Compact energy storage system high-voltage box

Abstract

The utility model belongs to the technical field of battery energy storage systems, and particularly relates to a compact energy storage system high-voltage box, which comprises various electrical components mounted in a slidable high-voltage box shell, the electrical components comprise first isolating switches, the first isolating switches are connected with a device mounting plate, and positive and negative electrodes of the first isolating switches are respectively connected with copper bars. The device installation plate is further provided with a second isolation switch, the positive electrode and the negative electrode of the second isolation switch are connected with the copper bars respectively, the copper bars led out of each port are arranged in two ways, one copper bar is in butt joint with the output connector, the other copper bar is in butt joint with the expansion relay, and the copper bar led out of the other end of the expansion relay is in butt joint with the output connector. The device installation plate is further provided with a heat dissipation working medium storage device, a heat dissipation guiding device is led out from the heat dissipation working medium storage device, the outer wall of the first isolation switch is attached to the heat dissipation guiding device, multiple sets of battery pack loads are achieved in a small space, and the high-voltage box can be applied to an energy storage system of a single-side-opening container.

Description

Technical Field

[0001] The present application belongs to the technical field of battery energy storage systems, and specifically relates to a compact high-voltage box for an energy storage system. Background Art

[0002] With the full-scale opening of market demand, energy storage battery technology, capacity, and cycle life are undergoing rapid iteration. Subsequently, the capacity of containerized energy storage systems has also begun to gradually increase. The capacity of a single 20-foot container has expanded to 5MWh, representing a four- to five-fold increase in the number of battery packs. The high-voltage box is the management unit for the battery cluster, providing charge and discharge control for the battery cluster, power supply and power supply control for external high-voltage components, and collecting information such as current, voltage, and temperature of the batteries within the battery cluster to implement overload protection and control functions.

[0003] At present, high-voltage boxes are all designed for container-type energy storage devices. One high-voltage box is configured for one cluster of batteries, and a cluster of batteries is arranged on each side of the container. As battery packs become larger and longer, more battery pack designs combine two battery packs into an extra-long battery pack. Since the container needs to be designed with a single door, the wire outlet cannot be set on the side without the door, and the operation is not convenient. As a result, the high-voltage box cannot be arranged on the side without the door. If a high-voltage box is used to connect more battery packs, it is necessary to increase the components in the high-voltage box, which may cause interference between components, overheating, and other installation problems, and arrangement in a limited space. Therefore, a compact high-voltage box that can connect more battery packs is needed to solve the problem of the difficulty in using extra-long battery packs in containers. Utility Model Content

[0004] The purpose of this application is to address the shortcomings of the existing technology. By setting up two sets of electrical components corresponding to the positive and negative poles of the isolation switches, two sets of battery packs can be connected, thereby realizing a method of adding a high-voltage box to a single-door container to connect more battery packs. A compact high-voltage box for an energy storage system is designed to solve the problem of poor air circulation and limited heat dissipation in a small space.

[0005] The technical solutions adopted in this application are:

[0006] A compact high-voltage box for an energy storage system comprises a high-voltage box housing and electrical components installed in the high-voltage box housing. The wall of the high-voltage box housing is surrounded by a mounting cavity, and a device mounting plate is provided in the mounting cavity. The electrical components include a first isolating switch, which is connected to the device mounting plate. The positive and negative poles of the first isolating switch are respectively connected to a copper busbar. The device mounting plate is also provided with a second isolating switch. The positive and negative poles of the second isolating switch are respectively connected to a copper busbar. The copper busbars led out from each port are arranged in two ways, one of which is connected to an output connector, and the other is connected to an expansion relay. The copper busbar led out from the other end of the expansion relay is connected to the output connector. The device mounting plate is also provided with a heat dissipation medium reservoir, and a heat dissipation guide is led out from the heat dissipation medium reservoir. The outer wall of the first isolating switch is mounted in a fit with the heat dissipation guide.

[0007] Preferably, the high-voltage box shell is provided with a rear cover, and the rear cover is provided with a control port. The device mounting plate is provided with a measurement and control device at a position close to the wall of the high-voltage box shell. The measurement and control device includes a sensor, a signal conditioner, a controller and a fan device. The controller leads out a connecting line, and the connecting line is connected to the control port.

[0008] Preferably, the high-pressure box shell is connected to the box bottom support by bolts, the box bottom support is provided with a support plate groove, the support plate groove is docked with the sliding assembly, the sliding assembly includes a bearing support plate, the bearing support plate is rotatably connected to the roller, the bearing support plate is fastened to the top plate, the upper end of the support plate groove is provided with a fixed rotating shaft, the fixed rotating shaft is rotatably provided with a top pressure knob, the top pressure knob is provided with a toggle rod and a top pressure arc segment, and the top pressure arc segment abuts against the top plate.

[0009] Preferred energy storage thermal management technology routes include air cooling, liquid cooling, heat pipe cooling, etc. Currently, air cooling systems and liquid cooling systems are the main ones on the market. The advantage of air cooling is that it reduces the battery temperature through gas convection. It has the advantages of simple structure, easy maintenance, and low cost, but the heat dissipation efficiency, heat dissipation speed, and temperature uniformity are poor. Liquid cooling reduces the battery temperature through liquid convection. The heat dissipation efficiency, heat dissipation speed, and temperature uniformity are good, but the cost is relatively high. In contrast, air cooling technology has low heat dissipation efficiency and cannot achieve precise temperature control of electrical components, which easily leads to inconsistent voltage and temperature, and may cause problems such as over-temperature shutdown and system safety. The liquid cooling system has a large specific heat capacity and fast cooling, which can achieve precise temperature control of the battery, ensure uniform cooling, and thus ensure the stable operation of the energy storage battery. It is suitable for occasions such as battery packs and high-voltage boxes with high energy density, fast charging and discharging speeds, and large changes in ambient temperature. The heat dissipation fluid reservoir is provided with a fluid pump outlet pipe, which is connected to one end of the heat dissipation guide's through pipe. The other end of the heat dissipation guide's through pipe is provided with a fluid return pipe, which is connected to the heat dissipation fluid reservoir to form a flow circuit for the working fluid. The copper busbar connected to the negative pole of the first isolating switch is arranged in two ways, one of which is connected to the extension relay, and the copper busbar led out from the other end of the extension relay is connected to the third output interface, the other copper busbar is connected to the fuse, and the copper busbar led out from the other end of the fuse is connected to the fourth output interface. The copper busbar connected to the positive pole of the first isolating switch is arranged in two ways, one of which is connected to the extension relay, and the copper busbar led out from the other end of the extension relay is connected to the first input interface, the other copper busbar is connected to the fuse, and the copper busbar led out from the other end of the fuse is connected to the second input interface.

[0010] Preferably, the copper bar connected to the negative pole of the second isolating switch is arranged in two ways, one of which is connected to the extension relay, and the copper bar led out from the other end of the extension relay is connected to the first output interface, and the other is connected to the fuse, and the copper bar led out from the other end of the fuse is connected to the second output interface. The copper bar connected to the positive pole of the first isolating switch is arranged in two ways, one of which is connected to the extension relay, and the copper bar led out from the other end of the extension relay is connected to the third input interface, and the copper bar led out from the other end of the fuse is connected to the fourth input interface.

[0011] Preferably, the high-voltage box shell is provided with an output connecting plate, and the first output interface, the second output interface, the third output interface, the fourth output interface, the first input interface, the second input interface, the third input interface, and the fourth input interface are distributed in sequence on the output connecting plate, and the laterally adjacent output ports are staggered in the height direction, and the laterally adjacent input ports are staggered in the height direction.

[0012] Preferably, the output connecting plate is provided with a fan port, which is connected to the mounting cavity. The first isolating switch and the second isolating switch are both connected to the switch handle through a switch connecting rod. The switch connecting rod is passed through the mounting cavity and enables the switch handle to be rotatably connected to the output connecting plate.

[0013] The beneficial effects of the present application are as follows: by setting up two sets of electrical components with positive and negative poles corresponding to the two sets of isolating switches, two sets of battery packs can be connected, thereby realizing the addition of high-voltage boxes in single-door containers to connect more battery packs; and a liquid-cooled heat dissipation auxiliary device is provided for isolating switches, fuses, and measurement and control devices that require a relatively constant temperature, thereby solving the problem of poor air circulation and limited heat dissipation effect in a small space. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the high-voltage box;

[0015] Figure 2 It is a schematic diagram of the layout of the high voltage box components;

[0016] Figure 3 It is a schematic diagram of the output connection board structure;

[0017] Figure 4 This is a schematic diagram of the copper busbar structure leading out of the isolating switch;

[0018] Figure 5 It is a schematic diagram of the sliding component structure;

[0019] Among them: 1. High-voltage box shell; 2. Box top cover; 3. Back cover; 4. Mounting cavity; 5. Box bottom support; 501. Bearing support plate; 502. Telescopic slide rod; 503. Support plate slot; 504. Roller; 505. Telescopic spring; 506. Top plate; 507. Fixed shaft; 508. Top pressure knob; 6. Sliding assembly; 7. Output connecting plate; 8. Device mounting plate; 9. Copper busbar; 901. Extension relay; 10. Measurement and control device; 11. Pre-charge resistor; 12. Pre-charge relay; 13. Heat dissipation guide; 14. First Isolating switch; 141, second isolating switch; 15, wiring board; 16, switch handle; 161, switch connecting rod; 17, heat dissipation medium reservoir; 171, medium pump outlet pipe; 172, medium return pipe; 18, fuse; 19, first output interface; 191, first input interface; 20, second output interface; 201, second input interface; 21, third output interface; 211, third input interface; 22, fourth output interface; 221, fourth input interface; 23, communication interface; 24, indicator light; 25, fan port. DETAILED DESCRIPTION

[0020] like Figure 1 and Figure 2As shown, a compact high-voltage box of an energy storage system includes a high-voltage box shell 1 and electrical components installed in the high-voltage box shell 1. A removable box top cover 2 is provided at the upper end of the high-voltage box shell 1 for easy maintenance. The wall of the high-voltage box housing 1 is surrounded by a mounting cavity 4, and a device mounting plate 8 is provided in the mounting cavity 4. The electrical components include a first isolating switch 14, which is connected to the device mounting plate 8. The positive and negative poles of the first isolating switch 14 are respectively connected to the copper bus 9. The device mounting plate 8 is also provided with a second isolating switch 141. The positive and negative poles of the second isolating switch 141 are respectively connected to the copper bus 9. The copper bus 9 led out from each port is divided into two paths, one of which is connected to the output connector and the other is connected to the expansion relay 901. The copper bus 9 led out from the other end of the expansion relay 901 is connected to the output connector. The device mounting plate 8 is also provided with a heat dissipation medium reservoir 17, and a heat dissipation guide 13 is led out from the heat dissipation medium reservoir 17. The outer wall of the first isolating switch 14 is fitted with the heat dissipation guide 13. In addition, a pre-charging resistor 11 and a pre-charging relay 12 are also provided in pairs on the device mounting plate.

[0021] As a preferred embodiment, the high-voltage box housing 1 is provided with a rear cover 3, and the rear cover 3 is provided with a control port. The device mounting plate 8 is provided with a measurement and control device 10 at a position close to the wall of the high-voltage box housing 1. The measurement and control device 10 includes a sensor, a signal conditioner, a controller and a fan device. The controller leads out a connecting line, and the connecting line is connected to the control port.

[0022] like Figure 1 and Figure 5 As shown, the high-pressure box shell 1 is connected to the box bottom support 5 by bolts, and the box bottom support 5 is provided with a support plate groove 503, and the support plate groove 503 is docked with the sliding assembly 6, and the sliding assembly 6 includes a bearing support plate 501, and the support plate groove 503 is provided with a telescopic slide rod 502, and the top plate 506 forms a moving pair connection with the telescopic slide rod 502, and a telescopic spring 505 is provided on the telescopic slide rod 502, and the telescopic spring 505 is arranged between the top plate 506 and the support plate groove 503, the bearing support plate 501 is rotatably connected to the roller 504, and the bearing support plate 501 is fastened to the top plate 506, and the upper end of the support plate groove 503 is provided with a fixed shaft 507, and the fixed shaft 507 is rotatably provided with a top pressure knob 508, and the top pressure knob 508 is provided with a toggle rod and a top pressure arc segment, and the top pressure arc segment abuts against the top plate 506.

[0023] The implementation method is as follows: when installing or removing the high-voltage box, the toggle rod at the upper end of the top-pressing knob 508 is toggled so that the top-pressing arc section below the top-pressing knob 508 abuts against the top plate 506, thereby pushing the roller 504 downward, allowing the high-voltage box to slide more easily in the corresponding track.

[0024] like Figure 2 and Figure 4 As shown, energy storage thermal management technology options include air cooling, liquid cooling, and heat pipe cooling. Currently, air cooling and liquid cooling systems are predominant on the market. Air cooling offers the advantage of reducing battery temperature through gas convection. It has the advantages of simple structure, easy maintenance, and low cost, but its heat dissipation efficiency, speed, and temperature uniformity are poor. Liquid cooling reduces battery temperature through liquid convection. It offers good heat dissipation efficiency, speed, and temperature uniformity, but is more expensive. In contrast, air cooling technology has low heat dissipation efficiency and cannot precisely control the temperature of electrical components, which can easily lead to voltage and temperature inconsistencies, potentially causing over-temperature shutdowns and system safety issues. Liquid cooling systems, with their high specific heat capacity and rapid cooling, enable precise battery temperature control, ensuring uniform cooling and thus stable operation of energy storage batteries. They are suitable for applications such as battery packs and high-voltage boxes, where energy density is high, charge and discharge rates are rapid, and ambient temperature fluctuations are large. The heat dissipation working fluid reservoir 17 is provided with a working fluid pump outlet pipe 171, and the working fluid pump outlet pipe 171 is connected to one end of the through pipe of the heat dissipation guide 13. The other end of the through pipe of the heat dissipation guide 13 is provided with a working fluid return pipe 172, and the working fluid return pipe 172 is connected to the heat dissipation working fluid reservoir 17 to form a flow loop of the working fluid.

[0025] The implementation method is as follows: the working fluid flows out from the working fluid pump outlet pipe 171 under the push of the small liquid pump built into the heat dissipation working fluid reservoir 17, and flows back from the working fluid return pipe 172. Since the heat dissipation guide 13 is installed in close contact with each component, the heat generated will be quickly transferred to the working fluid flowing in the heat dissipation guide 13 pipeline, realizing liquid cooling in a small space.

[0026] As a preferred method, Figure 2As shown, the copper bar 9 connected to the negative pole of the first isolating switch 14 is arranged in two ways, one of which is connected to the extension relay 901, and the copper bar 9 derived from the other end of the extension relay 901 is connected to the third output interface 21, and the copper bar 9 derived from the other end of the fuse 18 is connected to the fourth output interface. The copper bar 9 connected to the positive pole of the first isolating switch 14 is arranged in two ways, one of which is connected to the extension relay 901, and the copper bar 9 derived from the other end of the extension relay 901 is connected to the first input interface 191, and the other copper bar 9 is connected to the fuse 18, and the copper bar 9 derived from the other end of the fuse 18 is connected to the second input interface 201. The copper bar 9 connected to the negative pole of the second isolating switch 141 is arranged in two ways, one of which is connected to the extension relay 901, and the copper bar 9 derived from the other end of the extension relay 901 is connected to the first output interface 19, and the other is connected to the fuse 18, and the copper bar 9 derived from the other end of the fuse 18 is connected to the second output interface 20. The copper bar 9 connected to the positive pole of the first isolating switch 14 is arranged in two ways, one of which is connected to the extension relay 901, and the copper bar 9 derived from the other end of the extension relay 901 is connected to the third input interface 22, and the other is connected to the fuse 18, and the copper bar 9 derived from the other end of the fuse 18 is connected to the fourth input interface 221. The high-voltage box housing 1 is provided with an output connecting plate 7, and the first output interface 19, the second output interface 20, the third output interface 21, the fourth output interface, the first input interface 191, the second input interface 201, the third input interface 22, and the fourth input interface 221 are distributed in sequence on the output connecting plate 7, and the laterally adjacent output ports are staggered in the height direction, and the laterally adjacent input ports are staggered in the height direction.

[0027] The implementation method is as follows: when the first isolating switch 14 is turned on, the copper busbar 9 and components between the third input interface 22 and the third output interface 21 form an electrical path; when the second isolating switch 141 is turned on, the copper busbar 9 and components between the first input interface 191 and the first output interface 19 form an electrical path.

[0028] When the line is overloaded or short-circuited, the fuse 18 on the corresponding copper bus 9 branch is blown to protect the high-voltage box and the battery pack.

[0029] like Figure 3 and Figure 4 As shown, the output connecting plate 7 is provided with a fan port 25, which is connected to the mounting cavity 4. The first isolating switch 14 and the second isolating switch 141 are both connected to the switch handle 16 through a switch connecting rod 161. The switch connecting rod 161 is passed through the mounting cavity 4 and enables the switch handle 16 to be rotatably connected to the output connecting plate 7.

[0030] The embodiment thereof is that when a certain isolating switch needs to be opened or closed, the corresponding switch handle 16 is rotated to realize the switch operation. A small fan is provided in the aforementioned measurement control device 10. When the fan rotates in the working room, a part of the hot air flows out through the fan port 25 to realize heat dissipation.

[0031] In addition, to facilitate identification and installation, the output connection board 7 should also be provided with devices such as a communication interface 23 and an indicator light 24, which are simple and existing technologies and will not be described in detail.

Claims

1. A compact high-voltage box for an energy storage system, comprising a high-voltage box housing (1) and electrical components installed in the high-voltage box housing (1), characterized in that: The wall surface of the high-voltage box housing (1) is surrounded by a mounting cavity (4), and a device mounting plate (8) is provided in the mounting cavity (4). The electrical component includes a first isolating switch (14), the first isolating switch (14) is connected to the device mounting plate (8), and the positive and negative poles of the first isolating switch (14) are respectively connected to the copper busbar (9). The device mounting plate (8) is further provided with a second isolating switch (141), and the positive and negative poles of the second isolating switch (141) are respectively connected to the copper busbar (9). The copper busbar (9) led out of each port is divided into two paths, one of which is connected to the output connector, and the other is connected to the expansion relay (901). The copper busbar (9) led out of the other end of the expansion relay (901) is connected to the output connector. The device mounting plate (8) is further provided with a heat dissipation medium storage (17), and a heat dissipation guide (13) is led out from the heat dissipation medium storage (17). The outer wall of the first isolating switch (14) is fitted with the heat dissipation guide (13).

2. A compact energy storage system high-voltage box according to claim 1, characterized in that: The high-voltage box housing (1) is provided with a rear cover (3), and the rear cover (3) is provided with a control port. The device mounting plate (8) is provided with a measurement control device (10) at a position close to the wall of the high-voltage box housing (1). The measurement control device (10) includes a sensor, a signal conditioner, a controller and a fan device. The controller leads out a connecting line, and the connecting line is connected to the control port.

3. The compact high-voltage box for energy storage system according to claim 1, characterized in that: The high-voltage box shell (1) is connected to the box bottom support (5) by bolts, the box bottom support (5) is provided with a support plate groove (503), the support plate groove (503) is docked with the sliding assembly (6), the sliding assembly (6) includes a bearing support plate (501), the bearing support plate (501) is rotatably linked to the roller (504), the bearing support plate (501) is fastened to the top plate (506), the support plate groove (503) is provided with a telescopic slide rod (502), the top plate (50 6) forms a moving pair connection with the telescopic slide rod (502), the telescopic slide rod (502) is provided with a telescopic spring (505), the telescopic spring (505) is arranged between the top plate (506) and the supporting plate groove (503), the upper end of the supporting plate groove (503) is provided with a fixed shaft (507), the fixed shaft (507) is rotatably provided with a top pressure knob (508), the top pressure knob (508) is provided with a toggle rod and a top pressure arc segment, and the top pressure arc segment is in contact with the top plate (506).

4. The compact high-voltage box for an energy storage system according to claim 1, characterized in that: The heat dissipation working fluid reservoir (17) is provided with a working fluid pump outlet pipe (171), the working fluid pump outlet pipe (171) is butted against one end of the through pipe of the heat dissipation guide (13), and the other end of the through pipe of the heat dissipation guide (13) is provided with a working fluid return pipe (172), the working fluid return pipe (172) is connected to the heat dissipation working fluid reservoir (17), thereby forming a flow loop for the working fluid.

5. The compact high-voltage box of the energy storage system according to claim 1, characterized in that: The copper busbar (9) connected to the negative pole of the first isolating switch (14) is arranged in two ways, one of which is connected to the expansion relay (901), and the copper busbar (9) led out from the other end of the expansion relay (901) is connected to the third output interface (21), and the other copper busbar (9) connected to the negative pole of the first isolating switch (14) is connected to the fuse (18), and the copper busbar (9) led out from the other end of the fuse (18) is connected to the fourth output interface (22). The first isolating switch (1 4) The copper busbar (9) connected to the positive pole is arranged in two ways. One of the copper busbars (9) connected to the positive pole of the first isolating switch (14) is connected to the expansion relay (901), and the copper busbar (9) derived from the other end of the expansion relay (901) is connected to the first input interface (191). The other copper busbar (9) connected to the positive pole of the first isolating switch (14) is connected to the fuse (18), and the copper busbar (9) derived from the other end of the fuse (18) is connected to the second input interface (201).

6. The compact high-voltage box of the energy storage system according to claim 2, characterized in that: The copper busbar (9) connected to the negative pole of the second isolating switch (141) is arranged in two ways, one of the copper busbars (9) connected to the negative pole of the second isolating switch (141) is connected to the extension relay (901), the copper busbar (9) derived from the other end of the extension relay (901) is connected to the first output interface (19), the other copper busbar (9) connected to the negative pole of the second isolating switch (141) is connected to the fuse (18), the copper busbar (9) derived from the other end of the fuse (18) is connected to the second output interface (20), and the copper busbar (9) connected to the positive pole of the first isolating switch (14) is arranged in two ways, one of the copper busbars (9) is connected to the extension relay (901), the copper busbar (9) derived from the other end of the extension relay (901) is connected to the third input interface (211), and the copper busbar (9) derived from the other end of the fuse (18) is connected to the fourth input interface (221).

7. The compact high-voltage box of the energy storage system according to claim 6, characterized in that: The high-voltage box housing (1) is provided with an output connection plate (7); the first output interface (19), the second output interface (20), the third output interface (21), the fourth output interface (22), the first input interface (191), the second input interface (201), the third input interface (211), and the fourth input interface (221) are sequentially distributed on the output connection plate (7); the output ports adjacent to each other in the horizontal direction are staggered in height, and the input ports adjacent to each other in the horizontal direction are staggered in height.

8. The compact high-voltage box for energy storage system according to claim 7, characterized in that: The output connecting plate (7) is provided with a fan port, which is in communication with the mounting cavity (4). The first isolating switch and the second isolating switch (141) are both connected to the switch handle (16) via a switch connecting rod (161). The switch connecting rod (161) is passed through the mounting cavity (4) and enables the switch handle (16) to be rotatably connected to the output connecting plate (7).

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