Puri wins: The development of electric vehicles requires automotive-grade BMS

As the main supplier of BMW i-series electric vehicles and battery management systems (BMS) for 3, 5, and 7 series plug-in hybrid vehicles, Preh has been relatively mysterious and low-key in China. With the growth of electric vehicle sales, the company's BMS market share continues to increase, and is favored and recognized by Chinese brand car companies.

In the field of electric vehicle power battery management system (BMS), Junsheng Electronics is quite mysterious. The outside world knows that its BMS business is mostly derived from relevant capital research reports. In the author's memory, probably one day three years ago, there were news reports that Junsheng Electronics' BMS products were recognized by the famous automobile manufacturer BMW and received bulk orders.

Coincidentally, in June 2013, the author went to Beijing BMW China headquarters to communicate with BMW electric vehicle related project leaders. At that time, I was particularly interested in the topic of BMW electric vehicle BMS. At that time, BMW's i-series electric cars have not yet officially landed in China. However, after this trip, the author has become more interested in the BMS of Junsheng Electronics.

Junsheng Electronics officially intervened in the BMS field after completing its acquisition of Preh in Germany in June 2011. Founded in 1919, the latter has a history of nearly one hundred years and has a prominent position in the global automotive electronics field. It has several major technology patents including BMW iDrive and Audi MMI system. Through the acquisition of Preh, Joyson Electronics has won the opportunity to talk with famous car companies such as BMW, Audi and Mercedes-Benz, and become the core electronic product supplier of these high-end car brands.

Ningbo Puri Junsheng Auto Electronics Co., Ltd. is a subsidiary of Puri in Germany to further expand the Chinese market. In June 2016, the author visited the company and interviewed Mr. M. Bischoff, executive director of Purui Junsheng Electric Transportation, and made a close contact with the mysterious Puri.

Mr. M. Bischoff, Executive Director of Purui Electric Power Transportation

In fact, as early as 2011, Puri in Germany began to provide BMS solutions for BMW's hybrid models. In 2013, its pure electric and plug-in hybrid BMS solutions began to be applied in batches to the BMW i3 and i8 series. In 2015, the ZINORO 1E pure electric car produced by BMW Brilliance and the Arrizo 7 plug-in hybrid car produced by Chery Automobile were all mass-produced with Puri's BMS solution.

The global new energy vehicle market has experienced explosive growth in 2015. According to data from GasgoNew Energy, in 2015, BMW sold a total of 33,412 electric vehicles worldwide, an increase of 87.8% compared with 17,793 units in 2014. Puri is the exclusive supplier of BMS for BMW electric vehicles. In addition to BMW, Preh is also a BMS partner for the new energy models of the Daimler Group.

"The luxury brand car companies represented by BMW attach great importance to the comfort and functional safety of vehicles, and the requirements for BMS are extremely high." Bi Shafu particularly stressed: "A good BMS product, its hardware must be car-level. This is ignored by some companies. At the same time, accurate monitoring of voltage and current is the basis for BMS work and battery protection. According to reports, the level of software and hardware development and process control of development, process and production are decided. The mass production performance of BMS products. Puri's BMS is developed and produced in strict accordance with the requirements of functional safety ISO26262. There are independent protection chips in the hardware. Even if the entire battery pack system works in the limit state, the battery pack can be secured by the protection chip.

With the growth of the sales of partners' electric vehicles, Puri's BMS market share continues to soar, becoming the most beautiful point in the 2015 annual report of Joyson Electronics.

According to the annual report, Joyson Electronics' revenue for BMS products in 2015 accounted for more than 95% of its new energy power control system products, exceeding RMB 283 million.

Bi Shafu said that China is the world's largest electric vehicle market. More and more Chinese brand car companies have established cooperative relations with Puri, showing that Chinese car companies pay more attention to the performance of new energy vehicles and the quality of BMS products. High pursuit.

With the outbreak of the new energy vehicle market, more and more companies are flooding into the BMS field. Bi Shafu said that some of the battery management systems of "BMS" companies that were originally engaged in consumer electronics applications may find it difficult to meet automotive-level requirements. “The car requires a service life of more than 10 years or 150,000 kilometers. BMS is the core component of the car, and it should meet the requirements of the car class in terms of reliability and life.”

Puri's BMS products have accumulated a large amount of reliable and practical verification experience and data in electric vehicle applications. According to reports, in fact, before the cooperation with the BMW i series electric models, Preh's BMS products have been applied in large quantities in the European market. “In Europe, our products are first used in engineering vehicles, commercial vehicles and electric forklifts. After a long period of extensive verification, our BMS products are reliable both in terms of functional safety and reliability. BMW chose us as one of the main suppliers of its BMS."

During the interview, Bi Shafu specifically mentioned the "scalability" of BMS. The current power battery has various technical routes such as lithium iron phosphate, lithium titanate, and ternary materials. Different types of power batteries have different requirements for BMS.

Bishof said that the scalability of BMS determines whether it is suitable for different types of batteries. “Our BMS can be applied to different types of power batteries by matching and calibrating related batteries.”

Bi Shafu told the author that Puri's BMS has industry-leading battery-balanced design and complete software solutions in terms of technology. The products meet the most stringent hardware design and production process standards, and are jointly developed and integrated with the world's leading OEMs. ability.

At the end of BMS, a number of forward-looking electric vehicle solutions were developed in the early stages.

In addition to BMW, Daimler and Chery mentioned above, a large number of outstanding domestic vehicle companies such as China CRRC and Geely Automobile are also partners of Joyson Electronics. The cooperation with Geely is expected to be mass-produced this year.

The company's core businesses include driving safety, smart cars, new energy vehicles, and smart manufacturing and other related products and services. According to the 2015 annual report of Joyson Electronics, the company has entered the Tesla supply system. The company's new acquisition of KSS and Tesla also have cooperation in the security field. As a subsidiary of Joyson Electronics Group, Puri's main businesses and products include automotive intelligent driving and intelligent manufacturing industrialization 4.0 in addition to new energy fields.

In the field of new energy vehicles, Puri has a variety of different solutions, including battery management systems for 48V systems, high-voltage BMS for 800V systems, and DC/DC converters. "We hope to promote the global development of new energy vehicles, and the ongoing technology development will provide the most suitable solution according to the choice of the OEM," Bi Shaofu said.

At present, Puri has established a R&D center with complete development capability in Ningbo, but BMS products are still produced in German factories. “The BMS products we provide to our Chinese partners are currently produced by German factories. In order to better serve our domestic customers, we have determined to establish a complete production capacity in Ningbo. From 2017, we will be from Ningbo production line to China. BMS and related products are available from partners in neighboring countries."

At present, China's electric vehicle BMS market, product cost is still one of the most concerned factors. With the increasing emphasis on driving safety and driving experience by independent brand car companies, the demand for high-performance BMS will increase significantly.

The author believes that BMS is no longer an add-on product derived from the perspective of managing batteries. With the development of electric and intelligent vehicles, BMS will be given more functions and basic functions. Deducting more characters - accurate, reliable, safe, human, and so on. The realization of these functions and roles must be based on the automotive-grade BMS.