3U Rack Telecoms Backup Batteries 48V 50Ah Lifepo4 Battery for Base
Station
About us
We Topband Battery is an expert manufacturing of LiFePO4 battery
since founded 2006.
-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 globally in the field of renewable
energy, from cell, BMS/PCM to battery pack assembling.
1. General Information
This specification defines the performance of 3U Rack Telecoms Backup Batteries 48V 50Ah LiFePO4 Battery 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(15S) |
| 2.3 | Nominal voltage | 48V(15S) |
| 2.4 | Internal resistance | ≤50mΩ @1kHz AC |
| 2.5 | Normal charge voltage | 54.75±0.3V(15S) |
| 2.6 | Float charge voltage(for Standby use) | 51.75±0.3V(15S) |
| 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(15S) |
| 2.11 | Dimension | Length 482±2 mm |
| height 133±2 mm |
| Depth 360±2 mm |
| 2.12 | Weight | Approx. 30kg |
| 2.13 | Working 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℃ (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 | ≤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℃ (-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 | 3.60±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 AC 220V, after rectification power module, output DC 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.
5.2 Installation DrawingCase dimension: 482(Width) * 360(Depth) * 133(height) mm；
Handle Depth:35mm; weight:Approx.28kg.
