With the rapid development of new energy vehicles, the electric quantity detection system is very important for the safety and performance of new energy vehicles. Linear Hall sensor is a common ADG779BKSZ-REEL7 Sensors are widely used in power detection systems. This paper will introduce the principle, characteristics and application of the linear Hall sensor, and discuss the application of the linear Hall sensor in the system in combination with the requirements of the new energy vehicle electricity detection system.
1. Introduction
The development of new energy vehicles has promoted the research and application of electric quantity detection system. The power detection system is mainly used to measure the power and status of the battery to provide accurate power information. The traditional electric quantity detection methods include voltage method and current method, but these methods have some limitations. As a new detection method, linear Hall sensor has high precision and reliability, so it is widely used in the electric quantity detection system of new energy vehicles.
2. Principle and characteristics of linear Hall sensor
Linear Hall sensor is a kind of sensor based on Hall effect. The current is obtained by measuring the strength of magnetic field. Its working principle is that when the current passes through the sensor, the sensor will produce a magnetic field perpendicular to the current direction, and the strength of the magnetic field is proportional to the size of the current. Linear Hall sensors have the following characteristics:
(1) High sensitivity: linear Hall sensor can measure weak magnetic field changes, with high sensitivity.
(2) Wide dynamic range: The linear Hall sensor has a wide dynamic range, which can meet the detection requirements of different current ranges.
(3) Contactless measurement: the linear Hall sensor does not need to contact the measured current directly, avoiding the problems of contact resistance and thermal effect in traditional measurement methods.
(4) Fast response: linear Hall sensor has a fast response speed and can monitor the change of current in real time.
3. The Application of Linear Hall Sensor in the New Energy Vehicle Electric Quantity Detection System
The application of linear Hall sensor in the electric quantity detection system of new energy vehicles mainly includes the following aspects:
(1) Battery current detection: linear Hall sensor can measure the charge and discharge current of the battery and provide real-time current information of the battery. By monitoring the change of current, you can judge the usage and health status of the battery.
(2) Battery power estimation: The linear hall sensor can estimate the remaining power of the battery by combining the current change and current integration of the battery. Accurate electricity information can be provided by real-time monitoring current and estimating electricity.
(3) Battery temperature detection: the linear hall sensor can also be combined with the temperature sensor to detect the temperature change of the battery. The temperature of the battery has an important impact on the estimation and safety of the power, so the detection of the battery temperature is also one of the important functions of the power detection system.
(4) Charging state monitoring: Linear Hall sensor can monitor the charging state of the battery in combination with the change of charging current. The charging speed and efficiency of the battery can be judged by monitoring the size and change of the charging current.
4. Conclusion
As a new type of sensor, the linear Hall sensor has high accuracy and reliability, and has a broad application prospect in the electric quantity detection system of new energy vehicles. By measuring the current of the battery, estimating the power, detecting the temperature and monitoring the state of charge, the linear hall sensor can provide accurate power information and provide important support for the safety and performance of new energy vehicles. In the future, with the development of new energy vehicles and the progress of battery technology, the application of linear Hall sensors in the electricity detection system will be further expanded and optimized.
