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Estimation method of cruising range of electric vehicles
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A cruising range and electric vehicle technology, which is applied in the field of estimating the cruising range of electric vehicles, can solve the problems such as the inability to keep the driving speed continuously stable, the inability to know the cruising range of the vehicle, and the inability to obtain the cruising range result.
Active Publication Date: 2021-04-06
CHONGQING CHANGAN AUTOMOBILE CO LTD
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[0003] At present, there is a large difference between the displayed mileage and the actual mileage of most electric vehicles in the market, and different temperature environments and driving speeds have a great impact on the actual mileage; the current actual mileage estimation methods for electric vehicles are generally It is estimated by driving on a specific road section under a full battery state. There are two defects in this method; first, when the electric vehicle is actually driving, the driving speed cannot be kept stable continuously, and the actual continuation of the vehicle at a specific speed cannot be known. Second, limited by the road conditions and the location of the charging station, the electric vehicle cannot be driven until the battery is completely exhausted, and the result of the full driving range cannot be obtained.
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example 1
[0055] 1) The test vehicle can run at any speed, or consume battery power by turning on the air conditioner and other electrical loads at idling speed; when the battery power is consumed close to 0, charge the battery until the battery is fully charged, and record the battery power at this time The charging capacity is 25kw h;
[0056] 2) The first group of tests: the test vehicle was driven at a speed of about 50km / h for a total of 4 hours, and then the vehicle was charged until the battery was fully charged, and the recorded charging capacity was 22kw h;
[0057] 3) The second group of tests: the test vehicle is driven at a speed of about 50km / h, and the cumulative driving time is 0.5h; at a speed of about 100km / h, the cumulative driving time is 1h, and then the vehicle is charged until the battery is fully charged, and the charging capacity is 20kw h;
[0058] Note: The ambient temperature range of the test area during the test is 15°C-20°C;
[0059] Refer to the method i...
example 2
[0079] 1) The test vehicle can run at any speed, or consume battery power by turning on the air conditioner and other electrical loads at idling speed; when the battery power is consumed close to 0, charge the battery until the battery is fully charged, and record the battery power at this time The charging capacity is 39.5kw h;
[0080] 2) The first group of tests: the test vehicle was driven at a speed of about 40km / h for a total of 4.5 hours, and then the vehicle was charged until the battery was fully charged, and the recorded charging capacity was 21.7kw h;
[0081] 3) The second group of tests: the test vehicle is driven at a speed of about 40km / h, and the cumulative driving time is 2.5 hours; at a speed of about 90km / h, the cumulative driving time is 1.2 hours, and then the vehicle is charged until the battery is fully charged, and the charging capacity is 31.5kw h;
[0082] Note: The ambient temperature range of the test area during the test is 19°C-26°C;
[0083] Re...
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Abstract
The invention discloses a method for estimating the cruising range of an electric vehicle, comprising: step 1, when the battery power is consumed close to 0, charge the battery until the battery is fully charged, and record the charging power of the battery at this time as W; step 2, Carry out m tests on the test vehicle, and get m groups of speed intervals V i , the accumulated travel time is T ji test data; step 3, each group of data obtained from the test is substituted into , and P i , where P i For the vehicle to overcome the speed range V i The total power required for driving resistance and the power of each electrical appliance; step 4, use the calculation to obtain the speed range V i The actual cruising range L of the vehicle. The invention can accurately estimate the cruising range of the electric vehicle under different speed intervals.
Description
technical field [0001] The invention belongs to the technical field of electric vehicle testing, and in particular relates to a method for estimating the cruising range of an electric vehicle. Background technique [0002] In recent years, the proportion of sales of electric vehicles in the entire passenger vehicle market has increased year by year, and the quality problems related to electric vehicles have gradually increased. Among them, user complaints about the driving range of electric vehicles account for a large proportion. [0003] At present, there is a large difference between the displayed mileage and the actual mileage of most electric vehicles in the market, and different temperature environments and driving speeds have a great impact on the actual mileage; the current actual mileage estimation methods for electric vehicles are generally It is estimated by driving on a specific road section under a full battery state. There are two defects in this method; first,...
Claims
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