High-Capacity Fast-Charging Power Bank

@macroenergy

As an experienced electrical engineer and circuit designer, I am confident in my ability to deliver a top-quality design package for your high-capacity fast-charging power bank project. My expertise in Power Electronics and Analog design will play a crucial role in designing a power bank that not only meets but exceeds your non-negotiable requirements of high capacity and true fast-charging performance. I am intimately familiar with Texas Instruments chips and can guarantee their seamless integration into your project. Moreover, my strong background in Euro-American certifications including UN 38.3, CE, FCC ensures that safety measures are prioritized in the design process. My substantial exposure to renewable energy projects will be greatly advantageous for your power bank design. Having successfully completed several PCB designs and layouts using Altium and created several embedded systems using platforms including STM32, ESP32, PIC18 among others, I believe I have the software-development capacity you may require for your project post-hardware integration. In addition to my technical skills and software proficiency, my level of commitment to project excellence and my sheer determination to deliver beyond expectation is unmatched. Choose me for meticulous attention to details, thorough adherence to deadlines, valued professional input at every stage of proyectoatters

@cpp2048

I can assist in design of this product. Power domain is one of my interests I always like to work on. I can also assist in beta testing of the product as well as generate detailed report on the performance. I have tools for testing such product. I do have lot of firmware development experience on ESP32 (IDF/RTOS based) and my design tool is KiCad. We can discuss in details when contacted. Thank you

@markoa7

Your High-Capacity Fast-Charging Power Bank with 1 USB-A and 2 USB-C ports and 100W output caught my eye. I’ve built TI-based 100W power banks with PD, including complete schematics, PCB layouts, BOMs, safety compliance, Portfolio: https://www.freelancer.com/u/markoa7 - Define cell config and protection using TI controllers to hit 100W while keeping BOM reasonable. - Deliver schematic, PCB (Gerber), BOM, and thermal/safety analysis; include runtime estimates for a typical 4,000 mAh device. - Integrate LilyGo ESP32-S3 monitoring and a dev-friendly interface. Scope: preferred cell chemistry and count, and any targets beyond UN 38.3, CE, FCC Could you confirm the target cell count and chemistry (e.g., 4S Li-ion or LiPo) and any additional certifications beyond UN 38.3, CE, FCC to prioritize in the design? Happy to hop on a quick call to discuss. Marko Aleksic

@mairajali11

With over 8 years of PCB design experience and a specialization in Eagle, Altium, KiCAD, and EasyEDA, I have honed my skills to perfection in developing high-quality circuit boards. I am comfortable using Texas Instruments chips, and can certainly accommodate your request for1 USB-A and 2 USB-C output ports with 100W power output capacity. My expertise extends to thermal considerations and integrating safety certifications such as UN 38.3, CE, FCC into the board- two vitally important aspects for a product like yours. The fact that you plan to connect the board to an Lilygo ESP32-S3 dev board for monitoring won't pose any problem either; being an Electrical/Electronics Engineer, this is well within my domain. Additionally, apart from the actual design process, I can also develop the software if necessary. It’s not just about delivering the product; it’s about delivering peace of mind along with it. During my career, I’ve learnt that attention to detail is not merely technical – it also implies understanding your branding and design objectives. This perspective enabled me rank among the top 1% of Preferred Freelancers. This adherence to quality will also be pertinent while creating an estimated runtime chart for a typical 4 000 mAh phone – I assure nothing but excellence. In summary, my adaptability, expertise, and commitment sets me apart from other freelancers in this field.

@edi45

Hi, i am embedded system engineer with 11 years of experience, i dont have previous project building power bank, but i design multiple BMS and DC DC that might be a help during this development and of course i can help with firmware development on separate project, so let me know if you are interested

@tshibsamuel477

Hi there, I carefully reviewed your power-bank requirements, including high-capacity operation, 5–20 V fast charging, dual bidirectional USB-C ports, USB-A output, up to 100 W power delivery, TI-based power electronics, and monitoring through a LilyGO ESP32-S3 board. I am a mechatronics engineer with almost half a decade of experience in electronics design, SMPS and LDO power supplies, embedded systems, USB interfaces, multilayer PCB layout, hardware prototyping, and power-management circuitry using Altium Designer. This background is directly relevant to the DC-DC conversion, battery protection, USB power paths, thermal design, monitoring interfaces, and manufacturable PCB required for this project. Because power electronics, embedded hardware, USB interfacing, and PCB design are already part of my core skillset, I can approach the architecture efficiently while keeping component availability, efficiency, thermal performance, safety, and BOM cost in focus. Please send me a message so we can discuss the project and start. Best regards, Samuel tshibangu

@engrusmanfaiz

Hi, I understand you need a high-capacity power bank with true 100W USB-C PD output and efficient 5–20V power conversion. I can design the complete hardware around reliable, readily available Texas Instruments ICs and keep the BOM practical. The design will include 2 bidirectional USB-C ports, 1 USB-A output, battery management, protection, and required headers/connectors. I will properly handle USB-C PD negotiation, QC compatibility, power-path management, current limiting, and thermal protection. I can also integrate the LilyGO ESP32-S3 for battery, voltage, current, temperature, and power monitoring. PCB layout will be optimized for high-current paths, switching noise, thermal dissipation, and reliable 100W operation. I will select components with availability and cost in mind and provide suitable alternatives where possible. I will prepare the complete schematic, PCB layout, Gerbers, BOM, and manufacturing-ready design files. I can also develop the ESP32-S3 monitoring firmware/software if required as part of the project. I will include thermal considerations, battery safety requirements, and design guidance relevant to UN 38.3, CE, and FCC testing. I have 10+ years of experience in power electronics, USB-C/PD, PCB design, ESP32, and battery-powered products. Share your target battery configuration and preferred cell capacity, and I can start by defining the power architecture.

@SPARKtechBD

Since 2003 I am working in Digital Electronic. So more than 18 years of experience in Electronics. Arduino NANO/UNO/MEGA, ESP32 and Raspberry PI to build a digital device to read sensor data and send it to the web server, motor control, control relay switches and LEDs. More than 5(five) years of experience in Arduino design and build. If you want an excellent and error-free project delivery, then send a message to me, please. Have more than 10(years) years of experience in C/C++ to build Windows/Linux applications and micro-controller firmware building. If you want a good job delivery, then send a message to me, please. Since 1995 I have been working on Analog and Digital Electronics to build any kind of device. I have build lots of devices. So more than 20 years of experience on Electronics. Including power supply design. Any kinds of schematic and PCB design. Expert PCB design in EasyEDA Pro IDE.

@Adeel2k14

Hi, I can design your complete high-capacity USB power bank using readily available Texas Instruments ICs, supporting 1× USB-A and 2× bidirectional USB-C ports with up to 100W USB-C PD output. I have 8+ years of experience in power electronics, battery management, USB-C, and multilayer PCB design. I’ll handle schematic, PCB layout, thermal management, BOM, Gerbers, connectors, and safety considerations for UN 38.3, CE, and FCC. I can also interface the design with your LilyGO ESP32-S3 for monitoring and develop firmware if required. I’m available to start immediately.

@kkirandeep582

As an experienced creative designer, prototyper and developer, I am ready to create the high-capacity fast-charging power bank you desire. My extensive knowledge in dealing with electronics and development projects make me a perfect fit for this job. I am proficient with Texas Instruments chips, which will ensure the use of quality and readily available components for your project. Ensuring safety is a top priority; I can guarantee the incorporation of safety certifications (UN 38.3, CE, FCC) as per your requirements. Additionally, my experience with thermal considerations will guarantee effective heat management during charging. Having previously worked on projects that required the optimization of 5V-20V ranges, I acknowledge the significance of preserving overall capacity and minimising BOM costs while offering compatibility with USB-C Power Delivery and Qualcomm QC. My expertise in developing software will also allow me to develop or work with your chosen code stacks efficiently. Furthermore, I will provide an estimated runtime chart for typical 4,000mAh phones using your power bank to keep you informed about its capabilities. Choose me for a professionally executed project that matches your needs perfectly while involving constant communication and attention to detail. The end result will be a powerbank solution that meets all your objectives - efficient, high-capacity\xa0and true fast-charging performance!

@yaroslavmark

Hi, I’m a senior electronics engineer with over 10 years of experience in power electronics, multi-layer PCB design, and embedded firmware development, having delivered designs involving DC-DC converters, battery management, USB interfaces, and microcontroller-based monitoring. My focus is on power efficiency, thermal reliability, component availability, and manufacturing-ready hardware. My approach: ✅ I will define the battery architecture, cell configuration, capacity, and power budget for 100W USB-C PD operation. ✅ I will design the power stages using suitable TI battery-management, buck-boost, and USB-C PD controller ICs, including protection, current sensing, and thermal management. ✅ I will develop the schematic and optimized PCB layout, including USB-A/QC, dual bidirectional USB-C, ESP32-S3 monitoring headers, and production-ready BOM/Gerbers. ✅ I will evaluate charging efficiency, thermal performance, runtime for a 4,000 mAh smartphone, and applicable UN 38.3, CE, and FCC compliance requirements. Questions: ✅ What battery chemistry, cell format, and target capacity (Wh or mAh) do you prefer? ✅ Should the 100W USB-C output be available from a single port, or shared across multiple ports? ✅ Do you require simultaneous charging and discharging, with USB-C PD input power specified? ✅ Do you have a preferred enclosure size or maximum BOM cost? Best, Yaroslav

@tetianam8

Hi, I’ve reviewed your requirements. I can design the complete power-bank electronics around TI components, with the main focus on efficient 5–20 V conversion, USB-C PD, 100 W output capability, battery safety and thermal performance. I can handle: • Battery/power-path architecture and protection • 1× USB-A + 2× bidirectional USB-C • USB-C PD and QC where practical • TI IC selection with available, cost-effective components • ESP32-S3 monitoring interfaces and headers • Schematic and PCB layout • BOM and Gerber production files • Thermal/power-loss analysis and runtime estimation For the 100 W output, I’ll pay particular attention to MOSFETs, inductors, connector ratings, copper paths and thermal management so the design remains practical rather than just meeting the electrical specification. Please confirm the planned battery chemistry/cell configuration, total capacity and desired maximum charging input power. This will allow me to define the power architecture correctly from the beginning. I can also support the ESP32-S3 monitoring firmware if required.

@Mahmoud00Ibrahim

Hello, I can design the complete power bank around readily available TI ICs, optimized for high capacity and efficient 100W fast charging. Scope: * 2× USB-C bidirectional ports, up to 100W USB-C PD * 1× USB-A fast-charge output * High-efficiency 5–20V power conversion * Battery charging, protection, monitoring and thermal management * Headers/interfaces for LilyGO ESP32-S3 monitoring * Complete schematic, PCB layout, Gerbers, BOM and manufacturing files * Realistic 4,000mAh phone charge/runtime calculations * Software/ESP32-S3 firmware support if required I’ll select readily available components and keep the BOM practical while considering UN 38.3, CE and FCC requirements. I can handle the project from architecture through production-ready PCB.

@hayat38402

Hi, how are you doing? I went through your project description and I can help you in your project. your project requirements perfectly match my expertise. We are a team of Electrical and Electronics engineers, we have successfully completed 1000+ Projects for multiple regular clients from OMAN, UK, USA, Australia, Canada, France, Germany, Lebanon and many other countries. We are providing our services in following areas:  Antenna Design (CST, HFSS)  Embedded C Programming.  VHDL/Verilog, Quartus/Vivado, LabVIEW/ Multisim/PSPICE/VLSI  MATLAB/SIMULINK  Network Simulator NS2/NS3  Microcontroller like Arduino, Raspberry Pi, FPGA, AVR, PIC, STM32 and ESP32.  IDEs like Keil MDK V5, ATmel studio and MPLab XC8.  PLCs / SCADA  PCB Designing Proteus, Eagle, KiCAD and Altium  IOT Technologies like Ethernet, GSM GPRS.  HTTP Restful APIs connection for IOT Communications. Also, we have good command over report writing, I can show you many samples of our previous reports. Kindly consider us for your project and text me so that we can further discuss specifically about your project's main goals and requirements.

@shykhAbubakar

Hi, I am ready to develop a complete design package for your high-capacity fast-charging power bank, including Texas Instruments-based power electronics, USB-C PD and QC compatibility, bidirectional 100W output, ESP32-S3 monitoring headers, thermal considerations, and safety certifications, following UN 38.3, IEC 62368-1, USB PD, and QC standards for a safe, efficient, and production-ready design. Project Deliverables: • Schematic • PCB layout • BOM • Gerber files • Thermal considerations • Estimated runtime chart I have a few questions: • Q1: Could you share the target battery capacity, cell configuration, and any preferred TI chipset family so I can begin the design? • Q2: Do you have any preference for the USB-C PD controller, QC protocol, or thermal management approach? Over 8 years of experience in power electronics and battery management for portable power applications. Similar projects I have done: • High-Capacity Power Bank Design with USB-C PD QC Fast-Charging and TI Power ICs • Battery Management System Design with Thermal Analysis and UN 38.3 Safety Compliance Software I can use: Altium Designer/KiCad I am ready to start immediately upon receiving the target battery capacity and cell configuration. Thank You! Warm regards, Abubakar

@sakshis576

With my diverse set of skills and comprehensive background in electronics, PCB design and embedded systems, I am confident that I can successfully deliver a high-capacity fast-charging power bank that fits your specific requirements. I have experience working with various Texas Instrument chips as well as USB Power Delivery and Qualcomm QC compatibility, which aligns perfectly with your project needs. Moreover, safety and compliance are central to any electronic product, and I understand the importance of obtaining the required certifications such as UN 38.3, CE, and FCC for your power bank. I'll also consider thermal management and provide a detailed runtime chart for the 4,000 mAh phone you specified. Additionally, given your interest in using the Lilygo ESP32-S3 dev board, I can seamlessly integrate this into the design and even develop software if necessary. With my expertise, you can be assured of receiving a complete design package including schematics, PCB layout (Gerber + BOM) alongwith headers connectors. All in all, my technical proficiency combined with a thorough understanding of your project's goals guarantees a tailored design most suited for your needs - efficient at 5V–20V range while maintaining a true fast-charging performance at 100W power output across all 3 ports (1 USB-A and 2 USB-C bidirectional). Let"s work together on generating quality results that will exceed your expectations.

@maksymstel

Hello, I am a Full Stack Engineer and PCB Designer with 10 years of experience, providing power electronics, USB-C PD, battery management, fast-charging circuits, ESP32, and multilayer PCB design. In my opinion, I would build the power architecture around reliable Texas Instruments ICs, with efficient buck-boost conversion and proper USB-C PD power negotiation for up to 100W bidirectional operation. The design will include battery protection, thermal management, current monitoring, connectors for the LilyGO ESP32-S3, and a practical BOM using readily available components. This project is very similar to my previous works. I have experience designing battery-powered electronics, USB-C power systems, DC-DC converters, and compact power PCBs. I understand the importance of efficiency, thermal performance, protection, and production-ready documentation. The most important skill is power-path and USB-C PD design. I will carefully calculate voltage/current limits, losses, thermal margins, and charging/discharging conditions while keeping the BOM reasonable. Via private chatting or meeting, I will provide the creative idea and good tech solution for your project. Best regards. Maksym

@mahmoudralizadeh

Hi, Building a 100W bidirectional power bank is a great project, but getting the thermals and PD negotiation right is the real challenge. I think the best path here is using a reliable TI buck-boost topology (like the BQ25720) paired with a dedicated PD controller (TPS65987D). This setup is efficient, handles the 5V–20V profile seamlessly, and keeps your BOM costs manageable. For the ESP32-S3 integration, I’ll focus on clean I2C mapping so you get accurate real-time telemetry—fuel gauging, thermal stats, and VBUS status—without cluttering the main power path. I’ve handled plenty of board layouts where EMC and thermal dissipation were critical, so we’ll design the copper pours and thermal vias to make sure it passes UN 38.3 and CE/FCC without needing a redesign. I’ll provide the full schematic, 4-layer layout, sourced BOM, and the thermal analysis you need. Before we jump into the schematics, I’d like to clarify a couple of design directions: Are you planning on a 3S or 4S battery configuration? Also, how do you want the device to behave when multiple ports are loaded? Setting the priority logic (e.g., locking the 100W port vs. splitting power) is something we should define early on. Looking forward to hearing your thoughts.

@ahmedy607

Hi, I’ve read the project details carefully, and this is very close to the type of electronics and PCB projects I work on. I can help with the complete power bank hardware design, including the power management, USB-C/USB-A interfaces, fast-charging requirements, protection, thermal considerations, and integration with the LilyGo ESP32-S3 for monitoring. I’ll focus on using reliable and readily available components while keeping the design practical for manufacturing and within the target BOM cost. Please check my portfolio to see some of my previous ESP32 and related PCB projects. I am ready to start immediately. Best regards, Ahmed