Downward-pressing coupling type cell insulation and voltage resistance detection device

Abstract

The utility model discloses a down-pressing coupling type cell insulation voltage resistance detection device, which belongs to the technical field of energy storage equipment production, and mainly comprises a bottom plate and a mounting box, the upper plate surface of the bottom plate is provided with a contact part, the mounting box is erected right above the bottom plate, and a floating plate capable of moving up and down is arranged in the mounting box. A floating plate is arranged on the mounting box, a transmission mechanism is connected to the floating plate, two contact columns vertically penetrate through the floating plate, the upper ends of the two contact columns are connected with connecting terminals, the lower ends of the two contact columns are used for being in contact with the battery cell, the connecting terminals are led out of the mounting box, and the contact columns are in contact coupling with pole columns of the battery cell in a downward pressing mode of the transmission mechanism to achieve conduction. And under the condition of not damaging the battery cell pole, rapid connection and conduction with a detection circuit can be realized for detection, so that the detection efficiency is improved. Meanwhile, contact is better, internal resistance is reduced, and detection accuracy is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of energy storage equipment production, and more specifically, particularly relates to a downward-pressure coupling type battery core insulation withstand voltage detection device. Background Art

[0002] In the manufacturing process of lithium-ion batteries, after the pole pieces are produced, the positive and negative pole pieces and the diaphragm are assembled together by winding or stacking, and the diaphragm separates the positive and negative pole pieces. During the battery charging and discharging process, the diaphragm isolates the electron conduction between the positive and negative pole pieces and allows lithium ions to pass through. After winding or stacking assembly, the bare cell needs to be hot-pressed to shape the pole pieces and diaphragm so that they are in closer contact and reduce the resistance to lithium ion transmission. At the same time as hot pressing, the bare cell is often subjected to insulation withstand voltage testing, mainly to determine whether there are foreign particles inside the cell that cause a short circuit.

[0003] The insulation withstand voltage test generally uses a safety instrument. During the test, the instrument applies a voltage to the battery cell, and this voltage lasts for a specified period of time. Then the leakage current is detected to see if it remains within the specified range to determine whether the positive and negative poles of the battery cell are short-circuited. This method requires the safety instrument to be connected to the battery cell before testing. At present, the conventional method uses alligator clips for connection, but direct connection with the alligator clips of the battery cell will not only damage the battery cell pole, but also increase the internal resistance, affecting the detection effect. At the same time, in lithium battery factories, the number of tests required is large. If the connection of the detection circuit is cumbersome and affects the detection speed, it will inevitably reduce production efficiency. Therefore, the ability to quickly and well couple the detection circuit with the battery cell is a problem we need to solve. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a downward-pressing coupling-type battery cell insulation withstand voltage detection device, which quickly connects and couples the contact post with the battery cell by downward pressing to perform conduction detection, so as to solve the technical problems described in the background technology.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: a downward-coupled battery cell insulation withstand voltage detection device, comprising a base plate and a mounting box, the upper plate surface of the base plate is provided with a contact portion, the mounting box is mounted directly above the base plate, a floating plate that can move up and down is provided in the mounting box, and a transmission mechanism is connected to the floating plate, two contact columns are vertically penetrated on the floating plate, the upper ends of the two contact columns are connected to connecting terminals, and the lower ends are used to contact the battery cells, and the connecting terminals are led out of the mounting box.

[0006] As a preferred technical solution of the utility model, the transmission mechanism includes a connecting rod and a mounting seat, the connecting rod is slidably inserted into the mounting seat, the mounting seat is fixedly installed in the mounting box, one end of the connecting rod is connected to the floating plate, and the other end is connected to a foldable "L"-shaped pressure rod, and a connecting piece is connected between the pressure rod and the mounting seat.

[0007] As a preferred technical solution of the utility model, an adjustment plate that can move up and down is provided in the installation box, the mounting seat is fixedly installed on the surface of the adjustment plate, and a rotatable threaded rod is passed through the upper box surface of the installation box. One end of the threaded rod is connected to a rotating block and the other end is passed through the adjustment plate and cooperates with its thread.

[0008] As a preferred technical solution of the utility model, the contact column is slidably installed on the floating plate, and a flange is provided at the lower end of the column. A spring is sleeved on the contact column, and both ends of the spring are respectively abutted against the floating plate and the flange.

[0009] As a preferred technical solution of the utility model, a reinforcement plate is vertically arranged on the floating plate, and two limit grooves are vertically opened on the reinforcement plate. Limit pins are horizontally penetrated on the two contact columns, and the two limit pins are respectively slidably penetrated in the two limit grooves.

[0010] As a preferred technical solution of the utility model, a limit rod is vertically installed on the floating plate, and the limit rod extends upward and slides through the adjustment plate.

[0011] As a preferred technical solution of the utility model, the lower box body of the installation box is provided with a notch for accommodating the battery cell, and the upper plate surface of the bottom plate is provided with a limit frame for positioning the battery cell.

[0012] As a preferred technical solution of the utility model, the contact portion includes a conductive silicone pad, a conductive connecting block is arranged below the conductive silicone pad, and a conductive terminal is arranged on the conductive connecting block.

[0013] As a preferred technical solution of the utility model, a first protective cover is provided on the bottom plate via a hinge, and the first protective cover is provided on the conductive terminal.

[0014] As a preferred technical solution of the utility model, a second protective cover is provided on the outside of the installation box via a hinge, and the second protective cover is provided on the lead-out end of the connecting terminal.

[0015] The utility model provides a downward coupling type battery core insulation withstand voltage detection device, which has the following beneficial effects:

[0016] 1. By setting the contact column and using the transmission mechanism to press down, the contact column and the pole of the battery cell can be connected and coupled to achieve conduction. Without damaging the pole of the battery cell, it can be quickly connected to the detection circuit for detection, thereby improving the detection efficiency. At the same time, the contact is better, the internal resistance is reduced, and the detection accuracy is improved.

[0017] 2. The connection point is led out through the connecting terminal, and the detection circuit is connected to the external terminal. The circuit can be easily disconnected when not in use to move the detection device. At the same time, the positive and negative poles of the battery cell that need to be detected can be easily switched. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the three-dimensional structure of the battery cell insulation withstand voltage detection device provided in this embodiment;

[0019] Figure 2 A schematic diagram of the back structure of the battery cell insulation withstand voltage detection device provided in this embodiment;

[0020] Figure 3 A schematic diagram of the first internal structure of the battery cell insulation withstand voltage detection device provided in this embodiment;

[0021] Figure 4 A schematic diagram of the second internal structure of the battery cell insulation withstand voltage detection device provided in this embodiment;

[0022] Figure 5 A schematic diagram of the structure of the transmission mechanism provided in this embodiment;

[0023] Figure 6 A first structural schematic diagram of the internal transmission connection provided in this embodiment;

[0024] Figure 7 A second structural schematic diagram of the internal transmission connection provided in this embodiment.

[0025] In the figure: 1. bottom plate; 2. mounting box; 3. floating plate; 4. contact column; 41. flange; 5. connecting terminal; 6. battery cell; 7. connecting rod; 71. adjusting bolt; 72. threaded barrel; 73. first nut; 74. second nut; 8. mounting seat; 9. pressure rod; 10. connecting piece; 11. conductive silicone pad; 12. conductive connecting block; 13. conductive terminal; 14. spring; 15. reinforcement plate; 16. limiting groove; 17. limiting pin; 18. limiting frame; 19. handle; 20. first protective cover; 21. second protective cover; 22. rotating sleeve; 23. adjusting plate; 24. threaded rod; 25. rotating block; 26. limiting rod. DETAILED DESCRIPTION

[0026] The following is a further detailed description of the implementation of the present utility model in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0027] The technical solution provided by this utility model:

[0028] A downward coupling type battery cell insulation withstand voltage detection device, such as Figure 1-Figure 4 As shown, the detection device mainly includes two parts: a base plate 1 and a mounting box 2. The upper plate surface of the base plate 1 is provided with a contact part, and the mounting box 2 is mounted directly above the base plate 1. A floating plate 3 that can move up and down is provided in the mounting box 2, and a transmission mechanism is connected to the floating plate 3, and the floating plate 3 is controlled to move up and down by the transmission mechanism. Two contact posts 4 are vertically penetrated on the floating plate 3. The upper ends of the two contact posts 4 are connected to connection terminals 5, and the connection terminals 5 are led out of the mounting box 2. The lower end is used to contact the battery cell 6, and a small tooth with dense density is provided at one end of the contact battery cell 6 to ensure that the pole is not damaged while reducing the contact internal resistance. During the detection, the battery cell 6 is placed under the two contact posts 4, and the connection terminals 5 correspond to the positive and negative poles of the battery cell 6. The positive or negative pole to be detected is selected, and one side of the detection circuit is correspondingly connected to the connection terminal 5 of the positive or negative pole through a wiring terminal or an alligator clip, and the other side of the detection circuit is connected to the contact part. The transmission mechanism is used to control the floating plate 3 to move in the direction so that the contact post 4 contacts the pole of the battery cell 6 to couple them, and then the test can be carried out. This downward coupling method can quickly complete the circuit connection and improve the detection efficiency.

[0029] Among them, regarding the transmission mechanism, the transmission mechanism can be a connecting rod 7 (not shown), one end of the connecting rod 7 is connected to the floating plate 3, and the other end is connected to the operating block, and the connecting rod 7 drives the floating plate 3 to be pressed down by pressing the operating block to complete the transmission. However, this method requires a continuous downward force during detection to keep the contact column 4 in close contact with the pole of the battery cell 6.

[0030] In order to meet the requirement of close contact between the contact post 4 and the pole of the battery cell 6, as shown in FIG. Figure 5 As shown, the transmission mechanism is configured to include a connecting rod 7 and a mounting seat 8, wherein the connecting rod 7 is slidably inserted into the mounting seat 8, and the mounting seat 8 is fixedly mounted in the mounting box 2. One end of the connecting rod 7 is connected to the floating plate 3, and the other end is connected to a foldable "L"-shaped pressure rod 9, and a connecting piece 10 is connected between the pressure rod 9 and the mounting seat 8. By folding the "L"-shaped pressure rod 9, the end of the pressure rod 9 pushes the connecting rod 7 downward, so that the connecting rod 7 drives the floating plate 3 to move downward, thereby realizing transmission. After the pressure rod 9 is folded, force can be continuously applied to the connecting rod 7 to ensure that the contact column 4 is always in close contact with the pole of the battery cell 6, and the pressure rod 9 can be restored after it is straightened.

[0031] In order to make the detection device adaptable to detect batteries 6 of different heights, it is necessary to adjust the height of the contact post 4 so that it can just contact the pole of the battery 6 when pressed down. Figure 3 Figure 4 Figure 6 Figure 7 As shown, the present solution is provided with an adjustment plate 23 that can move up and down in the installation box 2, and the mounting seat 8 is fixedly mounted on the plate surface of the adjustment plate 23. A rotatable threaded rod 24 is penetrated on the upper box surface of the installation box 2, wherein the threaded rod 24 is installed by fixing a rotating sleeve 22 on the installation box 2, and the threaded rod 24 is installed in the rotating sleeve 22, and the threaded rod 24 can rotate in the rotating sleeve 22, and the rotating sleeve 22 clamps the threaded rod 24 to prevent the threaded rod 24 from moving up and down. A rotating block 25 is connected to one end of the threaded rod 24, and the other end is penetrated on the adjustment plate 23 and threadedly engaged with it. When the height needs to be adjusted, the threaded rod 24 is rotated by rotating the rotating block 25. Because the adjustment plate 23 and the threaded rod 24 are threadedly engaged, the adjustment plate 23 can move up and down. When the adjustment plate 23 moves up and down, the mounting seat 8 can be driven to move, thereby driving the entire transmission mechanism to move, so as to achieve the function of adjusting the height of the contact column 4.

[0032] There is another way, such as Figure 5 As shown, the connecting rod 7 is designed to include an adjusting bolt 71 and a threaded barrel 72. The adjusting bolt 71 is inserted into the threaded barrel 72 and locked by a first nut 73. The end of the adjusting bolt 71 is inserted into the floating plate 3 and fixed by a second nut 74. The height of the floating plate 3 is adjusted by adjusting the length of the threaded barrel 72 and the adjusting bolt 71, so as to adjust the height of the contact column 4.

[0033] In order to make the contact post 4 and the pole of the battery cell 6 contact each other when pressing down to avoid damage caused by hard collision, as shown in FIG. Figure 3 Figure 4 Figure 6 Figure 7 As shown, the contact post 4 is slidably inserted into the floating plate 3, and a flange 41 is provided at the lower end of the post, and a spring 14 is sleeved on the contact post 4, and the two ends of the spring 14 are respectively in contact with the floating plate 3 and the flange 41. After the contact post 4 contacts the pole of the battery cell 6, the spring 14 is squeezed and contracted, so that the contact post 4 will not crush the pole of the battery cell 6, and at the same time, the spring 14 will provide a supporting force, which will be applied to the contact post 4, so that the contact post 4 and the pole of the battery cell 6 are closely fitted.

[0034] When the contact pin 4 slides through the floating plate 3, in order to limit the rotation of the contact pin 4 and the amount of up and down movement of the contact pin 4. Figure 3As shown, a reinforcing plate 15 is vertically arranged on the floating plate 3, and two limiting grooves 16 are vertically opened on the reinforcing plate 15. Limiting pins 17 are horizontally penetrated on the two contact pillars 4, and the two limiting pins 17 are respectively slidably penetrated in the two limiting grooves 16. By using the cooperation between the limiting pins 17 and the limiting grooves 16, the contact pillars 4 can only move up and down along the direction of the limiting grooves 16, but cannot rotate. At the same time, the up and down amount of the contact pillars 4 can only be determined according to the sliding distance of the limiting pins 17 in the limiting grooves 16, which plays a limiting role on the contact pillars 4.

[0035] In addition, since the floating plate 3 moves up and down, it is necessary to prevent the floating plate 3 from rotating out of position. Figure 7 As shown, a limit rod 26 is vertically installed on the floating plate 3, and the limit rod 26 extends upward and slides through the adjustment plate 23. The limit rod 26 is used to limit the floating plate 3, so that the floating plate 3 can only move up and down along the direction of the limit rod 26, and cannot rotate. Two limit rods 26 can be provided, and the spacing between the two limit rods 26 is distributed on the left and right sides of the connecting rod 7 to ensure uniform force.

[0036] During the test, the pole of the battery cell 6 needs to be accurately placed under the contact post 4 so that the contact post 4 can face the pole of the battery cell 6. Figure 1 Figure 3 As shown, in order to facilitate alignment, a notch for accommodating the battery cell 6 is provided in the lower box body of the installation box 2, and a limit frame 18 for positioning the battery cell 6 is provided on the upper plate surface of the bottom plate 1. When placing the battery cell 6, the lower end of the battery cell 6 is embedded in the limit frame 18, and the upper end of the battery cell 6 is embedded in the notch, so that the battery cell 6 is guided so that the pole of the battery cell 6 is just below the contact pole 4, ensuring alignment.

[0037] Regarding the contact part, the contact part is used to conduct the outside of the battery cell 6, in order to facilitate contact with the battery cell 6, such as Figure 1 As shown, the contact portion is set as a conductive silicone pad 11, a conductive connecting block 12 is set below the conductive silicone pad 11, and a conductive terminal 13 is set on the conductive connecting block 12. The conductive terminal 13 is connected to the conductive terminal 13 through a terminal or an alligator clip to achieve conduction.

[0038] When testing the connection detection circuit, in order to prevent the connection points from being touched, such as Figure 1 As shown, a first protective cover 20 is provided on the bottom plate 1 through a hinge, and the first protective cover 20 is provided on the conductive terminal 13 to prevent the connection point of the conductive terminal 13 from being touched. A second protective cover 21 is provided on the outside of the installation box 2 through a hinge, and the second protective cover 21 is provided on the lead-out end of the connection terminal 5 to prevent the connection point of the connection terminal 5 from being touched.

[0039] When not in use, since the connection point is led out through the connection terminal 5, the circuit can be directly disconnected externally and the detection device can be moved. In order to facilitate movement, handles 19 are also provided at both ends of the bottom plate 1.

[0040] The specific usage and function of this embodiment are as follows:

[0041] When the utility model is used, Figure 3 Figure 4 As described above, firstly, according to the height of the battery cell 6 , the threaded rod 24 is rotated by rotating the rotating block 25 to drive the entire transmission mechanism to move, thereby adjusting the height of the contact column 4 to correspond to the height of the battery cell 6 .

[0042] After the adjustment is completed, the connection terminal 5 on the positive or negative electrode to be tested is connected to the conductive terminal 13 through the terminal or the alligator clip to connect it to the detection circuit. Then the lower end of the battery cell 6 is embedded in the limit frame 18, and the upper end of the battery cell 6 is embedded in the notch, so that the battery cell 6 is guided so that the pole of the battery cell 6 is just below the contact pole 4 to ensure that it can be aligned.

[0043] After the alignment is completed, the "L"-shaped pressure rod 9 is folded so that the end of the pressure rod 9 pushes the connecting rod 7 downward, so that the connecting rod 7 drives the floating plate 3 to move downward. The downward movement of the floating plate 3 presses the contact column 4 downward to contact and couple with the pole of the battery cell 6, thereby realizing circuit connection for detection.

[0044] After testing one electrode (positive or negative), replace and connect another connection terminal 5 to detect another electrode of the battery cell 6, and then couple with another electrode by folding the "L"-shaped pressure rod 9 to perform detection in sequence.

[0045] This method can realize the rapid coupling of the detection circuit to the battery cell 6 during the insulation withstand voltage detection of the battery cell 6 in the factory, thereby accelerating the detection efficiency and improving productivity.

[0046] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

[0047] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0048] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A downward coupling type battery cell insulation withstand voltage detection device, characterized in that: The invention comprises a base plate (1) and an installation box (2), wherein the upper plate surface of the base plate (1) is provided with a contact portion, the installation box (2) is mounted directly above the base plate (1), a floating plate (3) movable up and down is provided in the installation box (2), and a transmission mechanism is connected to the floating plate (3), two contact columns (4) are vertically penetrated on the floating plate (3), the upper ends of the two contact columns (4) are connected to connection terminals (5), and the lower ends thereof are used to contact the battery core (6), and the connection terminals (5) are led out of the installation box (2).

2. The downward coupling type battery cell insulation withstand voltage detection device according to claim 1, characterized in that: The transmission mechanism comprises a connecting rod (7) and a mounting seat (8), wherein the connecting rod (7) is slidably inserted into the mounting seat (8), and the mounting seat (8) is fixedly mounted in the mounting box (2). One end of the connecting rod (7) is connected to the floating plate (3), and the other end is connected to a foldable "L"-shaped pressure rod (9), and a connecting piece (10) is connected between the pressure rod (9) and the mounting seat (8).

3. The downward coupling type battery cell insulation withstand voltage detection device according to claim 2, characterized in that: The installation box (2) is provided with an adjustment plate (23) which can be moved up and down, the installation seat (8) is fixedly installed on the plate surface of the adjustment plate (23), and a rotatable threaded rod (24) is passed through the upper box surface of the installation box (2), one end of the threaded rod (24) is connected to a rotating block (25) and the other end is passed through the adjustment plate (23) and is threadably matched with the adjusting block.

4. The downward coupling type battery cell insulation withstand voltage detection device according to any one of claims 1 to 3, characterized in that: The contact column (4) is slidably mounted on the floating plate (3) and is provided with a flange (41) at the lower end of the column. A spring (14) is sleeved on the contact column (4), and two ends of the spring (14) are respectively abutted against the floating plate (3) and the flange (41).

5. The downward coupling type battery cell insulation withstand voltage detection device according to claim 4, characterized in that: A reinforcing plate (15) is vertically arranged on the floating plate (3), and two limit grooves (16) are vertically opened on the reinforcing plate (15). Limit pins (17) are transversely penetrated on the two contact pillars (4), and the two limit pins (17) are respectively slidably penetrated in the two limit grooves (16).

6. The downward coupling type battery cell insulation withstand voltage detection device according to claim 3, characterized in that: A limiting rod (26) is vertically mounted on the floating plate (3), and the limiting rod (26) extends upward and is slidably disposed on the adjusting plate (23).

7. The downward-coupled cell insulation withstand voltage detection device according to claim 1, 2, 3 or 6, characterized in that: The lower box body of the installation box (2) is provided with a notch for accommodating the battery cell (6), and the upper plate surface of the bottom plate (1) is provided with a limiting frame (18) for positioning the battery cell (6).

8. The downward coupling type battery cell insulation withstand voltage detection device according to claim 1, characterized in that: The contact portion comprises a conductive silicone pad (11), a conductive connection block (12) is arranged below the conductive silicone pad (11), and a conductive terminal (13) is arranged on the conductive connection block (12).

9. The downward coupling type battery cell insulation withstand voltage detection device according to claim 8, characterized in that: A first protective cover (20) is provided on the bottom plate (1) via a hinge, and the first protective cover (20) is provided on the conductive terminal (13).

10. The downward coupling type battery cell insulation withstand voltage detection device according to claim 1, characterized in that: A second protective cover (21) is provided on the outside of the installation box (2) via a hinge, and the second protective cover (21) is provided on the lead-out end of the connection terminal (5).

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