The invention relates to the technical field of charging piles, in particular to a voltage detection circuit and a charging pile. The voltage detection circuit comprises a voltage sampling circuit, a non-linear amplification circuit and a control circuit, the voltage sampling circuit is configured to be electrically connected with the input end of the DC/DC circuit and used for sampling the DC bus voltage to output the sampling voltage, and the non-linear amplification circuit is electrically connected with the voltage sampling circuit and used for outputting the sampling voltage; the nonlinear amplification circuit is used for carrying out nonlinear amplification on the sampling voltage and then outputting target voltage, the target voltage and the sampling voltage are in a nonlinear proportional relation, and the control circuit is electrically connected with the nonlinear amplification circuit and used for detecting the direct-current bus voltage according to the target voltage. According to the embodiment of the invention, through non-linear amplification of the sampling voltage, when the DC bus voltage is different, the amplification times of amplification of the sampling voltage are also different, so that under the same quantization resolution, the voltage detection result of the target voltage section can be ensured to be closer to the actual value, thereby facilitating reduction of the voltage detection error and improvement of the voltage detection precision.
本发明涉及充电桩技术领域,具体涉及一种电压检测电路及充电桩。电压检测电路包括电压采样电路、非线性放大电路及控制电路,电压采样电路被配置为与DC/DC电路的输入端电连接,用于采样直流母线电压以输出采样电压,非线性放大电路与电压采样电路电连接,用于对采样电压进行非线性放大后输出目标电压,目标电压与采样电压之间为非线性比例关系,控制电路与非线性放大电路电连接,用于根据目标电压检测直流母线电压。本实施例通过非线性放大采样电压,直流母线电压不同时,对采样电压进行放大的放大倍数也不同,因此,在同样的量化分辨率下,可以确保目标电压段的电压检测结果更加接近实际值,从而有利于减小电压检测误差,提高电压检测精度。
Voltage detection circuit and charging pile
一种电压检测电路及充电桩
13.05.2025
Patent
Elektronische Ressource
Chinesisch
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