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Battery modeling method based on Simscape platform

A modeling method and battery technology, applied in electrical digital data processing, instruments, calculations, etc., can solve problems such as parallel circuits and cumbersome simulation of complex circuits, and achieve the effect of simple modeling and strong flexibility

Active Publication Date: 2014-03-12
SHANDONG UNIV
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Problems solved by technology

In the research on the overall performance of the battery pack, the Matlab / Simulink platform is generally used for modeling analysis, but the Matlab / Simulink platform modeling needs to propose mathematical equations based on physical laws, and then build corresponding simulation models based on the mathematical models, which is in the parallel circuit , complex circuit simulation is cumbersome

Method used

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  • Battery modeling method based on Simscape platform
  • Battery modeling method based on Simscape platform
  • Battery modeling method based on Simscape platform

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Embodiment Construction

[0034] The present invention is described in detail below in conjunction with accompanying drawing:

[0035] attached figure 1 It is a schematic diagram of a battery model used to establish a battery model based on the Simscape platform. Of course, the present invention is not limited to this battery model, and it is only for the convenience of illustration. E in the picture m is the open circuit voltage of the battery, R 0 is the ohmic internal resistance of the battery, R 1 is the polarization internal resistance of the battery, C 1 is the polarized capacitance of the battery, which is related to R 1 A resistance-capacitance circuit is formed to simulate the dynamic characteristics of the battery. Predecessors have done a lot of research on these, and think that these parameters are related to battery SOC, temperature and current flowing through it. At the same time, the predecessors have also proved through a large number of experiments that as the battery ages, the R...

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Abstract

The invention discloses a battery modeling method based on a Simscape platform. The battery modeling method comprises the following steps: extracting parameters in an equivalent circuit model by an HPPC (Hybrid Pulse Power Characterization) test; carrying out a battery road drive cycle ageing test, testing battery capacity and ohmic internal resistance after each cycle; establishing each circuit module in the equivalent circuit model based on the Simscape platform; establishing battery cell sub models according to each established circuit module; connecting the battery cell sub models in parallel to establish single-section battery sub models; connecting the single-section battery sub models in series to establish a battery pack integral module; and setting ageing factors of each battery cell sub model in the battery pack integral module. According to the battery modeling method based on the Simscape platform disclosed by the invention, modeling precision is higher than that of electric car simulation software ADVISOR which is commonly used at present. The modeling method based on the Simscape platform provides a novel thought and a novel method for modeling in the future, and has the advantages of being simple in modeling and strong in flexibility.

Description

technical field [0001] The invention relates to a modeling method, in particular to a battery modeling method based on a Simscape platform. Background technique [0002] With the popularity of electric vehicles, safety issues have attracted more and more attention. The safety issue of electric vehicles is ultimately the safety of power batteries. Electric vehicle power battery packs are generally composed of multiple single cells. Due to the inconsistency of single cells , will lead to overcharge and overdischarge of some single cells during the use of the battery pack, causing safety problems for electric vehicles. [0003] Electric vehicle power battery packs are generally composed of multiple single cells connected in parallel and in series. Due to the differences between different single cells, the performance of the battery pack is far lower than the original level of the single cells. The difference between the single cells Increases with age of the battery pack. Due...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 程勇王丽梅
Owner SHANDONG UNIV
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