Model parameter calculation method and device for single battery, and medium
A single battery and model parameter technology, which is applied in the direction of calculation, measurement devices, electrical digital data processing, etc., can solve problems such as inconsistent performance, difficulty in understanding the operating status of single batteries, and inability to accurately reflect the operating status of battery modules. Reach the effect of reducing the operating load, reducing the amount of calculation, and reliable data base
Active Publication Date: 2021-04-30
HUMAN HORIZONS (JIANGSU) TECH CO LTD
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Problems solved by technology
[0004]
However, in the process of implementing the present invention, the inventors found that the prior art has at least the following problems: Due to the differences in the manufacturing and use process, a large number of single batteries in the battery module will inevitably have inconsistent performance
However, the performance inconsistency of single cells has a relatively large impact on the dynamic characteristics and performance of the entire battery module. If only the parameter information of the average equivalent model of the battery module is estimated, it is difficult to know the operating status of each single cell, so that it is impossible to Accurately reflect the operating status of the entire battery module, and cannot provide a reliable basis for scenarios such as vehicle fault diagnosis
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[0071] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0072] see figure 1 , is a schematic flowchart of steps of a method for calculating model parameters of a single battery provided in Embodiment 1 of the present invention. A method for calculating model parameters of a single battery provided in an embodiment of the present invention is performed through steps S1 to S2:
[0073] S1. Calculate the average model parameter set of the battery module according to the average equivalent model of the battery module;
[...
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The invention discloses a model parameter calculation method and device for a single battery and a medium, and the method comprises the steps: calculating an average model parameter group of a battery module according to an average equivalent model of the battery module; constructing a single battery equivalent model of the battery module; and calculating a model parameter group of each single battery in the battery module according to the average model parameter group and a discretization equation of a single battery equivalent model of the battery module. By adopting the embodiment of the invention, the model parameter of each single battery in the battery module can be accurately calculated, and the efficiency of calculating the model parameter of the single battery is effectively improved.
Description
technical field [0001] The invention relates to the technical field of batteries, in particular to a method, device and medium for calculating model parameters of a single battery. Background technique [0002] Due to its high energy density, long cycle life, and low self-discharge rate, lithium-ion batteries have gradually become the most widely used type of power battery for electric vehicles. In order to meet the long battery life and high power requirements of electric vehicles, the vehicle-mounted lithium-ion power battery module is usually composed of several single batteries connected in series. [0003] During the use of the car, it is necessary to monitor the operating status of the battery module. In the prior art, the parameter information of the battery module is usually identified by establishing an average equivalent model of the battery module, so as to monitor the operating state of the battery module. [0004] However, during the process of implementing th...
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IPC IPC(8): G06F30/367G01R31/396G01R31/367
CPCG06F30/367G01R31/396G01R31/367Y02E60/10
Inventor 李展
Owner HUMAN HORIZONS (JIANGSU) TECH CO LTD