Busbar structure and vehicle

Abstract

The utility model discloses a busbar structure and a vehicle, and the busbar structure can improve the heat dissipation performance, and facilitates the light weight and cost reduction. The busbar structure provided by the utility model comprises a busbar main body part, and the busbar main body part is provided with at least two flow channels extending along the length direction of the busbar main body part; the busbar main body part is also provided with an inlet and an outlet, at least one flow channel is only communicated with the inlet, at least one flow channel is only communicated with the outlet, and the inlet, the outlet and the plurality of flow channels form a loop.

Description

Technical Field

[0001] This application relates to the field of conductor technology, and in particular to a busbar structure and a vehicle. Background Technology

[0002] Busbars are connecting conductors between electronic devices. When used to carry current, busbars generate heat, especially with high currents. To address this, the cross-sectional dimensions of busbars are typically increased to improve heat dissipation. However, large busbar cross-sectional dimensions and weight occupy significant space and are detrimental to weight reduction and cost control. Furthermore, relying on natural heat dissipation makes temperature control difficult. Utility Model Content

[0003] The purpose of this application is to provide a busbar structure and a vehicle, which can improve heat dissipation performance and facilitate weight reduction and cost reduction.

[0004] To solve the above-mentioned technical problems, the busbar structure of this application includes a busbar main body, wherein the busbar main body has at least two flow channels extending along its length direction;

[0005] The main body of the busbar also has an inlet and an outlet, at least one of the flow channels is connected only to the inlet, at least one of the flow channels is connected only to the outlet, and the inlet, the outlet and the plurality of flow channels form a loop.

[0006] Optionally, at least two of the flow channels are simultaneously connected to the inlet; and / or, at least two of the flow channels are simultaneously connected to the outlet.

[0007] Optionally, the busbar main body has a plurality of flow channel groups distributed along the width direction of the busbar main body, and each flow channel group includes at least two flow channels;

[0008] One of the flow channels is simultaneously connected to the inlet, and the other flow channel is simultaneously connected to the outlet.

[0009] Optionally, the busbar body includes two end walls distributed along its length; the busbar body has an inner cavity and a plurality of partition walls that separate the inner cavity to form a plurality of flow channels, the ends of the plurality of partition walls and at least one of the end walls are spaced to form a communicating cavity, and the plurality of flow channels are interconnected through the communicating cavity.

[0010] Optionally, the partition wall has a gap that connects to the inlet or the outlet.

[0011] Optionally, the busbar body includes two ends distributed along its length, with the inlet and the outlet located between the two ends; or, the inlet and the outlet are located at the same end of the busbar body.

[0012] Optionally, the inlet and the outlet are offset along the length of the main body of the busbar.

[0013] Optionally, the busbar main body includes two ends distributed along its length; the busbar structure also includes two connecting ends, the connecting ends are solid structures, the connecting ends are provided with connecting holes, one end of the busbar main body is connected to one connecting end, and the other end of the busbar main body is connected to the other connecting end.

[0014] Optionally, the busbar structure further includes an inlet connector and an outlet connector, wherein the inlet connector is connected to the inlet and the outlet connector is connected to the outlet.

[0015] Optionally, the main body of the busbar includes a busbar body, the flow channel is integrally formed on the busbar body, and the busbar body is an integrally formed structure;

[0016] The busbar body further includes an inner insulation layer that covers the inner surface of the busbar body; and / or, the busbar body further includes an outer insulation layer that covers the outer surface of the busbar body.

[0017] This application also provides a vehicle including the busbar structure described in any of the above claims.

[0018] In this application, the flow channels of the busbar body in the busbar structure are for the flow of coolant. These channels can connect to the cooling pipes supplying the coolant, allowing the coolant to cool the busbar structure and remove the heat generated when the busbar is energized, thereby improving heat dissipation performance. Furthermore, when current is applied, there is no need to increase the cross-sectional area to improve heat dissipation. Under the premise of adequate cooling, a smaller cross-section can still meet high current carrying capacity, correspondingly reducing the weight of the busbar structure, minimizing space occupation, and reducing costs. Vehicles with the aforementioned busbar structure achieve the same technical effects. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the busbar structure in one embodiment of this application;

[0020] Figure 2 for Figure 1 A schematic diagram of the middle busbar structure after removing the inlet and outlet connectors;

[0021] Figure 3 for Figure 2 Top view of the main body of the busbar;

[0022] Figure 4 for Figure 3 A schematic diagram of a cross-section along the AA direction;

[0023] Figure 5 for Figure 2 Top view of the middle busbar structure;

[0024] Figure 6 for Figure 5 Enlarged diagram of part B in the middle;

[0025] Figure 7 This is a schematic diagram of the arrangement of multiple flow channels in the busbar structure in another embodiment of this application;

[0026] Figure 8 The diagram shows the arrangement of multiple flow channels in the busbar structure in another embodiment of this application.

[0027] Figure 9 for Figure 1 Cross-sectional view of the inlet and outlet connector locations;

[0028] Figure 10 for Figure 4 Enlarged diagram of part C in the middle.

[0029] The annotations in the attached figures are explained as follows:

[0030] 10-Busbar structure;

[0031] 101-Busbar main body; 1011-Busbar body; 10111-Separation wall; 10111a-Notch; 10112-End wall; 1012-Inner insulation layer; 1013-Outer insulation layer; 101a-Inlet; 101b-Outlet; 101c-Flow channel; 101d-Connecting cavity; 102-Connecting end; 102a-Connecting hole; 103-Inlet connector; 1031-Inlet connector body; 1032-Inlet connector flange; 104-Outlet connector; 1041-Outlet connector body; 1042-Outlet connector flange. Detailed Implementation

[0032] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] The ordinal numbers used in this article, such as first and second, are used to distinguish different parts with the same name and do not indicate a specific order or primary / secondary relationship.

[0034] Please refer to Figures 1 to 4 , Figure 1This is a schematic diagram of the busbar structure 10 in one embodiment of this application; Figure 2 for Figure 1 A schematic diagram of the middle busbar structure 10 after removing the inlet connector 103 and the outlet connector 104; Figure 3 for Figure 2 Top view of the main body 101 of the middle busbar; Figure 4 for Figure 3 A schematic diagram of a cross-section along the AA direction.

[0035] The busbar structure 10 in this embodiment includes a busbar main body 101, which has at least two flow channels 101c extending along its length. Specifically, the busbar main body 101 includes a busbar body 1011, which is a conductor, such as a high-quality conductive metal material like copper or aluminum. Figure 4 As shown, the busbar body 1011 is a hollow pipe structure with an inner cavity, specifically a hollow flat tube structure. However, this embodiment does not limit the cross-sectional shape of the busbar body 1011. In this embodiment, the inner cavity of the busbar body 1011 has multiple partition walls 10111 extending along its length. The partition walls 10111 divide the inner cavity into multiple flow channels 101c. The busbar body 1011 can be a one-piece molded structure to integrally form the flow channels 101c, for example, a profile structure formed by extruding metal material, or it can be formed by other processes. The length direction of the busbar body 1011 is also the direction in which current flows and conducts within the busbar body 1011. Figure 1 The shape of the busbar structure 10 shown is only one specific embodiment. The busbar structure 10 can also be other structural forms, such as a straight plate structure, an L-shaped structure, a Z-shaped structure, etc. This embodiment does not impose any restrictions.

[0036] It is important to understand that in this embodiment, the flow channel 101c of the busbar body 1011 is used for flowing coolant. That is, the flow channel 101c can be connected to the cooling pipes that provide the coolant. This allows the coolant to cool the busbar structure 10, removing the heat generated when the busbar is energized. The coolant can be water, an aqueous medium, or other liquid media with cooling properties. Based on this, the busbar structure 10 does not need to increase its cross-section to improve heat dissipation. With adequate cooling, a smaller cross-section can still meet high current carrying capacity, thereby reducing the weight of the busbar structure 10, minimizing space occupation, and lowering costs. This effect is particularly pronounced in high-current scenarios, where the busbar structure 10's cooling capacity makes this effect even more significant. The busbar structure 10 can be applied, for example, to the power battery charging device of an electric vehicle, meeting usage requirements with a smaller cross-section and lighter weight during high-rate fast charging of the power battery.

[0037] It is worth noting that the main body 101 of the busbar in this embodiment also has an inlet 101a and an outlet 101b. At least one flow channel 101c is connected only to the inlet 101a, and at least one flow channel 101c is connected only to the outlet 101b. The inlet 101a, the outlet 101b, and the multiple flow channels 101c can form a loop, that is, the coolant can enter the flow channel 101c connected to the inlet 101a, flow to the flow channel 101c connected to the outlet 101b, and finally flow out from the outlet 101b.

[0038] Since part of the flow channel 101c is connected only to the inlet 101a and part of the flow channel 101c is connected only to the outlet 101b, and the flow channel 101c, inlet 101a, and outlet 101b form a loop, the flow channel 101c connected to the outlet 101b is located downstream of the flow channel 101c connected to the inlet 101a. That is, the coolant first flows through the flow channel 101c connected to the inlet 101a and then flows downstream to the flow channel 101c connected to the outlet 101b. In this way, the coolant temperature in the downstream flow channel 101c is relatively high, while the coolant temperature in the upstream flow channel 101c is relatively low. The higher-temperature and lower-temperature coolants are relatively close in the width direction of the busbar body 1011, allowing for heat transfer between them. This reduces the temperature difference of the coolant in different sections along the length direction of the busbar body 1011, resulting in a smaller temperature difference within the busbar body 1011. This allows for more even heat dissipation of the busbar structure 10, improving the heat dissipation effect. The width direction is perpendicular to the length direction.

[0039] In contrast, if only one flow channel is provided, or even if multiple flow channels are provided, but the coolant only flows from one end of the busbar structure to the other, the coolant gradually heats up along the flow direction within the channel, resulting in uneven cooling along the entire length of the busbar structure. Therefore, in this embodiment, multiple flow channels 101c and the aforementioned inlet 101a and outlet 101b are arranged to distribute temperature changes to different locations along the width direction, enabling heat transfer over short distances and improving the temperature uniformity of the coolant within the busbar body 101, thus improving the uniformity of heat dissipation. Furthermore, since at least a portion of the upstream flow channel 101c and at least a portion of the downstream flow channel 101c flow in opposite directions, the counter-current heat exchange effect is increased, further ensuring the uniformity of heat dissipation.

[0040] Can be combined Figure 5 understand, Figure 5 for Figure 2 The top view of the busbar structure 10 and the cross-sectional view of the main body 101 of the busbar are shown, with black and gray arrows indicating the flow direction of the coolant in the flow channel 101c.

[0041] Furthermore, in this embodiment, at least two flow channels 101c are simultaneously connected to the inlet 101a, and at least two flow channels 101c can also be simultaneously connected to the outlet 101b. In this way, at least two flow channels 101c can simultaneously receive coolant with roughly the same temperature distribution, and the other two flow channels 101c can simultaneously receive coolant with roughly the same temperature distribution, which is more conducive to the temperature uniformity after heat conduction in the width direction of multiple flow channels 101c.

[0042] In this embodiment, a total of four flow channels 101c are provided. Figure 5 The four flow channels 101c are sequentially labeled as flow channel 101c1, flow channel 101c2, flow channel 101c3, and flow channel 101c4. Flow channels 101c1 and 101c2 are both connected to the inlet 101a, while flow channels 101c3 and 101c4 are both connected to the outlet 101b. Thus, the coolant temperature distribution in flow channels 101c1 and 101c2 is approximately the same, and the coolant temperature distribution in flow channels 101c3 and 101c4 is also approximately the same.

[0043] In this embodiment, the main body 101 of the busbar can have multiple flow channel groups distributed along the width direction of the main body 101, each flow channel group including at least two flow channels 101c. One flow channel group is simultaneously connected to the inlet 101a, and the other flow channel group is simultaneously connected to the outlet 101b. In this way, the multiple flow channels 101c in a flow channel group are arranged adjacent to each other, which facilitates simultaneous connection with a corresponding inlet 101a or an outlet 101b. Figure 5 In this system, the first flow channel 101c1 and the second flow channel 101c2 form one flow channel group, while the third flow channel 101c3 and the fourth flow channel 101c4 form another flow channel group.

[0044] Furthermore, in this embodiment, the flow channels 101c of two adjacent flow channel groups can be interconnected, which facilitates the formation of a loop. There are several ways to achieve this interconnection; for example, a channel can be provided on the partition wall 10111 between two adjacent flow channels 101c to connect them. Alternatively,... Figure 5 For example, and in combination Figure 6 understand, Figure 6 for Figure 5 Enlarged diagram of part B in the middle.

[0045] The busbar main body 101 includes two end walls 10112 distributed along its length; the busbar main body 101 has an inner cavity and a plurality of partition walls 10111 that divide the inner cavity to form a plurality of flow channels 101c, the plurality of partition walls 10111 and at least one end wall 10112 being spaced to form a communicating cavity 101d, such as Figure 6As shown in the figure. In this way, multiple flow channels 101c are interconnected through the communication cavity 101d. Combining Figure 5 for understanding, Figure 5 the middle partition wall 10111 and the two end walls 10112 are both spaced apart to form the communication cavity 101d. In this way, the ends of each flow channel 101c along the length direction are open, so that the ends of the multiple flow channels 101c are in a mutually connected state. In this way, after the coolant flows into the flow channel 101c connected to the inlet 101a, the coolant can flow out from the end and enter the flow channel 101c connected to the outlet 101b, and then flow out from the outlet 101b to form a loop.

[0046] It can be further referred to Figure 5 for understanding that the bus bar main body 101 includes two ends distributed along the length direction, and the inlet 101a and the outlet 101b are located at positions between the two ends. In this way, after the coolant enters the same flow channel 101c from the inlet 101a, it can flow in the flow channel 101c away from each other in opposite directions, Figure 5 flowing along the first stroke L1 and the second stroke L2 respectively; the coolant can also flow in the same flow channel 101c in opposite directions and converge, Figure 5 flowing along the third stroke L3 and the fourth stroke L4 respectively in opposite directions and converging to the outlet 101b. In this way, for the same flow channel 101c, the coolant flows simultaneously in different sections, so that the temperature difference of the coolant in the same flow channel 101c is reduced.

[0047] Exemplarily, the inlet 101a and the outlet 101b can be staggeredly arranged in the length direction of the bus bar main body 101. In this way, the two strokes of the coolant in the same flow channel 101c are not equal, Figure 5 where L1 < L2 and L3 < L4. In this way, after the coolant enters the first flow channel 101c1 and the second flow channel 101c2, it flows in opposite directions for the first stroke L1 and the second stroke L2. After passing through the first stroke L1, it enters the third flow channel 101c3 and the fourth flow channel 101c4, and then continues to flow for the fourth stroke L4. After passing through the second stroke L2, it enters the third flow channel 101c3 and the fourth flow channel 101c4 and then continues to flow for the third stroke L3. In this way, after passing through the relatively short first stroke L1, the coolant can enter the relatively long fourth stroke L4 for cooling. After passing through the relatively long second stroke L2, the coolant will enter the relatively short third stroke L3 for cooling. It can be seen that in this way, the temperature difference between the flow channel 101c connected to the inlet 101a and the flow channel 101c connected to the outlet 101b can be further reduced.

[0048] It can be known that the arrangement form of the flow channel 101c is not limited to Figure 6 as shown in the figure. For example, as Figure 7 shown in the figure, Figure 7 This is a schematic diagram of the arrangement of multiple flow channels 101c in the busbar structure in another embodiment of this application.

[0049] exist Figure 7 In the illustrated embodiment, two flow channel groups are also provided. One flow channel group is connected to the same inlet 101a, and the other flow channel group is connected to the outlet 101b. However, the inlet 101a and the outlet 101b are located at the same end of the busbar main body 101. The coolant can flow along the length of the busbar main body 101 and then flow in the opposite direction to the outlet 101b for discharge.

[0050] Inlet 101a and outlet 101b are not limited to being connected to multiple flow channels 101c simultaneously; they can also be connected to only one corresponding flow channel 101c. For example... Figure 8 As shown, Figure 8 The diagram below illustrates the arrangement of multiple flow channels 101c in another embodiment of the busbar structure. In this embodiment, the multiple flow channels 101c are connected end to end, forming a reciprocating loop. The coolant flows in opposite directions in two adjacent flow channels 101c, thereby accelerating heat exchange in the width direction to ensure temperature balance.

[0051] It should be understood that the above is merely an exemplary description of the arrangement of the flow channels 101c. Other arrangements are also possible. The number of flow channels 101c is not limited to four. It can be two or more other numbers. As long as the flow direction of at least a portion of the coolant in at least one cooling flow channel is opposite to the flow direction of at least a portion of the coolant in another cooling flow channel, it will facilitate heat transfer in the width direction and improve temperature uniformity.

[0052] You can continue to refer to this. Figure 1 In this embodiment, the busbar main body 101 includes two ends distributed along its length. The busbar structure 10 also includes a connecting end 102. One end of the busbar main body 101 is connected to a connecting end 102, and the other end of the busbar main body 101 is connected to another connecting end 102. The connecting end 102 is, for example, a high-quality conductive metal material such as copper or aluminum, and is used for electrical connection with external devices. The connecting end 102 can be welded to the busbar main body 101, for example. As mentioned above, the busbar main body 101 is a hollow pipe structure to facilitate the flow and heat dissipation of coolant. Here, the connecting end 102, which is electrically connected to external devices, is set separately. Therefore, the connecting end 102 can be set as a solid structure, which can have higher strength for a more reliable connection with external devices. Figure 1 In the middle, the connecting end 102 is provided with a connecting hole 102a, which can be connected to external devices by fasteners inserted into the connecting hole 102a. For example, the fastener is a fastening screw, and the strength of the solid connecting end 102 can meet the strength requirements of the fastening screw.

[0053] like Figure 9 As shown, Figure 9 for Figure 1 Cross-sectional view of the positions of inlet connector 103 and outlet connector 104.

[0054] The busbar structure 10 in this embodiment also includes an inlet connector 103 and an outlet connector 104. The inlet connector 103 is connected to the inlet 101a, and the outlet connector 104 is connected to the outlet 101b. The inlet connector 103 and the outlet connector 104 facilitate connection with the cooling pipes supplying coolant. Specifically, the inlet connector 103 and the outlet connector 104 can be welded or bonded to the main body 101 of the busbar, respectively. This connection method is relatively simple and reliable. Figure 7 In the process, the inlet connector 103 includes an inlet connector body 1031 and an inlet connector flange 1032, and the outlet connector 104 includes an outlet connector body 1041 and an outlet connector flange 1042. During connection, the inlet connector flange 1032 and the outlet connector flange 1042 can be welded or bonded to the busbar body 101, respectively. Using flange connections allows for a larger contact area and improves connection reliability. Additionally, as... Figure 9 As shown, the partition wall 10111 can be provided with a notch 10111a, so that the inlet 101a or the outlet 101b can be connected to the notch 10111a, thereby better connecting the two adjacent flow channels 101c. When processing the inlet 101a or the outlet 101b, it can be formed at the position of the partition wall 10111 by cutting, milling or other methods.

[0055] You can continue to refer to this. Figure 10 understand, Figure 10 for Figure 4 Enlarged diagram of part C in the middle.

[0056] In this embodiment, the busbar main body 101 further includes an inner insulating layer 1012, which covers the inner surface of the busbar body 1011 and can thus cover the wall of the flow channel 101c. Thus, when the coolant is conductive, the inner insulating layer 1012 acts as an insulator, ensuring the safety of the coolant flowing within the busbar main body 101. Of course, if the coolant is not conductive, the inner insulating layer 1012 may not be provided. The busbar main body 101 may also include an outer insulating layer 1013, which covers the outer surface of the busbar body 1011, further improving the safety of the busbar structure 10.

[0057] This application also provides a vehicle including the busbar structure described in any of the above claims. The vehicle is equipped with various electronic devices, and the connections between these electronic devices can be made via the busbar structure. Because the vehicle has the busbar structure described above, it achieves the same technical effects as the embodiments described above.

[0058] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A busbar structure, characterized in that, The busbar structure includes a busbar main body (101) having at least two flow channels (101c) extending along its length. The main body (101) of the busbar also has an inlet (101a) and an outlet (101b), at least one of the flow channels (101c) is connected only to the inlet (101a), at least one of the flow channels (101c) is connected only to the outlet (101b), and the inlet (101a), the outlet (101b) and the plurality of flow channels (101c) form a loop.

2. The busbar structure according to claim 1, characterized in that, At least two of the flow channels (101c) are simultaneously connected to the inlet (101a); and / or, at least two of the flow channels (101c) are simultaneously connected to the outlet (101b).

3. The busbar structure according to claim 2, characterized in that, The main body of the busbar (101) has a plurality of flow channel groups distributed along the width direction of the main body of the busbar (101), and each flow channel group includes at least two flow channels (101c). One of the flow channels is simultaneously connected to the inlet (101a), and the other flow channel is simultaneously connected to the outlet (101b).

4. The busbar structure according to claim 3, characterized in that, The busbar main body (101) includes two end walls (10112) distributed along its length; the busbar main body (101) has an inner cavity and a plurality of partition walls (10111) that separate the inner cavity to form a plurality of flow channels (101c), the ends of the plurality of partition walls (10111) and at least one of the end walls (10112) are spaced to form a connecting cavity (101d), and the plurality of flow channels (101c) are interconnected through the connecting cavity (101d).

5. The busbar structure according to claim 4, characterized in that, The partition wall (10111) has a gap that connects to the inlet (101a) or the outlet (101b).

6. The busbar structure according to any one of claims 1-5, characterized in that, The busbar main body (101) includes two ends distributed along its length, with the inlet (101a) and the outlet (101b) located between the two ends; or, the inlet (101a) and the outlet (101b) are located at the same end of the busbar main body (101).

7. The busbar structure according to claim 6, characterized in that, The inlet (101a) and the outlet (101b) are offset along the length of the main body (101) of the busbar.

8. The busbar structure according to any one of claims 1-5, characterized in that, The main body of the busbar (101) includes two ends distributed along its length; the busbar structure (10) also includes two connecting ends (102), the connecting ends (102) are solid structures, the connecting ends (102) are provided with connecting holes (102a), one end of the main body of the busbar (101) is connected to one connecting end (102), and the other end of the main body of the busbar (101) is connected to the other connecting end (102).

9. The busbar structure according to any one of claims 1-5, characterized in that, The busbar structure (10) further includes an inlet connector (103) and an outlet connector (104), wherein the inlet connector (103) is connected to the inlet (101a) and the outlet connector (104) is connected to the outlet (101b).

10. The busbar structure according to any one of claims 1-5, characterized in that, The main body (101) of the busbar includes a busbar body (1011), the busbar body (1011) is provided with the flow channel (101c), and the busbar body (1011) is an integrally formed structure; The busbar main body (101) further includes an inner insulation layer (1012) that covers the inner surface of the busbar body (1011); and / or, the busbar main body (101) further includes an outer insulation layer (1013) that covers the outer surface of the busbar body (1011).

11. A vehicle, characterized in that, Includes the busbar structure as described in any one of claims 1-10.

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