Energy storage power supply, energy storage power supply control method and computer equipment

Abstract

The present application relates to an energy storage power supply, a method for controlling an energy storage power supply, and a computer device. The energy storage power supply includes an AC output circuit, a controller, and a power switch circuit, with the controller being connected to the AC output circuit and the power switch circuit, respectively. The controller is configured to control the energy storage power supply to shut down via the power switch circuit when the energy storage power supply is in a no-load state, thereby stopping the AC output circuit. This energy storage power supply can reduce no-load losses.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to an energy storage power supply, a control method for an energy storage power supply, and a computer device. Background Art

[0002] With the rapid development of the economy and industry, energy storage power supplies have played an important role in power generation, grid operation, and user operations. In particular, thanks to technological advancements and process improvements in lithium batteries, the demand for convenient off-grid electricity in outdoor and home scenarios has been stimulated, and the portable energy storage market has seen explosive growth. However, due to the size and weight requirements of portable energy storage power supplies, the capacity of the built-in batteries in portable energy storage power supplies is strictly limited. In order to increase the standby time of energy storage power supplies, reduce battery power consumption, and solve the problem of rapid battery discharge caused by the power supply being turned on without load in scenarios such as users forgetting to turn off the energy storage power supply output or the load being suspended, how to reduce the no-load loss of energy storage power supplies has become an urgent problem that needs to be solved. Summary of the Invention

[0003] Based on this, it is necessary to provide an energy storage power supply, a control method for the energy storage power supply, and a computer device that reduce no-load losses in order to address the above technical problems.

[0004] In a first aspect, the present application provides an energy storage power supply, comprising: an AC output circuit, a controller, and a power switch circuit, wherein the controller is connected to the AC output circuit and the power switch circuit respectively;

[0005] The controller is used to control the energy storage power supply to shut down through the power switch circuit when the load state of the energy storage power supply is in the no-load state, so that the AC output circuit stops working.

[0006] In one embodiment, the energy storage power supply further includes a detection circuit, which is connected to the output end of the AC output circuit and the controller respectively;

[0007] A detection circuit, used for obtaining an output power signal of an output end of an AC output circuit;

[0008] The controller is used to determine the load state of the energy storage power supply according to the output power signal.

[0009] In one embodiment, the detection circuit includes a detection resistor, a sampling unit, an amplifying unit, a comparing unit, and a peak holding unit connected in sequence, the detection resistor is connected to the output end of the AC output circuit, and the peak holding unit is connected to the controller;

[0010] A sampling unit, used for obtaining the resistance voltage of the detection resistor;

[0011] an amplifying unit, configured to amplify the resistor voltage to obtain an amplified voltage;

[0012] A comparison unit, configured to obtain a peak signal of the amplified voltage within a preset range;

[0013] The peak holding unit is used to maintain the peak value in the peak signal to obtain an output power signal.

[0014] In one embodiment, the controller is further configured to obtain a signal amplitude of the output power signal, and if the signal amplitude is within a preset amplitude range, determine that the load state of the energy storage power supply is a no-load state.

[0015] In one embodiment, the energy storage power supply further includes a drive circuit; the drive circuit is connected to the controller and the power switch circuit respectively.

[0016] In one embodiment, the AC output circuit includes a first inverter module and a first transformer module connected to each other; the first inverter module is used to invert a first DC signal received at the input end of the AC output circuit into a first AC signal, and the first transformer module is used to boost the first AC signal to obtain an output power signal at the output end of the AC output circuit.

[0017] In one embodiment, the energy storage power supply further includes an energy storage battery, and the energy storage battery is connected to the input end of the AC output circuit.

[0018] In a second aspect, the present application further provides a method for controlling an energy storage power supply, which is applied to a controller in any of the above energy storage power supplies, the method comprising:

[0019] When the load state of the energy storage power supply is a no-load state, the energy storage power supply is controlled to shut down so that the AC output circuit in the energy storage power supply stops working.

[0020] In one embodiment, the method further comprises:

[0021] Obtaining an output power signal from an output terminal of an AC output circuit in an energy storage power supply;

[0022] The load state of the energy storage power supply is determined according to the output power signal.

[0023] In one embodiment, determining the load state of the energy storage power supply according to the output power signal includes:

[0024] Obtaining the signal amplitude of the output power signal;

[0025] If the signal amplitude is within the preset amplitude range, it is determined that the load state of the energy storage power supply is a no-load state.

[0026] In a third aspect, the present application further provides a computer device comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps in the above-mentioned method embodiments when executing the computer program.

[0027] In a fourth aspect, the present application further provides a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, the steps in the above-mentioned method embodiments are implemented.

[0028] In a fifth aspect, the present application also provides a computer program product, including a computer program, which implements the steps in the above-mentioned method embodiments when executed by a processor.

[0029] The above-mentioned energy storage power supply, energy storage power supply control method and computer equipment, the energy storage power supply includes an AC output circuit, a controller and a power switch circuit, wherein the controller is connected to the AC output circuit and the power switch circuit respectively, and the controller can control the energy storage power supply to shut down through the power switch circuit when the load state of the energy storage power supply is no-load state. Through this design, when the energy storage power supply is in a no-load state, the controller can control the energy storage power supply to automatically shut down through the power switch circuit, ensuring that the energy storage power supply can stop running in a timely manner under no-load conditions, thereby reducing the no-load loss of the energy storage power supply. This mechanism effectively solves the problem of rapid battery discharge caused by the power supply continuing to run at no load when the user forgets to turn off the energy storage power supply or when the load stops working. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following briefly introduces the drawings required for use in the embodiments of the present application or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 is a schematic diagram of an energy storage power supply in one embodiment;

[0032] Figure 2 is a schematic diagram of yet another energy storage power supply in one embodiment;

[0033] Figure 3 is a schematic diagram of a detection circuit in one embodiment;

[0034] Figure 4 is a schematic diagram of signals in one embodiment;

[0035] Figure 5 is a schematic diagram of yet another energy storage power supply in one embodiment;

[0036] Figure 6 is a schematic diagram of two AC output circuits in one embodiment;

[0037] Figure 7 is a schematic diagram of yet another energy storage power supply in one embodiment;

[0038] Figure 8 is a schematic diagram of yet another energy storage power supply in one embodiment;

[0039] Figure 9 is a schematic diagram of a flow chart of determining a load state in one embodiment;

[0040] Figure 10 FIG1 is a schematic diagram of another flow chart for determining a load state in an embodiment;

[0041] Figure 11 A schematic diagram of a process of controlling an energy storage power supply according to an embodiment;

[0042] Figure 12 FIG. 1 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0044] Figure 1 FIG. 1 is a schematic diagram of an energy storage power supply in one embodiment, as shown in FIG. Figure 1 As shown, the energy storage power supply 100 includes an AC output circuit 101, a controller 102 and a power switch circuit 103, and the controller 102 is connected to the AC output circuit 101 and the power switch circuit 103 respectively.

[0045] The AC output circuit 101 can convert the input current into the desired AC output. The input end of the AC output circuit 101 can be connected to an energy storage battery. The energy storage battery can be placed inside the energy storage power supply 100 or externally connected to the energy storage power supply 100, which is not limited in this embodiment.

[0046] The output end of the AC output circuit 101 can output the rated AC voltage of the grid to connect to the load outside the energy storage power supply 100. The load may include but is not limited to electrical appliances such as refrigerators, televisions, desk lamps, and laptops.

[0047] The AC output circuit 101 may include switching devices, including but not limited to insulated gate bipolar transistors (IGBTs) and metal-oxide-semiconductor field-effect transistors (MOSFETs).

[0048] The controller 102 includes but is not limited to a central processing unit (CPU), a digital signal processor (DSP), a field programmable gate array (FPGA) or other programmable logic devices.

[0049] The controller 102 can determine the load state of the energy storage power supply 100. The load state of the energy storage power supply 100 can be a no-load state, a light-load state, a full-load state, or an overload state. In some embodiments, the load state of the energy storage power supply 100 can also be divided into two categories: one category indicates that the load state of the energy storage power supply 100 is a no-load state, and the other category indicates that the load state of the energy storage power supply 100 is a non-no-load state.

[0050] Optionally, the controller 102 may obtain the load status of the energy storage power supply 100 through a detection device such as a sensor, or may obtain the output signal of the energy storage power supply 100 through a detection device and obtain the load status of the energy storage power supply 100 after performing spectrum analysis or other processing on the obtained output signal. This embodiment is not limited to this.

[0051] The power switch circuit 103 can control the power on or off of the energy storage power supply 100. Specifically, the power switch circuit 103 can control the power on or off of the energy storage power supply 100 by means of a switch element, a control signal, or controlling the energy storage battery 106. For example, the power switch circuit 103 can have a first state and a second state. When the power switch circuit 103 is in the first state, the energy storage power supply 100 is shut down. When the power switch circuit 103 is in the second state, the energy storage power supply 100 is turned on.

[0052] Furthermore, the controller 102 is configured to control the energy storage power supply 100 to shut down via the power switch circuit 103 when the energy storage power supply 100 is in a no-load state, thereby stopping the AC output circuit 101. In other words, if the controller 102 determines that the energy storage power supply 100 is in a no-load state, it can control the energy storage power supply 100 to shut down via the power switch circuit 103. After the energy storage power supply 100 is shut down, the AC output circuit 101 will also stop operating.

[0053] The energy storage power supply 100 includes an AC output circuit 101, a controller 102, and a power switch circuit 103. The controller 102 is connected to the AC output circuit 101 and the power switch circuit 103, respectively. Since the controller 102 can control the energy storage power supply 100 to shut down through the power switch circuit 103 when the load state of the energy storage power supply 100 is no-load, when the energy storage power supply is in the no-load state, the AC output circuit 101 in the energy storage power supply 100 will also stop working in a timely manner, and there will be no switching loss of the switching device during use, thereby reducing the no-load loss of the energy storage power supply. This can effectively solve the problem of rapid battery discharge caused by the user forgetting to turn off the energy storage power supply or the power supply continuing to run at no-load when the load stops working.

[0054] Figure 2 FIG. 1 is a schematic diagram of another energy storage power supply in an embodiment, as shown in FIG. Figure 2 As shown, in an exemplary embodiment, optionally, the energy storage power supply 100 further includes a detection circuit 104, which is connected to the output end of the AC output circuit 101 and the controller 102. In other words, the controller 102 is connected to the output end of the AC output circuit 101 through the detection circuit 104.

[0055] The detection circuit 104 is configured to obtain an output power signal from the output end of the AC output circuit 101. In other words, after obtaining the output power signal from the output end of the AC output circuit 101, the detection circuit 104 sends the output power signal to the controller 102, so that the controller 102 can obtain the output power signal.

[0056] The output power signal can represent the output power of the energy storage power supply 100. For example, the amplitude of the power output signal can be positively correlated with the output power of the energy storage power supply 100. For another example, the frequency of the power output signal can be positively correlated with the output power of the energy storage power supply 100. This embodiment is not limited to this.

[0057] Furthermore, the controller 102 can be used to determine the load state of the energy storage power supply 100 according to the output power signal.

[0058] Optionally, the controller 102 may determine the load state of the energy storage power supply 100 based on the signal parameters of the output power signal of the energy storage power supply 100 and a preset threshold value. The signal parameters include, but are not limited to, the amplitude or frequency of the output power signal. The preset threshold value may be set according to actual needs. For example, if the frequency of the output power signal is greater than the preset threshold value, the controller 102 determines that the load state of the energy storage power supply 100 is a non-no-load state. Conversely, if the frequency of the output power signal is not greater than the preset threshold value, the controller 102 determines that the load state of the energy storage power supply 100 is a no-load state.

[0059] In the above embodiment, the energy storage power supply 100 further includes a detection circuit 104, which is connected to the output end of the AC output circuit 101 and the controller 102, respectively. Since the detection circuit 104 is used to obtain the output power signal of the output end of the AC output circuit 101, and the controller 102 is used to determine the load state of the energy storage power supply 100 based on the output power signal, the load state of the energy storage power supply 100 can be efficiently determined through the detection circuit 104. Therefore, when the load state of the energy storage power supply 100 is a no-load state, the energy storage power supply 100 can be promptly controlled to shut down through the power switch circuit 103.

[0060] Currently, the AC current output by energy storage power supplies in the no-load state is very small, typically in the milliampere range. This makes it difficult for current transformers or Hall sensors to accurately measure this AC current. Furthermore, the AC current waveform is not a sinusoidal wave, but rather a pulse-like signal, which cannot meet the requirements of analog-to-digital conversion. Based on this, this embodiment also provides a detection circuit that facilitates obtaining an output power signal.

[0061] Figure 3 FIG. 1 is a schematic diagram of a detection circuit in one embodiment, Figure 3 As shown, in an exemplary embodiment, optionally, the detection circuit 104 includes a detection resistor 1041, a sampling unit 1042, an amplifying unit 1043, a comparing unit 1044, and a peak holding unit 1045 connected in sequence. V1 represents the output of the AC output circuit 101, the detection resistor 1041 is connected to the output terminal of the AC output circuit 101, and the peak holding unit 1045 is connected to the controller 102.

[0062] The sampling unit 1042 is configured to obtain the resistance voltage of the detection resistor 1041. The sampling unit 1042 may periodically obtain the resistance voltage across the detection resistor 1041.

[0063] In this embodiment, the AC current output by the energy storage power supply 100 in the no-load state is difficult to accurately measure and has a large error. Therefore, the sampling unit 1042 obtains the resistance voltage of the detection resistor 1041. The resistance voltage is the product of the resistance value of the detection resistor 1041 and the AC current of the energy storage power supply 100. In this way, the AC current signal output by the energy storage power supply 100 in the no-load state is converted into an AC voltage signal, which is conducive to accurately measuring the AC load current.

[0064] The amplifying unit 1043 is configured to amplify the resistor voltage to obtain an amplified voltage. The amplification factor of the resistor voltage can be set according to actual needs and is not limited in this embodiment.

[0065] The comparison unit 1044 is used to obtain a peak signal of the amplified voltage within a preset range. In this embodiment, under no-load conditions, the energy storage power supply 100 outputs a small-amplitude impulse-type pulse signal, and thus the amplified voltage is also an impulse-type pulse signal. Figure 4 This is a schematic diagram of a signal in an embodiment. The impact type pulse signal can refer to Figure 4 Figure (a) in .

[0066] Since the amplitude of the pulse signal changes periodically, but the effective value of the amplitude is a fixed value, it is necessary to obtain a peak signal of the amplified voltage within a preset range through the comparison unit 1044. The preset range can be set according to requirements.

[0067] Optionally, the comparison unit 1044 compares the amplified voltage with a preset value. If the amplitude of the voltage signal is less than the preset value, the amplitude is maintained unchanged. If the amplitude of the voltage signal is not less than the preset value, the comparison unit 1044 outputs 0. In some embodiments, if the amplitude of the voltage signal is greater than the preset value, the amplitude is maintained unchanged. If the amplitude of the voltage signal is not greater than the preset value, the comparison unit 1044 outputs 0. The preset voltage may be 0.

[0068] Exemplarily, the comparison unit 1044 outputs 0 when the amplitude of the amplified signal with both positive and negative values is greater than 0, and outputs the original value when it is less than 0. In this way, the comparison unit 1044 outputs a peak signal containing only negative values.

[0069] The peak holding unit 1045 is used to maintain the peak value in the peak signal and obtain the output power signal. In other words, the peak holding unit 1045 can capture and maintain the highest amplitude of the peak signal until the next new amplitude is obtained. The output power signal obtained by the peak holding unit 1045 can be referred to Figure 4 Figure (b) in .

[0070] In the above embodiment, since the detection circuit 104 includes a detection resistor 1041, a sampling unit 1042, an amplifying unit 1043, a comparing unit 1044 and a peak holding unit 1045 connected in sequence, the detection resistor 1041 is connected to the output end of the AC output circuit 101, and the peak holding unit 1045 is connected to the controller 102. Therefore, the resistance voltage of the detection resistor 1041 can be obtained through the sampling unit 1042, and the resistance voltage is amplified by the amplifying unit 1043 to obtain an amplified voltage, and then the peak signal in the amplified voltage within a preset range is obtained through the comparing unit 1044. Finally, the peak value in the peak signal is maintained by the peak holding unit 1045, and an output power signal that can be detected for a long time can be obtained.

[0071] Please continue to refer to Figure 3 In one embodiment, optionally, the amplification unit 1043 includes a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C2, a DC power supply V2, and a transistor Q1. The negative electrode of the sampling unit 1042 is grounded, and the positive electrode of the sampling unit 1042 is connected to the first end of the capacitor C2. The second end of the capacitor C2, the first end of the resistor R2, and the first end of the resistor R3 are all connected to the base of the transistor Q1. The second end of the resistor R2 is connected to the DC power supply V2, which is grounded. The second end of the resistor R3 is grounded. The first end of the resistor R4 is connected to the collector of the transistor Q3. The second end of the resistor R4 is connected to the DC power supply V2. The first end of the resistor R5 is connected to the emitter of the transistor Q3, and the second end of the resistor R5 is grounded.

[0072] Optionally, the comparison unit 1044 includes a resistor R6, a capacitor C3, a DC power supply V3, and a differential comparator U1A. The first end of the capacitor C3 is connected to the transistor Q1 and the resistor R4, respectively. The second end of the capacitor C3 is connected to the negative input terminal of the differential comparator U1A. The first end of the DC power supply V3 is connected to the positive power supply terminal of the differential comparator U1A, and the second end of the DC power supply V3 is grounded. The negative power supply terminal of the differential comparator U1A is grounded, and the output terminal of the differential comparator U1A is connected to the resistor R6.

[0073] Optionally, the peak hold unit 1045 includes a resistor R7, a resistor R8, a capacitor C4, a capacitor C5, a DC power supply V4, and an operational amplifier U2A. The negative input terminal of the operational amplifier U2A is connected to the resistor R6, the positive input terminal of the operational amplifier U2A is grounded, the resistor R7 is connected in parallel with the capacitor C4, the first end of the resistor R7 and the first end of the capacitor C4 are both connected to the negative input terminal of the operational amplifier U2A and the resistor R6, the second end of the resistor R7 and the second end of the capacitor C4 are both connected to the output terminal of the operational amplifier U2A, the output terminal of the operational amplifier U2A is further connected to the resistor R8, the first end of the capacitor C5 is connected to the resistor R8, and the second end of the capacitor C5 is grounded.

[0074] In one embodiment, please refer to Figure 3 Optionally, the output end of the AC output circuit 101 can be connected to a load through a diode D1, a diode D2, a capacitor C1 and a resistor R1.

[0075] In an exemplary embodiment, optionally, the controller 102 is further configured to obtain a signal amplitude of the output power signal, and if the signal amplitude is within a preset amplitude range, determine that the load state of the energy storage power supply 100 is a no-load state.

[0076] In this embodiment, the controller 102 may obtain the signal amplitude of the output power signal through a spectrum sensing device such as an oscilloscope. It should be noted that the signal amplitude corresponding to different time points may be different.

[0077] Furthermore, the controller 102 determines whether the load state of the energy storage power supply 100 is a no-load state by whether the signal amplitude of the output power signal falls within a preset amplitude range. The preset amplitude range can be set according to needs, for example, the preset amplitude range can be a range close to 0.

[0078] Furthermore, when the signal amplitude of the output power signal is within the preset amplitude range, the controller 102 determines that the load state of the energy storage power supply 100 is a no-load state. It is understood that when the signal amplitude of the output power signal is not within the preset amplitude range, the controller 102 may determine that the load state of the energy storage power supply 100 is a non-no-load state.

[0079] In the above embodiment, since the controller 102 is also used to obtain the signal amplitude of the output power signal, and when the signal amplitude is within the preset amplitude range, it can be determined that the load state of the energy storage power supply 100 is a no-load state. Therefore, it can be efficiently and accurately determined whether the load state is in a no-load state.

[0080] Figure 5 FIG. 1 is a schematic diagram of another energy storage power supply in an embodiment, as shown in FIG. Figure 5 As shown, in an exemplary embodiment, the energy storage power supply 100 optionally further includes a drive circuit 105. The drive circuit 105 is connected to the controller 102 and the power switch circuit 103 respectively. The drive circuit 105 includes, but is not limited to, a relay drive circuit 105, a transistor drive circuit 105, an optocoupler drive circuit 105, and the like, and this embodiment is not limiting.

[0081] The driving circuit 105 is used to control the energy storage power supply 100 to shut down through the power switch circuit 103 when the load state of the energy storage power supply 100 is in the no-load state, so as to stop the AC output circuit 101 from working.

[0082] In the above embodiment, since the energy storage power supply 100 further includes a drive circuit 105, and the drive circuit 105 is connected to the controller 102 and the power switch circuit 103 respectively, the drive circuit 105 can efficiently and reliably control the shutdown of the energy storage power supply 100 through the power switch circuit 103.

[0083] Figure 6 FIG. 1 is a schematic diagram of two AC output circuits in one embodiment, as shown in FIG. Figure 6 As shown in FIG. 1 (a), in an exemplary embodiment, optionally, the AC output circuit 101 includes a first inverter module 1011 and a first transformer module 1012 connected to each other.

[0084] The first inverter module 1011 is used to invert the first DC signal received at the input end of the AC output circuit 101 into a first AC signal, and the first transformer module 1012 is used to boost the first AC signal to obtain an output power signal at the output end of the AC output circuit 101. Figure 6 In Figure (a), the AC output circuit 101 inverts the DC input to AC, then boosts the voltage on the AC side for output. For example, the first inverter module 1011 may include, but is not limited to, an inverter, and the first transformer module 1012 may include, but is not limited to, a transformer.

[0085] In the above embodiment, since the AC output circuit 101 may include a first inverter module 1011 and a first transformer module 1012 connected to each other, the first inverter module 1011 is used to invert the first DC signal received at the input end of the AC output circuit 101 into a first AC signal, and the first transformer module 1012 is used to boost the first AC signal to obtain an output power signal at the output end of the AC output circuit 101. In this way, the AC output circuit 101 does not need to boost the voltage on the AC side, but instead boosts the voltage on the DC side. The required switching devices are fewer than the switching devices required for boosting the AC side, thereby reducing operating losses.

[0086] like Figure 6 As shown in Figure (b), in some embodiments, the AC output circuit 101 may also include a second transformer module 1013 and a second inverter module 1014, which are interconnected. The second transformer module 1013 is configured to boost the first DC signal received at the input of the AC output circuit 101 to generate a second DC signal, and the second inverter module 1014 is configured to invert the second DC signal into an output power signal at the output of the AC output circuit 101. In other words, the AC output circuit 101 may first invert the DC input to AC, then boost the AC voltage for output.

[0087] Exemplarily, the second transformer module 1013 includes but is not limited to a bidirectional buck-boost converter, and the second inverter module 1014 includes but is not limited to an inverter.

[0088] In some embodiments, the AC output circuit 101 may also include other devices. Figure 6 As shown in FIG. 5( b ), the AC output circuit 101 may further include an LLC resonant converter 1015 disposed between the input end of the AC output circuit 101 and the second voltage transformation module 1013 .

[0089] Figure 7 FIG. 1 is a schematic diagram of another energy storage power supply in an embodiment, as shown in FIG. Figure 7 As shown, in an exemplary embodiment, the energy storage power supply 100 optionally further includes an energy storage battery 106, which is connected to the input end of the AC output circuit 101. The energy storage battery 106 is used to provide the AC output circuit 101 with a first DC signal.

[0090] In the above embodiment, since the energy storage power supply 100 further includes the energy storage battery 106 , and the energy storage battery 106 is connected to the input end of the AC output circuit 101 , the energy storage battery 106 can provide an input source for the AC output circuit 101 .

[0091] Figure 8 FIG. 1 is a schematic diagram of another energy storage power supply in an embodiment, as shown in FIG. Figure 8 As shown, the energy storage power supply 100 includes an AC output circuit 101, a controller 102, a power switch circuit 103, a detection circuit 104, a drive circuit 105 and an energy storage battery 106. The energy storage battery 106 is connected to the input end of the AC output circuit 101, and the detection circuit 104 is connected to the output end of the AC output circuit 101 and the controller 102 respectively; the controller 102 is also connected to the power switch circuit 103; and the drive circuit 105 is connected to the controller 102 and the power switch circuit 103 respectively. Among them, the AC output circuit 101 can refer to Figure 6 , the detection circuit 104 can refer to Figure 3 , I will not go into details here.

[0092] Based on the same inventive concept, an embodiment of the present application further provides a method for controlling an energy storage power supply. In one embodiment, a method for controlling an energy storage power supply is further provided, and the method is described by taking the method applied to any of the controllers 102 described above as an example. The method comprises the following steps:

[0093] When the load state of the energy storage power supply is a no-load state, the energy storage power supply is controlled to shut down so that the AC output circuit in the energy storage power supply stops working.

[0094] In this embodiment, optionally, the controller may control the energy storage power supply to shut down through a power switch circuit, or may control the energy storage power supply to shut down by cutting off the power supply path of the energy storage battery, etc., but this embodiment is not limited thereto.

[0095] In the control method of the energy storage power supply provided above, since the energy storage power supply can be controlled to shut down when the load state of the energy storage power supply is in a no-load state, the AC output circuit in the energy storage power supply will also stop working in a timely manner in the no-load state, and there will be no switching loss of the switching device during use, thereby reducing the proportion of switching loss.

[0096] Figure 9 FIG. 1 is a flow chart of determining a load state in an embodiment. In an exemplary embodiment, as shown in FIG. Figure 9 As shown, the above-mentioned method for controlling the energy storage power supply includes S901 to S902.

[0097] S901: Acquire an output power signal from an output end of an AC output circuit in an energy storage power supply.

[0098] In this embodiment, the controller may optionally obtain the output power signal of the energy storage power supply through a detection device. Alternatively, the controller may obtain the output power signal of the energy storage power supply through the detection device and then perform spectrum analysis or other processing on the output signal to obtain the output power signal of the energy storage power supply. In some embodiments, the controller may also obtain the output power signal through a detection circuit.

[0099] S902: Determine the load state of the energy storage power supply according to the output power signal.

[0100] In this embodiment, the controller may optionally determine the load state of the energy storage power supply based on a signal parameter of the output power signal of the energy storage power supply and a preset threshold value, wherein the signal parameter includes but is not limited to the amplitude or frequency of the output power signal.

[0101] In the above embodiment, since the output power signal of the output end of the AC output circuit in the energy storage power supply can be obtained, the load state of the energy storage power supply can be determined efficiently and accurately based on the output power signal.

[0102] Figure 10 FIG. 1 is a flow chart of another method for determining a load state in an embodiment. In an exemplary embodiment, as shown in FIG. Figure 10 As shown, the above-mentioned S902 includes S1001 to S1002.

[0103] S1001: Acquire the signal amplitude of the output power signal.

[0104] S1002: If the signal amplitude is within a preset amplitude range, it is determined that the load state of the energy storage power supply is a no-load state.

[0105] In this embodiment, the controller can obtain the signal amplitude of the output power signal through a spectrum sensing device such as an oscilloscope, and determine whether the signal amplitude of the output power signal falls within a preset amplitude range, thereby determining whether the load state of the energy storage power supply is a no-load state. S1001 and S1002 can refer to the above embodiment and will not be repeated here.

[0106] In the above embodiment, since the signal amplitude of the output power signal can be obtained, when the signal amplitude is within the preset amplitude range, it can be accurately determined that the load state of the energy storage power supply is a no-load state.

[0107] In order to more clearly introduce the control method of the energy storage power supply of the present application, Figure 11 To explain, Figure 11 FIG. 1 is a process diagram of a method for controlling an energy storage power supply in one embodiment. Figure 11 As shown, the controller can execute the control method of the energy storage power supply according to the following process.

[0108] S1101, obtaining an output power signal of an output end of an AC output circuit in an energy storage power supply.

[0109] S1102: Acquire the signal amplitude of the output power signal.

[0110] S1103: If the signal amplitude is within the preset amplitude range, it is determined that the load state of the energy storage power supply is a no-load state.

[0111] S1104: When the load state of the energy storage power supply is a no-load state, the energy storage power supply is controlled to be shut down, so that the AC output circuit in the energy storage power supply stops working.

[0112] The processes of S1101 to S1104 can refer to the above embodiment and will not be described again here.

[0113] It should be understood that, although the various steps in the flowcharts involved in the various embodiments described above are displayed in sequence according to the instructions of the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least a portion of the steps in the flowcharts involved in the various embodiments described above can include multiple steps or multiple stages, and these steps or stages are not necessarily executed and completed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a portion of steps or stages in other steps.

[0114] Figure 12 This is an internal structure diagram of a computer device in an embodiment. In an exemplary embodiment, a computer device is provided. The computer device may be a server, and its internal structure diagram may be as shown in FIG. Figure 12 As shown. The computer device includes a processor, a memory, an input / output interface (Input / Output, abbreviated as I / O) and a communication interface. The processor, memory and input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and computer program in the non-volatile storage medium. The database of the computer device is used to store relevant data. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a control method for an energy storage power supply is implemented.

[0115] Those skilled in the art will understand that Figure 12 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0116] In one embodiment, a computer device is provided, including a memory and a processor. The memory stores a computer program, and the processor implements the steps in the above method embodiments when executing the computer program.

[0117] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments are implemented.

[0118] In one embodiment, a computer program product is provided, including a computer program, which implements the steps in the above method embodiments when executed by a processor.

[0119] Those skilled in the art will understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. In particular, any reference to memory, database, or other media used in the embodiments provided in this application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The databases involved in the various embodiments provided herein may include at least one of a relational database and a non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the various embodiments provided herein may be, but are not limited to, general-purpose processors, central processing units (CPUs), graphics processing units (GPUs), digital signal processors (DSPs), programmable logic devices (PLDs), quantum computing-based data processing logic devices, artificial intelligence (AI) processors, and the like.

[0120] The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0121] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. An energy storage power supply, characterized in that: The energy storage power supply includes an AC output circuit, a controller, and a power switch circuit, wherein the controller is connected to the AC output circuit and the power switch circuit respectively; the AC output circuit includes a first inverter module and a first transformer module connected to each other; the first inverter module is used to invert a first DC signal received at the input end of the AC output circuit into a first AC signal, and the first transformer module is used to boost the first AC signal to obtain an output power signal at the output end of the AC output circuit; The controller is configured to control the energy storage power supply to shut down through the power switch circuit when the load state of the energy storage power supply is in a no-load state, so as to stop the AC output circuit from working; The energy storage power supply further includes a detection circuit, which is connected to the output end of the AC output circuit and the controller respectively; The detection circuit is used to obtain the output power signal of the output end of the AC output circuit; The controller is configured to obtain a signal amplitude of the output power signal, and determine that the load state of the energy storage power supply is a no-load state if the signal amplitude is within a preset amplitude range; the preset amplitude range is determined based on zero; The detection circuit includes a detection resistor, a sampling unit, an amplifying unit, a comparing unit and a peak holding unit connected in sequence, the detection resistor is connected to the output end of the AC output circuit, and the peak holding unit is connected to the controller; The sampling unit is used to obtain the resistance voltage of the detection resistor; The amplifying unit is used to amplify the resistor voltage to obtain an amplified voltage; The comparison unit is configured to compare the amplitude of the amplified voltage with a preset value, and if the amplitude of the amplified voltage is less than the preset value, maintain the amplitude unchanged; if the amplitude of the amplified voltage is not less than the preset value, output zero; if the amplitude of the amplified voltage is greater than the preset value, maintain the amplitude unchanged; if the amplitude of the amplified voltage is not greater than the preset value, output zero, so as to obtain a peak signal of the amplified voltage whose amplitude is within a preset range; The peak holding unit is used to maintain the peak value in the peak signal to obtain the output power signal.

2. The energy storage power supply according to claim 1, characterized in that: The amplification unit includes a first resistor (R2), a second resistor (R3), a third resistor (R4), a fourth resistor (R5), a first capacitor (C2), a first DC power supply (V2) and a transistor (Q1); The negative electrode of the sampling unit is grounded, the positive electrode of the sampling unit is connected to the first end of the first capacitor (C2), the second end of the first capacitor (C2), the first end of the first resistor (R2), and the first end of the second resistor (R3) are all connected to the base of the transistor (Q1), the second end of the first resistor (R2) is connected to the first DC power supply (V2), the first DC power supply (V2) is grounded, the second end of the second resistor (R3) is grounded, the first end of the third resistor (R4) is connected to the collector of the transistor (Q3), the second end of the third resistor (R4) is connected to the first DC power supply (V2), the first end of the fourth resistor (R5) is connected to the emitter of the transistor (Q3), and the second end of the fourth resistor (R5) is grounded.

3. The energy storage power supply according to claim 2, characterized in that: The comparison unit includes a fifth resistor (R6), a second capacitor (C3), a second DC power supply (V3) and a differential comparator (U1A); The first end of the second capacitor (C3) is connected to the transistor (Q1) and the third resistor (R4) respectively, the second end of the second capacitor (C3) is connected to the negative input end of the differential comparator (U1A), the first end of the second DC power supply (V3) is connected to the positive power supply electrode of the differential comparator (U1A), and the second end of the second DC power supply (V3) is grounded; the negative power supply electrode of the differential comparator (U1A) is grounded, and the output end of the differential comparator (U1A) is connected to the fifth resistor (R6).

4. The energy storage power supply according to claim 3, characterized in that: The peak holding unit includes a sixth resistor (R7), a seventh resistor (R8), a third capacitor (C4), a fourth capacitor (C5), a third DC power supply (V4) and an operational amplifier (U2A); The negative input terminal of the operational amplifier (U2A) is connected to the fifth resistor (R6), the positive input terminal of the operational amplifier (U2A) is grounded, the sixth resistor (R7) is connected in parallel to the third capacitor (C4), the first end of the sixth resistor (R7) and the first end of the third capacitor (C4) are both connected to the negative input terminal of the operational amplifier (U2A) and the fifth resistor (R6), the second end of the sixth resistor (R7) and the second end of the third capacitor (C4) are both connected to the output terminal of the operational amplifier (U2A), the output terminal of the operational amplifier (U2A) is also connected to the seventh resistor (R8), the first end of the fourth capacitor (C5) is connected to the seventh resistor (R8), and the second end of the fourth capacitor (C5) is grounded.

5. The energy storage power supply according to any one of claims 1 to 4, characterized in that: The energy storage power supply further includes a drive circuit; the drive circuit is connected to the controller and the power switch circuit respectively.

6. The energy storage power supply according to any one of claims 1 to 4, characterized in that: The energy storage power supply further includes an energy storage battery, and the energy storage battery is connected to the input end of the AC output circuit.

7. A method for controlling an energy storage power supply, characterized in that: A controller applied to an energy storage power supply according to any one of claims 1 to 6, wherein the method comprises: When the load state of the energy storage power supply is a no-load state, controlling the energy storage power supply to shut down so that the AC output circuit in the energy storage power supply stops working; The method further comprises: Obtaining an output power signal from an output end of an AC output circuit in the energy storage power supply; Acquiring a signal amplitude of the output power signal; If the signal amplitude is within the preset amplitude range, it is determined that the load state of the energy storage power supply is a no-load state.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to claim 7 are implemented.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to claim 7 are implemented.

10. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to claim 7 are implemented.

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