The invention discloses a connecting device and connecting structure for high-
voltage battery modules in an electric automobile. The connecting device comprises an upper cover plate of the device, a low-
voltage connecting module, a high-
voltage copper bar connecting module and a lower cover plate of the device, wherein the low-voltage connection module comprises a low-voltage wire harness
assembly and a flexible circuit board
assembly; and the high-voltage
copper bar connecting module comprises a high-voltage
copper bar, a copper bar temperature sensor for detecting the temperature of the high-voltage copper bar is arranged on the high-voltage copper bar, and the copper bar temperature sensor is electrically connected with the flexible circuit board
assembly. According to the invention, through concentrated wiring, the wiring lengths of the high-voltage copper bar and low-voltage wire harnesses are reduced, the wiring disorder of the high-voltage copper bar and the low-voltage wire harnesses is avoided, the space
utilization rate of an internal circuit of the
power battery is increased, a scheme is provided for
production automation, the external packaging cost of the high-voltage
busbar and the low-voltage wire harnesses is reduced, a connection path is optimized, and a design scheme is provided for modularization and platformization.