Electric vehicle battery residual power monitoring method and monitoring system thereof

A technology of remaining power and monitoring system, which is applied in the field of electric vehicles, can solve problems affecting calculation accuracy, etc., and achieve the effect of ensuring accuracy and convenient use

Inactive Publication Date: 2016-12-07
CHONGQING SOKON IND GRP CO LTD
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0002] In an electric vehicle, the state of charge of the battery pack (including the available total capacity and remaining power) seriously affects the performance and endurance of the electric vehicle. State of charge and monitoring and management; in the prior art, the electric vehicle battery management system always evaluates the storage battery based on the fixed value at the factory, so as to evaluate the available total capacity according to the charging and discharging state. , due to the influence of

Method used

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  • Electric vehicle battery residual power monitoring method and monitoring system thereof
  • Electric vehicle battery residual power monitoring method and monitoring system thereof

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Embodiment Construction

[0035] figure 1 Be the flow chart of the present invention, figure 2 It is a functional block diagram of the present invention. As shown in the figure, a method for monitoring the remaining power of an electric vehicle battery provided by the present invention includes:

[0036] After the vehicle is used and before the battery is charged, detect the voltage and battery temperature of the single cells in the battery, compare the detected voltages of each single cell, determine the single cell with the lowest voltage, and record the single cell The voltage V1 and the position number, and obtain the percentage X of the corresponding remaining power according to the voltage V1;

[0037] Charge the battery pack, detect the charging current I and charging time, and calculate the charging quantity Q when the battery pack is fully charged, where Q=∫Idt;

[0038] After fully charged, the voltage V2 of the single battery with the smallest voltage before charging is collected, and the...

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Abstract

After a vehicle is used and before a battery is charged, the voltage and the temperature of an individual cell in the battery are detected. The detected voltage of individual cells is compared to determine a single cell with the smallest voltage. The voltage V1 and the position number of the single cell are recorded. According to the voltage V1, the percentage X of the residual power at the corresponding temperature is acquired. A battery pack is charged, and charging power is calculated. After charging, the voltage V2 of the single cell with the smallest voltage before charging is acquired. According to the voltage V2, the percentage Y of the corresponding residual power is acquired. The total available capacity Qz is calculated, and the total available capacity value is updated. The total available capacity of the battery can be accurately monitored. The total available capacity of the battery pack is updated in real time. The accuracy of ultimate residual power monitoring is ensured. The method and the system are easy for use.

Description

technical field [0001] The invention relates to the field of electric vehicles, in particular to a method for monitoring the remaining power of an electric vehicle storage battery and a monitoring system thereof. Background technique [0002] In an electric vehicle, the state of charge of the battery pack (including the available total capacity and remaining power) seriously affects the performance and endurance of the electric vehicle. State of charge and monitoring and management; in the prior art, the electric vehicle battery management system always evaluates the storage battery based on the fixed value at the factory, so as to evaluate the available total capacity according to the charging and discharging state. , due to the influence of temperature and aging state, its fixed total capacity changes and gradually decreases, that is to say, with the use of the battery, when the battery is fully charged, its total capacity is less than the factory fixed value, then the fac...

Claims

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Application Information

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IPC IPC(8): G01R31/36
CPCG01R31/3835
Inventor 张兴海王伟汤建程波陈龙
Owner CHONGQING SOKON IND GRP CO LTD
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