Low noise constant current discharge circuit

By designing a low-noise constant current discharge circuit, including adjustment tubes, DC sensors, differential amplifier modules, follower modules and optocouple isolation modules, the battery noise testing problem caused by high noise in the charging and discharging circuit is solved, and higher test accuracy is achieved and battery performance evaluation.

CN110780216BActive Publication Date: 2025-01-07NEWARE TECH LTD
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Patent Information

Application Number
CN201911200783.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2019-11-29
Publication Date
2025-01-07
Estimated Expiration
2039-11-29

AI Technical Summary

Technical Problem

Generally, the charge and discharge circuit is very noisy, which causes the battery to be connected in parallel at both ends of the charge and discharge circuit when testing noise. The noise signal measured by the noise test system is mainly the charge and discharge circuit noise signal, which cannot effectively evaluate the battery noise.

Method used

A low-noise constant current discharge circuit is designed, including a adjustment tube, a DC sensor, a differential amplifier module, a follower module and an optocouple isolation module. These components effectively reduce noise interference and improve the accuracy of the test signal.

Benefits of technology

The low-noise constant current discharge circuit has a simple structure, high stability and high accuracy, effectively reducing mutual radiation interference between functional modules, improving the accuracy of test results, and being able to more accurately evaluate battery performance.

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Abstract

The present invention provides a low-noise constant-current discharge circuit, comprising an adjustment tube, a DC sensor, a differential amplifier module, a follower module, and an optocoupler isolation module. The present invention has the following beneficial effects: the low-noise constant-current discharge circuit has a simple structure, good stability, and high precision; it effectively reduces the mutual radiation interference between functional modules and improves the accuracy of the test results; the battery is discharged using the low-noise constant-current discharge circuit to evaluate the performance of the battery and obtain the best working mode.
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Citation Information

Patent Citations

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  • Low-noise constant-current discharge circuit

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