After years of continuous development, the electrification of automobiles has achieved remarkable results. However, how to improve the endurance of electric vehicles is still one of the most important technical problems at present, and the innovation of the battery management system is the core of the breakthrough. Today, Texas Instruments (TI) announced a major development in the field of battery management systems (BMS) for electric vehicles (EV), the release of the industry’s leading wireless BMS solution, which is the first independently evaluated functional safety concept. By adopting a wireless protocol with industry-leading network availability, TI’s wireless BMS solution demonstrates how to help vehicle designers reduce heavy, expensive and frequently maintained wiring, and improve the reliability and efficiency of electric vehicles on a global scale .
TIWireless BMSThe solution enables automakers to reduce the complexity of their designs, improve reliability, and reduce vehicle weight, thereby extending mileage. Thanks to the flexibility to adjust the design across production models, automakers can transition to the production stage faster through TI’s comprehensive wireless BMS products. Such wireless BMS products include: SimpleLink™ 2.4GHz CC2662R-Q1Wireless microcontroller (MCU) evaluation module, software and functional safety drive tools (such as safety manual; failure mode and impact analysis FMEA; failure mode impact and diagnostic analysis FMEDA; TÜV SÜD concept report, etc.). For more information, see the blog post"Electric cars in the future will have longer driving ranges and fewer wires".
"The application of wireless battery management systems will be a growing trend in the electric vehicle market, because this type of development provides greater design flexibility and reduces complexity and cost compared to traditional systems." Strategy Analytics' powertrain Said Asif Anwar, head of assembly, body, chassis and safety services. "TI demonstrated a solution that combines these advantages with ASIL D compliance, setting a standard that the industry can follow."
meets theISO 26262ofASIL DRequirements
In order to reduce development time for automakers, TI has requested leading functional safety authoritiesTÜV SÜDIndependent feasibility assessment for the following aspects: the quantitative and qualitative error detection performance of the TI wireless BMS functional safety concept, the automobile manufacturer's compliance with the automotive safety integrity level ASIL D certification, and the higher level of the International Organization for Standardization (ISO) 26262 certification .
TI’s wireless BMS functional security concept uses a new wireless protocol developed specifically for wireless BMS use cases to solve communication error detection and security issues. With the help of the proprietary protocol implemented by CC2662R-Q1 wireless MCU, the host system processor can communicate with the newly releasedBQ79616-Q1Stable, reliable and scalable data exchange between battery monitor and balancer.
Securely achieve industry-leading network availability
Compared with wired connections, TI uses the CC2662R-Q1 wireless MCU to implement the wireless protocol of the battery management system, which can provide the industry's excellent network availability (over 99.999%) and 300ms network restart greater availability. The wireless MCU can provide dedicated time slots with high throughput and low latency to prevent data loss or damage, while enabling multiple battery cells to send voltage and temperature data to the main MCU with an accuracy of ±2mV, and the network data packet error rate is less than 10-7. Automakers can use the security drive tools provided by TI to reduce potential threats, such as: key exchange and refresh; unique device authentication; debugging security; software IP protection based on the Joint Test Action Group (JTAG) protocol; advanced encryption standards (AES) 128-bit encryption acceleration and message integrity check.
Reliable expansion and system-level design on multiple platforms
Taking into account the long-term design requirements of automakers, TI’s wireless BMS innovative technology has higher scalability in the industry.Deterministic protocols can provide higher throughput in the market, enabling automakers to use a single wireless system-on-chip battery module and battery module in different battery configurations (such as systems with 32, 48, and 60 battery cells, etc.)Multiple BQ79616-Q1 battery monitors are connected.The system design can support up to 100 nodes, each node achieves the industry's lower latency (less than 2ms), and the measurement of each node can achieve time synchronization.The CC2662R-Q1 wireless MCU is independent of each battery cell monitoring device and no longer requires daisy chain isolation components, thus reducing the corresponding cost.The BQ79616-Q1 battery monitor and balancer provide different channel options in the same package type, at the same time provide pin-to-pin compatibility, and support the complete reuse of existing software and hardware on any platform.
###