Method and terminal for estimating constant current and constant voltage charging capacity of lithium battery

A technology of constant current, constant voltage, and constant voltage charging, applied in the measurement of electrical variables, measurement of electricity, measurement devices, etc., can solve the problems of high data sampling requirements, high hardware costs, and high program complexity, reducing data sampling requirements, The effect of reducing software complexity or hardware implementation costs

Active Publication Date: 2022-02-22
UNIV OF JINAN
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Problems solved by technology

[0004] The technical problem mainly solved by the present invention is to provide a lithium battery constant current and constant voltage charging capacity estimation method and terminal, which can solve the high data sampling requirements, high program complexity or hardware cost faced by the lithium battery management system in terms of charging capacity estimation. high problem

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  • Method and terminal for estimating constant current and constant voltage charging capacity of lithium battery
  • Method and terminal for estimating constant current and constant voltage charging capacity of lithium battery
  • Method and terminal for estimating constant current and constant voltage charging capacity of lithium battery

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Embodiment Construction

[0028] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0029] The embodiment of the present invention discloses a lithium battery constant current and constant voltage charging capacity estimation method and terminal, which can reduce the data sampling requirements for real-time current and reduce the software complexity of the battery management system under the premise of ensuring the estimation accuracy of the charging capacity degree or hardware implementation cost. Each will be described ...

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Abstract

The invention discloses a lithium battery constant current and constant voltage charging capacity estimation method and terminal, wherein the charging capacity estimation method estimates the charging capacity for the constant current and constant voltage charging scheme of the lithium battery, and obtains the constant current charging time length, constant voltage charging time and constant voltage by timing. The charging time and an instantaneous current sampling at a specific moment in the constant-voltage charging phase can estimate the constant-current and constant-voltage charging capacity. Through the above method, the present invention can reduce the data sampling requirement for real-time current and reduce the software complexity or hardware implementation cost of the battery management system under the premise of ensuring the estimation accuracy of the charging capacity.

Description

technical field [0001] The invention relates to the field of lithium battery power management, in particular to a method for estimating the constant current and constant voltage charging capacity of a lithium battery and a terminal. Background technique [0002] Lithium batteries require a battery management system to monitor their charging and discharging process and keep the temperature within a reasonable range. Among them, monitoring and measuring the amount of charge in each charging process of the lithium battery is an important task of the battery management system. Charging power estimation usually adopts the ampere-hour method / coulomb-counting method (Coulomb-Counting). The charging power is obtained by sampling the charging current in real time during the battery charging process and integrating it with time. Correspondingly, in the battery management system, the security method can be implemented by software or by a dedicated chip. The software implementation me...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/3828
CPCG01R31/3828
Inventor 刘海宁李发家杨奉钦宋方臻刘成良
Owner UNIV OF JINAN
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