Wireless beam integrated quick-plug split BDU (Business Data Unit)

Abstract

The utility model discloses a wireless bunching integrated fast plug type split BDU, which comprises a positive electrode BDU and a negative electrode BDU, the positive electrode BDU and the negative electrode BDU respectively comprise a shell, a PCB, a sampling copper bar, a plurality of spring copper bars, a copper bar module, a main relay and a plug-in, the PCB is arranged in the shell, the spring copper bars and the plug-in are arranged on the PCB, the main relay is arranged in the shell, and the sampling copper bar, the spring copper bars, the copper bar module, the main relay and the plug-in are arranged in the shell. The main relay is provided with a copper bar module, the copper bar module is in plug-in connection with the spring copper bar through the sampling copper bar, and the plug-in extends out of the shell. The BDU is arranged to be in a split type, a single BDU is only designed to be a positive or negative loop, an internal loop is connected through a sampling copper bar, an elastic piece copper bar and a copper bar module, sampling and control are integrated on a PCB, external output is achieved through a single plug-in, the interior of the whole BDU is not provided with a wire harness, rapid installation or disassembly is convenient to achieve, and due to the fact that the interior of the whole BDU is not provided with the wire harness, the BDU is convenient to install and disassemble. And the phenomena of disorder and winding of the wire harnesses can be avoided.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a wireless beam-integrated quick-connect split BDU. Background Technology

[0002] In new energy power batteries, BDU (Battery Disconnect Unit) is a very important component. BDU is the high-voltage, high-current distribution unit of the battery system. It is connected to the high-voltage load of the vehicle and the fast charging harness through a high-voltage electrical interface. It includes a housing, pre-charge relay, main positive relay, main negative relay, fast charging relay and other components. The overall positive and negative circuits of BDU are realized inside the housing, and the circuits are connected by copper busbars. BDU also integrates BMU (Battery Management Unit). Internal sampling and control are connected to BMU through a harness. The BMU is connected to the outside through a harness that extends out from the side opening.

[0003] In existing technologies, both positive and negative circuits are implemented inside the housing, and the sampling and control inside the BDU are connected to the BMU using wiring harnesses. This results in a large number of wiring harnesses inside the housing, which can easily lead to messy and tangled wiring harnesses, making installation and use inconvenient. Utility Model Content

[0004] The purpose of this invention is to provide a wireless beam-free integrated quick-connect split BDU to solve the above-mentioned technical problems.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A wireless integrated quick-connect split BDU includes a positive BDU and a negative BDU. Both the positive and negative BDUs include: a housing, a PCB board, a sampling copper busbar, a spring-loaded copper busbar, a copper busbar module, a main relay, and a plug-in. The PCB board is housed within the housing, and several spring-loaded copper busbars and the plug-in are mounted on the PCB board. The main relay is housed within the housing, and the copper busbar module is mounted on the main relay. The copper busbar module is connected to the spring-loaded copper busbars via the sampling copper busbars. The plug-in extends out of the housing.

[0007] Preferably, the housing includes a base, a top cover, and a bottom protective plate. The top cover is provided at the upper end of the base, and the bottom protective plate is provided at the lower end of the base. The PCB board, the sampling copper busbar, the spring copper busbar, the copper busbar module, and the main relay are all disposed inside the base, and the plug-in extends out of the base.

[0008] Preferably, each of the spring copper busbars includes a connecting piece, a positioning piece, and a snap-fit ​​piece. The lower end of the connecting piece is provided with a plurality of positioning pieces. The connecting piece is provided with an installation hole. A plurality of snap-fit ​​pieces are provided on both sides of the installation hole. Each snap-fit ​​piece is inclined downward.

[0009] As a further preferred embodiment, the snap-fit ​​tabs are inclined from top to bottom toward the center of the mounting hole, the positioning tabs are soldered to the PCB board, the PCB board is provided with a plurality of positioning holes and through holes, the positioning tabs are disposed in the positioning holes, and a plurality of snap-fit ​​tabs extend into the through holes.

[0010] Preferably, the cover also includes a warning label and a product label, and the cover is provided with the warning label and the product label.

[0011] Preferably, a first buckle is provided on the side wall of the bottom cover, and a card interface is provided on the side wall of the top cover, with the first buckle cooperating with the card interface.

[0012] Preferably, a second latch is provided on the side wall of the main relay, and a slot that cooperates with the second latch is provided on the inner wall of the base.

[0013] Preferably, a fuse is provided in the copper busbar module of the positive electrode BDU, and a shunt is provided in the copper busbar module of the negative electrode BDU.

[0014] Preferably, the positive BDU further includes a pre-charge resistor and a relay, which are respectively connected to the PCB board.

[0015] As a further preferred embodiment, the copper busbar module is electrically connected to the fuse or the shunt.

[0016] The above technical solution has the following advantages or beneficial effects:

[0017] In this invention, the BDU is designed as a split type, with each BDU having only a positive or negative circuit. The internal circuit is connected by sampling copper busbars, spring copper busbars, and copper busbar modules. Sampling and control are integrated on the PCB board and output to the outside through a single plug-in. The entire BDU is wireless, which facilitates quick installation or disassembly. Furthermore, the wireless design of the entire BDU avoids the occurrence of messy or tangled wires. Attached Figure Description

[0018] Figure 1 This is an explosion diagram of the positive electrode BDU in this utility model;

[0019] Figure 2 This is an exploded schematic diagram of the negative electrode BDU in this utility model;

[0020] Figure 3 yes Figure 1 Enlarged view of point A in the middle;

[0021] Figure 4 This is a perspective view of the spring-loaded copper busbar in this utility model.

[0022] In the diagram: 1. Positive BDU; 2. Negative BDU; 3. Housing; 4. PCB board; 5. Sampling copper busbar; 6. Spring copper busbar; 7. Copper busbar module; 8. Main relay; 9. Plug-in; 10. Base; 11. Top cover; 12. Bottom guard plate; 13. Connecting piece; 14. Positioning piece; 15. Snap-fit ​​piece; 16. Mounting hole; 17. Positioning hole; 18. Through hole; 19. Warning label; 20. Product label; 21. First snap-fit; 22. Snap-fit ​​interface; 23. Second snap-fit; 24. Fuse; 25. Shunt; 26. Pre-charge resistor; 27. Relay. Detailed Implementation

[0023] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated 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 for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Figure 1 This is an explosion diagram of the positive electrode BDU in this utility model; Figure 2 This is an exploded schematic diagram of the negative electrode BDU in this utility model; Figure 3 yes Figure 1 Enlarged view of point A in the middle; Figure 4 This is a perspective view of the spring-loaded copper busbar in this utility model. Please refer to [link / reference]. Figures 1 to 4 The diagram illustrates a preferred embodiment of a wireless integrated quick-connect split BDU, comprising a positive BDU1 and a negative BDU2. Both the positive and negative BDU1 include: a housing 3, a PCB board 4, a sampling copper busbar 5, a spring-loaded copper busbar 6, a copper busbar module 7, a main relay 8, and a plug-in 9. The PCB board 4 is housed within the housing 3, and several spring-loaded copper busbars 6 and plug-in 9 are mounted on the PCB board 4. The main relay 8 is also housed within the housing 3, and the copper busbar module 7 is mounted on the main relay 8. The copper busbar module 7 connects to the spring-loaded copper busbars 6 via the sampling copper busbars 5. The plug-in 9 extends out of the housing 3. In this embodiment, both the positive and negative BDU1 are installed inside the battery pack, and the overall structure is made of plastic. The internal PCB board 4, sampling copper busbar 5, spring-loaded copper busbar 6, copper busbar module 7, main relay 8, and plug-in 9 are all mounted on the plastic component.

[0027] The BDU is divided into positive BDU1 and negative BDU2. Each BDU is designed with only a positive or negative circuit, and the internal circuits are connected using copper busbars. Each BDU outputs externally through a single plug-in 9, eliminating the need for internal wiring harnesses and avoiding the messy and inconvenient installation issues associated with traditional BDUs. In this embodiment, the spring-loaded copper busbar 6 is soldered onto the PCB board 4, and the sampling copper busbar 5 is directly plugged into the spring-loaded copper busbar 6. In the prior art, the sampling copper busbar 5 is soldered to the PCB board 4. This connection method requires a separate workstation on the production line to solder it onto the PCB board 4, which takes a long time and may require manual resoldering at subsequent workstations, hindering production line automation. In this embodiment, the spring-loaded copper busbar 6 is pre-soldered onto the PCB board 4, and the sampling copper busbar 5 is directly plugged into the spring-loaded copper busbar 6, which significantly reduces workstation time and enables production line automation.

[0028] In this embodiment, the plug-in 9 in the positive electrode BDU1 can be an 8-pin plug-in, and the plug-in 9 in the negative electrode BDU2 can be a 4-pin plug-in. The type of plug-in 9 is not limited to these; it can be selected as needed.

[0029] Furthermore, as a preferred embodiment, the outer casing 3 includes a base 10, a top cover 11, and a bottom protective plate 12. The upper end of the base 10 is provided with a top cover, and the lower end of the base 10 is provided with a bottom protective plate 12. The PCB board 4, sampling copper busbar 5, spring copper busbar 6, copper busbar module 7, and main relay 8 are all disposed within the base 10, and the plug-in 9 extends out of the base 10. In this embodiment, see... Figure 1As shown, the upper and lower ends of the base 10 are sealed by the upper cover 11 and the bottom protective plate 12, and the upper cover 11 and the bottom protective plate 12 are connected by a snap-fit, which facilitates the disassembly or assembly of the entire housing 3, as well as the disassembly or installation of internal components. The base 10 is provided with holes for mounting the PCB board 4, sampling copper busbar 5, spring copper busbar 6, copper busbar module 7 and main relay 8.

[0030] The PCB board 4 is connected to the base 10 by bolts, while the spring-loaded copper busbar 6 is soldered to the PCB board 4. The copper busbar module 7 includes several copper busbars, as detailed below. Figure 1 As shown, the copper busbar and the main relay 8 are connected by bolts to achieve electrical connection between them.

[0031] The copper busbars in sampling copper busbar 5 and copper busbar module 7 can be connected by bolts or by direct welding.

[0032] Furthermore, as a preferred embodiment, each spring copper busbar 6 includes a connecting piece 13, a positioning piece 14, and a snap-fit ​​piece 15. The lower end of the connecting piece 13 is provided with several positioning pieces 14. The connecting piece 13 has mounting holes 16, and several snap-fit ​​pieces 15 are arranged on both sides of the mounting holes 16, each snap-fit ​​piece 15 being inclined downwards. See also... Figure 4 As shown, the connecting piece 13, positioning piece 14, and snap-fit ​​piece 15 can be integrally formed or directly welded together. Four positioning pieces 14 are provided, located at the four included corners of the connecting piece 13, while three snap-fit ​​pieces 15 are provided, distributed on the inner walls of both sides of the mounting hole 16. The snap-fit ​​pieces 15 are inclined, and the lower end of the sampling copper busbar 5 is inserted between the snap-fit ​​pieces 15, thereby snapping and fixing the sampling copper busbar 5.

[0033] Furthermore, as a preferred embodiment, the snap-fit ​​tabs 15 are inclined from top to bottom towards the center of the mounting hole 16. The positioning tabs 14 are soldered to the PCB board 4. The PCB board 4 has several positioning holes 17 and through holes 18. The positioning tabs 14 are disposed in the positioning holes 17, and the snap-fit ​​tabs 15 extend into the through holes 18. See also Figure 3 As shown, after the positioning piece 14 is inserted into the positioning hole 17, it is fixed by welding. At this time, the snap-fit ​​piece 15 extends into the through hole 18, and the lower end of the sampling copper bus 5 is inserted between the two snap-fit ​​pieces 15 and extends into the through hole 18.

[0034] Furthermore, as a preferred embodiment, it also includes a warning label 19 and a product label 20, with the upper cover 11 provided with the warning label 19 and the product label 20. The warning label 19 and the product label 20 can be fixed to the upper surface of the upper cover 11 by adhesive.

[0035] Furthermore, as a preferred embodiment, a first buckle 21 is provided on the side wall of the bottom cover 12, and a card interface 22 is provided on the side wall of the top cover 11, with the first buckle 21 cooperating with the card interface 22. See also Figure 1 As shown, a downwardly extending protruding edge is provided on the outer peripheral wall of the upper cover 11 plate, and a snap-fit ​​interface 22 is provided on the protruding edge. The protruding edge extends to the lower side of the base 10, so that the first snap-fit ​​21 can enter into the snap-fit ​​interface 22 to realize the snap-fit ​​between the upper cover 11 and the bottom protective plate 12, which facilitates the quick installation or removal of the upper cover 11 and the bottom protective plate 12.

[0036] Furthermore, as a preferred embodiment, a second latch 23 is provided on the side wall of the main relay 8, and a latching groove that mates with the second latch 23 is provided on the inner wall of the base 10. The main relay 8 and the base 10 are connected by a latch, which facilitates the quick installation or removal of the main relay 8.

[0037] Furthermore, as a preferred embodiment, a fuse 24 is provided in the copper busbar module 7 of the positive electrode BDU1, and a shunt 25 is provided in the copper busbar module 7 of the negative electrode BDU2. See also... Figure 1 and Figure 2 As shown, the copper busbar module 7 is electrically connected to the fuse 24 or the shunt 25. Specifically, the copper busbar in the copper busbar module 7 is fixed to the fuse 24 or the shunt 25 by bolts to achieve the electrical connection between the two.

[0038] Furthermore, as a preferred embodiment, the positive electrode BDU1 also includes a pre-charge resistor 26 and a relay 27, which are respectively connected to the PCB board 4. See [link to documentation]. Figure 1 As shown, the pre-charge resistor 26 and the relay 27 are located at the upper end of the PCB board 4 and are electrically connected to the PCB board 4, while the negative terminal BDU2 does not have the pre-charge resistor 26 and the relay 27.

[0039] In use, first install the PCB board 4 on the lower inner wall of the base 10, and connect and fix the PCB board 4 to the base 10 with bolts. At this time, the plug-in 9, relay 27 and pre-charge resistor 26 on the PCB board 4 will be inserted into the corresponding holes on the base 10. The plug-in 9 can directly extend out of the base 10 for external output. Then install the sampling copper busbar 5, so that the lower end of the sampling copper busbar 5 passes through the base 10 and is inserted into the spring copper busbar 6 to achieve the connection and fixation between the two. Then install the main relay 8 and the copper busbar module 7, and connect the copper busbar module 7 to the main relay 8 with bolts. Connect and fix the copper busbar module 7 to the spring copper busbar 6. Then install the top cover 11, and snap the first buckle 21 on the bottom guard plate 12 into the card interface 22 on the top cover 11 to achieve the connection between the top cover 11 and the bottom guard plate 12, thus completing the assembly.

[0040] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A wireless, integrated, quick-connect split BDU, characterized in that, The device includes a positive BDU and a negative BDU. Each of the positive and negative BDUs includes: a housing, a PCB board, a sampling copper busbar, a spring-loaded copper busbar, a copper busbar module, a main relay, and a plug-in. The PCB board is disposed inside the housing, and a plurality of spring-loaded copper busbars and the plug-in are disposed on the PCB board. The main relay is disposed inside the housing, and the copper busbar module is disposed on the main relay. The copper busbar module is connected to the spring-loaded copper busbars through the sampling copper busbars, and the plug-in extends out of the housing.

2. The wireless integrated quick-connect split BDU as described in claim 1, characterized in that, The housing includes a base, a top cover, and a bottom protective plate. The top cover is provided at the upper end of the base, and the bottom protective plate is provided at the lower end of the base. The PCB board, the sampling copper busbar, the spring copper busbar, the copper busbar module, and the main relay are all disposed inside the base, and the plug-in extends out of the base.

3. The wireless integrated quick-connect split BDU as described in claim 1, characterized in that, Each of the aforementioned spring copper busbars includes a connecting piece, a positioning piece, and a snap-fit ​​piece. The lower end of the connecting piece is provided with several positioning pieces. The connecting piece is provided with an installation hole. Several snap-fit ​​pieces are provided on both sides of the installation hole. Each snap-fit ​​piece is inclined downwards.

4. The wireless integrated quick-connect split BDU as described in claim 3, characterized in that, The snap-fit ​​pieces are inclined from top to bottom toward the center of the mounting hole. The positioning pieces are soldered to the PCB board. The PCB board is provided with a plurality of positioning holes and through holes. The positioning pieces are located in the positioning holes, and a plurality of snap-fit ​​pieces extend into the through holes.

5. The wireless integrated quick-connect split BDU as described in claim 2, characterized in that, It also includes warning labels and product labels, and the top cover is provided with the warning labels and product labels.

6. The wireless integrated quick-connect split BDU as described in claim 2, characterized in that, The bottom protective plate has a first buckle on its side wall, and the top cover has a card interface on its side wall. The first buckle cooperates with the card interface.

7. The wireless integrated quick-connect split BDU as described in claim 2, characterized in that, The main relay has a second buckle on its side wall, and the base has a slot on its inner wall that cooperates with the second buckle.

8. The wireless integrated quick-connect split BDU as described in claim 1, characterized in that, A fuse is installed in the copper busbar module of the positive electrode BDU, and a shunt is installed in the copper busbar module of the negative electrode BDU.

9. The wireless integrated quick-connect split BDU as described in claim 1, characterized in that, The positive BDU also includes a pre-charge resistor and a relay, which are respectively connected to the PCB board.

10. The wireless integrated quick-connect split BDU as described in claim 8, characterized in that, The copper busbar module is electrically connected to the fuse or the shunt.

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