High-voltage box integrated with DCDC

Abstract

The utility model provides a DCDC integrated high-voltage box, which is applied to an energy storage system and comprises a control assembly and a DCDC assembly, the control assembly comprises a control box, the control box is used for installing a high-voltage control circuit, the DCDC assembly comprises a DCDC module, the DCDC module is connected with the high-voltage control circuit, and the DCDC assembly is detachably connected with the control box. The DCDC integrated high-voltage box provided by the utility model can improve the space utilization rate of an energy storage system.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage, in particular to a high-voltage box integrated with DCDC. Background Art

[0002] In energy storage systems, multiple battery clusters on the DC side are generally connected in parallel to the energy storage converter (PCS). Each battery cluster is connected to the energy storage converter through a high-voltage control box. The high-voltage control box controls the switching in or out of the battery cluster in the DC parallel system, manages the charging and discharging of the battery cluster, and ensures the safe operation of the energy storage system. However, in this way of connecting multiple battery clusters in parallel on the DC side, the output voltage of each battery cluster is different. After parallel connection, the available capacity of the energy storage system is the capacity of the weakest battery cluster.

[0003] To this end, the prior art installs a DCDC module outside the high-voltage control box, and adjusts the voltage output by the battery cluster through the DCDC module to make the output voltage of each battery cluster consistent and increase the available capacity of the energy storage system. However, the DCDC module occupies the internal space of the energy storage system, reducing the available space of the energy storage system. Utility Model Content

[0004] In view of this, an object of the present invention is to provide a high-voltage box with integrated DCDC so as to increase the available space of the energy storage system.

[0005] To achieve the above-mentioned purpose, the utility model provides a high-voltage box with integrated DCDC, which is applied to an energy storage system, including: a control component and a DCDC component, the control component includes a control box, the control box is used to install a high-voltage control circuit, the DCDC component includes a DCDC module, the DCDC module is connected to the high-voltage control circuit, and the DCDC component is detachably connected to the control box.

[0006] Preferably, the control box includes an isolation base plate, the top opening of the control box is provided, the isolation base plate is located at the bottom of the control box, the high-voltage control circuit is installed on the isolation base plate through the top opening, and the DCDC component is located below the isolation base plate and connected to the bottom surface of the isolation base plate.

[0007] Preferably, the control box includes a front panel, a rear panel, a first side panel and a second side panel, the front panel and the rear panel are respectively arranged at the front and rear ends of the control box, the first side panel and the second side panel are respectively arranged at the left and right sides of the control box, and the isolation bottom plate is vertically connected to the front panel, the rear panel, the first side panel and the second side panel respectively.

[0008] Preferably, the isolation bottom plate includes a first bottom plate, a vertical partition plate and a second bottom plate, the first bottom plate and the second bottom plate are horizontally arranged, the top end of the vertical partition plate is connected to the second bottom plate, the bottom end of the vertical partition plate is connected to the first bottom plate, the end of the first bottom plate away from the vertical partition plate is connected to the first side plate, and the end of the second bottom plate away from the vertical partition plate is connected to the second side plate.

[0009] Preferably, the bottom of the vertical partition and the second side plate are both provided with a first connecting piece, the DCDC component is provided with a second connecting piece, the DCDC component is detachably connected to the first connecting piece through the second connecting piece, and the bottom of the DCDC component is flush with the first bottom plate.

[0010] Preferably, the second bottom plate is provided with a threading hole, and the DCDC module is connected to the high-voltage control circuit through the threading hole.

[0011] Preferably, the DCDC component includes a third base plate, a left side plate and a right side plate, the third base plate is horizontally arranged, the left side plate and the right side plate are vertically connected to the left and right sides of the third base plate respectively, the left side surface of the DCDC module is connected to the left side plate, and the right side surface of the DCDC module is connected to the right side plate.

[0012] Preferably, the left side panel includes a front air diffusion plate, a fixed plate and a rear air diffusion plate, the fixed plate is connected to the left side of the DCDC module, one end of the front air diffusion plate is connected to the fixed plate, and the other end is inclined in a direction away from the DCDC module, the rear air diffusion plate has the same structure as the front air diffusion plate and is symmetrically arranged, and the right side panel has the same structure as the left side panel and is symmetrically arranged.

[0013] Preferably, the DCDC assembly further comprises a reinforcing bar, which is respectively connected to the left side plate and the right side plate and is close to the top of the left side plate and the right side plate.

[0014] Preferably, the DCDC component includes an air inlet plate and an air outlet plate, the air inlet plate and the air outlet plate are connected to the control box, the air inlet plate is located at the front end of the DCDC module, and the air outlet plate is located at the rear end of the DCDC module, and the air inlet plate and the air outlet plate are provided with multiple ventilation holes.

[0015] Compared with the prior art, the utility model has the following technical effects: by connecting the DCDC component and the control component together, the DCDC component is placed on the battery rack together with the control component, without occupying additional space of the energy storage system; by installing the high-voltage control circuit on the isolation bottom plate, and installing the DCDC component on the bottom surface of the isolation bottom plate, the components of the high-voltage control circuit and the DCDC module are isolated and placed without interfering with each other; the high-voltage control circuit can be installed through the top opening, and the DCDC component can be installed at the bottom of the control box, and the high-voltage control circuit and the DCDC component do not affect each other during installation and maintenance; the isolation bottom plate is set in an inverted "Z" shape, so that the DCDC component is located at the lower right position of the control box, and the overall space of the control box is reasonably utilized, and the structure is compact. The high-voltage box with integrated DCDC provided by the utility model can improve the space utilization rate of the energy storage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of a high voltage box with integrated DCDC provided by the utility model;

[0017] Figure 2 A schematic diagram of the separation of the control component and the DCDC component provided by the utility model;

[0018] Figure 3 A schematic diagram of a control box provided by the utility model;

[0019] Figure 4 Another schematic diagram of the control box provided by the utility model;

[0020] Figure 5 A schematic diagram of a DCDC component provided by the utility model;

[0021] Figure 6 This is another schematic diagram of the high voltage box with integrated DCDC provided by the utility model. DETAILED DESCRIPTION

[0022] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, but the present invention is not limited to these embodiments. The present invention covers any substitution, modification, equivalent method and scheme made within the spirit and scope of the present invention.

[0023] In order to enable the public to have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without these detailed descriptions.

[0024] The present invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. It should be noted that the accompanying drawings are all simplified and use non-precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0025] The high-voltage control box is an important component in the energy storage system. It is an intermediate unit connecting the battery cluster and the PCS. It controls the charging and discharging of the battery cluster through the high-voltage control circuit, and protects it from over-temperature and over-current. The high-voltage control circuit includes an isolating switch, a positive contactor, a negative contactor, a shunt, a fuse, a pre-charge resistor and a pre-charge contactor, as well as a battery management unit (BCU) for monitoring and managing the battery cluster and a switching power supply for power supply and other related electronic components. In the energy storage system, the battery cluster includes multiple battery packs, which are usually placed layer by layer on a battery rack, and the high-voltage control box is placed at the bottom or top of the battery rack together with the battery packs. The DCDC module is used to adjust the voltage of the battery cluster so that the output voltage of each grid-connected battery cluster in the energy storage system is consistent.

[0026] Please refer to Figure 1 and Figure 2 , is a schematic diagram of an integrated DCDC high-voltage control box provided by an embodiment of the utility model, including a control assembly 10 and a DCDC assembly 20. The control assembly 10 includes a control box 11 and an upper cover 12. The control box 11 is detachably connected to the upper cover 12, and the upper cover 12 covers the top of the control box 11. The control box is used to install a high-voltage control circuit. The DCDC assembly 20 includes a DCDC module 21. The DCDC module 21 is connected to the high-voltage control circuit. In this embodiment, there are two DCDC modules 21, and the upper and lower layers are stacked to save space. The DCDC assembly 20 is detachably connected to the control box 11, so that it can be placed on the battery rack together with the control assembly 10, without occupying other space of the energy storage system, thereby improving space utilization.

[0027] like Figure 3 As shown, the control box 11 is provided with an opening at the top and an isolation base plate 113 at the bottom. The space between the top opening and the isolation base plate 113 is a first installation area 111. The first installation area 111 is used to install related electronic components constituting the high-voltage control circuit, and can be specifically installed on the top surface of the isolation base plate 113. The DCDC assembly 20 is connected to the bottom surface of the isolation base plate 113 and is located below the isolation base plate 113, so that the DCDC module 21 and related components of the high-voltage control circuit are placed separately and isolated to avoid the influence caused by mutual interference.

[0028] Specifically, Figure 3As shown, the control box 11 includes a front panel 114, a rear panel 115, a first side panel 116 and a second side panel 117, all of which are vertically arranged. In this embodiment, the front panel 114 and the rear panel 115 have the same structure and are symmetrically arranged at the front and rear ends of the control box 11. The front panel 114 is equipped with a battery terminal interface, a load terminal interface, a communication interface, a power supply interface and a switch handle, etc., which are convenient for connecting each wiring harness. The first side panel 116 and the second side panel 117 have the same structure and are symmetrically arranged on the left and right sides of the control box 11. The first side panel 116 and the second side panel 117 are respectively connected to the front panel 114 and the rear panel 115, and the isolation bottom plate 113 is respectively vertically connected to the front panel 114, the rear panel 115, the first side panel 116 and the second side panel 117. The high-voltage control circuit enters the control box 11 through the top opening and is installed or maintained inside the control box 11, while the DCDC component 20 is located below the isolation bottom plate 113 and is installed and maintained outside the control box 11, and does not affect each other.

[0029] Specifically, Figure 4As shown, the isolation bottom plate 113 is in an inverted "Z" shape, including a first bottom plate 1131, a vertical partition 1132 and a second bottom plate 1133. The first bottom plate 1131 and the second bottom plate 1133 are horizontally arranged, the bottom end of the vertical partition 1132 is connected to one end of the first bottom plate 1131, the top end of the vertical partition 1132 is connected to one end of the second bottom plate 1133, the end of the first bottom plate 1131 away from the vertical partition 1132 is connected to the bottom end of the first side plate 116, and the end of the second bottom plate 1133 away from the vertical partition 1132 is connected to the inner surface of the second side plate 117. The space between the first bottom plate 1131 and the second bottom plate 1133, and between the vertical partition plate 1132 and the second side plate 117, forms the second installation area 112 for installing the DCDC component 20, that is, the first installation area 111 includes the left part and the upper right area of ​​the control box 11, and the second installation area 112 is the lower right area of ​​the control box 11, and the first installation area 111 and the second installation area 112 are isolated from each other by the isolation bottom plate 113. During installation, some electronic components of the high-voltage control circuit can be installed in the area on the left, that is, on the first bottom plate 1131, and the other part can be installed in the upper right area, that is, on the second bottom plate 1133. The DCDC component 20 is located at the lower right position of the control box 11, that is, below the second bottom plate 1133, with an upper and lower layer layout, and the overall space of the control box 11 is reasonably utilized. The DCDC component can be integrated without changing the original high-voltage box size as much as possible, and the structure is compact. In order to facilitate the installation of the DCDC component 20, the front panel 114 and the rear panel 115 do not cover the front and rear ends of the second installation area 112, so that the second installation area 112 is in an inverted "U" shape with both the front and rear ends and the bottom open. After the DCDC component 20 is buckled into the second installation area 112 from the bottom, wiring can be carried out through the front and rear ends, which is convenient to operate. A plurality of threading holes 1134 can be opened on the second bottom plate 1133, and the DCDC module 21 can be connected to the high-voltage control circuit through the threading holes 1134, which is convenient for wiring, the wiring harness is not exposed, and the length of the wiring harness is saved. In this embodiment, the size of the DCDC component 20 is set to match the second installation area 112. After the DCDC component 20 is installed in the second installation area 112, the bottom of the DCDC component 20 is flush with the outer surface of the first bottom plate 1131, so that the entire control box 11 is square in shape, beautiful and stable.

[0030] Please refer to Figure 5, is a schematic diagram of a DCDC component provided by an embodiment of the utility model. The DCDC component 20 includes two DCDC modules 21, a left side plate 22, a third bottom plate 23 and a right side plate 24, the third bottom plate 23 is horizontally arranged, and the two DCDC modules 21 are stacked up and down on the third bottom plate 23, which can reduce the occupied area, the left side plate 22 is vertically connected to the third bottom plate 23 and is close to the left side of the third bottom plate 23, the right side plate 24 is vertically connected to the third bottom plate 23 and is close to the right side of the third bottom plate 23, the two DCDC modules 21 are located between the left side plate 22 and the right side plate 24, and the left and right sides of the two DCDC modules 21 are respectively connected and fixed to the left side plate 22 and the right side plate 24. The DCDC module 21 generates a certain amount of heat during operation. In this embodiment, the left side plate 22 includes a front air diffuser plate 221, a fixed plate 222 and a rear air diffuser plate 223. The fixed plate 222 is located between the front air diffuser plate 221 and the rear air diffuser plate 223. The fixed plate 222 is connected and fixed to the third bottom plate 23 and is slightly away from the side of the third bottom plate 23. The fixed plate 222 is connected and fixed to the DCDC module 21. One end of the front air diffuser plate 221 is connected to the fixed plate 222, and the other end extends obliquely in a direction away from the DCDC module 21. The rear air diffuser plate 223 has the same structure as the front air diffuser plate 221 and is symmetrically arranged. The right side plate 24 has the same structure as the left side plate 22 and is symmetrically arranged. Thus, trumpet-shaped air diffusers are arranged at the front and rear ends of the DCDC component 20 to increase the ventilation volume and facilitate the heat dissipation of the DCDC module 21.

[0031] Specifically, the DCDC assembly 20 also includes a reinforcing strip 27. There are two reinforcing strips 27, which are respectively located at the front and rear ends of the DCDC module 21. The reinforcing strips 27 are respectively connected to the left side plate 22 and the right side plate 24, and are close to the top, thereby increasing the strength of the left side plate 22 and the right side plate 24 to prevent deformation.

[0032] In this embodiment, the bottom ends of the vertical partition 1132 and the second side plate 117 are both provided with a first connecting member 1135, and the corresponding positions on the left and right sides of the third bottom plate 23 are provided with a second connecting member 231, and the DCDC component 20 is bolted to the first connecting member 1135 through the second connecting member 231.

[0033] In this embodiment, the DCDC assembly 20 further includes an air inlet plate 25 and an air outlet plate 26. The air inlet plate 25 is connected to the control box 11 and is located at the front end of the DCDC module 21. The air outlet plate 26 is connected to the control box 11 and is located at the rear end of the DCDC module 21. The air inlet plate 25 and the air outlet plate 26 are provided with a plurality of long strip vents. Air enters from the air inlet plate 25 to dissipate heat for the DCDC module 21 and then flows out from the air outlet plate 26 to dissipate heat. At the same time, the DCDC assembly 20 is protected by the air inlet plate 25 and the air outlet plate 26, and the aesthetics are improved.

[0034] Although the embodiments are described and illustrated separately above, some common technologies are involved. It is the opinion of ordinary technicians in this field that the embodiments can be replaced and integrated. If the content is not clearly recorded in one of the embodiments, reference can be made to another recorded embodiment.

[0035] The above-described implementation methods do not constitute a limitation on the protection scope of the technical solution. Any modification, equivalent replacement and improvement made within the spirit and principle of the above-described implementation methods shall be included in the protection scope of the technical solution.

Claims

1. A high-voltage box with integrated DCDC, applied to energy storage system, characterized in that: include: A control component (10) and a DCDC component (20), wherein the control component (10) comprises a control box (11), the control box (11) is used to install a high-voltage control circuit, the DCDC component (20) comprises a DCDC module (21), the DCDC module (21) is connected to the high-voltage control circuit, and the DCDC component (20) is detachably connected to the control box (11).

2. The high voltage box with integrated DCDC according to claim 1, characterized in that: The control box (11) comprises an isolation bottom plate (113), the top of the control box (11) is provided with an opening, the isolation bottom plate (113) is located at the bottom of the control box (11), the high-voltage control circuit is installed on the isolation bottom plate (113) through the top opening, and the DCDC component (20) is located below the isolation bottom plate (113) and connected to the bottom surface of the isolation bottom plate (113).

3. The high voltage box with integrated DCDC according to claim 2, characterized in that: The control box (11) comprises a front panel (114), a rear panel (115), a first side panel (116) and a second side panel (117); the front panel (114) and the rear panel (115) are respectively arranged at the front and rear ends of the control box (11); the first side panel (116) and the second side panel (117) are respectively arranged at the left and right sides of the control box (11); and the isolation bottom plate (113) is respectively vertically connected to the front panel (114), the rear panel (115), the first side panel (116) and the second side panel (117).

4. The high voltage box with integrated DCDC according to claim 3, characterized in that: The isolation bottom plate (113) comprises a first bottom plate (1131), a vertical partition plate (1132) and a second bottom plate (1133); the first bottom plate (1131) and the second bottom plate (1133) are arranged horizontally; the top end of the vertical partition plate (1132) is connected to the second bottom plate (1133); the bottom end of the vertical partition plate (1132) is connected to the first bottom plate (1131); one end of the first bottom plate (1131) away from the vertical partition plate (1132) is connected to the first side plate (116); and one end of the second bottom plate (1133) away from the vertical partition plate (1132) is connected to the second side plate (117).

5. The high voltage box with integrated DCDC according to claim 4, characterized in that: The bottoms of the vertical partition (1132) and the second side plate (117) are both provided with a first connecting piece (1135), the DCDC component (20) is provided with a second connecting piece (231), the DCDC component (20) is detachably connected to the first connecting piece (1135) via the second connecting piece (231), and the bottom of the DCDC component (20) is flush with the first bottom plate (1131).

6. The high voltage box with integrated DCDC according to claim 5, characterized in that: The second bottom plate (1133) is provided with a threading hole (1134), and the DCDC module (21) is connected to the high-voltage control circuit through the threading hole (1134).

7. The high voltage box with integrated DCDC according to claim 1, characterized in that: The DCDC component (20) comprises a third bottom plate (23), a left side plate (22) and a right side plate (24); the third bottom plate (23) is arranged horizontally; the left side plate (22) and the right side plate (24) are respectively vertically connected to the left and right sides of the third bottom plate (23); the left side surface of the DCDC module (21) is connected to the left side plate (22); and the right side surface of the DCDC module (21) is connected to the right side plate (24).

8. The high voltage box with integrated DCDC according to claim 7, characterized in that: The left side plate (22) comprises a front air diffuser plate (221), a fixed plate (222) and a rear air diffuser plate (223); the fixed plate (222) is connected to the left side of the DCDC module (21); one end of the front air diffuser plate (221) is connected to the fixed plate (222) and the other end is inclined in a direction away from the DCDC module (21); the rear air diffuser plate (223) has the same structure as the front air diffuser plate (221) and is symmetrically arranged; and the right side plate (24) has the same structure as the left side plate (22) and is symmetrically arranged.

9. The high voltage box with integrated DCDC according to claim 8, characterized in that: The DCDC assembly (20) further comprises a reinforcing strip (27), wherein the reinforcing strip (27) is respectively connected to the left side plate (22) and the right side plate (24) and is close to the top of the left side plate (22) and the right side plate (24).

10. The high voltage box with integrated DCDC according to any one of claims 1 to 9, characterized in that: The DCDC component (20) comprises an air inlet plate (25) and an air outlet plate (26), wherein the air inlet plate (25) and the air outlet plate (26) are connected to the control box (11), the air inlet plate (25) is located at the front end of the DCDC module (21), and the air outlet plate (26) is located at the rear end of the DCDC module (21), and the air inlet plate (25) and the air outlet plate (26) are provided with a plurality of ventilation openings.

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