Power-off protection system for battery power supply control system of pure electric mining dump truck

Abstract

The utility model relates to a power-off protection system for a battery power supply control system of a pure electric mining dump truck, which comprises a main circuit system and a control loop system, the main circuit system is provided with two paths, and one path comprises a high-voltage battery box, a DCDC module, a storage battery, a first fuse, a first contactor normally open contact a and a battery power supply control system control box which are electrically connected in sequence; the other path is electrically connected with a second fuse at the rear end of the DCDC module, and a normally open contact of a second contactor is electrically connected to a battery power supply control system control box; the control loop system is provided with two paths, namely a first control loop and a second control loop, the first control loop controls opening and closing of a normally open contact a of a first contactor, the second control loop controls opening and closing of a normally open contact of a second contactor, the first control loop is linked with the second control loop, and the second control loop is automatically closed when the first control loop is disconnected; the risk that the control box of the battery power supply control system loses power in the working process of the pure electric mining dump truck can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of control systems, and in particular to a power failure protection system for a battery power control system of a pure electric mining dump truck. Background Art

[0002] To utilize clean energy, open-pit mines currently utilize pure electric dump trucks. These trucks feature a relatively simple battery power control system circuit, which uses a contactor to control the main power switch to connect and disconnect the power system. During operation, the power system is powered by the power battery, providing the vehicle's energy source. When the main power switch is turned on, the power battery power control system begins operating. Pure electric dump trucks primarily operate under heavily loaded downhill conditions. If the power system circuit abnormally disconnects during operation, the battery power control system control box loses power, potentially causing a power outage for the entire vehicle and disabling the electric brakes, potentially leading to a safety incident. Utility Model Content

[0003] In order to solve or partially solve the problems existing in the related art, the present application provides a power-off protection system for the battery power control system of a pure electric mining dump truck, which can reduce the risk of power failure of the battery power control system control box during the operation of the pure electric mining dump truck.

[0004] The present application discloses a power failure protection system for a battery power control system of a pure electric mining dump truck, comprising a main circuit system and a control circuit system; the control circuit system is used to control the main circuit system; the main circuit system is provided with two paths, one of which comprises a high-voltage battery box, a DC / DC module, a battery, a first fuse, a first contactor normally open point a, and a battery power control system control box electrically connected in sequence; the other path is electrically connected to a second fuse and a second contactor normally open point at the rear end of the DC / DC module, and the second contactor normally open point is electrically connected to the battery power control system control box;

[0005] The control circuit system is set up with two circuits, namely the first control circuit and the second control circuit. The first control circuit controls the opening and closing of the normally open point a of the first contactor, and the second control circuit controls the opening and closing of the normally open point of the second contactor. The first control circuit and the second control circuit are linked. When the first control circuit is disconnected, the second control circuit is automatically closed.

[0006] Optionally, the first control circuit is arranged at the rear end of the first fuse, including a normally closed stop button, a normally open start button, a first contactor coil, and a first contact normally open point b connected in parallel with the normally open start button.

[0007] Optionally, the second control loop is arranged at the rear end of the DCDC module, including a third fuse arranged in series, a first contactor normally open point c, a switching switch, a first contactor normally closed point, and a second contactor coil, and a switching end of the switching switch is connected to the front end of the first contactor normally open point c.

[0008] Optionally, the normally closed stop button is linked to the transfer switch so that when the normally closed stop button is pressed, the transfer switch is in an upward state.

[0009] The technical solution provided by this application may have the following beneficial effects:

[0010] This system connects one main circuit system through the battery and sets up one control circuit system for normal on-off control. After the total DCDC module, one main circuit system is set up bypassing the battery and another control circuit system is set up. When the first control circuit system is abnormally disconnected, the other control circuit system can automatically start and connect the other main circuit system to avoid power failure of the battery power control system control box, effectively reducing the risk of power failure of the battery power control system control box and electric brake failure after abnormal power failure of the power system, which may cause safety accidents.

[0011] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The above and other objects, features and advantages of the present application will become more apparent through a more detailed description of exemplary embodiments of the present application in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present application.

[0013] Figure 1 This is a schematic diagram of the circuit control system structure shown in an embodiment of the present application;

[0014] Reference numerals:

[0015] 1. High-voltage battery box; 2. DCDC module; 3. Battery; 41. First fuse; 42. Second fuse; 43. Third fuse; 51. First contactor normally open point a; 52. First contactor coil; 53. First contactor normally open point b; 54. First contactor normally closed point; 55. First contactor normally open point c; 91. Second contactor normally open point; 92. Second contactor coil; 6. Battery power control system control box; 7. Normally closed stop button; 8. Normally open start button; Second contactor normally open point (91); Second contactor coil (92); 10. Transfer switch. DETAILED DESCRIPTION

[0016] The following describes embodiments of the present application in more detail with reference to the accompanying drawings. Although the accompanying drawings illustrate embodiments of the present application, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0017] It should be understood that although the terms "first", "second", "third", etc. may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0018] In the description of this application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0019] Unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, they may refer to fixed or detachable connections, or integration; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0020] In response to the above problems, an embodiment of the present application provides a power-off protection system for a battery power control system of a pure electric mining dump truck. The technical solution of the embodiment of the present application is described in detail below with reference to the accompanying drawings.

[0021] like Figure 1The illustrated embodiment of a battery power control system power failure protection system for a pure electric mining dump truck includes a main circuit system and a control circuit system; the control circuit system is used to control the main circuit system. The main circuit system comprises two circuits: one circuit electrically connects a high-voltage battery box 1, a DC / DC module 2, a battery 3, a first fuse 41, a first contactor normally open point a51, and a battery power control system control box 6; the other circuit electrically connects a second fuse 42 and a second contactor normally open point 91 at the rear end of the DC / DC module 2; the second contactor normally open point 91 is electrically connected to the battery power control system control box 6.

[0022] The control circuit system is provided with two circuits, namely the first control circuit and the second control circuit. The first control circuit controls the opening and closing of the normally open point a51 of the first contactor, and the second control circuit controls the opening and closing of the normally open point 91 of the second contactor. The first control circuit and the second control circuit are linked. When the first control circuit is abnormally disconnected, the second control circuit automatically closes.

[0023] In this system, the high-voltage battery box 1 is installed in the vehicle box of the pure electric vehicle and provides power for the vehicle load during normal operation of the vehicle. The DCDC module 2 is installed at the output end of the high-voltage battery box and is used to convert the DC 680V voltage of the high-voltage battery box into a DC 24V voltage. The battery 3 is charged through the first control loop or the second control loop provides a 24V DC voltage to the control box of the direct battery power control system. The battery 3 is installed at the output end of the DCDC module 2 and is used to provide a low-voltage 24V DC voltage to the battery power control system control box 6 to ensure the normal operation of the battery power control system control box 6. The first fuse 41 is installed at the positive pole of the line for line protection and fault removal. The battery power control system control box 6 is used to detect whether the voltage, current, insulation and other parameters of each battery of the pure electric vehicle are normal, and complete the processing of relevant detection data.

[0024] In this system, the first control circuit is located at the rear end of the first fuse 41 and includes a normally closed stop button 7, a normally open start button 8, a first contactor coil 52, and a first contactor normally open point b 53 connected in parallel with the normally open start button 8. The second control circuit is located at the rear end of the DC / DC module 2 and includes a third fuse 43, a first contactor normally open point c 55, a transfer switch, and a second contactor coil 92. The transfer end of the transfer switch 10 is connected to the front end of the first contactor normally open point c 55.

[0025] In this system, the first contactor coil 52 is installed in the first control circuit. When the normally open start button 8 is pressed, the first contactor coil 52 is energized. When the first contactor coil 52 is energized, the first contactor's normally open point a51 closes, and the battery 3 provides 24V to the battery power control system control box 6. This disconnects the first contactor's normally closed point 54, disabling the second control circuit. A normally closed stop button 7 is installed in the first control circuit and disconnects the 24V power supply when the vehicle is parked. A normally open start button 8 is installed in the first control circuit and connects the 24V power supply while the vehicle is running. A second contactor coil 92 is installed in the second control circuit. If the first control circuit is abnormally disconnected, the second contactor coil 92 is energized, closing the second contactor's normally open point 91. The DC-DC module 2 directly provides 24V to the battery power control system control box, ensuring proper operation.

[0026] In one embodiment, since the transfer switch 10 requires manual switching and has two terminals, it is prone to manual manipulation by the operator. Therefore, the normally closed stop button 7 is linked to the transfer switch 10 so that when the normally closed stop button 7 is pressed, the transfer switch 10 is in the upward state. In this way, there are only three switches on the control panel that require manual mechanical operation: the normally open start button 81 pulse switch and the normally closed stop button 71 pulse switch, and the transfer switch 10 that requires manual reset. When it is necessary to disconnect the two control circuits, the normally closed stop button 71 is pressed, the first control circuit is disconnected, and the transfer switch 10 is automatically in the upward state under the linkage, disconnecting the second control circuit. When normal operation is required, the transfer switch 10 can be manually reset to the downward state.

[0027] In this device, the specific control of the main circuit system controlled by the first control loop and the second control loop is as follows:

[0028] During normal operation, when the normally open start button 8 is closed, the first control circuit is connected, the first contactor coil 52 is energized, and the first contactor normally open point a51, the first contactor normally open point b52, and the first contactor normally open point c are closed and maintained by the energization of the first contactor coil 52, and the first control circuit operates normally. Although the second control circuit switch 10 has been reset, the first contactor normally closed point 54 is opened due to the energization of the first contactor coil 52, and the second control circuit is in an open state.

[0029] When closing, the normally closed stop button 7 is cut off, the first control circuit is disconnected, the first contactor normally open point a51 and the first contact normally open point b52 and the first contact normally open point c are disconnected due to the loss of power to the first contactor coil 52, and the first control circuit is closed. At the same time, the switching switch 10 of the second control circuit is turned upward under linkage, and the second control circuit is also disconnected at the same time.

[0030] During the normal operation of the first control circuit, the first contactor normally closed point closes and disconnects the second control circuit due to the power supply of the first contactor coil 52. The second contactor normally open point is normally open and disconnected due to the power loss of the second contactor coil 92. The second control circuit and the second main circuit are both in the disconnected state.

[0031] When the first control circuit is abnormally disconnected, since the normally closed stop button 7 is not pressed manually, the transfer switch 10 is still in the reset state, connecting the circuit above the first contactor normally closed point 54, and the first contactor normally open point a51 loses power due to the first contactor coil 52, the first contactor normally open point a51 and the first contact normally open point b52 are disconnected due to the first contactor coil 52, and at the same time, the first contactor normally closed point 54 is closed, the second contactor coil 92 is energized, the second contactor normally open point 91 is closed, and the second main circuit enters operation, keeping the battery power control system control box 6 working normally. When it is necessary to disconnect the second control circuit, press the normally closed stop button 7.

[0032] In this device, one main circuit system is connected through the battery and one control circuit system is set up to perform normal on-off control. One main circuit system is set up behind the total DCDC module, bypassing the battery, and another control circuit system is set up. When the first control circuit system is abnormally disconnected, the other control circuit system can automatically start and connect the other main circuit system to avoid power failure of the battery power control system control box, effectively reducing the risk of power failure of the battery power control system control box and electric brake failure after abnormal power failure of the power system, thereby causing safety accidents.

[0033] Finally, it should be noted that, in this document, relationships such as first and second, etc., are used solely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms include, comprise, or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0035] The embodiments of the present application have been described above. The above description is illustrative and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, their practical applications, or improvements to the technology in the market, or to enable other persons skilled in the art to understand the embodiments disclosed herein.

Claims

1. A power failure protection system for a battery power control system of a pure electric mining dump truck, comprising a main circuit system and a control loop system; the control loop system is used to control the main circuit system; and is characterized by: The main circuit system is provided with two paths, one of which comprises a high-voltage battery box (1), a DCDC module (2), a storage battery (3), a first fuse (41), a first contactor normally open point a (51), and a battery power control system control box (6) which are electrically connected in sequence; the other path is electrically connected to a second fuse (42), a second contactor normally open point (91) at the rear end of the DCDC module (2), and the second contactor normally open point (91) is electrically connected to the battery power control system control box (6); The control circuit system is provided with two circuits, namely a first control circuit and a second control circuit. The first control circuit controls the opening and closing of the normally open point a (51) of the first contactor, and the second control circuit controls the opening and closing of the normally open point (91) of the second contactor. The first control circuit and the second control circuit are linked to each other. When the first control circuit is disconnected, the second control circuit is automatically closed.

2. A power failure protection system for a battery power control system of a pure electric mining dump truck according to claim 1, characterized in that: The first control circuit is arranged at the rear end of the first fuse (41), and includes a normally closed stop button (7), a normally open start button (8) arranged in series, a first contactor coil (52), and a first contact normally open point b (5) connected in parallel with the normally open start button (8).

3. The power failure protection system of the battery power control system of a pure electric mining dump truck according to claim 2 is characterized in that: The second control circuit is arranged at the rear end of the DCDC module (2), and comprises a third fuse (43) arranged in series, a first contactor normally open point c (55), a transfer switch (10), a first contactor normally closed point (54), and a second contactor coil (92). A transfer end of the transfer switch (10) is connected to the front end of the first contactor normally open point c (55).

4. A power failure protection system for a battery power control system of a pure electric mining dump truck according to claim 3, characterized in that: The normally closed stop button (7) is linked to the conversion switch (10) so that when the normally closed stop button (7) is pressed, the conversion switch (10) is in an upward state.

Images