BDU controller

Abstract

The BDU controller comprises a bottom shell, a main positive loop, a main negative loop and a pre-charging loop, the main positive loop is arranged in the bottom shell, a protector and a main positive relay which are electrically connected in sequence are arranged on the main positive loop, the protector is erected in the middle of the bottom shell, and the main positive relay is arranged on one side of the protector; the main negative loop is arranged in the bottom shell, a diverter and a main negative relay which are electrically connected in sequence are arranged on the main negative loop, the diverter is located at the edge of the bottom shell on the side, away from the main positive relay, of the protector and is parallel to the protector, and the main negative relay is located between the protector and the diverter; the pre-charging loop is arranged in the bottom shell, located between the protector and the bottom wall of the bottom shell and used for protecting the main positive loop, and through reasonable layout of the main positive loop, the main negative loop, the pre-charging loop and the quick charging loop in the bottom shell, the internal space of the shell can be more compact, and the space utilization rate is effectively increased.

Description

Technical Field

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

[0002] The BDU controller is the battery pack circuit breaker unit, which is specially designed for the inside of the battery pack and is also a type of high-voltage distribution box. It contains system main circuit contactors, pre-charge relays, current sensors and other components, and is responsible for current control and protection of the battery pack.

[0003] A BDU unit and battery pack with publication number CN220553578U, wherein the BDU unit comprises: a shell, comprising a lower shell, the lower shell is used to connect with a liquid cooling plate, the peripheral wall of the lower shell surrounds a receiving cavity, and the surrounding of the receiving cavity is separated from the outside world by the peripheral wall; an electrical component is invertedly installed in the receiving cavity; a bus is arranged on the lower shell and is used to be electrically connected to the electrical component.

[0004] At present, the distribution box of the battery system is mostly composed of an upper cover, a lower cover, a copper busbar, and corresponding functional electrical components, and the various components are integrated into an overall shell. However, most of the existing BDU controllers have the problems of large occupied area, high cost, and low space utilization. Therefore, a BDU controller needs to be proposed. Utility Model Content

[0005] In view of this, the utility model proposes a BDU controller, which occupies a small area, has a low cost, a high space utilization rate, and is easy to use.

[0006] The technical solution of the utility model is implemented as follows: The utility model provides a BDU controller, including:

[0007] Bottom shell;

[0008] The main positive circuit is arranged in the bottom shell and connected to the positive electrode of the battery module on the vehicle. The main positive circuit is provided with a fuse and a main positive relay which are electrically connected in sequence. The fuse is mounted in the middle of the bottom shell, and the main positive relay is arranged on one side of the fuse.

[0009] A main negative circuit is arranged in the bottom shell and connected to the negative electrode of the battery module on the vehicle. The main negative circuit is provided with a shunt and a main negative relay which are electrically connected in sequence. The shunt is located at the edge of the bottom shell on the side of the fuse away from the main positive relay and is arranged in parallel with the fuse. The main negative relay is located between the fuse and the shunt;

[0010] The pre-charging circuit is arranged in the bottom shell and is located between the fuse and the bottom wall of the bottom shell. The two ends of the pre-charging circuit are electrically connected to the input end of the fuse and the output end of the main positive relay respectively, so as to protect the main positive circuit.

[0011] On the basis of the above technical solution, preferably, the main positive circuit further includes a battery connection positive terminal row and a main positive output terminal row, wherein:

[0012] The battery positive terminal row is arranged at one side edge of the bottom shell, and one end of the battery positive terminal row is connected to the positive electrode of the battery module on the vehicle, and the other end is electrically connected to the input end of the fuse, and the output end of the fuse is electrically connected to one end of the contact of the main positive relay;

[0013] The main positive output terminal row is arranged at the edge of the bottom shell and is on the same side as the battery connection positive terminal row and is arranged adjacent to each other. One end of the main positive output terminal row is electrically connected to the other end of the contact of the main positive relay.

[0014] On the basis of the above technical solution, preferably, the main negative circuit further includes a battery connection negative terminal row and a main negative output terminal row, wherein:

[0015] The battery connection negative terminal row is arranged at the edge of the bottom shell, and is on the same side as the battery connection positive terminal row, and is arranged on the side of the battery connection positive terminal row away from the main positive output terminal row. One end of the battery connection negative terminal row is connected to the negative electrode of the battery module on the vehicle, and the other end is electrically connected to the input end of the shunt. The output end of the shunt is electrically connected to one end of the contact of the main negative relay.

[0016] The main negative output terminal row is arranged at the edge of the bottom shell, and is on the same side as the battery connection positive terminal row, and is arranged on the side of the main positive output terminal row away from the battery connection positive terminal row. The main negative output terminal row is electrically connected to the other end of the contact of the main negative relay.

[0017] On the basis of the above technical solution, preferably, the pre-charging circuit includes a pre-charging relay and a pre-charging resistor, wherein:

[0018] The pre-filling relay is arranged in the bottom shell and is located between the fuse and the main positive relay, and one end of the contact of the pre-filling relay is electrically connected to the output end of the fuse;

[0019] The pre-charging resistor is arranged in the bottom shell, and is located directly below the fuse and arranged in parallel with the fuse. One end of the pre-charging resistor is electrically connected to the other end of the contact of the pre-charging relay, and the other end is electrically connected to the main positive output terminal.

[0020] On the basis of the above technical solution, preferably, it also includes a fast charging positive circuit, the fast charging positive circuit includes a fast charging relay and a fast charging positive connection terminal row, wherein,

[0021] The fast charging relay is arranged in the bottom shell and is located on a side of the pre-charging relay away from the pre-charging resistor and is in the same straight line as the pre-charging relay. One end of the contact of the fast charging relay is electrically connected to the output end of the fuse.

[0022] The fast charging positive connection terminal row is arranged at the edge of the bottom shell, and is on the same side as the battery connection positive terminal row, and is arranged on the side of the main negative output terminal row away from the main positive output terminal row. The fast charging positive connection terminal row is electrically connected to the other end of the contact of the fast charging relay.

[0023] On the basis of the above technical scheme, preferably, a plurality of mounting parts are provided on the bottom shell, and an annular opening is opened on the side of the mounting part away from the bottom shell, and a first buffer is embedded in each annular opening, the first buffer is arranged in a tubular shape, and both sides of the first buffer respectively pass through the annular opening and extend outward, a fixing part is inserted into the first buffer part, and the bottom shell is connected and fixed to the battery pack shell by external bolts passing through the fixing part, and a detachable cover body is also provided on the bottom shell, and a plurality of second buffer parts are provided on the side of the cover body away from the bottom shell, and the surfaces of the second buffer parts are in contact with the inner wall of the battery pack shell.

[0024] On the basis of the above technical solution, preferably, the first buffer member includes a middle cylinder segment and two annular segments, wherein:

[0025] The middle cylinder section is embedded in the annular opening, and the outer wall of the middle cylinder section abuts against the inner wall of the annular opening;

[0026] The two annular segments are respectively fixed on the two side ends of the middle cylinder segment, and the two annular segments and the axis of the middle cylinder segment are on the same straight line, the diameter of the annular segment is larger than the diameter of the middle cylinder segment, and the opposite sides of the two annular segments are respectively in contact with the opposite side of the mounting portion.

[0027] On the basis of the above technical solution, preferably, the fixing member includes an inserting section and a connecting section, wherein:

[0028] The middle parts of the plug-in section and the connecting section are both hollow, the axes of the plug-in section and the connecting section are on the same straight line, and the diameter of the connecting section is larger than the diameter of the plug-in section;

[0029] One end of the plug-in section passes through the circular ring section and extends into the middle tube section, and the outer side wall of the plug-in section abuts against the inner side walls of the circular ring section and the middle tube section;

[0030] The connecting section is fixed to one end of the plug-in section, and a side of the connecting section close to the first buffer is in contact with the surface of the annular section.

[0031] On the basis of the above technical solution, preferably, the plurality of second buffer members are disposed at respective corners of the cover body, and surfaces of one side of the plurality of second buffer members away from the cover body are on the same plane.

[0032] On the basis of the above technical solution, preferably, a plurality of counter-fasteners are arranged on the outer side of the cover body, and a plurality of protrusions and guide members are arranged on the outer side of the bottom shell, the positions of the counter-fasteners correspond one-to-one to the positions of the protrusions, and the protrusions are snap-fitted into the counter-fasteners, the guide members are arranged corresponding to the positions of the protrusions, and the inner side walls of the guide members are in contact with the outer side walls of the counter-fasteners.

[0033] The BDU controller of the utility model has the following beneficial effects compared with the prior art:

[0034] (1) The reasonable layout of the main positive circuit, the main negative circuit, the pre-charging circuit and the fast-charging circuit in the bottom shell can make the internal space of the shell more compact, effectively improving the space utilization rate;

[0035] (2) The first buffer member is provided to flexibly connect the bottom shell to the battery pack shell, effectively reducing the vibration and noise transmission between the BDU controller and the bottom of the battery pack. The second buffer member is provided to fit the top wall of the battery pack shell, effectively reducing the vibration transmission between the BDU controller and the top of the battery pack. At the same time, the second buffer member can play an insulating and protective role, avoiding the wear caused by the contact between the BDU controller cover surface and the battery pack surface, thereby improving the safety performance of the entire battery system.

[0036] (3) The first buffer component is embedded in the annular opening, and the two opposite sides of the circular segments of the first buffer component are respectively abutted against the side opposite to the mounting portion, so that the first buffer component and the annular opening are detachable and are not easy to fall off from the annular opening. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 This is a first-perspective stereoscopic view of the internal structure of the bottom shell of the BDU controller of the present utility model;

[0039] Figure 2 This is a second perspective stereogram of the internal structure of the bottom shell of the BDU controller of the present utility model;

[0040] Figure 3 It is a three-dimensional diagram of the BDU controller of the utility model;

[0041] Figure 4 The BDU controller of the utility model Figure 3A partial enlarged schematic diagram in the middle;

[0042] Figure 5 It is a front view of the BDU controller of the utility model;

[0043] Figure 6 The BDU controller of the utility model Figure 5 Pavement diagram at middle BB. DETAILED DESCRIPTION

[0044] The following will be combined with the implementation of the utility model to clearly and completely describe the technical solutions in the implementation of the utility model. Obviously, the described implementation is only a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0045] like Figure 1-6 As shown, a BDU controller of the utility model includes a bottom shell 1, a main positive circuit 2, a main negative circuit 3 and a pre-charging circuit 4.

[0046] Among them, the main positive circuit 2 is arranged in the bottom shell 1 and is connected to the positive pole of the battery module on the vehicle. The main positive circuit 2 is provided with a fuse 21 and a main positive relay 22 which are electrically connected in sequence. The fuse 21 is mounted in the middle of the bottom shell 1, and the main positive relay 22 is arranged on one side of the fuse 21; the main negative circuit 3 is arranged in the bottom shell 1 and is connected to the negative pole of the battery module on the vehicle. The main negative circuit 3 is provided with a shunt 31 and a main negative relay 32 which are electrically connected in sequence. The shunt 31 is located at the edge of the bottom shell 1 on the side of the fuse 21 away from the main positive relay 22, and is arranged parallel to the fuse 21, and the main negative relay 32 is located between the fuse 21 and the shunt 31; the pre-charging circuit 4 is arranged in the bottom shell 1 and is located between the fuse 21 and the bottom wall of the bottom shell 1. The two ends of the pre-charging circuit 4 are respectively electrically connected to the input end of the fuse 21 and the output end of the main positive relay 22, for protecting the main positive circuit.

[0047] It should be noted that the controller mainly includes a base 1, a main positive circuit 2, a main negative circuit 3 and a pre-charging circuit 4. The main positive circuit 2 and the main negative circuit 3 are the main channels responsible for power transmission in the controller. The main positive circuit 2 is connected to the positive pole of the battery module, and the transmission and control of power are realized through the fuse 21 and the main positive relay 22. Similarly, the main negative circuit 3 is connected to the negative pole of the battery module, and the reflux control of power is completed through the shunt 21 and the main negative relay 22. The pre-charging circuit 4 protects the main positive circuit 2. During the startup or charging process, the pre-charging circuit 4 can pre-charge the capacitor to reduce the current shock, thereby protecting the main positive circuit 2 and related components from damage.

[0048] In addition, the fuse 21 is mounted in the middle of the bottom shell 1, and the main positive relay 22 is arranged on one side of the fuse 21; the shunt 31 is located at the edge of the bottom shell 1 on the side of the fuse 21 away from the main positive relay 22, and is arranged parallel to the fuse 21, and the main negative relay 32 is located between the fuse 21 and the shunt 31; the pre-charging circuit 4 is located between the fuse 21 and the bottom wall of the bottom shell 1, and the positions of the components in the bottom shell 1 are reasonably arranged, making full use of the space, so that the entire controller has a compact structure and is easy to install and maintain.

[0049] As a preferred embodiment, the main positive circuit 2 in this embodiment also includes a battery connection positive terminal row 23 and a main positive output terminal row 24, wherein the battery connection positive terminal row 23 is arranged at one side edge of the bottom shell 1, and one end of the battery connection positive terminal row 23 is connected to the positive pole of the battery module on the vehicle, and the other end is electrically connected to the input end of the fuse 21, and the output end of the fuse 21 is electrically connected to one end of the contact of the main positive relay 22; the main positive output terminal row 24 is arranged at the edge of the bottom shell 1, and is on the same side as the battery connection positive terminal row 23, and is arranged adjacent to each other, and one end of the main positive output terminal row 24 is electrically connected to the other end of the contact of the main positive relay 22.

[0050] It should be noted that the battery connection positive terminal row 23 is arranged at one side edge of the bottom shell 1, which provides a convenient interface for accessing the positive power of the battery, and is also convenient for connecting with other battery components or external power sources. In addition, the main positive output terminal row 24 and the battery connection positive terminal row 23 are on the same side and are arranged adjacent to each other. Such a layout not only facilitates the transmission of electric energy, but also makes the structure of the entire controller more compact and easy to install and maintain.

[0051] As a preferred embodiment, the main negative circuit 3 in this embodiment also includes a battery connection negative terminal row 33 and a main negative output terminal row 34, wherein the battery connection negative terminal row 33 is arranged at the edge of the bottom shell 1, and is on the same side as the battery connection positive terminal row 23, and is located on the side of the battery connection positive terminal row 23 away from the main positive output terminal row 24, one end of the battery connection negative terminal row 33 is connected to the negative pole of the battery module on the vehicle, and the other end is electrically connected to the input end of the shunt 31, and the output end of the shunt 31 is electrically connected to one end of the contact of the main negative relay 32; the main negative output terminal row 34 is arranged at the edge of the bottom shell 1, and is on the same side as the battery connection positive terminal row 23, and is located on the side of the main positive output terminal row 24 away from the battery connection positive terminal row 23, and the main negative output terminal row 34 is electrically connected to the other end of the contact of the main negative relay 32.

[0052] It should be noted that the battery connection negative terminal row 33 and the battery connection positive terminal row 23 are arranged on the same side of the bottom shell, and the main negative output terminal row 34 and the main positive output terminal row 24 also maintain consistency in relative position, which is convenient for circuit connection. At the same time, the compact layout also reduces the size of the controller, making it easier to integrate into the vehicle. The introduction of the shunt 31 enables the main negative circuit 3 to have current distribution and measurement functions; this helps to monitor and manage the current in the circuit to ensure the stable operation of the circuit; at the same time, the shunt 31 can also limit the current size when necessary to protect the circuit from damage caused by excessive current.

[0053] As a preferred embodiment, the pre-charging circuit 4 in this embodiment includes a pre-charging relay 41 and a pre-charging resistor 42, wherein the pre-charging relay 41 is arranged in the bottom shell 1 and is located between the fuse 21 and the main positive relay 22, and one end of the contact of the pre-charging relay 41 is electrically connected to the output end of the fuse 21; the pre-charging resistor 42 is arranged in the bottom shell 1 and is located directly below the fuse 21 and is arranged parallel to the fuse 21, one end of the pre-charging resistor 42 is electrically connected to the other end of the contact of the pre-charging relay 41, and the other end is electrically connected to the main positive output terminal 24.

[0054] It should be noted that the pre-charging function of the main positive circuit is realized through the combination of the pre-charging relay 41 and the pre-charging resistor 42, thereby protecting the components in the circuit from large current shocks. When the battery module just starts to supply power or charge, the current may be very large. If the main positive circuit 2 is directly connected, it may cause shocks to the components in the circuit or even damage them. The design of the pre-charging circuit 4 allows the main positive circuit 2 to be pre-charged through the pre-charging resistor 42 in the initial stage, limiting the current size, thereby protecting the components in the main positive circuit 2. The setting of the pre-charging relay 41 allows the pre-charging process to be flexibly controlled. When pre-charging is required, the current can be pre-charged through the pre-charging resistor 42 by closing the pre-charging relay 41; when pre-charging is completed or no pre-charging is required, the pre-charging relay 41 is disconnected, and the current is directly transmitted through the main positive circuit 2.

[0055] As a preferred embodiment, the present embodiment also includes a fast charging positive circuit 5, and the fast charging positive circuit 5 includes a fast charging relay 51 and a fast charging positive connection terminal row 52, ​​wherein the fast charging relay 51 is arranged in the bottom shell 1, and is located on the side of the pre-charging relay 41 away from the pre-charging resistor 42, and is on the same straight line as the pre-charging relay 41, and one end of the contact of the fast charging relay 51 is electrically connected to the output end of the fuse 21; the fast charging positive connection terminal row 52 is arranged at the edge of the bottom shell 1, and is on the same side as the battery connection positive terminal row 23, and is located on the side of the main negative output terminal row 34 away from the main positive output terminal row 24, and the fast charging positive connection terminal row 52 is electrically connected to the other end of the contact of the fast charging relay 51.

[0056] It should be noted that the fast charging positive circuit 5 realizes efficient connection with the fast charging device through the combination of the fast charging relay 51 and the fast charging positive connection terminal row 52. When the vehicle needs fast charging, the fast charging relay 51 is activated, and the current quickly flows into the vehicle battery module through the fast charging positive connection terminal row 52, ​​thereby realizing fast charging. The fast charging relay 51 is arranged in the bottom shell 1, and is located on the side of the pre-charging relay 41 away from the pre-charging resistor 42, and is in the same straight line as the pre-charging relay 41. This layout makes the structure of the entire controller more compact and reduces space occupancy. At the same time, the fast charging positive connection terminal row 52 is on the same side as the battery connection positive terminal row 23, and is located on the side of the main negative output terminal row 34 away from the main positive output terminal row 24. Such a layout facilitates charging connection and makes the overall structure more tidy.

[0057] The bottom shell 1 in this embodiment is provided with a plurality of mounting portions 10, and a circular opening 100 is opened on a side of the mounting portion 10 away from the bottom shell 1, and a first buffer member 6 is embedded in each of the circular openings 100. The first buffer member 6 is arranged in a tubular shape, and both sides of the first buffer member 6 respectively penetrate the circular opening 100 and extend outward, and a fixing member 7 is inserted into the first buffer member 6. The bottom shell 1 is connected and fixed to the battery pack shell by external bolts passing through the fixing member 7. A detachable cover body 8 is also provided on the bottom shell 1, and a plurality of second buffer members 9 are provided on a side of the cover body 8 away from the bottom shell 1, and the surfaces of the second buffer members 9 are all in contact with the inner wall of the battery pack shell.

[0058] It should be noted that the first buffer 6 is a rubber sleeve. Since the rubber sleeve has the ability to deform, when the first buffer 6 is embedded and clamped in the annular opening 100, the first buffer 6 is deformed and reset to abut against the annular opening 100 and is not easy to loosen. The fixing member 7 is inserted into the first buffer 6 from above. Since the rubber sleeve also has a large friction force, when the fixing member 7 is inserted into the matching first buffer 6, it can be relatively fixed and not easy to loosen. The fixing member 7 is a steel sleeve. When fixing it with the battery pack, the bolts are passed through the fixing member 7 and connected with the inner wall of the battery pack shell. The bottom shell 1 is fixed so that it is flexibly connected to the battery pack shell, which effectively reduces the vibration and noise transmission between the BDU controller and the bottom of the battery pack. The second buffer 9 is a rubber insulating pad. The second buffer 9 is arranged to fit with the inner top wall of the battery pack shell, which can effectively reduce the vibration transmission between the BDU controller and the top of the battery pack and enhance the installation stability of the BDU. At the same time, the second buffer 9 can play an insulating and protective effect, which can avoid the wear caused by the contact between the surface of the BDU controller cover 8 and the surface of the battery pack, thereby improving the safety performance of the entire battery system.

[0059] As a preferred embodiment, the first buffer member 6 in this embodiment includes a middle cylinder section 61 and two circular ring sections 62, wherein the middle cylinder section 61 is embedded in the annular opening 100, and the outer wall of the middle cylinder section 61 abuts against the inner wall of the annular opening 100; the two circular ring sections 62 are respectively fixed to the two side ends of the middle cylinder section 61, and the two circular ring sections 62 and the axis of the middle cylinder section 61 are on the same straight line, the diameter of the circular ring section 62 is larger than the diameter of the middle cylinder section 61, and the opposite sides of the two circular ring sections 62 abut against the side opposite to the mounting portion 10.

[0060] It should be noted that, during installation, first press the first buffer member 6 hard to deform it, then insert the first buffer member 6 into the annular opening 100, and then after being embedded in the annular opening 100, the first buffer member 6 is deformed and reset, and is snapped into the annular opening 100. Since the diameter of the circular ring segment 62 is larger than the diameter of the middle cylinder segment 61, and the opposite sides of the two circular ring segments 62 are respectively abutted against the opposite side of the mounting portion 10, the first buffer member 6 is not easy to fall off from the annular opening 100, and the first buffer member 6 and the annular opening 100 are detachably connected. In the event that the first buffer member 6 is damaged, it can be disassembled and replaced for easy maintenance.

[0061] As a preferred embodiment, the fixing member 7 in this embodiment includes an inserting section 71 and a connecting section 72, wherein the middle parts of the inserting section 71 and the connecting section 72 are hollow, the axes of the inserting section 71 and the connecting section 72 are on the same straight line, and the diameter of the connecting section 72 is larger than the diameter of the inserting section 71; one end of the inserting section 71 passes through the annular section 62 and extends into the middle tube section 61, and the outer wall of the inserting section 71 abuts against the inner walls of the annular section 62 and the middle tube section 61; the connecting section 72 is fixed to one side end of the inserting section 71, and the side of the connecting section 72 close to the first buffer member 6 abuts against the surface of the annular section 62.

[0062] It should be noted that the fixing member 7 is composed of a plug-in section 71 and a connecting section 72. The middle parts of the plug-in section 71 and the connecting section 72 are both hollow. This design not only reduces the weight of the fixing member 7, but also allows bolts or other fasteners to pass through them, making it convenient to connect with the external structure. One end of the plug-in section 71 passes through the annular section 62 and extends into the middle tube section 61, tightly abutting against the inner side walls of the annular section 62 and the middle tube section 61. This plug-in method not only ensures a stable connection between the fixing member 7 and the first buffer member 6, but also allows the first buffer member 6 to be able to expand or bend to a certain extent when it is impacted or vibrated, playing a buffering role. The connecting section 72 is fixed to one end of the plug-in section 71, and its side close to the first buffer member 6 abuts against the surface of the annular section 62. This design further enhances the connection stability between the fixing member 7 and the first buffer member 6, and also provides a stable connection point for external bolts or other fasteners.

[0063] In this embodiment, the plurality of second buffer members 9 are disposed at the corners of the cover body 8 , and the surfaces of the second buffer members 9 on one side away from the cover body 8 are located on the same plane.

[0064] It should be noted that by providing multiple second buffer members 9, the buffering effect between the cover body 8 and the inner wall of the battery pack shell can be effectively enhanced. By disposing multiple second buffer members 9 at the corners of the cover body 8, it can be ensured that when the cover body is impacted or vibrated, each corner can be fully protected to prevent the corner from being damaged due to excessive force. In addition, the surfaces of the side of the multiple second buffer members 9 away from the cover body 8 are on the same plane. Such a design is not only conducive to maintaining the flatness and stability of the cover body 8, but also ensures that the cover body and the inner wall of the battery pack shell fit more closely, reducing vibration and noise caused by gaps or unevenness.

[0065] In this embodiment, a plurality of counter-fasteners 810 are arranged on the outer side of the cover body 8, and a plurality of protrusions 110 and guide members 120 are arranged on the outer side of the bottom shell 1. The positions of the counter-fasteners 810 correspond one-to-one to the positions of the protrusions 110, and the protrusions 110 are snap-fitted into the counter-fasteners 810. The guide members 120 are arranged corresponding to the positions of the protrusions 110, and the inner side walls of the guide members 120 are in contact with the outer side walls of the counter-fasteners 810.

[0066] It should be noted that, by providing the counter-fastener 810 and the raised portion 110, the assembly process between the cover body 8 and the bottom shell 1 is simple and quick, and a quick and stable connection between the cover body 8 and the bottom shell 1 is achieved. It is only necessary to align the raised portion 110 with the counter-fastener 810, and then apply a certain force to snap the two together. At the same time, it is convenient for later disassembly and maintenance. The provided guide member 120 can provide a guiding function to ensure that during the assembly process, the counter-fastener 810 of the cover body 8 can be smoothly and accurately snapped with the raised portion 110 of the bottom shell 1; the inner side wall of the guide member 6 abuts against the outer side wall of the counter-fastener 810. When the two are close, the guide member 7 can guide the counter-fastener 810 into the correct position, which can improve the assembly efficiency and accuracy.

[0067] Working principle:

[0068] The first buffer member 6 is pressed hard to deform it, and then the first buffer member 6 is inserted into the annular opening 100. After being embedded in the annular opening 100, the first buffer member 6 is deformed and reset, and is clamped in the annular opening 100. Since the diameter of the annular segment 62 is larger than the diameter of the middle cylinder segment 61, and the opposite sides of the two annular segments 62 are respectively abutted against the opposite sides of the mounting portion 10, the first buffer member 6 is not easy to fall off from the annular opening 100. Then the fixing member 7 is inserted into the first buffer member 6, and the fixing member 7 is connected to the battery pack base by bolts passing through the fixing member 7, so that the bottom shell 1 is flexibly connected to the battery pack shell, which effectively reduces the vibration and noise transmission between the BDU controller and the bottom of the battery pack. At the same time, by arranging the second buffer member 9 on the surface of the cover body 8, the vibration transmission between the BDU controller and the top of the battery pack can be effectively reduced, thereby enhancing the installation stability of the BDU.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A BDU controller, characterized in that: include: Bottom shell (1); A main positive circuit (2) is arranged in the bottom shell (1) and connected to the positive electrode of the battery module on the vehicle. The main positive circuit (2) is provided with a fuse (21) and a main positive relay (22) which are electrically connected in sequence. The fuse (21) is mounted in the middle of the bottom shell (1), and the main positive relay (22) is arranged on one side of the fuse (21); A main negative circuit (3) is arranged in the bottom shell (1) and connected to the negative electrode of the battery module on the vehicle. The main negative circuit (3) is provided with a shunt (31) and a main negative relay (32) which are electrically connected in sequence. The shunt (31) is located at the edge of the bottom shell (1) on the side of the fuse (21) away from the main positive relay (22) and is arranged in parallel with the fuse (21). The main negative relay (32) is located between the fuse (21) and the shunt (31); The pre-charging circuit (4) is arranged in the bottom shell (1) and is located between the fuse (21) and the bottom wall of the bottom shell (1). The two ends of the pre-charging circuit (4) are respectively electrically connected to the input end of the fuse (21) and the output end of the main positive relay (22) for protecting the main positive circuit.

2. The BDU controller according to claim 1, characterized in that: The main positive circuit (2) further comprises a battery connection positive terminal row (23) and a main positive output terminal row (24), wherein: The battery connection positive terminal row (23) is arranged at a side edge of the bottom shell (1), and one end of the battery connection positive terminal row (23) is connected to the positive electrode of the battery module on the vehicle, and the other end is electrically connected to the input end of the fuse (21), and the output end of the fuse (21) is electrically connected to one end of the contact of the main positive relay (22); The main positive output terminal row (24) is arranged at the edge of the bottom shell (1) and is on the same side as the battery connection positive terminal row (23) and is arranged adjacent to each other. One end of the main positive output terminal row (24) is electrically connected to the other end of the contact of the main positive relay (22).

3. The BDU controller according to claim 2, characterized in that: The main negative circuit (3) further comprises a battery connection negative terminal row (33) and a main negative output terminal row (34), wherein: The battery connection negative terminal row (33) is arranged at the edge of the bottom shell (1) and is on the same side as the battery connection positive terminal row (23), and is arranged on the side of the battery connection positive terminal row (23) away from the main positive output terminal row (24). One end of the battery connection negative terminal row (33) is connected to the negative electrode of the battery module on the vehicle, and the other end is electrically connected to the input end of the shunt (31). The output end of the shunt (31) is electrically connected to one end of the contact of the main negative relay (32); The main negative output terminal row (34) is arranged at the edge of the bottom shell (1) and is on the same side as the battery connection positive terminal row (23), and is arranged on a side of the main positive output terminal row (24) away from the battery connection positive terminal row (23). The main negative output terminal row (34) is electrically connected to the other end of the contact of the main negative relay (32).

4. The BDU controller according to claim 3, characterized in that: The pre-charging circuit (4) comprises a pre-charging relay (41) and a pre-charging resistor (42), wherein: The pre-charging relay (41) is arranged in the bottom shell (1) and is located between the fuse (21) and the main positive relay (22); one end of the contact of the pre-charging relay (41) is electrically connected to the output end of the fuse (21); The pre-charging resistor (42) is arranged in the bottom shell (1) and is located directly below the fuse (21) and is arranged in parallel with the fuse (21); one end of the pre-charging resistor (42) is electrically connected to the other end of the contact of the pre-charging relay (41), and the other end is electrically connected to the main positive output terminal row (24).

5. The BDU controller according to claim 4, characterized in that: It also includes a fast charging positive circuit (5), the fast charging positive circuit (5) includes a fast charging relay (51) and a fast charging positive connection terminal row (52), wherein: The fast charging relay (51) is arranged in the bottom shell (1) and is located on a side of the pre-charging relay (41) away from the pre-charging resistor (42) and is on the same straight line as the pre-charging relay (41); one end of the contact of the fast charging relay (51) is electrically connected to the output end of the fuse (21); The fast-charging positive connection terminal row (52) is arranged at the edge of the bottom shell (1) and is on the same side as the battery connection positive terminal row (23), and is arranged on the side of the main negative output terminal row (34) away from the main positive output terminal row (24). The fast-charging positive connection terminal row (52) is electrically connected to the other end of the contact of the fast-charging relay (51).

6. The BDU controller according to claim 1, characterized in that: The bottom shell (1) is provided with a plurality of mounting portions (10), and a circular opening (100) is provided on a side of the mounting portion (10) away from the bottom shell (1), and a first buffer (6) is embedded in each of the circular openings (100). The first buffer (6) is arranged in a tubular shape, and two sides of the first buffer (6) respectively penetrate the circular opening (100) and extend outward, and a fixing member (7) is inserted into the first buffer (6), and the bottom shell (1) is connected and fixed to the battery pack shell by external bolts passing through the fixing member (7). The bottom shell (1) is also provided with a detachable cover body (8), and a plurality of second buffer members (9) are provided on a side of the cover body (8) away from the bottom shell (1), and the surfaces of the second buffer members (9) are all in contact with the inner wall of the battery pack shell.

7. The BDU controller according to claim 6, characterized in that: The first buffer member (6) comprises a middle tube section (61) and two annular sections (62), wherein: The middle cylinder section (61) is embedded in the annular opening (100), and the outer wall of the middle cylinder section (61) abuts against the inner wall of the annular opening (100); The two circular segments (62) are respectively fixed on the two side ends of the middle cylinder segment (61), and the axes of the two circular segments (62) and the middle cylinder segment (61) are located on the same straight line, the diameter of the circular segments (62) is larger than the diameter of the middle cylinder segment (61), and the opposite sides of the two circular segments (62) are respectively in contact with the opposite side of the mounting portion (10).

8. The BDU controller according to claim 7, characterized in that: The fixing member (7) comprises an inserting section (71) and a connecting section (72), wherein: The middle parts of the plug-in section (71) and the connecting section (72) are both hollow, the axes of the plug-in section (71) and the connecting section (72) are on the same straight line, and the diameter of the connecting section (72) is larger than the diameter of the plug-in section (71); One end of the plug-in section (71) passes through the annular section (62) and extends into the middle tube section (61), and the outer side wall of the plug-in section (71) abuts against the inner side walls of the annular section (62) and the middle tube section (61); The connecting section (72) is fixed to one end of the plug-in section (71), and a side of the connecting section (72) close to the first buffer (6) abuts against the surface of the annular section (62).

9. The BDU controller according to claim 8, characterized in that: The plurality of second buffer members (9) are arranged at the corners of the cover body (8), and the surfaces of one side of the plurality of second buffer members (9) away from the cover body (8) are located on the same plane.

10. The BDU controller according to claim 6, characterized in that: A plurality of buckles (810) are arranged on the outer side of the cover body (8), and a plurality of protrusions (110) and guide members (120) are arranged on the outer side of the bottom shell (1). The positions of the buckles (810) correspond to the positions of the protrusions (110) one by one, and the protrusions (110) are snap-fitted into the buckles (810). The guide members (120) are arranged corresponding to the positions of the protrusions (110), and the inner side walls of the guide members (120) are in contact with the outer side walls of the buckles (810).

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