ADI has established long-term relationships with car manufacturers and first-tier component suppliers. Based on long-term successful cooperation with new energy vehicles and suppliers at home and abroad, ADI will also launch a new generation of lithium battery management solutions in the near future. According to the actual needs of customers, we define and design, fully support customers to complete excellent system design and meet reasonable cost targets.
In the past two years, many countries around the world have adjusted their development strategies, speeding up the layout of new energy and intelligent networked vehicles, and have initially set a timetable for the ban on production and sales of fuel vehicles, which are generally in the next 15 years. In the medium- and long-term plan issued by the Chinese government this year, it is indicated that the sales volume of new energy vehicles (NEVs) such as pure electric vehicles will increase from 500,000 units in 2016 to 7 million units in 2025, and related research has also started. Timetable for the production and sale of traditional energy vehicles.
The global automotive industry is accelerating the transition to intelligent and electrified. In order to grasp the new round of market opportunities, automotive electronics operators must understand the technological development trends of key components of new energy vehicles. Recently, I have had the opportunity to communicate with ADI automotive electronics experts, and I have sorted out some of the following points to readers.
Battery Management System (BMS)For the development of new energy vehicles, the importance of battery management systems is self-evident. With the development of battery technology, the endurance has been greatly improved, so safety and reliability have become the most critical factors, and with the intensification of competition in new energy vehicle brands, how to control costs is also the top priority of the industry. Therefore, Xu Zhibin, sales director of China Automotive Customer Division of Analog Devices, believes that there are three major characteristics that determine the competitive advantages of battery management:
The first is high precision. Recently, as the industry's accuracy requirements for battery power calculations continue to increase, more and more excellent battery technology has emerged, resulting in a flatter battery charge and discharge curve, so battery management chips need to have higher measurement accuracy, that is, in various Consistent high precision in the environment and conditions, including accurate measurement of voltage, current, temperature and other parameters. .
Second is high reliability. Due to the failure characteristics of lithium batteries, the reliability and safety of battery management systems are critical. Domestic manufacturers have begun to pay attention to system-level security design and the introduction of the ISO26262 standard. In the field of battery management chips, mainstream semiconductor manufacturers have integrated more and more fault reporting mechanisms, data verification mechanisms, and redundancy monitoring mechanisms in the chip to help customers achieve higher levels of system-level security and further improve the system. Reliability and robustness.
Finally, it is also the user's most concerned, that is, the appropriate system cost. With the challenge of subsidy policy, in order to make the terminal sales price reasonable, it is necessary to cooperate with suppliers at all levels to reduce costs.
These new technology trends are also the direction that ADI is working on in the field of battery management chips. ADI has many years of market leadership in battery management systems and is a reliable, high performance and reasonable system cost chipset proven by the market and customers. From battery management monitoring chip (LTC680x/LTC681x), to isolation (iCoupler? isoPower?), to current detection (ADuCM33x), to insulation detection, all kinds of chips are complete and the performance is first-class.
Lithium battery management system based on AD7280A
ADI is the leader in traditional 12V lead-acid battery management and has a global market share of over 95%. In many large cities in China, there are relatively serious congestion situations. Intelligent lead-acid battery management enables the start-stop system to shut down the engine while the battery can support electricity to reduce fuel consumption and, more importantly, to significantly reduce environmental pollution. ADI's current detection chip ADuCM703x/ ADuCM33x can accurately detect the current of the battery pack. It can be used not only for the traditional start-stop system, but also for many domestic and foreign customers. It is used in the lithium battery management system to accurately monitor the current of the battery pack. .
Isolation: In battery management and motor control systems, strong and weak electrical signals are isolated in many places. ADI's iCoupler? And isoPower? Series data and power isolators with excellent data rates and power consumption while meeting isolation levels. This lithium battery monitoring and protection system solution can be used in lithium battery monitoring and protection systems for energy, industrial and automotive applications. At present, this series of products has occupied the share of most domestic new energy vehicle isolation applications. We are also introducing a new generation of products with higher EMC performance and reliability to help domestic and foreign customers to meet the increasing technical standards of new energy vehicles.
ADI has established long-term relationships with car manufacturers and first-tier component suppliers. Based on long-term successful cooperation with new energy vehicles and suppliers at home and abroad, ADI will also launch a new generation of lithium battery management solutions in the near future. According to the actual needs of customers, we define and design, fully support customers to complete excellent system design and meet reasonable cost targets.
Motor control schemeWhether it is a traditional car or a new energy car, motor control is essential. The technical trends in this area have the following characteristics:
1. High precision.
2. Gradually increase the power, from electronic power steering to the drive motor of new energy vehicles.
3. High reliability requirements.
4. The right cost.
ADI has the largest market share in the Chinese market, the motor control resolver chip AD2S1205/AD2S1210 (can handle up to 3,125 RPS tracking rate with an accuracy of ±2.5 arc minutes), and strives to promote low-cost anisotropic magnetoresistance (AMR) program. In order to achieve a higher level of system security, it is also necessary for the module suppliers in the industry to accelerate the development of related software.
The AD2S1205 is a 12-bit RDC and the 10/12/14/16-bit resolution of the AD2S1210 can be set by the user. The chip features differential input and incremental encoder outputs, as well as programmable fault detection thresholds. They are used for motor shaft angle and speed measurements in gearbox, EPS and HEV/EV motors.
Functional Block Diagram for AD2S1205
ADI's AMR sensor, the ADA4571, integrates a signal conditioning amplifier and an ADC driver to generate two analog outputs that indicate the angular position of the surrounding magnetic field. It contains two chips, an AMR sensor and a fixed gain (nominal gain of 40) instrumentation amplifier in one package, providing clean and amplified cosine and sinusoidal output signals related to the angle of the rotating magnetic field. The output voltage range is proportional to the supply voltage. The chip can be used in next-generation motor control applications, greatly reducing system cost and achieving good functional performance.
ADAS and automated driving systemsThe development of new energy vehicles seems to be in line with the development of intelligent and intelligent. Relevant manufacturers have always been positive, and even many aspects have taken the lead, thus promoting the rapid development of various ADAS and autonomous driving technologies. Among them, the emerging radar technology is also In the continuous evolution, many innovative solutions have emerged.
Xu Zhibin pointed out that the millimeter wave radar can cover a range of several hundred meters, is not affected by light, and more accurately locates the position, moving direction, and moving speed of the object. Lidar can detect objects in the range of tens of meters to hundreds of meters with high precision, which is higher than millimeter wave radar, but the cost is much higher.
It is reported that ADI can provide industry-leading visual ADAS processor and complete 24GHz radar chip products. ADI is currently ahead of its competitors in the market and customer development of China's local 24GHz radar. We have a complete 24 GHz signal chain chipset to help Chinese customers achieve blind spot detection, forward detection and other radar products to mass production.
24 GHz ADAS Radar Chipset Signal Chain
Xu Zhibin said: "ADI's 2 rounds and 4 receivers 24GHz radar solution can achieve farther detection range, wider speed detection range, and higher distance, speed and angle than the channel with fewer channels. Resolution. With the popularity of V2V and V2X, the real-time data that autopilot needs to process will increase in number of stages, which puts higher demands on the performance of the processing chip. ADI can provide unique TelemaTIcs transceiver chip. Ideal for V2V and V2X related applications.
Some key sensorsIn addition, automotive sensor technology innovation is also worthy of attention, gyroscopes and accelerometers can be well coordinated to achieve safer and smarter cars, such as collision detection.
According to Xu Zhibin, ADI has the industry's leading satellite sensors and central sensors, mass production in the automotive industry. There is also an electronic body stabilization system. ADI has industry-leading gyroscopes and accelerometers, as well as highly integrated solutions. Mass production in the automotive industry. At the same time, ADI also provides a very high precision inertial navigation / detection unit that can be used to achieve different levels of autonomous driving.
Xu Zhibin concluded: "As the world's leading digital-analog mixed-signal processing chip manufacturer and senior supplier of automotive chip industry, ADI has very mature knowledge and experience in chip definition, R&D, technical support, sales, supply, quality, and channel. In pursuit of high performance and high reliability solutions, ADI has a very important position in the automotive ecosystem and has established a very close relationship with customers. We value the Chinese market and customers, deeply cultivate the Chinese market, and establish a perfect Chinese sales and Support the team and focus on the long-term to solve the customer's actual pain."
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