Introduction
The B31 battery box uses LFP as the cathode
material, with excellent safety characteristics. The battery pack is liquid-cooled, has a long
cycle life, good temperature performance, high energy density, low cost, and is
environmentally friendly.
Structure
◆ The battery box consists of 40 C115F individual cells connected in series using a CTP scheme;
◆ The top cover is made using low-density, high-strength, fire-resistant continuous glass fiber fabric prepreg compression molding process (PCM);
◆ The battery pack has a high energy density.
Features
◆ Single-cell voltage monitoring
◆ Single-cell temperature monitoring
◆ Heating and cooling
Certificates
◆ GB38031/GB3802
◆ R100
◆ UN38.3
| Category | Parameter | Value |
| Basic Parameters | Nominal Voltage | 128.0V |
| Rated Capacity | 245.5Ah (2.0~3.7V) | |
| Rated Energy | 34.42KWh | |
| Pack GED | 166.2wh/kg | |
| VCtP | 59.10% | |
| Cell GED | 181wh/kg | |
| IP Rating | IP68 | |
| Structural Dimensions | Height | 240 ±3mm |
| Width | 627 ±5mm | |
| Length | 915 ±5 mm | |
| Weight | 189 ±5.5kg | |
| Electrical Parameters | Charging Method | CC/CP |
| Charging Current | 49A (Standard) | |
| Maximum Charging Current (at 25°C) | 245A | |
| Charging Cut-off Voltage | 3.7V per cell | |
| Discharge Method | CC/CP | |
| Discharge Cut-off Voltage | 2.0V per cell | |
| Discharge Current | 49A (Standard) | |
| Maximum Discharge Current (at 25°C) | 245A | |
| Pulse Charge/Discharge Current (at 25°C for 30S) | 400A | |
| Charge/Discharge Efficiency | > 95% (0.2C@RT) | |
| Battery Pack Impedance | ≤32mΩ | |
| Single Cell Impedance | < 0.8mΩ | |
| Insulation Resistance | > 5000Ω/v | |
| Y Capacitance | <35nF | |
| Operating Conditions | Charging Environment Temperature | -20 ~ +50°C |
| Discharge Environment Temperature | -30 ~ +55°C | |
| Storage Environment Temperature | Short-term Storage: 28 ~ +40°C (< 1 month, SOC: 20% to 50%) | |
| Long-term Storage: -20 ~ +28°C (< 6 months, SOC: 20% to 50%) | ||
| Storage Humidity | 5% ~ 95% | |
| Shipping State | 40% to 60% SOC (adjustable according to customer requirements) |
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