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Lithium-ion battery thermal protection

Among many lithium ion protection schemes, multi-level protection schemes have been widely adopted to obtain high safety of lithium ion batteries. Usually multi-level protection includes active and passive protection schemes. The basic parameters of control are mostly voltage, current and temperature. In recent years, due to the limited increase in energy density, in order to meet the requirements of customers, rapid charging has rapidly spread. From the perspective of design habits and certification testing, customers tend to pay more attention to voltage monitoring and protection, while ignoring the passive protection devices that were used before.Over temperature protection performance of PTC and MHP-TA, they use two sets of IC+Mos active protection scheme and NTCTemperature monitoring. Whether there is irrationality in such a design, there is still debate in the industry. This article tries to talk a little bit about the actual use.As shown in Fig. 1, the lithium ion battery adopts...

2019 - 05 - 07
Function and Typical Fault Analysis of Automotive Temperature Sensor

The temperature sensors on the car are mostly negative temperature coefficient thermistors, such as the intake air temperature sensor of the engine,Coolant temperature sensor, oil temperature sensor, oil temperature sensor for automatic transmission and continuously variable transmission, dual clutch transmission G93 transmission oil temperature sensor for monitoring transmission oil sump oil temperature, G509 temperature sensor for monitoring transmission clutch oil temperature, The indoor temperature sensor, the ambient temperature sensor, the evaporator temperature sensor, the suspension air pump temperature sensor, etc. of the air conditioner are all negative temperature coefficient thermistors. It is characterized by the higher the temperature of the measuring point, the lower the resistance value of the sensor, and the lower the output voltage signal. Taking the Mazda intake air temperature sensor as an example, when the ambient temperature is -20 °C, 20 °C, and 60 ...

2013 - 11 - 30
Application Status of Sensor Application Technology in Automobiles

In the era of rapid development of electronic technology, automotive control systems are gradually moving toward electronic control systems, and the most important one of these electronic control systems is sensor application technology. In the sensor market, traditional sensors are gradually being phased out. The current state of the art is an intelligent, multi-functional, miniaturized, integrated sensor, and this sensor will gradually become an indispensable part of automotive sensors.Since the German Carl Mercedes developed the world's first car in 1885, the car has gradually become an indispensable means of transportation in people's lives. However, in today's era of rapid development of science and technology and progressive social progress, the control system of automobiles has gradually turned to electronic control systems. Such vehicles are called electronic vehicles. The most important one of the control systems of such electronic vehicles is the application of se...

2013 - 11 - 30

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