
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
Shenzhen Topband Battery Co., Ltd
Shenzhen Topband Co., Ltd. was registered in so-called “China Silicon Valley”, Shenzhen Hi-tech Industrial Park in 1996, and got listed in Shenzhen Stock Exchange ( the stock code as 002139) in 2007.
After years of rapid development, now Topband takes lithium battery as the core technology and has become one of the leading suppliers of lithium battery solutions in China, focusing on nano lithium iron phosphate/ LiFePO4 technology for EV, RV/ caravan, marine, motorcycle, golf cart / trolly, UPS, solar storage, medical, floor scrubber, industrial, commercial use, etc.
Topband has more than 5000 staffs, covers an area of 100,000 square meters. And large production plants are mainly located at Shenzhen and Huizhou
Our R&D team of over 300 professionals, in cooperation with Tsinghua Research Institute and Harbin Industrial University have laid a firm foundation of our leading technology.
We have got the certificates of ISO9001, ISO14001, OHSAS18001, TS16949 and UL, CE, CB, UN38.3, TUV, etc.
Topband is a Hi-tech enterprise. Since the company established, with innovation, we have committed ourselves to making people’s lives more comfortable and high-efficient. We and our companions are working hard at making technology progress to let people enjoy the changes of new technology.