The invention relates to the technical field of charging piles, in particular to a current detection circuit and a charging pile. The current detection circuit comprises a current sampling circuit, a segmented amplification circuit and a control circuit, the current sampling circuit is configured to be electrically connected with the output end of the DC/DC circuit and used for sampling the current of the output end of the DC/DC circuit and outputting a sampling voltage, and the segmented amplification circuit is electrically connected with the current sampling circuit and used for amplifying the sampling voltage according to a target amplification stage; outputting the amplified target voltage; the target amplification stage corresponds to the sampling voltage, and the control circuit is electrically connected with the current sampling circuit and the segmented amplification circuit and is used for detecting the output end current of the DC/DC circuit according to the target detection mode and the target voltage; the target detection mode corresponds to the sampling voltage. According to the embodiment of the invention, the current can be sampled in a segmented manner, different gains are adopted for amplification for different current sections, and the sampling precision of the target current section can be improved on the basis of avoiding the sampling cut-off problem.
本发明涉及充电桩技术领域,具体涉及一种电流检测电路及充电桩。电流检测电路包括电流采样电路、分段放大电路及控制电路,电流采样电路被配置为与DC/DC电路的输出端电连接,用于采样DC/DC电路的输出端电流并输出采样电压,分段放大电路与电流采样电路电连接,用于根据目标放大阶段对采样电压进行放大,输出放大后的目标电压;目标放大阶段与采样电压对应,控制电路分别与电流采样电路及分段放大电路电连接,用于根据目标检测模式及目标电压检测DC/DC电路的输出端电流;目标检测模式与采样电压对应。本实施例能够分段采样电流,针对不同电流区间段采用不同的增益进行放大,能够在避免出现采样截止的问题的基础上提高目标电流区间段的采样精度。
Current detection circuit and charging pile
一种电流检测电路及充电桩
2025-05-13
Patent
Electronic Resource
Chinese
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