Electric vehicle electric balance calculation method

Abstract

The invention discloses an electric vehicle electric balance calculation method. The method comprises the following steps: step 1, vehicle data acquisition: a total load current I<total 1> is acquiredunder the maximum limit working condition of vehicle power supply; step 2, preliminary model selection of a DC / DC converter; the output current of the DC / DC converter is I<output>, the model of the DC / DC converter is preliminarily selected according to the principle that I<output> is greater than I<total 1>, and step 3, redundancy design verification on the output current of the DC / DC converter is performed after model selection to determine whether the output current redundancy design requirement is met or not. The method has the advantages that a electric vehicle electric balance calculation method is provided, the model selection of the DC / DC converter of the electric vehicle is conveniently realized, the electric balance requirement is met, the calculation method is simple and reliable, the redundancy design of the output current can also be verified when the electric balance requirement is met, and the problems of output power waste and cost increase caused by excessive DC / DC output current are prevented.

Description

technical field [0001] The invention relates to the field of automobile electrical appliances, in particular to a calculation method for electrical balance of electrical appliances of an electric vehicle. Background technique [0002] With the rapid development of automotive electronic technology, in response to the national call for energy conservation and emission reduction, electric vehicles have developed in a blowout manner. The development of electric vehicles has inherited the configuration requirements of fuel vehicles, and the electrical functions are increasing and complex. The requirements for comfort and intelligence are getting higher and higher, which in turn leads to higher requirements for the power supply balance of the whole vehicle circuit. The power supply balance of the whole vehicle of electric vehicles refers to the power generation and Consumption reaches a balanced state, which is a relatively important item in the performance index of the vehicle. I...

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Problems solved by technology

[0002] With the rapid development of automotive electronics technology, in response to the national call for energy conservation and emission reduction, electric vehicles have developed in a blowout manner. The development of electric vehicles has inherited the configuration requirements of fuel vehicles, and the electrical functions are increasing and complex. The requirements for comfort and intelligence are getting higher and higher, which in turn leads to higher requirements for the power supply balance of the whole vehicle circuit. The power supply balance of the whole vehicle of electric vehicles refers to the power generation and Consumption reaches a balanced state, which is a relatively important item in the performance index of the vehicle. It reflects the matching relationship between the output capacity of the DC / DC converter and the power demand of the vehicle's electrical appliances. The demand for power supply balance is different. In the prior art, the calculation of the power supply balance of the whole vehicle needs to consider the season, environment, and the working nature of the power consumption of electrical components (continuous, short-term, random, etc.), and the electric vehicle also needs to consider the working conditions of the whole vehicle State (operating conditions, charging conditions), the power consumption of the whole vehicle is different under different working conditions. According to the above factors, the power consumption of each electrical device in different seasons, environments, and vehicle working conditions is sorted out The details of the situation, the calculation process is more cumbersome

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