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JP-7856725-B2 - High-voltage box

JP7856725B2JP 7856725 B2JP7856725 B2JP 7856725B2JP-7856725-B2

Inventors

  • 黄 名祥
  • 孫 慧

Assignees

  • 武漢億緯儲能有限公司

Dates

Publication Date
20260511
Application Date
20241018
Priority Date
20231227

Claims (12)

  1. A high-voltage box comprising a box body with an opening at the top, a lid plate that seals the opening of the box body, and electrical components provided in the storage space inside the box body, The box body includes opposing first side panels , second side panels , third side panels, and fourth side panels , the storage space is located between the first side panel and the second side panel, and the first side panel, third side panel, second side panel, and fourth side panel are connected end to end in order. The electrical components include a battery management system, a positive input interface in the positive electrode circuit, a positive fuse , a positive output interface, and a negative input interface, a negative fuse , and a negative output interface in the negative electrode circuit. The battery management system is located on the side of the housing space closest to the first side plate, the positive fuse and negative fuse are located on the side of the housing space closest to the second side plate, the positive input interface and the negative input interface are provided on the side of the third side plate closest to the first side plate, and the positive output interface and the negative output interface are provided on the side of the third side plate closest to the second side plate. The battery management system is located in the corner between the first side plate and the fourth side plate, the positive fuse and the positive output interface are located on the same straight line, and the negative fuse and the negative output interface are located on the same straight line , in a high-voltage box.
  2. The high-voltage box according to claim 1, wherein the distance between the battery management system and the positive fuse is in the range of 200 mm to 280 mm, and/or the distance between the battery management system and the negative fuse is in the range of 200 mm to 280 mm.
  3. The electrical component further includes a bottom plate , and the first side plate, the third side plate, the second side plate, and the fourth side plate are connected to the periphery of the bottom plate and together enclose the housing space. The high-voltage box according to claim 1, wherein the electrical components further include an AC/DC power module, an equalizing relay, a precharge resistor, a disconnect switch, a positive relay, a negative relay, and a shunt , the positive input interface, the disconnect switch, the positive relay, the positive fuse, and the positive output interface are connected in order to form the positive circuit, the negative input interface, the disconnect switch, the negative relay, the negative fuse, the shunt , and the negative output interface are connected in order to form the negative circuit, the equalizing relay is connected in series with the precharge resistor to form an equalizing branch, the equalizing branch is connected in parallel with the positive relay, and the battery management system is connected to the AC/DC power module, the positive circuit, and the negative circuit.
  4. The high-voltage box according to claim 3, wherein the box body is a rectangular box body , and the AC/DC power module is located between the battery management system and the fourth side plate.
  5. The high-voltage box according to claim 3, wherein the first side plate, the fourth side plate, and the second side plate are integrally molded bendable members, the third side plate is connected to the bendable member by welding, and a sealing ring is provided between the lid plate and the box body.
  6. The high-voltage box according to any one of claims 1 to 5, wherein the electrical component further includes a first temperature sensor and a second temperature sensor connected to a battery management system, the first temperature sensor being provided adjacent to the positive fuse, and the second temperature sensor being provided adjacent to the negative fuse.
  7. The high-voltage box according to claim 6, wherein the distance between the first temperature sensor and the positive fuse is 18 mm - 22 mm, and the distance between the second temperature sensor and the negative fuse is 18 mm - 22 mm.
  8. The high-voltage box according to claim 3, wherein the connection between the positive relay and the positive fuse, the connection between the positive fuse and the positive output interface, the connection between the negative relay and the negative fuse, and the connection between the negative fuse and the shunt are all made by copper bars having a first cross-sectional area, the first cross-sectional area being 2.5 * 40 mm² - 3.5 * 45 mm² .
  9. The high-voltage box according to claim 3, wherein heat dissipation fins are provided on the copper bar between the positive relay and the positive fuse, and on the copper bar between the negative relay and the negative fuse.
  10. The high-voltage box according to claim 9, wherein the box body is further provided with a fan, and the air-blowing surface of the fan faces a heat dissipation fin on a copper bar at at least one of its locations.
  11. The high-voltage box according to claim 3, wherein the connection harness between the battery management system and the AC/DC power module, positive electrode circuit, and negative electrode circuit includes a high-voltage harness and a low-voltage harness, the high-voltage harness and the low-voltage harness being independent of each other, and the outer surface of the high-voltage harness being covered with an insulating layer.
  12. The high-voltage box according to claim 3, wherein the third side panel is further provided with an auxiliary power interface, a communication expansion interface, a slave power supply communication interface, an MBMU communication interface, an SBMU communication interface, a power indicator lamp, a fault indicator lamp, a pull-up handle, and a switch handle connected to the disconnect switch.

Description

[Cross-reference of related applications] This application claims priority to the Chinese patent application filed with the China National Patent Office on December 27, 2023, application number 2023235919444, and all contents of the aforementioned application are incorporated into this application by reference. [Technical Field] This application relates to the field of electrical energy technology, and more specifically to high-voltage boxes. The high-voltage box is a crucial component of an energy storage battery system, and it houses various electronic devices, such as a Battery Management System (BMS), relays, fuses, and power modules. This is a schematic diagram of the structure of the high-voltage box according to this application.This is a schematic diagram of the internal structure of the high-voltage box according to this application.This is a circuit diagram illustrating the positive and negative electrode circuits inside the high-voltage box according to this application.A schematic diagram of a partial structure of the battery management system according to this application. Referring to Figures 1 to 4, Figure 3 is a circuit principle diagram of the positive and negative electrode circuits inside the high-voltage box according to this application, Figure 4 is a schematic diagram of a partial structure of the battery management system according to this application, and Figure 3 schematically shows the connection terminals of each device that are connected to the relevant pins in the battery management system shown in Figure 4. The embodiment of this application provides a high-voltage box 100 comprising a box body 10 having an opening at the top, a lid plate 20 that seals the opening of the box body 10, and electrical components provided in the storage space inside the box body 10. The box body 10 includes opposing first side plates 101 and second side plates 102, with the housing space located between the first and second side plates 101 and 102. The electrical components include a battery management system 302, a positive fuse 305 in the positive circuit, and/or a negative fuse 307 in the negative circuit. In one embodiment, fuses are provided in both the positive and negative circuits, i.e., the electrical components include the positive fuse 305 and the negative fuse 307. Of course, in other embodiments, fuses may not be provided in the positive and negative circuits as needed. To make it easier to understand, the positive electrode circuit is a circuit within the high-voltage box 100 that connects the positive electrode input interface and the positive electrode output interface. The positive electrode voltage signal is input into the high-voltage box 100 from the positive electrode input interface, transmitted through the positive electrode circuit to the positive electrode output interface, and output. The negative electrode circuit is a circuit within the high-voltage box 100 that connects the negative electrode input interface and the negative electrode output interface. The negative electrode voltage signal is input into the high-voltage box 100 from the negative electrode input interface, transmitted through the negative electrode circuit to the negative electrode output interface, and output. The battery management system 302 is located on the side of the housing space closest to the first side plate 101, that is, it is provided close to the first side plate 101, and is closer to the first side plate 101 than to the second side plate 102. For example, the battery management system 302 may be fixed to the first side plate 101, or the gap between the battery management system 302 and the first side plate 101 may be small, for example, less than 5 mm, for example, 0 mm (i.e., the battery management system 302 and the first side plate 101 are in direct contact), 2 mm, or 4 mm. The positive fuse 305 and the negative fuse 307 are located on the side of the housing space closest to the second side plate 102, that is, they are provided close to the second side plate 102, and closer to the second side plate 102 than to the first side plate. For example, both the positive fuse 305 and the negative fuse 307 may be fixed to the second side plate 102, or the gaps between the positive fuse 305 and the negative fuse 307 and the second side plate 102 may be small. It should be explained that the positive fuse 305 and the negative fuse 307 may be provided in different positions close to the second side plate 102 as needed. This allows the battery management system 302 and the positive fuse 305 and negative fuse 307 to be located on both sides of the housing space within the box body 10, thereby separating the positive and negative fuses from the battery management system. This reduces electromagnetic interference from the fuses to the battery management system and further reduces the impact of heat generated by the fuses on the battery management system. In some embodiments, the distance between the ba