Second-order and multi-order battery equivalent circuit model construction method applied to constant-voltage working condition
A technology of equivalent circuit model and construction method, which is applied in special data processing applications, electrical digital data processing, instruments, etc., can solve the problems of not being able to simulate the dynamic characteristics of battery charging current well, so as to improve the accuracy of current estimation and reduce the Effects of workload, precise research and control
Active Publication Date: 2019-12-27
JIANGSU UNIV
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Problems solved by technology
In the constant voltage operation condition, the terminal voltage of the battery is a constant value, and the equivalent circuit model based on the existing resistance-capacitance network cannot simulate the dynamic characteristics of the charging current of the battery at this time.
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[0035] Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.
[0036] The embodiment of the present invention provides a second-order and multi-order battery equivalent circuit model construction method applied to the constant voltage condition, which is used to characterize the dynamic characteristics of the load current of the battery under the constant voltage condition, so as to realize the accurate calculation of the battery Research.
[0037] A second-order battery equivalent circuit model constructi...
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The invention discloses a second-order and multi-order battery equivalent circuit model construction method applied to a constant-voltage working condition. The method comprises the following steps: constructing an equivalent circuit model of a battery under the constant-voltage working condition; utilizing the equivalent circuit model of the battery to create an analyzed mathematical equation fordetermining parameters in the battery model; wherein the equivalent circuit model comprises a voltage source used for representing the open-circuit voltage of the battery, and the negative electrodeof the voltage source is connected with the negative electrode of the voltage output end of the model end; and the current dynamic characteristic simulation circuit is connected with the positive electrode of the voltage source and is also connected with the positive electrode of the model end voltage output end. According to the battery equivalent circuit model in the embodiment of the invention,the analyzed mathematical equation can be written, and the current characteristics of the battery under the constant-voltage working condition can be expressed more accurately, so that more accurateand deep research on the battery is realized.
Description
technical field [0001] The invention relates to the field of battery technology, in particular to a method for constructing a second-order and multi-order battery equivalent circuit model applied to a constant voltage working condition. Background technique [0002] Typically, the electrochemical reaction characteristics of a battery can be described by a model. Specifically, the battery model can be divided into black box model, electrochemical model and equivalent circuit model. Compared with the black box model and electrochemical model, the equivalent circuit model with electrical components such as resistors and capacitors as the core has better comprehensive performance in terms of model structure complexity and voltage prediction accuracy, and is widely used in new energy vehicles, In battery management systems in the fields of energy storage equipment, portable electronic equipment and space technology. [0003] The equivalent circuit model in the prior art basical...
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Login to View More IPC IPC(8): G06F17/50
CPCY02T10/70
Inventor 杨驹丰蔡英凤盘朝奉王丽梅裴磊
Owner JIANGSU UNIV