Auxiliary source activation indicating circuit and energy storage system

Abstract

The invention relates to the technical field of energy storage power supplies, and mainly provides an auxiliary source activation indication circuit and an energy storage system. The circuit comprises a switch module, and an activation module and an indication module which are connected with the switch module; the activation module is connected with a photovoltaic input source, the switch module is connected with a power supply, and the switch module and the indication module are further connected with an auxiliary source. The activation module is used for controlling the switch module to be switched on when the input voltage of the photovoltaic input source is larger than a first preset value. When the switch module is switched on, the power supply voltage of the power supply is input to the auxiliary source, and if the power supply voltage is larger than the activation voltage, the indication module responds to a voltage signal output by the auxiliary source to output a first indication signal to indicate that the auxiliary source is activated; and if the voltage is less than the activation voltage, the indication module responds to the power supply voltage and outputs a second indication signal to indicate that the auxiliary source is not activated. On the basis, a user can be prompted whether the auxiliary source is activated or not through different indication signals, so that the situation that the auxiliary source is started and stopped frequently is avoided, and the stability of the energy storage system is improved.

Description

Technical Field

[0001] This invention relates to the technical field of energy storage power supplies, and in particular to an auxiliary power source activation indicator circuit and an energy storage system. Background Technology

[0002] During the operation of a photovoltaic (PV) system, when PV modules are in a low-voltage output state due to weak sunlight, a sudden load connection will instantly lower the PV input voltage. Existing auxiliary power source activation mechanisms have a fixed threshold for the input voltage; the lowered voltage often fails to meet the minimum standard required for auxiliary power source activation, thus preventing proper activation. Even if subsequent increases in sunlight restore the PV power to above the activation voltage, the system cannot trigger the pulse signal again to activate the auxiliary power source. This results in the ineffective utilization of the restored PV power, leading to significant energy waste. Furthermore, PV power output fluctuates due to weather changes and other factors, causing frequent voltage fluctuations. When the PV voltage is near the auxiliary power source activation threshold, these small fluctuations significantly shorten the on-time of the pulse activation circuit. This brief on-time is insufficient to provide continuous and stable energy support for auxiliary power source establishment, ultimately preventing proper activation.

[0003] Therefore, in order to solve the above problems, it is necessary to provide an auxiliary source activation indicator circuit. Summary of the Invention The present invention provides an auxiliary source activation indicator circuit and an energy storage system, aiming to solve the technical problem in the prior art that it is impossible to determine whether the auxiliary source has been successfully activated, resulting in resource waste and short service life of the energy storage system.

[0004] To solve the above-mentioned technical problems, one technical solution adopted in the embodiments of the present invention is: to provide an auxiliary source activation indicator circuit, the auxiliary source activation indicator circuit including an activation module, a switch module and an indicator module; The activation module is connected to the switch module and the photovoltaic input source respectively. The switch module is also connected to the power supply and the indicator module respectively. The switch module and the indicator module are also used to connect to the auxiliary power source. The activation module is used to detect the input voltage of the photovoltaic input source and output an activation signal when the input voltage is greater than a first preset value; The switching module is used to receive the activation signal and, based on the activation signal, conduct the power supply voltage of the power supply to the auxiliary source and the indicator module, wherein the auxiliary source is activated in response to the power supply voltage; The indicator module is configured to output a first indicator signal in response to the voltage signal output by the auxiliary source when the auxiliary source is successfully activated; and When the auxiliary power source fails to activate, a second indication signal is output in response to the power supply voltage.

[0005] Optionally, the indicator module is further configured to output the second indicator signal after a target time delay when the power supply voltage is received, wherein the target time is greater than the time taken from the auxiliary source being powered on and activated to output the voltage signal.

[0006] Optionally, the indication module includes a delay control unit, a locking unit, and an indication unit; The delay control unit is connected to the indicator unit, the locking unit and the switch module respectively. The indicator unit is connected to the switch module and the auxiliary power source. The locking unit is connected to the auxiliary power source. The locking unit is used to output a locking signal to the delay control unit when it receives the voltage signal; The delay control unit is used to control the indicator unit to output the first indicator signal when the lock signal is received; If the lock signal is not received, the indicator unit outputs a second indicator signal in response to the power supply voltage and a delay of the target time.

[0007] Optionally, the indicating unit includes a resistor R14 and a light-emitting diode D16; The resistor R14 is connected to the switch module and the auxiliary power source respectively. The resistor R14 is also connected to the anode of the light-emitting diode D16, and the cathode of the light-emitting diode D16 is connected to the delay control unit.

[0008] Optionally, the delay control unit includes a switch Q9, a resistor R37, a resistor R15, a diode D17, and a capacitor C4; The control terminal of the switch Q9 is connected to the anode of the diode D17. The control terminal of the switch Q9 is also grounded through the capacitor C4. The first terminal of the switch Q9 is connected to the indicator unit. The second terminal of the switch Q9 is grounded. The cathode of the diode D17 is connected to the switch module and the auxiliary power source through the resistor R15. The cathode of the diode D17 is also connected to the locking unit.

[0009] Optionally, the auxiliary power source activation indicator circuit further includes an energy storage module, which is connected to the common terminal connecting the switch module and the indicator module. The energy storage module is used to charge in response to the supply voltage when the switch module is turned on; and When the switch module is disconnected, the indicator module is powered based on the stored electrical energy.

[0010] Optionally, the power supply is a photovoltaic input source or a battery, and the switching module includes a detection and control unit, a first switching unit, and a second switching unit; The detection and control unit is connected to the activation module, the first switch unit and the second switch unit respectively. The first switch unit is connected to the photovoltaic input source and the auxiliary source respectively. The second switch unit is connected to the battery and the auxiliary source respectively. The detection and control unit is used to detect the battery voltage of the battery, and when it receives the activation signal and the battery voltage is greater than a voltage threshold, it outputs a control signal to the second switching unit to turn on the second switching unit, thereby enabling the battery to supply power to the auxiliary power source; and When the activation signal is received and the battery voltage is less than the voltage threshold, the activation signal is transmitted to the first switching unit to turn on the first switching unit, thereby enabling the photovoltaic input source to supply power to the auxiliary source.

[0011] Optionally, the detection control unit is further configured to bypass the activation signal transmitted to the first switching unit when outputting a control signal, so as to control the first switching unit to disconnect.

[0012] Optionally, the detection control unit includes a battery detection subunit, a control subunit, and a bypass subunit; The control subunit is connected to the activation module, the battery detection subunit, the first switch unit, and the bypass subunit, respectively. The control subunit is also connected to the second switch unit, the bypass unit is also connected to the activation module, and the battery detection subunit is also used to connect to the battery. The battery detection subunit is used to detect the battery voltage of the battery and output a drive signal when the battery voltage is greater than a voltage threshold. The control subunit is configured to transmit the activation signal to the first switching unit upon receiving the activation signal, thereby turning on the first switching unit; and Upon receiving the activation signal and the drive signal, a control signal is output to turn on the second switching unit based on the control signal. The bypass subunit is used to receive the control signal and start working according to the control signal to bypass the activation signal transmitted to the first switching unit, thereby controlling the first switching unit to open.

[0013] To solve the above-mentioned technical problems, another technical solution adopted in the embodiments of the present invention is to provide an energy storage system, the energy storage system comprising: Photovoltaic input source; Power supply; Auxiliary source; and The auxiliary source activation indicator circuit described above.

[0014] Unlike related technologies, this invention provides an auxiliary power source activation indicator circuit and an energy storage system. The auxiliary power source activation indicator circuit includes an activation module, a switch module, and an indicator module. The activation module is connected to both the switch module and the photovoltaic input source. The switch module is also connected to both the power supply and the indicator module. Both the switch module and the indicator module are connected to an auxiliary power source. The activation module detects the input voltage of the photovoltaic input source and outputs an activation signal when the input voltage exceeds a first preset value to control the switch module to conduct. After the switch module is conducted, the power supply voltage from the power supply is input to the auxiliary power source. If the power supply voltage exceeds the activation voltage, the auxiliary power source is activated. At this time, the indicator module responds to the voltage signal output by the auxiliary power source and outputs a first indicator signal. Based on this, the power supply voltage is dually judged using the first preset value and the activation voltage, thereby avoiding the occurrence of erroneous activation of the auxiliary power source and improving the service life of the energy storage system. When the power supply voltage is less than the activation voltage, the indicator module responds to the power supply voltage and outputs a second indicator signal, indicating that the auxiliary power source is not activated. Based on this, different indicator signals can be used to prompt users whether the auxiliary power source has been activated, thereby avoiding frequent start-ups and shutdowns of the auxiliary power source and increasing the stability of the energy storage system. Attached Figure Description

[0015] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0016] Figure 1 This is a structural block diagram of an energy storage system provided in an embodiment of the present invention; Figure 2 This is a structural block diagram of an auxiliary source activation indicator circuit provided in an embodiment of the present invention; Figure 3 This is a circuit diagram of an auxiliary source activation indicator circuit provided in an embodiment of the present invention; Figure 4 This is a circuit diagram of another auxiliary source activation indicator circuit provided in an embodiment of the present invention; Figure 5 This is a structural block diagram of another auxiliary source activation indicator circuit provided in an embodiment of the present invention; Figure 6 This is a circuit diagram of another auxiliary source activation indicator circuit provided in an embodiment of the present invention. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0018] It should be noted that, unless otherwise specified, the various features in the embodiments of the present invention can be combined with each other, and all are within the protection scope of the present invention. Furthermore, although functional modules are divided in the device schematic diagram and a logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different module division or in a different order than that shown in the device schematic diagram or the flowchart.

[0019] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0020] Please see Figure 1 , Figure 1 This is a structural block diagram of an energy storage system provided in an embodiment of the present invention, such as... Figure 1 As shown, the energy storage system 1 includes a photovoltaic input source 100, a power supply 200, an auxiliary source 300, and an auxiliary source activation indicator circuit 400. The auxiliary source activation indicator circuit 400 is connected to the photovoltaic input source 100, the power supply 200, and the auxiliary source 300. The auxiliary source activation indicator circuit 400 receives the input voltage from the photovoltaic input source 100 and starts working when the input voltage of the photovoltaic input source 100 exceeds a first preset value. At this time, the auxiliary source activation indicator circuit 400 receives the power supply voltage output by the power supply 200 and transmits the power supply voltage to the auxiliary source 300. When the auxiliary source 300 receives the power supply voltage, the auxiliary source activation indicator circuit 400 determines whether the auxiliary source 300 is activated. When the auxiliary source 300 is activated, it outputs a first indicator signal, and when the auxiliary source 300 is not activated, it outputs a second indicator signal to indicate whether the auxiliary source 300 has been properly activated. Based on this, resource waste can be avoided, thereby improving the reliability of the energy storage system 1.

[0021] In some embodiments, such as Figure 1As shown, the energy storage system 1 also includes a battery 500. When the energy storage system 1 starts operating, the power supply 200 can be either a photovoltaic input source 100 or the battery 500. When the power supply 200 is a photovoltaic input source 100, the supply voltage is the input voltage of the photovoltaic input source 100; and when the power supply 200 is the battery 500, the supply voltage is the battery voltage of the battery 500.

[0022] In some embodiments, please refer to Figure 2 , Figure 2 This is a structural block diagram of an auxiliary source activation indicator circuit provided in an embodiment of the present invention, such as... Figure 2 As shown, the auxiliary source activation indicator circuit 400 includes an activation module 41, a switch module 42, and an indicator module 43; The activation module 41 is connected to the switch module 42 and the photovoltaic input source 100 respectively. The switch module 42 is also connected to the power supply 200 and the indicator module 43 respectively. The switch module 42 and the indicator module 43 are also used to connect to the auxiliary source 300. The activation module 41 is used to detect the input voltage of the photovoltaic input source 100, and output an activation signal when the input voltage is greater than a first preset value; The switch module 42 is used to receive the activation signal and, based on the activation signal, conduct the power supply voltage of the power supply 200 to the auxiliary power source 300 and the indicator module 43, wherein the auxiliary power source 300 is activated in response to the power supply voltage. The indicator module 43 is used to output a first indicator signal in response to the voltage signal output by the auxiliary source 300 when the auxiliary source 300 is successfully activated; and When the auxiliary power source 300 fails to activate, a second indication signal is output in response to the power supply voltage.

[0023] Specifically, when the photovoltaic input source 100 is connected to the auxiliary source activation indicator circuit 400, the photovoltaic input source 100 will input a corresponding input voltage according to the illumination conditions. At this time, the activation module 41 will receive the input voltage and determine whether the input voltage is greater than a first preset value. When the input voltage is greater than the first preset value, the activation module 41 will output an activation signal to the switch module 42. After receiving the activation signal, the switch module 42 will be turned on based on the activation signal. When the switch module 42 is turned on, the supply voltage of the power supply 200 will be input to the auxiliary source 300 through the switch module 42. At this time, if the auxiliary source 300 is activated by the supply voltage, the auxiliary source 300 will start working, thereby outputting a voltage signal to the indicator module 43, so that the indicator module 43 outputs a first indicator signal. If the power supply voltage output by the switch module 42 is insufficient to activate the auxiliary source 300, the power supply voltage will be input to the indicator module 43. Upon receiving the power supply voltage, the indicator module 43 will output a second indicator signal based on the power supply voltage. Therefore, in practical use, the user can determine whether the auxiliary source 300 is activated by observing the indicator signal output by the indicator module 43, thus enabling timely response when the auxiliary source 300 is not activated, thereby avoiding resource waste.

[0024] In some embodiments, the first indication signal and the second indication signal can be indicator lights of different colors, such as the first indication signal being a green light and the second indication signal being a red light; or they can be the same color but different states, such as the first indication signal being a constantly lit indicator light and the second indication signal being an off or flashing indicator light. It should be noted that the first indication signal and the second indication signal are mainly used to distinguish between the two states of the auxiliary source 300 being activated and the auxiliary source 300 being inactive, and are not limited here.

[0025] It should be noted that in some embodiments, when the power supply 200 is a photovoltaic input source, if the switching module 42 is turned on, the photovoltaic input source 100 will supply power to the auxiliary source 300 through the switching module 42, and the photovoltaic input source 100 will be under load. However, it should be understood that the input voltage of the photovoltaic input source is pulled down when under load. Therefore, if the input voltage of the photovoltaic input source 100 is just greater than a first preset value, the voltage input to the auxiliary source 300 will be insufficient to activate the auxiliary source 300. When the auxiliary source 300 fails to activate, even if the subsequent input voltage of the photovoltaic input source meets the activation conditions of the auxiliary source 300, the auxiliary source 300 cannot be activated, resulting in the photovoltaic input source's input voltage not being effectively utilized, leading to a significant waste of resources. When the power supply 200 is a battery 500, after the switch module 42 is turned on, the battery 500 will supply power to the auxiliary power source 300 through the switch module 42. If the battery is undervoltage, the voltage output by the battery 500 will be insufficient to activate the auxiliary power source 300, and the battery will remain in a discharging state, leading to over-discharge and affecting its lifespan. Therefore, by introducing an indicator module 43, the activation status of the auxiliary power source 300 can be indicated, thereby improving the reliability of the energy storage system.

[0026] In another embodiment, the indicator module 43 is further configured to output the second indicator signal after a target time delay when the power supply voltage is received, wherein the target time is greater than the time taken for the auxiliary source 300 to be powered on and activated to output the voltage signal.

[0027] Specifically, when the switching module 42 outputs the supply voltage of the power supply 200, both the indicator module 43 and the auxiliary power source 300 will receive the supply voltage. At this time, the indicator module 43 will respond to the supply voltage for a target time. If the supply voltage successfully activates the auxiliary power source 300 within the target time, the auxiliary power source 300 will output a voltage signal to the indicator module 43, so that the indicator module 43 outputs a first indicator signal based on the voltage signal. If the auxiliary power source 300 is not activated, the indicator module 43 will output a second indicator signal based on the received supply voltage after the target time.

[0028] In yet another embodiment, such as Figure 2 As shown, the indicator module 43 includes a delay control unit 431, a locking unit 432, and an indicator unit 433; The delay control unit 431 is connected to the indicator unit 433, the locking unit 432 and the switch module 42 respectively. The indicator unit 433 and the locking unit 432 are also connected to the auxiliary power source 300. The locking unit 432 is used to output a locking signal to the delay control unit 431 when it receives the voltage signal; The delay control unit 431 is used to control the indicator unit 433 to output the first indicator signal when the lock signal is received; When the lock signal is not received, in response to the power supply voltage, the indicator unit 433 is controlled to output a second indicator signal by delaying the target time.

[0029] Specifically, when the switch module 42 outputs the supply voltage, the delay control unit 431 receives and stores the supply voltage. If the auxiliary source 300 is activated by the supply voltage, the auxiliary source 300 will output a voltage signal to the locking unit 432. After receiving the voltage signal, the locking unit 432 will output a locking signal to the delay control unit 431 based on the voltage signal, so that the delay control unit 431 controls the indicator unit 433 to output a first indicator signal. If the auxiliary source 300 is not activated, the auxiliary source 300 will not output the voltage signal, and the locking unit 432 will not output the locking signal. If the delay control unit 431 still does not receive the locking signal after the target time, the delay control unit 431 will input the supply voltage to the indicator unit 433, so that the indicator unit 433 will output a second indicator signal, thereby indicating that the auxiliary source 300 has not been activated.

[0030] In some embodiments, please refer to Figure 3 , Figure 3 This is a circuit diagram of an auxiliary source activation indicator circuit provided in an embodiment of the present invention, such as... Figure 3 As shown, the delay control unit 431 includes a switch Q9, a resistor R37, a resistor R15, a diode D17, and a capacitor C4; the locking unit 432 includes a switch Q20 and a resistor R17; and the indicating unit 433 includes a resistor R14 and a light-emitting diode D16. The control terminal of the switching transistor Q9 is connected to the anode of the diode D17. The control terminal of the switching transistor Q9 is also grounded through the capacitor C4. The first terminal of the switching transistor Q9 is connected to the indicator unit 433. The second terminal of the switching transistor Q9 is used for grounding. The cathode of the diode D17 is connected to the switching module 42 and the auxiliary power source 300 through the resistor R15. The cathode of the diode D17 is also connected to the locking unit 432.

[0031] The control terminal of the switch Q20 is connected to the auxiliary power source 300 through the resistor R17. The first terminal of the switch Q20 is connected to the delay control unit 431, and the second terminal of the switch Q20 is used for grounding.

[0032] The resistor R14 is connected to the switch module 42 and the auxiliary power source 300 respectively. The resistor R14 is also connected to the anode of the light-emitting diode D16, and the cathode of the light-emitting diode D16 is connected to the delay control unit 431.

[0033] When the switching module 42 outputs the supply voltage, the supply voltage is input to the auxiliary power source 300, and simultaneously charges the capacitor C4 through the resistor R15. During the charging process of capacitor C4, if the auxiliary power source 300 is activated, it will output a voltage signal to the control terminal of the switching transistor Q20 through the resistor R17, thereby turning on the switching transistor Q20. When the switching transistor Q20 is turned on, the voltage at the control terminal of the switching transistor Q9 is pulled low by the switching transistor Q20, thereby turning off the switching transistor Q9, and at this time, the light-emitting diode D16 is off. If the auxiliary power source 300 is not activated, it will not output the voltage signal, and the switching transistor Q20 is off. After the target time (when the capacitor C4 is fully charged), the control terminal of the switching transistor Q9 begins to receive the supply voltage and turns on based on the supply voltage. When the switching transistor Q9 is turned on, a voltage drop is generated across the LED D16, and the LED D16 lights up, thereby indicating that the auxiliary power source 300 is not activated.

[0034] In another embodiment, it should be noted that because the input voltage of the photovoltaic input source 100 is affected by sunlight, when the activation module 41 outputs an activation signal based on the input voltage, the duration of the activation signal is short, resulting in a short conduction time for the switch module 42, and the auxiliary source 300 cannot be activated. When the auxiliary source 300 is not activated, since the switch module 42 is also in an off state, the indicator module 43 has no power supply and therefore cannot correctly indicate the operating status of the auxiliary source 300.

[0035] Based on this, such as Figure 2 As shown, the auxiliary power source activation indicator circuit 400 further includes an energy storage module 44, which is connected to the common terminal connecting the switch module 42 and the indicator module 43. The energy storage module 44 is used to charge in response to the supply voltage when the switch module 42 is turned on; and When the switch module 42 is disconnected, the indicator module 43 is powered based on the stored electrical energy.

[0036] Specifically, when the switch module 42 is turned on, the energy storage module 44 receives and stores the supply voltage. If the auxiliary power source 300 is activated, the indicator module 43 responds to the voltage signal output by the auxiliary power source 300 and outputs a first indicator signal based on the voltage signal. If the auxiliary power source 300 is not activated and the switch module 42 is turned off, the energy storage module 44 outputs the stored voltage to the indicator module 43 so that the indicator module 43 outputs a second indicator signal based on the voltage.

[0037] In yet another embodiment, such as Figure 3 As shown, the energy storage module 44 is a capacitor C5; The first end of the capacitor C5 is connected to the switch module 42 and the resistor R14 respectively, and the second end of the capacitor C5 is used for grounding.

[0038] The capacitor C5 is used to store energy when the switch module 42 is turned on, and to discharge when the auxiliary power source 300 is not activated and the switch module 42 is turned off, thereby enabling the indicator module 43 to output a second indicator signal.

[0039] In another embodiment, when the power supply 200 is the battery, if the battery is in an undervoltage state, it will lead to over-discharge. Therefore, to avoid over-discharge, such as... Figure 2 As shown, the switch module 42 includes a detection control unit 421, a first switch unit 422, and a second switch unit 423; The detection and control unit 421 is connected to the activation module 41, the first switch unit 422, and the second switch unit 423 respectively. The first switch unit 422 is connected to the photovoltaic input source 100 and the auxiliary source 300 respectively. The second switch unit 423 is connected to the battery 500 and the auxiliary source 300 respectively. The detection control unit 421 is used to detect the battery voltage of the battery, and when it receives the activation signal and the battery voltage is greater than a voltage threshold, it outputs a control signal to the second switching unit 423 to turn on the second switching unit 423, thereby enabling the battery to supply power to the auxiliary power source 300; and When the activation signal is received and the battery voltage is less than the voltage threshold, the activation signal is transmitted to the first switching unit 422 so that the first switching unit 422 is turned on, thereby enabling the photovoltaic input source 100 to supply power to the auxiliary source 300. Specifically, when the detection control unit 421 receives the activation signal, it detects the battery voltage of the battery 500. If the battery voltage is greater than a voltage threshold, it outputs a control signal to the second switching unit 423, causing the second switching unit 423 to conduct based on the control signal. This allows the battery 500 to output its battery voltage to the auxiliary power source 300 through the second switching unit 423, thereby activating the auxiliary power source 300 and supplying it with power. Conversely, if the detection control unit 421 detects that the battery voltage is less than a voltage threshold when it receives the activation signal, it transmits the activation signal to the first switching unit 422, causing the first switching unit 422 to conduct based on the activation signal. This allows the input voltage of the photovoltaic input source 100 to be input to the auxiliary power source 300 through the first switching unit 422, thereby enabling the auxiliary power source 300 to start operating based on the input voltage. Based on this, when the battery 500 is charged, it can prioritize supplying power to the auxiliary power source 300, and when the battery 500 is decharged, it can supply power to the auxiliary power source 300 through the photovoltaic input source 100, thereby effectively avoiding over-discharge of the battery 500.

[0040] In another embodiment, the detection control unit 421 is further configured to bypass the activation signal transmitted to the first switching unit 422 when outputting a control signal, so as to control the first switching unit 422 to be turned off. It should be noted that the voltage of the battery 500 is more stable than the voltage of the photovoltaic input source 100; therefore, when the battery has power, it is necessary to control the battery to supply power to the auxiliary source 300. In this embodiment, when the detection control unit 421 receives the activation signal and the battery voltage is greater than a voltage threshold, it will, on the one hand, output a control signal to the second switching unit 423 to control the battery 500 to supply power to the auxiliary source 300, thereby activating the auxiliary source 300; on the other hand, it will bypass the activation signal transmitted to the first switching unit 422, so that the first switching unit 422 is in an off state and the battery 500 supplies power to the auxiliary source 300. That is, the detection control unit 421 will only transmit the activation signal to the first switching unit 422 to turn on the first switching unit 422 when it receives the activation signal and the battery voltage is less than a voltage threshold.

[0041] In another embodiment, the detection control unit 421 is further configured to, upon receiving the activation signal and when the battery voltage is less than a voltage threshold, delay the transmission of the activation signal to the first switching unit 422 for a preset time. Specifically, after the activation module 41 outputs the activation signal, the detection control unit 421 receives and stores the activation signal. If the battery voltage is greater than the voltage threshold, the detection control unit 421 bypasses the stored activation signal, thereby preventing the stored activation signal from being transmitted to the first switching unit 422 and causing the first switching unit 422 to conduct. However, if the battery voltage is less than the voltage threshold, the stored activation signal is not bypassed, and the detection control unit 421 transmits the activation signal to the first switching unit 422 after a preset time delay, so that the first switching unit 422 conducts. It should be noted that when the detection control unit 421 receives the activation signal, it determines whether the battery voltage is greater than a voltage threshold. To prevent the activation signal from being transmitted to the first switching unit 422 during the determination process, the detection control unit 421 stores the activation signal input to the first switching unit 422. If the battery voltage is greater than the voltage threshold, the stored activation signal is bypassed to prevent the first switching unit 422 from being turned on. If the battery voltage is less than the voltage threshold, the activation signal input to the first switching unit 422 can be delayed for a preset time before being output, thereby preventing the photovoltaic input source 100 from supplying power to the auxiliary source 300 when the battery 500 has power.

[0042] In some embodiments, such as Figure 2 As shown, the detection control unit 421 includes a battery detection subunit 4211, a control subunit 4212, and a bypass subunit 4213; The control subunit 4212 is connected to the activation module 41, the battery detection subunit 4211, the first switch unit 422, and the bypass subunit 4213 respectively. The control subunit 4212 is also connected to the second switch unit 423. The bypass subunit 4213 is also connected to the activation module 41. The battery detection subunit 4211 is also used to connect to the battery 500. The battery detection subunit 4211 is used to detect the battery voltage of the battery 500 and output a drive signal when the battery voltage is greater than a voltage threshold. The control subunit 4212 is configured to transmit the activation signal to the first switching unit 422 upon receiving the activation signal, so as to turn on the first switching unit 422; and Upon receiving the activation signal and the drive signal, a control signal is output to turn on the second switching unit 423 based on the control signal. The bypass subunit 4213 is used to receive the control signal and start working according to the control signal to bypass the activation signal transmitted to the first switching unit 422, thereby controlling the first switching unit 422 to open; and It stops working when the control signal is not received.

[0043] Specifically, the battery detection subunit 4211 will detect the battery voltage of the battery 500 in real time, and output a drive signal when the battery voltage is greater than the voltage threshold, and stop outputting the drive signal when the battery voltage is less than the voltage threshold.

[0044] After the activation module 41 outputs the activation signal, the control subunit 4212 receives the activation signal and transmits it to the first switching unit 422. Simultaneously, the control subunit 4212 determines whether it has received the drive signal. If it does, it outputs a control signal to the second switching unit 423 and the bypass subunit 4213. When the second switching unit 423 receives the control signal, it turns on, allowing the battery voltage to be transmitted to the auxiliary power source 300. When the bypass subunit 4213 receives the control signal, it starts operating, bypassing the activation signal transmitted to the first switching unit 422, thus preventing the activation signal from being input to the first switching unit 422 and causing it to turn off. In this way, the battery 500 can supply power to the auxiliary power source 300 independently, avoiding the impact of unstable input voltage of the photovoltaic input source 100.

[0045] When the control subunit 4212 does not receive the drive signal, it does not output the control signal, thereby turning off the second switching unit 423 and stopping the bypass subunit 4213. At this time, the control subunit 4212 successfully transmits the activation signal to the first switching unit 422, causing the first switching unit 422 to turn on based on the activation signal. Once the first switching unit 422 is turned on, the input voltage of the photovoltaic input source 100 is transmitted to the auxiliary source 300 through the first switching unit 422, thereby supplying power to the auxiliary source 300.

[0046] In yet another embodiment, such as Figure 2 As shown, the detection control unit 421 further includes a delay subunit 4214; The delay subunit 4214 is connected to the activation module 41, the bypass subunit 4213 and the first switch unit 422 respectively; The delay subunit 4214 is used to receive the activation signal and, when the bypass subunit 4213 stops working, inputs the activation signal to the first switch unit 422 after a preset time delay, so that the first switch unit 422 is turned on.

[0047] Specifically, when the control subunit 4212 transmits the activation signal to the first switching unit 422, the delay subunit 4214 receives and stores the activation signal transmitted to the first switching unit 422. When the bypass subunit 4213 starts working, the activation signal is discharged through the bypass subunit 4213, thereby preventing the first switching unit 422 from being turned on; and when the control subunit 4212 stops outputting the control signal, the bypass subunit 4213 stops working. At this time, the activation signal will not be discharged through the bypass subunit 4213, and the delay subunit 4214 will input the activation signal to the first switching unit 422 after a preset delay, thereby controlling the first switching unit 422 to be turned on.

[0048] It should be noted that when the control subunit 4212 transmits the activation signal to the first switching unit 422, the first switching unit 422 will be turned on, and the photovoltaic input source 100 will supply power to the auxiliary source 300 through the first switching unit 422. However, the input voltage of the photovoltaic input source 100 is unstable, which can easily lead to safety issues with the auxiliary source 300. Therefore, by introducing the delay subunit 4214, when the control subunit 4212 transmits the activation signal to the first switching unit 422, the delay subunit 4214 will receive the activation signal, thus preventing the first switching unit 422 from turning on (photovoltaic power supply) when the battery voltage is greater than the voltage threshold. Based on this, the battery 500 can prioritize supplying power to the auxiliary source 300 when it has power. Only when the battery voltage of the battery 500 is lower than the voltage threshold (undervoltage) will the photovoltaic input source 100 supply power to the auxiliary source 300, thereby preventing the battery 500 from being over-discharged.

[0049] In some embodiments, please refer to Figure 4 , Figure 4 This is a circuit diagram of another auxiliary source activation indicator circuit provided in an embodiment of the present invention, such as... Figure 4 As shown, the battery detection subunit 4211 includes a diode D7, a Zener diode D9, and a resistor R16; The anode of diode D7 is connected to the battery 500, the cathode of diode D7 is connected to the cathode of Zener diode D9, and the anode of Zener diode D9 is connected to the control subunit 4212 through resistor R16.

[0050] Specifically, when the auxiliary power source activation indicator circuit 400 starts working, the battery voltage of the battery 500 is input to the Zener diode D9 through the diode D7. At this time, if the battery voltage is greater than the Zener diode D9's regulated voltage, the Zener diode D9 is broken down, thereby outputting a drive signal to the control subunit 4212; conversely, if the battery voltage is less than the Zener diode D9's regulated voltage, the Zener diode D9 is in the off state, and the control subunit 4212 will not receive the drive signal. It should be noted that the voltage threshold is determined based on the Zener diode D9's regulated voltage, and the selection of the Zener diode D9 is determined based on the battery 500. By selecting a Zener diode with a suitable regulated voltage, over-discharge of the battery 500 is avoided.

[0051] In yet another embodiment, such as Figure 3 As shown, the control subunit 4212 includes a switch Q10, a switch Q11, and a resistor R18; The control terminal of the switch Q10 is connected to the activation module 41. The first terminal of the switch Q10 is connected to the control terminal of the switch Q11. The second terminal of the switch Q10 is used for grounding. The first terminal of the switch Q11 is connected to the battery detection subunit 4211. The second terminal of the switch Q11 is grounded through the resistor R18. The second terminal of the switch Q11 is also connected to the second switch unit 423 and the bypass subunit 4213 respectively.

[0052] When the activation module 41 outputs an activation signal, the switch Q10 will turn on based on the activation signal, and the activation signal will also be transmitted to the first switch unit 422. If the battery detection subunit 4211 outputs a drive signal at this time, the switch Q11 will also turn on, thereby outputting a control signal to the second switch unit 423 and the bypass subunit 4213. Conversely, if the switch Q11 does not receive the drive signal when the switch Q10 is on, the switch Q11 will turn off, thereby stopping the output of the control signal.

[0053] In another embodiment, such as Figure 3 As shown, the second switching unit 423 includes a switching transistor Q19, a switching transistor Q18, a diode D14, a resistor R29, a resistor R30, and a resistor R31; The control terminal of the switching transistor Q19 is connected to the cathode of the diode D14 through the resistor R29. The anode of the diode D14 is connected to the control subunit 4212. The first terminal of the switching transistor Q19 is connected to the control terminal of the switching transistor Q18 through the resistor R31. The second terminal of the switching transistor Q19 is used for grounding. The control terminal of the switching transistor Q18 is also connected to the first terminal of the switching transistor Q18 through the resistor R30. The first terminal of the switching transistor Q18 is also connected to the battery 500. The second terminal of the switching transistor Q18 is connected to the auxiliary power source 300.

[0054] Specifically, when the control subunit 4212 outputs a control signal, the control terminal of the switch Q19 receives the control signal through the resistor R29 and the diode D14, and turns on according to the control signal. When the switch Q19 turns on, the voltage at the control terminal of the switch Q18 is pulled low, thereby turning on the switch Q18. When the switch Q18 turns on, the battery voltage of the battery 500 can supply power to the auxiliary power source 300 through the switch Q18.

[0055] In yet another embodiment, such as Figure 4 As shown, the bypass subunit 4213 includes a resistor R19 and a switching transistor Q12; the delay subunit 4214 includes a resistor R38 and a capacitor C2. The control terminal of the switch Q12 is connected to the control subunit 4212 through the resistor R19. The first terminal of the switch Q12 is connected to the activation module 41, and the second terminal of the switch Q12 is used for grounding.

[0056] The first end of the capacitor C2 is connected to the activation module 41 and the bypass subunit 4213 respectively through the resistor R38, and the second end of the capacitor C2 is used for grounding.

[0057] Specifically, when the activation module 41 outputs an activation signal, the control subunit 4212 receives the activation signal; simultaneously, the capacitor C2 also receives the activation signal transmitted to the first switching unit 422 and begins charging based on the activation signal. At this time, if the battery voltage is greater than a voltage threshold, the control subunit 4212 outputs a control signal, and the switch Q12 is turned on based on the control signal. When the switch Q12 is turned on, the activation signal transmitted to the first switching unit 422 is discharged through the switch Q12, and the capacitor C2 also discharges through the resistor R38 and the switch Q12, thereby bypassing the activation signal and ensuring that the first switching unit 422 is in the off state. If the control subunit 4212 does not output the control signal, the switch Q12 is in the off state. In this case, the capacitor C2 continuously receives the activation signal transmitted to the first switching unit 422 and outputs the activation signal to the first switching unit 422 after a preset delay, causing the first switching unit 422 to turn on.

[0058] In yet another embodiment, such as Figure 4 As shown, the first switching unit 422 includes a switching transistor Q13, a switching transistor Q14, a resistor R21, a resistor R22, a resistor R23, and a resistor R24. The control terminal of the switching transistor Q14 is connected to the detection and control unit 421 through the resistor R22. The first terminal of the switching transistor Q14 is connected to the control terminal of the switching transistor Q13 through the resistor R21. The second terminal of the switching transistor Q14 is grounded through the resistor R24. The control terminal of the switching transistor Q13 is also connected to the second terminal of the switching transistor Q13 through the resistor R23. The first terminal of the switching transistor Q13 is connected to the activation module 41. The second terminal of the switching transistor Q13 is also used to connect to the auxiliary power source 300.

[0059] Specifically, when the detection control unit 421 transmits the activation signal to the first switching unit 422, the control terminal of the switching transistor Q14 receives the activation signal and turns on based on the activation signal. After the switching transistor Q14 turns on, the switching transistor Q13 also turns on. When the switching transistor Q13 turns on, the input voltage of the photovoltaic input source 100 can be input to the auxiliary source 300 through the activation module 41 and the switching transistor Q13 to power the auxiliary source 300. Based on this, when the battery 500 is undervoltage, the photovoltaic input source 100 can supply power to the auxiliary source 300, thereby preventing the battery 500 from over-discharging while maintaining the working state of the auxiliary source 300.

[0060] In some embodiments, the first switching unit 422 further includes a diode D11 and a resistor R35; the cathode of the diode D11 is connected to the switching transistor Q14, and the anode of the diode D11 is connected to the auxiliary power source 300 through the resistor R35.

[0061] It is known that the activation signal is a single-pulse signal. When the activation signal stops, the switch Q14 turns off, and the switch Q13 also turns off. At this time, the photovoltaic input source 100 will stop supplying power to the auxiliary source 300. Therefore, in order to keep the auxiliary source 300 working, after the auxiliary source 300 starts working based on the input voltage of the photovoltaic input source 100, the auxiliary source 300 will also output an auxiliary source voltage to the control terminal of the switch Q14 through the diode D11, so that the switch Q14 remains in the conducting state. Based on this, the first switching unit 422 can still be controlled to remain in the conducting state after the activation signal ends, so that the photovoltaic input source 100 continues to supply power to the auxiliary source 300.

[0062] In yet another embodiment, such as Figure 4 As shown, the first switching unit 422 further includes a diode D10. The cathode of the diode D10 is connected to the control terminal of the switching transistor Q14, and the anode of the diode D10 is connected to the delay subunit 4214. The unidirectional conductivity of the diode prevents the auxiliary source voltage output from the auxiliary source 300 from flowing back to the delay subunit 4214.

[0063] In yet another embodiment, such as Figure 3 As shown, the energy storage system 1 also includes a controller (not shown), and the second switching unit 423 also includes a diode D13. The anode of the diode D13 is connected to the controller, and the cathode of the diode D13 is connected to the switching transistor Q19 through the resistor R29.

[0064] Specifically, when the battery 500 outputs the battery voltage to activate the auxiliary power source 300, the auxiliary power source 300 will start working based on the battery voltage. At this time, the controller will continuously output a conduction control signal to the control terminal of the switching transistor Q19 through the diode D13, so that the switching transistor Q19 remains in the conducting state, thereby enabling the battery 500 to continuously supply power to the auxiliary power source 300.

[0065] In another embodiment, such as Figure 4 As shown, the first switching unit 422 further includes a switching transistor Q15 and a resistor R25. The control terminal of the switching transistor Q15 is connected to the controller through the resistor R25. The first terminal of the switching transistor Q15 is connected to the control terminal of the switching transistor Q14, and the second terminal of the switching transistor Q15 is used for grounding.

[0066] It is understood that after the auxiliary power source 300 starts working based on the battery voltage, the controller will also input the turn-on control signal to the switching transistor Q15 through the resistor R25 to turn on the switching transistor Q15. When the switching transistor Q15 is turned on, the control terminal voltage of the switching transistor Q14 is pulled low, thereby keeping the switching transistor Q14 in the off state, and the switching transistor Q13 also remains in the off state. Based on this, the false turn-on of the switching transistor Q14 can be avoided, thereby improving the reliability of the auxiliary power source activation indicator circuit 400.

[0067] In some embodiments, when the battery voltage of the battery 500 is lower than the voltage threshold (battery undervoltage), after the auxiliary power source 300 is activated by the photovoltaic input source 100, the photovoltaic input source 100 will not only supply power to the auxiliary power source 300, but also input the input voltage to the battery 500 to charge the battery 500. When the battery 500 is charged to a voltage greater than the voltage threshold, the controller will output a conduction control signal to the switching transistor Q19 through the diode D13 to turn on the switching transistor Q19, thereby switching the battery 500 to supply power to the auxiliary power source 300, thereby improving the stability of the auxiliary power source activation indicator circuit 400.

[0068] In some embodiments, please refer to Figure 5 , Figure 5 This is a structural block diagram of another auxiliary source activation indicator circuit provided in an embodiment of the present invention, such as... Figure 5 As shown, the activation module 41 includes a photovoltaic detection unit 411, a first control unit 412, and an activation signal generation unit 413; The photovoltaic detection unit 411 is connected to the first control unit 412. The first control unit 412 is connected to the activation signal generation unit 413 and the switch module 42 respectively. The activation signal generation unit 413 is also connected to the switch module 42. The photovoltaic detection unit 411 and the first control unit 412 are also used to connect to the photovoltaic input source 100. The photovoltaic detection unit 411 is used to detect the input voltage of the photovoltaic input source 100, and when the input voltage is greater than a first preset value, it controls the first control unit 412 to start working, so that the first control unit 412 transmits the input voltage of the photovoltaic input source 100. The activation signal generation unit 413 is used to receive and store the input voltage after the first control unit 412 starts working, and output an activation signal based on the stored voltage; and The activation signal is stopped when the stored voltage is greater than a preset voltage, wherein the preset voltage is less than the first preset value.

[0069] Specifically, when the photovoltaic input source 100 outputs the input voltage, the photovoltaic detection unit 411 receives and detects the input voltage of the photovoltaic input source 100, and controls the first control unit 412 to start working when the input voltage is greater than a first preset value. After the first control unit 412 starts working, the input voltage of the photovoltaic input source 100 is input to the activation signal generation unit 413 through the first control unit 412. When the activation signal generation unit 413 receives the input voltage, it stores the input voltage and outputs an activation signal based on the stored voltage; when the voltage stored by the activation signal generation unit 413 is greater than the preset voltage, the activation signal generation unit 413 stops outputting the activation signal.

[0070] In some embodiments, please refer to Figure 6 , Figure 6 This is a circuit diagram of another auxiliary source activation indicator circuit provided in an embodiment of the present invention, such as... Figure 6 As shown, the photovoltaic detection unit 411 includes a Zener diode D2, a switching transistor Q2, a resistor R2, and a resistor R4; the first control unit 412 includes a resistor R7, a resistor R8, a resistor R9, a switching transistor Q4, a switching transistor Q5, and a Zener diode D4; the activation signal generation unit 413 includes a switching transistor Q6, a resistor R10, a resistor R11, a diode D5, and a capacitor C1. The switching transistor Q2 is connected to the anode of the Zener diode D2 through the resistor R2, the cathode of the Zener diode D2 is connected to the photovoltaic input source 100, the first end of the switching transistor Q2 is connected to the first control unit 412 through the resistor R4, and the second end of the switching transistor Q2 is used for grounding.

[0071] The control terminal of the switching transistor Q4 is connected to the photovoltaic detection unit 411. The first terminal of the switching transistor Q4 is connected to the control terminal of the switching transistor Q5 through the resistor R8. The second terminal of the switching transistor Q4 is also grounded through the resistor R7. The first terminal of the switching transistor Q5 is connected to the photovoltaic input source 100. The first terminal of the switching transistor Q5 is also connected to the cathode of the Zener diode D4. The anode of the Zener diode D4 is connected to the control terminal of the switching transistor Q5. The resistor R9 is connected in parallel with the Zener diode D4. The second terminal of the switching transistor Q5 is connected to the activation signal generation unit 413 and the switching module 42, respectively.

[0072] The first end of the switching transistor Q6 is connected to the first control unit 412. The first end of the switching transistor Q6 is also connected to the control terminal of the switching transistor Q6 through the resistor R10. The control terminal of the switching transistor Q6 is also connected to the anode of the diode D5 through the resistor R11. The cathode of the diode D5 is grounded through the capacitor C1. The second end of the switching transistor Q6 is also connected to the switching module 42.

[0073] Specifically, when the photovoltaic input source 100 is connected to the auxiliary source activation indicator circuit 400, the Zener diode D2 receives the input voltage from the photovoltaic input source 100. If the input voltage is greater than the Zener diode D2's regulated voltage, the Zener diode D2 will break down, and the switch Q2 will turn on. When the switch Q2 turns on, the control terminal voltage of the switch Q4 is pulled low, thus turning on the switch Q4. When the switch Q4 turns on, the switch Q5 also turns on. At this time, the input voltage of the photovoltaic input source 100 will charge the capacitor C1 through the switch Q5, resistor R10, resistor R11, and diode D5, and the switch Q6 will also turn on. As the terminal voltage of the capacitor C1 gradually increases, the voltage drop across resistor R10 becomes less than the turn-on voltage drop of the switch Q6, and the switch Q6 turns off. Based on this, the switching transistor Q6 can generate a pulse signal that lasts for a period of time by turning it on and off, and then input the pulse signal to the switching module 42.

[0074] The selection of the Zener diode D2 is based on the photovoltaic input source 100. By setting an appropriate voltage regulation value, the auxiliary source activation indicator circuit 400 will start working according to the input voltage of the photovoltaic input source 100 when the input voltage of the photovoltaic input source 100 meets the requirements.

[0075] In another embodiment, the first control unit 412 further includes a resistor R6, which is connected to the control terminals of the photovoltaic input source 100 and the switching transistor Q4, respectively. The resistor R6 ensures that the voltage at the control terminal of the switching transistor Q4 is equal to the input voltage of the photovoltaic input source 100, thereby preventing the switching transistor Q4 from being falsely turned on.

[0076] In some embodiments, such as Figure 5 As shown, the activation module 41 further includes an overvoltage detection unit 414; The overvoltage detection unit 414 is connected to the photovoltaic input source 100 and the first control unit 412, respectively.

[0077] The overvoltage detection unit 414 is used to detect the input voltage of the photovoltaic input source 100, and controls the first control unit 412 to shut down when the input voltage is greater than a third preset value, so as to stop outputting the input voltage of the photovoltaic input source 100. The third preset value is greater than the first preset value.

[0078] It is known that when the input voltage of the photovoltaic input source 100 is greater than the third preset value, it is confirmed that the input voltage of the photovoltaic input source 100 is too high. At this time, the first control unit 412 is turned off to stop the output of the input voltage, thereby avoiding damage to subsequent devices.

[0079] In some embodiments, such as Figure 6 As shown, the overvoltage detection unit 414 includes a switching transistor Q3, a resistor R5, and a Zener diode D3; The control terminal of the switching transistor Q3 is connected to the cathode of the Zener diode D3 through the resistor R5. The anode of the Zener diode D3 is grounded. The first terminal of the switching transistor Q3 is connected to the photovoltaic input source 100, and the second terminal of the switching transistor Q3 is connected to the first control unit 412.

[0080] Specifically, when the input voltage of the photovoltaic input source 100 is greater than the third preset value, the Zener diode D3 is broken down, and the switch Q3 is also in the conducting state. At this time, due to the effect of the resistor R4, even if the switch Q2 is also in the conducting state, the control terminal voltage of the switch Q4 is still pulled high, thereby causing the switch Q4 to turn off, and the switch Q5 also turns off, thus stopping the output of the input voltage of the photovoltaic input source 100.

[0081] In yet another embodiment, such as Figure 5 As shown, the auxiliary source activation indicator circuit 400 also includes a reset control module 45; The reset control module 45 is connected to the activation signal generation unit 413 and the first control unit 412 respectively, and the reset control module 45 is also connected to the photovoltaic input source 100; The reset control module 45 is used to start working according to the input voltage of the photovoltaic input source 100 when the input voltage of the photovoltaic input source 100 is less than a first preset value and greater than a second preset value, so as to release the voltage stored in the activation signal generation unit 413; and When the first control unit 412 starts working, the voltage stored in the activation signal generation unit 413 is stopped from being discharged, wherein the first preset value is greater than the second preset value.

[0082] Specifically, when the input voltage of the photovoltaic input source 100 is less than a first preset value but greater than a second preset value, the photovoltaic detection unit 411 controls the first control unit 412 to stop working. At this time, the input voltage of the photovoltaic input source 100 is input to the reset control module 45, causing the reset control module 45 to start working. After the reset control module 45 starts working, the activation signal generation unit 413 discharges the stored voltage through the reset control module 45. When the input voltage of the photovoltaic input source 100 is greater than the first preset value, the photovoltaic detection unit 411 controls the first control unit 412 to start working, and the reset control module 45 stops working. Since the voltage stored in the activation signal generation unit 413 has been discharged, the activation signal generation unit 413 will receive and store the input voltage again to output an activation signal. Based on this, the activation signal can be accurately output when the photovoltaic input source 100 is connected again, thereby improving the reliability of the auxiliary source activation indicator circuit 400.

[0083] In yet another embodiment, such as Figure 5 As shown, the reset control module 45 includes an undervoltage reset unit 451 and a second control unit 452; The undervoltage reset unit 451 is connected to the activation signal generation unit 413 and the second control unit 452 respectively. The second control unit 452 is also connected to the first control unit 412. The second control unit 452 and the undervoltage reset unit 451 are also used to connect to the photovoltaic input source 100. The undervoltage reset unit 451 is used to start working when the input voltage is less than a first preset value and greater than a second preset value, so as to release the voltage stored in the activation signal generation unit 413. The second control unit 452 is used to control the undervoltage reset unit 451 to stop working after the first control unit 412 is turned on, thereby stopping the discharge of the voltage stored in the activation signal generation unit 413.

[0084] When the input voltage of the photovoltaic input source 100 is less than a first preset value but greater than a second preset value, the photovoltaic detection unit 411 controls the first control unit 412 to stop working. At this time, the input voltage of the photovoltaic input source 100 is input to the undervoltage reset unit 451, thereby causing the undervoltage reset unit 451 to start working. After the undervoltage reset unit 451 starts working, the activation signal generation unit 413 discharges the stored voltage through the undervoltage reset unit 451. When the input voltage of the photovoltaic input source 100 is greater than the first preset value, the photovoltaic detection unit 411 controls the first control unit 412 to start working, thereby inputting the input voltage to the activation signal generation unit 413. After the first control unit 412 starts working, the second control unit 452 also starts working, thereby causing the undervoltage reset unit 451 to stop working. Based on this, the activation signal generation unit 413 can accurately output the activation signal.

[0085] In another embodiment, such as Figure 6 As shown, the undervoltage reset unit 451 includes a switch Q8 and resistors R12 and R13; the second control unit 452 includes a switch Q1, resistors R3 and R1. The control terminal of the switch Q8 is connected to the second control unit 452 and the photovoltaic input source 100 respectively through the resistor R13. The first terminal of the switch Q8 is connected to the capacitor C1 through the resistor R12, and the second terminal of the switch Q8 is used for grounding.

[0086] The control terminal of the switch Q1 is connected to the second terminal of the switch Q4 through the resistor R3. The first terminal of the switch Q1 is connected to the undervoltage reset unit 451. The first terminal of the switch Q1 is also connected to the photovoltaic input source 100 through the resistor R1. The second terminal of the switch Q1 is also used for grounding.

[0087] When the input voltage of the photovoltaic input source 100 is less than a first preset value and greater than a second preset value, the input voltage is input to the control terminal of the switching transistor Q8 through resistors R1 and R13, thereby turning on the switching transistor Q8. When the switching transistor Q8 is turned on, the capacitor C1 begins to discharge through resistor R12 and the switching transistor Q8. When the first control unit 412 starts working (i.e., the switching transistor Q4 is turned on), the input voltage of the photovoltaic input source 100 is input to the control terminal of the switching transistor Q1, thereby controlling the switching transistor Q1 to turn on. When the switching transistor Q1 is turned on, the voltage at the control terminal of the switching transistor Q8 is pulled low by the switching transistor Q1, and the switching transistor Q8 is turned off. When the switching transistor Q8 is turned off, the capacitor C1 also stops discharging.

[0088] In some embodiments, such as Figure 6 As shown, the auxiliary source activation indicator circuit 400 further includes a diode D6; the anode of the diode D6 is connected to the activation signal generation unit 413, and the cathode of the diode D6 is connected to the switching module 42. Due to the unidirectional conductivity of the diode D6, the energy stored in the capacitor C2 is prevented from flowing back to the activation signal generation unit 413 when the activation signal generation unit 413 stops outputting the activation signal.

[0089] In another embodiment, such as Figure 6 As shown, the auxiliary source activation indicator circuit 400 also includes a fuse F1 and a diode D8; The fuse F1 is connected to the second terminal of the switching transistor Q5 and the anode of the diode D8, respectively. The cathode of the diode D8 is connected to the switching transistor Q13. The fuse F1 is used to disconnect the output of the photovoltaic input source 100 when the input voltage of the photovoltaic input source 100 is too high, thereby preventing damage to downstream devices and improving the safety of the energy storage system 1. The diode D8 is used to prevent the voltage of the auxiliary power source 300 from flowing back into the photovoltaic input source 100.

[0090] This invention provides an auxiliary power source activation indicator circuit, comprising an activation module, a switch module, and an indicator module. The activation module is connected to both the switch module and a photovoltaic input source. The switch module is also connected to a power supply and the indicator module. Both the switch module and the indicator module are connected to an auxiliary power source. The activation module detects the input voltage of the photovoltaic input source and outputs an activation signal when the input voltage exceeds a first preset value to control the switch module to conduct. After the switch module is conducted, the power supply voltage from the power supply is input to the auxiliary power source. If the power supply voltage exceeds the activation voltage, the auxiliary power source is activated. At this time, the indicator module responds to the voltage signal output by the auxiliary power source and outputs a first indicator signal. Based on this, the power supply voltage is dually judged using the first preset value and the activation voltage, thereby avoiding the occurrence of erroneous activation of the auxiliary power source and improving the service life of the energy storage system. When the power supply voltage is less than the activation voltage, the indicator module responds to the power supply voltage and outputs a second indicator signal, thereby indicating that the auxiliary power source is not activated. Based on this, different indicator signals can be used to prompt users whether the auxiliary power source has been activated, thereby avoiding frequent start-ups and shutdowns of the auxiliary power source and increasing the stability of the energy storage system.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; under the concept of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the present invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An auxiliary source activation indicator circuit, characterized in that, The auxiliary source activation indicator circuit includes an activation module, a switch module, and an indicator module; The activation module is connected to the switch module and the photovoltaic input source respectively. The switch module is also connected to the power supply and the indicator module respectively. The switch module and the indicator module are also used to connect to the auxiliary power source. The activation module is used to detect the input voltage of the photovoltaic input source and output an activation signal when the input voltage is greater than a first preset value; The switching module is used to receive the activation signal and, based on the activation signal, conduct the power supply voltage of the power supply to the auxiliary source and the indicator module, wherein the auxiliary source is activated in response to the power supply voltage; The indicator module is used to output a first indicator signal in response to the voltage signal output by the auxiliary source when the auxiliary source is successfully activated; as well as When the auxiliary power source fails to activate, a second indication signal is output in response to the power supply voltage.

2. The auxiliary source activation indicator circuit according to claim 1, characterized in that, The indicator module is further configured to output the second indicator signal after a target time delay upon receiving the power supply voltage, wherein the target time is greater than the time taken from the auxiliary source being powered on and activated to output the voltage signal.

3. The auxiliary source activation indicator circuit according to claim 2, characterized in that, The indication module includes a delay control unit, a locking unit, and an indication unit; The delay control unit is connected to the indicator unit, the locking unit and the switch module respectively. The indicator unit is connected to the switch module and the auxiliary power source. The locking unit is connected to the auxiliary power source. The locking unit is used to output a locking signal to the delay control unit when it receives the voltage signal; The delay control unit is used to control the indicator unit to output the first indicator signal when the lock signal is received; If the lock signal is not received, the indicator unit outputs a second indicator signal in response to the power supply voltage and a delay of the target time.

4. The auxiliary source activation indicator circuit according to claim 3, characterized in that, The indicator unit includes a resistor R14 and a light-emitting diode D16; The resistor R14 is connected to the switch module and the auxiliary power source respectively. The resistor R14 is also connected to the anode of the light-emitting diode D16, and the cathode of the light-emitting diode D16 is connected to the delay control unit.

5. The auxiliary source activation indicator circuit according to claim 3, characterized in that, The delay control unit includes a switch Q9, a resistor R37, a resistor R15, a diode D17, and a capacitor C4; The control terminal of the switch Q9 is connected to the anode of the diode D17. The control terminal of the switch Q9 is also grounded through the capacitor C4. The first terminal of the switch Q9 is connected to the indicator unit. The second terminal of the switch Q9 is grounded. The cathode of the diode D17 is connected to the switch module and the auxiliary power source through the resistor R15. The cathode of the diode D17 is also connected to the locking unit.

6. The auxiliary source activation indicator circuit according to any one of claims 1 to 5, characterized in that, The auxiliary source activation indicator circuit also includes an energy storage module, which is connected to the common terminal of the switch module and the indicator module. The energy storage module is used to charge in response to the power supply voltage when the switch module is turned on. as well as When the switch module is disconnected, the indicator module is powered based on the stored electrical energy.

7. The auxiliary source activation indicator circuit according to any one of claims 1-5, characterized in that, The power supply is a photovoltaic input source or a battery, and the switching module includes a detection and control unit, a first switching unit and a second switching unit. The detection and control unit is connected to the activation module, the first switch unit and the second switch unit respectively. The first switch unit is connected to the photovoltaic input source and the auxiliary source respectively. The second switch unit is connected to the battery and the auxiliary source respectively. The detection and control unit is used to detect the battery voltage of the battery, and when it receives the activation signal and the battery voltage is greater than the voltage threshold, it outputs a control signal to the second switching unit to turn on the second switching unit, thereby enabling the battery to supply power to the auxiliary power source. as well as When the activation signal is received and the battery voltage is less than the voltage threshold, the activation signal is transmitted to the first switching unit to turn on the first switching unit, thereby enabling the photovoltaic input source to supply power to the auxiliary source.

8. The auxiliary source activation indicator circuit according to claim 7, characterized in that, The detection and control unit is also used to bypass the activation signal transmitted to the first switching unit when outputting a control signal, so as to control the first switching unit to disconnect.

9. The auxiliary source activation indicator circuit according to claim 8, characterized in that, The detection and control unit includes a battery detection subunit, a control subunit, and a bypass subunit; The control subunit is connected to the activation module, the battery detection subunit, the first switch unit, and the bypass subunit, respectively. The control subunit is also connected to the second switch unit, the bypass unit is also connected to the activation module, and the battery detection subunit is also used to connect to the battery. The battery detection subunit is used to detect the battery voltage of the battery and output a drive signal when the battery voltage is greater than a voltage threshold. The control subunit is used to transmit the activation signal to the first switching unit when the activation signal is received, so as to turn on the first switching unit; as well as Upon receiving the activation signal and the drive signal, a control signal is output to turn on the second switching unit based on the control signal. The bypass subunit is used to receive the control signal and start working according to the control signal to bypass the activation signal transmitted to the first switching unit, thereby controlling the first switching unit to open.

10. An energy storage system, characterized in that, The energy storage system includes: Photovoltaic input source; Power supply; Auxiliary source; and The auxiliary source activation indicator circuit as described in any one of claims 1-9.

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