CN-121973670-A - Battery management system, control method thereof and electric auxiliary bicycle using battery management system

Abstract

The invention provides a battery management system, a control method thereof and an electric auxiliary bicycle using the same. The battery management system comprises an active pre-stage component, a direct-current voltage conversion circuit, a switching circuit and a microprocessor. The active pre-stage components are connected to a common pin. The switching circuit is connected between the direct-current voltage conversion circuit and the shared pin. The microprocessor is connected to the active pre-stage assembly and the switching circuit. If the shared pin is set to receive a power key signal, the microprocessor controls the switching circuit to be disconnected so as to form a power switch control path between the shared pin and the active front-stage component. If the shared pin is set to output a DC power supply, the microprocessor controls the switching circuit to be conducted so as to form a DC power output path between the shared pin and the DC voltage conversion circuit.

Inventors

• LIN JUNZHOU

Assignees

• 宏碁股份有限公司

Dates

Publication Date

20260505

Application Date

20250228

Priority Date

20241030

Claims (11)

1. 1. A battery management system, comprising: an active pre-stage component connected to a shared pin; The direct-current voltage conversion circuit is connected to a battery power supply output path; a switching circuit connected between the DC voltage conversion circuit and the common pin, and The microprocessor is connected with the active pre-stage component and the switching circuit; wherein if the shared pin is set to receive a power key signal, the microprocessor controls the switching circuit to be disconnected so as to form a power switch control path between the shared pin and the active front-stage component, and If the shared pin is set to output a DC power supply, the microprocessor controls the switching circuit to be conducted so as to form a DC power output path between the shared pin and the DC voltage conversion circuit.
2. 2. The battery management system of claim 1, wherein the switching circuit comprises: A bidirectional blocking switch circuit connected between the DC voltage conversion circuit and the shared pin, and An N-type transistor connected to the bidirectional blocking switch circuit and the microprocessor.
3. 3. The battery management system of claim 2, wherein the bidirectional blocking switching circuit comprises: a first P-type transistor connected to the shared pin; and the second P-type transistor is connected with the first P-type transistor and the direct-current voltage conversion circuit, and the N-type transistor is connected with the grid electrodes of the first P-type transistor and the second P-type transistor.
4. 4. An electric assist bicycle comprising: A power button; A battery, and A battery management system disposed between the power button and the battery, the battery management system comprising: an active pre-stage component connected to a shared pin; The direct-current voltage conversion circuit is connected to a battery power supply output path; A switching circuit connected between the DC voltage conversion circuit and the shared pin; the microprocessor is connected with the active pre-stage component and the switching circuit; the shared pin is set to receive a power key signal, and the microprocessor controls the switching circuit to be disconnected so as to form a power switch control path between the shared pin and the active front-stage component.
5. 5. The electric assist bicycle of claim 4 wherein the switching circuit comprises: A bidirectional blocking switch circuit connected between the DC voltage conversion circuit and the shared pin, and An N-type transistor connected to the bidirectional blocking switch circuit and the microprocessor.
6. 6. The electric assist bicycle of claim 5 wherein the bi-directional blocking switch circuit comprises: a first P-type transistor connected to the shared pin; and the second P-type transistor is connected with the first P-type transistor and the direct-current voltage conversion circuit, and the N-type transistor is connected with the grid electrodes of the first P-type transistor and the second P-type transistor.
7. 7. An electric assist bicycle comprising: A human interface device; A battery, and A battery management system disposed between the human interface device and the battery, the battery management system comprising: an active pre-stage component connected to a shared pin; The direct-current voltage conversion circuit is connected to a battery power supply output path; A switching circuit connected between the DC voltage conversion circuit and the shared pin; the microprocessor is connected with the active pre-stage component and the switching circuit; The sharing pin is set to output a DC power supply, and the microprocessor controls the switching circuit to be conducted so that a DC power output path is formed between the sharing pin and the DC voltage conversion circuit.
8. 8. The electric assist bicycle of claim 7 wherein the switching circuit comprises: A bidirectional blocking switch circuit connected between the DC voltage conversion circuit and the shared pin, and An N-type transistor connected to the bidirectional blocking switch circuit and the microprocessor.
9. 9. The electric assist bicycle of claim 8 wherein the bi-directional blocking switch circuit comprises: a first P-type transistor connected to the shared pin; and the second P-type transistor is connected with the first P-type transistor and the direct-current voltage conversion circuit, and the N-type transistor is connected with the grid electrodes of the first P-type transistor and the second P-type transistor.
10. 10. A control method of a battery management system of an electric assist bicycle, comprising: Setting the battery management system as a first architecture or a second architecture; If the battery management system is set to the first architecture, controlling a battery to be in a transportation mode; If the battery management system is set as the first framework, a switching circuit between a direct-current voltage conversion circuit and a shared pin is disconnected, so that a power switch control path is formed between the shared pin and an active pre-stage component; Disabling a DC power output path between the common pin and the DC voltage conversion circuit if the battery management system is set to the first configuration, and If the battery management system is set to the first architecture, a power button is used to determine whether to turn on the battery.
11. 11. The control method of the battery management system of the electric assist bicycle according to claim 10, further comprising: if the battery management system is set to the second architecture, controlling the battery to be in a standby mode; If the battery management system is set as the second framework, the switching circuit between the direct-current voltage conversion circuit and the shared pin is conducted so that the direct-current power supply output path is formed between the shared pin and the direct-current voltage conversion circuit; Disabling the power switch control path between the shared pin and the active pre-component if the battery management system is set to the second configuration, and If the battery management system is set to the second architecture, a controller area network path is used as a judgment of whether to start the battery.

Description

Battery management system, control method thereof and electric auxiliary bicycle using battery management system Technical Field The present invention relates to an electronic system, a control method thereof and a vehicle using the same, and more particularly to a battery management system, a control method thereof and an electric bicycle using the same. Background In the battery design of the electric auxiliary bicycle, in order to increase an additional output power supply and an external key to trigger a starting function according to the market demands of multiple parties, the number of output pins of the original connector is insufficient. Considering the space size and price cost, the number of pins of the connector cannot be infinitely increased. Accordingly, researchers are working to develop new techniques for enabling the same foot to have a multi-functional use mechanism. Disclosure of Invention The invention relates to a battery management system, a control method thereof and an electric auxiliary bicycle using the same, which utilizes the design of a switching circuit to enable the battery management system to have a first framework and a second framework. Manufacturers do not need to produce two battery management systems with different structures, and can also leave out functional pins to provide more functions. According to an aspect of the present invention, a battery management system is presented. The battery management system comprises an Active Front End (AFE), a direct current voltage conversion circuit, a switching circuit and a microprocessor. The active pre-stage components are connected to a common pin. The DC voltage conversion circuit is connected to a battery power output path. The switching circuit is connected between the direct-current voltage conversion circuit and the shared pin. The microprocessor is connected to the active pre-stage assembly and the switching circuit. If the shared pin is set to receive a power key signal, the microprocessor controls the switching circuit to be disconnected so as to form a power switch control path between the shared pin and the active front-stage component. If the shared pin is set to output a DC power supply, the microprocessor controls the switching circuit to be conducted so as to form a DC power output path between the shared pin and the DC voltage conversion circuit. According to another aspect of the present invention, an electric assist bicycle is provided. The electric auxiliary bicycle comprises a power button, a battery and a battery management system. The battery management system is arranged between the power key and the battery. The battery management system comprises an Active Front End (AFE), a direct current voltage conversion circuit, a switching circuit and a microprocessor. The active pre-stage component is connected to the shared pin. The DC voltage conversion circuit is connected to a battery power output path. The switching circuit is connected between the direct-current voltage conversion circuit and the shared pin. The microprocessor is connected to the active pre-stage assembly and the switching circuit. The shared pin is set to receive a power key signal, and the microprocessor controls the switching circuit to be disconnected so as to form a power switch control path between the shared pin and the active pre-stage component. According to still another aspect of the present invention, an electric assist bicycle is provided. The electric auxiliary bicycle comprises a man-machine interface device, a battery and a battery management system. The battery management system is arranged between the man-machine interface device and the battery. The battery management system comprises an Active Front End (AFE), a direct current voltage conversion circuit, a switching circuit and a microprocessor. The active pre-stage components are connected to a common pin. The DC voltage conversion circuit is connected to a battery power output path. The switching circuit is connected between the direct-current voltage conversion circuit and the shared pin. The microprocessor is connected to the active pre-stage assembly and the switching circuit. The sharing pin is set to output a DC power supply, and the microprocessor controls the switching circuit to be conducted so as to form a DC power output path between the sharing pin and the DC voltage conversion circuit. According to still another aspect of the present invention, a control method of a battery management system of an electric assist bicycle is provided. The control method of the battery management system includes the following steps. The battery management system is set as a first architecture or a second architecture. If the battery management system is set to the first architecture, a battery is controlled to be in a transportation mode. If the battery management system is set as the first structure, a switching circuit between a DC voltage conversion circuit and a shared p