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Method for estimating charging remaining time

A technology for the remaining charging time and charging time, which is applied to the charging/discharging of secondary batteries, circuits, electrical components, etc., and can solve the problems of inaccurate results of the remaining charging time of the battery, inability for operators to determine, and large errors.

Inactive Publication Date: 2017-06-20
HUIZHOU EPOWER ELECTRONICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] When charging the battery, the user usually wants to see the remaining charging time of the battery, and the allowable charging current of the battery is different at different temperatures, and the charging current that the battery management system BMS requests the charger to output is also different. Currently, it is only considered to use Charging remaining capacity divided by the charging current To calculate the remaining charging time , because the charging current will change with the temperature and the cell voltage, the result of the remaining charging time of the battery calculated in this way is not accurate, not only the error is large, but also the use of = / The calculated remaining charging time will change frequently due to current changes, resulting in the value of the remaining time not decreasing as the charging time increases, and the displayed value will fluctuate from large to small, and the operator cannot determine how much time is left. After charging, the visual perception is poor

Method used

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Embodiment Construction

[0014] In order to facilitate those skilled in the art to better understand the present invention, further description will be given below in conjunction with specific examples.

[0015] When charging the battery, the battery management system BMS detects that the battery temperature T is within T1 ≤ T < T2, and queries the battery maximum allowable current meter according to the battery characteristics (in a certain temperature range, the maximum allowable charging current corresponding to batteries with different characteristics) Find the maximum allowable charging current of the battery at temperatures T1 and T2, and take the smaller value as the maximum allowable charging current of the battery; if the battery temperature T fluctuates during charging, reset the maximum allowable charging current of the battery .

[0016] At the same time, calculate the current remaining charging capacity Q0 of the battery, the current remaining charging capacity Q0 of the battery = rated c...

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Abstract

The invention provides a method for estimating charging remaining time. The method comprises the following steps: calculating the current remaining charging capacity of a battery; setting the charging process to be n charging stages, and charging the voltage of the battery to be voltage V1, V2 to Vn in sequence; setting corresponding charging current I1, I2 to In; judging the remaining charging capacities of the battery corresponding to V1, V2 to Vn respectively; calculating the quantity of electricity charged into the battery in each stage; detecting the current voltage value of the battery and judging the corresponding charging stage, and calculating the time required in each charging stage, and adding the time required in each charging stage so that the charging remaining time t of the battery can be obtained.

Description

technical field [0001] The invention relates to the field of batteries, in particular to a method for estimating remaining charging time. Background technique [0002] When charging the battery, the user usually wants to see the remaining charging time of the battery, and the allowable charging current of the battery is different at different temperatures, and the charging current that the battery management system BMS requests the charger to output is also different. Currently, it is only considered to use Charging remaining capacity divided by the charging current To calculate the remaining charging time , because the charging current will change with the temperature and the cell voltage, the result of the remaining charging time of the battery calculated in this way is not accurate, not only the error is large, but also the use of = / The calculated remaining charging time will change frequently due to current changes, resulting in the value of the remaining t...

Claims

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Application Information

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IPC IPC(8): H01M10/42H01M10/44H01M10/48
CPCH01M10/42H01M10/44H01M10/486Y02E60/10
Inventor 刘飞文锋王占国韦方
Owner HUIZHOU EPOWER ELECTRONICS
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