Intelligent battery management system for electric passenger vehicles based on 5G-Iot high-precision temperature sensor

Abstract

The invention provides an intelligent battery management system for electric passenger vehicles based on a 5G-Iot high-precision temperature sensor, and relates to array application of the high-precision temperature sensor of satellite timing based on a 5G Internet of Things. measurement and control of the terminal voltage and the current of each series battery pack, edge calculation and cloud computing are cooperated to together constitute the electric passenger vehicle on-board intelligent battery management system, catastrophic accidents such as spontaneous combustion of an electric passenger vehicle power battery system are avoided, the service life of an electric passenger vehicle power battery and the power battery full-life endurance mileage are prolonged, and the residual use value of the power battery after decommissioning is improved.

Description

[0001] (1) Technical field: [0002] The intelligent battery management system for electric passenger vehicles based on 5G-IoT high-precision temperature sensors of the present invention relates to an array application of high-precision temperature sensors for satellite timing based on 5G Internet of Things, which cooperates with the measurement of terminal voltage and current of each series battery pack. , control, edge computing, and cloud computing, together constitute an on-board intelligent battery management system for electric passenger vehicles, to prevent catastrophic accidents such as spontaneous combustion of electric passenger vehicle power battery systems, and to extend the service life of electric passenger vehicle power batteries and the full life of power batteries The cruising range increases the residual use value of the power battery after retirement. [0003] (2) Background technology: [0004] The International Practical Temperature Scale is based on temper...

AI Technical Summary

Problems solved by technology

[0010] In the power battery system that is connected in parallel first and then in series, when the self-discharge current of a single power battery in the parallel battery pack increases abnormally, the temperature rises, and other batteries in the pack will discharge through the single battery, making its temperature further increase. When the single battery reaches the critical deflagration temperature, it becomes the "detonator" that detonates the battery pack; the power battery system of the electric passenger car in the prior art cannot completely eliminate the internal short circuit of the battery Technical problems that cause spontaneous combustion of automobiles;

[0011] Lithium-ion batteries, especially ternary lithium-ion batteries, battery cells with large internal resistance may be slightly overcharged and overdischarged each time they are charged and discharged; battery inconsistency causes the weakest battery to lose active lithium ions or form The micro-lithium dendrites are the most serious every time, which accelerates its aging process and the increase of its internal resistance. Usually, its self-discharge current and operating temperature are also the highest; when the battery short circuit causes a car spontaneous combustion accident, the BMS often simultaneously Burned down, the accident investigation process is lengthy, lacks real data support, and lacks convincing

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