Energy storage power supply and power system

Abstract

The utility model relates to an energy storage power supply and a power system. The energy storage power supply comprises an alternating current output circuit, the alternating current output circuit comprises a normal mode circuit and an energy-saving mode circuit, and a mode switching switch between the normal mode circuit and the energy-saving mode circuit is arranged in the energy storage power supply; wherein the switching loss ratio of the energy-saving mode circuit is smaller than that of the normal mode circuit. By adopting the energy storage power supply, the operation efficiency can be improved.

Description

Technical Field

[0001] This application relates to the field of power technology, and in particular to an energy storage power source and a power system. Background Technology

[0002] With the continuous development of new energy technologies, energy storage power supplies (also known as energy storage devices) are increasingly being used in daily life.

[0003] Currently, energy storage power supplies typically employ multi-stage DC-AC conversion to power connected electrical equipment. Since the switching devices in these multi-stage converters are always operational, and the corresponding switching losses are constant and independent of the load conditions of the connected equipment, current energy storage power supplies experience significant switching losses under no-load or light-load conditions, leading to decreased operating efficiency. Utility Model Content

[0004] Therefore, it is necessary to provide an energy storage power source and power system that can improve operating efficiency to address the aforementioned technical problems.

[0005] In a first aspect, this application provides an energy storage power supply, which includes an AC output circuit, comprising a normal mode circuit and an energy-saving mode circuit, and a mode switching switch between the normal mode circuit and the energy-saving mode circuit is provided in the energy storage power supply; wherein the switching loss ratio of the energy-saving mode circuit is less than that of the normal mode circuit.

[0006] In one embodiment, the energy-saving mode circuit includes a first inverter module and a first transformer module connected to each other; the normal mode circuit includes a second transformer module and a second inverter module connected to each other.

[0007] In one embodiment, the normal mode circuit further includes a resonant converter, and the second transformer module is connected to the resonant converter and the second inverter module, respectively.

[0008] In one embodiment, the energy storage power supply further includes a detection circuit, which is connected to the output terminal of the AC output circuit and the mode switching switch, respectively.

[0009] In one embodiment, the detection circuit includes a detection resistor, a sampling unit, an amplification unit, a comparison unit, and a peak hold unit connected in sequence. The detection resistor is connected to the output terminal of the AC output circuit, and the peak hold unit is connected to the mode switching switch.

[0010] In one embodiment, the resistance value of the detection resistor is less than or equal to a preset resistance threshold.

[0011] In one embodiment, the energy storage power supply further includes a drive circuit; the drive circuit is connected to the detection circuit, the AC output circuit, and the mode switching switch, respectively.

[0012] In one embodiment, the mode switching switch includes a first switch and a second switch, the first switch being connected to the input terminal of the AC output circuit and the second switch being connected to the output terminal of the AC output circuit.

[0013] In one embodiment, the energy storage power supply further includes an energy storage battery connected to the input of the AC output circuit.

[0014] Secondly, this application also provides an electric power system. This electric power system includes the energy storage power source described in any of the preceding claims.

[0015] The aforementioned energy storage power supply and power system include an AC output circuit, which comprises a normal mode circuit and an energy-saving mode circuit. Because the energy storage power supply has a mode switching switch between the normal and energy-saving modes, and the switching losses in the energy-saving mode circuit are less than those in the normal mode circuit, the switching between the two modes can be flexibly adjusted to improve the operating efficiency of the energy storage power supply. For example, under no-load or light-load conditions, the AC output circuit can be switched to the energy-saving mode circuit with lower switching losses using the mode switching switch, thereby reducing the switching losses under no-load or light-load conditions and improving operating efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of an energy storage power source in one embodiment;

[0017] Figure 2 This is a schematic diagram of an energy-saving mode circuit in one embodiment;

[0018] Figure 3 This is a schematic diagram of a normal mode circuit in one embodiment;

[0019] Figure 4 This is a schematic diagram of another normal mode circuit in one embodiment;

[0020] Figure 5 This is a schematic diagram of yet another energy storage power source in one embodiment;

[0021] Figure 6 This is a schematic diagram of a detection circuit in one embodiment;

[0022] Figure 7 This is a schematic diagram of signals in one embodiment;

[0023] Figure 8This is a schematic diagram of yet another energy storage power source in one embodiment;

[0024] Figure 9 This is a schematic diagram of yet another energy storage power source in one embodiment;

[0025] Figure 10 This is a schematic diagram of yet another energy storage power source in one embodiment;

[0026] Figure 11 This is a schematic diagram of yet another energy storage power source in one embodiment;

[0027] Figure 12 This is a schematic diagram of a power system in one embodiment.

[0028] Explanation of reference numerals in the attached figures:

[0029] 100-Energy storage power supply, 101-AC output circuit, 1011-Normal mode circuit, 1011a-Second transformer module, 1011b-Second inverter module, 1011c-Resonant converter, 1012-Energy saving mode circuit, 1012a-First inverter module, 1011b-First transformer module, 102-Mode switching switch, 1021-First switch, 1022-Second switch, 103-Detection circuit, 1031-Detection resistor, 1032-Sampling unit, 1033-Amplification unit, 1034-Comparison unit, 1035-Peak hold unit, 104-Drive circuit, 105-Energy storage battery, 200-Power system. Detailed Implementation

[0030] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0031] The serial numbers assigned to components in this document, such as "first" and "second," are used solely to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used solely for the convenience of describing this application and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0032] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0033] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0034] In the embodiments below, although terms such as “first” and “second” may be used to describe various components, these components are not necessarily limited to the terms above. The terms above are used only to distinguish one component from another. It will also be understood that expressions used in the singular form include plural expressions unless the singular form has a distinct meaning in the context. Furthermore, in the embodiments below, it will also be understood that the terms “comprising” and / or “having” as used herein indicate the presence of the stated feature or component, but do not exclude the presence or addition of one or more other features or components.

[0035] In the following embodiments, when a layer, region, or element is “connected,” it can be interpreted as the layer, region, or element being connected not only directly but also through other constituent elements placed therebetween. For example, when a layer, region, element, etc., is described as being connected or electrically connected, the layer, region, element, etc., can not only be directly connected or directly electrically connected, but can also be connected or electrically connected through another layer, region, element, etc., placed therebetween.

[0036] It is understandable that "at least one" refers to one or more, and "multiple" refers to two or more. "At least a part of an element" refers to part or all of an element.

[0037] It should also be understood that the terms “including / comprise” or “have” specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0039] Figure 1 This is a schematic diagram of an energy storage power source in one embodiment, such as... Figure 1 As shown, the energy storage power supply 100 includes an AC output circuit 101. The AC output circuit 101 converts the input current into the required AC output. The input terminal of the AC output circuit 101 can be connected to an energy storage battery, which can be placed inside the energy storage power supply 100 or connected externally; this embodiment does not impose any limitations.

[0040] The output terminal of the AC output circuit 101 can output the rated AC voltage of the power grid to connect to the load outside the energy storage power supply 100. The load may include, but is not limited to, electrical equipment such as refrigerators, televisions, table lamps, and laptops.

[0041] Furthermore, the AC output circuit 101 includes a normal mode circuit 1011 and an energy-saving mode circuit 1012. The switching loss ratio of the energy-saving mode circuit 1012 is less than that of the normal mode circuit 1011. The switching loss ratio refers to the proportion of the switching device's loss to the total loss. Switching devices include, but are not limited to, insulated-gate bipolar transistors (IGBTs) and metal-oxide-semiconductor field-effect transistors (MOSFETs). In other words, the proportion of the switching device's loss to the total loss in the energy-saving mode circuit 1012 is less than the proportion of the switching device's loss to the total loss in the normal mode circuit 1011.

[0042] In this embodiment, the switching loss ratio of the energy-saving mode circuit 1012 can be reduced by lowering the switching frequency of the switching device, using soft-switching technology, using switching devices with low loss characteristics, or improving the drive circuit. This embodiment is not limited to these methods.

[0043] Furthermore, the normal mode circuit 1011 and the energy-saving mode circuit 1012 do not work at the same time. In other words, when the AC output circuit 101 is working, only one of the normal mode circuit 1011 and the energy-saving mode circuit 1012 works at any given time.

[0044] Please continue to refer to this. Figure 1 The energy storage power supply 100 is provided with a mode switching switch 102 between a normal mode circuit 1011 and an energy-saving mode circuit 1012. The mode switching switch 102 enables the normal mode circuit 1011 and the energy-saving mode circuit 1012 to switch between working modes. The mode switching switch 102 is, but is not limited to, a mechanical switch, an electronic switch, a touch switch, etc., and this embodiment is not limited to this.

[0045] Optionally, the user can switch between the normal mode circuit 1011 and the energy-saving mode circuit 1012 using the mode switch 102. For example, the mode switch 102 can be a single-pole double-throw switch. Under normal operating conditions, the mode switch 102 is connected to the normal mode circuit 1011, and the normal mode circuit 1011 in the AC output circuit 101 operates. If the user observes that the load state of the energy storage power supply 100 is an unloaded or lightly loaded state, they can operate the mode switch 102 to connect to the energy-saving mode circuit 1012, thereby controlling the normal mode circuit 1011 to stop working and the energy-saving mode circuit 1012 to operate. In other words, the user can switch the AC output circuit 101 from operating in the normal mode circuit 1011 to operating in the energy-saving mode circuit 1012 using the mode switch 102.

[0046] In the above embodiments, the energy storage power supply 100 includes an AC output circuit 101, which includes a normal mode circuit 1011 and an energy-saving mode circuit 1012. Since the energy storage power supply 100 is equipped with a mode switching switch 102 between the normal mode circuit 1011 and the energy-saving mode circuit 1012, and the switching loss ratio of the energy-saving mode circuit 1012 is smaller than that of the normal mode circuit 1011, the normal mode circuit 1011 and the energy-saving mode circuit 1012 can be switched more flexibly to improve the operating efficiency of the energy storage power supply 100. For example, in no-load or light-load conditions, the AC output circuit 101 can be switched to the energy-saving mode circuit 1012 with a smaller switching loss ratio via the mode switching switch 102, thereby reducing the switching loss ratio in no-load or light-load conditions and improving operating efficiency.

[0047] Figure 2 This is a schematic diagram of an energy-saving mode circuit in one embodiment, such as... Figure 2 As shown, in an exemplary embodiment, optionally, the energy-saving mode circuit 1012 includes a first inverter module 1012a and a first transformer module 1012b connected to each other.

[0048] Specifically, the first inverter module 1012a is used to invert the first DC signal received at the input terminal of the AC output circuit 101 into a first AC signal, and the first transformer module 1012b is used to boost the first AC signal to obtain the output power signal at the output terminal of the AC output circuit 101. In other words, the energy-saving mode circuit 1012 inverts the DC input to the AC output circuit 101 into AC, and then boosts it on the AC side before outputting it.

[0049] For example, the first inverter module 1012a may be, but is not limited to, an inverter, and the first transformer module 1012b may be, but is not limited to, a transformer.

[0050] Figure 3 This is a schematic diagram of a normal mode circuit in one embodiment, such as... Figure 3 As shown, in an exemplary embodiment, optionally, the normal mode circuit 1011 includes a second transformer module 1011a and a second inverter module 1011b connected to each other.

[0051] The second transformer module 1011a is used to boost the first DC signal received at the input terminal of the AC output circuit 101 to obtain a second DC signal, and the second inverter module 1011b is used to invert the second DC signal to obtain the output power signal at the output terminal of the AC output circuit 101. That is to say, in normal mode, the circuit 1011 first inverts the DC input to the AC output circuit 101 into AC, and then boosts it on the AC side before outputting it.

[0052] For example, the second transformer module 1011a includes, but is not limited to, a bidirectional buck-boost converter, and the second inverter module 1011b includes, but is not limited to, an inverter.

[0053] In the above embodiments, the energy-saving mode circuit 1012 includes a first inverter module 1012a and a first transformer module 1012b connected to each other, and the normal mode circuit 1011 includes a second transformer module 1011a and a second inverter module 1011b connected to each other. Since the normal mode circuit 1011 boosts voltage on the AC side, and AC-side voltage boosting is usually achieved by switching devices on and off, it generates significant switching losses. These switching losses are independent of the load size. Therefore, under low load conditions, i.e., no-load or light-load conditions, the energy transmission efficiency of the energy storage power supply 100 is low, and its operating efficiency decreases. In contrast, the energy-saving mode circuit 1012 does not require AC-side voltage boosting but rather DC-side voltage boosting. It requires fewer switching devices than AC-side boosting, thus reducing operating losses and achieving energy-saving functionality under no-load or light-load conditions.

[0054] Figure 4 This is a schematic diagram of another normal mode circuit in one embodiment, such as... Figure 4 As shown, the normal mode circuit 1011 also includes a resonant converter 1011c, and the second transformer module 1011a is connected to the resonant converter 1011c and the second inverter module 1011b, respectively. For example, the resonant converter 1011c can be an LL resonant converter.

[0055] In the above embodiments, since the normal mode circuit 1011 also includes a resonant converter 1011c, and the second transformer module 1011a is connected to the resonant converter 1011c and the second inverter module 1011b respectively, the working efficiency of the normal mode circuit 1011 is improved.

[0056] Currently, the AC current output by energy storage power supplies under no-load or light-load conditions is relatively small, typically in the milliampere range. On the one hand, current transformers or Hall effect sensors struggle to accurately measure this AC current; on the other hand, the waveform of this AC current is not a sine wave, but rather a pulse-like signal, which cannot meet the requirements of analog-to-digital conversion. Therefore, the following embodiment also provides an energy storage power supply including a detection circuit.

[0057] Figure 5 This is a schematic diagram of another energy storage power source in one embodiment, such as... Figure 5 As shown, in an exemplary embodiment, optionally, the energy storage power supply 100 further includes a detection circuit 103, which is connected to the output terminal of the AC output circuit 101 and the mode switching switch 102, respectively.

[0058] The detection circuit 103 is used to acquire the output power signal at the output terminal of the AC output circuit 101. The output power signal characterizes 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, and the frequency of the power output signal can also be positively correlated with the output power of the energy storage power supply 100; however, this embodiment is not limited to these limitations.

[0059] Furthermore, the mode switching switch 102 can switch between the normal mode circuit 1011 and the energy-saving mode circuit 1012 based on the output power signal obtained by the detection circuit 103.

[0060] Optionally, the mode switch 102 can switch to the energy-saving mode circuit 1012 when the signal amplitude of the output power signal is within the preset amplitude range, and switch to the normal mode circuit 1011 when the signal amplitude of the output power signal is not within the preset amplitude range.

[0061] The preset amplitude range can be set according to requirements; for example, the preset amplitude range can be close to 0. When the signal amplitude of the output power signal is within the preset amplitude range, the load state of the energy storage power supply 100 is either no-load or light-load. When the signal amplitude of the output power signal is not within the preset amplitude range, the load state of the energy storage power supply 100 is either neither no-load nor light-load.

[0062] In the above embodiments, the energy storage power supply 100 also includes a detection circuit 103. Since the detection circuit 103 is connected to the output terminal of the AC output circuit 101 and the mode switching switch 102 respectively, the load condition of the energy storage power supply 100 can be detected by the detection circuit 103. This is beneficial for switching to the energy-saving mode circuit 1012 with a smaller switching loss when the load condition of the energy storage power supply 100 is light load or no load.

[0063] Figure 6 This is a schematic diagram of a detection circuit in one embodiment, such as... Figure 6 As shown, the detection circuit 103 includes a detection resistor 1031, a sampling unit 1032, an amplification unit 1033, a comparison unit 1034, and a peak hold unit 1035 connected in sequence. Wherein, V1 represents the output of the AC output circuit 101, the detection resistor 1031 is connected to the output terminal of the AC output circuit 101, and the peak hold unit 1035 is connected to the mode switching switch 102.

[0064] The sampling unit 1032 is used to acquire the resistance voltage across the detection resistor 1031. Specifically, the sampling unit 1032 can periodically acquire the resistance voltage across the detection resistor 1031.

[0065] In this embodiment, under no-load or light-load conditions, the load on the energy storage power supply 100 is relatively small, and the AC current output by the energy storage power supply 100 is difficult to measure accurately with large errors. Therefore, the sampling unit 1032 will acquire the resistance voltage of the detection resistor 1031. The resistance voltage is the product between the resistance value of the detection resistor 1031 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 under light-load or no-load conditions is converted into an AC voltage signal, which is beneficial for accurately measuring the AC load current.

[0066] The amplification unit 1033 is used to amplify the resistor voltage obtained by the sampling unit 1032 to obtain an amplified voltage. The amplification factor for the resistor voltage can be set according to actual needs, and this embodiment does not impose any limitations.

[0067] The comparison unit 1034 is used to obtain the peak signal of the amplified voltage within a preset range. In this embodiment, under light load conditions, the energy storage power supply 100 outputs a small-amplitude impulse pulse signal, and therefore the amplified voltage is also an impulse pulse signal. Figure 7 This is a schematic diagram of a signal in one embodiment; the impulse pulse signal can be referenced. Figure 7 Figure (a) in the middle.

[0068] Since the amplitude of the pulse signal changes periodically, but the effective value of the amplitude is fixed, the peak signal within a preset range of the amplified voltage needs to be obtained through the comparison unit 1034. The preset range can be set according to requirements.

[0069] Optionally, the comparison unit 1034 compares the amplified voltage with a preset value. If the amplitude of the voltage signal is less than the preset value, the amplitude remains unchanged; if the amplitude of the voltage signal is not less than the preset value, the output is 0. In some embodiments, the amplitude of the voltage signal may remain unchanged if it is greater than the preset value, and the output may be 0 if it is not greater than the preset value. The preset voltage may be 0.

[0070] For example, the comparison unit 1034 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 1034 will output a peak signal containing only negative values.

[0071] The peak hold unit 1035 is used to maintain the peak value of the peak signal to obtain the output power signal. In other words, the peak hold unit 1035 can capture and hold the highest amplitude of the peak signal until a new amplitude is acquired. The output power signal obtained by the peak hold unit 1035 can be referenced. Figure 7 Figure (b) in the middle.

[0072] In the above embodiment, since the detection circuit 103 includes a detection resistor 1031, a sampling unit 1032, an amplification unit 1033, a comparison unit 1034 and a peak hold unit 1035 connected in sequence, the detection resistor 1031 is connected to the output terminal of the AC output circuit 101, and the peak hold unit 1035 is connected to the mode switching switch 102, a long-term detectable output power signal can be obtained through the detection circuit 103.

[0073] Please continue to refer to this. Figure 6In one exemplary embodiment, optionally, the amplification unit 1033 includes resistors R2, R3, R4, and R5, capacitor C2, DC power supply V2, and transistor Q1. The negative terminal of the sampling unit 1032 is grounded, and the positive terminal of the sampling unit 1032 is connected to the first end of capacitor C2. The second end of capacitor C2, the first end of resistor R2, and the first end of resistor R3 are all connected to the base of transistor Q1. The second end of resistor R2 is connected to DC power supply V2, which is grounded. The second end of resistor R3 is grounded. The first end of resistor R4 is connected to the collector of transistor Q3, and the second end of resistor R4 is connected to DC power supply V2. The first end of resistor R5 is connected to the emitter of transistor Q3, and the second end of resistor R5 is grounded.

[0074] Optionally, the comparator unit 1034 includes a resistor R6, a capacitor C3, a DC power supply V3, and a differential comparator U1A. The first terminal of capacitor C3 is connected to both transistor Q1 and resistor R4, and the second terminal of capacitor C3 is connected to the negative input terminal of the differential comparator U1A. The first terminal of the DC power supply V3 is connected to the positive power supply terminal of the differential comparator U1A, and the second terminal 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 resistor R6.

[0075] Optionally, the peak hold unit 1035 includes resistors R7 and R8, capacitors C4 and C5, a DC power supply V4, and an operational amplifier U2A. The negative input terminal of operational amplifier U2A is connected to resistor R6, and the positive input terminal of operational amplifier U2A is grounded. Resistor R7 is connected in parallel with capacitor C4. The first end of resistor R7 and the first end of capacitor C4 are both connected to the negative input terminal of operational amplifier U2A and resistor R6. The second end of resistor R7 and the second end of capacitor C4 are both connected to the output terminal of operational amplifier U2A. The output terminal of operational amplifier U2A is also connected to resistor R8. The first end of capacitor C5 is connected to resistor R8, and the second end of capacitor C5 is grounded.

[0076] In one embodiment, the output terminal of the AC output circuit 101 is connected to the load through diode D1, diode D2, capacitor C1 and resistor R1.

[0077] In an exemplary embodiment, optionally, since the power of the detection resistor 1031 is proportional to the resistance value of the detection resistor 1031, if the resistance value of the detection resistor 1031 is large, it will increase the loss of the energy storage power supply 100 and reduce the energy conversion efficiency. Therefore, the resistance value of the detection resistor 1031 can be less than or equal to a preset resistance threshold, wherein the preset resistance threshold can be a value close to 0, for example, the preset resistance threshold can be 0.1 ohms.

[0078] Figure 8This is a schematic diagram of another energy storage power source in one embodiment, such as... Figure 8 As shown, in an exemplary embodiment, optionally, the mode switching switch 102 includes a first switch 1021 and a second switch 1022, the first switch 1021 being connected to the input terminal of the AC output circuit 101, and the second switch 1022 being connected to the output terminal of the AC output circuit 101.

[0079] In one embodiment, optionally, the input terminal of the AC output circuit 101 is used to receive DC, and the output terminal of the AC output circuit 101 is used to output AC. That is, the first switch 1021 is the DC side switch, and the second switch 1022 is the AC side switch.

[0080] Understandably, if both the first switch 1021 and the second switch 1022 are disconnected from the normal mode circuit 1011, and both are connected to the energy-saving mode circuit 1012, then the energy-saving mode circuit 1012 in the AC output circuit 101 will operate. If both the first switch 1021 and the second switch 1022 are connected to the normal mode circuit 1011, and both are disconnected from the energy-saving mode circuit 1012, then the normal mode circuit 1011 in the AC output circuit 101 will operate.

[0081] For example, if the load state is no-load or light-load, the user can control both the first switch 1021 and the second switch 1022 to disconnect from the normal mode circuit 1011 and connect both to the energy-saving mode circuit 1012. In this way, the energy-saving mode circuit 1022 in the AC output circuit 101 is connected, and the normal mode circuit 1011 is disconnected. If the load state is neither no-load nor light-load, the user can control both the first switch 1021 and the second switch 1022 to disconnect from the energy-saving mode circuit 1012 and connect both to the normal mode circuit 1011. In this way, the energy-saving mode circuit in the AC output circuit 101 is disconnected, and the normal mode circuit 1011 is connected.

[0082] The above example uses manual user control. In some embodiments, the first switch 1021 and the second switch 1022 can also automatically switch between normal mode circuit 1011 and energy-saving mode circuit 1012 based on the output power signal obtained by the detection module.

[0083] In the above embodiments, since the mode switching switch 102 includes a first switch 1021 and a second switch 1022, the first switch 1021 is connected to the input terminal of the AC output circuit 101, and the second switch 1022 is connected to the output terminal of the AC output circuit 101, the normal mode circuit 1011 and the energy-saving mode circuit 1012 can be switched efficiently and accurately through the first switch 1021 and the second switch 1022.

[0084] Figure 9 This is a schematic diagram of another energy storage power source in one embodiment, such as... Figure 9 As shown, in an exemplary embodiment, the energy storage power supply 100 may optionally include a drive circuit 104. The drive circuit 104 is connected to the detection circuit 103, the AC output circuit 101, and the mode switching switch 102, respectively.

[0085] The drive circuit 104 is used to control the AC output circuit 101, the first switch 1021 and the second switch 1022 according to the output power signal obtained by the detection circuit 103, so that when the load state is no-load or light-load, the normal mode circuit 1011 in the AC output circuit 101 stops working and the energy-saving mode circuit 1012 works; and when the load state is neither no-load nor light-load, the energy-saving mode circuit 1012 stops working and the normal mode circuit 1011 works.

[0086] In the above embodiments, the energy storage power supply 100 also includes a drive circuit 104. Since the drive circuit 104 is connected to the detection circuit 103, the AC output circuit 101 and the mode switching switch 102 respectively, the control efficiency is improved.

[0087] Figure 10 This is a schematic diagram of another energy storage power source in one embodiment, such as... Figure 10 As shown, in an exemplary embodiment, optionally, the energy storage power supply 100 further includes an energy storage battery 105, which is connected to the input terminal of the AC output circuit 101. The energy storage battery 105 is used to provide a first DC signal to the AC output circuit 101.

[0088] In the above embodiments, since the energy storage power supply 100 also includes an energy storage battery 105, which is connected to the input terminal of the AC output circuit 101, the energy storage battery 105 can provide an input source for the AC output circuit 101.

[0089] Figure 11 This is a schematic diagram of another energy storage power source in one embodiment, such as... Figure 11As shown, the energy storage power supply 100 includes an energy storage battery 105, a first switch 1021, an AC output circuit 101, a second switch 1022, a detection circuit 103, and a drive circuit 104.

[0090] The energy storage battery 105 is connected to the input terminal of the AC output circuit 101. The AC output circuit 101 includes a normal mode circuit 1011 and an energy-saving mode circuit 1012. The energy-saving mode circuit 1012 includes a first inverter module 1012a and a first transformer module 1012b. The normal mode circuit 1011 includes a resonant converter 1011c, a second transformer module 1011a, and a second inverter module 1011b.

[0091] The detection circuit 103 includes a detection resistor 1031, a sampling unit 1032, an amplification unit 1033, a comparison unit 1034, and a peak hold unit 1035 connected in sequence. The detection resistor 1031 is connected to the output terminal of the AC output circuit 101, and the peak hold unit 1035 is connected to the mode switching switch 102. The resistance value of the detection resistor 1031 is less than or equal to a preset resistance threshold.

[0092] The first switch 1021 is connected to the input terminal of the AC output circuit 101, and the second switch 1022 is connected to the output terminal of the AC output circuit 101. The drive circuit 104 is connected to the detection circuit 103, the AC output circuit 101, and the mode switching switch 102, respectively.

[0093] The principle of the energy storage power supply 100 can be referred to in the above embodiments, and will not be repeated here.

[0094] Figure 12 This is a schematic diagram of a power system in one embodiment, such as... Figure 12 As shown, in one embodiment, a power system 200 is provided, which includes the energy storage power source 100 of any of the above.

[0095] The technical features of the above embodiments can be combined in any way. For the sake of brevity, 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 specification.

[0096] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. An energy storage power source, characterized in that, The energy storage power supply (100) includes an AC output circuit (101), which includes a normal mode circuit (1011) and an energy-saving mode circuit (1012). The energy storage power supply (100) is provided with a mode switching switch (102) between the normal mode circuit (1011) and the energy-saving mode circuit (1012). The switching loss ratio of the energy-saving mode circuit (1012) is less than that of the normal mode circuit (1011).

2. The energy storage power supply according to claim 1, characterized in that, The energy-saving mode circuit (1012) includes a first inverter module (1012a) and a first transformer module (1012b) connected to each other; the normal mode circuit (1011) includes a second transformer module (1011a) and a second inverter module (1011b) connected to each other.

3. The energy storage power supply according to claim 2, characterized in that, The normal mode circuit (1011) further includes a resonant converter (1011c), and the second transformer module (1011a) is connected to the resonant converter (1011c) and the second inverter module (1011b) respectively.

4. The energy storage power supply according to claim 1, characterized in that, The energy storage power supply (100) also includes a detection circuit (103), which is connected to the output terminal of the AC output circuit (101) and the mode switching switch (102).

5. The energy storage power supply according to claim 4, characterized in that, The detection circuit (103) includes a detection resistor (1031), a sampling unit (1032), an amplification unit (1033), a comparison unit (1034), and a peak hold unit (1035) connected in sequence. The detection resistor (1031) is connected to the output terminal of the AC output circuit (101), and the peak hold unit (1035) is connected to the mode switching switch (102).

6. The energy storage power supply according to claim 5, characterized in that, The resistance value of the detection resistor (1031) is less than or equal to the preset resistance threshold.

7. The energy storage power supply according to claim 4, characterized in that, The energy storage power supply also includes a drive circuit; the drive circuit is connected to the detection circuit, the AC output circuit and the mode switching switch respectively.

8. The energy storage power source according to any one of claims 1-7, characterized in that, The mode switching switch (102) includes a first switch (1021) and a second switch (1022). The first switch (1021) is connected to the input terminal of the AC output circuit (101), and the second switch (1022) is connected to the output terminal of the AC output circuit (101).

9. The energy storage power supply according to any one of claims 1-6, characterized in that, The energy storage power supply (100) also includes an energy storage battery (105), which is connected to the input terminal of the AC output circuit (101).

10. An electric power system, characterized in that, The power system (200) includes an energy storage power source (100) as described in any one of claims 1-9.

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