Air pressure monitoring system and monitoring device for monitoring thermal event of power battery pack of electric vehicle
A power battery pack and air pressure monitoring technology, which is applied in the direction of fluid pressure measurement, measuring device, and current/voltage measurement by changing the ohmic resistance, can solve the problems of short life, low reliability, and false positives, and achieve long life, Reliable, fast results
Pending Publication Date: 2022-07-22
广东迈能欣科技有限公司
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Problems solved by technology
For batteries of different materials, when the battery cells fail, the gas components produced are different, so there are also cases of underreporting
At the same time, sensors based on electrochemical characteristics have problems such as short life and low reliability.
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[0035] In order to make the above objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.
[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terms used herein in the description of the present invention are for the purpo...
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The invention relates to an air pressure monitoring system and device for monitoring a thermal event of a power battery pack of an electric vehicle. The air pressure monitoring system comprises a controller unit, a pressure detection unit, a power supply conversion unit, a data interface unit and an abnormal state monitoring unit, the pressure detection unit, the data interface unit and the abnormal state monitoring unit are respectively in electrical connection and data communication with the controller unit, the controller unit receives monitoring data from the pressure detection unit, the monitoring data is forwarded to the data interface unit after being processed, and the data interface unit interacts with a vehicle machine system. According to the air pressure detection principle, the air pressure change speed in the battery pack in the power battery module is monitored in real time, so that the thermal event of the power battery is monitored. The detection precision is high, the speed is high, the detection accuracy is good, and the conditions of false alarm and missing alarm do not exist. Different from a gas component detection principle, the device adopts non-electrochemical reaction detection, and is high in reliability and long in service life.
Description
technical field [0001] The invention relates to the technical field of power battery safety, in particular to an air pressure monitoring system and a monitoring device for monitoring thermal events of a power battery pack of an electric vehicle. Background technique [0002] According to the mandatory requirements for electric vehicle power battery safety. A thermal event warning signal should be provided within five minutes prior to causing danger to the crew member. Therefore, electric vehicles require mandatory installation of devices and monitoring systems that can monitor thermal events of the power battery. At present, the commonly used thermal event detection methods include voltage detection, temperature detection, and gas detection technology, but related detection technologies have certain limitations. [0003] The voltage detection technology determines whether there is a thermal event by detecting the output voltage value of the cell. When the cell fails, the ...
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Login to View More IPC IPC(8): G01R31/36G01R31/382G01R19/00G01L9/06G01L19/04
CPCG01R31/36G01R31/3644G01R31/382G01R19/00G01L9/06G01L19/04
Inventor 蒋利平邓自强赵雷磊吴簿勇汪海洋谷文李威
Owner 广东迈能欣科技有限公司