Fault detection platform for current equalizer

Abstract

The utility model relates to the technical field of circuit current sharing, and discloses a current equalizer fault detection bench, comprising a detection bench, a detection groove arranged along the left and right directions of the detection bench, a current equalizer arranged in the detection groove, and a current output unit and an output detection unit respectively arranged at two sides of the detection groove. The current equalizer comprises a base arranged on the bottom surface of the detection groove and circuit boards fixed above the base at intervals; the circuit board is provided with an input port and an output port, and the input port is connected with the output port; the current output unit is electrically connected with the input port, and the output detection unit is electrically connected with the output port. According to the utility model, the detection bench and the detection groove are arranged, and the current output unit and the current equalizer output detection unit are arranged on two sides of the detection groove on the detection bench; and the current equalizer output detection unit is used for detecting whether the current at the output end of the current equalizer is equalized or not, so that the purpose of detecting whether the effectiveness of the current equalizer is qualified or not is achieved, and the qualified rate of finished products is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit current sharing, and particularly relates to a fault detection bench for a current equalizer. Background Art

[0002] The current equalizer in a circuit is a device used to ensure the uniform distribution of current among multiple power sources or loads connected in parallel; in many applications, such as power systems, battery packs, and motor control, etc., it may be necessary to connect multiple identical power sources (such as switching power supply modules or battery cells) in parallel to increase the total output current capacity. In order to prevent some power sources from being overloaded or to ensure the reliability and efficiency of the system, current sharing technology is required. However, in the prior art, after the main components of the current equalizer are produced and assembled, there is no special device for detecting whether the utility of the current equalizer is qualified, which is not conducive to ensuring or even improving the qualified rate of finished products. Summary of the Invention

[0003] The purpose of the utility model is to overcome the deficiencies existing in the prior art and provide a fault detection bench for a current equalizer. By setting a detection bench, a detection slot, and arranging a current output unit and a current output detection unit on both sides of the detection slot of the detection bench; placing the current equalizer in the detection slot, connecting the current output unit to the input end of the current equalizer, and the current output detection unit is used to detect whether the current at the output end of the current equalizer is evenly distributed, so as to achieve the purpose of detecting whether the utility of the current equalizer is qualified, and further ensure the qualified rate of finished products.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions: A fault detection bench for a current equalizer includes a detection bench, a detection slot opened along the left - right direction of the detection bench, a current equalizer placed inside the detection slot, and a current output unit and an output detection unit respectively located on both sides of the detection slot;

[0005] The current equalizer includes a base placed on the bottom surface of the detection slot and a circuit board fixed above the base at an interval; an input port and an output port are arranged on the circuit board, and the input port is connected to the output port;

[0006] The current output unit is electrically connected to the input port, and the output detection unit is electrically connected to the output port; both the electrical connection between the current output unit and the input port are fixed on the detection bench.

[0007] Furthermore, the detection bench is provided with an up - down positioning structure around the base; the up - down positioning structure includes a middle positioning structure located at the front and rear sides of the base and an end positioning structure located at the detection sending end of the detection slot.

[0008] Further, the middle positioning structure includes a positioning rod fixed on the detection table. An external thread is provided on the outer side of the positioning rod. The positioning rod is threadedly connected with a lifting sleeve through the external thread. A permanent magnet sleeve is fixedly sleeved on the outer side of the lifting sleeve. A pressing plate is provided at the top of the permanent magnet sleeve for pressing the base from above. One end of the pressing plate is sleeved on the outer side of the positioning rod.

[0009] Further, the permanent magnet sleeve is a permanent magnet, and the pressing plate is made of a magnetic material that can be attracted by the permanent magnet sleeve or the outer part of the pressing plate is wrapped with a magnetic material that can be attracted by the permanent magnet sleeve.

[0010] Further, an adjusting handle is fixedly installed on the upper surface of the pressing plate, and the adjusting handle is sleeved on the outer side of the positioning rod.

[0011] Further, the end positioning structure is the same as the middle positioning structure.

[0012] Further, the pressing plate included in the end positioning structure is provided with a jack that penetrates up and down, and an anti-collision strip that can be removed is inserted into the jack; when the pressing plate in the end positioning structure presses the base, one side of the anti-collision strip abuts against the inner wall of the end of the detection groove, and the other side abuts against the end face of the base; the anti-collision strip is made of elastic rubber material.

[0013] Further, two middle positioning structures symmetrically arranged on the front and rear sides of the detection groove are taken as a group, and several groups of the middle positioning structures are arranged at intervals in the left-right direction of the detection groove.

[0014] Further, accommodating grooves are symmetrically opened on the front and rear side walls of the detection groove corresponding to the positioning rod. The bottom of the positioning rod is inserted from the top of the accommodating groove and fixed on the bottom surface of the accommodating groove; an extrusion block is rotatably connected to a section of the positioning rod located in the accommodating groove, and a spring that can abut against the side of the extrusion block close to the left end of the detection groove is fixedly installed on the inner wall of the accommodating groove corresponding to the height of the extrusion block; the spring is arranged in the front-rear direction, and the spring is located on the rotation path of the extrusion block.

[0015] Further, a groove that is recessed into the extrusion block for accommodating the spring is provided at the contact position between the extrusion block and the spring.

[0016] The beneficial effects of the present utility model are:

[0017] 1. By providing a detection table, a detection groove, and arranging a current output unit and a shunt output detection unit on both sides of the detection table where the detection groove is located; placing the shunt in the detection groove, connecting the current output unit to the input end of the shunt, and the shunt output detection unit is used to detect whether the current at the output end of the shunt is evenly distributed, so as to achieve the purpose of detecting whether the utility of the shunt is qualified, and further ensure the qualified rate of finished products.

[0018] 2. By providing external threads on the positioning rod, which are engaged with the internal threads of the lifting sleeve, the lifting of the lifting sleeve realizes the lifting of the pressing plate. By providing a permanent magnet sleeve and making the pressing plate of a magnetic material, the pressing plate has sufficient pressure on the base, improving the stability of the base. By providing the extrusion blocks and springs, the symmetrically arranged extrusion blocks can not only position the base in the horizontal direction (i.e., the front-back direction), but also adapt to bases of different sizes. If the horizontal positioning structure is not provided, it is equivalent to no restriction in the front-back direction. If the distance between the front and back of the detection slot is reduced to limit the front-back direction, it is not conducive to the base being placed in the detection slot, and it needs to be carefully aligned and then placed, which is not convenient enough. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the current equalizing effect detection circuit structure of the present utility model;

[0020] Figure 2 Schematic diagram of the main structure of the present utility model;

[0021] Figure 3 Schematic diagram of the partial sectional structure of the present utility model;

[0022] Figure 4 Schematic diagram of the base positioning structure of the present utility model;

[0023] Figure 5 Schematic sectional view of the up-and-down positioning structure on the side of the base of the present utility model;

[0024] Figure 6 Schematic sectional structure diagram of the up-and-down positioning structure at the end of the present utility model;

[0025] Figure 7 (a) Schematic diagram of the state when the horizontal positioning structure abuts against both sides of the base;

[0026] Figure 7 (b) Schematic diagram of the state of the horizontal positioning structure when the base is not inserted between the horizontal positioning structures.

[0027] In the figure: 1. Detection table; 2. Detection slot; 3. Display screen; 4. Control unit; 5. Current output unit; 501. Input port; 6. Base; 7. Circuit board; 701. Output port; 8. Output detection unit; 9. Accommodation slot; 10. Positioning rod; 11. Lifting sleeve; 12. Permanent magnet sleeve; 13. Pressing plate; 14. Adjusting handle; 15. Extrusion block; 16. Groove; 17. Spring; 18. Jack; 19. Anti-collision strip. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0029] The directional terms mentioned in the present invention, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "side", "top" and "bottom", etc., are only with reference to the orientation of the accompanying drawings. The directional terms used are for explaining and understanding the present invention, rather than for limiting the present invention. Embodiment 1

[0030] As Figures 1 - 2 shown, a current equalizer fault detection bench includes a detection bench 1, a detection slot 2 opened in the left-right direction of the detection bench 1, a current equalizer placed inside the detection slot 2, and a current output unit 5 and an output detection unit 8 respectively located on both sides of the detection slot 2; the cross-section of the detection slot 2 is rectangular; the current equalizer includes a base 6 placed on the bottom surface of the detection slot 2 and a circuit board 7 fixed above the base 6 at an interval distance; an input port 501 and an output port 701 are provided on the circuit board 7, and the input port 501 is connected to the output port 701;

[0031] The current output unit 5 is electrically connected to the input port 501, and the output detection unit 8 is electrically connected to the output port 701; both the current output unit 5 and the electrical connection to the input port 501 are fixed on the detection bench 1; the height of the base 6 is higher than the depth of the detection slot 2.

[0032] The current output unit 5 includes a wire, a socket at the head end of the wire, and a plug at the tail end of the wire inserted into the input port 501; the output detection unit 8 includes a wire, a socket at the head end of the wire, and a plug at the tail end of the wire inserted into the output port 701; the current output unit 5 is connected to a power module inside the detection bench 1, and the output detection unit 8 can be connected to devices for detecting current such as current probes, current sensors, and current detection amplifiers located inside the detection bench 1. The above output detection unit 8, output detection unit 8 and their connected power supply and current probes, etc. all belong to the prior art.

[0033] A display screen 3 is provided on the test bench 1 for displaying the current detection result, and a control unit 4 is also provided. The control unit 4 includes a switch for controlling the current input and output of the current output unit 5, and also includes a controller. The controller is respectively connected to the display screen 3, the switch, the output detection unit 8 and the current probe. When the switch is pressed, the power output is turned on through the controller for detection, and then the output detection unit 8 is connected to the current probe, etc. The current probe transmits the detection information to the controller and then to the display screen 3. This transmission path belongs to the prior art.

[0034] A testing table and a testing tank are set up, and a current output unit and a current equalizer output detection unit are set up on both sides of the testing tank on the testing table; the current equalizer is placed in the testing tank, the current output unit is connected to the input end of the current equalizer, and the current equalizer output detection unit is used to detect whether the current at the output end of the current equalizer achieves current equalization, thereby achieving the purpose of detecting whether the effectiveness of the current equalizer is qualified, and then ensuring the qualified rate of finished products. Example 2

[0035] like Figure 5 , Figure 6 As shown, the difference from Example 1 is that: the detection platform 1 is provided with an upper and lower positioning structure around the base 6; the upper and lower positioning structure includes a middle positioning structure located at the front and rear sides of the base 6 and an end positioning structure located at the detection delivery end of the detection slot 2; Figure 1 and Figure 2 As shown, the right end is the current equalizer detection input end, and the left end is the current equalizer detection completion output end.

[0036] The central positioning structure includes a positioning rod 10 fixed on the detection platform 1, and an external thread is arranged on the outer side of the positioning rod 10. The positioning rod 10 is threadedly connected with the lifting sleeve 11 through the external thread. A permanent magnetic sleeve 12 is fixedly sleeved on the outer side of the lifting sleeve 11. A pressure plate 13 is arranged on the top of the permanent magnetic sleeve 12 for pressing the base 6 from above. One end of the pressure plate 13 is sleeved on the outer side of the positioning rod 10.

[0037] The permanent magnet sleeve 12 is a permanent magnet, and the pressure plate 13 is made of a magnetic material that can be attracted by the permanent magnet sleeve 12, or the pressure plate 13 is wrapped with a magnetic material that can be attracted by the permanent magnet sleeve 12, such as iron, cobalt, nickel, ferrite, aluminum-nickel-cobalt alloy, etc.; the reason why the lifting sleeve 11 is not directly made of permanent magnets is that under the premise of cost considerations, the commonly used permanent magnets are not wear-resistant compared to the existing nuts. This is because the design purpose of the nut is to withstand repeated tightening and disassembly operations, and the design focus of the permanent magnet is on its magnetism rather than mechanical strength, so a permanent magnet is used to set the lifting sleeve, i.e., the nut.

[0038] The upper surface of the pressing plate 13 is fixedly installed with an adjusting handle 14. The adjusting handle 14 is sleeved outside the positioning rod 10 and there is a gap between the two. The adjusting handle 14 is used to rotate the pressing plate 13. After the position of the base 6 is determined, the base 6 is pressed, and then the permanent magnet sleeve 12 and the lifting sleeve 11 are rotated to adjust the pressing plate 13 up and down so that it tightly presses the base 6.

[0039] The end positioning structure includes the structures of the middle positioning structure. However, the pressing plate 13 included in the end positioning structure has a jack 18 that penetrates up and down. An anti-collision strip 19 that can be removed is inserted into the jack 18. When the pressing plate 13 in the end positioning structure presses the base 6, one side of the anti-collision strip 19 abuts against the inner wall of the end of the detection groove 2, and the other side abuts against the end face of the base 6. The anti-collision strip 19 is made of elastic rubber material.

[0040] The middle positioning structures are generally arranged symmetrically. Two middle positioning structures symmetrically arranged on the front and rear sides of the detection groove 2 form a group, and several groups of middle positioning structures are arranged at intervals in the left-right direction of the detection groove 2.

[0041] The height of the base 6 is not less than the sum of the height of the detection groove 2 and the height of the permanent magnet sleeve 12.

[0042] By setting an external thread on the positioning rod, the external thread is matched with the internal thread of the lifting sleeve, and the lifting of the lifting sleeve realizes the lifting of the pressing plate. By setting the permanent magnet sleeve and making the pressing plate of magnetic material, the pressing plate has sufficient pressure on the base, improving the stability of the base. Embodiment 3

[0043] As Figure 3 、 Figure 4 and Figure 7 shown, different from Embodiment 2: Accommodation grooves 9 are symmetrically opened on the front and rear side walls of the detection groove 2 corresponding to the positioning rod 10. The bottom of the positioning rod 10 is inserted from the top of the accommodation groove 9 and fixed to the bottom surface of the accommodation groove 9. A pressing block 15 is rotatably connected to a section of the positioning rod 10 located in the accommodation groove 9. A spring 17 that can abut against the side of the pressing block 15 close to the left end of the detection groove 2 is fixedly installed on the inner wall of the accommodation groove 9 corresponding to the height of the pressing block 15. The spring 17 is arranged in the front-rear direction and is located on the rotation path of the pressing block 15. When the pressing block 15 is pushed by the base 6 and rotates towards the spring 17, when the pressing block 15 rotates to a certain extent, the side of the pressing block 15 starts to compress the spring 17. Until the base 6 is completely fixed, the spring 17 should still be in the compressed state by the pressing block 15 and not break away, thereby determining the relative distance between the spring and the pressing block 15 in the left-right direction. The end of the spring 17 is not connected to the pressing block 15.

[0044] A groove 16 that is recessed into the extrusion block 15 for accommodating the spring 17 is provided at the contact between the extrusion block 15 and the spring 17; the provision of the groove 16 prevents the spring 17 from bending and disengaging from the extrusion block 15 during the process of the extrusion block 15 compressing the spring 17. If it disengages, there will be no horizontal positioning effect on the base.

[0045] The accommodation groove 9 is not provided under each positioning rod 10 and is arranged according to the length of the base 6 of the current divider to be detected.

[0046] By providing the extrusion block and the spring, the symmetrically arranged extrusion blocks can not only position the base in the horizontal direction (i.e., the front - back direction), but also adapt to bases of different sizes; if no horizontal positioning structure is provided, it is equivalent to having no restriction in the front - back direction. If the distance between the front and back sides of the detection groove is reduced to limit the front - back direction, it is not conducive to placing the base into the detection groove. One needs to carefully align and then place it, which is not convenient enough.

[0047] Working process: The extrusion block 15 is sleeved on the positioning rod 10. The end of the positioning rod 10 located inside the accommodation groove 9 does not need to be provided with an external thread, but after the extrusion block 15 is sleeved on the positioning rod 10, a certain frictional force needs to be ensured between the two. When the base 6 is taken out, this frictional force prevents the extrusion block 15 from being easily pushed by the elastic force of the spring 17 to rotate by too large an angle. Even if it rotates under the rebound thrust of the spring 17, it still remains on the left side of the vertical plane perpendicular to the front and back side walls of the detection groove 2, so that it can be directly pushed by the next base 6 to compress the spring again without manual reset.

[0048] When the internal components such as the current equalizer base 6 and the circuit board 7 are installed, without installing the outer shell first, directly push the current equalizer into the detection slot 2 from the feeding end of the detection slot 2. The base 6 slides along the length direction in the detection slot 2 until it slides to the leftmost side of the detection slot, provided that there is no current equalizer on the left. If multiple are detected simultaneously, they are arranged in sequence; there is a certain distance between the two sides of the base 6 and the front and back sides of the inner wall of the detection slot 2; the base 6 starts to squeeze two symmetric extrusion blocks 15 simultaneously from the right side of the extrusion block 15, pushing the extrusion block 15 to make it rotate, and then the groove 16 of the extrusion block 15 buckles towards the spring 17, and the groove 16 compresses the spring 17. The reaction force of the spring 17 symmetrically squeezes both sides of the base 6, thereby realizing the positioning in the horizontal direction or in other words, the front and back direction; the leftmost base 6 squeezes the anti-collision strip 19; then, according to the height of the base 6, turn the permanent magnet sleeve 12, and the permanent magnet sleeve 12 drives the lifting sleeve 11 to lift and lower. The lifting sleeve 11 drives the pressing plate 13 to lift and adjust until the lower surface of the pressing plate 13 is higher than the upper surface of the base 6. Then, turn the adjusting handle 14 to rotate the pressing plate 13 so that it is directly above the base 6. Then, turn the permanent magnet sleeve 12 to make the lifting sleeve 11 level with or slightly lower than the upper surface of the base 6, because generally the upper surface of the lifting sleeve 11 is level with the upper surface of the permanent magnet sleeve 13; the pressing plate 13 tightly presses the base 6 under the action of magnetic force to complete the fixation; then insert the current output unit 5 into the output port 501, connect the output detection unit 8 to the output port 701, and start the detection through the control unit 4. The detection result is displayed on the display screen 3; after the detection is completed, pull up the anti-collision strip 19 from the jack 18, rotate the pressing plates 13 at the end and in the middle or only rotate the pressing plate 13 in the middle, and slightly pull the base 6 to the right to withdraw it from the pressing plate 13 at the end, and then pick up the current equalizer and send it to the next working process.

[0049] The above is only used to illustrate the technical solution of the present invention and not to limit it. Any other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solution of the present invention, as long as they do not depart from the spirit and scope of the technical solution of the present invention, shall be covered by the scope of the claims of the present invention.

Claims

1. A current equalizer fault detection bench, characterized in that: It includes a detection table (1), a detection groove (2) opened in the left - right direction along the detection table (1), a flow equalizer placed inside the detection groove (2), and a current output unit (5) and an output detection unit (8) located on both sides of the detection groove (2) respectively; The flow equalizer includes a base (6) placed on the bottom surface of the detection groove (2) and a circuit board (7) fixedly spaced above the base (6); an input port (501) and an output port (701) are provided on the circuit board (7), and the input port (501) is connected to the output port (701); The current output unit (5) is electrically connected to the input port (501), and the output detection unit (8) is electrically connected to the output port (701); both the current output unit (5) and its electrical connection to the input port (501) are fixed on the detection table (1).

2. The current equalizer fault detection bench according to claim 1, characterized in that: The detection table (1) is provided with an up - down positioning structure around the base (6); the up - down positioning structure includes a middle positioning structure on the front and rear sides of the base (6) and an end positioning structure at the detection and sending end of the detection groove (2).

3. The current equalizer fault detection bench according to claim 2, characterized in that: The middle positioning structure includes a positioning rod (10) fixed on the detection table (1). The outer side of the positioning rod (10) is provided with an external thread. The positioning rod (10) is threadedly connected with a lifting sleeve (11) through the external thread. A permanent magnet sleeve (12) is fixedly sleeved on the outer side of the lifting sleeve (11). A pressing plate (13) is provided at the top of the permanent magnet sleeve (12) for pressing the base (6) from above. One end of the pressing plate (13) is sleeved on the outer side of the positioning rod (10).

4. The current equalizer fault detection bench according to claim 3, characterized in that: The permanent magnet sleeve (12) is a permanent magnet. The pressing plate (13) is made of a magnetic material that can be attracted by the permanent magnet sleeve (12) or the outside of the pressing plate (13) is wrapped with a magnetic material that can be attracted by the permanent magnet sleeve (12).

5. A current equalizer fault detection bench according to claim 3 or 4, characterized in that: An adjusting handle (14) is fixedly installed on the upper surface of the pressing plate (13), and the adjusting handle (14) is sleeved on the outer side of the positioning rod (10).

6. The current equalizer fault detection bench according to claim 5, characterized in that: The end positioning structure is the same as the middle positioning structure.

7. The current equalizer fault detection bench according to claim 6, characterized in that: The pressing plate (13) included in the end positioning structure is provided with a through - hole (18) penetrating up and down. An anti - collision strip (19) that can be removed is inserted into the through - hole (18); when the pressing plate (13) in the end positioning structure presses the base (6), one side of the anti - collision strip (19) abuts against the inner wall of the end of the detection groove (2), and the other side abuts against the end face of the base (6); the anti - collision strip (19) is made of elastic rubber material.

8. A current equalizer fault detection bench according to claim 3, characterized in that: Two middle positioning structures symmetrically arranged on the front and rear sides of the detection groove (2) form a group, and several groups of middle positioning structures are arranged at intervals in the left - right direction along the detection groove (2).

9. The current equalizer fault detection bench according to claim 8, characterized in that: On the front and rear side walls of the detection groove (2) corresponding to the positioning rod (10), accommodating grooves (9) are symmetrically opened. The bottom of the positioning rod (10) is inserted from the top of the accommodating groove (9) and fixed to the bottom surface of the accommodating groove (9). A pressing block (15) is rotatably connected to a section of the positioning rod (10) located in the accommodating groove (9). A spring (17) capable of abutting against the side surface of the pressing block (15) close to the left end of the detection groove (2) is fixedly installed on the inner wall of the accommodating groove (9) corresponding to the height of the pressing block (15). The spring (17) is arranged in the front-rear direction and is located on the rotation path of the pressing block (15).

10. A current equalizer fault detection bench according to claim 9, characterized in that: A groove (16) recessed into the pressing block (15) for accommodating the spring (17) is provided at the contact position between the pressing block (15) and the spring (17).

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