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Vehicle speed control method and system based on time optimization

A vehicle speed control and time-optimized technology, applied in the direction of the control device, can solve the problems of vehicle speed limit, high discharge power, and inability to drive, so as to avoid the effect of excessive travel time

Active Publication Date: 2021-08-13
SICHUAN YEMA AUTOMATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During high-speed operation in summer, the speed of the vehicle is often limited due to the high discharge power due to the high speed of the vehicle, or even the inability to drive, which has a great impact on customer travel.

Method used

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  • Vehicle speed control method and system based on time optimization
  • Vehicle speed control method and system based on time optimization
  • Vehicle speed control method and system based on time optimization

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Experimental program
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Embodiment 1

[0065] see figure 1 and figure 2 shown, figure 1 A schematic flowchart of a time-optimized vehicle speed control method provided by an embodiment of the present invention. figure 2 This is an overall flowchart of the time-optimized vehicle speed control method provided by the embodiment of the present invention.

[0066] According to the research of the applicant, at present, most of the power batteries of economical electric vehicles on the market adopt the natural cooling method to reduce the cost of the whole vehicle. When running at high speed in summer, the speed of the vehicle is often limited or even impossible to drive due to the fast speed and high discharge power, which has a great impact on the travel of customers. Therefore, the embodiment provides a method and system for finding the optimal time to reach the destination by planning the initial vehicle model, which can effectively reduce the time to reach the destination, and avoid the problem of speed limit o...

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PUM

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Abstract

The invention provides a vehicle speed control method and system based on time optimization, and the method comprises the following steps: setting an initial vehicle speed, and calculating a required current; finally realizing SOC updating according to the required current; integrating the vehicle speed, and calculating and updating the driving distance according to the vehicle speed integral; according to the SOC and the temperature, looking up a table to obtain an allowable maximum current, and according to a judgment result of a magnitude relationship between the allowable maximum current and the required current, determining whether to resolve the required current; and when the driving distance is greater than the preset driving distance, recording the total consumed time, re-executing the steps, reducing a fixed step length from the initial vehicle speed, carrying out iterative circulation until preset conditions are met, and obtaining the initial vehicle speed and the optimal planning time. According to the travel distance and the travel working condition, the optimal time is planned by adjusting the initial vehicle speed, the effect of arriving at the destination in the shortest time can be achieved, and the problems that the travel time is too long and even driving cannot be carried out due to limited power of a power battery are avoided.

Description

technical field [0001] The invention relates to the technical field of pure electric vehicles, in particular, to a time-optimized vehicle speed control method and system. Background technique [0002] Lithium-ion power batteries have become the main energy source for electric vehicles due to their excellent performance. However, lithium-ion batteries have higher requirements on operating temperature. In order to prolong the life of lithium-ion batteries and ensure their safe and reliable operation, the battery management system needs to manage the charging and discharging current of the battery according to the current temperature and power of the battery to ensure the safe operation of the battery. . [0003] The heat generated inside the lithium-ion battery includes four kinds of heat of reaction, Joule heat, polarization heat and side reaction heat. When the battery is working normally, the temperature range is 20-60 °C. At this time, the heat generated by the lithium-i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W40/105B60W40/00B60W40/13B60W50/00
CPCB60W40/105B60W40/00B60W40/13B60W50/00B60W2050/0002
Inventor 杨辉
Owner SICHUAN YEMA AUTOMATION CO LTD