RELiON RB20 - 12V 20Ah Lithium Deep Cycle Battery

RELiON RB20 — 12V 20Ah Lithium Deep Cycle Battery

The RELiON RB20 is a 12V-class lithium iron phosphate (LiFePO4) deep cycle battery with a nominal voltage of 12.8V, 20Ah capacity and 256Wh of energy. Its compact ABS case, M6 terminals and 5.6 lb weight make it a compact power source for compatible deep cycle equipment.

Key Features

• LiFePO4 chemistry with cylindrical cells.
• 20A maximum continuous discharge and 40A peak discharge for 7.5 seconds ±2.5 seconds.
• Battery management system with voltage, current, short-circuit and high-temperature protection.
• IP66 enclosure protection and ABS case.
• 4,000+ cycles and 5-year warranty, as stated in the existing product specifications.
• Up to three modules in series.

Electrical Specifications

• Model: RB20
• Nominal voltage: 12.8V
• Nominal capacity: 20Ah at the 20-hour rate
• Energy: 256Wh
• Capacity at 25A: 48 minutes
• Resistance: ≤60 mΩ at 50% state of charge
• Efficiency: 99%
• Self-discharge: less than 3% per month
• Maximum modules in series: 3

Dimensions and Construction

• Dimensions (L × W × H): 181 × 76 × 169 mm (7.1 × 3.0 × 6.7 in)
• Weight: 2.55 kg (5.6 lb)
• Terminal type: M6 × 1.0
• Terminal torque: 4–5 N·m (35–44 in-lb)
• Case material: ABS
• Enclosure protection: IP66
• Cell type and chemistry: cylindrical LiFePO4

Discharge Specifications

• Maximum continuous discharge current: 20A
• Peak discharge current: 40A (7.5 seconds ±2.5 seconds)
• BMS discharge current cut-off: 70A ±10A (20 ±5 ms)
• Recommended low-voltage disconnect: 11V
• BMS discharge voltage cut-off: 8V (2.0 ±0.08V per cell), 140 ±60 ms
• Reconnect voltage: 10V (2.5 ±0.10V per cell)
• Short-circuit protection: 200–500 µs

Charging Specifications

• Recommended charge current: 1–10A
• Maximum charge current: 20A
• Recommended charge voltage: 14.2–14.6V
• BMS charge voltage cut-off: 15.2V (3.8 ±0.025V per cell), 1.1 ±0.4 seconds
• Reconnect voltage: 14.4V (3.6 ±0.025V per cell)
• Balancing voltage: 14.4V (3.6 ±0.025V per cell)
• Charging from -10°C to 0°C: ≤0.1C
• Charging from -20°C to -10°C: ≤0.05C

Use charging equipment compatible with the battery's LiFePO4 voltage and current requirements. Observe the reduced charging-current limits below 0°C.

Temperature Specifications

• Discharge temperature: -20°C to 60°C (-4°F to 140°F)
• Charge temperature: -20°C to 45°C (-4°F to 113°F), subject to reduced current limits below 0°C
• Storage temperature: -5°C to 35°C (23°F to 95°F)
• BMS high-temperature cut-off: 70°C (158°F)
• Reconnect temperature: 50°C (122°F)

Listed Certifications and Shipping Classification

The existing product data sheet lists CE and UN38.3 for the battery, UL1642 and IEC62133 for the cells, and shipping classification UN 3480, Class 9.

Available from Thunder Battery.