A method for measuring the power of a vehicle-mounted power battery of an electric vehicle

Abstract

The embodiment of the present invention discloses a power metering method of a vehicle-mounted power battery of an electric vehicle, which includes the following steps: detecting the power-off of the battery in the no-load state of the power battery of the electric vehicle when the engine is turned off, and counting the self-discharge amount of the battery; dividing the load of the power battery into Several series coupling function modules, use the metering unit to count the power consumption of each series coupling function module in real time; calculate the battery life time according to the power consumption of each series coupling function module in unit time; this scheme superimposes each function The power consumption capacity of the module and the self-discharge of the power battery can calculate the remaining power of the electric vehicle, predict the life time of the power battery under the current power consumption, and play the role of early warning and timely charging of the electric vehicle.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of electric vehicles, and in particular to a method for measuring electric vehicle power battery power. 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 power battery power has become a concern of electric vehicle users. Electric vehicle (BEV) refers to a vehicle that is driven by a vehicle-mounted power supply, driven by a motor, and meets 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] For electric vehicles currently in use, it is difficult to build a model to calculate the remaining power, the calculation procedures are complicated, and the calculated remaining power is not accurate. The owner cannot kno...

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Problems solved by technology

[0004] For this reason, the embodiment of the present invention provides a power metering method for the vehicle-mounted power battery of an electric vehicle. By superimposing the power consumption capacity of each functional module and the self-discharge of the power battery, the remaining power of the electric vehicle can be calculated, which can be predicted in the current The life time of the power battery under the power consumption plays the role of early warning and timely charging of the electric vehicle, so as to solve the difficulty of building a model for calculating the remaining power in the prior art, the calculation procedure is complicated, and the calculated remaining power is not accurate. The problem of not being able to know the amount of remaining power at the first time

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