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Interview with Yingrui Chuang (Qingjie Electronics): Killing the hidden danger of car spontaneous combustion from the chip side

By Industry News
2022-09-13
17

In 2022, China's total vehicle sales will be 27.5 million units, a year-on-year increase of 5.4%, of which new energy vehicle sales will be 5 million units, a year-on-year increase of 47%. It can be seen from the data that new energy vehicles will continue to expand the share of vehicle sales in the future, but in the stage when the demand and supply of new energy vehicles continue to increase, spontaneous combustion of batteries occurs frequently.

If you want to reduce the spontaneous combustion of new energy vehicles, you must first understand the reasons for the spontaneous combustion in order to prescribe the right medicine. For this reason, we interviewed Nanjing Yingruichuang Electronic Technology Co., Ltd., which was selected as the 2021-2022 China IC Unicorn Enterprise. Nanjing Yingruichuang Electronic Technology Co., Ltd. (SENASIC), as a leading automotive chip supplier in China, focuses on the research and development, design and sales of high-performance automotive-grade chips, and provides customers with automotive electronic sensor chips and complete systems. solution.

Battery packs bring self-ignition hazards to new energy vehicles

We know that there are many reasons for the spontaneous combustion of new energy vehicles. As far as the battery pack is concerned, this part is installed on the chassis of the car. When the vehicle is squeezed, collided, water enters, or the battery pack is punctured, the circuit is aging, and the overcharge is overcharged. When it is discharged, it will cause the thermal runaway of the battery pack, which will eventually lead to fire or even explosion.

At present, most of the pure electric vehicles we can understand are inseparable from the self-ignition of fire and charging. Although the equipment of charging piles in some large cities has been relatively complete, the quality of various charging piles is uneven, and the charging power of charging piles is not high. Stability, excessive current, and high voltage will affect the battery pack, which may cause spontaneous combustion.

The rare high temperature weather this summer has brought challenges to the battery safety of new energy vehicles. If the vehicle continues to drive in a high temperature environment at this time, the battery cannot be effectively dissipated, and the battery pack may overheat, causing heat Out of control, the battery pack caught fire and spontaneously ignited. And compared with fuel vehicles, new energy vehicles burn faster, require longer firefighting times, and are more difficult to handle. Faced with the possible risk of thermal runaway of the battery, how to warn the battery of spontaneous combustion and ensure the safety of the people in the car has become a pain point in the industry.

According to Mr. Wen Li, Vice President of R&D of Jinjie Electronics, the battery pack sensor monitoring chips innovatively launched by Jinjie Electronics, including BPS chips and BAS chips, provide faster and more reliable thermal runaway management for battery pack thermal runaway of new energy vehicles. Monitoring management measures.

Chip early warning has become a new idea to prevent spontaneous combustion

In May 2020, the Ministry of Industry and Information Technology formulated and released the mandatory national standard GB 38031-2020 "Safety Requirements for Power Batteries for Electric Vehicles", which requires that when the thermal runaway of the car battery pack occurs, an early warning should be given 5 minutes in advance to reserve a safe escape for drivers and passengers. time.

It is understood that the BPS-SNP805 innovatively launched by Jinjie Electronics is a pressure sensing monitoring chip for battery pack thermal runaway management application scenarios. The chip has built-in pressure sensing MEMS, front-end amplifying processing circuit, high-precision ADC, signal processing, interface The transmission circuit, temperature sensor, pressure sensor and power supply voltage monitoring unit can monitor the pressure change of the battery pack in real time, and issue an early warning when the pressure change exceeds the normal range.

 

Not only has innovative technology been made in battery pack runaway management, Wen Li said that Jinjie Electronics is the only domestic vehicle-grade battery pack sensor monitoring chip (BPS) and automobile tire pressure sensor chip (TPMS) to achieve mass production The domestic chip supplier of the goods. The positioning of Jinjie Electronics is to be the world's leading supplier of automotive wireless sensor chips. It mainly lays out product lines around the perception, processing and transmission of smart car signals to meet the development trends and requirements of the new four modernizations of automobiles. The perceived demand of energy vehicles is the key planning and layout direction.

In the future, around the perception, processing and transmission of automotive working condition information, especially wireless transmission, Jinjie Electronics will also launch a series of automotive-grade and industrial-grade intelligent sensor chips to fully meet the needs of customers in the automotive, energy storage, industrial and other markets. The needs of integration, wireless, and platform realize the corporate vision of "the world's leading supplier of automotive electronic products".