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3 series of 12.6V 20A lithium battery protection board (with recovery function-AUTO Recovery)

Scope of application: Lithium batteries with nominal voltages of 3.6V and 3.7V (including 18650, 26650, polymer lithium batteries)

Product size: 59*20*3.4mm

Product weight: 4.3g

Charging voltage: 12.6V-13.0V

Continuous discharge current (upper limit): 20A (If the heat dissipation environment is not good, please reduce the load current to use)

Continuous charging current (upper limit): 10A

Standard version: suitable for electric drills with starting current below 40A and power below 65W.

Note 1: Successful start of the electric drill requires 3 power batteries of 15C-20C, or 6 power batteries of 10C-15C (ordinary 18650 cannot start the electric drill!! !); if it happens to be the battery is too small or the power of the electric drill is too large If you cannot start, please contact the owner to tell you the solution.

Note 2: Wiring 0V, 4.2V, 8.4V, 12.6V strictly according to the diagram, do not intentionally short-circuit.

Note 3: For loads with brushed motors, a capacitor (10uF-1000uF) must be connected in parallel to the positive and negative terminals of the motor to prevent the reverse peak voltage generated by the motor from interfering with the protection board or puncturing the MOS tube.

Note 4: When connecting 3 sets of batteries in series, please ensure that the voltage of each set of batteries is the same. If they are not the same, please charge each set of batteries separately and use them in series. . .

During the discharge test, the battery with the faster voltage drop is a bad battery.

Explain for some customers with poor electronic foundation: Never mix good batteries and bad batteries together! The closer the capacity/internal resistance of the 3 sets of batteries, the better! (2 good batteries + 1 poor battery use effect = 3 poor battery usage effects).

3 Series 18650 battery 25A

11.1V (Li-ion 18650 or li-ion battery rated voltage)

12.6V (Li-ion battery full charge voltage)

10.8V ( Lipo battery pack rated voltage)

The lithium battery protection board is not included the welding tabs.

BMS activate method : Use 12.6V Li-ion charger to charge it.

NOTE:

1) This board is not suit high power electronic tools, if use for screwdrier and drill,electric bike series make,fishing machine and 1W LED, please don't buy this.

2)Above 3A device,means the battry discharge rate is more than 3C.

1C rated battery, 2000mah equals 2ah*1=2A max working current.

3C rated battery means 2ahx3=6A Max working current.

Balancer is just a Auxiliary function, The balancing means when the battery charging,each series battery need with the same voltage.when ONE cell voltage get 4.2V ,the other cells not, the first cell voltage will discharge to wait the other cells rising to the same level.

Note:

battery internal resistance differences within 5 milliohm, voltage within 0.03 V voltage, capacity vary within 50 ma

Features:

1) high-accuracy voltage detection circuit;

2) terminal of the charger using high voltage device;

3) Built-in three-stage over-current detection circuit (over-current 1, over-current 2, or load short circuit);

4) MOS transistor can control the battery charge and discharge;

5) low standby current consumption.

Brief Parameter:

Over Charge voltage:4.25-4.35v±0.05v

Over Discharge voltage: 2.3-3.0v±0.05v

Max Working current:25A

Max peak current:35-40A

Working temperature:-40---+50

Storage Temperature:-40-- +80

Small current:50uA

Life cycle:more then 30000 hours

Resistance:Less than 100mΩ

Short Cut:Protectable,Charge can repair

Size:56*45*4.0mm

Application:

Vacuum cleaner,massager battery pack,LED backup power supply,12V li-ion electronics, solar power led, ect

Parameter:

3S BMS Cnnection instruction:

pack reference

Introduction

Product Name: 3 string 12.6V 40A lithium battery protection board

Charging voltage: DC 12.6V~13.6V

Continuous discharge current: 40A maximum (if the heat dissipation environment is not good, please reduce the load current)

Continuous charging current: up to 20A

Balance VersionProduct size: 41*61*4mm

Enhance VersionProduct size: 41*55*4mm

Applicable choice: applicable to the nominal voltage of 3.7V, fully charged 4.2V lithium battery

(including 18650, 26650, polymer lithium battery), can be drilled below 170W

Note 1: Successfully start the drill requires 3 10C-20C power batteries, or 6 5C-10C power batteries (recommended power battery models: sony vtc4, vtc4A, vtc5A, vtc6) OV and 12.6V cable, use Copper wire of 3 square millimeters or more (nickel sheets cannot be used)

Note 2: Strictly connect 0V, 4.2V, 8.4V, 12.6V according to the diagram. Do not touch any components on the board when soldering the wire. Do not intentionally short circuit.

Note 3: When soldering the battery for the first time or when charging is in progress, as long as the single battery exceeds 4.2V, the "430" resistor will heat up and discharge (discharge to about 4.19V to stop heating). If the "430" resistor is severely hot, check if the wrong line is connected.

Hardware preparation

Prepare 3S 12.6V 40A lithium battery protection module, battery, power supply, high power load resistor

The figure below shows the module discharge diagram. The battery is 3 strings. The connected battery needs to meet the 40A discharge current. It can be realized by paralleling the battery or purchasing a battery with a large discharge current. For example, if the battery is 2000mAH and the discharge multiple is 10C, then only 3 strings of 2 are needed and the discharge current is 40A.

The figure below shows the battery charging diagram. The charging voltage is DC12.6V~13.6V. The charging current depends on the battery connected, and the maximum is no more than 20A. The module has a balanced charging path, and the equalization function works only when the battery performance is not much different.

Introduction

Product Name: 4 string 14.8V 16.8V 40A lithium battery protection board

Charging voltage: DC 16.8V~17V

Continuous discharge current: 40A maximum (if the heat dissipation environment is not good, please reduce the load current)

Continuous charging current: up to 20A

Balance VersionProduct size: 45*60*4mm

Enhance VersionProduct size: 44*55*4mm

Applicable choice: applicable to the nominal voltage of 3.7V, fully charged 4.2V lithium battery

(including 18650, 26650, polymer lithium battery), can be drilled below 170W

Note 1: The successful start of the drill requires three 15C-20C power battery, or six 10C-15C power battery (ordinary 18650 can not start the drill!!).

Note 2: strictly according to map wiring 0V, 4.2V, 8.4V, 12.6V, 16.8V, do not deliberately short circuit.

Note 3: When the load of the brush motor is used, try to connect a non-polar capacitor (withstand voltage above 25V, capacity 10uF-100uF) to the motor's positive and negative terminals to prevent the reverse spike from the motor. Break the MOS tube.

Note 4: 4 groups of batteries in series, please ensure that the voltage of each group of batteries, if not the same, please fill each battery separately and then use in series. The The Discharge test, the voltage drop faster battery that group is poor battery.

The figure below shows the module discharge diagram. The battery is 4 strings. The connected battery needs to meet the 40A discharge current. It can be realized by paralleling the battery or purchasing a battery with a large discharge current. For example, the battery 2000mAH, the discharge multiple 10C, then only need 4 series 2 and the maximum current can reach the discharge current 40A, stable discharge requires 4 strings 4 and can be, and need to pay attention to heat dissipation, the discharge battery power will drop rapidly.

Balance Version:

Enhance Version:

The picture below shows the battery charging diagram, 4 series of batteries, the actual full charge, voltage 16.8V, charging voltage DC17V-18V, charging current depends on the battery connected, the maximum does not exceed 20A.

Enhance Version:

Introduction

Product name:3S lithium battery protection board 60A enhanced version

(1) Product description:This product is used to charge / discharge three groups of lithium batteries in series, and each group can connect multiple lithium batteries in parallel. It can

Withstand continuous charging current 20A, continuous discharge current 40A, instantaneous current below 80A. used

During the process, the heat dissipation conditions should be good. If the heat dissipation conditions are not good, please reduce the current usage and do not let the board

The child has a noticeably hot feeling. During charging and discharging, it has overcharge protection, overdischarge protection, and overcurrent

Protection, short circuit protection. This product can be used in electric drills, sprayers, LED lights, low power reverse.

Charge and discharge batteries of transformers and other products.

(2) Product parameters:

◆ Product model: HW-552;

◆ Size: 41 * 60 * 1mm;

Charging voltage: 12.6V-13V;

◆ Maximum working current: 60A (heat dissipation conditions are very good);

◆ Continuous charging current (upper limit): 20A;

◆ Continuous discharge current (upper limit): 40A;

◆ Overcurrent protection: 125A;.

◆ Overcharge detection: 12.8V (for 3 groups of batteries);

◆ Overcharge release: 12.3V (for 3 groups of batteries);

◆ Overdischarge detection: 2.4V (for 1 group of batteries);

◆ Overdischarge release: 3.0V (for 1 group of batteries);

◆ Short circuit protection: Yes;

◆ Working temperature: -40-- + 85C;

◆ Storage conditions: -40-- + 125C.

(3) Instructions for use:

Three usage scenarios

A. Charging (overcharge protection)

(1) First, the wiring must be strictly in accordance with the above figure. Use good wires and good contact

Good, because even a small resistance will cause a large current to flow.

Pressure drop and generate a lot of heat, which affects the performance of the board.

(2) Connect the 13V power supply to the charging end of the board and start charging.

(3) The board will detect the total series voltage of the three groups of batteries. When the voltage reaches 12.8V, the board will

Turn off the battery charging circuit, this is the overcharge protection

(4) When the battery pack voltage drops below 12.3V, the overcharge protection contacts and the board will open again

The battery charging circuit is overcharged.

(5) If the board turns on overcurrent / short circuit protection for some reason during charging, you

To remove the connection on the load side, and then turn off the power and restart, you can cancel the overcurrent protection.

You can also disconnect the load, wait a few seconds, and the overcurrent protection is automatically canceled.

B. Discharge (overdischarge protection)

(1) Wiring must be performed strictly in accordance with the figure above. Use good wires and good contact because

Even if the resistance is not too large, when a large current flows, it will cause a large voltage drop, and

Generates a lot of heat, which affects the performance of the board.

(2) Turn on the load, and the lithium battery pack supplies power to the load through the board. With good heat dissipation, the board can

Withstand a continuous current of 40A, if the heat dissipation is very good, even to reach 60A.

(3) During the discharging process, when it is detected that the voltage of a certain group of batteries drops to the over-discharge voltage limit, the board

Turn on over-discharge protection and turn off discharge. Note that the battery voltage detected during board discharge

Will be lower than measuring the voltage across the battery with a multimeter, which is caused by the wires and the battery

, So after the over-discharge protection is turned on, you use a voltmeter to measure the voltage across the battery, which is often higher than

2.4V. In addition, the "0v" terminal on the board and the battery indirect line are not good, which will cause overdischarge.

The protection voltage is higher than 2.4V.

(4) When the battery voltage rises above 3V, the over-discharge protection is released. If over-discharge protection is not available

In addition, the load can be disconnected and the over-discharge protection will be released.

C. Overcurrent protection.

When the current is too large, the board turns on overcurrent protection, the line connection is disconnected, and the charging or

Discharge.

Successful start of electric drill conditions:

(1) The discharge current of the battery must reach the minimum starting current of the electric drill;

(2) The connection between the battery pack and the protection board should be as short as possible, and the wire core should be as thick as possible;

(3) Other conditions are found and supplemented separately.

Function diagram: