A wake-up circuit, a wake-up method, an energy storage system and a control method

Abstract

The present invention relates to a wake-up circuit, a wake-up method, an energy storage system and a control method, wherein the wake-up circuit includes an energy supply end, a wake-up drive module and a module to be awakened, and the wake-up drive circuit includes a first triode, a first transistor, a first resistor, a second resistor, a capacitor and an optical coupler; the emitter of the first triode is electrically connected to the positive electrode of the energy supply end, the collector is electrically connected to the first end of the first transistor, and the base is electrically connected to the first resistor, the capacitor and the negative electrode of the energy supply end in sequence; the midpoint of the first resistor and the capacitor is electrically connected to the gate of the first transistor; the second end of the first transistor is electrically connected to the anode of the optical coupler, and the gate is electrically connected to the second resistor and the negative electrode of the energy supply end in sequence; the cathode of the optical coupler is electrically connected to the negative electrode of the energy supply end, and the receiving end is electrically connected to the module to be awakened. The present invention can not only realize a single wake-up of the rear-stage circuit, eliminate the huge power consumption generated by continuous wake-up, but also can repeatedly wake up in a short time, effectively reducing costs.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to a wake-up circuit, a wake-up method, an energy storage system and a control method. Background Art

[0002] Battery wake-up circuits are widely used in electric vehicles, energy storage systems, and various smart devices. In the field of electric vehicles, wake-up circuits can significantly reduce energy consumption and improve endurance efficiency, especially in the case of frequent starting and stopping in urban driving. In energy storage systems, this technology can improve energy scheduling efficiency and meet users' real-time needs for power supply. In addition, in smart devices, wake-up circuits also help improve the response speed and overall performance of the device.

[0003] However, in actual use, there are the following shortcomings:

[0004] 1. Most of them adopt the principle of capacitor charging short circuit and full-charge disconnection to wake up the subsequent circuit and achieve single wake-up to reduce power consumption, but ignore or fail to solve the problem of capacitor discharge, which will cause the wake-up circuit to be unable to be used again before the capacitor is completely consumed, or the wake-up circuit cannot be used frequently in a short time;

[0005] 2. In order to achieve the effect of fast response of the wake-up circuit (on and off), some circuits do not use capacitors, but directly use continuous level signals to trigger the wake-up of the subsequent circuit. Single wake-up cannot be achieved, resulting in increased circuit power consumption.

[0006] Therefore, it is necessary to provide a wake-up circuit, wake-up method, energy storage system and control method that can realize single wake-up and repeated wake-up in a short time, reduce power consumption and improve functionality. Summary of the invention

[0007] In order to overcome the deficiencies of the prior art, the present invention provides a wake-up circuit, a wake-up method, an energy storage system and a control method.

[0008] The technical solution of the present invention is as follows:

[0009] A wake-up circuit, comprising an energy supply end, a wake-up drive module and a to-be-awakened module, wherein the wake-up drive module comprises a first triode Q1, a first transistor Q2, a first resistor R1, a second resistor R2, a capacitor C1 and an optical coupler U1, wherein the emitter of the first triode Q1 is electrically connected to the positive electrode of the energy supply end, the collector of the first triode Q1 is electrically connected to the first end of the first transistor Q2, the base of the first triode Q1 is electrically connected to the first resistor R1, the capacitor C1 and the negative electrode of the energy supply end in sequence, the midpoint of the first resistor R1 and the capacitor C1 is electrically connected to the first The gate of transistor Q2, the second end of the first transistor Q2 is electrically connected to the anode of the transmitting end of the optocoupler U1, the gate of the first transistor Q2 is electrically connected to the second resistor R2 and the negative electrode of the energy supply end in sequence, the cathode of the transmitting end of the optocoupler U1 is electrically connected to the negative electrode of the energy supply end, the receiving end of the optocoupler U1 is electrically connected to the wake-up module, the input voltage of the energy supply end is V1, the threshold voltage of the first transistor Q2 is V2, the resistance of the first resistor R1 is r1, and the resistance of the second resistor R2 is r2, satisfying: V1*r1 / (r1+r2)<V2.

[0010] As a further improvement of the present invention, the resistance values ​​of the first resistor R1 and the second resistor R2 are both adjustable, and a third resistor R3 is provided between the cathode of the transmitting end of the optical coupler U1 and the negative electrode of the energy supply end.

[0011] A wake-up method based on the above wake-up circuit, the wake-up method comprising:

[0012] S1: The energy supply end supplies power to the wake-up drive module, the first transistor Q1 is turned on, the capacitor C1 is charged, the first transistor Q2 is turned on, the transmitting end of the optical coupler U1 is powered, and the receiving end is turned on and wakes up the module to be awakened;

[0013] S2: After the capacitor C1 is fully charged, the first transistor Q2 is turned off and the optocoupler U1 is disconnected;

[0014] S3: After the energy supply end stops supplying power to the wake-up driving module, the first transistor Q1 is turned off, and the capacitor C1 is discharged.

[0015] An energy storage system includes an inverter, a wake-up circuit as described above, a control circuit, and an energy storage module, wherein the inverter is electrically connected to the wake-up circuit, the control circuit, and the energy storage module, respectively, the wake-up circuit is electrically connected to the control circuit, and the control circuit is electrically connected to the energy storage module.

[0016] As a further improvement of the present invention, the control circuit includes a battery management unit BMS, a microcontroller unit MCU, a second transistor Q3, a second triode Q4, a third transistor Q5, and a fourth transistor Q6, wherein the first end of the second transistor Q3 is electrically connected to the positive electrode of the inverter and the positive electrode of the energy storage module, respectively, the second end of the second transistor Q3 is electrically connected to the battery management unit BMS and the negative electrode of the energy storage module in sequence, the gate of the second transistor Q3 is electrically connected to the collector of the second triode Q4, the emitter of the receiving end of the optical coupler U1 is electrically connected to the base of the second triode Q4 and the negative electrode of the energy storage module, and the receiving end of the optical coupler U1 is electrically connected to the base of the second triode Q4 and the negative electrode of the energy storage module, respectively. The collector of the second transistor Q4 is electrically connected to the positive electrode of the energy storage module, the emitter of the second transistor Q4 is electrically connected to the negative electrode of the energy storage module, the enable end of the micro control unit MCU is electrically connected to the base of the second transistor Q4, the drive end of the micro control unit MCU is electrically connected to the gate of the third transistor Q5 and the gate of the fourth transistor Q6 respectively, the first end of the third transistor Q5 is electrically connected to the negative electrode of the inverter, the second end of the third transistor Q5 is electrically connected to the first end of the fourth transistor Q6, the second end of the fourth transistor Q6 is electrically connected to the negative electrode of the energy storage module, and the battery management unit BMS is electrically connected to the micro control unit MCU.

[0017] As a further improvement of the present invention, the control circuit also includes a third transistor Q7 and a fourth resistor R4, the first end of the fourth resistor R4 is electrically connected to the micro control unit MCU, the second end of the fourth resistor R4 and the collector of the third transistor Q7 are both electrically connected to the feedback end of the micro control unit MCU, the emitter of the third transistor Q7 is electrically connected to the negative electrode of the energy storage module, and the base of the third transistor Q7 is respectively electrically connected to the emitter of the receiving end of the optocoupler U1 and the enable end of the micro control unit MCU.

[0018] As a further improvement of the present invention, a fifth resistor R5 is provided between the collector of the receiving end of the optocoupler U1 and the positive electrode of the energy storage module, a sixth resistor R6 is provided between the gate of the second transistor Q3 and the collector of the second triode Q4, a second diode D2 and a tenth resistor R10 are provided between the emitter of the receiving end of the optocoupler U1 and the base of the second triode Q4, the anode of the second diode D2 is electrically connected to the emitter of the receiving end of the optocoupler U1, and the cathode of the second diode D2 is electrically connected to the tenth resistor R10, an eighth resistor R8 is provided between the emitter of the receiving end of the optocoupler U1 and the base of the third triode Q7, a ninth resistor R9 is provided between the emitter of the receiving end of the optocoupler U1 and the negative electrode of the energy storage module, a first diode D1 and a seventh resistor R7 are provided between the enable end of the micro control unit MCU and the base of the second triode Q4, the anode of the first diode D1 is electrically connected to the seventh resistor R7, and the cathode of the first diode D1 is electrically connected to the cathode of the second diode D2.

[0019] As a further improvement of the present invention, the control circuit also includes a current sampling module, which collects the current between the second end of the fourth transistor Q6 and the negative electrode of the energy storage module, and the current sampling module is electrically connected to the detection end of the micro control unit MCU.

[0020] A control method based on the energy storage system as described above, the control method comprising:

[0021] T1: the inverter supplies power to the wake-up circuit, turns on the optocoupler U1, turns on the second transistor Q4, and guides the second transistor Q3 to turn on, the energy storage module supplies power to the battery management unit BMS, and the microcontroller unit MCU is powered and outputs an enable signal to the base of the second transistor Q4, and the second transistor Q4 remains in the on state;

[0022] T2: the optical coupler U1 is disconnected, the microcontroller unit MCU outputs a driving signal to drive the third transistor Q5 and the fourth transistor Q6 to be turned on at the same time, and the inverter charges the energy storage module;

[0023] T3: the inverter is powered off, the inverter stops charging the energy storage module, the micro control unit MCU stops outputting the enable signal, the second transistor Q4 is turned off, and the second transistor Q3 is turned off, the battery management unit BMS is powered off, the micro control unit MCU is powered off, and the third transistor Q5 and the fourth transistor Q6 are turned off.

[0024] As a further improvement of the present invention, in step T1, after the micro control unit MCU is powered, the feedback end of the micro control unit MCU obtains a voltage signal, and when the voltage signal changes, the micro control unit MCU outputs an enable signal to the base of the second transistor Q4;

[0025] In step T2, the microcontroller unit MCU obtains the current value of the charging circuit of the energy storage module in real time;

[0026] In step T3, when no current flows through the charging circuit, the micro control unit MCU stops outputting the enable signal.

[0027] According to the present invention of the above scheme, the beneficial effects of the present invention are:

[0028] The present invention provides a wake-up circuit, a wake-up method, an energy storage system and a control method, which can not only realize single wake-up of the subsequent circuit to eliminate the huge power consumption caused by continuous wake-up, but also can realize repeated wake-up in a short time, and can improve functionality while reducing power consumption, thereby effectively reducing costs; the control circuit at the subsequent stage can realize self-locking after the wake-up circuit transmits a wake-up signal, and can cut off power when the inverter is not working, thereby reducing standby power consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the wake-up circuit of the present invention;

[0030] Figure 2 is a flow chart of the wake-up method of the present invention;

[0031] Figure 3 It is a structural schematic diagram of the energy storage system of the present invention;

[0032] Figure 4 It is a structural schematic diagram of the control circuit of the present invention;

[0033] Figure 5 is a flow chart of a first embodiment of a control method of the present invention;

[0034] Figure 6 is a flow chart of the second embodiment of the control method of the present invention. DETAILED DESCRIPTION

[0035] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0038] See also Figure 1The present invention provides a wake-up circuit, including an energy supply end, a wake-up drive module and a to-be-awakened module, wherein the wake-up drive module includes a first triode Q1, a first transistor Q2, a first resistor R1, a second resistor R2, a capacitor C1 and an optical coupler U1, wherein the emitter of the first triode Q1 is electrically connected to the positive electrode of the energy supply end, the collector of the first triode Q1 is electrically connected to the first end of the first transistor Q2, the base of the first triode Q1 is electrically connected to the first resistor R1, the capacitor C1 and the negative electrode of the energy supply end in sequence, the midpoint of the first resistor R1 and the capacitor C1 is electrically connected to the gate of the first transistor Q2, the second end of the first transistor Q2 is electrically connected to the anode of the emitter end of the optical coupler U1, the gate of the first transistor Q2 is electrically connected to the second resistor R2 and the negative electrode of the energy supply end in sequence, the cathode of the emitter end of the optical coupler U1 is electrically connected to the supply end, and the cathode of the emitter end of the optical coupler U1 is electrically connected to the supply end. The negative electrode of the energy end is electrically connected, the receiving end of the optical coupler U1 is electrically connected to the module to be awakened, the input voltage of the energy supply end is V1, the threshold voltage of the first transistor Q2 is V2, the resistance value of the first resistor R1 is r1, and the resistance value of the second resistor R2 is r2, satisfying: V1*r1 / (r1+r2)<V2, that is, when the capacitor C1 is fully charged, the gate voltage of the first transistor Q2 is less than its turn-on threshold voltage, thereby turning off the first transistor Q2 to achieve a single wake-up. When the energy supply end stops supplying power, the capacitor C1 can be quickly discharged through the second resistor R2 to prepare for the next wake-up. The present invention can not only realize a single wake-up of the post-stage circuit and eliminate the huge power consumption generated by continuous wake-up, but also can be repeatedly awakened in a short time, while reducing power consumption, it can also improve functionality and effectively reduce costs.

[0039] As an embodiment of the present invention, the resistance value of the first resistor R1 and the resistance value of the second resistor R2 are both adjustable. By adjusting the resistance values ​​of the first resistor R1 and the second resistor R2, the discharge speed of the capacitor C1 can be adjusted, thereby meeting various usage requirements and effectively improving the usage range of the wake-up circuit. It has the characteristic of wide adaptability. A third resistor R3 is provided between the cathode of the transmitting end of the optocoupler U1 and the negative electrode of the energy supply end. During operation, the optocoupler U1 can be effectively reduced in voltage to avoid damage caused by excessive voltage at both ends of the transmitting end of the optocoupler U1. At the same time, the resistance value of the third resistor R3 is also adjustable and can be selected according to the rated voltage of the optocoupler U1.

[0040] See also Figure 2 The present invention provides a wake-up method, the wake-up method comprising:

[0041] S1: The energy supply end supplies power to the wake-up drive module, the first transistor Q1 is turned on, and the energy supply end charges the capacitor C1. At this time, the capacitor C1 is approximately short-circuited, and the voltage of the gate of the first transistor Q2 is higher than its turn-on threshold voltage. Therefore, the first transistor Q2 is turned on, and the energy supply end forms a conduction loop with the optical coupler U1. The transmitting end of the optical coupler U1 is powered, and the receiving end is turned on and wakes up the module to be awakened;

[0042] S2: After the capacitor C1 is fully charged, the capacitor C1 is approximately disconnected, and the voltage of the gate of the first transistor Q2 is lower than its conduction threshold voltage, so the first transistor Q2 is turned off, and the voltage of the energy supply end is only applied to the first transistor Q1, the first resistor R1 and the second resistor R2, and the conduction loop between the energy supply end and the optical coupler U1 is disconnected, so that the transmitting end of the optical coupler U1 is powered off, resulting in the disconnection of the receiving end of the optical coupler U1, which can realize a single wake-up of the wake-up module and avoid huge power consumption;

[0043] S3: After the energy supply end stops supplying power to the wake-up drive module, the first transistor Q1 is turned off, and the capacitor C1 is discharged through the second resistor R2 to prepare for the next wake-up. That is, at this time, except for the capacitor C1 and the second resistor R2, all other components stop working.

[0044] The present invention wakes up the module to be awakened when the capacitor C1 is charging, and stops waking up the module to be awakened when the capacitor C1 is fully charged, so as to achieve a single awakening of the module to be awakened, avoid huge power consumption caused by long-term awakening of the module to be awakened, and effectively reduce costs. When the energy supply end stops supplying power, the capacitor C1 is discharged, and all the electric energy contained in the capacitor C1 is released through the second resistor R2. When waking up next time, the energy supply end can continue to charge the capacitor C1 to make it approximately short-circuited, thereby not affecting the conduction of the first transistor Q2, and realizing the function of multiple awakenings.

[0045] See also Figure 3 The present invention provides an energy storage system, including an inverter, the above-mentioned wake-up circuit, a control circuit and an energy storage module. The inverter is electrically connected to the wake-up circuit, the control circuit and the energy storage module respectively, the wake-up circuit is electrically connected to the control circuit, the control circuit is electrically connected to the energy storage module, the inverter supplies power to the wake-up circuit, the wake-up circuit wakes up the control circuit, and the inverter charges the energy storage module.

[0046] As an embodiment of the present invention, the inverter is a photovoltaic inverter, which can charge the energy storage module when the weather is clear, stop charging when the weather is cloudy and enter a standby sleep state as a whole, thereby avoiding unnecessary power consumption.

[0047] Lieutenant General Figure 4As an embodiment of the present invention, the control circuit includes a battery management unit BMS, a micro control unit MCU, a second transistor Q3, a second triode Q4, a third transistor Q5, and a fourth transistor Q6. Preferably, the second transistor Q3 is a PMOS tube, the first end of the second transistor Q3 is electrically connected to the positive electrode of the inverter and the positive electrode of the energy storage module respectively, the second end of the second transistor Q3 is electrically connected to the battery management unit BMS and the negative electrode of the energy storage module in sequence, the gate of the second transistor Q3 is electrically connected to the collector of the second triode Q4, the emitter of the receiving end of the optical coupler U1 is electrically connected to the base of the second triode Q4 and the negative electrode of the energy storage module respectively, the collector of the receiving end of the optical coupler U1 is electrically connected to the positive electrode of the energy storage module, the emitter of the second triode Q4 is electrically connected to the negative electrode of the energy storage module, and the enable end of the micro control unit MCU is electrically connected to the positive electrode of the energy storage module. The base of the second transistor Q4 is electrically connected, the driving end of the micro control unit MCU is electrically connected to the gate of the third transistor Q5 and the gate of the fourth transistor Q6 respectively, the first end of the third transistor Q5 is electrically connected to the negative electrode of the inverter, the second end of the third transistor Q5 is electrically connected to the first end of the fourth transistor Q6, the second end of the fourth transistor Q6 is electrically connected to the negative electrode of the energy storage module, the battery management unit BMS is electrically connected to the micro control unit MCU, and the control circuit can output an enable signal to the second transistor Q4 through the enable end of the micro control unit MCU after the wake-up circuit transmits the wake-up signal, thereby replacing the conduction signal generated by the conduction of the optocoupler U1, realizing self-locking of the control circuit, and when the inverter is not working, the battery management unit BMS and the micro control unit MCU are powered off, waiting for the next wake-up signal, thereby reducing standby power consumption.

[0048] As an embodiment of the present invention, the control circuit also includes a third transistor Q7 and a fourth resistor R4, the first end of the fourth resistor R4 is electrically connected to the micro control unit MCU, the second end of the fourth resistor R4 and the collector of the third transistor Q7 are both electrically connected to the feedback end of the micro control unit MCU, the emitter of the third transistor Q7 is electrically connected to the negative electrode of the energy storage module, and the base of the third transistor Q7 is electrically connected to the emitter of the receiving end of the optocoupler U1 and the enable end of the micro control unit MCU respectively. After the micro control unit MCU is powered on, the feedback end starts to obtain a level signal, and when the third transistor After the tube Q7 is turned on, the level of the feedback end of the microcontroller unit MCU is pulled down, so that the feedback end of the microcontroller unit MCU obtains a low level, and the microcontroller unit MCU controls the enable end to output an enable signal to the second transistor Q4. Through the cooperation of the fourth resistor R4 and the third transistor Q7, the enable signal output by the microcontroller unit MCU can be quickly fed back, so that the enable signal can timely replace the conduction signal generated by the conduction of the optocoupler U1, thereby realizing self-locking of the control circuit, avoiding the risk of self-locking failure of the control circuit due to slow output of the enable signal, and improving the overall working stability and reliability.

[0049] As an embodiment of the present invention, a fifth resistor R5 is provided between the collector of the receiving end of the optocoupler U1 and the positive electrode of the energy storage module, a sixth resistor R6 is provided between the gate of the second transistor Q3 and the collector of the second triode Q4, a second diode D2 and a tenth resistor R10 are provided between the emitter of the receiving end of the optocoupler U1 and the base of the second triode Q4, the anode of the second diode D2 is electrically connected to the emitter of the receiving end of the optocoupler U1, the cathode of the second diode D2 is electrically connected to the tenth resistor R10, an eighth resistor R8 is provided between the emitter of the receiving end of the optocoupler U1 and the base of the third triode Q7, and an eighth resistor R8 is provided between the emitter of the receiving end of the optocoupler U1 and the negative electrode of the energy storage module. The ninth resistor R9, the first diode D1 and the seventh resistor R7 are provided between the enable end of the microcontroller unit MCU and the base of the second transistor Q4, the anode of the first diode D1 is electrically connected to the seventh resistor R7, the cathode of the first diode D1 is electrically connected to the cathode of the second diode D2, the fifth resistor R5, the sixth resistor R6, the seventh resistor R7, the eighth resistor R8, the ninth resistor R9, and the tenth resistor R10 all have a voltage reduction function to avoid damage to the diodes, transistors, and transistors, and improve the overall safety and reliability. The first diode D1 and the second diode D2 are both used to prevent reverse current flow to avoid unnecessary influence on the control of the control circuit.

[0050] As an embodiment of the present invention, the control circuit also includes a current sampling module, which collects the current of the charging circuit of the energy storage module. Preferably, the current sampling module collects the current between the second end of the fourth transistor Q6 and the negative electrode of the energy storage module. The current sampling module is electrically connected to the detection end of the micro control unit MCU. When the current sampling module does not collect the current, the micro control unit MCU stops outputting the enable signal, and the control circuit is powered off, thereby improving the controllability, working safety and reliability of the control circuit.

[0051] See also Figure 5 The present invention provides a first embodiment of a control method, the control method comprising:

[0052] T1: The inverter supplies power to the wake-up circuit, turns on the optocoupler U1, turns on the second transistor Q4, and guides the second transistor Q3 to turn on. The energy storage module supplies power to the battery management unit BMS. At this time, the microcontroller MCU is powered and outputs an enable signal to the base of the second transistor Q4. The second transistor Q4 remains in the on state;

[0053] T2: the optocoupler U1 is disconnected, the microcontroller unit MCU outputs a driving signal to drive the third transistor Q5 and the fourth transistor Q6 to be turned on at the same time, and the inverter charges the energy storage module;

[0054] T3: The inverter is powered off, the inverter stops charging the energy storage module, the microcontroller unit MCU stops outputting the enable signal, the second transistor Q4 is turned off, and the second transistor Q3 is turned off, the battery management unit BMS is powered off, the microcontroller unit MCU is powered off, and the third transistor Q5 and the fourth transistor Q6 are turned off.

[0055] See also Figure 6 The present invention provides a second embodiment of a control method, the control method comprising:

[0056] T1: The inverter supplies power to the wake-up circuit, that is, the wake-up circuit works in S1, the optocoupler U1 is turned on, the second transistor Q4 and the third transistor Q7 are turned on, wherein the second transistor Q4 guides the second transistor Q3 to turn on, and the energy storage module supplies power to the battery management unit BMS. After the battery management unit BMS is powered on, the third transistor Q7 gives a feedback signal to the microcontroller MCU, which is used to prompt the microcontroller MCU that the wake-up circuit is about to be closed at this time, and quickly outputs an enable signal. Subsequently, the microcontroller MCU is powered on and outputs an enable signal to the base of the second transistor Q4. The enable signal replaces the conduction signal generated by the conduction of the optocoupler U1, so that the second transistor Q4 maintains the conduction state and realizes self-locking;

[0057] T2: The wake-up circuit works in S2, and the optocoupler U1 is disconnected. At this time, the battery management unit BMS has been successfully awakened and self-locked. The microcontroller MCU outputs a drive signal to drive the third transistor Q5 and the fourth transistor Q6 to be turned on at the same time. The negative electrode of the inverter is electrically connected to the negative electrode of the energy storage module, so that the inverter and the energy storage module are successfully connected. The inverter charges the energy storage module. At the same time, the current sampling circuit collects the current of the charging circuit of the energy storage module in real time and feeds it back to the microcontroller MCU;

[0058] T3: The inverter is powered off and stops charging the energy storage module, that is, the wake-up circuit works in S3. The current sampling circuit detects that there is no current flowing through the charging circuit of the energy storage module. Then the microcontroller unit MCU stops outputting the enable signal, the second transistor Q4 is turned off, and the second transistor Q3 is turned off, the battery management unit BMS is powered off, the microcontroller unit MCU is powered off, the third transistor Q5 and the fourth transistor Q6 are turned off, and wait for the next wake-up to reduce standby power consumption.

[0059] In summary, the present invention provides a wake-up circuit, a wake-up method, an energy storage system and a control method, which can not only realize a single wake-up of the subsequent circuit and eliminate the huge power consumption caused by continuous wake-up, but also can realize repeated wake-up in a short time, and can improve functionality while reducing power consumption, thereby effectively reducing costs; by adjusting the resistance values ​​of the first resistor R1 and the second resistor R2, the discharge speed of the capacitor C1 can be adjusted, thereby being able to meet a variety of usage requirements, effectively improving the use scope of the wake-up circuit, and having the characteristics of wide adaptability; the control circuit can output an enable signal to the second transistor Q4 through the enable terminal of the microcontroller unit MCU after the wake-up circuit transmits the wake-up signal, thereby replacing the conduction generated by the conduction of the optocoupler U1. signal to realize self-locking of the control circuit, and when the inverter is not working, the battery management unit BMS and the microcontroller unit MCU are powered off and wait for the next wake-up signal, thereby reducing standby power consumption; through the cooperation of the fourth resistor R4 and the third transistor Q7, the microcontroller unit MCU can quickly feedback the output enable signal of the microcontroller unit MCU, so as to timely replace the turn-on signal generated by the turn-on of the optocoupler U1 with the enable signal to realize self-locking of the control circuit, avoid the risk of self-locking failure of the control circuit due to slow output of the enable signal, and improve the overall working stability and reliability; the current sampling module collects the current of the charging circuit of the energy storage module in real time and feeds it back to the microcontroller unit MCU, effectively improving the controllability, working safety and reliability of the control circuit.

[0060] It should be emphasized that the above are only preferred embodiments of the present invention and do not limit the present invention in any form. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A wake-up circuit, characterized in that: It includes an energy supply end, a wake-up drive module and a to-be-awakened module, wherein the wake-up drive module includes a first triode Q1, a first transistor Q2, a first resistor R1, a second resistor R2, a capacitor C1 and an optical coupler U1, wherein the emitter of the first triode Q1 is electrically connected to the positive electrode of the energy supply end, the collector of the first triode Q1 is electrically connected to the first end of the first transistor Q2, the base of the first triode Q1 is electrically connected to the first resistor R1, the capacitor C1 and the negative electrode of the energy supply end in sequence, the midpoint of the first resistor R1 and the capacitor C1 is electrically connected to the gate of the first transistor Q2, the second end of the first transistor Q2 is electrically connected to the anode of the emitter end of the optical coupler U1, and the The gate of the first transistor Q2 is electrically connected to the second resistor R2 and the negative electrode of the energy supply end in sequence, the cathode of the transmitting end of the optocoupler U1 is electrically connected to the negative electrode of the energy supply end, the receiving end of the optocoupler U1 is electrically connected to the module to be awakened, the input voltage of the energy supply end is V1, the threshold voltage of the first transistor Q2 is V2, the resistance of the first resistor R1 is r1, and the resistance of the second resistor R2 is r2, satisfying: V1*r1 / (r1+r2)<V2, after the capacitor C1 is fully charged, the first transistor Q2 is turned off, the optocoupler U1 is disconnected, and after the energy supply end stops supplying power to the wake-up drive module, the first transistor Q1 is turned off, and the capacitor C1 is discharged.

2. The wake-up circuit according to claim 1, characterized in that: The resistance values ​​of the first resistor R1 and the second resistor R2 are both adjustable, and a third resistor R3 is provided between the cathode of the transmitting end of the optical coupler U1 and the negative electrode of the energy supply end.

3. A wake-up method based on the wake-up circuit according to claim 1 or 2, characterized in that: The wake-up method comprises: S1: The energy supply end supplies power to the wake-up drive module, the first transistor Q1 is turned on, the capacitor C1 is charged, the first transistor Q2 is turned on, the transmitting end of the optical coupler U1 is powered, and the receiving end is turned on and wakes up the module to be awakened; S2: After the capacitor C1 is fully charged, the first transistor Q2 is turned off and the optocoupler U1 is disconnected; S3: After the energy supply end stops supplying power to the wake-up driving module, the first transistor Q1 is turned off, and the capacitor C1 is discharged.

4. An energy storage system, characterized in that: It includes an inverter, a wake-up circuit as claimed in claim 1 or 2, a control circuit and an energy storage module, the inverter is electrically connected to the wake-up circuit, the control circuit and the energy storage module respectively, the wake-up circuit is electrically connected to the control circuit, and the control circuit is electrically connected to the energy storage module.

5. The energy storage system according to claim 4, characterized in that: The control circuit includes a battery management unit BMS, a microcontroller unit MCU, a second transistor Q3, a second triode Q4, a third transistor Q5, and a fourth transistor Q6. The first end of the second transistor Q3 is electrically connected to the positive electrode of the inverter and the positive electrode of the energy storage module respectively. The second end of the second transistor Q3 is electrically connected to the battery management unit BMS and the negative electrode of the energy storage module in sequence. The gate of the second transistor Q3 is electrically connected to the collector of the second triode Q4. The emitter of the receiving end of the optical coupler U1 is electrically connected to the base of the second triode Q4 and the negative electrode of the energy storage module respectively. The collector of the receiving end of the optical coupler U1 is electrically connected to the base of the second triode Q4 and the negative electrode of the energy storage module. The positive electrode of the energy storage module is electrically connected, the emitter of the second transistor Q4 is electrically connected to the negative electrode of the energy storage module, the enable end of the micro control unit MCU is electrically connected to the base of the second transistor Q4, the driving end of the micro control unit MCU is electrically connected to the gate of the third transistor Q5 and the gate of the fourth transistor Q6, respectively, the first end of the third transistor Q5 is electrically connected to the negative electrode of the inverter, the second end of the third transistor Q5 is electrically connected to the first end of the fourth transistor Q6, the second end of the fourth transistor Q6 is electrically connected to the negative electrode of the energy storage module, and the battery management unit BMS is electrically connected to the micro control unit MCU.

6. The energy storage system according to claim 5, characterized in that: The control circuit also includes a third transistor Q7 and a fourth resistor R4, the first end of the fourth resistor R4 is electrically connected to the micro control unit MCU, the second end of the fourth resistor R4 and the collector of the third transistor Q7 are both electrically connected to the feedback end of the micro control unit MCU, the emitter of the third transistor Q7 is electrically connected to the negative electrode of the energy storage module, and the base of the third transistor Q7 is electrically connected to the emitter of the receiving end of the optocoupler U1 and the enable end of the micro control unit MCU, respectively.

7. The energy storage system according to claim 6, characterized in that: A fifth resistor R5 is provided between the collector of the receiving end of the optocoupler U1 and the positive electrode of the energy storage module, a sixth resistor R6 is provided between the gate of the second transistor Q3 and the collector of the second triode Q4, a second diode D2 and a tenth resistor R10 are provided between the emitter of the receiving end of the optocoupler U1 and the base of the second triode Q4, an anode of the second diode D2 is electrically connected to the emitter of the receiving end of the optocoupler U1, and a cathode of the second diode D2 is electrically connected to the tenth resistor R10, an eighth resistor R8 is provided between the emitter of the receiving end of the optocoupler U1 and the base of the third triode Q7, a ninth resistor R9 is provided between the emitter of the receiving end of the optocoupler U1 and the negative electrode of the energy storage module, a first diode D1 and a seventh resistor R7 are provided between the enable end of the micro control unit MCU and the base of the second triode Q4, an anode of the first diode D1 is electrically connected to the seventh resistor R7, and a cathode of the first diode D1 is electrically connected to a cathode of the second diode D2.

8. The energy storage system according to claim 5, characterized in that: The control circuit further includes a current sampling module, which collects the current between the second end of the fourth transistor Q6 and the negative electrode of the energy storage module, and the current sampling module is electrically connected to the detection end of the micro control unit MCU.

9. A control method for an energy storage system according to any one of claims 5 to 8, characterized in that: The control method comprises: T1: the inverter supplies power to the wake-up circuit, turns on the optocoupler U1, turns on the second transistor Q4, and guides the second transistor Q3 to turn on, the energy storage module supplies power to the battery management unit BMS, and the microcontroller unit MCU is powered and outputs an enable signal to the base of the second transistor Q4, and the second transistor Q4 remains in the on state; T2: the optical coupler U1 is disconnected, the microcontroller unit MCU outputs a driving signal to drive the third transistor Q5 and the fourth transistor Q6 to be turned on at the same time, and the inverter charges the energy storage module; T3: the inverter is powered off, the inverter stops charging the energy storage module, the micro control unit MCU stops outputting the enable signal, the second transistor Q4 is turned off, and the second transistor Q3 is turned off, the battery management unit BMS is powered off, the micro control unit MCU is powered off, and the third transistor Q5 and the fourth transistor Q6 are turned off.

10. The control method according to claim 9, characterized in that: In step T1, after the micro control unit MCU is powered, the feedback terminal of the micro control unit MCU obtains a voltage signal, and when the voltage signal changes, the micro control unit MCU outputs an enable signal to the base of the second transistor Q4; In step T2, the microcontroller unit MCU obtains the current value of the charging circuit of the energy storage module in real time; In step T3, when no current flows through the charging circuit, the micro control unit MCU stops outputting the enable signal.

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