An energy control method, device and system for an electric vehicle

Abstract

The invention discloses an energy control method, device and system for an electric vehicle. The energy control method includes: monitoring whether the working state data of the vehicle meets a preset low temperature starting condition, and the working state data includes the battery of the vehicle. temperature information, the vehicle speed information and the accelerator pedal status information; if so, control the super capacitor to supply power to the motor control module of the vehicle, and control the super capacitor to heat the battery at the same time; monitor the temperature of the battery during the heating process Whether the preset startup temperature threshold is reached, the startup temperature threshold refers to a temperature that can stabilize the performance of the battery; if so, stop heating the battery and control the battery to supply power to the motor control module. The technical solution provided by the present invention can make up for the defect of poor charge-discharge performance of the lithium-ion battery at low temperature, so as to improve the power performance and endurance of the electric vehicle at low temperature as a whole.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to an energy control method, device and system for an electric vehicle. Background technique [0002] The electric vehicle market has shown explosive growth, but there are many problems behind the rapid growth. For example, in the field of energy management systems, how to achieve efficient use of electric energy in the use of electric vehicles is one of the core issues in the field of electric vehicle technology. [0003] At present, the most widely used lithium-ion batteries in the market are lithium-ion batteries with high energy density, especially ternary lithium-ion batteries. Due to the poor charge and discharge performance of lithium-ion batteries for electric vehicles in low temperature environments, electric vehicles cannot be used in large areas in cold areas. application. [0004] When the temperature of lithium-ion battery is about -30℃, the charging and disc...

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Problems solved by technology

[0006] The object of the present invention is to provide an energy control method, device and system for electric vehicles aimed at the energy control of conventional electric vehicles at present, so as to make up for the defects of poor low-temperature performance of lithium-ion batteries, so as to solve the problem of poor power performance of vehicles in low-temperature environments. The problem of shortened mileage

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