Lithium ion battery pole piece sampler

Abstract

The utility model belongs to the field of production of lithium ion batteries, and particularly relates to a lithium ion battery pole piece sampler which is characterized in that a guide rail stand column is arranged on a base, the guide rail stand column is connected with a base body of a rotating structure assembly, a rotating shaft is arranged in the rotating structure assembly, an incomplete gear is arranged on the rotating shaft, and the incomplete gear is meshed with a rack shaft; a linear guide rail and a sliding block matched with the linear guide rail are arranged on the guide rail stand column, the sliding block is connected with a fixing block of a pre-pressing battery pole piece structural part, a rack shaft of a sampling pole piece structural assembly is arranged between the fixing block and a fixing base in the pre-pressing battery pole piece structural part, and a ceramic punching cutter is arranged below the rack shaft. The utility model aims to solve the problem that the product output in the lithium ion battery pole piece coating process is lower than the input, the unique design ensures the precision of punching the pole piece, and meanwhile, the weight of the fallen material at the edge of the punched pole piece can be identified. The material utilization rate is improved, the manufacturing cost is reduced, and lean management of production is realized, so that the problems and defects of the current industry are effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of lithium-ion battery production, specifically to a lithium-ion battery electrode sampler. Background Technology

[0002] The coating consistency of lithium-ion battery electrodes directly affects the battery's cycle performance and rate performance. If the coating consistency control level is not high, the actual input will be greater than the actual output in terms of battery slurry consumption, and safety issues may occur in terms of battery performance.

[0003] In existing technologies, the lithium battery coating process requires offline weighing of battery electrode sheets to calculate the areal density as a benchmark for calibrating online areal density meters. A current industry problem is that material loss occurs at the edges of the battery electrode sheets after sampling. This results in the actual weight being lower than the theoretical weight of the punched battery electrode sheet, leading to a lower calculated areal density value. Using this lower value to calibrate the online areal density meter necessitates increasing the coating areal density to meet process requirements. This results in actual input exceeding actual output. Utility Model Content

[0004] This invention provides a lithium-ion battery electrode sampler to address the problems of existing technologies.

[0005] To achieve the above objectives, this utility model adopts the following solution: a lithium-ion battery electrode sampler, comprising a base, a guide rail column, a rotating structure assembly, a pre-pressurized battery electrode structure component, a sampling electrode structure assembly, and a ceramic punching die.

[0006] The base is equipped with a guide rail column, the upper part of which is connected to the base of the rotating structure assembly. Inside the rotating structure assembly is a horizontal rotating shaft with an incomplete gear. The incomplete gear meshes with the rack shaft of the sampling electrode structure assembly.

[0007] The guide column is equipped with a vertical linear guide rail and a slider that matches the linear guide rail. The slider is connected to the fixing block of the pre-loaded battery electrode structure.

[0008] In the pre-pressurized battery electrode structure, a rack shaft for sampling electrode components is provided between the fixing block and the fixing seat. A ceramic punching cutter is located below the rack shaft, and the position of the ceramic punching cutter corresponds to the ceramic punching die on the base. Existing patented technologies mostly use metal cutters, but this utility model is the first to use zirconia ceramic, which can avoid metal contamination and improve wear resistance.

[0009] The aforementioned lithium-ion battery electrode sampler includes a rotating structure assembly comprising a base, a rotating shaft, bearing I, bearing II, an incomplete gear, and a spring. Bearing I and bearing II are provided on both sides of the base. Both ends of the rotating shaft are mounted on the base via bearing I and bearing II. One end of the rotating shaft is fixed to the inner ring of the spring, and the outer ring of the spring is fixed to the base. The incomplete gear is connected to the rotating shaft via a flat key.

[0010] The aforementioned lithium-ion battery electrode sampler has a left end cover and a right end cover on both sides of the rotating shaft. The end covers are equipped with levers, and the ends of the levers are equipped with grip balls.

[0011] The aforementioned lithium-ion battery electrode sampler includes a pre-pressurized battery electrode structure comprising a fixed base, a flanged linear bearing, a guide shaft, a retaining ring, a pre-pressurized battery plate, and a helical spring. The fixed base has mounting holes on both sides for fixing the flanged linear bearing. Each of the two flanged linear bearings is equipped with a guide shaft. Each of the two guide shafts has a pre-pressurized battery plate at its lower part. The fixed base and the pre-pressurized battery plate are each equipped with a helical spring. The upper end of the guide shaft is equipped with a retaining ring.

[0012] The aforementioned lithium-ion battery electrode sampler has a sampling electrode structure component consisting of a ceramic cutter holder located below the rack shaft and a ceramic punching cutter located below the ceramic cutter holder.

[0013] The aforementioned lithium-ion battery electrode sampler uses zirconia ceramic as the material for both the ceramic cutting blade and the ceramic cutting die.

[0014] Corrosion resistance verification

[0015] The aforementioned lithium-ion battery electrode sampler features a high-precision pressure sensor on the right and a high-precision pressure sensor on the left of the ceramic punching die. Stainless steel electrode right support plate and stainless steel electrode left support plate are respectively mounted on the right and left high-precision pressure sensors. This invention aims to avoid the measurement deviation caused by material loss detection in static sampling in existing technologies, and proposes a dynamic synchronous sampling design for the first time.

[0016] The aforementioned lithium-ion battery electrode sampler has a touch screen display on its base, and a high-precision pressure sensor on the right and a high-precision pressure sensor on the left are connected to the touch screen display.

[0017] The aforementioned lithium-ion battery electrode sampler has a base consisting of a fixed base, a round tube support, and a support platform, with a touch screen display mounted on the support platform.

[0018] The aforementioned lithium-ion battery electrode sampler uses zirconia ceramic for both the ceramic cutting blade and the ceramic cutting die, which avoids the generation of metal chips during the cutting process. At the same time, the excellent wear resistance, smoothness, and high hardness of zirconia ceramic ensure that the ceramic cutting blade and the ceramic cutting die maintain a stable, long-term, high-precision fit, thus achieving both the reliability and stability of the cut products and greatly extending the service life of the die.

[0019] The above-mentioned lithium-ion battery electrode sampler is used as follows: First, the battery electrode is placed on a stainless steel electrode support plate. The two left-right symmetrical high-precision pressure sensors feed back the weight of the battery electrode to the touch screen. The touch screen records the weight A of the battery electrode before punching and sampling. After punching and sampling, the remaining battery electrode is measured by the left-right symmetrical high-precision pressure sensors and the weight B of the battery electrode is displayed on the touch screen. Theoretically, the weight of the circular sampled electrode that is punched and falls is AB.

[0020] The circular sampling electrode sheet formed after punching is weighed by another electronic scale of the same precision on the line, and the weight C of the circular sampling electrode sheet is recorded. Theoretically, due to the inherent characteristics of battery electrodes, there will inevitably be some material loss when using physical punching. If AB > C, it means that material loss occurred at the edge of the punched battery electrode sheet during the second weighing. First, the on-site process can define the allowable weight range of material loss for the circular sampling electrode sheet process based on the value of (AB) - C. Second, the calculated reference value of the areal density can be accurately determined based on the value of (AB) - C, providing a reliable guarantee for the calibration of the online areal density meter.

[0021] This invention utilizes surface resistivity testing of ceramic punching tools; the surface resistivity of zirconia ceramics is typically greater than 10⁻⁶. 12 Its surface resistivity is Ω·cm, falling into the category of insulating materials. Then, through doping modification and the addition of conductive phase materials (surface modification optimization: a composite process of nano-coated diamond-like carbon film and zirconia ceramic), its surface resistivity can be reduced to 10 Ω·cm. 6 -10 9 Ω·cm, meeting antistatic requirements (surface resistivity of 10 Ω·cm). 6 -10 9 Materials with a surface roughness of Ω·cm can effectively prevent static electricity accumulation. In the lithium-ion battery electrode processing environment, electrostatic discharge may cause the active material on the electrode surface to detach or damage the equipment. The high hardness and smooth surface of zirconia ceramics can reduce triboelectric charging, and its modified conductivity can guide the release of static charge, avoiding local charge accumulation. In the actual use scenario of the sampler, when the ceramic cutting blade contacts the electrode, the low surface roughness (Ra≤0.1μm) can reduce the generation of triboelectric static electricity, and the overall mechanism sensor grounding design further releases the charge.

[0022] The following tests were performed on the zirconia ceramic in this invention.

[0023] 1. Chemical stability test

[0024] Zirconia ceramics (ZrO2) exhibit excellent corrosion resistance in common electrolytes such as LiPF6 / EC-DMC.

[0025] Immersion test: After immersing the zirconia ceramic sample in an electrolyte at 60℃ for 168 hours, the surface was observed to have no cracks or corrosion pits by scanning electron microscopy (SEM), and X-ray diffraction (XRD) analysis showed no crystalline phase change, proving its chemical inertness.

[0026] Ion leaching test: Inductively coupled plasma (ICP) detection showed that the Zr concentration in the immersion solution was less than 0.1 ppm, which is far lower than the 1-5 ppm Fe leaching of metallic materials such as stainless steel.

[0027] Long-term performance: Zirconia ceramics have a Vickers hardness of 1200-1400 HV and wear resistance that is 5-10 times that of metal materials. This can prevent surface wear caused by long-term punching and thus prevent electrolyte from penetrating through microcracks and causing corrosion.

[0028] Lifespan comparison: Traditional metal punching blades show significant surface wear after 1000 consecutive uses, while zirconia ceramic blades remain intact under the same conditions, with a punching accuracy error of ≤±0.01mm.

[0029] Using zirconia ceramic as the ceramic material for ceramic punching cutters and ceramic cutter holders has the following advantages:

[0030] Anti-static function: During the coating process of lithium-ion battery electrodes, active materials (such as graphite and NCM) are prone to attracting dust or agglomerating due to static electricity, resulting in uneven surface density. The anti-static properties of ceramic cutting tools can reduce secondary contamination during sampling and ensure the accuracy of weighing data.

[0031] Corrosion resistance: LiPF in the electrolyte readily generates HF upon contact with water, which is highly corrosive to metallic materials. The acid resistance of zirconia ceramics (stable within a pH range of 1-14) prevents metal ions from contaminating the electrodes due to corrosion, thereby improving battery cycle life.

[0032] Compared with the prior art, this utility model has the following advantages:

[0033] 1. By employing zirconia ceramic stamping dies with excellent mechanical and material properties, combined with ultra-high precision linear guides, a stable, long-cycle, high-precision fit is maintained between the stamping dies, ensuring the edge quality of the sampled battery electrodes after stamping. Simultaneously, the weight loss of the sampled battery electrodes is calculated before and after stamping. Firstly, this allows for accurate determination of whether the calculated areal density benchmark value is true, providing a reliable guarantee for calibrating online areal density meters. This improves the utilization rate and economic value of battery slurry, reducing enterprise costs. Secondly, the on-site process can define the allowable weight range of material loss in the circular sampled electrode process based on the (AB)-C value, strengthening process control.

[0034] 2. In this application, the incomplete gear-rack transmission, compared with the synchronous motion system in the current technology, can achieve intermittent precise punching, and combined with the spring return, improves mechanical efficiency and stability. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of a lithium-ion battery electrode sampler.

[0036] Figure 2 yes Figure 1 Schematic diagram of the hidden structure of the lithium-ion battery electrode sampler

[0037] Figure 3 This is an exploded view of structural component 4 of the lithium-ion battery electrode sampler.

[0038] Figure 4 This is an exploded view of component 5 of the lithium-ion battery electrode sampler.

[0039] Figure 5 This is an exploded view of structural component 6 of the lithium-ion battery electrode sampler.

[0040] Figure 6 This is the front view of an incomplete gear.

[0041] Figure 7 This is a detailed schematic diagram of the mainspring and its mating shaft.

[0042] The diagram is labeled as follows: 1-Base, 2-Guide rail column, 3-Touch screen, 4-Rotating structure assembly, 5-Pre-loaded battery electrode structure component, 6-Sampling electrode structure assembly, 7-Ceramic punching die, 8-Stainless steel electrode right support plate, 9-Stainless steel electrode left support plate, 10-Stainless steel round tube fixed base, 11-Stainless steel round tube support, 13-Stainless steel tube support platform, 14-Right side high-precision pressure sensor, 15-Left side high-precision pressure sensor, 16-Left fixed station of base, 17-Right fixed station of base, 18-Linear guide rail, 1 9-Slider, 20-Fixing hexagonal bolt for ceramic punching lower die, 21-Fixing block, 41-Base, 42-Rotating shaft, 43-Bearing I, 44-Bearing II, 45-Incomplete gear, 46-Curved spring, 47-Left end cover, 48-Right end cover, 49-Tuning lever, 50-Ball gripper, 51-Fixing seat, 52-Flanged linear bearing, 53-Guide shaft, 54-Fixing ring, 55-Preloaded battery plate, 56-Helical spring, 61-Rack shaft, 62-Ceramic cutter holder, 63-Locking hexagonal bolt, 64-Ceramic punching cutter. Detailed Implementation

[0043] To enable those skilled in the art to better understand this utility model, the technical solutions of this utility model will be further described in detail and in full below with reference to the accompanying drawings. The technical terms used in this utility model have the same meaning as those skilled in the art, but specific terms are also used in the specification to refer to specific component names. Those skilled in the art should understand that this utility model does not distinguish components by the difference in their names, but by the function of their components. The use of related terms in this utility model is only for better describing the related components and is not intended to limit this utility model.

[0044] Throughout this specification, specific terms such as "upper" and "lower" indicate orientation or the relative positions of related structures based on the positional relationships shown in the accompanying drawings. Their purpose is solely to facilitate a better understanding of this utility model and its simplified description by those skilled in the art. They are used only to explain a specific posture under a specific condition and the relative positions of the components under that condition, and do not specifically refer to the orientation, structure, and operation that the included devices or elements must have. Therefore, they should not be construed as limitations on this utility model.

[0045] The present invention will be further described below with reference to the accompanying drawings, but this is not intended to limit the present invention.

[0046] like Figures 1-5As shown, a lithium-ion battery electrode sampler includes a base 1, a guide rail column 2, a stainless steel tube support platform 13, a rotating structure assembly 4, a pre-pressurized battery electrode structure 5, a sampling electrode structure assembly 6, a ceramic punching die 7, a right-side high-precision pressure sensor 14, a left-side high-precision pressure sensor 15, a right stainless steel electrode support plate 8, and a left stainless steel electrode support plate 9. The guide rail column 2 and the stainless steel tube support platform 13 are mounted on the base 1.

[0047] The base 1 is provided with a guide rail column 2. The upper part of the guide rail column 2 is connected to the base 41 of the rotating structure assembly 4. The rotating structure assembly 4 is provided with a horizontal rotating shaft 42. The rotating shaft 42 is provided with an incomplete gear 45. The incomplete gear 45 meshes with the rack shaft 61 of the sampling electrode structure assembly 6. The guide rail column 2 is provided with a vertical linear guide rail 18 and a slider 19 that matches the linear guide rail 18. The slider 19 is connected to the fixing block 21 of the pre-pressurized battery electrode structure 5.

[0048] In the pre-pressurized battery electrode structure 5, a rack shaft 61 for sampling electrode structure assembly 6 is provided between the fixing block 21 and the fixing base 51. The pre-pressurized battery electrode structure 5 moves up and down with the rack shaft 61. A ceramic punching cutter 64 is provided below the rack shaft 61, and the position of the ceramic punching cutter 64 corresponds to the ceramic punching die 7 on the base 1.

[0049] The rotating structure assembly 4 includes a base 41, a rotating shaft 42, bearing I 43, bearing II 44, an incomplete gear 45, and a spring 46. Bearing I 43 and bearing II 44 are located on both sides of the base 41. Both ends of the rotating shaft 42 are mounted on the base 41 via bearings I 43 and bearing II 44. One end of the rotating shaft 42 is fixed to the inner ring of the spring 46, and the outer ring of the spring 46 is fixed to the base 41. The incomplete gear 45 is connected to the rotating shaft 42 via a flat key. A left end cap 47 and a right end cap 48 are located on both sides of the rotating shaft 42. A lever 49 is located on each end cap, and the end cap 48 is connected to the lever 49 via a threaded hole. A ball joint 50 is located at the end of the lever 49, and the ball joint 50 is connected to the lever 49 via a threaded hole.

[0050] The pre-pressurized battery electrode structure 5 includes a fixing seat 51, a flanged linear bearing 52, a guide shaft 53, a fixing ring 54, a pre-pressurized battery plate 55, and a helical spring 56. The fixing seat 51 has mounting holes on both sides for fixing the flanged linear bearing 52. Each of the two flanged linear bearings 52 is equipped with a guide shaft 53. Each of the two guide shafts 53 is equipped with a pre-pressurized battery plate 55 at its lower part. The fixing seat 51 and the pre-pressurized battery plate 55 are each equipped with a helical spring 56. The upper end of the guide shaft 53 is equipped with a fixing ring 54.

[0051] The sampling electrode structure component 6 consists of a ceramic cutter holder 62 located below a rack shaft 61. One end of the rack shaft 61 has a mounting hole that mates with a shaft on the ceramic cutter holder 62. A ceramic punching cutter 64 is located below the ceramic cutter holder 62. A threaded hole is located on the side of the rack shaft 61 near the mounting hole. A locking hexagon socket bolt 63 secures the shaft on the ceramic cutter holder 62 through the threaded hole on the rack shaft 61. The ceramic punching cutter 64 and the ceramic punching die 7 are made of zirconia ceramic. This avoids the generation of metal chips during the punching process. Furthermore, the excellent wear resistance, smoothness, and high hardness of zirconia ceramic ensure a stable, long-term, high-precision fit between the ceramic punching cutter 64 and the ceramic punching die 7, further enhancing the reliability of the punched products and significantly extending the service life of the die.

[0052] The ceramic punching die 7 is equipped with a right high-precision pressure sensor 14 and a left high-precision pressure sensor 15 on both sides. The right high-precision pressure sensor 14 and the left high-precision pressure sensor 15 are respectively equipped with a stainless steel electrode right support plate 8 and a stainless steel electrode left support plate 9.

[0053] The stainless steel tube support platform 13 on the base 1 includes a stainless steel round tube support 11 and a stainless steel round tube fixing base 10. The stainless steel tube support platform 13 and the stainless steel round tube support 11 are connected by welding. The stainless steel round tube support 11 is inserted into the stainless steel round tube fixing base 10 for fixation. The stainless steel round tube fixing base 10 is fixed to the base 1 using hexagon socket head cap screws. A touch screen display 3 is provided on the support platform 13. A high-precision pressure sensor 14 on the right and a high-precision pressure sensor 15 on the left are connected to the touch screen display 3.

[0054] like Figure 1 , Figure 2 , Figure 5 As shown, the ceramic punching blade 64 and the ceramic punching die 7 are precisely matched to achieve accurate punching and sampling of battery electrode sheets. Both the ceramic punching blade 64 and the ceramic punching die 7 are made of zirconia ceramic, which avoids the generation of metal chips during the punching process. At the same time, the excellent wear resistance, smoothness, and high hardness of zirconia ceramic can ensure that the ceramic punching blade 64 and the ceramic punching die 7 maintain a stable, long-term, high-precision fit, which not only ensures the reliability and stability of the punched products, but also greatly extends the service life of the die.

[0055] like Figure 1 , Figure 2As shown, the battery electrode is first placed on the right stainless steel electrode support plate 8 and the left stainless steel electrode support plate 9. The right high-precision pressure sensor 14 and the left high-precision pressure sensor 15 feed back the weight of the battery electrode to the touch screen 3. The touch screen 3 records the weight A of the battery electrode before punching and sampling. After punching and sampling, the remaining battery electrode is measured by the right high-precision pressure sensor 14 and the left high-precision pressure sensor 15 and the weight B of the battery electrode is displayed on the touch screen. Theoretically, the weight of the circular sampled electrode that is punched and falls is AB. The circular sampled electrode formed after punching is weighed by another electronic scale of the same precision on the line and the weight C of the circular sampled electrode is recorded. Theoretically, due to the inherent characteristics of the battery electrode, there will definitely be material loss when using physical punching. If AB > C, it means that the edge of the punched battery electrode has lost material during the second weighing. First, the on-site process can define the allowable weight range of material loss in the circular sampled electrode process based on the value of (AB) - C. Secondly, the value of (AB)-C can be used to accurately determine whether the calculated reference value of the areal density is the true value, thus providing a reliability guarantee for calibrating the online areal density meter.

[0056] like Figure 5 , Figure 6 As shown, the toothed part of the rack shaft meshes with the incomplete gear, thereby driving the sampling electrode structure assembly to move up and down.

[0057] like Figure 7 As shown, the inner ring of the spring 46 is fixed to the end of the rotating shaft 42.

[0058] like Figure 1 , Figure 7 As shown, during use, the sampling electrode is first placed manually on the stainless steel right support plate 8 and the stainless steel left support plate 9. Then, the person holds the ball 50 and the lever 49 and moves it downwards. At this time, the spring 46 is compressed and begins to store elastic potential energy. The pre-pressed battery plate 55 first contacts the electrode, and after pre-pressing and positioning the electrode, the ceramic punching blade 64 and the ceramic punching die 7 punch and sample the electrode. After sampling, the lever 49 is rotated, and the elastic potential energy of the spring 46 in the structural assembly 4 begins to be released. The spring 46, through the incomplete gear 45 installed on the rotating shaft 42, meshes with the rack shaft 61 to lift the pre-pressed battery electrode structure 5 and the sampling electrode mechanism assembly 6 to the initial height.

[0059] A lithium-ion battery electrode sampler was used to sample lithium-ion battery electrodes. The effectiveness of the "weight difference method" (i.e., the correlation between the weight difference AB of the electrode before and after punching and the actual weight C of the punched sample) in areal density calibration needs to be verified for its industrial applicability through systematic experiments. Specific experiments are as follows:

[0060] I. Experimental Methods:

[0061] 1. Experimental Samples

[0062] (1) Select three typical areal densities of lithium-ion battery electrodes (low, medium, and high areal densities, such as 10 g / m²). 2 ,

[0063] 20g / m 2 30g / m 2 Ten samples were prepared for each areal density, for a total of 30 samples.

[0064] (2) The electrode size is uniformly 100mm×100mm, and the diameter of the punched circular sampling piece is 20mm (theoretical area).

[0065] 314.16mm 2 ).

[0066] 2. Experimental equipment

[0067] (1) The sampler described in this embodiment (including a high-precision pressure sensor with an accuracy of ±0.001g).

[0068] (2) Calibration-grade electronic scale (accuracy ±0.001g, used for weighing punched sample C).

[0069] (3) Environmental control: constant temperature and humidity laboratory (25℃, 50%RH).

[0070] 3. Experimental Procedure

[0071] Step 1: Place the electrode on the stainless steel tray 8 of the sampler and record the weight A before punching.

[0072] Step 2: Perform the punching operation and record the weight B of the remaining electrode sheet after punching.

[0073] Step 3: Collect the punched sample, weigh it using a calibrated electronic scale, and record the actual weight C.

[0074] Step 4: Calculate the theoretical punching weight ΔW = AB and compare it with C.

[0075] Step 5: Repeat the punching operation 10 times and evaluate the repeatability error.

[0076] II. Examples and Analysis of Experimental Data

[0077] 1. Data table (taking mid-surface density electrode as an example)

[0078]

[0079]

[0080] Note: A: Electrode weight before punching; B: Electrode weight remaining after punching; ΔW = AB: Theoretical punching weight; C: Actual weight of punched sample.

[0081] The average relative error is 0.89% (<1%), indicating that ΔW is highly consistent with C.

[0082] 2. Correlation analysis

[0083] Calculate the linear regression equation and the correlation coefficient R. 2 :

[0084] ΔW = 1.006C + 0.0002(R) 2 =0.998)

[0085] Conclusion: ΔW and C are strongly linearly correlated, with a slope close to 1 and an intercept close to 0, verifying the theoretical reliability of the weight difference method.

[0086] 3. Material loss quantification and areal density calibration

[0087] Calculate the material loss amount D = ΔW - C for each sample group, and statistically analyze the material loss range: D avg =0.002g (standard deviation σ = 0.001g)

[0088] Areal density calibration formula correction:

[0089] True surface density = (C + D) avg ) / S (S is the punching area)

[0090] By modifying the formula, the areal density error was reduced from 2.5% in the traditional method to 0.5%.

[0091] III. Conclusion

[0092] 1. High-precision verification: The average relative error of the weight difference method is <1%, which meets the accuracy requirements for lithium-ion battery areal density calibration (the industry standard is usually ±1%).

[0093] 2. Value of material loss control: Quantitative data on material loss D provides a clear indicator for process control (e.g., setting D≤0.003g).

[0094] (As the qualified threshold), to avoid underestimation of surface density due to edge material loss.

[0095] 3. Economic benefits: Through precise calibration, the utilization rate of coating slurry is increased by 1.2% (taking an annual production of 1GWh of batteries as an example, the cost is reduced by about 500,000 yuan / year).

[0096] All aspects described above fall within the protection scope of this utility model. The specific terminology used in describing the device is merely for the purpose of providing a more detailed explanation and does not constitute any limitation on the utility model.

Claims

1. A lithium-ion battery pole piece sampler characterized by, The utility model relates to a pre-pressing battery plate sampling device, which comprises a base (1), a guide rail stand (2), a rotating structure assembly (4), a pre-pressing battery plate structure (5), a sampling battery plate structure assembly (6), a ceramic punching lower die (7), The base (1) is provided with the guide rail stand (2), the upper portion of the guide rail stand (2) is connected with the base body (41) of the rotating structure assembly (4), the rotating structure assembly (4) is internally provided with a horizontal rotating shaft (42), the rotating shaft (42) is provided with an incomplete gear (45), the incomplete gear (45) is meshed with the rack shaft (61) of the sampling battery plate structure assembly (6), The guide rail stand (2) is provided with a vertical linear guide rail (18) and a slider (19) matched with the linear guide rail (18), the slider (19) is connected with the fixed block (21) of the pre-pressing battery plate structure (5), In the pre-pressing battery plate structure (5), the fixed block (21) and the fixed seat (51) are provided with the rack shaft (61) of the sampling battery plate structure assembly (6), the lower portion of the rack shaft (61) is provided with a ceramic punching cutter (64), and the position of the ceramic punching cutter (64) corresponds to the ceramic punching lower die (7) on the base (1).

2. The lithium-ion battery pole piece sampler of claim 1, wherein, The rotating structure assembly (4) comprises a base body (41), a rotating shaft (42), a bearing I (43), a bearing II (44), an incomplete gear (45) and a clock spring (46), the base body (41) is provided with the bearing I (43) and the bearing II (44) on both sides, the both ends of the rotating shaft (42) are installed on the base body (41) through the bearing I (43) and the bearing II (44), one end of the rotating shaft (42) is fixed with the inner ring of the clock spring (46), the outer ring of the clock spring (46) is fixed with the base body (41), and the incomplete gear (45) is connected with the rotating shaft (42) through a flat key.

3. A lithium-ion battery pole piece sampler according to claim 2, wherein, The both sides of the rotating shaft (42) are provided with a left end cover (47) and a right end cover (48), the end covers are provided with a lever (49), and the end of the lever (49) is provided with a ball (50).

4. The lithium-ion battery pole piece sampler of claim 1, wherein, The pre-pressing battery plate structure (5) comprises a fixed seat (51), a flange linear bearing (52), a guide shaft (53), a fixed ring (54), a pre-pressing battery plate (55) and a spiral spring (56), the both sides of the fixed seat (51) are provided with mounting holes for fixing the flange linear bearings (52), one guide shaft (53) is arranged on each of the left and right flange linear bearings (52), one pre-pressing battery plate (55) is arranged below each of the left and right guide shafts (53), one spiral spring (56) is arranged on the fixed seat (51) and the pre-pressing battery plate (55) respectively, and the upper end of the guide shaft (53) is provided with the fixed ring (54).

5. The lithium-ion battery pole piece sampler of claim 1, wherein, The sampling battery plate structure assembly (6) is provided with a ceramic cutter seat (62) below the rack shaft (61), and the ceramic cutter seat (62) is provided with a ceramic punching cutter (64) below.

6. A lithium-ion battery pole piece sampler according to claim 5, wherein, The ceramic punching cutter (64) and the ceramic punching lower die (7) are made of zirconia ceramic.

7. The lithium-ion battery pole piece sampler of claim 1, wherein, Two sides of the ceramic punch lower die (7) are provided with a right high-precision pressure sensor (14) and a left high-precision pressure sensor (15), and the right high-precision pressure sensor (14) and the left high-precision pressure sensor (15) are respectively provided with a stainless steel pole piece right supporting plate (8) and a stainless steel pole piece left supporting plate (9).

8. The lithium-ion battery pole piece sampler of claim 7, wherein, The base (1) is provided with a touch screen display (3), and the right high-precision pressure sensor (14) and the left high-precision pressure sensor (15) are connected with the touch screen display (3).

9. The lithium-ion battery pole piece sampler of claim 8, wherein, The base (1) is sequentially provided with a fixed base (10), a round pipe support (11) and a support platform (13), and the support platform (13) is provided with the touch screen display (3).

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