Auxiliary source activation indication circuit and energy storage system

Abstract

The application relates to the technical field of energy storage power supplies, and mainly provides an auxiliary power supply activation indication circuit and an energy storage system, which comprises a switch module, an activation module and an indication module 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 power supply. The activation module is used for controlling the switch module to be turned on when the input voltage of the photovoltaic input source is greater than a first preset value. When the switch module is turned on, the power supply voltage of the power supply is input to the auxiliary power supply, at this time, if the power supply voltage is greater than an activation voltage, the indication module responds to the voltage signal output by the auxiliary power supply to output a first indication signal to indicate that the auxiliary power supply is activated; if the power supply 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 power supply is not activated. Based on this, the user can be prompted whether the auxiliary power supply is activated through different indication signals, so that the situation that the auxiliary power supply is frequently started and stopped is avoided, and the stability of the energy storage system is increased.

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 cannot 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

[0004] 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.

[0005] 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;

[0006] 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.

[0007] 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;

[0008] 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;

[0009] The indication module is configured to output a first indication signal in response to a voltage signal output by the auxiliary power supply when the auxiliary power supply is successfully activated; and

[0010] output a second indication signal in response to the power supply voltage when the auxiliary power supply is not successfully activated.

[0011] Optionally, the indication module is further configured to output the second indication signal after a target time when the power supply voltage is received, wherein the target time is greater than a time required for the auxiliary power supply to be powered on and activated to output the voltage signal.

[0012] Optionally, the indication module comprises a delay control unit, a locking unit and an indication unit.

[0013] The delay control unit is connected to the indication unit, the locking unit and the switch module, respectively; the indication unit is connected to the switch module and the auxiliary power supply; and the locking unit is connected to the auxiliary power supply.

[0014] The locking unit is configured to output a locking signal to the delay control unit when the voltage signal is received.

[0015] The delay control unit is configured to control the indication unit to output the first indication signal when the locking signal is received.

[0016] The delay control unit is configured to control the indication unit to output the second indication signal after a target time in response to the power supply voltage when the locking signal is not received.

[0017] Optionally, the indication unit comprises a resistor R14 and a light-emitting diode D16.

[0018] The resistor R14 is connected to the switch module and the auxiliary power supply, respectively; the resistor R14 is further 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.

[0019] Optionally, the delay control unit comprises a switch tube Q9, a resistor R37, a resistor R15, a diode D17 and a capacitor C4.

[0020] The control end of the switch tube Q9 is connected to the anode of the diode D17; the control end of the switch tube Q9 is further grounded through the capacitor C4; the first end of the switch tube Q9 is connected to the indication unit; the second end of the switch tube Q9 is configured to be grounded; the cathode of the diode D17 is connected to the switch module and the auxiliary power supply through the resistor R15; and the cathode of the diode D17 is further connected to the locking unit.

[0021] Optionally, the auxiliary source activation indication circuit further comprises a storage module, the storage module is connected to a common end of the switch module and the indication module, and the storage module is used for charging in response to the power supply voltage when the switch module is turned on; and

[0022] The indication module is powered by the stored electrical energy when the switch module is turned off.

[0023] Optionally, the power supply is a photovoltaic input source or a battery, and the switch module comprises a detection control unit, a first switch unit and a second switch unit;

[0024] The detection 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, and the second switch unit is connected to the battery and the auxiliary source respectively;

[0025] The detection control unit is used for detecting the battery voltage of the battery, and outputting a control signal to the second switch unit to turn on the second switch unit when the activation signal is received and the battery voltage is greater than a voltage threshold, so that the battery supplies power to the auxiliary source; and

[0026] When the activation signal is received and the battery voltage is less than the voltage threshold, the activation signal is transmitted to the first switch unit to turn on the first switch unit, so that the photovoltaic input source supplies power to the auxiliary source.

[0027] Optionally, the detection control unit is further used for bypassing the activation signal transmitted to the first switch unit to control the first switch unit to be turned off when the control signal is outputted.

[0028] Optionally, the detection control unit comprises a battery detection subunit, a control subunit and a bypass subunit;

[0029] 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 further connected to the second switch unit, the bypass subunit is further connected to the activation module, and the battery detection subunit is further used for connecting the battery;

[0030] The battery detection subunit is used for detecting the battery voltage of the battery and outputting a driving signal when the battery voltage is greater than a voltage threshold.

[0031] The control subunit is used for transmitting the activation signal to the first switch unit to turn on the first switch unit when the activation signal is received; and

[0032] output a control signal when the activation signal is received and the driving signal is received, so that the second switch unit is turned on based on the control signal;

[0033] The bypass sub-unit is configured to receive the control signal and start working according to the control signal to bypass the activation signal transmitted to the first switch unit, so as to control the first switch unit to be turned off.

[0034] To solve the above technical problems, another technical solution adopted by the embodiments of the present application is to provide an energy storage system, which comprises:

[0035] a photovoltaic input source;

[0036] a power supply;

[0037] an auxiliary source; and

[0038] an auxiliary source activation indication circuit as described above.

[0039] Unlike the related art, the present application provides an auxiliary source activation indication circuit and an energy storage system, the auxiliary source activation indication circuit comprising an activation module, a switch module and an indication module; the activation module is connected with the switch module and the photovoltaic input source respectively, the switch module is further connected with the power supply and the indication module respectively, and the switch module and the indication module are further both configured to be connected with the auxiliary source. The activation module is configured to detect an input voltage of the photovoltaic input source, and output an activation signal when the input voltage is greater than a first preset value, so as to control the switch module to be turned on. After the switch module is turned on, the power supply voltage of the power supply is input to the auxiliary source, at this time, if the power supply voltage is greater than an activation voltage, the auxiliary source can be activated, at this time, the indication module can output a first indication signal in response to a voltage signal output by the auxiliary source. Based on this, the power supply voltage is judged by the first preset value and the activation voltage, so as to avoid the situation of the auxiliary source being mistakenly started, and thus the service life of the energy storage system is improved. When the power supply voltage is less than the activation voltage, the indication module responds to the power supply voltage and outputs a second indication signal, so as to indicate that the auxiliary source is not activated. Based on this, the user can be prompted by the different indication signals whether the auxiliary source is activated, so as to avoid the situation of the auxiliary source being frequently started and stopped, and the stability of the energy storage system is increased. BRIEF DESCRIPTION OF DRAWINGS

[0040] One or more embodiments are illustrated by way of example with reference to the accompanying drawings, which are schematic and not intended to be limiting of the embodiments, and in which like reference numerals refer to like elements in the various figures, unless otherwise indicated. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the embodiments.

[0041] Figure 1is a structural block diagram of an auxiliary source activation indication circuit provided by an embodiment of the present application;

[0042] Figure 2 is a structural block diagram of an auxiliary source activation indication circuit provided by an embodiment of the present application;

[0043] Figure 3 is a circuit diagram of an auxiliary source activation indication circuit provided by an embodiment of the present application;

[0044] Figure 4 is a circuit diagram of another auxiliary source activation indication circuit provided by an embodiment of the present application;

[0045] Figure 5 is a structural block diagram of another auxiliary source activation indication circuit provided by an embodiment of the present application;

[0046] Figure 6 is a circuit diagram of still another auxiliary source activation indication circuit provided by an embodiment of the present application. DETAILED DESCRIPTION

[0047] In order to make the objects, technical solutions and advantages of the present application clearer, the present application 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 only used to explain the present application and should not be used to limit the present application.

[0048] It should be noted that, if there is no conflict, each feature in the embodiments of the present application can be combined with each other, and all within the scope of protection of the present application. In addition, although the functional modules are divided in the device schematic diagram, and the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order from the module division in the device schematic diagram or the order in the flowchart.

[0049] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used in the present application includes any and all combinations of one or more related listed items.

[0050] Please refer to Figure 1 , Figure 1 is a structural block diagram of an auxiliary source activation indication circuit provided by an embodiment of the present application, as Figure 1As shown, the energy storage system 1 comprises a photovoltaic input source 100, a power supply 200, an auxiliary source 300 and an auxiliary source activation indication circuit 400; the auxiliary source activation indication circuit 400 is connected with the photovoltaic input source 100, the power supply 200 and the auxiliary source 300 respectively; the auxiliary source activation indication circuit 400 is used for receiving the input voltage of the photovoltaic input source 100 and starting to work when the input voltage of the photovoltaic input source 100 is greater than a first preset value. At this time, the auxiliary source activation indication 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 indication circuit 400 judges whether the auxiliary source 300 is activated and outputs a first indication signal when the auxiliary source 300 is activated and outputs a second indication signal when the auxiliary source 300 is not activated to prompt whether the auxiliary source 300 is normally activated. Based on this, the resource waste can be avoided, thereby improving the reliability of the energy storage system 1.

[0051] In some embodiments, as Figure 1 As shown, the energy storage system 1 further comprises a battery 500, wherein when the energy storage system 1 starts to work, the power supply 200 can be the photovoltaic input source 100 or the battery 500. When the power supply 200 is the photovoltaic input source 100, the power supply voltage is the input voltage of the photovoltaic input source 100; and when the power supply 200 is the battery 500, the power supply voltage is the battery voltage of the battery 500.

[0052] In some embodiments, please refer to Figure 2 , Figure 2 is a structural block diagram of an auxiliary source activation indication circuit provided by the embodiment of the present application, as Figure 2 As shown, the auxiliary source activation indication circuit 400 comprises an activation module 41, a switch module 42 and an indication module 43;

[0053] The activation module 41 is connected with the switch module 42 and the photovoltaic input source 100 respectively, the switch module 42 is further connected with the power supply 200 and the indication module 43 respectively, and the switch module 42 and the indication module 43 are further used for being connected with the auxiliary source 300;

[0054] The activation module 41 is used for detecting the input voltage of the photovoltaic input source 100 and outputting an activation signal when the input voltage is greater than a first preset value;

[0055] The switch module 42 is configured to receive the activation signal and turn on based on the activation signal, and transmit the power supply voltage of the power supply 200 to the auxiliary source 300 and the indication module 43, wherein the auxiliary source 300 is activated in response to the power supply voltage;

[0056] The indication module 43 is configured to output a first indication signal in response to the voltage signal output by the auxiliary source 300 when the auxiliary source 300 is successfully activated; and

[0057] Output a second indication signal in response to the power supply voltage when the auxiliary source 300 is not successfully activated.

[0058] Specifically, when the photovoltaic input source 100 is connected to the auxiliary source activation indication circuit 400, the photovoltaic input source 100 will input a corresponding input voltage according to the light condition. 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. The switch module 42 will turn on based on the activation signal after receiving the activation signal. When the switch module 42 is turned on, the power 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 power supply voltage, the auxiliary source 300 will start working, thereby outputting a voltage signal to the indication module 43, so that the indication module 43 outputs a first indication 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 indication module 43. When the indication module 43 receives the power supply voltage, it will output a second indication signal based on the power supply voltage. Based on this, in actual use, the user can determine whether the auxiliary source 300 is activated by observing the indication signal output by the indication module 43, so that the user can respond in time when the auxiliary source 300 is not activated, thereby avoiding the waste of resources.

[0059] In some embodiments, the first indication signal and the second indication signal can be different color indicator lights, for example, the first indication signal is a green light and the second indication signal is a red light; or they can be the same color but different states, for example, the first indication signal is a constant light and the second indication signal is a light-off or flashing 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 activated auxiliary source 300 and the unactivated auxiliary source 300, which are not limited here.

[0060] It should be noted that in some embodiments, when the power supply 200 is a photovoltaic input source, if the switch module 42 is turned on, the photovoltaic input source 100 will supply power to the auxiliary source 300 through the switch module 42, at this time the photovoltaic input source 100 is in a loaded state. It should be known that when the photovoltaic input source is loaded, its input voltage will be pulled down, so if the input voltage of the photovoltaic input source 100 is just greater than the first preset value, it will cause the voltage input to the auxiliary source 300 to be insufficient to activate the auxiliary source 300. When the auxiliary source 300 is not successfully activated, even if the subsequent input voltage of the photovoltaic input source meets the activation condition of the auxiliary source 300, the auxiliary source 300 cannot be activated, thereby causing the input voltage of the photovoltaic input source to be unable to be effectively utilized, and further causing a large amount of waste of resources. When the power supply 200 is a battery 500, when the switch module 42 is turned on, the battery 500 will supply power to the auxiliary source 300 through the switch module 42, at this time if the battery is under voltage, the voltage output by the battery 500 is insufficient to activate the auxiliary source 300, and the battery will always be in a discharging state, thereby causing the battery to be over-discharged and affecting the service life of the battery. Therefore, by introducing the indication module 43, the activation of the auxiliary source 300 can be indicated, thereby improving the reliability of the energy storage system.

[0061] In another embodiment, the indication module 43 is further configured to output the second indication signal after a target time when the power supply voltage is received, wherein the target time is greater than a time required for the auxiliary source 300 to be powered on and activated to output the voltage signal.

[0062] Specifically, when the switch module 42 outputs the power supply voltage of the power supply 200, the indication module 43 and the auxiliary source 300 will both receive the power supply voltage, at this time the indication module 43 will prolong the target time in response to the power supply voltage, and within the target time, if the power supply voltage successfully activates the auxiliary source 300, the auxiliary source 300 will output a voltage signal to the indication module 43, so that the indication module 43 outputs a first indication signal based on the voltage signal; and if the auxiliary source 300 is not activated, the indication module 43 will output a second indication signal based on the received power supply voltage after the target time.

[0063] In yet another embodiment, as shown in Figure 2 The indication module 43 includes a delay control unit 431, a locking unit 432, and an indication unit 433;

[0064] The delay control unit 431 is connected with the indication unit 433, the locking unit 432, and the switch module 42, respectively, and the indication unit 433 and the locking unit 432 are also connected with the auxiliary source 300.

[0065] The locking unit 432 is configured to output a locking signal to the delay control unit 431 when receiving the voltage signal;

[0066] The delay control unit 431 is configured to control the indication unit 433 to output the first indication signal when receiving the locking signal;

[0067] When not receiving the locking signal, the indication unit 433 is controlled to output a second indication signal in response to the supply voltage after a delay target time.

[0068] 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 outputs a voltage signal to the locking unit 432. When the locking unit 432 receives the voltage signal, the locking unit 432 outputs a locking signal to the delay control unit 431 based on the voltage signal, so that the delay control unit 431 controls the indication unit 433 to output a first indication signal. If the auxiliary source 300 is not activated, the auxiliary source 300 does not output the voltage signal, and the locking unit 432 does not output the locking signal. When the delay control unit 431 does not receive the locking signal after a target time, the delay control unit 431 inputs the supply voltage to the indication unit 433, so that the indication unit 433 outputs a second indication signal, prompting that the auxiliary source 300 is not activated.

[0069] In some embodiments, referring to Figure 3 , Figure 3 is a circuit diagram of an auxiliary source activation indication circuit provided by an embodiment of the present application, as shown in Figure 3 The delay control unit 431 includes a switch tube Q9, a resistor R37, a resistor R15, a diode D17, and a capacitor C4. The locking unit 432 includes a switch tube Q20 and a resistor R17. The indication unit 433 includes a resistor R14 and a light-emitting diode D16.

[0070] The control end of the switch tube Q9 is connected with the anode of the diode D17. The control end of the switch tube Q9 is also grounded through the capacitor C4. The first end of the switch tube Q9 is connected with the indication unit 433. The second end of the switch tube Q9 is used for grounding. The cathode of the diode D17 is connected with the switch module 42 and the auxiliary source 300 through the resistor R15. The cathode of the diode D17 is also connected with the locking unit 432.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] 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

[0076] When the switch module 42 is disconnected, the indicator module 43 is powered based on the stored electrical energy.

[0077] Specifically, when the switch module 42 is turned on, the energy storage module 44 receives and stores the power supply voltage. At this time, if the auxiliary source 300 is activated, the indication module 43 responds to the voltage signal output by the auxiliary source 300 and outputs a first indication signal based on the voltage signal. If the auxiliary source 300 is not activated and the switch module 42 is turned off, the energy storage module 44 outputs the stored voltage to the indication module 43, so that the indication module 43 outputs a second indication signal based on the voltage.

[0078] In yet another embodiment, as shown in Figure 3 The energy storage module 44 is a capacitor C5.

[0079] 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.

[0080] The capacitor C5 is used to store energy when the switch module 42 is turned on, and discharge when the auxiliary source 300 is not activated and the switch module 42 is turned off, so that the indication module 43 outputs a second indication signal.

[0081] In yet another embodiment, when the power supply 200 is the battery, if the battery is in an under-voltage state, it will cause the battery to be over-discharged. Therefore, in order to avoid the over-discharge of the battery, as shown in Figure 2 The switch module 42 includes a detection control unit 421, a first switch unit 422 and a second switch unit 423.

[0082] The detection 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.

[0083] The detection control unit 421 is used to detect the battery voltage of the battery, and output a control signal to the second switch unit 423 when receiving the activation signal and the battery voltage is greater than a voltage threshold, so that the second switch unit 423 is turned on, and the battery supplies power to the auxiliary source 300; and

[0084] When receiving the activation signal and the battery voltage is less than a voltage threshold, the activation signal is transmitted to the first switch unit 422, so that the first switch unit 422 is turned on, and the photovoltaic input source 100 supplies power to the auxiliary source 300;

[0085] Specifically, the detection control unit 421 detects the battery voltage of the battery 500 upon receiving the activation signal, and outputs a control signal to the second switch unit 423 when the battery voltage is greater than a voltage threshold, so that the second switch unit 423 is turned on based on the control signal, thereby causing the battery 500 to output the battery voltage to the auxiliary source 300 through the second switch unit 423, so as to activate the auxiliary source 300 and supply power to the auxiliary source 300. If the detection control unit 421 detects that the battery voltage is less than the voltage threshold upon receiving the activation signal, the detection control unit 421 transmits the activation signal to the first switch unit 422, so that the first switch unit 422 is turned on based on the activation signal, thereby causing the input voltage of the photovoltaic input source 100 to be input to the auxiliary source 300 through the first switch unit 422, so that the auxiliary source 300 starts to work based on the input voltage. In this way, the battery 500 can be used to supply power to the auxiliary source 300 when the battery 500 has power, and the photovoltaic input source 100 can be used to supply power to the auxiliary source 300 when the battery 500 has no power, thereby effectively avoiding over-discharge of the battery 500.

[0086] In yet another embodiment, the detection control unit 421 is further configured to bypass the activation signal transmitted to the first switch unit 422 to control the first switch unit 422 to be turned off when the control signal is output. It should be noted that the voltage of the battery 500 is more stable than that of the photovoltaic input source 100, so the battery 500 needs to supply power to the auxiliary source 300 when the battery has power. In this embodiment, when the detection control unit 421 receives the activation signal and the battery voltage is greater than the voltage threshold, on one hand, the detection control unit 421 outputs a control signal to the second switch unit 423 to control the battery 500 to supply power to the auxiliary source 300 and activate the auxiliary source 300; on the other hand, the detection control unit 421 bypasses the activation signal transmitted to the first switch unit 422, so that the first switch 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 transmits the activation signal to the first switch unit 422 only when the detection control unit 421 receives the activation signal and the battery voltage is less than the voltage threshold, so that the first switch unit 422 is turned on.

[0087] In another embodiment, the detection control unit 421 is further configured to delay transmission of the activation signal to the first switch unit 422 by a preset time when the activation signal is received and the battery voltage is less than the voltage threshold. Wherein, after the activation module 41 outputs the activation signal, the detection control unit 421 receives and stores the activation signal. At this time, if the battery voltage is greater than the voltage threshold, the detection control unit 421 bypasses the stored activation signal, so as to avoid the stored activation signal from being transmitted to the first switch unit 422, resulting in the first switch unit 422 being turned on. If the battery voltage is less than the voltage threshold, the stored activation signal will not be bypassed, and the detection control unit 421 transmits the activation signal to the first switch unit 422 after delaying a preset time, so as to make the first switch unit 422 be turned on. It should be noted that, after the detection control unit 421 receives the activation signal, the detection control unit 421 determines whether the battery voltage is greater than the voltage threshold. In order to avoid the activation signal being transmitted to the first switch unit 422 during the determination process, the detection control unit 421 stores the activation signal input to the first switch unit 422. At this time, if the battery voltage is greater than the voltage threshold, the stored activation signal is bypassed to avoid the first switch unit 422 being turned on. If the battery voltage is less than the voltage threshold, the activation signal input to the first switch unit 422 can be output after being delayed for a preset time, thereby avoiding the case that the photovoltaic input source 100 supplies power to the auxiliary source 300 when the battery 500 has power.

[0088] In some embodiments, as shown in FIG. 4, the detection control unit 421 includes a battery detection subunit 4211, a control subunit 4212, and a bypass subunit 4213. Figure 2

[0089] The control subunit 4212 is connected with 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 with the second switch unit 423. The bypass subunit 4213 is also connected with the activation module 41. The battery detection subunit 4211 is also configured to be connected with the battery 500.

[0090] The battery detection subunit 4211 is configured to detect the battery voltage of the battery 500 and output a driving signal when the battery voltage is greater than a voltage threshold.

[0091] The control subunit 4212 is configured to transmit the activation signal to the first switch unit 422 when the activation signal is received, so as to make the first switch unit 422 be turned on.

[0092] ​output a control signal when the activation signal is received and the driving signal is received, so that the second switch unit 423 is turned on based on the control signal;

[0093] The bypass sub-unit 4213 is configured to receive the control signal and start working according to the control signal, so as to bypass the activation signal transmitted to the first switch unit 422, thereby controlling the first switch unit 422 to be turned off; and

[0094] stop working when the control signal is not received.

[0095] Specifically, the battery detection sub-unit 4211 detects the battery voltage of the battery 500 in real time, and outputs a driving signal when the battery voltage is greater than a voltage threshold, and stops outputting the driving signal when the battery voltage is less than the voltage threshold.

[0096] After the activation module 41 outputs the activation signal, the control sub-unit 4212 receives the activation signal and transmits the activation signal to the first switch unit 422. Meanwhile, the control sub-unit 4212 also determines whether the driving signal is received. If the control sub-unit 4212 receives the driving signal, the control sub-unit 4212 outputs a control signal to the second switch unit 423 and the bypass sub-unit 4213. When the second switch unit 423 receives the control signal, the second switch unit 423 is turned on based on the control signal, so that the battery voltage is transmitted to the auxiliary source 300. When the bypass sub-unit 4213 receives the control signal, the bypass sub-unit 4213 starts working based on the control signal, so as to bypass the activation signal transmitted to the first switch unit 422, thereby avoiding the activation signal input to the first switch unit 422, so that the first switch unit 422 is turned off. Based on this, the battery 500 can supply power to the auxiliary source 300 alone, thereby avoiding the influence of unstable input voltage of the photovoltaic input source 100.

[0097] When the control sub-unit 4212 does not receive the driving signal, the control sub-unit 4212 does not output the control signal, so that the second switch unit 423 is turned off, and the bypass sub-unit 4213 also stops working. At this time, the control sub-unit 4212 successfully transmits the activation signal to the first switch unit 422, so that the first switch unit 422 is turned on based on the activation signal. When the first switch unit 422 is turned on, the input voltage of the photovoltaic input source 100 is transmitted to the auxiliary source 300 through the first switch unit 422, thereby supplying power to the auxiliary source 300.

[0098] In yet another embodiment, asFigure 2 As shown, the detection control unit 421 further comprises a delay sub-unit 4214;

[0099] The delay sub-unit 4214 is connected with the activation module 41, the bypass sub-unit 4213 and the first switch unit 422 respectively;

[0100] The delay sub-unit 4214 is configured to receive the activation signal and input the activation signal to the first switch unit 422 after delaying for a preset time when the bypass sub-unit 4213 stops working, so as to make the first switch unit 422 conductive.

[0101] Specifically, when the control sub-unit 4212 transmits the activation signal to the first switch unit 422, the delay sub-unit 4214 receives and stores the activation signal transmitted to the first switch unit 422. When the bypass sub-unit 4213 starts working, the activation signal is discharged through the bypass sub-unit 4213, so as to avoid the first switch unit 422 being conductive. When the control sub-unit 4212 stops outputting the control signal, the bypass sub-unit 4213 stops working. At this time, the activation signal is not discharged through the bypass sub-unit 4213, and the delay sub-unit 4214 inputs the activation signal to the first switch unit 422 after delaying for a preset time, so as to control the first switch unit 422 being conductive.

[0102] It should be noted that when the control sub-unit 4212 transmits the activation signal to the first switch unit 422, the first switch unit 422 is conductive, and the photovoltaic input source 100 supplies power to the auxiliary source 300 through the first switch unit 422. However, the input voltage of the photovoltaic input source 100 is unstable, which is easy to cause safety problems of the auxiliary source 300. Therefore, by introducing the delay sub-unit 4214, when the control sub-unit 4212 transmits the activation signal to the first switch unit 422, the delay sub-unit 4214 receives the activation signal, so as to avoid the case that the first switch unit 422 is conductive (photovoltaic power supply) when the battery voltage is greater than the voltage threshold. Based on this, the battery 500 is preferred to supply power to the auxiliary source 300 when the battery 500 has power. Only when the battery voltage of the battery 500 is lower than the voltage threshold (under-voltage), the photovoltaic input source 100 supplies power to the auxiliary source 300, so as to avoid over-discharge of the battery 500.

[0103] In some embodiments, please refer to Figure 4 , Figure 4 is another auxiliary source activation indication circuit provided by the embodiment of the application, as shown in Figure 4 ​As shown, the battery detection subunit 4211 includes a diode D7, a voltage stabilizing tube D9 and a resistor R16;

[0104] The anode of the diode D7 is connected with the battery 500, the cathode of the diode D7 is connected with the cathode of the voltage stabilizing tube D9, and the anode of the voltage stabilizing tube D9 is connected with the control subunit 4212 through the resistor R16.

[0105] Specifically, when the auxiliary source activation indication circuit 400 starts to work, the battery voltage of the battery 500 is input to the voltage stabilizing tube D9 through the diode D7. At this time, if the battery voltage is greater than the voltage stabilizing value of the voltage stabilizing tube D9, the voltage stabilizing tube D9 is broken down, thereby outputting a driving signal to the control subunit 4212; and if the battery voltage is less than the voltage stabilizing value of the voltage stabilizing tube D9, the voltage stabilizing tube D9 is in a cut-off state, and the control subunit 4212 will not receive the driving signal. It should be noted that the voltage threshold is determined according to the voltage stabilizing value of the voltage stabilizing tube D9, and the selection of the voltage stabilizing tube D9 is determined according to the battery 500. By selecting a voltage stabilizing tube with a suitable voltage stabilizing value, the over-discharge of the battery 500 can be avoided.

[0106] In yet another embodiment, as shown in Figure 3 As shown, the control subunit 4212 includes a switch tube Q10, a switch tube Q11 and a resistor R18;

[0107] The control end of the switch tube Q10 is connected with the activation module 41, the first end of the switch tube Q10 is connected with the control end of the switch tube Q11, the second end of the switch tube Q10 is used for grounding, the first end of the switch tube Q11 is connected with the battery detection subunit 4211, the second end of the switch tube Q11 is grounded through the resistor R18, and the second end of the switch tube Q11 is also connected with the second switch unit 423 and the bypass subunit 4213 respectively.

[0108] When the activation module 41 outputs an activation signal, the switch tube Q10 will be turned on based on the activation signal, and the activation signal will also be transmitted to the first switch unit 422. At this time, if the battery detection subunit 4211 outputs a driving signal, the switch tube Q11 will also be turned on, thereby outputting a control signal to the second switch unit 423 and the bypass subunit 4213. When the switch tube Q10 is turned on, the switch tube Q11 does not receive the driving signal, and the switch tube Q11 is cut off, thereby stopping outputting the control signal.

[0109] In another embodiment, as shown in Figure 3As shown, the second switch unit 423 includes a switch tube Q19, a switch tube Q18, a diode D14, a resistor R29, a resistor R30 and a resistor R31.

[0110] The control end of the switch tube Q19 is connected with the cathode of the diode D14 through the resistor R29, the anode of the diode D14 is connected with the control sub-unit 4212, the first end of the switch tube Q19 is connected with the control end of the switch tube Q18 through the resistor R31, the second end of the switch tube Q19 is used for grounding, the control end of the switch tube Q18 is also connected with the first end of the switch tube Q18 through the resistor R30, the first end of the switch tube Q18 is also connected with the battery 500, and the second end of the switch tube Q18 is connected with the auxiliary source 300.

[0111] Specifically, after the control sub-unit 4212 outputs a control signal, the control end of the switch tube Q19 receives the control signal through the resistor R29 and the diode D14, and is turned on according to the control signal. After the switch tube Q19 is turned on, the voltage of the control end of the switch tube Q18 is pulled down, so that the switch tube Q18 is turned on. After the switch tube Q18 is turned on, the battery voltage of the battery 500 can supply power to the auxiliary source 300 through the switch tube Q18.

[0112] In yet another embodiment, as Figure 4 As shown, the bypass sub-unit 4213 includes a resistor R19 and a switch tube Q12, and the delay sub-unit 4214 includes a resistor R38 and a capacitor C2.

[0113] The control end of the switch tube Q12 is connected with the control sub-unit 4212 through the resistor R19, the first end of the switch tube Q12 is connected with the activation module 41, and the second end of the switch tube Q12 is used for grounding.

[0114] The first end of the capacitor C2 is connected with the activation module 41 and the bypass sub-unit 4213 respectively through the resistor R38, and the second end of the capacitor C2 is used for grounding.

[0115] Specifically, when the activation module 41 outputs an activation signal, the control subunit 4212 receives the activation signal, and the capacitor C2 also receives the activation signal transmitted to the first switch unit 422 and starts charging based on the activation signal. At this time, if the battery voltage is greater than the voltage threshold, the control subunit 4212 outputs a control signal, and the switch tube Q12 is turned on based on the control signal. When the switch tube Q12 is turned on, the activation signal transmitted to the first switch unit 422 is discharged through the switch tube Q12, and the capacitor C2 is also discharged through the resistor R38 and the switch tube Q12, thereby bypassing the activation signal and ensuring that the first switch unit 422 is in an off state. If the control subunit 4212 does not output the control signal, the switch tube Q12 is in a cut-off state, and at this time the capacitor C2 continuously receives the activation signal transmitted to the first switch unit 422 and outputs the activation signal to the first switch unit 422 after a predetermined time delay, so that the first switch unit 422 is turned on.

[0116] In yet another embodiment, as shown in Figure 4 the first switch unit 422 includes a switch tube Q13, a switch tube Q14, a resistor R21, a resistor R22, a resistor R23, and a resistor R24.

[0117] The control end of the switch tube Q14 is connected to the detection control unit 421 through the resistor R22, the first end of the switch tube Q14 is connected to the control end of the switch tube Q13 through the resistor R21, the second end of the switch tube Q14 is grounded through the resistor R24, the control end of the switch tube Q13 is also connected to the second end of the switch tube Q13 through the resistor R23, the first end of the switch tube Q13 is connected to the activation module 41, and the second end of the switch tube Q13 is also used to connect the auxiliary source 300.

[0118] Specifically, when the detection control unit 421 transmits the activation signal to the first switch unit 422, the control end of the switch tube Q14 receives the activation signal and is turned on based on the activation signal, and when the switch tube Q14 is turned on, the switch tube Q13 is also turned on. When the switch tube Q13 is turned 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 switch tube Q13 to supply power to the auxiliary source 300. Based on this, the auxiliary source 300 can be powered by the photovoltaic input source 100 when the battery 500 is under-voltage, thereby maintaining the working state of the auxiliary source 300 while avoiding over-discharge of the battery 500.

[0119] In some embodiments, the first switch unit 422 further comprises a diode D11 and a resistor R35; a cathode of the diode D11 is connected with the switch tube Q14, and an anode of the diode D11 is connected with the auxiliary power supply 300 through the resistor R35.

[0120] It can be known that the activation signal is a single pulse signal, when the activation signal stops, the switch tube Q14 is turned off, and the switch tube Q13 is also turned off, at this time, the photovoltaic input source 100 stops supplying power to the auxiliary power supply 300. Therefore, in order to make the auxiliary power supply 300 continue to work, when the auxiliary power supply 300 starts to work based on the input voltage of the photovoltaic input source 100, the auxiliary power supply 300 also outputs an auxiliary power supply voltage to the control end of the switch tube Q14 through the diode D11, so as to make the switch tube Q14 maintain a conduction state. Based on this, the first switch unit 422 can still be controlled to maintain a conduction state after the activation signal ends, so as to make the photovoltaic input source 100 continuously supply power to the auxiliary power supply 300.

[0121] In still another embodiment, as shown in Figure 4 the first switch unit 422 further comprises a diode D10, a cathode of the diode D10 is connected with the control end of the switch tube Q14, and an anode of the diode D10 is connected with the delay sub-unit 4214. Wherein, through the unidirectional conduction of the diode, the auxiliary power supply voltage output by the auxiliary power supply 300 can be prevented from flowing back to the delay sub-unit 4214.

[0122] In still another embodiment, as shown in Figure 3 the energy storage system 1 further comprises a controller (not shown in the figure), and the second switch unit 423 further comprises a diode D13. An anode of the diode D13 is connected with the controller, and a cathode of the diode D13 is connected with the switch tube Q19 through the resistor R29.

[0123] Specifically, when the battery 500 outputs the battery voltage to activate the auxiliary power supply 300, the auxiliary power supply 300 starts to work based on the battery voltage, at this time, the controller continuously outputs a conduction control signal to the control end of the switch tube Q19 through the diode D13, so as to make the switch tube Q19 maintain a conduction state, thereby making the battery 500 continuously supply power to the auxiliary power supply 300.

[0124] In another embodiment, as shown in Figure 4 the first switch unit 422 further comprises a switch tube Q15 and a resistor R25, a control end of the switch tube Q15 is connected with the controller through the resistor R25, a first end of the switch tube Q15 is connected with the control end of the switch tube Q14, and a second end of the switch tube Q15 is used for grounding.

[0125] It can be known that when the auxiliary source 300 starts to work based on the battery voltage, the controller also inputs the turn-on control signal to the switch tube Q15 through the resistor R25, so as to make the switch tube Q15 turn on. When the switch tube Q15 turns on, the voltage at the control end of the switch tube Q14 is pulled down, so that the switch tube Q14 is maintained in the off state, and the switch tube Q13 is also maintained in the off state. Based on this, the false turn-on of the switch tube Q14 can be avoided, so as to improve the reliability of the auxiliary source activation indication circuit 400.

[0126] In some embodiments, when the battery voltage of the battery 500 is lower than the voltage threshold (battery undervoltage), after the auxiliary source 300 is activated by the photovoltaic input source 100, the photovoltaic input source 100 not only supplies power to the auxiliary source 300, but also inputs the input voltage to the battery 500 to charge the battery 500. When the battery voltage of the battery 500 is greater than the voltage threshold after charging, the controller outputs the turn-on control signal to the switch tube Q19 through the diode D13, so as to make the switch tube Q19 turn on, so as to switch to the battery 500 to supply power to the auxiliary source 300, thereby improving the stability of the auxiliary source activation indication circuit 400.

[0127] In some embodiments, please refer to Figure 5 , Figure 5 is another structure block diagram of an auxiliary source activation indication circuit provided by the embodiment of the application, as Figure 5 shown, the activation module 41 includes a photovoltaic detection unit 411, a first control unit 412 and an activation signal generation unit 413;

[0128] The photovoltaic detection unit 411 is connected with the first control unit 412, the first control unit 412 is respectively connected with the activation signal generation unit 413 and the switch module 42, the activation signal generation unit 413 is also connected with the switch module 42, and the photovoltaic detection unit 411 and the first control unit 412 are also connected with the photovoltaic input source 100;

[0129] The photovoltaic detection unit 411 is configured to detect the input voltage of the photovoltaic input source 100, and control the first control unit 412 to start to work when the input voltage is greater than a first preset value, so that the first control unit 412 transmits the input voltage of the photovoltaic input source 100.

[0130] The activation signal generation unit 413 is configured to receive and store the input voltage after the first control unit 412 starts to work, and output an activation signal based on the stored voltage; and

[0131] stop outputting the activation signal when the stored voltage is greater than a preset voltage, wherein the preset voltage is less than the first preset value.

[0132] 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. When 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; and when the activation signal generation unit 413 stores a voltage greater than a preset voltage, the activation signal generation unit 413 stops outputting the activation signal.

[0133] In some embodiments, please refer to Figure 6 , Figure 6 is another circuit diagram of the auxiliary source activation indication circuit provided by the embodiment of the present application, as Figure 6 shown, the photovoltaic detection unit 411 includes a voltage stabilizing tube D2, a switch tube Q2, a resistor R2 and a resistor R4; the first control unit 412 includes a resistor R7, a resistor R8, a resistor R9, a switch tube Q4, a switch tube Q5 and a voltage stabilizing tube D4; the activation signal generation unit 413 includes a switch tube Q6, a resistor R10, a resistor R11, a diode D5 and a capacitor C1;

[0134] The switch tube Q2 is connected to the anode of the voltage stabilizing tube D2 through the resistor R2, the cathode of the voltage stabilizing tube D2 is connected to the photovoltaic input source 100, the first end of the switch tube Q2 is connected to the first control unit 412 through the resistor R4, and the second end of the switch tube Q2 is grounded.

[0135] The control end of the switch tube Q4 is connected to the photovoltaic detection unit 411, the first end of the switch tube Q4 is connected to the control end of the switch tube Q5 through the resistor R8, the second end of the switch tube Q4 is also grounded through the resistor R7, the first end of the switch tube Q5 is connected to the photovoltaic input source 100, the first end of the switch tube Q5 is also connected to the cathode of the voltage stabilizing tube D4, the anode of the voltage stabilizing tube D4 is connected to the control end of the switch tube Q5, the resistor R9 is connected in parallel with the voltage stabilizing tube D4, and the second end of the switch tube Q5 is connected to the activation signal generation unit 413 and the switch module 42 respectively.

[0136] The first end of the switch tube Q6 is connected with the first control unit 412, and the first end of the switch tube Q6 is also connected with the control end of the switch tube Q6 through the resistor R10, the control end of the switch tube Q6 is also connected with the anode of the diode D5 through the resistor R11, the cathode of the diode D5 is grounded through the capacitor C1, and the second end of the switch tube Q6 is also connected with the switch module 42.

[0137] Specifically, when the photovoltaic input source 100 is connected to the auxiliary source activation indication circuit 400, the voltage stabilizing tube D2 receives the input voltage of the photovoltaic input source 100, and at this time, if the input voltage is greater than the voltage stabilizing value of the voltage stabilizing tube D2, the voltage stabilizing tube D2 is broken down, and the switch tube Q2 is also turned on. When the switch tube Q2 is turned on, the control end voltage of the switch tube Q4 is pulled down, so that the switch tube Q4 is turned on. When the switch tube Q4 is turned on, the switch tube Q5 is also turned on. At this time, the input voltage of the photovoltaic input source 100 charges the capacitor C1 through the switch tube Q5, the resistor R10, the resistor R11 and the diode D5, and the switch tube Q6 is also turned on at the same time. When the voltage at the end of the capacitor C1 gradually increases, the voltage drop between the resistor R10 is less than the on-voltage drop of the switch tube Q6, and the switch tube Q6 is turned off. Based on this, the turn-on and turn-off of the switch tube Q6 can generate a pulse signal lasting for a period of time, and the pulse signal is input to the switch module 42.

[0138] The voltage stabilizing tube D2 is selected based on the photovoltaic input source 100, and by setting a suitable voltage stabilizing value, the auxiliary source activation indication circuit 400 starts to work according to the input voltage of the photovoltaic input source 100 only when the input voltage of the photovoltaic input source 100 meets the requirements.

[0139] In another embodiment, the first control unit 412 further includes a resistor R6, and the resistor R6 is connected with the photovoltaic input source 100 and the control end of the switch tube Q4, respectively. The control end voltage of the switch tube Q4 is the input voltage of the photovoltaic input source 100 through the resistor R6, so as to avoid the mis-conduction of the switch tube Q4.

[0140] In some embodiments, as shown in Figure 5 The activation module 41 further includes an overvoltage detection unit 414.

[0141] The overvoltage detection unit 414 is connected with the photovoltaic input source 100 and the first control unit 412, respectively.

[0142] The overvoltage detection unit 414 is configured to detect the input voltage of the photovoltaic input source 100, and control the first control unit 412 to be turned off 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.

[0143] It can be 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 large, at this time, by controlling the first control unit 412 to be turned off, the output of the input voltage is stopped, so as to avoid damaging the subsequent devices.

[0144] In some embodiments, as shown in Figure 6 The overvoltage detection unit 414 includes a switch tube Q3, a resistor R5 and a voltage stabilizing tube D3.

[0145] The control end of the switch tube Q3 is connected with the cathode of the voltage stabilizing tube D3 through the resistor R5, the anode of the voltage stabilizing tube D3 is configured to be grounded, the first end of the switch tube Q3 is connected with the photovoltaic input source 100, and the second end of the switch tube Q3 is connected with the first control unit 412.

[0146] Specifically, when the input voltage of the photovoltaic input source 100 is greater than the third preset value, the voltage stabilizing tube D3 is broken down, and the switch tube Q3 is also in a conducting state. At this time, due to the action of the resistor R4, even if the switch tube Q2 is in a conducting state, the voltage of the control end of the switch tube Q4 is still pulled up, so that the switch tube Q4 is turned off, and the switch tube Q5 is also turned off, thereby stopping outputting the input voltage of the photovoltaic input source 100.

[0147] In yet another embodiment, as shown in Figure 5 The auxiliary source activation indication circuit 400 further includes a reset control module 45.

[0148] The reset control module 45 is connected with the activation signal generation unit 413 and the first control unit 412 respectively, and the reset control module 45 is further connected with the photovoltaic input source 100.

[0149] The reset control module 45 is configured 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 discharge the voltage stored in the activation signal generation unit 413; and

[0150] Stop discharging the voltage stored in the activation signal generation unit 413 when the first control unit 412 starts working, wherein the first preset value is greater than the second preset value.

[0151] Specifically, 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 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, so that the reset control module 45 starts working. When 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, at this time the reset control module 45 stops working. And because the voltage stored in the activation signal generation unit 413 has been discharged, the activation signal generation unit 413 receives and stores the input voltage again to output the activation signal. Based on this, when the photovoltaic input source 100 is accessed again, the activation signal can be accurately output, thereby improving the reliability of the auxiliary source activation indication circuit 400.

[0152] In yet another embodiment, as shown in Figure 5 The reset control module 45 includes an under-voltage reset unit 451 and a second control unit 452.

[0153] The under-voltage reset unit 451 is connected with the activation signal generation unit 413 and the second control unit 452 respectively, and the second control unit 452 is also connected with the first control unit 412. The second control unit 452 and the under-voltage reset unit 451 are also used for being connected with the photovoltaic input source 100.

[0154] The under-voltage reset unit 451 is used for starting working when the input voltage is less than the first preset value and greater than the second preset value, to discharge the voltage stored in the activation signal generation unit 413.

[0155] The second control unit 452 is used for controlling the under-voltage reset unit 451 to stop working after the first control unit 412 is turned on, so as to stop discharging the voltage stored in the activation signal generation unit 413.

[0156] When the input voltage of the photovoltaic input source 100 is less than the first preset value and greater than the 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 under-voltage reset unit 451, so that the under-voltage reset unit 451 starts working. When the under-voltage reset unit 451 starts working, the activation signal generation unit 413 discharges the stored voltage through the under-voltage 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, so that the input voltage is input to the activation signal generation unit 413. After the first control unit 412 starts working, the second control unit 452 also starts working, so that the under-voltage reset unit 451 stops working. Based on this, the activation signal generation unit 413 can accurately output the activation signal.

[0157] In another embodiment, as shown in Figure 6 The under-voltage reset unit 451 includes a switch tube Q8, a resistor R12 and a resistor R13; the second control unit 452 includes a switch tube Q1, a resistor R3 and a resistor R1.

[0158] The control end of the switch tube Q8 is connected with the second control unit 452 and the photovoltaic input source 100 through the resistor R13 respectively, the first end of the switch tube Q8 is connected with the capacitor C1 through the resistor R12, and the second end of the switch tube Q8 is grounded.

[0159] The control end of the switch tube Q1 is connected with the second end of the switch tube Q4 through the resistor R3, the first end of the switch tube Q1 is connected with the under-voltage reset unit 451, and the first end of the switch tube Q1 is also connected with the photovoltaic input source 100 through the resistor R1, and the second end of the switch tube Q1 is also grounded.

[0160] 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.

[0161] 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.

[0162] 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;

[0163] 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.

[0164] The embodiment of the present application provides an auxiliary source activation indication circuit, which comprises an activation module, a switch module and an indication module; the activation module is connected with the switch module and a photovoltaic input source respectively; the switch module is further connected with a power supply and the indication module respectively; the switch module and the indication module are further used for being connected with an auxiliary source. The activation module is used for detecting an input voltage of the photovoltaic input source, and outputting an activation signal when the input voltage is greater than a first preset value, so as to control the switch module to be turned on. After the switch module is turned on, the power supply voltage of the power supply is input to the auxiliary source, and if the power supply voltage is greater than an activation voltage, the auxiliary source can be activated, and the indication module outputs a first indication signal in response to a voltage signal output by the auxiliary source. Based on this, the power supply voltage is judged by the first preset value and the activation voltage, so that the situation of the auxiliary source being misstarted is avoided, and the service life of the energy storage system is improved. When the power supply voltage is less than the activation voltage, the indication module responds to the power supply voltage and outputs a second indication signal, so as to indicate that the auxiliary source is not activated. Based on this, the user can be prompted by the different indication signals whether the auxiliary source is activated, so that the situation of the auxiliary source being frequently started and stopped is avoided, and the stability of the energy storage system is improved.

[0165] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; under the idea of the present application, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the present application as described above, which are not provided in details for simplicity; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An auxiliary source activation indication circuit, characterized by The auxiliary source activation indication circuit comprises an activation module, a switch module and an indication module; The activation module is connected with the switch module and a photovoltaic input source respectively, the switch module is further connected with a power supply and the indication module respectively, and the switch module and the indication module are further connected with an auxiliary source; The activation module is used for detecting an input voltage of the photovoltaic input source and outputting an activation signal when the input voltage is greater than a first preset value; The switch module is used for receiving the activation signal and transmitting a power supply voltage of the power supply to the auxiliary source and the indication module based on the activation signal being turned on, wherein the auxiliary source is activated in response to the power supply voltage; The indication module is used for outputting a first indication signal in response to a voltage signal output by the auxiliary source when the auxiliary source is successfully activated; And outputting a second indication signal in response to the power supply voltage when the auxiliary source is not successfully activated; The indication module comprises a delay control unit, a locking unit and an indication unit; The delay control unit is connected with the indication unit, the locking unit and the switch module respectively, the indication unit is connected with the switch module and the auxiliary source, and the locking unit is connected with the auxiliary source; The locking unit is used for outputting a locking signal to the delay control unit when the voltage signal is received; The delay control unit is used for controlling the indication unit to output the first indication signal when the locking signal is received; controlling the indication unit to output the second indication signal in a target time in response to the power supply voltage when the locking signal is not received.

2. The auxiliary source activation indication circuit of claim 1, wherein, The indication module is further used for outputting the second indication signal in a target time in response to the power supply voltage, wherein the target time is greater than a time used for activating the auxiliary source to output the voltage signal.

3. The secondary activation indication circuit of claim 2, wherein, The indication unit comprises a resistor R14 and a light emitting diode D16; The resistor R14 is connected with the switch module and the auxiliary source respectively, the resistor R14 is further connected with an anode of the light emitting diode D16, and a cathode of the light emitting diode D16 is connected with the delay control unit.

4. The auxiliary source activation indication circuit of claim 2, wherein, The delay control unit comprises a switch tube Q9, a resistor R37, a resistor R15, a diode D17 and a capacitor C4; A control end of the switch tube Q9 is connected with an anode of the diode D17, the control end of the switch tube Q9 is further grounded through the capacitor C4, a first end of the switch tube Q9 is connected with the indication unit, a second end of the switch tube Q9 is used for grounding, a cathode of the diode D17 is connected with the switch module and the auxiliary source through the resistor R15, and the cathode of the diode D17 is further connected with the locking unit.

5. The secondary activation indication circuit of any one of claims 1 to 4, wherein, The auxiliary source activation indication circuit further comprises an energy storage module, the energy storage module is connected to a common end of the switch module and the indication module, and the energy storage module is used for charging in response to the power supply voltage when the switch module is turned on; And supplying power to the indication module based on stored electric energy when the switch module is turned off.

6. The secondary activation indication circuit of any of claims 1-4, wherein, The power supply is a photovoltaic input source or a battery, and the switch module comprises a detection control unit, a first switch unit and a second switch unit; The detection control unit is connected with the activation module, the first switch unit and the second switch unit respectively, the first switch unit is connected with the photovoltaic input source and the auxiliary source respectively, and the second switch unit is connected with the battery and the auxiliary source respectively; The detection control unit is used for detecting the battery voltage of the battery, and outputs a control signal to the second switch unit when the activation signal is received and the battery voltage is greater than a voltage threshold, so as to make the second switch unit conductive, thereby making the battery supply power to the auxiliary 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 switch unit, so as to make the first switch unit conductive, thereby making the photovoltaic input source supply power to the auxiliary source.

7. The secondary activation indicating circuit of claim 6, wherein, The detection control unit is also used for bypassing the activation signal transmitted to the first switch unit when the control signal is outputted, so as to control the first switch unit to be disconnected.

8. The secondary activation indicating circuit of claim 7, wherein, The detection control unit comprises a battery detection subunit, a control subunit and a bypass subunit; The control subunit is connected with the activation module, the battery detection subunit, the first switch unit and the bypass subunit respectively, the control subunit is also connected with the second switch unit, the bypass subunit is also connected with the activation module, and the battery detection subunit is also used for connecting the battery; The battery detection subunit is used for detecting the battery voltage of the battery, and outputs a driving signal when the battery voltage is greater than a voltage threshold; The control subunit is used for transmitting the activation signal to the first switch unit when the activation signal is received, so as to make the first switch unit conductive; And The control signal is outputted when the activation signal is received and the driving signal is received, so as to make the second switch unit conductive based on the control signal; The bypass subunit is used for receiving the control signal, and starts to work according to the control signal, so as to bypass the activation signal transmitted to the first switch unit, thereby controlling the first switch unit to be disconnected.

9. An energy storage system characterized by, The energy storage system comprises: A photovoltaic input source; A power supply; An auxiliary source; and The auxiliary source activation indication circuit according to any one of claims 1-8.

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