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CN-224218121-U - Wake-up circuit and battery management system

CN224218121UCN 224218121 UCN224218121 UCN 224218121UCN-224218121-U

Abstract

The utility model discloses a wake-up circuit and a battery management system, which comprise a charging signal module, a communication signal module, a switch signal module, a wake-up source detection module and a power supply enabling module, wherein the wake-up source detection module is connected with the charging signal module, the communication signal module and the switch signal module and is used for generating a first power supply wake-up signal according to the charging signal, the communication signal and a switch state, the power supply enabling module is connected with the wake-up source detection module and is used for generating a power supply enabling signal according to the first power supply wake-up signal, and the power supply enabling signal is used for controlling the power supplied by the wake-up module to work or power off dormancy. The awakening circuit and the battery management system can control the awakened module to work or sleep according to the charging signal, the communication signal or the switching state to realize the awakening of various awakening sources, and simultaneously control the awakened module to supply power to work or power off sleep through the power supply enabling signal, so that the awakened module can be powered off during sleep, and the power consumption is further reduced.

Inventors

  • YAO SHENGHUI
  • YU LEI
  • NIU WENBIN
  • NIU DUN

Assignees

  • 深圳智慧动锂电子股份有限公司

Dates

Publication Date
20260508
Application Date
20250526

Claims (10)

  1. 1. The wake-up circuit is characterized by comprising a charging signal module (11), a communication signal module (12), a switching signal module (13), a wake-up source detection module (14) and a power supply enabling module (15); The charging signal module (11) is connected with the charging interface and is used for receiving a charging signal of the charging interface, and the communication signal module (12) is connected with the communication interface and is used for receiving a communication signal of the communication interface; the switch signal module (13) is connected with the switch and is used for receiving the switch state; The wake-up source detection module (14) is connected with the charging signal module (11), the communication signal module (12) and the switch signal module (13) and is used for generating a first power supply wake-up signal according to the charging signal, the communication signal and the switch state; The power supply enabling module (15) is connected with the wake-up source detection module (14) and is used for generating a power supply enabling signal according to the first power supply wake-up signal, and the power supply enabling signal is used for controlling the wake-up module (2) to supply power for working or power-off dormancy.
  2. 2. The wake-up circuit of claim 1, wherein the first power wake-up signal and the power enable signal are asserted when at least one of the state of the charge signal, the state of the communication signal and the switch state is asserted, the wake-up module is powered up, and wherein the wake-up module (2) is powered down to sleep when the first power wake-up signal and the power enable signal are not asserted otherwise.
  3. 3. Wake-up circuit according to claim 1, wherein the awakened module (2) comprises a power supply circuit (21) and an MCU (22), the power supply circuit (21) being connected to the power supply enabling module (15) and the MCU (22), the power supply circuit (21) being adapted to receive a power supply enabling signal of the power supply enabling module (15) and to power the MCU (22) on or off depending on the state of the power supply enabling signal.
  4. 4. A wake-up circuit according to claim 3, characterized in that the wake-up circuit further comprises a charge detection module (16), a switch detection module (17) and a wake-up delay module (18), wherein the charge detection module (16) is connected with the charge signal module (11) and the MCU (22) for converting a charge signal received by the charge signal module (11) into a charge detection signal, the switch detection module (17) is connected with the switch and the MCU (22) for converting a switch state into a switch detection signal, the MCU (22) is connected with the wake-up delay module (18) for generating a wake-up delay signal according to the input charge detection signal, the switch detection signal, the communication signal and a preset time and outputting the wake-up delay signal to the wake-up delay module (18), the wake-up delay module (18) is used for generating a second power wake-up signal according to a state of the wake-up delay signal, and the power enabling module (15) is further connected with the wake-up delay module (18) for generating a power enabling signal according to a state of the second power wake-up signal.
  5. 5. The wake-up circuit according to claim 4, wherein the wake-up source detection module (14) comprises a first resistor, a second resistor, a third resistor, a clamping diode, a first triode and an output resistor, the first resistor, the second resistor, the third resistor and the clamping diode are sequentially connected, an emitter and a base of the first triode are respectively connected with two ends of the first resistor, the emitter of the first triode is further connected with a positive electrode of a battery to supply power for the wake-up source detection circuit, a collector of the first triode is connected with the power supply enabling module (15) through the output resistor to output a first power supply wake-up signal to the power supply enabling module (15), a cathode of the clamping diode is connected with a positive electrode of the battery, and an anode of the clamping diode is connected with the third resistor to clamp a potential of the third resistor.
  6. 6. The wake-up circuit according to claim 5, wherein the charging signal module (11) comprises a first diode, a second triode, a second diode, a fourth resistor and a fifth resistor, wherein an anode of the first diode is connected with the second resistor and the third resistor of the wake-up source detection module (14), a cathode of the first diode is connected with a collector of the second triode, an emitter of the second triode is connected with a charging interface to receive the charging signal, an emitter and a base of the second triode are respectively connected with two ends of the fourth resistor, and a base of the second triode is grounded through the fifth resistor and the second diode.
  7. 7. The wake-up circuit according to claim 6, wherein the charge detection module (16) comprises a fifth diode, a seventh resistor, an eighth resistor, a ninth resistor and a third capacitor, wherein a power supply, the seventh resistor, the eighth resistor and the ninth resistor which are output by the MCU (22) are sequentially connected with ground, a fifth diode cathode is connected with a first diode cathode of the charge signal module (11), a fifth diode anode is connected with the seventh resistor and the eighth resistor, two ends of the third capacitor are connected with two ends of the ninth resistor, and the eighth resistor and the ninth resistor are connected with the MCU (22) to provide a charge detection signal for the MCU (22).
  8. 8. The wake-up circuit according to claim 4, wherein the switch detection module (17) comprises a sixth diode, a tenth resistor and a fourth capacitor, wherein a cathode of the sixth diode is grounded through a switch, an anode of the sixth diode, the tenth resistor and the fourth capacitor are sequentially connected with ground, and a connection part of the tenth resistor and the fourth capacitor is connected with the MCU (22) to provide a switch detection signal for the MCU (22).
  9. 9. The wake-up circuit of claim 4, wherein the wake-up delay module (18) comprises a seventh diode, a fifth capacitor and an eleventh resistor, wherein one end of the eleventh resistor is connected to the MCU (22) to receive the wake-up delay signal of the MCU (22), the other end is connected to the power enable module (15) through the seventh diode to provide the second power wake-up signal to the power enable module (15), and the seventh diode anode is further grounded through the fifth capacitor to reduce noise.
  10. 10. A battery management system, characterized by comprising a wake-up circuit (1) according to any one of claims 3-9 and a wake-up module (2), wherein the wake-up circuit (1) is connected to the wake-up module (2) for controlling the wake-up module (2) to work or sleep, and wherein the wake-up module (2) further comprises one or more battery management system functional modules.

Description

Wake-up circuit and battery management system Technical Field The present utility model relates to the field of electronic technologies, and in particular, to a wake-up circuit and a battery management system. Background Electronic devices have developed rapidly in recent years, and users have increasingly demanded more and more intelligence for electronic products. The use of the electronic product by the user depends on the function of automatically realizing the on-off and automatic off according to the requirement. Meanwhile, as the functions of electronic products are increased, the wake-up demands of users are gradually updated, and currently, only single wake-up functions such as key switching, charge and discharge and the like cannot meet the demands of customers. And in some technologies, idle MCU dormancy is adopted, and when the technology is used, the MCU is awakened by an awakening source, so that the use requirement of a user is met. Although the power consumption is reduced to a certain extent, the power supply still needs to maintain the work of the power supply circuit of the chip and the MCU provides power. I.e. currently it is not possible to meet the user diversified wake-up and reduce the power consumption at the same time. Disclosure of Invention In order to improve the diversified wake-up functions of users and further reduce the power consumption, the utility model provides a wake-up circuit and a battery management system. According to the purpose, in one aspect, the utility model provides a wake-up circuit which comprises a charging signal module, a communication signal module, a switch signal module, a wake-up source detection module and a power supply enabling module, wherein the charging signal module is connected with a charging interface and used for receiving a charging signal of the charging interface, the communication signal module is connected with the communication interface and used for receiving a communication signal of the communication interface, the switch signal module is connected with a switch and used for receiving a switch state, the wake-up source detection module is connected with the charging signal module, the communication signal module and the switch signal module and used for generating a first power supply wake-up signal according to the charging signal, the communication signal and the switch state, the power supply enabling module is connected with the wake-up source detection module and used for generating a power supply enabling signal according to the first power supply wake-up signal, and the power supply enabling signal is used for controlling the wake-up module to supply to work or power off dormancy. Optionally, when at least one of the state of the charging signal, the state of the communication signal and the state of the switch is valid, the state of the first power wake-up signal and the state of the power enable signal are valid, the wake-up module supplies power to operate, otherwise, the state of the first power wake-up signal and the state of the power enable signal are invalid, and the wake-up module is powered off and dormant. Optionally, the awakened module comprises a power circuit and an MCU, wherein the power circuit is connected with the power enabling module and the MCU, and is used for receiving a power enabling signal of the power enabling module and powering the MCU or powering off according to the state of the power enabling signal. The wake-up circuit comprises a charging detection module, a switch detection module and a wake-up delay module, wherein the charging detection module is connected with the charging signal module and the MCU and used for converting a charging signal received by the charging signal module into a charging detection signal, the switch detection module is connected with the switch and the MCU and used for converting a switch state into a switch detection signal, the MCU is connected with the wake-up delay module and used for generating a wake-up delay signal according to the input charging detection signal, the switch detection signal, the communication detection signal and preset time and outputting the wake-up delay signal to the wake-up delay module, the wake-up delay module is used for generating a second power wake-up signal according to the state of the wake-up delay signal, and the power enabling module is also connected with the wake-up delay module and used for generating a power-up enabling signal according to the state of the second power-up signal. The wake-up source detection module comprises a first resistor, a second resistor, a third resistor, a clamping diode, a first triode and an output resistor, wherein the first resistor, the second resistor, the third resistor and the clamping diode are sequentially connected, an emitter and a base of the first triode are respectively connected with two ends of the first resistor, the emitter of the first triode is also connected with a battery