Direct current screen capable of detecting internal resistance of battery and system insulation

Abstract

The utility model relates to the field of battery internal resistance detection, in particular to a direct current screen capable of detecting battery internal resistance and system insulation, which comprises a direct current screen body. A bottom plate is fixedly connected to the lower end of the DC screen body, first groove bodies penetrate through the left and right ends of the DC screen body, first bearing plates are fixedly connected to the bottom surfaces of the inner walls of the first groove bodies, and adjustable rheostats are placed at the upper ends of the first bearing plates. By arranging the rebound mechanism, when current or voltage is too large, the first electric cylinder is started to enable the output shaft of the first electric cylinder to extend out of the groove, and the spring which is originally in a compressed state jacks up the sliding block and drives the second electric cylinder, the fixing block and the third bearing plate to move upwards; the outer walls of the first insulating cylinder and the second insulating cylinder are made of insulating materials, so that the insulating protection of the device can be improved.

Description

Technical Field

[0001] The utility model belongs to the field of battery internal resistance detection, and in particular relates to a DC screen capable of detecting battery internal resistance and system insulation. Background Art

[0002] With the development of new energy technologies such as electric vehicles and energy storage systems, the requirements for battery safety and reliability are constantly increasing. Battery internal resistance and system insulation are important indicators that affect battery performance and safety. After the battery is produced, the battery internal resistance needs to be tested.

[0003] At present, the utility model with patent number CN202222267238.3 discloses an online detection device for the internal resistance of a battery, including a base plate, the top of the base plate is hot-melt connected to a frame, and a fixed component is installed on the surface of the frame. The utility model solves the problem that traditional DC systems can only measure the voltage of the battery online, but cannot measure the internal resistance of the battery online, and it takes a lot of manpower, material resources and time to detect the internal resistance of the battery. The utility model replaces the original battery with an adjustable resistor and adjusts it to the same voltage to match the ammeter readings, thereby realizing rapid online detection of the internal resistance of the battery. However, the conductive sheet of the device is exposed to the outside world, and there is a risk of leakage during manual operation. The DC screen in the prior art is difficult to quickly detect the internal resistance of the battery, and it is difficult to improve the insulation of the system during detection, and the protection of the voltmeter cannot be improved.

[0004] Therefore, a DC screen with the function of detecting battery internal resistance and system insulation is proposed, which can quickly detect the battery internal resistance, improve the insulation of the system during detection, and improve the protection of the voltmeter. Utility Model Content

[0005] In order to overcome the problems in the prior art that the DC screen is difficult to quickly detect the internal resistance of the battery, and it is difficult to improve the insulation of the system during detection and the protection of the voltmeter, a DC screen with the function of detecting the internal resistance of the battery and the insulation of the system is proposed.

[0006] The technical scheme of the utility model is as follows: a DC screen with the function of detecting battery internal resistance and system insulation, comprising a DC screen body; a bottom plate is fixedly connected to the lower end of the DC screen body, a first slot body is penetrated through the left and right ends of the DC screen body, a first bearing plate is fixedly connected to the bottom surface of the inner wall of the first slot body, an adjustable rheostat is placed on the upper end of the first bearing plate, a lifting mechanism is arranged at the rear end of the DC screen body, a second limit block and a fixed plate are arranged on the lifting mechanism, a second limit block is fixedly connected to the left end of the second limit block, a first electric cylinder is fixedly connected to the upper end of the second bearing plate, a rebound mechanism is arranged at the left end of the DC screen body, and the rebound mechanism comprises a second bearing block, a spring and a slider; a second bearing block is fixedly connected to the left end of the DC screen body, a guide column and a spring are fixedly connected to the upper end of the second bearing block, a slider is fixedly connected to the upper end of the spring, a second through hole is penetrated through the upper end of the slider, the inner wall of the second through hole is fitted with the side wall of the guide column, two grooves are arranged at the rear end of the slider, the grooves are matched with the output shaft of the first electric cylinder, and the upper end of the slider is penetrated A second electric cylinder is fixedly connected in a through-type manner, a fixed block is fixedly connected to the lower end of the output shaft of the second electric cylinder, a third bearing plate is fixedly connected to the lower end of the fixed block, a voltmeter is fixedly connected to the upper end of the third bearing plate, a positive conductive plug post and a negative conductive plug post are fixedly connected to the lower end of the third bearing plate, the positive conductive plug post and the negative conductive plug post are electrically connected to the positive and negative poles of the voltmeter respectively, a detection mechanism is provided at the upper end of the lifting plate, the detection mechanism includes an ammeter and a custom resistor, a fixed plate is fixedly connected to the upper end of the lifting plate, and the upper end of the fixed plate is fixedly connected to There are an ammeter and a customized resistor, the front end of the lifting plate is fixedly connected with a first insulating tube and a second insulating tube, the lower end of the first insulating tube is provided with a second slot body, the lower end of the second insulating tube is provided with a third slot body, the inner wall of the first insulating tube is fixedly connected with a first conductive sheet, the inner wall of the second insulating tube is fixedly connected with a second conductive sheet, the upper end of the first insulating tube is provided with a positive conductive slot, the upper end of the second insulating tube is provided with a negative conductive slot, the positive conductive column is adapted to the positive conductive slot, and the negative conductive column is adapted to the negative conductive slot.

[0007] Preferably, when in use, the battery to be tested is placed on the upper end of the first supporting plate, so that the positive and negative poles of the battery to be tested are located directly below the second slot body and the third slot body, and then the lifting mechanism is turned on to move the second limit block and the fixing plate downward, so that the positive conductive plug-in column extends into the inner wall of the positive conductive slot, and the negative conductive plug-in column extends into the inner wall of the negative conductive slot, and at the same time, the positive and negative poles of the battery to be tested are respectively attached to the lower ends of the first conductive sheet and the second conductive sheet. At this time, the battery to be tested, the ammeter and the custom resistor are connected in series, and the voltmeter is connected in parallel with the battery to be tested, the values ​​of the ammeter and the voltmeter are recorded, and then the battery to be tested is removed and the power supply is stopped;

[0008] Move the adjustable rheostat to the position of the battery to be tested, start the lifting mechanism again to move the second limit block and the fixing plate downward, so that the positive and negative poles of the adjustable rheostat are respectively attached to the lower ends of the first conductive sheet and the second conductive sheet, connect the adjustable rheostat to the circuit to replace the battery to be tested, and make the value of the voltmeter the same as the voltage when the battery to be tested is detected under the action of the adjustable voltage power supply, and then turn on the adjustable rheostat to adjust the resistance value in the circuit. When the value of the ammeter is the same as the voltage detected for the battery to be tested, the value displayed by the adjustable rheostat is the internal resistance of the battery to be tested;

[0009] When the current or voltage is too large, the first electric cylinder is turned on so that the output shaft of the first electric cylinder extends out from the groove, and the spring originally in a compressed state will push the slider upward, which will drive the second electric cylinder, the fixed block and the third supporting plate to move upward, thereby allowing the positive conductive plug and the negative conductive plug to be quickly moved out of the positive conductive slot and the negative conductive slot, thereby improving the protection of the voltmeter and solving the problems in the prior art that the DC screen is difficult to quickly detect the internal resistance of the battery, and it is difficult to improve the insulation of the system during detection, and the protection of the voltmeter cannot be improved.

[0010] Preferably, the lifting mechanism includes a first bearing block, a motor, a threaded column, a first threaded sleeve and a lifting plate; the first bearing block is fixedly connected to the upper rear end of the DC screen body, the upper end of the first bearing block is fixedly connected to the motor, the lower end of the output shaft of the motor passes through the first bearing block and is fixedly connected to the threaded column, the side wall of the threaded column is threadedly mounted with the first threaded sleeve, the side wall of the first threaded sleeve is fixedly connected to the lifting plate, the end of the first threaded sleeve close to the DC screen body is fixedly connected to the second limit block, the front end of the second limit block is fitted with the rear end of the DC screen body, and the upper end of the lifting plate is fixedly connected to a fixed plate.

[0011] Preferably, a bearing is fixed to the upper end of the base plate, the outer wall of the lower end of the threaded column is rotatably mounted on the inner wall of the bearing, two guide rods are fixed to the upper end of the base plate, and two first through holes are penetrated through the upper end of the lifting plate, and the inner wall of the first through hole is in contact with the side wall of the guide rod.

[0012] Preferably, two first limit blocks are fixedly connected to the upper end of the first supporting plate, and ends of the two first limit blocks close to each other fit with the front and rear ends of the adjustable resistor.

[0013] Preferably, the adjustable rheostat is provided with a rheostat positive terminal and a rheostat negative terminal.

[0014] Preferably, the first insulating cylinder and the custom resistor are electrically connected via a wire, and the custom resistor and the ammeter are electrically connected via a wire.

[0015] Preferably, the ammeter is electrically connected to the second insulating tube, and outer walls of the first insulating tube and the second insulating tube are both made of insulating materials.

[0016] The beneficial effects of the utility model are as follows: by placing the battery to be tested on the upper end of the first supporting plate, the positive and negative poles of the battery to be tested are located directly below the second slot body and the third slot body, and then the lifting mechanism is turned on to move the second limit block and the fixing plate downward, so that the positive conductive plug-in column extends into the inner wall of the positive conductive slot, and the negative conductive plug-in column extends into the inner wall of the negative conductive slot, and at the same time, the positive and negative poles of the battery to be tested are respectively attached to the lower ends of the first conductive sheet and the second conductive sheet. At this time, the battery to be tested, the ammeter and the custom resistor are connected in series, the voltmeter is connected in parallel with the battery to be tested, the values ​​of the ammeter and the voltmeter are recorded, and then the battery to be tested is removed and the power supply is stopped;

[0017] Move the adjustable rheostat to the position of the battery to be tested, start the lifting mechanism again to move the second limit block and the fixing plate downward, so that the positive and negative poles of the adjustable rheostat are respectively attached to the lower ends of the first conductive sheet and the second conductive sheet, connect the adjustable rheostat to the circuit to replace the battery to be tested, and make the value of the voltmeter the same as the voltage when the battery to be tested is detected under the action of the adjustable voltage power supply, and then turn on the adjustable rheostat to adjust the resistance value in the circuit. When the value of the ammeter is the same as the voltage detected for the battery to be tested, the value displayed by the adjustable rheostat is the internal resistance of the battery to be tested;

[0018] When the current or voltage is too large, the first electric cylinder is turned on so that the output shaft of the first electric cylinder extends out from the groove, and the spring originally in a compressed state will push the slider upward, which will drive the second electric cylinder, the fixed block and the third supporting plate to move upward, so that the positive conductive plug and the negative conductive plug are quickly moved out of the positive conductive slot and the negative conductive slot, which can improve the protection of the voltmeter. The outer walls of the first insulating cylinder and the second insulating cylinder are made of insulating materials, which can improve the insulation protection of the device and reduce the risk of electric shock. This solves the problem that the DC screen in the prior art is difficult to quickly detect the internal resistance of the battery, and it is difficult to improve the insulation of the system during detection, and the protection of the voltmeter cannot be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The three-dimensional structure schematic diagram of a DC screen capable of detecting battery internal resistance and system insulation of the utility model is shown;

[0020] Figure 2 The three-dimensional structure schematic diagram of an adjustable rheostat with a DC screen for detecting battery internal resistance and system insulation of the utility model is shown;

[0021] Figure 3 The three-dimensional structure schematic diagram of the lifting mechanism of a DC screen capable of detecting battery internal resistance and system insulation of the utility model is shown;

[0022] Figure 4Shown is a three-dimensional structural schematic diagram of a first electric cylinder with a DC screen for detecting battery internal resistance and system insulation of the utility model;

[0023] Figure 5 The three-dimensional structure schematic diagram of the rebound mechanism of a DC screen capable of detecting battery internal resistance and system insulation of the utility model is shown;

[0024] Figure 6 The first three-dimensional structural schematic diagram of a detection mechanism of a DC screen capable of detecting battery internal resistance and system insulation of the utility model is shown;

[0025] Figure 7 Shown is a second three-dimensional structural schematic diagram of a detection mechanism of a DC screen capable of detecting battery internal resistance and system insulation according to the utility model.

[0026] The marks in the attached drawings are: 1, DC screen body; 2, bottom plate; 3, first trough; 4, first bearing plate; 5, adjustable rheostat; 501, positive terminal of rheostat; 502, negative terminal of rheostat; 6, lifting mechanism; 601, first bearing block; 602, motor; 603, threaded column; 604, first threaded sleeve; 605, lifting plate; 606, bearing; 607, guide rod; 608, first through hole; 7, first limit block; 8, second limit block; 9, second bearing plate; 10, first electric cylinder; 11, second Carrying block; 12. Guide column; 13. Spring; 14. Slider; 15. Second through hole; 16. Groove; 17. Second electric cylinder; 18. Fixed block; 19. Third carrying plate; 20. Voltmeter; 21. Positive conductive plug post; 22. Negative conductive plug post; 23. Fixed plate; 24. Ammeter; 25. Custom resistor; 26. First insulating cylinder; 27. Second insulating cylinder; 28. Second slot body; 29. ​​Third slot body; 30. First conductive sheet; 31. Second conductive sheet; 32. Positive conductive slot; 33. Negative conductive slot. DETAILED DESCRIPTION

[0027] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0028] See also Figure 1-Figure 7The utility model provides an embodiment: a DC screen with the function of detecting battery internal resistance and system insulation, comprising a DC screen body 1; a bottom plate 2 is fixedly connected to the lower end of the DC screen body 1, a first slot 3 is penetrated and opened at the left and right ends of the DC screen body 1, a first bearing plate 4 is fixedly connected to the bottom surface of the inner wall of the first slot 3, an adjustable rheostat 5 is placed on the upper end of the first bearing plate 4, a lifting mechanism 6 is arranged at the rear end of the DC screen body 1, a second limit block 8 and a fixing plate 23 are arranged on the lifting mechanism 6, a second limit block 8 is fixedly connected to the left end of the second limit block 8, and a first electric cylinder 1 is fixedly connected to the upper end of the second bearing plate 9 0, a rebound mechanism is provided at the left end of the DC screen body 1, and the rebound mechanism includes a second bearing block 11, a spring 13 and a slider 14; the left end of the DC screen body 1 is fixedly connected to the second bearing block 11, the upper end of the second bearing block 11 is fixedly connected to the guide column 12 and the spring 13, the upper end of the spring 13 is fixedly connected to the slider 14, the upper end of the slider 14 is penetrated by a second through hole 15, the inner wall of the second through hole 15 is fitted with the side wall of the guide column 12, the rear end of the slider 14 is provided with two grooves 16, the grooves 16 are adapted to the output shaft of the first electric cylinder 10, and the upper end of the slider 14 is penetrated by a second electric cylinder 17 The lower end of the output shaft of the second electric cylinder 17 is fixedly connected to a fixed block 18, the lower end of the fixed block 18 is fixedly connected to a third carrier plate 19, the upper end of the third carrier plate 19 is fixedly connected to a voltmeter 20, the lower end of the third carrier plate 19 is fixedly connected to a positive conductive plug 21 and a negative conductive plug 22, the positive conductive plug 21 and the negative conductive plug 22 are respectively electrically connected to the positive and negative poles of the voltmeter 20, the upper end of the lifting plate 605 is provided with a detection mechanism, the detection mechanism includes an ammeter 24 and a custom resistor 25, the upper end of the lifting plate 605 is fixedly connected to a fixed plate 23, the upper end of the fixed plate 23 is fixedly connected to the ammeter 24 and the custom resistor 25 The resistor 25, the front end of the lifting plate 605 is fixedly connected with the first insulating tube 26 and the second insulating tube 27, the lower end of the first insulating tube 26 is provided with a second slot 28, the lower end of the second insulating tube 27 is provided with a third slot 29, the inner wall of the first insulating tube 26 is fixedly connected with the first conductive sheet 30, the inner wall of the second insulating tube 27 is fixedly connected with the second conductive sheet 31, the upper end of the first insulating tube 26 is provided with a positive conductive slot 32, the upper end of the second insulating tube 27 is provided with a negative conductive slot 33, the positive conductive plug 21 is adapted to the positive conductive slot 32, and the negative conductive plug 22 is adapted to the negative conductive slot 33.

[0029] When in use, the battery to be tested is placed on the upper end of the first supporting plate 4, so that the positive and negative poles of the battery to be tested are located directly below the second slot body 28 and the third slot body 29, and then the lifting mechanism 6 is turned on to move the second limit block 8 and the fixing plate 23 downward, so that the positive conductive plug 21 extends into the inner wall of the positive conductive slot 32, and the negative conductive plug 22 extends into the inner wall of the negative conductive slot 33, and at the same time, the positive and negative poles of the battery to be tested are respectively attached to the lower ends of the first conductive sheet 30 and the second conductive sheet 31. At this time, the battery to be tested, the ammeter 24 and the custom resistor 25 are connected in series, and the voltmeter 20 is connected in parallel with the battery to be tested. The values ​​of the ammeter 24 and the voltmeter 20 are recorded, and then the battery to be tested is removed and the power supply is stopped;

[0030] Move the adjustable rheostat 5 to the position of the battery to be tested, start the lifting mechanism 6 again to move the second limit block 8 and the fixing plate 23 downward, so that the positive and negative poles of the adjustable rheostat 5 are respectively attached to the lower ends of the first conductive sheet 30 and the second conductive sheet 31, connect the adjustable rheostat 5 to the circuit to replace the battery to be tested, and under the action of the adjustable voltage power supply, make the value of the voltmeter 20 the same as the voltage when the battery to be tested is detected, and then turn on the adjustable rheostat 5 to adjust the resistance value in the circuit. When the value of the ammeter 24 is the same as the voltage of the battery to be tested, the value displayed by the adjustable rheostat 5 is the internal resistance of the battery to be tested;

[0031] When the current or voltage is too large, the first electric cylinder 10 is turned on so that the output shaft of the first electric cylinder 10 extends out from the groove 16, and the spring 13, which was originally in a compressed state, pushes the slider 14 upward, which will drive the second electric cylinder 17, the fixing block 18 and the third supporting plate 19 to move upward, so that the positive conductive plug 21 and the negative conductive plug 22 are quickly moved out of the positive conductive slot 32 and the negative conductive slot 33, thereby improving the protection of the voltmeter 20.

[0032] See also Figure 1 and Figure 3In the present embodiment, the lifting mechanism 6 comprises a first bearing block 601, a motor 602, a threaded column 603, a first threaded sleeve 604 and a lifting plate 605; the first bearing block 601 is fixedly connected to the upper rear end of the DC screen body 1, the motor 602 is fixedly connected to the upper end of the first bearing block 601, the lower end of the output shaft of the motor 602 passes through the first bearing block 601 and is fixedly connected to the threaded column 603, the side wall of the threaded column 603 is threadedly installed with the first threaded sleeve 604, the side wall of the first threaded sleeve 604 is fixedly connected to the lifting plate 605, the end of the first threaded sleeve 604 close to the DC screen body 1 is fixedly connected to the second limit block 8, the front end of the second limit block 8 is fitted with the rear end of the DC screen body 1, the upper end of the lifting plate 605 is fixedly connected to the fixed plate 23, when the lifting plate 605 needs to be lifted or lowered, the motor 602 is turned on to rotate the threaded column 603, and the first threaded sleeve 604 will move in the vertical direction along the side wall of the threaded column 603.

[0033] See also Figure 1 and Figure 3 In this embodiment, a bearing 606 is fixedly connected to the upper end of the base plate 2, and the outer wall of the lower end of the threaded column 603 is rotatably installed on the inner wall of the bearing 606. Two guide rods 607 are fixedly connected to the upper end of the base plate 2. Two first through holes 608 are penetrated through the upper end of the lifting plate 605. The inner wall of the first through hole 608 is in contact with the side wall of the guide rod 607. When the lifting plate 605 moves in the vertical direction, the first through hole 608 will be stably lifted and lowered along the side wall of the guide rod 607.

[0034] See also Figure 1 and Figure 2 In this embodiment, two first limit blocks 7 are fixedly connected to the upper end of the first supporting plate 4, and the ends of the two first limit blocks 7 that are close to each other are in contact with the front and rear ends of the adjustable resistor 5. When the adjustable resistor 5 is manually pushed to the left, the adjustable resistor 5 can move stably along the ends of the two first limit blocks 7 that are close to each other.

[0035] See also Figure 1 and Figure 2 In this embodiment, the adjustable rheostat 5 is provided with a rheostat positive terminal 501 and a rheostat negative terminal 502, which are convenient for electrical connection with the detection mechanism.

[0036] See also Figure 1 , Figure 6 and Figure 7 In this embodiment, the first insulating cylinder 26 and the custom resistor 25 are electrically connected via a wire, and the custom resistor 25 and the ammeter 24 are electrically connected via a wire, which facilitates quick connection of the circuit.

[0037] See also Figure 1 , Figure 6 and Figure 7In this embodiment, the ammeter 24 is electrically connected to the second insulating tube 27, and the outer walls of the first insulating tube 26 and the second insulating tube 27 are both made of insulating materials, which can improve the insulation protection of the device.

[0038] Working principle: First, place the battery to be tested on the upper end of the first supporting plate 4, so that the positive and negative poles of the battery to be tested are located directly below the second slot body 28 and the third slot body 29, then open the lifting mechanism 6 to move the second limit block 8 and the fixing plate 23 downward, so that the positive conductive plug 21 extends into the inner wall of the positive conductive slot 32, and the negative conductive plug 22 extends into the inner wall of the negative conductive slot 33, and at the same time, the positive and negative poles of the battery to be tested are respectively attached to the lower ends of the first conductive sheet 30 and the second conductive sheet 31. At this time, the battery to be tested, the ammeter 24 and the custom resistor 25 are connected in series, and the voltmeter 20 is connected in parallel with the battery to be tested. The values ​​of the ammeter 24 and the voltmeter 20 are recorded, and then the battery to be tested is removed and the power supply is stopped;

[0039] Move the adjustable rheostat 5 to the position of the battery to be tested, start the lifting mechanism 6 again to move the second limit block 8 and the fixing plate 23 downward, so that the positive and negative poles of the adjustable rheostat 5 are respectively attached to the lower ends of the first conductive sheet 30 and the second conductive sheet 31, connect the adjustable rheostat 5 to the circuit to replace the battery to be tested, and under the action of the adjustable voltage power supply, make the value of the voltmeter 20 the same as the voltage when the battery to be tested is detected, and then turn on the adjustable rheostat 5 to adjust the resistance value in the circuit. When the value of the ammeter 24 is the same as the voltage of the battery to be tested, the value displayed by the adjustable rheostat 5 is the internal resistance of the battery to be tested;

[0040] When the current or voltage is too large, the first electric cylinder 10 is turned on so that the output shaft of the first electric cylinder 10 extends out from the groove 16, and the spring 13, which was originally in a compressed state, will push the slider 14 upward, and will drive the second electric cylinder 17, the fixing block 18 and the third supporting plate 19 to move upward, so that the positive conductive plug 21 and the negative conductive plug 22 are quickly moved out of the positive conductive slot 32 and the negative conductive slot 33, which can improve the protection of the voltmeter 20, and solve the problem that the DC screen in the prior art is difficult to quickly detect the internal resistance of the battery, and it is difficult to improve the insulation of the system during detection, and it is impossible to improve the protection of the voltmeter.

[0041] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. A DC screen capable of detecting battery internal resistance and system insulation, comprising a DC screen body (1); characterized in that: The lower end of the DC screen body (1) is fixedly connected to a bottom plate (2); the left and right ends of the DC screen body (1) are penetrated by a first slot body (3); the bottom surface of the inner wall of the first slot body (3) is fixedly connected to a first bearing plate (4); an adjustable rheostat (5) is placed on the upper end of the first bearing plate (4); a lifting mechanism (6) is arranged at the rear end of the DC screen body (1); a second limit block (8) and a fixed plate (23) are arranged on the lifting mechanism (6); the left end of the second limit block (8) is fixedly connected to a second bearing plate (9); the upper end of the second bearing plate (9) is fixedly connected to a first electric cylinder (10); and a rebound mechanism is arranged at the left end of the DC screen body (1); the rebound mechanism comprises a second bearing block (11), a spring The left end of the DC screen body (1) is fixedly connected to a second bearing block (11), the upper end of the second bearing block (11) is fixedly connected to a guide column (12) and a spring (13), the upper end of the spring (13) is fixedly connected to a slider (14), the upper end of the slider (14) is penetrated by a second through hole (15), the inner wall of the second through hole (15) is fitted with the side wall of the guide column (12), the rear end of the slider (14) is provided with two grooves (16), the grooves (16) are adapted to the output shaft of the first electric cylinder (10), the upper end of the slider (14) is penetrated by a second electric cylinder (17), and the lower end of the output shaft of the second electric cylinder (17) is fixedly connected to a fixed block (18), the lower end of the fixed block (18) is fixedly connected to a third carrier plate (19), the upper end of the third carrier plate (19) is fixedly connected to a voltmeter (20), the lower end of the third carrier plate (19) is fixedly connected to a positive conductive plug post (21) and a negative conductive plug post (22), the positive conductive plug post (21) and the negative conductive plug post (22) are respectively electrically connected to the positive and negative poles of the voltmeter (20), the upper end of the lifting plate (605) is provided with a detection mechanism, the detection mechanism includes an ammeter (24) and a custom resistor (25), the upper end of the lifting plate (605) is fixedly connected to a fixed plate (23), the upper end of the fixed plate (23) is fixedly connected to the ammeter (24) and the custom resistor (25), the lifting plate ( The front end of the first insulating tube (26) and the second insulating tube (27) are fixedly connected, the lower end of the first insulating tube (26) is provided with a second slot body (28), the lower end of the second insulating tube (27) is provided with a third slot body (29), the inner wall of the first insulating tube (26) is fixedly connected with a first conductive sheet (30), the inner wall of the second insulating tube (27) is fixedly connected with a second conductive sheet (31), the upper end of the first insulating tube (26) is provided with a positive electrode conductive slot (32), the upper end of the second insulating tube (27) is provided with a negative electrode conductive slot (33), the positive electrode conductive plug (21) is matched with the positive electrode conductive slot (32), and the negative electrode conductive plug (22) is matched with the negative electrode conductive slot (33).

2. A DC panel with the function of detecting battery internal resistance and system insulation according to claim 1, characterized in that: The lifting mechanism (6) comprises a first bearing block (601), a motor (602), a threaded column (603), a first threaded sleeve (604) and a lifting plate (605); the first bearing block (601) is fixedly connected to the upper rear end of the DC screen body (1); the motor (602) is fixedly connected to the upper end of the first bearing block (601); the lower end of the output shaft of the motor (602) passes through the first bearing block (601) and is fixedly connected to the threaded column (603); the first threaded sleeve (604) is threadedly mounted on the side wall of the threaded column (603); the lifting plate (605) is fixedly connected to the side wall of the first threaded sleeve (604); the second limit block (8) is fixedly connected to one end of the first threaded sleeve (604) close to the DC screen body (1); the front end of the second limit block (8) is in contact with the rear end of the DC screen body (1); and the upper end of the lifting plate (605) is fixedly connected to the fixing plate (23).

3. A DC panel with the function of detecting battery internal resistance and system insulation according to claim 2, characterized in that: A bearing (606) is fixedly connected to the upper end of the bottom plate (2); the outer wall of the lower end of the threaded column (603) is rotatably mounted on the inner wall of the bearing (606); two guide rods (607) are fixedly connected to the upper end of the bottom plate (2); two first through holes (608) are formed through the upper end of the lifting plate (605); and the inner wall of the first through hole (608) is in contact with the side wall of the guide rod (607).

4. A DC panel with the function of detecting battery internal resistance and system insulation according to claim 1, characterized in that: Two first limit blocks (7) are fixedly connected to the upper end of the first bearing plate (4), and the ends of the two first limit blocks (7) that are close to each other fit with the front and rear ends of the adjustable resistor (5).

5. A DC panel with the function of detecting battery internal resistance and system insulation according to claim 1, characterized in that: The adjustable rheostat (5) is provided with a rheostat positive electrode connector (501) and a rheostat negative electrode connector (502).

6. A DC panel with the function of detecting battery internal resistance and system insulation according to claim 1, characterized in that: The first insulating cylinder (26) and the custom resistor (25) are electrically connected via a wire, and the custom resistor (25) and the ammeter (24) are electrically connected via a wire.

7. A DC panel with the function of detecting battery internal resistance and system insulation according to claim 1, characterized in that: The ammeter (24) is electrically connected to the second insulating tube (27), and the outer walls of the first insulating tube (26) and the second insulating tube (27) are both made of insulating material.

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