A high voltage distribution box for an energy storage system
Patent Information
- Application Number
- CN202522178301.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-15
- Publication Date
- 2026-09-11
- Estimated Expiration
- 2035-10-15
AI Technical Summary
[0003]然而，现有高压配电箱内集成了接触器、滤波电感等大功率元器件，这类器件工作时会产生强电磁干扰，易导致控制装置的精密采集信号（如毫伏级电压信号）失真，进而引发充放电判断失误，威胁电池寿命与系统安全
1、本实用新型中，通过内置防护盒隔离高压控制装置与配电箱内接触器、电感等大功率元器件，物理阻断强电磁干扰，确保电芯电压、内阻等参数采集精准，避免充放电误判，有效守护电池安全与使用寿命。
Smart Images
Figure CN224746105U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of high-voltage distribution box technology, and in particular to a high-voltage distribution box for an energy storage system. Background Technology
[0002] In energy storage systems, the high-voltage distribution box serves as the core hub connecting the power storage converter (PCS) and the battery system. The stable operation of its internal high-voltage control device directly determines the safety of battery charging and discharging and the reliability of the system. This high-voltage control device needs to accurately collect key parameters such as cell voltage, internal resistance, and insulation resistance to determine the feasibility of battery charging and discharging. The accuracy of the collected data and the safety of the device itself are crucial to avoiding risks such as battery overcharging, over-discharging, and thermal runaway.
[0003] However, existing high-voltage distribution boxes integrate high-power components such as contactors and filter inductors. These components generate strong electromagnetic interference during operation, which can easily distort the precise acquisition signals (such as millivolt-level voltage signals) of the control device, leading to errors in charge / discharge judgments and threatening battery life and system safety. Furthermore, short circuits and overloads during distribution box operation are often accompanied by a sudden temperature rise. Existing structures lack targeted protection mechanisms for high-voltage control devices—high temperatures not only easily damage the precision modules within the devices but may also cause permanent damage due to the spread of moisture, corrosive gases, and fire sources. Moreover, critical operational data is easily lost after a fault, greatly complicating troubleshooting and tracing. Therefore, a high-voltage distribution box for energy storage systems is urgently needed to solve these problems. Utility Model Content
[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a high-voltage distribution box for an energy storage system. This high-voltage distribution box isolates the high-voltage control device from high-power components such as contactors and inductors inside the distribution box through a built-in protective box, physically blocking strong electromagnetic interference, ensuring accurate acquisition of parameters such as cell voltage and internal resistance, avoiding misjudgments of charging and discharging, and effectively protecting battery safety and service life.
[0005] To achieve the above objectives, the present invention provides the following technical solution: A high-voltage distribution box for an energy storage system includes a top cover for sealing the box and two mounting panels fixed to the front and rear panels of the top cover, and further includes: The mounting box is set inside a frame consisting of a top cover and two mounting panels, wherein a built-in protective box for supporting the high-voltage control device is provided at the center of the bottom plate of the mounting box. A spring sealing plate is disposed above the mounting box and connected to the upper bottom surface of the mounting box by a spring in a stretched and energy-storing state. The support rod is slidably connected to the bottom guide rail of the mounting box and is supported on the bottom surface of the spring sealing plate; A bimetallic strip, which is fixed to the bottom surface of the mounting box and to the outer side wall of the support rod by a locking block; The built-in protective box has grooves on its front and rear side walls for connecting wire harnesses, and the bottom surface of the spring sealing plate has a sharp part for cutting wire harnesses.
[0006] Preferably, a bottom seal is installed at the bottom of the mounting box and below the built-in protective box.
[0007] Preferably, the lower bottom plate of the mounting box is rotatably connected to both sides of the upper surface of the mounting box, and a transmission link is rotatably connected to both sides of the support rod, with the other end of the transmission link rotatably connected to the bottom of the support plate.
[0008] Preferably, a high-pressure sealing tube is provided on the upper end face of the bottom seal, the high-pressure sealing tube is filled with gas, a piston plate is slidably connected inside the high-pressure sealing tube, and a compression rod is fixedly connected to the bottom of the spring sealing plate. The compression rod passes through the top of the built-in protective box and is positioned above the piston plate inside the high-pressure sealing tube.
[0009] Preferably, the high-pressure sealing tube contains high-pressure inert gas.
[0010] Preferably, the bottom of the high-pressure sealing tube is provided with a gas valve for filling the high-pressure sealing tube with gas.
[0011] This utility model has the following beneficial effects: 1. In this utility model, the high-voltage control device is isolated from the high-power components such as contactors and inductors in the distribution box by the built-in protective box, which physically blocks strong electromagnetic interference, ensures accurate acquisition of parameters such as cell voltage and internal resistance, avoids misjudgment of charging and discharging, and effectively protects battery safety and service life.
[0012] 2. In this utility model, the bimetallic strip triggers the linkage mechanism at high temperature, the spring sealing plate cuts the wire harness and seals the protective box to isolate high temperature and pollution; at the same time, the high-pressure sealing tube releases gas to block the fire source, which not only protects the control device, but also retains the key data before the fault, which is convenient for fault location and tracing. Attached Figure Description
[0013] Figure 1 This is a perspective view of a high-voltage distribution box for an energy storage system proposed in this utility model. Figure 2 This is a schematic diagram of the separation structure of the mounting panel, top cover and installation box in the high-voltage distribution box of the energy storage system proposed in this utility model; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the separation structure of the spring sealing plate and the built-in protective box in the high-voltage distribution box of the energy storage system proposed in this utility model. Figure 5 This is an isometric side sectional view of a high-voltage distribution box for an energy storage system proposed in this utility model.
[0014] Legend: 1. Mounting panel; 2. Top cover; 3. Mounting box; 4. Spring sealing plate; 5. Support rod; 6. Bimetallic strip; 7. Internal protective box; 8. Bottom seal; 9. High-pressure sealing tube; 10. Extrusion rod; 11. Support rotating plate; 12. Transmission connecting rod. Detailed Implementation
[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0016] Reference Figures 1-5 This utility model provides an embodiment of a high-voltage distribution box for an energy storage system, comprising a top cover 2 for sealing the box body and two mounting panels 1 fixed on the front and rear panels of the top cover 2, and further comprising: a mounting box 3, which is disposed inside a frame composed of the top cover 2 and the two mounting panels 1, wherein an internal protective box 7 for supporting a high-voltage control device is provided at the center of the bottom plate of the mounting box 3; a spring sealing plate 4, which is disposed above the mounting box 3 and connected to the upper bottom surface of the mounting box 3 by a spring in a stretched energy storage state; a support rod 5, which is slidably connected to the bottom guide rail of the mounting box 3 and supported on the lower bottom surface of the spring sealing plate 4; and a bimetallic strip 6, which is fixed to the lower bottom surface of the mounting box 3 and fixed to the outer side wall of the support rod 5 by a locking block; wherein the front and rear side walls of the internal protective box 7 are provided with grooves for connecting wire harnesses, and the lower bottom surface of the spring sealing plate 4 is provided with a sharp portion for cutting wire harnesses.
[0017] This high-voltage distribution box utilizes a built-in protective box 7 to house the high-voltage control device, isolating it from other components within the box. The high-voltage control device connects to the energy storage converter PCS and the battery system, collecting various parameters of the battery cells, such as voltage, internal resistance, and insulation resistance, to determine whether charging or discharging is possible. Isolating it from other components in the distribution box avoids strong electromagnetic interference from high-power components like contactors and inductors. This isolation physically blocks interference, ensuring data accuracy, preventing misjudgments of charging and discharging, and protecting battery safety and lifespan. Furthermore, the use of a bimetallic strip 6 further protects the high-voltage control device within the distribution box. When the temperature inside the mounting box 3 rises, the bimetallic strip 6 will deform in a specific direction, pulling the support rod 5 away from the bottom of the spring sealing plate 4. At this time, the spring sealing plate 4 is braked by the spring tension, cutting off the wiring harness entering the built-in protective box 7 and sealing the high-voltage control device for storage. Since high temperature in the distribution box is often a signal of dangerous conditions such as short circuit, overload, and component failure, this method can effectively isolate the temperature inside the mounting box 3, maintain the relative integrity of the high-voltage control device, facilitate the identification of the fault source during maintenance, and protect the key data inside the device from damage by high temperature or contamination, providing support for fault tracing.
[0018] In an optional embodiment: a bottom seal 8 is installed at the bottom of the mounting box 3 and below the built-in protective box 7. The high-voltage control device inside the built-in protective box 7 can be easily inspected by directly removing the bottom seal 8. Support plates 11 are rotatably connected to both sides of the upper surface of the bottom plate of the mounting box 3, and transmission rods 12 are rotatably connected to both sides of the support rod 5. The other end of the transmission rod 12 is rotatably connected to the bottom of the support plate 11. When the support rod 5 moves away from the spring sealing plate 4, it will pull the support plate 11 to rotate through the transmission rod 12, thereby causing the part of the support plate 11 used to support the spring sealing plate 4 to rotate away from the spring sealing plate 4, ensuring that the spring sealing plate 4 can seal the built-in protective box 7.
[0019] In an optional embodiment: a high-pressure sealing tube 9 is provided on the upper end face of the bottom seal 8. The high-pressure sealing tube 9 is filled with gas. A piston plate is slidably connected inside the high-pressure sealing tube 9. A compression rod 10 is fixedly connected to the bottom of the spring sealing plate 4. The compression rod 10 passes through the top of the built-in protective box 7 and is located above the piston plate inside the high-pressure sealing tube 9. The high-pressure sealing tube 9 stores high-pressure inert gas. A gas valve for filling the high-pressure sealing tube 9 with gas is provided at the bottom of the high-pressure sealing tube 9. When the spring sealing plate 4 descends, it will drive the compression rod 10 to press the piston plate above the piston plate inside the high-pressure sealing tube 9, thereby releasing the gas stored in the high-pressure sealing tube 9 and filling the inside of the built-in protective box 7, which can effectively block the fire source.
[0020] Working Principle: This high-voltage distribution box utilizes a built-in protective box 7 to house the high-voltage control device, isolating it from other components within the distribution box. The high-voltage control device connects to the energy storage converter PCS and the battery system, collecting various parameters of the battery cells, such as voltage, internal resistance, and insulation resistance, to determine whether charging or discharging is possible. Isolating it from other components in the distribution box avoids strong electromagnetic interference from high-power components such as contactors and inductors. This isolation physically blocks interference, ensuring data accuracy, preventing misjudgments of charging and discharging, and protecting battery safety and lifespan. Simultaneously, a bimetallic strip 6 provides sealing protection for the high-voltage control device at high temperatures. When the internal temperature of the mounting box 3 rises, the bimetallic strip 6 deforms in a specific direction, pulling the support rod 5 away from the bottom of the spring sealing plate 4. At this time, the spring sealing plate 4 is braked by the spring tension, cutting off access to the built-in protective box. The wiring harness inside box 7 is sealed and stored in a protective box. Since high temperatures in the distribution box are often a signal of dangerous conditions such as short circuits, overloads, and component failures, this method can effectively isolate the temperature inside the installation box 3, maintain the relative integrity of the high-voltage control device, facilitate the identification of the source of the fault during maintenance, and protect the key data inside the device from damage by high temperature or contamination, providing support for fault tracing. When the support rod 5 moves away from the spring sealing plate 4, it will pull the support rotating plate 11 to rotate through the transmission connecting rod 12, thereby causing the part of the support rotating plate 11 used to support the spring sealing plate 4 to rotate away from the spring sealing plate 4, ensuring that the spring sealing plate 4 can seal the built-in protective box 7. When the spring sealing plate 4 descends, it will drive the extrusion rod 10 to press the piston plate above the piston plate inside the high-pressure sealing tube 9, thereby releasing the gas stored in the high-pressure sealing tube 9 and filling the inside of the built-in protective box 7, which can effectively block the source of fire.
[0021] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A high voltage distribution box of an energy storage system, comprising a top cover (2) for enclosing a box body and two mounting panels (1) fixed on the front and rear panels of the top cover (2), characterized in that: Also includes: Mounting box (3), which is located inside a frame consisting of a top cover (2) and two mounting panels (1), wherein a built-in protective box (7) for carrying a high-voltage control device is provided at the center of the bottom plate of the mounting box (3). Spring sealing plate (4), the spring sealing plate (4) is disposed above the mounting box (3) and is connected to the bottom upper surface of the mounting box (3) by a spring in a stretched energy storage state; Support rod (5), which is slidably connected to the bottom guide rail of the mounting box (3) and supported on the bottom surface of the spring sealing plate (4); Bimetallic strip (6), the bimetallic strip (6) is fixed to the bottom surface of the mounting box (3) and fixed to the outer wall of the support rod (5) by a clip; The built-in protective box (7) has grooves on its front and rear side walls for connecting wire harnesses, and the bottom surface of the spring sealing plate (4) has sharp parts for cutting wire harnesses.
2. A high voltage distribution box for an energy storage system according to claim 1, characterized in that: A bottom seal (8) is installed at the bottom of the mounting box (3) and below the built-in protective box (7).
3. A high voltage distribution box for an energy storage system according to claim 2, characterized in that: The mounting box (3) has a support plate (11) rotatably connected to both sides of the upper surface of the bottom plate, and a transmission rod (12) rotatably connected to both sides of the support rod (5). The other end of the transmission rod (12) is rotatably connected to the bottom of the support plate (11).
4. A high voltage distribution box for an energy storage system according to claim 2, characterized in that: The upper end face of the bottom seal (8) is provided with a high-pressure sealing tube (9), which is filled with gas. A piston plate is slidably connected inside the high-pressure sealing tube (9), and a compression rod (10) is fixedly connected to the bottom of the spring sealing plate (4). The compression rod (10) passes through the top of the built-in protective box (7) and is located above the piston plate inside the high-pressure sealing tube (9).
5. A high voltage distribution box for an energy storage system according to claim 4, characterized in that: The high-pressure sealing tube (9) contains high-pressure inert gas.
6. A high voltage distribution box for an energy storage system according to claim 4, characterized in that: The bottom of the high-pressure sealing tube (9) is provided with a gas valve for filling gas into the high-pressure sealing tube (9).