WO2024109359A1 - Bms休眠唤醒电路、方法、bms和用电设备 - Google Patents

Bms休眠唤醒电路、方法、bms和用电设备 Download PDF

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Publication number
WO2024109359A1
WO2024109359A1 PCT/CN2023/123613 CN2023123613W WO2024109359A1 WO 2024109359 A1 WO2024109359 A1 WO 2024109359A1 CN 2023123613 W CN2023123613 W CN 2023123613W WO 2024109359 A1 WO2024109359 A1 WO 2024109359A1
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WO
WIPO (PCT)
Prior art keywords
bms
wake
switch tube
circuit
chip
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Ceased
Application number
PCT/CN2023/123613
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English (en)
French (fr)
Inventor
陈伟杰
李伟强
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Contemporary Amperex Technology Co Ltd
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Contemporary Amperex Technology Co Ltd
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Publication date
Application filed by Contemporary Amperex Technology Co Ltd filed Critical Contemporary Amperex Technology Co Ltd
Priority to EP23893451.7A priority Critical patent/EP4512656B1/en
Publication of WO2024109359A1 publication Critical patent/WO2024109359A1/zh
Priority to US18/955,281 priority patent/US20250088021A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
    • B60L53/14—Conductive energy transfer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/90—Regulation of charging or discharging current or voltage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/12—Recording operating variables ; Monitoring of operating variables
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
    • B60L53/11—DC charging controlled by the charging station, e.g. mode 4
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
    • B60R16/0231—Circuits relating to the driving or the functioning of the vehicle
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/266—Arrangements to supply power to external peripherals either directly from the computer or under computer control, e.g. supply of power through the communication port, computer controlled power-strips
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/32—Means for saving power
    • G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
    • G06F1/3206—Monitoring of events, devices or parameters that trigger a change in power modality
    • G06F1/3215—Monitoring of peripheral devices
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/32—Means for saving power
    • G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
    • G06F1/3234—Power saving characterised by the action undertaken
    • G06F1/3287—Power saving characterised by the action undertaken by switching off individual functional units in the computer system
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/60—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries including safety or protection arrangements
    • H02J7/685—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries including safety or protection arrangements using connection detecting circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/80—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries including monitoring or indicating arrangements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

Definitions

  • the present application relates to the field of battery management, and in particular to a BMS sleep wake-up circuit, method, BMS and power-consuming equipment.
  • Charging is an indispensable function for new energy electric vehicles.
  • the vehicle design requires that the charging gun must be able to wake up the battery management system (BMS) after being inserted into the vehicle.
  • BMS battery management system
  • engineers focus on the gun plug-in wake-up function, and often ignore the need to support the BMS to enter sleep mode while keeping the charging gun in place. At this time, when charging is completed or stopped but the charging gun is not pulled out, the BMS cannot enter sleep mode, thereby increasing the lead-acid power consumption of the entire vehicle.
  • the embodiments of the present application provide a BMS sleep wake-up circuit, method, BMS and electrical equipment, which can solve the problem that the charging gun charging device cannot enter sleep mode without unplugging the BMS.
  • an embodiment of the present application provides a BMS sleep wake-up circuit, including:
  • a first detection port used to connect to a communication interface of a charging device
  • An enabling circuit connected to the first detection port and a wake-up chip of the BMS, for responding to access of a charging device and generating an enabling level to wake up the BMS;
  • the control circuit is used to output a self-locking signal to the wake-up chip to maintain the wake-up chip in a startup state; and is also used to respond to a sleep signal and stop outputting the self-locking signal.
  • an enabling circuit is provided to generate an enabling level in response to the connection of the charging device when the charging device is connected, so as to enable the wake-up chip to start to wake up the BMS in the dormant state (i.e., start), and output a self-locking signal through the control circuit so that the wake-up chip keeps the BMS awake; in addition, when the charging device remains connected, the self-locking signal is revoked when it needs to be dormant and the wake-up chip is turned off, so that the BMS can enter the dormant state, solving the problem in the related art that the BMS cannot enter the dormant state if the charging device is not unplugged; in addition, since the generated enabling level will inevitably generate an edge signal, whether it is an edge-triggered or level-triggered wake-up chip, it can satisfy the requirement that the BMS can be dormant while the charging device is connected, thereby reducing the lead-acid consumption of the battery.
  • control circuit is further used to output a self-locking signal to the enabling circuit
  • enabling circuit is further used to stop generating the enabling level in response to the self-locking signal and cut off the connection with the first detection port.
  • the self-locking signal can allow the enabling circuit to disconnect from the first detection port to avoid mutual interference between the enabling circuit and the charging device; it can also prevent the enabling circuit from being interfered with and continue to generate an enabling level, so that when the BMS needs to enter sleep mode, it can enter sleep mode smoothly.
  • the communication interface of the charging device is grounded through an impedance circuit.
  • the triggering enabling circuit responds to the access of the charging device by triggering the grounding of the communication interface of the charging device, thereby generating an enabling level, that is, providing a low-level signal to the first detection port, which is suitable for the AC_CC interface of the AC charging gun and the DC_CC2 interface of the DC charging gun.
  • the solution is simple and widely used.
  • the enabling circuit may be triggered to respond to the connection of a charging device by providing a rising edge, a falling edge or a high level signal.
  • the enabling circuit includes:
  • a trigger module connected to the first detection port and the control circuit, for generating a first level signal in response to the charging device being connected, and for maintaining the first level signal in response to the self-locking signal, and disconnecting the connection with the first detection port;
  • an embodiment of an enabling circuit in which a trigger module generates a first level signal in response to the access of a charging device (for example, triggered by the communication interface or the grounding of a first detection port), and the enabling module generates an enabling level according to the first level signal to start the wake-up chip to wake up the BMS in a dormant state; in addition, since the enabling module generates an enabling level based on a first level signal, the triggering module also maintains the first level signal after receiving a self-locking signal, and cuts off the connection with the first detection port to avoid mutual interference between the BMS dormant wake-up circuit and the charging device.
  • the self-locking signal can be canceled to enable the BMS to enter dormancy smoothly, and the circuit is simple and reliable.
  • the trigger module includes a first switch tube, a second switch tube, a voltage divider network, a first resistor and a second resistor, the voltage divider network is used to connect to a power supply and has a first voltage divider output terminal and a second voltage divider output terminal;
  • the first end of the first switch tube is connected to the first detection port, the second end of the first switch tube is connected to the first voltage divider output end, the control end of the first switch tube and the control end of the second switch tube are connected to the second voltage divider output end, the control end of the first switch tube and the control end of the second switch tube are also connected to the control circuit through the first resistor for receiving a self-locking signal, the first end of the second resistor is connected to the first voltage divider output end, the second end of the second resistor and the first end of the second switch tube are connected together as the output of the trigger module, and the second end of the second switch tube is grounded.
  • an implementation method of a trigger module is provided.
  • the first level signal is, for example, a low level signal.
  • the self-locking signal can allow the trigger module to disconnect from the first detection port through the first switch tube to avoid mutual interference between the trigger module and the charging device.
  • the second switch tube can also be kept turned on, so that the trigger module keeps outputting the first level signal to prevent the enabling circuit from continuing to generate an enabling level.
  • the BMS needs to enter sleep mode, it can enter sleep mode smoothly.
  • This circuit structure is simple, reliable, and low-cost.
  • the trigger module further includes a first unidirectional conducting device, and the first end of the first switch tube is forwardly connected to the first detection port through the first unidirectional conducting device.
  • the first unidirectional conductive device can prevent the current of the communication interface of the charging device from flowing to the BMS sleep wake-up circuit to avoid mutual influence.
  • the enabling module includes a third switch tube, a fourth switch tube, a fifth switch tube, a voltage dividing unit, an energy storage device, a third resistor, a fourth resistor and a fifth resistor;
  • the control end of the third switch tube is connected to the output of the trigger module, the first end of the third switch tube is used to connect to the power supply, the second end of the third switch tube is grounded through the voltage divider unit, the second end of the third switch tube is connected to the control end of the fourth switch tube, the first end of the fourth switch tube is used to connect to the power supply through the third resistor, the second end of the fourth switch tube is grounded, the first end of the fourth switch tube is connected to the first end of the energy storage device, the second end of the energy storage device is connected to the control end of the fifth switch tube, the first end of the fifth switch tube is used to connect to the power supply, the fourth resistor is connected between the control end and the first end of the fifth switch tube, the second end of the fifth switch tube is grounded through the fifth resistor, and the second end of the fifth switch tube is connected to the output end of the enable module;
  • the third switch tube is turned on based on the first level signal to turn on the fourth switch tube to drive the fifth switch tube to turn on, so that the output end of the enabling module outputs the enabling level, and after the fourth switch tube is turned on, the power supply charges the energy storage device through the fourth resistor, and after the voltage of the energy storage device reaches the voltage of turning off the fifth switch tube, the fifth switch tube is turned off to stop outputting.
  • Output enable level
  • the time duration from when the power supply starts charging the energy storage device to when the voltage reaching the voltage that turns off the fifth switch tube is the time duration of the output enable level.
  • the energy storage device such as the principle that the voltage at both ends of the capacitor does not change suddenly, is utilized to make the control end of the fifth switch tube present a low level and be turned on to output the enable level.
  • the power supply charges the energy storage device, and the voltage rises to make the fifth switch tube turn off to stop outputting the enable level.
  • the fifth switch tube can be opened for a certain time window, thereby outputting the enable level to enable the wake-up chip to start, and wake up the BMS in the dormant state.
  • the enabling module further includes a second unidirectional conducting device, which is forwardly connected between the second end of the fifth switch tube and the output end of the enabling module, and the output end of the enabling module is connected to the first enabling pin of the wake-up chip, so as to prevent the series connection of other wake-up source voltages using the first enabling pin of the wake-up chip from affecting the normal operation of the enabling module.
  • control circuit includes one of the control chips in the BMS, and a self-locking pin of the control chip is connected to a second enable pin of the wake-up chip and an enable circuit to provide a self-locking signal.
  • the enable circuit and the control circuit are connected to different pins of the wake-up chip, so that the control of the wake-up chip by the enable level and the control of the wake-up chip by the self-locking signal are independent of each other, so that the wake-up chip can be shut down after the self-locking signal is revoked to achieve sleep, thereby reducing the lead-acid consumption of the battery.
  • the wake-up chip is a power chip for supplying power to the BMS, or a control chip for controlling the BMS to sleep or wake up.
  • control circuit and the wake-up chip are the same control chip, so as to facilitate the setting of the system.
  • a sampling circuit is also included that is connected to the output of the enabling circuit, and is used to output a gun insertion signal when the enabling signal is detected, and is used to output a gun removal signal when the enabling signal is not detected, so as to facilitate the system to confirm the working status.
  • control circuit is connected to the sampling circuit and is also used to shut down the output of the self-locking signal when receiving the gun-drawing signal, so that the BMS can enter the gun-drawing sleep state.
  • an embodiment of the present application provides a BMS sleep wake-up method, including:
  • the enable level is generated in response to the charging device being connected to enable the wake-up chip of the BMS to start up to wake up the BMS;
  • the self-locking signal is stopped from being output in response to the sleep signal.
  • the BMS when the charging device is connected, the BMS responds to the trigger of the charging device connection to generate an enable level, enables the wake-up chip to start to wake up the BMS, and keeps the wake-up chip awake by outputting a self-locking signal; in addition, when the charging device is kept connected, the wake-up chip is turned off after the self-locking signal is canceled when it needs to sleep, so that the BMS can enter sleep mode, which solves the problem in the related art that the BMS cannot enter sleep mode if the charging device is not unplugged; and, since the generated enable level will generate an edge signal, both edge-triggered and level-triggered wake-up chips can satisfy the requirement of keeping the BMS in sleep mode while keeping the charging device connected, thereby reducing the lead-acid consumption of the battery.
  • the self-locking signal is also used to prohibit the generation of an enable level and disconnect the charging device.
  • the self-locking signal can disconnect the device from the charging device to avoid mutual interference with the charging device; it can also prevent interference and continue to generate an enable level, so that when the BMS needs to enter sleep mode, it can enter sleep mode smoothly.
  • an embodiment of the present application provides a BMS, including the above-mentioned BMS sleep wake-up circuit.
  • the BMS when the charging device is connected, the BMS responds to the connection of the charging device and enables the wake-up chip to start up to wake up the BMS in the dormant state, and the awakened BMS keeps the wake-up chip started by outputting a self-locking signal; in addition, when the charging device is kept unplugged, the BMS can enter the dormant state after the self-locking signal is canceled when it needs to go into dormancy, which solves the problem that the BMS cannot enter the dormant state if the charging device is not unplugged, thereby reducing the lead-acid consumption of the battery.
  • an embodiment of the present application provides an electrical device, including a battery and the above-mentioned BMS.
  • the electric device when the charging device is connected to the electric device, the electric device responds to the trigger of the charging device connection to enable the wake-up chip to start up so as to wake up the BMS in the sleep state of the electric device, and the awakened BMS keeps the wake-up chip started by outputting a self-locking signal; in addition, when the charging device is kept unplugged, the BMS can enter the sleep state after the self-locking signal is canceled when sleep is required, which solves the problem that the BMS cannot enter the sleep state if the charging device is not unplugged, thereby reducing the lead-acid consumption of the battery.
  • FIG1 is a module diagram of a BMS sleep wake-up circuit provided in some embodiments of the present application.
  • FIG2 is a module diagram of a BMS sleep wake-up circuit provided in some embodiments of the present application.
  • FIG4 is a flow chart of a BMS sleep wake-up method provided in some embodiments of the present application.
  • the reference numerals in the specific implementation manner are as follows: Charging device 10, communication interface 11, first detection port 110, enabling circuit 120, trigger module 122, enabling module 124, control circuit 130, sampling circuit 140, wake-up chip 200; A first switch tube Q1, a second switch tube Q2, a third switch tube Q3, a fourth switch tube Q4, an impedance circuit R0, a fifth switch tube Q5, an energy storage device C1, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first enable pin EN1, a second enable pin EN2, a first unidirectional conductor D1, a second unidirectional conductor D2, and a power supply U1.
  • the term "and/or" is only a description of the association relationship of associated objects, indicating that three relationships may exist.
  • a and/or B can represent: A exists alone, A and B exist at the same time, and B exists alone.
  • the character "/" in this article generally indicates that the associated objects before and after are in an "or" relationship.
  • multiple refers to more than two (including two).
  • multiple groups refers to more than two groups (including two groups), and “multiple pieces” refers to more than two pieces (including two pieces).
  • the charging wake-up function is often used in conjunction with the edge-valid wake-up function of the wake-up chip, but currently there are many application chips that do not support edge wake-up.
  • the inventive concept of the present application is to allow the wake-up chip used in the charging wake-up function to have a basic level wake-up function, and of course it can also be compatible with the edge-valid wake-up function.
  • the embodiment of the present application mainly introduces an inventive concept of a BMS interface circuit for a docking interface of a charging device (such as a charging gun), which supports access wake-up and also supports sleep without unplugging.
  • the wake-up channel of the wake-up chip used (such as a power chip, or other chips with a wake-up function) can have a level or edge wake-up function.
  • the charging gun interface supports waking up by plugging the charging gun into the charging gun through an equivalent impedance circuit and a grounded communication interface (such as the AC_CC interface of the AC charging gun and the DC_CC2 interface of the DC charging gun). It also supports sleep mode without unplugging the charging gun under the control of the BMS, so that the BMS can enter sleep mode after charging is completed or stopped, saving energy and reducing the loss of lead-acid battery in the whole vehicle.
  • FIG1 is a block diagram of a BMS sleep wake-up circuit provided in some embodiments of the present application.
  • the BMS sleep wake-up circuit includes a first detection port 110 , an enabling circuit 120 and a control circuit 130 .
  • the first detection port 110 is used to connect to the communication interface 11 of the charging device 10; the enabling circuit 120 is connected to the first detection port 110 and the wake-up chip 200 of the BMS, and is used to respond to the access of the charging device 10 and generate an enabling level to wake up the BMS; the control circuit 130 outputs a self-locking signal to the wake-up chip 200 to maintain the wake-up chip 200 in the startup state, and is also used to stop outputting the self-locking signal when responding to the sleep signal.
  • the wake-up chip 200 is turned off to put the BMS into a sleep state, which solves the problem in the related art that the charging device 10 cannot enter a sleep state without unplugging the BMS, and reduces the lead-acid consumption of the battery.
  • the charging device 10 is, for example, a charging gun, or a general charging adapter on the market.
  • a wake-up signal such as a high level, low level, rising edge or falling edge signal
  • the enabling circuit 120 responds to the wake-up signal and generates an enable level to enable the BMS wake-up signal.
  • the wake-up chip 200 is started to allow the wake-up chip 200 of the BMS to wake up the entire BMS, including the control circuit 130 .
  • an enable level is generated in response to the connection of the charging device 10, and the wake-up chip 200 of the BMS is enabled and disappears after it is started. Therefore, it is necessary to generate a self-locking signal to the wake-up chip 200 to maintain the wake-up chip 200 in the startup state before the enable level disappears or before the wake-up chip 200 of the BMS is awakened and automatically shuts down. After that, when the BMS needs to sleep, the self-locking signal is canceled and the wake-up chip 200 is turned off, so that the BMS enters the sleep state.
  • the enable level generated by the enable circuit 120 being triggered by the grounding of the first detection port 110 is a high level, which must also include a rising edge and a falling edge. Then, the wake-up chip 200 of the BMS can be enabled and started with a high level validity, or it can be enabled and started with a rising edge validity.
  • the control circuit 130 is a part of the BMS, and when the BMS in the dormant state is awakened, the control circuit 130 is started.
  • the control circuit 130 outputs a self-locking signal that maintains the wake-up chip 200 in the startup state, so that the wake-up chip 200 always wakes up the BMS to work, thus completing the wake-up process of the dormant BMS. It is understandable that to maintain the wake-up chip 200 in the startup state, the self-locking signal should be generated within the enable level maintenance time or before the wake-up chip 200 is automatically shut down after being awakened.
  • This BMS wake-up and sleep control method can be applied to a level- and/or edge-triggered wake-up chip 200.
  • the communication interface 11 of the charging device 10 is grounded via an impedance circuit R0 .
  • the communication interface 11 of the charging device 10 is, for example, the AC_CC interface of an AC charging gun or the DC_CC2 interface of a DC charging gun, or the communication interface of a charging adapter, and the impedance circuit R0 is the interface equivalent resistance.
  • the corresponding interface of the charging interface is grounded through the communication interface 11 (i.e., the AC_CC interface of the AC charging gun or the DC_CC2 interface of the DC charging gun) to enter the charging gun connection stage, and the communication interface 11 is in a grounded state during this stage.
  • the first detection port 110 when the charging gun is connected, the first detection port 110 is connected to the communication interface 11 of the charging device 10 and is pulled down to the ground by the communication interface 11 of the charging device 10, that is, a low-level signal is input. On the contrary, when the charging device 10 is not connected, the first detection port 110 is at a high level.
  • the enable circuit 120 is triggered by the grounding of the first detection port 110 to determine that the charging device 10 is connected.
  • the enable level is output to enable the wake-up chip 200 to start to wake up the BMS in the dormant state and then canceled, and the self-locking signal is output through the control circuit 130 so that the wake-up chip 200 keeps the BMS awake; in addition, when the charging device 10 remains connected, since the enable level is canceled, the wake-up chip 200 is turned off after the self-locking signal is canceled when it needs to sleep, so that the BMS can enter the dormant state, solving the problem that the BMS cannot enter the dormant state if the charging device 10 is not unplugged.
  • the generated enable level will inevitably generate an edge signal, whether it is edge-triggered or level-triggered wake-up chip 200, it can satisfy the requirement of being able to sleep the BMS while keeping the charging device 10 connected, thereby reducing the lead-acid consumption of the battery.
  • control circuit 130 is further configured to output a self-locking signal to the enabling circuit 120
  • enabling circuit 120 is further configured to stop generating an enabling level in response to the self-locking signal and disconnect the first detection port 110 .
  • Outputting the self-locking signal to the enabling circuit 120 is actually to allow the enabling circuit 120 to maintain the state after being triggered by the first detection port 110 being grounded before the BMS enters the next sleep state.
  • the control circuit 130 can cancel the self-locking signal and enter sleep mode.
  • the self-locking signal can also allow the enabling circuit 120 to disconnect from the first detection port 110 to avoid interference between the BMS sleep wake-up circuit and the communication interface 11 of the charging device 10, which may cause the charging device 10 to collect information from the communication interface 11 incorrectly, or the BMS sleep wake-up circuit fails to wake up the BMS or enters sleep mode incorrectly.
  • FIG. 2 is a module diagram of a BMS sleep wake-up circuit provided in some embodiments of the present application.
  • the enabling circuit 120 includes a trigger module 122 and an enabling module 124.
  • the trigger module 122 is connected to the first detection port 110 and the control circuit 130, and is used to generate a first level signal in response to the charging device 10 being connected, and is also used to maintain the first level signal in response to the self-locking signal, and cut off the connection with the first detection port 110;
  • the enabling module 124 is connected to the trigger module 122, and is used to generate an enabling level based on a first level signal.
  • the enabling level is used to output to the wake-up chip 200 of the BMS to enable the wake-up chip 200 to start, so as to wake up the BMS.
  • the trigger module 122 when the charging gun is connected, the trigger module 122 is triggered by the grounding of the first detection port 110 and generates a low-level signal. When the charging gun is unplugged, the trigger module 122 outputs the highest level signal.
  • the enable module 124 is also used to receive the high-level signal to stop outputting the enable level (high level or rising edge). At this time, a low level is output. For the wake-up chip 200 that is effective at a high level or a rising edge, the low level cannot enable the start of the wake-up signal.
  • the trigger module 122 Since the enable module 124 generates an enable level based on a first-level signal, the trigger module 122 also maintains the output of a low-level signal after receiving the self-locking signal, so that when the BMS needs to enter sleep, it only needs to cancel the self-locking signal to enter sleep.
  • the trigger module 122 cuts off the connection with the first detection port 110 to avoid interference between the BMS sleep wake-up circuit and the charging device 10.
  • the circuit design is simple and reliable.
  • FIG. 3 is a circuit diagram of a BMS sleep wake-up circuit provided in some embodiments of the present application.
  • the trigger module 122 includes a first switch tube Q1, a second switch tube Q2, a voltage divider network, a first resistor R1, and a second resistor R2.
  • the voltage divider network is connected to the power supply U1 and has a first voltage divider output terminal a and a second voltage divider output terminal b; the first end of the first switch tube Q1 is connected to the first detection port 110, the second end of the first switch tube Q1 is connected to the first voltage divider output terminal a, the control end of the first switch tube Q1 and the control end of the second switch tube Q2 are connected to the second voltage divider output terminal b, the control end of the first switch tube Q1 and the control end of the second switch tube Q2 are also connected to the control circuit 130 through the first resistor R1 for receiving a self-locking signal, the first end of the second resistor R2 is connected to the first voltage divider output terminal a, the second end of the second resistor R2 and the first end of the second switch tube Q2 are connected together as the output of the trigger module 122, and the second end of the second switch tube Q2 is grounded.
  • the first switch tube Q1 can be a semiconductor transistor that is turned on at a low level, such as a P-channel MOS tube, an IGBT, etc.
  • the control end, the first end, and the second end of the first switch tube Q1 are respectively the gate, the drain, and the source of the MOS tube.
  • the second switch tube Q2 can be a semiconductor transistor that is turned on at a high level, such as an N-channel MOS tube, an IGBT, etc.
  • the control end, the first end, and the second end of the first switch tube Q1 are respectively the gate, the drain, and the source of the MOS tube.
  • the voltage divider network includes a resistor R11, a resistor R12, and a resistor R13 connected in series between the power supply U1 and the ground, the series node of the resistor R11 and the resistor R12 is the first voltage divider output terminal a, and the series node of the resistor R12 and the resistor R13 is the second voltage divider output terminal b.
  • the output Vc of the trigger module 122 is a low-level signal; if the second switch tube Q2 receives a self-locking signal (high level), that is, the first switch tube Q1 is turned off and disconnected from the first detection port 110, but the second switch tube Q2 is turned on and the output Vc of the trigger module 122 can still be a low-level signal.
  • the trigger module 122 is disconnected from the first detection port 110 through the first switch tube Q1 to avoid mutual interference between the trigger module 122 and the charging device 10, and the second switch tube Q2 can be kept turned on so that the trigger module 122 keeps outputting the first level signal to prevent the enabling circuit 120 from continuing to generate the enabling voltage.
  • the BMS needs to enter sleep mode, it can enter sleep mode smoothly.
  • the circuit structure is simple, reliable and low-cost.
  • the trigger module 122 further includes a first unidirectional conducting device D1 , and the first end of the first switch tube Q1 is forwardly connected to the first detection port 110 through the first unidirectional conducting device D1 .
  • the first unidirectional conductive device D1 may be a diode.
  • the first unidirectional conductive device D1 may prevent the current of the communication interface 11 of the charging device 10 from flowing to the BMS sleep wake-up circuit to avoid mutual influence.
  • the enabling module 124 includes a third switch tube Q3 , a fourth switch tube Q4 , a fifth switch tube Q5 , an energy storage device C1 , a voltage dividing unit, a third resistor R3 , a fourth resistor R4 , and a fifth resistor R5 ;
  • the control end of the third switch tube Q3 is connected to the output of the trigger module 122, the first end of the third switch tube Q3 is connected to the power supply U1, the second end of the third switch tube Q3 is grounded through the voltage divider unit, the second end of the third switch tube Q3 is connected to the control end of the fourth switch tube Q4, the first end of the fourth switch tube Q4 is connected to the power supply U1 through the third resistor R3, the second end of the fourth switch tube Q4 is grounded, the first end of the fourth switch tube Q4 is connected to the first end of the energy storage device C1, the second end of the energy storage device C1 is connected to the control end of the fifth switch tube Q5, the first end of the fifth switch tube Q5 is connected to the power supply U1, the fourth resistor R4 is connected between the control end and the first end of the fifth switch tube Q5, the second end of the fifth switch tube Q5 is grounded through the fifth resistor R5, and the second end of the fifth switch tube Q5 is connected to the output end of the enabling module 124.
  • the third switch tube Q3 can be a semiconductor transistor that is turned on at a low level, such as a P-channel MOS tube, an IGBT, etc.
  • the control end, the first end, and the second end of the third switch tube Q3 are respectively the gate, the source, and the drain of the MOS tube.
  • the fourth switch tube Q4 and the fifth switch tube Q5 can be semiconductor transistors that are turned on at a high level, such as an N-channel MOS tube, an IGBT, etc.
  • the control end, the first end, and the second end of the first switch tube Q1 are respectively the gate, the drain, and the source of the MOS tube.
  • the energy storage device C1 is, for example, a capacitor.
  • the voltage divider unit includes a capacitor C2 and a resistor R7 connected in parallel, and the capacitor C2 has an energy storage function to keep the gate level of the MOS tube stable.
  • the third switch tube Q3 is turned on based on the first level signal to turn on the fourth switch tube Q4 to drive the fifth switch tube Q5 to be turned on, so that the output end of the enabling module 124 outputs the enable level, and after the fourth switch tube Q4 is turned on, the energy storage device C1, the power supply U1 charges the energy storage device C1 through the fourth resistor R4, and after the voltage of the energy storage device C1 reaches the voltage that turns off the fifth switch tube Q5, the fifth switch tube Q5 is turned off to stop outputting the enable level; wherein, the time from the power supply U1 starting to charge the energy storage device C1 to reaching the voltage that turns off the fifth switch tube Q5 is the time for outputting the enable level.
  • the energy storage device C1 such as the principle that the voltage at both ends of the capacitor does not change suddenly, is used to make the control end of the fifth switch tube Q5 present a low level and turn on to output the enable level.
  • the power supply U1 charges the energy storage device C1, and the voltage rises to make the fifth switch tube Q5 turn off to stop outputting the enable level.
  • the fifth switch tube Q5 can be opened in a certain time window, thereby outputting the enable level to enable the wake-up chip 200 to start, and wake up the BMS in the dormant state.
  • the power supply U1 may be a common power supply on the BMS board, generally 3.3 volts (V) or 5V, or a level power supply adapted to the system.
  • the enabling module 124 further includes a second unidirectional conducting device D2, which is forwardly connected between the second end of the fifth switch tube Q5 and the output end of the enabling module 124, and the output end of the enabling module 124 is connected to the first enabling pin EN1 of the wake-up chip 200. This prevents other wake-up source voltages from being connected in series with the first enabling pin EN1 of the wake-up chip 200 to affect the normal operation of the enabling module 124.
  • the control circuit 130 includes one of the control chips in the BMS, and a lock pin of the control chip is connected to a second enable pin EN2 of the wake-up chip 200 to provide a self-locking signal.
  • the enabling circuit 120 and the control circuit 130 are connected to different enabling pins of the wake-up chip 200 so that the enabling level is
  • the wake-up chip 200 and the self-locking signal control the wake-up chip 200 independently, so that the wake-up chip 200 after startup can be locked by the self-locking signal output by the control chip, so that the wake-up chip 200 can be turned off after the self-locking signal is canceled to achieve sleep, thereby reducing the lead-acid consumption of the battery.
  • the wake-up chip 200 is a power chip for supplying power to the BMS, or a control chip for controlling the BMS to sleep or wake up.
  • the wake-up chip 200 is a component in the BMS.
  • the external high-level signal or rising edge signal is enabled through the first enable pin EN1 to start the wake-up chip 200, and then the entire BMS is activated to start working.
  • a power chip with a high-level and/or rising edge signal wake-up function when receiving an external level signal (such as a high level), outputs the back-end power demand voltage, so that the entire BMS starts working.
  • a control chip with a level and/or rising edge signal wake-up function when receiving an external level signal (such as a high level), outputs a control signal to control the start of the power module, so that the power module outputs the back-end power demand voltage, so that the entire BMS starts working.
  • an external level signal such as a high level
  • the BMS sleep and wake-up circuit of the embodiment of the present application is compatible with level-triggered and/or edge-triggered power chips and control chips, so that the level-triggered and/or edge-triggered BMS can also realize the access wake-up and sleep of the charging device 10.
  • control circuit 130 and the wake-up chip 200 are the same control chip.
  • the control chip receives the enable level through the first enable pin EN1 and is enabled, it generates a self-locking signal to the second enable pin EN2 to maintain the working state.
  • the self-locking signal is canceled, the wake-up chip 200 can be turned off to put the BMS into sleep mode.
  • the BMS sleep wake-up circuit further includes a sampling circuit 140, which is connected to the output of the enabling circuit 120 and the control circuit 130.
  • the sampling circuit 140 is used to output a plug-in signal when an enabling signal is detected; and to output a pull-out signal when an enabling signal is not detected.
  • the control circuit 130 is also used to turn off the output of the self-locking signal when a pull-out signal is received, so that the BMS can enter the pull-out sleep state.
  • the sampling circuit 140 includes a resistor R8 and a capacitor C3. One end of the resistor R8 is connected to the output of the enabling circuit 120, and the other end is connected to the control circuit 130.
  • the capacitor C3 is connected between the resistor R8 and the ground.
  • the gun pulling signal can be a level signal, which is not limited here.
  • the control circuit 130 can cancel the self-locking signal according to the pull-out signal, thereby turning off the wake-up chip 200 and hibernating the BMS.
  • the charging gun is connected, that is, the impedance circuit R0 in Figure 1 is connected.
  • the Vc state changes to a low level
  • the third switch tube Q3 is turned on (that is, Vci>Q3-Vgsth)
  • Vd changes from a low level to a high level
  • the fourth switch tube Q4 is turned on (that is, Vd>Q4-Vgsth).
  • Ve changes from a high level to a low level, and the voltage across the energy storage device C1 cannot change suddenly (capacitive characteristics).
  • Vf will also change from a high level to a low level, so that the fifth switch tube Q5 is turned on (that is, Vfj>Q5-Vgsth).
  • the Vg state rises from a low level to a high level. That is, the first enable pin EN1 of the corresponding enable wake-up chip 200 changes from low to high, triggering the edge/high level wake-up function, activating the BMS to start working, and after the BMS is activated, the control circuit 130 outputs a self-locking signal to the second enable pin EN2 of the wake-up chip 200 to maintain the wake-up state.
  • the self-locking signal also controls the first switch tube Q1 to turn off, and also controls the second switch tube Q2 to turn on, so that Vc remains at a low level.
  • FIG. 4 is a flow chart of a BMS sleep wake-up method provided in some embodiments of the present application, and is combined with FIG. 1 to FIG. 3.
  • the present application embodiment provides a BMS sleep wake-up method, including:
  • Step S110 when a charging device is connected, generating an enable level in response to the connection of the charging device to enable a wake-up chip of the BMS to start up to wake up the BMS;
  • Step S120 generating a self-locking signal, wherein the self-locking signal is used to maintain the wake-up chip in a startup state;
  • Step S130 if a sleep signal is received, stop outputting the self-locking signal in response to the sleep signal.
  • the BMS when the charging device 10 is connected, the BMS generates an enable level in response to the connection of the charging device 10, enables the wake-up chip 200 to start to wake up the BMS in the dormant state, and outputs a self-locking signal so that the wake-up chip 200 keeps the BMS awake; in addition, when the charging device 10 remains connected, the wake-up chip 200 is turned off after the self-locking signal is canceled, so that the BMS can enter the dormant state, solving the problem in the related art that the BMS cannot enter the dormant state if the charging device 10 is not unplugged.
  • the generated enable level will generate an edge signal, whether it is an edge-triggered or level-triggered wake-up chip 200, it can satisfy the requirement of being able to put the BMS into dormancy while keeping the charging device 10 connected, thereby reducing the lead-acid consumption of the battery.
  • the self-locking signal is further used to prohibit the generation of the enable level and disconnect the charging device 10 .
  • the self-locking signal can disconnect the device from the communication interface 11 of the charging device 10 to avoid mutual interference with the charging device 10; it can also prevent interference and continue to generate an enable level, so that when the BMS needs to enter sleep mode, it can enter sleep mode smoothly.
  • the present application provides a BMS including the above-mentioned BMS sleep wake-up circuit.
  • the BMS when the charging device 10 is connected, the BMS generates an enable level in response to the connection of the charging device 10, so as to enable the wake-up chip 200 to start up to wake up the BMS in the sleep state, and the awakened BMS keeps the wake-up chip 200 started by outputting a self-locking signal; in addition, when the charging device 10 remains unplugged, the BMS can enter the sleep state after the self-locking signal is canceled, which solves the problem that the BMS cannot enter the sleep state if the charging device 10 is not unplugged, thereby reducing the lead-acid consumption of the battery.
  • the present application provides an electrical device, including a battery and the above-mentioned BMS.
  • the electric device may be a new energy electric vehicle, a cleaning robot, an energy storage device, etc.
  • the electric device when the charging device 10 is connected, the electric device generates an enable level in response to the connection of the charging device 10, so as to enable the wake-up chip 200 to start up to wake up the BMS of the electric device, and the awakened BMS keeps the wake-up chip 200 started by outputting a self-locking signal; in addition, when the charging device 10 remains unplugged, the BMS can enter sleep mode after the self-locking signal is canceled, which solves the problem that the BMS cannot enter sleep mode if the charging device 10 is not unplugged, thereby reducing the lead-acid consumption of the battery.

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Abstract

提供了一种BMS休眠唤醒电路、方法、BMS和用电设备，其中BMS休眠唤醒电路设置使能电路（120）在充电设备（10）接入时，响应充电设备接入产生使能电平，以唤醒BMS，且通过控制电路（130）输出自锁信号使得唤醒芯片（200）对BMS保持唤醒。另外，在充电设备保持不拔出的情况下，撤销掉自锁信号后唤醒芯片则关闭，使得BMS可以进入休眠状态，解决了相关技术中充电设备不拔出BMS则无法进入休眠状态的问题。

Description

BMS休眠唤醒电路、方法、BMS和用电设备
本申请要求于2022年11月24日在中华人民共和国国家知识产权局提交的、申请号为202211484339.4、发明名称为“BMS休眠唤醒电路、方法、BMS和用电设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及电池管理领域，具体涉及一种BMS休眠唤醒电路、方法、BMS和用电设备。
背景技术
新能源电动车产品上，充电是必不可少的功能，针对国标充电枪的对地充电接口(如交流充电抢的AC_CC接口，直流充电枪的DC_CC2接口)，整车设计要求充电枪插入整车后需能唤醒电池管理系统(Battery Management System，BMS)，工程师在进行设计时，重点放在了插枪唤醒功能上，很多时候会忽略掉在保持充电枪不拔出的情况也需支持BMS能够进入休眠，此时在充电完成或停止但未拔出充电枪的情况下，BMS也就没法进入休眠，从而增加了整车铅酸的电消耗。
申请内容
鉴于上述问题，本申请实施例提供一种BMS休眠唤醒电路、方法、BMS和用电设备，能够解决充电枪充电设备不拔出BMS没法进入休眠的问题。
第一方面，本申请实施例提供了一种BMS休眠唤醒电路，包括：
第一检测端口，用于连接到充电设备的通讯接口；
使能电路，与第一检测端口和BMS的唤醒芯片连接，用于响应充电设备接入，产生使能电平以唤醒BMS；
控制电路，用于输出自锁信号到唤醒芯片以维持唤醒芯片在启动状态；还用于响应休眠信号，停止输出自锁信号。
本申请实施例的技术方案中，设置使能电路在充电设备接入时，响应充电设备接入产生使能电平，使能唤醒芯片启动以唤醒休眠状态的BMS(即启动)，且通过控制电路输出自锁信号使得唤醒芯片对BMS保持唤醒；另外，在充电设备保持不拔出的情况下，需要休眠时撤销掉自锁信号后唤醒芯片则关闭，使得BMS即可以进入休眠状态，解决了相关技术中充电设备不拔出BMS则无法进入休眠状态的问题；另外，由于产生的使能电平必定会产生边沿信号，因此无论是边沿触发还是电平触发的唤醒芯片都能满足在保持充电设备接入时，能够休眠BMS，从而降低电池的铅酸消耗。
在一些实施例中，控制电路还用于将自锁信号输出到使能电路，使能电路还用于响应自锁信号停止产生使能电平，并关断与第一检测端口的连接。
本申请实施例的技术方案中，自锁信号可以让使能电路断开与第一检测端口的连接，以避免使能电路与充电设备相互干扰；还可以防止使能电路受到干扰而继续产生使能电平，在BMS需要进入休眠时候，可以顺利进入。
在一些实施例中，充电设备的通讯接口通过一阻抗电路接地。
本申请实施例的技术方案中，触发使能电路响应充电设备接入的方式是充电设备的通讯接口接地的触发，从而产生使能电平，即提供一个低电平信号给第一检测端口，适用于交流充电抢的AC_CC接口，直流充电枪的DC_CC2接口，方案应用简单、广泛。在其他 实施例中，可以触发使能电路响应充电设备接入的方式还可以是提供一个上升沿、下降沿或高电平信号。
在一些实施例中，使能电路包括：
触发模块，与第一检测端口和控制电路连接，用于响应充电设备接入产生第一电平信号，还用于响应自锁信号维持第一电平信号，且关断与第一检测端口之间的连接；
使能模块，与触发模块连接，用于基于一个第一电平信号产生一个使能电平。
本申请实施例的技术方案中，提供了一种使能电路的实施例，触发模块响应充电设备接入(比如受通讯接口、第一检测端口接地的触发)而产生第一电平信号，使能模块根据第一电平信号产生使能电平启动唤醒芯片，以唤醒休眠状态的BMS；另外，由于使能模块是基于一个第一电平信号产生一个使能电平，因此，触发模块还在接收到自锁信号之后维持第一电平信号，关断与第一检测端口的连接，避免BMS休眠唤醒电路与充电设备相互干扰，在BMS未在使能电平的使能下需要进入休眠时，撤销掉自锁信号则能顺利休眠，电路简单，可靠。
在一些实施例中，触发模块包括第一开关管、第二开关管、分压网络、第一电阻和第二电阻，分压网络用于连接到电源，并具有第一分压输出端和第二分压输出端；
第一开关管的第一端连接到第一检测端口，第一开关管的第二端连接到第一分压输出端，第一开关管的控制端、第二开关管的控制端连接到第二分压输出端，第一开关管的控制端、第二开关管的控制端还通过第一电阻连接到控制电路以用于接收自锁信号，第二电阻的第一端连接到第一分压输出端，第二电阻的第二端与第二开关管的第一端共接作为触发模块的输出，第二开关管的第二端接地。
本申请实施例的技术方案中，提供了一种触发模块的实施方式，第一电平信号例如是低电平信号，自锁信号可以让触发模块通过第一开关管断开与第一检测端口的连接，以避免触发模块与充电设备相互干扰，还可以让第二开关管维持导通，使得触发模块的保持输出第一电平信号，防止使能电路继续产生使能电平，在BMS需要进入休眠时候，可以顺利进入，此电路结构简单可靠，也成本低。
在一些实施例中，触发模块还包括第一单向导通器件，第一开关管的第一端通过第一单向导通器件正向连接到第一检测端口。
本申请实施例的技术方案中，第一单向导通器件可以阻止充电设备的通讯接口的电流流向本BMS休眠唤醒电路，以避免相互影响。
在一些实施例中，使能模块包括第三开关管、第四开关管、第五开关管、分压单元、储能器件、第三电阻、第四电阻以及第五电阻；
第三开关管的控制端连接到触发模块的输出，第三开关管的第一端用于连接到电源，第三开关管的第二端通过分压单元接地，第三开关管的第二端连接到第四开关管的控制端，第四开关管的第一端用于通过第三电阻连接到电源，第四开关管的第二端接地，第四开关管的第一端连接储能器件的第一端，储能器件的第二端连接到第五开关管的控制端，第五开关管的第一端用于连接到电源，第四电阻连接在第五开关管的控制端和第一端之间，第五开关管的第二端通过第五电阻接地，且第五开关管的第二端连接到使能模块的输出端；
第三开关管基于第一电平信号导通以使第四开关管导通以驱动第五开关管导通，以使能模块的输出端输出使能电平，且储能器件在第四开关管导通后，电源通过第四电阻对储能器件充电，在储能器件的电压达到关断第五开关管的电压后，关断第五开关管以停止输 出使能电平；
其中，电源对储能器件开始充电到达到关断第五开关管的电压的时长为输出使能电平的时长。
本申请实施例的技术方案中，当第四开关管导通时，利用储能器件，比如电容器两端电压不突变原理，使得第五开关管的控制端呈现低电平而导通从而输出使能电平，同时电源给储能器件充电，电压上升至使得第五开关管关断以停止输出使能电平，通过给储能器件的充电过程配置使能电平的时长，可以让第五开关管有一定时间窗口打开，从而输出使能电平使能唤醒芯片启动，唤醒休眠状态的BMS。
在一些实施例中，使能模块还包括第二单向导通器件，第二单向导通器件正向连接在第五开关管的第二端和使能模块的输出端之间，使能模块的输出端连接到唤醒芯片的第一使能引脚。避免同用唤醒芯片的第一使能引脚的其他唤醒源电压的串入影响使能模块的正常工作。
在一些实施例中，控制电路包括BMS中的其中一个控制芯片，控制芯片的自锁引脚连接到唤醒芯片的第二使能引脚以及使能电路，以提供自锁信号。
本申请实施例的技术方案中，使能电路与控制电路连接到唤醒芯片的不同管脚，使得使能电平对唤醒芯片和自锁信号对唤醒芯片的控制相互独立，以此能够在撤销自锁信号之后实现唤醒芯片的关闭，以实现休眠，从而降低电池的铅酸消耗。
在一些实施例中，唤醒芯片为用于给BMS供电的电源芯片，或用于控制BMS休眠或唤醒的控制芯片。
在一些实施例中，控制电路与唤醒芯片为同一个控制芯片。以便于系统的设置。
在一些实施例中，还包括采样电路连接到使能电路的输出，用于在检测到使能信号时，输出插抢信号，用于在未检测到使能信号时，输出拔枪信号。便于系统确认工作状态。
在一些实施例中，控制电路与采样电路连接，还用于在接收到拔枪信号时，关断自锁信号的输出。便于BMS进入拔枪休眠。
第二方面，本申请实施例提供了一种BMS休眠唤醒方法，包括：
在充电设备接入时，响应充电设备接入产生使能电平使能BMS的唤醒芯片启动以唤醒BMS；
产生自锁信号，自锁信号用于维持唤醒芯片在启动状态；
若接收到休眠信号，则响应休眠信号停止输出自锁信号。
本申请实施例的技术方案中，BMS在充电设备接入时，响应充电设备接入的触发产生使能电平，使能唤醒芯片启动以唤醒BMS，并通过输出自锁信号使得唤醒芯片对BMS保持唤醒；另外，在充电设备保持不拔出的情况下，需要休眠时撤销掉自锁信号后唤醒芯片则关闭，使得BMS即可以进入休眠，解决了相关技术中充电设备不拔出BMS则无法进入休眠状态的问题；并且，由于产生的使能电平会产生边沿信号，因此无论是边沿触发还是电平触发的唤醒芯片都能满足在保持充电设备接入时，能够休眠BMS，从而降低电池的铅酸消耗。
在一些实施例中，自锁信号还用于禁止产生使能电平，并断开充电设备的接入。
本申请实施例的技术方案中，自锁信号可以使得设备与充电设备的连接断开，以避免与充电设备相互干扰；还可以防止受到干扰而继续产生使能电平，在BMS需要进入休眠时候，可以顺利进入。
第三方面，本申请实施例提供了一种BMS，包括上述的BMS休眠唤醒电路。
本申请实施例的技术方案中，BMS在充电设备接入时，响应充电设备接入而使能唤醒芯片启动以唤醒休眠状态的BMS，并且唤醒后的BMS通过输出自锁信号保持唤醒芯片启动；另外，在充电设备保持不拔出的情况下，需要休眠时撤销掉自锁信号后BMS即可以进入休眠状态，解决了充电设备不拔出BMS则无法进入休眠状态的问题，从而降低电池的铅酸消耗。
第四方面，本申请实施例提供了一种用电设备，包括电池以及上述的BMS。
本申请实施例的技术方案中，用电设备在充电设备接入时，响应充电设备接入的触发使能唤醒芯片启动以唤醒用电设备的休眠状态的BMS，并且唤醒后的BMS通过输出自锁信号保持唤醒芯片启动；另外，在充电设备保持不拔出的情况下，需要休眠时撤销掉自锁信号后BMS即可以进入休眠状态，解决了充电设备不拔出BMS则无法进入休眠状态的问题，从而降低电池的铅酸消耗。
上述说明仅是本申请技术方案的概述，为了能够更清楚了解本申请的技术手段，而可依照说明书的内容予以实施，并且为了让本申请的上述和其它目的、特征和优点能够更明显易懂，以下特举本申请的具体实施方式。
附图说明
通过阅读对下文优选实施方式的详细描述，各种其他的优点和益处对于本领域普通技术人员将变得清楚明了。附图仅用于示出优选实施方式的目的，而并不认为是对本申请的限制。而且在全部附图中，用相同的附图标号表示相同的部件。在附图中：
图1为本申请一些实施例提供的BMS休眠唤醒电路的模块图；
图2为本申请一些实施例提供的BMS休眠唤醒电路的模块图；
图3为本申请一些实施例提供的BMS休眠唤醒电路的电路图；
图4为本申请一些实施例提供的BMS休眠唤醒方法的流程图；
具体实施方式中的附图标号如下：
充电设备10，通讯接口11，第一检测端口110，使能电路120，触发模块122，使能模
块124，控制电路130，采样电路140，唤醒芯片200；
第一开关管Q1，第二开关管Q2，第三开关管Q3、第四开关管Q4、阻抗电路R0，第
五开关管Q5，储能器件C1，第一电阻R1，第二电阻R2，第三电阻R3，第四电阻R4，第五电阻R5，第一使能引脚EN1，第二使能引脚EN2，第一单向导通器D1，第二单向导通器件D2，电源U1。
具体实施方式
下面将结合附图对本申请技术方案的实施例进行详细的描述。以下实施例仅用于更加清楚地说明本申请的技术方案，因此只作为示例，而不能以此来限制本申请的保护范围。
除非另有定义，本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同；本文中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请；本申请的说明书和权利要求书及上述附图说明中的术语“包括”和“具有”以及它们的任何变形，意图在于覆盖不排他的包含。
在本申请实施例的描述中，技术术语“第一”“第二”等仅用于区别不同对象，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量、特定顺序或主次关系。在本申请实施例的描述中，“多个”的含义是两个以上，除非另有明确具体的限定。
在本文中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。本领域技术人员显式地和隐式地理解的是，本文所描述的实施例可以与其它实施例相结合。
在本申请实施例的描述中，术语“和/或”仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
在本申请实施例的描述中，术语“多个”指的是两个以上(包括两个)，同理，“多组”指的是两组以上(包括两组)，“多片”指的是两片以上(包括两片)。
在本申请实施例的描述中，技术术语“中心”“纵向”“横向”“长度”“宽度”“厚度”“上”“下”“前”“后”“左”“右”“竖直”“水平”“顶”“底”“内”“外”“顺时针”“逆时针”“轴向”“径向”“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请实施例和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请实施例的限制。
在本申请实施例的描述中，除非另有明确的规定和限定，技术术语“安装”“相连”“连接”“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；也可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请实施例中的具体含义。
充电唤醒功能，往往配合使用的是唤醒芯片的边沿有效唤醒功能，但目前存在很多应用芯片不支持边沿唤醒。基于此，本申请发明构思在于让充电唤醒功能使用到的唤醒芯片具备基础的电平唤醒功能即可，当然也可以兼容边沿有效唤醒功能。具体地，本申请实施例主要介绍一种针对充电装置(比如充电枪)对接接口的BMS接口电路的发明构思，支持接入唤醒，同时也支持不拔出下休眠。使用到的唤醒芯片(如电源芯片，或其他具备唤醒功能的芯片)的唤醒通道具备电平或边沿唤醒功能即可。
比如在新能源电动车产品上，支持充电枪接口通过等效的阻抗电路及接地的通讯接口(如交流充电抢的AC_CC接口，直流充电枪的DC_CC2接口)充电枪口插枪唤醒，同样也支持在BMS的控制下，在充电枪保持插枪状态的情况下实现不拔枪休眠，使得在充电完成或停止后，BMS可以进入休眠，节省能耗，降低整车铅酸的损耗。
请参阅图1，图1为本申请一些实施例提供的BMS休眠唤醒电路的模块图。BMS休眠唤醒电路包括第一检测端口110、使能电路120和控制电路130。
第一检测端口110用于连接到充电设备10的通讯接口11；使能电路120与第一检测端口110、BMS的唤醒芯片200连接，用于响应充电设备10接入，产生使能电平以唤醒BMS；控制电路130输出自锁信号到唤醒芯片200以维持唤醒芯片200在启动状态，还用于响应休眠信号时，停止输出自锁信号。以关闭唤醒芯片200，使BMS进入休眠状态，解决了相关技术中充电设备10在不拔出BMS则无法进入休眠状态的问题，降低了电池的铅酸消耗。
充电设备10比如是充电枪，或者是市面上的一般充电适配器。对于BMS休眠唤醒电路，充电设备10接入时，会给第一检测端口110带来一个唤醒信号，比如高电平、低电平、上升沿或下降沿信号，使能电路120响应与该唤醒信号，产生一个使能电平使能BMS的唤 醒芯片200启动以让BMS的唤醒芯片200唤醒整个BMS，包括控制电路130。
在一些实施例中，响应充电设备10接入产生一个使能电平，且使能BMS的唤醒芯片200启动后即消失，那么则需要在使能电平消失之前或BMS的唤醒芯片200被唤醒又自动关机之前，产生一个自锁信号到唤醒芯片200以维持唤醒芯片200在启动状态。此后，BMS需要休眠时，撤销掉自锁信号则关闭唤醒芯片200，使BMS进入休眠状态。由此可以看出，由于使能电平唤醒BMS即消失，不需要再检测充电设备10的是否接入来确定是否需要进入休眠，解决了相关技术中充电设备10在不拔出BMS则无法进入休眠状态的问题，降低了电池的铅酸消耗。
可以理解的是，产生使能电平必定会产生边沿信号。比如，使能电路120受第一检测端口110接地而触发所产生的一个使能电平为高电平，必定也包括一个上升沿和一个下降沿。那么，BMS的唤醒芯片200是可以高电平有效的使能启动，也可以是上升沿有效的使能启动。控制电路130是BMS中的一部分，当休眠状态的BMS被唤醒后，控制电路130则被启动。因此，唤醒芯片200启动之后将唤醒休眠状态的BMS，通过控制电路130输出维持唤醒芯片200在启动状态的自锁信号，使得唤醒芯片200始终唤醒BMS以工作，如此完成了休眠状态的BMS的唤醒过程。可以理解的是，要维持唤醒芯片200在启动状态，自锁信号应在使能电平维持时长内或唤醒芯片200被唤醒后自动关机之前产生。
此后，比如充电完毕后中止时，若想降低电池的铅酸消耗，由于使能电平已停止输出，则可以直接通过停止自锁信号的输出，让唤醒芯片200关闭，让BMS进入休眠状态。这种BMS唤醒、休眠控制方式，可以适用于电平和/或边缘触发的唤醒芯片200。
在一些实施例中，充电设备10的通讯接口11通过一阻抗电路R0接地。
充电设备10的通讯接口11比如是交流充电抢的AC_CC接口或直流充电枪的DC_CC2接口，或者充电适配器的通讯接口，阻抗电路R0为接口等效电阻。以充电枪为例，在将充电枪与充电接口连接之后，通过通讯接口11(即交流充电抢的AC_CC接口或直流充电枪的DC_CC2接口)将充电接口相应的接口接地而进入充电枪连接阶段，并且在该阶段通讯接口11呈接地状态。
可以理解，在充电枪接入状态时，第一检测端口110连接到充电设备10的通讯接口11，被充电设备10的通讯接口11拉低到地，即输入一个低电平信号。相反，在充电设备10未接入状态，第一检测端口110为高电平。
使能电路120受第一检测端口110接地触发来确定在充电设备10接入，响应充电设备10接入，输出使能电平使能唤醒芯片200启动以唤醒休眠状态的BMS后撤销，且通过控制电路130输出自锁信号使得唤醒芯片200对BMS保持唤醒；另外，在充电设备10保持不拔出的情况下，由于使能电平被撤销，之后需要休眠时撤销掉自锁信号后唤醒芯片200则关闭，使得BMS即可以进入休眠状态，解决了充电设备10不拔出BMS则无法进入休眠的问题。并且，由于产生的使能电平必定会产生边沿信号，因此无论是边沿触发还是电平触发的唤醒芯片200都能满足在保持充电设备10接入时，能够休眠BMS，从而降低电池的铅酸消耗。
在一些实施例中，控制电路130还用于将自锁信号输出到使能电路120，使能电路120还用于响应自锁信号停止产生使能电平，并关断与第一检测端口110的连接。
将自锁信号输出到使能电路120实际上是为了让BMS进入下一次休眠之前，让使能电路120维持在受第一检测端口110接地触发之后的状态不变，在使能电平结束之后，控 制电路130可以撤销掉自锁信号而进入休眠。另外，自锁信号还可以让使能电路120断开与第一检测端口110的连接，以避免本BMS休眠唤醒电路与充电设备10的通讯接口11相互干扰，导致充电设备10对通讯接口11的信息采集发生错误，或者BMS休眠唤醒电路对BMS的唤醒失败或错误地进入休眠状态。
在一些实施例中，请参阅图2，图2为本申请一些实施例提供的BMS休眠唤醒电路的模块图。
使能电路120包括触发模块122和使能模块124。触发模块122与第一检测端口110和控制电路130连接，用于响应充电设备10接入产生第一电平信号，还用于响应自锁信号维持第一电平信号，且关断与第一检测端口110的连接；使能模块124与触发模块122连接，用于基于一个第一电平信号产生一个使能电平。使能电平用于输出到BMS的唤醒芯片200使能唤醒芯片200启动，以唤醒BMS。
可以理解的是，在充电枪接入时，触发模块122受第一检测端口110接地的触发而产生的是低电平信号，在充电枪拔出时，触发模块122输出第高电平信号，使能模块124还用于接收高电平信号停止输出使能电平(高电平或上升沿)，此时输出低电平，对于高电平或上升沿有效的唤醒芯片200，低电平不能使能启动唤醒信号。由于使能模块124是基于一个第一电平信号产生一个使能电平，因此，触发模块122还在接收到自锁信号之后维持输出低电平信号，可以入让BMS需要进入休眠时只需要撤销掉自锁信号即可以进入休眠。触发模块122关断与第一检测端口110的连接，避免BMS休眠唤醒电路与充电设备10相互干扰，该电路设计简单，可靠。
在一些实施例中，请参阅图3，图3为本申请一些实施例提供的BMS休眠唤醒电路的电路图。触发模块122包括第一开关管Q1、第二开关管Q2、分压网络、第一电阻R1和第二电阻R2，分压网络连接到电源U1，并具有第一分压输出端a和第二分压输出端b；第一开关管Q1的第一端连接到第一检测端口110，第一开关管Q1的第二端连接到第一分压输出端a，第一开关管Q1的控制端、第二开关管Q2的控制端连接到第二分压输出端b，第一开关管Q1的控制端、第二开关管Q2的控制端还通过第一电阻R1连接到控制电路130以用于接收自锁信号，第二电阻R2的第一端连接到第一分压输出端a，第二电阻R2的第二端与第二开关管Q2的第一端共接作为触发模块122的输出，第二开关管Q2的第二端接地。
示例性的，第一开关管Q1可以是低电平导通的半导体晶体管，比如P沟道MOS管，IGBT等。第一开关管Q1的控制端、第一端、第二端分别为MOS管的栅极、漏极、源极。第二开关管Q2可以是高电平导通的半导体晶体管，比如N沟道MOS管，IGBT等。第一开关管Q1的控制端、第一端、第二端分别为MOS管的栅极、漏极、源极。分压网络包括串联连接在电源U1和地之间的电阻R11、电阻R12、电阻R13，电阻R11和电阻R12的串联节点为第一分压输出端a，电阻R12和电阻R13的串联节点为第二分压输出端b。
第一检测端口110接地时，触发模块122的输出Vc为低电平信号；如果第二开关管Q2接收到自锁信号(高电平)，即第一开关管Q1关断，断开与第一检测端口110连接，但第二开关管Q2导通依旧可以让触发模块122的输出Vc为低电平信号。
本申请实施例的技术方案中，让触发模块122通过第一开关管Q1断开与第一检测端口110的连接，以避免触发模块122与充电设备10相互干扰，还可以让第二开关管Q2维持导通，使得触发模块122的保持输出第一电平信号，防止使能电路120继续产生使能电 平，在BMS需要进入休眠时候，可以顺利进入，此电路结构简单可靠，也成本低。
在一些实施例中，请参阅图3，触发模块122还包括第一单向导通器件D1，第一开关管Q1的第一端通过第一单向导通器件D1正向连接到第一检测端口110。
示例性的，第一单向导通器件D1可以是二极管。本申请实施例的技术方案中，第一单向导通器件D1可以阻止充电设备10的通讯接口11的电流流向本BMS休眠唤醒电路，以避免相互影响。
在一些实施例中，请参阅图3，使能模块124包括第三开关管Q3、第四开关管Q4、第五开关管Q5、储能器件C1、分压单元、第三电阻R3、第四电阻R4以及第五电阻R5；
第三开关管Q3的控制端连接到触发模块122的输出，第三开关管Q3的第一端连接到电源U1，第三开关管Q3的第二端通过分压单元接地，第三开关管Q3的第二端连接到第四开关管Q4的控制端，第四开关管Q4的第一端通过第三电阻R3连接到电源U1，第四开关管Q4的第二端接地，第四开关管Q4的第一端连接储能器件C1的第一端，储能器件C1的第二端连接到第五开关管Q5的控制端，第五开关管Q5的第一端连接到电源U1，第四电阻R4连接在第五开关管Q5的控制端和第一端之间，第五开关管Q5的第二端通过第五电阻R5接地，且第五开关管Q5的第二端连接到使能模块124的输出端。
示例性的，第三开关管Q3可以是低电平导通的半导体晶体管，比如P沟道MOS管，IGBT等。第三开关管Q3的控制端、第一端、第二端分别为MOS管的栅极、源极、漏极。第四开关管Q4、第五开关管Q5可以是高电平导通的半导体晶体管，比如N沟道MOS管，IGBT等。第一开关管Q1的控制端、第一端、第二端分别为MOS管的栅极、漏极、源极。储能器件C1比如是电容器。分压单元包括并联连接的电容C2和电阻R7，电容C2储能作用，保持MOS管的栅极电平稳定。
第三开关管Q3基于第一电平信号导通以使第四开关管Q4导通以驱动第五开关管Q5导通，以使能模块124的输出端输出使能电平，且储能器件C1在第四开关管Q4导通后，电源U1通过第四电阻R4对储能器件C1充电，在储能器件C1的电压达到关断第五开关管Q5的电压后，关断第五开关管Q5以停止输出使能电平；其中，电源U1对储能器件C1开始充电到达到关断第五开关管Q5的电压的时长为输出使能电平的时长。
本申请实施例的技术方案中，当第四开关管Q4导通时，利用储能器件C1，比如电容器两端电压不突变原理，使得第五开关管Q5的控制端呈现低电平而导通从而输出使能电平，同时电源U1给储能器件C1充电，电压上升至使得第五开关管Q5关断以停止输出使能电平，通过给储能器件C1的充电过程配置使能电平的时长，可以让第五开关管Q5有一定时间窗口打开，从而输出使能电平使能唤醒芯片200启动，唤醒休眠状态的BMS。
电源U1可以为BMS板上的常用电源，一般为3.3伏特(V)或者5V，或者适配该系统的电平电源。
在一些实施例中，使能模块124还包括第二单向导通器件D2，第二单向导通器件D2正向连接在第五开关管Q5的第二端和使能模块124的输出端之间，使能模块124的输出端连接到唤醒芯片200的第一使能引脚EN1。避免同用唤醒芯片200的第一使能引脚EN1的其他唤醒源电压的串入影响使能模块124的正常工作。
在一些实施例中，请参阅图3，控制电路130包括BMS中的其中一个控制芯片，控制芯片的锁定引脚连接到唤醒芯片200的第二使能引脚EN2，以提供自锁信号。
使能电路120与控制电路130连接到唤醒芯片200的不同使能管脚，使得使能电平对 唤醒芯片200和自锁信号对唤醒芯片200的控制相互独立，使得启动后的唤醒芯片200能被控制芯片输出的自锁信号锁定，以此能够在撤销自锁信号之后实现唤醒芯片200的关闭，以实现休眠，从而降低电池的铅酸消耗。
在一些实施例中，唤醒芯片200为用于给BMS供电的电源芯片，或用于控制BMS休眠或唤醒的控制芯片。
可以理解，唤醒芯片200为BMS中的一个部件，外部输入的高电平信号或上升沿信号通过第一使能引脚EN1使能启动该唤醒芯片200，继而激活整个BMS开始工作。如具备高电平和/或上升沿信号唤醒功能的电源芯片，当接收到外部电平信号(比如高电平)，输出后端用电需求电压，从而让整个BMS开始工作。如具备电平和/或上升沿信号唤醒功能的控制芯片，当接收到外部电平信号(比如高电平)，输出控制电源模块启动的控制信号，让电源模块输出后端用电需求电压，从而让整个BMS开始工作。
本申请实施例的BMS休眠唤醒电路能够兼容电平触发和/或边沿触发的电源芯片和控制芯片，使得电平触发和/或边沿触发的BMS也能够实现充电设备10接入唤醒和休眠。
在一些实施例中，控制电路130与唤醒芯片200为同一个控制芯片。在工作过程中，该控制芯片通过第一使能引脚EN1接收使能电平被使能启动后，自身产生一个自锁信号给第二使能引脚EN2以维持在工作状态。并在撤销掉自锁信号即可以让唤醒芯片200关闭，以休眠BMS。
在一些实施例中，请参阅图3，BMS休眠唤醒电路还包括采样电路140，采样电路140连接到使能电路120的输出和控制电路130，采样电路140用于在检测到使能信号时，输出插抢信号；用于在未检测到使能信号时，输出拔出信号。在一些实施例中，控制电路130还用于在接收到拔枪信号时，关断所述自锁信号的输出，便于BMS进入拔枪休眠。
采样电路140包括电阻R8和电容C3。电阻R8一端连接到使能电路120的输出，另一端连接到控制电路130，电容C3连接到电阻R8和地之间。拔枪信号可以是一个电平信号，在此不做限定。控制电路130可以根据拔出信号撤销自锁信号，从而关闭唤醒芯片200，休眠BMS。
在一些实施例中，请参阅图3，充电枪未接入状态，即附图1中的阻抗电路R0未接入，Vba此时呈现一定电压，即Vba＞Q1-Vgsth(栅源阈值电压)，使得第一开关管Q1导通；此时BMS处休眠状态，控制电路130未输出高电平(自锁信号)，第二开关管Q2处截止不导通状态(即Vb＜Q2-Vgsth)；Vc＝U1，第三开关管Q3也处截止不导通状态(即Vci＜Q3-Vgsth)；储能器件C1两端电压稳定，第五开关管Q5处截止不导通状态(即Vfj＜Q5-Vgsth)，此时Vg为低电平，BMS未被唤醒激活；
充电枪接入状态，即附图1中的阻抗电路R0接入，此时Vc状态变为低电平，第三开关管Q3导通(即Vci＞Q3-Vgsth)，Vd由低电平变为高电平，第四开关管Q4导通(即Vd＞Q4-Vgsth)，此时Ve由高电平变为低电平，储能器件C1两端电压不能突变(电容特性)，Vf也会由高电平变为低电平，使得第五开关管Q5导通(即Vfj＞Q5-Vgsth)，此时Vg状态由低电平上升为高电平，即对应的使能唤醒芯片200的第一使能引脚EN1由低变高，触发边沿/高电平唤醒功能，激活BMS开始工作，BMS被激活后，控制电路130输出自锁信号到唤醒芯片200的第二使能引脚EN2，保持唤醒状态，该自锁信号还控制第一开关管Q1关断，同时也会控制第二开关管Q2导通，使得Vc保持低电平，在BMS需要插枪进入休眠时，即自锁信号消失后，由于Vc一直保持低电平，此时BMS所在设备保持插 枪情况下，BMS进入休眠也不会使得储能器件C1两端电压发生突变而重复唤醒BMS。
第二方面，请参阅图4，图4为本申请一些实施例提供的BMS休眠唤醒方法的流程图，并结合图1至图3。本申请实施例提供了一种BMS休眠唤醒方法，包括：
步骤S110，在充电设备接入时，响应所述充电设备接入产生使能电平使能BMS的唤醒芯片启动以唤醒BMS；
步骤S120，产生自锁信号，所述自锁信号用于维持所述唤醒芯片在启动状态；
步骤S130，若接收到休眠信号，则响应所述休眠信号停止输出所述自锁信号。
本申请实施例的技术方案中，BMS在充电设备10接入时，响应充电设备10接入的产生使能电平，使能唤醒芯片200启动以唤醒休眠状态的BMS，并通过输出自锁信号使得唤醒芯片200对BMS保持唤醒；另外，在充电设备10保持不拔出的情况下，撤销掉自锁信号后唤醒芯片200则关闭，使得BMS即可以进入休眠状态，解决了相关技术中充电设备10不拔出BMS则无法进入休眠状态的问题。并且，由于产生的使能电平会产生边沿信号，因此无论是边沿触发还是电平触发的唤醒芯片200都能满足在保持充电设备10接入时，能够休眠BMS，从而降低电池的铅酸消耗。
在一些实施例中，所述自锁信号还还用于禁止产生所述使能电平，并断开所述充电设备10的接入。
本申请实施例的技术方案中，自锁信号可以使得设备与充电设备10的通讯接口11的连接断开，以避免与充电设备10相互干扰；还可以防止受到干扰而继续产生使能电平，在BMS需要进入休眠时候，可以顺利进入。
第三方面，请参阅图3，本申请提供了一种BMS，包括上述的BMS休眠唤醒电路。
本申请实施例的技术方案中，BMS在充电设备10接入时，响应充电设备10接入产生使能电平，以使能唤醒芯片200启动以唤醒休眠状态的BMS，并且唤醒后的BMS通过输出自锁信号保持唤醒芯片200启动；另外，在充电设备10保持不拔出的情况下，撤销掉自锁信号后BMS即可以进入休眠状态，解决了充电设备10不拔出BMS则无法进入休眠状态的问题，从而降低电池的铅酸消耗。
第四方面，本申请提供了一种用电设备，包括电池以及上述的BMS。
用电设备可以是新能源电动车，清洁机器人，储能设备等。本申请实施例的技术方案中，用电设备在充电设备10接入时，响应充电设备10的接入产生使能电平，以使能唤醒芯片200启动以唤醒用电设备的BMS，并且唤醒后的BMS通过输出自锁信号保持唤醒芯片200启动；另外，充电设备10保持不拔出的情况下，撤销掉自锁信号后BMS即可以进入休眠，解决了充电设备10不拔出BMS则无法进入休眠状态的问题，从而降低电池的铅酸消耗。
上述说明仅是本申请技术方案的概述，为了能够更清楚了解本申请的技术手段，而可依照说明书的内容予以实施，并且为了让本申请的上述和其它目的、特征和优点能够更明显易懂，以下特举本申请的具体实施方式。
最后应说明的是：以上各实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述各实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围，其均应涵盖在本申请的权利要求和说明书的范围当中。尤其是，只要不存在结 构冲突，各个实施例中所提到的各项技术特征均可以任意方式组合起来。本申请并不局限于文中公开的特定实施例，而是包括落入权利要求的范围内的所有技术方案。

Claims (17)

  1. 一种BMS休眠唤醒电路，其中，包括：
    第一检测端口，用于连接到充电设备的通讯接口；
    使能电路，与所述第一检测端口和BMS的唤醒芯片连接，用于响应充电设备接入，产生使能电平以唤醒所述BMS；
    控制电路，用于输出自锁信号到所述唤醒芯片以维持所述唤醒芯片在启动状态；还用于响应休眠信号，停止输出所述自锁信号。
  2. 如权利要求1所述的BMS休眠唤醒电路，其中，所述控制电路还用于将所述自锁信号输出到所述使能电路，所述使能电路还用于响应所述自锁信号停止产生所述使能电平，并关断与所述第一检测端口的连接。
  3. 如权利要求1所述的BMS休眠唤醒电路，其中，所述充电设备的通讯接口通过一阻抗电路接地。
  4. 如权利要求1、2或3所述的BMS休眠唤醒电路，其中，所述使能电路包括：
    触发模块，与所述第一检测端口和所述控制电路连接，用于响应所述充电设备接入产生第一电平信号，还用于响应所述自锁信号维持所述第一电平信号，且关断与所述第一检测端口之间的连接；
    使能模块，与所述触发模块连接，用于基于一个所述第一电平信号产生一个所述使能电平。
  5. 如权利要求4所述的BMS休眠唤醒电路，其中，所述触发模块包括第一开关管、第二开关管、分压网络、第一电阻和第二电阻，所述分压网络用于连接到电源，并具有第一分压输出端和第二分压输出端；
    所述第一开关管的第一端连接到所述第一检测端口，所述第一开关管的第二端连接到所述第一分压输出端，所述第一开关管的控制端、所述第二开关管的控制端连接到所述第二分压输出端，所述第一开关管的控制端、所述第二开关管的控制端还通过所述第一电阻连接到所述控制电路以用于接收所述自锁信号，所述第二电阻的第一端连接到第一分压输出端，所述第二电阻的第二端与所述第二开关管的第一端共接作为所述触发模块的输出，所述第二开关管的第二端接地。
  6. 如权利要求5所述的BMS休眠唤醒电路，其中，所述触发模块还包括第一单向导通器件，所述第一开关管的第一端通过所述第一单向导通器件正向连接到所述第一检测端口。
  7. 如权利要求4至6任一项所述的BMS休眠唤醒电路，其中，所述使能模块包括第三开关管、第四开关管、第五开关管、分压单元、储能器件、第三电阻、第四电阻以及第五电阻；
    所述第三开关管的控制端连接到所述触发模块的输出，所述第三开关管的第一端用于连接到电源，所述第三开关管的第二端通过所述分压单元接地，所述第三开关管的第二端连接到所述第四开关管的控制端，所述第四开关管的第一端用于通过所述第三电阻连接到所述电源，所述第四开关管的第二端接地，所述第四开关管的第一端连接所述储能器件的第一端，所述储能器件的第二端连接到所述第五开关管的控制端，所述第五开关管的第一端用于连接到所述电源，所述第四电阻连接在所述第五开关管的控制端和第一端之间，所 述第五开关管的第二端通过所述第五电阻接地，且所述第五开关管的第二端连接到所述使能模块的输出端；
    所述第三开关管基于所述第一电平信号导通以使所述第四开关管导通以驱动所述第五开关管导通，以所述使能模块的输出端输出所述使能电平，且所述储能器件在所述第四开关管导通后，所述电源通过所述第四电阻对所述储能器件充电，在所述储能器件的电压达到关断所述第五开关管的电压后，关断所述第五开关管以停止输出所述使能电平；
    其中，所述电源对所述储能器件开始充电到达到关断所述第五开关管的电压的时长为输出所述使能电平的时长。
  8. 如权利要求7所述的BMS休眠唤醒电路，其中，所述使能模块还包括第二单向导通器件，所述第二单向导通器件正向连接在所述第五开关管的第二端和所述使能模块的输出端之间，所述使能模块的输出端连接到所述唤醒芯片的第一使能引脚。
  9. 如权利要求8所述的BMS休眠唤醒电路，其中，所述控制电路包括所述BMS中的其中一个控制芯片，所述控制芯片的自锁引脚连接到所述唤醒芯片的第二使能引脚以及所述使能电路，以提供所述自锁信号。
  10. 如权利要求1所述的BMS休眠唤醒电路，其中，所述唤醒芯片为用于给所述BMS供电的电源芯片，或用于控制所述BMS休眠或唤醒的控制芯片。
  11. 如权利要求1、2、9或10所述的BMS休眠唤醒电路，其中，所述控制电路与所述唤醒芯片为同一个控制芯片。
  12. 如权利要求1所述的BMS休眠唤醒电路，其中，还包括采样电路，所述采样电路连接到所述使能电路的输出，用于在检测到所述使能信号的情况下，输出插抢信号，以及还用于在未检测到所述使能信号的情况下，输出拔枪信号。
  13. 如权利要求12所述的BMS休眠唤醒电路，其中，所述控制电路与所述采样电路连接，还用于在接收到所述拔枪信号时，关断所述自锁信号的输出。
  14. 一种BMS休眠唤醒方法，其中，包括：
    在充电设备接入时，响应所述充电设备接入产生使能电平使能BMS的唤醒芯片启动以唤醒BMS；
    产生自锁信号，所述自锁信号用于维持所述唤醒芯片在启动状态；
    若接收到休眠信号，则响应所述休眠信号停止输出所述自锁信号。
  15. 如权利要求14所述的BMS休眠唤醒方法，其中，所述自锁信号还用于禁止产生所述使能电平，并断开所述充电设备的接入。
  16. 一种BMS，其中，包括权利要求1至13任一项所述的BMS休眠唤醒电路。
  17. 一种用电设备，包括电池，其中，还包括权利要求16所述的BMS。
PCT/CN2023/123613 2022-11-24 2023-10-09 Bms休眠唤醒电路、方法、bms和用电设备 Ceased WO2024109359A1 (zh)

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