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. is an expert manufacturing LiFePO4 battery, who founded in 1996 and listed in Shenzhen of China in 2007. There are over 600 R & D engineers and about 6,000 experienced workers, occupies 100,000 square meters Topband industrial park. We can provide One-Stop Solution of renewable energy, from cell, BMS/PCM to battery pack assembling.
Our culture is respect and agree with the difference culture and habit from all over the world, make customer success, developing with our customers, continue to self-improvement, commitment to excellence.
Our mission is creating valuable products to win the market for customer, our vision is to a respected intelligent Eco-friendly energy provider.
1. General Information
This specification defines the performance of Telecom Communication Batteries 48V 50Ah LFP Battery 3U Rack TB4850F -T110P manufactured by TOPBAND, describes the type, performance, technical characteristics, warning and caution of the battery pack.
2. Battery Specification(@ 25±5℃ (68℉~86℉)
| NO | Items | Characteristics | |
| 2.1 | Normal capacity | 50Ah | |
| 2.2 | Nominal energy | 2.4KWh | |
| 2.3 | Nominal voltage | 48V (15Serial-cell) | |
| 2.4 | Internal resistance | ≤40mΩ @1kHz AC | |
| 2.5 | Normal charge voltage | 54.75±0.3V | |
| 2.6 | Float charge voltage(for Standby use) | 51.75±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 | 37.5V | |
| 2.11 | Dimension | Length 482±2 mm | |
| height 133±2 mm | |||
| Depth 360±2 mm | |||
| 2.12 | Weight | Approx. 28kg (61.7Ib) | |
| 2.13 | Working temperature | Charge | 0～45℃ (32℉~113℉) |
| Discharge | -20～60℃ (-4℉~140℉) | ||
| 2.14 | Self-discharge rate | Residual capacity | ≤2%/Month; ≤10%/ year |
| Recover capacity | ≤1%/Month; ≤6%/ year | ||
| 2.15 | Storage environment | ≤1month | -20～35℃ (-4℉~95℉), 45～75%RH |
| ≥3month | -10～35℃ (14℉~95℉), 45～75%RH | ||
| Recommend environment | 15～30℃ (59℉~86℉), 45～75%RH | ||
3. Electrical Characteristics & Test Condition
Testing Conditions: Ambient Temperature: 25±5℃ (68℉~86℉); 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 | ≤40mΩ | @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 @DOD80% | ≥5000 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℃ (-4℉) | ≥70% |
Capacity @specified temperature Capacity @ 25℃ (77℉)
|
| 0℃ (32℉) | ≥80% | |||
| 25℃ (77℉) | ≥100% | |||
| 55℃ (131℉) | ≥95% | |||
| 3.6 | Capacity retention rate | remain capacity ≥96% | After normal charge, store the battery @25±5℃ (68℉~86℉) 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 | 3.55±0.03V |
| Over-charge protection for each cell | 3.75±0.03V | ||
| Over-charge release for each cell | 3.40±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 | 3.00±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 | Alarm@50±3℃;Protect@55±3℃; Release@50±3℃; |
| Charge under temperature protection | Alarm@0±3℃;Protect@0±3℃; Release@5±3℃ | ||
| Discharge over temperature protection | Alarm@60±3℃;Protect@65±3℃; Release@60±3℃; | ||
| Discharge under temperature protection | Alarm@-15±3℃;Protect@-20±3℃; Release@-15±3℃; |
5. User guide
5.1 Packing list
5.2 Operation Introduction
Reset RS485 RS232 Dial switch RUN LED alarm LED SOC LED
5.3 System operation
Wake up
System will go to Sleep mode without load or charger for 24h. The following operations can be used to
wake up:
a. Automatically wakeup when connecting a charger；
b. Press on the “reset” key for 3s；
System standby and sleep
Sleep mode:System will immediately go to Standby mode without load or charger, and RUN LED will
flash (1s ON, 1s OFF).
After 24h later,the system will automatically go to sleep mode. And then all LEDs in panel will turnoff.
System will go to sleep mode through press the reset key for 3s.
5.4 Installation Drawing
Case dimension: 482(Width) * 360(Depth) * 133(height) mm；
Handle Depth:35mm; weight:Approx.28kg.