Customer decision guidline to ADL24LINMC-39AH-50A-CB

1. What to read from the status Excel (Realtime status sheet)

Have the customer open the Excel status file and note these values:

Electrical

• Soc (%)

• Total battery voltage (V)

• Current (A) — positive usually charge, negative discharge (depends on file)

• Cell 1 … Cell 7 (V)

• Cell max voltage (V)

• Cell min voltage (V)

• Cell voltage diff (V) = max − min

Temperature

• Cell temperature 1 / 2 (°C)

• Mos temperature (°C)

• Ambient temperature (°C)

Health / usage

• Cycles

• Design capacity (mAh)

• Full capacity (mAh)

• Remaining capacity (mAh)

Diagnostics

• Status flags (list)

2. Quick safety rules (always first)

1. If Status flags list contains OV, UV, OT, UT, OCD, OCC, SC
   → treat as a fault event. Follow the matching section below. If unclear, stop and contact WST.

2. Never charge below 0°C or above 55°C.
   Never discharge below −10°C or above 60°C.

3. Decision guideline by condition

A) Battery won’t turn on / no output

Check with voltmeter on pack terminals first.

• If pack voltage < 21.0 V
  (≈ 7 × 3.0 V UV limit)
  → battery is in undervoltage lockout.
  Action:

  • Connect WST charger immediately.

  • If it does not start charging within ~10–15 minutes, stop and contact WST.

  • Do not attempt recovery with non-WST chargers.

• If pack voltage ≥ 21.0 V but BMS still off
  → open status file. If Status flags show protection (UV/OC/OT etc), follow that section.
  If no clear reason: contact WST.

B) Undervoltage / battery too empty

From status file

• Any Cell min voltage ≤ 3.0 V OR

• Total battery voltage ≤ 21.0 V
  → BMS UV protection.

Action:

1. Stop discharging immediately.

2. Charge with WST charger ASAP.

3. After charging starts, re-check cells:

   • If a cell stays < 3.0 V while others rise → service case.

Early warning (before BMS trip):

• Cell min voltage 3.0–3.2 V OR

• Total voltage 21.0–22.4 V (≈ 7 × 3.2 V)
  → “low battery” zone.

Action:

• Charge now. Don’t continue heavy discharge.

C) Overvoltage / charging problem

From status file

• Any Cell max voltage ≥ 4.20 V (OV threshold)
  → BMS OV protection likely.

Action:

1. Stop charging. Disconnect charger.

2. Let battery rest 30–60 min.

3. Discharge battery for 10 min

4. Re-read status.

   • If all cells are < 4.00 V at rest and flags persist → contact WST.

Early warning:

• If a cell reaches 4.18–4.20 V while others are much lower
  → likely imbalance. Go to “Balancing” section.

D) Cell imbalance / needs balancing

Use Cell voltage diff.

Interpretation

• diff ≤ 0.010 V (10 mV) → excellent, no action.

• 0.010–0.050 V → acceptable, monitor only.

• 0.050-0.200 V → imbalance worth fixing.

• > 0.200 V → strong imbalance → treat seriously.

Balancing procedure (top-balance with WST charger)

1. Charge with WST charger to 100% SOC / full.

2. keep it at 100% SOC for 24 hours.

3. Re-read status file.

If after 1–2 top-balance cycles (Discharge to 10% and then full charge):

• diff still > 0.050 V OR

• one cell hits 4.20 V while another is < 4.00 V
  → STOP charging and contact WST (cell abnormality).

E) Temperature too high / too low

Use cell temps + ambient + MOS temp.

Charge temperature limits

• Too cold to charge: any temp < 0°C (CUT threshold)
  Action: Do not charge. Move battery to warmer area until > 5°C, then charge.

• Too hot to charge: any temp > 55°C (COT threshold)
  Action: Stop charging. Let cool to < 50°C before retrying.

Discharge temperature limits

• Too cold to discharge: any temp < −10°C (DUT threshold)
  Action: Stop use. Warm battery.

• Too hot to discharge: any temp > 60°C (DOT threshold)
  Action: Stop use immediately. Let cool.

If temps are normal but Status flags show OT/UT → contact WST.

F) Overcurrent flag (DOC / OCC / OCD/ SC)

• Discharge overcurrent thresholds are around >50A region.

If Status flags show overcurrent (DOC/OCD/OCC) but temps/voltages look fine:

1. Remove load / disconnect device.

2. Wait 10 minutes.

3. Reconnect and check if flag clears.

4. If it repeats with normal load → likely application issue or wiring fault.
   Action: stop use and contact WST with status file.

G) Capacity / aging check (health)

Compare Full capacity to Design capacity.

• Design capacity in file: 39600 mAh (≈39.6 Ah)

Health bands

• Full capacity ≥ 90% of design (≥ 35640 mAh) → good.

• 80–90% (31680–35640 mAh) → moderate aging, shorter runtime is normal.

• < 80% (< 31680 mAh) → heavily aged. Replacement is recommended.

Action

• Inform customer about reduced runtime.

• If within warranty or capacity drop is sudden → contact WST.

Cycles (rough guidance)

• < 300 cycles: normal for a young pack.

• 300–800: aging expected gradually.

• > 800: noticeable fade is normal; monitor more often.

4. “Normal use” window for customers

• SOC: 10–95% during regular use

• Cell voltages: 3.2 – 4.15 V

• Cell voltage diff: ≤ 0.03 V

• Total voltage (7s pack):

  • Typical mid-range: 24–27 V

  • Low warning below 22.4 V

  • Full around 29.0–29.4 V

• Temperature during use: 0 – 50°C ideal.

5. What the customer should send WST if there’s a problem

1. The latest status Excel file (right after the issue).

2. A photo of the voltmeter reading on pack terminals.

3. Description of:

   • what they were doing (charging/discharging, load type)

   • ambient temperature

   • whether the issue repeats