Method and apparatus for predicting battery charge electricity

Abstract

The invention relates to a battery charge forecasting method and a device which can effectively forecast the battery charge state of a vehicle. The invention has two technical proposals based on the same invention concept: 1. the battery charge forecasting method is characterized in that the charge and the discharge between a high voltage battery and an inverter of the whole vehicle part are carried out through a high-voltage wire, and a main controller obtains the current charge state according to the charge and the discharge current signals, the battery temperature signal and the battery voltage signal. 2. The battery charge forecasting device for realizing the method is characterized in that the device is provided with a battery current sensor and a battery temperature sensor; the current sensor and the temperature sensor are respectively connected with a current detection loop and a temperature detection loop; the device is simultaneously provided with a battery voltage detection loop; single output ends of the temperature detection loop, the current detection loop and the voltage detection loop are connected with an A / D converter; and the single output end of the A / D converter is connected with the main controller.

Description

technical field [0001] The invention relates to a method and a device for predicting the charge of an automobile battery. Background technique [0002] As a chemical power source, a battery is essentially different from a physical power source. Due to the non-repeatable working characteristics of chemical power sources, it is necessary to consider many factors, such as: external environment (such as ambient temperature), operating parameters (charging and discharging current, charging and discharging time), and its own characteristics (characteristics of various types of batteries). Make a more accurate prediction of the battery state of charge. [0003] At present, the use of chemical power sources in the fields of mobile phones, notebook computers, and various electric tools has become very common, and the research and application of its state of charge prediction are relatively simple and mature, and are also recorded in various documents, such as CN200510007491.3 paten...

AI Technical Summary

Problems solved by technology

If the battery is used in an electric vehicle, especially in a hybrid vehicle, the charging and discharging current value changes in a large range, and the operating temperature also changes greatly. If the above simple method is still used, it will not meet expectations at all. Accuracy value, not only can not optimize the performance of the vehicle, but may eventually lead to serious battery damage or even scrapped

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