Inspection tool for single battery cell

Abstract

The utility model relates to the technical field of battery cells, and discloses a single battery cell inspection tool which comprises a supporting table, a bottom plate is mounted at the top of the supporting table, a first battery cell positioning pin and a second battery cell positioning pin which are symmetrically arranged are mounted at the top of the bottom plate, and a quick clamp is arranged at the top of the bottom plate; the top of one end of the bottom plate is movably provided with an upper pressing plate through a rotating shaft, the upper pressing plate is provided with two sliding grooves which are symmetrically arranged, and resistance testing probes are arranged in the sliding grooves in a sliding mode. The inspection work is more efficient, and the inspection efficiency can be improved by more than 50%; through the rotating structure design of the upper pressing plate and the bottom plate and the cooperation of the fixing function of the rapid clamp, the positioning of the battery cell in the measurement process is more stable, the deviation of the battery cell caused by improper operation is avoided, and the measurement precision is improved.

Description

Technical Field

[0001] This utility model relates to the field of battery cell technology, and in particular to a single battery cell inspection tool. Background Technology

[0002] A battery cell is the most basic component of a battery. It is usually an electrochemical device encapsulated in a metal casing. It is a unit that stores and releases electrical energy, converting chemical energy into electrical energy through chemical reactions. A battery cell is usually composed of a positive electrode, a negative electrode, a separator, and an electrolyte. During the production process of battery cells, inspection fixtures are usually needed to measure the thickness and voltage resistance of the battery cells. Therefore, a single-cell inspection fixture is particularly needed.

[0003] When testing battery cells, due to limited testing resources, some samples cannot be put on the shelf in time. After a certain number of days, it is necessary to inspect the thickness and voltage resistance of the battery cells. However, the existing inspection tooling does not have the function of testing the thickness and voltage resistance at the same time. This is very inconvenient for inspectors and affects the efficiency of inspection. This is not conducive to the use of inspection tooling for a single battery cell. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a single-cell inspection tool.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A single-cell inspection fixture includes a support platform, a base plate mounted on the top of the support platform, a first cell positioning pin and a second cell positioning pin symmetrically arranged on the top of the base plate, and a quick clamp on the top of the base plate for fixing the cell to be measured; an upper pressure plate is movably mounted on the top of one end of the base plate via a rotating shaft, and two symmetrically arranged sliding grooves are formed on the upper pressure plate, with resistance test probes slidably arranged inside the sliding grooves; a thickness gauge is mounted on the upper pressure plate.

[0007] As a further improvement of this utility model, a thickness gauge is installed through the top of the upper pressure plate.

[0008] As a further improvement of this invention: the surface of the resistance test probe is provided with a sliding block, the outer diameter of which is adapted to the inner diameter of the sliding groove.

[0009] As a further improvement of this utility model, a handle is installed on the top of the upper pressure plate.

[0010] As a further improvement of this utility model: a limiting groove is provided on the inner wall of the end of the base plate near the rotating shaft, and a number of limiting blocks are provided at the bottom of the end of the upper pressure plate near the rotating shaft.

[0011] As a further improvement of this utility model, the end of the limiting block away from the upper pressure plate corresponds to the opening position of the limiting groove.

[0012] As a further embodiment of this utility model: the base plate forms a rotating structure with the upper pressure plate through a rotating shaft, and the base plate and the upper pressure plate form a C-shaped structure.

[0013] As a further improvement of this utility model, the vertical cross-section of the base plate is an L-shaped structure.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. Improved measurement efficiency: This device enables simultaneous measurement of cell thickness and internal voltage resistance, reducing the steps of changing tools during the measurement process, making the inspection work more efficient, and improving the inspection efficiency by more than 50%.

[0016] 2. Reasonable structural design: The rotating structure design of the upper pressure plate and the bottom plate, combined with the fixing function of the quick clamp, makes the positioning of the battery cell more stable during the measurement process, avoids the displacement of the battery cell caused by improper operation, and improves the measurement accuracy.

[0017] 3. High ease of operation: The design of the sliding groove and resistance test probe allows operators to flexibly adjust the probe position according to the position of different cell tabs, adapting to various cell specifications and reducing adjustment time.

[0018] 4. Good stability and repeatability: During the measurement process, the thickness gauge and resistance test probe are initially zeroed, so that each measurement can start from the same reference, ensuring the stability and consistency of the measurement data. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a single-cell inspection fixture proposed in this utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the upper pressure plate and the bottom plate cooperating with each other in a single cell inspection fixture proposed in this utility model;

[0021] Figure 3 This is a schematic diagram of the resistance test probe and upper pressure plate in a single cell inspection fixture proposed in this utility model;

[0022] Figure 4 for Figure 3 Enlarged view of the local structure at point A in the image.

[0023] In the diagram: 1. Support platform; 2. Base plate; 3. First cell positioning pin; 4. Second cell positioning pin; 5. Quick clamp; 6. Rotary shaft; 7. Upper pressure plate; 8. Handle; 9. Thickness gauge; 10. Sliding groove; 11. Sliding block; 12. Resistance test probe; 13. Limiting block; 14. Limiting groove. Detailed Implementation

[0024] The technical solution of this patent will be further described in detail below with reference to specific embodiments.

[0025] The embodiments of this patent are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this patent, and should not be construed as limiting this patent.

[0026] Reference Figure 1-4 A single-cell inspection fixture includes a support platform 1, a base plate 2 mounted on top of the support platform 1, and symmetrically arranged first cell positioning pins 3 and second cell positioning pins 4 mounted on top of the base plate 2. A quick clamp 5 is also provided on top of the base plate 2 for fixing the cell to be measured. An upper pressure plate 7 is movably mounted on one end of the base plate 2 via a rotating shaft 6. Two symmetrically arranged sliding grooves 10 are formed on the upper pressure plate 7, and resistance test probes 12 are slidably arranged inside the sliding grooves 10. A thickness gauge 9 is mounted on the upper pressure plate 7, extending through the top of the upper pressure plate 7. Before use, the upper pressure plate 7 is aligned parallel to the base plate 2, at which point the measuring end of the resistance test probe 12 is in contact with the surface of the base plate 2, and the measuring end of the thickness gauge 9 is also in contact with the surface of the base plate 2, both at their initial zero-scale state. During use, the upper pressure plate 7 is flipped upwards, and the cell to be tested is placed between the first cell positioning pins 3 and the second cell positioning pins 4. The quick clamp 5 then securely holds the cell. Then, the upper pressure plate 7 is flipped down to a horizontal position to reset it. The operator can adjust the position of the resistance test probe 12 within the sliding groove 10 to ensure it accurately contacts the electrode tab of the battery cell. At this time, the thickness gauge 9 records the thickness of the battery cell, while the resistance test probe 12 measures the voltage resistance of the battery cell, achieving simultaneous measurement of the battery cell thickness and voltage resistance.

[0027] In a preferred embodiment of this invention, a sliding block 11 is mounted on the outside of the resistance test probe 12. The outer diameter of the sliding block 11 matches the inner diameter of the sliding groove 10, thereby ensuring that the sliding block 11 can slide smoothly inside the sliding groove 10. This design makes it less prone to shaking or jamming when the resistance test probe 12 moves within the sliding groove 10, ensuring the accuracy and smoothness of probe position adjustment. The tight fit between the sliding block 11 and the sliding groove 10 also prevents the probe from shifting due to external forces during measurement, ensuring the accuracy and stability of the data when measuring the internal resistance of the battery cell voltage.

[0028] In a preferred embodiment of this utility model, a handle 8 is installed on the top of the upper pressure plate 7, which facilitates gripping and applying force by the operator during use. The handle 8 allows the upper pressure plate 7 to be easily flipped upwards or reset, making the entire operation more effortless and convenient. The design of the handle 8 not only improves the operational flexibility of the upper pressure plate 7 but also effectively reduces the resistance that the operator may encounter when flipping the upper pressure plate, making the placement and removal of battery cells smoother and improving overall operational efficiency.

[0029] In a preferred embodiment of the present invention, a limiting groove 14 is provided on the inner wall of the bottom plate 2 near the rotating shaft 6, and a plurality of limiting blocks 13 are provided at the bottom of the upper pressure plate 7 near the rotating shaft 6.

[0030] In a preferred embodiment of this invention, the end of the limiting block 13 furthest from the upper pressure plate 7 corresponds to the opening of the limiting groove 14. When the upper pressure plate 7 returns to a horizontal position, the limiting block 13 is precisely embedded in the opening of the limiting groove 14, ensuring that the upper pressure plate 7 and the base plate 2 are in a stable and parallel state, preventing the upper pressure plate 7 from shaking or shifting during the measurement process. This design not only improves the stability of the upper pressure plate 7 and the positioning accuracy of the battery cell during the measurement process, but also enhances the reliability and consistency of the measurement data.

[0031] In a preferred embodiment of this invention, the base plate 2 and the upper pressure plate 7 form a rotating structure via a rotating shaft 6. This design allows the upper pressure plate 7 to rotate freely around the rotating shaft 6, enabling it to be easily flipped up or reset. The rotating shaft 6 allows operators to easily adjust the position of the upper pressure plate 7, facilitating placement and removal during cell measurement. Simultaneously, the rotating structure ensures that the upper pressure plate 7 maintains a smooth movement trajectory during flipping, preventing jamming and thus guaranteeing the durability and smoothness of the device, improving the efficiency of cell measurement and enhancing the user experience.

[0032] In a preferred embodiment of this invention, the base plate 2 has an L-shaped vertical cross-section, which enhances its overall stability and support capacity. When placed on the support platform 1, the L-shaped base plate 2 provides a larger contact surface, effectively dispersing the pressure from the upper pressure plate 7 and the battery cell under test, preventing tilting or deformation during use. Simultaneously, the L-shaped vertical cross-section provides a more stable support point, allowing the base plate 2 to firmly cooperate with the upper pressure plate 7 under the action of the rotating shaft 6, thereby further improving the measurement accuracy and durability of the device. This structural design makes the entire inspection fixture more stable and reliable during use, helping to ensure the consistency of battery cell measurement data.

[0033] The working principle of this utility model:

[0034] Initial state: Before use, place the inspection fixture above the support platform 1. The upper pressure plate 7 is connected to the base plate 2 via the rotating shaft 6 and is in a horizontal parallel state. At this time, the parallel state between the upper pressure plate 7 and the base plate 2 is achieved by the cooperation of the limiting block 13 and the limiting groove 14. The limiting block 13 is located at the end of the upper pressure plate 7 near the rotating shaft 6 and is embedded in the limiting groove 14 on the base plate 2, so that the upper pressure plate 7 and the base plate 2 maintain a stable parallel relationship.

[0035] Zero-point adjustment: In the initial position, the measuring end of the resistance test probe 12 is in contact with the surface of the base plate 2, and the measuring end of the thickness gauge 9 is also in contact with the surface of the base plate 2, both at zero scale. This ensures that all data start from a uniform reference during measurement, improving measurement accuracy.

[0036] Cell Placement: During use, the operator can easily flip the upper pressure plate 7 upwards using the handle 8 at the top of the upper pressure plate 7. Due to the L-shaped vertical cross-section of the base plate 2, the overall device has good stability and can withstand the flipping process of the upper pressure plate 7 without displacement. The cell to be tested is placed between the first cell positioning pin 3 and the second cell positioning pin 4 on the base plate 2, and the cell is fixed in place by the quick clamp 5 to ensure its stable position and prevent it from moving or tilting during the measurement process.

[0037] Reset and Adjustment: After securing the battery cell, the operator flips the upper pressure plate 7 downwards to restore it to a parallel position with the base plate 2, and re-engages the limiting block 13 into the limiting groove 14. This reset action ensures the downward pressure stability of the upper pressure plate 7 and its parallel position with the base plate 2, providing a stable basis for subsequent measurements.

[0038] Thickness Measurement: After the upper pressure plate 7 is reset to its position, the measuring end of the thickness gauge 9 will retract inward due to the presence of the battery cell. The thickness data of the battery cell can be accurately read through the thickness gauge 9. This method ensures the directness and high accuracy of thickness measurement.

[0039] Internal resistance measurement: Since the position of the battery cell's tabs may vary depending on the cell model, the operator can adjust the position of the resistance test probe 12 by adjusting the sliding block 11 within the sliding groove 10. The outer diameter of the sliding block 11 matches the inner diameter of the sliding groove 10, allowing the probe to slide smoothly within the groove and maintain its positional stability. When the probe 12 is adjusted to contact the battery cell's tabs, the internal voltage resistance of the battery cell can be measured. The symmetrically arranged resistance test probes 12 ensure consistent measurement data at both ends, improving measurement accuracy.

[0040] Data Recording and Completion: After completing the simultaneous measurement of thickness and voltage resistance, the operator can record the measurement data. Then, pulling handle 8 flips up the upper pressure plate 7 again, removing the battery cell from the positioning pin, thus completing the entire measurement process.

[0041] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A monomer battery cell inspection tool, comprising a support table (1), characterized in that, The top of the support table (1) is provided with a bottom plate (2), the top of the bottom plate (2) is provided with a first battery cell positioning pin (3) and a second battery cell positioning pin (4) which are symmetrically arranged, and the top of the bottom plate (2) is provided with a quick clamp (5). The top of one end of the bottom plate (2) is movably provided with an upper pressing plate (7) through a rotating shaft (6), two sliding grooves (10) which are symmetrically arranged are formed in the upper pressing plate (7), an electric resistance test probe (12) is slidably arranged in the sliding grooves (10), and a thickness gauge (9) is arranged on the upper pressing plate (7).

2. The single cell inspection tool of claim 1, wherein, The thickness gauge (9) is arranged through the top of the upper pressing plate (7).

3. The single cell inspection tool of claim 1, wherein, The surface of the electric resistance test probe (12) is provided with a sliding block (11), and the outer diameter of the sliding block (11) is matched with the inner diameter of the sliding groove (10).

4. The single cell inspection tool of claim 1, wherein, The top of the upper pressing plate (7) is provided with a handle (8).

5. The single cell inspection tool of claim 1, wherein, The inner wall of one end of the bottom plate (2) is provided with a limiting groove (14), and the bottom of one end of the upper pressing plate (7) is provided with a plurality of limiting blocks (13).

6. The single cell inspection tool of claim 5, wherein, The position of one end of the limiting block (13) away from the upper pressing plate (7) corresponds to the opening position of the limiting groove (14).

7. The single cell inspection tool of claim 1, wherein, The bottom plate (2) and the upper pressing plate (7) form a rotating structure through the rotating shaft (6).

8. The single cell inspection tool of claim 1, wherein, The vertical section of the bottom plate (2) is in L-shaped structure.

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