A method and system for measuring high-power DC electric energy of a vehicle-mounted power battery

Abstract

The embodiment of the present invention discloses a method and system for measuring high-power direct-current electric energy of a vehicle-mounted power battery, including pre-testing the self-discharge of the power battery, and establishing a multivariate relationship model between the self-discharge power W and the environmental parameters of the electric vehicle; The load is divided into several coupling modules connected in parallel according to their functions, and the electric energy metering unit is used to calculate the linear current of each coupling module in real time; the initial total power C of the power battery after a single charge is monitored in real time, and the power battery is calculated in use. The total energy consumption of each coupling module in the process; according to the self-discharging power W obtained by the multivariate relationship model, and the total power consumption Q of all coupling modules, calculate the remaining power of the power battery after a single charge q; This scheme can determine the real-time dynamic self-discharge capacity of the power battery in real time, calculate the total self-discharge amount of the power battery after a single charge, and improve the accuracy of the battery remaining capacity of the power battery.

Description

technical field [0001] The embodiment of the present invention relates to the technical field of battery electric energy calculation, and in particular to a method and system for measuring high-power DC electric energy of a vehicle-mounted power battery. Background technique [0002] As people's awareness of environmental protection is getting stronger and stronger, electric vehicles have gradually become popular as a means of transportation. The monitoring of the battery power of electric vehicles has become a concern of electric vehicle users. Electric vehicles (BEV) refer to vehicles powered by on-board power supplies, driven by motors, and meeting the requirements of road traffic and safety regulations. Due to its smaller impact on the environment than traditional cars, its prospects are widely optimistic. [0003] At present, most of the methods for calculating the high-power DC electric energy of the vehicle-mounted power battery of electric vehicles are as described ...

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Problems solved by technology

[0005] To this end, the embodiment of the present invention provides a method and system for measuring high-power DC electric energy of a vehicle-mounted power battery. The multivariate relationship model among them can determine the real-time dynamic self-discharge quantity of the power battery in real time, calculate the total amount of self-discharge of the power battery after a single charge, and improve the accuracy of statistics on the remaining battery capacity of the power battery to solve the current problem. In the existing technology, the loss of battery self-discharge power is not considered, so the accuracy of calculating and counting the remaining battery capacity is low

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