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KR-102962380-B1 - Wireless Battery Management System and Method for Operating The Same

KR102962380B1KR 102962380 B1KR102962380 B1KR 102962380B1KR-102962380-B1

Abstract

A battery sensing controller according to one aspect of the present invention, which can be woken up while operating in sleep mode with power supply cut off, is characterized by comprising: a micro-controller unit that generates a power supply disable signal when a sleep mode entry signal is received from a master controller during the sensing mode, and switches to sleep mode when power supply is cut off according to the power supply disable signal; a wireless charging unit that performs wireless charging by receiving a wake-up signal from the master controller during the sleep mode, and generates a power supply enable signal for resuming power supply using the charged power based on the wake-up signal; and a power supply unit that cuts off power supply to the micro-controller unit when the power supply disable signal is received, and resumes power supply to the micro-controller unit when the power supply enable signal is received, thereby causing the micro-controller unit to switch to the sensing mode.

Inventors

  • 선용주
  • 백종섭
  • 김종찬

Assignees

  • 주식회사 엘엑스세미콘

Dates

Publication Date
20260511
Application Date
20201218

Claims (19)

  1. A micro-controller that generates a power supply disable signal when a sleep mode entry signal is received from a master controller during a sensing mode, and switches to sleep mode when the power supply is cut off according to the power supply disable signal; A wireless charging unit that receives a wake-up signal from the master controller during the above sleep mode to perform wireless charging, and generates a power supply enable signal for resuming power supply using the charged power based on the wake-up signal; and It includes a power supply unit that cuts off power supply to the micro control unit when the power supply disable signal is received, and resumes power supply to the micro control unit when the power supply enable signal is received, thereby causing the micro control unit to switch to a sensing mode. The above wireless charging unit is a battery sensing controller that is activated during the sleep mode.
  2. In paragraph 1, The micro-control unit generates a wireless charging unit enable signal to activate the wireless charging unit when the sleep mode entry signal is received, and generates a wireless charging unit disable signal to deactivate the wireless charging unit when power supply is resumed according to the power supply enable signal. A battery sensing controller characterized in that the wireless charging unit is activated during the sleep mode according to the wireless charging unit enable signal and is deactivated during the sensing mode according to the wireless charging unit disable signal.
  3. In paragraph 1, The above wireless charging unit is, A wake-up signal receiving unit that receives the wake-up signal from the master controller and converts the power of the wake-up signal into DC power; An energy storage unit in which DC power converted by the wake-up signal receiving unit is charged; and A battery sensing controller characterized by including a control unit that generates a power supply enable signal when the power level of the power charged in the energy storage unit exceeds a predetermined threshold.
  4. In paragraph 3, The above wake-up signal receiving unit is, A power converter that converts the power of the above wake-up signal into direct current power; A data conversion unit that converts the above wake-up signal into digital data; and It includes a switching unit that selectively connects a signal transmitting and receiving antenna receiving the wake-up signal to either the power conversion unit or the data conversion unit. A battery sensing controller characterized in that the control unit provides a first switching signal to the switching unit to connect the signal transmitting/receiving antenna to the power conversion unit when the power level of the energy storage unit is below the reference value, and provides a second switching signal to the switching unit to connect the signal transmitting/receiving antenna to the data conversion unit when the power level of the energy storage unit is above the reference value.
  5. In paragraph 3, A battery sensing controller characterized by the above-described control unit extracting identification information of a battery module from the above-described wake-up signal, and generating the above-described power supply enable signal if the extracted identification information of the battery module is identical to the previously stored identification information of the battery module.
  6. In paragraph 1, It further includes a wireless transceiver unit that is activated during the above sensing mode to receive a battery sensing command or a sleep mode entry signal from the master control, or transmits a battery sensing signal generated according to the battery sensing command to the master controller, and is deactivated when the power supply is cut off during the sleep mode. A battery sensing controller characterized in that the power supply unit cuts off power supply to the wireless transceiver unit according to the power supply disable signal during the sleep mode, and resumes power supply to the wireless transceiver unit according to the power supply enable signal during the sensing mode.
  7. A step of receiving a wake-up signal from a master controller via a wireless charging unit in a sleep mode state where the power supply is cut off and performing wireless charging; A step of generating a power supply enable signal for resuming power supply using the charged power when the power level of the charged power based on the wake-up signal exceeds a predetermined threshold; and It includes the step of operating in a sensing mode that senses the characteristics of a battery module by resuming power supply according to the above power supply enable signal, The above wireless charging unit is a method of operation of a battery sensing controller that is activated during the above sleep mode.
  8. In Paragraph 7, Prior to the step of performing the above wireless charging, A method of operation of a battery sensing controller characterized by further including the step of operating in the sleep mode by generating a power supply disable signal and cutting off the power supply when a sleep mode entry signal is received from the master controller while operating in the sensing mode.
  9. In Paragraph 7, The step of performing the above wireless charging is, A step of receiving the wake-up signal from the master controller; A step of converting the power of the above wake-up signal into direct current power; A method of operation of a battery sensing controller characterized by including the step of charging the converted DC power to an energy storage unit.
  10. In Paragraph 7, The step of generating the above power supply enable signal is, A step of converting the wake-up signal into digital data if the power level of the power charged in the energy storage unit is greater than or equal to the above reference value; A step of extracting identification information of a battery module from a wake-up signal converted into the above digital data; A method of operation of a battery sensing controller characterized by including the step of generating a power supply enable signal if the identification information of an extracted battery module and the identification information of a battery module stored previously are identical.
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Description

Battery sensing controller, wireless battery management system including the same, and method for operating the wireless battery sensing controller The present invention relates to a battery management system, and more specifically, to a wireless battery management system. Battery packs installed in high-output applications, such as electric vehicles, include multiple battery modules connected in series or parallel. Such battery packs include a Battery Management System that monitors the status of the battery modules and executes control operations corresponding to the monitored status. A battery management system is equipped with a controller for acquiring and analyzing battery data. Since each battery module included in a battery pack contains multiple battery cells, there are limitations to monitoring the status of all battery cells included in the pack using a single controller. Accordingly, in order to distribute the load of the controllers and monitor the status of the entire battery pack quickly and accurately, a method is being utilized in which a slave controller is installed for each predetermined number of battery modules included in the battery pack, and a single master controller is used to control each slave controller. Recently, in order to prevent spatial inefficiency caused by wired communication channels (e.g., CAN communication channels) between a master controller and a slave controller, a technology has emerged that establishes a wireless communication channel between a master controller and a slave controller and performs communication between the master controller and the slave controller through the wireless communication channel. Meanwhile, the slave controller operates using the electrical energy from the installed battery module. Therefore, to reduce power consumption during periods when sensing operations are not required, the slave controller operates in sleep mode according to the master controller's commands. Once in sleep mode, the slave controller can only switch back to active mode upon receiving a wake-up command from the master controller. Consequently, the slave controller must periodically wake up even from sleep mode to verify whether the master controller is sending a wake-up command. As such, there is a problem in existing battery management systems where the slave controller must periodically wake up even in sleep mode, resulting in more current consumption than if the sleep mode were maintained continuously. In addition, since the slave controller requires wake-up synchronization time to wake up, it cannot receive commands from the master controller until synchronization is complete, which delays the overall wake-up time and consequently increases battery consumption. Furthermore, if the slave controller remains in sleep mode for a long time, there is a problem in that the battery's Depth of Discharge (DoD) increases due to continuous power consumption caused by periodic wake-ups, thereby shortening battery life. FIG. 1 is a block diagram schematically showing the configuration of a wireless battery management system according to one embodiment of the present invention. Figure 2 is a block diagram schematically showing the configuration of the battery sensing controller illustrated in Figure 1. FIG. 3 is a block diagram schematically showing the configuration of a wireless charging unit according to one embodiment of the present invention. Figure 4 is a block diagram schematically showing the configuration of the master controller illustrated in Figure 1. FIG. 5 is a diagram showing the packet configuration of a wake-up signal according to one embodiment of the present invention. FIG. 6 is a flowchart showing the operation method of a battery sensing controller according to one embodiment of the present invention. Throughout the specification, identical reference numbers denote substantially identical components. In the following description, detailed descriptions of components and functions known in the art may be omitted if they are not related to the core components of the invention. The meanings of the terms described in this specification should be understood as follows. The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. The shapes, sizes, ratios, angles, numbers, etc. disclosed in the drawings for explaining embodiments of the present invention are exemplary, and therefore the present invention is not limited to the depicted details