Custom BMS & Battery Charger Development in Taiwan

Custom BMS and battery charger development for Li-ion and LiPo battery systems, from hardware and firmware development to prototype PCB assembly and production.

Have a BMS or Battery Charger Project?

Send us your battery specifications, voltage, charge / discharge current, communication requirements, and expected quantity for an initial engineering review.

A complete design package is not required to start.

BMS: Battery Cell • Series (S) • Capacity • Voltage • Charge / Discharge Current • Protection • Communication

Battery Charger: Battery Pack • Voltage • Capacity • Charging Current • Input Voltage / Power • Communication

Existing Design: Schematic • PCB Design • BOM • Battery Datasheet • Communication Protocol • Prototype

Email: sales@leaderelec.com.tw

NDA available upon request.

Example BMS & Battery Charger Project

Application: UAV / Drone
Battery: 12S Li-ion, 20 Ah
Maximum Battery Voltage: 50.4 V
Required Charging Current: 20 A
Maximum Discharge Current: 60 A
Charger Input: 100–240 VAC
Communication: CAN Bus
Prototype Quantity: 5 pcs
Estimated Production Quantity: 500 pcs / year

Representative BMS & Battery Charger Projects

Examples of custom BMS and battery charger development.

Specifications vary according to project requirements.

Custom BMS Development

We develop custom Battery Management Systems (BMS) for Li-ion and LiPo battery packs.

We define the BMS architecture based on the battery pack, current requirements, protection requirements, communication interface, and actual operating conditions.

BMS Engineering Scope

Hardware Circuit Design
PCB Layout
Firmware Development
Cell Voltage Monitoring
Over Voltage Protection (OVP)
Under Voltage Protection (UVP)
Over Current Protection (OCP)
Short Circuit Protection (SCP)
Over / Under Temperature Protection
Cell Balancing
Battery Status Monitoring
SOC Estimation / Fuel Gauging, when required
Battery Pack Communication
MCU-Based Control
Prototype Development
Functional Testing
PCBA Manufacturing

BMS Design Requirements

BMS design is based on the actual battery and system requirements, including:

Battery Configuration / Number of Cells in Series (S)
Battery Cell Specification
Battery Capacity (Ah)
Nominal / Maximum / Minimum Battery Voltage
Maximum Charging Current
Maximum Discharging Current
Operating Temperature & Environmental Conditions
Protection Requirements
Communication Requirements

Protection thresholds and control logic are evaluated according to the battery cells, pack configuration, current requirements, and operating conditions.

BMS Communication & Control

For BMS projects requiring communication with a battery charger, main controller, flight controller, or other equipment, communication and control functions can be integrated according to the system requirements.

Depending on the project, interfaces and protocols may include:

CAN Bus
DroneCAN
UART
I²C
SMBus
RS-485
Customer-Specified Protocols

MCU-based control and firmware can be developed as part of the BMS project when required.

If an existing communication protocol is already defined, customers can provide the protocol documentation for engineering review.

For UAV and drone applications, communication between the BMS, flight controller, and battery charger can be developed according to the required system architecture and communication protocol.

Custom Battery Charger Development

We develop custom battery chargers for Li-ion and LiPo battery systems.

The charger architecture is determined according to the battery pack, charging voltage and current, available input power, operating conditions, protection requirements, and communication requirements.

Charger Engineering Scope

Hardware Circuit Design
PCB Layout
Firmware
CC/CV Charging
Charging Voltage Control
Charging Current Control
Charging Status Monitoring
Protection Functions
MCU-Based Charging Control
CAN / DroneCAN Communication
UART / I²C Communication
BMS Communication
Prototype Development
Functional Testing
PCBA Manufacturing

Battery Charger Design Requirements

Battery Pack Voltage
Battery Capacity (Ah)
Required Charging Voltage
Required Charging Current
Charger Input Voltage
Available Input Power
Protection Requirements
Operating Temperature & Environmental Conditions
Communication Interface / Protocol

Charging voltage, charging current, protection conditions, and control logic are evaluated according to the actual battery and system requirements.

BMS & Battery Charger System Integration

When a product requires both a custom BMS and battery charger, we can review the complete battery charging system rather than treating the two boards as separate projects.

Typical System Architecture

Battery Pack + BMS ↔ Battery Charger / Main Controller

System-level engineering review can include:

Battery Pack Requirements
BMS Architecture
Charger Architecture
Charging Power Stage
Protection Requirements
MCU Control
Communication Interface / Protocol
Hardware Circuit Design
PCB Layout
Firmware
Functional Testing

For systems requiring communication between the BMS and charger, battery status, charging information, protection status, and control data can be exchanged according to the required protocol.

For applications such as UAVs, drones, robotics, AGVs, and other battery-powered equipment, communication with the main controller can also be included.

Existing BMS or Battery Charger Design?

You Do Not Need to Start from Zero

If you already have an existing BMS, battery charger, PCB design, or prototype, we can review the available information and determine the appropriate next step.

Depending on the project, engineering support may include:

Component Replacement
Circuit Modification
PCB Revision
Firmware Modification
Communication Changes
Prototype Validation
Functional Testing
Manufacturing Preparation

Existing Project Information

Any of the following information can be provided for an initial engineering review:

Existing Schematic
PCB Design Files
Gerber Files
BOM
Battery Datasheet
Existing BMS / Charger Specifications
Communication Protocol
Prototype Information
Known Design Issues
Required Modifications

A complete design package is not required to start an initial engineering review.

After design validation, BMS and battery charger projects can transition from prototype builds to PCB assembly and production through our Taiwan manufacturing facility.

From BMS Development to Production

A BMS or battery charger project can continue from initial engineering development through prototype validation and production.

Requirements Review

↓

Hardware Design

↓

PCB Layout

↓

Firmware Development

↓

Prototype Build

↓

Functional Testing

↓

NPI / Pilot Run

↓

PCBA Manufacturing

↓

Volume Production

This allows customers to move from BMS design or battery charger development to prototype and production without transferring the project to a separate PCBA manufacturing supplier.

BMS Prototype & PCBA Manufacturing

After the BMS or battery charger design is ready for prototype validation, the project can continue directly into PCB and PCBA manufacturing in Taiwan.

Manufacturing Support

PCB Fabrication
Component Sourcing
Prototype PCB Assembly
SMT Assembly
THT / Through-Hole Assembly
Firmware Programming
Functional Testing
NPI / Pilot Production
Volume Manufacturing

This provides a direct path from engineering development → BMS prototype → PCBA → NPI → production.

For early-stage engineering validation and small-volume builds, we also support Prototype PCB Assembly for custom BMS, battery charger, control board, and power electronics projects.

After design validation, BMS and battery charger projects can transition from prototype builds to production through our Taiwan PCB Assembly manufacturing services.

From PCBA to Complete Product Integration

For projects requiring more than PCB assembly, we can also support integration of the PCBA into the final BMS, battery charger, or electronic product.

Integration requirements may include:

Enclosure Integration
Cable & Wire Harness Assembly
Connector Assembly
Displays & User Interfaces
Power Supply Integration
Firmware Programming
Functional Testing
Final Mechanical Assembly
Final Inspection & Packaging

Projects requiring enclosure integration, cable assembly, connectors, displays, or final product integration can also be supported through our Box Build Assembly services.

This provides a coordinated manufacturing path from custom BMS or battery charger development through prototype PCB assembly, production manufacturing, testing, and final product integration.

Applications

Our custom BMS and battery charger development supports applications including:

UAV / Drone Systems
AGV / AMR Systems
Robotics
Industrial Battery-Powered Equipment
Automation Equipment
Portable Industrial Equipment
Other Custom Li-ion / LiPo Battery Systems

Each project is evaluated according to the actual battery specifications, electrical requirements, operating conditions, communication requirements, and expected production quantity.

What to Send Us for an Engineering Review

You do not need to prepare a complete specification before contacting us.

Send us whatever project information you currently have. We will review it and let you know if anything else is needed.

For a BMS Project

When available, please provide:

Battery Configuration / Series (S)
Battery Cell Specification / Datasheet
Battery Capacity (Ah)
Nominal / Maximum / Minimum Battery Voltage
Maximum Charging Current
Maximum Discharging Current
Protection Requirements
Required Communication Interface / Protocol
Product Application
Operating Conditions
Prototype Quantity
Estimated Production Quantity

For a Battery Charger Project

When available, please provide:

Battery Cell / Battery Pack Specification
Battery Pack Voltage
Battery Capacity (Ah)
Required Charging Voltage
Required Charging Current
Charger Input Voltage
Available Input Power
Protection Requirements
Required Communication Interface / Protocol
Product Application
Operating Conditions
Prototype Quantity
Estimated Production Quantity

If the charger needs to communicate with the BMS, flight controller, main controller, or other equipment, please also provide the available communication protocol or related technical documentation.

If you already have an existing design, send the available schematic, PCB files, BOM, specifications, prototype information, and required modifications instead.

Ready for an Engineering Review?

Send us your available project information. We can review the current requirements and confirm what additional information is needed before development or quotation.

BMS: Battery Cell • Series (S) • Capacity • Voltage • Charge / Discharge Current • Protection • Communication

Battery Charger: Battery Pack • Voltage • Capacity • Charging Current • Input Voltage / Power • Communication

Existing Project: Schematic • PCB Design • BOM • Battery Datasheet • Communication Protocol • Prototype

Email: sales@leaderelec.com.tw

NDA is available upon request before reviewing confidential project files.

Frequently Asked Questions

Do you develop custom BMS solutions?

Yes. We develop custom BMS solutions for Li-ion and LiPo battery systems according to the battery configuration, cell specifications, voltage, capacity, charge/discharge current, protection requirements, operating conditions, and communication requirements.

Do you develop custom battery chargers?

Yes. Battery chargers can be developed according to the battery pack voltage, capacity, charging requirements, available input power, protection requirements, operating conditions, and communication protocol.

Can you develop the hardware, PCB, and firmware?

Yes, for BMS and battery charger projects. Development can include hardware circuit design, PCB layout, firmware, communication functions, prototype development, and functional testing.

Can the BMS communicate with the battery charger or main controller?

Yes. Depending on the project requirements, communication can be implemented using CAN, DroneCAN, UART, I²C, SMBus, RS-485, or a customer-specified protocol.

Can you support UAV or drone battery systems?

Yes. BMS and battery charger systems for UAV and drone applications can include battery monitoring, protection, charging control, and communication between the BMS, charger, and flight controller according to the required system architecture and protocol.

Can you modify an existing BMS or battery charger design?

Yes. If you already have an existing schematic, PCB design, prototype, or product, send us the available information and required modifications for engineering review.

Can you manufacture the BMS or charger after development?

Yes. After prototype validation, we can support PCB fabrication, component sourcing, PCBA manufacturing, functional testing, NPI / pilot production, and volume manufacturing.

Can we send preliminary specifications before the design is complete?

Yes. A battery datasheet, preliminary specification, block diagram, existing schematic, PCB design, or prototype can be used for an initial engineering review.

Can you sign an NDA before we send our design files?

Yes. NDA is available upon request before engineering discussions or review of confidential project information.

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