Energy storage system and energy storage cabinet

Abstract

The utility model provides an energy storage system and an energy storage cabinet. The energy storage system comprises a high-voltage box which comprises an isolation switch; the energy storage converter comprises an inversion unit; and the isolating switch is connected in series in the positive pole branch and the negative pole branch of the high-voltage box and is connected with the inversion unit. Compared with a common energy storage system at present, according to the scheme, the isolation switch in the high-voltage box is connected with the inversion unit in the energy storage converter, repeated electrical parts on a direct-current loop are eliminated, wire harness connection between the high-voltage box and the energy storage converter is structurally reduced, the difficulty of electrical wiring and the wire harness cost are reduced, and the energy storage efficiency is improved. And meanwhile, the problem of compact internal layout is solved, so that the utilization rate of the internal space of the energy storage system can be increased.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage devices, and in particular to an energy storage system and an energy storage cabinet. Background Art

[0002] At present, the commonly used energy storage cabinet adopts an electrical solution in which the high-voltage box and the energy storage inverter are separated. Usually, the energy storage cabinet includes a battery cabinet, an intelligent control cabinet and a power cabinet, wherein the battery cabinet includes a high-voltage box and a heat dissipation system, and the power cabinet includes an energy storage inverter. And one end of the isolating switch in the high-voltage box is connected to one end of the current detection component in the energy storage inverter. On the basis of the separate installation of the high-voltage box and the energy storage inverter, and because the heat dissipation methods used by the two are usually different, the space layout required for the heat dissipation devices used by the two is different, which ultimately makes the space occupied by the separate structural design of the high-voltage box and the energy storage inverter larger, and the space utilization rate of the energy storage cabinet is low. Utility Model Content

[0003] The embodiments of the utility model provide an energy storage system and an energy storage cabinet, which can solve the problem of low space utilization of the above energy storage system.

[0004] In a first aspect, an embodiment of the utility model provides an energy storage system, which includes a high-voltage box, including an isolating switch; and an energy storage converter, including an inverter unit;

[0005] The isolating switch is connected in series to the positive branch and the negative branch of the high voltage box and is connected to the inverter unit.

[0006] In one embodiment, the high-voltage box includes a negative relay, a positive relay and a positive pre-charging circuit. The negative relay is connected in series in the negative branch of the high-voltage box, the positive relay is connected in series in the positive branch of the high-voltage box, and the positive pre-charging circuit is connected in parallel with the positive relay.

[0007] In one embodiment, the positive electrode pre-charging circuit includes a pre-charging relay and a pre-charging resistor, wherein the pre-charging relay is connected in series with the pre-charging resistor and then connected in parallel with the positive electrode relay.

[0008] In one embodiment, the high-voltage box further includes a fuse assembly, which is connected in series to the positive branch and the negative branch of the high-voltage box.

[0009] In one embodiment, the energy storage system includes an AC filter component and an AC relay component, and the AC relay component and the AC filter component are connected in series between the energy storage converter and the output end of the energy storage system.

[0010] In one embodiment, the energy storage system further includes a battery management system and a voltage conversion module, and the voltage conversion module is connected to the high voltage box, the battery management system and the output end of the energy storage converter.

[0011] In one embodiment, the energy storage system further includes a heat dissipation system.

[0012] In one embodiment, the heat dissipation system includes a terminal block, a heat conductive member, and a cooling module. The terminal block is connected to the heat conductive member, and the cooling module dissipates heat for the heat conductive member.

[0013] In one embodiment, the cooling module includes one or two of a fan, a coolant, and a cooling pipe.

[0014] In one embodiment, the cooling pipe is placed at the air inlet of the fan, and the air outlet of the fan is opposite to the position of the heat conducting element.

[0015] In a second aspect, an embodiment of the present utility model provides an energy storage cabinet, comprising the energy storage system of any one of the first aspect.

[0016] In the embodiment of the utility model, the isolating switch is connected in series to the positive branch and the negative branch of the high-voltage box, and connected to the inverter unit. Compared with the currently commonly used energy storage system, this solution eliminates the repeated electrical parts in the DC circuit by connecting the isolating switch in the high-voltage box with the inverter unit in the energy storage converter, reduces the wiring harness connection between the high-voltage box and the energy storage converter in structure, reduces the difficulty of electrical wiring and the wiring harness cost, and also solves the problem of compact internal layout, so that this solution can increase the utilization rate of the internal space of the energy storage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a circuit structure diagram of an energy storage system in the related art;

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

[0020] Description of reference numerals:

[0021] 1000, high-voltage box; 2000, energy storage converter; 1010, first current detection component; 1020, first fuse component; 1030, first relay component; 1040, first isolating switch; 1050, first positive pre-charging circuit; 2010, second current detection component; 2020, second fuse component; 2030, second relay component; 2040, second isolating switch; 2050, second positive pre-charging circuit; 2060, inverter unit; 2070, battery management system; 2080, voltage conversion module; 2090, miniature circuit breaker assembly; 3010, passive filter assembly; 3020, AC relay assembly; 3030, AC filter assembly; 3040, AC lightning protection assembly; 3050, output end; 3060, Hall sensor; 3070, negative relay; 3080, positive relay; 3090, positive pre-charging circuit; 4000, first box; 4010, heat conductor; 4020, cooling module; 5000, second box. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the utility model, and are not used to limit the utility model. In the utility model, unless otherwise stated, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0023] In the description of the present application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of the present application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0024] In this application, the word "exemplary" is used to mean "used as an example, illustration, or description." Any embodiment described in this application as "exemplary" is not necessarily to be construed as being preferred or advantageous over other embodiments. The following description is given to enable any technician in the field to implement and use the present application. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the present application can be implemented without using these specific details. In other instances, well-known structures and processes will not be elaborated in detail to avoid obscuring the description of the present application with unnecessary details. Therefore, the present application is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles and features disclosed in the present application.

[0025] Please refer to Figure 1 , Figure 1 The energy storage system includes a high-voltage box 1000 and an energy storage converter 2000. The high-voltage box 1000 includes a Hall sensor 3060, a first fuse assembly 1020, a first relay assembly 1030 and a first isolating switch 1040 connected in series on the positive branch of the high-voltage box 1000 and the negative branch of the high-voltage box 1000, and also includes a first positive pre-charging circuit 1050 connected in series on the positive branch of the high-voltage box 1000. The energy storage inverter 2000 part includes a second current detection component 2010, a second fuse component 2020, a second relay component 2030, a second isolating switch 2040, and a second positive pre-charging circuit 2050 connected in series on the positive branch of the energy storage inverter 2000, and also includes an inverter unit 2060, a battery management system 2070, a voltage conversion module 2080, a miniature circuit breaker component 2090, a passive filter component 3010, an AC relay component 3020, an AC filter component 3030, an AC lightning protection component 3040 and an output end 3050.

[0026] Among them, the first current detection component 1010 and the second current detection component 2010 are used to test the magnitude of the current in the circuit. The first fuse component 1020 and the second fuse component 2020 are used when the current in the circuit is overloaded or short-circuited. At this time, the current value exceeds the rated current value of the fuse component. The fuse inside the fuse component is heated and melted to cut off the current to protect the electrical circuit or equipment. The first relay component 1030, the second relay component 2030 and the AC relay component 3020 are all used to control the switch of the circuit. When the relay is in an activated state, the circuit is closed, and when the relay is in an inactivated state, the circuit is disconnected. The first isolating switch component 1040 and the second isolating switch component 2040 are used for segmented inter-cluster circulation. The first positive pre-charge circuit 1050 and the second positive pre-charge circuit 2050 are used to control the current size at the moment of system startup. When the inter-cluster voltage is consistent or less than the set value, the pre-charge relays in the first positive pre-charge circuit 1050 and the second positive pre-charge circuit 2050 are disconnected. At this time, the relays connected in parallel with the first positive pre-charge circuit 1050 and the second positive pre-charge circuit 2050 are closed, connecting the system to the circuit in normal working state. The battery management system 2070 is used to monitor the battery status and perform protection control on the battery to prevent abnormal conditions such as overcharging, over-discharging, overcurrent and short circuit of the battery. The voltage conversion module 2080 is used to convert AC power into the DC voltage required by the battery management system 2070 to supply the battery management system 2070. The inverter unit 2060 is used to convert DC power into AC three-phase power. A single-phase power in the AC three-phase power is input to the voltage conversion module 2080 through the miniature circuit breaker assembly 2090 to supply power to the battery management system 2070. Passive filter component 3010 is used to filter signals within a specific frequency range, such as low-pass filter, high-pass filter, band-pass filter and band-stop filter, and the filtering effect of the signal is achieved by reasonably selecting the values ​​of passive components (such as resistors, inductors, capacitors). AC filter component 3030 is used to remove AC interference signals in the circuit. AC lightning protection component 3040 is used to protect electrical equipment and systems from lightning strikes and overvoltage. Output terminal 3050 is usually some load.

[0027] Please refer to Figure 2 , Figure 2 A schematic diagram of the structure of an energy storage system provided by an embodiment of the utility model. The energy storage system includes a high-voltage box 1000 and an energy storage converter 2000, and the high-voltage box 1000 is connected in series with the energy storage converter 2000. By connecting the high-voltage box 1000 and the energy storage converter 2000 in series, compared with the currently commonly used energy storage system, the present application structurally reduces the wiring harness connection between the high-voltage box 1000 and the energy storage converter 2000, reduces the difficulty of electrical wiring and the wiring harness cost, and also solves the problem of compact internal layout, thereby improving the utilization rate of the internal space of the energy storage system.

[0028] In some embodiments, the high voltage box 1000 includes: a negative electrode relay 3070, a positive electrode relay 3080, and a positive electrode pre-charging circuit 3090. The negative electrode relay 3070 is connected in series to the negative electrode branch of the high voltage box 1000, the positive electrode relay 3080 is connected in series to the positive electrode branch of the high voltage box 1000, and the positive electrode pre-charging circuit 3090 is connected in parallel to the positive electrode relay 3080. The negative electrode relay 3070 and the positive electrode relay 3080 are used to control the circuit switch, and the positive electrode pre-charging circuit 3090 is used to cooperate with the positive electrode relay 3080 to control the magnitude of the current in the circuit to protect the energy storage system.

[0029] Furthermore, the positive electrode pre-charging circuit 3090 includes: a pre-charging relay and a pre-charging resistor. The positive electrode pre-charging circuit 3090 can prevent the huge current generated at the moment of powering on the system from damaging the electronic equipment, thereby enhancing the safety of the circuit.

[0030] In some embodiments, the high voltage box 1000 further includes a first current detection component 1010. The first current detection component 1010 may be a Hall sensor or a shunt or other element for detecting the current size in a circuit loop, which is not limited here.

[0031] In some embodiments, the high-voltage box 1000 further includes: a first fuse assembly 1020 and a first isolating switch 1040. The first fuse assembly 1020 is connected in series to the positive branch and the negative branch of the high-voltage box 1000, and the first isolating switch 1040 is also connected in series to the positive branch and the negative branch of the high-voltage box 1000. The first fuse assembly 1020 is used when the current in the circuit is overloaded or short-circuited. At this time, the current value exceeds the rated current value of the fuse assembly. The fuse inside the fuse assembly is heated and melted to cut off the current to protect the electrical circuit or equipment. The first isolating switch 1040 assembly is used for segmented inter-cluster circulation. Before applying low voltage electricity, closing the first isolating switch 1040 can ensure that the equipment in the circuit is completely isolated from the power supply before the power is turned on, thereby providing a safe working environment.

[0032] Furthermore, the energy storage system further includes an AC filter component 3030 and an AC relay component 3020. The AC relay component 3020 and the AC filter component 3030 are connected in series between the energy storage inverter 2000 and the output terminal 3050 of the energy storage system. The AC filter component 3030 is used to filter out or weaken signals of a specific frequency in an AC circuit. Its main function is to remove stray interference, noise and harmonics in the power supply or signal, so that the output signal is more stable and pure, so as to improve the performance and stability of the circuit and reduce the impact of interference and noise on the system. The AC filter component 3030 in the embodiment of the present application scheme can be set to different AC filters according to different working scenarios, such as low-pass filters, high-pass filters, band-pass filters, etc., which are not limited here.

[0033] In some embodiments, the energy storage system further includes an inverter unit 2060. The inverter unit 2060 includes three output phases, which are respectively connected to three input terminals of the passive filter component 3010, and then respectively connected to the AC filter component 3030 through three AC relays in the AC relay component 3020. Figure 2 shown.

[0034] Furthermore, the energy storage system further includes a battery management system 2070 and a voltage conversion module 2080. The voltage conversion module 2080 is connected to the battery management system 2070 to provide the required DC voltage for the battery management system 2070. The voltage conversion module 2080 is connected to an output of the inverter unit 2060 through a miniature circuit breaker. The voltage conversion module 2080 shares a neutral line with the inverter unit 2060 and the passive filter. Figure 2 shown.

[0035] The battery management system 2070 is used to monitor, protect and manage the battery to ensure its safe and efficient operation, and the voltage conversion module 2080 is used to convert the household power supply into the low-voltage direct current required by the battery management system 2070. It should be noted that the voltage conversion module 2080 can also supply power to other electrical components that require low voltage (the connection relationship between them is not shown in the figure).

[0036] It should be noted that the "high-voltage box 1000 is connected in series with the energy storage inverter 2000" in the present application can reduce the use of the second current detection component 2010, the second fuse component 2020, the second relay component 2030, the second positive electrode pre-charging circuit 2050 and the second isolating switch 2040 in the energy storage inverter 2000 of the prior art, and connect the positive branch where the first isolating switch 1040 in the high-voltage box 1000 is located to the positive branch where the second current detection component 2010 in the energy storage inverter 2000 is located, and connect the negative branch where the first isolating switch 1040 in the high-voltage box 1000 is located to the negative branch where the second current detection component 2010 in the energy storage inverter 2000 is located. By utilizing the first positive electrode pre-charging circuit 1050, the first current detection component 1010, the first fuse component 1020, and the first isolating switch 1040 belonging to the high-voltage box 1000 component to monitor and protect the current in the circuit, the present application reduces the number of electrical components and saves the manufacturing cost of the energy storage system without affecting the original function. Secondly, it reduces the wiring harness connection between the high-voltage box 1000 and the energy storage inverter 2000, reduces the difficulty of electrical wiring, and also solves the problem of compact layout inside the original energy storage system, thereby increasing the utilization rate of the internal space of the energy storage system.

[0037] In some embodiments, please refer to Figure 2 The above energy storage system also includes a first box 4000 and a second box 5000 on the outside, as well as a heat dissipation system. The first box 4000 is used to protect the energy storage system, and the second box 5000 is used to place the energy storage system and the heat dissipation system. Different from the prior art, the heat dissipation system in the present application is a heat dissipation system shared by the high-voltage box 1000 and the energy storage inverter 2000, rather than two independent heat dissipation systems of the high-voltage box 1000 and the energy storage inverter 2000 in the prior art. Compared with two heat dissipation systems, the present application reduces the space occupied by the heat dissipation system on the basis of lowering the temperature of electrical components, thereby increasing the utilization rate of the internal space of the energy storage system.

[0038] Furthermore, the heat dissipation system includes a terminal row (not shown in the figure), a heat conductor 4010 and a cooling module 4020. The terminal row is connected to the heat conductor 4010, and the cooling module 4020 is located between the first box 4000 and the second box 5000, and is used to dissipate heat for the heat conductor 4010. Specifically, the terminal row is connected to the heating element in the energy storage system, and the heat emitted by the heating element is transferred to the heat conductor 4010 through heat transfer, and finally the cooling module 4020 dissipates heat for the heat conductor 4010.

[0039] In some embodiments, the cooling module 4020 includes one or two of a fan, a coolant, and a cooling pipe. That is, the cooling module 4020 can be any one of a fan, a coolant, a cooling pipe, a fan and a coolant, a fan and a cooling pipe, a coolant and a cooling pipe. Among them, the heat dissipation method including a fan and a cooling pipe is preferred. In the present application, when the cooling module 4020 includes a fan and a cooling pipe, according to the arrangement position of the electrical components inside the energy storage system, an air duct circulation is formed inside the energy storage system, and the cooling pipe is placed at the air inlet of the fan, and the air outlet of the fan is opposite to the position of the heat conductor 4010. It should be noted that the above examples are only for better illustrating the present application, and are not intended to limit the present application. The arrangement position of the cooling module 4020 can be set according to the specific situation.

[0040] The embodiment of the present application provides an energy storage system, which connects the isolating switch in series to the positive branch and the negative branch of the high-voltage box and is connected to the inverter unit. Compared with the currently commonly used energy storage system, the present application eliminates the repeated electrical parts in the DC circuit by connecting the isolating switch in the high-voltage box with the inverter unit in the energy storage converter, structurally reduces the wiring harness connection between the high-voltage box and the energy storage converter, reduces the difficulty of electrical wiring and the wiring harness cost, and also solves the problem of compact internal layout, so that the present solution can increase the utilization rate of the internal space of the energy storage system.

[0041] The embodiment of the utility model further provides an energy storage cabinet, which includes the above energy storage system. The energy storage cabinet has all the advantages of the above energy storage system, which will not be described in detail here.

[0042] The above is a detailed introduction to the embodiments of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for technicians in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. An energy storage system, characterized in that: The energy storage system comprises: High voltage box including disconnector; and An energy storage converter, including an inverter unit; The isolating switch is connected in series to the positive branch and the negative branch of the high voltage box, and is connected to the inverter unit.

2. The energy storage system according to claim 1, characterized in that: The high-voltage box comprises: A negative electrode relay, the negative electrode relay is connected in series in the negative electrode branch of the high voltage box; A positive relay, the positive relay is connected in series in the positive branch of the high-voltage box; A positive electrode pre-charging circuit is connected in parallel with the positive electrode relay.

3. The energy storage system according to claim 2, characterized in that: The positive electrode pre-charging circuit includes a pre-charging relay and a pre-charging resistor; Among them, the pre-charging relay is connected in series with the pre-charging resistor and then connected in parallel with the positive relay.

4. The energy storage system according to claim 1, characterized in that: The high-voltage box also includes a fuse assembly, which is connected in series to the positive branch and the negative branch of the high-voltage box.

5. The energy storage system according to claim 4, characterized in that: The energy storage system comprises an AC filter component and an AC relay component. The AC relay component and the AC filter component are connected in series between the energy storage converter and the output end of the energy storage system.

6. The energy storage system according to claim 5, characterized in that: The energy storage system further includes a battery management system and a voltage conversion module, wherein the voltage conversion module is connected to the high voltage box, the battery management system and the output end of the energy storage converter.

7. The energy storage system according to claim 1, characterized in that: The energy storage system also includes a heat dissipation system.

8. The energy storage system according to claim 7, characterized in that: The heat dissipation system includes a terminal block, a heat conducting member and a cooling module; The terminal row is connected to the heat conducting member, and the cooling module dissipates heat for the heat conducting member.

9. The energy storage system according to claim 8, characterized in that: The cooling module includes one or two of a fan, a coolant and a cooling pipe.

10. The energy storage system according to claim 9, characterized in that: The cooling pipe is placed at the air inlet of the fan, and the air outlet of the fan is opposite to the heat conducting member.

11. An energy storage cabinet, characterized in that: An energy storage system comprising any one of claims 1-10.

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