Eshine Tech Expands Its Battery Management System (BMS) Solutions for Lithium Battery Applications

Battery Management Systems have become an important electronic component in modern lithium battery packs. Beyond basic protection, a BMS needs to continuously monitor battery conditions, manage charging and discharging, estimate battery state and communicate operating information to the wider system.

To support these requirements, Eshine Tech has expanded its product portfolio with a Battery Management System platform for lithium battery applications. The new BMS offering complements Eshine Tech's existing electronic component and new energy product portfolio while providing customers with an additional option for battery pack development and system integration.

The BMS platform is designed around practical battery pack requirements, including cell configuration, current rating, protection parameters, communication interfaces and application-specific integration.

Supporting LFP and NMC Lithium Battery Packs

Different lithium battery chemistries require different voltage ranges, protection thresholds and management parameters. The current BMS platform supports both LiFePO4 (LFP) and NMC battery chemistries.

For LFP battery packs, the platform supports 5–24 series cells, while NMC battery packs are supported from 5–20 series cells. Standard current classes include 60A and 100A, providing options for different battery pack configurations.

This range allows the BMS to be applied across different battery pack designs rather than being limited to a single battery configuration.

For project-specific requirements, cell count, current rating, communication interface and other parameters can be evaluated according to the actual battery pack design.

Continuous Battery Monitoring

Accurate battery monitoring provides the data required for both protection and battery status management.

The BMS continuously measures key operating parameters including:

• Individual cell voltage
• Pack voltage
• Charge and discharge current
• MOS temperature
• External NTC temperature

Monitoring these parameters allows the system to identify abnormal operating conditions and provide battery status information to the connected vehicle, controller, display or other system interface.

For applications with frequent charging and discharging cycles, continuous monitoring is particularly important because battery conditions can change significantly depending on load, temperature and operating state.

Multi-Level Protection for Battery Pack Operation

Battery protection is one of the core functions of a BMS. Instead of relying on a single protection threshold, the platform uses multiple protection functions to respond to different abnormal conditions.

The current BMS platform supports protection against:

• Over-voltage
• Under-voltage
• Charge over-current
• Discharge over-current
• Short circuit
• Over-temperature and under-temperature conditions
• Excessive cell voltage difference
• Excessive temperature difference

Protection parameters can include delay and recovery logic according to the application configuration.

This approach helps the battery management system respond to abnormal electrical and thermal conditions while maintaining appropriate operating control during normal charging and discharging.

SOC and SOH for Better Battery Status Visibility

Battery voltage alone cannot fully describe the condition of a lithium battery. For practical battery applications, system operators and vehicle controllers also need information about the remaining battery capacity and battery health.

The BMS platform supports State of Charge (SOC) and State of Health (SOH) estimation. Coulomb counting combined with OCV correction is used to improve battery state estimation, while cycle count and operating-state information can also be recorded.

This information can be used by connected systems to display battery status, manage charging and discharging, support maintenance decisions and improve the visibility of battery operating conditions.

For fleet and shared-mobility applications, battery status information can also contribute to maintenance and battery lifecycle management.

Passive Balancing for Cell Consistency

Cell consistency is another important consideration in lithium battery pack management.

Differences between individual cells can gradually increase during repeated charging and discharging. If the voltage difference becomes excessive, the usable capacity and overall battery performance may be affected.

The BMS supports configurable passive balancing based on cell-voltage and voltage-difference thresholds. By managing cell consistency during charging, the BMS can help maintain a more balanced battery pack and support stable operation over repeated cycles.

Balancing parameters can be evaluated according to the battery chemistry and pack configuration rather than applying the same settings to every battery system.

Communication and System Integration

A BMS does not operate independently from the rest of the battery-powered system. In many applications, battery information needs to be exchanged with a vehicle controller, display, charging system, battery-swapping cabinet or IoT platform.

The BMS platform supports Bluetooth and UART, with CAN, RS485, IoT, display and single-wire options available according to project requirements.

This communication capability allows battery information such as SOC, alarms, operating status and charge/discharge conditions to be integrated into a larger control system.

For example, in battery-swapping applications, the BMS can provide battery status and fault information to support battery identification, charging coordination and event traceability through the swapping cabinet or connected IoT system.

BMS Applications in Electric Mobility

The current BMS platform is particularly suited to lithium battery packs used in light electric mobility and low-voltage power applications.

Typical applications include:

Two-wheel battery swapping and electric mobility

E-bikes, electric scooters and electric motorcycles require compact battery packs with reliable protection, status reporting and communication. BMS functions can support battery identification, charging management, fault monitoring and communication with battery-swapping systems.

Electric three-wheelers

Electric cargo tricycles, delivery tricycles and utility vehicles can experience frequent starts, load changes, gradients and demanding operating environments. Current and temperature protection, event logging and communication functions are therefore important considerations for these battery packs.

Low-speed electric vehicles

Golf carts, utility vehicles, tourist vehicles, patrol vehicles and other low-speed electric platforms may require communication between the battery, display and vehicle controller. CAN or RS485 can be configured according to the system architecture to provide battery status and alarm information.

These applications share a common requirement: the BMS must be selected according to the actual battery pack rather than treated as a one-size-fits-all electronic board.

Selecting a BMS According to the Battery Pack

BMS selection should begin with the battery and application requirements.

Important factors include:

• Battery chemistry
• Number of series cells
• Continuous and peak current
• Charge and discharge requirements
• Temperature monitoring requirements
• Communication interface
• Connector and wiring configuration
• Mechanical dimensions
• Protection parameters
• Application environment

A BMS with the correct electrical rating may still require further evaluation if its communication protocol, mechanical structure, wiring or protection settings do not match the complete battery system.

For this reason, Eshine Tech evaluates BMS requirements on a project basis and can recommend an appropriate configuration for sample evaluation.

From BMS Selection to Project Support

BMS projects often require more than product supply. Battery parameters, electrical requirements, communication interfaces and application conditions need to be reviewed before a suitable configuration can be confirmed.

Eshine Tech supports BMS projects through a structured process:

Requirement Confirmation → BMS Selection → Technical Review & Quotation → Sample Approval → Mass Production & Delivery

During the evaluation stage, customers can provide their battery and application requirements for review. The appropriate BMS configuration can then be recommended based on battery chemistry, cell count, current requirements, communication interface and other system conditions.

This project-oriented approach helps customers evaluate the BMS against the actual battery pack before moving to production.

Building a More Complete Battery Electronics Portfolio

The addition of BMS solutions extends Eshine Tech's capabilities in battery-related electronics and strengthens its support for new energy and electric mobility applications.

From battery management and monitoring to other electronic components used in battery-powered systems, different parts of the electrical architecture need to work together to achieve reliable operation.

With its BMS platform supporting LFP and NMC battery packs, multiple cell configurations, protection functions, battery state estimation, balancing and communication options, Eshine Tech can support customers looking for a suitable BMS configuration for their lithium battery projects.

For customers developing e-bikes, electric motorcycles, three-wheelers, low-speed electric vehicles, battery-swapping systems or other lithium battery applications, Eshine Tech can review the battery and system requirements and recommend an appropriate BMS solution for evaluation.