Small Size 4s 7a 8a Li-ion 14.8v Pcm Battery Management System Ant Smart Active Balancer BMS For E-bike Lithium Solar Battery

Product Description

Small Size 4s 7a 8a Li-ion 14.8v Pcm Battery Management System Ant Smart Active Balancer BMS For E-bike Lithium Solar Battery
Product Description
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Key Specifications
Mode LWS-4S8A-451(4S)
PCM Size L50*W16*T5 mm
Battery Series 1S-4S Available
Working Current 8A Available
Application LED lights, Emergency lights, Digital Equipment, etc
Sample Available
Wiring & Connection Instructions
Wiring Diagram
  • 1
    First connect the B- of the BMS to the total negative pole of the battery pack.
  • 2
    The cable starts from the thin black one connecting B-, the second red wire connects the positive pole of the first string of batteries, and the next string is connected in turn to positive pole of the battery, B-, B1, B2.....B3; then insert the cable into the BMS.
    (The maximum number of strings is 4 strings, the example picture is 4 strings. Please weld the wires in order and avoid pseudo solder joints.)
  • 3
    Connect Charger C- / Load P- with BMS C- / P- (Use larger size wires).
  • 4
    Connect Positive Pole: Charger C+ / Load P+ with Battery Pack B+ (Use larger size wires).
PCM Specifications For 12.8V (4S) LiFePO4 Battery Packs
No. Parameter Class Test Item Criterion
1 Voltage Charging voltage DC: 14.4V CC/CV
2 Current Current consumption ≤50μA
3 Maximal continuous charging current 10A
4 Maximal plus Discharging current 10A
Protection Parameters
5 Over charge Protection Over charge detection voltage for single cell 3.85V±0.025V
6 Over charge detection delay time 0.5S—1.5S
7 Over charge release voltage for single cell 3.67V±0.05V
8 Over discharge protection Over discharge detection voltage for single cell 2.2V±0.08V
9 Over discharge detection delay time 50mS—150mS
10 Over discharge release voltage for single cell 2.65±0.10V
11 Over current protection Over current detection voltage 100±25mv
12 Charge Over-current detection current 15±3A
13 Discharge Over-current detection current 15±3A
14 Detection delay time 50mS—150mS
15 Release condition Cut load
16 Short protection Detection condition Exterior short circuit
17 Detection delay time 200-500us
18 Release condition Cut load
19 Signal line break Signal line break judgment (False soldering or falling off) Charge & discharge shutdown
20 Resistance Protection circuitry (MOSFET) ≤50mΩ
21 Temperature Operation Temperature Range -20°C ~ +65°C
22 Storage Temperature Range -20°C ~ +70°C

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Product Showcase & Details
Frequently Asked Questions
Q1 How many Ampere protection circuit boards should choose?
It depends on your load power such as electric motor power. Please contact technical support before buying.
Q2 What is the distinction between same port wiring and different port wiring?
The cathode of the charger and the load is different for different port wiring. The cathode of the charger and the load is the same for same port wiring, and the charging current is equal to the discharge current.
Q3 What is the distinction between balance and unbalance function?
The equilibrium function means that high voltage cells will be discharged with a resistor while waiting for low voltage cells, so that each cell voltage becomes consistent. This improves the overall performance of the battery pack.
Q4 Do you have a Minimum Order Requirement (MOQ)?
No, we do not have an MOQ. Different customers have different requirements; we can provide various capacities and sizes per your requirements. ODM and OEM orders are welcome.
Q5 How is quality guaranteed?
A pre-production sample is always provided before mass production, and a final inspection is always conducted before shipment.
Q6 What can you buy from this range of products?
Battery Pack BMS, Lifepo4/Lithium Ion PCM, Protection Circuit Boards, Printed Circuit Boards, and Lifepo4/Lithium Ion Battery Packs.

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