Calculation method for overcharging time of electric vehicle
A charging time and overcharging technology, which is applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve the problems of inaccuracy, large error, charging time and overcharging time cannot be obtained accurately, etc.
Active Publication Date: 2021-11-19
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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The rough calculation of charging time in the prior art is mostly based on W=P*t. This calculation method is only theoretically feasible. In real application scenarios, it is affected by various factors such as the environment, and the error is particularly large. When the battery power reaches about 80%, its charging power will gradually decrease. During the whole charging process, it is impossible to accurately describe the change of its charging power, so the charging time and overcharging time cannot be accurately obtained, and even a rough estimate using the formula is not accurate
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[0026] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0027] An embodiment of the present invention proposes a calculation method for the overcharging time of an electric vehicle, figure 1 Shown is the flow chart of the calculation method, refer to figure 1 , the calculation method includes the following steps S1-S5:
[0028] Step S1 , according to the historical charging record of the charging pile, obtain the shortest charging time for the electric vehicle from multiple initial SOCs to the final SOC of 100%. SOC refers to the state of charge (State of Charge), which is the ratio of the remaining capacity of the battery to the capacity of the fully charged state. It is usually expressed as a percentage, such as 1%, 5%, 20%, 80%, etc., and its value range is 0 ~1, when SOC=0, it means the battery is fully discharged, when SOC=1, it means the battery is fully charged.
[0029] The charging pile ...
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The invention discloses a method for calculating the overcharging time of an electric vehicle, and the method comprises the steps: S1, obtaining the shortest charging time of the electric vehicle from a plurality of initial SOCs to a final SOC of 100% according to the historical charging record of a charging pile; S2, respectively calculating the battery capacity of the corresponding vehicle and the average battery capacity of the charging pile service vehicle by using each shortest charging time and the corresponding charging amount; S3, judging the abnormal shortest charging time according to the battery capacity of the corresponding vehicle and the average battery capacity, and correcting or eliminating the abnormal shortest charging time; S4, processing the shortest charging time data one by one, so as to enable the shortest charging time to meet the condition that the shortest charging time from the smaller initial SOC to the final SOC of 100% is always larger than the shortest charging time from the larger initial SOC to the final SOC of 100%; and S5, comparing the charging time of the charging record of a certain initial SOC with the shortest charging time corresponding to the same initial SOC in the shortest charging time data obtained after processing in the step S4, and calculating the overcharging time.
Description
technical field [0001] The invention relates to the technical field of electric vehicle charging, in particular to a method for calculating the overcharging time of an electric vehicle according to historical charging records of charging piles. Background technique [0002] At present, there are many studies and discussions on charging time, but there is no research on the overcharging time of electric vehicles. The rough calculation of charging time in the prior art is mostly based on W=P*t. This calculation method is only theoretically feasible. In real application scenarios, it is affected by various factors such as the environment, and the error is particularly large. When the battery power reaches about 80%, its charging power will gradually decrease. During the whole charging process, it is impossible to accurately describe the change of its charging power, so the charging time and overcharging time cannot be accurately obtained, and even a rough estimate using the for...
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IPC IPC(8): G01R31/382
CPCG01R31/382Y02T10/70
Inventor 杨朋高周张凯
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV