VOLTAGE DETECTOR

To provide a voltage detector capable of improving stability of an electric connection between a battery pack and a print wiring board than that of conventional ones.SOLUTION: A voltage detector 1 comprises a plurality of connection terminals 12 which are electrically connected to a battery pack 2 in which a plurality of battery cells 21 are serially connected by a plurality of bus bars 22, a voltage detection circuit detecting a voltage of the plurality of battery cells 21 are mounted on a print wiring board 11, and one end is fixed to the print wiring board 11 and the other end is in contact with each bus bar 22. Each of the connection terminals 12 is a coil spring wound so that a radius is different. A plurality of winding parts different in radius are in contact with the bus bar 22.SELECTED DRAWING: Figure 1 【課題】組電池とプリント配線板との電気的接続の安定性を従来よりも向上させることができる電圧検出装置を提供する。【解決手段】電圧検出装置１は、複数の電池セル２１が複数のバスバー２２によって直列接続された組電池２と電気的に接続され、複数の電池セル２１の電圧を検出する電圧検出回路がプリント配線板１１上に実装されており、一端がプリント配線板１１に各々固定されると共に他端がバスバー２２に各々接触する複数の接続端子１２を備え、接続端子１２は、径が異なるように巻回されたコイルばねであり、径が異なる複数の巻回部がバスバー２２に接触する。【選択図】図１