Eco - Friendly 48V 50AH Telecom Battery Deep Cycle TB4850F-T110C
- long life & deep cycle( over 2000cycles @ 100%DOD)
- with built-in PCM/BMS protection
- super quick charge/discharge performance
- safe pressure valve design ( no explosion, no fire)
- high energy density
- low self-discharge( <3% per month,<15% per year)
- 1/3 weight & 1/2 volume of lead acid battery
- eco-friendly
- high consistency
- no memory effect
- easily replace lead acid battery
1. General Information
This specification defines the performance of rechargeable LiFePO4
battery pack TB4850F-T110C manufactured by Shenzhen Topband Battery Co., Ltd, describes the
type, performance, technical characteristics, warning and caution
of the battery pack.
2. Specification
| NO | Items | Description | | Normal Specification | | 1 | Nominal Voltage | 51.2V | | 2 | Normal Capacity | 50Ah | | 3 | Internal Resistance | ≤60mΩ | | Standard Charge | | 4 | Battery operation temperature range @charging | 0~45℃ | | 5 | Normal charge voltage | 58.4±0.2V | | 6 | Recommended float charge voltage(for Standby use) | 55.2±0.2V | | 7 | Recommended charge current | ≤25A @Battery initial Temp 25±5℃ | | 8 | Allowed MAX charge current | 50A @Battery initial Temp 25±5℃ | | Standard Discharge | | 9 | Battery operation temperature range @discharging | -20~60℃ | | 10 | Output Voltage Range | 40.0~58.4V | | 11 | Allowed discharge current | 50A withstand 30min @Battery initial Temp 25±5℃ | | 12 | Pulse discharge current | 100A withstand 3s | | 13 | Discharge Cut-off voltage | 32.0V | | Mechanical Characteristics | | 14 | Dimension | Length 425±3mm | | Width 482±3mm | | Height 133.2±3mm | | 15 | Weight | Approx. 30.5±0.2 Kg | | Storage | | 16 | Storage Temperature & Humidity Range | Short: within one month | -20~35℃, 45~75%RH | | Long term: above one month | -10~30℃, 45~75%RH | | 17 | Self-discharge rate | Residual capacity | ≤3% per month; ≤15% per year | | Reversible capacity | ≤1.5%per month; ≤8% per year |
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3. Electrical Characteristics & Test Condition
Testing Conditions: Ambient Temperature: 25±5℃; Huminity:45%~75%.
| NO | Items | Criterion | Condition | | 1 | Internal Impedance | ≤60mΩ | Test the internal resistance of 50% SOC battery pack with 1 kHz AC
internal resistance test instrument. | | 2 | Capacity | ≥50Ah | Rest for 1 hour after fully charged, then discharge with 0.33C
current until the battery reaches the discharge cutoff voltage.
Repeat above process for three times, if the discharge time is not
less than 180 minutes, you can stop and define the Discharging
current*time value (Ah) as battery capacity. | | 3 | Short circuit protection | / | Not allowed. | | 4 | MAX charge Current | 50A | Charging with this current for more than 0.5h and the added
temperature of battery pack less than 20℃. | | 5 | MAX discharge Current | 50A | Discharging with this current for more than 0.5h and the added
temperature of battery pack less than 35℃. | | 6 | Cycle life (DOD%100) | ≥1200cycle | Discharge with the current of 0.5C until it can’t discharge, and
then rest it for 1h. Charge the battery following
CC(0.33C)/CV(14.6V) mode to full capacity, and then rest it for 1h.
Repeat above process until full charged capacity is no more than
80% of normal value. Accumulated times is defined as cycle life. | | 7 | Discharge Temperature Characteristics | -20℃ | ≥70% | At 25±5℃ discharge the battery with the current of 0.33C to the
cut-off voltage. Store the battery at various temperatures for 2h
and discharge the battery with 0.33C to the cut-off voltage. Record
the ratio between discharging & charging capacity. | | 0℃ | ≥80% | | 25℃ | 100% | | 55℃ | ≥95% | | 8 | Charge Retention ability | remain capacity≥90% | Charge the battery to full capacity and store it for 28days, and
then discharge it with 0.33C to the cut-off voltage. |
|
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.
| Test item | Content | Criterion |
| Over charge | Over-charge protection for each cell | 3.90±0.03V |
| Over-charge release for each cell | 3.60±0.05V |
| Over-charge release method | Under the release voltage |
| Over discharge | Over-discharge protection for each cell | 2.30±0.05V |
| Over-discharge release for each cell | 2.80±0.05V |
| Over-discharge release method | Charging |
| Over current | Discharge over current protection | 400±50A |
| Protection delay time | 50~200ms |
| Over current release method | Release after 30s. |
Over & Lower Temperature | Battery charge/discharge over temperature | Protection @65±5℃ |
| Release @55±5℃ |
| Battery charge lower temperature | Protection @-5±5℃ |
| Release @5±0℃ |
5. Dimensional Drawing
