Battery pack high-voltage power distribution device and BDU device

Abstract

The utility model relates to the technical field of BDU devices, and discloses a battery pack high-voltage power distribution device and a BDU device.The battery pack high-voltage power distribution device comprises a shell, a plurality of limiting walls are arranged on the inner wall of the shell, and the limiting walls jointly define a limiting frame; the relay is arranged in the shell and located in the limiting frame, and the relay is bonded with the inner wall of the shell on the inner side of the limiting frame; the clamping part comprises at least two elastic pieces, one end of each elastic piece is connected with the inner wall of the shell, the other end of each elastic piece extends in the direction away from the inner wall of the shell and is provided with a clamping hook, the at least two elastic pieces are distributed on the two opposite sides of the relay, and the clamping hooks face the side where the relay is located. The battery pack high-voltage power distribution device solves the problems that a battery pack high-voltage power distribution device is large in occupied space, installation space of other components is squeezed, assembly operation in a narrow space is tedious, and assembly efficiency is affected.

Description

Technical Field

[0001] The utility model relates to the technical field of BDU devices, in particular to a high-voltage power distribution device for a battery pack and a BDU device. Background Art

[0002] The BDU device (Battery Disconnect Unit) is an important accessory in the electrical circuit of new energy vehicles, and the relay is one of the main electrical components in the BDU device. In the BDU device, the installation position and method of the relay have an important impact on the structural layout of the entire BDU device.

[0003] In the related art, the relay is usually locked to the housing or other components by bolts. In order to cooperate with the bolts, two relatively large mounting feet are usually led out on the side wall of the relay for the bolts to pass through and be tightened.

[0004] However, in the above-mentioned related art, the two relatively large mounting angles and the structures such as bolts and nuts occupy a relatively large space, which will squeeze the installation space of other components, and the assembly operation is relatively cumbersome in the relatively narrow space inside the housing, resulting in more energy and time consumed for assembly. Summary of the Utility Model

[0005] In view of this, the utility model provides a high-voltage power distribution device for a battery pack and a BDU device to solve the problems that the high-voltage power distribution device for a battery pack occupies a large space, squeezes the installation space of other components, and the assembly operation is cumbersome in a narrow space, affecting the assembly efficiency.

[0006] In a first aspect, the utility model provides a high-voltage power distribution device for a battery pack, including: a housing, in which a plurality of limiting walls are formed and extend in a direction away from the inner wall of the housing, and the plurality of limiting walls jointly enclose a limiting frame; a relay, arranged inside the housing and located within the limiting frame, and the relay is bonded to the inner wall of the housing on the inner side of the limiting frame; a clamping part, including at least two elastic pieces, one end of the elastic piece is connected to the limiting wall (201), the other end extends in a direction away from the limiting wall and is provided with a hook, at least two elastic pieces are distributed on opposite sides of the relay, and the hooks respectively face the side where the relay is located. When the relay is assembled within the limiting frame, the hooks abut against the side of the relay away from the inner wall of the housing.

[0007] Beneficial effects: By providing a plurality of limiting walls on the inner wall of the housing to form a limiting frame, a positioning reference is provided for the installation of the relay. At the same time, the relay is connected to the housing by bonding. The limiting frame restricts the position of the relay in the plane where the inner wall of the housing is located, and then the elastic piece and the hook of the clamping part jointly restrict the position of the relay in the direction perpendicular to the inner wall of the housing. The cooperation of bonding jointly ensures the structural strength of the relay installation. At the same time, since the installation of the relay does not require the participation of fasteners such as bolts, the space inside the housing is saved, the extrusion of the installation space of other components is reduced, and at the same time, since there is no need to operate fasteners such as bolts, the assembly operation is simplified and the assembly efficiency is improved.

[0008] In an optional embodiment, the length range of the hook extending from the elastic piece to the side of the relay is 1 mm to 10 mm.

[0009] In an optional embodiment, at least two of the elastic pieces are asymmetrically distributed on opposite sides of the relay.

[0010] In an optional embodiment, a high-voltage conductive busbar is provided in the housing. The high-voltage conductive busbar and a plurality of the limiting walls jointly enclose a limiting frame. A connection end connected to the high-voltage conductive busbar is provided on the side wall of the relay. The connection end is disposed opposite to the high-voltage conductive busbar. When the relay is assembled in the limiting frame, the high-voltage conductive busbar abuts against the connection end.

[0011] In an optional embodiment, welding positioning holes are provided on the high-voltage conductive busbar, and the high-voltage conductive busbar is welded to the connection end.

[0012] In a second aspect, the present invention further provides a BDU device, including: the above-mentioned battery pack high-voltage power distribution device; a circuit board disposed in the housing. In the use state of the BDU device, the circuit board is located on the side of the relay away from the inner wall of the housing.

[0013] Beneficial effects: By adopting the above-mentioned battery pack high-voltage power distribution device, the space occupied by installing the relay in the housing of the BDU device is saved, the assembly operation is simplified, and the assembly efficiency is improved. At the same time, since the circuit board is located above the relay in the working state of the BDU device, it effectively avoids the situation that other electrical components on the circuit board are damaged due to the extrusion of the relay under the action of factors such as gravity.

[0014] In an optional embodiment, the circuit board is disposed perpendicular to the high-voltage conductive busbar. A nickel collecting sheet is provided on the circuit board, and the nickel collecting sheet is welded to the high-voltage conductive busbar.

[0015] In an alternative embodiment, the nickel collection sheet is disposed on the side of the circuit board away from the relay, and the nickel collection sheet bends and extends in the direction of the relay and is connected to the high-voltage conductive bar.

[0016] In an alternative embodiment, a relief groove is provided at the edge of the circuit board, the nickel collection sheet is disposed at the edge of the relief groove on the circuit board close to the inner side of the circuit board, and the portion of the nickel collection sheet extending towards the relay passes through the relief groove.

[0017] In an alternative embodiment, the vertical distance between the portion of the nickel collection sheet passing through the relief groove and extending in the direction of the relay and the outermost circumferential side wall of the circuit board ranges from 3 mm to 6 mm.

[0018] In an alternative embodiment, a connection end is provided on the side of the relay facing the circuit board, a connection hole is provided on the circuit board and penetrates through the circuit board in the thickness direction thereof, and the connection end passes through the connection hole and is connected to the corresponding wiring terminal on the circuit board. Description of the Drawings

[0019] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 It is a schematic diagram of the overall structure of a high-voltage power distribution device for a battery pack according to an embodiment of the present invention;

[0021] Figure 2 It is a schematic diagram of a high-voltage power distribution device for a battery pack according to an embodiment of the present invention for showing the structure of the limiting frame;

[0022] Figure 3 It is a schematic diagram of the positional structure of the circuit board and the high-voltage conductive bar in a BDU device according to an embodiment of the present invention.

[0023] Description of the Reference Numerals:

[0024] 100, housing; 200, limiting frame; 201, limiting wall; 300, relay; 301, connection end; 400, clamping portion; 401, elastic piece; 402, hook; 4021, guiding inclined surface; 500, high-voltage conductive bar; 501, welding positioning hole; 600, circuit board; 601, relief groove; 602, connection hole; 700, nickel collection sheet. Detailed Embodiments

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0026] The following will describe the embodiments of the present utility model in conjunction with Figures 1 to 3 , the embodiments of the present utility model will be described.

[0027] According to an embodiment of the present utility model, on the one hand, a high-voltage power distribution device for a battery pack is provided. Please refer to Figure 1 and Figure 2 , including:

[0028] A housing 100, on which a plurality of limiting walls 201 extend inwardly away from the inner wall of the housing 100, and the plurality of limiting walls 201 together enclose a limiting frame 200; a relay 300, disposed inside the housing 100 and located within the limiting frame 200, and the relay 300 is adhered to the inner wall of the housing 100 on the inner side of the limiting frame 200; a clamping portion 400, including at least two elastic pieces 401, one end of the elastic piece 401 is connected to the limiting wall 201, the other end extends away from the limiting wall 201 and is provided with a hook 402, and the at least two elastic pieces 401 are distributed on opposite sides of the relay 300, and the hooks 402 face the side where the relay 300 is located. When the relay 300 is assembled in the limiting frame 200, the hook 402 abuts against the side of the relay 300 away from the inner wall of the housing 100.

[0029] In this embodiment, by providing a plurality of limiting walls 201 on the inner wall of the housing 100 to form a limiting frame 200, a positioning reference is provided for the installation of the relay 300. At the same time, the relay 300 is connected to the housing 100 by bonding, and the position of the relay 300 in the plane where the inner wall of the housing 100 is located is restricted by the limiting frame 200. Then, the elastic piece 401 and the hook 402 of the clamping portion 400 jointly restrict the position of the relay 300 in the direction perpendicular to the inner wall of the housing 100. The cooperation with bonding jointly ensures the structural strength of the installation of the relay 300. At the same time, since the installation of the relay 300 does not require the participation of fasteners such as bolts, the space inside the body is saved, the extrusion of the installation space of other components is reduced, and at the same time, since there is no need to operate fasteners such as bolts, the assembly operation is simplified and the assembly efficiency is improved.

[0030] It should be noted that in the above embodiment, the inner wall of the housing 100 may be the bottom wall inside the housing 100 or the top wall inside the housing 100 in the working state of the device.

[0031] Specifically, in the above-mentioned embodiment, the specific form of the limit frame 200 is not limited. Each limit wall 201 of the limit frame 200 may be a structure extending upward from the inner wall of the housing 100 and integrally arranged with the inner wall of the housing 100. In some embodiments not shown, each limit wall 201 of the limit frame 200 may also be separately arranged from the housing 100 and installed on the inner wall of the housing 100 by bonding, welding, etc. It should be noted that each limit wall 201 may be of different lengths and arranged discontinuously. In some embodiments not shown, each limit wall 201 may also be connected in sequence to form a continuous limit frame 200. In addition, the limit frame 200 may be semi-enclosed around the installation position of the relay 300, for example, in a "匚" shape. In some embodiments not shown, the limit frame 200 may also be adapted to the contour of the relay 300 and completely surround the relay 300.

[0032] In addition, specifically, the above-mentioned embodiment does not limit the specific form of the clamping portion 400. For example, the elastic sheet 401 extends perpendicular to the inner wall of the shell 100, and a guide slope 4021 is provided on the side of the hook 402 away from the inner wall of the shell 100, so as to facilitate the abutment with the relay 300 during the installation of the relay 300 into the limit frame 200, and guide the hook 402 and the elastic sheet 401 to avoid to the side away from the relay 300 under the pressure of the relay 300. After the relay 300 completely enters the limit frame 200 and reaches the predetermined installation position, the hook 402 rebounds under the action of the elastic sheet 401 due to the loss of the pressure of the relay 300, and finally abuts against the side of the relay 300 away from the inner wall of the shell 100 to achieve positioning. It should be noted that the elastic sheet 401 and the hook 402 of the snap-fit ​​portion 400 can be integrally provided with the shell 100 and extended from the inner wall of the shell 100. In some embodiments not shown, the snap-fit ​​portion 400 can also be separately provided from the shell 100 and connected to the inner wall of the shell 100 by welding, bonding, melting, etc.

[0033] In one embodiment, see Figure 1 and Figure 2 The length of the hook 402 extending from the elastic sheet 401 to one side of the relay 300 is in the range of 1 mm to 10 mm.

[0034] In this embodiment, the range of the length of the hook 402 is controlled to avoid the situation where the hook 402 is too long, making it difficult to press the relay 300 into the limit frame 200. At the same time, it also avoids the situation where the hook 402 is too short, resulting in insufficient limiting ability of the relay 300 after the hook 402 is reset, which affects the firmness of the relay 300.

[0035] In one embodiment, see Figure 2 At least two elastic sheets 401 are asymmetrically distributed on two opposite sides of the relay 300 .

[0036] In this embodiment, by arranging at least two elastic sheets 401 asymmetrically, it is avoided that the limiting effects of the hooks 402 on the relay 300 on the two elastic sheets 401 are concentrated in one place, which may cause the part of the relay 300 that is not limited by the hooks 402 to tilt upward, thereby further improving the stability of the high-voltage distribution device of the battery pack.

[0037] In one embodiment, see Figure 1 and Figure 2 A high-voltage conductive bar 500 is provided in the housing 100, and the high-voltage conductive bar 500 and a plurality of limiting walls 201 are jointly arranged to form a limiting frame 200. A connecting terminal 301 connected to the high-voltage conductive bar 500 is provided on the side wall of the relay 300, and the connecting terminal 301 is arranged opposite to the high-voltage conductive bar 500. When the relay 300 is assembled in the limiting frame 200, the high-voltage conductive bar 500 abuts against the connecting terminal 301.

[0038] In this embodiment, the high-voltage conductive bar 500 and a plurality of limiting walls 201 are jointly arranged to form a limiting frame 200. At the same time, by arranging the connection end 301 on the relay 300 relative to the high-voltage conductive bar 500, after the relay 300 is pressed into the limiting frame 200 and reaches the predetermined assembly position, the connection end 301 is abutted against the high-voltage conductive bar 500 to achieve conduction between the relay 300 and the high-voltage conductive bar 500. Since there is no need to additionally set up a wiring harness to connect the relay 300 to the high-voltage conductive bar 500, the structural integration is improved, and the space utilization rate in the housing 100 is improved, thereby further simplifying the assembly steps of the relay 300 and improving the assembly efficiency.

[0039] In one embodiment, see Figure 1 and Figure 2 A welding positioning hole 501 is provided on the high-voltage conductive bar 500 , and the high-voltage conductive bar 500 is welded to the connection end 301 .

[0040] In this embodiment, a welding positioning hole 501 is provided on the high-voltage conductive bus 500, and the high-voltage conductive bus 500 is fixedly connected to the connection end 301 by welding, thereby improving the reliability of the conduction between the relay 300 and the high-voltage conductive bus 500, reducing the possibility of poor contact, and further improving the stability of the assembly of the relay 300.

[0041] According to an embodiment of the present utility model, on the other hand, a BDU device is also provided. Figure 3, including: the above-mentioned high-voltage power distribution device of the battery pack; a circuit board 600, which is arranged inside the housing 100. In the operating state of the BDU device, the circuit board 600 is located on the side of the relay 300 away from the inner wall of the housing 100.

[0042] In this embodiment, by adopting the above-mentioned high-voltage power distribution device of the battery pack, the space occupied by installing the relay 300 inside the housing 100 of the BDU device is saved. At the same time, the assembly operation is simplified, and the assembly efficiency is improved. Also, since the circuit board 600 is located above the relay 300 in the operating state of the BDU device, it effectively avoids the situation where the relay 300 squeezes other electrical components on the circuit board 600 under the action of factors such as gravity, resulting in damage to the electrical components.

[0043] In one embodiment, please refer to Figure 3 , the circuit board 600 is vertically arranged with the high-voltage conductive busbar 500. A collecting nickel sheet 700 is arranged on the circuit board 600, and the collecting nickel sheet 700 is welded to the high-voltage conductive busbar 500.

[0044] In this embodiment, by arranging the collecting nickel sheet 700 on the circuit board 600 and making the collecting nickel sheet 700 contact the high-voltage conductive busbar 500, the circuit board 600 is directly conducted with the high-voltage conductive busbar 500, further reducing the dependence on the wire harness, which is beneficial to improving the integration degree and the structural compactness, and further improving the assembly efficiency.

[0045] In one embodiment, please refer to Figure 3 , the collecting nickel sheet 700 is arranged on the side of the circuit board 600 away from the relay 300. The collecting nickel sheet 700 bends and extends towards the relay 300 and is connected to the high-voltage conductive busbar 500.

[0046] In this embodiment, specifically, the collecting nickel sheet 700 extends along a direction parallel to the board surface of the circuit board 600 from the surface of the side of the circuit board 600 away from the relay 300, and bends towards the side where the relay 300 is located on the circuit board 600 and then continues to extend, so as to be connected to the high-voltage conductive busbar 500. By arranging the collecting nickel sheet 700 on the side of the circuit board 600 away from the relay 300, the space utilization rate is improved, and it is prevented that the collecting nickel sheet 700 before bending interferes with other structures during the installation of the circuit board 600, thus facilitating the assembly of the circuit board 600.

[0047] In one embodiment, please refer to Figure 3 , a relief groove 601 is provided at the edge of the circuit board 600. The collecting nickel sheet 700 is arranged at the edge of the relief groove 601 on the circuit board 600 close to the inner side of the circuit board 600. The part of the collecting nickel sheet 700 extending towards the relay 300 passes through the relief groove 601.

[0048] In this embodiment, by arranging the nickel collection sheet 700 at the edge of the relief groove 601, the total length of the nickel collection sheet 700 is reduced, and the risk of short circuit is lowered. At the same time, by providing the relief groove 601 and enabling the nickel collection sheet 700 to pass through the relief groove 601 after being bent and extend towards the relay 300, the nickel collection sheet 700 is protected by the edge contour of the circuit board 600, preventing the nickel collection sheet 700 from being interfered with by other components and avoiding damage or short circuit.

[0049] In one embodiment, please refer to Figure 3 , the vertical distance range between the part of the nickel collection sheet 700 extending towards the relay 300 and the outermost circumferential side wall of the circuit board 600 is 3 mm to 6 mm.

[0050] In this embodiment, specifically, after the nickel collection sheet 700 extends along a direction parallel to the circuit board 600 and bends 90 degrees from the relief groove 601 towards the side where the relay 300 is located and then continues to extend and pass through the relief groove 601, this part is the part of the nickel collection sheet 700 extending towards the relay 300. It should be noted that the outer edge of the circuit board 600 specifically refers to the outer edge contour of the part of the circuit board 600 where there is no relief groove 601. By controlling the distance between the part of the nickel collection sheet 700 extending towards the relay 300 and the outer contour of the circuit board 600, it is avoided that the distance is too small, causing the nickel collection sheet 700 to be too close to the components on the circumferential side of the circuit board 600, which is likely to cause damage during the assembly process and short circuit during use. At the same time, it is also avoided that the distance is too large, resulting in interference between the nickel collection sheet 700 and the high-voltage copper busbar or the relay 300 and affecting the assembly efficiency.

[0051] In one embodiment, please refer to Figure 1 and Figure 3 , a connection end 301 is provided on the side of the relay 300 facing the circuit board 600, a connection hole 602 is provided on the circuit board 600 and penetrates through the circuit board 600 in the thickness direction of the circuit board 600, and the connection end 301 passes through the connection hole 602 and is connected to the corresponding wiring terminal on the circuit board 600.

[0052] In this embodiment, specifically, the connection end 301 serves as the connection end 301 for the electrical connection between the relay 300 and the circuit board 600. By providing the connection hole 602 on the circuit board 600, the connection end 301 passes through the connection hole 602 and is electrically connected to the corresponding component on the circuit board 600, making the assembly structure more compact, reducing the dependence on wire harness connection, simplifying the installation and power connection steps, and thus improving the assembly efficiency.

[0053] Although embodiments of the present utility model have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present utility model, and such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A high-voltage power distribution device for a battery pack, characterized in that, Comprising: A housing (100) in which a plurality of limiting walls (201) extend inwardly away from the inner wall of the housing (100), and the plurality of limiting walls (201) jointly enclose a limiting frame (200); A relay (300) disposed inside the housing (100) and within the limiting frame (200), and the relay (300) is adhesively bonded to the inner wall of the housing (100) on the inner side of the limiting frame (200); A clamping portion (400) includes at least two elastic pieces (401), one end of the elastic piece (401) is connected to the limiting wall (201), the other end extends in a direction away from the limiting wall (201) and is provided with a hook (402), at least two of the elastic pieces (401) are distributed on opposite sides of the relay (300), and the hooks (402) face the side where the relay (300) is located. When the relay (300) is assembled within the limiting frame (200), the hooks (402) abut against the side of the relay (300) away from the inner wall of the housing (100).

2. The high-voltage power distribution device for a battery pack according to claim 1, wherein The length range of the hook (402) extending from the elastic piece (401) towards the relay (300) side is 1 mm to 10 mm.

3. The high-voltage power distribution device for a battery pack according to claim 1, characterized in that At least two of the elastic pieces (401) are asymmetrically distributed on opposite sides of the relay (300).

4. The high-voltage power distribution device for a battery pack according to claim 1, characterized in that A high-voltage conductive bar (500) is provided inside the housing (100), and the high-voltage conductive bar (500) and the plurality of limiting walls (201) jointly enclose a limiting frame (200). A connection end (301) connected to the high-voltage conductive bar (500) is provided on the side wall of the relay (300), and the connection end (301) is disposed opposite to the high-voltage conductive bar (500). When the relay (300) is assembled within the limiting frame (200), the high-voltage conductive bar (500) abuts against the connection end (301).

5. The high-voltage power distribution device of the battery pack according to claim 4, characterized in that, Welding positioning holes (501) are provided on the high-voltage conductive bar (500), and the high-voltage conductive bar (500) is welded to the connection end (301).

6. A BDU device, characterized in that, Comprising: The relay (300) assembly structure according to any one of claims 1 to 5; A circuit board (600) disposed inside the housing (100), and in the use state of the BDU device, the circuit board (600) is located on the side of the relay (300) away from the inner wall of the housing (100).

7. The BDU device according to claim 6, characterized in that, The circuit board (600) is disposed perpendicular to the high-voltage conductive bar (500). A collecting nickel sheet (700) is provided on the circuit board (600), and the collecting nickel sheet (700) is welded to the high-voltage conductive bar (500).

8. The BDU device according to claim 7, characterized in that, The collecting nickel sheet (700) is provided on the side of the circuit board (600) away from the relay (300), and the collecting nickel sheet (700) bends and extends towards the relay (300) and is connected to the high-voltage conductive bar (500).

9. The BDU device according to claim 8, wherein A relief groove (601) is provided at the edge of the circuit board (600). The collecting nickel sheet (700) is disposed at the edge of the relief groove (601) on the circuit board (600) close to the inner side of the circuit board (600), and the portion of the collecting nickel sheet (700) extending towards the relay (300) passes through the relief groove (601).

10. The BDU device according to claim 9, wherein The vertical distance range between the portion of the collecting nickel sheet (700) passing through the relief groove (601) and extending in the direction of the relay (300) and the outermost peripheral side wall of the circuit board (600) is 3 mm to 6 mm.

11. The BDU device according to claim 6, wherein A connection end (301) is provided on one side of the relay (300) facing the circuit board (600). A connection hole (602) is provided on the circuit board (600) and penetrates through the circuit board (600) in the thickness direction. The connection end (301) passes through the connection hole (602) and is connected to the corresponding terminal on the circuit board (600).

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