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Battery capacity prediction method and device, terminal and computer readable storage medium

A battery capacity and prediction method technology, applied in the direction of measuring devices, measuring electrical variables, measuring electricity, etc., can solve the problems of long prediction time and insufficient prediction accuracy

Pending Publication Date: 2020-12-08
UNITED AUTOMOTIVE ELECTRONICS SYST
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The embodiment of the present application provides a battery capacity prediction method, device and terminal to solve the problems existing in the existing battery capacity estimation methods such as long prediction time and insufficient prediction accuracy

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  • Battery capacity prediction method and device, terminal and computer readable storage medium
  • Battery capacity prediction method and device, terminal and computer readable storage medium
  • Battery capacity prediction method and device, terminal and computer readable storage medium

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Embodiment Construction

[0027] The specific embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0028] The applicant found that when the lithium-ion battery is switched from the working state to the open circuit state, that is, after the current is unloaded, the physical and chemical processes inside the battery will not end immediately with the switching of the current. Therefore, the external voltage of the battery will go through a long-term terminal voltage change process before entering a stable state. The voltage change from the moment when the current is unloaded (that is, the open-circuit state) to the open-circuit stable state is the relaxation voltage of the battery. Discharge process, charge and discharge conditions and temperature and other factors. The present application utilizes a short period of standing (that is, standing open circuit voltage OCV) process after charging or discharging the battery, that is,...

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Abstract

The embodiment of the invention discloses a battery capacity prediction method and device, a terminal and a computer readable storage medium. The method comprises the steps: calculating the time constant of a battery based on a relaxation voltage equivalent model under a set standing experiment condition, and carrying out the linear fitting of the time constant, and obtaining a time parameter; andcalling a capacity time model degree battery under a set standing experiment condition according to the time parameter to predict the battery capacity, thereby obtaining the battery capacity of the battery. By implementing the method, the problems of relatively long prediction duration, relatively low prediction precision and the like in an existing battery capacity prediction method can be solved.

Description

technical field [0001] The present application relates to the field of terminal technology, and in particular to a battery capacity prediction method, device, terminal and computer-readable storage medium. Background technique [0002] Electric vehicles with lithium-ion power batteries as the main power are widely used around the world. A key disadvantage of electric vehicles compared to vehicles with conventional internal combustion engines is the significant aging of commercial lithium-ion batteries with increased operating time, resulting in a degradation of the vehicle's energy and power performance. Considering that the aging phenomenon of lithium-ion is mainly manifested in the attenuation of energy and power performance, most battery life estimation methods choose battery capacity as the characterization parameter of lithium-ion battery life. Battery capacity is an external characteristic of a battery that represents the usable charge stored in the battery. Usually ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/367G01R31/388
CPCG01R31/367G01R31/388
Inventor 肖鹏飞程思底翔
Owner UNITED AUTOMOTIVE ELECTRONICS SYST