The 8A-4S is a high-current battery spot welder designed for assembling lithium battery packs with up to 4 series cells. It provides powerful and stable welding current, ensuring precise and reliable connections for small battery packs.
High-efficiency transformer & low-impedance MOS
MCU-driven auto-balancing with manual override.
Low-voltage cutoff & per-string overcurrent fuses.
Supports cascading for $>24$ series packs.
Li-ion/LiFePO4/LTO (Best for $<50$AH).
Auto / Manual (with timer).
Fully symmetrical isolated design.
Auto-stop on low energy to prevent power loss.
Solar Power Systems
RC/Aviation Battery Packs
Robotics (Sweepers/Vacuum)
Power Tools
| Balancing Precision | $0.005\text{V} (Minimum voltage difference) |
| Balancing Modes | Continuous / Time-limited (60 Minutes) |
| Interface | 3.81 Cable Interface |
| Power Supply Mode | Powered by the 4th string ($<5\text{mA}$, $12\text{V}$) |
| Max Balancing Current | 5A / 8A (Optional) |
| Supported Battery Types | Li-ion / LiFePO4 / LTO |
| Battery Strings | 4S |
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