Connecting structure and high-voltage distribution box

Abstract

The utility model relates to a connection structure and a high-voltage distribution box, the connection structure comprises a bottom shell, a current-carrying member and a plurality of components, two ends of the current-carrying member are defined as a first end and a second end respectively, the first end and the second end of the current-carrying member are assembled and electrically connected to different components respectively, and the first end and the second end of the current-carrying member are arranged along the direction from the first end to the second end. The current-carrying piece is wound at the bottom of one component from one side wall of the component and extends to the other side wall of the same component, or the current-carrying piece is wound at the bottoms of the multiple components from the side wall of one component and extends to the side wall of the other component; the bottom shell is provided with an assembling groove, the bottom wall of the assembling groove is provided with a through hole penetrating through the bottom shell, and the current carrying piece is clamped in the through hole so that the bottom of the component can be attached to the bottom wall of the assembling groove. According to the connection structure and the high-voltage distribution box provided by the invention, the problem that thermal runaway is easy to occur in an existing current carrier is solved.

Description

Technical Field

[0001] The present application relates to the technical field of distribution boxes, and in particular to a connection structure and a high-voltage distribution box. Background Art

[0002] As the proportion of new energy electric vehicles in the market continues to rise, the design requirements for high-voltage distribution boxes, as a key component of the battery pack, are becoming increasingly stringent. The high-voltage distribution box is a highly integrated device that integrates the BMS control module, battery pack power distribution module, high-voltage circuit protection module, and other modules.

[0003] Furthermore, the high-voltage distribution box usually connects various high-voltage devices through carriers (including copper bars, aluminum bars, etc.) and conducts each high-voltage device. Since the carrier generally has a certain resistance value, the greater the current, the more obvious the heating effect of the carrier. If the heat cannot be dissipated in time, it may cause circuit failure or even thermal runaway in the entire high-voltage distribution box. Utility Model Content

[0004] Based on this, it is necessary to provide a connection structure and a high-voltage distribution box to solve the problem that the existing carrier current is prone to thermal runaway.

[0005] The connection structure provided in the present application includes a bottom shell, a current-carrying member and multiple components, and the two ends of the current-carrying member are defined as a first end and a second end respectively. The first end and the second end of the current-carrying member are respectively assembled and electrically connected to different components. Along the direction from the first end to the second end, the current-carrying member is wrapped around the bottom of the component from one side wall of one component and extends to the other side wall of the same component, or, the current-carrying member is wrapped around the bottom of multiple components from the side wall of one component and extends to the side wall of another component; the bottom shell is provided with an assembly groove, and the bottom wall of the assembly groove is provided with a through hole passing through the bottom shell, and the current-carrying member is clamped in the through hole so that the bottom of the component can be attached to the bottom wall of the assembly groove.

[0006] In one embodiment, the components are detachably mounted on the assembly groove of the bottom shell.

[0007] In one embodiment, the assembly groove is provided with a first connecting plate and a second connecting plate respectively extending in a direction away from the bottom wall thereof, the first connecting plate is provided with a first upper buckle at one end away from the bottom wall of the assembly groove, the second connecting plate is provided with a second upper buckle at one end away from the bottom wall of the assembly groove, the outer peripheral side of the component is provided with a first lower buckle and a second lower buckle, the end of the first connecting plate with the first upper buckle and the end of the second connecting plate with the second upper buckle can be elastically deformed in a direction away from each other, so that the first upper buckle can be stopped at the side of the first lower buckle away from the bottom wall of the assembly groove, and the second upper buckle can be stopped at the side of the second lower buckle away from the bottom wall of the assembly groove.

[0008] In one embodiment, the components are welded to the assembly grooves of the bottom shell.

[0009] In one embodiment, the connection structure further includes a surrounding plate, which is arranged around the circumference of the assembly groove, and one end of the surrounding plate is fixedly connected to the bottom shell, and the other end extends in a direction away from the bottom wall of the assembly groove.

[0010] In one embodiment, the enclosure includes a plurality of split plates distributed along the circumference of the assembly groove, and adjacent split plates are spaced apart to form installation gaps.

[0011] In one embodiment, the components include a branch circuit load protection unit, which includes a plurality of branch units arranged in parallel. The bottom shell is also provided with a plurality of partition plates arranged in parallel. Adjacent partition plates are spaced apart to form a limiting groove. One end of the partition plate is fixedly connected to the bottom shell, and the other end extends in a direction away from the bottom wall of the limiting groove. Each limiting groove is used to assemble a corresponding branch unit.

[0012] In one embodiment, the coverage area A of the through hole on the bottom wall of the assembly groove and the area B of the bottom wall of the assembly groove satisfy A / B≤1 / 2.

[0013] In one embodiment, the connection structure further includes a shunt member, and one end of the current-carrying member is electrically connected to a plurality of components through the shunt member.

[0014] The present application also provides a high-voltage distribution box, which includes the connection structure described in any one of the above embodiments.

[0015] Compared to the prior art, the connection structure and high-voltage distribution box provided by this application, firstly, by providing a through hole, the portion of the current-carrying component protruding from the bottom wall of the component can be accommodated within the through hole, thereby preventing the current-carrying component from affecting the stable fit between the component and the bottom wall of the assembly slot. Furthermore, the through hole can also play a certain role in limiting the current-carrying component, preventing displacement of the current-carrying component and the component. Therefore, by providing a through hole in the bottom wall of the assembly slot, not only is the structure more simplified, but the volume of the connection structure can also be significantly reduced, which is conducive to the miniaturization of the high-voltage distribution box.

[0016] Furthermore, because the through hole passes through the bottom shell, the heat of the current-carrying component can be dissipated through the through hole to the atmosphere outside the bottom shell or to the liquid cooling plate, that is, it is beneficial to the heat dissipation of the current-carrying component. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A schematic diagram of the connection structure of an embodiment provided in this application;

[0019] Figure 2 An exploded view of a connection structure according to an embodiment of the present application;

[0020] Figure 3 A schematic diagram of a partial structure of a connection structure according to an embodiment of the present application;

[0021] Figure 4 A partial cross-sectional view of a connection structure according to an embodiment of the present application.

[0022] Figure numerals: 100, bottom shell; 110, assembly groove; 111, first connecting plate; 112, first upper buckle; 113, second connecting plate; 114, second upper buckle; 120, through hole; 130, partition plate; 131, limit groove; 200, current-carrying part; 300, component; 310, first lower buckle; 320, second lower buckle; 330, relay; 340, main circuit load protection unit; 350, branch circuit load protection unit; 351, branch unit; 400, enclosure; 410, partition plate; 420, installation notch; 500, diverter. DETAILED DESCRIPTION

[0023] As the proportion of new energy electric vehicles in the market continues to rise, the design requirements for high-voltage distribution boxes, as a key component of the battery pack, are becoming increasingly stringent. The high-voltage distribution box is a highly integrated device that integrates the BMS control module, battery pack power distribution module, high-voltage circuit protection module, and other modules.

[0024] Furthermore, the high-voltage distribution box usually connects various high-voltage devices through carriers (including copper bars, aluminum bars, etc.) and conducts each high-voltage device. Since the carrier generally has a certain resistance value, the greater the current, the more obvious the heating effect of the carrier. If the heat cannot be dissipated in time, it may cause circuit failure or even thermal runaway in the entire high-voltage distribution box.

[0025] See also Figures 1-4In order to solve the problem that existing current carriers are prone to thermal runaway, the present application provides a connection structure and a high-voltage distribution box, which includes a bottom shell 100, a current-carrying part 200 and multiple components 300 (including but not limited to current sensors, relays 330, main circuit load protection units 340 and branch circuit load protection units 350).

[0026] The two ends of the current-carrying member 200 are defined as a first end and a second end, respectively. The first end and the second end of the current-carrying member 200 are respectively assembled and electrically connected to different components 300. Along the direction from the first end to the second end, the current-carrying member 200 is wrapped around one side wall of one of the components 300 to the bottom of the component 300 and extends to the other side wall of the same component 300, or the current-carrying member 200 is wrapped around the side wall of one of the components 300 to the bottom of multiple components 300 and extends to the side wall of another component 300.

[0027] The bottom shell 100 is provided with an assembly groove 110 , and the bottom wall of the assembly groove 110 is provided with a through hole 120 penetrating the bottom shell 100 . The current-carrying member 200 is clamped in the through hole 120 so that the bottom of the component 300 can be attached to the bottom wall of the assembly groove 110 .

[0028] Specifically, the through hole 120 may be square, circular or other shapes, which are not listed here one by one.

[0029] First, by providing the through hole 120, the portion of the current-carrying member 200 that protrudes from the bottom wall of the component 300 can be accommodated within the through hole 120, thereby preventing the current-carrying member 200 from affecting the stable fit between the component 300 and the bottom wall of the assembly groove 110. In addition, the through hole 120 can also play a certain role in limiting the current-carrying member 200, preventing displacement of the current-carrying member 200 and the component 300. Therefore, by providing the through hole 120 in the bottom wall of the assembly groove 110, not only is the structure more simplified, but the volume of the connection structure can also be significantly reduced, which is conducive to the miniaturization of the high-voltage distribution box.

[0030] Furthermore, because the through hole 120 passes through the bottom case 100 , the heat of the current-carrying component 200 can be dissipated to the atmosphere outside the bottom case 100 or to the liquid cooling plate through the through hole 120 , which is beneficial to the heat dissipation of the current-carrying component 200 .

[0031] In one embodiment, the coverage area A of the through hole 120 on the bottom wall of the assembly groove 110 and the area B of the bottom wall of the assembly groove 110 satisfy A / B≤1 / 2.

[0032] Such a configuration can improve the assembly strength of the bottom case 100 and the component 300 and prevent the bottom wall of the assembly groove 110 from being damaged due to the area of ​​the through hole 120 being too large.

[0033] In one embodiment, if Figure 3 and Figure 4 As shown, the component 300 is detachably mounted on the assembly groove 110 of the bottom housing 100 .

[0034] This is beneficial for disassembly and installation of the component 300 and for individual maintenance of the component 300 .

[0035] However, the present invention is not limited thereto. In other embodiments, the component 300 may also be welded to the assembly groove 110 of the bottom case 100 .

[0036] Furthermore, in one embodiment, if Figure 3 and Figure 4 As shown, the assembly groove 110 has a first connecting plate 111 and a second connecting plate 113 on opposite sides extending in a direction away from the bottom wall thereof, a first upper clip 112 is provided at one end of the first connecting plate 111 away from the bottom wall of the assembly groove 110, a first lower clip 310 is provided on the outer peripheral side of the component 300, a second upper clip 114 is provided at one end of the second connecting plate 113 away from the bottom wall of the assembly groove 110, a second lower clip 320 is provided on the outer peripheral side of the component 300, and one end of the first connecting plate 111 with the first upper clip 112 and one end of the second connecting plate 113 with the second upper clip 114 can be elastically deformed in a direction away from each other, so that the first upper clip 112 can be stopped at the side of the first lower clip 310 away from the bottom wall of the assembly groove 110, and the second upper clip 114 can be stopped at the side of the second lower clip 320 away from the bottom wall of the assembly groove 110.

[0037] Specifically, when the component 300 moves toward the bottom wall of the assembly groove 110 and is installed, the first lower clip 310 can push the first upper clip 112 to drive one end of the first connecting plate 111 to elastically deform in the direction away from the second connecting plate 113, and the second lower clip 320 can push the second upper clip 114 to drive one end of the second connecting plate 113 to elastically deform in the direction away from the first connecting plate 111, until the first upper clip 112 stops on the side of the first lower clip 310 away from the bottom wall of the assembly groove 110. At this time, the first upper clip 112 and the bottom wall of the assembly groove 110 jointly limit the component 300 in the height direction, and the second upper clip 114 stops on the side of the second lower clip 320 away from the bottom wall of the assembly groove 110. At this time, the second upper clip 114 and the bottom wall of the assembly groove 110 jointly limit the component 300 in the height direction.

[0038] Such an arrangement facilitates the rapid assembly of the component 300 on the assembly groove 110 and improves the installation efficiency of the connection structure.

[0039] However, the present invention is not limited thereto. In other embodiments, a buckle and a slot may be combined, that is, one of the assembly slot 110 and the component 300 may be provided with a buckle, and the other may be provided with a slot, so that the component 300 can be detachably installed in the assembly slot 110 .

[0040] In one embodiment, if Figure 3 As shown, the connection structure further includes a panel 400 , which is disposed around the assembly slot 110 , and one end of the panel 400 is fixedly connected to the bottom shell 100 , and the other end extends in a direction away from the bottom wall of the assembly slot 110 .

[0041] In this way, the component 300 can be further limited to prevent the component 300 from moving relative to the bottom case 100 .

[0042] Furthermore, in one embodiment, if Figure 3 As shown, the enclosure 400 includes a plurality of split plates 410 distributed circumferentially along the assembly groove 110 , and adjacent split plates 410 are spaced apart to form installation notches 420 .

[0043] By providing the installation notch 420 , installation space for the current-carrying component 200 and the diverter component 500 can be reserved.

[0044] However, the present invention is not limited thereto. In other embodiments, the enclosure 400 may be continuous, and the continuous enclosure 400 can more securely limit the position of the component 300 .

[0045] In one embodiment, if Figure 1 As shown, the connection structure further includes a shunt member 500 , and one end of the current-carrying member 200 is electrically connected to the multiple components 300 through the shunt member 500 .

[0046] Such a configuration can reduce the number of current-carrying components 200 and improve the current-carrying efficiency of the current-carrying components 200 .

[0047] In one embodiment, if Figure 1-Figure 3 As shown, the component 300 includes a branch circuit load protection unit 350, which includes a plurality of branch units 351 arranged in parallel. The bottom shell 100 is also provided with a plurality of partition plates 130 arranged in parallel. Adjacent partition plates 130 are arranged at intervals to form limiting grooves 131. One end of the partition plate 130 is fixedly connected to the bottom shell 100, and the other end extends in a direction away from the bottom wall of the limiting groove 131. Each limiting groove 131 is used to assemble a corresponding branch unit 351.

[0048] In this way, the problem of assembly misalignment can be solved.

[0049] The present application also provides a high-voltage distribution box, which includes the connection structure described in any one of the above embodiments.

[0050] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0051] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of patent protection for the present application shall be determined by the appended claims.

[0052] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0053] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0054] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0055] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0056] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0057] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are intended only to describe specific embodiments and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

Claims

1. A connection structure, characterized in that: The invention comprises a bottom shell (100), a current-carrying member (200) and a plurality of components (300), wherein the two ends of the current-carrying member (200) are respectively a first end and a second end, the first end and the second end of the current-carrying member (200) are respectively assembled and electrically connected to different components (300), and along the direction from the first end to the second end, the current-carrying member (200) is arranged around a side wall of one of the components (300) at the bottom of the component (300) and extends to the other side wall of the same component (300), or the current-carrying member (200) is arranged around a side wall of one of the components (300) at the bottom of a plurality of components (300) and extends to the side wall of another component (300); The bottom shell (100) is provided with an assembly groove (110), the bottom wall of the assembly groove (110) is provided with a through hole (120) penetrating the bottom shell (100), and the current-carrying component (200) is clamped in the through hole (120) so that the bottom of the component (300) can be attached to the bottom wall of the assembly groove (110).

2. The connection structure according to claim 1, characterized in that: The component (300) is detachably mounted on the assembly groove (110) of the bottom shell (100).

3. The connection structure according to claim 2, characterized in that: The assembly groove (110) is provided with a first connecting plate (111) and a second connecting plate (113) on opposite sides thereof, each extending in a direction away from the bottom wall thereof; the first connecting plate (111) is provided with a first upper buckle (112) at one end away from the bottom wall of the assembly groove (110); the second connecting plate (113) is provided with a second upper buckle (114) at one end away from the bottom wall of the assembly groove (110); the outer peripheral side of the component (300) is provided with a first lower buckle (310) and a second lower buckle (320); The first connecting plate (111) is provided with one end of the first upper buckle (112) and the second connecting plate (113) is provided with one end of the second upper buckle (114) which can be elastically deformed in directions away from each other, so that the first upper buckle (112) can be stopped at a side of the first lower buckle (310) away from the bottom wall of the assembly groove (110), and the second upper buckle (114) can be stopped at a side of the second lower buckle (320) away from the bottom wall of the assembly groove (110).

4. The connection structure according to claim 1, characterized in that: The component (300) is welded to the assembly groove (110) of the bottom shell (100).

5. The connection structure according to claim 1, characterized in that: The enclosure (400) is also included. The enclosure (400) is arranged around the circumference of the assembly groove (110), and one end of the enclosure (400) is fixedly connected to the bottom shell (100), and the other end extends in a direction away from the bottom wall of the assembly groove (110).

6. The connection structure according to claim 5, characterized in that: The enclosure plate (400) includes a plurality of split plates (410) distributed circumferentially along the assembly groove (110), and adjacent split plates (410) are spaced apart to form mounting notches (420).

7. The connection structure according to claim 1, characterized in that: The component (300) includes a branch circuit load protection unit (350), and the branch circuit load protection unit (350) includes a plurality of branch units (351) arranged in parallel. The bottom shell (100) is further provided with a plurality of partition plates (130) arranged in parallel. Adjacent partition plates (130) are spaced apart to form limiting grooves (131). One end of the partition plate (130) is fixedly connected to the bottom shell (100), and the other end extends in a direction away from the bottom wall of the limiting groove (131). Each limiting groove (131) is used to assemble a corresponding branch unit (351).

8. The connection structure according to claim 1, characterized in that: The coverage area A of the through hole (120) located on the bottom wall of the assembly groove (110) and the area B of the bottom wall of the assembly groove (110) satisfy A / B≤1 / 2.

9. The connection structure according to claim 1, characterized in that: It also includes a shunt piece (500), and one end of the current-carrying piece (200) is electrically connected to the plurality of components (300) through the shunt piece (500).

10. A high voltage distribution box, characterized in that: The invention comprises a connection structure according to any one of claims 1 to 9.

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