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Shenzhen Topband New Energy Co.,Ltd
A professional manufacturer of LiFePO4 battery / lithium iron phosphate , engaged in design , research , manufacture , sales and after sales for LiFePO4 battery( cell & pack & BMS/PCM) .
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48V 75AH Home Battery Storage Systems over 1500 cycles @ 100% DOD

48V 75AH Home Battery Storage Systems over 1500 cycles @ 100% DOD

Brand Name : Topband
Model Number : TB4875F-S113A
Certification : MSDS
Place of Origin : China
MOQ : 50pcs
Price : Negotiable
Payment Terms : L/C, T/T
Supply Ability : 450Mwh/year
Delivery Time : 2~4weeks for samples; 4~6weeks for mass production
Packaging Details : standard export carton
Nominal Voltage : 48V
Typical Capacity : 75Ah
Nominal Charge Voltage : 58.4V
Discharge Cut-off Voltage : 40V
Max Charge Current : 60A
Max Continuous Discharge Current : 60A
Peak Discharge Current : 350A
Work Temperature : -20℃ - 60℃ ( -4℉ - 140℉ )
Cycles Life@ 100% DOD : ≥2000
Weight : 37.7kg
Dimension : 520*269*221mm
Material : Nano LiFePO4
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48V 75AH Home Battery Storage Systems over 1500 cycles @ 100% DOD

1. General Information

This specification defines the performance of rechargeable LiFePO4 battery pack TB4875F-S113A manufactured by SHENZHEN TOPBAND NEW ENERGY CO.,LTD, describes the type, performance, technical characteristics, warning and caution of the battery pack.

2. Specification

Normal specification
1Nominal Voltage51.2V
2Normal Capacity75Ah
3Internal Resistance≤40mΩ
Standard Charge
4Battery operation temperature range @charging0~45℃
5Normal charge voltage58.4±0.4V
6Recommended float charge voltage(for Standby use)55.6±0.4V
7Allowed MAX charge current60A@Battery initial Temp 25±5℃
8Recommended charge current≤40A
Standard discharge
9Battery operation temperature range @discharging-20~60℃
10Output Voltage Range36.8~58.4V
11Allowed discharge current100A withstand 30min @Battery initial Temp 25±5℃
12Peak discharge current350A withstand 3s
13Discharge Cut-off voltage36.8V
Mechanical Characteristics
14DimensionLength 520±3mm
Width 269±3mm
Height 221±3mm
15WeightApprox. 37.7Kg
16Storage Temperature & Humidity RangeShort: within one month-20~35℃, 45~75%RH
Long term: above one month-10~30℃, 45~75%RH
17Self-discharge rateResidual capacity≤3% per month; ≤15% per year
Reversible capacity≤1.5%per month; ≤8% per year

3. Electrical Characteristics & Test Condition

Testing Conditions: Ambient Temperature: 25±5℃; Huminity:45%~75%.

1Internal Impedance≤40mΩTest the internal resistance of 50% SOC battery pack with 1 kHz AC internal resistance test instrument.
2Capacity≥73.5AhRest 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.
3Short circuit protection/Not allowed.
4MAX charge Current60ACharging with this current for more than 0.5h and the added temperature of battery pack less than 20℃.
5MAX discharge Current100ADischarging with this current for more than 10min and the added temperature of battery pack less than 35℃.

Cycle life (DOD%100)

≥2000cycleDischarge 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.

Discharge Temperature


-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.
8Charge Retention abilityremain 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 itemContentCriterion
Over chargeOver-charge protection for each cell3.90±0.03V
Over-charge release for each cell3.60±0.05V
Over-charge release methodUnder the release voltage
Over dischargeOver-discharge protection for each cell2.30±0.05V
Over-discharge release for each cell2.80±0.05V
Over-discharge release methodAbove the release value
Over currentDischarge over current protection400±50A
Protection delay time50~200ms
Over current release methodRelease after 8s.

Over & Lower


Battery over temperatureProtection @65±5℃
Release @55±5℃
Battery Lower temperature @chargingProtection @-5±5℃
Release @5±5℃

5. Dimensional Drawing

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