US-20260128682-A1 - DRIVE DEVICE FOR DRIVING MOTOR AND OPERATING METHOD THEREOF

US20260128682A1US 20260128682 A1US20260128682 A1US 20260128682A1US-20260128682-A1

Abstract

Provided are a drive device for driving a motor and an operating method for the drive device. The drive device includes a battery module, a conversion circuit, an energy storage circuit, and a control switch. The conversion circuit is coupled to the motor, a first power terminal of the battery module, and a second power terminal of the battery module. The control switch is coupled in series with the energy storage circuit between the first power terminal and the second power terminal. When a voltage value at the first power terminal is higher than a first setting voltage value, the drive device turns on the control switch to enable the energy storage circuit to store electrical energy at the first power terminal.

Inventors

Jyh-Wei Chen
Hsiu-Hsien Su
Yun-Chi Tzeng

Assignees

APH EPOWER CO., LTD.

Dates

Publication Date: 20260507
Application Date: 20250521
Priority Date: 20241104

Claims (18)

1 . A drive device for driving a motor, comprising: a battery module; a conversion circuit coupled to the motor, a first power terminal of the battery module, and a second power terminal of the battery module; an energy storage circuit; and a control switch coupled in series with the energy storage circuit between the first power terminal and the second power terminal, wherein in response to the voltage value at the first power terminal being higher than a first setting voltage value, the drive device turns on the control switch to enable the energy storage circuit to store electrical energy at the first power terminal.
2 . The drive device as claimed in claim 1 , wherein the energy storage circuit comprises: a first switch, wherein a first terminal of the first switch is coupled to the first power terminal; and an energy storage battery coupled between a second terminal of the first switch and the control switch.
3 . The drive device as claimed in claim 2 , wherein in response to the voltage value at the first power terminal being higher than the first setting voltage value, the drive device turns on the control switch and the first switch.
4 . The drive device as claimed in claim 2 , further comprising: a second switch, wherein a first terminal of the second switch is coupled to the first power terminal; and a resistor coupled between a second terminal of the second switch and the control switch.
5 . The drive device as claimed in claim 4 , wherein in response to the voltage value at the first power terminal being higher than a second setting voltage value, the drive device turns on the control switch, the first switch, and the second switch, and the second setting voltage value is higher than the first setting voltage value.
6 . The drive device as claimed in claim 5 , wherein in response to the voltage value at the first power terminal being higher than the second setting voltage value and a current value of a charging current flowing through the energy storage battery being higher than a setting current value, the drive device turns on the control switch, the first switch, and the second switch.
7 . The drive device as claimed in claim 5 , wherein during a period when the control switch, the first switch, and the second switch are turned on, in response to a time duration that a current value of a charging current flowing through the energy storage battery is higher than a setting current value being greater than a setting time duration, the drive device turns on the control switch and the second switch, and turns off the first switch.
8 . The drive device as claimed in claim 5 , wherein during a period when the control switch, the first switch, and the second switch are turned on, in response to the voltage value at the first power terminal being higher than a third setting voltage value, the drive device turns on the control switch and the second switch, and turns off the first switch, and the third setting voltage value is higher than the second setting voltage value.
9 . The drive device as claimed in claim 1 , wherein the battery module is implemented by an aluminum-ion battery.
10 . An operating method for a drive device, wherein the drive device is for driving a motor, the drive device comprises a battery module, a conversion circuit, an energy storage circuit, and a control switch, the conversion circuit is coupled to the motor, a first power terminal of the battery module, and a second power terminal of the battery module, the control switch is coupled in series with the energy storage circuit between the first power terminal and the second power terminal, and the operating method comprises: receiving a voltage value at the first power terminal; and in response to the voltage value at the first power terminal being higher than a first setting voltage value, turning on the control switch to enable the energy storage circuit to store electrical energy at the first power terminal.
11 . The operating method as claimed in claim 10 , wherein the energy storage circuit comprises: a first switch, wherein a first terminal of the first switch is coupled to the first power terminal; and an energy storage battery coupled between a second terminal of the first switch and the control switch.
12 . The operating method as claimed in claim 11 , further comprising: in response to the voltage value at the first power terminal being higher than the first setting voltage value, turning on the control switch and the first switch.
13 . The operating method as claimed in claim 11 , wherein the energy storage circuit further comprises: a second switch, wherein a first terminal of the second switch is coupled to the first power terminal; and a resistor coupled between a second terminal of the second switch and the control switch.
14 . The operating method as claimed in claim 13 , further comprising: in response to the voltage value at the first power terminal being higher than a second setting voltage value, turning on the control switch, the first switch, and the second switch, wherein the second setting voltage value is higher than the first setting voltage value.
15 . The operating method as claimed in claim 14 , further comprising: in response to the voltage value at the first power terminal being higher than the second setting voltage value and a current value of a charging current flowing through the energy storage battery being higher than a setting current value, turning on the control switch, the first switch, and the second switch.
16 . The operating method as claimed in claim 14 , further comprising: during a period when the control switch, the first switch, and the second switch are turned on, in response to a time duration that a current value of a charging current flowing through the energy storage battery is higher than a setting current value being greater than a setting time duration, turning on the control switch and the second switch, and turning off the first switch.
17 . The operating method as claimed in claim 14 , further comprising: during a period when the control switch, the first switch, and the second switch are turned on, in response to the voltage value at the first power terminal being higher than a third setting voltage value, turning on the control switch and the second switch, and turning off the first switch, wherein the third setting voltage value is higher than the second setting voltage value.
18 . The operating method as claimed in claim 10 , wherein the battery module is implemented by an aluminum-ion battery.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application claims the priority benefit of Taiwan application serial no. 113142163, filed on Nov. 4, 2024. The entirety of the above-mentioned patent application is hereby incorporated by reference herein and made a part of this specification. BACKGROUND Technical Field The disclosure relates to a drive device and an operating method for the drive device, and particularly relates to a drive device for driving a motor and an operating method for the drive device. Related Art The drive device includes a battery module and a conversion circuit. The conversion circuit may provide electrical energy stored in the battery module to the motor. The motor is driven according to the electrical energy. When the motor decelerates or brakes, the motor provides a back electromotive force. The conversion circuit recovers the electrical energy of the back electromotive force to the battery module. It should be noted that when the electrical energy of the back electromotive force is too large, the battery module may not be able to withstand the voltage value of the back electromotive force and may be damaged. Similarly, the power switch of the conversion circuit may not be able to withstand the voltage value of the back electromotive force and may be damaged. Therefore, when the motor decelerates or brakes, how to protect the drive device to extend the service life of the drive device is one of the research focuses of persons skilled in the art. SUMMARY The disclosure provides a drive device for driving a motor and an operating method for the drive device, which can reduce the risk of damage to the drive device from the electrical energy from the motor. In an embodiment of the disclosure, the drive device of the disclosure is for driving a motor. The drive device includes a battery module, a conversion circuit, an energy storage circuit, and a control switch. The conversion circuit is coupled to the motor, a first power terminal of the battery module, and a second power terminal of the battery module. The control switch is coupled in series with the energy storage circuit between the first power terminal and the second power terminal. When a voltage value at the first power terminal is higher than a first setting voltage value, the drive device turns on the control switch to enable the energy storage circuit to store electrical energy at the first power terminal. In an embodiment of the disclosure, the operating method is for a drive device. The drive device is for driving a motor. The drive device includes a battery module, a conversion circuit, an energy storage circuit, and a control switch. The conversion circuit is coupled to the motor, a first power terminal of the battery module, and a second power terminal of the battery module. The control switch is coupled in series with the energy storage circuit between the first power terminal and the second power terminal. The operating method includes the following. A voltage value is received at the first power terminal. Also, when the voltage value at the first power terminal is higher than a first setting voltage value, the control switch is turned on to enable the energy storage circuit to store electrical energy at the first power terminal. Based on the above, when the voltage value at the first power terminal is higher than a first setting voltage value, the drive device turns on the control switch to enable the energy storage circuit to store the electrical energy at the first power terminal. Therefore, when the voltage value at the first power terminal is too high, the energy storage circuit stores the electrical energy at the first power terminal to reduce the risk of damage to the drive device from the electrical energy at the first power terminal. In this way, the service life of the drive device can be extended. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of a drive device according to an embodiment of the disclosure. FIG. 2 is a schematic diagram of a drive device according to an embodiment of the disclosure. FIG. 3 is a schematic diagram of a drive device according to an embodiment of the disclosure. FIG. 4 is a flowchart of an operating method according to an embodiment of the disclosure. DESCRIPTION OF THE EMBODIMENTS Some embodiments of the disclosure will be described in detail with reference to the accompanying drawings. In the following description, when the same reference numerals appear in different drawings, the reference numerals will be regarded as the same or similar elements. These embodiments are merely a part of the disclosure and do not disclose all possible implementations of the disclosure. More precisely, these embodiments are merely examples within the scope of the appended claims of the disclosure. Please refer to FIG. 1, which is a schematic diagram of a drive device according to an embodiment of the disclosure. In this embodiment, a drive device 100 is for driving a motor MTR.