What are the key specifications of this BMS?

It features a 12.6V charging voltage, 12A max continuous charge/discharge current, 4.2V balance voltage, and 40A over-current protection.

Is this product certified?

Yes, we hold ISO9001, ISO14001, CE, and ROHS certificates.

BMS 4s 12A Lithium Battery Pack E-Bike PCB PCM Board

Name: BMS 4s 12A Lithium Battery Pack E-Bike PCB PCM Board
Brand: Shenzhen Li-ion Battery Bodyguard Technology Co., Limited
SKU: 906888625

Guangdong, ChinaShenzhen Li-ion Battery Bodyguard Technology Co., Limited

US$5.00

1-99 Pieces

US$4.00

100-998 Pieces

US$1.20

999+ Pieces

Sample price:US$10.00/piece.Request sample

Product profile

Customization

Available

BMS Type

3s/4s Li-ion/Lithium Ion Battery BMS

Charging Current

12A

Model NO.

LWS-4S12A-167

Type Voltage

12.6V

PCM Size

L60*W30*T3.5mm

Balance Voltage

4.2V

Over Current Protection

40+-5A

Over Charge Protection

4.25V

Over Discharge Protection

2.70V

Type

Flexible Circuit Board

Dielectric

Fr-4

Material

Fiberglass Epoxy Resin + Polyimide Resin

Application

Consumer Electronics

Processing Technology

Delay Pressure Foil

Base Material

Copper

Insulation Materials

Epoxy Resin

Transport Package

Anti-Static Bag Packaging/ Carton Packaging

Origin

China

HS Code

8536300000

Production Capacity

50000 Pieces /Months

Key features

Smart Balance Function: Ensures consistent cell voltage to improve overall battery performance and stability.

Comprehensive Protection: Protects against over-charge, over-discharge, over-current, short-circuit, and temperature issues.

Premium Components: Uses original imported ICs from Japan, MOSFETs from USA, and components from Samsung.

Flexible Application: Can be used for fewer series batteries by leaving connection pins at empty status.

OEM/ODM Support: Offers full customization services including samples, designs, and flexible adjustments.

Rigorous Testing: Passed 1.2m drop test, short circuit, overcharge, and over-discharge tests with 100% inspection.

Fast Delivery: Off-season lead time within 15 workdays; peak season within one month.

Company profile

Self-brandedPatents AwardedYears of Export ExperienceHigh Repeat Buyers Choice

Shenzhen Li-ion Battery Bodyguard Technology Co., Limited

Guangdong, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 12 years CertifiedNearest Port: Shenzhen Port, Hong Kong PortAverage Response Time: ≤6.23h

AI-Powered supplier vetting

SummaryThe supplier presents itself as a Battery BMS manufacturer with documented quality, service, R&D, and production processes. It reports OEM and ODM services, SDK availability, 3D design, broad customization, recent new-product activity, and documented design and verification records. Production-related evidence includes SMT, screen printing, reflow soldering, AOI, coating, drying, packaging, and dedicated testing equipment, with standardized finished-product inspection instructions. It has participated in several offline trade shows and identifies Shenzhen and Hong Kong ports as nearby logistics points. However, the provided information does not establish certifications, named customer cases, or financial performance; it also reports no overseas warehouses, showrooms, agents, or branches.

Supplier typeThe supplier identifies itself as an active Battery BMS manufacturer and reports both OEM services for well-known brands and ODM services. This supports classification as a BMS manufacturer with contract design and manufacturing capabilities.

After-Sales capabilityThe supplier reports clear procedures and followed records for corrective and preventive actions and customer complaint handling. Its technology engineers also provide technical support for production and after-sales service, indicating documented and technically supported after-sales processes.

R&D capabilityR&D engineers handle customer-request confirmation, technical support, and new-product development; design input, output, review, verification, and validation documents are reportedly available for audit. The supplier also reports new products within the past year, ODM capability, and SDK availability, providing explicit evidence of active R&D capability.

Production capacityThe supplier reports multiple manufacturing and testing facilities, including SMT, screen printing, reflow soldering, AOI, coating, drying, packaging, and dedicated power-protection-board testing equipment. It also states that finished-product inspection instructions are available and uniformly followed, while quality assurance and written supplier-service assessment procedures are reported.

Customization capabilityThe supplier provides 3D software design services and reports customization from samples, designs, flexible customization, minor customization, and full customization. These statements directly support broad product and design customization capability.

Product Q&A

Q:How many Ampere protection circuit boards should I choose?

It depends on your load power, such as electric motor power. Please contact sales or technical support before buying.

Q:What is the distinction between same port wiring and different port wiring?

For different port wiring, the cathode of the charger and load is different. For same port wiring, the cathode is the same, and charging current equals discharge current.

Q:What is the distinction between balance and unbalance function?

The equilibrium function discharges high voltage cells with a resistor to wait for low voltage cells, achieving consistent cell voltage to improve battery performance.

Q:Do you have a Minimum Order Requirement (MOQ)?

No, we do not have an MOQ. We can provide various capacities and sizes per your requirements, and ODM/OEM is welcome.

Q:What is your term of payment?

We accept PayPal, T/T, and L/C.