KR-102962989-B1 - APPARATUS OF BATTERY MANAGING AND OPERATING METHOD THEREOF

Abstract

The present invention relates to a battery management device and a method of operation thereof, and is characterized by comprising: a battery cell input terminal connected to a battery to receive power; a communication signal input terminal receiving a communication signal from the outside; a regulator unit that converts power input from the battery into power used internally by the battery management device and provides it; at least one switch that is turned off in the sleep mode of the battery management device; a power line connecting the battery cell input terminal and the regulator unit; and a charge pump that outputs a voltage to turn on the switch using a signal input through the communication signal input terminal.

Inventors

• 이시광

Assignees

• 현대모비스 주식회사

Dates

Publication Date

20260511

Application Date

20220719

Claims (12)

1. Battery cell input terminal connected to the battery to receive power; A communication signal input terminal for receiving a communication signal from the outside; A regulator unit that converts power input from the above battery into power used internally by the battery management device and provides it; A power line connecting the battery cell input terminal and the regulator unit, comprising at least one switch that is turned off in the sleep mode of the battery management device; and It includes a charge pump that outputs a voltage for turning on the switch using a signal input through the communication signal input terminal, The above power line is, A pre-power line including a switch turned on by the charge pump above; and It includes a main power line comprising a switch that is turned on according to the operation of the regulator section by a pre-power supply, and The above-mentioned power line is, A first switch connected to the charge pump and turned on by the charge pump; and A battery management device characterized by including a second switch disposed between the battery cell input terminal and the regulator part, which is turned on according to the turn-on of the first switch.
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4. In paragraph 1, A battery management device characterized in that the regulator unit receives a pre-power supply from the pre-power line, and if the frequency of a signal input through the communication signal input terminal corresponds to a preset frequency, the pre-power supply is converted into a power supply used internally by the battery management device and output.
5. In paragraph 4, The battery management device is characterized by turning on a switch of the main power line when internal power is supplied by the regulator unit, thereby supplying power to the regulator unit by the main power line.
6. In paragraph 5, A battery management device characterized in that, when the above regulator unit receives main power from the above main power line, it converts the main power into power used internally by the battery management device and outputs it.
7. In paragraph 5, The battery management device is characterized by determining whether a signal input through the communication signal input terminal is a wake-up signal, and if it is a wake-up signal, turning on the switch of the main power line.
8. In paragraph 1, A battery management device characterized by the charge pump outputting an amplified voltage using a signal input through the communication signal input terminal.
9. In paragraph 8, A battery management device characterized in that the signal input through the above communication signal input terminal is a differential signal.
10. A step of checking the frequency of a signal input to a communication signal input pin when pre-power is input through a pre-power line between the battery and the regulator; If the signal input to the communication signal input pin corresponds to a preset frequency, the step of converting the prior power into power used internally by the battery management device; and When main power is input through the main power line between the battery and the regulator after a preset standby time has elapsed, the method includes the step of converting the main power into power used internally by the battery management device. The above-mentioned pre-power line includes at least one switch that is turned off in the sleep mode of the battery management device and turned on according to a signal input to the communication signal input pin, The above main power line includes at least one switch that is turned off in the sleep mode of the battery management device and turned on according to the operation of the battery management device by the prior power supply. A method of operation of a battery management device characterized in that the above-mentioned power line includes a first switch that is turned on by a signal input to the communication signal input pin, and a second switch disposed between the battery and the regulator and turned on according to the turning on of the first switch.
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Description

Battery Management Apparatus and Operating Method Thereof The present invention relates to a battery management device and a method of operation thereof, and more specifically, to a wake-up technique for a management device connected to a battery. Batteries are devices that store electrical energy and are employed as power supplies for various electronic devices; in the case of electric vehicles, large-capacity and numerous batteries are installed. Multiple integrated circuits (ICs) may be used to monitor the operation or status of the battery and to ensure its normal functioning. These IC devices may independently constitute a battery management system or be configured as at least a part of a battery management system. For example, in the case of electric vehicles, semiconductors (sensing ICs) are widely used for monitoring battery status. These sensing ICs are directly connected to the battery and maintain a continuous connection and receive power from it unless physically disconnected. Since ICs like these sensing ICs remain connected to the battery even when the vehicle's engine is off and consume battery current as a result, the IC is configured to enter sleep mode and standby when the vehicle's engine is turned off. Even when utilizing such a sleep mode, the IC is configured to monitor a specific pattern of signals input to a specific pin of the IC from outside the IC (e.g., other electronic devices in the vehicle, ECU, etc.) in order to wake up when the vehicle is turned on again. This method has the problem of constantly consuming current to operate the communication signal monitoring block inside the IC. Recently, the voltage level required for batteries in electric vehicles has been steadily increasing (400V to 800V). Consequently, as the number of ICs for battery management is also growing, reducing the current consumption of these ICs is being evaluated as an increasingly important factor. Meanwhile, the background technology of the present invention is disclosed in Korean Patent Publication No. 10-2020-0025944 (March 10, 2020). FIG. 1 is a block diagram showing the configuration of a battery management device according to one embodiment of the present invention. FIGS. 2 and FIGS. 3 are exemplary diagrams for explaining the wake-up signal input of a battery management device according to an embodiment of the present invention. FIG. 4 is an illustrative diagram for explaining a charge pump of a battery management device according to one embodiment of the present invention. FIG. 5 is a flowchart illustrating the operation method of a battery management device according to one embodiment of the present invention. Hereinafter, embodiments of a battery management device and a method of operation according to the present invention will be described with reference to the attached drawings. In this process, the thickness of lines or the size of components shown in the drawings may be exaggerated for clarity and convenience of explanation. Furthermore, the terms described below are defined considering their functions in the present invention, and these may vary depending on the intention or convention of the user or operator. Therefore, the definitions of these terms should be based on the content throughout this specification. FIG. 1 is a block diagram showing the configuration of a battery management device according to an embodiment of the present invention, FIG. 2 and FIG. 3 are illustrative diagrams for explaining the wake-up signal input of a battery management device according to an embodiment of the present invention, and FIG. 4 is an illustrative diagram for explaining the charge pump of a battery management device according to an embodiment of the present invention. Referring thereto, the battery management device according to an embodiment of the present invention is described as follows. As illustrated in FIG. 1, a battery management device according to one embodiment of the present invention is an integrated circuit composed of a package including a plurality of elements, semiconductor blocks, electronic circuits, etc., and may be, for example, a sensing IC that monitors the state of a battery (voltage, current, etc.). A battery management device according to one embodiment of the present invention includes terminals (pins) for connection with the outside, and may include at least a battery cell input pin (10) connected to an IC, a differential signal positive input pin (11) for communication of the IC, and a differential signal negative input pin (12) for communication of the IC. That is, the IC receives power from a battery connected to the battery cell input pin (10) and can receive communication signals from the outside of the IC (e.g., other electronic devices of a vehicle, ECU, etc.) through two communication signal input pins (11, 12). However, in some embodiments, the communication signal input pins may be configured with a different number (1, 3, etc.). A battery management device a