How to successfully design an electric car battery management system?

2022/04/08

  Author :Iflowpower – Portable Power Station Supplier

Battery Management System (BMS) is the core of electric vehicles, the safety operation of the whole vehicle, the choice of vehicle control strategy, the choice of charging mode, and the operating costs have a big impact. Battery Management System Whether it is reliable to complete the real-time monitoring and troubleshooting of battery state during vehicle operation, it is informatively informing the vehicle integrated controller or charger through the bus to adopt a more reasonable control strategy. To achieve effective and efficient use of batteries.

A successful electric vehicle battery management system must have some basic features: perfect system function BMS has real-time monitoring, data resolution, fault decomposition, and power supply and discharge control, PC, data transfer, thermal management, charge and discharge control, PC Powerful features such as online monitoring, running data storage, data dump, and database management. In terms of test accuracy, high voltage testing, BMS adopts a floating voltage test structure and a dedicated dual integration ATD chip, which is fully considering the AC ripple influence of the power grid when charging, effectively handling the problem of common land, preventing accumulation errors, making the voltage The accuracy of the test reached 0.5%; the temperature test, in the guarantee temperature error±In the premise of 0.

5 ¡ã C, the scalability of the temperature sensor is also considering the scalability of the temperature sensor. In terms of current testing, the sensor and high-precision dedicated integrated chips are used, and the current test and energy accumulation are satisfied. Accuracy reaches 0.

5%. The interface is simply used for easy users, and the BMS simplifies the external output interface while ensuring the above functions. Only the external connection includes only power cords and communication lines.

All-standing auxiliary equipment to simplify the user's operation and strengthening the intuitiveness of the system, the battery management system designs portable fault diagnosis and data storage instruments, realizing the diagnosis and positioning of the fault, greatly strengthened the ability to handle battery failure on site. The humanized PC monitor interface BMS designed the corresponding PC monitor interface, enabling online monitoring, data dump, database management, and data decomposition and battery performance decomposition of BMS data. High security, reliability and stability systems use advanced technologies such as large-scale integrated circuits, filters, high-grade isolation, data redundancy, combine related experience in actual demonstration operation, to ensure system security, reliability and stability.

Engineering Design In order to meet the needs of vehicles, BMS uses waterproof and dustproof design, from components selection, chip direct sales manufacturers, sample detection, system high and low temperature circulation aging, circuit board detection, product factory inspection, on-site detection The aspects are strictly controlled and recorded mechanisms to ensure the quality, professional wiring and post-maintenance team of the product, and ensure the efficient operation of the vehicle.

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