Aiming at the starting line, NXP BMS system accelerates vehicle development

2024-03-04

In October 2020, Volkswagen and NXP collaborated on electronic components for electric vehicles (EVs), using NXP Battery Management System (BMS) for Volkswagen's innovative MEB platform to help optimize range, extend lifespan, and improve safety. It is expected that by 2029, Volkswagen will launch up to 75 all electric vehicle models to the market based on this platform.

In the past year, neither China's dual credit policy nor Europe's regulations on carbon dioxide emissions have been relaxed due to the impact of the pandemic. On October 27th of this year, the Chinese Society of Automotive Engineers released the "Roadmap 2.0 for Energy Conservation and New Energy Vehicle Technology", which clearly stated that energy-saving vehicles and new energy vehicles will become the main sales force by 2035, completing the electrification transformation of the domestic automotive industry. At the same time, many capable component suppliers are actively transitioning and upgrading towards electrification.

Many vehicle manufacturers encounter various challenges in accelerating the electrification process of vehicle models, such as battery cost reduction, range and energy supply, electrification of the entire fleet, and supply chain capabilities. As the core component of the power battery pack, the Battery Management System (BMS) plays a crucial role in electrification, connecting the battery pack, vehicle system, and motor. The safety performance and efficiency of batteries largely need to be improved through the BMS system.

Recently, Robert Li, Vice President and General Manager of Drive and Energy Systems Product Line at NXP Semiconductor In an interview about battery management, it was mentioned that NXP's BMS covers the entire system of battery management, such as ICE control units, inverters, powertrain controllers, etc. The reference designs provided have been validated, and the concept of functional safety and corresponding documents, data, etc. of these reference designs have been prepared in advance; NXP can provide a comprehensive solution, including a processor, in car network sensors, drivers, analog front-end, and battery management with active safety functions, rather than just providing one chip or a bunch of chips for users to combine. Optimize the entire system, reduce costs, improve performance, and accelerate time to market

As is well known, power batteries have hundreds or even thousands of cells, and according to the barrel effect, weak cells determine the limit of the entire battery's charge and discharge. Therefore, balancing multiple battery cells is extremely important as it can help improve the battery's lifespan and capacity. It is reported that NXP's products have very good simulation measurement accuracy, which is very important for improving the mileage of the whole vehicle and improving the safety of diagnosis, because the chip will produce accuracy drift during use. NXP's simulation measurement accuracy not only ensures the factory accuracy of the chip, but also ensures the accuracy of the product throughout its lifecycle. At present, many companies in the market adopt parity balancing, which means that only 1, 3, 5, 7 or 2, 4, 6, and 8 battery cells can be opened simultaneously for balancing. Enzipu can meet the requirement of balancing from 1 to 14 series simultaneously, and all of them have relatively high capacitance. This approach can provide customers with more flexibility and enable simultaneous diagnosis during balancing, thereby ensuring better security.

In addition to the advantages mentioned above, Mr. Li Xiaohe also added, "One of the major advantages of Enzhipu battery management is that it can be extended to all electric vehicle powertrains. Many car manufacturers not only produce 400V or 800V models, but also plug-in hybrid 14V and 48V models.". We have provided our customers with a comprehensive chipset, whether it is a 6-core or a 14-core. They are basically chipsets with similar architectures, and their data collection methods, communication methods, and system functional safety concepts are very similar on different car models. There are many documents and software and hardware designs that can be reused It is understood that NXP has a fairly complete customer support system in the market, whether it is authorized design support or after-sales quality support, which can ensure the electrification speed of the fleet.

According to industry insiders, the output value of BMS is estimated to be around 6 billion US dollars in 2019, and it is expected to exceed 12 billion US dollars by 2025. In 2019, China's production of new energy vehicles reached 1.242 million units, accounting for approximately 57% of the total, and the BMS market size was approximately 24 billion yuan.

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