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Battery charging discharging current limited value calculating method and device

A charging and discharging current and charging current technology, which is applied to the calculation of the battery charging and discharging current limit, and the calculation device field of the battery charging and discharging current limit, which can solve the problems of low accuracy of the charging and discharging current limit of the battery, data deviation, etc. , to achieve the effect of improving performance and calculation accuracy

Inactive Publication Date: 2015-08-12
BEIJING BORGWARD AUTOMOBILE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the disadvantage of the related technology is that the data in the value look-up table is fixed, and the parameters of the battery will constantly change during the use of the battery. Values ​​have less precision

Method used

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  • Battery charging discharging current limited value calculating method and device
  • Battery charging discharging current limited value calculating method and device
  • Battery charging discharging current limited value calculating method and device

Examples

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Embodiment Construction

[0034] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0035] The method and device for calculating the battery charging and discharging current limit according to the embodiments of the present invention will be described below with reference to the accompanying drawings.

[0036] figure 1 It is a flow chart of a calculation method for a battery charging and discharging current limit according to an embodiment of the present invention. like figure 1 As shown, the calculation method of the battery charge and discharge current limit includes the following steps:

[0037] S1: Obtain...

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Abstract

The invention discloses a battery charging discharging current limited value calculating method and a battery charging discharging current limited value calculating device. The battery charging discharging current limited value calculating method comprises the following steps: acquiring a current charge state and current test temperature of a battery unit of a battery pack; calculating current AC impedance and current compensation voltage according to the current charge state, the current test temperature, the predetermined AC impedance relation table, and the predetermined compensation voltage relation table; acquiring an estimation battery voltage calculating formula according to the current charge state, the current AC impedance, and the current compensation voltage; determining a plurality of charging current values and a plurality of discharge current values, and calculating the corresponding estimation battery voltage values respectively according to the estimation battery voltage calculating formula; and calculating battery charging discharging current limited values according to a plurality of charging current values, a plurality of discharging current values, and the corresponding estimation battery voltage values. The battery charging discharging current limited value calculating method is advantageous in that the battery charging discharging current limited values can be calculated in a real-time manner during the use of the battery, and the calculating precision of the battery charging discharging battery limited values can be improved.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a calculation method for a battery charge and discharge current limit and a battery charge and discharge current limit calculation device. Background technique [0002] During the driving of the electric vehicle, the vehicle controller needs to obtain the power limit of the battery, so it needs to calculate the charge and discharge current limit of the battery. Most of the related technologies are to test the battery pack first, obtain a charge and discharge current limit lookup table, and store it in the electronic control unit, and then obtain the charge and discharge current limit of the battery by querying the charge and discharge current limit lookup table. value. [0003] However, the disadvantage of the related technology is that the data in the value look-up table is fixed, and the parameters of the battery will constantly change during the use of the battery. Values ...

Claims

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Application Information

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IPC IPC(8): G01R31/36
Inventor 乔贞美
Owner BEIJING BORGWARD AUTOMOBILE CO LTD
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