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

Patent metadata

Field	Value
Publication number	US-12485797-B2
Application number	US-202418596661-A
Country	US
Kind code	B2
Filing date	Mar 6, 2024
Priority date	Mar 9, 2022
Publication date	Dec 2, 2025
Grant date	Dec 2, 2025

Abstract

Provided are a power battery voltage regulation circuit and system, and a control method and a control apparatus therefor. The power battery voltage regulation circuit includes a power module, a heating module, a charge/discharge interface, and a voltage regulation switch assembly, wherein 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 used for regulating, in response to a control signal, a charge/discharge voltage between the external charge/discharge device and the power module.

First claim

What is claimed is:

1 . A power battery voltage regulation circuit, comprising a power module, a heating module, a charge/discharge interface, and a voltage regulation switch assembly, wherein
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.

2 . The regulation circuit according to claim 1 , wherein the switch module comprises a charge/discharge switching module and a bridge arm group connected in parallel, a first end of the energy storage element being connected to the bridge arm group and a second end of the energy storage element being connected to the charge/discharge switching module.

3 . The regulation circuit according to claim 2 , wherein the energy storage element comprises an M-phase motor; the bridge arm group comprises M phases of bridge arms, M being a positive integer; M phases of windings of the M-phase motor are connected to upper and lower bridge arm connection points of phases of bridge arm of the M phases of bridge arms on a one-to-one corresponding basis, respectively; and
the charge/discharge switching module comprises a first switching circuit and a second switching circuit connected in series, a connection point of the first switching circuit with the second switching circuit being connected to a neutral point of the M-phase motor.

4 . The regulation circuit according to claim 3 , wherein the first switching circuit and the second switching circuit each comprise a triode and a flyback diode connected in parallel.

5 . The regulation circuit according to claim 3 , wherein the first switching circuit and the second switching circuit each comprise a triode or a relay switch.

6 . The regulation circuit according to claim 3 , wherein the first switching circuit comprises a diode and the second switching circuit comprises a switch; or the first switching circuit comprises a switch and the second switching circuit comprises a diode.

7 . The regulation circuit according to claim 1 , wherein the power module is connected with a first voltage stabilizing capacitor in parallel at the two ends and the charge/discharge interface is connected with a second voltage stabilizing capacitor in parallel at the two ends.

8 . The regulation circuit according to claim 1 , wherein currents flowing through all the windings of the motor are of equal magnitude and in the same phase.

9 . 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

Assignees

• Contemporary Amperex Technology Hong Kong Ltd

Inventors

• Zhao Yuanmiao
• Huang Xiaojian
• Li Zhanliang
• Yan Yu
• Chen Xinwei
• Dan Zhimin

Classifications

• H02J7/875

  Charging or discharging for charge maintenance, battery initiation or rejuvenation · CPC title

• H02J7/865

  Battery or charger load switching, e.g. concurrent charging and load supply (H02J7/50 takes precedence) · CPC title

• H02J7/96

  in response to battery voltage · CPC title

• H02J7/80

  including monitoring or indicating arrangements · CPC title

• H02J7/50

  acting upon multiple batteries simultaneously or sequentially · CPC title