Method for metering electric quantity of vehicle-mounted power battery of electric vehicle

Abstract

The embodiment of the invention discloses a method for metering the electric quantity of a vehicle-mounted power battery of an electric vehicle. The method comprises the following steps of: carrying out battery power-down detection in a no-load state of a flameout power battery of an electric vehicle, and counting the self-discharge quantity of the battery; dividing the load of the power battery into a plurality of series coupling function modules, and counting the power consumption of each series coupling function module in real time by using a metering unit; and calculating the endurance time of the battery according to the power consumption of each series coupling function module in unit time. According to the scheme, the residual electric quantity of the electric vehicle can be calculated by superposing the power consumption capacities of the function modules and the self-discharge of the power battery, the endurance time of the power battery under the current power consumption canbe predicted, and the effect of giving an early warning and timely charging the electric vehicle is achieved.

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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