The 36V 18-110-11 XPB 1 forklift battery is a lead-acid traction battery engineered for industrial material-handling equipment. The model number decodes key specifications: 36V nominal voltage, 18-cell configuration (2V per cell), 110Ah capacity at the 5-hour discharge rate (C5), and XPB 1 designating case dimensions and terminal orientation. These batteries typically use heavy-duty plates with tubular positive construction for deep-cycle performance in Class I/II electric forklifts.
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What do the numbers in 18-110-11 XPB 1 signify?
Identifies the battery’s mechanical and electrical parameters: 18 cells (2V each for 36V system), 110Ah nominal capacity, and 11 designating case width in decimeters. XPB 1 refers to BCI terminal type (XPB) and first-generation design.
Breaking down the alphanumeric code: The 18-cell configuration (9 pairs of 2V cells) uses robust lead-antimony alloys for 1,500+ cycles at 80% depth-of-discharge. With 110Ah capacity, it delivers 3.96kWh gross energy (36V × 110Ah) – sufficient for 6–8 hours of moderate forklift operation. The 11 in the model number corresponds to 11dm (110cm) case width – a standardized dimension ensuring compatibility with battery compartments. Pro Tip: Always verify cell count matches voltage – 18 cells x 2V = 36V. Mismatches indicate counterfeit products. For example, a genuine XPB 1 battery weighs ≈590kg due to proper lead content, while substandard units may be 15-20% lighter.
How does capacity rating affect forklift runtime?
The 110Ah rating determines energy reserves – higher capacity extends operational hours but increases weight (≈590kg). Actual runtime depends on forklift load, travel frequency, and lift cycles.
Practical runtime calculations require understanding Peukert’s effect – lead-acid batteries deliver fewer Ah at higher discharge rates. While rated 110Ah at 22A (C5), drawing 55A reduces effective capacity to ≈85Ah. For a 36V forklift motor drawing 75A under load, the XPB 1 battery provides 85Ah/75A = 1.13 hours continuous use. However, real-world usage with intermittent operation typically achieves 4-5 hours. Maintenance practices like equalization charging (2.7V/cell for 3 hours monthly) preserve capacity. Comparatively, lithium-ion variants maintain 98% capacity at high discharge rates but cost 2-3x more upfront. For instance, a warehouse using 6-hour shifts would require midday charging with lead-acid but could operate full shifts with lithium.
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| Factor | Lead-Acid (XPB 1) | Lithium-Ion |
|---|---|---|
| Cycle Life | 1,500 cycles | 3,000+ cycles |
| Charge Time | 8-10 hours | 2-3 hours |
| Energy Density | 30-40Wh/kg | 100-150Wh/kg |
What maintenance ensures maximum lifespan?
Weekly water topping with DI water maintains electrolyte levels – plate exposure causes sulfation. Monthly equalization at 2.4V/cell (43.2V system-wide) balances cell voltages.
Proper maintenance follows three phases: Preventative (cleaning terminals with baking soda solution to prevent corrosion), Corrective (replacing cells with >15mV deviation during equalization), and Predictive (tracking specific gravity trends). Use a refractometer to check electrolyte SG – 1.265±0.005 at full charge. If SG varies >0.030 between cells, schedule equalization. For example, a battery showing 1.210 in cell 3 indicates 50% discharge – possible short circuit. Pro Tip: Install automatic watering systems to reduce maintenance time by 70% while preventing over/under-filling. Transitional note: Beyond fluid levels, temperature control is equally critical.
Redway Battery Expert Insight
FAQs
Yes, but confirm load requirements – forklift motors demand 300-500A bursts that exceed most industrial tools’ needs. Oversizing cables prevents voltage drops.
How often should terminal connections be inspected?
Biweekly torque checks (11-15 Nm for SAE terminals) prevent resistance buildup causing up to 10% energy loss. Apply anti-corrosion gel after cleaning.
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