High-power new energy engineering vehicle power supply device

Abstract

The invention provides a power supply device for a high-power new energy engineering vehicle, which is characterized in that a traction module adopts a double-sided phase module arrangement form, and an inverter bridge arm is arranged on each of two surfaces of a water cooling plate; the traction module comprises a traction phase module and a traction chopping module, and each traction motor corresponds to one group of traction modules; three DC / DC modules are arranged and are respectively connected with a traction phase module through a high-voltage intermediate bus; a plurality of supporting capacitors are arranged and are connected with a traction phase module through a high-voltage intermediate bus; the SIV module is connected with the DC / DC module through a high-voltage intermediate bus; the reactor is connected with the DC / DC module, and the DC / DC module is connected with the power battery pack and the DC600V load through the reactor. One end of a water-cooling 24V DC / DC module is connected with a 24V load, and the other end of the water-cooling 24V DC / DC module is connected with a DC / DC module through One end of the DC / AC module is connected with a traction ventilator, and the other end of the DC / AC module is connected with the DC / DC module through a high- A controller is electrically connected with a traction module, a DC / DC module, a supporting capacitor, an SIV module, an electric reactor, a 24V DC / DC module and a DC / AC module.

Description

Technical Field

[0001] The present invention relates to the technical field of power supply, and in particular to a high-power new energy engineering vehicle power supply device. Background Art

[0002] With the advancement of the national new energy strategy, new energy equipment has developed rapidly in various industries. Since engineering vehicles have the characteristics of high power and high energy consumption, the application of electric new energy engineering vehicles has huge economic benefits.

[0003] In the prior art, a high-voltage topology of an all-in-one controller for electric engineering vehicles is disclosed. This solution also uses a power battery as a power source, but this solution does not use a DC / DC device, but directly uses battery conversion, and does not mention a specific implementation plan. This solution uses a battery power source directly in the converter without DCDC conversion. It is difficult to equalize the voltage and current when multiple battery groups are connected in parallel, so the number of parallel groups is limited, and it is difficult to apply it in a high-power system with a large battery power demand.

[0004] In the prior art, a mining truck electric drive control cabinet is also disclosed, and the control cabinet described is an air-cooled structure. The integration and power level are limited, and it is not suitable for high-power systems. Summary of the invention

[0005] According to the technical problems raised above, a high-power new energy engineering vehicle power supply device is provided. The power device can be applied to high-power engineering vehicles, which integrates the traction power supply, auxiliary power supply, DC / DC power conversion unit, 24V load low-voltage power supply, DC600V load power supply and other power supplies required by the whole vehicle. It has the advantages of high integration and high reliability. And by setting a high-voltage intermediate bus, the scalability of the system is increased, which can easily increase the battery capacity and add the rear-end load source module.

[0006] The technical means adopted by the present invention are as follows:

[0007] A high-power new energy engineering vehicle power supply device includes: a cabinet and a traction module, a DC / DC module, a support capacitor, a SIV module, a reactor, a 24VDC / DC module, a DC / AC module and a controller arranged inside the cabinet, wherein:

[0008] The traction module adopts a double-sided phase module arrangement, and an inverter bridge arm is arranged on both sides of the water-cooled plate; the traction module includes a traction phase module and a traction chopper module, the traction phase module includes two-phase outputs in the traction motor, the traction chopper module includes one-phase output and one chopper output in the traction motor, and each traction motor corresponds to a group of traction modules;

[0009] The DC / DC module comprises a first DC / DC module, a second DC / DC module and a third DC / DC module, and is respectively connected to the traction phase modules via a high-voltage intermediate bus;

[0010] The supporting capacitor is provided in plurality and connected to the traction phase module via a high-voltage intermediate bus;

[0011] The SIV module is arranged below the DC / DC module and connected to the DC / DC module via a high-voltage intermediate bus;

[0012] The reactor is connected to the DC / DC module, and the DC / DC module is respectively connected to the power battery pack and the DC600V load through the reactor;

[0013] The water-cooled 24V DC / DC module has one end connected to a 24V load and the other end connected to a DC / DC module via a high-voltage intermediate bus;

[0014] The DC / AC module has one end connected to the traction fan and the other end connected to the DC / DC module via a high-voltage intermediate bus;

[0015] The controller is electrically connected to the traction module, the DC / DC module, the support capacitor, the SIV module, the reactor, the 24VDC / DC module and the DC / AC module.

[0016] Furthermore, the traction module comprises two groups of traction phase modules and two groups of traction chopper modules arranged vertically, wherein:

[0017] The traction phase modules are respectively a first traction phase module and a second traction phase module, the first traction phase module includes a first U phase module and a first V phase module; the second traction phase module includes a second U phase module and a second V phase module;

[0018] The traction chopping modules are respectively a first traction chopping module and a second traction chopping module. The first traction chopping module includes a first W-phase module and a first chopping module; the second traction chopping module includes a second W-phase module and a second chopping module.

[0019] Furthermore, the first DC / DC module, the second DC / DC module and the third DC / DC module each include two DC / DC circuits, wherein:

[0020] The first DC / DC module includes two DC / DC boost circuits;

[0021] The second DC / DC module includes two DC / DC boost circuits;

[0022] The third DC / DC module includes a DC / DC boost circuit and a DC / DC buck circuit.

[0023] Furthermore, the reactor includes a step-up reactor and a step-down reactor, wherein:

[0024] The boost reactor is respectively connected to two DC / DC boost circuits in the first DC / DC module, two DC / DC boost circuits in the second DC / DC module, and one DC / DC boost circuit in the third DC / DC module;

[0025] The step-down reactor is connected to a DC / DC step-down circuit in the third DC / DC module.

[0026] Furthermore, the step-up reactor and the step-down reactor are both water-cooled reactors, and the compartments where the step-up reactor and the step-down reactor are located are provided with ventilation grilles.

[0027] Furthermore, a water cooling interface and an emergency valve group are arranged on the side of the cabinet, which are respectively connected to four water channels, and a main valve body is arranged on the four water channels respectively, and a bypass valve body is arranged between the water channels; each water channel is provided with a water pump, and the heat exchanger structure of each water channel is connected together to form a heat exchanger group.

[0028] Furthermore, the water-cooled 24VDC / DC modules are provided in three groups, namely a first water-cooled 24VDC / DC module, a second water-cooled 24VDC / DC module and a third water-cooled 24VDC / DC module.

[0029] Furthermore, a filter unit is also provided in the cabinet, one end of the filter unit is connected to the SIV module, and the other end is connected to the AC380V load.

[0030] Furthermore, a load module is connected to the high-voltage intermediate busbar to increase the rear-end load supply source.

[0031] Compared with the prior art, the present invention has the following advantages:

[0032] 1. The high-power new energy engineering vehicle power supply device provided by the present invention is suitable for high-power engineering vehicles, which integrates the traction power supply required by the whole vehicle, AC380V power supply, DC / DC power conversion unit, 24V load low-voltage power supply, DC600V load power supply and other power supplies required by the whole vehicle. It has the advantages of high integration and high reliability, and by setting a high-voltage intermediate bus, the scalability of the system is increased, and the battery capacity can be easily increased, as well as the rear-end load supply module.

[0033] 2. A high-power new energy engineering vehicle power supply device provided by the present invention adopts a full water-cooling method. The power module, reactor, and transformer all adopt a water-cooling solution. Through a multi-pump group-based cooling method, different device types of the entire vehicle are grouped and cooled, avoiding the problems of uneven flow distribution for multi-module cooling in a traditional single water channel, excessive flow pressure in the main pipeline, and high cost of the cooling pump. In addition, by setting an emergency valve group, flow expansion in an emergency state is achieved. When a group of water pumps fails, normal cooling of the equipment can be achieved, thereby improving the reliability of the system.

[0034] 3. The present invention provides a high-power new energy engineering vehicle power supply device, in which the traction module adopts a double-sided phase module arrangement, that is, an inverter bridge arm is arranged on both sides of the water-cooled plate, and has a high degree of integration while ensuring that the module has good heat dissipation performance.

[0035] 4. The present invention provides a high-power new energy engineering vehicle power supply device, which adopts a low-inductance busbar design between traction phase modules and between the traction phase modules and the supporting capacitors, effectively preventing the problem of current circulation between modules.

[0036] 5. The present invention provides a high-power new energy engineering vehicle power supply device, which uses multiple DC / DC units to boost the battery pack voltage to 1500V and collect it to the high-voltage bus. Each power module draws power through the high-voltage bus. The high-voltage bus can effectively reduce the current in each link, reduce losses and improve system efficiency. Each group of power batteries is connected in parallel after being boosted by DC / DC, which solves the problem that traditional power batteries cannot be connected in parallel due to voltage and current sharing limitations.

[0037] Based on the above reasons, the present invention can be widely promoted in the fields of power supply and the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0039] Figure 1 It is a schematic diagram of the structure of the high-power new energy engineering vehicle power supply device of the present invention.

[0040] Figure 2 It is a circuit topology diagram of the high-power new energy engineering vehicle power supply device of the present invention.

[0041] Figure 3 It is a schematic diagram of the circuit expansion topology of the high-power new energy engineering vehicle power supply device of the present invention.

[0042] Figure 4 It is a schematic diagram of the waterway principle of the present invention.

[0043] Figure 5 This is a waterway grouping diagram of the present invention.

[0044] In the figure: 1. Traction phase module; 2. Traction chopper module; 3. DC / DC boost circuit; 4. DC / DC buck circuit; 5. Support capacitor; 6. High-voltage intermediate bus; 7. SIV module; 8. Boost reactor; 9. Buck reactor; 10. Filter unit; 11. DC / AC module; 12. Water-cooled 24VDC / DC module; 13. Water-cooling interface and emergency valve group; 14. Controller. DETAILED DESCRIPTION

[0045] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments 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 creative work should fall within the scope of protection of the present invention.

[0046] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0047] like Figure 1-3 As shown, the present invention provides a high-power new energy engineering vehicle power supply device, including: a cabinet and a traction module arranged inside the cabinet, a DC / DC module, a support capacitor 5, a SIV module 7, a reactor, a 24VDC / DC module, a DC / AC module 11 and a controller 14, wherein:

[0048] The traction module adopts a double-sided phase module arrangement, and an inverter bridge arm is arranged on both sides of the water-cooled plate; the traction module includes a traction phase module 1 and a traction chopper module 2, the traction phase module 1 includes two-phase outputs in the traction motor, the traction chopper module 2 includes one-phase output and one chopper output in the traction motor, and each traction motor corresponds to a group of traction modules;

[0049] The DC / DC module includes a first DC / DC module, a second DC / DC module and a third DC / DC module, and is respectively connected to the traction phase module 1 through a high-voltage intermediate bus 6;

[0050] The supporting capacitor 5 is provided in plurality and connected to the traction phase module 1 via a high-voltage intermediate bus 6;

[0051] The SIV module 7 is arranged below the DC / DC module and connected to the DC / DC module via the high-voltage intermediate bus 6;

[0052] The reactor is connected to the DC / DC module, and the DC / DC module is respectively connected to the power battery pack and the DC600V load through the reactor;

[0053] The water-cooled 24V DC / DC module 12 has one end connected to a 24V load and the other end connected to a DC / DC module via a high-voltage intermediate bus 6;

[0054] The DC / AC module 11 has one end connected to the traction fan and the other end connected to the DC / DC module via the high-voltage intermediate bus 6;

[0055] The controller 14 is electrically connected to the traction module, the DC / DC module, the support capacitor, the SIV module, the reactor, the 24VDC / DC module and the DC / AC module.

[0056] When specifically implemented, as a preferred embodiment of the present invention, Figure 2 , 3 As shown, the traction module includes two groups of traction phase modules 1 and two groups of traction chopper modules 2 arranged vertically, wherein:

[0057] The traction phase modules 1 are respectively the first traction phase module and the second traction phase module, the first traction phase module includes the first U phase module and the first V phase module; the second traction phase module includes the second U phase module and the second V phase module;

[0058] The traction chopping module 2 is respectively a first traction chopping module and a second traction chopping module. The first traction chopping module includes a first W-phase module and a first chopping module; the second traction chopping module includes a second W-phase module and a second chopping module.

[0059] In this embodiment, the traction module adopts a double-sided phase module arrangement, that is, an inverter bridge arm is arranged on both sides of the water-cooled plate, which has a high degree of integration while ensuring good heat dissipation performance of the module. A low-inductance busbar design is used between the traction phase modules and between the traction phase modules and the supporting capacitors to effectively prevent the problem of current circulation between modules.

[0060] When specifically implemented, as a preferred embodiment of the present invention, Figure 2 , 3 As shown, the first DC / DC module, the second DC / DC module and the third DC / DC module respectively include two DC / DC circuits, wherein:

[0061] The first DC / DC module includes two DC / DC boost circuits 3;

[0062] The second DC / DC module comprises two DC / DC boost circuits 3;

[0063] The third DC / DC module includes a DC / DC boost circuit and a DC / DC buck circuit 4 .

[0064] When specifically implemented, as a preferred embodiment of the present invention, Figure 2 , 3 As shown, the reactor includes a step-up reactor 8 and a step-down reactor 9, wherein:

[0065] The boost reactor 8 is respectively connected to the two DC / DC boost circuits in the first DC / DC module, the two DC / DC boost circuits in the second DC / DC module, and the one DC / DC boost circuit in the third DC / DC module;

[0066] The step-down reactor 9 is connected to a DC / DC step-down circuit in the third DC / DC module.

[0067] In specific implementation, as a preferred embodiment of the present invention, the boost reactor 8 and the buck reactor 9 are both water-cooled reactors, and the compartments where the boost reactor 8 and the buck reactor 9 are located are provided with ventilation grilles.

[0068] In specific implementation, as a preferred embodiment of the present invention, the water-cooled 24VDC / DC modules 12 are provided in three groups, namely a first water-cooled 24VDC / DC module, a second water-cooled 24VDC / DC module and a third water-cooled 24VDC / DC module.

[0069] In specific implementation, as a preferred embodiment of the present invention, a filter unit 10 is further provided in the cabinet, one end of the filter unit 10 is connected to the SIV module 7, and the other end is connected to the AC380V load.

[0070] When specifically implemented, as a preferred embodiment of the present invention, Figure 2 The figure shows the circuit topology diagram of the device. A high-voltage bus is provided in the device. The design scheme of the high-voltage bus is adopted. Multiple DC / DC units are used to boost the voltage of the battery pack to 1500V and collect it to the high-voltage bus. Each power module draws power through the high-voltage bus. The high-voltage bus can effectively reduce the current in each link, reduce the loss and improve the efficiency of the system. Each group of power batteries is connected in parallel after being boosted by DC / DC. It can meet the needs of high-power and large battery engineering vehicles.

[0071] In specific implementation, as a preferred embodiment of the present invention, a load module is also connected to the high-voltage intermediate bus to increase the rear-end load supply. In this embodiment, the device integrates the traction power supply required by the whole vehicle, AC380V power supply, DC / DC power conversion unit, 24V load low-voltage power supply, DC600V load power supply and other power supplies required by the whole vehicle. It has the advantages of high integration and high reliability, and through the high-voltage intermediate bus, the scalability of the system is increased, which can easily increase the battery capacity and add rear-end load supply modules. The circuit expansion topology diagram is shown in the figure. Figure 3 shown.

[0072] In specific implementation, as a preferred embodiment of the present invention, in this embodiment, the device is divided into four water paths according to the function and flow resistance heat dissipation characteristics, such as Figure 5 As shown, a water cooling interface and an emergency valve group 13 are arranged on the side of the cabinet, and a main valve body is arranged on each of the four water channels, and a bypass valve body is arranged between each water channel. Figure 4 As shown, each water circuit is provided with a water pump, and the heat exchanger structure of each water circuit is connected together to form a heat exchanger group. In addition, the flow expansion in emergency state is realized by setting up an emergency valve group. When a group of water pumps fails, the main valve of the failed water circuit can be closed, and one or more bypass valves can be opened, that is, the cooling of the equipment in emergency state can be realized, and the reliability of the system can be improved. The main valve body and the bypass valve body can use manual or electric valve bodies as needed. The entire device has a large number of modules and reactors that need to dissipate heat inside, and the temperature and flow resistance of the cooling water of the modules and reactors are very different. If the traditional single cooling water circuit solution is adopted, it is not only difficult to achieve flow distribution, but also the heat exchange effect is poor, and the reliability is also low. The flow and pressure of the main pipeline are too large, and the pipeline is prone to leakage risks. The cost of the cooling pump and water circuit is also high.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-power new energy engineering vehicle power supply device, characterized in that: include: A cabinet and a traction module, a DC / DC module, a support capacitor (5), a SIV module (7), a reactor, a 24VDC / DC module, a DC / AC module (11) and a controller (14) arranged inside the cabinet, wherein: The traction module adopts a double-sided phase module arrangement form, and an inverter bridge arm is arranged on both sides of the water-cooled plate; the traction module comprises a traction phase module (1) and a traction chopper module (2), the traction phase module (1) comprises two-phase outputs in the traction motor, the traction chopper module (2) comprises one-phase output and one chopper output in the traction motor, and each traction motor corresponds to a group of traction modules; The DC / DC module comprises a first DC / DC module, a second DC / DC module and a third DC / DC module, and is respectively connected to the traction phase module (1) via a high-voltage intermediate bus (6); The supporting capacitor (5) is provided in plurality and is connected to the traction phase module (1) via a high-voltage intermediate bus (6); The SIV module (7) is arranged below the DC / DC module and connected to the DC / DC module via a high-voltage intermediate bus (6); The reactor is connected to the DC / DC module, and the DC / DC module is respectively connected to the power battery pack and the DC600V load through the reactor; The water-cooled 24V DC / DC module (12) has one end connected to a 24V load and the other end connected to a DC / DC module via a high-voltage intermediate bus (6); The DC / AC module (11) has one end connected to the traction fan and the other end connected to the DC / DC module via a high-voltage intermediate bus (6); The controller (14) is electrically connected to the traction module, the DC / DC module, the support capacitor, the SIV module, the reactor, the 24VDC / DC module and the DC / AC module.

2. A high-power new energy engineering vehicle power supply device according to claim 1, characterized in that: The traction module comprises two groups of traction phase modules (1) and two groups of traction chopper modules (2) arranged vertically, wherein: The traction phase modules (1) are respectively a first traction phase module and a second traction phase module, the first traction phase module comprises a first U phase module and a first V phase module; the second traction phase module comprises a second U phase module and a second V phase module; The traction chopper modules (2) are respectively a first traction chopper module and a second traction chopper module, the first traction chopper module comprises a first W-phase module and a first chopper module; the second traction chopper module comprises a second W-phase module and a second chopper module.

3. A high-power new energy engineering vehicle power supply device according to claim 1, characterized in that: The first DC / DC module, the second DC / DC module and the third DC / DC module each include two DC / DC circuits, wherein: The first DC / DC module comprises two DC / DC boost circuits (3); The second DC / DC module comprises two DC / DC boost circuits (3); The third DC / DC module comprises a DC / DC boost circuit and a DC / DC buck circuit (4).

4. A high-power new energy engineering vehicle power supply device according to claim 1, characterized in that: The reactor comprises a step-up reactor (8) and a step-down reactor (9), wherein: The boost reactor (8) is respectively connected to the two DC / DC boost circuits in the first DC / DC module, the two DC / DC boost circuits in the second DC / DC module, and the one DC / DC boost circuit in the third DC / DC module; The step-down reactor (9) is connected to a DC / DC step-down circuit in the third DC / DC module.

5. A high-power new energy engineering vehicle power supply device according to claim 4, characterized in that: The step-up reactor (8) and the step-down reactor (9) are both water-cooled reactors, and the compartments where the step-up reactor (8) and the step-down reactor (9) are located are provided with ventilation grilles.

6. A high-power new energy engineering vehicle power supply device according to claim 1, characterized in that: The side of the cabinet is provided with a water cooling interface and an emergency valve group (13), which are respectively connected to four water channels, each of which is provided with a main valve body, and a bypass valve body is provided between the water channels; each water channel is provided with a water pump, and the heat exchanger structure of each water channel is connected together to form a heat exchanger group.

7. A high-power new energy engineering vehicle power supply device according to claim 1, characterized in that: The water-cooled 24VDC / DC modules (12) are arranged in three groups, namely a first water-cooled 24VDC / DC module, a second water-cooled 24VDC / DC module and a third water-cooled 24VDC / DC module.

8. A high-power new energy engineering vehicle power supply device according to claim 1, characterized in that: A filter unit (10) is also provided in the cabinet, one end of the filter unit (10) is connected to the SIV module (7), and the other end is connected to the AC380V load.

9. A high-power new energy engineering vehicle power supply device according to claim 1, characterized in that: A load module is also connected to the high-voltage intermediate busbar to increase the rear-end load supply source.

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