On the crisscross highways around the world, a change is taking place – cars that have used fossil fuels for a century are turning into clean and efficient electric vehicles (EV). In the next decade, the EV market is expected to grow tenfold. In order to power millions of electric vehicles, the demand for monitoring, managing and maintaining high-performance batteries will also grow day by day.

The driving force of today’s battery market is not only cost, but also the demand for vehicles with longer mileage, shorter charging time and higher functional safety. In order to meet these stringent battery management system requirements, the highest standards must be observed and deviations must be minimized.

Since 40% of the price of electric vehicles depends on the battery, performance and battery life have become the main factors for the success of EV brand. As a leader in battery management system (BMS), ADI works with customers to find the best key processes to monitor and manage electric vehicle batteries and ensure their safety, productivity and service life.

overview

company

After ADI acquired linglilte, ADI’s product line includes the first integrated high-voltage battery stack monitor launched in 2008. Since then, we have been committed to providing the highest performance solutions. Today, we are developing the 5th generation products.

Challenge

The growth of EV market increasingly requires battery manufacturers, supply chains and automobile brands to provide high-quality and reliable battery technology to meet the demand.

application

Battery monitoring and management.

Concerns

OEMs are very concerned about the safety, cost, efficiency and service life of batteries.

target

Improve BMS to ensure safety, improve reliability, enhance performance and prolong the service life of EV battery.

Invest in better battery management systems

BMS can closely monitor, control and distribute the reliable charging and discharging of the whole battery system during its service life. Accurate monitoring of current and voltage distribution is essential because overcharging the battery can cause fire or explosion, while under charging (or complete discharge) can lead to battery failure. The quality of the battery management system directly affects the mileage that ev can drive each time it is charged. High quality battery management system can maximize the overall service life of the battery and reduce the cost of ownership.

In this case, the price level becomes less important, and long-term value becomes the key indicator. This is because you strive to achieve better performance throughout the life of the battery“ When it comes to accuracy and the accuracy within the whole service life of the vehicle, there is no trade-off, “said Mike kultgen, general manager of ADI BMS.” the higher the accuracy, the better we can understand the state of the battery unit, the more capacity we can obtain, and the more reliable the operation of the battery pack. ” Considering the investment of battery pack, the value of BMS performance is obvious, and this is more obvious as automobile designers consider warranty and life cycle cost of battery pack. 1.

Strict requirements for battery management

The battery puts great demands on the design team because they need to consider a series of priorities, including price, reliability and safety. You cannot take any risk when dealing with an EV system that provides 48 V to 800 v.

In order to provide more than 100 kilowatts of power at the moment the driver presses the pedal, the battery system must work efficiently at hundreds of volts. However, lithium batteries can only provide a few volts. In order to obtain sufficient power, a large number of batteries need to be connected in series to form a long battery stack. Typically, electric vehicles may use 100 separate batteries to provide 350 volts at the top of the battery stack. But this poses some challenges.

In a long battery stack, if one battery fails, actually all batteries fail. Therefore, you need to monitor and manage all batteries – charging and discharging the batteries, and every day of the vehicle’s life cycle. Lithium batteries cannot work under extreme charge and discharge conditions, but must be kept within a very specific range, such as 15% to 85%, otherwise the battery performance will decline.

Monitor and manage power

ADI’s BMS can provide accurate battery measurement information throughout the cycle from battery pack production to scrap. The electronic device is directly connected to each battery in the battery stack and reports the voltage and temperature corresponding to the battery current. The system can provide state of charge and state of health. The current and temperature of each battery must be monitored by the complex algorithm of the central processing unit. ADI has built-in powerful communication interface and supports modular design (Architecture). It is fully scalable and suitable for our different customer groups.

“BMS continuously monitors the battery and can provide reliable measurement accuracy at any time under various temperatures and working conditions. The system knows the situation all the time and depends 100% on the information it receives from the ADI chip. “

Mike kultgen – General Manager, ADI BMS

Key values: accuracy, reliability and stability

The benefits of working closely with ADI battery management system experts are not limited to access to a wide variety of components and products. They provide OEMs with our system level expertise, deep domain knowledge and many years of practical BMS design experience. OEMs can improve mileage efficiency per charge, extend battery life, ensure safety and improve brand trust.

Patrick Morgan, vice president of ADI autg, said, “customers tell us that they need to trust our products before they use our products. Therefore, we hold a technology summit in their site or our factory, and invite our key designers and application engineers to meet with their team. We spent a day or two introducing our development plan, understanding the problems they need to solve, and then discussing how we will solve their specific problems. We build trust by focusing on cooperation. “

Solve problems and find solutions

“A customer headquartered in Asia asked us to design a new battery management system around the old battery management system,” said Cuyler latoraca, application manager of ADI. “We studied their ideas, system requirements and operating environment. We found that their grounding scheme led to system measurement error, which is a common problem in the industry, and then we took measures to eliminate the error“

ADI high performance BMS provides power for super sports car

Rimac C_ Two high performance supercar has 1914 horsepower, 0-60 mph, acceleration time of 1.85 seconds and speed of 258 mph. This all electric super sports car shows rimac’s technical strength, adopts a battery pack composed of 6960 lithium manganese nickel batteries, and fully carries forward the true spirit of innovation and passion.

About 10 years ago, a 21-year-old inventor founded rimac mobili in a garage in Croatia. Now the company has developed into a technology giant with 600 employees. Rimac is committed to designing, developing and manufacturing electric supercars and high-performance electrification systems for global automobile companies.

With the high-precision BMS integrated circuit (IC) of ADI company, rimac electric vehicle can obtain electric energy and power from the battery as much as possible through high-precision measurement of the cell. The complex diagnosis technology enables the system to monitor the characteristics, voltage and temperature of the battery to determine the power state at any time. Patrick Morgan, vice president of automotive electrification and infotainment of ADI, said: “high accuracy will directly turn into fast charging time, maximum battery capacity and mileage.”

Mate rimac, chief executive officer of rimac, said: “rimac is a strong technical player in the field of high-performance electric vehicles. We develop and manufacture key electrification systems for many automobile companies around the world, and our own super sports car has set a higher benchmark for the performance of electric vehicles. The battery management system we use is a global application with extremely stringent requirements. It needs to achieve high precision, drastic changes in current and voltage in a very short time and rapid dynamic adjustment in the battery management control system. We decided to adopt ADI’s battery management IC product portfolio throughout the product line. We have conducted comparative tests on this kind of IC in the market, and the results confirm that ADI’s products can provide high-precision measurement and product reliability in the whole life cycle of the vehicle, so we chose them. “

have one’s eyes on the future

“High voltage battery system technology is changing with each passing day,” said Greg Zimmer, marketing manager of ADI BMS. We are under great pressure to increase capacity and prolong service life. How will the industry achieve this goal? While building a battery that can last for 10 years, how can we get more power from the battery pack, increase its range, support faster charging, and develop a centralized and modular design?

ADI not only focuses on the current problems faced by customers, but also focuses on the future and the process of continuous improvement. We will continue to introduce solutions that can maximize the mileage per charge, reduce the total weight and reduce the total cost of battery system, so as to lead the development of the industry. We have rich system level experience and a large series of components (there are 3 to 18 batteries in an integrated circuit, and the number of batteries supported is more than any other competitor), which makes us stand out from the competition.

We haven’t reached the peak of BMS yet

ADI works with OEMs to improve the way to solve and communicate power density, accuracy and weight challenges in the future through architecture innovation. We will continue to innovate, and our 5th generation BMS is expected to be put into vehicle production next year.

BMS: ADI advantage

ADI is in a leading position in the field of battery management system to meet the growing demand for safe, high-quality and high-performance batteries in the EV market. With rich system level experience and diversified component products, our partnership will benefit customers a lot.

·Industry leading precision and stability

·ASIL D is fully supported through a single component and simplified design

·High speed, reliable EMI, electrical isolation, redundant low-cost daisy chain, which can deal with fault conditions

·The product installation foundation is strong, and four generations of products have been put into on-site use

·Provide system level solutions through a range of BMS products

Impact on industry, environment and global health

There is a common misunderstanding among ordinary consumers that the performance of electric vehicles is not high and can not compare with that of fuel vehicles. ADI and rimac worked together to clarify this misunderstanding and began to help redefine the goals that high-performance electric vehicles can achieve. RIMAC C_ With ADI’s high-performance BMS, two high-performance super sports car has amazing 1914 horsepower, 0-60 mph acceleration time of 1.85 seconds and speed of 258 mph.

ADI and rimac not only set an example for the high-performance technology community, but also helped stimulate consumers’ enthusiasm and improve the user adoption rate of high-performance electric vehicles and overall electric vehicles.

According to the statistics of the World Health Organization, air pollution is a silent killer, killing 4.2 million people every year and shortening human life by 1.8 years. By working with rimac and other electric vehicle suppliers, ADI is removing obstacles and creating a cleaner and more sustainable environment by reducing carbon emissions.

ADI has been committed to creating a more environmentally friendly environment and improving people’s health around the world. In 2019, ADI’s BMS products prevented 60 million tons of carbon dioxide from entering the atmosphere and continued to reduce carbon dioxide vehicle emissions by 30% year by year. 60 million tons of carbon dioxide is equivalent to about 70 million hectares of mature forest.

1 while producing a large number of battery packs, it will also produce a large number of waste battery packs for recycling. As long as the battery is properly managed throughout its life cycle, depletion does not mean scrapping. When considering the total cost of ownership, the reuse of energy storage devices for purposes other than vehicles (also known as second life) must be taken into account.

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