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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.
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
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Exporter
Year Established:
1996
Total Annual:
240million-250million
Employee Number:
5000~5500
Ecer Certification：
Active Member
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 ... 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 ...
