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Charging remaining time display method

A technology of charging remaining time and display method, applied in secondary battery charging/discharging, circuits, electrical components, etc., can solve the problem of large estimation error, different estimation accuracy cannot be improved, and battery aging is not considered, so as to shorten the charging time. Effect

Pending Publication Date: 2020-08-04
SHANGHAI COTECH AUTOMOTIVE ENG CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even if the remaining charging time of the final output is limited, it cannot improve the situation that the estimation accuracy is different in different charging stages
[0010] In addition, without considering the aging of the battery, the estimation error will become larger and larger

Method used

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Examples

Experimental program
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Effect test

Embodiment

[0047] This embodiment provides a method for estimating the remaining charging time during DC fast charging, and the method includes the following steps:

[0048]A. Estimation of the initial value of the remaining charging time:

[0049] 1. The DC charging pile is connected to the vehicle through the charging gun, and the charging is started by swiping the card.

[0050] 2. After charging is started, the battery management system judges the initial stage of charging and the total number of charging stages according to the current highest cell voltage.

[0051] 3. After the calculation of the initial stage of charging and the total number of this charging stage is completed, according to the designed entry voltage, exit voltage, internal resistance of the battery and the designed charging current of each charging stage, calculate the actual entry voltage and single charge current of each charging stage. Body actual exit voltage.

[0052] After the calculation of the actual en...

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Abstract

The invention relates to a charging remaining time display method. The method comprises the steps: calculating the total number of a charging starting stage and a charging stage; calculating monomer actual entry voltage and monomer actual exit voltage of each charging stage; looking up the table to obtain the actual entering charge and the actual exiting charge of the monomer in each charging stage; calculating the charging capacity and the charging estimation time of each charging stage, and obtaining a charging remaining time initial value according to the charging estimation time; calculating to obtain charging remaining time; and displaying charging remaining time by a display. Compared with the prior art, the initial value of the charging remaining time can be accurately estimated, accumulated estimation errors are eliminated, and the condition of battery aging is compatible.

Description

technical field [0001] The invention relates to the field of new energy vehicle battery charging, in particular to a method for displaying remaining charging time. Background technique [0002] With the continuous development and popularization of new energy vehicles, users' demand for diversified charging functions is constantly increasing. This is not only reflected in the functional design areas such as charging speed and charging safety, but also in other more important aspects such as charging appointments and remaining charging time display. The field of functional design that is more user-friendly and allows users to increase the sense of use of the product. [0003] Therefore, it is very necessary to accurately estimate the remaining time of charging. At the same time, compared with AC charging, which has a more stable charging time, the estimation of the remaining time of DC charging is also more complicated. [0004] The current industry estimates the remaining ti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/44H01M10/48
CPCH01M10/44H01M10/488Y02E60/10
Inventor 张扬
Owner SHANGHAI COTECH AUTOMOTIVE ENG CORP LTD
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