Power Output Characteristics & Core Advantages of Lithium-ion New Energy Forklifts

(Compared Separately with Internal Combustion Forklifts & Lead-Acid Electric Forklifts; Focused on Power Characteristics, excluding pure range and maintenance topics)

I. Advantages in Instant Power & Torque Output (Core Driving & Operating Characteristics)

1. High constant torque at low speed; full torque available instantly upon start and liftingLithium-ion systems are matched with permanent magnet synchronous motors, which deliver rated maximum torque at zero rotational speed.

• Internal combustion forklifts: Low torque at low engine RPM. Drivers need to rev the engine for heavy-load start; prone to rolling back on ramps with loaded goods.
• Lithium forklifts: Maximum torque is output immediately when the accelerator is pressed. Robust response for heavy-load startup, ramp haulage and initial mast lifting.

Field performance: Sufficient power when climbing with full load; zero delay at the start of fork lifting. Better performance for frequent short-distance loading & unloading.

2. Linear and controllable power output without power discontinuityMotor torque can be continuously adjusted. There is no shift shock or throttle lag found in internal combustion engines. Smooth power transition during frequent forward/reverse switching (high-frequency loading/unloading operations), minimizing impact. Cargo shake and damage risks are reduced, while shock loads on masts, chains and tires are lowered.
3. Sustained power without degradation (Major difference: Lithium-ion vs Lead-acid)

• Lead-acid batteries: Voltage drops noticeably as state of charge declines. Once SOC falls below 50%, motor power shrinks, leading to slower travel and lifting speed.
• Lithium-ion batteries: Stable discharge voltage plateau. Voltage fluctuation is minimal within 20%~100% SOC. Power output remains nearly consistent throughout operation. No obvious performance gap between fully charged and low-battery conditions, delivering stable all-day working performance.

II. Advantages in Power Control & Handling Characteristics

1. Precise speed regulation with excellent inching performanceThe motor supports wide-range stepless speed regulation with high precision for low-speed inching. For narrow-aisle warehousing and high-precision stacking, the truck can move steadily at ultra-low speed for accurate pallet positioning. Internal combustion forklifts struggle to maintain stable low idle speed and tend to jerk.
2. Regenerative braking with dynamically optimized power distributionEquipped with regenerative braking: The motor operates as a generator to recharge the battery during accelerator release, deceleration and downhill travel. Three core benefits: ① Electric motor braking assists deceleration during downhill haulage, reducing brake pad wear; ② Energy recovered during downhill travel and frequent deceleration continuously supports power supply; ③ The ECU intelligently distributes power between traction motor and hydraulic lifting motor. Balanced power is available when driving and lifting simultaneously, avoiding insufficient travel power during lifting — a common issue for low-cost simple DC motor forklifts.
3. Intelligently limited power output for higher safetyThe vehicle control unit (VCU) enables graded power limitation: Automatically matched power output under no-load / half-load / full-load conditions; lifting speed restricted at high travel speeds; automatic speed reduction during turning. Unlike internal combustion engines that output constant power regardless of load, this function prevents rollover risks caused by overloading or high-speed lifting.

III. Power Stability under All-Weather & Variable Working Conditions

1. Better power retention at low temperatures than lead-acid forklifts, vastly superior to internal combustion forklifts

• Internal combustion engines face difficult cold startup, insufficient power and incomplete combustion during cold operation;
• Lead-acid batteries suffer sharp capacity and power loss at low temperatures;
• Lithium iron phosphate batteries (mainstream for forklifts) outperform lead-acid batteries under low temperatures. Models fitted with thermal-managed battery packs maintain controllable power attenuation in cold environments. Rated power can be delivered immediately after startup on cold mornings without warm-up time.

2. Consistent power performance under long-duration high-frequency cyclic operationsTypical warehousing duty cycles: Short shuttles, frequent lifting/lowering and repeated start-stop. Repeated start-stop sharply increases fuel consumption of internal combustion engines, accompanied by continuous engine heat buildup; prolonged heavy operation may trigger power derating due to overheating. Permanent magnet lithium motors generate less heat, resist thermal degradation under sustained high-frequency cycles, and maintain stable power for three-shift continuous operation.

IV. Energy Conversion Advantages in Power Efficiency

Comprehensive efficiency of internal combustion engines converting chemical energy to mechanical energy: 22%~32%Comprehensive efficiency of lithium-ion motors converting electric energy to mechanical energy: 75%~90%For identical operation requirements, less energy is consumed to achieve equivalent power output. With the same battery capacity, longer continuous high-power operation can be supported.

V. Objective Supplementary Limitations (Dialectical View of Performance Boundaries)

1. Upper limit for sustained ultra-high-power output: During long-duration extreme heavy-load climbing, lithium systems are constrained by battery discharge rate. High-power internal combustion forklifts still have advantages in short-time peak power output for extreme heavy-duty scenarios.
2. Limited maximum continuous high speed: Forklifts are designed primarily for low-speed warehousing applications. Motors are optimized for low-speed torque, not suitable for long-distance continuous high-speed travel.
3. Low-cost basic AC lithium forklifts with simple electronic control systems may encounter power competition between lifting and driving functions. Power allocation performance cannot match high-end complete permanent magnet synchronous powertrain systems.

Conclusion on Suitable Working Conditions

Lithium forklifts deliver optimal power performance for: Indoor warehousing, frequent start-stop cycles, repetitive stacking, ramp operations, multi-shift all-day work, and applications requiring smooth, precise handling. Core highlights summarized:Strong startup torque, consistent power without attenuation, smooth and controllable output, no warm-up required, regenerative braking, intelligent power limitation for safety, and high energy conversion efficiency.