch display expansion.
• Supports inverter communication.
• Supports GPS tracking and 2G / 3G / 4G remote communication with Wi-Fi expansion support.

Applications

• Residential Energy Storage
• Commercial & Industrial Energy Storage
• Large Yacht & Marine 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 enables segmented management and flexible expansion for large high-voltage battery systems.

• High-Voltage Platform up to 1000V

  Designed for large-scale energy storage and high-voltage power battery systems with scalable system configurations.

• 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 control the high-voltage startup process to reduce inrush current to capacitive loads.

• Real-Time Pre-Charge Detection

  The system evaluates pre-charge status based on load-side voltage changes before closing the main relay.

• Dual-Side Voltage Detection

  Battery-side total voltage and load-side output voltage are monitored simultaneously for more accurate high-voltage system status detection.

• Centralized High-Voltage Circuit Control

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

• Relay-Based High-Voltage Switching

  External relays or contactors control the high-voltage main circuit and can be configured according to the required system current.

• Common-Port / Separate-Port Configuration

  Supports either shared or independent charge and discharge circuits to match different system architectures.

• Shunt-Based Current Measurement

  An external shunt measures system current and can be selected according to the actual current requirements of the project.

• Time-Division Balancing and Sampling

  Voltage sampling is separated from balancing operation to reduce measurement interference caused by balancing current.

• Segmented Temperature Monitoring

  Temperature sensors can be distributed across different battery sections for multi-zone thermal monitoring of large battery packs.

• 1mV Cell Voltage Resolution

  Each slave module independently monitors individual cells 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 disconnection.

• Hardware-Software Coordinated Protection

  Protection combines software-based monitoring and decision logic with high-voltage relay control for physical circuit isolation.

• Flexible Component-Level Integration

  Master modules, slave modules, relays, shunts and pre-charge components can be supplied separately for customized system integration.

• 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 components can be configured according to specific project requirements.

• Multi-Chemistry Battery Compatibility

  System parameters can be configured for different battery chemistries to support a wide range of high-voltage battery projects.

• Energy Storage and High-Power Applications

  The scalable architecture supports energy storage, industrial vehicles, marine systems and other high-voltage power applications.