Auxiliary source activation circuit

Abstract

The utility model relates to the technical field of energy storage power supplies, in particular to an auxiliary source activation circuit which comprises an auxiliary source activation module, a battery judgment module, an auxiliary source module, a battery charging module, a battery and a photovoltaic power supply. The auxiliary source activation module is used for outputting a first auxiliary source activation signal when the voltage of the photovoltaic power supply is greater than or equal to a photovoltaic voltage threshold; the auxiliary source module is used for outputting an auxiliary power supply when receiving the first auxiliary source activation signal; the battery charging module is used for charging the battery through the photovoltaic power supply when receiving the auxiliary power supply; and the battery judgment module is used for outputting a first battery signal when the voltage of the battery is greater than or equal to a battery voltage threshold value, so that the auxiliary source activation module outputs a second auxiliary source activation signal, and the auxiliary source module outputs an auxiliary power supply when receiving the second auxiliary source activation signal. On one hand, due to the arrangement of the battery judgment module, the battery can be prevented from being discharged during power shortage. And on the other hand, the auxiliary power supply can be activated or maintained to supply power when the battery voltage is normal.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage power supplies, and in particular to an auxiliary source activation circuit. Background Art

[0002] When a traditional energy storage system activates a photovoltaic source to charge a battery, it usually activates the BMS (BATTERY MANAGEMENT SYSTEM) battery first, and then the BMS battery activates the auxiliary power supply.

[0003] However, intermittent activation of the auxiliary power supply when the solar panel light is too weak and / or the battery voltage is too low may cause battery damage. Utility Model Content

[0004] The embodiment of the present application provides an auxiliary power source activation circuit, which can activate the auxiliary power source when the photovoltaic power source is sufficient and the battery voltage is sufficient.

[0005] An embodiment of the present application provides an auxiliary source activation circuit, including an auxiliary source activation module, a battery judgment module, an auxiliary source module, a battery charging module, a battery, and a photovoltaic power supply; the auxiliary source activation module is connected to the battery judgment module, the auxiliary source module, and the photovoltaic power supply, the battery judgment module is also connected to the battery, and the battery charging module is connected to the auxiliary source module, the photovoltaic power supply, and the battery; the auxiliary source activation module is used to output a first auxiliary source activation signal when the voltage of the photovoltaic power supply is greater than or equal to a photovoltaic voltage threshold; the auxiliary source module is used to output an auxiliary power supply upon receiving the first auxiliary source activation signal; the battery charging module is used to charge the battery through the photovoltaic power supply upon receiving the auxiliary power supply; the battery judgment module is used to output a first battery signal when the voltage of the battery is greater than or equal to the battery voltage threshold, so that the auxiliary source activation module outputs a second auxiliary source activation signal, and the auxiliary source module outputs the auxiliary power supply upon receiving the second auxiliary source activation signal.

[0006] In some embodiments, the auxiliary source activation module includes a photovoltaic input unit, a photovoltaic judgment unit, a first switch unit and a second switch unit; the photovoltaic power supply is connected to the auxiliary source module through the photovoltaic input unit, the first switch unit is connected to the second switch unit, the battery judgment module and the auxiliary source module, and the photovoltaic power supply is also connected to the second switch unit through the photovoltaic judgment unit; the photovoltaic input unit is used to output a first auxiliary source activation signal when the voltage of the photovoltaic power supply is greater than or equal to the photovoltaic voltage threshold; the photovoltaic judgment unit is used to control the second switch unit to be turned on when the voltage of the photovoltaic power supply is greater than or equal to the photovoltaic voltage threshold; the first switch unit is used to be turned on when the second switch unit is turned on and receives the first battery signal to output the second auxiliary source activation signal.

[0007] In some embodiments, the photovoltaic judgment unit includes a Zener diode D41, a diode D42, a resistor R243 and a resistor R244; the positive electrode of the Zener diode D41 is connected to the second switch unit, the negative electrode of the Zener diode D41 is connected to the negative electrode of the diode D42, the positive electrode of the diode D42 is connected to the first end of the resistor R243, and the second end of the resistor R243 is connected to the photovoltaic power source through the resistor R244.

[0008] In some embodiments, the first switch unit includes a switch tube Q22, a resistor R237 and a resistor R242; the first end of the switch tube Q22 is connected to the first end of the resistor R237 and the battery judgment module, the second end of the switch tube Q22 is connected to the auxiliary source module, the control end of the switch tube Q22 is connected to the second end of the resistor R237 and the first end of the resistor R242, and the second end of the resistor R242 is connected to the second switch unit.

[0009] In some embodiments, the second switch unit includes a switch tube Q23, a resistor R248 and a resistor R249; the control end of the switch tube Q23 is connected to the first end of the resistor R248 and the first end of the resistor R249, the second end of the resistor R248 is connected to the photovoltaic judgment unit, the second end of the switch tube Q23 and the second end of the resistor R249 are both grounded, and the third end of the switch tube Q23 is connected to the first switch unit.

[0010] In some embodiments, the battery judgment module includes an amplifier unit, a battery judgment unit, a third switch unit and a fourth switch unit; the battery is connected to the battery judgment unit through the amplifier unit, the battery judgment unit is connected to the third switch unit, the third switch unit is connected to the fourth switch unit, and the fourth switch unit is connected to the battery and the auxiliary source activation module; the amplifier unit is used to amplify the voltage of the battery to output a battery amplified voltage; the battery judgment unit is used to control the third switch unit to be turned on when the battery amplified voltage is greater than or equal to a first voltage threshold; the fourth switch unit is used to be turned on when the third switch unit is turned on to output the first battery signal.

[0011] In some embodiments, the amplification unit includes an amplifier U1A, a resistor R4, a resistor R6, a resistor R9, a resistor R12, a capacitor C1 and a capacitor C3; the in-phase input terminal of the amplifier U1A is connected to the positive electrode of the battery through the resistor R6, the in-phase input terminal of the amplifier U1A is connected to the negative electrode of the battery through the resistor R9, the first end of the resistor R4 and the first end of the capacitor C1 are both connected to the in-phase input terminal of the amplifier U1A, the second end of the resistor R4 and the second end of the capacitor C1 are both grounded, the first end of the resistor R12 and the first end of the capacitor C3 are both connected to the inverting input terminal of the amplifier U1A, the second end of the resistor R12 and the second end of the capacitor C3 are both connected to the output terminal of the amplifier U1A, and the output terminal of the amplifier U1A is also connected to the battery judgment unit.

[0012] In some embodiments, the battery judgment unit includes a comparator U2A, a resistor R3, a resistor R5, a resistor R8, a resistor R11 and a capacitor C2; the non-inverting input terminal of the comparator U2A is connected to the amplification unit through the resistor R8, the inverting input terminal of the comparator U2A is connected to the second end of the resistor R3 and the first end of the resistor R11, the first end of the resistor R3 is connected to the first power supply, the second end of the resistor R11 is grounded, the output terminal of the comparator U2A is connected to the second end of the resistor R5 and the first end of the capacitor C2, the first end of the resistor R5 is connected to the first power supply, the second end of the capacitor C2 is grounded, and the output terminal of the comparator U2A is also connected to the third switching unit.

[0013] In some embodiments, the third switch unit includes a switch tube Q2, a resistor R7 and a resistor R10; the control end of the switch tube Q2 is connected to the battery judgment unit through the resistor R7, the control end of the switch tube Q2 is also connected to the first end of the resistor R10, the second end of the resistor R10 and the second end of the switch tube Q2 are both grounded, and the third end of the switch tube Q2 is connected to the fourth switch unit.

[0014] In some embodiments, the fourth switch unit includes a switch tube Q1, a resistor R1 and a resistor R2; the first end of the switch tube Q1 is connected to the first end of the resistor R1 and the positive electrode of the battery, the second end of the resistor R1 is connected to the control end of the switch tube Q1, the second end of the switch tube Q1 is connected to the auxiliary source activation module, and the control end of the switch tube Q1 is connected to the third switch unit through the resistor R2.

[0015] The beneficial effects of the present application are as follows: the auxiliary source activation circuit provided by the embodiment of the present application includes an auxiliary source activation module, a battery judgment module, an auxiliary source module, a battery charging module, a battery, and a photovoltaic power supply. Among them, the auxiliary source activation module is connected to the battery judgment module, the auxiliary source module, and the photovoltaic power supply, the battery judgment module is also connected to the battery, and the battery charging module is connected to the auxiliary source module, the photovoltaic power supply, and the battery. When the photovoltaic power supply is input to the auxiliary source activation module, the auxiliary source activation module outputs a first auxiliary source activation signal to the auxiliary source module when the voltage of the photovoltaic power supply is greater than or equal to the photovoltaic voltage threshold to activate the auxiliary source module. After the auxiliary source module is activated, it outputs auxiliary power to the battery charging module. At this time, the battery charging module uses the electric energy of the photovoltaic power supply to charge the battery. When the voltage of the battery is greater than or equal to the battery voltage threshold, the battery judgment module controls the battery to output a first battery signal to the auxiliary source activation module, so that the auxiliary source activation module outputs a second auxiliary source activation signal, and the auxiliary source module outputs auxiliary power when receiving the second auxiliary source activation signal. On the one hand, due to the setting of the battery judgment module, the battery can be prevented from discharging when it is low on power. On the other hand, the auxiliary power supply can be activated or maintained for power supply when the battery voltage is normal. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] One or more embodiments are exemplarily described by corresponding drawings, which do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and the figures in the drawings do not constitute proportional limitations unless otherwise stated.

[0017] Figure 1 is a structural block diagram of an auxiliary source activation circuit provided in an embodiment of the present application;

[0018] Figure 2 is a structural block diagram of a battery determination module provided in an embodiment of the present application;

[0019] Figure 3 is a structural block diagram of an auxiliary source activation module provided in an embodiment of the present application;

[0020] Figure 4 1 is a schematic diagram of the circuit structure of a battery determination module provided in an embodiment of the present application;

[0021] Figure 5 It is a circuit structure diagram of an auxiliary source activation module provided in one embodiment of the present application. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and in detail in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0023] The technical features involved in the various embodiments of the present application described below do not conflict with each other and can be combined with each other.

[0024] When an element is referred to as being “connected to” another element, it can be directly connected to the other element, or one or more intervening elements may be present therebetween.

[0025] The terms "first", "second", etc. in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more.

[0026] See also Figure 1 , Figure 1 1 is a block diagram of the auxiliary source activation circuit 100 provided in one embodiment of the present application. Figure 1 As shown, an embodiment of the present application provides an auxiliary source activation circuit 100, including an auxiliary source activation module 30, a battery judgment module 20, an auxiliary source module 50, a battery charging module 60, a battery 10, and a photovoltaic power source 40.

[0027] Among them, the auxiliary source activation module 30 is connected to the battery judgment module 20, the auxiliary source module 50, and the photovoltaic power source 40. The battery judgment module 20 is also connected to the battery 10. The battery charging module 60 is connected to the auxiliary source module 50, the photovoltaic power source 40 and the battery 10.

[0028] Specifically, the auxiliary source activation module 30 outputs a first auxiliary source activation signal when the voltage of the photovoltaic power source 40 is greater than or equal to the photovoltaic voltage threshold. The auxiliary source module 50 outputs the auxiliary power when receiving the first auxiliary source activation signal. The battery charging module 60 charges the battery 10 through the photovoltaic power source 40 when receiving the auxiliary power. The battery judgment module 20 outputs a first battery signal when the voltage of the battery 10 is greater than or equal to the battery voltage threshold, so that the auxiliary source activation module 30 outputs a second auxiliary source activation signal, and the auxiliary source module 50 outputs the auxiliary power when receiving the second auxiliary source activation signal.

[0029] The photovoltaic voltage threshold is determined by the connection relationship between the components in the auxiliary source activation module 30. The battery voltage threshold is determined by the connection relationship between the components in the battery judgment module 20.

[0030] The auxiliary power module 50 is used to provide a stable low-voltage auxiliary power supply to the control circuit, the drive circuit, etc., so as to ensure stable and reliable operation of the battery charging module 60, the control circuit, the drive circuit, etc. The auxiliary power supply includes multiple power supplies, such as a +3.3V DC power supply, a +12V DC power supply, etc.

[0031] The first battery signal is a signal output by the battery 10 to the auxiliary source activation module 30 through the battery judgment module 20. The first auxiliary source activation signal and the second auxiliary source activation signal are both used to activate the auxiliary source module 50. When the first auxiliary source activation signal or the second auxiliary source activation signal is input to the auxiliary source module 50, the auxiliary source module 50 outputs auxiliary power. The structure of the auxiliary source module 50 can refer to existing or future technical solutions, and will not be repeated here.

[0032] When receiving the auxiliary power, the battery charging module 60 can charge the battery 10 through the photovoltaic power source 60. Generally, the battery charging module 60 is a buck-boost circuit, and the structure of the battery charging module 60 can refer to existing or future technical solutions, which will not be described in detail here.

[0033] In practical applications, when the photovoltaic power source 40 is input into the auxiliary source activation module 30, when the voltage of the photovoltaic power source 40 is greater than or equal to the photovoltaic voltage threshold, the auxiliary source activation module 30 outputs a first auxiliary source activation signal to activate the auxiliary source module 50, and the auxiliary source module 50 outputs the auxiliary power. Then, the battery charging module 60 uses the electric energy of the photovoltaic power source 40 to charge the battery 10. When the voltage of the battery 10 is greater than or equal to the battery voltage threshold, the switch tube in the battery judgment module 20 is turned on, and the battery judgment module 20 converts the electric energy of the battery 10 into a second battery signal. The auxiliary source activation module 30 can output a second auxiliary source activation signal to the auxiliary source module 50 according to the first battery signal to activate the auxiliary source module 50 or maintain the operation of the auxiliary source module 50. On the one hand, due to the setting of the battery judgment module, the battery can be prevented from discharging when it is low on power. On the other hand, the auxiliary power supply can be activated or maintained for power supply when the battery voltage is normal.

[0034] See also Figure 2 , Figure 2 It is a structural block diagram of a battery determination module 20 provided in an embodiment of the present application.

[0035] In some embodiments, the battery determination module 20 includes an amplification unit 21 , a battery determination unit 22 , a third switch unit 23 , and a fourth switch unit 24 .

[0036] Among them, the battery 10 is connected to the battery judgment unit 22 through the amplification unit 21, the battery judgment unit 22 is connected to the third switch unit 23, the third switch unit 23 is connected to the fourth switch unit 24, and the fourth switch unit 24 is connected to the battery 10 and the auxiliary source activation module 30.

[0037] Specifically, the amplifier unit 21 is used to amplify the voltage of the battery 10 to output the battery amplified voltage. The battery judgment unit 22 controls the third switch unit 23 to turn on when the battery amplified voltage is greater than or equal to the first voltage threshold. The fourth switch unit 24 is used to turn on when the third switch unit 23 is turned on to output the first battery signal.

[0038] The voltage of the battery 10 is the voltage between the positive electrode of the battery 10 and the negative electrode of the battery 10. The battery amplified voltage is determined by the voltage of the battery 10 and the connection relationship between the components in the amplification unit 21. The first voltage threshold is determined by the connection relationship between the components in the battery judgment unit 22.

[0039] In practical applications, when the amplifying unit 21 receives the voltage of the battery 10, the amplifying unit 21 amplifies the voltage of the battery 10 and outputs the battery amplified voltage. Next, the battery judgment unit 22 receives the battery amplified voltage, and controls the third switch unit 23 to be turned on when the battery amplified voltage is greater than or equal to the first voltage threshold, so that the fourth switch unit 24 is turned on, so that the battery 10 outputs the first battery signal to the auxiliary source activation module 30 through the fourth switch unit 24. When the battery amplified voltage is less than the first voltage threshold, the third switch unit 23 will not be turned on, so that the fourth switch unit 24 will not be turned on, and the battery 10 will not output the first battery signal through the fourth switch unit 24. In this embodiment, only when the voltage of the battery 10 is greater than or equal to the battery voltage threshold (the battery amplified voltage is greater than or equal to the first voltage threshold), the battery 10 can output the first battery signal through the fourth switch unit 24, which can prevent the loss of battery power when the voltage of the battery 10 is too low, prevent the battery from entering a power-deficient state, and reduce damage to the battery.

[0040] See also Figure 3 , Figure 3 It is a structural block diagram of the auxiliary source activation module 30 provided in one embodiment of the present application.

[0041] In some embodiments, the auxiliary power activation module 30 includes a photovoltaic input unit 31 , a photovoltaic determination unit 32 , a first switch unit 33 , and a second switch unit 34 .

[0042] Among them, the photovoltaic power supply 40 is connected to the auxiliary source module 50 through the photovoltaic input unit 31, the first switch unit 33 is connected to the second switch unit 34, the battery judgment module 20, and the auxiliary source module 50, and the photovoltaic power supply 40 is also connected to the second switch unit 34 through the photovoltaic judgment unit 32.

[0043] Specifically, the photovoltaic input unit 31 is used to output a first auxiliary source activation signal when the voltage of the photovoltaic power source 40 is greater than or equal to the photovoltaic voltage threshold; the photovoltaic judgment unit 32 is used to control the second switch unit 34 to be turned on when the voltage of the photovoltaic power source 40 is greater than or equal to the photovoltaic voltage threshold; the first switch unit 33 is used to be turned on when the second switch unit 34 is turned on and receives the first battery signal to output the second auxiliary source activation signal.

[0044] In some embodiments, the auxiliary source activation module 30 further includes a panel key unit 35. The panel key unit 35 is connected to the control end of the second switch unit 34. Specifically, the panel key unit 35 is used to control the second switch unit 34 to be turned on when receiving a key signal. The key signal is an external input to the panel key unit 35, which can be a signal input by an external controller or a signal input when a user presses an external key switch.

[0045] In actual application, when the voltage of the photovoltaic power source 40 is greater than or equal to the photovoltaic voltage threshold, the photovoltaic input unit 31 outputs the first auxiliary source activation signal to the auxiliary source module 50, so that the auxiliary source module 50 is activated. At the same time, when the voltage of the photovoltaic power source 40 is greater than or equal to the photovoltaic voltage threshold, the photovoltaic judgment unit 32 controls the second switch unit 34 to be turned on. At this time, if the second switch unit 34 is turned on and the first switch unit 33 receives the first battery signal, the first switch unit 33 is turned on, so that the first switch unit 33 uses the electric energy of the first battery signal to output the second auxiliary source activation signal to the auxiliary source module 50.

[0046] In this embodiment, if the voltage of the photovoltaic power source 40 is less than the photovoltaic voltage threshold, but the battery judgment module 20 outputs the first battery signal, the control panel button unit 35 can output a key signal to turn on the second switch unit 34, and then turn on the first switch unit 33, and also enable the first switch unit 33 to output a second auxiliary source activation signal.

[0047] This embodiment can prevent the auxiliary power module 50 from being activated when the voltage of the photovoltaic power source 40 is too low by setting the photovoltaic input unit 31 and the photovoltaic judgment unit 32, thereby avoiding the auxiliary power module 50 from being activated multiple times under weak light conditions, thereby improving the stability of the circuit.

[0048] See also Figure 4 , Figure 4 Schematic diagram of the circuit structure of the battery determination module 20 provided in one embodiment of the present application.

[0049] In some embodiments, the amplifying unit 21 includes an amplifier U1A, a resistor R4 , a resistor R6 , a resistor R9 , a resistor R12 , a capacitor C1 , and a capacitor C3 .

[0050] Specifically, the in-phase input terminal of the amplifier U1A is connected to the positive electrode of the battery 10 through the resistor R6, the inverting input terminal of the amplifier U1A is connected to the negative electrode of the battery 10 through the resistor R9, the first end of the resistor R4 and the first end of the capacitor C1 are both connected to the in-phase input terminal of the amplifier U1A, the second end of the resistor R4 and the second end of the capacitor C1 are both grounded, the first end of the resistor R12 and the first end of the capacitor C3 are both connected to the inverting input terminal of the amplifier U1A, the second end of the resistor R12 and the second end of the capacitor C3 are both connected to the output terminal of the amplifier U1A, and the output terminal of the amplifier U1A is also connected to the battery judgment unit 22. The fourth terminal of the comparator U1A is connected to the second power supply +12V, and the eleventh terminal of the comparator U1A is grounded. Among them, the second power supply +12V can be provided by the auxiliary source module 50 or provided by other external devices.

[0051] In some embodiments, the battery determination unit 22 includes a comparator U2A, a resistor R3, a resistor R5, a resistor R8, a resistor R11, and a capacitor C2.

[0052] Specifically, the in-phase input terminal of the comparator U2A is connected to the amplification unit 21 through the resistor R8, the inverting input terminal of the comparator U2A is connected to the second end of the resistor R3 and the first end of the resistor R11, the first end of the resistor R3 is connected to the first power supply +3.3V, the second end of the resistor R11 is grounded, the output terminal of the comparator U2A is connected to the second end of the resistor R5 and the first end of the capacitor C2, the first end of the resistor R5 is connected to the first power supply +3.3V, the second end of the capacitor C2 is grounded, the output terminal of the comparator U2A is also connected to the third switch unit 23, the eighth end of the comparator U2A is connected to the second power supply +12V, and the fourth end of the comparator U2A is grounded. Among them, the first power supply +3.3V and the second power supply +12V can be provided by the auxiliary source module 50 or other external devices.

[0053] In some embodiments, the third switch unit 23 includes a switch tube Q2 , a resistor R7 , and a resistor R10 .

[0054] Specifically, the control end of the switch tube Q2 is connected to the battery judgment unit 22 through the resistor R7, and the control end of the switch tube Q2 is also connected to the first end of the resistor R10. The second end of the resistor R10 and the second end of the switch tube Q2 are both grounded, and the third end of the switch tube Q2 is connected to the fourth switch unit 24.

[0055] Among them, in this embodiment, the switch tube Q2 is an NPN type transistor as an example. The base of the NPN type transistor is the control end of the switch tube Q2, the emitter of the NPN type transistor is the second end of the switch tube Q2, and the collector of the NPN type transistor is the third end of the switch tube Q2. In addition, the switch tube Q2 can be any controllable switch, such as an insulated gate bipolar transistor (IGBT) device, an integrated gate commutated thyristor (IGCT) device, a gate turn-off thyristor (GTO) device, a silicon controlled rectifier (SCR) device, a junction gate field effect transistor (JFET) device, a MOS controlled thyristor (MCT) device, etc.

[0056] In some embodiments, the fourth switch unit 24 includes a switch tube Q1 , a resistor R1 , and a resistor R2 .

[0057] Specifically, the first end of the switch tube Q1 is connected to the first end of the resistor R1 and the positive electrode of the battery 10, the second end of the resistor R1 is connected to the control end of the switch tube Q1, the second end of the switch tube Q1 is connected to the auxiliary source activation module 30, and the control end of the switch tube Q1 is connected to the third switch unit 23 through the resistor R2.

[0058] In this embodiment, the switch tube Q1 is a PMOS tube as an example. The gate of the PMOS tube is the control end of the switch tube Q1, the drain of the PMOS tube is the second end of the switch tube Q1, and the source of the PMOS tube is the first end of the switch tube Q1. In addition, the switch tube Q1 can be any controllable switch, such as an insulated gate bipolar transistor (IGBT) device, an integrated gate commutated thyristor (IGCT) device, a gate turn-off thyristor (GTO) device, a silicon controlled rectifier (SCR) device, a junction gate field effect transistor (JFET) device, a MOS controlled thyristor (MCT) device, etc.

[0059] The following Figure 4 The principle of the circuit structure shown is explained.

[0060] Figure 4 In the embodiment, the BAT+ terminal is directly connected to the positive electrode of the battery 10, and the BAT- terminal is connected to the negative electrode of the battery 10. The amplifier U1A amplifies the voltage of the battery 10 and outputs the battery amplified voltage through the output terminal of the comparator U1A. The in-phase input terminal of the comparator U2A receives the battery amplified voltage through the resistor R8. When the voltage of the in-phase input terminal of the comparator U2A is greater than or equal to the voltage of the inverting input terminal of the comparator U2A, the comparator U2A outputs a high level. At the same time, the switch tube Q2 is turned on, and the third terminal of the switch tube Q2 is at a low level. Then, the control terminal of the switch tube Q1 is at a low level, the switch tube Q1 is turned on, and the voltage of the positive electrode of the battery 10 outputs the first battery signal to the first switch unit 33 through the switch tube Q1.

[0061] See also Figure 5 , Figure 5 Schematic diagram of the circuit structure of the auxiliary source activation module 30 provided in one embodiment of the present application.

[0062] In some embodiments, the photovoltaic determination unit 32 includes a voltage regulator tube D41 , a diode D42 , a resistor R243 , and a resistor R244 .

[0063] Specifically, the positive electrode of the voltage regulator tube D41 is connected to the second switch unit 34, the negative electrode of the voltage regulator tube D41 is connected to the negative electrode of the diode D42, the positive electrode of the diode D42 is connected to the first end of the resistor R243, and the second end of the resistor R243 is connected to the photovoltaic power source 40 through the resistor R244.

[0064] The photovoltaic voltage threshold is determined by the voltage regulator D41, the resistor R243 and the resistor R244.

[0065] In some embodiments, the first switch unit 33 includes a switch tube Q22 , a resistor R237 , and a resistor R242 .

[0066] Specifically, the first end of the switch tube Q22 is connected to the first end of the resistor R237 and the battery judgment module 20, the second end of the switch tube Q22 is connected to the auxiliary source module 50, the control end of the switch tube Q22 is connected to the second end of the resistor R237 and the first end of the resistor R242, and the second end of the resistor R242 is connected to the second switch unit 34.

[0067] In this embodiment, the switch tube Q22 is a PMOS tube as an example. The gate of the PMOS tube is the control end of the switch tube Q22, the drain of the PMOS tube is the second end of the switch tube Q22, and the source of the PMOS tube is the first end of the switch tube Q22. In addition, the switch tube Q22 can be any controllable switch, such as an insulated gate bipolar transistor (IGBT) device, an integrated gate commutated thyristor (IGCT) device, a gate turn-off thyristor (GTO) device, a silicon controlled rectifier (SCR) device, a junction gate field effect transistor (JFET) device, etc.

[0068] In some embodiments, the second switch unit 34 includes a switch tube Q23 , a resistor R248 , and a resistor R249 .

[0069] Among them, the control end of the switch tube Q23 is connected to the first end of the resistor R248 and the first end of the resistor R249, the second end of the resistor R248 is connected to the photovoltaic judgment unit 32, the second end of the switch tube Q23 and the second end of the resistor R249 are both grounded, and the third end of the switch tube Q23 is connected to the first switch unit 33.

[0070] In this embodiment, the switch tube Q23 is an NPN transistor as an example. The base of the NPN transistor is the control end of the switch tube Q23, the emitter of the NPN transistor is the second end of the switch tube Q23, and the collector of the NPN transistor is the third end of the switch tube Q23. In addition, the switch tube Q23 can be any controllable switch, such as an insulated gate bipolar transistor (IGBT) device, an integrated gate commutated thyristor (IGCT) device, a gate turn-off thyristor (GTO) device, a silicon controlled rectifier (SCR) device, a junction gate field effect transistor (JFET) device, a MOS controlled thyristor (MCT) device, etc.

[0071] In some embodiments, the panel key unit 35 includes a diode D44 and a diode D21. The anode of the diode D44 is connected to the controller or an external device for receiving a first key signal. The anode of the diode D21 is connected to the controller or an external device for receiving a second key signal. The cathodes of the diode D44 and the diode D21 are both connected to the control end of the second switch unit 34. Specifically, the first key signal and the second key signal are both high level signals.

[0072] In some embodiments, the auxiliary source activation module 30 further includes an inductor L13. The battery determination module 20 is connected to the first switch unit 33 via the inductor L13. The inductor L13 is used to absorb high-frequency noise and interference signals in the first battery signal to make the signal more stable.

[0073] In some embodiments, the auxiliary source activation module 30 further includes a diode D38. The anode of the diode D30 is connected to the first switch unit 33, and the cathode of the diode D38 is connected to the auxiliary source module 50. The diode D38 is used to prevent the reverse voltage from damaging other components.

[0074] In some embodiments, the auxiliary source activation circuit 100 further includes a controller (not shown), which is connected to the battery 10, the photovoltaic power source 40, and the battery charging module 60. The controller can control the charging and discharging of the battery 10, the connection and disconnection of the photovoltaic power source 40, and the operation of the battery charging module 60. The specific structure of the controller can refer to existing or future technical solutions, which will not be described in detail here.

[0075] The following Figure 5 The principle of the circuit structure shown is explained.

[0076] Figure 5 In the embodiment, when the voltage of the photovoltaic power source 40 is greater than or equal to the photovoltaic voltage threshold, the photovoltaic power source 40 outputs the first auxiliary source activation signal to the auxiliary source module 50 through the photovoltaic input unit 31. At this time, the auxiliary source module 50 is activated, and the auxiliary source module 50 can output the auxiliary power. At the same time, when the voltage of the photovoltaic power source 40 is greater than or equal to the photovoltaic voltage threshold, the voltage regulator tube D41 is broken down, and then the voltage at the control end of the switch tube Q23 is high, and the switch tube Q23 is turned on. At this time, the control end of the switch tube Q22 is low. If the first end of the switch tube Q22 receives the first battery signal, the switch tube Q22 is turned on, and the third end of the switch tube Q22 can output the second auxiliary source activation signal.

[0077] When the voltage of the photovoltaic power source 40 is less than the photovoltaic voltage threshold, when the anode of the diode D44 receives the first key signal, and / or the anode of the diode D21 receives the second key signal, the voltage of the control end of the switch tube Q23 is high, the switch tube Q23 is turned on, and the control end of the switch tube Q22 is low. If at this time, the first battery signal is input to the first end of the switch tube Q22 through the inductor L13, the switch tube Q22 is turned on, so that the switch tube Q22 outputs the second auxiliary source activation signal to activate the auxiliary source module 50.

[0078] The auxiliary source activation circuit 100 provided in the embodiment of the present application includes an auxiliary source activation module 30, a battery judgment module 20, an auxiliary source module 50, a battery charging module 60, a battery 10, and a photovoltaic power source 40. Among them, the auxiliary source activation module 30 is connected to the battery judgment module 20, the auxiliary source module 50, and the photovoltaic power source 40, the battery judgment module 20 is also connected to the battery 10, and the battery charging module 60 is connected to the auxiliary source module 50, the photovoltaic power source 40 and the battery 10. When the photovoltaic power source 40 is input to the auxiliary source activation module 30, the auxiliary source activation module 30 outputs a first auxiliary source activation signal to the auxiliary source module 50 when the voltage of the photovoltaic power source 40 is greater than or equal to the photovoltaic voltage threshold to activate the auxiliary source module 50. After the auxiliary source module 50 is activated, it outputs auxiliary power to the battery charging module 60. At this time, the battery charging module 60 uses the electric energy of the photovoltaic power source to charge the battery 10. When the voltage of the battery 10 is greater than or equal to the battery voltage threshold, the battery judgment module 20 controls the battery 10 to output a first battery signal to the auxiliary source activation module 30, so that the auxiliary source activation module 30 outputs a second auxiliary source activation signal, and the auxiliary source module 50 outputs the auxiliary power supply upon receiving the second auxiliary source activation signal. On the one hand, due to the setting of the battery judgment module, the battery can be prevented from discharging when it is low in power. On the other hand, the auxiliary power supply can be activated or maintained for power supply when the battery voltage is normal. At the same time, it can avoid the auxiliary power supply being activated multiple times when the voltage of the photovoltaic power supply is low, thereby improving the stability of the circuit.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Based on the idea of ​​the present application, the technical features in the above embodiments or different embodiments may also be combined, and there are many other changes in different aspects of the present application as described above, which are not provided in detail for the sake of simplicity. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An auxiliary source activation circuit, characterized in that: It includes an auxiliary source activation module, a battery judgment module, an auxiliary source module, a battery charging module, a battery, and a photovoltaic power source; The auxiliary source activation module is connected to the battery judgment module, the auxiliary source module, and the photovoltaic power source. The battery judgment module is also connected to the battery. The battery charging module is connected to the auxiliary source module, the photovoltaic power source, and the battery. The auxiliary source activation module is used to output a first auxiliary source activation signal when the voltage of the photovoltaic power source is greater than or equal to a photovoltaic voltage threshold; The auxiliary source module is used to output auxiliary power when receiving the first auxiliary source activation signal; The battery charging module is used to charge the battery through the photovoltaic power source when receiving the auxiliary power source; The battery judgment module is used to output a first battery signal when the voltage of the battery is greater than or equal to the battery voltage threshold, so that the auxiliary source activation module outputs a second auxiliary source activation signal, and the auxiliary source module outputs the auxiliary power supply when receiving the second auxiliary source activation signal.

2. The auxiliary source activation circuit according to claim 1, characterized in that: The auxiliary source activation module includes a photovoltaic input unit, a photovoltaic judgment unit, a first switch unit and a second switch unit; The photovoltaic power source is connected to the auxiliary source module via the photovoltaic input unit, the first switch unit is connected to the second switch unit, the battery judgment module, and the auxiliary source module, and the photovoltaic power source is also connected to the second switch unit via the photovoltaic judgment unit; The photovoltaic input unit is used to output a first auxiliary source activation signal when the voltage of the photovoltaic power source is greater than or equal to the photovoltaic voltage threshold; The photovoltaic judgment unit is used to control the second switch unit to be turned on when the voltage of the photovoltaic power source is greater than or equal to the photovoltaic voltage threshold; The first switch unit is used to be turned on when the second switch unit is turned on and receives the first battery signal, so as to output the second auxiliary source activation signal.

3. The auxiliary source activation circuit according to claim 2, characterized in that: The photovoltaic judgment unit includes a voltage regulator tube D41, a diode D42, a resistor R243 and a resistor R244; The positive electrode of the voltage regulator tube D41 is connected to the second switch unit, the negative electrode of the voltage regulator tube D41 is connected to the negative electrode of the diode D42, the positive electrode of the diode D42 is connected to the first end of the resistor R243, and the second end of the resistor R243 is connected to the photovoltaic power source through the resistor R244.

4. The auxiliary source activation circuit according to claim 2, characterized in that: The first switch unit includes a switch tube Q22, a resistor R237 and a resistor R242; The first end of the switch tube Q22 is connected to the first end of the resistor R237 and the battery judgment module, the second end of the switch tube Q22 is connected to the auxiliary source module, the control end of the switch tube Q22 is connected to the second end of the resistor R237 and the first end of the resistor R242, and the second end of the resistor R242 is connected to the second switch unit.

5. The auxiliary source activation circuit according to claim 2, characterized in that: The second switch unit includes a switch tube Q23, a resistor R248 and a resistor R249; The control end of the switch tube Q23 is connected to the first end of the resistor R248 and the first end of the resistor R249, the second end of the resistor R248 is connected to the photovoltaic judgment unit, the second end of the switch tube Q23 and the second end of the resistor R249 are both grounded, and the third end of the switch tube Q23 is connected to the first switch unit.

6. The auxiliary source activation circuit according to claim 1, characterized in that: The battery judgment module includes an amplification unit, a battery judgment unit, a third switch unit and a fourth switch unit; The battery is connected to the battery judgment unit through the amplification unit, the battery judgment unit is connected to the third switch unit, the third switch unit is connected to the fourth switch unit, and the fourth switch unit is connected to the battery and the auxiliary source activation module; The amplifying unit is used to amplify the voltage of the battery to output a battery amplified voltage; The battery judgment unit is used to control the third switch unit to be turned on when the battery amplified voltage is greater than or equal to a first voltage threshold; The fourth switch unit is used to be turned on when the third switch unit is turned on, so as to output the first battery signal.

7. The auxiliary source activation circuit according to claim 6, characterized in that: The amplifying unit includes an amplifier U1A, a resistor R4, a resistor R6, a resistor R9, a resistor R12, a capacitor C1 and a capacitor C3; The non-inverting input terminal of the amplifier U1A is connected to the positive electrode of the battery through the resistor R6, the inverting input terminal of the amplifier U1A is connected to the negative electrode of the battery through the resistor R9, the first end of the resistor R4 and the first end of the capacitor C1 are both connected to the non-inverting input terminal of the amplifier U1A, the second end of the resistor R4 and the second end of the capacitor C1 are both grounded, the first end of the resistor R12 and the first end of the capacitor C3 are both connected to the inverting input terminal of the amplifier U1A, the second end of the resistor R12 and the second end of the capacitor C3 are both connected to the output terminal of the amplifier U1A, and the output terminal of the amplifier U1A is also connected to the battery judgment unit.

8. The auxiliary source activation circuit according to claim 6, characterized in that: The battery determination unit includes a comparator U2A, a resistor R3, a resistor R5, a resistor R8, a resistor R11 and a capacitor C2; The non-inverting input terminal of the comparator U2A is connected to the amplifying unit through the resistor R8, the inverting input terminal of the comparator U2A is connected to the second end of the resistor R3 and the first end of the resistor R11, the first end of the resistor R3 is connected to the first power supply, and the second end of the resistor R11 is grounded, the output terminal of the comparator U2A is connected to the second end of the resistor R5 and the first end of the capacitor C2, the first end of the resistor R5 is connected to the first power supply, and the second end of the capacitor C2 is grounded, and the output terminal of the comparator U2A is also connected to the third switching unit.

9. The auxiliary source activation circuit according to claim 6, characterized in that: The third switch unit includes a switch tube Q2, a resistor R7 and a resistor R10; The control end of the switch tube Q2 is connected to the battery judgment unit through the resistor R7, and the control end of the switch tube Q2 is also connected to the first end of the resistor R10, the second end of the resistor R10 and the second end of the switch tube Q2 are both grounded, and the third end of the switch tube Q2 is connected to the fourth switch unit.

10. The auxiliary source activation circuit according to claim 6, characterized in that: The fourth switch unit includes a switch tube Q1, a resistor R1 and a resistor R2; The first end of the switch tube Q1 is connected to the first end of the resistor R1 and the positive electrode of the battery, the second end of the resistor R1 is connected to the control end of the switch tube Q1, the second end of the switch tube Q1 is connected to the auxiliary source activation module, and the control end of the switch tube Q1 is connected to the third switch unit through the resistor R2.

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