CN218005970U - Energy storage system and equipment - Google Patents
Energy storage system and equipment Download PDFInfo
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- CN218005970U CN218005970U CN202221657528.2U CN202221657528U CN218005970U CN 218005970 U CN218005970 U CN 218005970U CN 202221657528 U CN202221657528 U CN 202221657528U CN 218005970 U CN218005970 U CN 218005970U
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Abstract
The application provides an energy storage system and equipment, the system comprises a voltage shunt conversion circuit, a plurality of battery modules and a power supply circuit, wherein the input end of the voltage shunt conversion circuit is electrically connected with a voltage source, the voltage shunt conversion circuit is used for converting alternating current voltage output by the voltage source into direct current voltage, and one output end of the voltage shunt conversion circuit outputs one path of sub-direct current voltage; the input end of one battery module is electrically connected with the output end of one voltage shunt conversion circuit; the input end of the power supply circuit is electrically connected with the output end of at least one battery module. Through voltage shunting converting circuit, convert the alternating voltage of voltage source into DC voltage, shunt one kind of DC voltage into multichannel sub-DC voltage again, for the battery module charges, the battery module provides one kind or multichannel source voltage, with electric circuit rethread selection multichannel or one kind source voltage to convert multichannel or one kind source voltage into supply voltage, supply power, thereby reduced the loss.
Description
Technical Field
The application relates to the technical field of charging, in particular to an energy storage system and equipment.
Background
In recent years, with the development of power electronic technology, the technical problems faced by dc power distribution are gradually solved, and the technical advantages of dc power distribution are also presented. Compare in AC distribution, energy storage container DC distribution can show and improve the operation level, makes energy storage container distribution simpler, high-efficient, cheap, safety to can reduce energy storage system's supplementary consumption, improve energy storage efficiency.
The existing energy storage system adopts an alternating current distribution form, one path of alternating current power supply is taken from the alternating current side of the energy storage converter, then one path of alternating current power supply is taken from the outside, and power is supplied to electric equipment through an alternating current change-over switch.
SUMMERY OF THE UTILITY MODEL
The application mainly aims to provide an energy storage system and equipment to solve the problem that the loss of a power distribution form of the energy storage system in the existing scheme is high.
In order to achieve the above object, according to one aspect of the present application, an energy storage system is provided, which includes a voltage-dividing conversion circuit, a plurality of battery modules, and a power supply circuit, where the voltage-dividing conversion circuit has an input end and a plurality of output ends, the input end of the voltage-dividing conversion circuit is electrically connected to a voltage source, the voltage-dividing conversion circuit is configured to convert an ac voltage output by the voltage source into a dc voltage, and is configured to divide one path of the dc voltage into a plurality of paths of sub-dc voltages, and one output end of the voltage-dividing conversion circuit outputs one path of the sub-dc voltage; each battery module is provided with an input end and an output end, and the input end of one battery module is electrically connected with the output end of one voltage shunt conversion circuit; the power supply circuit is provided with an input end and an output end, the input end of the power supply circuit is electrically connected with the output end of at least one battery module, and the output end of the power supply circuit outputs power supply voltage.
Further, the voltage-dividing conversion circuit comprises an energy storage converter and a current divider, wherein the energy storage converter has an input end and an output end, and the input end of the energy storage converter is electrically connected with the voltage source and is used for converting the alternating-current voltage into the direct-current voltage; the shunt is provided with an input end and a plurality of output ends, the input end of the shunt is electrically connected with the output end of the energy storage converter, the shunt is used for shunting one path of direct current voltage into a plurality of paths of sub direct current voltages, and one output end of the shunt is electrically connected with one input end of the battery module.
Further, one of the battery modules comprises a high-voltage box and a battery cluster, the high-voltage box is provided with an input end, a first output end and a second output end, the input end of the high-voltage box is electrically connected with one of the output ends of the voltage shunt conversion circuit, and the first output end of the high-voltage box is electrically connected with the input end of the power supply circuit; the battery cluster is electrically connected with the second output end of the high-voltage box.
Further, the power supply circuit includes a switching circuit and a voltage conversion circuit; the switching circuit is provided with a plurality of input ends and output ends, one input end of the switching circuit is electrically connected with the first output end of one high-voltage box, the output end of the switching circuit outputs one or more paths of source voltages, and the first output end of one high-voltage box outputs one path of source voltages; the voltage conversion circuit is provided with an input end and an output end, the input end of the voltage conversion circuit is electrically connected with the output end of the switching circuit and is used for converting one path or multiple paths of source voltage into the power supply voltage, and the output end of the voltage conversion circuit is used for being electrically connected with electric equipment.
Further, the switching circuit includes a plurality of switches, a first end of one switch is electrically connected to a first output end of one of the high-voltage boxes, and a second end of the other switch is electrically connected to an input end of the voltage conversion circuit, where the high-voltage box is successfully connected to the voltage conversion circuit when the switch is in the first state, and the high-voltage box is not successfully connected to the voltage conversion circuit when the switch is in the second state.
Further, the battery cluster comprises a plurality of single battery cells which are electrically connected in sequence.
Further, the powered device includes at least one of: fire-fighting electric equipment, air conditioners, lighting equipment and exhaust fans.
Further, the voltage conversion circuit has a plurality of output terminals, and an output terminal of one of the voltage conversion circuits is used for being electrically connected with one of the electric devices.
Further, the voltage conversion circuit is a buck voltage conversion circuit.
According to another aspect of the present application, there is provided an energy storage device comprising any one of the energy storage systems described above.
Use the technical scheme of this application, through voltage shunting converting circuit, convert the alternating voltage of voltage source into DC voltage, will be all the way again DC voltage shunts for multichannel sub-DC voltage, for battery module charges, and the battery module provides one kind or multichannel source voltage, selects multichannel or one the source voltage with circuit rethread, and with multichannel or one the source voltage converts power supply voltage into, supplies power to the loss has been reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the application, and the description of the exemplary embodiments and illustrations of the application are intended to explain the application and are not intended to limit the application. In the drawings:
FIG. 1 illustrates a schematic diagram of an energy storage system according to an embodiment of the present application;
fig. 2 shows a schematic diagram of a prior art according to an embodiment of the present application.
Wherein the figures include the following reference numerals:
10. a voltage shunt switching circuit; 11. an energy storage converter; 12. a flow divider; 20. a battery module; 21. a high pressure tank; 22. a battery cluster; 30. a power supply circuit; 31. a switching circuit; 32. a voltage conversion circuit; 40. fire-fighting electric equipment; 50. an air conditioner; 60. a lighting device; 70. an exhaust fan.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, 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 application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. Also, in the specification and claims, when an element is described as being "connected" to another element, the element may be "directly connected" to the other element or "connected" to the other element through a third element.
As introduced in the background art, the existing energy storage system adopts an ac power distribution form, which includes taking one path of ac power from the ac side of the energy storage converter, then taking one path of ac power from the outside, and supplying power to the electric equipment through the ac transfer switch.
An embodiment of the present application provides an energy storage system, as shown in fig. 1, the system includes a voltage-shunt conversion circuit 10, a plurality of battery modules 20, and a power supply circuit 30, the voltage-shunt conversion circuit 10 has an input end and a plurality of output ends, the input end of the voltage-shunt conversion circuit 10 is electrically connected to a voltage source VCC, the voltage-shunt conversion circuit 10 is configured to convert an ac voltage output by the voltage source VCC into a dc voltage, and is configured to shunt one path of the dc voltage into a plurality of paths of sub-dc voltages, and one output end of the voltage-shunt conversion circuit 10 outputs one path of the sub-dc voltage; each of the battery modules 20 has an input terminal and an output terminal, and the input terminal of one of the battery modules 20 is electrically connected to the output terminal of one of the voltage shunt conversion circuits 10; the power supply circuit 30 has an input terminal and an output terminal, the input terminal of the power supply circuit 30 is electrically connected to the output terminal of at least one of the battery modules 20, and the output terminal of the power supply circuit 30 outputs a power supply voltage. Through voltage shunting converting circuit 10, convert the alternating voltage of voltage source VCC into DC voltage, shunt the aforesaid DC voltage of a way into multichannel sub DC voltage again, charge for battery module 20, battery module 20 provides one or multichannel source voltage, with above-mentioned source voltage of electric circuit rethread selection multichannel or one way to convert the supply voltage into with multichannel or above-mentioned source voltage of a way, supply power, thereby reduced the loss.
The energy storage system can improve the power distribution safety level of the existing energy storage container, reduces the power loss and the cost of auxiliary power distribution, provides a proper control strategy through the battery management system, can improve the balance among battery clusters, and has the advantages of high efficiency, low cost and high safety comprehensively. The method not only improves the reliability of power supply of the electric equipment and reduces the line loss and equipment purchase cost, but also can effectively provide a simple and reliable active balancing scheme for multiple batteries.
In an embodiment of the present application, as shown in fig. 1, the voltage-dividing converting circuit 10 includes an energy-storing converter 11 and a current divider 12, the energy-storing converter 11 has an input end and an output end, the input end of the energy-storing converter 11 is electrically connected to the voltage source VCC for converting the ac voltage into the dc voltage; the shunt 12 has an input terminal and a plurality of output terminals, the input terminal of the shunt 12 is electrically connected to the output terminal of the energy storage converter 11, the shunt 12 is used for shunting one of the dc voltages to a plurality of sub-dc voltages, and one output terminal of the shunt 12 is electrically connected to the input terminal of one of the battery modules 20. The ac voltage is converted into the dc voltage by the energy storage converter 11, and one path of the dc voltage is divided into multiple paths of the sub-dc voltages by the current divider 12, so as to charge the battery modules 20.
In an embodiment of the present application, as shown in fig. 1, one of the battery modules 20 includes a high voltage box 21 and a battery cluster 22, the high voltage box 21 has an input end, a first output end and a second output end, the input end of the high voltage box 21 is electrically connected to one of the output ends of the voltage shunt switching circuit 10, and the first output end of the high voltage box 21 is electrically connected to the input end of the power supply circuit 30; the battery cluster 22 is electrically connected to a second output terminal of the high-voltage case 21. The high-pressure tank 21 is used to control and protect the battery clusters 22.
In an embodiment of the present application, the power supply circuit 30 includes a switching circuit 31 and a voltage conversion circuit 32; the switching circuit 31 has a plurality of input terminals and output terminals, one input terminal of the switching circuit 31 is electrically connected to a first output terminal of one of the high-voltage boxes 21, the output terminal of the switching circuit 31 outputs one or more source voltages, and a first output terminal of one of the high-voltage boxes 21 outputs one of the source voltages; the voltage converting circuit 32 has an input terminal and an output terminal, the input terminal of the voltage converting circuit 32 is electrically connected to the output terminal of the switching circuit 31, and is configured to convert one or more of the source voltages into the supply voltage, and the output terminal of the voltage converting circuit 32 is configured to be electrically connected to an electric device.
Specifically, the switching circuit controls to convert the battery cluster with the highest SOC value into a corresponding power supply voltage for the electric equipment according to the SOC (State Of Charge) Of each battery cluster, and the corresponding type selection Of the electric equipment is a dc power input form. Because the switching circuit is provided with the power supply branches with multiple inputs, even if one branch (namely one battery cluster) breaks down and exits, the switching circuit can perform disconnection processing on the corresponding branch, thereby greatly improving the power supply reliability level of the electric equipment and also saving the uninterrupted power supply required in alternating current distribution. The power supply of each battery cluster loop is connected to a switching circuit, the direct current voltage of the battery cluster where the power supply is located and the SOC value of the battery cluster are different, the controller of the switching circuit can interact with the battery management system to obtain battery cluster information, under the condition that the voltage and the SOC value of the battery cluster are not consistent, the battery cluster needing to be balanced is converted into the power supply (namely power supply voltage) needed by electric equipment by the controller of the switching circuit according to the balancing target value of a plurality of battery clusters, the switching control logic is not limited to the switching control logic, the battery cluster can be switched in a single cluster mode or in a plurality of clusters, the battery cluster can be switched in a stepped mode or in a time-sharing mode, and in short, the aim is to control the electrical performance of the battery clusters to be at the same level.
In one embodiment of the present application, the switch circuit includes a plurality of switches, a first terminal of one switch is electrically connected to a first output terminal of one of the high voltage tanks, and a second terminal of one switch is electrically connected to an input terminal of the voltage converting circuit, and when the switch is in a first state, the high voltage tank is successfully connected to the voltage converting circuit, and when the switch is in a second state, the high voltage tank is not successfully connected to the voltage converting circuit.
In an embodiment of the present application, the battery cluster includes a plurality of single battery cells electrically connected in sequence.
In an embodiment of the present application, as shown in fig. 1, the electric device includes at least one of the following: fire-fighting electric equipment 40, an air conditioner 50, lighting equipment 60, and a ventilation fan 70. The purpose of supplying power to the fire-fighting electric equipment 40, the air conditioner 50, the lighting equipment 60 and the exhaust fan 70 is achieved.
In an embodiment of the present application, the voltage converting circuit has a plurality of output terminals, and an output terminal of one of the voltage converting circuits is used for electrically connecting to an electrical device. The purpose of supplying power to a plurality of electric devices is achieved.
In an embodiment of the application, the voltage conversion circuit is a buck voltage conversion circuit. The purpose that the supply voltage is less than one or more of the source voltages is achieved.
Embodiments of the present application further provide an energy storage device, which includes any one of the above energy storage systems. The alternating voltage of the voltage source is converted into direct voltage through the voltage shunt conversion circuit, one path of direct voltage is shunted into multi-path sub-direct voltage, the battery module is charged, one path or multi-path source voltage is provided for the battery module, the multi-path or one path of source voltage is selected through the power circuit, the multi-path or one path of source voltage is converted into power supply voltage, power is supplied, and therefore loss is reduced.
The prior art approach is shown in fig. 2.
It should be noted that the electrical connection may be a direct electrical connection or an indirect electrical connection, where a direct electrical connection means that two devices are directly connected, and an indirect electrical connection means that other devices such as a capacitor and a resistor are connected between a and B that are connected.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
From the above description, it can be seen that the above-described embodiments of the present application achieve the following technical effects:
1) The utility model provides an energy storage system, through voltage shunting converting circuit, convert the alternating voltage of voltage source into DC voltage, shunt the aforesaid DC voltage of the same kind of road again for multichannel sub-DC voltage, for battery module charges, the battery module provides one kind or multichannel source voltage, select multichannel or above-mentioned source voltage of the same kind with electric circuit rethread to convert multichannel or above-mentioned source voltage of the same kind into supply voltage, supply power, thereby reduced the loss.
2) The utility model provides an energy storage equipment, through voltage shunting converting circuit, convert the alternating voltage of voltage source into DC voltage, again with the reposition of redundant personnel of above-mentioned DC voltage of the same kind for multichannel sub-DC voltage, for the battery module charges, the battery module provides one kind or multichannel source voltage, with above-mentioned source voltage of circuit rethread selection multichannel or the same kind to with multichannel or above-mentioned source voltage conversion of the same kind power supply voltage, supply power, thereby reduced the loss.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. An energy storage system, comprising:
the voltage shunt conversion circuit is provided with an input end and a plurality of output ends, the input end of the voltage shunt conversion circuit is electrically connected with a voltage source, the voltage shunt conversion circuit is used for converting alternating-current voltage output by the voltage source into direct-current voltage and shunting one path of the direct-current voltage into a plurality of paths of sub-direct-current voltages, and one output end of the voltage shunt conversion circuit outputs one path of the sub-direct-current voltages;
the input end of one battery module is electrically connected with the output end of one voltage shunt conversion circuit;
and the power supply circuit is provided with an input end and an output end, the input end of the power supply circuit is electrically connected with the output end of at least one battery module, and the output end of the power supply circuit outputs power supply voltage.
2. The system of claim 1, wherein the voltage shunt conversion circuit comprises:
the energy storage converter is provided with an input end and an output end, and the input end of the energy storage converter is electrically connected with the voltage source and used for converting the alternating-current voltage into the direct-current voltage;
the shunt is provided with an input end and a plurality of output ends, the input end of the shunt is electrically connected with the output end of the energy storage converter, the shunt is used for shunting one path of direct current voltage into a plurality of paths of sub direct current voltages, and one output end of the shunt is electrically connected with one input end of the battery module.
3. The system of claim 1, wherein one of the battery modules comprises:
the high-voltage box is provided with an input end, a first output end and a second output end, the input end of the high-voltage box is electrically connected with one of the output ends of the voltage shunt conversion circuit, and the first output end of the high-voltage box is electrically connected with the input end of the power supply circuit;
and the battery cluster is electrically connected with the second output end of the high-voltage box.
4. The system of claim 3, wherein the power supply circuit comprises:
the switching circuit is provided with a plurality of input ends and output ends, one input end of the switching circuit is electrically connected with the first output end of one high-voltage box, the output end of the switching circuit outputs one or more paths of source voltages, and the first output end of one high-voltage box outputs one path of source voltages;
the voltage conversion circuit is provided with an input end and an output end, the input end of the voltage conversion circuit is electrically connected with the output end of the switching circuit and used for converting one path or multiple paths of source voltage into the power supply voltage, and the output end of the voltage conversion circuit is used for being electrically connected with electric equipment.
5. The system of claim 4, wherein the switch circuit comprises a plurality of switches, a first terminal of one switch electrically connected to a first output terminal of one of the high voltage tanks, and a second terminal of one switch electrically connected to an input terminal of the voltage conversion circuit, wherein the high voltage tank is successfully connected to the voltage conversion circuit when the switch is in the first state, and wherein the high voltage tank is not successfully connected to the voltage conversion circuit when the switch is in the second state.
6. The system of claim 3, wherein the battery cluster comprises a plurality of individual cells electrically connected in sequence.
7. The system of claim 4, wherein the powered device comprises at least one of:
fire-fighting electric equipment, an air conditioner, lighting equipment and an exhaust fan.
8. The system of claim 4, wherein the voltage conversion circuit has a plurality of outputs, an output of one of the voltage conversion circuits being configured to be electrically connected to a powered device.
9. The system of claim 4, wherein the voltage conversion circuit is a buck-type voltage conversion circuit.
10. An energy storage device, characterized by comprising the energy storage system of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221657528.2U CN218005970U (en) | 2022-06-29 | 2022-06-29 | Energy storage system and equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221657528.2U CN218005970U (en) | 2022-06-29 | 2022-06-29 | Energy storage system and equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218005970U true CN218005970U (en) | 2022-12-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221657528.2U Active CN218005970U (en) | 2022-06-29 | 2022-06-29 | Energy storage system and equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218005970U (en) |
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2022
- 2022-06-29 CN CN202221657528.2U patent/CN218005970U/en active Active
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