Power battery voltage regulation circuit and system, and control method and control apparatus therefor

An electrical device, comprising a control module and a power battery voltage regulation circuit, wherein

• the power battery voltage regulation circuit comprises a power module, a heating module, a charge/discharge interface, and a voltage regulation switch assembly, the heating module comprises an energy storage element and a switch module;
• the power module comprises at least a first power battery and a second power battery;
• the power module is connected in parallel with the switch module;
• and an external charge/discharge device is connected in parallel with the power module through the charge/discharge interface;
• the voltage regulation switch assembly comprises a plurality of switches that are provided between the charge/discharge interface and the power module;
• and the voltage regulation switch assembly and the switch module are for regulating, in response to a voltage regulation control signal, a charge/discharge voltage between the external charge/discharge device and the power module,
• the plurality of switches of the voltage regulation switch assembly further comprises a first switch, a second switch, a third switch, a fourth switch, and a fifth switch;
• the first switch and the third switch are provided on a positive electrode side and a negative electrode side of the charge/discharge interface, respectively;
• the second switch is provided between a positive electrode side of the first power battery and a first end of the switch module;
• the fifth switch is provided between a negative electrode side of the first power battery and a second end of the switch module;
• and the fourth switch is provided between the negative electrode side of the first power battery and a positive electrode side of the second power battery,
• the switch module comprises a charge/discharge switching module and a bridge arm group connected in parallel, one end of the first switch is connected to the positive electrode side of the charge/discharge interface and the other end of the first switch is connected to a first end of the charge/discharge switching module;
• one end of the third switch is connected to the negative electrode side of the charge/discharge interface and the other end of the third switch is connected to a second end of the charge/discharge switching module;
• one end of the second switch is connected to the positive electrode side of the first power battery and the other end of the second switch is connected to all upper bridge arms of the bridge arm group in a common line;
• and one end of the fifth switch is connected to the negative electrode side of the first power battery, and the other end of the fifth switch, all lower bridge arms of the bridge arm group, and the second end of the charge/discharge switching module are connected in a common line, the positive electrode side of the second power battery is further connected to the first end of the charge/discharge switching module,
• the control module is connected to the switch module and the voltage regulation switch assembly and is used for controlling the voltage regulation switch assembly and the switch module to regulate the charge/discharge voltage between the external charge/discharge device and the power module.

A power battery voltage regulation system, comprising an external charge/discharge device and an electrical device, wherein, the electrical device comprises a control module and a power battery voltage regulation circuit,

• the power battery voltage regulation circuit comprises a power module, a heating module, a charge/discharge interface, and a voltage regulation switch assembly, the heating module comprises an energy storage element and a switch module;
• the power module comprises at least a first power battery and a second power battery;
• the power module is connected in parallel with the switch module;
• and an external charge/discharge device is connected in parallel with the power module through the charge/discharge interface;
• the voltage regulation switch assembly comprises a plurality of switches that are provided between the charge/discharge interface and the power module;
• and the voltage regulation switch assembly and the switch module are for regulating, in response to a voltage regulation control signal, a charge/discharge voltage between the external charge/discharge device and the power module,
• the plurality of switches of the voltage regulation switch assembly further comprises a first switch, a second switch, a third switch, a fourth switch, and a fifth switch;
• the first switch and the third switch are provided on a positive electrode side and a negative electrode side of the charge/discharge interface, respectively;
• the second switch is provided between a positive electrode side of the first power battery and a first end of the switch module;
• the fifth switch is provided between a negative electrode side of the first power battery and a second end of the switch module;
• and the fourth switch is provided between the negative electrode side of the first power battery and a positive electrode side of the second power battery,
• the switch module comprises a charge/discharge switching module and a bridge arm group connected in parallel, one end of the first switch is connected to the positive electrode side of the charge/discharge interface and the other end of the first switch is connected to a first end of the charge/discharge switching module;
• one end of the third switch is connected to the negative electrode side of the charge/discharge interface and the other end of the third switch is connected to a second end of the charge/discharge switching module;
• one end of the second switch is connected to the positive electrode side of the first power battery and the other end of the second switch is connected to all upper bridge arms of the bridge arm group in a common line;
• and one end of the fifth switch is connected to the negative electrode side of the first power battery, and the other end of the fifth switch, all lower bridge arms of the bridge arm group, and the second end of the charge/discharge switching module are connected in a common line, the positive electrode side of the second power battery is further connected to the first end of the charge/discharge switching module,
• the control module is connected to the switch module and the voltage regulation switch assembly and is used for controlling the voltage regulation switch assembly and the switch module to regulate the charge/discharge voltage between the external charge/discharge device and the power module,
• the external charge/discharge device is connected to the charge/discharge interface in the electrical device.