An energy storage power supply, a parallel control device for energy storage power supplies and a control method thereof

Abstract

Embodiments of the present invention disclose an energy storage power supply, a parallel control device for the energy storage power supply, and a control method therefor. The energy storage power supply includes: a battery module; an inverter module electrically connected to the battery module; an output module; an output module electrically connected to the inverter module; a detection module electrically connected to the output module; a communication module communicatively connected to another energy storage power supply; a switching module electrically connected to the inverter module or the output module; and a processor module electrically connected to the detection module, the communication module, and the switching module, and configured to control the switching module to be electrically connected to the inverter module or the output module according to the power of the load detected by the detection module. The energy storage power supply, the parallel control device for the energy storage power supply, and the control method therefor provided by the embodiments of the present invention can achieve automatic switching between the parallel power state and the parallel capacity state of the energy storage power supply according to the detected power of the load during parallel operation, thereby effectively increasing the usage duration of the energy storage power supply.

Description

Technical Field

[0001] Embodiments of the present invention relate to energy storage power supply technology, and in particular, to an energy storage power supply, a parallel control device for energy storage power supplies, and a control method therefor. Background Art

[0002] Energy storage power supplies are becoming increasingly popular in the consumer field. However, various problems have been found, such as insufficient capacity or too small power of the energy storage power supply, which may not be able to drive load devices with relatively large power. Therefore, an energy storage power supply parallel device is needed to supply power to load devices that require high-power power supply to ensure the electrical energy required for the normal operation of the load devices.

[0003] Currently, for existing energy storage power supplies, during the parallel operation process, power doubling is usually not required when the load power is small. At the same time, in order to implement the parallel power function, when the corresponding synchronization circuit of the energy storage power supply works, it consumes additional power, affecting the usage duration of the energy storage power supply. Summary of the Invention

[0004] Embodiments of the present invention provide an energy storage power supply, a parallel control device for energy storage power supplies, and a control method therefor, so as to realize that when the energy storage power supplies are operating in parallel, they can automatically switch between the parallel power state and the parallel capacity state according to the detected power of the load, thereby effectively increasing the usage duration of the energy storage power supply.

[0005] In a first aspect, an embodiment of the present invention provides an energy storage power supply, including:

[0006] A battery module;

[0007] An inverter module, electrically connected to the battery module, for converting the direct current of the battery module into alternating current;

[0008] An output module; electrically connected to the inverter module, for outputting alternating current outward after turning on the inverter module;

[0009] A detection module, electrically connected to the output module, for detecting the power of a load electrically connected to the energy storage power supply through the output module;

[0010] A communication module, communicatively connected to another energy storage power supply;

[0011] A switching module, electrically connected to the inverter module or electrically connected to the output module;

[0012] A processor module, electrically connected to the detection module, the communication module, and the switching module, for controlling the switching module to be electrically connected to the inverter module or electrically connected to the output module according to the power of the load detected by the detection module.

[0013] Optionally, the switching module includes a first switch, a second switch, a third switch, a first branch, and a second branch. The first switch is electrically connected to the inverter module through the first branch, and the second switch and the third switch are electrically connected to the output module through the second branch.

[0014] Optionally, the processor module is configured to control the switching states of the first switch, the second switch, and the third switch according to the power of the load detected by the detection module.

[0015] Optionally, when both the first switch and the second switch are closed, the direct current of the two energy storage power supplies flows to the inverter module in parallel through the connection line.

[0016] Optionally, when both the first switch and the third switch are closed, the direct current of the energy storage power supply is converted into alternating current through the inverter module and then output through the connection line together with the alternating current of another energy storage power supply through the output module.

[0017] Optionally, the communication mode of the communication module is a wireless communication mode, and the wireless communication mode is wifi or bluetooth or zigbee.

[0018] In a second aspect, an embodiment of the present invention further provides an energy storage power supply parallel control device, including: at least two energy storage power supplies as described in the first aspect and a connection line connecting at least two energy storage power supplies, and the connection line connects the switching modules of at least two energy storage power supplies.

[0019] Optionally, the switching module includes a first switch, a second switch, a third switch, a first branch, and a second branch. The first switch is electrically connected to the inverter module through the first branch, and the second switch and the third switch are electrically connected to the output module through the second branch.

[0020] Optionally, when the power of the load is less than a preset power threshold, the processor module is configured to control the first switch and the second switch to close, and the parallel state of the energy storage power supplies is the parallel capacity state;

[0021] When the power of the load is greater than the preset power threshold, the processor module is configured to control the second switch and the third switch to close, and the parallel state of the energy storage power supplies is the parallel power state. The processor module is further configured to adjust the voltage and phase of the output of the inverter module according to the signal of the communication module.

[0022] Optionally, the preset power threshold is 80% of the maximum output power of the energy storage power supply.

[0023] In a third aspect, an embodiment of the present invention further provides an energy storage power supply parallel control method, which is executed by the processor module of the energy storage power supply described in the first aspect. The method includes:

[0024] Obtaining the power of the load detected by the detection module;

[0025] When the power of the load is greater than the preset power threshold, the communication module is awakened, and the energy storage power supply is controlled to enter the parallel power state through the control switching module;

[0026] When the power of the load is less than the preset power threshold, the communication module is controlled to close, and the energy storage power supply is controlled to enter the parallel capacity state through the control switching module.

[0027] The energy storage power supply, the energy storage power supply parallel control device and the control method provided by the embodiments of the present invention. The energy storage power supply includes a battery module, an inverter module, an output module, a detection module, a communication module, a switching module and a processor module. The inverter module is electrically connected to the battery module, the output module is electrically connected to the inverter module, and the detection module is electrically connected to the output module. The power of the load electrically connected to the energy storage power supply is detected through the output module. The communication module is communicatively connected to another energy storage power supply. The switching module is electrically connected to the inverter module or the output module. The processor module is electrically connected to the detection module, the communication module and the switching module, and controls the switching module to be electrically connected to the inverter module or the output module according to the power of the load detected by the detection module. Compared with the existing energy storage power supply, the energy storage power supply, the energy storage power supply parallel control device and the control method provided by the embodiments of the present invention control the switching module to be electrically connected to the inverter module or the output module through the processor module. For example, when the energy storage power supplies are in parallel power supply, if the power of the load is less than the output power of the energy storage power supply, the parallel capacity state of the energy storage power supply can be realized through the control of the processor, which can meet the electrical energy demand of the load and avoid wasting the electrical energy stored in the energy storage power supply; if the power of the load is greater than the output power of the energy storage power supply, the parallel power state of the energy storage power supply can be realized through the control of the processor, providing electrical energy with doubled power for the load, so that the electrical energy supplied to the load meets the load demand, that is, the energy storage power supply can automatically switch between the parallel power state and the parallel capacity state according to the detected power of the load when working in parallel, thereby effectively increasing the usage duration of the energy storage power supply. Description of the Drawings

[0028] Figure 1 is a structural block diagram of an energy storage power supply provided by Embodiment 1 of the present invention;

[0029] Figure 2 is another structural block diagram of an energy storage power supply provided by Embodiment 1 of the present invention;

[0030] Figure 3 is a structural block diagram of an energy storage power supply parallel control device provided by Embodiment 2 of the present invention;

[0031] Figure 4 is another structural block diagram of an energy storage power supply parallel control device provided by Embodiment 2 of the present invention;

[0032] Figure 5It is a flowchart of a control method for a parallel control device of an energy storage power supply provided in Embodiment 3 of the present invention. Detailed implementation manners

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. Additionally, it should be noted that for the convenience of description, only the parts related to the present invention are shown in the drawings, rather than all the structures.

[0034] Embodiment 1

[0035] Figure 1 It is a structural block diagram of an energy storage power supply provided in Embodiment 1 of the present invention. This embodiment is applicable to situations such as powering a power supply device. The energy storage power supply includes: a battery module 10, an inverter module 20, an output module 30, a detection module 40, a communication module 50, a switching module 60, and a processor module 70.

[0036] Among them, the inverter module 20 is electrically connected to the battery module 10 and is used to convert the direct current of the battery module 10 into alternating current; the output module 30 is electrically connected to the inverter module 20 and is used to output alternating current after conducting the inverter module 20; the detection module 40 is electrically connected to the output module 30 and is used to detect the power of the load electrically connected to the energy storage power supply through the output module 30; the communication module 50 is communicatively connected to another energy storage power supply; the switching module 60 is electrically connected to the inverter module 20 or electrically connected to the output module 30; the processor module 70 is electrically connected to the detection module 40, the communication module 50, and the switching module 60, and is used to control the switching module 60 to be electrically connected to the inverter module 20 or electrically connected to the output module 30 according to the power of the load detected by the detection module 40.

[0037] Specifically, when the energy storage power supply powers the load, taking the case of two energy storage power supplies in parallel to power the load as an example, the load is electrically connected to the output module 30 of one of the energy storage power supplies. The switching modules 60 of the two energy storage power supplies are electrically connected through a connecting wire. The detection module 40 of the energy storage power supply electrically connected to the load detects the power of the load. When the power of the load is less than the preset power threshold, the processor module 70 of the energy storage power supply electrically connected to the load controls the switching module 60 to be electrically connected to the inverter module 20, and the processor module 70 of the other energy storage power supply controls the switching module 60 to be electrically connected to the output module 30, so that the direct current of the battery module 10 is transmitted to the switching module 60 of the energy storage power supply electrically connected to the load through the switching module 60. Thus, the direct currents of the two energy storage power supplies are both inverted into alternating current by the inverter module 20 electrically connected to the switching module 60, and are transmitted to the load through the output module 30 electrically connected to the load to power the load. At this time, the parallel state of the two energy storage power supplies is the parallel capacity state, that is, when the load power is small, the energy storage power supply can supply power to the load in parallel capacity, which can meet the load's electrical energy demand and avoid wasting the electrical energy stored in the energy storage power supply. Among them, the preset power threshold can be 80% of the highest output power of the energy storage power supply. When the power of the load is greater than the preset power threshold, the processor module 70 of the energy storage power supply electrically connected to the load controls the switching module 60 to be electrically connected to the inverter module 20 and controls the loop with a connecting wire between the switching module 60 and the output module 30 to be connected. The processor module 70 of the other energy storage power supply controls the switching module 60 to be electrically connected to the inverter module 20 and controls the loop with a connecting wire between the switching module 60 and the output module 30 to be connected, so that the direct current of the battery module 10 is inverted into alternating current by the inverter module 20, and the alternating current is transmitted to the switching module 60 of the energy storage power supply electrically connected to the load through the connecting wire. Thus, the alternating current is transmitted to the output module 30 through the switching module 60. At the same time, the direct current of the battery module 10 of the energy storage power supply electrically connected to the load is transmitted to the inverter module 20 through the switching module 60, and the inverter module 20 inverts the direct current. The communication module 50 of the energy storage power supply electrically connected to the load communicates with the communication module 50 of the other energy storage power supply and receives the communication signal sent by the communication module 50 of the other energy storage power supply. The communication signal includes the voltage and phase signals of the alternating current of the other energy storage power supply. The processor module 70 of the energy storage power supply electrically connected to the load controls the voltage and phase of the alternating current output by the inverter module 20 according to the communication signal received by the communication module 50, so that the voltages and phases of the alternating currents of the two energy storage power supplies are the same. The alternating currents of the two energy storage power supplies are both transmitted to the load through the output module 30 electrically connected to the load to power the load. At this time, the parallel state of the two energy storage power supplies is the parallel power state, so as to provide the load with electrical energy with doubled power to make the electrical energy supplied to the load meet the load demand. That is, when the energy storage power supplies are operating in parallel, they can automatically switch between the parallel power state and the parallel capacity state according to the detected power of the load, thereby effectively increasing the usage duration of the energy storage power supply.

[0038] The energy storage power supply provided in this embodiment includes a battery module, an inverter module, an output module, a detection module, a communication module, a switching module, and a processor module. The inverter module is electrically connected to the battery module, the output module is electrically connected to the inverter module, and the detection module is electrically connected to the output module. The power of the load electrically connected to the energy storage power supply is detected through the output module. The communication module is communicatively connected to another energy storage power supply. The switching module is electrically connected to the inverter module or the output module. The processor module is electrically connected to the detection module, the communication module, and the switching module, and controls the switching module to be electrically connected to the inverter module or the output module according to the power of the load detected by the detection module. Compared with the existing energy storage power supply, the energy storage power supply provided in this embodiment controls the switching module to be electrically connected to the inverter module or the output module through the processor module. For example, when the energy storage power supplies are in parallel power supply, if the power of the load is less than the output power of the energy storage power supply, the parallel capacity state of the energy storage power supply can be realized through the control of the processor, which can avoid wasting the electric energy stored in the energy storage power supply while meeting the electric energy demand of the load; if the power of the load is greater than the output power of the energy storage power supply, the parallel power state of the energy storage power supply can be realized through the control of the processor, providing the load with electric energy with doubled power, so that the electric energy supplied to the load meets the load demand, that is, when the energy storage power supplies are in parallel operation, the parallel power state and the parallel capacity state can be automatically switched according to the detected power of the load, thus effectively increasing the usage duration of the energy storage power supply.

[0039] Figure 2 is a structural block diagram of another energy storage power supply provided in Embodiment 1 of the present invention. Refer to Figure 2 , optionally, the switching module 60 includes a first switch 61, a second switch 62, a third switch 63, a first branch L1, and a second branch L2. The first switch 61 is electrically connected to the inverter module 20 through the first branch L1, and the second switch 62 and the third switch 63 are electrically connected to the output module 30 through the second branch L2.

[0040] Among them, when the first switch 61 is closed, the battery module 10 is electrically connected to the inverter module 20 through the switching module 60. When the first switch 61 is closed, the direct current of the battery module 10 can be transmitted to the inverter module 20 through the switching module 60. When the second switch 62 and the third switch 63 are closed, the direct current of the battery module 10 can be transmitted to the output module 30 through the switching module 60.

[0041] Optionally, the processor module 70 is configured to control the switch states of the first switch 61, the second switch 62, and the third switch 63 according to the power of the load detected by the detection module 40.

[0042] Among them, the processor module 70 controls the closing or opening of the first switch 61, the second switch 62, and the third switch 63 according to the power of the load detected by the detection module 40. For example, when the power of the load detected by the detection module 40 is less than the preset power threshold, the processor module 70 controls both the first switch 61 and the second switch 62 to close, so that the state of the energy storage power supply during parallel power supply is the parallel capacity state.

[0043] Optionally, when both the first switch 61 and the second switch 62 are closed, the direct current of the two energy storage power supplies flows through the connecting line in parallel and then flows to the inverter module 20.

[0044] Specifically, when the output module 30 of the energy storage power supply is electrically connected to the load and the energy storage power supply operates in parallel with another energy storage power supply, the switching module 60 of the energy storage power supply is electrically connected to the switching module 60 of another energy storage power supply through a connecting line. If the power of the load detected by the detection module 40 is less than the preset power threshold, the processor module 70 controls both the first switch 61 and the second switch 62 to close, so that the direct current of each energy storage power supply is inverted into alternating current through the inverter module 20 of the energy storage power supply electrically connected to the load and then output to the load through the output module 30. At this time, the parallel state of the energy storage power supply is the parallel capacity state, that is, when the power of the load is small, the parallel capacity of the energy storage power supply can supply power to the load to meet the load demand, and at the same time, the waste of the electric energy stored in the energy storage power supply can be avoided.

[0045] Optionally, when both the first switch 61 and the third switch 63 are closed, the direct current of the energy storage power supply is converted into alternating current through the inverter module 20 and then output through the connecting line and the alternating current of another energy storage power supply through the output module 30.

[0046] Specifically, when the output module 30 of the energy storage power supply is electrically connected to the load and the energy storage power supply operates in parallel with another energy storage power supply, the switching module 60 of the energy storage power supply is electrically connected to the switching module 60 of another energy storage power supply through a connecting line. If the power of the load detected by the detection module 40 is greater than the preset power threshold, the processor module 70 controls both the first switch 61 and the third switch 63 to close, so that the alternating current inverted by the inverter module 20 of each energy storage power supply is output to the load through the output module 30 of the energy storage power supply electrically connected to the load. At this time, the parallel state of the energy storage power supply is the parallel power state, that is, when the power of the load is large, the parallel power of the energy storage power supply supplies power to the load, and can provide electric energy with doubled power to the load, so that the electric energy provided to the load meets the load demand.

[0047] When two energy storage power supplies are connected in parallel to supply power to a load, the load is electrically connected to the output module 30 of one of the energy storage power supplies. The switching modules 60 of the two energy storage power supplies are electrically connected through a connecting wire. The detection module 40 of the energy storage power supply electrically connected to the load detects the power of the load. When the power of the load is less than the preset power threshold, the processor module 70 of the energy storage power supply electrically connected to the load controls both the first switch 61 and the second switch 62 to close, so that the direct current of the battery module 10 is transmitted to the inverter module through the first switch 61. The processor module 70 of the other energy storage power supply controls the second switch 62 to close, so that the direct current of the battery module 10 is transmitted through the second switch 62 and the connecting wire to the second switch 62 of the energy storage power supply electrically connected to the load, and is transmitted to the inverter module 20 through the first switch 61. Thus, the direct currents of the two energy storage power supplies are both inverted into alternating current through the inverter module 20 of the energy storage power supply electrically connected to the load, and are transmitted to the load through the output module 30 electrically connected to the load to supply power to the load. At this time, the parallel state of the two energy storage power supplies is the parallel capacity state, that is, when the load power is small, the energy storage power supply can supply power to the load with parallel capacity, which can meet the load's electrical energy demand and avoid wasting the electrical energy stored in the energy storage power supply. Among them, the preset power threshold can be 80% of the maximum output power of the energy storage power supply. When the power of the load is greater than the preset power threshold, the processor module 70 of the energy storage power supply electrically connected to the load controls both the first switch 61 and the third switch 63 to close, so that the direct current of the battery module 10 is transmitted to the inverter module through the first switch 61. The processor module 70 of the other energy storage power supply controls both the first switch 61 and the third switch 63 to close, so that the direct current of the battery module 10 is inverted into alternating current through the first switch 61 and the inverter module 20, and the alternating current is transmitted through the third switch 63 and the connecting wire to the third switch 63 of the energy storage power supply electrically connected to the load. Thus, the alternating current is transmitted to the output module 30 through the third switch 63, so that the alternating currents of the two energy storage power supplies are both output through the output module 30 of the energy storage power supply electrically connected to the load. The communication module 50 of the energy storage power supply electrically connected to the load communicates with the communication module 50 of the other energy storage power supply, receives the communication signal sent by the communication module 50 of the other energy storage power supply. The communication signal includes the voltage and phase signals of the alternating current of the other energy storage power supply. The processor module 70 of the energy storage power supply electrically connected to the load controls the voltage and phase of the alternating current output by the inverter module 20 according to the communication signal received by the communication module 50, so that the voltage and phase of the alternating currents of the two energy storage power supplies are consistent. The alternating currents of the two energy storage power supplies are both transmitted to the load through the output module 30 electrically connected to the load to supply power to the load. At this time, the parallel state of the two energy storage power supplies is the parallel power state, so as to provide the load with electrical energy with doubled power, so that the electrical energy supplied to the load meets the load demand. That is, when the energy storage power supplies are operating in parallel, they can automatically switch between the parallel power state and the parallel capacity state according to the detected power of the load, thus effectively increasing the usage duration of the energy storage power supplies.

[0048] Optionally, the communication mode of the communication module 50 is a wireless communication mode, and the wireless communication mode is wifi or bluetooth or zigbee.

[0049] Specifically, bluetooth communication can be used when two energy storage power supplies are in parallel, wifi communication can be used when more than two energy storage power supplies are in parallel, and zigbee communication can be used when the distance between the parallel energy storage power supplies is relatively small.

[0050] It should be noted that the above wireless communication mode of the communication module 50 is only for illustrative purposes, and the wireless communication mode of the communication module 50 can be specifically set according to the actual situation and is not limited herein.

[0051] Embodiment 2

[0052] Figure 3 FIG. is a structural block diagram of an energy storage power supply parallel control device provided in Embodiment 2 of the present invention. This embodiment is applicable to situations such as powering a power supply device. The energy storage power supply parallel control device includes: at least two energy storage power supplies 100 as described in Embodiment 1 and a connection line 200 connecting at least two energy storage power supplies. The connection line 200 connects the switching modules 60 of at least two energy storage power supplies 100.

[0053] Specifically, the switching modules 60 of each energy storage power supply 100 in the energy storage power supply parallel control device are all connected through connecting wires 200. When the energy storage power supply parallel control device is working, the output module 30 of one energy storage power supply, such as energy storage power supply A, is electrically connected to the load. The detection module 40 of energy storage power supply A detects the power of the load. When the power of the load is less than the preset power threshold, the processor module 70 of energy storage power supply A controls the switching module 60 to be electrically connected to the inverter module 20, and the processor module 70 of energy storage power supply B controls the switching module 60 to be electrically connected to the output module 30, so that the direct current of energy storage power supply B is transmitted to the switching module 60 of energy storage power supply A through the switching module 60, so that the direct currents of the two energy storage power supplies are both inverted into alternating current by the inverter module 20 of energy storage power supply A and transmitted to the load through the output module 30 of energy storage power supply A to supply power to the load. At this time, the parallel state of the two energy storage power supplies is the parallel capacity state, that is, when the load power is small, the energy storage power supply can supply power to the load with parallel capacity, which can meet the load's power demand and avoid wasting the electric energy stored in the energy storage power supply; among them, the preset power threshold can be 80% of the highest output power of the energy storage power supply; when the power of the load is greater than the preset power threshold, the processor module 70 of energy storage power supply A controls the switching module 60 to be electrically connected to the inverter module 20 and controls the switching module 60 to connect the loop with the connecting wire 200 to the output module 30. The processor module 70 of energy storage power supply B controls the switching module 60 to be electrically connected to the inverter module 20 and controls the switching module 60 to connect the loop with the connecting wire 200 to the output module 30, so that the direct current of energy storage power supply B is inverted into alternating current by the inverter module 20, and the alternating current is transmitted to the switching module 60 of energy storage power supply A through the connecting wire 200, so that the alternating current is transmitted to the output module 30 through the switching module 60. At the same time, the direct current of energy storage power supply A is transmitted to the inverter module 20 through the switching module 60, and the inverter module 20 inverts the direct current. The communication module 50 of energy storage power supply A communicates with the communication module 50 of energy storage power supply B and receives the communication signal sent by the communication module 50 of energy storage power supply B. The communication signal includes the voltage and phase signals of the alternating current of energy storage power supply B. The processor module 70 of energy storage power supply A controls the voltage and phase of the alternating current output by the inverter module 20 according to the communication signal received by the communication module 50, so that the voltage and phase of the alternating currents of the two energy storage power supplies are the same. The alternating currents of the two energy storage power supplies are both transmitted to the load through the output module 30 electrically connected to the load to supply power to the load. At this time, the parallel state of the two energy storage power supplies is the parallel power state, so as to provide the load with electric energy with doubled power, so that the electric energy supplied to the load meets the load demand. That is, when the energy storage power supplies are working in parallel, they can automatically switch between the parallel power state and the parallel capacity state according to the detected power of the load, thereby effectively increasing the service life of the energy storage power supply.

[0054] The energy storage power supply parallel control device provided in this embodiment includes at least two energy storage power supplies as described in Embodiment 1 and connection lines connecting at least two energy storage power supplies. The connection lines are connected to the switching modules of at least two energy storage power supplies. Compared with the existing energy storage power supply parallel control device, the energy storage power supply parallel control device provided in this embodiment controls the switching module to be electrically connected to the inverter module or the output module through the processor module. If the power of the load is less than the output power of the energy storage power supply, the parallel capacity state of the energy storage power supply can be realized through the control of the processor, which can avoid wasting the electric energy stored in the energy storage power supply while meeting the electric energy demand of the load; if the power of the load is greater than the output power of the energy storage power supply, the parallel power state of the energy storage power supply can be realized through the control of the processor, providing the load with electric energy with doubled power to make the electric energy supplied to the load meet the load demand, that is, the energy storage power supply parallel control device can automatically switch between the parallel power state and the parallel capacity state according to the power of the load, thereby effectively increasing the service life of the energy storage power supply parallel control device.

[0055] Figure 4 It is the structural block diagram of another energy storage power supply parallel control device provided in Embodiment 2 of the present invention. Refer to Figure 4 Optionally, the switching module 60 includes a first switch 61, a second switch 62, a third switch 63, a first branch L1 and a second branch L2. The first switch 61 is electrically connected to the inverter module 20 through the first branch L1, and the second switch 62 and the third switch 63 are electrically connected to the output module 30 through the second branch L2.

[0056] Among them, when the first switch 61 is closed, it can connect the battery module 10 and the inverter module 20. When the first switch 61 and the second switch 62 are closed, it can connect the inverter module 20 and the battery module 10 of another energy storage power supply. When the first switch 61 and the third switch 63 are closed, it can connect the output module 30 and the inverter module 20 of another energy storage power supply. Different paths can be connected by the on-off of each switch.

[0057] Optionally, when the power of the load is less than the preset power threshold, the processor module 70 is used to control the first switch 61 and the second switch 62 to be closed, and the parallel state of the energy storage power supply 100 is the parallel capacity state; when the power of the load is greater than the preset power threshold, the processor module 70 is used to control the second switch 62 and the third switch 63 to be closed, and the parallel state of the energy storage power supply 100 is the parallel power state. The processor module 70 is also used to adjust the voltage and phase output by the inverter module 20 according to the signal of the communication module 50.

[0058] Specifically, when the energy storage power supply parallel control device is working, if the output module 30 of the energy storage power supply A is electrically connected to the load, the detection module 40 of the energy storage power supply A detects the power of the load. When the power of the load is less than the preset power threshold, the processor module 70 of the energy storage power supply A controls both the first switch 61 and the second switch 62 of the energy storage power supply A to be closed, and the processor module 70 of the energy storage power supply B controls the second switch 62 of the energy storage power supply B to be closed. At this time, the direct current of the energy storage power supply B is transmitted to the inverter module 20 of the energy storage power supply A through the connection line 200, that is, the direct currents of the two energy storage power supplies can be inverted and output through the inverter module 20 of the energy storage power supply A. At this time, the two energy storage power supplies are in the parallel capacity state, that is, when the load power is small, the energy storage power supplies A and B can supply power to the load in parallel capacity, which can meet the load's electrical energy demand and avoid wasting the electrical energy stored in the energy storage power supply. When the power of the load is greater than the preset power threshold, the processor module 70 of the energy storage power supply A controls both the first switch 61 and the third switch 63 of the energy storage power supply A to be closed. When the processor module 70 of the energy storage power supply B controls both the first switch 61 and the third switch 63 of the energy storage power supply B to be closed, at this time, the alternating current of the energy storage power supply B is transmitted to the output module 30 of the energy storage power supply A through the connection line 200, and the processor module 70 of the energy storage power supply A adjusts the voltage and phase of the alternating current output by the inverter module 20 according to the signal of the communication module 50 to make the voltage and phase of the alternating currents of the two energy storage power supplies consistent. The alternating currents of the energy storage power supplies A and B can be output through the output module 30 of the energy storage power supply A to supply power to the load. At this time, the energy storage power supplies A and B are in the parallel power state, so as to provide the load with electrical energy with doubled power to make the electrical energy supplied to the load meet the load demand. That is, the energy storage power supply parallel control device can automatically switch between the parallel power state and the parallel capacity state according to the power of the load, thereby effectively increasing the usage duration of the energy storage power supply.

[0059] Optionally, the preset power threshold is 80% of the maximum output power of the energy storage power supply.

[0060] Specifically, the preset power threshold is set to 80% of the maximum output power of the energy storage power supply, so that a single energy storage power supply does not operate at its limit, thereby reducing the heat generation or loss of a single energy storage power supply.

[0061] It should be noted that the preset power threshold can be specifically set according to actual conditions and is not limited here.

[0062] Embodiment III

[0063] Figure 5 It is a flowchart of a control method for an energy storage power supply parallel control device provided in Embodiment III of the present invention. This embodiment is applicable to situations such as powering a power supply device. This control method is executed by the processor module of the energy storage power supply described in any of the above embodiments, and specifically includes the following steps:

[0064] Step 110: Obtain the power of the load detected by the detection module.

[0065] Among them, the processor module of the energy storage power supply can obtain the power of the load detected by the detection module through the input port set by itself and electrically connected to the detection module, so as to control the parallel state of the energy storage power supply according to the magnitude of the load power.

[0066] Step 120: When the power of the load is greater than the preset power threshold, wake up the communication module and make the energy storage power supply enter the parallel power state by controlling the switching module.

[0067] Among them, the preset power threshold can be 80% of the maximum output power of the energy storage power supply. When the power of the load is greater than the preset power threshold, the processor module wakes up the communication module and makes the energy storage power supply enter the parallel power state. During the parallel operation of the energy storage power supply, the processor module can control the inverter module to adjust the voltage and signal of the output alternating current according to the signal of the communication module, so that the voltage and signal of the alternating current output by the energy storage power supply are consistent with those of other energy storage power supplies during parallel power supply, so as to provide power-multiplied electric energy for the load and meet the electric energy demand of the load with a larger power.

[0068] Step 130: When the power of the load is less than the preset power threshold, control the communication module to close and make the energy storage power supply enter the parallel capacity state by controlling the switching module.

[0069] Specifically, when the power of the load is less than the preset power threshold, the processor module controls the communication module to close and makes the energy storage power supply enter the parallel capacity state, that is, when the load power is small, the energy storage power supply can supply power to the load with parallel capacity, which can meet the load electric energy demand and avoid wasting the electric energy stored in the energy storage power supply.

[0070] Exemplarily, take Figure 3Taking two energy storage power supplies A and B in parallel as an example, the two energy storage power supplies A and B are connected in parallel to supply power to a load. If the output module 30 of the energy storage power supply A is electrically connected to the load, the processor module 70 of the energy storage power supply A obtains the power of the load detected by the detection module 40. When the power of the load is greater than a preset power threshold, the processor module 70 of the energy storage power supply A wakes up the communication module 50 and controls the switching module 60 to be electrically connected to the inverter module 20, and controls the loop with a connecting line between the switching module 60 and the output module 30 to be connected. The processor module 70 of the energy storage power supply B controls the switching module 60 to be electrically connected to the inverter module 20, and controls the loop with a connecting line 200 between the switching module 60 and the output module 30 to be connected, so that the direct current of the energy storage power supply B is inverted into alternating current through the inverter module 20, and the alternating current is transmitted to the switching module 60 of the energy storage power supply A through the connecting line 200, so that the alternating current is transmitted to the output module 30 through the switching module 60. At the same time, the direct current of the energy storage power supply A is transmitted to the inverter module 20 through the switching module 60, and the inverter module 20 inverts the direct current. The communication module 50 of the energy storage power supply A communicates with the communication module 50 of the energy storage power supply B and receives the communication signal sent by the communication module 50 of the energy storage power supply B. The communication signal includes the voltage and phase signal of the alternating current of the energy storage power supply B. The processor module 70 of the energy storage power supply A controls the voltage and phase of the alternating current output by the inverter module 20 according to the communication signal received by the communication module 50, so that the voltage and phase of the alternating current of the two energy storage power supplies are the same. The alternating current of the two energy storage power supplies is transmitted to the load through the output module 30 electrically connected to the load to supply power to the load. At this time, the parallel state of the two energy storage power supplies is the parallel power state, so as to provide the load with electric energy with doubled power, so that the electric energy supplied to the load meets the load demand; wherein, the preset power threshold can be 80% of the highest output power of the energy storage power supply; when the power of the load is less than the preset power threshold, the processor module 70 of the energy storage power supply A controls the communication module 50 to be turned off and controls the switching module 60 to be electrically connected to the inverter module 20. The processor module 70 of the energy storage power supply B controls the switching module 60 to be electrically connected to the output module 30, so that the direct current of the energy storage power supply B is transmitted to the switching module 60 of the energy storage power supply A through the switching module 60, so that the direct current of the two energy storage power supplies is inverted into alternating current through the inverter module 20 of the energy storage power supply A and transmitted to the load through the output module 30 of the energy storage power supply A to supply power to the load. At this time, the parallel state of the two energy storage power supplies is the parallel capacity state, that is, when the load power is small, the energy storage power supplies A and B can supply power to the load with parallel capacity, which can meet the load electric energy demand and avoid wasting the electric energy stored in the energy storage power supply at the same time. That is, the energy storage power supplies A and B can automatically switch between the parallel power state and the parallel capacity state according to the detected load power when working in parallel, so as to effectively increase the usage time of the energy storage power supply.

[0071] The control method of the energy storage power supply parallel control device provided in this embodiment and the energy storage power supply and the energy storage power supply parallel control device provided in any embodiment of the present invention belong to the same inventive concept and have corresponding beneficial effects. For the technical details not elaborated in this embodiment, please refer to the energy storage power supply and the energy storage power supply parallel control device provided in any embodiment of the present invention.

[0072] Note that the above is only the preferred embodiment of the present invention and the technical principles applied. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein. Various obvious changes, re-adjustments, combinations, and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the inventive concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A energy storage power supply, characterized in that, Comprising: A battery module; An inverter module, electrically connected to the battery module, for converting the direct current of the battery module into alternating current; An output module; Electrically connected to the inverter module, for outputting alternating current outward after turning on the inverter module; A detection module, electrically connected to the output module, for detecting the power of a load electrically connected to an energy storage power supply through the output module; A communication module, communicatively connected to another energy storage power supply; A switching module, electrically connected to the inverter module or electrically connected to the output module; A processor module, electrically connected to the detection module, the communication module, and the switching module, for controlling the switching module to be electrically connected to the inverter module or electrically connected to the output module according to the power of the load detected by the detection module; The switching module includes a first switch, a second switch, a third switch, a first branch, and a second branch. The first switch is electrically connected to the inverter module through the first branch, and the second switch and the third switch are electrically connected to the output module through the second branch; When both the first switch and the third switch are closed, the direct current of the energy storage power supply is converted into alternating current through the inverter module and then output through the output module together with the alternating current of another energy storage power supply through a connecting line; the processor module adjusts the voltage and phase of the output of the inverter module according to the signal of the communication module; Wherein, when both the first switch and the third switch are closed, the direct current of the energy storage power supply is converted into alternating current through the inverter module and then output through the output module together with the alternating current of another energy storage power supply through a connecting line, including: The processor module of the energy storage power supply electrically connected to the load controls both the first switch and the third switch of the energy storage power supply electrically connected to the load to be closed, so that the direct current of the battery module of the energy storage power supply electrically connected to the load is transmitted to the inverter module of the energy storage power supply electrically connected to the load through the first switch of the energy storage power supply electrically connected to the load; The processor module of another energy storage power supply controls both the first switch and the third switch of the another energy storage power supply to be closed, so that the direct current of the battery module of the another energy storage power supply is inverted into alternating current through the first switch and the inverter module of the another energy storage power supply, and is transmitted to the third switch of the energy storage power supply electrically connected to the load through the third switch and the connecting line of the another energy storage power supply, and then is transmitted to the output module of the energy storage power supply electrically connected to the load through the third switch of the energy storage power supply electrically connected to the load; When both the first switch and the second switch are closed, the direct currents of the two energy storage power supplies flow to the inverter module in parallel through the connecting line; Wherein, when both the first switch and the second switch are closed, the direct currents of the two energy storage power supplies flow to the inverter module in parallel through the connecting line, including: The processor module of the energy storage power supply electrically connected to the load controls both the first switch and the second switch of the energy storage power supply electrically connected to the load to be closed, so that the direct current of the battery module of the energy storage power supply electrically connected to the load is transmitted to the inverter module of the energy storage power supply electrically connected to the load through the first switch of the energy storage power supply electrically connected to the load; The processor module of another energy storage power source controls the closing of the second switch of the another energy storage power source, so that the direct current of the battery module of the another energy storage power source is transmitted through the second switch and the connecting wire of the another energy storage power source to the second switch of the energy storage power source electrically connected to the load, and is transmitted to the inverter module of the energy storage power source electrically connected to the load through the first switch of the energy storage power source electrically connected to the load, so that the direct currents of the two energy storage power sources are inverted into alternating current through the inverter module of the energy storage power source electrically connected to the load, and are transmitted to the load through the output module electrically connected to the load.

2. The energy storage power supply according to claim 1, wherein The processor module is used to control the switch states of the first switch, the second switch and the third switch according to the power of the load detected by the detection module.

3. The energy storage power supply according to claim 1, wherein The communication mode of the communication module is a wireless communication mode, and the wireless communication mode is wifi or bluetooth or zigbee.

4. A parallel control device for an energy storage power supply, characterized in that, Including: At least two energy storage power sources as described in any one of claims 1-3 and connecting wires connecting at least two of the energy storage power sources, and the connecting wires connect the switching modules of at least two energy storage power sources.

5. The energy storage power supply parallel control device according to claim 4, wherein, The switching module includes a first switch, a second switch, a third switch, a first branch and a second branch. The first switch is electrically connected to the inverter module through the first branch, and the second switch and the third switch are electrically connected to the output module through the second branch.

6. The energy storage power supply parallel control device according to claim 5, wherein, When the power of the load is less than the preset power threshold, the processor module is used to control the first switch and the second switch to close, and the parallel state of the energy storage power sources is the parallel capacity state; When the power of the load is greater than the preset power threshold, the processor module is used to control the first switch and the third switch to close, the parallel state of the energy storage power sources is the parallel power state, and the processor module is further used to adjust the voltage and phase output by the inverter module according to the signal of the communication module.

7. The parallel control device for energy storage power sources according to claim 6, wherein The preset power threshold is 80% of the maximum output power of the energy storage power source.

8. A parallel control method for an energy storage power supply, characterized in that, The energy storage power source parallel control method is executed by the processor module of the energy storage power source as described in any one of claims 1-3, and the method includes: Obtain the power of the load detected by the detection module; When the power of the load is greater than the preset power threshold, wake up the communication module and make the energy storage power source enter the parallel power state by controlling the switching module; When the power of the load is less than the preset power threshold, control the communication module to close and make the energy storage power source enter the parallel capacity state by controlling the switching module.

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