UPS power battery maintenance plan

Here is the English version of the UPS Battery Maintenance Plan, covering daily upkeep, periodic inspections, and key precautions to ensure stable performance and extend battery lifespan:

I. Daily Maintenance

1. Environmental Control

• Temperature: Maintain battery room/cabinet temperature at 20-25°C (for lead-acid batteries) or 25-30°C (for lithium batteries). Avoid extremes (>35°C or <0°C).

• Humidity: Keep relative humidity between 40%-60% to prevent condensation or excessive dryness.

• Ventilation: Ensure proper airflow to avoid accumulation of corrosive gases.

2. Cleaning and Visual Inspection

• Monthly inspection of battery casings, terminals, and cables. Remove dust and corrosion (use a dry cloth or neutral cleaner).

• Check for leaks, swelling, cracks, or terminal oxidation (replace immediately if abnormalities are found).

3. Charge/Discharge Monitoring

• Ensure UPS remains in float charge mode (lead-acid batteries typically require 2.25-2.30V/cell).

• Avoid prolonged overcharging or undercharging (lithium batteries must follow manufacturer specifications strictly).

II. Periodic In-Depth Inspections

1. Monthly Checks

• Measure and record individual cell voltages (deviation should be <±0.2V for lead-acid batteries).

• Verify torque of connection screws (prevent loosening; refer to manufacturer standards).

• Test UPS self-diagnostic functions.

2. Quarterly Maintenance

• Internal Resistance Test: Investigate if resistance increases abnormally (e.g., >25% above factory value).

• Load Test: Simulate power outage to validate battery performance (recommended: 30-50% load for 10-15 minutes).

• Equalization Charge: For lead-acid batteries, apply 2.35-2.40V/cell for 8-12 hours.

3. Annual Maintenance

• Capacity Test: Discharge to 80% of rated capacity (e.g., 30% load until cutoff voltage). Replace if capacity falls below 80%.

• Comprehensive Cleaning and Tightening: Clean battery racks/cabinets and retighten all electrical connections.

• Replace Aging Batteries: Replace individual cells with significant performance degradation (avoid "bucket effect").

III. Key Precautions

1. Safety Measures

• Wear insulated gloves and goggles to prevent short circuits or electrolyte contact.

• No smoking or open flames near batteries (hydrogen gas is flammable).

2. Battery Replacement Rules

• Use identical brand, model, and batch for battery groups (avoid mixing).

• Typical lifespan: 3-5 years for lead-acid, 5-10 years for lithium (varies by cycle count).

3. Data Recording & Analysis

• Maintain logs for voltage, internal resistance, capacity, etc., to track degradation trends.

4. Special Scenarios

• Long-Term Storage: Recharge lead-acid batteries every 3 months.

• High-Temperature Environments: Shorten maintenance intervals (e.g., monthly resistance checks).

IV. Recommended Tools

• Testing Equipment: Battery internal resistance tester, infrared thermometer, multimeter.

• Maintenance Supplies: Terminal anti-corrosion gel (e.g., Vaseline), insulated tools, anti-static brush.

V. Manufacturer Support

• Schedule regular UPS manufacturer calibrations (e.g., charge parameter adjustments).

• For complex issues (e.g., BMS alarms), prioritize professional technician intervention.

By implementing systematic maintenance, UPS battery failure rates can be significantly reduced, ensuring uninterrupted power supply for critical equipment.