Vehicle control method based on power battery service life optimization

A power battery, vehicle control technology, applied in hybrid vehicles, motor vehicles, data processing management, etc., can solve the problems of high power battery price and high cost of electric vehicles, and achieve the effect of prolonging service life and reducing costs.

Inactive Publication Date: 2018-01-19
GUIHANG YOUNGMAN LOTUS AUTOMOBILE
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  • Abstract
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Problems solved by technology

[0003] However, power batteries are expensive and account for a relatively high cost of electric vehicles. P

Method used

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  • Vehicle control method based on power battery service life optimization
  • Vehicle control method based on power battery service life optimization
  • Vehicle control method based on power battery service life optimization

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Embodiment Construction

[0025] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0026] This method is applicable to both hybrid vehicles and pure electric vehicles. The following uses a hybrid PHEV vehicle as an example to illustrate.

[0027] Such as figure 1 As shown, the hybrid vehicle divides the operation mode into two stages according to the SOC state of the power battery, namely the charge depleting (CD) stage and the charge sustaining (CS) stage. In the CD stage, usually the power battery alone or together with the generator set provides vehicle drive power. In the CS stage, the vehicle control method keeps the SOC within a narrow window to ensure the service life of the power battery. LCD is the mileage of the vehicle in the CD stage. Vehicle control methods are divided into the following two cate...

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Abstract

The invention provides a vehicle control method based on power battery service life optimization. During an energy consumption phase, when an engine set is forbidden to start, a quick path is providedfor decrease of an SOC value of the power battery; or a relative slow path is provided for the decrease of the SOC value of the battery when the vehicle is driven by the battery and motor set power at the same time during the driving of the vehicle; and during the energy maintenance phase, the SOC value of the power battery is maintained out of a narrow window, so service life of the power battery can be guaranteed. Parts of functions of BMS are integrated to the vehicle controller VCU; optimal energy management is conducted based on different driving habits of drivers and environment factors; a dynamic planning global optimization algorithm is applied for energy distribution and optimization of the electric vehicle upon different driving work conditions, mileages, control methods and battery features; and service life of the power battery can be prolonged and vehicle cost can be reduced.

Description

technical field [0001] The invention relates to the field of new energy vehicles, in particular to a vehicle control method based on power battery life optimization. Background technique [0002] In this field, the vehicle controller (hereinafter referred to as VCU) and the battery management system (hereinafter referred to as BMS) are usually separated, and do not have a life estimation model and optimize the life of the battery pack. [0003] However, power batteries are expensive and account for a relatively high cost of electric vehicles. Prolonging the life of power batteries to reduce the cost of using the vehicle has become the key to research. Contents of the invention [0004] Aiming at the deficiencies of the prior art, the present invention proposes a vehicle control method based on power battery life optimization. [0005] Vehicle control method based on power battery life optimization: [0006] During the energy expenditure phase: [0007] When the engine g...

Claims

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Application Information

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IPC IPC(8): B60W20/13B60W10/26
CPCY02T10/84
Inventor 李田田吴晓峰杭子明
Owner GUIHANG YOUNGMAN LOTUS AUTOMOBILE
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