Patent ID: 11899073
Assignee: MINTECH CO., LTD
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 0:
1. An impedance measurement device comprising:
an electrochemical energy device;
an amplifier connected to each connection terminal of the electrochemical energy device and configured to remove a DC signal of a signal introduced through a wiring, allow an AC signal of the signal to pass therethrough, and amplify and provide the AC signal;
a main board configured to receive the AC signal from the amplifier and measure an impedance of the AC signal, and
wherein the amplifier comprises,
a DC blocking portion configured to remove a DC signal of a signal of a power applied from the electrochemical energy device and allow an AC signal of the signal to pass therethrough;
a first amplifier configured to be disposed close to the connection terminal of the electrochemical energy device to not amplify a common mode noise introduced through the wiring and to amplify the AC signal; and
a second amplifier configured to be isolated from the first amplifier and to provide the signal amplified by the first amplifier to the main board.