Solution Description
Battery Management Systems (BMS) improve the lifecycle, health, and safety of power storage systems in electric vehicles.
A BMS measures the current, voltage, and temperature of individual battery cells and sends that information for processing to a microcontroller. The MCU’s embedded software uses this data to determine the State of Charge (SOC) and State of Health (SOH) of each battery cell, ensuring efficient cell balancing and extending the battery’s lifespan for the best performance.
Main components of our BMS solution
This customizable solution describes a highly scalable battery management system from traditional low voltages up to 400, 800, and 1200 V batteries.
The L9963E Li-ion battery monitoring and balancing chip benefits from a unique architecture able to measure from 4 to 14 cells in series without any desynchronization delay.
A general-purpose SPI to isolated SPI transceiver, the L9963T creates a communication bridge between devices located into different voltage domains. Designed to support any protocol made of SPI frames 8 to 64 bits long, this very flexible device is able to transfer communication data coming from a classical 4-wire based SPI interface to a 2-wire isolated interface (and vice-versa). All the functions are managed by a dual-core SPC58EC80E5 automotive microcontroller.
Two possible BMS configurations
We can address two different configurations, the “centralized access” and the “dual access ring” versions.
In a centralized daisy chain configuration, the SPC58EC80E5 MCU is connected via SPI to the L9963T (low-voltage domain). The transceiver connects the MCU to the BMS chain (high-voltage domain, a harsh automotive environment where isolated SPI communications are required).
A dual access ring configuration is also possible by adding another transceiver for bidirectional communication. The secondary ring is used as a backup in the event that the primary ring fails.
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Key Product Benefits
SPC58EC80E5 - Automotive Microcontroller
Part of the SPC58 microcontroller series, the SPC58EC80E5 benefits from the comprehensive SPC5 development ecosystem.
L9963E - Battery Monitor
The L9963E is a Li-ion battery monitoring and balancing chip for high-reliability automotive applications and energy storage systems. Up to 14 stacked battery cells can be monitored to meet the requirements of 48 V and higher voltage systems.
L9963T- Isolated SPI tranceiver
The L9963T is a general-purpose SPI to isolated SPI transceiver intended to create a communication bridge between devices located into different voltage domains.
The L9963T is able to transfer communication data incoming from a classical 4-wire based SPI interface to a 2-wire isolated interface (and vice-versa).
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All Features
- Advanced functionality
- Safety features (temperature control)
- SOC and SOH
- High measure accuracy
- Performance benefits
- High reliability
- Extended driving range
- Longer battery lifetime
- Advanced functionality
