High-frequency discharge storage battery internal resistance online detection method

A detection method and high-frequency discharge technology, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., to achieve online detection, overcome irreversible damage, and achieve continuous real-time measurement of battery internal resistance.

CN111142037APending Publication Date: 2020-05-12许昌中科森尼瑞技术有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2020-05-12

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Abstract

The invention discloses a high-frequency discharge storage battery internal resistance online detection method. A detection system comprises a storage battery and a controller; the storage battery isconnected with an ADC sampling circuit; and two ends of the storage battery are connected with a discharge loop. The on-line detection method comprises the steps of: sampling voltage and recording waveform; turning on a discharge loop; adjusting a control switch S2 to discharge; obtaining discharge sampling result data; executing an internal resistance analysis algorithm; and obtaining an internalresistance analysis result. The method is brand new and efficient. The defects of a traditional internal resistance measurement method are overcome; irreversible damage to the battery caused by large-current discharge is avoided; measurement errors caused by electromotive force change of the storage battery in a discharge method are avoided; noise interference of part of a charger is eliminated,and online detection is realized; the difficulty of the real-time detection of the internal resistance of the storage battery is overcome; and the continuous real-time measurement of the internal resistance of the storage battery is realized.
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Description

technical field

[0001] The invention belongs to the technical field of battery internal resistance detection, and in particular relates to an online detection method for high-frequency discharge battery internal resistance. Background technique

[0002] As the most important energy storage carrier in modern society, batteries are used in all aspects of our lives. The safety of batteries has received widespread attention. As the most important parameter of the battery, the internal resistance reflects the performance and health status of the battery. It is of great significance to accurately measure the internal resistance of the battery, especially the online measurement of the internal resistance of the battery.

[0003] There are many difficulties in the measurement of battery internal resistance. First of all, the internal resistance value is generally only a few milliohms, which requires very precise measurement techniques or ingenious measurement methods. Second, th...

Examples

Embodiment Construction

[0035] Specific examples are given below to further describe the technical solution of the present invention in a clear, complete and detailed manner. This embodiment is the best embodiment on the premise of the technical solution of the present invention, but the protection scope of the present invention is not limited to the following embodiments.

[0036] An online detection method for the internal resistance of a high-frequency discharge storage battery, the detection system used in the online detection method includes a storage battery and a controller, such as figure 1 Shown is a schematic diagram of an equivalent circuit of the present invention, the storage battery is connected to an ADC sampling circuit, the two ends of the storage battery are connected with a discharge circuit, the storage battery, the ADC sampling circuit, and the discharge circuit are all connected to the controller, the The controller is equipped with an internal resistance analysis module;

[00...