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Method and device for estimating remaining time of power battery charging and electric vehicle

A technology for remaining charging time and power batteries, applied in electric vehicles, battery/fuel cell control devices, vehicle components, etc., can solve problems such as unproposed solutions, charging current changes, etc., to improve charging experience, improve estimated longitude, Accurately Estimated Performance

Active Publication Date: 2021-08-24
BORGWARD AUTOMOTIVE CHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even in the absence of thermal management, during the actual charging process, the temperature will change, resulting in a change in the charging current, resulting in a large difference between the final determined actual charging time and the charging remaining time displayed at the beginning of charging
[0004] For the above problems, no effective solution has been proposed

Method used

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  • Method and device for estimating remaining time of power battery charging and electric vehicle
  • Method and device for estimating remaining time of power battery charging and electric vehicle
  • Method and device for estimating remaining time of power battery charging and electric vehicle

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Embodiment Construction

[0028]In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0029] It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate c...

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Abstract

The invention discloses a method and device for estimating the remaining charging time of a power battery and an electric vehicle. The method includes: acquiring a first charging duration and a second charging duration of the power battery, wherein the first charging duration is the charging duration of the power battery during the heating period, and the power battery is in a heating state and a charging state at the same time within the first charging duration, The second charging time is the time that the power battery takes when the power battery is fully charged from the heating period to the time when the power battery is fully charged. The power battery is only in the charging state during the second charging time; the first charging time and the second charging time are used. Estimate the remaining charging time of the traction battery. The present invention solves the problem that the method for estimating the remaining charging time of power batteries provided in the related art ignores the influence of temperature changes on current changes, resulting in a relatively large error between the final determined actual charging time and the remaining charging time displayed at the beginning of charging technical issues.

Description

technical field [0001] The invention relates to the field of electric vehicles, in particular to a method and device for estimating the remaining charging time of a power battery and an electric vehicle. Background technique [0002] At present, the method for estimating the remaining charging time of the battery provided in the related art usually calculates the remaining charging time by dividing the remaining charging capacity by the charging current. The accuracy of this estimation method can only be realized under the premise that the charging current remains constant. However, since the actual vehicle power battery will be accompanied by the change of battery voltage, the charging current will also change constantly. Therefore, some battery management system (BMS) remaining capacity estimation methods will divide the charging process into multiple stages according to the change of charging current, and then The charging time is calculated by dividing the charging capa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L58/10
CPCY02T10/70
Inventor 梅银成
Owner BORGWARD AUTOMOTIVE CHINA CO LTD
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