3 series 12V 18650 lithium battery protection board 11.1V12.6V with balanced 25A overcurrent, charge and discharge protection

Product Parameter

Note: To achieve better consistency and balance, try to use a 13V switch source for charging (with a self stopping current below 30mA). Because the balancing current of the balancing IC is around 45mA, and most 12.6V lithium battery chargers on the market will automatically stop when the charging current is detected to be below 100mA. Before balancing, there will be no charge coming in, resulting in an unbalanced voltage of each battery group. Regarding the issue of voltage drop between the battery voltage and the output terminal voltage, the working principle of this type of protection board is negative electrode protection. When just assembled, some may experience a voltage drop of 0.1-0.3V, which can be reduced by cycling the charging and discharging several times. This is a normal phenomenon. Try not to use a 12V power supply for the charger. A 3-string lithium battery is fully charged at 12.6V, and charging with a 12V power supply will result in insufficient charging. The protective board will not protect it and will continue to charge. Long term use will affect the battery life. Thank you for your understanding.

Product Be Careful

This protective board cannot be used for lithium iron phosphate batteries, hernia lamps, hand drill battery packs, electric fishing machine battery packs, electric bicycle battery packs, children's car batteries, 775 (4A) and above motors, and 1W fisheye LED lights. Customers who purchase the above combinations are advised to pay attention!.

The power range described is applicable to the following products:

Massager battery pack, LED light backup power supply, 12V electronic products, solar street light battery pack, monitoring backup power supply, and other products.

Attention: For discharge products with a current of 3A or higher, the battery discharge rate should be 3C or higher.

Ratio calculation formula: A 1C rate battery with a capacity of 2000 is equal to 2AH * 1=2A working current.

3C rate battery, 2000 capacity equals 2AH * 3=6A working current.

During use, the battery will heat up due to the unsuitable battery rate, which cannot be used for a long time as the battery will quickly damage.

Attention 1: Strictly follow the wiring diagram for 0V (B -), 3.7V (B1), 7.4V (B2), 11.1V (B+), and do not intentionally short circuit!

Note 2: After connecting the cable, it is necessary to charge it first before there is output.

Note 3: When connecting 3 groups of batteries in series, please ensure that the voltage of each group of batteries is the same. If they are not the same, please fully charge each group of batteries separately before using them in series. The group of batteries with the fastest voltage drop during discharge testing is the poor battery.

Just to clarify: Do not mix good and poor batteries together for use! The closer the capacity/internal resistance of the three sets of batteries, the better! The usage effect of 2 good batteries+1 poor battery=the usage effect of 3 poor batteries.

Product Attribute

The properties of the lithium battery protection board are:

Model: HX-3S-FL25A-A

Overcharge voltage range: 4.25-4.35v ± 0.05v

Size: 56*45*4.0mm

Overdischarge voltage range: 2.3-3.0v±0.05v

Upper limit working current: 20-25A (pay attention to heat dissipation)

Working temperature:- 40---+50℃

Maximum instantaneous current: 35-40A

Storage conditions:- 40-- +80℃

Static current: less than 30uA

Effective lifespan: greater than 30000 hours

Internal resistance: less than 100m Ω

Short circuit protection: capable of protection and delayed self recovery.

Balanced current: 45mA

Charging voltage: 12.6V-13V

Test point description: When S1 and S2 are short circuited, P+P - will output voltage, indicating that all MOS protections are normal. Adding a normally open temperature detection can expand the temperature protection function.

The size and device description of the protective board;

The size of the protective board is 56 * 45 * 4.0mm; The components are Hongkang 2110-CB protection chip+Hongkang BB3A balanced IC and genuine AOD472 * 8 or AOD452 * 8;

Note: The nickel sheets and accessories described and displayed below are not included in the price of the product in this link. The shipment is for a single board

Product Precautions

Product Questions and Answers

1. Can I use your protective board for my battery?

Answer: There are two issues to consider when using this protective board: First, how many strings of batteries do you have, and you need to buy a protective board that corresponds to the number of strings. 2、 What material is your battery made of? We have two types of protective plates for lithium iron phosphate and polymer lithium batteries. If your battery is a single cell of lithium iron phosphate with a nominal voltage of 3.2V, you need to choose the 3.2V lithium iron phosphate in the classification. If it is a single cell of polymer (ternary, cobalt acid, manganese acid lithium battery) with a nominal voltage of 3.6V (or 3.7V), please choose the 3.7V polymer classification.

2. How can I determine what material my battery is made of?

Answer: You can take a look at the nominal voltage of your battery. Lithium iron phosphate batteries are usually rated at 3.2V, while other batteries are usually rated at 3.6V or 3.7V. You can also directly ask the seller what material the battery is made of. Many buyers say that my battery is 18650 or 26650 soft pack, etc. This is the appearance, not the material! We are unable to determine your battery protection parameters based on this.

3. How many A protection boards should I choose?

Answer: The number of A protection boards to choose depends on the power of your product or the current limit of the controller. For example, choose 10A for those below 100W, 20A for those below 200W, and 25A for those below 300W, For those above 500W, please contact our Wangwang first. The current of the protection board cannot be less than the current limit of the controller.

4. Can I use this protective board with my 20AH battery?

Answer: The size of your battery capacity is not directly related to the current using this board. A large capacity is not necessarily a large battery, but mainly depends on the continuous current. That is to say, the greater your power, the greater the continuous current of the protection board you choose, which is not directly related to your battery capacity.

5. How should the charger voltage be set?

Lithium batteries should be charged with a dedicated charger for lithium batteries, and lead-acid battery chargers should not be used. Lead acid charging may cause high-voltage breakdown of the protective board MOS tube, resulting in overcharging and lack of protection for the protective board.

Charger voltage setting: Use your battery pack string number * 4.2V, which is the charging voltage for non iron lithium batteries. The charging voltage for iron lithium batteries is the battery string number * 3.60V, which is the charging voltage for iron lithium batteries. The charging current standard is 0.2 times the capacity.

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