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A method and device for obtaining charging current limit value and discharge current limit value

A technology of charging current and discharging current, which is applied in the field of charging or discharging current regulation, and can solve the problems of battery working efficiency reduction and non-use etc.

Inactive Publication Date: 2017-07-11
BEIJING BORGWARD AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] But in fact, during the use of the battery, the performance of the battery is constantly changing, such as internal resistance, capacitance and other parameters will change with the use time, resulting in the rated parameters are no longer suitable for use, using the rated parameters to adjust the battery When charging and discharging, the working efficiency of the battery will be reduced

Method used

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  • A method and device for obtaining charging current limit value and discharge current limit value
  • A method and device for obtaining charging current limit value and discharge current limit value
  • A method and device for obtaining charging current limit value and discharge current limit value

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Embodiment 4

[0084] This embodiment provides a device for obtaining the discharge current limit, such as Figure 6 The unit shown consists of:

[0085] The acquisition unit 61 is used to acquire the discharge voltage value; in order not to affect the normal working state of the battery, it is preferable to establish an equivalent circuit and a state model for the battery, and then obtain the discharge voltage value through the equivalent circuit. Preferably, the acquisition unit 61 include:

[0086] A parameter acquisition subunit 611, configured to acquire the discharge current value and the parameters of the discharge object;

[0087] The voltage calculation subunit 612 is configured to calculate a discharge voltage value according to the obtained discharge current value and the parameters of the discharge object.

[0088] A comparison unit 62, configured to compare the discharge voltage value with the lower limit value of the rated voltage of the discharge object;

[0089] The first ...

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Abstract

The present invention provides a method and device for obtaining the charging current limit value and the discharge current limit value. The method for obtaining the charging current limit value includes: obtaining a charging voltage value; Values ​​are compared; when the charging voltage value is greater than the rated voltage upper limit value of the charging object, reduce the initial charging current until the current charging voltage value is less than the rated voltage upper limit value of the charging object; according to the The current charging current value and the current charging voltage value as well as the previous charging current value and the previous charging voltage value are calculated to obtain the charging current limit value.

Description

technical field [0001] The invention relates to the field of charge or discharge current regulation. In particular, it relates to a method and a device for obtaining a charging current limit value and a discharge current limit value. Background technique [0002] When performing charging and discharging operations on the charging and discharging object, it is necessary to select the signal strength according to the rated parameters of the charging and discharging object. For example, for a rechargeable battery, the manufacturer stipulates the upper limit of the charging voltage, the lower limit of the discharging voltage and the charging current of the battery according to the performance of the battery. Limit value and discharge current limit value. Under ideal conditions, the best results can be obtained by using the above parameters to charge and discharge the battery. [0003] But in fact, during the use of the battery, the performance of the battery is constantly chang...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00
Inventor 苏海霞乔贞美
Owner BEIJING BORGWARD AUTOMOBILE CO LTD