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Power battery charging remaining time estimation method and device and electric vehicle

A technology for charging remaining time and power batteries, which is applied in electric vehicles, battery/fuel cell control devices, vehicle energy storage, etc., and can solve problems such as charging current changes and unproposed solutions

Active Publication Date: 2020-06-02
BORGWARD AUTOMOTIVE CHINA CO LTD
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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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  • Power battery charging remaining time estimation method and device and electric vehicle
  • Power battery charging remaining time estimation method and device and electric vehicle
  • Power battery charging remaining time estimation method and device 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 power battery charging remaining time estimation method and device and an electric vehicle. The method comprises the following steps: acquiring a first charging duration anda second charging duration of the power battery, wherein the first charging duration is the charging duration of the power battery in the heating period, the power battery is in a heating state and acharging state at the same time in the first charging duration, the second charging duration is the duration from an electric quantity at the end of charging of the power battery in the heating periodto a full charge state of the power battery, and the power battery is only in the charging state in the second charging duration; and estimating the charging remaining time of the power battery by adopting the first charging duration and the second charging duration. According to the invention, the technical problem that the finally determined actual charging time and the charging remaining timedisplayed at the beginning of charging have a large error due to the fact that the influence of temperature change on current change is ignored in a power battery charging remaining time estimation mode provided in related technologies is solved.

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 Applications(China)
IPC IPC(8): B60L58/10
CPCY02T10/70
Inventor 梅银成
Owner BORGWARD AUTOMOTIVE CHINA CO LTD
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