CN218940694U - Outdoor cabinet energy storage system - Google Patents
Outdoor cabinet energy storage system Download PDFInfo
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- CN218940694U CN218940694U CN202320026778.4U CN202320026778U CN218940694U CN 218940694 U CN218940694 U CN 218940694U CN 202320026778 U CN202320026778 U CN 202320026778U CN 218940694 U CN218940694 U CN 218940694U
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Abstract
The utility model provides an outdoor cabinet energy storage system, and belongs to the technical field of new energy storage equipment. The outdoor cabinet energy storage system comprises an energy storage cabinet box body, an energy storage converter, an alternating current/direct current distribution box and a plurality of battery plug boxes. The battery boxes are arranged in parallel and are connected in series in sequence, a bidirectional inverter and a pre-charging assembly are arranged in the energy storage converter, the battery boxes are connected with one end of the bidirectional inverter, and the other end of the bidirectional inverter is connected with an external alternating current three-phase power grid. The pre-charging assembly comprises an anode relay, a cathode relay and a pre-charging resistor. A battery management unit is arranged in the AC/DC distribution box, and a plurality of battery plug boxes, a bidirectional inverter and a pre-charging assembly are all electrically connected with the battery management unit. The problem that the arrangement and connection points of a high-voltage circuit are more, the failure risk is high and the integration level of an electrical system is low due to the defects of a battery plug box, a high-voltage box and a PCS configuration mode in the existing outdoor cabinet energy storage system can be solved.
Description
Technical Field
The utility model relates to the technical field of new energy storage equipment, in particular to an outdoor cabinet energy storage system.
Background
The outdoor cabinet energy storage system is a new development direction of new energy, and because the living standard of people is gradually improved, the demand of electric energy is continuously increased, the national carbon peak reaching policy is influenced, the electric energy is in shortage, and the inconvenience and the loss of life and production of vast people are caused, so the outdoor cabinet energy storage system is generated. The outdoor cabinet energy storage system perfectly solves the influence caused by the problem of short-term shortage of electric power, and when the electric power is sufficient, certain electric quantity can be stored through a battery; when the electric power is in shortage, the stored electric energy can be transmitted to a power grid, so that the peak regulation, frequency regulation and grid connection functions are realized. Meanwhile, according to the fact that the electricity price at night is lower than the electricity price at daytime, economic benefits brought by the fact that the outdoor energy storage system is charged at night and discharged at daytime can be achieved.
In the related art, in an energy storage cabinet body of an outdoor cabinet energy storage system, voltages after a plurality of battery plug boxes for charging and discharging are connected in series are directly input into a high-voltage box, and the high-voltage box is mainly used for controlling connection or disconnection of a main electric loop of the battery system, realizing pre-charging, charging and discharging and the like according to requirements and monitoring states of battery voltage, current, battery temperature and the like in the battery plug boxes in real time. The voltage is connected to PCS (Power Conversion System) under the action of control circuits such as a pre-charge circuit and a charge-discharge circuit in the high-voltage box, and then is converted into three-phase power 380V to the power grid through a bidirectional inverter in the PCS, so that grid connection is realized.
The outdoor cabinet energy storage system in the related art is adopted, the battery box is connected to the high-voltage box in series, and then the battery box is output to the PCS through the high-voltage box, so that the arrangement and connection points of the high-voltage circuit are more, the risk of failure of connection of individual parts exists, and the overall charge and discharge of the energy storage system are affected. And the battery plug-in box, the high-voltage box and the PCS are respectively arranged, so that the outdoor energy storage cabinet box body is required to have enough space, and the integration level of an electrical system is low.
Disclosure of Invention
The embodiment of the utility model provides an outdoor cabinet energy storage system, which can solve the problems of more arrangement and connection points of a high-voltage circuit, high failure risk and low integration level of an electrical system caused by the defects of a battery plug box, a high-voltage box and a PCS configuration mode in the existing outdoor cabinet energy storage system. The technical scheme is as follows:
the embodiment of the utility model provides an outdoor cabinet energy storage system, which comprises:
an energy storage cabinet body, an energy storage converter, an AC/DC distribution box and a plurality of battery plug boxes,
the energy storage converter, the AC/DC distribution box and the battery boxes are all arranged in the energy storage cabinet box body, the battery boxes are arranged in parallel and are sequentially connected in series, a bidirectional inverter and a pre-charging assembly are arranged in the energy storage converter, a positive pole line and a negative pole line which are connected in series of the battery boxes are connected with one end of the bidirectional inverter, the other end of the bidirectional inverter is connected with an external AC three-phase power grid, the pre-charging assembly comprises a positive pole relay, a negative pole relay and a pre-charging resistor, the positive pole relay is connected with the positive pole line, the negative pole relay is connected with the negative pole line, and the pre-charging resistor is connected between the positive pole relay and the negative pole relay;
the battery management unit is arranged in the AC/DC distribution box, and the battery plug boxes, the bidirectional inverter and the pre-charging assembly are all electrically connected with the battery management unit.
Optionally, isolation switches are arranged on the positive electrode line and the negative electrode line between the pre-charging assembly and the battery plug boxes, an alternating current switch is arranged on the line between the bidirectional inverter and the alternating current three-phase power grid, and the isolation switches and the alternating current switch are electrically connected with the battery management unit.
Optionally, a direct current fuse is arranged on the positive electrode line.
Optionally, a direct current EMC filter is arranged on a line between the bidirectional inverter and the isolating switch; an alternating-current EMC filter is arranged on a line between the bidirectional inverter and the alternating-current switch.
Optionally, a direct current lightning protection grounding end is arranged on the positive electrode line and the negative electrode line between the isolating switch and the pre-charging component, and an alternating current lightning protection grounding end is arranged on the line between the alternating current EMC filter and the alternating current switch.
Optionally, the outdoor cabinet energy storage system further comprises a liquid cooling assembly, the liquid cooling assembly comprises a liquid cooling unit, a liquid cooling water inlet pipe and a liquid cooling water outlet pipe, the liquid cooling unit is electrically connected with the battery management unit, a liquid cooling medium is stored in the liquid cooling unit, and the liquid cooling unit is connected with the liquid cooling plates in the battery plug boxes through the liquid cooling water inlet pipe and the liquid cooling water outlet pipe.
Optionally, the liquid cooling inlet tube includes first person in charge and a plurality of first branch pipe, the liquid cooling outlet pipe includes that the second is responsible for and a plurality of second branch pipe, the one end that first person in charge and second are responsible for with the liquid cooling unit is connected in the parallel arrangement direction of a plurality of battery subracks, first person in charge with the second is responsible for parallel interval set up in the both ends of a plurality of battery subracks, a plurality of first branch pipes with a plurality of second branch pipes with a plurality of battery subracks one-to-one, first branch pipe with the second branch pipe with the battery subrack of correspondence is connected.
Optionally, a partition board is arranged in the middle of the energy storage cabinet body, the battery plug boxes are arranged on one side of the partition board in parallel, and the energy storage converter, the ac/dc distribution box and the liquid cooling unit are arranged on the other side of the partition board.
Optionally, the outdoor cabinet energy storage system further comprises a fire-fighting assembly, the fire-fighting assembly comprises a plurality of fire-fighting medium nozzles arranged on the inner side wall of the energy storage cabinet box body, and the plurality of fire-fighting medium nozzles are electrically connected with the battery management unit.
Optionally, the fire-fighting medium nozzle is a perfluorinated hexanone nozzle.
The technical scheme provided by the embodiment of the utility model has the beneficial effects that at least:
compared with the traditional scheme in the related art, the outdoor cabinet energy storage system provided by the embodiment of the utility model omits the high-voltage box which is arranged between the battery plug box and the energy storage converter in series, integrates a pre-charging circuit for protecting the battery pack in the battery plug box in the energy storage converter in a pre-charging assembly mode, and is arranged on a direct-current line on the connection side of the bidirectional inverter and the battery plug boxes. The number of circuit arrangements and connection points between the battery plug boxes and the energy storage converters in the energy storage cabinet body is reduced, and the integration level is higher. The problem that the arrangement and connection points of a high-voltage circuit are more, the failure risk is high and the integration level of an electrical system is low due to the defects of a battery plug box, a high-voltage box and a PCS configuration mode in the existing outdoor cabinet energy storage system is solved while the precharge protection of battery packs in a plurality of battery plug boxes is realized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic top view of an energy storage system of an outdoor cabinet according to an embodiment of the present utility model;
fig. 2 is a topology circuit diagram of a main electrical appliance of an outdoor cabinet energy storage system provided by an embodiment of the utility model;
FIG. 3 is a partial structural circuit diagram of a priming assembly provided by an embodiment of the present utility model;
fig. 4 is a control structure block diagram of an outdoor cabinet energy storage system according to an embodiment of the present utility model.
In the figure:
1-an energy storage cabinet body; 2-an energy storage converter; 3-an AC/DC distribution box; 4-battery plug-in boxes; 5-liquid cooling assembly; 6-a fire assembly; 11-a separator; 21-a bi-directional inverter; 22-a priming assembly; 23-isolating switch; 24-alternating current switch; 25-direct current fuses; a 26-DC EMC filter; 27-ac EMC filters; 28-direct current lightning protection grounding end; 29-an alternating current lightning protection grounding end; 31-a battery management unit; 41-positive electrode line; 42-negative electrode line; 51-liquid cooling unit; 52-liquid cooling water inlet pipe; 53-liquid cooling water outlet pipe; 61-fire-fighting medium nozzle; 221-positive relay; 222-negative relay; 223-pre-charge resistor; 521-a first main pipe; 522-a first leg; 531-a second main pipe; 532-a second branch; m-ac three-phase network.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the embodiments of the present utility model will be described in further detail with reference to the accompanying drawings.
In the related art, in an energy storage cabinet body of an outdoor cabinet energy storage system, voltages after a plurality of battery plug boxes for charging and discharging are connected in series are directly input into a high-voltage box, and the high-voltage box is mainly used for controlling connection or disconnection of a main electric loop of the battery system, realizing pre-charging, charging and discharging and the like according to requirements and monitoring states of battery voltage, current, battery temperature and the like in the battery plug boxes in real time. The voltage is connected to PCS (Power Conversion System) under the action of control circuits such as a pre-charge circuit and a charge-discharge circuit in the high-voltage box, and then is converted into three-phase power 380V to the power grid through a bidirectional inverter in the PCS, so that grid connection is realized.
The outdoor cabinet energy storage system in the related art is adopted, the battery box is connected to the high-voltage box in series, and then the battery box is output to the PCS through the high-voltage box, so that the arrangement and connection points of the high-voltage circuit are more, the risk of failure of connection of individual parts exists, and the overall charge and discharge of the energy storage system are affected. And the battery plug-in box, the high-voltage box and the PCS are respectively arranged, so that the outdoor energy storage cabinet box body is required to have enough space, and the integration level of an electrical system is low.
Fig. 1 is a schematic top view of an energy storage system of an outdoor cabinet according to an embodiment of the present utility model. Fig. 2 is a topology circuit diagram of a main electrical appliance of an outdoor cabinet energy storage system provided by an embodiment of the utility model. Fig. 3 is a circuit diagram of a partial structure of a pre-charge assembly according to an embodiment of the present utility model. Fig. 4 is a control structure block diagram of an outdoor cabinet energy storage system according to an embodiment of the present utility model. As shown in fig. 1 to 4, in practice, the applicant provides an outdoor cabinet energy storage system comprising an energy storage cabinet housing 1, an energy storage converter 2, an ac/dc distribution box 3 and a plurality of battery sockets 4.
The energy storage converter 2, the AC/DC distribution box 3 and the battery plug boxes 4 are all arranged in the energy storage cabinet body 1, and the battery plug boxes 4 are arranged in parallel and are connected in series in sequence. The energy storage converter 2 is internally provided with a bidirectional inverter 21 and a pre-charging assembly 22, a positive electrode line 41 and a negative electrode line 42 which are connected in series with a plurality of battery plug boxes 4 are connected with one end of the bidirectional inverter 21, and the other end of the bidirectional inverter 21 is connected with an external alternating current three-phase power grid m. The pre-charge assembly 22 includes a positive electrode relay 221, a negative electrode relay 222, and a pre-charge resistor 223, the positive electrode relay 221 is connected with the positive electrode line 41, the negative electrode relay 222 is connected with the negative electrode line 42, and the pre-charge resistor 223 is connected between the positive electrode relay 221 and the negative electrode relay 222.
A battery management unit 31 is provided in the ac/dc distribution box 3, and the plurality of battery boxes 4, the bidirectional inverter 21, and the precharge module 22 are electrically connected to the battery management unit 31.
In the embodiment of the utility model, the outdoor cabinet energy storage system accommodates and stores a plurality of battery boxes 4 through an energy storage cabinet box body 1, each battery box 4 is internally provided with a battery pack for charging and discharging, the battery packs in the battery boxes 4 are sequentially connected in series, and the head end and the tail end of the battery pack are connected with one end of a bidirectional inverter 21 positioned in an energy storage converter 2 through a positive electrode line 41 and a negative electrode line 42. The other end of the bidirectional inverter 21 is connected to an external alternating current three-phase power grid m, and a charging and discharging circuit is integrally formed. When the electric power is sufficient, the electricity utilization device utilizes an alternating current three-phase power grid m to directly supply power, 380V voltage is input into the energy storage converter 2, high-voltage alternating current passing through the bidirectional inverter 21 is converted into direct current, and the direct current is output from the other side to the plurality of battery plug boxes 4. Before that, the battery management unit 31 controls the positive relay 221 and the negative relay 222 in the pre-charging assembly 22 to be turned on, so that the pre-charging resistor 223 and the battery boxes 4 are connected in parallel, and the pre-charging resistor 223 is used to split the current, so that the battery packs in the battery boxes 4 are prevented from being damaged due to direct impact of high current in the process of charging the battery packs in the battery boxes 4. When the electric power is short, the direct current in the battery plug boxes 4 can be input into the energy storage converter 2, and the high-voltage alternating current converted into 380V by the bidirectional inverter 21 is output only to the alternating current three-phase power grid, so as to temporarily supply power for the electricity utilization device.
Compared with the traditional scheme in the related art, the outdoor cabinet energy storage system provided by the embodiment of the utility model omits a high-voltage box arranged in series between the battery plug-in box 4 and the energy storage converter 2, and integrates a pre-charging circuit for protecting battery packs in the battery plug-in box 4 into the energy storage converter 2 in the form of a pre-charging component 22 and is arranged on a direct-current line on the connection side of the bidirectional inverter 21 and the plurality of battery plug-in boxes 4. The number of circuit arrangement and connection points between the battery plug box 4 and the energy storage converter 2 in the energy storage cabinet body 1 is reduced, and the integration level is higher. The problem that the arrangement and connection points of a high-voltage circuit are more, the failure risk is high and the integration level of an electrical system is low due to the defects of a battery plug box, a high-voltage box and a PCS configuration mode in the existing outdoor cabinet energy storage system is solved while the precharge protection of the battery packs in the plurality of battery plug boxes 4 is realized.
Optionally, a disconnecting switch 23 is disposed on a positive pole line 41 and a negative pole line 42 between the pre-charging assembly 22 and the plurality of battery boxes 4, an ac switch 24 is disposed on a line between the bidirectional inverter 21 and the ac three-phase grid m, and the disconnecting switch 23 and the ac switch 24 are electrically connected with the battery management unit 31. Illustratively, in the embodiment of the present utility model, the isolating switch 23 and the ac switch 24 are normally in a normally closed conductive state, so as to achieve connection conduction between the energy storage converter 2 and the battery boxes 4 and the ac three-phase power grid m, and achieve charging and discharging of the battery packs in the plurality of battery boxes 4. When the electric power is sufficient, or the outdoor cabinet energy storage system works for a long time and then is maintained and overhauled regularly, the isolating switch 23 and/or the alternating current switch 24 can be disconnected according to actual conditions, so that the power outage among the battery plug box 4, the energy storage converter 2 and the alternating current three-phase power grid m can be realized.
Optionally, a dc fuse 25 is provided on the positive line 41. In the embodiment of the present utility model, by disposing the dc fuse 25 on the positive electrode line 41, when the current in the dc side circuit after the conversion by the bidirectional inverter 21 exceeds the threshold value of normal operation, the dc fuse 25 will break due to the heat generated by itself, so that the circuit between the battery boxes 4 and the energy storage converter 2 is disconnected, further protecting the battery pack in the battery boxes 4, and improving the working safety of the energy storage system of the outdoor cabinet.
Optionally, a direct current EMC filter 26 is arranged on the line between the bi-directional inverter 21 and the isolating switch 23; an ac EMC filter 27 is provided on the line between the bi-directional inverter 21 and the ac switch 24. Illustratively, in the embodiment of the present utility model, by providing the dc EMC filter 26 on the dc line on one side of the bidirectional inverter 21 and providing the ac EMC filter 27 on the ac line on the other side of the bidirectional inverter 21, during the process of charging and discharging the battery pack in the battery box 4, the strong electromagnetic interference and the spark interference inside the energy storage cabinet 1 and around the site can be suppressed and eliminated by the dc EMC filter 26 and the ac EMC filter 27, so that the operation of the energy storage converter 2 and the battery management unit 31 in the ac/dc power distribution box 3 can be ensured to be safe and reliable, and the working safety of the outdoor cabinet energy storage system is further improved.
Optionally, a dc lightning protection ground 28 is provided on the positive line 41 and the negative line 42 between the isolating switch 23 and the pre-charging assembly 22, and an ac lightning protection ground 29 is provided on the line between the ac EMC filter 27 and the ac switch 24. Illustratively, in the embodiment of the present utility model, since the energy storage cabinet case 1 is disposed outdoors and is affected by lightning strike weather, by disposing the dc lightning protection grounding terminal 28 and the ac lightning protection grounding terminal 29 in the dc circuit and the ac circuit on both sides of the bidirectional inverter 21, respectively, grounding protection of the power transmission line is achieved, and it is ensured that each electrical component in the energy storage system of the outdoor cabinet and the battery pack in the battery box 4 can effectively prevent lightning strike, and stable operation of the energy storage system of the outdoor cabinet is ensured.
Optionally, the outdoor cabinet energy storage system further includes a liquid cooling assembly 5, the liquid cooling assembly 5 includes a liquid cooling unit 51, a liquid cooling water inlet pipe 52 and a liquid cooling water outlet pipe 53, the liquid cooling unit 51 is electrically connected with the battery management unit 31, a liquid cooling medium is stored in the liquid cooling unit 51, and the liquid cooling unit 51 is connected with the liquid cooling plates in the plurality of battery boxes 4 through the liquid cooling water inlet pipe 52 and the liquid cooling water outlet pipe 53. Illustratively, in the embodiment of the present utility model, the liquid cooling unit 51 may utilize the liquid cooling water inlet pipe 52 to input the liquid cooling medium into the liquid cooling plate in the corresponding battery box 4 for heat exchange with the battery pack according to the information such as the working temperature of the battery pack in each battery box 4 collected by the battery management unit 31 in real time, and the liquid cooling water outlet pipe 53 is used for recovering the liquid cooling medium to realize liquid cooling circulation, so that the battery pack can perform charge and discharge operations at a proper temperature, and the service life of the lithium ion battery in the battery is prolonged. Compared with the prior art that the fan is arranged corresponding to the battery plug box 4 in the energy storage system of the traditional outdoor cabinet, the air cooling heat dissipation mode is adopted, the heat dissipation effect is better, and the residual heat in the battery plug box 4 and the energy storage cabinet box body 1 can be taken away more rapidly.
Alternatively, the liquid cooling water inlet pipe 52 includes a first main pipe 521 and a plurality of first branch pipes 522, the liquid cooling water outlet pipe 53 includes a second main pipe 531 and a plurality of second branch pipes 532, one ends of the first main pipe 521 and the second main pipe 531 are connected to the liquid cooling unit 51, the first main pipe 521 and the second main pipe 531 are disposed at two ends of the plurality of battery boxes 4 at parallel intervals in the parallel arrangement direction of the plurality of battery boxes 4, the plurality of first branch pipes 522 and the plurality of second branch pipes 532 are in one-to-one correspondence with the plurality of battery boxes 4, and the first branch pipes 522 and the second branch pipes 532 are connected to the corresponding battery boxes 4. Illustratively, in the embodiment of the present utility model, the first main pipe 521 and the second main pipe 531 are disposed at both ends of the plurality of battery boxes 4 in parallel at intervals, and are correspondingly connected to the plurality of battery boxes 4 through the corresponding plurality of first branch pipes 522 and the plurality of second branch pipes 532. When realizing carrying out the supply of liquid cooling medium to every battery subrack 4, the pipeline arrangement space in the rational distribution energy storage cabinet box 1 reduces the whole occupation volume of pipeline, and convenient setting has improved outdoor cabinet energy storage system's practicality.
Optionally, a partition plate 11 is arranged in the middle of the energy storage cabinet body 1, a plurality of battery boxes 4 are arranged on one side of the partition plate 11 in parallel, and the energy storage converter 2, the ac/dc distribution box 3 and the liquid cooling unit 51 are arranged on the other side of the partition plate 11. In the embodiment of the utility model, the energy storage converter 2, the ac/dc distribution box 3, the liquid cooling unit 51 and other electric control equipment are separated from the battery boxes 4 by arranging the partition 11 made of fireproof materials in the middle of the energy storage cabinet body 1, so that when a thermal runaway accident occurs in the battery boxes 4, the fire can be extinguished in time, the safety of the energy storage converter 2, the ac/dc distribution box 3, the liquid cooling unit 51 and other electric control equipment can be ensured, and the loss is reduced.
Optionally, the outdoor cabinet energy storage system further includes a fire fighting assembly 6, the fire fighting assembly 6 includes a plurality of fire fighting medium nozzles 61 disposed on an inner sidewall of the energy storage cabinet housing 1, and the plurality of fire fighting medium nozzles 61 are electrically connected with the battery management unit 31. For example, in the embodiment of the present utility model, when the working temperature of the battery pack in each battery box 4 collected by the battery management unit 31 in real time exceeds the standard, and a thermal runaway accident occurs, the plurality of fire-fighting medium nozzles 61 located on the inner side wall of the tank body 1 of the energy storage cabinet are controlled to spray fire-fighting medium, such as perfluoro-hexanone, toward the battery box 4 for effective fire extinguishing, cooling and afterburning inhibition, so as to reduce the loss caused by the thermal runaway accident.
Illustratively, in the present examples, the perfluorohexanone is a liquid at room temperature because it has a heat of vaporization of only 1/25 of that of water and a vapor pressure of 25 times that of water. These properties make it easy to evaporate and exist in a gaseous state, and a good extinguishing effect can be achieved by absorbing heat. Meanwhile, the perfluoro-hexanone has almost no corrosiveness to traditional metals so as to effectively extinguish fire, reduce temperature and inhibit reburning, and reduce the damage of the lithium ion battery to the maximum extent.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs. The terms "first," "second," and the like in the description and in the claims, are not used for any order, quantity, or importance, but are used for distinguishing between different elements. Likewise, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of one of the components. The word "comprising" or "comprises", and the like, is intended to mean that elements or items that are present in front of "comprising" or "comprising" are included in the word "comprising" or "comprising", and equivalents thereof, without excluding other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to denote relative positional relationships, which may also change accordingly when the absolute position of the object to be described changes.
The foregoing description of the preferred embodiments of the present utility model is not intended to limit the utility model, but rather, the utility model is to be construed as limited to the appended claims.
Claims (10)
1. An outdoor cabinet energy storage system, comprising: an energy storage cabinet body (1), an energy storage converter (2), an alternating current/direct current distribution box (3) and a plurality of battery plug boxes (4),
the energy storage converter (2), the alternating current/direct current distribution box (3) and the battery plug boxes (4) are all arranged in the energy storage cabinet body (1), the battery plug boxes (4) are arranged in parallel and are sequentially connected in series, a bidirectional inverter (21) and a pre-charging component (22) are arranged in the energy storage converter (2), a positive pole line (41) and a negative pole line (42) which are connected in series by the battery plug boxes (4) are connected with one end of the bidirectional inverter (21), the other end of the bidirectional inverter (21) is connected with an external alternating current three-phase power grid (m), the pre-charging component (22) comprises a positive pole relay (221), a negative pole relay (222) and a pre-charging resistor (223), the positive pole relay (221) is connected with the positive pole line (41), the negative pole relay (222) is connected with the negative pole line (42), and the pre-charging resistor (223) is connected between the positive pole relay (221) and the negative pole relay (222).
The alternating current/direct current power distribution box (3) is internally provided with a battery management unit (31), and the battery plug boxes (4), the bidirectional inverter (21) and the pre-charging assembly (22) are electrically connected with the battery management unit (31).
2. The outdoor cabinet energy storage system according to claim 1, wherein a disconnecting switch (23) is provided on the positive pole line (41) and the negative pole line (42) between the pre-charging assembly (22) and the plurality of battery boxes (4), an ac switch (24) is provided on a line between the bidirectional inverter (21) and the ac three-phase grid (m), and both the disconnecting switch (23) and the ac switch (24) are electrically connected with the battery management unit (31).
3. An outdoor cabinet energy storage system according to claim 2, characterized in that a dc fuse (25) is arranged on the positive line (41).
4. The outdoor cabinet energy storage system according to claim 2, characterized in that a direct current EMC filter (26) is arranged on the line between the bi-directional inverter (21) and the disconnector (23); an alternating-current EMC filter (27) is arranged on a line between the bidirectional inverter (21) and the alternating-current switch (24).
5. The outdoor cabinet energy storage system of claim 4, wherein a dc lightning protection ground (28) is provided on the positive line (41) and the negative line (42) between the isolation switch (23) and the pre-charging assembly (22), and an ac lightning protection ground (29) is provided on the line between the ac EMC filter (27) and the ac switch (24).
6. The outdoor cabinet energy storage system of any one of claims 1 to 5, further comprising a liquid cooling assembly (5), wherein the liquid cooling assembly (5) comprises a liquid cooling unit (51), a liquid cooling water inlet pipe (52) and a liquid cooling water outlet pipe (53), the liquid cooling unit (51) is electrically connected with the battery management unit (31), a liquid cooling medium is stored in the liquid cooling unit (51), and the liquid cooling unit (51) is connected with liquid cooling plates in the plurality of battery plug boxes (4) through the liquid cooling water inlet pipe (52) and the liquid cooling water outlet pipe (53).
7. The outdoor cabinet energy storage system according to claim 6, wherein the liquid cooling water inlet pipe (52) comprises a first main pipe (521) and a plurality of first branch pipes (522), the liquid cooling water outlet pipe (53) comprises a second main pipe (531) and a plurality of second branch pipes (532), one ends of the first main pipe (521) and the second main pipe (531) are connected with the liquid cooling unit (51), in a parallel arrangement direction of the plurality of battery boxes (4), the first main pipe (521) and the second main pipe (531) are arranged at two ends of the plurality of battery boxes (4) at parallel intervals, the plurality of first branch pipes (522) and the plurality of second branch pipes (532) are in one-to-one correspondence with the plurality of battery boxes (4), and the first branch pipes (522) and the second branch pipes (532) are connected with the corresponding battery boxes (4).
8. The outdoor cabinet energy storage system according to claim 6, wherein a partition plate (11) is arranged in the middle of the energy storage cabinet body (1), the plurality of battery plug boxes (4) are arranged on one side of the partition plate (11) in parallel, and the energy storage converter (2), the ac/dc distribution box (3) and the liquid cooling unit (51) are arranged on the other side of the partition plate (11).
9. The outdoor cabinet energy storage system of any one of claims 1 to 5, further comprising a fire fighting assembly (6), the fire fighting assembly (6) comprising a plurality of fire fighting medium nozzles (61) disposed on an inner sidewall of the energy storage cabinet housing (1), the plurality of fire fighting medium nozzles (61) being electrically connected with the battery management unit (31).
10. An outdoor cabinet energy storage system according to claim 9, wherein the fire fighting medium nozzle (61) is a perfluoro hexanone nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320026778.4U CN218940694U (en) | 2023-01-04 | 2023-01-04 | Outdoor cabinet energy storage system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320026778.4U CN218940694U (en) | 2023-01-04 | 2023-01-04 | Outdoor cabinet energy storage system |
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| CN218940694U true CN218940694U (en) | 2023-04-28 |
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| CN202320026778.4U Active CN218940694U (en) | 2023-01-04 | 2023-01-04 | Outdoor cabinet energy storage system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117080661A (en) * | 2023-08-29 | 2023-11-17 | 广州星翼智慧能源技术有限公司 | Energy storage container system |
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2023
- 2023-01-04 CN CN202320026778.4U patent/CN218940694U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117080661A (en) * | 2023-08-29 | 2023-11-17 | 广州星翼智慧能源技术有限公司 | Energy storage container system |
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