Quick Start Guide
This step-by-step guide helps you get the most out of your AmpBox with the JK-BMS system. It covers setup, balancing, charger options, and troubleshooting — designed for tech DIYers who want a better understanding of their AmpBox JK-BMS system.
1. Initial Setup
- Connect & inspect: Hook up your AmpBox and inspect the JK-BMS LCD screen to view all cell voltages.
- Full charge: Perform an initial full charge to expose cell differences for balancing.
- Let it rest charged: Leave the pack fully charged for several hours to allow balancing.
- Cycle a few times: Discharge and recharge fully over several cycles to help cells align.
2. Understanding JK-BMS Balancing
Active Balancer Basics
- Moves energy from higher cells to lower ones (≈2A rate).
- Most active near the top of the charge curve.
- If charging fast, the top cell may trip cutoff and changing will be set to off while balancing continues — that’s normal.
- Once higher cells are below the high threshold, charging will begin set of on again, and charging will continue.
In practice: Charging may stop around ~95%. Repeated top-offs or low-amp charging fixes this.
LCD Screen Indicators
- Colors: High/low cells flagged (e.g., blue = high, red = low).
- Flashing: Balancer is actively transferring current.
- Check that energy is moving from high cells to low cells during top charge.
3. Charger Options for Balancing
Different chargers affect how quickly your pack balances. Here are three recommended options:
Option 1: High Current Charger
Fast charging (e.g. 18A). Convenient for daily use, but may cut off before balancing finishes.
[Click Here]
Option 2: Adjustable Bench Supply
Set to 1–3A for controlled top charging. Perfect for speeding up balancing.
[Click Here]Option 3: Dedicated 2A Charger
Our custom 2A charger, designed specifically for safe top balancing with AmpBox. Available soon in our shop.
[Shop product link]4. Troubleshooting
- Stops at ~95%: One cell hit cutoff first. Solution: repeat full charge cycles or use low-amp trickle.
- Small capacity loss early: Normal minor imbalance (2–5%), resolves after cycles.
- No balancing activity: Check app, wiring, and connections.
5. Final Notes
The AmpBox + JK BMS systems balance themselves naturally with use. For faster results, a low-amp charger or our dedicated 2A unit ensures top balancing from day one.
