Distributed BDU

Abstract

The utility model discloses a distributed BDU, which comprises a main fuse, a main relay, a heating fuse, a heating relay, a pre-charging relay, a pre-charging resistor, a metal plate support, a metal plate and a metal plate, the main fuse, the main relay, the heating fuse, the heating relay, the pre-charging relay and the pre-charging resistor are separately and detachably installed on the metal plate support. According to the utility model, the electrical parts are separately and detachably mounted on the metal plate bracket, so that the production manufacturing cost and the maintenance cost are greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile batteries, in particular to a distributed BDU. Background Art

[0002] The Battery Energy Distribution Unit (BDU) is a critical component in the high-voltage circuit of electric vehicles, controlling functions such as power on / off, pre-charging, charging / discharging, and heating. The BDU components within the battery pack of a popular low-capacity electric vehicle from a well-known domestic OEM are a main relay, pre-charging relay, pre-charging resistor, heating relay, and heating fuse, all housed in a PA66+GF25 upper and lower housing.

[0003] However, the integrated BDU has the following disadvantages:

[0004] 1. The integrated BDU needs to be encapsulated in a housing and requires additional high and low voltage connectors for integrated wiring, which is very costly.

[0005] 2. If a problem occurs with the integrated BDU, it is impossible to view the internal status of the BDU, and it is not convenient to troubleshoot a specific component to confirm the cause of the problem;

[0006] 3. If a component needs to be replaced, the entire BDU needs to be replaced, which results in high maintenance costs;

[0007] 4. Integrated BDUs require more materials, and the supplier procurement and production processes are long, resulting in a longer delivery cycle. Summary of the Invention

[0008] In view of the above problems existing in the existing integrated BDU, the present invention aims to provide a distributed BDU with low cost, easy troubleshooting and maintenance, and short supply cycle.

[0009] The specific technical solutions are as follows:

[0010] A distributed BDU includes a main fuse, a main relay, a heating fuse, a heating relay, a pre-charge relay, and a pre-charge resistor, and also includes: a sheet metal bracket, on which the main fuse, the main relay, the heating fuse, the heating relay, the pre-charge relay, and the pre-charge resistor are separately and detachably mounted.

[0011] As a further improvement and optimization of this solution, the main fuse and the main relay are distributed laterally, and the pre-charging resistor, the pre-charging relay, the heating relay, and the heating fuse are located on one side of the main fuse and are distributed laterally in sequence.

[0012] As a further improvement and optimization of this solution, the main fuse is electrically connected to a first copper busbar for connecting to the total positive of the PACK, the main relay is electrically connected to a second copper busbar for connecting to the discharge positive pole and the slow charging positive pole, and the main relay and the main fuse are electrically connected through a third copper busbar.

[0013] As a further improvement and optimization of this solution, the first copper bar and the main fuse, the second copper bar and the main relay, the third copper bar and the main relay, and the third copper bar and the main fuse are all detachably connected by screws.

[0014] As a further improvement and optimization of this solution, the main relay, the heating fuse, the heating relay, the pre-charge relay, and the pre-charge resistor are all individually and detachably mounted on the sheet metal bracket by screws.

[0015] As a further improvement and optimization of this solution, the main fuse and the pre-charging resistor, the pre-charging resistor and the pre-charging relay, the pre-charging relay and the main relay, the heating relay and the main relay, and the heating relay and the heating fuse are all electrically connected through cables.

[0016] As a further improvement and optimization of this solution, the sheet metal bracket is provided with a plurality of weight-reducing holes.

[0017] As a further improvement and optimization of this solution, the weight-reducing hole is a rectangular hole.

[0018] As a further improvement and optimization of this solution, the sheet metal bracket is provided with a wire harness fixing tie.

[0019] As a further improvement and optimization of this solution, connection holes are provided at one end of the first copper bar away from the main fuse and at one end of the second copper bar away from the main relay.

[0020] Compared with the prior art, the above technical solution has the following positive effects:

[0021] (1) In the present invention, the electrical components are assembled on the sheet metal bracket, and no shell packaging and additional connector integration are required, which reduces the cost.

[0022] (2) The status of each electrical component in the present invention is clear at a glance. If the wiring harness is connected incorrectly or missing, it can be quickly found out, and it is convenient for maintenance personnel to confirm and check the status of a certain electrical component.

[0023] (3) In the present invention, since each electrical component is individually and detachably mounted on a sheet metal bracket, when a certain electrical component needs to be replaced, the corresponding electrical component can be directly removed and replaced without replacing the entire BDU, which is convenient, fast and has low maintenance costs.

[0024] (4) In the present invention, only electrical components and brackets need to be purchased, eliminating the supplier packaging and integration process and shortening the delivery cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a structural diagram of a distributed BDU of the utility model;

[0026] Figure 2 This is a top view of a distributed BDU of the present invention;

[0027] In the attached figure: 1. Sheet metal bracket; 2. Main fuse; 3. Main relay; 4. First copper bar; 5. Third copper bar; 6. Second copper bar; 7. Pre-charge resistor; 8. Pre-charge relay; 9. Heating relay; 10. Heating fuse; 11. Weight reduction hole; 20. Wire harness fixing tie. DETAILED DESCRIPTION

[0028] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0029] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like are used to indicate positions or locations based on those shown in the accompanying drawings. These terms are intended solely to facilitate the description of this utility model and to simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used solely for descriptive purposes and should not be construed as indicating or implying relative importance.

[0030] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0031] Figure 1 This is a structural diagram of a distributed BDU in the utility model. Figure 2 This is a top view of a distributed BDU of the present invention, as shown in FIG. Figure 1-2 As shown, a distributed BDU of a preferred embodiment is shown, including a main fuse 2, a main relay 3, a heating fuse 10, a heating relay 9, a pre-charge relay 8, and a pre-charge resistor 7, and also includes: a sheet metal bracket 1, on which the main fuse 2, the main relay 3, the heating fuse 10, the heating relay 9, the pre-charge relay 8, and the pre-charge resistor 7 are separately and detachably mounted.

[0032] In this embodiment, the electrical components are assembled on the sheet metal bracket 1 , eliminating the need for housing packaging and additional connector integration, thereby reducing costs.

[0033] In this embodiment, the status of each electrical component is clear at a glance, and any incorrect or missing wiring harness connections can be quickly detected, making it convenient for maintenance personnel to confirm and troubleshoot the status of a particular electrical component.

[0034] In this embodiment, since each electrical component is individually and detachably mounted on the sheet metal bracket 1, when a certain electrical component needs to be replaced, the corresponding electrical component can be directly removed and replaced without replacing the entire BDU, which is convenient, fast and low in maintenance cost.

[0035] In this embodiment, only electrical components and brackets need to be purchased, eliminating the supplier packaging and integration process and shortening the delivery cycle.

[0036] Furthermore, as a preferred embodiment, the main fuse 2 and the main relay 3 are distributed laterally, and the pre-charging resistor 7, the pre-charging relay 8, the heating relay 9, and the heating fuse 10 are located on one side of the main fuse 2 and are distributed laterally in sequence.

[0037] In this embodiment, the electrical components are dispersed and do not need to be packaged and integrated. Moreover, the positions of the electrical components are compact and flexible, and the main fuse 2 can be installed at the same time, which better adapts to the reserved space in the package.

[0038] Furthermore, as a preferred embodiment, the main fuse 2 is electrically connected to a first copper bar 4 for connecting to the total positive of the PACK, the main relay 3 is electrically connected to a second copper bar 6 for connecting the discharge positive pole and the slow charging positive pole, and the main relay 3 and the main fuse 2 are electrically connected through a third copper bar 5. Specifically, the first copper bar 4, the second copper bar 6 and the third copper bar 5 form the main circuit connection copper bar. The position distribution of each electrical component can not only better adapt to the space in the battery pack, but also reduce the length of the main circuit connection copper bar as much as possible, thereby further saving costs.

[0039] Furthermore, as a preferred embodiment, the first copper bar 4 and the main fuse 2, the second copper bar 6 and the main relay 3, the third copper bar 5 and the main relay 3, and the third copper bar 5 and the main fuse 2 are all detachably connected by screws.

[0040] Furthermore, as a preferred embodiment, the main relay 3, the heating fuse 10, the heating relay 9, the pre-charge relay 8, and the pre-charge resistor 7 are all individually and detachably mounted on the sheet metal bracket 1 by screws.

[0041] Furthermore, as a preferred embodiment, the main fuse 2 and the pre-charging resistor 7, the pre-charging resistor 7 and the pre-charging relay 8, the pre-charging relay 8 and the main relay 3, the heating relay 9 and the main relay 3, and the heating relay 9 and the heating fuse 10 are all electrically connected through cables.

[0042] Furthermore, as a preferred embodiment, the sheet metal bracket 1 has a plurality of weight-reducing holes 11 to further save material costs and reduce weight.

[0043] Furthermore, as a preferred embodiment, the weight-reducing hole 11 is a rectangular hole.

[0044] Furthermore, as a preferred embodiment, the sheet metal bracket 1 is provided with a wire harness fixing tie 20, which reduces the number of wire harness fixing brackets in the bag.

[0045] Furthermore, as a preferred embodiment, connection holes are provided at one end of the first copper bar 4 away from the main fuse 2 and one end of the second copper bar 6 away from the main relay 3 .

[0046] The above description is only a preferred embodiment of the present invention and does not limit the implementation method and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A distributed BDU, comprising a main fuse, a main relay, a heating fuse, a heating relay, a pre-charge relay, and a pre-charge resistor, characterized in that: Also includes: A sheet metal bracket, on which the main fuse, the main relay, the heating fuse, the heating relay, the pre-charge relay, and the pre-charge resistor are separately and detachably mounted.

2. The distributed BDU according to claim 1, characterized in that: The main fuse and the main relay are distributed in the transverse direction. The pre-charging resistor, the pre-charging relay, the heating relay and the heating fuse are located on one side of the main fuse and are distributed in the transverse direction in sequence.

3. The distributed BDU according to claim 2, characterized in that: The main fuse is electrically connected to a first copper busbar for connecting to the total positive of the PACK, the main relay is electrically connected to a second copper busbar for connecting to the positive discharge electrode and the positive slow charge electrode, and the main relay and the main fuse are electrically connected via a third copper busbar.

4. The distributed BDU according to claim 3, characterized in that: The first copper bar and the main fuse, the second copper bar and the main relay, the third copper bar and the main relay, and the third copper bar and the main fuse are all detachably connected by screws.

5. The distributed BDU according to claim 1, characterized in that: The main relay, the heating fuse, the heating relay, the pre-charging relay, and the pre-charging resistor are all individually and detachably mounted on the sheet metal bracket by screws.

6. The distributed BDU according to claim 1, characterized in that: The main fuse and the pre-charging resistor, the pre-charging resistor and the pre-charging relay, the pre-charging relay and the main relay, the heating relay and the main relay, and the heating relay and the heating fuse are all electrically connected through cables.

7. The distributed BDU according to claim 1, characterized in that: The sheet metal bracket is provided with a plurality of weight-reducing holes.

8. The distributed BDU according to claim 7, characterized in that: The weight-reducing hole is a rectangular hole.

9. The distributed BDU according to claim 1, characterized in that: The sheet metal bracket is provided with a wire harness fixing strap.

10. The distributed BDU according to any one of claims 3-4, characterized in that: A connection hole is formed on one end of the first copper bar away from the main fuse and on one end of the second copper bar away from the main relay.

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