What Are Specs Of 48V 24-85-21 Hyster E50Z Battery?

The 48V 24-85-21 Hyster E50Z battery is a deep-cycle lead-acid configuration designed for electric forklifts. This 48V system typically comprises 24 cells (2V per cell) with a 21-hour rate capacity of 85Ah. It features AGM (Absorbent Glass Mat) technology for spill-proof operation, centralized front terminals for easy maintenance, and ABS casing for vibration resistance. Standard dimensions approximate 800L × 600W × 300H mm, weighing ~250kg. Operating range spans -15°C to 50°C, with a 10-year design life under proper maintenance.

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What’s the significance of “24-85-21” in the model code?

The code denotes 24 cells arranged in series, 85Ah capacity at 21-hour discharge. At 2V per cell, 24 cells create 48V nominal voltage. The 21-hour rate indicates 4A continuous draw (85Ah ÷ 21h = 4.05A) for full capacity utilization—critical for forklift endurance calculations.

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Deep Dive: The “24-85-21” identifier directly ties to performance benchmarks. Each 2V AGM cell delivers 85Ah when discharged over 21 hours at 25°C—equivalent to a 4.05A load. Pro Tip: Real capacity drops at higher currents; expect ~75Ah at the 5-hour rate (17A) common in Hyster E50Z operations. Thermal management is vital—capacity decreases 1% per °C below 20°C. For example, at -10°C, effective capacity shrinks to 68Ah (85Ah × 0.7). Transitional design elements like centralized venting (mentioned in technical specs) prevent acid stratification during partial-state charging cycles.

How does cell arrangement affect performance?

Series-connected 24 cells deliver required 48V, but parallel groups could boost capacity. However, AGM batteries prioritize voltage stability over capacity scaling in Hyster’s design.

Deep Dive: The 2×12 cell block configuration balances space efficiency and thermal dissipation in E50Z battery compartments. Unlike lithium alternatives, lead-acid cells can’t be densely packed due to gas recombination needs. Pro Tip: Never mix old/new cells—voltage imbalance accelerates sulfation. A real-world analogy: Think of the 24-cell array like a freight train—all cars (cells) must pull equally to maintain speed (voltage). If one weakens, the whole system strains. Transitionally, maintenance practices become paramount—monthly equalization charges at 2.4V/cell (57.6V total) help prevent stratification.

What distinguishes AGM chemistry in this application?

AGM’s immobilized electrolyte prevents acid spills during forklift tilting. Fiberglass mats between plates absorb electrolyte, enabling safe operation at angles up to 45°.

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Deep Dive: Compared to flooded lead-acid, AGM batteries in the E50Z exhibit 30% lower self-discharge (1.5% monthly vs. 2.5%). They also tolerate partial discharges better—400 cycles at 50% DoD versus 250 cycles for flooded types. But what happens during overcharging? AGM’s recombinant efficiency (98%+) minimizes water loss, yet requires precise voltage control—charge limiters at 57.6V ±0.5V are mandatory. For context, a faulty regulator charging at 60V would boil off electrolytes in 15 cycles. Transitionally, users must verify charger compatibility—Hyster OEM units include temperature-compensated algorithms.

How does capacity correlate with shift duration?

85Ah capacity supports 6–8 hours of moderate E50Z operation. Energy consumption varies with load weight—a 1,500kg lift at 5km/h draws ~20A, depleting the battery in ~4 hours.

Deep Dive: Calculating runtime requires analyzing duty cycles. If the E50Z’s motor draws 30A during acceleration phases (20% of operating time) and 15A cruising (80%), average consumption is 18A. With an 85Ah battery, theoretical runtime is 4.7 hours (85Ah ÷ 18A). Practically speaking, derate by 20% for battery aging and auxiliary loads (lights, hydraulics), yielding 3.8 hours. Pro Tip: Implement opportunity charging during breaks—a 15-minute boost at 30A replenishes 7.5Ah, extending shift time by 25 minutes.

What maintenance ensures maximum lifespan?

Monthly equalization charges at 57.6V and terminal cleaning are essential. Post-discharge recharge within 24 hours prevents sulfation—the prime cause of capacity loss.

Deep Dive: AGM batteries thrive on preventive care. Use a regulated equalizer to apply 57.6V for 2–4 hours monthly, redistributing electrolyte concentration. Terminal corrosion—often appearing as white powder—reduces conductivity by 40% if unchecked. Clean quarterly with baking soda solution and coat with anti-oxidant grease. Transitionally, storage practices matter—at 30% SoC in cool (10°C) environments slows self-dischapse. For example, a properly stored E50Z battery retains 70% charge after 6 months versus 30% at 25°C.

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