Engineering machinery vehicle-mounted charger

Abstract

The utility model discloses a vehicle-mounted charger for engineering machinery, which comprises a cabinet body, a charging module, a leakage protection short-circuiter cabinet, a power supply module, a high-voltage branching cabinet and a vehicle-mounted controller, a placement rack is arranged on one side in the cabinet body, the charging module is connected to the placement rack in a drawable manner, one side of the leakage protection short-circuiter cabinet is hinged to the side edge of the placement rack, and the other side of the leakage protection short-circuiter cabinet is hinged to the vehicle-mounted controller. The power module is installed at the bottom in the cabinet body and located below the electric leakage short-circuiter cabinet, the high-voltage branching cabinet is installed on the side, away from the charging module, in the cabinet body, and the vehicle-mounted controller is installed on the upper portion in the cabinet body. Through the above layout mode, the interior of the charger can be subjected to high-voltage and low-voltage partitioning, so that the safety of equipment during working is improved. In addition, the rotatable leakage protection short-circuiter cabinet can give way to the charging module placed in the placing frame, so that maintenance of the charging module is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of chargers, in particular to a vehicle-mounted charger for engineering machinery. Background Art

[0002] With the development of new energy technologies, new energy electric products have become a trend in the construction machinery industry. To reduce vehicle battery capacity and thus vehicle costs, while meeting the demands of pure electric construction, addressing the short battery life of pure battery operations, and accommodating the need for rapid on-site movement, construction machinery tends to utilize both onboard chargers, external power supplies, and small-capacity power batteries.

[0003] Existing on-board chargers often have complex components, making subsequent maintenance more difficult. Therefore, improving the maintainability of on-board chargers is a technical problem currently in need of solution by those skilled in the art. Utility Model Content

[0004] The purpose of the utility model is to provide a vehicle-mounted charger for engineering machinery, which can effectively improve the convenience of its maintenance.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A vehicle-mounted charger for engineering machinery comprises: a cabinet, a charging module, a leakage protection circuit breaker cabinet, a power module, a high-voltage distribution cabinet, and an on-board controller. A placement rack is provided on one side of the interior of the cabinet, the charging module is retractably connected to the placement rack, one side of the leakage protection circuit breaker cabinet is hinged to the side of the placement rack, the power module is mounted at the bottom of the cabinet and is located below the leakage circuit breaker cabinet, the high-voltage distribution cabinet is mounted on a side of the cabinet away from the charging module, and the on-board controller is mounted on the upper part of the cabinet.

[0007] In some embodiments, the placement rack includes four vertical poles, multiple horizontal poles and multiple longitudinal poles, the two ends of the multiple horizontal poles are connected to the two vertical poles located at the front, half of the longitudinal poles have two ends connected to the two vertical poles located on one side, and the other half of the longitudinal poles have two ends connected to the two vertical poles located on the other side to form a multi-layer placement space, an angle steel is provided on the inner side of each longitudinal pole, and each layer of the placement space is used to place one charging module, and one side of the leakage protection circuit breaker cabinet is hinged to one of the vertical poles located at the front.

[0008] In some embodiments, a mounting base is provided at the bottom of the charging module, and four limit rods are provided on the mounting base. Two limit rods located on different sides of the charging module and corresponding to each other are connected by a pressure rod. The pressure rod is used to press the charging module tightly on the mounting base, and the mounting base is placed on the angle steel.

[0009] In some embodiments, a rubber pad is provided between the mounting base and the charging module.

[0010] In some embodiments, a rubber shock absorber is provided at the bottom of the cabinet.

[0011] In some embodiments, an incoming line interface is provided at the bottom of the high-voltage distribution cabinet, and an outgoing line interface is provided at the side of the high-voltage distribution cabinet.

[0012] In some embodiments, the high-voltage distribution cabinet is provided with a first wiring copper bar, a second wiring copper bar, a third wiring copper bar, a fourth wiring copper bar, a main positive DC contactor, a first connecting copper bar, a second connecting copper bar, a third connecting copper bar, a fourth connecting copper bar, a fuse and a main negative DC contactor. The first wiring copper bar, the second wiring copper bar, the third wiring copper bar and the fourth wiring copper bar are connected in the high-voltage distribution cabinet through insulators and are spaced apart from top to bottom. The first wiring copper bar and the second wiring copper bar are used to connect to the high-voltage line of the motor controller; the two ends of the main positive DC contactor are respectively connected to the first connecting copper bar and the second connecting copper bar, the second connecting copper bar is connected to the fourth connecting copper bar through the fuse, and the first connecting copper bar is connected to the first connecting copper bar; the two ends of the main negative DC contactor are respectively connected to the third connecting copper bar and the fourth connecting copper bar, the fourth connecting copper bar is connected to the third connecting copper bar, and the third connecting copper bar is connected to the second connecting copper bar.

[0013] In some embodiments, a high-voltage line inlet, a high-voltage line outlet, and a ground line connection port are provided on the side of the leakage protection circuit breaker cabinet.

[0014] In some embodiments, the interior of the leakage protection circuit breaker cabinet is provided with a leakage protection circuit breaker, a first long connecting copper bar, a second long connecting copper bar, a third long connecting copper bar, a first short connecting copper bar, a second short connecting copper bar, a third short connecting copper bar, a first branch copper bar, a second branch copper bar and a third branch copper bar. The leakage protection circuit breaker is connected to the first long connecting copper bar, the second long connecting copper bar and the third long connecting copper bar. The first long connecting copper bar, the first short connecting copper bar and the first branch copper bar are connected in sequence. The second long connecting copper bar, the second short connecting copper bar and the second branch copper bar are connected in sequence. The third long connecting copper bar, the third short connecting copper bar and the third branch copper bar are connected in sequence.

[0015] In some embodiments, the first long connecting copper bar, the second long connecting copper bar, and the third long connecting copper bar are all bent structures.

[0016] Compared with the existing technology, the above technical solution has at least the following advantages:

[0017] The utility model provides an on-board charger for engineering machinery. When the charging module needs to be maintained, the leakage protection short-circuit breaker cabinet can be rotated outward to open it first, and then the charging module can be pulled out of the placement rack. After the charging module is pushed into the placement rack, the leakage protection short-circuit breaker cabinet can be rotated inward to close it. Through the improved layout, the interior of the charger can be divided into high-voltage and low-voltage zones. On the one hand, it can prevent high voltage from affecting low-voltage control communications and problems with high-voltage lines. On the other hand, it can prevent high-voltage lines from being connected to low-voltage areas, causing high voltage to be connected to low voltage, resulting in burnout and other malfunctions in low-voltage equipment. In addition, the rotatable leakage protection short-circuit breaker cabinet can make way for the charging module placed in the placement rack, thereby facilitating maintenance of the charging module. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0019] Figure 1 A schematic diagram of the external structure of a vehicle-mounted charger for engineering machinery provided in a specific embodiment of the present utility model;

[0020] Figure 2 A schematic diagram of the internal structure of a vehicle-mounted charger for engineering machinery provided in a specific embodiment of the utility model;

[0021] Figure 3 A schematic structural diagram of a cabinet of a vehicle-mounted charger for engineering machinery provided by a specific embodiment of the present utility model;

[0022] Figure 4 A schematic diagram of the three-dimensional structure of a charging module of a vehicle-mounted charger for engineering machinery provided by a specific embodiment of the utility model;

[0023] Figure 5 This is a schematic diagram of the main structure of a charging module of a vehicle-mounted charger for engineering machinery provided by a specific embodiment of the utility model;

[0024] Figure 6A schematic diagram of the structure of a leakage protection short-circuit breaker cabinet of an on-board charger for engineering machinery provided by a specific embodiment of the present utility model when it is open and closed;

[0025] Figure 7 A schematic structural diagram of a leakage protection circuit breaker cabinet of an on-board charger for engineering machinery provided by a specific embodiment of the present utility model when in an open state;

[0026] Figure 8 A schematic structural diagram of a high-voltage distribution cabinet for a vehicle-mounted charger for engineering machinery provided in a specific embodiment of the present utility model;

[0027] Figure 9 A schematic diagram of the external structure of a leakage protection short-circuit breaker cabinet for an on-board charger of an engineering machinery provided by a specific embodiment of the utility model;

[0028] Figure 10 The present invention is a structural diagram of a leakage protection circuit breaker cabinet for an on-board charger of an engineering machinery provided in a specific embodiment of the present invention.

[0029] The reference numerals are as follows:

[0030] 1-Rubber shock absorber, 2-Mounting sign, 3-Lifting ring, 4-Cabinet, 5-High voltage distribution cabinet, 6-Onboard controller, 7-Charging module, 8-Leakage protection circuit breaker cabinet, 9-Power module, 10-Protection board, 11-Vertical pole, 12-Horizontal bar, 13-Vertical bar, 14-Hinge, 15-Mounting bracket, 16-Mounting base plate, 17-Pressure bar, 18-Limiting bar, 19-Rubber pad, 20-First connection copper bar, 21-Second connection copper bar, 22-Third connection copper bar, 23-Fourth connection copper bar, 24-First connection copper bar, 25-Second connection copper bar, 26-Third connection copper bar, 27-Fourth connection copper bar Connecting copper busbar, 28-main positive DC contactor, 29-main negative DC contactor, 30-fuse, 31-incoming line interface, 32-outgoing line interface, 33-pre-charging resistor, 34-DC contactor, 35-high-voltage incoming line interface, 36-high-voltage outgoing line interface, 37-ground wire interface, 38-acrylic plate, 39-leakage protection circuit breaker, 40-first long connecting copper busbar, 41-second long connecting copper busbar, 42-third long connecting copper busbar, 43-first short connecting copper busbar, 44-second short connecting copper busbar, 45-third short connecting copper busbar, 46-first branch copper busbar, 47-second branch copper busbar, 48-third branch copper busbar. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] Please refer to Figures 1 to 10 The embodiment of the present invention provides an on-board charger for construction machinery, comprising: a cabinet 4, a charging module 7, a leakage protection circuit breaker cabinet 8, a power module 9, a high-voltage distribution cabinet 5 and an on-board controller 6, wherein the cabinet 4 comprises a rectangular frame structure and a protection plate 10 arranged on the outside of the rectangular frame structure, wherein the front of the cabinet 4 is provided with an openable and closable cabinet door, on which a button installation sign 2 is provided, and the installation sign 2 is provided with an emergency stop switch of the charging module 7, a main emergency stop switch of the charger, and a start-stop warning light. In order to facilitate installation, a hanging ring 3 can be provided at each of the four corners of the top of the cabinet 4. A placement rack is provided on one side of the interior of the cabinet body 4, and the charging module 7 can be connected to the placement rack in a pull-out manner. One side of the leakage protection circuit breaker cabinet 8 is hinged to the side of the placement rack, for example, it can be connected through a hinge 14. When the charging module 7 needs to be maintained, the leakage protection circuit breaker cabinet 8 can be rotated outward to open it first, and then the charging module 7 can be pulled out of the placement rack. After the charging module 7 is pushed into the placement rack, the leakage protection circuit breaker cabinet 8 can be rotated inward to close it, that is, the leakage protection circuit breaker cabinet 8 can be used as an inspection door of the placement rack. The power module 9 is installed at the bottom of the cabinet 4 and is located below the leakage circuit breaker cabinet. The power module 9 is preferably a DC-DC power module 9. The high-voltage distribution cabinet 5 is installed on the side of the cabinet 4 away from the charging module 7. For example, the high-voltage distribution cabinet 5 is installed on the left side of the cabinet 4, and the placement rack is located on the right side of the cabinet 4. The vehicle-mounted controller 6 is installed in the upper part of the cabinet 4. For example, the vehicle-mounted controller 6 is installed in the upper part of the space between the high-voltage distribution cabinet 5 and the placement rack, which can be fixed to the upper area of ​​the cabinet 4 by an auxiliary mounting plate. Through the above layout, the interior of the charger can be divided into high-voltage and low-voltage zones. On the one hand, it can prevent high voltage from affecting low-voltage control communication and avoid problems with high-voltage lines. On the other hand, it can prevent high-voltage lines from crossing into low-voltage areas, causing high voltage to be connected to low voltage, resulting in burnout and other faults in low-voltage equipment. In addition, the rotatable leakage protection circuit breaker cabinet 8 can make way for the charging module 7 placed in the placement rack, thereby facilitating the maintenance of the charging module 7.

[0033] In some embodiments, the placement rack is preferably a frame structure, including four vertical poles 11, multiple horizontal poles 12 and multiple longitudinal poles 13. The four vertical poles 11 are vertically fixed in the cabinet body 4. The two ends of the multiple horizontal poles 12 are connected to the two vertical poles 11 located at the front. The two ends of half of the longitudinal poles 13 are connected to the two vertical poles 11 located on one side, and the two ends of the other half of the longitudinal poles 13 are connected to the two vertical poles 11 located on the other side to form a multi-layer placement space. An angle steel is provided on the inner side of each longitudinal pole 13. Each layer of placement space is used to place a charging module 7. One side of the leakage protection circuit breaker cabinet 8 is hinged to a vertical pole 11 located at the front. The placement rack with a frame structure can facilitate the installation of the charging module 7.

[0034] In some embodiments, a mounting base plate 16 is provided at the bottom of the charging module 7, and four limiting rods 18 are provided on the mounting base plate 16. Two limiting rods 18 located on different sides of the charging module 7 and corresponding to each other are connected by a pressure rod 17. The pressure rod 17 is used to press the charging module 7 onto the mounting base plate 16, and the mounting base plate 16 is placed on the angle steel. Furthermore, a mounting bracket 15 is provided at the front end of the charging module 7. The mounting bracket 15 is preferably a Z-shaped plate structure bent at a right angle. One end of the Z-shaped plate is connected to the limiting rod 18, and the other end is connected to the side of the charging module 7 to improve the connection stability of the charging module 7. In order to improve the installation stability of the charging module 7, the mounting base plate 16 can be fixed to the angle steel by bolts. When maintenance is required, the bolts can be removed first, and then the charging module 7 can be pulled out of the placement rack. Furthermore, a rubber pad 19 is provided between the mounting base plate 16 and the charging module 7, which can provide a certain shock absorption effect. In addition, a rubber shock absorber 1 is provided at the bottom of the cabinet 4 , which can provide a certain shock-absorbing effect on the cabinet 4 .

[0035] In some embodiments, the high-voltage distribution cabinet 5 can be supported by a thin plate, specifically fixed to the cabinet body 4 by bolts. A line inlet 31 is provided at the bottom of the high-voltage distribution cabinet 5 to reduce the risk of water ingress into the cabinet body 5 and provide some protection for the high-voltage components within it. A line outlet 32 ​​is provided on the side of the high-voltage distribution cabinet 5. A pre-charge resistor 33 and a DC contactor 34 are also provided on the top of the high-voltage distribution cabinet 5. The on-board charger provided by the present invention can be used on large-scale engineering machinery with a power of 150kW. Engineering machinery typically operates in a harsh environment. In addition to the risk of water ingress to the equipment within the cabinet body 4 during rainy and snowy weather, daily cleaning poses certain safety hazards to the high-voltage components. The present invention designs the on-board charger as a standalone product and provides a protective plate 10 on the outside of the cabinet body 4 to provide some protection against mud and water. By inletting the high-voltage line at the bottom of the cabinet and outleting the high-voltage line at the side of the cabinet, the high-voltage line is connected to the waterproof connector at a perpendicular angle to the high-voltage distribution cabinet 5, reducing the risk of liquid entering the cabinet body 5.

[0036] In some embodiments, the high-voltage branch cabinet 5 is provided with a first copper bus 20, a second copper bus 21, a third copper bus 22, a fourth copper bus 23, a main positive DC contactor 28, a first copper bus 24, a second copper bus 25, a third copper bus 26, a fourth copper bus 27, a fuse 30 and a main negative DC contactor 29. The first copper bus 20, the second copper bus 21, the third copper bus 22 and the fourth copper bus 23 are connected to the high-voltage branch cabinet 5 through insulators and are spaced from top to bottom. Other copper buses are also installed in the high-voltage branch cabinet 5 through insulators to connect with the high-voltage branch cabinet 5. The distribution cabinet 5 maintains an appropriate creepage distance. The first and second copper busbars 20 and 21 are used to connect to the high-voltage lines of the motor controller. The two ends of the main positive DC contactor 28 are connected to the first and second copper busbars 24 and 25, respectively. The second copper busbar 25 is connected to the fourth copper busbar 23 through a fuse 30, and the first copper busbar 24 is connected to the first copper busbar 20. The two ends of the main negative DC contactor 29 are connected to the third copper busbar 26 and the fourth copper busbar 23, respectively. The fourth copper busbar 27 is connected to the third copper busbar 22, and the third copper busbar 26 is connected to the second copper busbar 21. The four output high-voltage circuits from the charging module 7 and the three main positive and negative high-voltage circuits from the battery high-voltage box converge on the first copper busbar 20, the second copper busbar 21, the third copper busbar 22, and the fourth copper busbar 23. The copper busbars then branch out into nine high-voltage DC output lines, which are routed through the bottom of the high-voltage distribution cabinet 5 to the power battery, motor controller, onboard controller 6, and power module 9.

[0037] In some embodiments, the side of the leakage protection circuit breaker cabinet 8 is provided with a high-voltage line inlet 35, a high-voltage line outlet 36, and a ground wire connection port 37 to reduce the risk of water ingress. The interior of the leakage protection circuit breaker cabinet 8 is provided with a leakage protection circuit breaker 39, a first long copper busbar 40, a second long copper busbar 41, a third long copper busbar 42, a first short copper busbar 43, a second short copper busbar 44, a third short copper busbar 45, a first branch copper busbar 46, a second branch copper busbar 47, and a third branch copper busbar 48. The leakage protection circuit breaker 39 is connected to the first long copper busbar 40, the second long copper busbar 41, and the third long copper busbar 42. The first long copper busbar 40, the first short copper busbar 43, and the first branch copper busbar 46 are connected in sequence. The second long copper busbar 41, the second short copper busbar 44, and the second branch copper busbar 47 are connected in sequence. The third long copper busbar 42, the third short copper busbar 45, and the third branch copper busbar 48 are connected in sequence. An acrylic plate 38 is provided on the leakage protection short circuit breaker cabinet 8 to isolate the switch of the leakage protection short circuit breaker 39 from the copper bars to prevent accidental contact with the copper bars when the switch is turned on. The first long connecting copper bar 40, the second long connecting copper bar 41, and the third long connecting copper bar 42 all have a bent structure, such as a U-shaped structure. The bent structure can fully utilize the space within the leakage protection short circuit breaker cabinet 8. The three-phase power line from the entire machine is divided into four high-voltage wiring harnesses from one path through the leakage protection short circuit breaker 39, and the high-voltage wiring harness is output to the connection terminals of the four charging modules 7 through each branch copper bar. In addition, in the leakage protection short circuit breaker cabinet 8, the copper bars are connected by insulators to maintain a reasonable creepage distance with the leakage protection short circuit breaker cabinet 8.

[0038] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0039] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0040] The above describes in detail the on-board charger for construction machinery provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above examples is only intended to help understand the core concept of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A vehicle-mounted charger for construction machinery, characterized in that: include: A cabinet, a charging module, a leakage protection circuit breaker cabinet, a power module, a high-voltage distribution cabinet and an on-board controller. A placement rack is provided on one side of the cabinet. The charging module can be pulled out and connected to the placement rack. One side of the leakage protection circuit breaker cabinet is hinged to the side of the placement rack. The power module is installed at the bottom of the cabinet and is located below the leakage protection circuit breaker cabinet. The high-voltage distribution cabinet is installed on the side of the cabinet away from the charging module. The on-board controller is installed on the upper part of the cabinet.

2. The engineering machinery vehicle-mounted charger according to claim 1, characterized in that: The placement rack includes four vertical poles, multiple horizontal poles and multiple longitudinal poles. The two ends of the multiple horizontal poles are connected to the two vertical poles located at the front, the two ends of half of the longitudinal poles are connected to the two vertical poles located on one side, and the two ends of the other half of the longitudinal poles are connected to the two vertical poles located on the other side to form a multi-layer placement space. Angle steel is provided on the inner side of each longitudinal pole. Each layer of the placement space is used to place one charging module. One side of the leakage protection circuit breaker cabinet is hinged to one of the vertical poles located at the front.

3. The engineering machinery vehicle-mounted charger according to claim 2, characterized in that: A mounting base is provided at the bottom of the charging module, and four limit rods are provided on the mounting base. Two limit rods located on different sides of the charging module and corresponding to each other are connected by a pressure rod. The pressure rod is used to press the charging module tightly onto the mounting base, and the mounting base is placed on the angle steel.

4. The engineering machinery vehicle-mounted charger according to claim 3, characterized in that: A rubber pad is provided between the mounting base and the charging module.

5. The engineering machinery vehicle-mounted charger according to claim 1, characterized in that: A rubber shock absorber is provided at the bottom of the cabinet.

6. The engineering machinery vehicle-mounted charger according to claim 1, characterized in that: An incoming line interface is provided at the bottom of the high-voltage distribution cabinet, and an outgoing line interface is provided at the side of the high-voltage distribution cabinet.

7. The onboard charger for construction machinery according to claim 1, characterized in that: The high-voltage distribution cabinet is provided with a first wiring copper bar, a second wiring copper bar, a third wiring copper bar, a fourth wiring copper bar, a main positive DC contactor, a first connecting copper bar, a second connecting copper bar, a third connecting copper bar, a fourth connecting copper bar, a fuse and a main negative DC contactor. The first wiring copper bar, the second wiring copper bar, the third wiring copper bar and the fourth wiring copper bar are connected in the high-voltage distribution cabinet through insulators and are spaced apart from top to bottom. The first wiring copper bar and the second wiring copper bar are used to connect to the high-voltage line of the motor controller; the two ends of the main positive DC contactor are respectively connected to the first connecting copper bar and the second connecting copper bar, the second connecting copper bar is connected to the fourth connecting copper bar through the fuse, and the first connecting copper bar is connected to the first connecting copper bar; the two ends of the main negative DC contactor are respectively connected to the third connecting copper bar and the fourth connecting copper bar, the fourth connecting copper bar is connected to the third connecting copper bar, and the third connecting copper bar is connected to the second connecting copper bar.

8. The onboard charger for construction machinery according to claim 1, characterized in that: The side of the leakage protection circuit breaker cabinet is provided with a high-voltage line inlet, a high-voltage line outlet and a ground line connection port.

9. The engineering machinery vehicle-mounted charger according to claim 1, characterized in that: The interior of the leakage protection circuit breaker cabinet is provided with a leakage protection circuit breaker, a first long connecting copper bar, a second long connecting copper bar, a third long connecting copper bar, a first short connecting copper bar, a second short connecting copper bar, a third short connecting copper bar, a first branch copper bar, a second branch copper bar and a third branch copper bar. The leakage protection circuit breaker is connected to the first long connecting copper bar, the second long connecting copper bar and the third long connecting copper bar. The first long connecting copper bar, the first short connecting copper bar and the first branch copper bar are connected in sequence. The second long connecting copper bar, the second short connecting copper bar and the second branch copper bar are connected in sequence. The third long connecting copper bar, the third short connecting copper bar and the third branch copper bar are connected in sequence.

10. The engineering machinery vehicle-mounted charger according to claim 9, characterized in that: The first long connecting copper bar, the second long connecting copper bar and the third long connecting copper bar are all bent structures.

Images