Active Member
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[China]
Address: Topband Industry Park,Tangtou Town,Bao'an District,Sheznzhen,China
Contact name:Jerry Yang
Shenzhen Topband Battery Co., Ltd |
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Topband 48v 20ah rechargeable lifepo4 battery pack for electric two-wheeler
1. Feature:
2. Specification
NO |
Items |
Characteristics | |
| 2.1 | Normal capacity | 20Ah | |
| Minimum capacity | 19Ah | ||
| 2.2 | Nominal energy | 1.024kWh | |
| 2.3 | Nominal voltage | 51.2V | |
| 2.4 | Internal resistance | ≤60mΩ @1kHz AC | |
| 2.5 | Normal charge voltage | 57.6±0.5V | |
| 2.6 | Float charge voltage(for Standby use) | 54.4±0.8V | |
| 2.7 | Allowed MAX charge current | 20A | |
| 2.8 | Recommended charge current | 4A | |
| 2.9 | Allowed MAX discharge current | 30A | |
| 2.10 | End of discharge voltage | 50V~55V | |
| 2.11 | Pulse discharge current | Withstand the 50A/0.5s | |
| 2.12 | Dimension | Length 325 ±2 mm | |
| Width 185 ±2 mm | |||
| Height 180 ±2 mm | |||
| 2.13 | Weight (No accessories) | About: 10Kg | |
| 2.14 |
Operation temperature | Charge | 0～43℃ |
| Discharge | -20～60℃ | ||
| 2.15 | Self-discharge rate | ≤3%/Month; ≤15%/ year | |
| 2.16 |
Storage environment | ≤1month | -20～+60℃,5～75%RH |
| ≥3month | -10～+43℃,5～75%RH | ||
Recommend environment | 15～33℃,5～75%RH | ||
4. Circuit Protection
No |
Item |
Content |
Criterion |
| 4.1 |
Over charge |
Over-charge protection for each cell | 3.65±0.03V |
Over-charge release for each cell | 3.34±0.03V | ||
Over-charge release method |
Under the release voltage | ||
| 4.2 |
Over discharge |
Over-discharge protection each cell | 2.50±0.03V |
Over-discharge release for each cell | 2.90±0.03V | ||
Over-discharge release method |
Charging | ||
| 4.3 |
Over current |
Charge over current protection | 34A～36A,delay time 0.5~1.5s |
Charge over current release |
Discharge or auto release after 1min | ||
Discharge over current protection | 34A～36A,delay time 0.5~1.5s | ||
Discharge over current release |
Charge or auto release after 1min | ||
Short circuit protection | |||
| 4.4 |
Temperature |
Charge over temperature protection |
Protect@65±3℃; Release@50±3℃; |
Charge under temperature protection |
Protect@-5±3℃; Release@0±3℃ | ||
Discharge over temperature protection |
Protect@65±3℃; Release@50±3℃; | ||
Discharge under temperature protection |
Protect@-20±3℃; Release@-15±3℃ | ||
| 4.5 | MOS |
MOSFET over temperature protection |
Protect@100±10℃; Release@85±10℃; |
5.Transport & Store
The battery need to be charged every 6 months if out of use
No fall down, no pile up over 6 layers, and keep face up.
6. Application
