Battery power supply automatic switching system of electric carry-scraper

Abstract

The invention discloses an electric carry-scraper battery power supply automatic switching system, and belongs to the technical field of energy storage and power supply, the electric carry-scraper battery power supply automatic switching system is provided with a storage battery pack and a switching structure, the switching structure comprises a locking cylinder and a detection circuit, a reciprocating column is arranged in the locking cylinder, switching cylinders are uniformly distributed on the lower surface of the locking cylinder, and wheel driving cylinders are arranged below the switching cylinders; a charging block and a discharging block are arranged in the wheel moving cylinder, the charging block and the discharging block can be connected with the positive electrode of a storage battery in the storage battery pack in turn through reciprocating operation of the reciprocating column in the locking cylinder, the detection circuit can detect the discharging time of the storage battery, and the storage battery in the storage battery pack meets the power supply requirement of the electric carry-scraper and also can be connected with the positive electrode of the storage battery in turn. The storage batteries in the storage battery pack can be automatically switched between charging and discharging, the operation time of the electric carry-scraper is prolonged, the charging efficiency of the storage batteries is improved, and the utilization rate of the storage batteries is increased.

Description

TECHNICAL FIELD

[0001] The application is a battery power automatic switching system of an electric shovel, belonging to the technical field of energy storage power supply. BACKGROUND

[0002] The shovel is a kind of shovel transport machinery that uses a shovel to cut and load the soil into the shovel for transportation, which can complete the comprehensive operation of cutting, loading, transporting, unloading, and layered filling and local rolling of the soil. The traditional shovel uses diesel as a power source, but diesel pollution is large, which affects the health of workers. At present, most shovels use energy storage battery packs as a power source, which not only solves the pollution problem, but also saves energy.

[0003] In reality, the battery pack often stops the operation of the electric shovel when charging, and uses the charging station to charge the battery pack. In order to change this disadvantage, people often install photovoltaic module power generation devices to charge the battery while operating the electric shovel. However, the battery is charging and discharging at the same time, which affects the charging efficiency of the battery, and also causes the battery to heat up, which may even cause a battery fire accident. Moreover, most existing batteries do not have online capacity detection function, which affects the working time of the electric shovel. Therefore, some technicians in the field have developed an electric shovel battery power automatic switching system to overcome the above problems. SUMMARY

[0004] The technical problem to be solved by the present application is to provide an electric shovel battery power automatic switching system to overcome the above problems. The electric shovel battery in the present application can automatically charge the idle battery while meeting the power supply of the electric shovel operation, and can also automatically detect the capacity of the battery, so that the electric shovel battery automatically switches between power supply and charging, improves the operation time of the electric shovel, and improves the charging efficiency and utilization rate of the battery.

[0005] To solve the above technical problems, the application adopts the following technical scheme: A battery power automatic switching system of an electric shovel, comprising an electric shovel, a photovoltaic module vertically arranged above the electric shovel, a battery pack arranged in the middle of the electric shovel, a switching structure arranged above the battery pack, a negative bus bar and a positive bus bar arranged in the electric shovel, the negative bus bar and the positive bus bar being connected with the photovoltaic module through a cable, the negative bus bar being fixedly connected with the negative electrode of the battery pack, and the positive bus bar being located obliquely above the positive electrode of the battery pack.

[0006] Further, the switching structure comprises a locking cylinder, the inside of the locking cylinder is hollow, a crack groove is formed on the upper surface of the locking cylinder, the crack groove is connected with the hollow inside of the locking cylinder, a reciprocating column is arranged in the hollow inside of the locking cylinder, a sliding block is fixedly connected to the upper surface of the reciprocating column, the sliding block is located in the crack groove on the upper surface of the locking cylinder, a threaded column is arranged above the locking cylinder, the threaded column penetrates through the sliding block, the threaded column is in threaded engagement with the sliding block, and a stepping motor is further fixedly connected to one end of the threaded column.

[0007] Further, the lower surface of the locking cylinder is uniformly provided with switching cylinders, the inside of each switching cylinder is hollow, the upper end of each switching cylinder is connected with the hollow inside of the locking cylinder, a lifting column and a lifting spring are arranged in the hollow inside of each switching cylinder, the upper end of the lifting column is in arc shape, the lifting spring is located on the surface of the lifting column, an arc-shaped recess is formed on the surface of each switching cylinder, a rotating column is arranged in the arc-shaped recess of each switching cylinder, and one end of the rotating column is fixedly connected to the surface of the lifting column.

[0008] Further, a communication sheet is further fixedly connected to the lower surface of the lifting column, a wedge-shaped column is fixedly connected to the lower end of the lifting column, and a wheel rotating cylinder is further arranged below the lifting column.

[0009] Further, a recess is oppositely arranged on the inner wall of the wheel rotating cylinder, an ejection spring is arranged in the recess of the wheel rotating cylinder, a charging block is arranged in the recess on one side of the inner wall of the wheel rotating cylinder, an electric cable is connected between the charging block and the communication sheet, a discharging block is arranged in the recess on the other side of the inner wall of the wheel rotating cylinder, the discharging block is connected with a power supply end VGD of an electric shovel through the electric cable, and a detection circuit is arranged on the electric cable between the discharging block and the power supply end VGD of the electric shovel.

[0010] Further, the detection circuit comprises a chip U1, the chip U1 is an integrated operational amplifier, the model of the chip U1 is CA3130, the 2-pin of the chip U1 is connected with the power supply end VGD of the electric shovel, the 3-pin of the chip U1 is connected with one end of a resistor R4 and one end of a resistor R5, the other end of the resistor R4 is connected with a power supply +48V, the other end of the resistor R5 is connected with a ground wire, the 4-pin of the chip U1 is connected with the ground wire, the 8-pin of the chip U1 is connected with a power supply +5V, the 1-pin of the chip U1 is connected with one end of a resistor R1, and the other end of the resistor R1 is connected with the 3-pin of a chip U2 and one end of a capacitor C1.

[0011] Further, the chip U2 is an integrated operational amplifier, the 4-pin of the chip U2 is connected with the ground wire, the 8-pin of the chip U2 is connected with the power supply +5V, the model of the chip U2 is CA3130, the other end of the capacitor C1 is connected with the 1-pin of the chip U2 and one end of a resistor R2, the other end of the resistor R2 is connected with the 1-pin of a chip U3, the chip U3 is an optical coupler, the model of the chip U3 is TLP521, the 2-pin of the chip U3 is connected with the ground wire, one end of a resistor R3 is connected with the 3-pin of the chip U3, the other end of the resistor R3 is connected with a power supply +24V, and the 4-pin of the chip U3 is connected with a stepping motor starting signal VDJ.

[0012] Further, the detection circuit further comprises a chip U4, the chip U4 is an integrated operational amplifier, the model of the chip U4 is LM324, one end of a resistor R6 and one end of a resistor R7 are connected to the 5th pin of the chip U4, the other end of the resistor R6 is connected to a power supply +48V, the other end of the resistor R7 is connected to a ground wire, the positive electrode of a battery XDC and the positive electrode of a diode D1 are connected to the 6th pin of the chip U4, the negative electrode of the diode D1 is connected to a power supply end VGD of the electric shovel carrier, the negative electrode of the battery XDC and the 11th pin of the chip U4 are connected to a ground wire, and the 4th pin of the chip U4 is connected to a power supply +5V.

[0013] Further, one end of a resistor R8 is connected to the 7th pin of the chip U4, the other end of the resistor R8 is connected to the 2nd pin of a chip U5 and one end of a capacitor C2, the chip U5 is an integrated operational amplifier, the model of the chip U5 is TLC27M2, the other end of the capacitor C2 is connected to the 1st pin of the chip U5 and an alarm signal BJ, one end of a resistor R9 is connected to the 3rd pin of the chip U5, the other end of the resistor R9 is connected to a ground wire, the 4th pin of the chip U5 is connected to a ground wire, and a power supply +5V is connected to the 8th pin of the chip U5.

[0014] Compared with the prior art, the above technical scheme has the following technical effects: 1、The battery pack and the switching structure are arranged, the switching structure comprises a locking cylinder, a reciprocating column is arranged in the locking cylinder, and switching cylinders are uniformly arranged below the locking cylinder, a rotating cylinder is arranged below the switching cylinder, a recess is oppositely arranged on the inner wall of the rotating cylinder, a charging block and a discharging block are arranged in the recess of the rotating cylinder, through the reciprocating operation of the reciprocating column in the locking cylinder, the charging block and the discharging block can be sequentially connected with the positive electrode of the battery in the battery pack, in this way, the batteries in the battery pack can automatically switch between charging and discharging while meeting the power supply of the electric shovel carrier, and the working time of the electric shovel carrier and the charging efficiency of the batteries are improved.

[0015] 2、The detection circuit is further arranged, the detection circuit comprises the chip U4 and the chip U5, when the battery supplies power to the power supply end VGD of the electric shovel carrier, the integral circuit composed of the chip U5 can detect the discharging time of the battery, the battery that cannot reach the set discharging time is externally alarmed and transmitted, a replacement signal is sent, and the utilization rate of the battery is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the specific embodiments or the prior art, the drawings needed to be used in the specific embodiments or the prior art description will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual proportion and position.

[0017] Figure 1 It is a structural connection schematic diagram of the application. Figure 2 The connection diagram of the switching structure is shown in the front view of the structure of the present application. Figure 3 The connection diagram of the switching structure is shown in the side view of the structure of the present application. Figure 4 The connection principle of the detection circuit of the present application Figure 1 ; Figure 5 The connection principle of the detection circuit of the present application Figure 2 .

[0018] Figure 1 、 Figure 2 And Figure 3 : 1 - electric shovel, 2 - photovoltaic module, 3 - battery pack, 4 - negative bus bar, 5 - positive bus bar, 6 - locking cylinder, 7 - reciprocating column, 8 - switching cylinder, 9 - lifting column, 10 - lifting spring, 11 - rotating column, 12 - wedge-shaped column, 13 - charging block, 14 - discharging block, 15 - ejection spring, 16 - threaded column, 17 - sliding block, 18 - stepper motor, 19 - wheel cylinder, 20 - switching structure, 21 - communication sheet. DETAILED DESCRIPTION

[0019] As Figure 1 、 Figure 2 And Figure 3 shown, a battery-powered automatic switching system for an electric shovel includes an electric shovel 1, a photovoltaic module 2 is erected above the electric shovel 1, a battery pack 3 is arranged in the middle of the electric shovel 1, the battery pack 3 is composed of a plurality of identical batteries, a switching structure 20 is arranged above the battery pack 3, and a negative bus bar 4 and a positive bus bar 5 are also arranged in the electric shovel 1, the negative bus bar 4 and the positive bus bar 5 are connected to the photovoltaic module 2 through a cable, the negative bus bar 4 is fixedly connected to the negative electrode of the battery pack 3, and the positive bus bar 5 is located obliquely above the positive electrode of the battery pack 3.

[0020] The switching structure 20 includes a locking cylinder 6, the inside of the locking cylinder 6 is hollow, a split groove is formed on the upper surface of the locking cylinder 6, the split groove on the upper surface of the locking cylinder 6 is in communication with the hollow inside of the locking cylinder 6, a reciprocating column 7 is arranged in the hollow inside of the locking cylinder 6, a sliding block 17 is fixedly connected to the upper surface of the reciprocating column 7, the sliding block 17 is located in the split groove on the upper surface of the locking cylinder 6, a threaded column 16 is arranged above the locking cylinder 6, the threaded column 16 penetrates through the sliding block 17, the threaded column 16 is engaged with the sliding block 17 through threads, one end of the threaded column 16 is also fixedly connected to a stepper motor 18, and the stepper motor 18 is used for rotating the threaded column 16.

[0021] The lower surface of the locking cylinder 6 is also uniformly distributed with switching cylinders 8. Since the structures and functions of the switching cylinders 8 are the same, only one is taken as an example below. The switching cylinder 8 is hollow inside. The upper end of the switching cylinder 8 is connected with the hollow of the locking cylinder 6. The hollow inside of the switching cylinder 8 is provided with a lifting column 9 and a lifting spring 10. The upper end of the lifting column 9 is arc-shaped. The lifting spring 10 is located on the surface of the lifting column 9. The surface of the switching cylinder 8 is also provided with an arc-shaped groove. The arc-shaped groove of the switching cylinder 8 is provided with a rotating column 11. One end of the rotating column 11 is fixedly connected to the surface of the lifting column 9.

[0022] The lower surface of the lifting column 9 is also fixedly connected with a communication sheet 21. The lower end of the lifting column 9 is fixedly connected with a wedge-shaped column 12. The lower part of the lifting column 9 is also provided with a wheel rotating cylinder 19. The wheel rotating cylinder 19 is hollow inside. The wheel rotating cylinder 19 is located at the positive electrode of the battery pack 3. The inner wall of the wheel rotating cylinder 19 does not contact the positive electrode of the battery pack 3. The inner wall of the wheel rotating cylinder 19 is oppositely provided with a recess. The recess of the wheel rotating cylinder 19 is provided with an ejection spring 15. The recess of the inner wall of the wheel rotating cylinder 19 is provided with a charging block 13. The charging block 13 is connected with the communication sheet 21 through a cable. The recess of the inner wall of the wheel rotating cylinder 19 is provided with a discharging block 14. The discharging block 14 is connected with the power supply end VGD of the electric shovel carrier 1 through a cable. The cable between the discharging block 14 and the power supply end VGD of the electric shovel carrier 1 is provided with a detection circuit.

[0023] As shown in Figure 4 The detection circuit has multiple groups. Since the structures and functions are the same, only one group is taken as an example below. The detection circuit includes a chip U1. The chip U1 is an integrated operational amplifier. The model of the chip U1 is CA3130. The 2-pin of the chip U1 is connected with the power supply end VGD of the electric shovel carrier. The 3-pin of the chip U1 is connected with one end of a resistor R4 and one end of a resistor R5. The other end of the resistor R4 is connected with a power supply +48V. The other end of the resistor R5 is connected with a ground wire. The 4-pin of the chip U1 is connected with a ground wire. The 8-pin of the chip U1 is connected with a power supply +5V. The 1-pin of the chip U1 is connected with one end of a resistor R1. The other end of the resistor R1 is connected with the 3-pin of a chip U2 and one end of a capacitor C1. The chip U2 is an integrated operational amplifier. The 4-pin of the chip U2 is connected with a ground wire. The 8-pin of the chip U2 is connected with a power supply +5V. The model of the chip U2 is CA3130. The other end of the capacitor C1 is connected with the 1-pin of the chip U2 and one end of a resistor R2. The other end of the resistor R2 is connected with the 1-pin of a chip U3. The chip U3 is an optical coupler. The model of the chip U3 is TLP521. The 2-pin of the chip U3 is connected with a ground wire. The 3-pin of the chip U3 is connected with one end of a resistor R3. The other end of the resistor R3 is connected with a power supply +24V. The 4-pin of the chip U3 is connected with a step motor starting signal VDJ.

[0024] The 2-pin of the chip U1 collects the VGD voltage signal of the power supply end of the electric shovel, the 3-pin of the chip U1 collects the voltage on the upper end of the resistor R5, when the voltage of the 2-pin of the chip U1 is less than the voltage of the 3-pin of the chip U1, it indicates that the actual VGD voltage of the power supply end of the electric shovel is less than the set working value, the 1-pin of the chip U1 outputs a high level, the integral circuit composed of the chip U2 is connected, the chip U3 is turned on, the starting signal VDJ of the stepping motor is connected with the power supply +24V, and the stepping motor starts to rotate.

[0025] The stepping motor rotates to drive the sliding block and the reciprocating column to move from one end of the locking cylinder to the other end. Normally, the lifting column is lifted to the hollow inside of the locking cylinder under the action of the lifting spring, the upper surface of the communication sheet is in contact with the lower surface of the positive busbar, the planar part of the wedge-shaped column at the lower end of the lifting column is tightly attached to the inner wall of the rotating cylinder of the discharge block, the discharge block is pressed into the recess of the rotating cylinder, the discharge block is separated from the positive electrode of the storage battery, conversely, the charging block is popped out of the spring from the recess of the rotating cylinder, the charging block is in contact with the positive electrode of the storage battery, and the electricity generated by the photovoltaic module supplements the electric energy of the storage battery in the storage battery pack through the charging block. When the front end of the reciprocating column meets the upper end of the lifting column extending into the hollow inside of the locking cylinder, the lifting column is caused to move downward along the switching cylinder, and the rotating column moves downward along the arc-shaped groove of the switching cylinder, so that the lifting column moves downward while rotating by 180 degrees, the upper surface of the communication sheet is separated from the lower surface of the positive busbar, the planar part of the wedge-shaped column at the lower end of the lifting column rotates by 180 degrees and is tightly attached to the inner wall of the rotating cylinder of the charging block, the charging block is pressed into the recess of the rotating cylinder, the charging block is separated from the positive electrode of the storage battery, conversely, the discharge block is popped out of the spring from the recess of the rotating cylinder, the discharge block is in contact with the positive electrode of the storage battery, and the storage battery below the lifting column supplies power to the electric shovel.

[0026] If the voltage of the 2-pin of the chip U1 is still less than the voltage of the 3-pin of the chip U1 at this moment, the chip U1, the chip U2 and the chip U3 continue to be turned on, the stepping motor continues to rotate, the sliding block and the reciprocating column continue to move into the locking cylinder, and the storage battery below the other lifting column continues to drive the storage battery to supply power to the electric shovel. Conversely, when the voltage of the 2-pin of the chip U1 is greater than the voltage of the 3-pin of the chip U1, it indicates that the VGD voltage of the power supply end of the electric shovel at this moment is greater than the set working value, and the working number of the storage batteries in the storage battery pack meets the actual operation of the electric shovel. In this way, the storage batteries in the storage battery pack can automatically switch between charging and discharging while meeting the power supply of the electric shovel.

[0027] As Figure 5As shown, the detection circuit further comprises a chip U4, which is an integrated operational amplifier, the model of the chip U4 is LM324, one end of a resistor R6 and one end of a resistor R7 are connected to the 5th pin of the chip U4, the other end of the resistor R6 is connected to a power supply +48V, the other end of the resistor R7 is connected to a ground wire, the positive electrode of a storage battery XDC and the positive electrode of a diode D1 are connected to the 6th pin of the chip U4, the negative electrode of the diode D1 is connected to a power supply end VGD of the electric shovel, the negative electrode of the storage battery XDC and the 11th pin of the chip U4 are connected to a ground wire, the 4th pin of the chip U4 is connected to a power supply +5V, one end of a resistor R8 is connected to the 7th pin of the chip U4, the other end of the resistor R8 is connected to the 2nd pin of a chip U5 and one end of a capacitor C2, the chip U5 is an integrated operational amplifier, the model of the chip U5 is TLC27M2, the other end of the capacitor C2 is connected to the 1st pin of the chip U5 and an alarm signal BJ, one end of a resistor R9 is connected to the 3rd pin of the chip U5, the other end of the resistor R9 is connected to a ground wire, the 4th pin of the chip U5 is connected to a ground wire, and the 8th pin of the chip U5 is connected to a power supply +5V.

[0028] The diode D1 is unidirectional, which isolates the influence of the voltage of the power supply end VGD of the electric shovel on the voltage value of the storage battery XDC, when the storage battery XDC supplies power to the power supply end VGD of the electric shovel through the diode D1, the positive electrode voltage of the storage battery XDC gradually decreases, the voltage of the 5th pin of the chip U4 is higher than the voltage of the 6th pin of the chip U4, the integral circuit composed of the chip U5 is turned on, the 1st pin of the chip U5 outputs a high level to the outside to alarm, which indicates the discharge time of the storage battery XDC, and the capacity of the storage battery XDC is good, otherwise, the discharge time of the storage battery XDC cannot reach the set discharge time, which proves that the capacity of the storage battery XDC is poor and needs to be replaced in time.

[0029] The description of the present application is given for the purpose of illustration and description, and is not exhaustive or limiting to the present application. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are chosen and described in order to best explain the principles of the present application and its practical application, and to enable others skilled in the art to understand the present application for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. A battery powered automatic switching system for a shovel machine, characterized by: The utility model provides an electric shovel, the electric shovel is provided with a photovoltaic module (2) on the top, a battery pack (3) is arranged in the middle of the electric shovel, a switching structure (20) is arranged on the top of the battery pack (3), a negative busbar (4) and a positive busbar (5) are further arranged in the electric shovel, the negative busbar (4) and the positive busbar (5) are connected with the photovoltaic module (2) through cables, the negative busbar (4) is fixedly connected with the negative electrode of the battery pack (3), and the positive busbar (5) is located obliquely above the positive electrode of the battery pack (3).

2. A battery powered automatic switching system for a shovel power plant as set forth in claim 1, wherein: The switching structure (20) comprises a locking cylinder (6), the locking cylinder (6) is hollow, a slot is formed in the upper surface of the locking cylinder (6), the slot in the upper surface of the locking cylinder (6) is communicated with the hollow in the locking cylinder (6), a reciprocating column (7) is arranged in the hollow of the locking cylinder (6), a sliding block (17) is fixedly connected to the upper surface of the reciprocating column (7), the sliding block (17) is arranged in the slot in the upper surface of the locking cylinder (6), a threaded column (16) is arranged above the locking cylinder (6), the threaded column (16) penetrates through the sliding block (17), the threaded column (16) is engaged with the sliding block (17) through threads, and one end of the threaded column (16) is further fixedly connected with a stepping motor (18).

3. A battery powered automatic switching system for a shovel power plant as set forth in claim 2, wherein: The lower surface of the locking cylinder (6) is further uniformly provided with switching cylinders (8), the switching cylinders (8) are hollow, the upper ends of the switching cylinders (8) are communicated with the hollow of the locking cylinder (6), a lifting column (9) and a lifting spring (10) are arranged in the hollow of each switching cylinder (8), the upper end of the lifting column (9) is in an arc shape, the lifting spring (10) is arranged on the surface of the lifting column (9), an arc-shaped groove is further formed in the surface of each switching cylinder (8), a rotating column (11) is arranged in the arc-shaped groove of each switching cylinder (8), and one end of the rotating column (11) is fixedly connected to the surface of the lifting column (9).

4. A battery powered automatic switching system for a shovel power plant as set forth in claim 3, wherein: The lower surface of the lifting column (9) is further fixedly connected with a communication sheet (21), the lower end of the lifting column (9) is fixedly connected with a wedge-shaped column (12), and a rotating cylinder (19) is further arranged below the lifting column (9).

5. A battery powered automatic switching system for a shovel power plant as set forth in claim 4, wherein: The inner wall of the rotating cylinder (19) is provided with recesses in opposite positions, the recesses in the rotating cylinder (19) are provided with ejecting springs (15), one side of the inner wall of the rotating cylinder (19) is provided with a charging block (13) in a recess, the charging block (13) is connected with the communication sheet (21) through a cable, the other side of the inner wall of the rotating cylinder (19) is provided with a discharging block (14) in a recess, the discharging block (14) is connected with a power supply end VGD of the electric shovel (1) through a cable, and a detection circuit is arranged on the cable between the discharging block (14) and the power supply end VGD of the electric shovel (1).

6. A battery powered automatic switching system for a shovel power plant as set forth in claim 5, wherein: The detection circuit comprises a chip U1, the chip U1 is an integrated operational amplifier, the model of the chip U1 is CA3130, the 2th pin of the chip U1 is connected with the power supply end VGD of the electric shovel, the 3th pin of the chip U1 is connected with one end of a resistor R4 and one end of a resistor R5, the other end of the resistor R4 is connected with a power supply +48V, the other end of the resistor R5 is connected with a ground wire, the 4th pin of the chip U1 is connected with the ground wire, the 8th pin of the chip U1 is connected with a power supply +5V, the 1st pin of the chip U1 is connected with one end of a resistor R1, and the other end of the resistor R1 is connected with the 3th pin of a chip U2 and one end of a capacitor C1.

7. A battery powered automatic switching system for a shovel power plant as set forth in claim 6, wherein: Chip U2 is an integrated operational amplifier, chip U2 of 4 feet have ground wire, chip U2 of 8 feet have power supply +5V, chip U2 model is CA3130, the other end of capacitor C1 is connected with chip U2 of 1 feet and resistance R2 one end, resistance R2 other end is connected with chip U3 of 1 feet, chip U3 is optocoupler, chip U3 model is TLP521, chip U3 of 2 feet have ground wire, chip U3 of 3 feet have resistance R3 one end, resistance R3 other end is connected with power supply +24V, chip U3 of 4 feet have step motor start signal VDJ.

8. A battery powered automatic switching system for a shovel power plant as set forth in claim 5, wherein: The detection circuit further comprises chip U4, chip U4 is an integrated operational amplifier, chip U4 model is LM324, chip U4 of 5 feet have resistance R6 one end and resistance R7 one end, resistance R6 other end is connected with power supply +48V, resistance R7 other end is connected with ground wire, chip U4 of 6 feet have battery XDC positive and diode D1 positive, diode D1 negative is connected with power shovel carrier power supply end VGD, battery XDC negative and chip U4 of 11 feet have ground wire, chip U4 of 4 feet have power supply +5V.

9. A battery powered automatic switching system for a shovel power plant as set forth in claim 8, wherein: Chip U4 of 7 feet have resistance R8 one end, resistance R8 other end is connected with chip U5 of 2 feet and capacitor C2 one end, chip U5 is an integrated operational amplifier, chip U5 model is TLC27M2, capacitor C2 other end is connected with chip U5 of 1 feet and alarm signal BJ, chip U5 of 3 feet have resistance R9 one end, resistance R9 other end is connected with ground wire, chip U5 of 4 feet have ground wire, chip U5 of 8 feet have power supply +5V.

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