Jig for testing distance between tabs of lithium battery

Abstract

The utility model discloses a jig for testing the distance between tabs of a lithium battery. The jig comprises a measuring device, the measuring device is composed of a measuring box, a first moving mechanism, a second moving mechanism and a third moving mechanism, the first moving mechanism is installed at the upper end of the interior of the measuring box, first baffles are installed on the two sides of the upper end of the first moving mechanism, and the second moving mechanism is rotatably installed in the middle of the measuring box; second baffles are installed on the two sides of the upper end of the second moving mechanism. When batteries of different models are measured, the third moving mechanism drives the third baffle plate to move so as to be suitable for placing the batteries of different function widths, and the second moving mechanism is rotated to adjust the distance between the second baffle plates, so that tabs of different intervals can be measured conveniently, and the measurement efficiency is improved. The distance between the first baffles can be adjusted by rotating the first moving mechanism, the distance between the first baffles and the second baffles is changed, and tabs with different widths can be measured conveniently.

Description

Technical Field

[0001] This utility model relates to the field of electrode spacing measurement technology, specifically a fixture for testing the electrode spacing of lithium batteries. Background Technology

[0002] Currently, lithium batteries have advantages such as high voltage platform, no pollution, and good cycle performance. However, square lithium-ion batteries, because their positive and negative electrodes are on the same side, are prone to short circuits in actual production due to the small distance between the electrodes, which can lead to contact between the positive and negative electrodes. This poses a great safety hazard. Therefore, it is necessary to develop a test fixture for the electrode spacing of square lithium batteries.

[0003] Chinese patent CN202123094759.5 discloses a fixture for testing the spacing between the tabs of a square lithium battery. The fixture includes a bakelite base plate with a detection groove near the rear end. Two symmetrical tab alignment grooves are located at the front end of the detection groove. The detection groove is precision-machined, with a center distance of 8mm between the two alignment grooves and a machining accuracy of ±0.1mm. This existing technology can only measure a single battery model, limiting its applicability. Utility Model Content

[0004] The purpose of this invention is to provide a fixture for testing the distance between the tabs of lithium batteries, so as to solve the problems mentioned in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a fixture for testing the distance between lithium battery tabs, comprising a measuring device; the measuring device consists of a measuring box, a first moving mechanism, a second moving mechanism, and a third moving mechanism, wherein the first moving mechanism is installed at the upper end of the measuring box, and a first baffle is installed on both sides of the upper end of the first moving mechanism; the second moving mechanism is rotatably installed at the middle position of the measuring box, and a second baffle is installed on both sides of the upper end of the second moving mechanism; the third moving mechanism is installed at the lower end of the measuring box, and a third baffle is installed on both sides of the upper end of the third moving mechanism; a measuring groove is formed between the first baffle and the second baffle; and the bottom end of the third baffle is slidably installed on the upper side of the measuring box via a sliding mechanism.

[0006] Preferably, a friction pad is provided at the rear end of the measuring box, and the friction pad is attached to the rear end of the friction pad with adhesive.

[0007] Preferably, the sliding mechanism consists of a pin and a slide groove. The slide groove is located on the upper side of the measuring box, and the pin is installed below the third baffle. The pin is slidably installed inside the slide groove.

[0008] Preferably, the measuring box has scale lines on its upper side, located below the first baffle and the third baffle.

[0009] Preferably, a scale is provided on the outer side of the upper end of the second baffle, and the scale is installed on the upper end of the second baffle.

[0010] Preferably, the first moving mechanism, the second moving mechanism, and the third moving mechanism are all composed of a bidirectional lead screw, a lead screw nut, and a knob. The bidirectional lead screw is rotatably installed on both sides inside the measuring box, the lead screw nut is rotatably installed on both sides of the bidirectional lead screw, and a knob is installed on one end of the bidirectional lead screw through the outside of the measuring box.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. When measuring batteries of different models, the third moving mechanism drives the third baffle to move, which is suitable for placing batteries of different functional widths. Rotating the second moving mechanism adjusts the distance between the second baffles, which facilitates the measurement of tabs with different spacings. Rotating the first moving mechanism can adjust the distance between the first baffles, change the distance between the first baffle and the second baffle, and facilitate the measurement of tabs of different widths.

[0013] 2. When the sliding mechanism is in use, the pin moves along the slide groove as the third baffle moves, to prevent the third baffle from shifting during use;

[0014] 3. The scale lines are used to measure the distance between the second baffles and the distance between the third baffles. The distance between the second baffles is the distance between the tabs, and the distance between the third baffles is the width of the battery.

[0015] 4. When the first, second, and third moving mechanisms are in use, the double-acting lead screw is rotated by the knob. During the rotation of the double-acting lead screw, the two upper lead screw nuts will move. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a side view of the structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of the measuring box of this utility model;

[0020] Figure 4This is a schematic diagram of the structure of the third moving mechanism of this utility model.

[0021] In the diagram: 1. Measuring device; 2. Friction pad; 3. Measuring box; 4. Second baffle; 5. Lead screw nut; 6. Scale; 7. First baffle; 8. Knob; 9. Scale line; 10. Slide groove; 11. Lead screw; 12. Sliding mechanism; 13. Third baffle; 14. Pin; 15. Third moving mechanism; 16. Second moving mechanism; 17. First moving mechanism. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 In this embodiment of the present invention, a fixture for testing the distance between the tabs of a lithium battery includes a measuring device 1. The measuring device 1 consists of a measuring box 3, a first moving mechanism 17, a second moving mechanism 16, and a third moving mechanism 15. The first moving mechanism 17 is installed at the upper end of the measuring box 3, and first baffles 7 are installed on both sides of the upper end of the first moving mechanism 17. The second moving mechanism 16 is rotatably installed in the middle of the measuring box 3, and second baffles 4 are installed on both sides of the upper end of the second moving mechanism 16. The third moving mechanism 15 is installed at the lower end of the measuring box 3, and third baffles 13 are installed on both sides of the upper end of the third moving mechanism 15. A measuring groove is formed between the first baffle 7 and the second baffle 4. The bottom end of the third baffle 13 is slidably installed on the upper side of the measuring box 3 through a sliding mechanism 12. A friction pad 2 is provided at the rear end of the measuring box 3. The friction pad 2 is attached to the rear end of the measuring box 3 with adhesive. The friction pad 2 is provided to increase the friction at the bottom end of the measuring box 3 and prevent the measuring box 3 from moving during the measurement process.

[0024] The sliding mechanism 12 consists of a pin 14 and a slide groove 10. The slide groove 10 is located on the upper side of the measuring box 3, and the pin 14 is installed below the third baffle 13. The pin 14 is slidably installed inside the slide groove 10. When the sliding mechanism 12 is in use, the pin 14 moves along the slide groove 10 as the third baffle 13 moves, so as to avoid the third baffle 13 from shifting during use.

[0025] The measuring box 3 has scale lines 9 on its upper side, located below the first baffle 7 and the third baffle 13. The scale lines 9 are used to measure the distance between the second baffles 4 and the distance between the third baffles 13. The distance between the second baffles 4 is the distance between the tabs, and the distance between the third baffles 13 is the width of the battery. A scale ruler 6 is installed on the outer side of the upper end of the second baffle 4. The scale ruler 6 is used to measure the distance between the first baffle 7 and the second baffle 4, so as to facilitate the placement of the tabs between the first baffle 7 and the second baffle 4.

[0026] The first moving mechanism 17, the second moving mechanism 16, and the third moving mechanism 15 are all composed of a bidirectional lead screw 11, a lead screw nut 5, and a knob 8. The bidirectional lead screw 11 is rotatably installed on both sides inside the measuring box 3, and the lead screw nut 5 is rotatably installed on both sides of the bidirectional lead screw 11. One end of the bidirectional lead screw 11 passes through the outside of the measuring box 3 and is fitted with a knob 8. When the first moving mechanism 17, the second moving mechanism 16, and the third moving mechanism 15 are in use, the bidirectional lead screw 11 is rotated by the knob 8, and the bidirectional lead screw 11 will drive the two upper lead screw nuts 5 to move during the rotation.

[0027] The working principle and usage process of this utility model are as follows: In use, the battery is placed between the third baffles 13, and the tabs are guided between the first baffle 7 and the second baffle 4. The tabs are measured through the measuring groove formed between the first baffle 7 and the third baffle 13. At the same time, the distance between the tabs is measured through the distance between the second baffles 4. When measuring different types of batteries, the third baffle 13 is moved by the third moving mechanism 15, which is suitable for placing batteries with different functional widths. The distance between the second baffles 4 is adjusted by rotating the second moving mechanism 16, which facilitates the measurement of tabs with different spacings. The distance between the first baffles 7 and the second baffle 4 can be adjusted by rotating the first moving mechanism 17, which changes the distance between the first baffles 7 and the second baffle 4, making it convenient to measure tabs with different widths.

[0028] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A fixture for testing the distance between the tabs of a lithium battery, comprising a measuring device (1); characterized in that: The measuring device (1) consists of a measuring box (3), a first moving mechanism (17), a second moving mechanism (16), and a third moving mechanism (15). The first moving mechanism (17) is installed inside the measuring box (3) at the upper end. A first baffle (7) is installed on both sides of the upper end of the first moving mechanism (17). The second moving mechanism (16) is rotatably installed in the middle of the measuring box (3). A second baffle (4) is installed on both sides of the upper end of the second moving mechanism (16). The third moving mechanism (15) is installed inside the measuring box (3) at the lower end. A third baffle (13) is installed on both sides of the upper end of the third moving mechanism (15). A measuring groove is formed between the first baffle (7) and the second baffle (4). The bottom end of the third baffle (13) is slidably installed on the upper side of the measuring box (3) through a sliding mechanism (12).

2. The fixture for testing the distance between the tabs of a lithium battery according to claim 1, characterized in that: A friction pad (2) is provided at the rear end of the measuring box (3), and the friction pad (2) is attached to the rear end of the friction pad (2) with adhesive.

3. The fixture for testing the distance between the tabs of a lithium battery according to claim 1, characterized in that: The sliding mechanism (12) consists of a pin (14) and a groove (10). The groove (10) is located on the upper side of the measuring box (3). The pin (14) is installed below the third baffle (13). The pin (14) is slidably installed inside the groove (10).

4. A fixture for testing the distance between the tabs of a lithium battery according to claim 1, characterized in that: The measuring box (3) has scale lines (9) on its upper side, located below the first baffle (7) and the third baffle (13).

5. A fixture for testing the distance between the tabs of a lithium battery according to claim 1, characterized in that: A scale (6) is provided on the outer side of the upper end of the second baffle (4), and the scale (6) is installed on the upper end of the second baffle (4).

6. A fixture for testing the distance between the tabs of a lithium battery according to claim 1, characterized in that: The first moving mechanism (17), the second moving mechanism (16) and the third moving mechanism (15) are all composed of a bidirectional lead screw (11), a lead screw nut (5) and a knob (8). The bidirectional lead screw (11) is rotatably installed on both sides inside the measuring box (3), and the lead screw nut (5) is rotatably installed on both sides of the bidirectional lead screw (11).

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