Dual-function energy storage high-voltage box

Abstract

This utility model discloses a two-in-one energy storage high-voltage box, including a housing. The housing includes a control panel, which is equipped with output positive and negative connectors, battery positive and negative connectors, and an operating handle. Inside the housing is a mounting base plate, on which are mounted two DC molded case circuit breakers, two main circuits, and a battery management system. Each main circuit includes a positive circuit fuse, a main positive relay, and a DC molded case circuit breaker connected in series via a copper busbar. The circuit then passes through the positive terminal of the DC molded case circuit breaker to the output positive connector of the housing, and then connects to the positive terminal of the energy storage converter. The negative terminal is the same. All the above electrical components are electrically connected via conductors. By compactly arranging the various internal electrical components, two high-voltage boxes are integrated into one. This reduces redundant electronic components, thereby reducing the volume of the high-voltage box, conserving space, and improving the volume utilization rate of the BESS (Battery Safe Energy Storage System).

Description

Technical Field

[0001] This utility model relates to the field of battery energy storage manufacturing technology, and in particular to a two-in-one high-voltage energy storage box. Background Technology

[0002] The main components of a Battery Energy Storage System (BESS) include battery clusters, energy storage, energy storage converters, power converters, local controllers, power distribution units, prefabricated compartments, and other auxiliary equipment such as temperature sensors and fire suppression systems. Under the unified management of the local controller, these components independently or by receiving commands from an external Energy Management System (EMS) to perform advanced energy dispatch and power control, achieving safe, stable, and efficient operation.

[0003] Because the capacity of a single battery is limited, batteries must be connected in series and parallel to form a battery pack, several battery packs must be connected in series and parallel to form a battery cluster, and finally several battery clusters must be connected in series and parallel to form a Battery Energy Storage System (BESS). Since a BESS consists of several battery clusters, a Battery Management System (BMS) is needed to monitor the battery status, maintain battery safety, perform battery equalization, and maintain battery consistency, etc.

[0004] BESS (Brain Storage System) can take the form of an energy storage cabinet, with the high-voltage box as its core component. The high-voltage box integrates electrical control, safety protection, and signal monitoring functions to achieve high-voltage power distribution, circuit protection, and intelligent management of the energy storage system. Each battery cluster requires an independent high-voltage box, which includes a built-in BMS controller, protection devices (such as fuses and circuit breakers), and monitoring circuits. As the number of battery clusters increases, multiple high-voltage boxes occupy a significant amount of space in the energy storage cabinet, leading to reduced volume utilization and impacting system compactness.

[0005] In practical applications, each battery cluster requires a high-voltage box, which occupies a significant portion of the energy storage cabinet, reducing the volume utilization rate of the BESS (Battery Estimated Energy Storage System). Furthermore, the presence of numerous identical components in multiple high-voltage boxes leads to resource redundancy and waste, increasing costs. Moreover, the independent operation of multiple high-voltage boxes can cause communication delays or coordination problems, affecting the BMS's unified monitoring of battery cluster status (such as SOC and SOH), increasing the difficulty of equalization management, and ultimately threatening the overall system stability.

[0006] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a two-in-one high-voltage box, which reduces redundant electronic components, reduces the volume occupied by the high-voltage box, and saves the metal materials required for the high-voltage box shell and the redundant electronic components inside. Utility Model Content

[0007] The purpose of this invention is to provide a two-in-one high-voltage energy storage box to solve the problems mentioned in the background art.

[0008] To solve the above-mentioned technical problems, this utility model is achieved through the following technical measures: a two-in-one energy storage high-voltage box, comprising a shell as the outer shell of the box, characterized in that: the shell includes a control panel as a side wall, the control panel being provided with an output positive connector, an output negative connector, an indicator light, a battery positive connector, a battery negative connector, a debugging connector, a battery cluster communication connector, a device communication connector, an AC power supply connector, and an operating handle; a mounting base plate for assembling electrical components is provided inside the shell, the mounting base plate being provided with two DC molded case circuit breakers, two main circuits, and a battery management system; each The main circuit includes a wire electrically connected from the battery positive connector of the housing, which connects the positive circuit fuse, the main positive relay, and the DC molded case circuit breaker in series via a copper busbar, then passes through the positive terminal of the DC molded case circuit breaker to the output positive connector of the housing, and then connects to the positive terminal of the energy storage converter; the main circuit also includes a wire electrically connected from the battery negative connector of the housing, which connects the negative circuit shunt, the Hall sensor, and the main negative relay in series via a copper busbar, then passes through the negative terminal of the DC molded case circuit breaker to the output negative connector of the housing, and then connects to the negative terminal of the energy storage converter; the above electrical components are electrically connected through conductors.

[0009] Compared with the prior art, the advantages of this utility model are: by compactly arranging multiple different electrical components inside, the internal structure is simplified, and two high-voltage boxes are integrated into one high-voltage box. By reducing redundant electronic components, the redundant cost of a single high-voltage box is reduced, thereby reducing the volume of the high-voltage box, correspondingly reducing the space resources occupied by the high-voltage box, and improving the volume utilization rate of BESS.

[0010] As an improvement of this utility model, the main positive relay includes a first terminal and a second terminal. The first terminal of the main positive relay is connected to the positive circuit fuse through a copper busbar, and the second terminal of the main positive relay is connected to the DC molded case circuit breaker through a copper busbar.

[0011] As an improvement to this utility model, the main positive relay is connected to a parallel circuit consisting of a pre-charge relay and a pre-charge resistor connected in series, which are then connected in parallel with the main positive relay. The purpose of this design is to protect the positive and negative circuits from the impact caused by excessive current due to insufficient internal resistance in the main circuit during initial power-on.

[0012] As an improvement to this utility model, the operating handle of the DC molded case circuit breaker is located on the control panel. The purpose of this design is to make operation convenient and intuitive.

[0013] As an improvement of this utility model, a cooling fan is provided inside the housing. The purpose of this design is to prevent excessively high temperatures inside the housing from affecting the performance of electrical components. Attached Figure Description

[0014] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0015] In the attached diagram:

[0016] Figure 1 This is a schematic diagram of the internal structure of the two-in-one energy storage high-voltage box described in this utility model.

[0017] Figure 2 This is a three-dimensional schematic diagram of the two-in-one energy storage high-voltage box described in this utility model.

[0018] Figure 3 This is a plan view of the control panel described in this utility model.

[0019] Figure 4 This is the general electrical schematic diagram of the two-in-one energy storage high-voltage box described in this utility model.

[0020] Figure 5 The electrical principle of the two-in-one energy storage high-voltage box described in this utility model is as follows: Figure 1 .

[0021] Figure 6 The electrical principle of the two-in-one energy storage high-voltage box described in this utility model is as follows: Figure 2 .

[0022] Figure 7 The electrical principle of the two-in-one energy storage high-voltage box described in this utility model is as follows: Figure 3 .

[0023] Figure 8 The electrical principle of the two-in-one energy storage high-voltage box described in this utility model is as follows: Figure 4 .

[0024] Figure 9 The electrical principle of the two-in-one energy storage high-voltage box described in this utility model is as follows: Figure 5 .

[0025] Figure 10 The electrical principle of the two-in-one energy storage high-voltage box described in this utility model is as follows: Figure 6 .

[0026] Explanation of reference numerals in the attached drawings: 10. Housing; 121. Control panel; 1211. Output negative connector; 1212. Output positive connector; 1213. Indicator light; 1214. Button; 1215. Battery positive connector; 1216. Battery negative connector; 1217. Debug connector; 1218. Battery cluster communication connector; 1219. Device communication connector; 1221. AC power supply connector; 20. Mounting base plate; 21. Hall sensor; 22. Negative circuit shunt; 23. Main negative relay; 24. Positive circuit fuse; 25. Main positive relay; 26. Cooling fan; 27. Switching power supply; 28. Pre-charge resistor; 29. ​​Pre-charge relay; 30. DC molded case circuit breaker; 31. Operating handle; 40. Battery management system; 41. Copper busbar; 50. Main circuit. Detailed Implementation

[0027] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0028] Example 1

[0029] Please refer to Figure 1 -10.

[0030] This embodiment provides a two-in-one energy storage high-voltage box, including a housing 10, which includes a control panel 121, a top plate, a bottom plate, and side plates on both sides.

[0031] The housing 10 contains a mounting base plate 20, which is used to assemble various electrical components.

[0032] Two DC molded case circuit breakers 30 and two main circuits 50 are mounted on the mounting base plate 20. Each main circuit 50 corresponds to a battery cluster, and the working status of the entire battery cluster is controlled by the battery management system 40.

[0033] Furthermore, each main circuit 50 includes a battery positive connector 1215, which is used to connect to the negative terminal of the battery cluster. The positive circuit fuse 24, the main positive relay 25, and the DC molded case circuit breaker 30 are connected in series via the copper busbar 41, then through the positive terminal of the DC molded case circuit breaker 30, and finally connected to the output positive connector 1212 to access the positive terminal of the energy storage converter.

[0034] Meanwhile, each main circuit 50 also includes a battery negative connector 1216, which connects the negative circuit shunt 22, Hall sensor 21, and main negative relay 23 in series via copper busbar 41, passes through the negative terminal of DC molded case circuit breaker 30, and finally connects to the output negative connector 1211, connecting to the negative terminal of the energy storage converter, forming a complete main circuit. When the DC molded case circuit breaker 30 is opened, the electrical circuit between the battery pack and the energy storage converter is cut off.

[0035] The positive circuit fuse 24 is used to protect the main circuit 50. When the current in the main circuit 50 exceeds the protection current of the positive circuit fuse 24, the positive circuit fuse 24 will disconnect the connection with the battery pack in time to avoid damage to the equipment or components due to excessive current.

[0036] The main positive relay 25 and the main negative relay 23 are used to control the circuit conduction of the main circuit 50. Both the main positive relay 25 and the main negative relay 23 include a first terminal and a second terminal. The first terminal of the main positive relay 25 is connected to the positive circuit fuse 24 via a copper busbar 41, and the second terminal of the main positive relay 25 is connected to the DC molded case circuit breaker 30 via the copper busbar 41. The DC molded case circuit breaker 30 also includes a first terminal and a second terminal, and its positive and negative terminals are used to connect the main positive relay 25 and the output positive connector 1212. The connection method of the main negative relay 23 is the same as that of the main positive relay 25.

[0037] The operating handle 31 of the DC molded case circuit breaker 30 is mounted on the control panel 121 and fixed by holes on the control panel 121, and is used to control the on / off of the main circuit.

[0038] In this embodiment, the pre-charge relay 29 and the pre-charge resistor 28 are connected in series to the first and second terminals of the main positive relay 25. Both the pre-charge relay 29 and the pre-charge resistor 28 include a first terminal and a second terminal. The first terminal of the pre-charge relay 29 and the first terminal of the main positive relay 25 are connected in parallel via a wiring harness. The second terminal of the pre-charge relay 29 and the first terminal of the pre-charge resistor 28 are connected in series via a wiring harness. The second terminal of the pre-charge resistor 28 and the second terminal of the main positive relay 25 are connected in parallel via a wiring harness, thus forming a parallel circuit. The purpose of this parallel circuit is to protect the positive and negative terminals from the initial power-on surge caused by excessive current in the main circuit 50 due to insufficient internal resistance.

[0039] Hall sensor 21 and negative circuit shunt 22 are used to detect current and upload it to battery management system 40. It should be noted that using Hall sensor 21 and negative circuit shunt 22 can increase the accuracy of current detection, so as to facilitate accurate calculation.

[0040] The cooling fan 26 is used for heat dissipation of the high-voltage box. In this embodiment, it is installed next to the switching power supply 27 (the main heat source). The battery management system 40 is responsible for detecting the temperature inside the high-voltage box. When a certain temperature is reached, the battery management system 40 controls the cooling fan 26 to start for heat dissipation. When the temperature is below a certain level, the battery management system 40 controls the cooling fan 26 to turn off.

[0041] In this embodiment, the invention includes two main circuits. If needed, it can be integrated into a three-in-one or four-in-one circuit to further optimize space. In this embodiment, the electrical components are electrically connected via wires or copper busbars 41. It should be noted that... Figure 4 The attached diagram shows the overall electrical schematic of the dual-in-one energy storage high-voltage box of this utility model. Figure 5-10 These are the individual diagrams of each area in the overall electrical schematic diagram; all the individual diagrams together form the overall diagram.

[0042] Furthermore, the control panel 121 is equipped with an output positive connector 1212, an output negative connector 1211, an indicator light 1213, a battery positive connector 1215, a battery negative connector 1216, a test connector 1217, a battery cluster communication connector 1218, a device communication connector 1219, a button 1214, an AC power supply connector 1221, and an operating handle 31 for the DC molded case circuit breaker 30. The electrical components (i.e., electrical parts) of the second main circuit 50 are identical. It should be noted that the button 1214 is used to control the AC power supply to both main circuits 50.

[0043] Furthermore, the housing 10 also includes a battery management system 40, which controls the switching of the main positive relay 25 and the main negative relay 23 to protect the main circuit 50. The battery management system 40 is connected to each detection point of the main circuit 50 via wires to detect voltage, current, and device status. Since the battery management system 40 is prior art, it will not be described in detail here.

[0044] Furthermore, the AC 220V power supply enters the housing 10 through the AC power supply connector 1221 and is connected to the switching power supply 27 through wires. The switching power supply 27 converts the AC 220V power supply into DC 24V power supply, which is then connected to the battery management system 40 through wires, thereby providing it with a stable power supply.

[0045] Furthermore, the battery management system 40 is connected to the battery cluster communication connector 1218 via wires. The battery cluster communication line and the battery cluster communication connector 1218 are plugged into each other to form a conductive loop. The battery management system 40 parses and processes the data.

[0046] Furthermore, the battery management system 40 is connected to the device communication connector 1219 via wires, and the device communication connector 1219 is connected to various devices via wires. The battery management system 40 sends data and processes it.

[0047] Furthermore, the battery management system 40 is connected via wires and a debugging connector 1217, and debugging operations can be performed by connecting external debugging equipment and the debugging connector 1217.

[0048] Furthermore, the battery management system 40 is connected to the indicator light 1213 via wires to control the state of the indicator light 1213, switching between red and green to indicate the state of the battery cluster.

[0049] The beneficial effects of this utility model are as follows: by compactly arranging multiple different electrical components inside, the internal structure is simplified, and two high-voltage boxes are integrated into one high-voltage box. By reducing redundant electronic components, the redundant cost of a single high-voltage box is reduced, thereby reducing the volume of the high-voltage box, correspondingly reducing the space resources occupied by the high-voltage box, and improving the volume utilization rate of BESS.

[0050] In the description of this utility model, it should be noted that the terms "vertical", "up", "down", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0051] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0052] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A two-in-one energy storage high voltage box comprising a housing (10) as a box shell, characterized in that: The housing (10) includes a control panel (121) serving as a sidewall. The control panel (121) is provided with an output positive connector (1212), an output negative connector (1211), an indicator light (1213), a battery positive connector (1215), a battery negative connector (1216), a debugging connector (1217), a battery cluster communication connector (1218), a device communication connector (1219), an AC power supply connector (1221), and an operating handle (31). Inside the housing (10) is a mounting base (20) for assembling electrical components. The mounting base (20) is provided with two DC molded case circuit breakers (30), two main circuits (50), and a battery management system (40). Each main circuit (50) includes a battery positive connector connected to the housing (10). The wires electrically connected from the connector (1215) are connected in series via a copper busbar (41) to the positive circuit fuse (24), the main positive relay (25), and the DC molded case circuit breaker (30), and then through the positive terminal of the DC molded case circuit breaker (30) to the output positive connector (1212) of the housing (10), and then connected to the positive terminal of the energy storage converter; the main circuit (50) includes wires electrically connected from the battery negative connector (1216) of the housing (10), which are connected in series via a copper busbar (41) to the negative circuit shunt (22), the Hall sensor (21), and the main negative relay (23), and then through the negative terminal of the DC molded case circuit breaker (30) to the output negative connector (1211) of the housing (10), and then connected to the negative terminal of the energy storage converter; the above electrical components are electrically connected through conductors.

2. The two-in-one energy storage high voltage box of claim 1, wherein: The main positive relay (25) includes a first terminal and a second terminal. The first terminal of the main positive relay (25) and the positive circuit fuse (24) are connected through a copper busbar (41). The second terminal of the main positive relay (25) is connected through a copper busbar (41) and the DC molded case circuit breaker (30).

3. The dual-in-one high-voltage energy storage box according to claim 1, characterized in that: The main positive relay (25) is connected to a parallel circuit consisting of a precharge relay (29) and a precharge resistor (28) connected in series, and then connected in parallel with the main positive relay (25).

4. The dual-in-one high-voltage energy storage box according to claim 1, characterized in that: The position of the operating handle (31) of the DC molded case circuit breaker (30) is set on the control panel (121).

5. The dual-in-one high-voltage energy storage box according to claim 1, characterized in that: A cooling fan (26) is provided inside the housing (10).

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