Extending Lifespan: The Watering Techniques Industrial Battery Operators Overlook

A German logistics company with 80 electric forklifts experienced battery failures at 3.2 years instead of 5. Their forklift operators topped up batteries whenever they remembered — overfilling them, causing acid to spill through vent caps during charging.

Proper watering is one of the most impactful maintenance practices in industrial battery operation.

Why Water Loss Happens

In flooded lead-acid batteries, water is lost through electrolysis during charging and evaporation. Normal water loss rate: 0.1-0.3% of electrolyte volume per charge cycle at 25C.

The Overwatering Problem

Overwatering is as damaging as underwatering. Electrolyte contacts the vent cap, blocking gas escape; pressure builds; electrolyte is forced out; terminals and case corrode. Correct fill: 10-15mm below the vent well.

The Underwatering Problem

Underwatering exposes plate tops to air, causing permanent sulfation and capacity loss. Correct fill: cover plates by 25-50mm of electrolyte.

Proper Watering Procedure

When: Check every 5-10 cycles (weekly for high-utilization). Water after charging, never before. Water quality: deionized, distilled, or demineralized only.

Automated Watering Systems

For operations with 20+ batteries, automatic watering systems pay back in 8-14 months.

FAQ

Q: Use bottled water? A: No — only deionized, distilled, or demineralized water.

Q: Water before or after charging? A: Always after — charging causes electrolyte to expand.

Q: Fast water loss? A: Indicates overcharging. Check float voltage setting.

Need help? Contact CHISEN’s technical team.

Email: sales@chisen.cn

www.chisen.cn

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