Energy storage system

Abstract

The utility model is suitable for the technical field of energy storage, and provides an energy storage system. The energy storage system comprises a plurality of battery packs, a plurality of converters, a plurality of transformers and a controller; and the controller is in communication connection with each battery pack, each converter and each transformer. According to the energy storage system disclosed by the utility model, the controller is in communication connection with each battery pack, each converter and each transformer, so that each battery pack, each converter and each transformer can be controlled through one controller; the energy storage system controlled by only one controller provided by the invention is low in complexity, low in operation and maintenance difficulty and low in controller replacement difficulty, and different controllers do not need to be matched, so that the convenience of the energy storage system is improved.

Description

Technical Field

[0001] This application belongs to the technical field of energy storage, and particularly relates to an energy storage system. Background Art

[0002] Existing energy storage systems usually have a multi-level topology structure. In an energy storage system with a multi-level topology structure, there are usually multiple levels of controllers, and the controllers at different levels and / or the controllers at the same level are not independent of each other.

[0003] Since the controllers in the existing energy storage system are not independent of each other, the existing energy storage system has high complexity, high operation and maintenance difficulty, high difficulty in replacing the controllers, and a large workload for matching different controllers. It can be seen that the existing energy storage system has poor convenience. Summary of the Invention

[0004] In view of this, embodiments of this application provide an energy storage system to solve the technical problem of poor convenience of the energy storage system in the existing technology.

[0005] In a first aspect, embodiments of this application provide an energy storage system, including a plurality of battery packs, a plurality of inverters, a plurality of transformers, and a controller; the controller is communicatively connected to each of the battery packs, each of the inverters, and each of the transformers respectively.

[0006] Optionally, there is a connection relationship between the plurality of battery packs and the plurality of inverters, and there is a connection relationship between the plurality of inverters and the plurality of transformers.

[0007] Optionally, the energy storage system further includes a communication bus; the controller is communicatively connected to each of the battery packs, each of the inverters, and each of the transformers through the communication bus.

[0008] Optionally, the energy storage system further includes a power bus; the power bus is connected to each of the inverters, or the power bus is connected to each of the transformers.

[0009] Optionally, the energy storage system further includes a power output interface; the power output interface is connected to the power bus.

[0010] Optionally, the energy storage system further includes a plurality of DC / DC converters; the plurality of DC / DC converters are connected between the plurality of battery packs and the plurality of inverters and are communicatively connected to the controller.

[0011] Optionally, the energy storage system further includes a temperature regulation system; the temperature regulation system is communicatively connected to the controller.

[0012] Optionally, the energy storage system further includes a fire protection system; the fire protection system is communicatively connected to the controller.

[0013] Optionally, the energy storage system further includes a lighting system; the lighting system is communicatively connected to the controller.

[0014] Optionally, the energy storage system further includes a ventilation system; the ventilation system is communicatively connected to the controller.

[0015] The energy storage system provided by the embodiment of the present application has the following beneficial effects:

[0016] The energy storage system provided by the embodiment of the present application includes a plurality of battery packs, a plurality of inverters, a plurality of transformers, and a controller; the controller is communicatively connected to each battery pack, each inverter, and each transformer respectively. The energy storage system of the present application is communicatively connected to each battery pack, each inverter, and each transformer respectively through one controller, so that each battery pack, each inverter, and each transformer can be controlled by one controller. Compared with the existing energy storage system using multiple-layer controllers for control, the energy storage system provided by the present application that only uses one controller for control has a lower complexity, a lower operation and maintenance difficulty, and a lower replacement difficulty of the controller, and there is no need to match different controllers, thus improving the convenience of the energy storage system. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic structural diagram of an energy storage system provided by an embodiment of the present application;

[0019] Figure 2 It is a schematic structural diagram of an energy storage system provided by another embodiment of the present application;

[0020] Figure 3 It is a schematic structural diagram of an energy storage system provided by still another embodiment of the present application;

[0021] Figure 4 It is a schematic structural diagram of an energy storage system provided by yet another embodiment of the present application. Detailed Embodiments

[0022] It should be noted that the terms used in the embodiments of the present application are only used to explain the specific embodiments of the present application, rather than to limit the present application. In the description of the embodiments of the present application, unless otherwise specified, "a plurality of" means two or more than two, "at least one", "one or more" means one, two or more than two. The terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0023] Reference to "one embodiment" or "some embodiments" etc. described in this specification means that a specific feature, structure or characteristic described in conjunction with the embodiment is included in one or more embodiments of the present application. Thus, the statements "in one embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments" etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in another way. The terms "comprise", "include", "have" and their variants all mean "including but not limited to", unless otherwise specifically emphasized in another way.

[0024] The embodiments of the present application provide an energy storage system. The energy storage system provided by the embodiments of the present application can control each device in the energy storage system (including several battery packs, several inverters, several transformers, etc.) through one controller. Therefore, there is no need to control each device in the energy storage system using a multi-layer controller as in the prior art, which can solve the problems of high complexity, high operation and maintenance difficulty, high replacement difficulty of the controller, and large workload of matching different controllers in the existing energy storage system, and finally improve the convenience of the energy storage system.

[0025] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of an energy storage system provided by the embodiments of the present application. As Figure 1 shown, the energy storage system 11 may include several battery packs 111, several inverters 112, several transformers 113, and one controller 114.

[0026] Among them, the controller 114 can be communicatively connected to each battery pack 111, each inverter 112, and each transformer 113 respectively.

[0027] Among them, there may be a connection relationship between several battery packs 111 and several inverters 112. There may be a connection relationship between several inverters 112 and several transformers 113.

[0028] In practical applications, the controller 114 can directly control each battery pack 111, each inverter 112, and each transformer 113. For example, the controller 114 can directly control a certain target battery pack among the respective battery packs 111, the controller 114 can also directly control a certain target inverter among the respective inverters 112, and the controller 114 can further directly control a certain target transformer among the respective transformers 113.

[0029] Exemplarily, the controller 114 can directly control the operating parameters of the target battery pack, or directly control the operation or shutdown of the target battery pack; the controller 114 can directly control the operating parameters of the target inverter, or directly control the operation or shutdown of the target inverter; the controller 114 can directly control the operating parameters of the target transformer, or directly control the operation or shutdown of the target transformer.

[0030] In practical applications, the controller 114 can also directly obtain information on each battery pack 111, each inverter 112, and each transformer 113. For example, the controller 114 can directly obtain information on a certain target battery pack among the respective battery packs 111, the controller 114 can also directly obtain information on a certain target inverter among the respective inverters 112, and the controller 114 can further directly obtain information on a certain target transformer among the respective transformers 113.

[0031] In practical applications, when a certain first target device among several battery packs 111, several inverters 112, and several transformers 113 in the energy storage system 11 fails, the controller only needs to control each second target device that has a power coupling with the failed target device, and there is no need to control the devices in the energy storage system 11 that do not have a power coupling with the failed target device.

[0032] Exemplarily, in the energy storage system 11, if battery pack A is connected to inverter B, and inverter B is connected to transformer C, if battery pack A fails, then the controller 114 can control inverter B and transformer C, and there is no need to control the devices in the energy storage system 11 that do not have a power coupling with the failed target device.

[0033] In practical applications, when the energy storage system 11 needs to adjust the system scale, such as when it is necessary to add a set of battery packs 111, a set of inverters 112, and a set of transformers 113, the controller only needs to establish a communication connection with the newly added battery packs 111, inverters 112, and transformers 113, and there is no need to control other devices in the energy storage system 11, so it will not affect the normal operation of other devices in the energy storage system 11.

[0034] In a possible implementation, the communication bus 115 can be used to establish communication connections between the controller 114 and each battery pack 111, each inverter 112, and each transformer 113.

[0035] Based on this, the energy storage system 11 may further include a communication bus 115. Among them, the communication bus 115 can be respectively communicatively connected to each battery pack 111, each inverter 112, each transformer 113, and the controller 114.

[0036] In practical applications, the information interaction between each battery pack 111, each inverter 112, and each transformer 113 and the controller 114 can be realized through the communication bus 115. That is, the controller 114 can control the target battery pack, the target inverter, or the target transformer through the communication bus 115, and the target battery pack, the target inverter, or the target transformer can also send information to the controller 114 through the communication bus 115.

[0037] Specifically, when the controller 114 needs to control the target battery pack, the controller 114 can send a control instruction and the address of the target battery pack to the communication bus 115 to instruct the communication bus 115 to send the control instruction to the target battery pack according to the address.

[0038] Specifically, when the target battery pack needs to send information to the controller 114, the target battery pack can send an instruction including the information to the communication bus 115 to instruct the communication bus 115 to send the information to the controller 114.

[0039] The energy storage system 11 may further include a power bus 116. In the embodiments of the present application, the power bus 116 can be connected to each transformer 113. It should be noted that if there is no transformer in the energy storage system, the power bus 116 can be connected to each inverter 112. Therefore, the power bus 116 can be connected to each inverter, or the power bus 116 can be connected to the transformer.

[0040] The power bus 116 is used to transmit electric energy. Specifically, the battery pack 111 can transmit electric energy to the inverter 112 for current conversion processing. After the inverter 112 completes the current conversion processing, it can transmit the electric energy to the transformer 113 for voltage conversion processing. After the transformer 113 completes the voltage conversion processing, it can transmit the electric energy to the power bus 116, so that the power bus 116 transmits the electric energy that has undergone current conversion processing and / or voltage conversion processing to the load device.

[0041] In a possible implementation, the energy storage system 11 may further include a power output interface 117. Among them, the power output interface 117 can be connected to the power bus 116.

[0042] The power output interface 117 is used to connect to a load device and transfer the electrical energy of the power bus 116 to the load device.

[0043] As can be seen from the above, the energy storage system provided by the embodiment of the present application includes a plurality of battery packs, a plurality of inverters, a plurality of transformers, and a controller; the controller is communicatively connected to each battery pack, each inverter, and each transformer respectively. The energy storage system of the present application is communicatively connected to each battery pack, each inverter, and each transformer through a single controller, so that each battery pack, each inverter, and each transformer can be controlled by a single controller. Compared with the existing energy storage system that uses multiple layers of controllers for control, the energy storage system provided by the present application that uses only one controller for control has lower complexity, lower operation and maintenance difficulty, and lower replacement difficulty of the controller, and there is no need to match different controllers, thus improving the convenience of the energy storage system.

[0044] Please refer to Figure 2 , Figure 2 which is a schematic structural diagram of an energy storage system provided by another embodiment of the present application. As shown in Figure 2 , the energy storage system 21 may include a DC / DC converter 211, a temperature regulation system 212, a fire protection system 213, a lighting system 214, and a ventilation system 215 compared with the energy storage system 11.

[0045] Among them, the DC / DC converter 211 is connected between a plurality of battery packs 111 and a plurality of inverters 112, that is, the DC / DC converter 211 is connected to a plurality of battery packs 111 and a plurality of inverters 112. In addition, the DC / DC converter 211 is also communicatively connected to the controller 114. Specifically, the DC / DC converter 211 is communicatively connected to the controller 114 through a communication bus 115, that is, the DC / DC converter 211 is communicatively connected to the communication bus 115.

[0046] The temperature regulation system 212, the fire protection system 213, the lighting system 214, and the ventilation system 215 are all communicatively connected to the controller 114.

[0047] Among them, the DC / DC converter 211 is used to convert the high-voltage direct current transmitted by the battery pack 111 into a low-voltage direct current and transfer the low-voltage direct current to the inverter 112.

[0048] Among them, the temperature regulation system 212 can be arranged in the energy storage system 21. The temperature regulation system 212 can be used to regulate the temperature in the energy storage system 21 according to the temperature regulation control signal sent by the controller 114. Exemplarily, the controller 114 can send a temperature reduction signal to the temperature regulation system 212. After receiving the temperature reduction signal, the temperature regulation system 212 can reduce the temperature in the energy storage system 21 by a preset method (such as outputting cold air).

[0049] In a possible implementation manner, the temperature regulation system 212 can include an air conditioner, a fan, a heater, etc.

[0050] Among them, the fire protection system 213 can be arranged in the energy storage system 21. The fire protection system 213 can be used to carry out fire protection on the energy storage system 21 according to the fire protection instruction sent by the controller 114. Exemplarily, the controller 114 can send a fire extinguishing instruction to the fire protection system 213. After receiving the fire extinguishing instruction, the fire protection system 213 can carry out fire extinguishing treatment on the energy storage system 21 by a preset method (such as releasing a fire extinguishing medium), where the fire extinguishing medium can include perfluoromethyl hexanone, fine water mist, etc.

[0051] Among them, the lighting system 214 can be arranged in the energy storage system 21. The lighting system 214 is used to illuminate the energy storage system 21 according to the lighting instruction sent by the controller 114, and the lighting system 214 is also used to stop illuminating the energy storage system 21 according to the light-off instruction sent by the controller 114.

[0052] In a possible implementation manner, the lighting system 214 can include several lamps. Among them, the number and type of the lamps can be set according to actual needs.

[0053] Among them, the ventilation system 215 can be arranged in the energy storage system 21. The ventilation system 215 is used to ventilate the energy storage system 21 according to the ventilation instruction sent by the controller 114, and the lighting system 214 is also used to stop ventilating the energy storage system 21 according to the stop ventilation instruction sent by the controller 114.

[0054] In a possible implementation manner, the ventilation system 215 can include an exhaust fan, an air inlet fan, or a controllable window, etc.

[0055] In practical applications, the packaging forms of the energy storage system can include container type and factory building type. The following gives examples of the container type energy storage system and examples of the factory building energy storage system.

[0056] Please refer to Figure 3 , Figure 3 which is a schematic structural diagram of an energy storage system provided by another embodiment of the present application, as Figure 3As shown, the energy storage system 31 is a containerized energy storage system.

[0057] Among them, the energy storage system 31 includes two containers, namely container 1 and container 2. Among them, container 1 can include 10 inverters (C1 to C10) with a power of 100 kW and 10 battery packs (B1 to B10) with a power of 200 kWh. Container 2 can include 10 inverters (C11 to C20) with a power of 100 kW and 10 battery packs (B11 to B20) with a power of 200 kWh.

[0058] Each of the inverters (C1 to C20) and each of the battery packs (B1 to B20) in container 1 and container 2 are respectively connected to the same control center.

[0059] In addition, the energy storage system 31 may further include a power bus, and the power bus is connected to each of the inverters (C1 to C20) in container 1 and container 2.

[0060] In addition, the energy storage system 31 may further include a fire protection system and an air conditioner. Container 1 and container 2 share the fire protection system and the air conditioner, and the fire protection system and the air conditioner can be respectively connected to the control center.

[0061] Please refer to Figure 4 , Figure 4 which is a schematic structural diagram of an energy storage system provided by another embodiment of the present application. As Figure 4 shown, the energy storage system 41 is a factory-style energy storage system.

[0062] Among them, in the energy storage system 41, it may include 1 transformer T with a power of 1250 kVA, 2 inverters C1 and C2 with a power of 500 kW, 20 DC / DC converters D1 - D20 with a power of 50 kW, 20 battery packs B1 - B20 with a power of 75 kWh, a communication bus, a control center, and a power bus.

[0063] Among them, the control center is connected to the communication bus. The control center is used to receive information sent by each device in the energy storage system 41 to the control center through the communication bus, and send information to each device in the energy storage system 41 through the communication bus.

[0064] The communication bus is respectively connected to the transformer T, the converters C1, C2, the DC / DC converters D1 - D20, and the battery packs B1 - B20. The communication bus is used to receive the information sent by the transformer T, the converters C1, C2, the DC / DC converters D1 - D20, and the battery packs B1 - B20, and send the received information to the control center. The communication bus is also used to receive the instructions sent by the control center and send the instructions sent by the control center to the transformer T, the converters C1, C2, the DC / DC converters D1 - D20, or the battery packs B1 - B20.

[0065] As can be seen from the above, the control centers in the energy storage systems 31 and 41 can directly control each device or directly receive the information sent by each device. Compared with the existing energy storage systems using multi - layer controllers for control, the energy storage systems 31 and 41 have lower complexity, lower operation and maintenance difficulty, and lower replacement difficulty of the controller, and there is no need to match different controllers, thus improving the convenience of the energy storage system.

[0066] In the above - mentioned embodiments, the descriptions of each embodiment have their own emphases. For the parts not detailed or recorded in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0067] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed in this text can be implemented by electronic hardware, or by a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of this application.

[0068] The above - mentioned embodiments are only used to illustrate the technical solutions of this application, not to limit them; although this application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of each embodiment of this application, and should all be included in the protection scope of this application.

Claims

1. An energy storage system, characterized in that, It includes a number of battery packs, a number of inverters, a number of transformers, and a controller; the controller is communicatively connected to each of the battery packs, each of the inverters, and each of the transformers respectively; The energy storage system further includes a communication bus; the controller is communicatively connected to each of the battery packs, each of the inverters, and each of the transformers through the communication bus.

2. The energy storage system according to claim 1, wherein There is a connection relationship between the number of battery packs and the number of inverters, and there is a connection relationship between the number of inverters and the number of transformers.

3. The energy storage system according to claim 1, characterized in that, The energy storage system further includes a power bus; the power bus is connected to each of the inverters, or the power bus is connected to each of the transformers.

4. The energy storage system according to claim 3, characterized in that, The energy storage system further includes a power output interface; the power output interface is connected to the power bus.

5. The energy storage system according to claim 1, characterized in that, The energy storage system further includes a number of DC / DC converters; the number of DC / DC converters are connected between the number of battery packs and the number of inverters, and are communicatively connected to the controller.

6. The energy storage system according to claim 1, wherein The energy storage system further includes a temperature regulation system; the temperature regulation system is communicatively connected to the controller.

7. The energy storage system according to claim 1, wherein The energy storage system further includes a fire protection system; the fire protection system is communicatively connected to the controller.

8. The energy storage system according to claim 1, characterized in that, The energy storage system further includes a lighting system; the lighting system is communicatively connected to the controller.

9. The energy storage system according to any one of claims 1 to 8, characterized in that, The energy storage system further includes a ventilation system; the ventilation system is communicatively connected to the controller.

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