The AC/DC Charger can be either external to the vehicle or embedded inside the vehicle. The charger is connected to the battery management system. The system ensures that the battery unit is properly charged until high voltage (HV) requirements are met. HV batteries are essential for driving traction motors during operation. It can also supply 12V to other automotive modules of the car via a converter. Depending on the charging mode (slow, medium or fast charging) and technology (wired or wireless), the solution may vary.
Target applications: chargers, converters, electric vehicles, hybrid vehicles
Solution :
Scheme block diagram
First, battery pack control
1. MPC560xB: Freescale 32-bit MCU for body electronics applications.
The Freescale MPC560xB/C/D Series 32-bit microcontrollers are the latest integrated devices for automotive body electronics applications. These scalable Power Architecture® devices also have a vast ecosystem of supporting ecosystems, including software drivers, operating systems and configuration code to help you get your design done quickly.
2, S12G: feature-rich 16-bit MCU for general-purpose automotive and industrial control applications
The MC9S12G is an optimized low-cost, high-performance, low pin count 16-bit MCU family for automotive applications. The MC9S12G series is suitable for general-purpose automotive applications that require CAN or LIN/SAE J2602 communication. The MC9S12G offers all the benefits and high performance of a 16-bit MCU while maintaining the low cost, low power consumption, superior EMC performance and code efficiency benefits of Freescale's existing 8- and 16-bit MCU families.
Second, 12V battery monitoring
1. MM912_637: Battery sensor for 12V lead-acid battery with LIN interface
The Freescale MM912_637 battery sensor is a fully integrated battery monitoring device. These devices measure battery current and voltage simultaneously to accurately measure SOC (state of charge), SOH (health), and other parameters. The integrated temperature sensor is designed to be close to the battery and can measure the temperature of the battery. Multiple hardware modules dedicated to specific applications reduce MCU overhead and associated power consumption. The low power mode can be set up with automatic battery status monitoring and advanced wake-up functions to further reduce power consumption. Integrated LIN 2.1 interface for communication and control of battery monitoring functions.
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