Energy management method for battery electric vehicle

A technology of energy management and pure electric vehicles, which is applied in the direction of electric vehicles, electrical devices, vehicle components, etc., can solve the problems of heavy workload, differences, and cumbersome maintenance, so as to optimize the overall performance and ensure the effect of using experience

Inactive Publication Date: 2019-12-17

SHAANXI FAST GEAR CO

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However, the condition of each vehicle is different, and engineers need to go to the site to calibrate the relevant parameters of the vehicle based on the data collected b...

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Method used

[0027] 4) During the use of the vehicle, according to the collected input parameters, the corresponding en...

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Abstract

The invention discloses an energy management method for a battery electric vehicle and belongs to the field of energy consumption control. The energy management method for the battery electric vehiclecomprises the following steps: 1, utilizing endurance mileage as a response variable, and determining parameters by utilizing DOE (Design of Experiment) to obtain the significant analysis results offactors; 2, carrying out energy consumption tests according to the significant analysis results of the factors, and determining corresponding energy management methods; 3, based on different road conditions and driving habits, utilizing the steps 1 and 2 to obtain energy management methods under corresponding conditions; and 4, in the use process of the vehicle, according to the acquired input parameters, invoking the corresponding energy management method to carry out energy management and realize maximum endurance mileage. The method solves the problems of heavy manual calibration workload,complicated post maintenance and high cost under the existing conditions.

Application Domain

Electric devicesComplex mathematical operations

Technology Topic

Energy managementEngineering +4

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[0020] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is a part of the embodiments of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0021] It should be noted that the terms "first" and "second" in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and not necessarily used to describe a specific sequence or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations of them are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to the clearly listed Those steps or units may include other steps or units that are not clearly listed or are inherent to these processes, methods, products, or equipment.

[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings:

[0023] See figure 1 , figure 1 It is a flow chart of a pure electric vehicle energy management method of the present invention; a pure electric vehicle energy management method, based on the previous method of using different energy management strategies for different working conditions, combined with the DOE experimental design method, to identify and analyze the impact on response variables The biggest factor, according to the main factors, self-learning road conditions and driving habits, and selecting the best energy management strategy. A pure electric vehicle energy management method, based on the previous method of using different energy management strategies for different working conditions, combined with the DOE experimental design method, and identifying the factors that have the greatest impact on the response variables. According to the main factors, self-learning road conditions and driving habits, select Optimal energy management strategy. A pure electric vehicle energy management method includes the following steps:

[0024] 1) With the driving range as the response variable, the DOE experimental design is used to determine the parameters, and the significance analysis results of the factors are obtained;

[0025] 2) Conduct energy consumption tests according to the significance analysis results of the factors and determine the corresponding energy management methods;

[0026] 3) Based on different road conditions and driving habits, use steps 1)-2) to obtain energy management methods under corresponding conditions;

[0027] 4) During the use of the vehicle, according to the collected input parameters, the corresponding energy management method is called for energy management to maximize the driving range.

[0028] Specifically, the DOE experimental design in step 1) adopts the Latin hypercube design to determine the parameters. As a branch of mathematical statistics, DOE is composed of experimental planning, execution experiments, and result analysis, and can identify key experimental factors. In the optimization design of energy management strategy, because there are many parameters involved, in order to improve the optimization efficiency, first use DOE to analyze the geometric parameters of the energy management strategy and identify the key parameters.

[0029] Latin hypercube design is a kind of DOE design. In n-dimensional space, each coordinate interval is equally divided into m intervals, and m points are randomly selected to ensure that each level of a factor is only studied once , That is, the Latin hypercube design with n-dimensional space and m samples; it can analyze the parameters more effectively than random sampling test and orthogonal test.

[0030] Refer to Table 1, Table 1 Energy Management Strategy Influencing Factors; combined with previous energy consumption test data, analysis shows that parameters such as shifting point and energy recovery are the main influencing factors for energy management strategy, according to shifting point, energy recovery, throttle opening , Braking frequency, ambient temperature and other factors, respectively, conduct targeted energy consumption tests to determine a set of basic energy management strategies. During the use of the vehicle, select the most matching energy management based on the collection of external input parameters Strategies, and self-learning and updating strategies, so that the vehicle can adapt to different working conditions and different driving habits of different drivers, optimize the overall performance of the vehicle, and enhance the customer experience.

[0031] Table 1 Influencing factors of energy management strategy

[0032]

[0033]

[0034] The above content is only to illustrate the technical ideas of the present invention, and cannot be used to limit the scope of protection of the present invention. Any changes made on the basis of the technical solutions based on the technical ideas proposed by the present invention shall fall into the claims of the present invention. Within the scope of protection.

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Energy management method for battery electric vehicle

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Description & Claims & Application Information

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