1PCS 3S 4S 5S BMS 100A 12V 16.8V 18V 21V 18650 Li-ion Ternary LMO Lithium Battery Protection Circuit Board with Balance Charging

$4.16

Includes all taxes

Ships From
Quantity
Meet your Seller
Delivery options
  • Ship Only

Description

🔋 Product Overview — QS-B305ABL-50A Lithium Battery Protection Board

Product Structure: Lithium battery protection board
Application Range: LiFePO4, Ternary Li-ion (NMC/NCA), Lithium Cobalt Oxide (LCO), Lithium Manganese Oxide (LMO) packs

⚙️ Model Highlights
  • Designed for 3S / 4S / 5S packs; common version can be configured per actual needs

  • Mature protection circuit with dedicated IC, supports wire-disconnection protection

  • Imported high-current, ultra-low RDS(on) MOSFETs (single MOS as low as ~3 mΩ)

🛡️ Core Protections
  • Complete and stable charge and discharge protection logic

  • Overcharge, overdischarge, overcurrent, short-circuit, and disconnection handling

  • Designed to enhance pack reliability in daily use

⚡ Power Path & Components
  • High-current MOS array helps reduce conduction losses

  • Topology optimized for stable charging/discharging performance

🧮 Cell Balancing
  • Hardware balancing for cells

  • Balanced current set appropriately; heat distribution is reasonable

  • Balancing is designed not to impair overall pack performance

✅ Supported chemistries: LiFePO4, NMC/NCA, LCO, LMO (configure 3S/4S/5S as required)

Note: Actual configuration depends on the required series count and component selection in the common version. Ensure cell consistency and correct wiring before operation.

⚡ Functional Features — Flexible Setup & High Power Design

🔄 Flexible Series Configuration

Users can freely configure 3S / 4S / 5S setups.
By default, the board will be shipped according to the customer’s selected series count.
Simply connect according to the matching wiring diagram — no modification required.
If another series configuration is needed, users can adjust it themselves by following the provided operation guide.

⚙️ Same-Port & Split-Port Compatible

This protection board uses 15 high-power ultra-low resistance MOSFETs (8 for discharge, 7 for charge).

  • Same-Port Mode: Discharge 60A / Charge 60A

  • Split-Port Mode: Discharge 80A / Charge 60A

✅ Absolutely different from the low-power MOS solutions on the market.
Each MOS has an internal resistance as low as ~3 mΩ, ensuring superior efficiency and heat control.

Technical Parameters

LiFePO4 Protection Board Parameters (3.6V / 3.7V)


Protection Project

Min

Typ

Max

Unit

Overcharge Voltage

3.61

3.65

3.69

V

Overcharge Recovery Voltage

3.5

3.55

3.6

V

Overcharge Protection Delay

500

1000

1500

mS

Overdischarge Voltage

2.27

2.35

2.43

V

Overdischarge Recovery Voltage

2.45

2.55

2.65

V

Overdischarge Protection Delay

500

1000

1500

mS

Overdischarge Protection Current


100


A

Split Discharge Current (Continuous)


50

80

A

Same Port Discharge Current (Cont.)


40

60

A

Overdischarge Protection Delay

100

200

300

mS

Overcharge Protection Current


100


A

Charging Current (Continuous)


40

60

A

Overcharge Current Protection Delay

10

20

30

mS

Quiescent Current


17

25

μA

Temperature Protection


With temperature control interface



Disconnection Protection


Yes



Short Circuit Protection


Yes



Short Circuit Delay

100

300

600

μS

Over Current Protection Recovery Mode


Disconnect load release



Balance Function


Yes



Equalizing Voltage


3.405


V

Equalizing Current


60


mA

Fuselage Size


62×42×4


mm

Body Color


White (PCB)



Fuselage Weight


17


g

Standard Accessories


Circuit board



Standard Packaging


Electrostatic bag



Wire Specification


None



Conductor Length


None


cm

Working Temperature


-20℃~+65℃


Storage Temperature


-40℃~+85℃



Polymer / Ternary Lithium / Lithium Manganese Oxide Protection Board Parameters (3.6V / 3.7V)


Protection Project

Min

Typ

Max

Unit

Overcharge Voltage

4.21

4.25

4.29

V

Overcharge Recovery Voltage

4.14

4.19

4.24

V

Overcharge Protection Delay

500

1000

1500

mS

Overdischarge Voltage

2.72

2.8

2.88

V

Overdischarge Recovery Voltage

2.9

3.0

3.1

V

Overdischarge Protection Delay

500

1000

1500

mS

Overdischarge Protection Current


100


A

Split Discharge Current (Continuous)


50

80

A

Same Port Discharge Current (Cont.)


40

60

A

Overdischarge Protection Delay

100

200

300

mS

Overcharge Protection Current


100


A

Charging Current (Continuous)


40

60

A

Overcharge Current Protection Delay

10

20

30

mS

Quiescent Current


17

25

μA

Temperature Protection


With temperature control interface



Disconnection Protection


Yes



Short Circuit Protection


Yes



Short Circuit Delay

100

300

600

μS

Over Current Protection Recovery Mode


Disconnect load release



Balance Function


Yes



Equalizing Voltage


4.18


V

Equalizing Current


60


mA

Fuselage Size


62×42×4


mm

Body Color


White (PCB)



Fuselage Weight


17


g

Standard Accessories


Circuit board



Standard Packaging


Electrostatic bag



Wire Specification


None



Conductor Length


None


cm

Working Temperature


-20℃ ~ +65℃


Storage Temperature


-40℃ ~ +85℃




⚙️ OPERATION GUIDE

Practical Operation Guide

🔋 Output Current: Split Port 80A | Same Port 60A

⚠️ Note: Lithium batteries must be charged with a dedicated lithium battery charger.
Do not use a lead-acid battery charger. Charging with a lead-acid charger may generate
high voltage that breaks down the MOS tubes of the protection board, causing the protection
board to fail in overcharge protection.

📘 (1) 3S Split-Port Wiring Method

(Refer to the 3S split-port wiring diagram)

  1. Connect 3 battery packs in series according to the wiring method of the 3S split-port wiring diagram.

  2. Connect the charger negative terminal to C- of the protection board, and the load negative terminal to P-.

  3. Connect the charger positive terminal and the load positive terminal to the positive terminal of the 3S battery pack.

  4. Use 3 wires to connect the positive terminals of the 3 battery packs in sequence to B+, B4, and B3.

  5. Connect the negative terminal of the 3S battery pack to B-. Short-circuit B1, B2, and B-.

  6. After all wires are connected according to the diagram, carefully check to ensure correctness. Confirm everything is correct before starting use.

  7. During use, when the indicator light on the protection board is ON, it means the corresponding battery group is in balancing working state (i.e., the battery voltages are unbalanced).


📘 (2) 3S Same-Port Wiring Method

(Refer to the 3S same-port wiring diagram)

  1. Connect 3 battery packs in series according to the wiring method of the 3S same-port wiring diagram.

  2. Connect the charger negative terminal and the load negative terminal to C-. Keep P- unconnected.

  3. Connect the charger positive terminal and the load positive terminal to the positive terminal of the 3S battery pack.

  4. Use 3 wires to connect the positive terminals of the 3 battery packs in sequence to B+, B4, and B3.

  5. Connect the negative terminal of the 3S battery pack to B-. Short-circuit B1, B2, and B-.

  6. After all wires are connected according to the diagram, carefully check to ensure correctness. Confirm everything is correct before starting use.

  7. During use, when the indicator light on the protection board is ON, it means the corresponding battery group is in balancing working state (i.e., the battery voltages are unbalanced).


📘 (3) 4S & 5S Wiring Methods

The wiring methods for 4S same-port / split-port and 5S same-port / split-port are similar to the 3S wiring methods. Please refer to the corresponding wiring diagrams.

  • 🔹 4S Split-Port Wiring → Refer to 4S split-port wiring diagram.

  • 🔹 4S Same-Port Wiring → Refer to 4S same-port wiring diagram.

  • 🔹 5S Split-Port Wiring → Refer to 5S split-port wiring diagram.

  • 🔹 5S Same-Port Wiring → Refer to 5S same-port wiring diagram.

⚠️ Please strictly follow the wiring diagrams for 4S or 5S to ensure correct installation and safe operation.

Payment Policy

Payment Policy – BILLIONS BIRDS

At BILLIONS BIRDS, we are committed to providing a safe, secure, and seamless payment experience for our customers.

1. Accepted Payment Methods

We accept the following payment options:

Major Credit & Debit Cards (Visa, MasterCard, American Express)

Secure Online Payment Gateways (such as PayPal, Stripe, or other providers available at checkout)

Any additional payment methods displayed during checkout

All payments must be completed in full at the time of purchase.

2. Secure Transactions

All transactions are processed through encrypted and secure payment systems to protect your personal and financial information. We do not store your full payment details on our servers.

3. Currency

Prices are displayed in the currency indicated on the website. If you are purchasing from another country, your bank may apply currency conversion fees.

4. Order Confirmation

Once your payment has been successfully processed, you will receive an order confirmation email containing your purchase details.

5. Failed or Declined Payments

If your payment is declined, please verify your billing information or contact your bank. Orders will only be processed after successful payment confirmation.

6. Fraud Prevention

BILLIONS BIRDS reserves the right to cancel or refuse any order if fraud or unauthorised activity is suspected.


Delivery Policy

Delivery Policy – BILLIONS BIRDS

At BILLIONS BIRDS, we are dedicated to delivering your orders safely and efficiently.

1. Order Processing

All orders are processed within 1–3 business days after payment confirmation. Orders are not processed or shipped on weekends or public holidays.

2. Shipping Times

Estimated delivery times vary depending on your location:

Domestic Shipping: 3–7 business days

International Shipping: 7–15 business days

Please note that delivery times are estimates and may vary due to customs procedures, carrier delays, weather conditions, or other unforeseen circumstances.

3. Shipping Costs

Shipping fees are calculated at checkout based on your location and selected shipping method. Any customs duties, taxes, or import fees are the customer's responsibility.

4. Tracking Information

Once your order has been shipped, you will receive a confirmation email with tracking details (if available) so you can monitor your package.

5. Delivery Issues

If your order is delayed, lost, or arrives damaged, please contact us within 7 days of the expected delivery date. We will work with the shipping carrier to resolve the issue as quickly as possible.

6. Incorrect Shipping Information

Customers are responsible for providing accurate shipping details at checkout. BILLIONS BIRDS is not responsible for orders shipped to incorrect addresses provided by the customer.


Refund Policy

Refund Policy – BILLIONS BIRDS

At BILLIONS BIRDS, customer satisfaction is our top priority. If you are not completely satisfied with your purchase, we’re here to help.

1. Return Eligibility

You may request a return within 14 days of receiving your order. To qualify for a return:

The item must be unused, unworn, and in the same condition as received.

The item must be in its original packaging.

Proof of purchase (order confirmation or receipt) is required.

Certain items may not be eligible for return, including clearance items, gift cards, or personalised/custom products.

2. Non-Refundable Items

The following items are non-refundable:

Final sale or discounted items

Gift cards

Items damaged due to misuse, negligence, or improper care

3. Return Process

To initiate a return, please contact our customer support team with your order number and reason for return. If your return is approved, you will receive instructions for returning the item.

Unless the item is defective or incorrect, customers are responsible for return shipping costs.

4. Refund Processing

Once we receive and inspect your returned item:

We will notify you of the approval or rejection of your refund.

If approved, the refund will be issued to your original payment method within 5–10 business days.

Please note that banks or payment providers may require additional time to process refunds.

5. Damaged or Incorrect Items

If you receive a damaged, defective, or incorrect item, please contact us within 7 days of delivery and provide clear photos of the product and packaging. We will arrange a replacement or full refund at no additional cost.

6. Late or Missing Refunds

If you have not received your refund:

Check your bank account again.

Contact your credit card company or payment provider.

If the issue persists, don't hesitate to contact our support team for assistance.

Recommended Products

Customer reviews

Share your thoughts with other customers

Be the first one to write a review!
live chat xb2bx
Items (0)
No Record Found

Your Shopping Bag Is Empty