Shenzhen Topband Battery Co., Ltd
A professional manufacturer of LiFePO4 battery / lithium iron phosphate, dedicated to designing, researching, manufacturing, and exporting LiFePO4 batteries( cell & pack & energy storage system) to
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Shenzhen Topband Battery Co., Ltd, a company professional to do LiFePO4 battery, which is founded in 1996 and listed in Shenzhen in 2007.There are over 300 R&D engineers and about 3,000 employees in the 70,000 square meters Topband industrial park.We can provide One-Stop Solution of new energy, from cell, BMS/PCM to battery pack assembling.
1. General Information
This specification defines the performance of rechargeable LiFePO4 battery pack TB4850F -T110D manufactured by TOPBAND NEW ENERGY CO.,LTD, describes the type, performance, technical characteristics, warning and caution of the battery pack.
2. Battery Specification(@ 25±5℃)
| NO | Items | Characteristics | |
| 2.1 | Normal capacity | 50Ah | |
| 2.2 | Nominal energy | 2.56KWh | |
| 2.3 | Nominal voltage | 51.2V (LFP-16S) | |
| 2.4 | Internal resistance | ≤50mΩ @1kHz AC | |
| 2.5 | Normal charge voltage | 58.4±0.3V | |
| 2.6 | Float charge voltage(for Standby use) | 55.2±0.3V | |
| 2.7 | Allowed MAX charge current | 50A | |
| 2.8 | Recommended charge current | ≤25A | |
| 2.9 | Allowed MAX discharge current | 50A | |
| 2.10 | End of discharge voltage | 40.0V | |
| 2.11 | Dimension | Length 482±2 mm | |
| height 133±2 mm | |||
| Depth 360±2 mm | |||
| 2.12 | Weight | Approx. 30.0kg | |
| 2.13 | Operation temperature | Charge | 0～45℃ |
| Discharge | -20～60℃ | ||
| 2.14 | Self-discharge rate | Residual capacity | ≤2%/Month; ≤10%/ year |
| Recover capacity | ≤1%/Month; ≤6%/ year | ||
| 2.15 | Storage environment | ≤1month | -20～+35℃,45～75%RH |
| ≥3month | -10～+35℃,45～75%RH | ||
| Recommend environment | 15～30℃,45～75%RH | ||
3. Electrical Characteristics & Test Condition
Testing Conditions: Ambient Temperature: 25±5℃; Huminity:45%~75%.
Normal charge:Charge battery under CC(0.33C)/CV(58.4V) mode until over charge protection or the charge current reduce to 0.05C, and then rest for 1h.
| NO | Items | Criterion | Condition | |
| 3.1 | Normal Capacity | 50Ah | After Normal charge, discharge @0.33C current to the end of discharge voltage. | |
| 3.2 | Internal Impedance | ≤50mΩ | @50% SOC @1kHz AC internal resistance test instrument. | |
| 3.3 | Short circuit protection | Auto cutoff load when short circuit | Connect the positive and negative of this battery pack through a lead with 0.1Ω resistance. | |
| 3.4 | Cycle life @DOD100% | ≥2000 cycles | After Normal charge,discharge @0.33C current to the end of discharge voltage. Repeat above process until discharge capacity reduce to 80% of initial value. | |
| 3.5 | @0.33C Discharge temperature characteristic@0.33C | -20℃ | ≥70% |
Capacity @specified temperature Capacity @ 25℃
|
| -0℃ | ≥80% | |||
| 25℃ | ≥100% | |||
| 55℃ | ≥95% | |||
| 3.6 | Capacity retention rate | remain capacity ≥96% | After normal charge, store the battery @25±5℃ for 28days, then discharge capacity @0.33C,the retention capacity accord with criterion. | |
4. Circuit Protection
The batteries are supplied with a LiFePO4 Battery Management System (BMS)that can monitor and optimized each single prismatic cell during charge & discharge, to protect the battery pack overcharge, over discharge, short circuit. Overall, the BMS helps to ensure safe and accurate running.
| No | Item | Content | Criterion |
| 4.1 | Over charge | Over-charge warning for each cell | 3.60±0.03V |
| Over-charge protection for each cell | 3.70±0.03V | ||
| Over-charge release for each cell | 3.38±0.05V | ||
| Over-charge release method | Under the release voltage | ||
| 4.2 | Over discharge | Over-discharge warning for each cell | 2.80±0.05V |
| Over-discharge protection each cell | 2.50±0.05V | ||
| Over-discharge release for each cell | 2.90±0.10V | ||
| Over-discharge release method | Charging | ||
| 4.3 | Over current | Charge over current warning | 55±3A |
| Charge over current protection | 60A±3A | ||
| Charge over current release | Discharge or auto release after 1min | ||
| Discharge over current warning | 55±3A | ||
| Discharge over current protection | 60A±3A | ||
| Discharge over current release | Charge or auto release after 1min | ||
| Short circuit protection | Available | ||
| 4.4 | Temperature | Charge over temperature protection | Protect@55±3℃; Release@50±3℃; |
| Charge under temperature protection | Protect@0±3℃; Release@5±3℃ | ||
| Discharge over temperature protection | Protect@65±3℃; Release@60±3℃; | ||
| Discharge under temperature protection | Protect@-20±3℃; Release@-15±3℃; |
5. User guide
5.1 TB48XXF-T110X Operation principle and Wiring hint
Input 220Vac, after rectification power module, output 48V. When the power grid normal, the battery will supply power according to system requirement, and to be charged at same time; when power off, the battery will supply energy, to make sure the DC power system working normally, to realize uninterruptible power supply. The power supply has second disconnection function, when the battery voltage is low, the battery output would be cut off to protect battery life.
5.2 Operation panel direction
Reset RS485 RS232 Dial switch RUN LED alarm LED SOC LED
5.3 sleep mode
The system would go into low-consumption mode in any of the following conditions:
Before sleep mode, please make sure there is no input voltage, otherwise it can no go to sleep mode.
5.4 wake up
When the system is in low-consumption mode, the system would exit low-consumption mode and go into normal running mode in any of the following conditions:
Remark: single model or the whole system goes to low-consumption mode after over discharge protection, it would be wake-up every 4hs, to open discharge MOS. If it can be charged, it would exit sleep mode and start normal charge; if it fails to be charged after 10times of wake-up automatically, there would be no automatic wake-up.
5.5 Installation drawing
Case dimension: 482(Width) * 360(Depth) * 133(height) mm；
Handle Depth:35mm; weight:Approx.30kg.