High-precision 1–6S protection board tester for ternary, LFP, LCO and LMO packs. Supports rapid, PBTS(M), accurate and lab modes to verify OV/UV, recovery, delay, over-current, equalisation, self-consumption and internal resistance. Programmable 0.5–5 V (±1 mV), up to 120 A with ±0.1 A accuracy, USB-RS232 connection, Excel reports and barcode auto-start for production, IQC, QC and R&D.
The Semco SI-Y BMST 1–6S (60A/120A) is a dedicated lithium battery protection board safety and function tester designed for 1–6-series BMS/PCBs. It validates whether functional indicators stay within defined limits, giving production, IQC and R&D teams a repeatable standard to improve yield and quality control. It supports positive/negative split-port, same-port, charge-protect/discharge-protect topologies commonly used with ternary, LFP, LCO and LMO cells.
Four test modes cover the full workflow:
Rapid Test – upper/lower design limits for high-throughput shipment checks.
PBTS(M) Mode – evaluates protection delay at configurable speeds.
Accurate Test – measures key parameters with ±1 mV precision for debugging and development.
Lab Mode – independently programs each string from 0.5–5 V, simulates charge/discharge, checks MOS on/off state and monitors per-string operating current to validate equalisation and protection behaviour.
Core test items include internal resistance, individual overcharge/over-discharge and recovery voltage, OC/OD delay, charge/discharge protection current, over-current delay, secondary OC/OD delay, equalisation current/voltage and true per-cell self-consumption. A 120 A high-current module (±0.1 A) and programmable voltage module (0.5–5 V, ±1 mV) ensure realistic stress testing.
The upper-computer software (USB–RS232) coordinates the entire system, performs data acquisition and automatically generates Excel reports for traceability. It supports barcode self-start/manual start, pass/fail judgement based on user-defined specs and C++/C# DLLs for secondary development, enabling custom automated test flows or lab calibration processes.
| Item | Specification |
|---|---|
| Model | Semco SI-Y BMST 1–6S (60A/120A) |
| Test Strings | 1–6 |
| Voltage Range / Resolution | 0.5–5 V / 1 mV |
| OC Current Protection | 3–60 A, 0.1 A resolution |
| OD / Over-current Protection | 3–120 A, 0.1 A resolution |
| Delay Resolution | 1 ms (0–20 s / 0–10 s) |
| Equalisation Current / Voltage | 0–200 mA, 0.5–5 V |
| Self-Consumption | 0–500 µA / 0.5–200 mA |
| Internal Resistance | 0–200 mΩ, 1 mΩ resolution |
| Communication / Data Output | USB–RS232, Excel data sheets |
| Chassis Size / Weight / Channel | 430×420×190 mm, ~13 kg, 1 channel (600 W max) |
A high-precision Battery Management System (BMS) Tester ( Semco SI-Y BMST 1-6S (60A/120A) )designed for lithium battery protection board testing. This advanced equipment ensures accurate evaluation of functional parameters, improving quality control, R&D testing, and production efficiency.
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