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Battery internal resistance measuring method and device, terminal and storage medium

A battery internal resistance and measurement method technology, which is applied in the field of terminals and storage media, battery internal resistance measurement methods, and devices, and can solve problems such as inaccurate battery internal resistance

Pending Publication Date: 2021-02-02
创普斯(深圳)新能源科技集团有限公司
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Problems solved by technology

[0005] In view of this, the present invention provides a method, device, terminal and storage medium for measuring the internal resistance of a battery, which are used to solve the problem that the calculated internal resistance of the battery is not correct due to the influence of the temperature and charge of the battery in the prior art. exact question

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  • Battery internal resistance measuring method and device, terminal and storage medium
  • Battery internal resistance measuring method and device, terminal and storage medium
  • Battery internal resistance measuring method and device, terminal and storage medium

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Embodiment Construction

[0048] 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.

[0049] In order to solve the problem of low accuracy of the measured internal resistance of the battery due to the lack of consideration of the influence of the temperature and the state of charge of the battery on the internal resistance of the battery in the measurement process of the internal resistance of the battery in the traditional technology. In this embodiment, a method for measuring the internal resistance of a battery is proposed. The implementation of ...

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Abstract

The embodiment of the invention discloses a battery internal resistance measuring method. The method comprises the steps of obtaining a first internal resistance value of a sample battery under different states of charge and different temperature conditions, and determining a first corresponding relation between the first internal resistance value and the states of charge and the temperature, determining an actual state of charge and an actual temperature value of the to-be-measured battery, and calculating a second internal resistance value of the to-be-measured battery when the to-be-measured battery performs discharge operation at a preset discharge current, and determining a target internal resistance value of the to-be-measured battery at a preset temperature value based on the secondinternal resistance value, the first corresponding relationship and the actual state of charge. In addition, the embodiment of the invention also discloses a device for measuring the internal resistance of the balanced battery, a terminal and a computer readable storage medium. Errors in battery internal resistance measurement caused by temperature and state of charge can be avoided, and the measurement precision of battery internal resistance is improved.

Description

technical field [0001] The invention relates to the field of batteries, in particular to a method, device, terminal and storage medium for measuring the internal resistance of batteries. Background technique [0002] The battery is an energy device widely used in various fields of life, and the internal resistance of the battery is an important characteristic index used to reflect the performance of the battery. The existing test method for battery internal resistance is: use a certain constant current to discharge the battery, record the open circuit voltage of the battery before and after discharge and make a difference, and use Ohm's law to calculate the DC internal resistance, which is used as the actual first internal resistance of the battery. Resistance. [0003] However, in actual application, since the temperature and charge inside the battery change during the battery discharge process, there is a certain deviation between the first internal resistance value of th...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/389G01R31/387
CPCG01R31/389G01R31/387
Inventor 李伟李严刘明明王齐刚陈浩杨晓伟
Owner 创普斯(深圳)新能源科技集团有限公司
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