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2S 3A Li-ion Lithium Battery 18650 Protection Charger Board BMS PCB Board

4.7376

$7.99 / $9.75

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Features:

- High-accuracy voltage detection circuit

- Terminal of the charger using high voltage device

- Built-in three-stage over-current detection circuit (over-current 1, over-current 2, or

load short circuit)

- MOS transistor can control the battery charge and discharge

- Low standby current consumption

Specification:

Over charge voltage:4.25-4.35V±0.05V

Over dishcarge voltage: 2.3-3.0V±0.05V

Max continuous current:3A

Max peak current:5A

Working temperature: -40 to +50 ℃

Storage Temperature: -40 to +80 ℃

Small current:less than 3uA

Resistance:Less than 45m

Short cut protection :Yes,charge can repair

Size: 36 x 6 x 1.0mm

Package Included:

1 x 18650 Charger Protection Board

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2S 3A Li-ion Lithium Battery 18650 Protection Charger Board BMS PCB Board

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A part of the review has been auto-translated.

Andyg VIP4
AU

13/11/2019

A simple little protection board for low current (3A or less draw) systems using 2 series lithium cells. The type / size of cell is not important but the chemistry, must be lithium.
The Negative ( -) end of the first cell is connected to the PCB terminal marked B-
The connections between the (+) positive end of the first cell and the (-) Negative end of the second cell is connected to the PCB terminal marked BM (battery middle?)
The (+) Positive end of the second cell is connected to the PCB terminal marked B+
The connection to the load / charge is made to the terminals marked P+ (7.5V nominal) and P- (GND Negative)

Operation is simple. If either of the 2 series cells exceeds the upper voltage limit or drops below the lower voltage limit, the load / charge connection disconnects. The load / charge connection reconnects when the voltages are normal again. This may be the basis of a simple charge limiting circuit and over discharge protection circuit.

The board is well made and works as it should.
I hope this clears up some of the questions raised.

A simple little protection board for low current (3A or less draw) systems using 2 series lithium cells. The type / size of cell is not important but the chemistry, must be lithium.
The Negative ( -) end of the first cell is connected to the PCB terminal marked B-
The connections between the (+) positive end of the first cell and the (-) Negative end of the second cell is connected to the PCB terminal marked BM (battery middle?)
The (+) Positive end of the second cell is connected to the PCB terminal marked B+
The connection to the load / charge is made to the terminals marked P+ (7.5V nominal) and P- (GND Negative)

Operation is simple. If either of the 2 series cells exceeds the upper voltage limit or drops below the lower voltage limit, the load / charge connection disconnects. The load / charge connection reconnects when the voltages are normal again. This may be the basis of a simple charge limiting circuit and over discharge protection circuit.

The board is well made and works as it should.
I hope this clears up some of the questions raised.

A simple little protection board for low current (3A or less draw) systems using 2 series lithium cells. The type / size of cell is not important but the chemistry, must be lithium.
The Negative ( -) end of the first cell is connected to the PCB terminal marked B-
The connections between the (+) positive end of the first cell and the (-) Negative end of the second cell is connected to the PCB terminal marked BM (battery middle?)
The (+) Positive end of the second cell is connected to the PCB terminal marked B+
The connection to the load / charge is made to the terminals marked P+ (7.5V nominal) and P- (GND Negative)

Operation is simple. If either of the 2 series cells exceeds the upper voltage limit or drops below the lower voltage limit, the load / charge connection disconnects. The load / charge connection reconnects when the voltages are normal again. This may be the basis of a simple charge limiting circuit and over discharge protection circuit.

The board is well made and works as it should.
I hope this clears up some of the questions raised.

8

Comments (4)

Show Original
Frantisek1 VIP4
SK
19/03/2019

Nabíjací a ochranný obvod pre 2ks spojené Li ion batérie 18650 2S 7,4 V. Balenie po 5 ks.

Nabíjací a ochranný obvod pre 2ks spojené Li ion batérie 18650 2S 7,4 V. Balenie po 5 ks.

Nabíjací a ochranný obvod pre 2ks spojené Li ion batérie 18650 2S 7,4 V. Balenie po 5 ks.
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A part of the QA has been auto-translated.

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Q:
What input volatges are supported? or do i need a seperate charging circuit despite the name?

What input volatges are supported? or do i need a seperate charging circuit despite the name?
What input volatges are supported? or do i need a seperate charging circuit despite the name?

A:

7.7-8.4V

7.7-8.4V

Answered by wujiahui on 09/07/2019Helpful (0)
0

Q:
Does "Over dishcarge voltage: 2.3-3.0V±0.05V" mean my battery can drop to 2.25V?

Does "Over dishcarge voltage: 2.3-3.0V±0.05V" mean my battery can drop to 2.25V?
Does "Over dishcarge voltage: 2.3-3.0V±0.05V" mean my battery can drop to 2.25V?

A:

The expression means is OK.

The expression means is OK.

Answered by Emily on 07/04/2020Helpful (0)
0

Q:
Do you solder on the front side of the board or the back side?

Do you solder on the front side of the board or the back side?
Do you solder on the front side of the board or the back side?

A:

On the back side.

On the back side.

Answered by wujiahui on 07/10/2019Helpful (0)
0

Q:
Can I connect 1 parallel strip of 4 batteries with this?

Can I connect 1 parallel strip of 4 batteries with this?
Can I connect 1 parallel strip of 4 batteries with this?

A:

No,you can connect 2 batteries.

No,you can connect 2 batteries.

Answered by wujiahui on 07/10/2019Helpful (0)
0

Q:
what wire do you need for this?

what wire do you need for this?
what wire do you need for this?

A:

This is a battery protection board that is connected to the battery for power output.

This is a battery protection board that is connected to the battery for power output.

Answered by wujiahui on 26/09/2019Helpful (0)
0

Q:
Can I connect 4 batteries with this?

Can I connect 4 batteries with this?
Can I connect 4 batteries with this?

A:

No.it just can connect 2 batteries with this.

No.it just can connect 2 batteries with this.

Answered by wujiahui on 26/09/2019Helpful (0)
0

Q:
Can it be used for one battery?

Can it be used for one battery?
Can it be used for one battery?

A:

This is suitable for connecting two lithium batteries in series. It is not recommended to use only one lithium battery.

This is suitable for connecting two lithium batteries in series. It is not recommended to use only one lithium battery.

Answered by wujiahui on 16/06/2019Helpful (0)
0

Q:
Can this circuit be specifically used only for 18650, or other li ion batteries will also do, like the one in cell phones, i have two of those from battery bank, there protection board is missing

Can this circuit be specifically used only for 18650, or other li ion batteries will also do, like the one in cell phones, i have two of those from battery bank, there protection board is missing
Can this circuit be specifically used only for 18650, or other li ion batteries will also do, like the one in cell phones, i have two of those from battery bank, there protection board is missing

A:

This protection board can also be done with other lithium-ion batteries. Not just 18650

This protection board can also be done with other lithium-ion batteries. Not just 18650

Answered by wujiahui on 31/05/2019Helpful (0)
0

Q:
please send sketch layout of battery connection.

please send sketch layout of battery connection.
please send sketch layout of battery connection.

A:

Sorry, the interface is marked on the board. We don't provide the wiring diagram. Maybe you can ask the friends who have already purchased it.

Sorry, the interface is marked on the board. We don't provide the wiring diagram. Maybe you can ask the friends who have already purchased it.

Answered by wujiahui on 23/05/2019Helpful (0)
0

Q:
b+ zo first battery plus. bm between both batteries. b- to the minus of the 2nd batt. both p to the supply and device

b+ zo first battery plus. bm between both batteries. b- to the minus of the 2nd batt. both p to the supply and device
b+ zo first battery plus. bm between both batteries. b- to the minus of the 2nd batt. both p to the supply and device

A:

There are labels on the board, B for input, and b for output.

There are labels on the board, B for input, and b for output.

Answered by wujiahui on 01/04/2019Helpful (0)
0

Q:
how to connect the battery, the input and output?

how to connect the battery, the input and output?
how to connect the battery, the input and output?

A:

The first comment on how to connect the battery.

The first comment on how to connect the battery.

Answered by wujiahui on 01/04/2019Helpful (0)
0

Q:
how to connect up the battery

how to connect up the battery
how to connect up the battery

A:

The back of the product has b+, b-, p+, p- signs, and the battery can work.

The back of the product has b+, b-, p+, p- signs, and the battery can work.

Answered by wujiahui on 21/11/2018Helpful (0)