BMS 3s4s 4A7a Protect Circuit for 18650 Battery

Name: BMS 3s4s 4A7a Protect Circuit for 18650 Battery
Brand: Shenzhen Li-ion Battery Bodyguard Technology Co., Limited
SKU: 878989035

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

US$1.76

10-999 Pieces

US$1.32

1,000+ Pieces

Sample price:US$1.76/piece.Request sample

Product profile

Customization

Available

Overcharge Protection

Yes

Ovediscahrge Protection

Yes

Model NO.

LWS-4S7A-011

Over Current Protection

Yes

Balance Function

Usage

Lithium Battery Packs, LiFePO4 etc

Application

Digital Equipment, Electrice, Ebike, etc

Delivery Time

7-15 Days After Payment for Small Order

Metal Coating

Copper

Mode of Production

SMT

Layers

Multilayer

Base Material

Fr-4

Certification

RoHS, ISO

Customized

Condition

New

Transport Package

in: Vacuum Packing/out: Packing: Carton Packing

Specification

53*17*2.6

Trademark

lws

Origin

Shenzhen, Guangdong

HS Code

8536300000

Production Capacity

10000/Month

Key features

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

Smart Balance Function: Ensures voltage consistency across cells for extended battery life and stable performance.

OEM and ODM Services: Full customization support including design, samples, and flexible production options.

High-Quality Components: Utilizes high-end IC and MOSFETs for stable quality and reliable working performance.

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

Multiple Certifications: Certified with ISO9001, ISO14001, CE, and RoHS for quality and safety compliance.

Fast Delivery: Delivery within 7-15 days after payment for small orders.

No Minimum Order Quantity: Accepts orders of any size with various capacity and size options available.

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: ≤6.62h

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 do I judge what material my battery is?

Please take a look at the battery body. If the normal voltage of your battery shows as 3.2V, the battery will be LiFePo4. If the normal voltage of your battery shows as 3.6V or 3.7V, the battery will be Li-ion or Li-polymer battery. You can also ask battery manufacturer the material of battery.

Q:Can I use this protection circuit board for my battery?

There are 2 questions: How much cells in series is your battery pack? The protection circuit board you need to buy must be same cells in series as your battery pack. What material is your battery? Only the LiFePo4 battery has different electric parameter from other battery, so if you need buy the protection circuit board for LiFePo4 battery, Please let us know firstly.

Q:Do we need cell balance or not?

The function of balance: Since battery is made of many pcs of cells in parallel and in series, the cells can't be the same as no two people in the world is the same, so can only put in group with similar performance is not consistent, which will lead to each cell voltage is not consistent as well after the completion of the charging if without balance function

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

No, We don't have MOQ, Different customer have different requirement, We can provide various capacity and size as per your requirements, Also ODM / OEM is welcome.

Q:What is your term of payment?

PayPal, T/T, L/C, Western Union