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Smart Battery Systems (SBS) with SMBus for 4S Lithium / LiFePO4 battery with 10A limite (#4058)

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Mimimum 5qty, Lead time: 4-6 weeks

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 Protection Circuit Module Specifications For 4S Li-ion/LiFePO4 Battery Pack 
Model: SBS-S4A10-LI or SBS-S4A10-LFP
No. Test   item Criterion
No. Communication Interface SMBus
1 Capacity Default battery capacity (PCM) 10Ah
Max capacity (Battery pack) 32Ah
Min capacity (Battery pack) 1Ah
External capacity Indication LCD,LED,SOC
Gas gauge algorithm CEDV
2 Voltage Charging voltage

Li-ion: CC/CV: 16.8V (4.2V/1S);
LiFePO4: CC/CV: 14.4V (3.6V/1S);

Balance window (each series connection) 50mV±10%
Balance release voltage (each series connection) 20mV±10%
Balance detection delay time (each series connection)


3 Current Balance current for each series connection

Li-ion: 66mA±5mA;
LiFePO4: 56mA±5mA;

Normal operating-mode current (Gas Gauge IC), average 50μA
SLEEP operating-mode current (Gas Gauge IC), average 200μA
FULL SLEEP operating-mode current (Gas Gauge IC), average 1μA
Maximal continuous charging current 10A
Maximal continuous discharging current 10A
4 Over charge Protection
(each series connection)
Over charge detection voltage

Li-ion: 4.25±0.025V;
LiFePO4: 3.80±0.05V;

Over charge detection delay time 1S-2S
Over charge release voltage

Li-ion: 4.05±0.05V;
LiFePO4: 3.55±0.05V;

5 Over discharge protection
(each series connection)
Over discharge detection voltage Li-ion:2.50±0.07V;
LiFePO4: 2.0±0.05V;
Over discharge detection delay time 1S-2S
Over discharge release voltage

Li-ion: 3.0±0.1V;
LiFePO4: 2.7±0.05V;

6 Over current protection Over current detection voltage 0.2V±0.015V
Over current detection current 40-50A
Detection delay time   5ms-60ms
Release condition Cut load, Automatic recover
7 Short protection Detection condition Exterior short circuit
Detection delay time 200-800us
Release condition Cut load, Automatic recover
8 Resistance Protection  circuitry (MOSFET) B- TO P- ≤30mΩ
9 Temperature Charge temperature protection 60±5°C
Charge release temperature 50±5°C
Discharge temperature protection 65±5°C
Discharge release temperature 55±5°C
Operating Temperature Range -40 to +85°C
Storage Temperature Range -40 to +125°C
10 Weight    
11 Dimenstion LxWxT Main board: 90x30 mm ;
LED board: 53x13.5mm
12 Specification in PDF  
13 Interface
(not included)
MSP430F5529 USB 2.0 to SMBus Bridge Interface Evaluation Board Digikey: EV2400

 For other PCM/PCB, please check our PCM/PCB/BMS/CMB/UPS category


  • If you want to use this protection circuit board for a battery that is less than the rated drain, you must add additional protection device to protect the battery itself. Such as: proper rated polyswitch. 
  • You must be professional in Lithium battery pack to buy the protection circuit board. Misusing may cause battery damage or explode. We are not responsible for any damage caused by user.

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