Electric vehicle battery technology injects impetus into a sustainable future

With the continuous development and improvement of electric vehicle battery technology, it is easy for us to imagine the future world of transportation: whether it is private cars, SUVs, or trucks, all rely on batteries to run. Carbon emissions will be greatly reduced. But this is only the beginning. If the old batteries of electric vehicles (EV) are reused, they are expected to change the world in a more profound way-bringing small off-grid power supplies to remote areas of the world, where medical, education, and economic development depend on availability Cheap renewable energy.

Author: ADI

With the continuous development and improvement of electric vehicle battery technology, it is easy for us to imagine the future world of transportation: whether it is private cars, SUVs, or trucks, all rely on batteries to run. Carbon emissions will be greatly reduced. But this is only the beginning. If the old batteries of electric vehicles (EV) are reused, they are expected to change the world in a more profound way-bringing small off-grid power supplies to remote areas of the world, where medical, education, and economic development depend on availability Cheap renewable energy.

Although the foundation work for a better future has been laid, battery manufacturers still face severe challenges-from reducing the high cost of electric vehicle batteries (making electric vehicles competitive with internal combustion engine vehicles) to making reusable and recyclable batteries Batteries (so that when batteries can no longer be used in electric vehicles, they can also create value for other uses).

So, how can a future based on battery power become a reality? The answer depends not only on the support of consumers, decision makers and power companies, but also on the ability to establish the right partnership and make the right investment.

Lead the change

The potential of electric vehicles is exciting, especially in terms of environmental impact. More and more companies have made sustainable development their top priority. Research shows that an ecological approach can be translated into sales growth. The same is true in the field of electric vehicles. In 2017, the global sales of electric vehicles exceeded the 1 million mark, and then in 2018, the sales exceeded the 2 million mark (2.1 million), an increase of 65%. But in 2019, affected by the overall decline in global car sales, sales increased by only 9% (to 2.3 million vehicles). Nevertheless, it is expected that by 2030, the demand for electric vehicles will increase tenfold. Almost every region in the world has introduced newer incentives for the popularization of electric vehicles, and all large-scale OEMs are embarking on the electrification of their vehicles. The world is increasing investment in electrification.

However, there is still a price comparison problem in the electric vehicle industry. It is estimated that by 2030, the cost of electric vehicle batteries will continue to decline, but the cost of batteries, which account for more than one-third of the cost of electric vehicles, is still one of the main obstacles to achieving parity with gasoline-powered vehicles.

A potential solution is to use a highly accurate and safe battery management system (BMS) that can help automakers and parts manufacturers bridge the gap between today’s high-cost batteries and tomorrow’s cheaper batteries.

Patrick Morgan, vice president and general manager of ADI’s automotive business, said: “From a consumer perspective, there are several major problems. Larger batteries can achieve longer driving distances. The problem is that this will increase cost and weight. In order to solve this The problem, our approach is to make extremely efficient and precise Electronic devices for the battery management system, so that the car can get the most available energy from any particular battery pack.”

For industries such as trucks that have begun to invest heavily in electrification, this efficiency is even more critical. A McKinsey study shows that if batteries can meet demand, by 2030, as many as 20% of medium-duty trucks will be electric trucks. Susan Shaheen, co-head of the Sustainable Transportation Research Center at the University of California, Berkeley, said: “Electric vehicles may require additional downtime for recharging, which can have a detrimental effect on business performance, because electric vehicles spend more time without revenue than gasoline. Driven vehicle.”

Electric vehicle battery technology injects impetus into a sustainable future
Figure 1. In 2030, the proportion of electric vehicles in overall car sales is expected to reach approximately 20% to 25%

Electric vehicle battery technology injects impetus into a sustainable future

Efficiency starts at the finishing stage

The latest innovations in electric vehicle battery technology and battery manufacturing and management may revolutionize business and consumer scenarios. The production and finishing stages of batteries-battery formation and testing-are critical to ensuring the efficiency of the production line. The whole purpose of battery formation is to ensure that the manufactured battery cells have the maximum capacity and the highest reliability during the entire life cycle. For battery manufacturers and instrument suppliers, improving the scale and efficiency of electric vehicle production is the key to grasping the opportunities in the electric vehicle market.

“The products we sell touch all stages of the battery’s entire life cycle-from formation to operation, and then to echelon utilization. In the formation process, our products control the precise equipment that grows battery cells. This stage of the birth of battery cells is very important Determining the usable life is crucial,” Morgan explained.

Improve battery working conditions

Unlike a single energy storage element such as a fuel tank, the battery pack of an electric vehicle is composed of hundreds or thousands of cells that work together. When power flows into or out of the battery pack, the battery must be precisely managed with guaranteed accuracy to ensure that even under the harshest conditions, including extreme temperatures and environments with electromagnetic noise, the battery can stay in the entire vehicle Provide a larger usable capacity during the life cycle. In addition, in order to ensure safety, electronic products must be carefully designed from the beginning to fully comply with all strict and evolving safety standards worldwide. These standards are not limited to ASIL-D standards, but also need to develop innovative battery functional architecture.

Starting from this, ADI’s electric vehicle lithium-ion battery management system continuously measures the voltage of each battery cell, which is not only beneficial to battery life and performance, but also to ensure greater safety. Highly accurate state-of-charge measurement enables car manufacturers and component manufacturers to safely output maximum power. Morgan said: “Our products can guarantee extremely high accuracy throughout the life cycle of the car, allowing the battery to be quickly and safely charged and discharged to a greater extent, and maximizing the vehicle’s cruising range per charge.”

Better battery

Improving battery life and performance is the key to the full adoption of electric vehicles. Smarter and more accurate battery management systems are already helping automakers and parts manufacturers to make batteries support longer driving ranges.

Electric vehicle battery technology injects impetus into a sustainable future
Figure 2. Increased range of electric vehicle batteries

As the performance of BMS continues to improve, batteries will be able to better support the extended range of electric vehicles and the sensors of autonomous vehicles.

Wireless beam design eliminates system complexity

The new wireless battery management system brings disruptive changes to the industry. The wireless battery management system (WBMS) recently developed by ADI is built on the existing components of the wired BMS, eliminating the need to use wire harnesses to connect the cells together, saving engineering design and development costs, and eliminating related mechanical challenges and The complexity brought by the wiring harness. It also makes the battery pack design highly modular and scalable, so it can be used repeatedly in the design of different car models. In addition, because each battery module is wireless, it can collect and store data from the beginning of battery formation, to storage and assembly, and then to use in the car, so as to realize the calculation of battery status and give the battery pack The remaining battery power. This reduces the cost of batteries and makes battery cascading (or second-hand utilization) more effective, such as in energy storage, recycling or other applications, thereby reducing the total cost of manufacturers and car owners and limiting the impact on the environment.

Replacement: battery echelon utilization

The widespread adoption of electric vehicles will have a significant impact on the environment. According to ADI’s data, in 2019, vehicles equipped with the company’s BMS technology used ultra-precision battery performance measurement and did not require internal combustion engines when driving, reducing about 75 million tons of carbon dioxide emissions each year, which is equivalent to 80 million acres of mature The carbon absorption capacity of forests.

However, electric vehicle battery technology has more benefits: the use of batteries in cascades. As long as the battery of an electric vehicle is properly managed throughout its life cycle, depletion does not mean scrap. Removing electric vehicle batteries for reuse in energy storage solutions may be a key factor in powering off-grid communities.Considering that 940 million people (accounting for 13% of the world’s population) do not have electricity, and 3 billion people (accounting for 40% of the world’s population) do not have clean cooking fuel, it is not difficult to imagine the demand for micro and off-grid power solutions. How huge1.

Affordable power supply will bring many life-changing domino effects. Eliminating the use of unsafe cooking fuels can improve indoor air quality, thereby improving health. Electricity can power lighting equipment so that children can learn after dark. The equipment for supplying clean water and purifying wastewater can also be operated. Digital communication via Internet access becomes possible. Therefore, the cascading use of batteries may stimulate economic development gains that people once thought could not be achieved.

Electric vehicle battery technology injects impetus into a sustainable future

This makes the accuracy that ADI brings to the battery management system a more important consideration for car manufacturers, and the owners of secondary applications (such as energy storage system manufacturers) will benefit greatly from ADI’s wireless technology. This technology not only supports OEMs, but also helps create new industries and business models around battery recycling. “We are just beginning to see the benefits of wireless to the vehicle supply chain,” Morgan explained.

Electric vehicle battery technology injects impetus into a sustainable future
Figure 3. ADI’s wireless technology is widely used in automobiles

The wisdom of conventional engines

Twenty years ago, ADI introduced precision power and other measurement solutions for the automotive market for the first time. President and CEO Vincent Roche has not forgotten the past. Decades of experience in creating functions in the field of conventional internal combustion vehicles have played an important role in the company’s successful development of electric vehicle battery technology. Roche said: “We combine silicon solutions with increasingly complex mathematics in order to be able to understand the real world, including battery management systems. The depth of change will increase by several orders of magnitude every few years.”

1Source: Website: Ritchie, H. Roser, M. Access to Energy, ourworldindata.org, accessed on March 7, 2020.

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