CN219937966U - Energy storage and electricity supplementing system - Google Patents
Energy storage and electricity supplementing system Download PDFInfo
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- CN219937966U CN219937966U CN202320474604.4U CN202320474604U CN219937966U CN 219937966 U CN219937966 U CN 219937966U CN 202320474604 U CN202320474604 U CN 202320474604U CN 219937966 U CN219937966 U CN 219937966U
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- 238000004146 energy storage Methods 0.000 title claims abstract description 133
- 230000001502 supplementing effect Effects 0.000 title abstract description 20
- 230000005611 electricity Effects 0.000 title abstract description 11
- 238000006243 chemical reaction Methods 0.000 claims abstract description 17
- 239000013589 supplement Substances 0.000 claims abstract description 15
- 238000012544 monitoring process Methods 0.000 claims description 11
- 238000004891 communication Methods 0.000 claims description 8
- 238000007599 discharging Methods 0.000 abstract description 5
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Abstract
The utility model discloses an energy storage and power supply system, and belongs to the technical field of energy storage. The energy storage and electricity supplementing system comprises: the power distribution system is used for connecting an external power supply end; the energy storage conversion system comprises a plurality of DC/AC converters, and is electrically connected with the power distribution system; the controller is electrically connected with the power distribution system and the energy storage variable current system, the controller is used for controlling the plurality of DC/AC converters to supplement power for the plurality of battery clusters of the energy storage system, and the DC/AC converters are electrically connected with the battery clusters. The energy storage and electricity supplementing system is configured through the wood type system of the energy storage and current transformation system, meets the requirements of grid-connected charging and discharging of alternating current sides with different voltages, and meanwhile, a plurality of DC/AC converters are connected in parallel in multiple machines, so that the energy storage and current supplementing system has good capacity expansion, can supplement electricity for energy storage systems with different battery clusters, is compatible with various battery boxes, and supplements electricity for different energy storage systems.
Description
Technical Field
The utility model belongs to the technical field of energy storage, and particularly relates to an energy storage and power supply system.
Background
At present, most energy storage power station projects have definite delay grid connection conditions, and due to factors such as self-discharge of batteries and the like, the delay grid connection can cause the excessively low state of charge of the batteries in an energy storage system, so that the irreversible loss of the battery capacity is at risk. Therefore, the battery needs to be charged before grid connection.
The alternating-current side voltage of the energy storage variable-current system configured by the large energy storage system is usually 480V, 550V, 690V, 800V, 900V and the like, the alternating-current side voltages provided by different power grids are different, the voltage application range of the conventional power supply system is limited, the compatibility of the system with different types of battery boxes is low, and the system expansion is poor.
Disclosure of Invention
The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the energy storage and power supply system provided by the utility model can be adapted to different voltages, is compatible with various battery boxes, and has good dilatability.
The utility model provides an energy storage and electricity supplementing system, which comprises:
the power distribution system is used for connecting an external power supply end;
the energy storage conversion system comprises a plurality of DC/AC converters, and is electrically connected with the power distribution system;
the controller is electrically connected with the power distribution system and the energy storage variable current system, the controller is used for controlling the plurality of DC/AC converters to supplement power for the plurality of battery clusters of the energy storage system, and the DC/AC converters are electrically connected with the battery clusters.
According to the energy storage and electricity supplementing system, the wood system configuration of the energy storage and current transformation system is adopted, the requirements of grid-connected charging and discharging of alternating current sides with different voltages are met, meanwhile, a plurality of DC/AC converters are connected in parallel, good capacity expansion is achieved, electricity supplementing can be conducted on the energy storage systems with different battery clusters, various battery boxes are compatible, electricity supplementing is conducted on the different energy storage systems, electric quantity loss of the energy storage systems is reduced, economic benefits of a power station are improved, maintenance period is prolonged, and maintenance cost is reduced.
According to one embodiment of the utility model, the controller is configured to be communicatively coupled to the plurality of battery clusters, and the controller is configured to obtain state of charge data for the plurality of battery clusters.
According to one embodiment of the utility model, the controller is communicatively coupled to the plurality of battery clusters via a CAN bus.
According to one embodiment of the utility model, the controller is communicatively coupled to the plurality of battery clusters via a daisy chain.
According to one embodiment of the present utility model, further comprising:
and the switch is respectively in communication connection with the controller, the plurality of DC/AC converters and the plurality of battery clusters.
According to one embodiment of the utility model, the switch is communicatively coupled to the controller, the plurality of DC/AC converters, and the plurality of battery clusters, respectively, via ethernet.
According to one embodiment of the present utility model, further comprising:
the tool structure is used for limiting an accommodating space, and the power distribution system, the controller and the energy storage variable flow system are arranged in the accommodating space.
According to one embodiment of the utility model, the energy storage and compensation system comprises a constant voltage operation mode, the DC/AC converter is used for being connected with a switch box of the battery cluster, the energy storage and compensation system operates in the constant voltage operation mode, and the switch box operates in a constant power mode.
According to one embodiment of the utility model, the controller is configured to control the start-stop and output power of each of the DC/AC converters.
According to one embodiment of the present utility model, the controller includes a monitoring unit for monitoring state of charge values of the plurality of battery clusters, and the controller is configured to control the DC/AC converters corresponding to the battery clusters to stop power output if the monitoring unit determines that the state of charge value of the battery cluster reaches a target state of charge value.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic diagram of an energy storage and compensation system according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of an energy storage and supply system and an energy storage system according to an embodiment of the present utility model;
FIG. 3 is a second schematic diagram of an energy storage system and an energy storage system according to an embodiment of the present utility model;
reference numerals:
the system comprises an energy storage and supplementing system 100, a DC/AC converter 110, a controller 120, a switch 130, a tooling structure 140, an energy storage system 200, a battery cluster 210 and a generator set 300.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.
An energy storage and compensation system 100 according to an embodiment of the present utility model is described below with reference to fig. 1-3.
The energy storage and power supplementing system 100 according to the embodiment of the present utility model is a device for supplementing power to the energy storage system 200, and the energy storage and power supplementing system 100 may supplement power to the plurality of battery clusters 210 of the energy storage system 200 before the energy storage system 200 is connected to the grid.
As shown in fig. 1, the energy storage and replacement system 100 includes a power distribution system, an energy storage and conversion system, and a controller 120.
The power distribution system is used for connecting an external power supply end, and the power distribution system provides electric energy for the energy storage and supplementing system 100 to supplement electricity to the energy storage system 200.
In practical implementation, the external power supply terminal may be a power grid or a generator set 300, and the external power supply terminal may provide power sources with different voltage magnitudes of 400V, 480V, 550V, and the like.
In this embodiment, the energy storage conversion system includes a plurality of DC/AC inverters 110, and the energy storage conversion system is electrically connected to the power distribution system.
The DC/AC converter 110 is a power conversion device that converts DC power and AC power, and in this embodiment, the energy storage conversion system is electrically connected to the power distribution system, and the DC/AC converter 110 can convert power supplied from the power distribution system.
In practice, the plurality of DC/AC converters 110 of the energy storage conversion system may be electrically connected to the power distribution system, respectively, i.e. the plurality of DC/AC converters 110 of the energy storage conversion system are connected in parallel.
The building block system configuration of the plurality of DC/AC converters 110 in the energy storage converter system not only can meet the grid-connected charging and discharging requirements of alternating current sides with different voltages, but also has good capacity expansion, and the access number of the DC/AC converters 110 can be adjusted according to the number of the battery clusters 210 of the energy storage system 200.
The controller 120 is electrically connected to the power distribution system and the energy storage converter system, the controller 120 is configured to control the plurality of DC/AC converters 110 to supplement power to the plurality of battery clusters 210 of the energy storage system 200, and the DC/AC converters 110 are configured to be electrically connected to the battery clusters 210.
The controller 120 is a control center of the energy storage and power supplementing system 100, the controller 120 is electrically connected with the power distribution system and the energy storage and power conversion system, the DC/AC converters 110 are electrically connected with the battery clusters 210 when the energy storage system 200 is supplemented with power, and the controller 120 controls the plurality of DC/AC converters 110 in the energy storage and power conversion system to supplement power for the plurality of battery clusters 210 of the energy storage system 200.
For example, as shown in fig. 2, the energy storage and replenishment system 100 includes 4 DC/AC converters 110, and the DC/AC converters 110 are electrically connected to the battery clusters 210 to replenish the 4 battery clusters 210 in the energy storage system 200.
According to the energy storage and power supplementing system 100 provided by the embodiment of the utility model, through the configuration of the wood-type system of the energy storage and power conversion system, the requirements of grid-connected charging and discharging of alternating current sides with different voltages are met, meanwhile, a plurality of DC/AC converters 110 are connected in parallel in a plurality of machines, good capacity expansion is achieved, the energy storage and power supplementing system 200 with different battery clusters 210 can be subjected to power supplementing, various battery boxes are compatible, the power supplementing of the different energy storage systems 200 is facilitated, the electric quantity loss of the energy storage system 200 is reduced, the economic benefit of a power station is improved, the maintenance period is prolonged, and the maintenance cost is reduced.
In some embodiments, the controller 120 is configured to communicatively couple with the plurality of battery clusters 210, and the controller 120 is configured to obtain state of charge data for the plurality of battery clusters 210.
In this embodiment, when the energy storage and recharging system 100 supplements the energy storage system 200, the controller 120 of the energy storage and recharging system 100 is communicatively connected to the plurality of battery clusters 210 of the energy storage system 200, and the controller 120 may obtain the state of charge data of the plurality of battery clusters 210 of the energy storage system 200.
In actual implementation, the controller 120 may adjust the charging and recharging strategy of each battery cluster 210 according to the state of charge data of the plurality of battery clusters 210 of the energy storage system 200.
In some embodiments, the controller 120 is communicatively coupled to the plurality of battery clusters 210 via a CAN bus.
CAN is a short name of the controller 120 local area network (Controller Area Network), which is a serial communication network capable of realizing distributed real-time control.
In this embodiment, when the energy storage and recharging system 100 supplements the energy storage system 200, the controller 120 of the energy storage and recharging system 100 is communicatively connected to the plurality of battery clusters 210 of the energy storage system 200 through the CAN bus, so as to obtain the state of charge data of the plurality of battery clusters 210.
The CAN bus has the advantages of strong instantaneity, long transmission distance, strong electromagnetic interference resistance, low cost and the like, adopts a two-wire serial communication mode, has strong error detection capability and CAN work in a high-noise interference environment.
In some embodiments, the controller 120 is communicatively coupled to a plurality of battery clusters 210 via a daisy chain.
Daisy-chain communication is an emerging inter-module communication scheme within battery management systems that transmits signals in the form of current, often used for battery monitoring operating in a cascaded manner.
In this embodiment, when the energy storage and recharging system 100 supplements the energy storage system 200, the controller 120 of the energy storage and recharging system 100 is connected to the plurality of battery clusters 210 of the energy storage system 200 through daisy-chain communication, so as to obtain the state of charge data of the plurality of battery clusters 210.
The daisy chain communication has the advantages of low cost, high data synchronism and the like.
In some embodiments, the energy storage and replacement system 100 may also include a switch 130.
As shown in fig. 1, the switch 130 is communicatively coupled to the controller 120, the plurality of DC/AC inverters 110, and the plurality of battery clusters 210, respectively.
Switch 130 (Switch) means a "Switch" that is a network device for electrical (optical) signal forwarding that can provide a single shared electrical signal path for any two network nodes accessing Switch 130.
In this embodiment, the controller 120 may be communicatively connected to the plurality of DC/AC converters 110 and the plurality of battery clusters 210 through the switch 130, the controller 120 may transmit signals through the switch 130 to control the plurality of DC/AC converters 110 of the energy storage converter system, and the controller 120 may also transmit signals through the switch 130 to obtain information about the plurality of battery clusters 210 of the energy storage system 200.
In some embodiments, the switch 130 is communicatively coupled to the controller 120, the plurality of DC/AC inverters 110, and the plurality of battery clusters 210, respectively, via ethernet.
In some embodiments, the energy storage and repair system 100 may further include a tooling structure 140.
In this embodiment, the tooling structure 140 defines an accommodating space, and the power distribution system, the controller 120 and the energy storage and conversion system are disposed in the accommodating space.
In practical implementation, the power distribution system, the controller 120 and the energy storage and conversion system are disposed in the accommodating space of the tooling structure 140, so as to facilitate movement of the energy storage and conversion system 100.
In some embodiments, the tooling structure 140 may include a walking mechanism for driving the energy storage and power compensation system 100 to walk, assist the energy storage and power compensation system 100 to move, and supplement power to the energy storage system 200 at different geographic locations.
In some embodiments, the energy storage and makeup system 100 includes a constant voltage mode of operation, the DC/AC converter 110 is configured to interface with the switching box of the battery cluster 210, the energy storage and makeup system 100 operates in the constant voltage mode of operation, and the switching box operates in the constant power mode.
The switch box (SD shown in fig. 3) of the battery cluster 210 (RACK shown in fig. 3) is used to perform operations such as sampling data processing, monitoring of charge-discharge current and voltage, system on-off, and the like, and can communicate with the outside.
As shown in fig. 3, when the energy storage and compensation system 100 supplements power to the energy storage system 200, the generator set 300 provides power to the DC/AC converter 110, the DC/AC converter 110 performs power conversion, the DC/AC converter 110 is connected to the switch box of the battery cluster 210, the energy storage and compensation system 100 operates in a constant voltage operation mode, and the switch box operates in a constant power mode to supplement power to the energy storage system 200.
In some embodiments, the controller 120 is used to control the start-stop and output power of each DC/AC converter 110.
The energy storage converter system comprises a plurality of DC/AC converters 110, and the controller 120 can control the start and stop and output power of each DC/AC converter 110 in the plurality of DC/AC converters 110, and the energy storage converter system is configured in a building block type system, has good expansion and is suitable for different energy storage systems 200.
In some embodiments, the controller 120 further comprises a monitoring unit.
In this embodiment, the monitoring unit is configured to monitor the state of charge values of the plurality of battery clusters 210, and the controller 120 is configured to control the DC/AC converters 110 corresponding to the battery clusters 210 to stop the power output if the monitoring unit determines that the state of charge value of the battery cluster 210 reaches the target state of charge value.
In practical implementation, when the energy storage and recharging system 100 is used to recharge the energy storage system 200, a target state of charge value corresponding to each battery cluster 210 of the energy storage system 200 may be preset, and when the state of charge value of the battery cluster 210 reaches the target state of charge value, it indicates that the battery cluster 210 is already charged, and recharging is not required.
In this embodiment, the controller 120 may be communicatively connected to the plurality of battery clusters 210 to obtain real-time state of charge data of the plurality of battery clusters 210, and the controller 120 may also obtain real-time state of charge data of the plurality of battery clusters 210 in other manners.
The following describes embodiments of the energy storage and recharging system 100 to recharge the energy storage system 200.
As shown in fig. 2, the energy storage converter system and the controller 120 of the energy storage and supplementing system 100 are located in a tooling structure 140 convenient to move, the power distribution system is connected with an external power supply end of 400V or 480V alternating current, and the power of the energy storage converter system is 50kVA.
The energy storage system 200 includes a plurality of battery clusters 210, each battery cluster 210 having a variable battery capacity.
The energy storage and recharging system 100 operates in a constant voltage mode, and the switch box of the battery cluster 210 operates in a constant power mode, and each DC/AC converter 110 is started and stopped by the controller 120 and delivers power to each battery cluster 210 for recharging.
The state of charge data of each battery cluster 210 is monitored in real time by the controller 120, a charged target state of charge value is set on the controller 120, and when the state of charge value target state of charge value of the battery cluster 210 reaches the target state of charge value, charging is completed, charging is automatically stopped.
In this embodiment, through the configuration of the wood-type system of the energy storage converter system, the multiple DC/AC converters 110 are connected in parallel while adapting to the requirements of grid-connected charging and discharging of alternating current sides with different voltages, so that the capacity expansion performance is good, the power can be supplemented for the energy storage systems 200 with different battery clusters 210, various battery boxes are compatible, the power can be supplemented for different energy storage systems 200, the reduction of the electric quantity loss of the energy storage systems 200 is facilitated, the economic benefit of a power station is improved, the maintenance period is prolonged, and the maintenance cost is reduced.
The terms first, second and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged, as appropriate, such that embodiments of the present utility model may be implemented in sequences other than those illustrated or described herein, and that the objects identified by "first," "second," etc. are generally of a type, and are not limited to the number of objects, such as the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.
In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
In the description of the utility model, a "first feature" or "second feature" may include one or more of such features.
In the description of the present utility model, "plurality" means two or more.
In the description of the utility model, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by another feature therebetween.
In the description of the utility model, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. An energy storage and replenishment system, comprising:
the power distribution system is used for connecting an external power supply end;
the energy storage conversion system comprises a plurality of DC/AC converters, and is electrically connected with the power distribution system;
the controller is electrically connected with the power distribution system and the energy storage variable current system, the controller is used for controlling the plurality of DC/AC converters to supplement power for the plurality of battery clusters of the energy storage system, and the DC/AC converters are electrically connected with the battery clusters.
2. The energy storage and retrieval system according to claim 1, wherein the controller is configured to communicatively connect to the plurality of battery clusters, the controller being configured to obtain state of charge data for the plurality of battery clusters.
3. The energy storage and retrieval system according to claim 2, wherein the controller is communicatively coupled to the plurality of battery clusters via a CAN bus.
4. The energy storage and retrieval system according to claim 2, wherein the controller is communicatively coupled to the plurality of battery clusters via a daisy chain.
5. The energy storage and retrieval system according to claim 1, further comprising:
and the switch is respectively in communication connection with the controller, the plurality of DC/AC converters and the plurality of battery clusters.
6. The energy storage and retrieval system according to claim 5, wherein the switch is communicatively coupled to the controller, the plurality of DC/AC inverters, and the plurality of battery clusters, respectively, via an ethernet network.
7. The energy storage and retrieval system according to any one of claims 1-6, further comprising:
the tool structure is used for limiting an accommodating space, and the power distribution system, the controller and the energy storage variable flow system are arranged in the accommodating space.
8. The energy storage and makeup system according to any one of claims 1-6, wherein the energy storage and makeup system includes a constant voltage mode of operation, the DC/AC converter being configured to connect to a switch box of the battery cluster, the energy storage and makeup system operating in the constant voltage mode of operation, the switch box operating in a constant power mode.
9. The energy storage and retrieval system according to any one of claims 1 to 6, wherein the controller is configured to control the start-stop and output power of each of the DC/AC converters.
10. The energy storage and power supply system according to claim 9, wherein the controller includes a monitoring unit for monitoring state of charge values of the plurality of battery clusters, and the controller is configured to control the DC/AC converter corresponding to the battery cluster to stop power output if the monitoring unit determines that the state of charge value of the battery cluster reaches a target state of charge value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202320474604.4U CN219937966U (en) | 2023-03-08 | 2023-03-08 | Energy storage and electricity supplementing system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320474604.4U CN219937966U (en) | 2023-03-08 | 2023-03-08 | Energy storage and electricity supplementing system |
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| CN219937966U true CN219937966U (en) | 2023-10-31 |
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| CN202320474604.4U Active CN219937966U (en) | 2023-03-08 | 2023-03-08 | Energy storage and electricity supplementing system |
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