High-voltage box and energy storage system

Abstract

According to the high-voltage box and the energy storage system, the heat dissipation capability of the high-voltage box is enhanced, and the service life of the high-voltage box is prolonged. The high-voltage box comprises a box body, a heat-conducting cover plate, a first fuse, a first heat-conducting gasket and a first heat-conducting block, the box body is provided with a containing cavity, the heat-conducting cover plate is installed on the box body and covers the containing cavity, the first fuse, the first heat-conducting gasket and the first heat-conducting block are all contained in the containing cavity, and the first heat-conducting gasket is installed on the surface, facing the cover plate, of the first fuse; the first heat conduction block is installed on the surface, away from the first fuse, of the first heat conduction gasket and abuts against the heat conduction cover plate.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and in particular to a high-voltage box and energy storage system. Background Technology

[0002] As the management unit and high-voltage circuit control device of the energy storage system, the high-voltage box is mainly responsible for outputting and distributing the electrical energy stored in the battery, thereby realizing the functions of disconnection and protection of branch circuit electrical components. Currently, the various electrical components, wiring harnesses, and copper busbars included in the high-voltage box are all installed in a very small space, which makes it prone to generating heat due to prolonged use and unable to dissipate heat, thus reducing the service life of the high-voltage box. Utility Model Content

[0003] This application provides a high-voltage box and energy storage system that enhances the heat dissipation capacity of the high-voltage box and improves its service life.

[0004] This application provides a high-voltage box, which includes a housing, a heat-conducting cover plate, a first fuse, a first heat-conducting pad, and a first heat-conducting block. The housing has a receiving cavity, and the heat-conducting cover plate is installed in the housing and covers the receiving cavity. The first fuse, the first heat-conducting pad, and the first heat-conducting block are all housed in the receiving cavity. The first heat-conducting pad is installed on the surface of the first fuse facing the heat-conducting cover plate, and the first heat-conducting block is installed on the surface of the first heat-conducting pad away from the first fuse and abuts against the heat-conducting cover plate.

[0005] Wherein, the thermal conductivity of the heat-conducting cover plate is greater than or equal to 200 W / (m·K), the thermal conductivity of the first heat-conducting pad is greater than or equal to 5 W / (m·K), and the thermal conductivity of the first heat-conducting block is greater than or equal to 200 W / (m·K).

[0006] Wherein, the Shore hardness of the first thermal pad is greater than or equal to 25HD and less than or equal to 40HD, and the compression of the first thermal pad is greater than or equal to 30% and less than or equal to 50%.

[0007] The high-voltage box further includes a first input terminal and a first electrical connector. The first input terminal is installed in the housing, and the first electrical connector is housed in the receiving cavity and connected between the first input terminal and the first fuse. The first electrical connector includes multiple layers of copper foil, which are stacked in the first electrical connector.

[0008] The first electrical connector further includes a heat insulation film and a heat shrink tubing. The heat insulation film wraps multiple layers of the copper foil, and the heat shrink tubing wraps the heat insulation film.

[0009] The first electrical connector is provided with a first through hole, which penetrates the first electrical connector along the thickness direction.

[0010] The housing includes a first support column, which is housed in the receiving cavity;

[0011] The first fuse is installed on the side of the first support column facing the heat-conducting cover plate and is provided with a first fixing part. The first fixing part is provided with a first fixing hole, which penetrates the first fixing part along the thickness direction of the first fixing part and communicates with the first through hole.

[0012] The high-voltage box also includes a first fixing member, which is housed in the receiving cavity. The first fixing member passes through the first through hole and the first fixing hole and is fixedly connected to the first support column.

[0013] The width of the first electrical connector is greater than or equal to 30 mm and less than or equal to 40 mm.

[0014] The high-voltage box further includes a first relay and a second electrical connector. Both the first relay and the second electrical connector are housed in the receiving cavity. The first relay is spaced apart from the first fuse. The second electrical connector is connected between the first fuse and the first relay. The second electrical connector includes multiple layers of copper foil, which are stacked in the second electrical connector.

[0015] The high-voltage box further includes a disconnect switch, a first output terminal, a third electrical connector, and a fourth electrical connector. The disconnect switch, the third electrical connector, and the fourth electrical connector are all housed in the receiving cavity. The disconnect switch is spaced apart from the first fuse and the first relay. The first output terminal is installed in the housing and spaced apart from the first input terminal. The third electrical connector is connected between the first relay and the disconnect switch. The fourth electrical connector is connected between the disconnect switch and the first output terminal. The third electrical connector and the fourth electrical connector both include hard copper busbars. The width of the third electrical connector and / or the fourth electrical connector is greater than or equal to 30 mm and less than or equal to 40 mm.

[0016] The high-voltage box further includes a second fuse, which is housed in the receiving cavity and spaced apart from the first fuse. The length direction of the second fuse is perpendicular to the length direction of the first fuse.

[0017] The enclosure includes a bottom plate and a side plate. The side plate is fixedly connected to the bottom plate and surrounds the bottom plate, forming the receiving cavity together with the bottom plate.

[0018] The high-voltage box also includes a wire harness assembly, which is housed in the receiving cavity and fixedly mounted on the base plate.

[0019] The energy storage system includes the aforementioned high-voltage box and energy storage device, and the energy storage device is electrically connected to the high-voltage box.

[0020] This application adds a first thermally conductive pad and a first thermally conductive block to the first fuse, with the first thermally conductive block abutting against a thermally conductive cover plate. The first thermally conductive pad and the first thermally conductive block act as efficient heat exchange media, rapidly conducting the heat generated by the first fuse to the thermally conductive cover plate, and then dissipating it to the surrounding environment, significantly improving the heat dissipation capacity of the high-voltage box. Simultaneously, it ensures that the internal temperature of the high-voltage box remains within a safe operating temperature range even under high load operation, improving the stability and reliability of the high-voltage box and effectively extending the service life of the internal electrical components. Attached Figure Description

[0021] To more clearly illustrate the technical solution of this application, the accompanying drawings used in the embodiments of this application will be described below.

[0022] Figure 1 This is a structural schematic diagram of the high-voltage box provided in this application;

[0023] Figure 2 yes Figure 1 The exploded structural diagram of the high-voltage box is shown.

[0024] Figure 3 yes Figure 1 The diagram shows a cross-section of the high-voltage box along point AA.

[0025] Figure 4 yes Figure 2 A partial structural schematic diagram of the high-voltage box shown;

[0026] Figure 5 yes Figure 4 The diagram shows a planar structure of the high-voltage box without the wiring harness components.

[0027] Figure 6 yes Figure 4 The diagram shows the structure of components such as the first electrical connector in the high-voltage box from another angle.

[0028] Figure 7 yes Figure 5 The diagram shows a cross-section of the high-voltage box along point BB.

[0029] Reference numerals: High-voltage box 1000, enclosure 2000, heat-conducting cover 3000, sealing ring 4000, receiving cavity 2001, opening 2002, bottom plate 2003, side plate 2004, support column a, first support column a1, second support column a2, first input terminal 1, first fuse 210, first electrical connector 110, first fixing member d1, first relay 310, second electrical connector 120, second fixing member d2, disconnecting switch 400, third electrical connector 130, third fixing member d3, first output terminal 2. Fourth electrical connector 140, fourth fixing member d4, first thermal pad 510, first thermal block 610, first fixing part 211, second fixing part 212, first fixing hole 211a, second fixing hole 212a, second through hole 11, first through hole 12, third through hole 13, fourth through hole 14, first connecting part 401, first connecting hole 401a, second connecting part 402, second connecting hole 402a, third connecting part 403, fourth connecting part 404, fifth through hole 15, sixth through hole 16, first body 131, first fastener Firmware 132, Seventh Through Hole 17, Eighth Through Hole 18, Second Body 141, Second Fastener 142, Second Input Terminal 3, Second Output Terminal 4, Second Fuse 220, Fifth Electrical Connector 150, Fifth Fixing Member d5, Second Relay 320, Sixth Electrical Connector 160, Sixth Fixing Member d6, Seventh Electrical Connector 170, Seventh Fixing Member d7, Eighth Electrical Connector 180, Eighth Fixing Member d8, Second Thermal Pad 520, Second Thermal Block 620, Third Fixing Part 221, Fourth Fixing Part 222, Ninth Through Hole 19. Tenth through hole; 20. Eleventh through hole; 21. Twelfth through hole; 22. Thirteenth through hole; 23. Fourteenth through hole; 24. Third body 171; Third fastener 172; Fifteenth through hole; 25. Sixteenth through hole; 26. Fourth body 181; Fourth fastener 182; Power supply plug 5; Power supply 700; BMS battery management system 800; Precharge relay 910; Precharge group 920; Wiring harness buckle b; Wiring harness assembly c; First wiring harness component c1; Second wiring harness component c2; Third wiring harness component c3; Fourth wiring harness component c4; Fifth wiring harness component c5. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] Please see Figure 1 and Figure 2 , Figure 1This is a structural schematic diagram of the high-voltage box 1000 provided in this application. Figure 2 yes Figure 1 The diagram shows the exploded structure of the high-voltage box 1000.

[0032] This application uses a square high-voltage box 1000 as an example for illustration. For ease of description, the following definitions are provided. Figure 1 The length direction of the high-voltage box 1000 shown is the X-axis direction, the width direction of the high-voltage box 1000 is the Y-axis direction, and the thickness direction of the high-voltage box 1000 is the Z-axis direction. The X-axis, Y-axis and Z-axis directions are perpendicular to each other.

[0033] It should be noted that the terms "parallel" and "perpendicular" used in this application to describe relative positional relationships are relative to the current technological level, and not absolute or strict mathematical definitions. Slight deviations are permissible; approximations of parallelism and perpendicularity are acceptable. For example, "A and B are parallel" means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 and 10 degrees. Similarly, "A and B are perpendicular" means that A and B are perpendicular or approximately perpendicular, and the angle between A and B can be between 80 and 100 degrees.

[0034] The high-voltage box 1000 includes a housing 2000, a heat-conducting cover plate 3000, and a sealing ring 4000. The housing 2000 has a receiving cavity 2001 located inside the housing 2000. The heat-conducting cover plate 3000 is fixedly installed in the housing 2000 and covers the receiving cavity 2001. The heat-conducting cover plate 3000 has a thermal conductivity greater than or equal to 200 W / (m·K) to ensure high thermal conductivity and good thermal conductivity performance. For example, the heat-conducting cover plate 3000 can be made of metals such as gold, silver, copper, and aluminum. In this embodiment, the heat-conducting cover plate 3000 can be an aluminum plate, which not only saves on the manufacturing cost of the high-voltage box 1000 but also ensures good thermal conductivity performance. The sealing ring 4000 is clamped between the heat-conducting cover plate 3000 and the box body 2000, which can seal the gap between the box body 2000 and the heat-conducting cover plate 3000, ensuring good sealing of the high-pressure box 1000.

[0035] It should be noted that the directional terms such as "top" and "bottom" used in this application are descriptions based on the orientation shown in the accompanying drawings, with "top" referring to the positive direction of the Z-axis and "bottom" referring to the negative direction of the Z-axis. They do not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application.

[0036] Please refer to the following: Figure 3 , Figure 3 yes Figure 1 The diagram shows a cross-section of the high-voltage box 1000 along point AA.

[0037] The enclosure 2000 includes a base plate 2003, side plates 2004, and support columns a. The base plate 2003 is located at the bottom of the enclosure 2000 and is positioned opposite the heat-conducting cover plate 3000. The side plates 2004 surround the base plate 2003 and are fixedly connected to it, forming a receiving cavity 2001. The side plates 2004 have an opening 2002 located at their top. The support columns a are housed in the receiving cavity 2001 and are located on the base plate 2003. There are four support columns a: a first support column a1, a second support column a2, a third support column (not shown), and a fourth support column (not shown). The first support columns a1 and the second support columns a2 are arranged at intervals along the width direction of the high-pressure box 1000 (the Y-axis direction in the figure). Along the length of the high-voltage box 1000 (X-axis direction in the figure), the third and fourth support columns are arranged at intervals. In some other embodiments, there may be three or fewer or more than five support columns a, and this application does not impose specific limitations on this.

[0038] Please see Figure 4 and Figure 5 , Figure 4 yes Figure 2 The diagram shows a partial structural schematic of the high-voltage box 1000. Figure 5 yes Figure 4 The diagram shows the planar structure of the high-voltage box 1000 after removing the wiring harness.

[0039] The high-voltage box 1000 also includes a first input terminal 1, a first output terminal 2, a first fuse 210, a first electrical connector 110, two first fixing members d1, a first relay 310, a second electrical connector 120, two second fixing members d2, a disconnect switch 400, a third electrical connector 130, two third fixing members d3, a fourth electrical connector 140, two fourth fixing members d4, a first thermal pad 510, and a first thermal block 610. The first input terminal 1 and the first output terminal 2 are both mounted on the enclosure 2000. Specifically, the first input terminal 1 and the first output terminal 2 are both mounted on the side plate 2004. Along the length of the high-voltage box 1000 (the X-axis direction in the diagram), the first input terminal 1 and the first output terminal 2 are arranged at intervals. The first fuse 210, the wire harness buckle b, the first electrical connector 110, the two first fixing members d1, the first relay 310, the second electrical connector 120, the two second fixing members d2, the disconnect switch 400, the third electrical connector 130, the two third fixing members d3, the fourth electrical connector 140, the two fourth fixing members d4, the first thermal pad 510 and the first thermal block 610 are all housed in the receiving cavity 2001.

[0040] Please continue. Figure 3 The first fuse 210 is installed on the side of the first support column a1 and the second support column a2 facing the heat-conducting cover plate 3000, and is spaced apart from the base plate 2003. Using the first support column a1 and the second support column a2 to install the first fuse 210 shortens the distance between the first fuse 210 and the heat-conducting cover plate 3000, thereby accelerating the heat dissipation speed of the first fuse 210 and improving the heat dissipation capacity of the high-voltage box 1000. The length direction of the first fuse 210 is parallel to the width direction of the high-voltage box 1000 (Y-axis direction in the figure). The first fuse 210 has a first fixing part 211 and a second fixing part 212. Along the length direction of the first fuse 210, the first fixing part 211 and the second fixing part 212 are respectively located on opposite sides of the first fuse 210. The first fixing part 211 has a first fixing hole 211a, which penetrates the first fixing part 211 along its thickness direction and communicates with the fixing hole of the first support column a1. The second fixing part 212 has a second fixing hole 212a, which penetrates the second fixing part 212 along its thickness direction and communicates with the fixing hole of the second support column a2. In this embodiment, the first fuse 210 is a negative electrode fuse.

[0041] Please refer to the following: Figure 6 , Figure 6 yes Figure 4 The diagram shows the structure of components such as the first electrical connector 110 in the high-voltage box 1000 from another angle.

[0042] The first electrical connector 110 is connected between the first input terminal 1 and the first fuse 210. The first electrical connector 110 has a second through hole 11 and a first through hole 12. Both the second through hole 11 and the first through hole 12 penetrate the first electrical connector 110 along its thickness direction and are located at opposite ends of the first electrical connector 110 along its length. The first through hole 12 communicates with the first fixing hole 211a.

[0043] In this embodiment, the first electrical connector 110 includes a flexible copper busbar (not shown), a heat insulation film (not shown), and a heat shrink tubing (not shown). The flexible copper busbar comprises multiple layers of copper foil, which are stacked together. For example, the flexible copper busbar may include 50 layers of copper foil. Exemplarily, the thickness of a single layer of copper foil is 0.1 mm, and the total thickness of the 50 layers of copper foil is 5 mm. Using a flexible copper busbar can reduce the impact of bending on the overlap area between the first electrical connector 110 and the first fuse 210 and between the first electrical connector 110 and the first input terminal 1, thereby improving the overlap effect between the first electrical connector 110 and the first fuse 210 and between the first electrical connector 110 and the first input terminal 1. Meanwhile, the soft copper busbar allows the manufacturing tolerance of the first electrical connector 110 to be greater than or equal to -0.5 and less than or equal to +0.5, thereby increasing the manufacturing tolerance of the first electrical connector 110, reducing the processing difficulty of the first electrical connector 110, ensuring the contact area between the first electrical connector 110 and the first fuse 210, reducing the contact resistance, and thus reducing the heat generation of the high-voltage box 1000. For example, the distance tolerance between the second through hole 11 and the first through hole 12 of the first electrical connector 110 is 0.4 mm.

[0044] The heat insulation film is wrapped around the outside of the soft copper busbar. The heat shrink tubing is wrapped around the outside of the heat insulation film to ensure that the first electrical connector 110 has sufficient stability and to ensure that the deformation of the first electrical connector 110 during use in the high-voltage box 1000 is within the specification requirements.

[0045] In this embodiment, the width of the first electrical connector 110 is greater than or equal to 30 mm and less than or equal to 40 mm to ensure that the width of the first electrical connector 110 is large enough to increase the contact area when the flexible copper busbar connects to the first input terminal 1 and the first fuse 210, thereby reducing the contact resistance between the flexible copper busbar and the first input terminal 1 and the first fuse 210, reducing the heat generation of the high-voltage box 1000, and enabling the high-voltage box 1000 to achieve a better heat dissipation effect. At the same time, the thickness of the first electrical connector 110 is greater than or equal to 3 mm and less than or equal to 5 mm to ensure a sufficiently large cross-sectional area. For example, when the width of the first electrical connector 110 is 30 mm, the thickness of the first electrical connector 110 is 5 mm.

[0046] A first fixing member d1 passes through the second through hole 11 and is fixedly connected to the first input terminal 1 to fix the first electrical connector 110 to the first input terminal 1. Another first fixing member d1 passes through the first through hole 12 and the first fixing hole 211a of the first fuse 210, and is fixedly connected to the first support post a1 to fix the first electrical connector 110 to the first fuse 210. The first fixing member d1 can be a screw or a bolt.

[0047] Please continue reading. Figures 5 to 7 , Figure 7 yes Figure 5 The diagram shows a cross-section of the high-voltage box 1000 along point BB.

[0048] The first relay 310 is mounted on the base plate 2003 and is spaced apart from the first fuse 210. In this embodiment, along the length of the housing 2000, the first relay 310 is located on one side of the first fuse 210. In this embodiment, the first relay 310 is a negative relay. For example, the length direction of the first relay 310 is parallel to the length direction of the high-voltage box 1000.

[0049] The second electrical connector 120 is connected between the first fuse 210 and the first relay 310. The second electrical connector 120 has a third through hole 13 and a fourth through hole 14. Both the third through hole 13 and the fourth through hole 14 penetrate the second electrical connector 120 along its thickness direction and are located at opposite ends of the second electrical connector 120 along its length.

[0050] In this embodiment, the structure of the second electrical connector 120 can be the same as that of the first electrical connector 110, and includes a flexible copper busbar, a heat insulation film, and a heat shrink tubing. The width of the second electrical connector 120 can also be set within the width range of the first electrical connector 110. The structural and width details of the second electrical connector 120 are described above in the section on the structure and width of the first electrical connector 110, and will not be repeated here.

[0051] A second fastener d2 passes through the third through hole 13 and the second fixing hole 212a of the first fuse 210, and is fixedly connected to the second support column a2 to fix the second electrical connector 120 to the first fuse 210. Another second fastener d2 passes through the fourth through hole 14 and is fixedly connected to the first relay 310 to fix the second electrical connector 120 to the first relay 310. The second fastener d2 can be a screw or a bolt.

[0052] The disconnector switch 400 is located on the side of the first relay 310 away from the first fuse 210, and is spaced apart from both the first relay 310 and the first fuse 210. The disconnector switch 400 includes a first connecting portion 401, a second connecting portion 402, a third connecting portion 403, and a fourth connecting portion 404. These four portions are all located around the periphery of the disconnector switch 400 and are spaced apart from each other. The first connecting portion 401 has a first connecting hole 401a. The first connecting hole 401a penetrates the first connecting portion 401 along its thickness direction. The second connecting portion 402 has a second connecting hole 402a. The second connecting hole 402a penetrates the second connecting portion 402 along its thickness direction. The third connecting portion 403 has a third connecting hole (not shown). The third connecting hole penetrates the third connecting portion 403 along its thickness direction. The fourth connecting portion 404 is provided with a fourth connecting hole (not shown). The fourth connecting hole extends through the fourth connecting portion 404 along its thickness direction. For example, along the length direction of the high-voltage box 1000, the second connecting portion 402 is located on one side of the first connecting portion 401. Along the width direction of the high-voltage box 1000, the third connecting portion 403 is located on one side of the first connecting portion 401, and the fourth connecting portion 404 is located on one side of the second connecting portion 402.

[0053] The third electrical connector 130 is fixedly connected between the first relay 310 and the disconnect switch 400. The third electrical connector 130 has a fifth through hole 15 and a sixth through hole 16. Both the fifth through hole 15 and the sixth through hole 16 penetrate the third electrical connector 130 along its thickness direction and are located at opposite ends of the third electrical connector 130 along its length. The third electrical connector 130 also includes a first body 131 and a first fastener 132. The first body 131 can be a hard copper busbar, for example, a hard copper busbar made of copper plate. The first fastener 132 is fixedly connected to the first body 131. The first fastener 132 is located on the bottom surface of the first body 131 and corresponds to the sixth through hole 16. The first fastener 132 can be a nut. In this embodiment, the first fastener 132 and the first body 131 are connected together by a press-fit process to facilitate the fixed connection between the third electrical connector 130 and the disconnect switch 400.

[0054] In this embodiment, the width of the third electrical connector 130 can be set with reference to the width range of the first electrical connector 110. The details of the width of the third electrical connector 130 are as described above for the width of the first electrical connector 110, and will not be repeated here.

[0055] A third fastener d3 passes through the fifth through hole 15 and is fixedly connected to the first relay 310 to fix the third electrical connector 130 to the first relay 310. Another third fastener d3 passes through the first connecting hole 401a and the sixth through hole 16 and is fixedly connected to the first fastener 132 to fix the third electrical connector 130 to the disconnect switch 400. The third fastener d3 can be a screw or a bolt.

[0056] The fourth electrical connector 140 is fixedly connected between the disconnector switch 400 and the first output terminal 2. The fourth electrical connector 140 has a seventh through hole 17 and an eighth through hole 18. Both the seventh through hole 17 and the eighth through hole 18 penetrate the fourth electrical connector 140 along its thickness direction and are located at opposite ends of the fourth electrical connector 140 along its length. The fourth electrical connector 140 includes a second body 141 and a second fastener 142. The material of the second body 141 is the same as that of the first body 131, and will not be described again here. The second fastener 142 is fixedly connected to the second body 141. The second fastener 142 is located on the bottom surface of the second body 141 and corresponds to the seventh through hole 17. The second fastener 142 can be a nut. In this embodiment, the connection process between the second fastener 142 and the second body 141 is the same as the connection process between the first fastener 132 and the first body 131 described above, and will not be described again here.

[0057] In this embodiment, the width of the fourth electrical connector 140 can be set with reference to the width range of the first electrical connector 110 mentioned above, and will not be repeated here.

[0058] A fourth fixing member d4 passes through the second connecting hole 402a and the seventh through hole 17, and is fixedly connected to the second fastener 142 to fix the fourth electrical connector 140 to the disconnector switch 400. Another fourth fixing member d4 passes through the eighth through hole 18 and is fixedly connected to the first output terminal 2 to fix the fourth electrical connector 140 to the first output terminal 2. The third fixing member d3 can be a screw or bolt.

[0059] Please continue reading. Figure 3The first thermally conductive pad 510 is disposed on the side of the first fuse 210 away from the base plate 2003. The thermal conductivity of the first thermally conductive pad 510 is greater than or equal to 5 W / (m·K) to ensure high thermal conductivity. Furthermore, the first thermally conductive pad 510 is made of a soft material. Specifically, the Shore hardness of the first thermally conductive pad 510 is greater than or equal to 25 HD and less than or equal to 40 HD. The elastic compression of the first thermally conductive pad 510 is greater than or equal to 30% and less than or equal to 50% to ensure that the first thermally conductive pad 510 is an elastic thermally conductive pad. For example, the first thermally conductive pad 510 is made of thermally conductive silicone.

[0060] Along the thickness direction of the high-voltage box 1000, the first heat-conducting block 610 is disposed on the side of the first heat-conducting pad 510 facing away from the first fuse 210 and abuts against the heat-conducting cover plate 3000. Since the first fuse 210 is mounted on the first support column a1 and the second support column a2, the design of the first support column a1 and the second support column a2 can shorten the distance between the first fuse 210 and the heat-conducting cover plate 3000, thus reducing the thickness of the first heat-conducting block 610 and reducing the manufacturing cost of the high-voltage box 1000. The thermal conductivity of the first heat-conducting block 610 is greater than or equal to 200 W / (m·K) to ensure that the first heat-conducting block 610 has a high thermal conductivity. The first heat-conducting block 610 can be made of metal materials such as gold, silver, copper, and aluminum. In this embodiment, the first heat-conducting block 610 is an aluminum block made of aluminum, which not only reduces the manufacturing cost of the high-voltage box 1000 but also ensures that the first heat-conducting block 610 has good thermal conductivity.

[0061] When the high-voltage box 1000 is working, the heat generated by the first fuse 210 is first conducted to the first thermal pad 510, then to the first thermal block 610, and finally to the thermal cover plate 3000. Finally, the heat is diffused to the external environment through the thermal cover plate 3000, so as to quickly dissipate the heat generated by the first fuse 210, avoid the internal temperature of the high-voltage box 1000 from being too high and affecting the service life of the high-voltage box 1000, thereby improving the heat dissipation capacity of the high-voltage box 1000 and extending its service life. Furthermore, since the first thermally conductive pad 510 has a certain amount of elastic compression, it can ensure that the first thermally conductive block 610 and the thermally conductive cover plate 3000 are always in an interference fit, thus ensuring good thermal conductivity between the first thermally conductive block 610 and the thermally conductive cover plate 3000. At the same time, it can eliminate the assembly tolerance of the first thermally conductive block 610 in the thickness direction of the high-voltage box 1000, and has a certain buffering capacity for the movement of the first thermally conductive block 610 in the thickness direction of the high-voltage box 1000 between the first fuse 210 and the thermally conductive cover plate 3000, ensuring the stability of the contact between the first thermally conductive block 610 and the thermally conductive cover plate 3000. This can further enhance the thermal conductivity inside the high-voltage box 1000, reduce the temperature rise inside the high-voltage box 1000, and thus improve the service life of the high-voltage box 1000.

[0062] Please continue reading. Figure 5 The high-voltage box 1000 also includes a second input terminal 3, a second output terminal 4, a second fuse 220, a fifth electrical connector 150, two fifth fixing parts d5, a second relay 320, a sixth electrical connector 160, two sixth fixing parts d6, a seventh electrical connector 170, two seventh fixing parts d7, an eighth electrical connector 180, two eighth fixing parts d8, a second thermal pad 520, and a second thermal block 620.

[0063] Specifically, the second input terminal 3 and the second output terminal 4 are both mounted on the side plate 2004. Along the length of the high-voltage box 1000 (X-axis direction in the diagram), the second input terminal 3 and the second output terminal 4 are arranged at intervals, each spaced apart from the first input terminal 1 and each spaced apart from the first output terminal 2. The second fuse 220, the fifth electrical connector 150, the two fifth fixing members d5, the second relay 320, the sixth electrical connector 160, the two sixth fixing members d6, the seventh electrical connector 170, the two seventh fixing members d7, the eighth electrical connector 180, the two eighth fixing members d8, the second thermal pad 520, and the second thermal block 620 are all housed in the receiving cavity 2001.

[0064] In this embodiment, the second fuse 220 is arranged perpendicularly to and spaced apart from the first fuse 210. Specifically, the length direction of the second fuse 220 is perpendicular to the length direction of the first fuse 210, and the second fuse 220 and the first fuse 210 are spaced apart. In this embodiment, along the length direction of the high-voltage box 1000, the second fuse 220 is located on one side of the first fuse 210. Along the width direction of the high-voltage box 1000, the second fuse 220 is located on one side of the first fuse 210. As the main heat sources of the high-voltage box 1000, the vertical and spaced arrangement of the second fuse 220 and the first fuse 210 can avoid the formation of heat source accumulation inside the high-voltage box 1000, reduce the mutual influence between the first fuse 210 and the second fuse 220, and adjust the heat distribution inside the high-voltage box 1000, thereby improving the service life of the high-voltage box 1000.

[0065] The second fuse 220 is fixedly installed on the side of the third and fourth support columns opposite to the base plate 2003, and is spaced apart from the base plate 2003. The length direction of the second fuse 220 is parallel to the length direction of the high-voltage box 1000. The second fuse 220 has a third fixing part 221 and a fourth fixing part 222. Along the length direction of the second fuse 220, the third fixing part 221 and the fourth fixing part 222 are respectively located on opposite sides of the second fuse 220. The third fixing part 221 has a third fixing hole (not shown), which penetrates the third fixing part 221 along its thickness direction and communicates with the fixing hole of the third support column. The fourth fixing part 222 has a fourth fixing hole (not shown), which penetrates the fourth fixing part 222 along its thickness direction and communicates with the fixing hole of the fourth support column. In this embodiment, the second fuse 220 is a positive electrode fuse.

[0066] Please refer to the following: Figure 6 The fifth electrical connector 150 is connected between the second input terminal 3 and the second fuse 220. The fifth electrical connector 150 has a ninth through hole 19 and a tenth through hole 20. Both the ninth through hole 19 and the tenth through hole 20 penetrate the fifth electrical connector 150 along its thickness direction and are located at opposite ends of the fifth electrical connector 150 along its length.

[0067] In this embodiment, the structure of the fifth electrical connector 150 can be the same as that of the first electrical connector 110, and includes a flexible copper busbar, a heat insulation film, and a heat shrink tubing. The width of the fifth electrical connector 150 can also be set within the width range of the first electrical connector 110. The structural and width details of the fifth electrical connector 150 are as described above for the structure and width of the first electrical connector 110, and will not be repeated here.

[0068] A fifth fastener d5 passes through the ninth through hole 19 and is fixedly connected to the second input terminal 3 to fix the fifth electrical connector 150 to the second input terminal 3. Another fifth fastener d5 passes through the tenth through hole 20 and the third fixing hole of the second fuse 220, and is fixedly connected to the third support post to fix the fifth electrical connector 150 to the second fuse 220. The fifth fastener d5 can be a screw or a bolt.

[0069] Please continue reading. Figure 5 The second relay 320 is mounted on the base plate 2003 and is spaced apart from the first fuse 210, the first relay 310, the second fuse 220, and the disconnect switch 400. In this embodiment, the second relay 320 is located on one side of the second fuse 220 and between the first relay 310 and the disconnect switch 400. In this embodiment, the second relay 320 is a positive relay. Exemplarily, the length direction of the second relay 320 is parallel to the width direction of the high-voltage box 1000.

[0070] The sixth electrical connector 160 is connected between the second fuse 220 and the second relay 320. The sixth electrical connector 160 has an eleventh through hole 21 and a twelfth through hole 22. Both the eleventh through hole 21 and the twelfth through hole 22 penetrate the sixth electrical connector 160 along its thickness direction and are located at opposite ends of the sixth electrical connector 160 along its length.

[0071] In this embodiment, the structure of the sixth electrical connector 160 can be the same as that of the first electrical connector 110, and includes a flexible copper busbar, a heat insulation film, and a heat shrink tubing. The width of the sixth electrical connector 160 can also be set within the width range of the first electrical connector 110. The structural and width details of the sixth electrical connector 160 are as described above for the structure and width of the first electrical connector 110, and will not be repeated here.

[0072] A sixth fastener d6 passes through the eleventh through hole 21 and the fourth fixing hole of the second fuse 220, and is fixedly connected to the fourth support column to fix the sixth electrical connector 160 to the second fuse 220. Another sixth fastener d6 passes through the twelfth through hole 22 and is fixedly connected to the second relay 320 to fix the sixth electrical connector 160 to the second relay 320. The sixth fastener d6 can be a screw or a bolt.

[0073] Please refer to the following: Figure 6The seventh electrical connector 170 is connected between the second relay 320 and the disconnect switch 400. The seventh electrical connector 170 has a thirteenth through hole 23 and a fourteenth through hole 24. Both the thirteenth and fourteenth through holes 23 and 24 penetrate the seventh electrical connector 170 along its thickness direction and are located at opposite ends of the seventh electrical connector 170 along its length. The seventh electrical connector 170 also includes a third body 171 and a third fastener 172. The material of the third body 171 is the same as that of the first body 131, and will not be described further here. The third fastener 172 is fixedly connected to the third body 171. The third fastener 172 is located on the bottom surface of the third body 171 and corresponds to the fourteenth through hole 24. The third fastener 172 can be a nut. In this embodiment, the connection process between the third fastener 172 and the third body 171 is the same as the connection process between the first fastener 132 and the first body 131 described above, and will not be described further here. The seventh electrical connector 170 is fixedly connected to the second relay 320 by a screw passing through the thirteenth through hole 23.

[0074] In this embodiment, the width of the seventh electrical connector 170 can be set with reference to the width range of the first electrical connector 110. The details of the width of the seventh electrical connector 170 are as described above for the width of the first electrical connector 110, and will not be repeated here.

[0075] A seventh fastener d7 passes through the thirteenth through hole 23 and is fixedly connected to the second relay 320 to fix the seventh electrical connector 170 to the second relay 320. Another seventh fastener d7 passes through the third connecting hole and the fourteenth through hole 24 and is fixedly connected to the third fastener 172 to fix the seventh electrical connector 170 to the disconnector switch 400. The seventh fastener d7 can be a screw or a bolt.

[0076] The eighth electrical connector 180 is fixedly connected between the disconnector switch 400 and the second output terminal 4. The eighth electrical connector 180 has a fifteenth through hole 25 and a sixteenth through hole 26. Both the fifteenth through hole 25 and the sixteenth through hole 26 penetrate the eighth electrical connector 180 along its thickness direction and are located at opposite ends of the eighth electrical connector 180 along its length. The eighth electrical connector 180 includes a fourth body 181 and a fourth fastener 182. The material of the fourth body 181 is the same as that of the first body 131, and will not be described again here. The fourth fastener 182 is fixedly connected to the fourth body 181. The fourth fastener 182 is located on the bottom surface of the fourth body 181 and corresponds to the fifteenth through hole 25. The fourth fastener 182 can be a nut. In this embodiment, the connection process between the second fastener 142 and the second body 141 is the same as the connection process between the first fastener 132 and the first body 131 described above, and will not be described again here.

[0077] In this embodiment, the width of the eighth electrical connector 180 can be set with reference to the width range of the first electrical connector 110. The details of the width of the eighth electrical connector 180 are as described above for the width of the first electrical connector 110, and will not be repeated here.

[0078] An eighth fixing member d8 passes through the fourth connecting hole and the fifteenth through hole 25, and is fixedly connected to the fourth fastener 182 to fix the eighth electrical connector 180 to the disconnector switch 400. Another eighth fixing member d8 passes through the sixteenth through hole 26 and is fixedly connected to the second output terminal 4 to fix the eighth electrical connector 180 to the second output terminal 4. The eighth fixing member d8 can be a screw or a bolt.

[0079] Please continue reading. Figure 5 The second thermally conductive pad 520 is located on the side of the second fuse 220 away from the base plate 2003. The material of the second thermally conductive pad 520 can be the same as that of the first thermally conductive pad 510, which will not be described further here. The second thermally conductive block 620 is located on the side of the second thermally conductive pad 520 away from the second fuse 220 and abuts against the thermally conductive cover plate 3000. The material of the second thermally conductive block 620 can be the same as that of the first thermally conductive block 610, which will not be described further here.

[0080] When the high-voltage box 1000 is working, the heat generated by the second fuse 220 is first conducted to the second thermal pad 520, then to the second thermal block 620, and finally to the thermal cover plate 3000. Finally, the heat is diffused to the external environment through the thermal cover plate 3000, so as to quickly dissipate the heat generated by the second fuse 220, avoid the internal temperature of the high-voltage box 1000 from being too high and affecting the service life of the high-voltage box 1000, thereby further improving the heat dissipation capacity of the high-voltage box 1000 and extending its service life. Furthermore, since the second thermally conductive pad 520 has a certain amount of elastic compression, it can ensure that the second thermally conductive block 620 and the thermally conductive cover plate 3000 are always in interference fit, thus ensuring good thermal conductivity between the second thermally conductive block 620 and the thermally conductive cover plate 3000. At the same time, it can eliminate the assembly tolerance of the second thermally conductive block 620 in the thickness direction of the high-voltage box 1000, and has a certain buffering capacity for the movement of the second thermally conductive block 620 in the thickness direction of the high-voltage box 1000 between the first fuse 210 and the thermally conductive cover plate 3000. This ensures that the second thermally conductive block 620 and the thermally conductive cover plate 3000 are in continuous contact, which can further enhance the thermal conductivity inside the high-voltage box 1000, reduce the temperature rise inside the high-voltage box 1000, and thus improve the service life of the high-voltage box 1000.

[0081] The high-voltage box 1000 includes multiple functional modules and multiple functional devices. The multiple functional modules include a first input terminal 1, a first output terminal 2, a second input terminal 3, a second output terminal 4, and a power supply module 5. The power supply module 5 is mounted on the side panel 2004 and is spaced apart from the first input terminal 1, the first output terminal 2, the second input terminal 3, and the second output terminal 4.

[0082] Multiple functional components may include a power supply 700, a battery management system (BMS) 800, a precharge relay 910, and a precharge group 920. The power supply 700, BMS 800, precharge relay 910, and precharge group 920 are all mounted in the receiving cavity 2001 and on the base plate 2003, and are spaced apart from the first fuse 210, the first relay 310, the disconnect switch 400, the second fuse 220, and the second relay 320, and are spaced apart from each other.

[0083] Please continue reading. Figure 4 The high-voltage box 1000 also includes a wiring harness assembly c, which is mounted on the base plate 2003. Exemplarily, the wiring harness assembly c is mounted on the base plate 2003 via a wiring harness clip b. Specifically, the wiring harness assembly c includes a first wiring harness component c1, a second wiring harness component c2, a third wiring harness component c3, a fourth wiring harness component c4, and a fifth wiring harness component c5. The first wiring harness component c1 connects two different functional devices. For example, the first wiring harness component c1 can be connected between a pre-charge relay 910 and a pre-charge group 920. The second wiring harness component c2 connects between a functional device and a functional plug-in. The second wiring harness component c2 can be fixed together with the first wiring harness component c1. For example, the second wiring harness component c2 connects between a power supply 700 and a power supply plug-in 5, and can be fixed to the first wiring harness component c1 via a wiring harness clip b. The third wiring harness component c3 connects between a functional device and a first relay 310. The third wiring harness c3 can be fixed together with the first wiring harness c1 via the wiring harness clip b, and / or fixed together with the second wiring harness c2. For example, the third wiring harness c3 is connected between the BMS battery management system 800 and the first relay 310, and can be fixed together with the second wiring harness c2 via the wiring harness clip b.

[0084] The fourth wiring harness c4 is connected between the functional device and the disconnect switch 400, and can be fixed to one or more of the first wiring harness c1, the second wiring harness c2, and the third wiring harness c3 via the wiring harness buckle b.

[0085] The fifth wiring harness c5 is connected between the functional device and the second relay 320. The fifth wiring harness c5 can be secured to one or more of the first wiring harness c1, the second wiring harness c2, the third wiring harness c3, and the fourth wiring harness c4 via a wiring harness clip b. For example, the fifth wiring harness c5 is connected between the BMS battery management system and the second relay 320, and can be secured to the first wiring harness c1 via the wiring harness clip b.

[0086] It should be noted that the position of the wire harness assembly c can be adjusted according to the specific location of the electrical components inside the high-voltage box 1000. Under the premise of complying with the wire harness layout specifications and facilitating wire harness installation, the wire harness assembly c should be kept as far away as possible from the main heat sources inside the high-voltage box 1000, namely the first fuse 210 and the second fuse 220. This reduces the impact of the heat generated by the heat sources on the wire harness assembly c, making the wire harness assembly c less prone to aging and the high-voltage box 1000 less prone to failure, thereby improving the service life of the high-voltage box 1000.

[0087] This embodiment adds a first thermally conductive pad 510 and a first thermally conductive block 610 to the first fuse 210, with the first thermally conductive block 610 abutting against the thermally conductive cover plate 3000. The first thermally conductive pad 510 and the first thermally conductive block 610 act as efficient heat exchange media, rapidly conducting the heat generated by the first fuse 210 to the thermally conductive cover plate 3000, and then dissipating it to the surrounding environment, significantly improving the heat dissipation capacity of the high-voltage box 1000. Simultaneously, it ensures that the internal temperature of the high-voltage box 1000 remains within a safe operating temperature range even under high load operation, improving the stability and reliability of the high-voltage box 1000 and effectively extending the service life of the internal electrical components.

[0088] This application also provides an energy storage system, such as an energy storage cabinet or a new energy vehicle. The energy storage system includes a high-voltage box 1000 and energy storage devices, with the energy storage devices electrically connected to the high-voltage box 1000. The high-voltage box 1000 can serve as a management unit for the energy storage devices, enabling the output and distribution of the electrical energy stored in the energy storage devices. The energy storage devices can be individual batteries, battery modules, battery systems, or battery clusters. The energy storage system provided in this embodiment, by incorporating the aforementioned high-voltage box 1000, enhances the heat dissipation performance of the energy storage system, thereby improving its service life and operational safety and reliability.

[0089] The above descriptions are merely optional embodiments of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the core ideas of this application and are not intended to limit the patent scope of this application. At the same time, for those skilled in the art, equivalent structural transformations made based on the concept of this application using the specification and drawings of this application, or direct / indirect applications in other related technical fields, are all included within the patent protection scope of this application.

Claims

1. A high voltage box characterized by, The high-voltage box comprises a box body, a heat-conducting cover plate, a first fuse, a first heat-conducting gasket and a first heat-conducting block, the box body is provided with a receiving cavity, the heat-conducting cover plate is installed on the box body and covers the receiving cavity, the first fuse, the first heat-conducting gasket and the first heat-conducting block are all received in the receiving cavity, the first heat-conducting gasket is installed on the surface of the first fuse facing the heat-conducting cover plate, the first heat-conducting block is installed on the surface of the first heat-conducting gasket away from the first fuse and abuts against the heat-conducting cover plate.

2. The high pressure cell of claim 1, wherein, The heat-conducting coefficient of the heat-conducting cover plate is greater than or equal to 200 W / (m·K), the heat-conducting coefficient of the first heat-conducting gasket is greater than or equal to 5 W / (m·K), and the heat-conducting coefficient of the first heat-conducting block is greater than or equal to 200 W / (m·K).

3. The high-pressure cell according to claim 1 or 2, characterized in that The Shore hardness of the first heat-conducting gasket is greater than or equal to 25 HD and less than or equal to 40 HD, or the compression amount of the first heat-conducting gasket is greater than or equal to 30% and less than or equal to 50%.

4. The high-pressure cell according to claim 1 or 2, characterized in that The high-voltage box further comprises a first input terminal and a first electric connecting piece, the first input terminal is installed on the box body, the first electric connecting piece is received in the receiving cavity and connected between the first input terminal and the first fuse, wherein the first electric connecting piece comprises multiple layers of copper foils, and the multiple layers of copper foils in the first electric connecting piece are arranged in a stacked manner.

5. The high-pressure cell of claim 4, wherein, The first electric connecting piece further comprises a heat insulation film and a heat shrinkable sleeve, the heat insulation film wraps the multiple layers of copper foils, and the heat shrinkable sleeve wraps the heat insulation film.

6. The high pressure cell of claim 4, wherein, The first electric connecting piece is provided with a first through hole, the first through hole penetrates through the first electric connecting piece along the thickness direction of the first electric connecting piece; The box body comprises a first supporting column, and the first supporting column is received in the receiving cavity; The first fuse is installed on the side of the first supporting column facing the heat-conducting cover plate and is provided with a first fixing part, the first fixing part is provided with a first fixing hole, the first fixing hole penetrates through the first fixing part along the thickness direction of the first fixing part and communicates with the first through hole; The high-voltage box further comprises a first fixing piece, the first fixing piece is received in the receiving cavity, the first fixing piece penetrates through the first through hole and the first fixing hole and is fixedly connected to the first supporting column.

7. The high pressure cell of claim 4, wherein, The width of the first electric connecting piece is greater than or equal to 30 mm and less than or equal to 40 mm.

8. The high pressure cell of claim 4, wherein, The high-voltage box further comprises a first relay and a second electric connecting piece, the first relay and the second electric connecting piece are both received in the receiving cavity, the first relay is arranged in a spaced manner with the first fuse, and the second electric connecting piece is connected between the first fuse and the first relay, wherein the second electric connecting piece comprises multiple layers of copper foils, and the multiple layers of copper foils in the second electric connecting piece are arranged in a stacked manner.

9. The high-pressure cell of claim 8, wherein, The high-voltage box further comprises an isolating switch, a first output terminal, a third electric connecting piece and a fourth electric connecting piece, the isolating switch, the third electric connecting piece and the fourth electric connecting piece are all accommodated in the accommodating cavity, the isolating switch is spaced apart from the first fuse and the first relay, the first output terminal is mounted on the box body and is spaced apart from the first input terminal, the third electric connecting piece is connected between the first relay and the isolating switch, the fourth electric connecting piece is connected between the isolating switch and the first output terminal, wherein the third electric connecting piece and the fourth electric connecting piece both comprise a hard copper bar, the width of the third electric connecting piece and / or the fourth electric connecting piece is greater than or equal to 30 mm and less than or equal to 40 mm.

10. The high-pressure cell according to claim 1 or 2, characterized in that The high-voltage box further comprises a second fuse, the second fuse is accommodated in the accommodating cavity and is spaced apart from the first fuse, the length direction of the second fuse is perpendicular to the length direction of the first fuse.

11. The high pressure cell of claim 6, wherein, The box body comprises a bottom plate and a side plate, the side plate is fixedly connected to the bottom plate, is arranged around the bottom plate and forms the accommodating cavity together with the bottom plate; The high-voltage box further comprises a wire harness set, the wire harness set is accommodated in the accommodating cavity and is fixedly mounted on the bottom plate.

12. An energy storage system characterized by, The energy storage system comprises the high-voltage box and an energy storage device according to any one of claims 1-11, and the energy storage device is electrically connected to the high-voltage box.

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