Liquid-cooled high-voltage tank and energy storage battery system
By opening a cavity in the bottom plate of the high-pressure box and passing it into coolant, the problem that the high-pressure box is difficult to maintain sealing during the heat dissipation process is solved, and efficient heat dissipation effect and sealing are achieved.
Patent Information
- Application Number
- CN202421801121.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-26
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-07-26
AI Technical Summary
The existing high-voltage box is difficult to maintain its sealing performance during the heat dissipation process, resulting in poor heat dissipation effect.
A liquid-cooled high-pressure box is designed. By opening a cavity in the bottom plate and cooling liquid is introduced, the cooling liquid uses heat exchange with high-pressure components to achieve efficient heat dissipation while maintaining sealing.
It effectively improves the heat dissipation effect of high-voltage components, maintains the sealing of the high-voltage box, and avoids damage to the heat dissipation device.
Smart Images
Figure CN222928703U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of battery energy storage systems, in particular to a liquid-cooled high-voltage box and an energy storage battery system. Background Art
[0002] The high-voltage box is a device for loading a battery management system, in which high-voltage components for controlling the battery high-voltage system are installed. These high-voltage components will emit a large amount of heat during use. In order to prevent the high-voltage components from being damaged due to overheating, the high-voltage box needs to have good heat dissipation performance, and the high-voltage box also needs good sealing performance.
[0003] In the existing high-voltage boxes, natural heat dissipation is usually adopted, and the heat dissipation effect is low. If the heat dissipation effect is to be improved, heat dissipation ports are often opened or heat dissipation devices such as fans are installed on the box body of the high-voltage box, which will make it difficult for the high-voltage box to have good sealing performance. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a liquid-cooled high-voltage box, which can improve the heat dissipation effect on the premise of ensuring the sealing performance.
[0005] To achieve this purpose, the utility model adopts the following technical solutions:
[0006] A liquid-cooled high-voltage box includes a bottom plate, a cover plate and a frame body. The bottom plate is arranged on one side of the frame body, the cover plate is arranged on the other side of the frame body. The bottom plate, the cover plate and the frame body enclose a cavity for placing high-voltage components. At least part of a cavity for the coolant to flow through is opened in the bottom plate. Part of the high-voltage components are arranged on the bottom plate, and part of the high-voltage components are directly above the cavity for the coolant to flow through. An inlet for introducing the coolant and an outlet for discharging the coolant are opened on the bottom plate, and the inlet, the outlet and the cavity are connected in sequence.
[0007] Preferably, the cavity includes a strong cooling area for cooling the high-voltage components with higher heat generation and a weak cooling area for cooling the high-voltage components with lower heat generation, and the coolant flows through the strong cooling area.
[0008] Preferably, the strong cooling area is provided with a flow channel for the coolant to flow through, the inlet is connected to the outlet through the flow channel, and the flow channel covers the entire strong cooling area.
[0009] Preferably, a plurality of partition strips are arranged in the cavity. Two opposite side surfaces of the partition strips are respectively connected to the bottom surface and the top surface of the cavity, and there is a gap between adjacent two partition strips to form the flow channel.
[0010] Preferably, a boss is provided in the weak cooling area, and two opposite side surfaces of the boss are respectively connected to the bottom surface and the top surface of the cavity.
[0011] Preferably, a liquid outlet pipe and a liquid inlet pipe are provided on the frame body. The liquid outlet pipe is communicated with the outlet, and the liquid inlet pipe is communicated with the inlet.
[0012] Preferably, the frame body includes a plurality of side plates connected in a surrounding manner. The liquid outlet pipe and the liquid inlet pipe are arranged on the same side plate, and the liquid outlet pipe and the liquid inlet pipe are respectively located at two ends in the extending direction of the side plate.
[0013] Preferably, a plurality of support protrusions are provided on the side surface of the bottom plate facing away from the cover plate. The support protrusions are used to create a gap between the bottom plate and the plane on which the liquid-cooled high-voltage box is placed, and / or, a plurality of support plates for improving the strength of the bottom plate are further included.
[0014] Preferably, a sealing strip is filled between the cover plate and the frame body.
[0015] Another object of the present invention is to provide an energy storage battery system, including a battery pack, high-voltage components, and the liquid-cooled high-voltage box as described above. The battery pack is arranged on one side of the liquid-cooled high-voltage box, the high-voltage components are arranged in the liquid-cooled high-voltage box, and the battery pack is electrically connected to the high-voltage components.
[0016] The beneficial effects of the present invention:
[0017] By opening a cavity in the bottom plate and introducing a coolant into the cavity, heat exchange is carried out between the coolant and the high-voltage components in the high-voltage box to achieve the effect of dissipating heat from the high-voltage components. And by continuously injecting coolant with a lower temperature into the cavity through the inlet and making the coolant with a higher temperature that has absorbed the heat of the high-voltage components flow out from the outlet, the effect of keeping the coolant in the cavity at a lower temperature all the time is achieved; there is no need to open heat dissipation holes or install heat dissipation devices such as fans on the bottom plate, the cover plate, and the frame body, ensuring the sealing performance of the cavity surrounded by the bottom plate, the cover plate, or the frame body. Description of the Drawings
[0018] Figure 1 is the overall structural schematic diagram of the embodiment of the liquid-cooled high-voltage box of the present invention;
[0019] Figure 2 is the structural schematic diagram of the embodiment of the liquid-cooled high-voltage box of the present invention after removing the cover plate;
[0020] Figure 3 is the internal structural schematic diagram of the embodiment of the liquid-cooled high-voltage box of the present invention;
[0021] Figure 4 is Figure 3Enlarged view of part A;
[0022] Figure 5 It is a schematic structural diagram of the bottom plate in an embodiment of the liquid-cooled high-voltage box of the present utility model;
[0023] Figure 6 It is a schematic internal structural diagram of the bottom plate in an embodiment of the liquid-cooled high-voltage box of the present utility model;
[0024] Figure 7 It is a schematic overall structural diagram of an embodiment of the energy storage battery system of the present utility model;
[0025] Figure 8 It is a schematic structural diagram of the energy storage battery system of the present utility model after removing the cover plate in an embodiment.
[0026] In the figure: 1. Bottom plate; 101. Upper layer plate; 102. Lower layer plate; 2. Cover plate; 3. Side plate; 4. Cavity; 401. Strong cooling area; 402. Weak cooling area; 5. Cavity; 6. Inlet; 7. Outlet; 8. Connection edge; 9. Isolation strip; 10. Flow channel; 11. Partition strip; 12. Boss; 13. Liquid outlet pipe; 14. Liquid inlet pipe; 15. Support protrusion; 16. Support plate; 17. Sealing strip; 18. High-voltage component. Specific embodiments
[0027] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the sake of description, only parts related to the present utility model are shown in the drawings, rather than all structures.
[0028] Refer to Figure 1 and Figure 2 , which is an embodiment of a liquid-cooled high-voltage box of the present utility model, including a bottom plate 1, a cover plate 2 and a frame; the bottom plate 1 is arranged on one side of the frame, and the cover plate 2 is arranged on the other side of the frame; the bottom plate 1, the cover plate 2 and the frame enclose a cavity 5 for placing high-voltage components 18; a cavity 4 for the coolant to flow through is opened in the bottom plate 1; an inlet 6 for introducing the coolant and an outlet 7 for discharging the coolant are opened on the bottom plate 1, and both the inlet 6 and the outlet 7 are communicated with the cavity 4.
[0029] The housing includes a plurality of side plates 3 that are enclosed and connected. The bottom plate 1, the cover plate 2, and the side plates 3 are all rectangular plates. The bottom plate 1, the cover plate 2, and the side plates 3 form a hollow cuboid. The side plates 3 can be connected to the bottom plate 1 by welding or integrally molding. In this embodiment, the integrally molding method is adopted. After the side plates 3 and the bottom plate 1 are integrally molded, the side plates 3 can be bent upward until they are perpendicular to the bottom plate 1. A part of the top of the side plate 3 is bent toward the cavity 5 to form a connecting edge 8 that fits the cover plate 2. The cover plate 2 is placed on the top of the side plate 3 and abuts against the connecting edge 8. The cover plate 2 and the connecting edge 8 are fixed by bolts, which also facilitates opening the cover plate 2 to repair the high-voltage components 18 inside the high-voltage box. The bottom plate 1 includes an upper layer plate 101 and a lower layer plate 102, and there is a gap between the upper layer plate 101 and the lower layer plate 102, which is the cavity 4. All the high-voltage components 18 are installed on the upper layer plate 101, so heat exchange can be directly carried out with the coolant in the cavity 4 through the upper layer plate 101. The coolant can be a liquid with a relatively large specific heat capacity such as ethylene glycol coolant, glycerol coolant, water, etc. Water is selected in this embodiment. During use, by continuously injecting coolant with a lower temperature into the cavity 4 and allowing the coolant with a higher temperature that has absorbed the heat of the high-voltage components 18 in the cavity 4 to flow out from the outlet 7, the effect of keeping the coolant in the cavity 4 at a relatively low temperature all the time can be achieved.
[0030] Referring to Figure 5 and Figure 6 , in this embodiment, the cavity 4 includes a strong cooling area 401 and a weak cooling area 402; the coolant circulates in the strong cooling area 401.
[0031] Some high-voltage components in the liquid-cooled high-voltage box generate less heat during use, such as circuit breakers. Therefore, these high-voltage components 18 with less heat generation can be placed above the weak cooling area 402; the remaining high-voltage components 18 with more heat generation, such as fuses and pre-charge resistors, are placed above the strong cooling area 401. Such an arrangement can cool down targeted, minimize the use of coolant as much as possible, and achieve the effect of cost savings. Referring to Figure 2 , in this embodiment, the strong cooling area 401 and the weak cooling area 402 each occupy half of the cavity 4, that is, the strong cooling area 401 and the weak cooling area 402 are in a one-to-one ratio. To prevent the coolant from flowing from the weak cooling area 402 into the strong cooling area 401, a partition strip 9 is also provided in the cavity 4. The partition strip 9 is located in the middle of the strong cooling area 401 and the weak cooling area 402 and is arranged along the length direction of the bottom plate 1. The partition strip 9 can be an additional strip-shaped object welded in the cavity 4, or can be formed in the cavity 4 by stamping the lower layer plate 102 of the bottom plate 1. In this embodiment, the partition strip 9 is formed by stamping the lower layer plate 102. The top surface of the partition strip 9 is welded to the upper layer plate 101, thereby separating the strong cooling area 401 and the weak cooling area 402.
[0032] In this embodiment, a flow channel 10 for circulating coolant is provided in the strong cooling area 401; the inlet 6 is communicated with the outlet 7 through the flow channel 10; the flow channel 10 covers the strong cooling area 401.
[0033] Specifically, referring to Figure 5 and Figure 6 , the flow channel 10 is wound along the length direction of the strong cooling area 401 to achieve the effect of traversing the strong cooling area 401. By setting the flow channel 10, the coolant can flow orderly from the inlet 6 to the outlet 7 in the cavity 4, ensuring that the coolant with a lower temperature entering from the inlet 6 can completely traverse the cavity 4 and take out the heat of the high-voltage component 18 in the strong cooling area 401, avoiding the situation that the coolant with a lower temperature enters the cavity 4 from the inlet 6 and directly flows out from the outlet 7, while the coolant with a higher temperature in the cavity 4 does not flow out in time.
[0034] In this embodiment, a plurality of partition strips 11 are provided in the cavity 4. The two opposite side surfaces of the partition strip 11 are respectively connected to the bottom surface and the top surface of the cavity 4, and there is a gap between two adjacent partition strips 11 to form the flow channel 10.
[0035] Specifically, referring to Figures 3 to 6 , the partition strip 11 is arranged in the cavity 4 along the length direction of the bottom plate 1, and the partition strip 11 is parallel to the length direction of the bottom plate 1. The two ends of the partition strip 11 do not contact the inner wall of the cavity 4, so that two adjacent flow channels 10 are in a connected state. The partition strip 11 can be a strip welded to the bottom surface of the cavity 4, or can be formed by stamping the lower layer plate 102 of the bottom plate 1. In this embodiment, the partition strip 11 is formed by stamping the lower layer plate 102 of the bottom plate 1. The top surface of the partition strip 11 is welded to the upper layer plate 101 to ensure that the coolant can only flow into the next flow channel 10 from both ends of the partition strip 11 and will not flow between two adjacent flow channels 10 across the partition strip 11.
[0036] In another embodiment, the flow channel 10 can also be a pipe made of a material with high thermal conductivity such as a copper pipe or a stainless steel pipe, and then the flow channel 10 is closely attached to the upper layer plate 101, aiming to reduce the distance between the flow channel 10 and the high-voltage component 18 and improve the thermal conductivity.
[0037] In this embodiment, a boss 12 is provided in the weak cooling area 402. The two opposite side surfaces of the boss 12 are respectively connected to the bottom surface and the top surface of the cavity 4.
[0038] Specifically, referring to Figures 3 to 6, the boss 12 can be a square-columnar object and welded to the inner bottom surface of the cavity 4, or formed by stamping the lower layer board 102 of the bottom board 1. In this embodiment, the boss 12 is formed by stamping the lower layer board 102 of the bottom board 1. The extending direction of the boss 12 is parallel to the extending direction of the partition strip 11. The boss 12 is arranged along the length direction of the bottom board 1 on the inner bottom surface of the cavity 4. The top surface of the boss 12 abuts against the inner top surface of the cavity 4, so as to be able to provide support for the upper layer board 101 of the bottom board 1 in the weak cooling area 402, avoiding the situation that the upper layer board 101 in the weak cooling area 402 is sunken due to excessive pressure, and at the same time, the upper layer board 101 in the strong cooling area 401 is supported by the partition strip 11.
[0039] In this embodiment, a liquid outlet pipe 13 and a liquid inlet pipe 14 are provided on the side plate 3; the liquid outlet pipe 13 is communicated with the outlet 7; the liquid inlet pipe 14 is communicated with the inlet 6.
[0040] Both the liquid inlet pipe 14 and the liquid outlet pipe 13 pass through the side plate 3 and pass through the upper layer board 101 of the bottom board 1 to communicate with the strong cooling area 401 of the cavity 4. A plurality of interfaces for power lines to pass through or for installing operation buttons are also opened on the side plate 3 provided with the liquid outlet pipe 13 and the liquid inlet pipe 14. In order to avoid affecting the wiring operation of the user or affecting the use of the operation button, it is preferably to arrange the liquid inlet pipe 14 and the liquid outlet pipe 13 at both ends in the length direction of the side plate 3. Specifically, the liquid inlet pipe 14 is arranged at one end close to the weak cooling area 402, and the liquid outlet pipe 13 is located at one end close to the strong cooling area 401. Such an arrangement can make the temperature of the coolant filling the flow channel 10 close to the weak cooling area 402 relatively low. On the one hand, it can assist in reducing the temperature of the weak cooling area 402. On the other hand, since the temperature in the middle part of the entire high-pressure box is higher than that at the edge position, such an arrangement can also improve the heat dissipation effect in the middle part of the high-pressure box.
[0041] In this embodiment, a plurality of support protrusions 15 and several support plates 16 for improving the strength of the bottom board 1 are provided on the side surface of the bottom board 1 facing away from the cover board 2.
[0042] Specifically, the support plate 16 is arranged in a direction perpendicular to the partition strip 11, and the support plate 16 is closely attached to the bottom surface of the bottom plate 1 and fixed by welding. The number of the support plates 16 can be arbitrary. In this embodiment, the number of the support plates 16 is three, and the three support plates 16 are arranged along the extending direction of the partition strip 11, and the distance between two adjacent support plates 16 is equal. The support plate 16 can enhance the structural strength of the bottom plate 1 and prevent the bottom plate 1 from deforming. The support protrusion 15 can be in any form as long as it can support the entire high-voltage box body so that there is a gap between the bottom plate 1 and the plane on which the high-voltage box body is placed, such as columnar, strip-shaped, etc. In this embodiment, the support protrusion 15 is a strip-shaped with a rectangular cross-section, and the support protrusion 15 is arranged on both sides of the bottom plate 1 along the extending direction of the support plate 16, that is, the extending direction of the support protrusion 15 is perpendicular to the extending direction of the support plate 16. By supporting the high-voltage box body with the support protrusion 15, the probability of the bottom plate 1 being scratched can be reduced, and the bottom plate 1 can be further protected.
[0043] In this embodiment, a sealing strip 17 is filled between the cover plate 2 and the side plate 3. The sealing strip 17 is arranged on the connecting edge 8 of the side plate 3 by pasting. When the cover plate 2 covers the side edge, the sealing strip 17 will fill the gap between the cover plate 2 and the connecting edge 8 to achieve the sealing effect. By arranging the sealing strip 17, the waterproof level of the entire high-voltage box can be improved.
[0044] Referring to Figure 7 and Figure 8 , this embodiment also provides an energy storage battery system, including a battery pack (not shown in the figure), high-voltage components 18 and the liquid-cooled high-voltage box as described above. The battery pack is arranged on one side of the liquid-cooled high-voltage box, and the high-voltage components 18 are arranged in the liquid-cooled high-voltage box; the battery pack is electrically connected to the high-voltage components 18. By using the above liquid-cooled high-voltage box to load the high-voltage components 18, the working temperature of the high-voltage components 18 can be better controlled, avoiding the high temperature of the high-voltage components 18, achieving the effect of improving the service life of the high-voltage components 18 and reducing the occurrence of working failures; at the same time, the above liquid-cooled high-voltage box has excellent sealing performance, and can also prevent the high-voltage components 18 from contacting with water, improving the working safety of the high-voltage components 18.
[0045] Obviously, the above embodiments of the present invention are only examples for clearly explaining the present invention, and are not limitations on the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.
Claims
1. A liquid-cooled high-pressure box, characterized in that: It includes a base plate, a cover plate and a frame, the base plate is arranged on one side of the frame, the cover plate is arranged on the other side of the frame, the base plate, the cover plate and the frame form a cavity for placing high-voltage components, the base plate is provided with a cavity for at least part of the cooling liquid to flow, some of the high-voltage components are arranged on the base plate, and some of the high-voltage components are located directly above the cavity for the cooling liquid to flow, the base plate is provided with an inlet for the cooling liquid to enter and an outlet for the cooling liquid to flow out, and the inlet, the outlet and the cavity are connected in sequence.
2. The liquid-cooled high-pressure box according to claim 1, characterized in that: The cavity includes a strong cooling zone for cooling the high-voltage components with a higher heat generation, and a weak cooling zone for cooling the high-voltage components with a lower heat generation, and the coolant flows in the strong cooling zone.
3. The liquid-cooled high-pressure box according to claim 2, characterized in that: The strong cooling zone is provided with a flow channel for circulating the cooling liquid, the inlet is connected with the outlet through the flow channel, and the flow channel covers the entire strong cooling zone.
4. The liquid-cooled high-pressure box according to claim 3, characterized in that: A plurality of partition bars are arranged in the cavity, and two opposite side surfaces of the partition bars are respectively connected to the bottom surface and the top surface of the cavity, and there is a gap between two adjacent partition bars to form the flow channel.
5. The liquid-cooled high-pressure box according to claim 3, characterized in that: A boss is provided in the weak cooling zone, and two opposite side surfaces of the boss are respectively connected to the bottom surface and the top surface of the cavity.
6. The liquid-cooled high-pressure box according to claim 1, characterized in that: The frame is provided with a liquid outlet pipe and a liquid inlet pipe, the liquid outlet pipe is communicated with the outlet, and the liquid inlet pipe is communicated with the inlet.
7. The liquid-cooled high-pressure box according to claim 6, characterized in that: The frame body includes a plurality of side plates that are connected and enclosed. The liquid outlet pipe and the liquid inlet pipe are arranged on the same side plate, and the liquid outlet pipe and the liquid inlet pipe are respectively located at two ends of the extending direction of the side plate.
8. The liquid-cooled high-pressure box according to any one of claims 1 to 7, characterized in that: The side of the bottom plate facing away from the cover plate is provided with a plurality of supporting protrusions, and the supporting protrusions are used to create a gap between the bottom plate and the plane on which the liquid-cooled high-pressure box is placed, and / or, also includes a plurality of supporting plates for improving the strength of the bottom plate.
9. The liquid-cooled high-pressure box according to any one of claims 1 to 7, characterized in that: A sealing strip is filled between the cover plate and the frame body.
10. An energy storage battery system, characterized in that: It includes a battery pack, high-voltage components and a liquid-cooled high-voltage box as described in any one of claims 1 to 9, wherein the battery pack is arranged on one side of the liquid-cooled high-voltage box, the high-voltage components are arranged in the liquid-cooled high-voltage box, and the battery pack is electrically connected to the high-voltage components.