BDU controller

Abstract

The BDU controller comprises a shell, a main positive loop, a main negative loop and a pre-charging loop, the main positive loop is arranged in the shell, a fuse and a main positive relay which are electrically connected in sequence are arranged on the main positive loop, the fuse is erected in the middle of the shell, and the main positive relay is arranged on one side of the fuse; the main negative loop is arranged in the 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 shell on the side, away from the main positive relay, of the fuse and is parallel to the fuse, and the main negative relay is located between the fuse and the diverter; the pre-charging loop is arranged in the shell, located between the fuse and the bottom wall of the 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 shell, the internal space of the shell can be more compact, and the space utilization rate is effectively improved.

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] case;

[0008] A main positive circuit is arranged in the housing, and a fuse and a main positive relay are arranged on the main positive circuit, which are electrically connected in sequence. The fuse is arranged in the housing, and the main positive relay is arranged in the middle of the housing. The fuse and the main positive relay are arranged in parallel and at intervals;

[0009] A main negative circuit is arranged in the housing, and a shunt and a main negative relay are provided on the main negative circuit, which are electrically connected in sequence. The shunt is arranged in the housing, and is arranged on both sides of the housing with the fuse, and the main negative relay is located between the shunt and the main positive relay;

[0010] A heating circuit is arranged in the shell, and a heating relay is provided on the heating circuit. The heating relay is electrically connected to the main positive circuit, and the heating relay is located between the fuse and the main positive relay.

[0011] On the basis of the above technical solution, preferably, the main positive circuit further includes a positive terminal connection bar, a first connection copper bar, a second connection copper bar and a third connection copper bar, wherein:

[0012] Two first protrusions are arranged in the shell, the first protrusions are extended along the height direction of the shell, and the two first protrusions are arranged opposite to each other at an interval;

[0013] The positive connection terminal row is arranged at one side of the length direction of the housing, and corresponds to the position of one of the first protrusions, and is perpendicular to each other;

[0014] One end of the first connecting copper bar is fixedly connected to the connecting positive terminal bar, and the other end is fixed to the first protrusion via a bolt corresponding to the end of the fuse;

[0015] One end of the second connecting copper bar is fixed to another first protrusion with the other end of the fuse by bolts, and the other end of the second connecting copper bar is fixedly connected to one end of the contact of the main positive relay by bolts;

[0016] The third connecting copper bar has a first positive output end and a second positive output end, the first positive output end and the second positive output end of the third connecting copper bar are respectively arranged on both sides of the length direction of the shell, and the second positive output end of the third connecting copper bar is arranged on the same side as the connecting positive end bar;

[0017] The first positive output end of the third connecting copper bar serves as the positive connection end of the PCM, and the second positive output end of the third connecting copper bar serves as the positive connection end of the ODP.

[0018] On the basis of the above technical solution, preferably, the main positive circuit further includes a first fuse and a fourth connecting copper bar, wherein:

[0019] The third connecting copper bar further includes a third positive output terminal, and the third positive output terminal of the third connecting copper bar is located on the same side as the second positive output terminal of the third connecting copper bar and is vertically arranged and is arranged toward the fuse side;

[0020] One end of the first fuse is fixed to the third positive output end of the third connecting copper bar and is parallel to each other;

[0021] One end of the fourth connecting copper bar is fixedly connected to the other end of the first fuse, and the fourth connecting copper bar is vertically arranged to the first fuse. The fourth connecting copper bar is located between the fuse and the main positive relay, and is arranged on the side of the second connecting copper bar close to the bottom wall of the shell. The other end of the fourth connecting copper bar is arranged on the same side as the first positive output end of the third connecting copper bar; the other end of the fourth connecting copper bar serves as the positive connection end of the PTC.

[0022] On the basis of the above technical solution, preferably, it further comprises a pre-charging circuit, wherein the pre-charging circuit comprises a pre-charging resistor and a pre-charging relay, wherein:

[0023] The pre-charging resistor is arranged in the shell and is located on a side of the fuse close to the bottom wall of the shell and parallel to the fuse. One end of the pre-charging resistor is electrically connected to the other end of the fuse through a wiring harness.

[0024] The bottom surface of the housing is provided with a first mounting groove, and the first mounting groove is located on a side of the pre-charging relay away from the main positive relay;

[0025] The pre-charging relay is clamped in the first installation groove, and one end of the pre-charging relay contact is electrically connected to the other end of the pre-charging resistor, and the other end of the pre-charging relay contact is electrically connected to the other end of the contact of the main positive relay through a wiring harness.

[0026] On the basis of the above technical solution, preferably, the heating circuit further includes a fifth connecting copper bar, a second fuse and a sixth connecting copper bar, wherein:

[0027] A second mounting groove is provided on the bottom surface of the housing, the second mounting groove is located between the fuse and the main positive relay, the heating relay is clamped in the second mounting groove, and the other end of the contact of the pre-charging relay is electrically connected to one end of the contact of the heating relay;

[0028] Two second protrusions are arranged in the housing, the two second protrusions are arranged opposite to each other at an interval, and are located on a side of the first fuse away from the third connecting copper bar, and are on the same straight line as the first fuse;

[0029] One end of the fifth connecting copper bar and one end of the second fuse are fixed to the second protrusion by bolts, one end of the sixth connecting copper bar and the other end of the second fuse are fixed to another second protrusion by bolts, the other ends of the fifth connecting copper bar and the sixth connecting copper bar both penetrate the housing, and the other end of the contact of the heating relay is electrically connected to the other end of the fifth connecting copper bar through a wiring harness;

[0030] An output portion is provided on the sixth connecting copper bar, and the output portion of the sixth connecting copper bar is located between the first fuse and the second fuse. The output portion of the sixth connecting copper bar serves as a positive connection end of the heating circuit.

[0031] On the basis of the above technical solution, preferably, the main negative circuit further includes a negative terminal connection bar, a seventh connection copper bar, an eighth connection copper bar and a ninth connection copper bar, wherein:

[0032] The negative connection terminal row is arranged on one side of the length direction of the shell, and is located on the same side as the positive connection terminal row, and is arranged at both ends of the shell;

[0033] The shunt is arranged in the housing and is arranged corresponding to the position of the negative terminal row and is perpendicular to each other;

[0034] The seventh connecting copper bar is fixed between the shunt and the negative terminal connection bar;

[0035] The eighth connecting copper bar is fixed between the other end of the shunt and one end of the main negative relay contact;

[0036] The ninth connecting copper bar is fixed on the other end of the main negative relay contact, and the ninth connecting copper bar has a first negative output terminal, a second negative output terminal and a third negative output terminal. The first negative output terminal of the ninth connecting copper bar is on the same side as the negative terminal bar, and is arranged adjacent to the second positive output terminal of the third connecting copper bar. The second negative output terminal and the third negative output terminal of the ninth connecting copper bar are on the same side as the first positive output terminal of the third connecting copper bar, and the second negative output terminal of the ninth connecting copper bar is arranged adjacent to the first positive output terminal of the third connecting copper bar.

[0037] The first negative output end of the ninth connecting copper bar is used as the negative connection end of the ODP, the second negative output end of the ninth connecting copper bar is used as the negative connection end of the PCM, and the third negative output end of the ninth connecting copper bar is used as the negative connection end of the PTC or heating circuit.

[0038] On the basis of the above technical solution, preferably, it further comprises a cover body and a plurality of clamping mechanisms, wherein:

[0039] The outer contour of the cover body matches the outer contour of the shell, and the cover body abuts against the shell;

[0040] The plurality of clamping mechanisms are arranged between the cover body and the shell, and the cover body is fixed on the shell through the clamping mechanisms.

[0041] On the basis of the above technical solution, preferably, the clamping mechanism includes a plurality of undercuts, protrusions and guides, wherein:

[0042] A plurality of undercut parts are arranged on the outer side of the cover body;

[0043] A plurality of protrusions and guide members are arranged on the outside of the shell, and the positions of the protrusions and the undercuts are arranged one by one. The protrusions are clamped on the undercuts, and the guide members are arranged corresponding to the positions of the protrusions, and the inner wall of the guide member abuts against the outer wall of the undercut.

[0044] On the basis of the above technical solution, preferably, it also includes a plurality of shielding mechanisms, wherein the plurality of shielding mechanisms are all arranged on the cover body, and respectively correspond to the positions of the positive terminal row, the negative terminal row, the first positive output terminal and the second positive output terminal of the third connecting copper bar, the other end of the fourth connecting copper bar, the positive connecting end of the heating circuit, the first negative output terminal, the second negative output terminal and the third negative output terminal of the ninth connecting copper bar, and are used for protecting the connecting terminal row.

[0045] On the basis of the above technical scheme, preferably, the shielding mechanism includes a plurality of covers and clamps, wherein the cover body is provided with a plurality of windows, which respectively correspond to the positions of the positive terminal row, the negative terminal row, the first positive output terminal and the second positive output terminal of the third connecting copper bar, the other end of the fourth connecting copper bar, the positive connecting end of the heating circuit, the first negative output terminal, the second negative output terminal and the third negative output terminal of the ninth connecting copper bar, a plurality of covers are hinged in each window, and the clamps are arranged on the outside of the covers, and the covers are clamped in the windows through the clamps.

[0046] The BDU controller of the utility model has the following beneficial effects compared with the prior art:

[0047] (1) The main positive circuit, the main negative circuit and the heating circuit are all arranged in the shell, and the components of each circuit are reasonably arranged, so that the internal space of the shell can be made more compact, effectively improving the space utilization rate;

[0048] (2) The first negative output end of the ninth connecting copper bar is on the same side as the negative terminal row and is adjacent to the second positive output end of the third connecting copper bar. The second negative output end of the ninth connecting copper bar is adjacent to the first positive output end of the third connecting copper bar, so that the external positive and negative terminal rows are adjacently arranged, further optimizing the spatial layout of the system, reducing the span between the positive and negative connection points, and improving the connection efficiency;

[0049] (3) The fastening mechanism can realize the quick disassembly and assembly between the cover body and the shell, and a plurality of the fastening mechanisms are evenly distributed between the cover body and the shell, thereby improving the stability of the connection between the cover body and the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] 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.

[0051] Figure 1 It is a three-dimensional diagram of the BDU controller of the utility model;

[0052] Figure 2 This is a three-dimensional diagram of the internal structure of the housing of the BDU controller of the present utility model;

[0053] Figure 3 This is a three-dimensional diagram of the housing of the BDU controller of the utility model;

[0054] Figure 4 This is a corrosion diagram of the component connection structure of the BDU controller of the utility model;

[0055] Figure 5 This is a three-dimensional diagram of the ninth connection copper bar of the BDU controller of the utility model;

[0056] Figure 6 This is a three-dimensional diagram of the third connection copper bar of the BDU controller of the utility model;

[0057] Figure 7 This is a bottom view of the BDU controller of the utility model;

[0058] Figure 8 It is a front view of the BDU controller of the utility model;

[0059] Fig. 9 It is a top view of the BDU controller of the present utility model. DETAILED DESCRIPTION

[0060] 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.

[0061] like Figure 1-9 As shown, a BDU controller of the utility model includes a housing 1, a main positive circuit 2, a main negative circuit 3 and a heating circuit 4.

[0062] Among them, the main positive circuit 2 is arranged in the shell 1, and 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 shell 1, and the main positive relay 22 is located in the middle of the shell 1, and the fuse 21 and the main positive relay 22 are spaced and arranged in parallel; the main negative circuit 3 is arranged in the shell 1, and 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 mounted in the shell 1, and is separated from the fuse 21 on both sides of the shell 1, and the main negative relay 32 is located between the shunt 31 and the main positive relay 22; the heating circuit 4 is arranged in the shell 1, and the heating circuit 4 is provided with a heating relay 41, the heating relay 41 is electrically connected to the main positive circuit 2, and the heating relay 41 is located between the fuse 21 and the main positive relay 22.

[0063] It should be noted that the controller mainly includes a housing 1, a main positive circuit 2, a main negative circuit 3 and a heating circuit 4. The main positive circuit 2 and the main negative circuit 3 are the main channels responsible for power transmission. The main positive circuit 2 is connected to the positive electrode of the battery module, and the transmission and control of power are realized through the fuse 21 and the main positive relay 22. In addition, the electrical connection between the heating relay 41 and the main positive circuit 2 ensures that the heating system only operates when needed. Similarly, the main negative circuit 3 is connected to the negative electrode of the battery module, and the reflux control of power is completed through the shunt 31 and the main negative relay 32. In addition, the fuse 21 is set in the shell 1, and the main positive relay 22 is set in the middle of the shell 1, and the fuse 21 and the main positive relay 22 are spaced and arranged in parallel; the shunt 31 is set in the shell 1, and is separated from the fuse 21 on both sides of the shell 1, and the main negative relay 32 is located between the shunt 31 and the main positive relay 22; the heating relay 41 is located between the fuse 21 and the main positive relay 22. The positions of the components in the shell 1 are reasonably arranged, and the space is fully utilized, so that the entire controller has a compact structure and is easy to install and maintain.

[0064] The main positive circuit 2 in this embodiment also includes a positive terminal row 23, a first copper connection row 24, a second copper connection row 25 and a third copper connection row 26, wherein two first protrusions 11 are arranged in the shell 1, the first protrusions 11 are extended along the height direction of the shell 1, and the two first protrusions 11 are arranged opposite to each other at intervals; the positive terminal row 23 is arranged on one side of the length direction of the shell 1, and corresponds to the position of one of the first protrusions 11, and is perpendicular to each other; one end of the first copper connection row 24 is fixedly connected to the positive terminal row 23, and the other end corresponding to the fuse 21 is fixed to the first protrusion 11 by bolts; the second copper connection row 24 is fixedly connected to the positive terminal row 23, and the other end is fixed to the first protrusion 11 by bolts; One end of the copper bar 25 is fixed to another first protrusion 11 with the other end of the fuse 21 by bolts, and the other end of the second connecting copper bar 25 is fixedly connected to one end of the contact of the main positive relay 22 by bolts; the third connecting copper bar 26 has a first positive output end and a second positive output end, and the first positive output end and the second positive output end of the third connecting copper bar 26 are respectively arranged on both sides of the length direction of the shell 1, and the second positive output end of the third connecting copper bar 26 is arranged on the same side as the connecting positive end row 23; the first positive output end of the third connecting copper bar 26 serves as the positive connection end of the PCM, and the second positive output end of the third connecting copper bar 26 serves as the positive connection end of the ODP.

[0065] It should be noted that when the power supply is connected to the system, the current first enters the main positive circuit 2 by connecting the positive terminal bar 23, and the current is transmitted to the fuse 21 through the first connecting copper bus 24. The fuse 21 plays the role of overcurrent protection. Once excessive current or abnormal situation is detected, it will automatically disconnect the circuit to protect the safety of downstream equipment and the entire system. If the current passes through the fuse 21 normally, it will continue to be transmitted to the main positive relay 22 through the second connecting copper bus 25. The main positive relay 22 performs on-off operations according to the system control signal to control the further transmission of the current. Finally, the current is distributed through the two positive output terminals of the third connecting copper bus 26. The first positive output terminal serves as the positive connection terminal of the PCM; the second positive output terminal serves as the positive connection terminal of the ODP.

[0066] The main positive circuit 2 in this embodiment also includes a first fuse 27 and a fourth connecting copper bar 28, wherein the third connecting copper bar 26 also includes a third positive output end, and the third positive output end of the third connecting copper bar 26 is located on the same side as the second positive output end of the third connecting copper bar 26 and is vertically arranged, and is arranged toward the fuse 21 side; one end of the first fuse 27 is fixed on the third positive output end of the third connecting copper bar 26, and is parallel to each other; one end of the fourth connecting copper bar 28 is fixedly connected to the other end of the first fuse 27, and the fourth connecting copper bar 28 is vertically arranged with the first fuse 27, the fourth connecting copper bar 28 is located between the fuse 21 and the main positive relay 22, and is arranged on the side of the second connecting copper bar 25 close to the bottom wall of the shell 1, and the other end of the fourth connecting copper bar 28 is arranged on the same side as the first positive output end of the third connecting copper bar 26; the other end of the fourth connecting copper bar 28 serves as the positive connection end of the PTC.

[0067] It should be noted that the current flows through the third positive output terminal of the third connecting copper bar 26 and the first fuse 27. The first fuse 27 serves as an additional overcurrent protection element and can melt when the current is abnormal to protect the PTC from overcurrent damage. If the current is normal, it will continue to be transmitted to the fourth connecting copper bar 28 through the first fuse 27, and finally provide electrical energy to the PTC through the other end of the fourth connecting copper bar 28. The fourth connecting copper bar 28 is located between the fuse 21 and the main positive relay 22, and is arranged close to the bottom wall of the shell 1. This setting can optimize the spatial layout while ensuring stable current transmission.

[0068] The present embodiment also includes a pre-charging circuit 5, which includes a pre-charging resistor 51 and a pre-charging relay 52, wherein the pre-charging resistor 51 is arranged in the shell 1, and is arranged on the side of the fuse 21 close to the bottom wall of the shell 1, and is parallel to the fuse 21, and one end of the pre-charging resistor 51 is electrically connected to the other end of the fuse 21 through a wiring harness; a first mounting groove 100 is opened on the bottom surface of the shell 1, and the first mounting groove 100 is located on the side of the pre-charging relay 52 away from the main positive relay 22; the pre-charging relay 52 is clamped in the first mounting groove 100, and one end of the contact of the pre-charging relay 52 is electrically connected to the other end of the pre-charging resistor 51, and the other end of the contact of the pre-charging relay 52 is electrically connected to the other end of the contact of the main positive relay 22 through a wiring harness.

[0069] It should be noted that the pre-charging circuit 5 is used to pre-charge the system at the initial stage of system power-on to protect the capacitors and other sensitive components in the system from large current shocks. Specifically, when the system is powered on, the pre-charging relay 52 is first controlled to close. At this time, the current flows from the fuse 21 of the main positive circuit 2 through the pre-charging resistor 51. Due to the existence of the pre-charging resistor 51, the current is limited to a smaller value, avoiding the large current shock at the moment of power-on. The pre-charging resistor 51 slowly charges the electric energy into the capacitor or other components that need to be pre-charged in the system; as the voltage of the capacitor or other components gradually increases, the system control circuit detects that the pre-charging process is completed, and then controls the pre-charging relay 52 to disconnect, and at the same time controls the main positive relay 22 to close. At this time, the current directly enters the main working part of the system through the main positive relay 22, and the system enters a normal working state. In addition, the pre-charging resistor 51 is located on the side of the fuse 21 close to the bottom wall of the shell 1, and is parallel to the fuse 21. This layout optimizes space utilization and makes the entire system more compact.

[0070] The heating circuit 4 in this embodiment also includes a fifth connecting copper bar 42, a second fuse 43 and a sixth connecting copper bar 44, wherein a second mounting groove 110 is provided on the bottom surface of the shell 1, the second mounting groove 110 is located between the fuse 21 and the main positive relay 22, the heating relay 41 is clamped in the second mounting groove 110, and the other end of the contact of the pre-charge relay 52 is electrically connected to one end of the contact of the heating relay 41; two second protrusions 12 are arranged in the shell 1, the two second protrusions 12 are arranged opposite to each other at an interval, and are located on the side of the first fuse 27 away from the third connecting copper bar 26, and are in the same straight line with the first fuse 27; the fifth One end of the connecting copper bar 42 and one end of the second fuse 43 are fixed to the second protrusion 12 by bolts, one end of the sixth connecting copper bar 44 and the other end of the second fuse 43 are fixed to another second protrusion 12 by bolts, the other ends of the fifth connecting copper bar 42 and the sixth connecting copper bar 44 both pass through the shell 1, and the other end of the contact of the heating relay 41 is electrically connected to the other end of the fifth connecting copper bar 42 through a wiring harness; the sixth connecting copper bar 44 is provided with an output part, and the output part of the sixth connecting copper bar 44 is located between the first fuse 27 and the second fuse 43, and the output part of the sixth connecting copper bar 44 serves as the positive connection end of the heating circuit 4.

[0071] It should be noted that the heating circuit 4 controls the on and off of the heating equipment to ensure that the system can perform heating operations when needed. When the system needs to start the heating function, the heating relay 41 is controlled to close. At this time, the current flows from the main positive circuit 2 into the heating circuit 4 through the contacts of the heating relay 41. The current first passes through the fifth connecting copper bus 42 and the second fuse 43. The second fuse 43 serves as an overcurrent protection element. It can melt when the current is abnormal to protect the equipment in the heating circuit 4 from damage. Subsequently, the current is transmitted through the sixth connecting copper bus 44 and finally flows out through the output part on the sixth connecting copper bus 44 to provide electrical energy for the heating equipment. The reasonable layout of the fifth connecting copper bus 42, the second fuse 43 and the sixth connecting copper bus 44 not only ensures the stable transmission of current, but also optimizes space utilization, making the system more compact.

[0072] The main negative circuit 3 in this embodiment also includes a negative terminal connection row 33, a seventh connection copper bar 34, an eighth connection copper bar 35 and a ninth connection copper bar 36, wherein the negative terminal connection row 33 is arranged on one side of the length direction of the shell 1, and is located on the same side as the positive terminal connection row 23, and is arranged at both ends of the shell 1; the shunt 31 is arranged in the shell 1, and is arranged corresponding to the position of the negative terminal connection row 33, and is perpendicular to each other; the seventh connection copper bar 34 is fixed between the shunt 31 and the negative terminal connection row 33; the eighth connection copper bar 35 is fixed between the other end of the shunt 31 and one end of the contact of the main negative relay 32; the ninth connection copper bar 36 is fixed on the other end of the contact of the main negative relay 32, and the ninth connection copper bar 36 has the seventh connection copper bar 34. a negative output terminal, a second negative output terminal and a third negative output terminal, the first negative output terminal of the ninth connecting copper bar 36 is on the same side as the negative terminal row 33, and is arranged adjacent to the second positive output terminal of the third connecting copper bar 26, the second negative output terminal and the third negative output terminal of the ninth connecting copper bar 36 are on the same side as the first positive output terminal of the third connecting copper bar 26, and the second negative output terminal of the ninth connecting copper bar 36 is arranged adjacent to the first positive output terminal of the third connecting copper bar 26; the first negative output terminal of the ninth connecting copper bar 36 serves as the negative connection terminal of the ODP, the second negative output terminal of the ninth connecting copper bar 36 serves as the negative connection terminal of the PCM, and the third negative output terminal of the ninth connecting copper bar 36 serves as the negative connection terminal of the PTC or heating circuit 4.

[0073] It should be noted that the current enters the system from the negative terminal row 33, which is arranged on one side of the length direction of the shell 1, corresponding to the positive terminal row 23 and located on the same side. The current flows through the negative terminal row 33 and enters the shunt 31 through the seventh connecting copper bar 34. The current flows out from the other end of the shunt 31 and is connected to one end of the contact of the main negative relay 32 through the eighth connecting copper bar 35. When the main negative relay 32 is closed, the current can flow through its contact to the ninth connecting copper bar 36. The ninth connecting copper bar 36 has three negative output terminals, which correspond to the negative connection terminals of ODP, PCM and PTC or the heating circuit 4, respectively, allowing current to be supplied to these different components at the same time.

[0074] This example also includes a cover body 6 and a plurality of snap-in mechanisms 7, wherein the outer contour of the cover body 6 matches the outer contour shape of the shell 1, and the cover body 6 abuts against the shell 1; the plurality of snap-in mechanisms 7 are disposed between the cover body 6 and the shell 1, and the cover body 6 is fixed to the shell 1 through the snap-in mechanisms 7.

[0075] It should be noted that a plurality of snap-fit ​​mechanisms 7 are evenly distributed between the cover body 6 and the housing 1 to achieve installation stability between the cover body 6 and the housing 1 , and the cover body 6 and the housing 1 can be assembled and disassembled through the snap-fit ​​mechanisms 7 .

[0076] The clamping mechanism 7 in this embodiment includes a plurality of reverse snap members 71, protrusions 72 and guide members 73, wherein the plurality of reverse snap members 71 are arranged on the outer side of the cover body 6; the plurality of protrusions 72 and guide members 73 are arranged on the outer side of the shell 1, and the positions of the protrusions 72 and the reverse snap members 71 are arranged in a one-to-one correspondence, the protrusions 72 are clamped on the reverse snap members 71, the guide members 73 are arranged corresponding to the positions of the protrusions 72, and the inner wall of the guide member 73 is in contact with the outer wall of the reverse snap member 71.

[0077] It should be noted that, by providing the counter-clockwise snap member 71 and the protrusion 72, the assembly process between the cover body 6 and the shell 1 is simple and quick, and a quick and stable connection between the cover body 6 and the shell 1 is achieved. It is only necessary to align the protrusion 72 with the counter-clockwise snap member 71, and then apply a certain force to snap the two together. At the same time, it is convenient for later disassembly and maintenance. The guide member 73 provided can provide a guiding function to ensure that during the assembly process, the counter-clockwise snap member 71 of the cover body 6 can be smoothly and accurately snapped with the protrusion 72 of the shell 1; the inner side wall of the guide member 73 abuts against the outer side wall of the counter-clockwise snap member 71. When the two are close, the guide member 73 can guide the counter-clockwise snap member 71 into the correct position, which can improve the assembly efficiency and accuracy.

[0078] The present embodiment also includes a plurality of shielding mechanisms 8, wherein the plurality of shielding mechanisms 8 are all arranged on the cover body 6, and respectively correspond to the positions of the positive connection terminal row 23, the negative connection terminal row 33, the first positive output terminal and the second positive output terminal of the third connection copper bar 26, the other end of the fourth connection copper bar 28, the positive connection terminal of the heating circuit 4, the first negative output terminal, the second negative output terminal and the third negative output terminal of the ninth connection copper bar 36, and are used for protecting the connection terminal rows.

[0079] As a preferred embodiment, the shielding mechanism 8 in this embodiment includes a plurality of covers 81 and clamps 82, wherein a plurality of windows 600 are opened on the cover body 6, and the plurality of windows 600 respectively correspond to the positions of the positive terminal row 23, the negative terminal row 33, the first positive output terminal and the second positive output terminal of the third connecting copper bar 26, the other end of the fourth connecting copper bar 28, the positive connecting end of the heating circuit 4, the first negative output terminal, the second negative output terminal and the third negative output terminal of the ninth connecting copper bar 36, and the plurality of covers 81 are hinged in each window 600, and the clamps 82 are arranged on the outside of the covers 81, and the covers 81 are clamped in the windows 600 through the clamps 82.

[0080] It should be noted that the shielding mechanism 8 is provided to prevent external objects from directly contacting the connection terminal row, thereby preventing the safety hazard of short circuit. When the system needs to be inspected or maintained, the cover 81 can be opened by the clamp 82, so that the connection terminal row can be easily disassembled and installed, which is convenient for installation and maintenance;

[0081] Working principle:

[0082] The main positive circuit 2 is connected to the positive pole of the battery module, and the transmission and control of electric energy are realized through the fuse 21 and the main positive relay 22. In addition, the electrical connection between the heating relay 41 and the main positive circuit 2 ensures that the heating system only operates when needed. Similarly, the main negative circuit 3 is connected to the negative pole of the battery module, and the reflux control of electric energy is completed through the shunt 31 and the main negative relay 32.

[0083] 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: Housing (1); A main positive circuit (2) is arranged in the housing (1), and a fuse (21) and a main positive relay (22) are provided on the main positive circuit (2), which are electrically connected in sequence. The fuse (21) is mounted in the housing (1), and the main positive relay (22) is arranged in the middle of the housing (1). The fuse (21) and the main positive relay (22) are arranged in parallel with each other at an interval. A main negative circuit (3) is arranged in the housing (1), and a shunt (31) and a main negative relay (32) are provided on the main negative circuit (3), which are electrically connected in sequence. The shunt (31) is mounted in the housing (1), and is arranged on both sides of the housing (1) with the fuse (21), and the main negative relay (32) is located between the shunt (31) and the main positive relay (22); A heating circuit (4) is arranged in the housing (1); a heating relay (41) is provided on the heating circuit (4); the heating relay (41) is electrically connected to the main positive circuit (2), and the heating relay (41) is located between the fuse (21) and the main positive relay (22).

2. The BDU controller according to claim 1, characterized in that: The main positive circuit (2) further comprises a connecting positive terminal bar (23), a first connecting copper bar (24), a second connecting copper bar (25) and a third connecting copper bar (26), wherein: Two first protrusions (11) are arranged in the shell (1), the first protrusions (11) are extended along the height direction of the shell (1), and the two first protrusions (11) are arranged opposite to each other at an interval; The connecting positive terminal row (23) is arranged on one side of the housing (1) in the length direction, and corresponds to the position of one of the first protruding portions (11), and is perpendicular to each other; One end of the first connecting copper bar (24) is fixedly connected to the connecting positive terminal bar (23), and the other end is fixed to the first protruding portion (11) via a bolt corresponding to the end of the fuse (21); One end of the second connecting copper bar (25) is fixed to another first protruding portion (11) via a bolt and the other end of the fuse (21), and the other end of the second connecting copper bar (25) is fixedly connected to one end of the contact of the main positive relay (22) via a bolt; The third connecting copper bar (26) has a first positive output end and a second positive output end, the first positive output end and the second positive output end of the third connecting copper bar (26) are arranged on both sides of the length direction of the housing (1), and the second positive output end of the third connecting copper bar (26) is arranged on the same side as the connecting positive end bar (23); The first positive output end of the third connecting copper busbar (26) serves as the positive connection end of the PCM, and the second positive output end of the third connecting copper busbar (26) serves as the positive connection end of the ODP.

3. The BDU controller according to claim 2, characterized in that: The main positive circuit (2) further comprises a first fuse (27) and a fourth connecting copper bar (28), wherein: The third connecting copper bar (26) further comprises a third positive output end, the third positive output end of the third connecting copper bar (26) being located on the same side as the second positive output end of the third connecting copper bar (26) and being arranged vertically, and being arranged towards the fuse (21); One end of the first fuse (27) is fixed to the third positive output end of the third connecting copper bar (26) and is parallel to each other; One end of the fourth connecting copper bar (28) is fixedly connected to the other end of the first fuse (27), and the fourth connecting copper bar (28) and the first fuse (27) are arranged vertically. The fourth connecting copper bar (28) is located between the fuse (21) and the main positive relay (22), and is arranged on one side of the second connecting copper bar (25) close to the bottom wall of the housing (1). The other end of the fourth connecting copper bar (28) is arranged on the same side as the first positive output end of the third connecting copper bar (26); the other end of the fourth connecting copper bar (28) serves as the positive connection end of the PTC.

4. The BDU controller according to claim 3, characterized in that: It also includes a pre-charging circuit (5), the pre-charging circuit (5) including a pre-charging resistor (51) and a pre-charging relay (52), wherein: The pre-charging resistor (51) is arranged in the housing (1) and is located on a side of the fuse (21) close to the housing (1) and close to the bottom wall, and is parallel to the fuse (21); one end of the pre-charging resistor (51) is electrically connected to the other end of the fuse (21) via a wiring harness; The bottom surface of the housing (1) is provided with a first installation groove (100), and the first installation groove (100) is located on a side of the pre-charging relay (52) away from the main positive relay (22); The pre-charging relay (52) is clamped in the first mounting groove (100), and one end of the contact of the pre-charging relay (52) is electrically connected to the other end of the pre-charging resistor (51), and the other end of the contact of the pre-charging relay (52) is electrically connected to the other end of the contact of the main positive relay (22) through a wiring harness.

5. The BDU controller according to claim 4, characterized in that: The heating circuit (4) further comprises a fifth connecting copper bar (42), a second fuse (43) and a sixth connecting copper bar (44), wherein: The bottom surface of the housing (1) is provided with a second mounting groove (110), the second mounting groove (110) being located between the fuse (21) and the main positive relay (22), the heating relay (41) being snap-fitted into the second mounting groove (110), and the other end of the contact of the pre-charging relay (52) being electrically connected to one end of the contact of the heating relay (41); Two second protrusions (12) are arranged in the housing (1), the two second protrusions (12) are arranged opposite to each other at an interval, and are located on a side of the first fuse (27) away from the third connecting copper bar (26), and are on the same straight line as the first fuse (27); One end of the fifth connecting copper bar (42) and one end of the second fuse (43) are fixed to the second protruding portion (12) by bolts, one end of the sixth connecting copper bar (44) and the other end of the second fuse (43) are fixed to another second protruding portion (12) by bolts, the other ends of the fifth connecting copper bar (42) and the sixth connecting copper bar (44) both pass through the housing (1), and the other end of the contact of the heating relay (41) is electrically connected to the other end of the fifth connecting copper bar (42) by a wiring harness; An output portion is provided on the sixth connecting copper bar (44), the output portion of the sixth connecting copper bar (44) is located between the first fuse (27) and the second fuse (43), and the output portion of the sixth connecting copper bar (44) serves as the positive connection end of the heating circuit (4).

6. The BDU controller according to claim 5, characterized in that: The main negative circuit (3) further comprises a negative terminal connection bar (33), a seventh connection copper bar (34), an eighth connection copper bar (35) and a ninth connection copper bar (36), wherein: The negative connection terminal row (33) is arranged on one side of the housing (1) in the length direction and is located on the same side as the positive connection terminal row (23), and is arranged at both ends of the housing (1); The shunt (31) is arranged in the housing (1) and is arranged corresponding to the position of the negative terminal row (33) and is perpendicular to each other; The seventh connecting copper bar (34) is fixed between the shunt (31) and the negative terminal connecting bar (33); The eighth connecting copper bar (35) is fixed between the other end of the shunt (31) and one end of the contact of the main negative relay (32); The ninth connecting copper bar (36) is fixed on the other end of the contact of the main negative relay (32), and the ninth connecting copper bar (36) has a first negative output end, a second negative output end and a third negative output end. The first negative output end of the ninth connecting copper bar (36) is on the same side as the connecting negative end bar (33), and is arranged adjacent to the second positive output end of the third connecting copper bar (26). The second negative output end and the third negative output end of the ninth connecting copper bar (36) are on the same side as the first positive output end of the third connecting copper bar (26), and the second negative output end of the ninth connecting copper bar (36) is arranged adjacent to the first positive output end of the third connecting copper bar (26); The first negative output end of the ninth connecting copper bar (36) serves as the negative connection end of the ODP, the second negative output end of the ninth connecting copper bar (36) serves as the negative connection end of the PCM, and the third negative output end of the ninth connecting copper bar (36) serves as the negative connection end of the PTC or heating circuit (4).

7. The BDU controller according to claim 1, characterized in that: It also includes a cover body (6) and a plurality of clamping mechanisms (7), wherein: The outer contour of the cover body (6) matches the outer contour of the shell (1), and the cover body (6) abuts against the shell (1); The plurality of clamping mechanisms (7) are arranged between the cover body (6) and the shell (1), and the cover body (6) is fixed to the shell (1) via the clamping mechanisms (7).

8. The BDU controller according to claim 7, characterized in that: The clamping mechanism (7) comprises a plurality of undercuts (71), a protruding portion (72) and a guide member (73), wherein: A plurality of undercut parts (71) are arranged on the outer side of the cover body (6); A plurality of protrusions (72) and guide members (73) are arranged on the outside of the housing (1), and the positions of the protrusions (72) and the undercut members (71) are arranged in a one-to-one correspondence, the protrusions (72) are clamped on the undercut members (71), the guide members (73) are arranged in a corresponding position to the protrusions (72), and the inner wall of the guide member (73) is in contact with the outer wall of the undercut member (71).

9. The BDU controller according to claim 6, characterized in that: It also includes a plurality of shielding mechanisms (8), wherein the plurality of shielding mechanisms (8) are all arranged on the cover body (6), and respectively correspond to the positions of the positive connection terminal row (23), the negative connection terminal row (33), the first positive output terminal and the second positive output terminal of the third connection copper bar (26), the other end of the fourth connection copper bar (28), the positive connection terminal of the heating circuit (4), the first negative output terminal, the second negative output terminal and the third negative output terminal of the ninth connection copper bar (36), and are used for protecting the connection terminal row.

10. The BDU controller according to claim 9, characterized in that: The shielding mechanism (8) comprises a plurality of covers (81) and a clamp (82), wherein the cover body (6) is provided with a plurality of windows (600), the plurality of windows (600) respectively corresponding to the positions of the positive terminal row (23), the negative terminal row (33), the first positive output end and the second positive output end of the third copper connection bar (26), the other end of the fourth copper connection bar (28), the positive connection end of the heating circuit (4), the first negative output end, the second negative output end and the third negative output end of the ninth copper connection bar (36), the plurality of covers (81) are hinged in each window (600), and the clamp (82) is arranged on the outside of the covers (81), and the covers (81) are clamped in the windows (600) via the clamp (82).

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