A power distribution box and rectifier cabinet

Abstract

The utility model relates to the technical field of power distribution, and specifically to a power distribution box and a rectifier cabinet, wherein the power distribution box includes a plurality of output conductive bars, a plurality of power switches, and a plurality of intermediate conductive bars, wherein the output conductive bars are used to be electrically connected to power modules in a one-to-one correspondence, the power switches include adjacent switches and jumper switches, the intermediate conductive bars include adjacent conductive bars and jumper conductive bars, the adjacent switches and adjacent conductive bars are used to cooperate with connecting a plurality of the output conductive bars in series in sequence to form a ring-shaped electrical connection structure, and the jumper switches and jumper conductive bars are used to cooperate with electrically connecting every two non-adjacent output conductive bars in the ring-shaped electrical connection structure. The power distribution box provided by the utility model can realize flexible power distribution, and is low in cost, and has a compact structure, small size, convenient stocking, easy maintenance, and labor-saving. In addition, it has a high degree of modularization and can be adapted to rectifier cabinets of various powers.

Description

Technical Field

[0001] The utility model relates to the technical field of power distribution, in particular to a power distribution box and a rectifier cabinet. Background Art

[0002] As the number of electric vehicles increases, the demand for high-power charging equipment in the charging pile field is getting higher and higher, especially for split-type charging piles used in charging stations and other places, whose power is also getting higher and higher. At present, split-type high-power charging piles basically use PDU component solutions or ring relay solutions to achieve power distribution.

[0003] Figure 1 The topological structure of the PDU component solution in the prior art is shown. Each PDU component is connected to each power module, and a large number of relays are used to realize the "multi-input and one-output" current direction. Each PDU component can call any power module to achieve flexible power distribution, but its cost is high. For example, to realize full matrix power distribution in a 480kW rectifier cabinet, 12 PDU components are required, with a total of more than 100 relays.

[0004] Figure 2 The topological structure of the ring relay solution in the prior art is shown. Adjacent power modules are connected by a group of relays to form a "hand-in-hand" ring structure, which has low cost. For example, the same 480kW rectifier cabinet corresponds to 12 power modules and parking spaces, and only 12 groups of 24 relays are required; however, under this solution, the charging gun can only call the adjacent power modules on the left and right, and the power distribution is not flexible. An example is given as follows: when there are only 3 cars charging in the 12 parking spaces, if the 3 cars are parked in the adjacent parking spaces 1, 2, and 3 respectively, the car in the middle parking space 2 can only obtain a charging power of 40kW, and the other 2 cars can call the power module on the other side to charge at a full power of 80kW. Only when the car in parking space 2 drives to parking spaces 4-12 can the 3 cars be charged at maximum power.

[0005] From the perspective of cost and allocation flexibility, the PDU component solution is very flexible but extremely expensive; the ring relay solution is not flexible in power allocation but has extremely low cost. Therefore, it is necessary to propose a power allocation solution that can achieve more flexible power allocation at the lowest possible cost. Utility Model Content

[0006] In order to solve the technical problem that the power distribution scheme in the prior art cannot have both low cost and flexible distribution, the utility model proposes a power distribution box with a star chain topology structure. Although its cost is slightly higher than the ring relay scheme, it is still much lower than the PDU component scheme, and its distribution flexibility can reach 90% of the PDU component scheme. In addition, this scheme inherits the advantage of the PDU component scheme of convenient stocking, solves the disadvantage of the ring relay scheme of large layout space requirement, and is superior to the PDU component scheme in terms of maintenance.

[0007] The technical solution of this utility model:

[0008] A power distribution box, comprising:

[0009] A plurality of output conductive bars, a plurality of power switches and a plurality of intermediate conductive bars;

[0010] in,

[0011] The output conductive bars are used for electrical connection with the power modules in a one-to-one correspondence;

[0012] The power switch includes an adjacent switch and a jumper switch, the intermediate conductive bar includes an adjacent conductive bar and a jumper conductive bar, the adjacent switch and the adjacent conductive bar are used to cooperate in connecting a plurality of the output conductive bars in series in sequence to form a ring-shaped electrical connection structure, and the jumper switch and the jumper conductive bar are used to cooperate in electrically connecting every two non-adjacent output conductive bars in the ring-shaped electrical connection structure.

[0013] Furthermore, the plurality of output conductive bars are arranged longitudinally, and the plurality of intermediate conductive bars are arranged transversely; at intersections where electrical connection is not required, the output conductive bars and / or intermediate conductive bars are bent back to back in the height direction; and the plurality of power switches are respectively arranged between the output conductive bars that require corresponding electrical connection.

[0014] Further, there are six output conductive bars, which are respectively the first output conductive bar, the second output conductive bar, the third output conductive bar, the fourth output conductive bar, the fifth output conductive bar and the sixth output conductive bar arranged in sequence; there are six adjacent switches, which are arranged in multiple rows with a spacing therebetween in the horizontal direction, which are respectively the first adjacent switch, the second adjacent switch, the third adjacent switch, the fourth adjacent switch, the fifth adjacent switch and the sixth adjacent switch arranged in sequence; there are three cross-over switches, which are respectively the first cross-over switch, the second cross-over switch and the third cross-over switch arranged in sequence, the first cross-over switch is used to electrically connect the first output conductive bar and the fourth output conductive bar, the second cross-over switch is used to electrically connect the second output conductive bar and the fifth output conductive bar, and the third cross-over switch is used to electrically connect the third output conductive bar and the sixth output conductive bar;

[0015] The first jumper switch is arranged in the same row as the fourth adjacent switch, and the third jumper switch is arranged in the same row as the second adjacent switch.

[0016] Further, the jumper conductive bar matched with the first jumper switch and the adjacent conductive bar matched with the fourth adjacent switch are integrated, and the jumper conductive bar matched with the third jumper switch and the adjacent conductive bar matched with the second adjacent switch are integrated.

[0017] Furthermore, the sixth adjacent switch, the fifth adjacent switch, and the third jumper switch are concentrated on one side in the longitudinal direction to leave a reserved space on the other side in the longitudinal direction, and the power distribution box also includes a fan, which is arranged in the reserved space.

[0018] Further, the power distribution box includes a mounting substrate, the fan and the power switch are mounted on the mounting substrate, the power switch is a relay, the output conductive bar and the middle conductive bar are aluminum bars, which are respectively mounted and connected to corresponding relays, and the bottoms of the second adjacent switch, the fifth adjacent switch, the second jumper switch and the third jumper switch are provided with gaskets.

[0019] Furthermore, corresponding to the multiple output conductive bars, the mounting substrate is also provided with a plurality of insulators for support, and the insulators are arranged close to the protruding ends of the corresponding output conductive bars; the power distribution box also includes an epoxy board, and the epoxy board includes an upper epoxy board and a lower epoxy board, which are used to fix the protruding ends of each output conductive bar, and the epoxy board is also provided with heat dissipation holes.

[0020] Furthermore, a control board and a connector are also installed on the mounting substrate, the control board is arranged inside the front side of the power distribution box, the control board includes a power supply port and an IO port for electrically connecting to the plurality of power switches respectively, and the connector is arranged outside the rear side of the power distribution box for electrically connecting to an external mainboard;

[0021] A front cover is also installed on the installation base plate, and a front panel is hingedly provided on the front cover plate at a position corresponding to the control panel. An air hole is also opened on the front cover plate facing the fan. Handle reinforcement sheet metals are also provided on the left and right sides of the front cover plate, and a handle is installed on each of the two handle reinforcement sheet metals; a top cover is also installed on the installation base plate, and the top cover is a PC board.

[0022] Another aspect of the utility model provides a rectifier cabinet, comprising a power distribution box as described in any one of the above items, wherein the rectifier cabinet comprises at least one group of the power distribution boxes, each group of power distribution boxes has two power distribution boxes, which are respectively used for a positive circuit and a negative circuit.

[0023] Furthermore, the rectifier cabinet includes two groups of the power distribution boxes, and the two power distribution boxes for the positive circuit / negative circuit in the two groups are electrically connected one by one through at least one output conductive bar respectively.

[0024] After adopting the above technical solution, the power distribution box and rectifier cabinet provided by the utility model have the following beneficial effects compared with the prior art:

[0025] 1. Compared with the existing ring relay solution, the power distribution box of the utility model only adds a few relays, and the cost is still relatively low, but the flexibility of power distribution is greatly improved.

[0026] 2. Compared with the existing power distribution solutions, the power distribution box of the utility model is compact, simple to assemble, convenient to stock, easy to maintain, and saves work time.

[0027] 3. The power distribution box of the utility model has a high degree of modularity and can be adapted to split rectifier cabinets of various powers.

[0028] 4. The power distribution box of the utility model makes the arrangement of the components more compact, the space utilization rate is high, the overall size is small, and the modular assembly is convenient through the reasonable arrangement design of the internal components. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of the topological structure of a PDU component allocation solution in the prior art;

[0030] Figure 2 A schematic diagram of the topological structure of a ring relay distribution solution in the prior art;

[0031] Figure 3 It is a schematic diagram of the overall structure of the power distribution box of the first embodiment;

[0032] Figure 4 It is a schematic diagram of the internal structure of the power distribution box of the first embodiment at a first viewing angle;

[0033] Figure 5 It is a schematic diagram of the internal structure of the power distribution box of the first embodiment at a second viewing angle;

[0034] Figure 6 It is a three-dimensional diagram of the arrangement of the output conductive bar, the power switch and the middle conductive bar in the power distribution box of the first embodiment;

[0035] Figure 7 It is a front view of the arrangement of the output conductive bar, the power switch and the middle conductive bar in the power distribution box of the first embodiment;

[0036] Figure 8A schematic diagram of a power distribution topology structure of a power distribution box according to Embodiment 1;

[0037] Fig. 9 This is a schematic diagram of the power distribution topology of the rectifier cabinet of Example 4.

[0038] in,

[0039] Output conductive bar 1, first output conductive bar 11, second output conductive bar 12, third output conductive bar 13, fourth output conductive bar 14, fifth output conductive bar 15, sixth output conductive bar 16;

[0040] Power switch 2, adjacent switch 21, first adjacent switch 211, second adjacent switch 212, third adjacent switch 213, fourth adjacent switch 214, fifth adjacent switch 215, sixth adjacent switch 216, jumper switch 22, first jumper switch 221, second jumper switch 222, third jumper switch 223;

[0041] The middle conductive row 3, the adjacent conductive row 31, the first adjacent conductive row 311, the second adjacent conductive row 312, the third adjacent conductive row 313, the fourth adjacent conductive row 314, the fifth adjacent conductive row 315, the sixth adjacent conductive row 316, the bridging conductive row 32, the first bridging conductive row 321, the second bridging conductive row 322, and the third bridging conductive row 323;

[0042] Install the base plate 4, the fan 41, the fan bracket 411; the gasket 42; the insulator 43; the epoxy board 44, the upper epoxy board 441, the lower epoxy board 442, the heat dissipation hole 443; the control board 45, the control board bracket 451, the connector 46, the front cover 47, the front panel 471, the air hole 472, the handle reinforcement sheet metal 473, the handle 474, and the top cover 48. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0044] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0045] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0046] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0047] Embodiment 1:

[0048] like Figure 3-7 As shown, this embodiment provides a power distribution box, which includes multiple output conductive bars 1, multiple power switches 2 and multiple intermediate conductive bars 3, wherein the multiple output conductive bars 1 are used to be electrically connected to multiple power modules in a one-to-one correspondence, and are electrically connected to multiple charging terminals in a one-to-one correspondence, and the charging terminals may be, but are not limited to, charging guns. The multiple output conductive bars 1 are connected through multiple power switches 2 and multiple intermediate conductive bars 3 to form a star-chain power distribution structure, so that the power of multiple power modules can be distributed.

[0049] Specifically, the plurality of power switches 2 include adjacent switches 21 and jumper switches 22, and the plurality of intermediate conductive bars 3 include adjacent conductive bars 31 and jumper conductive bars 32. The adjacent switches 21 and adjacent conductive bars 31 are used to cooperate in connecting the plurality of output conductive bars 1 in series in sequence to form a ring-shaped electrical connection structure, and the jumper switches 22 and jumper conductive bars 32 are used to cooperate in electrically connecting every two non-adjacent output conductive bars 1 in the ring-shaped electrical connection structure, thereby forming a star-chain power distribution structure.

[0050] In order to realize the electrical connection of non-adjacent output conductive bars 1, the number of the output conductive bars 1 is at least four. Assuming that the number of the output conductive bars 1 is n, n is an integer greater than or equal to four, and is preferably an even number, the adjacent switch 21 is a power switch 2 used to electrically connect two adjacent output conductive bars 1 in the annular electrical connection structure, and the number of the adjacent switch 21 is n. The adjacent conductive bar 31 is used to cooperate with the adjacent switch 21 to electrically connect two adjacent output conductive bars 1, and the number of the adjacent conductive bar 31 is also preferably n. Of course, if the power switch 2 used between two output conductive bars 1 can achieve the required electrical distance, the adjacent conductive bar 31 between the two output conductive bars 1 can be omitted, that is, the number of the adjacent conductive bar 31 is at least one; the jumper switch 22 is a power switch 2 used to electrically connect two non-adjacent output conductive bars 1 in the annular electrical connection structure, and the number of the adjacent conductive bar 31 is n / 2. The jumper conductive bar 32 is used to cooperate with the jumper switch 22 to electrically connect two non-adjacent output conductive bars 1, and the number of the adjacent conductive bar 31 is also n / 2.

[0051] This embodiment provides a specific implementation method. The number of the output conductive bars 1 is six, the number of the adjacent switches 21 is six, and the number of the crossover switches 22 is three, that is, the output conductive bars 1 are six, the number of the adjacent switches 21 is six, and the number of the crossover switches 22 is three. Figure 8 In the star-chain power distribution topology shown, the six output conductive bars 1 are respectively connected to a power module and a charging gun, and the six output conductive bars 1 are connected to form a ring-shaped electrical connection structure through the adjacent switches 21. The three jumper switches 22 are connected in a diagonal cross shape to three groups of non-adjacent output conductive bars 1. Of course, in other embodiments, the jumper switches 22 can also be connected in other forms, such as Figure 8 A jumper switch 22 jumps the power module M4 and the power module M6, a jumper switch 22 jumps the power module M1 and the power module M3, and a jumper switch 22 jumps the power module M2 and the power module M5.

[0052] Compared with the PDU component solution and the ring relay solution in the prior art (both of which include six power modules), the power distribution box of this embodiment has the following advantages:

[0053] When only one electric car is being charged, all nine power switches 2 in the power distribution box of this embodiment are closed, and all six power modules can transmit power to the electric car, so the electric car can be charged at full power. In this case, the PDU component solution and the ring relay solution can also achieve full power charging of an electric car, with the same effect;

[0054] When two electric vehicles are charging, no matter which parking spaces and charging guns are selected by each electric vehicle, the power distribution box of this embodiment can charge both electric vehicles at full power. The example is as follows: Electric vehicle No. 1 starts charging gun 1 in parking space No. 1, and electric vehicle No. 2 starts charging gun 2 in parking space No. 2. At this time, the two jumper switches 22 are closed, so that electric vehicle No. 1 can call power module M1, power module M2, power module M4 and power module M6, and electric vehicle No. 2 can call power module M1, power module M2, power module M3 and power module M5. Each electric vehicle can call at least two power modules to charge at full power. In this case, the PDU component solution and the ring relay solution can also achieve full-power charging of two electric vehicles, with the same effect;

[0055] When there are three electric vehicles charging, no matter which parking spaces and charging guns are selected by each electric vehicle, the power distribution box of this embodiment can also charge the three electric vehicles at full power. The example is as follows: Electric vehicle No. 1 starts charging gun 1 in parking space No. 1, electric vehicle No. 2 starts charging gun 2 in parking space No. 2, and electric vehicle No. 3 starts charging gun 3 in parking space No. 3. At this time, the three jumper switches 22 are closed, so that electric vehicle No. 1 can call power module M1, power module M2, power module M4 and power module M6, electric vehicle No. 2 can call power module M1, power module M2, power module M3 and power module M5, and electric vehicle No. 3 can call power module M2, power module M3, power module M4 and power module M6. Each electric vehicle can call at least two power modules to charge at full power. In this case, the PDU component solution can also achieve full-power charging of two electric vehicles, but the ring relay solution can no longer achieve this effect;

[0056] When there are four electric vehicles charging, all three power distribution schemes can only ensure that two electric vehicles are charged at full power. However, the advantage of the power distribution box and PDU component scheme of this embodiment is that if any car leaves, the other three cars can switch to full power charging, which cannot be achieved with the ring relay scheme.

[0057] When there are five electric vehicles charging, all three power distribution schemes can only guarantee that one electric vehicle is charged at full power, but the PDU component scheme can define which of the five vehicles is charged at full power. In the scheme of this embodiment, there must be two vehicles that cannot obtain energy from multiple modules together due to environmental conditions, and in the ring relay scheme, there must be three vehicles that cannot obtain energy from multiple modules together due to environmental conditions.

[0058] When there are six electric vehicles charging, each electric vehicle is powered by a power module, and the three power distribution schemes have the same effect and there is no difference.

[0059] It can be seen that the star-chain power distribution solution provided by this embodiment has only a few more jumper switches 22 than the ring relay solution in terms of cost, and its cost is slightly higher than the ring relay solution, but still much lower than the PDU solution; in terms of effect, it can achieve about 90% of the flexible distribution effect of the PDU component solution. In other words, this embodiment greatly improves the flexibility of power distribution under the premise of keeping the cost as low as possible.

[0060] For the specific structure of the power distribution box, such as Figure 6-7 As shown, in this embodiment, the output conductive bars 1 are arranged longitudinally, and the intermediate conductive bars 3 are arranged transversely. At the intersection of the output conductive bars 1 and the intermediate conductive bars 3, if electrical connection is required, they are overlapped and fastened by bolts. If electrical connection is not required, the output conductive bars 1 and / or the intermediate conductive bars 3 are bent back to back in the height direction to ensure the insulation distance. Multiple power switches 2 are respectively arranged between the output conductive bars 1 that need corresponding electrical connection.

[0061] The six output conductive bars 1 of the present embodiment are respectively a first output conductive bar 11, a second output conductive bar 12, a third output conductive bar 13, a fourth output conductive bar 14, a fifth output conductive bar 15 and a sixth output conductive bar 16 which are arranged in sequence from left to right;

[0062] Furthermore, the six adjacent switches 21 of the present embodiment are respectively a first adjacent switch 211, a second adjacent switch 212, a third adjacent switch 213, a fourth adjacent switch 214, a fifth adjacent switch 215 and a sixth adjacent switch 216 which are arranged in sequence. The first adjacent switch 211 and the first adjacent conductive bar 311 are arranged between the first output conductive bar 11 and the second output conductive bar 12 to be electrically connected. The second adjacent switch 212 and the second adjacent conductive bar 312 are arranged between the second output conductive bar 12 and the third output conductive bar 13 to be electrically connected. The third adjacent switch 213 and the third adjacent conductive bar 313 are arranged between the third output conductive bar 13 and the fourth output conductive bar 14 to be electrically connected. The fourth adjacent conductive bar 14 and the fourth adjacent conductive bar 314 are arranged between the fourth output conductive bar 14 and the fifth output conductive bar 15 for electrical connection, the fifth adjacent switch 215 and the fifth adjacent conductive bar 315 are arranged between the fifth output conductive bar 15 and the sixth output conductive bar 16 for electrical connection, and the sixth adjacent switch 216 and the sixth adjacent conductive bar 316 are arranged between the sixth output conductive bar 16 and the first output conductive bar 11 for electrical connection; and the six adjacent switches 21 are arranged in multiple rows with intervals in the horizontal direction, that is, the power switches 2 in each row need to be arranged at least one apart, and the rest are arranged in other rows, so that the output conductive bars 1 can be arranged more compactly, reducing the horizontal space occupied by the power switches 2 and reducing the horizontal size of the power distribution box.

[0063] Furthermore, the three jumper switches 22 of the present embodiment are respectively a first jumper switch 221, a second jumper switch 222 and a third jumper switch 223 which are arranged in sequence. The first jumper switch 221 is used to cooperate with the first jumper conductive bar 321 to electrically connect the first output conductive bar 11 and the fourth output conductive bar 14. The second jumper switch 222 is used to cooperate with the second jumper conductive bar 322 to electrically connect the second output conductive bar 12 and the fifth output conductive bar 15. The third jumper switch 223 is used to cooperate with the third jumper conductive bar 323 to electrically connect the third output conductive bar 13 and the sixth output conductive bar 16.

[0064] Among them, the first jumper switch 221 is arranged in the same line as the fourth adjacent switch 214, and the third jumper switch 223 is arranged in the same line as the second adjacent switch 212. This can reduce the number of rows of arrangement, make the arrangement more compact, reduce the longitudinal occupied space, and reduce the longitudinal size of the power distribution box.

[0065] Furthermore, in this case, the first jumper conductive bar 321 matched with the first jumper switch 221 and the fourth adjacent conductive bar 314 matched with the fourth adjacent switch 214 can be integrated, that is, the two form an aluminum bar; the third jumper conductive bar 323 matched with the third jumper switch 223 and the second adjacent conductive bar 312 matched with the second adjacent switch 212 can be integrated, that is, the two form an aluminum bar. In this way, the number of aluminum bars can be reduced and the complexity of the overlapping arrangement of the aluminum bars can be reduced.

[0066] like Figure 7 As shown, the sixth adjacent switch 216 and the sixth adjacent conductive bar 316 in this embodiment are located in the first row, the first adjacent switch 211, the first adjacent conductive bar 311, the third adjacent switch 213, the third adjacent conductive bar 313, the fifth adjacent switch 215 and the fifth adjacent conductive bar 315 are approximately located in the second row, the second adjacent switch 212, the second adjacent conductive bar 312, the third jumper switch 223 and the third jumper conductive bar 323 are located in the third row, the second jumper switch 222 and the second jumper conductive bar 322 are located in the fourth row, and the first jumper switch 221, the first jumper conductive bar 321, the fourth adjacent switch 214 and the fourth adjacent conductive bar 314 are located in the fifth row. In this way, this embodiment concentrates the sixth adjacent switch 216, the fifth adjacent switch 215, and the third jumper switch 223 on one longitudinal side, so that a reserved space can be left on the right side of the other longitudinal side. A fan 41 is also provided in the power distribution box of this embodiment. The fan 41 is arranged in the reserved space to reduce its additional occupied space, and the overall structure is reasonably and compactly arranged.

[0067] The power distribution box of this embodiment includes a mounting substrate 4, on which a fan bracket 411 is mounted, and the fan 41 is mounted on the fan bracket 411. Each power switch 2 is preferably a relay, which is also mounted on the mounting substrate 4. Each output conductive bar 1 and the middle conductive bar 3 are respectively mounted and connected to the corresponding relay, and each output conductive bar 1 and the middle conductive bar 3 are preferably aluminum bars. Among them, a gasket 42 is also provided between the bottom of the second adjacent switch 212, the fifth adjacent switch 215, the second jumper switch 222 and the third jumper switch 223 and the mounting substrate 4. The thickness of the gasket 42 is the thickness of one middle conductive bar 3, which is used to compensate for the height difference caused by the overlap.

[0068] Corresponding to the multiple output conductive bars 1, a plurality of insulators 43 for support are also provided on the mounting substrate 4, and each insulator 43 is arranged close to the protruding end of the corresponding output conductive bar 1 to prevent the output conductive bar 1 from tilting. The rear end of the power distribution box is also provided with an epoxy plate 44, which includes an upper epoxy plate 441 and a lower epoxy plate 442, and is used to cooperate with the protruding end of each output conductive bar 1. When installing six output conductive bars 1, the upper epoxy plate 441 needs to be removed first. After the installation is completed, the upper epoxy plate 441 is reinstalled to clamp each output conductive bar 1. In addition, heat dissipation holes 443 are provided on the two epoxy plates 44 for heat dissipation.

[0069] A control board 45 is also mounted on the mounting substrate 4. The control board 45 is arranged inside the front side of the power distribution box. Specifically, a control board bracket 451 is mounted on the front side of the mounting substrate 4. The control board 45 is mounted on the control board bracket 451. The control board 45 is provided with eighteen IO ports corresponding to the control lines of the aforementioned nine relays. The control board 45 is also provided with a power supply port for external power supply to the control board 45. A connector 46 is also mounted on the mounting substrate 4. The connector 46 is arranged outside the rear side of the power distribution box and is used to electrically connect the external main board to realize power supply and communication between the external main board and the internal control board 45. The power distribution box can be directly inserted and installed in the rectifier cabinet. The connector 46 is electrically connected to the terminals of the rectifier cabinet by plugging or the like.

[0070] In this embodiment, a front cover plate 47 is also installed on the mounting substrate 4. A front panel 471 is hingedly provided on the front cover plate 47 at the position corresponding to the control panel 45. The control panel 45 can be dialed and the program burned by rotating the front panel 471 counterclockwise. The control panel 45 can be quickly replaced after the front cover plate 47 is removed. A honeycomb-shaped air hole 472 is also provided on the front cover plate 47 at the position directly opposite the fan 41. The fan 41 takes in air from the air hole 472 and discharges air from the heat dissipation holes 443 on the epoxy board 44. A handle reinforcement sheet metal 473 is also provided on the left and right sides of the front cover plate 47. A handle 474 is installed on each of the two handle reinforcement sheet metals 473 to facilitate the transportation and installation of the power distribution box. In addition, a top cover 48 is also installed on the mounting substrate 4. The top cover 48 is a PC board. After the installation of the components in the box is completed, the top cover 48 is installed to achieve the sealing of the power distribution box.

[0071] From the above content, it can be seen that the power distribution box provided in this embodiment can realize flexible power distribution with low cost, and its structure is compact, its size is small, it is easy to stock, easy to maintain, and saves work time. In addition, it has a high degree of modularity and can be adapted to rectifier cabinets of various powers.

[0072] Embodiment 2:

[0073] The utility model provides a rectifier cabinet, which comprises at least one group of the above-mentioned power distribution boxes, each group of power distribution boxes has two, which are respectively used for a positive circuit and a negative circuit.

[0074] Specifically, the power distribution of the rectifier cabinet of this embodiment adopts the following strategy: first, separate the positive and negative current loops, use a power distribution box for the positive loop, and use a power distribution box for the negative loop. The two power distribution boxes have the same structure, and only distinguish the positive and negative currents through the external wiring copper bar. Then, corresponding to a group of two positive and negative power distribution boxes, six power modules are equipped as a group, and the output conductive bars 1 of the two power distribution boxes are respectively connected to each power module, that is, one power module is electrically connected to one output conductive bar 1 in each of the two power distribution boxes, so as to realize the current transmission of the positive and negative electrodes. In each power distribution box, nine power switches 2 and thirteen intermediate conductive bars 3 are overlapped with six output conductive bars 1 to realize the connection between power module M1 and power module M2, power module M2 and power module M3, power module M3 and power module M4, power module M4 and power module M5, power module M5 and power module M6, power module M6 and power module M1, power module M1 and power module M4, power module M2 and power module M5, power module M3 and power module M6, that is, six power modules form a ring, and the diagonals in the ring are connected in a cross shape to form a star chain structure. If three cars are parked in parking spaces 1, 2, and 3 respectively again, under the traditional ring relay solution, parking space 2 can only call one power module, but under the power distribution strategy of this embodiment, parking space 2 can expand power through the power switch 2 between power module M2 and power module M5, and electric vehicle charging is no longer restricted.

[0075] Embodiment three:

[0076] The rectifier cabinet of this embodiment includes two groups of the aforementioned power distribution boxes, each group of power distribution boxes has two, which are used for the positive circuit and the negative circuit respectively, that is, a total of four power distribution boxes are included. Corresponding to the two groups of four power distribution boxes, there are two groups of twelve power modules in total, and one group of power modules is connected to one group of power distribution boxes. During installation, the four star-chain power distribution boxes can be directly pushed into the rectifier cabinet after offline assembly, and then the external wiring copper busbar is installed. The upper part of the wiring copper busbar is connected to the output line of the power module, and the lower part of the wiring copper busbar is connected to the terminal gun line through the DC output line.

[0077] In terms of assembly and stocking, among the three power distribution schemes, the ring relay scheme is laid flat in the DC output area of ​​the cabinet. Each time the rectifier cabinet is assembled, the relay mounting plate needs to be disassembled and the relays and copper bars need to be installed one by one on site. It is not only inconvenient to stock, but also the material storage is the most messy. In the PDU component scheme, although the PDU itself is convenient to stock and install, the PDU is integrated in the sheet metal cabinet, which is huge and difficult to take. In addition, this scheme cannot be installed and stocked in advance. Each assembly requires the production line to first remove the PDU installation sheet metal, install the copper bar and insulating bakelite, and then snap the PDU on one by one. In the scheme of this embodiment, the power distribution box is small in size and easy to install, which saves the workers' assembly time. Moreover, the power distribution box is formed into a universal module, which can be adapted to rectifier cabinets of various powers. When the power demand of the rectifier cabinet increases, it is only necessary to increase the number of groups of the corresponding power distribution boxes. This makes stocking more convenient. The production line can put the star chain power distribution box on the assembly line for assembly and unified storage, and take it to the rectifier cabinet assembly area for installation as needed. It can be seen that the Starlink power allocation solution of this embodiment is superior to the other two solutions in terms of assembly and stocking.

[0078] In terms of maintenance, in the power distribution box solution of this embodiment, when power distribution fails, the operation and maintenance personnel only need to rotate the front panel 471 of the power distribution box counterclockwise to connect to the internal control board 45 to read data. If the internal relay fails, remove the screws between the star-chain power distribution box and the external wiring copper busbar, separate the male and female heads of the connector 46, and then pull the power distribution box out of the rectifier cabinet, and then open the top cover 48 to replace the problematic relay. After the maintenance is completed, reinstall the distribution box to restore the power supply of the rectifier cabinet; if there is a problem with the control board 45 itself, the front cover 47 can be directly removed and the control board 45 can be replaced to save maintenance time. As for the PDU component solution, once the PDU fails, the modules and the board will affect each other, making it difficult to dismantle and repair, and can only be replaced as a whole or returned to the factory for repair. Although the maintenance difficulty of the ring relay solution is lower than that of the PDU solution, its convenience is still weaker than the star-chain power distribution box solution integrated into a box body.

[0079] Embodiment 4:

[0080] The rectifier cabinet described in the third embodiment includes two groups of four power distribution boxes, which can distribute 360 / 480kW of power to twelve terminals for charging twelve parking spaces. Fig. 9 As shown, the rectifier cabinet of this embodiment also includes two groups of power distribution boxes. The two power distribution boxes for the positive circuit / negative circuit in the two groups are electrically connected one by one through at least one output conductive bar 1 respectively to realize the supercharging function.

[0081] Exemplarily, taking two power distribution boxes of the forward circuit as an example, the output conductive bar 1 connected to the power module M4 in the first power distribution box is electrically connected to the output conductive bar 1 connected to the power module M12 in the second power distribution box, and then electrically connected to a charging terminal, i.e., a super charging gun. The super charging gun occupies two power modules, and can call multiple power modules in the first power distribution box, and can also call multiple power modules in the second power distribution box. Furthermore, the output conductive bar 1 connected to the power module M3 in the first power distribution box can also be electrically connected to the output conductive bar 1 connected to the power module M7 in the second power distribution box, and then electrically connected to another super charging gun. In this way, power can be distributed to ten terminals for charging ten parking spaces, two of which have super charging functions. Of course, in other embodiments, the number of super charges can be set as needed.

[0082] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A power distribution box, characterized in that: include: A plurality of output conductive bars (1), a plurality of power switches (2) and a plurality of intermediate conductive bars (3); in, The output conductive bars (1) are used for electrical connection with the power modules in a one-to-one correspondence; The power switch (2) comprises an adjacent switch (21) and a jumper switch (22); the intermediate conductive bar (3) comprises an adjacent conductive bar (31) and a jumper conductive bar (32); the adjacent switch (21) and the adjacent conductive bar (31) are used to cooperate in sequentially connecting a plurality of the output conductive bars (1) in series to form a ring-shaped electrical connection structure; the jumper switch (22) and the jumper conductive bar (32) are used to cooperate in electrically connecting every two non-adjacent output conductive bars (1) in the ring-shaped electrical connection structure.

2. The power distribution box according to claim 1, characterized in that: The plurality of output conductive bars (1) are arranged longitudinally, and the plurality of intermediate conductive bars (3) are arranged transversely; at intersections where electrical connection is not required, the output conductive bars (1) and / or the intermediate conductive bars (3) are bent in opposite directions in the height direction; and the plurality of power switches (2) are respectively arranged between the output conductive bars (1) that require corresponding electrical connection.

3. The power distribution box according to claim 2, characterized in that: The number of the output conductive bars (1) is six, which are respectively a first output conductive bar (11), a second output conductive bar (12), a third output conductive bar (13), a fourth output conductive bar (14), a fifth output conductive bar (15) and a sixth output conductive bar (16) which are arranged in sequence; the number of the adjacent switches (21) is six, and the six adjacent switches (21) are arranged in a plurality of rows at intervals in the transverse direction, which are respectively a first adjacent switch (211), a second adjacent switch (212), a third adjacent switch (213), a fourth adjacent switch (214), a fifth adjacent switch (215) and a sixth adjacent switch (216) which are arranged in sequence. The jumper switch (216) is provided in three numbers, namely a first jumper switch (221), a second jumper switch (222) and a third jumper switch (223) which are arranged in sequence, the first jumper switch (221) being used to electrically connect the first output conductive bar (11) and the fourth output conductive bar (14), the second jumper switch (222) being used to electrically connect the second output conductive bar (12) and the fifth output conductive bar (15), and the third jumper switch (223) being used to electrically connect the third output conductive bar (13) and the sixth output conductive bar (16); The first jumper switch (221) is arranged in the same row as the fourth adjacent switch (214), and the third jumper switch (223) is arranged in the same row as the second adjacent switch (212).

4. The power distribution box according to claim 3, characterized in that: The jumper conductive bar (32) matched with the first jumper switch (221) and the adjacent conductive bar (31) matched with the fourth adjacent switch (214) are integrated, and the jumper conductive bar (32) matched with the third jumper switch (223) and the adjacent conductive bar (31) matched with the second adjacent switch (212) are integrated.

5. The power distribution box according to claim 4, characterized in that: The sixth adjacent switch (216), the fifth adjacent switch (215), and the third jumper switch (223) are concentrated on one side in the longitudinal direction to leave a reserved space on the other side in the longitudinal direction. The power distribution box also includes a fan (41), and the fan (41) is arranged in the reserved space.

6. The power distribution box according to claim 5, characterized in that: The power distribution box comprises a mounting substrate (4), the fan (41) and the power switch (2) are mounted on the mounting substrate (4), the power switch (2) is a relay, the output conductive bar (1) and the intermediate conductive bar (3) are aluminum bars, which are respectively mounted and connected to corresponding relays, and gaskets (42) are provided at the bottoms of the second adjacent switch (212), the fifth adjacent switch (215), the second jumper switch (222) and the third jumper switch (223).

7. The power distribution box according to claim 6, characterized in that: Corresponding to the plurality of output conductive bars (1), the mounting substrate (4) is also provided with a plurality of insulators (43) for supporting, and the insulators (43) are arranged close to the protruding ends of the corresponding output conductive bars (1); the power distribution box also includes an epoxy board (44), and the epoxy board (44) includes an upper epoxy board (441) and a lower epoxy board (442), and is used to fix the protruding ends of the output conductive bars (1); the epoxy board (44) is also provided with heat dissipation holes (443).

8. The power distribution box according to claim 7, characterized in that: A control board (45) and a connector (46) are also mounted on the mounting substrate (4); the control board (45) is arranged inside the front side of the power distribution box, the control board (45) comprises a power supply port and an IO port for respectively electrically connecting to the plurality of power switches (2); the connector (46) is arranged outside the rear side of the power distribution box and is used for electrically connecting to an external mainboard; A front cover (47) is also installed on the installation base plate (4), and a front panel (471) is hingedly provided on the front cover (47) at a position corresponding to the control panel (45). An air hole (472) is also opened on the front cover (47) facing the fan (41). Handle reinforcement sheet metals (473) are also provided on the left and right sides of the front cover (47), and a handle (474) is installed on each of the two handle reinforcement sheet metals (473). A top cover (48) is also installed on the installation base plate (4), and the top cover (48) is a PC board.

9. A rectifier cabinet, characterized in that: It comprises a power distribution box as described in any one of claims 1 to 8, wherein the rectifier cabinet comprises at least one group of the power distribution boxes, each group of power distribution boxes has two power distribution boxes, which are used for a positive circuit and a negative circuit respectively.

10. The rectifier cabinet according to claim 9, characterized in that: The rectifier cabinet comprises two groups of power distribution boxes, and the two power distribution boxes for the positive circuit / negative circuit in the two groups are electrically connected one by one through at least one output conductive bar (1) respectively.

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