Integrated high-voltage control unit

Abstract

The utility model relates to the technical field of high-voltage control units, and discloses an integrated high-voltage control unit, which comprises a shell and a PCB (printed circuit board) fixed in the shell, the PCB is electrically connected with a plurality of components, and the components comprise light electrical parts directly welded on the PCB, and main fuses and contactors fixed on the shell and electrically connected with the PCB through copper bars. According to the high-voltage control unit, light electrical parts with light weight are borne by the PCB, main fuses and contactors with heavy weight are borne by the shell, electrical connection is guaranteed through the copper bars, integration is guaranteed, meanwhile, the weight on the PCB is reduced, and therefore the risk of deformation of the PCB is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to high pressure control unit technical field especially relates to an integrated high pressure control unit. BACKGROUND

[0002] In the traditional high pressure control unit, the electrical components are usually connected by wire harness, which results in complicated and disordered wiring, poor consistency of manual wiring and virtual connection, etc. Therefore, the integrated high pressure control unit is developed.

[0003] A positive electrode battery energy distribution unit without wire harness connection is disclosed in Chinese patent No. 202321163604.9, which includes an upper shell and a lower shell connected detachably, and a first accommodating space is formed between the upper shell and the lower shell. The PCB integrated component includes a PCB board and a plurality of terminals provided on the PCB board, and the terminals include bolted current terminals and plug-in current terminals. A plurality of electrical components are arranged in the first accommodating space and are directly connected to a bolted current terminal or a plug-in current terminal, respectively. The busbar assembly is arranged in the first accommodating space and includes a busbar and a high-voltage acquisition sheet fixedly connected to the busbar. The high-voltage acquisition sheet is directly connected to the plug-in current terminal.

[0004] In the above-mentioned scheme, the electrical components are fixed on the PCB board through bolted current terminals or plug-in current terminals. However, the main fuse and the contactor in the electrical components have a large weight, and are directly fixed on the PCB board, which may cause deformation of the PCB board and affect the circuit connection on the PCB board in severe cases. SUMMARY

[0005] The utility model discloses a kind of integrated high pressure control units for solving the shortcomings that the main fuse and the contactor in the electrical components have a large weight, and are directly fixed on the PCB board, which may cause deformation of the PCB board and affect the circuit connection on the PCB board in severe cases.

[0006] To solve the above technical problems, the utility model solves the problems by the following technical solutions:

[0007] An integrated high pressure control unit includes a shell and a PCB board fixed in the shell. A plurality of components are electrically connected to the PCB board. The components include lightweight electrical components directly welded on the PCB board, and a main fuse and a contactor fixed on the shell and electrically connected to the PCB board through a copper bar.

[0008] With the above scheme, for light electrical components with lighter weight, direct welding on the PCB board is adopted for fixation and electrical connection, and the welding connection is more firm and less likely to loosen in long-term use. For the main fuse and contactor with heavier weight, the shell is used for bearing, and the copper bar is used for electrical connection, so that integration is realized, and the weight on the PCB board is reduced, thereby reducing the risk of PCB board deformation.

[0009] Preferably, the main fuse and the contactor are detachably fixed on the shell.

[0010] With the above scheme, the main fuse and the contactor can be replaced conveniently.

[0011] Preferably, the shell is formed with a lap block for lapping the two ends of the main fuse, and the two ends of the main fuse are fixedly connected with the lap block through bolts and nuts.

[0012] With the above scheme, the lap block is integrally formed with the shell, and the two ends of the main fuse are respectively arranged on the two lap blocks, and the main fuse is supported by the lap blocks, and the main fuse is fixed on the lap blocks through the thread cooperation of the nuts and the bolts.

[0013] Preferably, the contactor is clamped on the shell, and the shell is formed with a bottom plate for arranging the contactor, and the contactor is fixedly connected with the bottom plate through a clasp and a clamping block.

[0014] With the above scheme, the bottom plate is integrally formed with the shell, the contactor is arranged on the bottom plate, the contactor is supported by the bottom plate, and the clamping block is buckled with the clasp to limit the longitudinal movement of the contactor.

[0015] Preferably, a positioning protrusion in interference abutment with the outer wall of the contactor is protruded on the inner wall of the shell.

[0016] With the above scheme, the positioning protrusion is in abutment with the outer wall of the contactor, and the contactor is clamped to limit the lateral movement of the contactor.

[0017] Preferably, a pre-positioning structure for positioning the welding position of the copper bar between the copper bar and the PCB board is arranged.

[0018] With the above scheme, the welding position of the copper bar is determined through the pre-positioning structure, and then welding is performed, so that the welding operation of the copper bar is more convenient and the position accuracy is higher.

[0019] Preferably, the pre-positioning structure comprises a limiting frame fixedly arranged on the PCB board and through which the copper bar passes, and at least two elastic plates elastically clamped on both sides of the copper bar when the copper bar passes through the limiting frame.

[0020] With the above scheme, one end of the copper bar is inserted into the limiting frame, the end of the copper bar extrudes the elastic plate in the limiting frame, the elastic plates on both sides of the copper bar deform away from each other to generate elastic force to clamp the copper bar, and the copper bar is positioned on the PCB under the clamping of the elastic plates on both sides without external force.

[0021] As preferred, the limiting frame is circumferentially spaced with a plurality of insertion ends fixed on the limiting frame and the other end is bent downward, which can be inserted into the PCB and welded with the PCB.

[0022] With the above scheme, the insertion end of the limiting frame is inserted into the PCB and welded, and the limiting frame is fixed on the PCB.

[0023] As preferred, the lightweight electrical component includes a pre-charge resistor, a pre-charge relay, a heating relay, a heating fuse, and a connector.

[0024] The utility model discloses a kind of integrated high-voltage control units, including PCB, lightweight electrical component, shell, copper bar and limiting frame, the lightweight electrical component is directly welded on the PCB, and the PCB is used as load-bearing;For main fuse and contactor of heavier weight, the shell is used as load-bearing, and then copper bar guarantees electrical connection, integrated, reduce the weight on PCB, thereby reduce the risk of PCB deformation. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a schematic diagram of an integrated high-voltage control unit in an embodiment;

[0026] Figure 2 It is a split of an integrated high-voltage control unit in an embodiment Figure 1 ;

[0027] Figure 3 It is an enlarged view of A in Figure 2 ;

[0028] Figure 4 It is a split of an integrated high-voltage control unit in an embodiment Figure 2 ;

[0029] Figure 5 It is an enlarged view of F in Figure 4 ;

[0030] Figure 6 It is a top view of an integrated high-voltage control unit in an embodiment;

[0031] Figure 7 It is a sectional view of B-B in Figure 6 ;

[0032] Figure 8 It is an enlarged view of C in Figure 7 ;

[0033] Figure 9 is Figure 7 an enlarged view of D in

[0034] Figure 10 is Figure 7 an enlarged view of E in

[0035] Figure 11 is a partial enlarged view of a copper bar not inserted into a pre-positioning structure in an integrated high-voltage control unit in an embodiment;

[0036] Figure 12 is a schematic view of a pre-positioning structure in an integrated high-voltage control unit in an embodiment.

[0037] The names of the parts referred to by the respective reference numerals in the above drawings are as follows: 1, upper shell; 2, lower shell; 3, PCB board; 4, pre-charge resistor; 5, pre-charge relay; 6, heating relay; 7, heating fuse; 8, connector; 9, main fuse; 10, first copper bar; 11, bent portion; 12, contactor; 13, second copper bar; 17, lapping block; 18, nut; 19, bolt; 20, limiting frame; 21, elastic plate; 22, bottom plate; 23, clamping block; 24, lead-in slope; 25, clasp; 26, mating slope; 27, positioning protrusion; 28, guide slope; 29, insertion end. DETAILED DESCRIPTION

[0038] The utility model will be described in further detail below in combination with the drawings and embodiments.

[0039] Embodiment

[0040] An integrated high-voltage control unit, with reference to Figures 1 to 12 , comprises a shell, the shell comprises a lower shell 2 with an opening upward and an upper shell 1 detachably connected to the lower shell 2 and capable of opening or closing the lower shell 2, the detachable connection of the two is prior art, not marked in the figure, and will not be described here.

[0041] The lower shell 2 is fixedly provided with a PCB board 3 at the bottom, and the PCB board 3 is welded and fixed and electrically connected with light electrical components, in the embodiment, the light electrical components comprise a pre-charge resistor 4, a pre-charge relay 5, a heating relay 6, a heating fuse 7 and a connector 8, and the light electrical components are prior art, which will not be described here.

[0042] A bottom plate 22 is integrally formed with the lower shell 2 above the PCB 3, and the contactor 12 is placed on the bottom plate 22. Since the bottom plate 22 is integrally formed with the lower shell 2, the lower shell 2 bears the weight of the contactor 12. Two clamping rings 25 are symmetrically arranged on the bottom plate 22 on both sides of the contactor 12. The contactor 12 is provided with two clamping blocks 23 on the two side walls close to the clamping rings 25. When the bottom of the contactor 12 is attached to the bottom plate 22, the clamping blocks 23 on both sides are clamped with the clamping rings 25 on both sides, thereby limiting the longitudinal movement of the contactor 12. The lower end surface of the clamping block 23 is provided with a guide slope 24 that gradually inclines away from the bottom plate 22 from the end close to the contactor 12 to the end away from the contactor 12. The upper end surface of the clamping ring 25 is provided with a matching slope 26 that gradually inclines towards the bottom plate 22 from the side away from the contactor 12 to the side close to the contactor 12. The inner wall of the lower shell 2 is provided with a positioning protrusion 27 that protrudes inward. When the clamping blocks 23 on the contactor 12 are clamped with the clamping rings 25, the positioning protrusion 27 is in interference abutment with the outer wall of the contactor 12, thereby limiting the transverse movement of the contactor 12. The upper end surface of the positioning protrusion 27 is provided with a guide slope 28 that facilitates the insertion of the contactor 12 into the lower shell 2. The guide slope 28 gradually inclines towards the bottom plate 22 from the side away from the contactor 12 to the side close to the contactor 12.

[0043] Two clamping blocks 17 are integrally injection molded with the lower shell 2 above the lightweight electrical component. The two ends of the main fuse 9 are located above the two clamping blocks 17, and the two clamping blocks 17 are respectively fixed with embedded nuts 18. In this embodiment, the nuts 18 are insert nuts. The bolts 19 pass through the end of the main fuse 9 and are screwed with the insert nuts 18 to fix the main fuse 9 on the clamping blocks 17. Since the main fuse 9 is fixed on the clamping blocks 17, and the clamping blocks 17 are integrally formed with the lower shell 2, the main fuse 9 is borne by the lower shell 2. The main fuse 9 is arranged above the lightweight electrical component, and the longitudinal space of the lower shell 2 can be fully utilized.

[0044] The main fuse 9 and the contactor 12 are electrically connected through copper bars and the PCB 3. A pre-positioning structure is arranged between the copper bars and the PCB 3. The pre-positioning structure includes a limiting frame 20 fixedly arranged on the PCB 3 for the copper bars to pass through, and an avoidance slot is formed in the PCB 3 for the copper bars to pass through. A resilient plate 21 is arranged on both sides of the copper bars in the limiting frame 20, one end of the resilient plate 21 is fixed in the limiting frame 20, and the other end is bent downward and suspended. When the copper bars pass through the limiting frame 20, the resilient plate 21 is elastically clamped on both sides of the copper bars. After the copper bars are pre-positioned, they are welded on the PCB 3 to realize fixation and electrical connection. The limiting frame 20 is rectangularly arranged, and a plug-in end 29 is arranged at each corner of the limiting frame 20, one end of the plug-in end 29 is fixed in the limiting frame 20, and the other end is bent downward. The plug-in end 29 can be inserted into the PCB 3 and welded with the PCB 3.

[0045] The copper bars include two first copper bars 10 fixed and electrically connected on the PCB 3 and electrically connected with two ends of the main fuse 9 respectively, and two second copper bars 13 fixed and electrically connected on the PCB 3 and electrically connected with the bottom of the contactor 12. The end of the first copper bar 10 away from the PCB 3 is horizontally bent to form a bent part 11 clamped between the nut 18 and the end of the main fuse 9 to realize electrical connection. The end of the second copper bar 13 away from the PCB 3 is located above the bottom plate 22 after passing through the bottom plate 22, and when the contactor 12 is limited on the bottom plate 22, the second copper bar 13 is electrically connected with the bottom of the contactor 12.

[0046] The PCB 3, the components, and the circuit connection relationship between the components and the PCB 3 are all prior art, and only the fixing position and the fixing method of each component are modified in the present scheme, and the circuit connection relationship is not improved, so the circuit connection relationship will not be described again.

[0047] The above is only the preferred embodiment of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments. Any technical scheme falling within the idea of the present application belongs to the protection scope of the present application. It should be noted that for ordinary skilled in the art, some improvements and decorations without departing from the principle of the present application are also considered as the protection scope of the present application.

Claims

1. An integrated high-voltage control unit comprising a housing and a PCB board (3) fixed in the housing, a plurality of components being electrically connected on the PCB board (3), characterized in that: The components include light electrical components directly welded on the PCB (3), and the main fuse (9) and the contactor (12) fixed on the shell and electrically connected with the PCB (3) through the copper bar.

2. The integrated high voltage control unit of claim 1, wherein: The main fuse (9) and the contactor (12) are detachably fixed on the shell.

3. The integrated high voltage control unit of claim 2, wherein: The shell is formed with a lap block (17) for lapping the two ends of the main fuse (9), and the two ends of the main fuse (9) are fixedly connected with the lap block (17) through the bolt (19) and the nut (18).

4. The integrated high voltage control unit of claim 2, wherein: The contactor (12) is clamped on the shell, and the shell is formed with a bottom plate (22) for supporting the contactor (12), and the contactor (12) is fixedly connected with the bottom plate (22) through the snap ring (25) and the clamping block (23).

5. The integrated high voltage control unit of claim 4, wherein: The inner wall of the shell is protruded with a positioning protrusion (27) in interference abutment with the outer wall of the contactor (12).

6. The integrated high voltage control unit of claim 1, wherein: The copper bar and the PCB (3) are provided with a pre-positioning structure for positioning the welding position of the copper bar.

7. The integrated high voltage control unit of claim 6, wherein: The pre-positioning structure includes a limiting frame (20) fixedly arranged on the PCB (3) for the copper bar to pass through, and at least two elastic plates (21) arranged in the limiting frame (20) and elastically clamped on both sides of the copper bar when the copper bar passes through the limiting frame (20).

8. The integrated high voltage control unit of claim 7, wherein: The limiting frame (20) is circumferentially provided with a plurality of insertion ends (29) fixed on one end of the limiting frame (20) and bent downward on the other end, which can be inserted into the PCB (3) and welded with the PCB (3).

9. The integrated high voltage control unit of claim 1, wherein: The light electrical components include a pre-charging resistor (4), a pre-charging relay (5), a heating relay (6), a heating fuse (7) and a connector (8).

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