In an electronic system, for example, a solar photovoltaic assembly, communication assembly, etc., for transmitting a micro electric signal, it is necessary to transmit the micro electric signal to an electrical device disposed inside a connection box through a conductive sheet (bus bar) so as to collect or retransmit the micro electric signal. Inside the connection box, a conductive terminal for electrically connecting the conductive sheet and a connection piece connected between the conductive terminal and the electrical device are disposed.
With respect to FIG. 1, a conventional connection box 200 is shown and includes a housing 201, a conductive terminal 203 and a conductive sheet 204 (i.e. bus bar). A cable receiving passageway is formed in the housing 201 to introduce an external cable 202 therein. The conductive terminal 203 is electrically connected to the introduced cable 202 by, for example, soldering. The conductive sheet 204 is connected between the conductive terminal 203 and an electrical device (not shown), for example, a solar photovoltaic assembly. The conductive sheet 204 is made of a thin metal material, for example, a copper foil, and is soldered to the conductive terminal 203. Since the conductive sheet 204 is very thin, there is a possibility that a rosin joint occurs between the conductive sheet 204 and the conductive terminal 203 during soldering them, which may cause a poor electrical contact and an unstable electrical connection between them.
Furthermore, it may produce an over high contact impendence and even an electric arc between them, which creates a serious potential safety risk. Also, soldering the conductive sheet 204 to the conductive terminal 203 is very complicated and difficult, and it is difficult for them to be separated after the soldering, which is unfavorable for maintenance of the solar panel of the solar photovoltaic assembly.