Battery Maintenance Plan for Long-Term Idle Electric Scissor Lifts

Suitable for both lead-acid and lithium batteries, compatible with Yamei electric scissor lifts

I. Pre-Storage Shutdown Specifications (Critical Operations Before Storage)

1. Adjust battery charge to standard storage level

1. Lead-acid batteries: Fully charge the battery, then discharge it to 70%–80% SOC before storage. Long-term storage at full charge accelerates plate sulfation, while complete discharge during idle storage may render the battery permanently unusable.
2. Lithium batteries (mainly lithium iron phosphate): The optimal state for long-term storage is 50%–60% SOC. High-temperature storage at full charge accelerates cell degradation, and zero-charge storage will trigger low-voltage protection lockout.

2. Cleaning and power isolation

Clear dust, electrolyte stains and white oxide deposits on metal terminals from the battery surface, then wipe off all water stains. Apply anti-rust conductive grease to terminals.
If the unit will be out of service for more than 30 days: Disconnect the main negative battery cable to eliminate tiny static power consumption from the vehicle controller, display screen and emergency lights, preventing self-discharge-induced power loss.

3. Storage environment requirements

Optimal ambient temperature: 10℃～25℃. Avoid direct outdoor sunlight, subzero temperatures and damp basements.
Moisture and rain prevention: Elevate the unit at least 10 cm off the ground, keep away from ponding, oil stains, acid and alkaline dust; control relative humidity between 40% and 60%.
No heavy compression: Do not stack heavy objects on the platform or battery compartment to avoid squeezing the battery box.

II. Scheduled Charging Cycles by Battery Type

(1) Maintenance-free Lead-Acid Batteries (Standard for 6–12m Indoor Scissor Lifts)

Short-term idle (≤1 month): No need to disconnect cables. Check voltage monthly; recharge to full capacity immediately if voltage drops below 12.6V per battery pack.

Medium-to-long-term idle (1–6 months): Complete one full charge-discharge cycle every 30 days. Let the battery stand for 2 hours after full charging before disconnecting the negative cable for storage. Never store discharged batteries for more than 45 days.
Idle for over half a year: Charge monthly and perform light operation once every two months—lift and lower the platform 3–5 times to activate battery plates and reduce sulfation crystal buildup.
Risk warning: If lead-acid batteries sit discharged for more than 2 months, irreversible plate sulfation will occur, causing capacity loss of over 30%.

(2) Lithium Iron Phosphate Batteries (For Lithium-Powered Scissor Lifts)

Short-term idle (≤1 month): Maintain 50% charge; frequent recharging is unnecessary.
Medium-to-long-term idle (1–12 months): Top up charge to 50%–60% every 90 days; do not store at full capacity. The built-in BMS provides cell balancing, yet static power drain will slowly lower voltage.
Idle for over 1 year: Recharge every 3 months, and conduct 5 no-load lift-lower cycles on the unit every 6 months to balance cell voltage differences and prevent damage from over-discharging individual cells.

III. Daily Inspection Points During Idle Period

Voltage inspection: Measure voltage of single cells / full battery pack monthly. Charging is mandatory if single lead-acid battery falls below 12.3V or single lithium cell drops below 3.0V.
Visual inspection: Check for swelling, liquid leakage, abnormal heating and terminal corrosion. For lead-acid batteries, check for acid overflow from vent valves.
Temperature control inspection: Increase charging frequency by one extra cycle monthly under high summer temperatures. Do not charge batteries directly below 0℃ in winter; move indoors and warm up to above 5℃ before charging.
Prohibited practice: Leaving the charger continuously connected for floating charge during idle storage, which may lead to thermal runaway, water loss and battery swelling.

IV. Activation Procedures Before Reuse

For units stored in low-temperature environments: Move indoors and let stand for 4–6 hours to warm up to ambient temperature.
Slow charging first: Use original matched smart chargers; high-power fast charging to full capacity is forbidden. Adopt segmented charging with an initial charging duration of 8–12 hours.
No-load cycling: Complete 5–10 no-load lift-lower cycles after full charging, plus 2 full charge-discharge cycles to restore battery activity.
Performance test: Lift the platform to maximum height with no load and hold for 10 minutes to monitor voltage drop. Excessive voltage drop indicates severe battery degradation and requires replacement.

V. Forbidden Operations (Severely Shortening Battery Service Life)

• Storing fully charged batteries under direct high-temperature sunlight or storing discharged batteries in subzero conditions
• Failing to disconnect the main power supply long-term, causing continuous static power drain and discharge
• Skipping recharging for over 2 months and letting batteries self-discharge down to low-voltage protection
• Using inferior non-original chargers that cause overcharging and unstable current, damaging battery plates / cells
• Leaving water on battery surfaces and corroded terminals uncleaned, leading to partial short circuits and accelerated self-discharge