EP401 V4.0 is an all-in-one device for servicing and maintaining battery packs and modules of new energy vehicles. It provides charge/discharge maintenance, SOC/SOH health testing and BMS communication monitoring, helping technicians quickly complete battery inspection, repair verification and performance evaluation. A wide voltage range (DC 2–400V) and multi-channel acquisition (up to 120 cells and 20 temperature) cover common modules, while dual-mode operation (Expert/General) and compatibility with multiple battery types make the device flexible for different workshops.
SOH health assessment
One device covers diagnostics, charge test, discharge test and cell balancing — the complete EV battery maintenance workflow.
Module and pack in one
No need to change equipment — the device adapts to both modules and full packs.
Multi-channel acquisition
Up to 120 cell channels and 20 temperature channels with insight into cell status distribution.
BMS communication
Expanded diagnostic module with BMS communication enables testing and parameter reading without disassembling the pack.
Features
- Charging and discharging of battery packs and modules (DC 2–400V)
- Charging current up to 100A (max 4.4 kW), discharging up to 100A (max 7.2 kW)
- SOC/SOH health test with automatic SOH report
- BMS communication — testing without disassembling the full pack
- Up to 120 cell voltage channels and 20 temperature channels
- Expert and General operating modes
- Compatibility with Ni-MH, NMC, LFP and LTO batteries
- Real-time graphical display, data export and OTA upgrades
- 10.1″ LCD (1280×800), Wi-Fi, 32 GB storage
- Multiple protections: overcharge/over-discharge, temperature, current, reverse connection
Specifications
Power inputAC 100–240V, 50/60 HzVoltage rangeDC 2–400VCharging current0–100A, max 4.4 kWDischarging current0–100A, max 7.2 kWPack voltage accuracy±0.5% FS + 0.3V (max 400V)Cell voltage accuracy±0.1% FS + 5mV (max 5V)Cell current accuracy±0.5% FS + 0.2A (max 100A)Operating modesConstant current charging/dischargingProtectionsOvercharge/over-discharge, temperature, current, reverse, disconnectionDisplay10.1″ LCD, 1280×800CommunicationWi-FiStorage32 GB
