Double-source power excavator and power supply control method thereof

Abstract

The invention discloses a double-source power excavator and a power supply control method thereof, and belongs to the technical field of engineering machinery. Through the arrangement of the auxiliary power supply module and the power battery II in the vehicle-mounted module, the vehicle-mounted module can be independently powered by the auxiliary power supply module or the power battery II in the vehicle-mounted module, or the auxiliary power supply module and the power battery II in the vehicle-mounted module simultaneously supply power to the vehicle-mounted module; the requirement for long-time operation of a large-tonnage new energy excavator can be met, and the problem that in the prior art, long-time operation of equipment cannot be met is solved. And the auxiliary power supply module is configured to be a movable auxiliary power supply module, so that when the equipment is transferred or no external power supply works, the equipment can work all the time by being connected with the auxiliary power supply module without waiting for access of the auxiliary power supply module.

Description

Technical Field

[0001] The invention belongs to the technical field of engineering machinery, and in particular relates to a dual-source power excavator and a power supply control method thereof. Background Art

[0002] With the increasing global attention to environmental protection and energy efficiency, the use of new energy equipment is becoming more and more widespread, especially in the field of large-scale mechanical equipment, such as excavators. However, these devices usually require a large amount of power supply, which poses a challenge to the mobility and working time of the equipment. The traditional solution is usually to connect to the power grid through cables, but this method is inconvenient when the equipment is transferred or operated for a long time, and it requires a power grid around the equipment. However, the construction cost of the power grid is high, the cycle is long, and it cannot meet user needs in a short time. In addition, the equipment needs to be transferred frequently, and the power grid cannot be transferred at any time.

[0003] The existing technical solution is to provide power to the equipment through its own battery or external drag line radiation source. The radiation source can be in various forms, such as 6kv / 380V / 220V AC or DC output from energy storage batteries. This method can solve the problem of equipment transfer to a certain extent, and can operate without the power grid.

[0004] Although power can be provided by batteries or external dragline radiation sources, this power supply method may not meet the needs of long-term operation of large-tonnage equipment. Secondly, due to the mobility requirements of equipment, the demand for not connecting cables in short-distance scenarios is gradually increasing, and existing technical solutions still need to be improved in this regard. Finally, the existing radiation source form is relatively single and cannot meet the power requirements of different equipment or different environments. Summary of the invention

[0005] 1. Technical problem to be solved by the invention

[0006] The purpose of the present invention is to solve the problem that existing engineering machinery is difficult to disconnect from the power grid to realize fast and multi-mode power supply.

[0007] 2. Technical solution

[0008] In order to achieve the above object, the technical solution provided by the present invention is:

[0009] A dual-source power excavator of the present invention comprises

[0010] An auxiliary power supply module and an on-board module, wherein the auxiliary power supply module is configured as a movable auxiliary power supply module; the auxiliary power supply module is electrically connected to the high-voltage box BDU of the on-board module through a wiring module to supply power to the on-board module; the auxiliary power supply module includes a power battery 1 and a DCDC 1, and the power battery 1 is electrically connected to the wiring module through the DCDC 1; the wiring module includes a reel and a collector ring; the on-board module includes a power battery 2 electrically connected to the high-voltage box BDU, and the power battery 2 is electrically connected to a thermal management unit TMS.

[0011] Preferably, the high-voltage box BDU is electrically connected to an all-in-one controller and a motor controller 2, the motor controller 2 is electrically connected to a motor 1, and the all-in-one controller includes a high-voltage box PDU, a motor controller 1 and a DCDC 2.

[0012] Preferably, the high-voltage box PDU is electrically connected to a compressor and an electric heating PTC; the motor controller 1 is electrically connected to a motor 2; and the DCDC 2 is electrically connected to a battery.

[0013] A power supply control method for a dual-source power excavator, the method adopts the dual-source power excavator described above, the method is

[0014] Contains main power supply mode, auxiliary power supply mode and dual power supply mode;

[0015] When the main power supply mode is in progress, the high-voltage box BDU is disconnected from the auxiliary power module, and the vehicle-mounted module is powered by the power battery 2 of the vehicle-mounted module;

[0016] When the auxiliary power supply mode is in progress, the high-voltage box BDU closes the electrical connection with the auxiliary power module and cuts off the electrical connection with the power battery 2; at this time, the auxiliary power module supplies power to the vehicle-mounted module;

[0017] When the dual-source power supply mode is in effect, the high-voltage box BDU closes the electrical connection with the auxiliary power module and the second power battery. At this time, the auxiliary power module and the second power battery simultaneously supply power to the on-board module.

[0018] Preferably, when the dual-source power supply mode is used, the auxiliary power module outputs a constant voltage source. When V6 is less than V2, V3=V2. At this time, the power battery 2 can be charged according to the maximum charging map of the power battery. When the SOC of the power battery 2 is approximately equal to the SOC corresponding to V6=V2, the power battery 2 can be charged according to the needs of the whole machine. When it is not necessary to continue charging the power battery, the current state can be maintained, or the power mode can be manually adjusted; when the power battery 2 needs to be fully charged, V2 can be adjusted to be close to V5, but V2≤V5. At the same time, the power battery charging map can be adjusted to the rated battery charging map;

[0019] in

[0020] V1 is the rated voltage of the high-voltage system; V2 is the upper limit of the voltage at which the components in the vehicle-mounted module can work for a long time; V3 is the continuous output voltage of the auxiliary power module; V4 is the rated voltage of power battery 2; V5 is the peak voltage of power battery 2; V6 is the actual output voltage of power battery 2.

[0021] 3. Beneficial effects

[0022] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0023] The dual-source power excavator and its power supply control method of the present invention can supply power to the vehicle-mounted module through the auxiliary power module or the power battery 2 in the vehicle-mounted module alone, or the auxiliary power module and the power battery 2 in the vehicle-mounted module can supply power to the vehicle-mounted module at the same time, which can meet the demand of long-term operation of large-tonnage new energy excavators and solve the problem that the equipment in the prior art cannot meet the demand of long-term operation. The auxiliary power module is configured as a movable auxiliary power module. When the equipment is transferred or working without external power supply, it does not need to wait for its access, and it can keep working by connecting the auxiliary power module. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a dual-source power excavator of the present invention.

[0025] Explanation of the symbols in the schematic diagram:

[0026] 100, auxiliary power module; 110, power battery one; 120, DCDC one;

[0027] 200, wiring module; 210, reel; 220, collector ring;

[0028] 300, vehicle-mounted module; 310, all-in-one controller; 311, high-voltage box PDU; 312, motor controller one; 313, DCDC two; 320, high-voltage box BDU; 330, compressor; 340, electric heating PTC; 350, power battery two; 360, thermal management unit TMS; 370, motor controller two; 380, battery; 391, motor two; 392, motor one. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0030] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0031] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0032] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0033] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0034] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0035] Example 1

[0036] Refer to the attached Figure 1 A dual-source power excavator according to this embodiment includes

[0037] Auxiliary power module 100 and vehicle module 300, the auxiliary power module 100 is configured as a movable auxiliary power module 100; the auxiliary power module 100 is electrically connected to the high-voltage box BDU320 of the vehicle module 300 through the wiring module 200 to supply power to the vehicle module 300, and the vehicle module 300 includes a power battery 2 350 electrically connected to the high-voltage box BDU320, and the power battery 2 350 is electrically connected to the thermal management unit TMS360. The excavator of this embodiment can supply power to the vehicle module 300 through the auxiliary power module 100 or the power battery 2 350 in the vehicle module 300 alone, or the auxiliary power module 100 and the power battery 2 350 in the vehicle module 300 can supply power to the vehicle module 300 at the same time, which can meet the long-term operation requirements of large-tonnage new energy excavators and solve the problem that the equipment in the prior art cannot meet the requirements of long-term operation. Furthermore, the auxiliary power module 100 is configured as a movable auxiliary power module 100. When the device is transferred or working without an external power source, there is no need to wait for it to be connected, and the device can continue to work by connecting the auxiliary power module 100.

[0038] The auxiliary power module 100 includes a power battery 110 and a DCDC 120, and the power battery 110 is electrically connected to the wiring module 200 through the DCDC 120. The wiring module 200 includes a reel 210 and a collector ring 220. The reel 210 and the collector ring 220 cooperate to conveniently transmit the power of the power battery 110 to the vehicle-mounted module 300 to supply the system in the vehicle-mounted module 300 to work. The high-voltage box BDU 320 is electrically connected to the all-in-one controller 310 and the motor controller 2 270, and the all-in-one controller 310 includes a high-voltage box PDU 311, a motor controller 1 312 and a DCDC 2 313. The high-voltage box PDU 311 is electrically connected to a compressor 330 and an electric heating PTC 340. The motor controller 1 312 is electrically connected to a motor 2 391. The DCDC 2 313 is electrically connected to a battery 380. The motor controller 2 270 is electrically connected to a motor 1 392. The all-in-one controller 310 facilitates control and management of the battery 380, the motor 2 391, the compressor 330 and the electric heating PTC 340, and the overall structure is more concise and efficient.

[0039] Example 2

[0040] A power supply control method for a dual-source power excavator, the method adopts the dual-source power excavator described in Example 1, the method is

[0041] Contains main power supply mode, auxiliary power supply mode and dual power supply mode;

[0042] When the main power supply mode is in progress, the high voltage box BDU320 is disconnected from the auxiliary power module 100, and the power battery 2 350 of the vehicle-mounted module 300 supplies power to the vehicle-mounted module 300;

[0043] When the auxiliary power supply mode is in progress, the high voltage box BDU320 closes the electrical connection with the auxiliary power module 100 and cuts off the electrical connection with the power battery 2 350; at this time, the auxiliary power module 100 supplies power to the vehicle-mounted module 300;

[0044] When the dual-source power supply mode is used, the high-voltage box BDU320 closes the electrical connection with the auxiliary power module 100 and the second power battery 350 . At this time, the auxiliary power module 100 and the second power battery 350 simultaneously supply power to the vehicle-mounted module 300 .

[0045] 5. A power supply control method for a dual-source power excavator according to claim 4, characterized in that: when the dual-source power supply mode is performed, the auxiliary power module 100 outputs a constant voltage source, and when V6 is less than V2, V3=V2, at this time, the power battery 350 can be charged according to the maximum charging map of the power battery, and when the SOC of the power battery 350 is approximately equal to the SOC corresponding to V6=V2, the power battery can be maintained in the existing state or the power mode can be manually adjusted according to the needs of the whole machine when it is not necessary to continue charging the power battery; when the power battery 350 needs to be fully charged, V2 can be adjusted to be close to V5, but V2≤V5, and at the same time, the power battery charging map can be adjusted to the rated battery charging map;

[0046] in

[0047] V1 is the rated voltage of the high voltage system; V2 is the upper limit of the voltage at which the components in the vehicle-mounted module 300 can work for a long time; V3 is the continuous output voltage of the auxiliary power module 100; V4 is the rated voltage of the power battery 2 350; V5 is the peak voltage of the power battery 2 350; V6 is the actual output voltage of the power battery 2 350

[0048] The above-described embodiments only express a certain implementation mode of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A dual-source power excavator, characterized in that: include An auxiliary power module (100) and an on-board module (300), wherein the auxiliary power module (100) is configured as a movable auxiliary power module (100); the auxiliary power module (100) is electrically connected to a high-voltage box BDU (320) of the on-board module (300) through a wiring module (200) to supply power to the on-board module (300); the auxiliary power module (100) comprises a power battery 1 (110) and a DCDC 1 (120), wherein the power battery 1 (110) is electrically connected to the wiring module (200) through the DCDC 1 (120); the wiring module (200) comprises a reel (210) and a collector ring (220); the on-board module (300) comprises a power battery 2 (350) electrically connected to the high-voltage box BDU (320), and the power battery 2 (350) is electrically connected to a thermal management unit TMS (360).

2. A dual-source power excavator according to claim 1, characterized in that: The high-voltage box BDU (320) is electrically connected to the all-in-one controller (310) and the motor controller 2 (270), the motor controller 2 (270) is electrically connected to the motor 1 (392), and the all-in-one controller (310) includes a high-voltage box PDU (311), a motor controller 1 (312) and a DCDC 2 (313).

3. A dual-source power excavator according to claim 2, characterized in that: The high-voltage box PDU (311) is electrically connected to a compressor (330) and an electric heating PTC (340); the motor controller 1 (312) is electrically connected to a motor 2 (391); and the DCDC 2 (313) is electrically connected to a battery (380).

4. A power supply control method for a dual-source power excavator, characterized in that: The method adopts the dual-source power excavator according to any one of claims 1 to 3 above, and the method is Contains main power supply mode, auxiliary power supply mode and dual power supply mode; When the main power supply mode is in effect, the high voltage box BDU (320) is disconnected from the auxiliary power module (100), and the vehicle-mounted module (300) is powered by the second power battery (350) of the vehicle-mounted module (300); When the auxiliary power supply mode is in effect, the high voltage box BDU (320) closes the electrical connection with the auxiliary power module (100) and cuts off the electrical connection with the second power battery (350); at this time, the auxiliary power module (100) supplies power to the vehicle-mounted module (300); When the dual-source power supply mode is in effect, the high-voltage box BDU (320) closes the electrical connection with the auxiliary power module (100) and the second power battery (350), and the auxiliary power module (100) and the second power battery (350) simultaneously supply power to the vehicle-mounted module (300).

5. The power supply control method for a dual-source power excavator according to claim 4, characterized in that: When the dual-source power supply mode is used, the auxiliary power module (100) outputs a constant voltage source. When V6 is less than V2, V3=V2. At this time, the power battery 2 (350) can be charged according to the power battery maximum charging map. When the SOC of the power battery 2 (350) is approximately equal to the SOC corresponding to V6=V2, the power battery 2 (350) can be charged according to the needs of the whole machine. When it is not necessary to continue charging the power battery, the current state can be maintained, or the power mode can be manually adjusted. When the power battery 2 (350) needs to be fully charged, V2 can be adjusted to be close to V5, but V2≤V5. At the same time, the power battery charging map can be adjusted to the rated battery charging map. in V1 is the rated voltage of the high-voltage system; V2 is the upper limit of the voltage at which the components in the vehicle-mounted module (300) can work for a long time; V3 is the continuous output voltage of the auxiliary power module (100); V4 is the rated voltage of the second power battery (350); V5 is the peak voltage of the second power battery (350); and V6 is the actual output voltage of the second power battery (350).

Images