CN213243599U - BMS low-power consumption dormancy power supply control and awakening circuit - Google Patents
BMS low-power consumption dormancy power supply control and awakening circuit Download PDFInfo
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- CN213243599U CN213243599U CN202022195412.9U CN202022195412U CN213243599U CN 213243599 U CN213243599 U CN 213243599U CN 202022195412 U CN202022195412 U CN 202022195412U CN 213243599 U CN213243599 U CN 213243599U
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- 230000007958 sleep Effects 0.000 claims abstract description 22
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- 238000012544 monitoring process Methods 0.000 description 8
- 230000002093 peripheral effect Effects 0.000 description 5
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Abstract
The utility model discloses a BMS low-power consumption dormancy power supply control and wake-up circuit. The device comprises an output circuit, a first switch circuit, a second switch circuit, an MCU (microprogrammed control unit) micro control unit, a third switch circuit, a switch detection circuit, a charging wake-up circuit, a discharging wake-up circuit and a communication wake-up circuit. When the MCU judges that the system enters the dormant state, the power supply inlet Vin is cut off, so that the quiescent current of the whole system is not more than 50 uA. In the system sleep state, the system can be awakened to work through charging, discharging, physical switching, communication signals and external analog signals. The utility model discloses a high-efficient reliable dormancy-awaken up integration, the high complexity of BMS low-power consumption design has been solved, and is costly, high risk scheduling problem, has guaranteed simultaneously to awaken up the diversity of mode and in order to guarantee the work order under the various situations of system response.
Description
Technical Field
The utility model relates to the field of electronic technology, concretely relates to BMS low-power consumption dormancy power supply control and wake-up circuit.
Background
Conventional BMS (battery management system) DCDC powered chips have high quiescent power consumption, such as the typical DCDC buck MP2359, which can reach a quiescent current of 2mA, which is catastrophic for some small capacity batteries, and thus BMS must be designed for low power consumption to extend the standby time in non-operating state.
The traditional BMS generally adopts MCU software to control dormancy to reach the purpose of non-operating condition low-power consumption, along with coming battery system's wide use in recent years, different battery parameters, different operational environment have led to the fact very big test to the design of whole BMS circuit. Designers need to add a large number of devices in the peripheral circuit to cooperate with the MCU to realize an overall low power consumption environment, and design and production costs and product reliability cannot be effectively controlled even when the effect is not satisfactory. In addition, the peripheral wake-up circuit is also gradually complicated, and it is difficult to keep the compactness and high efficiency of the system while achieving the diversity of wake-up modes.
Disclosure of Invention
Not enough to prior art, the utility model discloses a BMS low-power consumption dormancy power supply control and wake-up circuit can solve prior art not enough.
In order to achieve the above purpose, the utility model discloses a following technical scheme realizes:
BMS low-power consumption dormancy power supply control and wake-up circuit, include
The output circuit is used for supplying power to the controlled circuit, and the output end of the output circuit is connected with the controlled circuit;
the first switch circuit is used for controlling the on-off of the output circuit according to a received signal, the input end of the first switch circuit is connected with a power supply inlet Vin, and the output end of the first switch circuit is connected with the output circuit;
the second switch circuit is used for controlling the on-off of the first switch circuit according to the received signal, the input end of the second switch circuit is grounded, and the output end of the second switch circuit is connected with the control end of the first switch circuit;
the MCU micro control unit is used for controlling the on-off of the second switch circuit according to the received signal, and a second switch enabling port of the MCU micro control unit is connected with the control end of the second switch circuit;
the third switch circuit is used for sending a signal and activating the first switch circuit, the input end of the third switch circuit is connected with a passive switch arranged on the ground, and the first output end of the third switch circuit is connected with the control end of the first switch circuit;
the switch detection circuit is used for detecting the passive switch state of the third switch circuit, the input end of the switch detection circuit is connected with the second output end of the third switch circuit, and the output end of the switch detection circuit is connected with the MCU;
the charging wake-up circuit is used for controlling the first switch circuit to be communicated in a charging process, a first input end of the charging wake-up circuit is connected with the positive electrode of a charger through a battery, a second input end of the charging wake-up circuit is connected with the negative electrode of the charger, a first output end of the charging wake-up circuit is connected with the control end of the first switch circuit, and a second output end of the charging wake-up circuit is grounded;
the discharging wake-up circuit is used for controlling the first switch circuit to be communicated in a discharging process, a first input end of the discharging wake-up circuit is connected with a load anode through a battery, a second input end of the discharging wake-up circuit is connected with a load cathode, a first output end of the discharging wake-up circuit is connected with a control end of the first switch circuit, and a second output end of the discharging wake-up circuit is grounded;
the communication awakening circuit is used for awakening the MCU according to the received signals, the input end of the communication awakening circuit is connected with an external MCU, and the output end of the communication awakening circuit is connected with the MCU.
According to the preferable technical scheme, the first switch circuit comprises a first switch, the source electrode of the first switch is connected with a power supply inlet Vin, the grid electrode of the first switch receives signals from the second switch circuit, the charging wake-up circuit and the discharging wake-up circuit, the drain electrode of the first switch is connected with the output circuit, and a first resistor is connected between the grid electrode of the first switch and the source electrode of the first switch.
According to the preferable technical scheme, the second switch circuit comprises a second switch, a collector of the second switch is connected with a grid electrode of the first switch through a fourth resistor, a base electrode of the second switch is connected with a second switch enabling port of the MCU through a fifth resistor, an emitter electrode of the second switch is grounded, and a pull-down sixth resistor is connected between the emitter electrode of the second switch and the base electrode of the second switch.
According to the preferable technical scheme, the charging wake-up circuit comprises a first optical coupler, the input end of the first optical coupler is connected with the positive electrode and the negative electrode of a charger through a battery, the first output end of the first optical coupler is grounded, and the second output end of the first optical coupler is connected with the grid electrode of the first switch through a fourth resistor.
According to the preferable technical scheme, the discharging awakening circuit comprises a second optical coupler, the input end of the second optical coupler is connected with the positive electrode and the negative electrode of a load through a battery, the first output end of the second optical coupler is grounded, and the second output end of the second optical coupler is connected with the grid electrode of the first switch through a fourth resistor.
In a preferred embodiment, the passive switch of the third switch circuit includes a third switch, one end of the third switch is grounded, the other end of the third switch is connected to the gate of the first switch via an RC circuit, and a non-grounded end of the third switch is connected to the switch detection circuit.
In a preferred technical solution, the RC circuit includes a third capacitor, an eighth resistor, a seventh resistor, and a protective second diode.
The utility model discloses a BMS low-power consumption dormancy power supply control and wake-up circuit has following advantage:
the control circuit realizes the complete power failure of most of modules in a dormant state by controlling the power supply inlet Vin through the first switch circuit and controlling the first switch circuit by other low-power-consumption circuits, and reduces the static power consumption to the lowest.
Due to the uniqueness of the output signals of the MCU, the second switch circuit integrates the signals output by the MCU, including the second signal, the sixth signal and the eighth signal, so that the independence of the signals is ensured, and meanwhile, the peripheral circuit is simplified.
The output circuit is used for ensuring the stability and stability of power supply. The control system integrally adopts the idea of main valve control, avoids the redundancy of circuit elements, and meanwhile, the control circuit has simple content, strong stability and high reliability, reduces the cost of integral wiring of the system and improves the flexibility of system design.
The wake-up circuit comprises charging, discharging, switching, communication and other extensible wake-up modes, and meets the normal use requirement of the BMS. The switch monitoring circuit monitors the on-off state of the third switch passive switch, sets an external human factor for system power failure, and can enter a low-power-consumption power failure state in advance.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a schematic block diagram of a system according to an embodiment of the present invention;
fig. 2 is a system schematic of an embodiment of the present invention;
fig. 3 is a flow chart illustrating the transition from the operating state to the sleep state according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating the transition from the sleep state to the working state according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are some, but not all embodiments of the present invention.
Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1 to 4, the embodiment of the present invention provides a BMS sleep power supply control and wake-up circuit.
In the control circuit aspect, the control circuit comprises: the circuit comprises a first switch circuit, a second switch circuit and an output circuit. The input end of the first switch circuit is connected with the power supply port Vin, the output end of the first switch circuit is connected with the output circuit, and the control end of the first switch circuit is connected with the second switch circuit, the third switch circuit, the charging wake-up circuit and the discharging wake-up circuit; the input end of the second switch circuit is grounded, the control end of the second switch circuit is connected with the MCU enabling port, and the output end of the second switch circuit is connected with the first switch circuit; the output end of the output circuit supplies power for the whole system, and the input end of the output circuit is connected with the first switch.
In the aspect of the wake-up circuit, the method comprises the following steps: the system comprises a third switch circuit, a charging wake-up circuit, a discharging wake-up circuit, a communication wake-up circuit and a switch monitoring circuit. The first output end of the third switch circuit is connected with the control end of the first switch circuit, the second output end of the third switch circuit is connected with the switch detection circuit, and the input end of the third switch circuit is grounded through a passive switch; the input end of the charging wake-up circuit is connected with the positive electrode and the negative electrode of the charger through a battery, and the output end of the charging wake-up circuit is connected with the control end of the first switch circuit; the input end of the discharge wake-up circuit is connected with the positive electrode and the negative electrode of the load through a battery, and the output low end of the discharge wake-up circuit is connected with the control end of the first switch circuit; the input end of the communication wake-up circuit is connected with an external signal input, and the output end of the communication wake-up circuit is connected with the MCU; the input end of the switch monitoring circuit is connected with the third switch circuit, and the output end of the switch monitoring circuit is connected with the MCU.
For convenience, the input signal of the second switch circuit is referred to as a first signal, the output signal of the second switch circuit is referred to as a second signal, the output signal of the third switch circuit is referred to as a third signal, the output signal of the charge wake-up circuit is referred to as a fourth signal, the output signal of the discharge wake-up circuit is referred to as a fifth signal, the output signal of the communication wake-up circuit is referred to as a sixth signal, the input signal of the switch detection circuit is referred to as a seventh signal, and other external signals capable of waking up the system are collectively referred to as eighth signals.
The first switch circuit is in a conducting state when and only when the control end receives a signal, the second switch circuit inputs a second signal, the third switch circuit inputs a third signal, the charging wake-up circuit inputs a fourth signal, and the discharging wake-up circuit inputs a fifth signal. When the first switch circuit is conducted, Vin is directly connected with the output circuit to supply power to the system; and when the mobile phone is in the sleep state, the first switch is in an off state.
The second switch circuit is switched on when and only when the control terminal receives the first signal, and is switched off when the control terminal is in a dormant state. When the system normally operates, the first signal is stably input, the second switch is in long-pass state, the first switch circuit is further kept in long-pass state, and the whole power supply of the system is stable. When the MCU judges that the MCU enters the sleep mode, the first signal is cut off, the second switch circuit is disconnected, the first switch circuit is disconnected, and the system is powered off.
And the output circuit is conducted with the power supply inlet Vin when and only when the first switch is conducted, so that the system is normally powered on, no external power supply is used during dormancy, and the whole system is powered off.
The third switch circuit includes a passive switch therein, and outputs the third signal for a brief period if and only if the passive switch is closed. And the first switching circuit is conducted when receiving the third signal, awakens the MCU, and stably outputs the first signal when the MCU is in a working state. After the third switch signal is cut off, the second switch circuit is conducted to output the second signal, so that the first switch circuit is conducted, and the system stably supplies power. The third switch circuit outputs the third signal to the control end of the first switch circuit within a short time when the passive switch is closed, and outputs no output signal to the input end of the switch monitoring circuit except for outputting a seventh signal to the input end of the switch monitoring circuit during the disconnection of the passive switch.
The charge wake-up circuit outputs the fourth signal if and only if a charging current is detected to be present within the system. The discharge wake-up circuit outputs the fifth signal if and only if a discharge current is detected to be present in the system. And when the system is connected with the upper computer, the communication awakening circuit awakens the MCU by power supply provided by the upper computer so as to output the first signal to enable the first switch circuit to be conducted. The eighth signal is that the system is additionally provided with a power supply interface of the MCU, and is not limited in theory. In principle, the MCU resumes power supply, and the system is stably powered on.
The switch monitoring circuit is used for detecting the passive switch state of the third switch circuit. And when the passive switch of the third switch circuit is disconnected, the eighth signal is received and fed back to the MCU, and the MCU receives the eighth signal input by the switch detection circuit on the premise that the MCU is in a working state and does not receive the sixth signal and the eighth signal, then the MCU judges that the MCU enters a sleep mode, stops outputting the first signal, and the second switch circuit is disconnected. At this time, if other signals including the fourth signal and the fifth signal exist at the control end of the first switch circuit, the first switch circuit is turned on, the power supply inlet continuously maintains the system power supply, and the MCU keeps the working state. And if the MCU receives the sixth signal or the eighth signal and simultaneously receives the seventh signal, the MCU maintains the output of the first signal, the second switch circuit is kept on, and the system supplies power normally.
The utility model discloses a control circuit, through first switch circuit control power supply entry Vin, other low-power consumption circuit control first switch circuit's mode has realized the thorough outage of most of modules under the dormant state, falls to static consumption to minimumly. Due to the uniqueness of the output signals of the MCU, the second switch circuit integrates the signals output by the MCU, including the second signal, the sixth signal and the eighth signal, so that the independence of the signals is ensured, and meanwhile, the peripheral circuit is simplified. The output circuit is used for ensuring the stability and stability of power supply. The control system integrally adopts the idea of main valve control, avoids the redundancy of circuit elements, and meanwhile, the control circuit has simple content, strong stability and high reliability, reduces the cost of integral wiring of the system and improves the flexibility of system design.
The utility model discloses a wake-up circuit, including charge, discharge, switch, communication and other extensible wake-up modes, satisfied BMS's normal use demand. The switch monitoring circuit monitors the on-off state of the third switch passive switch, sets an external human factor for system power failure, and can enter a low-power-consumption power failure state in advance.
In one embodiment, a system schematic block diagram is shown in FIG. 1.
The invention provides a power supply control circuit, which comprises a first switch circuit, a second switch circuit and an output circuit, wherein the first switch circuit is connected with the output circuit; a wake-up circuit is provided, which comprises a charging wake-up circuit, a discharging wake-up circuit, a communication wake-up circuit, a third switch circuit and an extended wake-up circuit.
In one embodiment, the system schematic is as in FIG. 2.
For the sake of simplicity, the MCU and the specific pin definitions, the general communication circuit structure, and the peripheral extension circuit are not labeled. The MCU employs an STM32F105RB model microprocessor manufactured by ST corporation. The first switch circuit main body is a P-type channel MOS tube Q1 called a first switch, the source of the first switch Q1 is connected with a power supply inlet Vin, the grid receives signals from the second switch circuit, the charging wake-up circuit and the discharging wake-up circuit, and the drain is connected with the output circuit. The first resistor R1 is connected between the gate and the source, and the third switch circuit is connected with the power supply inlet Vin through the first resistor R1. The second switch circuit main body is an NPN type triode Q2 called a second switch, a collector of the second switch Q2 is connected with a grid electrode of the first switch Q1 through a fourth resistor R4, a base electrode of the second switch Q2 is connected with an enabling port of the MCU second switch through a fifth resistor R5, an emitter electrode of the second switch Q2 is grounded, and a pull-down sixth resistor R6 is connected between the base electrode of the emitter electrode.
The input end of the output circuit is connected with the drain of the first switch Q1, the output end is connected with the system for supplying power, a protection resistor is arranged between the output circuit and the system, the protection resistor is called as a second resistor R2, and the conventional grounding protection is not repeated. The third switch circuit body is a one-way passive switch named as a third switch SW1, one end of the third switch is grounded, and the other end of the third switch passes through an RC circuit and comprises a third capacitor C3, an eighth resistor R8, a seventh resistor R7 and a protective second diode D2 which are connected with the grid electrode of the first switch. Meanwhile, the non-grounded end of the third switch SW1 is connected to the switch detection circuit. The input end of the switch detection circuit is connected with the third switch non-grounding end, the input end is connected with the MCU switch detection port, and the included general MCU input protection period is not repeated.
The charging wake-up circuit main body is an optical coupler element called a first optical coupler U1, the input end of the first optical coupler is connected with the positive electrode and the negative electrode of a charger through a battery, one end of the output end of the first optical coupler is grounded, and the other end of the first optical coupler is connected with the grid electrode of the first switch Q1 through the fourth resistor R4; the main body of the discharge wake-up circuit is an optical coupler element and is called a second optical coupler U2, the input end of the second optical coupler is connected with the anode and the cathode of a load through a battery, one end of the output end of the second optical coupler is grounded, and the other end of the second optical coupler is connected with the first switch grid through a fourth resistor R4.
In one embodiment, the flow chart of the system transitioning from the working state to the sleep state is shown in fig. 3.
When the MCU switch detection port inputs a high level, i.e., the third switch SW1 is turned off, the MCU will tend to determine to enter the sleep mode. Meanwhile, the communication wake-up circuit and the extension wake-up circuit have no signal input, the second switch enable port of the MCU outputs a low level, the second switch Q2 is switched off, the source voltage of the first switch Q1 is increased to the Vin level, the first switch Q1 is switched off, and the system is powered off and enters a sleep mode. When the MCU switch detection port inputs a low level, namely the third switch SW1 is conducted, the MCU enters the sleep timing under the conditions that the charging and discharging current, the communication signal and the extension signal are not detected. Obviously, the sleep time in different situations can be set by setting the MCU. After the MCU dormancy timing reaches the preset time, the second switch enabling port of the MCU outputs a low level, the second switch Q2 is switched off, the source voltage of the first switch Q1 is increased to a Vin level, the first switch Q1 is switched off, and the system is powered off and enters a dormancy mode. And during the preset time period of the MCU sleep timing tunnel, if a charge-discharge signal, a communication signal and an extension signal are detected, resetting and suspending the MCU sleep timing until the signals are not detected, namely restarting the sleep timing.
In one embodiment, the flow chart of the system from the sleep state to the working state is as shown in fig. 4.
The charging wake-up mode refers to that two ends of the charging wake-up circuit are connected with the positive electrode and the negative electrode of a charger through batteries, when the charger works, a charging current activates an optocoupler element U1, the resistance value of a photoresistor between the output ends of first optocouplers U1 is reduced, a low level is input into a PMOS _ EN input port, the voltage of a grid electrode of a first switch Q1 is reduced to the low level, and the first switch is switched on; the power supply inlet Vin supplies power to the MCU, the MCU enters a working state, the second switch enable port outputs a high level, the second switch Q2 is conducted, the grid of the first switch Q1 is stably input with low voltage, the first switch Q1 is stably conducted, and the system supplies power stably. The discharging wake-up mode refers to that two ends of the discharging wake-up circuit are connected with the positive pole and the negative pole of a load through a battery, when the load works, a discharging current activates an optocoupler element U2, the resistance value of a photoresistor between the output ends of the second optocoupler U2 is reduced, a low level is input into a PMOS _ EN input port, the voltage of a grid electrode of the first switch Q1 is reduced to the low level, and the first switch Q1 is switched on; the power supply inlet Vin supplies power to the MCU, the MCU enters a working state, the second switch enable port outputs a high level, the second switch Q2 is conducted, the grid of the first switch Q1 is stably input with low voltage, the first switch Q1 is stably conducted, and the system supplies power stably. The physical switch wake-up mode is that when the system is in a sleep state, the source and gate of the first switch Q1 are all kept at a high potential and are disconnected, at the moment that the third switch SW1 is closed, the third capacitor C3 can be regarded as a short circuit in a short time, the function of the large-resistor eighth resistor R8 is temporarily disconnected, so that the power supply inlet Vin is grounded through the first resistor R1, the second diode D2 and the seventh resistor R7, a significant voltage drop is generated at two ends of the first resistor R1, so that the gate voltage of the first switch Q1 is lower than the source voltage, and the first switch Q1 is switched on; the power supply inlet Vin supplies power to the MCU, the MCU enters a working state, the second switch enable port outputs a high level, the second switch Q2 is switched on, the grid of the first switch Q1 is stably input with low voltage, the first switch Q1 is stably switched on, and the system supplies power stably; the third capacitor C3 can be regarded as an open circuit state after being stabilized, and the input end of the switch detection circuit is connected with a low level. In an embodiment, the communication wake-up mode refers to that the USB interface supplies power to the MCU when the PC terminal of the BMS is connected to the system, the MCU enters a working state, the second switch enable port outputs a high level, the second switch Q2 is turned on, the gate of the first switch Q1 is stably input with a low voltage, the first switch Q1 is stably turned on, and the system supplies power stably.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (7)
- BMS low-power consumption dormancy power supply control and awaken circuit, its characterized in that: comprises thatThe output circuit is used for supplying power to the controlled circuit, and the output end of the output circuit is connected with the controlled circuit;the first switch circuit is used for controlling the on-off of the output circuit according to a received signal, the input end of the first switch circuit is connected with a power supply inlet Vin, and the output end of the first switch circuit is connected with the output circuit;the second switch circuit is used for controlling the on-off of the first switch circuit according to the received signal, the input end of the second switch circuit is grounded, and the output end of the second switch circuit is connected with the control end of the first switch circuit;the MCU micro control unit is used for controlling the on-off of the second switch circuit according to the received signal, and a second switch enabling port of the MCU micro control unit is connected with the control end of the second switch circuit;the third switch circuit is used for sending a signal and activating the first switch circuit, the input end of the third switch circuit is connected with a passive switch arranged on the ground, and the first output end of the third switch circuit is connected with the control end of the first switch circuit;the switch detection circuit is used for detecting the passive switch state of the third switch circuit, the input end of the switch detection circuit is connected with the second output end of the third switch circuit, and the output end of the switch detection circuit is connected with the MCU;the charging wake-up circuit is used for controlling the first switch circuit to be communicated in a charging process, a first input end of the charging wake-up circuit is connected with the positive electrode of a charger through a battery, a second input end of the charging wake-up circuit is connected with the negative electrode of the charger, a first output end of the charging wake-up circuit is connected with the control end of the first switch circuit, and a second output end of the charging wake-up circuit is grounded;the discharging wake-up circuit is used for controlling the first switch circuit to be communicated in a discharging process, a first input end of the discharging wake-up circuit is connected with a load anode through a battery, a second input end of the discharging wake-up circuit is connected with a load cathode, a first output end of the discharging wake-up circuit is connected with a control end of the first switch circuit, and a second output end of the discharging wake-up circuit is grounded;the communication awakening circuit is used for awakening the MCU according to the received signals, the input end of the communication awakening circuit is connected with an external MCU, and the output end of the communication awakening circuit is connected with the MCU.
- 2. The BMS low-power sleep power control and wake-up circuit of claim 1, wherein: the first switch circuit comprises a first switch, the source electrode of the first switch is connected with a power supply inlet Vin, the grid electrode of the first switch receives signals from the second switch circuit, the charging wake-up circuit and the discharging wake-up circuit, the drain electrode of the first switch is connected with the output circuit, and a first resistor is connected between the grid electrode of the first switch and the source electrode of the first switch.
- 3. The BMS low-power sleep power control and wake-up circuit of claim 2, wherein: the second switch circuit comprises a second switch, a collector of the second switch is connected with a grid electrode of the first switch through a fourth resistor, a base of the second switch is connected with a second switch enabling port of the MCU through a fifth resistor, an emitter of the second switch is grounded, and a pull-down sixth resistor is connected between the emitter of the second switch and the base of the second switch.
- 4. The BMS low power sleep power control and wake-up circuit of claim 3, wherein: the charging wake-up circuit comprises a first optocoupler, wherein the input end of the first optocoupler is connected with the positive electrode and the negative electrode of a charger through a battery, the first output end of the first optocoupler is grounded, and the second output end of the first optocoupler is connected with the grid electrode of the first switch through a fourth resistor.
- 5. The BMS low power sleep power control and wake-up circuit of claim 3, wherein: the discharge awakening circuit comprises a second optical coupler, the input end of the second optical coupler is connected with the positive electrode and the negative electrode of the load through a battery, the first output end of the second optical coupler is grounded, and the second output end of the second optical coupler is connected with the grid of the first switch through a fourth resistor.
- 6. The BMS low-power sleep power control and wake-up circuit of claim 2, wherein: the passive switch of the third switch circuit comprises a third switch, one end of the third switch is grounded, the other end of the third switch is connected with the grid electrode of the first switch through an RC circuit, and the non-grounded end of the third switch is connected with the switch detection circuit.
- 7. The BMS low-power sleep power control and wake-up circuit of claim 6, wherein: the RC circuit comprises a third capacitor, an eighth resistor, a seventh resistor and a protective second diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022195412.9U CN213243599U (en) | 2020-09-30 | 2020-09-30 | BMS low-power consumption dormancy power supply control and awakening circuit |
Applications Claiming Priority (1)
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