4S 16.8 V BMS Design

@Mahmoud00Ibrahim

Hello, Your project fits well with my experience in power electronics and PCB design. I can develop a reliable 4S Li-ion BMS focused on safety, manufacturability, and stable long-term operation. I will design the schematic and PCB using a proven battery-management IC with integrated protection features, including over-charge, over-discharge, over-current, short-circuit, thermal protection, and accurate cell balancing. The design will follow recommended limits for 18650 Li-ion cells and include proper thermistor placement and protection timing considerations. You’ll receive the complete schematic, PCB layout, Gerber files, annotated BOM with sourcing information, and a design note explaining the protection strategy and balancing method. If firmware is required, I can also provide clean, well-documented source code and programming instructions. I look forward to discussing your requirements and building a robust BMS solution.

@abdurRafiqM

HI, I am an experienced electronics and PCB Design engineer, specialised in use of ECAD software such as Altium Designer, KICAD, EasyEDA, etc. for the the design of electronics and PCB. I will design your projects to meet your Requirements and the industry standard. I do all kinds of circuits such as Power delivery circuit, Sensor Integrated Circuits, wireless control, MCUs etc. I will deliver the following. The Schematics for your Design The PCB for the design Bill of materials(If needed) Gerber, Pick and Place and other manufacturing and assembly drawings needed. Full Support and consultancy till the project is done. Kindly send me message for my previous designs and also so we can discuss further on your project I look Forward to working with you. Best Regards, Abdur-Rafiq

@shivkantverma

Hi, Greetings! I am interested in working on your project. Could you please share the design details and technical requirements so we can discuss the project scope and key parameters in detail? I look forward to working with you. Thank you!

@shadabkhan92

As an experienced electrical engineer with a demonstrated proficiency in circuit design, embedded systems, and PCB layout, I am confident I can provide you with the cutting-edge Battery-Management System design you require. Of particular relevance to your project, my past work has involved developing intelligent systems that synergize AI with hardware, similar to the scope of your undertaking. AI-driven edge devices reading live sensor data and acting on it in real time? That's right up my alley. Moreover, I’ve honed my skills in Odoo ERP implementation and IoT hardware manufacturing as well. This blend ensures that your circuit design will integrate seamlessly within your existing workflows and is backed by solid infrastructure to ensure performance reliability. In terms of tangible results, my previous works have consistently delivered projects that meet or exceed industry standards while ensuring impeccable safety standards are upheld. To give you added confidence, all designs will undergo rigorous testing on my end following the clear acceptance criteria specified by you. Before finalizing the deliverables, all aspects including protection timings, balancing method and thermistor placement will be fully annotated in a design note to ensure comprehensive understanding at every level. So allow me to put my strategic problem-solving approach to work for you and bring your project to fruition exactly as envisioned from start to finish.

@Santoshchaulaga

Hello, I am Santosh Chaulagain, a professional Electrical Engineer and PCB Designer with over 7 years of experience in schematic design, PCB layout, and embedded systems, including ESP32, IoT devices, analog and digital circuits. I have successfully completed multiple projects for clients worldwide, delivering reliable and manufacturable designs. I have carefully reviewed your project requirements and I am confident that I can provide a high-quality solution tailored to your needs. My expertise includes PCB design using industry standards, component selection, BOM preparation, Gerber generation, and design optimization for cost and performance. I always ensure that my designs are fabrication-ready and tested for reliability. I focus on clear communication, timely delivery, and customer satisfaction. I am happy to discuss your project in detail and provide revisions until the final result meets your expectations. Looking forward to working with you. Best regards, Santosh C. Electrical Engineer | PCB Designer | ESP32 & IoT Specialist

@alluankit01

Hi, I can design the compact 4S 16.8V Li-ion BMS with over-charge, over-discharge, short-circuit, thermal protection, and cell balancing for 18650 chemistry. The best solution is to use a proven dedicated BMS IC unless MCU control is specifically required. I’ll define safe voltage/current/temperature thresholds, select suitable MOSFETs, balancing resistors, thermistor placement, connectors, and protection components, then prepare the schematic and PCB within the 180 × 65 mm target size. I’m comfortable with Li-ion BMS design, 4S battery packs, passive balancing, protection ICs, MOSFET selection, thermistor circuits, PCB layout, BOM preparation, Gerbers, and safety-focused documentation. Deliverables include: * Complete schematic * PCB layout * Ready Gerber files * Annotated BOM with footprints * Protection threshold notes * Balancing method explanation * Thermistor placement note * IC configuration/register sheet if used * Firmware/source files if MCU-based * Fabrication-ready handover I’ll focus on a safe, practical, and test-ready BMS design with clear protection behavior. Best regards Ankit

@ElecHamza

Hi, I can design your compact 4-cell Li-ion BMS using a dedicated multi-cell protection IC to ensure hardware-level reliability for over-voltage, under-voltage, short-circuit, and thermal cut-off. I will implement a balanced thermal layout with precise thermistor placement and cell-to-cell passive balancing calibrated to clear within your ±10 mV target. You will receive the complete schematic and optimized PCB layout under your 180x65x1 mm dimensions, ready-to-fabricate Gerbers, annotated BOM with direct supplier links, and a concise design note detailing protection timings. I am fully prepared to refine threshold settings based on your test results until every safety disconnect triggers precisely to your spec. Best regards

@bilalh585

I have worked on similar Li-ion battery management, power electronics, and PCB design projects, developing protection circuits and production-ready boards for embedded and industrial applications. I understand that safety, reliability, and accurate cell balancing are the highest priorities for this 4-cell Li-ion BMS. I can design a compact 4S (16.8 V) Battery Management System using a proven BMS IC or an MCU-assisted architecture if advanced control is required. The design will incorporate over-charge, over-discharge, over-current, short-circuit, thermal protection, and precise cell balancing while following recommended limits for 18650 Li-ion cells. The PCB will be optimized for low resistance, thermal performance, and manufacturability, with careful attention to trace widths, protection circuitry, and component placement. Deliverables: Complete schematic (Altium, KiCad, or EasyEDA) PCB layout with manufacturing-ready Gerber and drill files Annotated BOM with supplier links and footprints Protection design documentation (thresholds, timing, balancing strategy, thermistor placement) BMS IC configuration worksheet or register map Firmware source code, HEX file, and flashing guide (if MCU-based) Design review support for the first prototype I work with Altium Designer, KiCad, EasyEDA, LTspice, and MATLAB, and have experience designing battery-powered embedded hardware, power management circuits, and production-ready PCBs using DFM/EMI best practices. Best Regards, Bilal

@jb095

With over a decade of experience as an embedded systems engineer, PCB designer, and firmware developer, I possess the multifaceted skill set needed to complete this project to the highest standard. Throughout my career, I've tackled numerous designs for battery-powered devices and have built specific expertise in low power consumption. Given the criticality of protecting 18650 cells, balancing their voltages and safeguarding against dangers like short-circuiting and thermal issues, my skills align perfectly with your requirements. Regarding hardware, I am adept at working with Altium, KiCad, and EasyEDA. This familiarity extends to firmware development using various microcontrollers like your desired nRF52 series. Furthermore, I understand the importance of clear documentation for ease of use - which is why you can expect detailed work logs and a clean firmware package with well-commented codes from me. But don't take my word for it; let's let my work speak for itself: I am happy to provide references of past clients who can testify to my dedication to meeting specifications and delivering robust solutions within agreed timelines. With me on your side, you can remain confident in both the quality of design work produced and a smooth collaborative experience. Choose me for efficiency, ingenuity, reliability and watch your vision come to life!

@rfandelectronics

With my extensive expertise in RF and Electronics engineering, I am confident that I can craft a highly efficient Battery Management System (BMS) that will ensure your Li-ion pack operates optimally, while adhering to industry-standard safety guidelines. Drawing from years of designing high-frequency PCBs, I am capable of delivering a compact, reliable and well-integrated solution for your 4-cell Li-ion pack that hits the desired 16.8V mark at full charge. My proficiency in Altium, KiCad and EasyEDA ensures you have a versatile design process with several tools to choose from. My thorough approach will encompass every essential aspect; over-charge, over-discharge, short-circuit protection, thermal cut-off and cell-to-cell balancing will all be addressed meticulously to present a board that conforms to your stated specifications. The delivered schematic in addition to the PCB layout with Gerbers ready for fabrication will complete the package for you.

@djalltra

Hello, I’ve worked on battery-powered and power management designs where safety, reliability, and manufacturability were the main priorities. For your 4S Li-ion BMS, the focus will be on achieving dependable protection while keeping the circuit compact and straightforward to manufacture. The design will include overcharge, overdischarge, over-current, short-circuit, temperature protection, and precise cell balancing using components selected for 18650 cells and industry-standard protection limits. I'll recommend either passive or active balancing based on the performance-to-cost trade-off and explain the reasoning behind the choice. The final package will include the schematic, PCB layout, fabrication-ready Gerbers, an annotated BOM with sourcing links, and documentation describing the protection thresholds, balancing method, and thermistor placement. If the design requires firmware, I'll also provide the complete source code, compiled hex file, and programming instructions. Before finalizing the design, I'll verify that the protection limits and balancing performance align with your testing requirements, ensuring the prototype is ready for evaluation with minimal revisions. I look forward to discussing the project details.

@anjalio22

I would be glad to assist with the design of your 4S 16.8V Li-ion Battery Management System. I have experience designing reliable PCB solutions with industry-standard protection circuits and can deliver a compact, production-ready BMS tailored to your specifications. I will provide a complete schematic (Altium, KiCad, or EasyEDA), optimized PCB layout with manufacturing-ready Gerbers, an annotated BOM with sourcing links, and a concise design document covering protection thresholds, balancing strategy, thermistor placement, and timing. If an MCU-based solution is selected, I will also include well-documented firmware, HEX file, and flashing instructions. The design will prioritize safety, accurate cell balancing, and dependable protection against over-charge, over-discharge, over-current, short-circuit, and over-temperature conditions. I will thoroughly verify the design so your prototype meets the required protection limits and achieves cell balancing within ±10 mV. I am committed to delivering high-quality work on time and would appreciate the opportunity to work on your project.

@abhinavv370

Hi, Your project is exactly the kind of hardware design I enjoy working on. I can design a compact, production-ready 4S (16.8V) Li-ion BMS with all the required protections: over-charge, over-discharge, over-current, short-circuit, thermal shutdown, and accurate cell balancing. You'll receive: • Schematic (KiCad/Altium/EasyEDA) • PCB layout with manufacturing-ready Gerbers • Annotated BOM with footprints and sourcing links • Design notes covering protection thresholds, balancing method, and thermistor placement • Firmware, HEX file, and flashing guide if an MCU is used For maximum reliability, I'd recommend a dedicated BMS IC unless your application requires programmable logic. I'll also ensure the design is optimized for safe operation, clean PCB layout, and easy manufacturing. Before we begin, I'd love to know: * What are the required continuous and peak charge/discharge currents? * Do you already have preferred connectors or a battery pack layout? I'm happy to support prototype testing and revisions until the board performs as expected. Looking forward to discussing your project!

@ostronik

Hi Greetings from OSTronik India! We are a technology-driven company specializing in Power Electronics and Embedded System Design integrated with Artificial Intelligence (AI), delivering reliable, industrial-grade Electronic Solutions—from concept to mass production, all under one roof. Our in-house capabilities include R&D, Firmware Development (C & Python Programming), Hardware Design, Prototyping, and Scalable Mass Production with a focus on quality and cost efficiency. Core Expertise: • Microcontroller : PIC, STM32, ESP Family, AVR, Nuvoton, XBee. • Microprocessors: Raspberry Pi • Development Tools: MPLAB X IDE, Keil, STM32CubeIDE, Arduino IDE, Atmel Studio, VS Code. • Hardware Design: Industrial-grade multilayer PCBs using Altium Designer, KiCad, with efficient power design, isolation handling, and EMI/EMC compliance. • Communication Protocols: UART, SPI, I²C, CAN, Modbus, MQTT, LAN, S-Bus, RS-485, RS-232. • RF Modules: LoRa, nRF Series, XBee, Laird RF Modules. Project Capabilities: Power Monitoring & Energy Management Units, CNC Controllers, BLDC/DC Motor Control, IoT-based Agriculture, Smart Home & Industrial Automation, Inverters, Stabilizers, and Gimbal-based Videography Control Systems. We have already transformed the concept into a successful Electronic solution for multiple clients. To help you better visualise our expertise, we would be glad to share a brief reference video. Let’s schedule a meeting to discuss further. Best Regards, Team OSTronik India

@onaolapohammed01

Hello, I would be pleased to design your 4S (16.8V) Li-ion Battery Management System with a strong focus on safety, reliability, and manufacturability. My experience in power electronics, battery charging systems, embedded design, and PCB development enables me to deliver a compact BMS that meets industry standards for 18650 cells. The design will include over-charge, over-discharge, over-current, short-circuit, thermal protection, and accurate cell balancing. I can implement either a proven dedicated BMS IC or an MCU-based solution, depending on your requirements. If firmware is used, you will receive clean, well-commented source code, the HEX file, and programming instructions. If a dedicated IC is selected, I'll provide the configuration worksheet or register settings. Deliverables will include the complete schematic, PCB layout, fabrication-ready Gerbers, an annotated BOM with verified footprints and sourcing information, and a design note explaining protection thresholds, balancing strategy, thermistor placement, and system operation. I will optimize the layout for current handling, thermal performance, and reliable manufacturing while ensuring it meets your testing criteria. I look forward to discussing your specifications and delivering a production-ready BMS.

@Sourav9083

Dear Sir/Madam, I hope this email finds you well. My name is Sourav Ghosh, and I am the founder of GCORE. We specialize in designing and developing innovative electronic solutions, including custom PCB design, embedded systems, IoT devices, firmware development, and rapid prototyping. Our services include: * Custom PCB design and development * Embedded hardware and firmware development * IoT product design and implementation * Industrial automation electronics * Electronic product prototyping and testing * Circuit redesign, troubleshooting, and optimization * Electronics consulting and technical support We are committed to delivering reliable, cost-effective, and high-quality engineering solutions tailored to your business needs. Whether you require a prototype, product development, or support for an existing electronic system, we would be delighted to collaborate with your team. If your organization has any current or upcoming electronics or automation projects, we would appreciate the opportunity to discuss how GCORE can support your goals. Please let us know a convenient time for a brief meeting or call. We would also be happy to share our portfolio and discuss your project requirements in detail. Thank you for your time and consideration. We look forward to the opportunity to work with you. Kind regards, Sourav Ghosh Founder & Electronics Design Engineer GCORE

@poojitham18

Hi i have more than12 years experienced in circuit designed and development in my past i have deosgned lot pcb for companies i can designed best way under emimec

@jaxr7

I can design a compact and reliable 4-cell Li-ion BMS that prioritizes safety, accurate protection thresholds, and practical manufacturability. I have experience developing embedded power electronics, battery-related circuits, PCB layouts, and MCU-based control systems. I can handle the complete design process including schematic creation, component selection, PCB routing, BOM preparation, and prototype validation support. For your 4S 16.8V battery pack, I will implement proper over-charge, over-discharge, over-current, short-circuit, thermal protection, and cell balancing functions based on proven Li-ion safety requirements. I can use a dedicated BMS IC with the required configuration documentation or an MCU-based approach with clean firmware if additional flexibility is needed. I will provide complete Altium/KiCad/EasyEDA files, fabrication-ready Gerbers, annotated BOM with footprints, design notes covering protection timing, balancing strategy, and thermistor placement. The PCB will be optimized for the 180x65mm target size and reliable assembly. My focus is delivering a safe, testable BMS prototype that meets voltage, current, temperature, and cell-balancing requirements on the first revision.

@paulpham93

I will design your 4S 16.8V BMS circuit, including overcurrent, overvoltage, thermal protection, and fuel gauge integration. I have successfully designed multiple battery management systems and can provide schematic, PCB layout, and components sourcing support. Looking forward to engineering this for you. Paul.