Off-line detection device for thickness of bare cell of lithium battery

Abstract

The utility model relates to the technical field of lithium batteries, and discloses a lithium battery naked cell thickness off-line detection device which comprises a supporting assembly, a driving assembly installed in the supporting assembly, a measuring assembly arranged in the driving assembly, a fixing assembly arranged in the supporting assembly, and a control assembly installed on the surface of the supporting assembly. By arranging the driving assembly and the measuring assembly, the downward pressing force can be accurately controlled, equipment abrasion caused by excessive pressure is avoided, the equipment adjusting frequency caused by measuring errors is reduced, and the measuring accuracy and reliability are improved; by arranging the driving assembly and the fixing assembly, the device can be automatically adjusted according to the size of the battery cell, so that the device can adapt to and fix various battery cells with different sizes, it is ensured that the battery cell is firmly fixed to the detection platform in the measurement process, and extra abrasion of the battery cell in the detection process is reduced.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery technology, and more specifically to an offline detection device for the thickness of bare lithium battery cells. Background Technology

[0002] Lithium-ion battery cells are the core components of lithium-ion batteries. They are the basic units for storing and releasing battery energy. The thickness of lithium-ion battery cells directly affects their performance, safety, and subsequent production processes. Abnormal thickness may reflect quality problems such as the number of electrode sheets or membrane wrinkles, and may even lead to safety hazards such as bulging. Therefore, thickness detection is a key quality control link in cell production.

[0003] The testing of bare battery cells often relies on manual measurement using calipers or height gauges at multiple points. This method involves numerous testing points and long cycles, impacting production efficiency. Furthermore, the pressure applied during manual operation is highly random, and the small contact area leads to significant fluctuations in measurement data. The cells may also shake or shift during the measurement process, causing measurement errors, scratches or damage to the cell surface, increasing the risk of cell wear, and affecting product quality. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides an offline detection device for the thickness of bare lithium battery cells to solve the problems existing in the background art.

[0005] This utility model provides the following technical solution: an offline detection device for the thickness of bare lithium battery cells, including a support assembly, a drive assembly installed inside the support assembly, a measuring assembly inside the drive assembly, a fixing assembly inside the support assembly, and a control assembly installed on the surface of the support assembly. The measuring assembly includes a sleeve, a buffer spring, an infrared probe, and a grating ruler. The sleeve is symmetrically fitted around the pressure plate and movably passes through the pressure plate. The buffer spring is movably fitted around the bottom of the outer pressure plate of the sleeve. The infrared probe is fixedly installed on the top of the sleeve. The grating ruler is symmetrically arranged on the top of the outer pressure plate of the lower pressure rod.

[0006] Preferably, the support assembly includes a testing platform, a support column, and a top cover. The support columns are symmetrically arranged on the top of the testing platform, and the top of the support column is provided with a top cover.

[0007] Preferably, the drive assembly includes a motor, a threaded rod, a lower pressure rod, and a pressure plate. The motor is nested inside the top cover, and the output shaft of the motor is fixedly connected to the threaded rod via a coupling. The lower pressure rod is helically sleeved on the outside of the threaded rod, and the pressure plate is disposed at the bottom of the lower pressure rod.

[0008] Preferably, the fixing component includes a fixing bar, a slider, a limiting shaft, and a fixing spring. The fixing bar is symmetrically arranged on the top of the testing table, and one side of the fixing bar is curved. A slider is symmetrically connected to one side of the fixing bar, and the slider is movably sleeved inside the testing table. The limiting shaft is fixedly installed inside the testing table, and the slider moves through the limiting shaft. The fixing spring is movably sleeved outside the limiting shaft.

[0009] Preferably, the control component includes a CNC controller and a pressure sensor, the CNC controller being fixedly installed on one side of the top cover, and the pressure sensor being positioned directly below the top pressure plate of the testing table.

[0010] The technical effects and advantages of this utility model are as follows:

[0011] 1. By incorporating a drive component and a measuring component, this utility model facilitates precise control of the downward pressure, avoids equipment wear caused by excessive pressure, reduces the frequency of equipment adjustments due to measurement errors, and improves the accuracy and reliability of measurements.

[0012] 2. By incorporating a driving component and a fixing component, this utility model allows the device to automatically adjust according to the size of the battery cell, enabling it to accommodate and fix various battery cells of different sizes. This ensures that the battery cell is firmly fixed on the testing platform during the measurement process, reducing additional wear and tear on the battery cell during testing. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the overall structure and some cross-sectional views of the present invention.

[0015] Figure 3 For the present utility model Figure 2 Schematic diagram of structure A in the middle.

[0016] The attached figures are labeled as follows: 1. Support assembly; 101. Detection table; 102. Support column; 103. Top cover; 2. Drive assembly; 201. Motor; 202. Threaded rod; 203. Pressing rod; 204. Pressure plate; 3. Measuring assembly; 301. Sleeve; 302. Buffer spring; 303. Infrared probe; 304. Grating ruler; 4. Fixing assembly; 401. Fixing strip; 402. Slider; 403. Limiting shaft; 404. Fixing spring; 5. Control assembly; 501. CNC controller; 502. Pressure sensor. Detailed Implementation

[0017] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. The offline detection device for the thickness of bare lithium battery cells involved in this utility model is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0018] Reference Figure 1-3 This utility model provides an offline detection device for the thickness of bare lithium battery cells, including a support component 1, a drive component 2 installed inside the support component 1, a measuring component 3 installed inside the drive component 2, a fixing component 4 installed inside the support component 1, and a control component 5 installed on the surface of the support component 1.

[0019] The support assembly 1 includes a testing table 101, a support column 102 and a top cover 103, wherein the support column 102 is symmetrically arranged on the top of the testing table 101, and the top cover 103 is provided on the top of the support column 102.

[0020] The drive assembly 2 includes a motor 201, a threaded rod 202, a pressing rod 203, and a pressure plate 204. The motor 201 is nested inside the top cover 103, and the output shaft of the motor 201 is fixedly connected to the threaded rod 202 via a coupling. The pressing rod 203 is screwed onto the outside of the threaded rod 202. The pressure plate 204 is located at the bottom of the pressing rod 203, which facilitates starting the motor 201. The output shaft of the motor 201 drives the transmission shaft to rotate, and the transmission shaft drives the threaded rod 202 to rotate. Under the push of the rotation of the threaded rod 202, the pressing rod 203 and the pressure plate 204 are lowered and pressed down to the surface of the battery cell, which is convenient for measurement.

[0021] The measuring component 3 includes a sleeve 301, a buffer spring 302, an infrared probe 303, and a grating ruler 304. The sleeve 301 is symmetrically fitted around the pressure plate 204 and moves through the pressure plate 204. The buffer spring 302 is movably fitted to the bottom of the outer pressure plate 204 of the sleeve 301. The infrared probe 303 is fixedly installed on the top of the sleeve 301. The grating ruler 304 is symmetrically arranged on the top of the outer pressure plate 204 of the lower pressure rod 203. This arrangement is beneficial because when the sleeve 301 descends with the pressure plate 204, its bottom contacts the top of the detection stage 101. The pressure plate 204 continues to descend until it contacts the top of the battery cell. The pressure plate 204 compresses the buffer spring 302. The infrared probe 303 measures and reads the data of the current height of the corresponding grating ruler 304 and performs calculations.

[0022] The fixing component 4 includes a fixing bar 401, a slider 402, a limiting shaft 403, and a fixing spring 404. The fixing bar 401 is symmetrically arranged on the top of the testing table 101, and one side of the fixing bar 401 is curved. The slider 402 is symmetrically connected to one side of the fixing bar 401, and the slider 402 is movably sleeved inside the testing table 101. The limiting shaft 403 is fixedly installed inside the testing table 101, and the slider 402 moves through the limiting shaft 403. The fixing spring 404 is movably sleeved outside the limiting shaft 403, which facilitates pushing the battery cell through the curved side of the fixing bars 401 on both sides. Under the elastic action of the fixing spring 404, the fixing bars 401 on both sides will adapt to the width of the battery cell and fix the battery cell, ensuring the accuracy of the measurement.

[0023] The control component 5 includes a CNC 501 and a pressure sensor 502, wherein the CNC 501 is fixedly installed on one side of the top cover 103, and the pressure sensor 502 is located directly below the top pressure plate 204 of the detection table 101.

[0024] The working principle of this utility model:

[0025] First, set the detection pressure data on the display screen of the CNC 501 in advance. Then, push the battery cell in through the curved side of the two fixing bars 401, so that the slider 402 slides on the limit shaft 403 and squeezes the fixing spring 404. Under the elastic action of the fixing spring 404, the two fixing bars 401 will adapt to the width of the battery cell and fix the battery cell to ensure the accuracy of the measurement.

[0026] Next, the motor 201 is started. The output shaft of the motor 201 drives the transmission shaft to rotate, and the transmission shaft drives the threaded rod 202 to rotate. Under the push of the rotation of the threaded rod 202, the lower pressure rod 203 and the pressure plate 204 are lowered. As the pressure plate 204 descends, its bottom contacts the top of the detection table 101. The pressure plate 204 continues to descend until it contacts the top of the battery cell. The pressure plate 204 compresses the buffer spring 302. The pressure sensor 502 sends the pressure data of the battery cell to the CNC 501. When the pressure data is consistent with the pre-set value, the motor 201 stops. The infrared probe 303 measures and reads the current height data of the corresponding grating ruler 304 and sends the data to the CNC 501 for calculation.

[0027] Finally, the CNC 501 compares the calculated data from the infrared probe 303. If the measurement result exceeds the acceptable range, the display screen of the CNC 501 will prompt the operator.

[0028] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0029] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0030] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An offline detection device for the thickness of bare lithium battery cells, comprising a support assembly (1), a drive assembly (2) installed inside the support assembly (1), a measuring assembly (3) disposed inside the drive assembly (2), a fixing assembly (4) disposed inside the support assembly (1), and a control assembly (5) mounted on the surface of the support assembly (1), characterized in that: The measuring component (3) includes a sleeve (301), a buffer spring (302), an infrared probe (303), and a grating ruler (304). The sleeve (301) is symmetrically sleeved around the pressure plate (204) and the sleeve (301) moves through the pressure plate (204). The buffer spring (302) is movably sleeved at the bottom of the outer pressure plate (204) of the sleeve (301). The infrared probe (303) is fixedly installed at the top of the sleeve (301). The grating ruler (304) is symmetrically arranged at the top of the outer pressure plate (204) of the lower pressure rod (203).

2. The offline detection device for the thickness of bare lithium battery cells according to claim 1, characterized in that: The support assembly (1) includes a testing platform (101), a support column (102) and a top cover (103). The support column (102) is symmetrically arranged on the top of the testing platform (101), and the top of the support column (102) is provided with a top cover (103).

3. The offline detection device for bare lithium battery cell thickness according to claim 2, characterized in that: The drive assembly (2) includes a motor (201), a threaded rod (202), a lowering rod (203), and a pressure plate (204). The motor (201) is nested inside the top cover (103), and the output shaft of the motor (201) is fixedly sleeved with the threaded rod (202) through a coupling. The lowering rod (203) is spirally sleeved on the outside of the threaded rod (202), and the pressure plate (204) is located at the bottom of the lowering rod (203).

4. The offline detection device for bare lithium battery cell thickness according to claim 2, characterized in that: The fixing component (4) includes a fixing bar (401), a slider (402), a limiting shaft (403), and a fixing spring (404). The fixing bar (401) is symmetrically arranged on the top of the testing table (101), and one side of the fixing bar (401) is curved. The slider (402) is symmetrically connected to one side of the fixing bar (401), and the slider (402) is movably sleeved inside the testing table (101). The limiting shaft (403) is fixedly installed inside the testing table (101), and the slider (402) movably passes through the limiting shaft (403). The fixing spring (404) is movably sleeved outside the limiting shaft (403).

5. The offline detection device for the thickness of bare lithium battery cells according to claim 3, characterized in that: The control component (5) includes a CNC (501) and a pressure sensor (502). The CNC (501) is fixedly installed on one side of the top cover (103), and the pressure sensor (502) is located directly below the top pressure plate (204) of the detection table (101).

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