Linear moving type switching battery series-parallel conversion switch

Abstract

The application discloses a battery series-parallel conversion switch of linear moving type switching. The battery series-parallel conversion switch of linear moving type switching comprises a shell assembly, a contact assembly, a transmission assembly and a driving assembly, a containing space is arranged in the shell assembly, a copper bar assembly is arranged in the containing space, the driving assembly is movably arranged in the containing space, the contact assembly and the transmission assembly are arranged in the containing space, and the contact assembly drives the driving assembly to move linearly in the containing space through the transmission assembly. The contact assembly is driven to move linearly in the containing space through the driving assembly, selective electric contact between the first contact plate and the second contact plate and different vertical ends of the copper bar assembly is realized, series connection position and parallel connection position are switched, the number of electronic components is reduced, internal space is saved, and cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of electrical connections, and in particular to a linear motion switching battery series-parallel transfer switch. Background Technology

[0002] As the new energy vehicle industry rapidly develops towards higher voltage and platform-based technologies, some models have been upgraded to an 800V voltage platform. However, there are still a large number of 400V voltage platform charging infrastructures on the market. In order to enable 800V platform vehicles to charge normally at 400V charging piles, it is usually necessary to install a series-parallel switching mechanism in the vehicle battery pack. This allows two 400V battery packs to output 800V in series to power the vehicle while driving, and to maintain a 400V input in parallel while charging to adapt to low-voltage charging piles.

[0003] Currently, most traditional battery packs use at least three relays, along with busbars and wiring harnesses, to form a switching circuit. The switching between series and parallel states is achieved by controlling the on / off combinations of different relays. This approach has the following drawbacks: First, the large number of electronic components such as relays, fuses, and wiring harnesses not only occupies a lot of space but also increases costs. Second, multiple relays need to be switched on and off according to a specific timing sequence, making the control logic complex and prone to malfunctions that could lead to short circuits. Third, after the coil power is cut off, the magnetic force of the relays disappears, and their contact states change accordingly, making it difficult to maintain the state before the coil power was cut off. Summary of the Invention

[0004] To address one or more of the aforementioned problems, the present invention provides a linearly moving switching battery series-parallel conversion switch.

[0005] According to one aspect of the present invention, a linear motion switching battery series-parallel transfer switch includes a housing assembly, a contact assembly, a transmission assembly, and a drive assembly.

[0006] The housing assembly has a receiving space, and a copper busbar assembly is installed in the receiving space. The drive assembly is movably installed in the receiving space. The contact assembly and the transmission assembly are both installed in the receiving space. The contact assembly drives the drive assembly to move linearly in the receiving space through the transmission assembly. The two ends of the drive assembly in the receiving space are connected in series and in parallel through the copper busbar assembly.

[0007] In some embodiments, the copper busbar assembly includes two first copper busbars and two second copper busbars mounted on the housing assembly. The second vertical ends and third vertical ends of the two second copper busbars are symmetrically arranged vertically within the receiving space. The first vertical ends and second vertical ends of the two first copper busbars are located on the same side, and the two first vertical ends are located between the two second vertical ends.

[0008] In some embodiments, the first transverse end of the first copper busbar penetrates one side of the housing assembly and extends to the outside of the housing assembly, and the second transverse end of the second copper busbar penetrates the other side of the housing assembly and extends to the outside of the housing assembly.

[0009] In some embodiments, the drive assembly includes an insulating frame disposed within a receiving space, with a first contact plate and a second contact plate respectively embedded on both sides of the insulating frame.

[0010] In parallel operation, the second contact plate is electrically connected to the two first vertical ends and the two first vertical ends.

[0011] In series configuration, the first contact plate is electrically connected to the two third vertical ends.

[0012] In some embodiments, four first springs are installed on the side of the second contact plate away from the first contact plate, and the four first springs are respectively matched with two first vertical ends and two third vertical ends. Two second springs are installed on the side of the first contact plate away from the second contact plate, and the two second springs are matched with two third vertical ends.

[0013] In some embodiments, the housing assembly includes a first half-shell and a second half-shell, with openings at the bottom of the first half-shell and the top of the second half-shell. The first half-shell and the second half-shell are fixedly connected by bolts, and the two openings form an accommodating space.

[0014] In some embodiments, at least two guide blocks are fixedly connected to the bottom surface of the insulating frame, and each guide block has a guide groove on its bottom surface. A guide rail that matches the guide groove is fixedly connected to the inner bottom wall of the second half-shell, and the guide block is slidably connected to the guide rail through the guide groove.

[0015] In some embodiments, the transmission assembly includes a rotary seat mounted on the second half-shell and at least one rack fixedly connected to an insulating frame. A drive shaft is rotatably connected to the rotary seat, a third gear is mounted in the middle of the drive shaft, and a second gear that matches the rack is also mounted on the drive shaft and meshes with the rack.

[0016] In some embodiments, the contact assembly includes a mounting bracket mounted on a first half-shell, a motor and a reduction gear are mounted inside the mounting bracket, a linkage shaft is rotatably connected to the mounting bracket, and the linkage shaft is driven to the output shaft of the motor through the reduction gear. A first gear is mounted on the linkage shaft, and the first gear meshes with a third gear.

[0017] In some embodiments, the reduction structure includes a drive shaft rotatably connected to a mounting bracket in the vertical direction and two worm gear sleeves. Two worm wheels are mounted on the drive shaft, and the two worm gear sleeves are respectively mounted on the output shaft and the linkage shaft of the motor, and the two worm gear sleeves mesh with the two worm wheels respectively.

[0018] The advantages of this linear motion switching battery series-parallel transfer switch are as follows: First, the drive component moves the contact assembly linearly within the accommodating space, enabling selective electrical contact between the first and second contact plates and different vertical ends of the copper busbar assembly, thereby switching between series and parallel positions. This reduces the number of electronic components, saving internal space and lowering costs. Second, the worm gear reduction structure and rack and pinion meshing drive the insulating frame to perform linear reciprocating motion, causing different contact plates to sequentially contact or disengage from the corresponding copper busbar ends, achieving series-parallel state switching. The control logic is simple, intuitive, and less prone to errors. Furthermore, the worm gear has self-locking properties, making it difficult for the series or parallel position to change, continuously maintaining the state before the coil power supply was cut off. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of a linear motion switching battery series-parallel conversion switch according to an embodiment of the present invention.

[0020] Figure 2 for Figure 1 The diagram shown is a three-dimensional schematic of the battery series-parallel conversion switch after the first half of the casing has been removed.

[0021] Figure 3 for Figure 2 The diagram shows a three-dimensional exploded view of the transmission assembly, drive assembly, and second half-shell.

[0022] Figure 4 for Figure 2 The diagram shows a three-dimensional exploded view of the transmission assembly, drive assembly, and second half-shell.

[0023] Figure 5 for Figure 2 The diagram shows the state of the battery series-parallel conversion switch in series mode.

[0024] Figure 6 for Figure 2 The diagram shows the structure of the copper busbar assembly.

[0025] Housing assembly 1, first half-shell 11, second half-shell 12, guide rail 121;

[0026] Copper busbar assembly 2, first copper busbar 21, first vertical end 211, first horizontal end 212, second copper busbar 22, second vertical end 221, third vertical end 222, second horizontal end 223;

[0027] Contact assembly 3, mounting bracket 31, motor 32, worm sleeve 33, drive shaft 34, worm wheel 35, linkage shaft 36, first gear 37;

[0028] Transmission assembly 4, rotating seat 41, drive shaft 42, second gear 43, rack 44, third gear 45;

[0029] Drive assembly 5, insulating frame 51, first contact plate 52, second contact plate 53, first spring 54, second spring 55, guide block 56, guide groove 57. Detailed Implementation

[0030] The invention will now be described in further detail with reference to the accompanying drawings. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0031] Figures 1 to 6 A linear motion switching battery series-parallel transfer switch according to an embodiment of the present invention is schematically shown. As shown, the device includes a housing assembly 1, a contact assembly 3, a transmission assembly 4, and a drive assembly 5.

[0032] The housing assembly 1 has a receiving space, and a copper busbar assembly 2 is provided in the receiving space. The drive assembly 5 is movably provided in the receiving space. The contact assembly 3 and the transmission assembly 4 are both provided in the receiving space. The contact assembly 3 drives the drive assembly 5 to move linearly in the receiving space through the transmission assembly 4. The two ends of the drive assembly 5 in the receiving space form a series position and a parallel position through the copper busbar assembly 2.

[0033] Preferably, the copper busbar assembly 2 includes two first copper busbars 21 and two second copper busbars 22 mounted on the housing assembly 1. The second vertical ends 221 and third vertical ends 222 of the two second copper busbars 22 are symmetrically arranged vertically within the receiving space. The first vertical ends 211 and second vertical ends 221 of the two first copper busbars 21 are located on the same side, and the two first vertical ends 211 are located between the two second vertical ends 221.

[0034] Furthermore, the first transverse end 212 of the first copper busbar 21 penetrates one side of the housing assembly 1 and extends to the outside of the housing assembly 1, and the second transverse end 223 of the second copper busbar 22 penetrates the other side of the housing assembly 1 and extends to the outside of the housing assembly 1.

[0035] The first copper busbar 21 and the second copper busbar 22 are led out from different sides of the housing assembly 1 to facilitate external wiring zone management and avoid wiring interference.

[0036] Preferably, the drive assembly 5 includes an insulating frame 51 disposed within the receiving space. A first contact plate 52 and a second contact plate 53 are respectively inlaid on both sides of the insulating frame 51. Both the first contact plate 52 and the second contact plate 53 are conductive metal plates, used to achieve electrical contact with the vertical end of the copper busbar assembly 2 at corresponding positions.

[0037] In the parallel state, the second contact plate 53 is electrically connected to the two first vertical ends 211 and the two first vertical ends 221. At this time, the insulating frame 51 drives the second contact plate 53 to move to the position of the two first vertical ends 211 and the two second vertical ends 221, so that the two first copper busbars 21 and the two second copper busbars 22 form a parallel conducting circuit through the second contact plate 53.

[0038] In the series connection state, the first contact plate 52 is electrically connected to the two third vertical ends 222. At this time, the insulating frame 51 drives the first contact plate 52 to move to the position where it simultaneously contacts the two third vertical ends 222, so that the two second copper busbars 22 form a series circuit through the first contact plate 52.

[0039] Furthermore, four first springs 54 are installed on the side of the second contact plate 53 away from the first contact plate 52. The four first springs 54 are respectively matched with two first vertical ends 211 and two first vertical ends 222. Two second springs 55 are installed on the side of the first contact plate 52 away from the second contact plate 53, and the two second springs 55 are matched with two third vertical ends 222.

[0040] Both the first reed 54 and the second reed 55 are made of elastic conductive material, which generates elastic deformation upon contact to provide stable contact pressure, and can effectively compensate for manufacturing and assembly tolerances, and maintain stable contact pressure during long-term use.

[0041] Preferably, the outer casing assembly 1 includes a first half-shell 11 and a second half-shell 12. The bottom of the first half-shell 11 and the top of the second half-shell 12 are both open. The first half-shell 11 and the second half-shell 12 are fixedly connected by bolts, and the two openings form an accommodating space.

[0042] Both the first half-shell 11 and the second half-shell 12 are made of insulating material. When they are joined together, they form a closed receiving space to house and protect the internal components. They are detachably connected by bolts for easy maintenance later.

[0043] Furthermore, at least two guide blocks 56 are fixedly connected to the bottom surface of the insulating frame 51, and each guide block 56 has a guide groove 57 on its bottom surface. The inner bottom wall of the second half-shell 12 is fixedly connected to a guide rail 121 that matches the guide groove 57, and the guide block 56 is slidably connected to the guide rail 121 through the guide groove 57.

[0044] The direction of the guide groove 57 and the guide rail 121 is parallel to the direction of movement of the insulating frame 51, so that the insulating frame 51 only moves in a straight line along the extension direction of the guide rail 121, which effectively improves the stability of the movement of the insulating frame 51.

[0045] Preferably, the transmission assembly 4 includes a rotating seat 41 mounted on the second half-shell 12 and at least one rack 44 fixedly connected to the insulating frame 51. A drive shaft 42 is rotatably connected to the rotating seat 41. A third gear 45 is mounted in the middle of the drive shaft 42. A second gear 43 that matches the rack 44 is also mounted on the drive shaft 42, and the second gear 43 meshes with the rack 44.

[0046] The meshing of the second gear 43 with the rack 44 is used to convert the rotational motion of the drive shaft 42 into the linear motion of the insulating frame 51.

[0047] Furthermore, the contact assembly 3 includes a mounting bracket 31 mounted on the first half-shell 11. The mounting bracket 31 houses a motor 32 and a reduction gear structure. A linkage shaft 36 is rotatably connected to the mounting bracket 31, and the linkage shaft 36 is connected to the output shaft of the motor 32 via the reduction gear structure. A first gear 37 is mounted on the linkage shaft 36, and the first gear 37 meshes with a third gear 45.

[0048] The output shaft of motor 32 drives the linkage shaft 36 to rotate through the reduction structure. The linkage shaft 36 drives the drive shaft 42 to rotate through the meshing of the first gear 37 and the third gear 45, which in turn drives the second gear 43 and the rack 44 to move the insulating frame 51.

[0049] Preferably, the deceleration structure includes a drive shaft 34 rotatably connected to the mounting bracket 31 in the vertical direction and two worm sleeves 33. Two worm wheels 35 are mounted on the drive shaft 34, and the two worm sleeves 33 are respectively mounted on the output shaft and the linkage shaft 36 of the motor 32, and the two worm sleeves 33 mesh with the two worm wheels 35 respectively.

[0050] The output shaft of motor 32 drives a corresponding worm wheel 35 to rotate through the worm sleeve 33 on it. The worm wheel 35 drives another worm wheel 35 to rotate synchronously through the transmission shaft 34. The other worm wheel 35 then drives the worm sleeve 33 on the linkage shaft 36, thus forming a two-stage worm gear reduction transmission.

[0051] The working principle of this switch:

[0052] When it is necessary to switch between parallel and series states, the motor 32 is started, causing the output shaft of the motor 32 to rotate. This causes the worm sleeve 33 to mesh and drive the first worm wheel 35 to rotate. The worm wheel 35 drives the second worm wheel 35 to rotate synchronously via the transmission shaft 34. The second worm wheel 35 then drives the worm sleeve 33 on the linkage shaft 36, causing the linkage shaft 36 to output torque at a reduced speed. At this time, the first gear 37 on the linkage shaft 36 rotates accordingly and drives the drive shaft 42 to rotate through meshing with the third gear 45.

[0053] The second gear 43 on the drive shaft 42 meshes with the rack 44, thereby causing the insulating frame 51 to move linearly along the guide rail 121.

[0054] During the movement, the four first springs 54 on the second contact plate 53 gradually detach from the two first vertical ends 211 and the two second vertical ends 221, cutting off the parallel circuit. Then, the two second springs 55 on the first contact plate 52 gradually approach each other and finally press against the two third vertical ends 222 to form a series circuit.

[0055] Alternatively, during the movement, the two second springs 55 on the first contact plate 52 gradually detach from the two third vertical ends 222, cutting off the series circuit, and then the four first springs 54 on the second contact plate 53 gradually approach the two first vertical ends 211 and the two second vertical ends 221 to form a parallel circuit.

[0056] The above descriptions are merely some embodiments of the present invention. Those skilled in the art can make various modifications and improvements without departing from the inventive concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. A linear motion switching battery series-parallel transfer switch, characterized in that, It includes a housing assembly (1), a contact assembly (3), a transmission assembly (4), and a drive assembly (5); The housing assembly (1) has a receiving space, and a copper busbar assembly (2) is provided in the receiving space. The driving assembly (5) is movably disposed in the receiving space. The contact assembly (3) and the transmission assembly (4) are both disposed in the receiving space. The contact assembly (3) drives the driving assembly (5) to move in a straight line in the receiving space through the transmission assembly (4). The two ends of the driving assembly (5) in the receiving space form a series position and a parallel position through the copper busbar assembly (2).

2. The linear motion switching battery series-parallel transfer switch according to claim 1, characterized in that, The copper busbar assembly (2) includes two first copper busbars (21) and two second copper busbars (22) mounted on the housing assembly (1). The second vertical ends (221) and third vertical ends (222) of the two second copper busbars (22) are symmetrically arranged in the accommodating space along the vertical direction. The first vertical ends (211) and the second vertical ends (221) of the two first copper busbars (21) are located on the same side, and the two first vertical ends (211) are located between the two second vertical ends (221).

3. A linear motion switching battery series-parallel transfer switch according to claim 2, characterized in that, The first transverse end (212) of the first copper busbar (21) penetrates one side of the housing assembly (1) and extends to the outside of the housing assembly (1), and the second transverse end (223) of the second copper busbar (22) penetrates the other side of the housing assembly (1) and extends to the outside of the housing assembly (1).

4. A linear motion switching battery series-parallel transfer switch according to claim 1, characterized in that, The drive assembly (5) includes an insulating frame (51) disposed within the receiving space, and a first contact plate (52) and a second contact plate (53) are respectively inlaid on both sides of the insulating frame (51). In parallel operation, the second contact plate (53) is electrically connected to the two first vertical ends (211) and the two first vertical ends (211); In series configuration, the first contact plate (52) is electrically connected to the two third vertical ends (222).

5. A linear motion switching battery series-parallel transfer switch according to claim 4, characterized in that, The second contact plate (53) has four first springs (54) installed on the side away from the first contact plate (52). The four first springs (54) are matched with two first vertical ends (211) and two first vertical ends (211) respectively. The first contact plate (52) has two second springs (55) installed on the side away from the second contact plate (53), and the two second springs (55) are matched with two third vertical ends (222).

6. A linear motion switching battery series-parallel transfer switch according to claim 4, characterized in that, The outer shell assembly (1) includes a first half-shell (11) and a second half-shell (12). The bottom of the first half-shell (11) and the top of the second half-shell (12) are both open. The first half-shell (11) and the second half-shell (12) are fixedly connected by bolts, and the two openings form an accommodating space.

7. A linear motion switching battery series-parallel transfer switch according to claim 6, characterized in that, At least two guide blocks (56) are fixedly connected to the bottom surface of the insulating frame (51). Each guide block (56) has a guide groove (57) on its bottom surface. The inner bottom wall of the second half-shell (12) is fixedly connected to a guide rail (121) that matches the guide groove (57). The guide block (56) is slidably connected to the guide rail (121) through the guide groove (57).

8. A linear motion switching battery series-parallel transfer switch according to claim 6, characterized in that, The transmission assembly (4) includes a rotating seat (41) mounted on the second half-shell (12) and at least one rack (44) fixedly connected to the insulating frame (51). A drive shaft (42) is rotatably connected to the rotating seat (41). A third gear (45) is mounted in the middle of the drive shaft (42). A second gear (43) that matches the rack (44) is also mounted on the drive shaft (42), and the second gear (43) meshes with the rack (44).

9. A linear motion switching battery series-parallel transfer switch according to claim 8, characterized in that, The contact assembly (3) includes a mounting bracket (31) mounted on the first half-shell (11). A motor (32) and a reduction gear are installed inside the mounting bracket (31). A linkage shaft (36) is rotatably connected to the mounting bracket (31), and the linkage shaft (36) is connected to the output shaft of the motor (32) through the reduction gear. A first gear (37) is mounted on the linkage shaft (36), and the first gear (37) meshes with a third gear (45).

10. A linear motion switching battery series-parallel transfer switch according to claim 9, characterized in that, The deceleration structure includes a drive shaft (34) rotatably connected to the mounting bracket (31) in the vertical direction and two worm sleeves (33). Two worm wheels (35) are mounted on the drive shaft (34). The two worm sleeves (33) are respectively mounted on the output shaft and the linkage shaft (36) of the motor (32), and the two worm sleeves (33) mesh with the two worm wheels (35) respectively.

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