A battery switch on circuit comprising a communication control module, a relay, a communication control circuit, a switch and a communication connection terminal, the relay comprising a power input terminal, at least one common contact (D1, D2), at least one first contact (B1, B2), at least one second contact (C1, C2) and a coil for controlling a connection between the at least one common contact and the at least one first contact and a connection between the at least one common contact and the least one second contact based on the voltage at the power input terminal, wherein: the communication control module comprises at least one communication signal terminal (A1, A2) connected to the at least one first contact (B1, B2) of the relay, wherein the at least one common contact (D1, D2) of the relay is connected to at least one communication connection terminal (F1, F2) of the communication connection terminal, wherein the coil of the relay is powered on by a battery power supply at the power input terminal to control a connection between the least one common contact (D1, D2) and the least one first contact (B1, B2) and is powered down by the power input terminal to control a connection between the least one common contact (D1, D2) and the least one second contact (C1, C2), and wherein the communication connection terminal is connected to an upper computer; the switch comprises a first terminal, a second terminal and a control terminal for controlling conduction or disconnection between the first terminal and the second terminal, wherein the first terminal of the switch is connected to the battery power supply, wherein the second terminal of the switch is connected to the power input terminal, and wherein after the power input terminal is powered on, the coil of the relay is powered on by the battery power supply; and the communication control circuit comprises at least one communication input terminal (E1, E2) and a control output terminal, wherein the least one communication input terminal (E1, E2) is connected to the least one second contact (C1, C2) of the relay, and the control output terminal is connected to the control terminal of the switch, wherein when power on is needed, the switch is configured to receive a signal at the control terminal to cause the first terminal and the second terminal to be in conduction with each other. the communication control module comprises at least one communication signal terminal (A1, A2) connected to the at least one first contact (B1, B2) of the relay, wherein the at least one common contact (D1, D2) of the relay is connected to at least one communication connection terminal (F1, F2) of the communication connection terminal, wherein the coil of the relay is powered on by a battery power supply at the power input terminal to control a connection between the least one common contact (D1, D2) and the least one first contact (B1, B2) and is powered down by the power input terminal to control a connection between the least one common contact (D1, D2) and the least one second contact (C1, C2), and wherein the communication connection terminal is connected to an upper computer; the switch comprises a first terminal, a second terminal and a control terminal for controlling conduction or disconnection between the first terminal and the second terminal, wherein the first terminal of the switch is connected to the battery power supply, wherein the second terminal of the switch is connected to the power input terminal, and wherein after the power input terminal is powered on, the coil of the relay is powered on by the battery power supply; and the communication control circuit comprises at least one communication input terminal (E1, E2) and a control output terminal, wherein the least one communication input terminal (E1, E2) is connected to the least one second contact (C1, C2) of the relay, and the control output terminal is connected to the control terminal of the switch, wherein when power on is needed, the switch is configured to receive a signal at the control terminal to cause the first terminal and the second terminal to be in conduction with each other.