Estimation method of SOP of electric automobile lithium batteries

A technology for electric vehicles and lithium batteries, which is applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve the problems of low use efficiency of lithium batteries, and achieve the effects of reducing battery costs, increasing service life, and improving acquisition efficiency.

Pending Publication Date: 2018-06-29
杭州六创电动汽车科技有限公司 +1
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AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for estimating the SOP of the lithium battery of an electric vehicle to solve the technical problem that the SOP estimation of the lithium battery of the electric vehicle causes the low efficiency of the lithium battery of the electric vehicle

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  • Estimation method of SOP of electric automobile lithium batteries
  • Estimation method of SOP of electric automobile lithium batteries
  • Estimation method of SOP of electric automobile lithium batteries

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Embodiment Construction

[0028] A method for estimating the SOP of an electric vehicle lithium battery comprises the following steps in turn:

[0029] Step 1: Obtain the parameters of the battery system: respectively obtain the SOC value of the battery system and the current value I of the battery system at the next moment pred , the current value I of the current battery system, the highest voltage value U of the current battery system max , the lowest voltage value U of the current battery system min ;

[0030] Step 2: Obtain predicted state parameters: obtain the future state quantity SOC of the battery according to the parameters obtained in step 1 pred and battery future voltage response U pred ;

[0031] Step 3: Calculation of SOP: Estimate the SOP value of the battery according to the predicted state parameters obtained in Step 2.

[0032] By obtaining the parameters of the battery system, obtaining the predicted state parameters, and calculating the SOP to estimate the SOP of the lithium ...

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Abstract

The invention relates to an estimation method of SOP of electric automobile lithium batteries. The method successively comprises the following steps: acquiring parameters of a battery system, acquiring predictive state parameters and calculating SOP. The estimation method has the advantages that the SOP of the electric automobile lithium batteries can be estimated by the method comprising the steps of acquiring parameters of the battery system, acquiring the predictive state parameters and calculating the SOP; the SOP of the electric automobile lithium batteries can be accurately estimated, sothat the utilization frequency of the electric automobile lithium batteries can be improved, and the damage to the batteries caused by excessive usage can also be effectively avoided; the power performance of the electric automobiles can be improved; the service life of the electric automobile batteries can be prolonged; the cost of the needed batteries can be effectively reduced; and the estimation method is simple.

Description

technical field [0001] The invention relates to a method for estimating the SOP of a lithium battery of an electric vehicle. Background technique [0002] The SOP (State of Power, the current power capability of the battery) of the lithium battery of an electric vehicle directly reflects the maximum discharge and charging power that the battery can provide to the vehicle when the electric vehicle is under instantaneous and continuous high current at the next moment; if the SOP can be accurately It is estimated that it can not only greatly improve the use efficiency of lithium batteries in electric vehicles, but also effectively protect the batteries from damage caused by overuse, which is of great significance for improving the power performance of electric vehicles and increasing the service life of electric vehicle batteries. The existing SOP for electric vehicle lithium batteries is estimated by the SOP definition, the maximum discharge and charge power that the battery c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36
CPCG01R31/3644
Inventor 杨琳赵旭金珂邓湘武郭中元曹贝贝
Owner 杭州六创电动汽车科技有限公司
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