A Battery Management System (BMS) and Battery Protection PCB are critical solutions for ensuring battery safety, performance, and longevity. While a battery protection PCB offers basic safeguards—such as overcharge, over-discharge, and short-circuit protection—ideal for 3C and cost-sensitive applications, a BMS goes further. It monitors voltage, current, temperature, and state of charge, enabling cell balancing and intelligent battery control. These systems are essential in advanced battery packs for electric vehicles, energy storage, and industrial equipment.
Prototype
No MOQ for prototyping and we have special offer for business clients. Lead time fastest within 24 hours.
Mass Production
Being the long-term strategic supplier of many industry leaders, Asunny is your trustworthy PCB manufacturer. Our monthly capacity is 300,000 m².
Assembly
Our assembly service is available for both small-volume and large-volume production. Our featured service is Flex PCB assembly, with 100k pcs of daily production.
Our long-term Partners
End Clients, EMS, OEM & ODM companies we are working with.
Asunny’s goal is to enhance our partners’ supply chain by establishing long-term relationship and striving to be the most reliable PCB supplier. In the past three decades, we have proven our ability to achieve this goal.
Product showcase
Featured Flexible PCB manufactured by Asunny
We manufacture Flex PCB size up to 1.8m*0.5m and up to 8 layers. Our FPCB end clients include Daimler, BYD, Xiaomi, CATL and Desay etc. Our Flex PCB has been applied on various industries such as automotive, new energy, telecommunications, and wearables etc.
Smartphone Battery Protection SIP Flex PCB
Layer count:2-layer SIP FPCB with blind via
Application:Battery Protection and Monitoring FPCB
1st-order Smartphone Battery Protection SIP HDI PCB
Layer count: 6 layers
Application:Smartphone Battery Protection
1.8m EV BMS Flex PCBA
Layer count: Single-Sided
Application: Battery Cell Monitoring Flex Board for Electric Vehicle (EV) Battery Management System (BMS)
EV BMS Flex PCBA
Layer count: Single-sided
Application: Flexible sensing and communication harness for Battery Management System
Smartphone BMS Rigid Flex PCB
Layer count: 6 layers
Application: Smartphone battery interconnect and management FPCB
Smartwatch Battery Protection Rigid Flex PCB
Layer count: 6 layers
Application: Smartwatch battery protection and monitoring RFPCB
Laptop Battery BMS PCB
Layer count: 4 layers
Application:Battery Management System (BMS) PCB for laptop battery packs
Tablet BMS Rigid Flex PCB
Layer count: 6 layers
Application: Battery Management and Interconnect RFPCB
Drone BMS PCB
Layer count: 4 layers, through-hole with copper paste filled vias and plated caps
Application: High-current BMS PCB for drone battery packs
TOP-TIER MANUFACTURER IN CHINA
OUR ADVANCED TECHNOLOGY
Asunny is the leader in BMS PCB and SIP smartphone battery protection boards. We ranks number one in the China market in terms of production volume and market share for Smartphone Battery Protection board.
System-in-Package
SIP technology optimises smartphone battery protection boards by consolidating critical components into a compact, reliable package.
HDI Builds
Our HDI capability is up to 3+N+3 for large batch manufacturing and any layer for prototyping.
Laser Drilling Via
Blind via, Buried via, micro via, smallest to 0.075mm
Our PCB Manufacturing Capabilities
| Features | Capability |
|---|---|
| Via Type | Blind via, Buried via, Through-hole via |
| Layer Count | 4~22 layers (evaluation require for above 22 layers) |
| HDI build | HDI: 1+1+N+1+1, 2+N+2. 3+N+3 (≥4 orders require evaluation） |
| Min. mechanical drilling | 0.15mm |
| Min. laser drilling | 0.10mm standard, 0.075mm advanced |
| Min. controlled depth drilling | PTH: 0.15mm; NPTH: 0.25mm |
| Copper weight (finished) | 18μm – 70μm |
| Min trace/spacing | 0.065mm/0.065mm |
| PCB thickness | 0.2-0.4mm (evaluation required for less than 0.2mm or greater than 4mm) |
| Max. PCB dimension(finished) | 610mm x 450mm; dependant upon laser drilling machine |
| Materials | FR4 standard, FR4 high performance, Halogen free FR4, Rogers, Isola, Oak-Mitsui, Shengyi, any upon request |
| Surface finishes | OSP, ENIG, Immersion tin, Immersion silver, Electrolytic gold, Gold fingers |
Why Choose Us
Why Choose Asunny For BMS PCB?
Asunny is the leader in BMS PCB and smartphone battery protection boards. We ranks number one in the China market in terms of production volume and market share for Smartphone Battery Protection PCB.
30 years of Experience
With nearly 30 years of smartphone FPCB and RFPCB experience, Asunny holds the largest market share in the smartphone battery market in China.
Cutting-Edge Technology
Advancements in SIP and HDI technology. Our BMS PCB end clients include Samsung, Huawei, BYD, Honor, Xiaomi, Oppo and Vivo etc.
Faster lead time
1 to 2 days faster than average manufacturers; Double-sided board samples delivered in shortest 4 days, SIP samples in shortest 6 days
Full-feature Manufacturer
We produce full-range of PCB and offer in-house assembly services. You can get all your projects produced and assembled one-stop.
How it works
PCB Order Process
With our streamlined process, we give any quotation within 24 hours and large batch production in 15 days
1. Submit your RFQ online or through email
Upload or send us your project details including Gerber files, BOM, and other files
2. Quotation and EQs in 24 hours
We will send your our offer and EQs in 24 hours
3. Review and Payment
Review our offer and provide your feedback. After everything is confirmed, you can pay for your order using online payment or direct wire transfer.
4. Quality Check and Delivery
Production will start within 24 hours after payment. Your PCBs and PCBA will go through 100% quality check including AOI, Flying Probe test, E-fixture, Visual Inspection and others. We offer tracked shipping and express shipping (1-3 days air freight).
Explore our wide range of products and services
Our featured products include advanced PCB, Flex PCB, Rigid-Flex PCB and HDI PCB etc. We also provide components procurement service and assembly service.
Multilayer PCB
Manufacturing Price Starts From
$
0.1
Piece Price
- Prototype Lead time 3~7 days
- Manufacturing Lead time 15~20 days
- Layer Count 1~20
- Assembly in-house
- Controlled Impedance PCB
- High-speed materials
*Currently, we accept PayPal, Card Payment and Wire Transfer payment methods.
Advanced/HDI PCB
Manufacturing Price Starts From
$
0.3
Piece Price
- Prototype Lead time: 7~10 days
- Manufacturing Lead time: 15~20 days
- HDI Capability: up to 3+N+3
- Layer Count 1~20
- Assembly in-house
- Via: Blind, Buried, Through-hole
*Currently, we accept PayPal, Card Payment and Wire Transfer payment methods.
Flex and Rigid-Flex PCB
Manufacturing Price Starts From
$
0.1
Piece Price
- Prototype Lead time 3~5 days days
- Manufacturing Lead time 15~20 days
- Layer Count 1~10
- Assembly in-house
- Max Dimension 2000mm*550mm
- Sttifeners: PI, FR4, Steel, Tape
*Currently, we accept PayPal, Card Payment and Wire Transfer payment methods.
Need support?
CONTACT YOUR DEDICATED MANAGER FOR SUPPORT
Rebecca Lu
International sales manager
Based in Oxford, Rebecca has 2 years of experience in Amazon UK and 3 years of PCB industrial experience. She is fluent in both English and Mandarin.
Xi Yang
Senior Sales Manager
Xi has been working in Asunny since 2002. She has rich project experience and deep understanding of the industry. Reach out for Mandarin service.
Lynn Zhu
Sales Assistant
Lynn has 2 years of industry experience. She studied and worked in Korea for the past 8 years. She is fluent in Korean and Mandarin.
Chao Jun Pu
Engineering Lead
Chao Jun has been in the industry for over 8 years and he worked in a few listed companies. He has rich product and project experience.
Common Questions
Most Popular Questions.
If you have any other questions, please contact us for support
Protection boards safeguard single lithium-ion cells against overcharging, over-discharging, and short circuits, offering basic, cost-effective safety. Battery Management Systems (BMS) manage multi-cell packs holistically, integrating protection boards with sensors, controllers, and communication interfaces. A BMS monitors cell-level voltage/temperature, balances charge distribution, and optimises charging/discharging to enhance safety, capacity, and lifespan. While protection boards focus on core hazards, BMS adds advanced control for complex, multi-cell battery systems. We are able to manufacture both.
Yes, BMS and Battery Protection boards can be fully customised in terms of size, length, shape, layer count, and materials to meet any specific requirements. This type of boards are most commonly used in industries including automotive, consumer electronics and energy storage.
Please refer to our standard lead time :1 to 2 days faster than average manufacturers; Double-sided board samples delivered in shortest 4 days, SIP samples in shortest 6 days
We can refund your prototyping fee if you proceed to mass production with us. Please get in touch with us to learn more about what we offer to our long-term business partners.
We hold all the essential quality management certificates such as ISO9001. Please check out our certifications at about us section. All our Flexible PCBs are tested under IPC-TM-650 standards. If there are any issues with your orders, you can always get in touch with you assigned account manager for a product exchange or return.
Lets get your PCB project started!
We are the full-feature PCB & FPCB manufacturer and Assembly services provider
Need Help?
Don’t hesitate to contact us for more information about company or service
Headquarter Address：Gangxing Road 128, Jiujiang City, Jiang Xi province, China
Sales Centre: Nanshan CTF centre Room 2603, Shenzhen; 81 St.Clement's Angel Court, Oxford
Sales Centre: Nanshan CTF centre Room 2603, Shenzhen; 81 St.Clement's Angel Court, Oxford
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