A laser, electromagnetic wave and ray irradiation device for a battery electrode sheet

Abstract

A kind of battery pole piece laser, electromagnetic wave and radiation of ray's radiation device, including unwinding system, winding system and laser radiation irradiation system, battery pole piece is tensioned between unwinding system and winding system;The laser radiation irradiation system is used to output the laser beam of Gaussian spot, and the laser beam of Gaussian spot is formed into rectangular spot and irradiated on battery pole piece, to carry out laser and electromagnetic, radiation irradiation of ray to battery pole piece, to make the microcosmic world of battery pole piece inside under the condition of light irradiation carry out chemical reaction, to reach the desired state required;Wherein, the laser radiation irradiation system is two, one of which is located at the A side of battery pole piece, for the laser, electromagnetic wave and radiation of ray's radiation device for the A surface of battery pole piece, another is located at the B side of battery pole piece, for the laser, electromagnetic wave and radiation of ray's radiation device for the B surface of battery pole piece.

Description

Technical Field

[0001] This utility model relates to the field of new energy batteries, specifically to a radiation irradiation device for battery electrodes using lasers, electromagnetic waves, and rays. Background Technology

[0002] In the field of new energy batteries, batteries are mainly composed of positive and negative electrodes and the battery casing. However, the lifespan of a battery depends on the density, purity, and presence of other impurities of the substrates attached to the positive and negative electrodes. Existing electrodes require many processes in production. While visible substances such as impurities and burrs can be removed as much as possible using relevant instruments and equipment, the internal structure of the electrodes cannot be handled well. For example, the different lithium insertion and extraction mechanisms of electrodes made of different materials significantly affect lithium dendrite growth, lithium ion transport, and volume expansion.

[0003] Currently, electrode heating is mainly carried out in an oven, using high-temperature gas or electromagnetic heating methods to dry the electrodes. However, due to the uneven temperature inside the oven, electromagnetic heating requires heating in a fairly long chamber. After heating, testing and analysis are conducted to determine if the desired effect has been achieved. This process can easily lead to electrode powder explosion or damage, resulting in a lower yield rate. Utility Model Content

[0004] In view of the technical defects and drawbacks existing in the prior art, this utility model provides a laser, electromagnetic wave and ray radiation irradiation device for battery electrodes to overcome the above problems or at least partially solve the above problems. The specific solution is as follows:

[0005] A device for irradiating battery electrodes with laser, electromagnetic waves and rays includes an unwinding system, a winding system and a laser radiation irradiation system, wherein the battery electrodes are tensioned between the unwinding system and the winding system.

[0006] The laser radiation irradiation system is used to output a Gaussian laser beam and shape the Gaussian laser beam into a rectangular spot to irradiate the battery electrode, so as to irradiate the battery electrode with laser, electromagnetic and X-ray radiation, so that the microscopic chemical reaction inside the battery electrode under the conditions of light radiation can reach the desired ideal state.

[0007] The laser radiation irradiation system consists of two systems: one is an A-side laser radiation irradiation system, and the other is a B-side laser radiation irradiation system. The A-side laser radiation irradiation system is located on the A-side of the battery electrode and is used to irradiate the A-side of the battery electrode with laser, electromagnetic waves, and rays. The B-side laser radiation irradiation system is located on the B-side of the battery electrode and is used to irradiate the B-side of the battery electrode with laser, electromagnetic waves, and rays.

[0008] Furthermore, the device also includes a take-up main drive system and an unwinding main drive system. The unwinding main drive system drives the unwinding of the unwinding system and controls the unwinding speed of the unwinding system. The take-up main drive system drives the take-up of the take-up system and controls the take-up speed of the take-up system. The operating speed of the take-up guide roller of the take-up main drive system can be set to 10–100 m / min, optionally 30–70 m / min, including but not limited to any one of 10 m / min, 15 m / min, 20 m / min, 25 m / min, 30 m / min, 35 m / min, 40 m / min, 45 m / min, 50 m / min, 55 m / min, 60 m / min, 65 m / min, 70 m / min, 75 m / min, 80 m / min, 85 m / min, 90 m / min, 95 m / min, and 100 m / min, or a range between any two, or other operating speeds as needed. By adjusting the operating speed of the conveyor unit, the flame generated by the flame heating unit can be adjusted to allow the electrode to pass through quickly, thereby achieving rapid heating of the electrode and improving processing efficiency.

[0009] Furthermore, the device also includes two exhaust gas removal systems, one of which is the A-side exhaust gas removal system and the other is the B-side exhaust gas removal system. The A-side exhaust gas removal system is used to treat the exhaust gas generated by the battery electrode due to the irradiation of the A-side laser radiation system, and the B-side exhaust gas removal system is used to treat the exhaust gas generated by the battery electrode due to the irradiation of the B-side laser radiation system.

[0010] Furthermore, each of the aforementioned exhaust gas removal systems includes a front exhaust gas removal chamber and a rear exhaust gas removal chamber. The front exhaust gas removal chamber covers the illuminated surface of the battery electrode and is used to treat the exhaust gas generated on the illuminated surface of the battery electrode due to laser irradiation. The rear exhaust gas removal chamber covers the back side of the illuminated surface of the battery electrode and is used to treat the exhaust gas generated on the back side of the illuminated surface of the battery electrode due to laser irradiation.

[0011] Furthermore, the device also includes a front roller assembly and a rear roller assembly for supporting and guiding the battery electrode sheet, the battery electrode sheet being located between the front roller assembly and the rear roller assembly, the front roller assembly and the rear roller assembly being used to make the surface of the battery electrode sheet located between the front roller assembly and the rear roller assembly perpendicular to the laser irradiating the surface of the battery electrode sheet.

[0012] Furthermore, the radiation irradiation device for the battery electrode, including laser, electromagnetic wave and X-ray, also includes an infrared digital temperature controller system. The infrared digital temperature controller system is integrated into the laser radiation irradiation system and is used to collect the temperature of the irradiated area of ​​the battery electrode and feed the collected temperature back to the laser radiation irradiation system. The laser radiation irradiation system is also used to control the intensity of the output laser based on the temperature of the irradiated area of ​​the battery electrode, so that the temperature of the irradiated area of ​​the battery electrode is within a preset range.

[0013] Furthermore, the laser radiation irradiation system also integrates a focal length adjustment component, which is used to adjust the size of the laser spot based on the size of the battery electrode, so that the laser spot covers the battery electrode in the width direction.

[0014] Furthermore, the laser radiation irradiation system includes a fiber laser.

[0015] Furthermore, the wavelength of the fiber laser is 200–1500 nm, and the power is set from 1000 to 6000 W, optionally from 2000 to 4000 W. This includes, but is not limited to, any one of 1000 W, 1500 W, 2000 W, 2500 W, 3000 W, 3500 W, 4000 W, 4500 W, 5000 W, 5500 W, and 6000 W, or a range between any two, or other operating settings as needed. By adjusting or changing the laser power, the speed at which the battery electrodes are heated by the laser can be adjusted, achieving rapid heating of the electrodes and improving processing efficiency.

[0016] Furthermore, the fiber laser is a semiconductor laser or a gas laser.

[0017] Furthermore, the laser radiation irradiation system includes a collimation module, a light homogenizing module, and a light projection module arranged sequentially along the optical path.

[0018] This utility model has the following beneficial effects:

[0019] This invention utilizes a device that irradiates battery electrodes with lasers, electromagnetic waves, and rays, enabling the mixture inside the electrodes to fully react in the microscopic world and achieve the desired results. Data shows that under specific environmental and conditions, the internal structure of the electrodes undergoes the necessary chemical reactions, as well as physical reactions that affect the electrodes, thus greatly improving the lifespan of the batteries made from the electrodes. Attached Figure Description

[0020] Figure 1 A schematic diagram of the structure of a radiation irradiation device for a battery electrode sheet using laser, electromagnetic waves, and rays, provided for an embodiment of this utility model;

[0021] Figure 2 A schematic diagram of a laser radiation irradiation system provided for an embodiment of this utility model;

[0022] In the diagram: 1-Unwinding system; 2-Unwinding main drive system; 3-Battery electrode; 4-A-side laser radiation irradiation system; 5-A-side exhaust gas removal system; 6-B-side exhaust gas removal system; 7-B-side laser radiation irradiation system; 8-Roller assembly; 9-Rewinding main drive system; 10-Rewinding system; 11-Infrared digital temperature controller system; 12-Laser radiation irradiation system; 13-Focus adjustment assembly; 14-Front exhaust gas removal chamber; 15-Front roller assembly; 16-Rear roller assembly; 17-Rear exhaust gas removal chamber. Detailed Implementation

[0023] 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 a part of the present utility model, and not all of the 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.

[0024] See Figure 1 As shown, this utility model provides a laser, electromagnetic wave and ray radiation irradiation device for a battery electrode, which mainly includes an unwinding system 1, a winding system 10 and a laser radiation irradiation system 12. The battery electrode 3 is tensioned between the unwinding system 1 and the winding system 10.

[0025] The laser radiation irradiation system 12 is used to output a Gaussian laser beam and shape the Gaussian laser beam into a rectangular spot to irradiate the battery electrode 3, so as to irradiate the battery electrode 3 with laser, electromagnetic wave and ray radiation, so that the chemical reaction in the micro world inside the battery electrode 3 under the condition of light radiation can reach the desired ideal state. The laser beam includes laser, electromagnetic and ray.

[0026] The laser radiation irradiation system 12 consists of two devices, used to irradiate the A and B sides (i.e., the front and back sides) of the battery electrode with laser, electromagnetic waves, and rays. The front and back sides of the battery electrode are separated by a substrate. One of them is called the A-side laser radiation irradiation system 4, and the other is called the B-side laser radiation irradiation system 7. The A-side laser radiation irradiation system 4 is located on the A-side of the battery electrode 3 and is used to irradiate the A-side of the battery electrode 3 with laser, electromagnetic waves, and rays. The B-side laser radiation irradiation system 7 is located on the B-side of the battery electrode 3 and is used to irradiate the B-side of the battery electrode 3 with laser, electromagnetic waves, and rays.

[0027] The device further includes a winding main drive system 9 and an unwinding main drive system 2. The unwinding main drive system 2 is used to drive the unwinding of the unwinding system 1 and control the unwinding speed of the unwinding system 1. The winding main drive system 9 is used to drive the winding of the winding system 10 and control the winding speed of the winding system 10.

[0028] Among them, a plurality of roller assemblies 8 for guiding the battery electrode sheets 3 are also provided between the unwinding system 1 and the winding system 10.

[0029] In this configuration, one side of the battery electrode 3 is designated as side A, and the other side is designated as side B.

[0030] This invention uses a device that irradiates the battery electrode 3 with laser, electromagnetic waves, and rays to allow the mixture inside the electrode to fully react in the microscopic world and achieve the desired result. Data shows that under specific environmental and conditions, the internal structure of the electrode undergoes the necessary chemical reaction, and at the same time, physical reactions that affect the electrode also occur, which greatly improves the lifespan of the battery made from the electrode.

[0031] Optionally, the laser radiation irradiation system 12 is a fiber laser with a wavelength of 200–1500 nm and a power of 1000–6000 W. The power setting is 1000–6000 W, optionally 2000–4000 W. It includes, but is not limited to, any one of 1000 W, 1500 W, 2000 W, 2500 W, 3000 W, 3500 W, 4000 W, 4500 W, 5000 W, 5500 W, and 6000 W, or any range between two values, or other operating settings as needed. By adjusting or changing the laser power, the electrode speed can be adjusted through laser heating, achieving rapid heating of the electrode and improving processing efficiency. The laser includes, but is not limited to, semiconductor lasers, gas lasers, and other lasers.

[0032] Optionally, the laser radiation irradiation system 12 adopts a radiation irradiation system with a width of 4×4mm2 to 10×200mm2, but is not limited to the one currently in use; the laser radiation irradiation system 12 includes a collimation module, a uniform light module and a projection module arranged sequentially along the optical path.

[0033] Optionally, the device further includes an infrared digital temperature controller system 11, used to collect the temperature of the illuminated area of ​​the battery electrode 3 and feed the collected temperature back to the laser radiation irradiation system 12. The laser radiation irradiation system 12 is also used to control the intensity of the output laser based on the temperature of the illuminated area of ​​the battery electrode 3, so that the temperature of the illuminated area of ​​the battery electrode 3 is within a preset range. The infrared digital temperature controller system 11 is integrated with the laser radiation irradiation system to realize digital feedback between temperature control and laser radiation irradiation system, which is beneficial to the consistency and controllability of temperature inside and outside the electrode.

[0034] Optionally, the laser radiation irradiation system also integrates a focal length adjustment component 13, which is used to adjust the size of the laser spot based on the size of the battery electrode 3, so that the laser spot covers the battery electrode 3 in the width direction.

[0035] Specifically, the laser radiation irradiation system mainly adjusts the size of the light spot based on the adjustment and layout of the electrode material, and in combination with the focal length adjustment component 13, realizes the chemical reaction of radiation under suitable temperature and relative radiation.

[0036] See Figure 2 As shown, optionally, the device further includes a front roller assembly 15 and a rear roller assembly 16 for supporting and guiding the battery electrode 3, the battery electrode 3 being located between the front roller assembly 15 and the rear roller assembly 16, the front roller assembly 15 and the rear roller assembly 16 being used to make the surface of the battery electrode 3 located between the front roller assembly 15 and the rear roller assembly 16 perpendicular to the laser irradiating the surface of the battery electrode 3.

[0037] By configuring the front roller assembly 15 and the rear roller assembly 16, the electrode sheets are always arranged in a vertical or horizontal tangential position during the movement of the front roller assembly 15 and the rear roller assembly 16. This ensures that when the laser radiation irradiation system irradiates the battery electrode sheets 3, the electrode sheets are all on the same plane within the illumination range, ensuring overall radiation irradiation consistency.

[0038] Optionally, the device further includes two exhaust gas removal systems, one of which is an A-side exhaust gas removal system 5 and the other is a B-side exhaust gas removal system 6. The A-side exhaust gas removal system 5 is used to treat the exhaust gas generated by the battery electrode 3 due to the irradiation of the A-side laser radiation irradiation system 4, and the B-side exhaust gas removal system 6 is used to treat the exhaust gas generated by the battery electrode 3 due to the irradiation of the B-side laser radiation irradiation system 7.

[0039] In the above embodiment, the exhaust gas removal system collects the exhaust gas generated by laser irradiation on the battery electrode 3 by suction negative pressure, and treats the exhaust gas through the internal filtration system. The exhaust gas suction rate is the normal suction rate, which should be such that the electrode does not vibrate. The exhaust gas suction rate can be observed and finely adjusted on site. Specifically, the internal suction rate of the exhaust gas removal system is 15 m / s, the air volume is 105 m³ / h, and the external suction rate is 1~3 m / s.

[0040] Among them, see Figure 2 As shown, each of the exhaust gas removal systems includes a front exhaust gas removal chamber 14 and a rear exhaust gas removal chamber 17. The front exhaust gas removal chamber 14 covers the light-receiving surface of the battery electrode 3 and is used to treat the exhaust gas generated by laser irradiation on the light-receiving surface of the battery electrode 3. The rear exhaust gas removal chamber 17 covers the back side of the light-receiving surface of the battery electrode 3 and is used to treat the exhaust gas generated by laser irradiation on the back side of the light-receiving surface of the battery electrode 3.

[0041] When the battery electrode 3 is irradiated by a laser radiation system, it will generate unnecessary waste gas, which needs to be treated in time to avoid air pollution and affect the unnecessary chemical reactions that occur under temperature radiation, thereby affecting the internal structure of the electrode and reducing the service life of the battery electrode 3. This utility model sets up a waste gas removal system to extract or decompose the waste gas generated on the A and B sides of the battery electrode 3 in real time when irradiated by the laser radiation system, thereby avoiding the impact of waste gas on the chemical reactions of the battery electrode 3.

[0042] In practical applications, the laser radiation irradiation system 12 outputs a Gaussian laser beam, which is shaped into a usable rectangular spot and irradiates the battery electrode 3. Within the exhaust gas removal system, the infrared digital temperature controller system 11 detects the surface temperature of the battery electrode 3 and transmits the temperature to the laser radiation irradiation system. Based on the surface temperature of the battery electrode 3, the laser radiation irradiation system automatically adjusts the laser parameters, including laser wavelength, pulse width time, output power, power stability, beam quality factor, and spot size. By adjusting the laser parameters, the surface temperature of the battery electrode 3 is kept within a preset range, achieving closed-loop temperature monitoring. Under specific rays, at specific times t and belt speeds V, microscopic chemical reactions occur inside the battery electrode 3 under the conditions of light radiation, allowing the battery electrode 3 to reach the desired ideal state.

[0043] For example, in the microscopic world, the growth of lithium dendrites in battery electrode 3, the volume expansion coefficient of ions, the specific capacity of battery electrode 3, and the low electrode potential of battery electrode 3 all need to be carried out in the microscopic world.

[0044] Implementation Case B1

[0045] This embodiment also provides a method for processing the positive electrode sheet of a battery, which involves performing a deep surface treatment on the battery electrode sheet in the battery electrode heating system of embodiment B1, specifically including the following steps:

[0046] (1) Preparation of the positive electrode sheet;

[0047] (2) Nickel-cobalt-manganese (NCM) ternary material, conductive agent carbon black, polyvinylidene fluoride (PVDF) and N-methylpyrrolidone (NMP) are mixed evenly in a mass ratio of 96.9:2:1:21 to obtain a positive electrode slurry; then the positive electrode slurry is evenly coated on the positive electrode current collector aluminum foil, and then dried, cold pressed and cut to obtain the positive electrode sheet, i.e. the battery electrode sheet.

[0048] (3) Flame heating treatment of positive electrode sheet

[0049] (4) Use the obtained positive electrode sheet... Figure 1 The electrode heating system shown undergoes laser heating treatment. During the treatment, the heat generated by the laser comes into contact with the positive electrode, and the temperature is 60℃. The electrode conveyor speed is controlled at 60m / min. The electrode temperature and other conditions are recorded during the conveyor process.

[0050] Implementation Case B2

[0051] This embodiment provides a method for processing positive electrode sheets. The only difference between this embodiment and embodiment B1 is that in step 4, the electrode sheet conveying speed is controlled to be 55 m / min. The rest is the same as in embodiment B1.

[0052] Implementation Case B3

[0053] This embodiment provides a method for processing positive electrode sheets. The only difference between this embodiment and embodiment B1 is that in step 4, the electrode sheet conveying speed is controlled to be 50 m / min. The rest is the same as in embodiment B1.

[0054] Implementation Case B4

[0055] This embodiment provides a method for processing positive electrode sheets. The only difference between this embodiment and embodiment B1 is that in step 4, the electrode sheet conveying speed is controlled to be 40 m / min. The rest is the same as in embodiment B1.

[0056] Implementation Case B5

[0057] This embodiment provides a method for processing positive electrode sheets. The only difference between this embodiment and embodiment B1 is that in step 4, the electrode sheet conveying speed is controlled to be 30 m / min. The rest is the same as in embodiment B1.

[0058] Implementation Case B6

[0059] This embodiment provides a method for processing positive electrode sheets. The only difference between this embodiment and embodiment B1 is that in step 4, the electrode sheet conveying speed is controlled to be 20 m / min. The rest is the same as in embodiment B1.

[0060] Implementation Case B7

[0061] This embodiment provides a method for processing positive electrode sheets. The only difference between this embodiment and embodiment B1 is that in step 4, the electrode sheet conveying speed is controlled to be 10 m / min. The rest is the same as in embodiment B1.

[0062] Comparison Case B11

[0063] This case study compares the use of lasers of different powers to heat the electrode sheet, with the conveyor belt speed being 60 m / min, to reference the changes in surface heating of the electrode sheet under different powers. The lithium dendrite growth of the electrode sheet is then observed under a high-power microscope.

[0064] Implementation Case B21

[0065] This embodiment provides a method for processing positive electrode sheets. The only difference between this embodiment and embodiment B1 is that the power of the laser is 1500W, while the rest is the same as in embodiment B11.

[0066] Implementation Case B31

[0067] This embodiment provides a method for processing positive electrode sheets. The only difference between this embodiment and embodiment B1 is that the power of the laser is 2000W, while the rest is the same as in embodiment B11.

[0068] Implementation Case B41

[0069] This embodiment provides a method for processing positive electrode sheets. The only difference between this embodiment and embodiment B1 is that the power of the laser is 3000W, while the rest is the same as in embodiment B11.

[0070] Implementation Case B51

[0071] This embodiment provides a method for processing positive electrode sheets. The only difference between this embodiment and embodiment B1 is that the laser power is 4000W, while the rest is the same as embodiment B11.

[0072] Implementation Case B61

[0073] This embodiment provides a method for processing positive electrode sheets. The only difference between this embodiment and embodiment B1 is that the power of the laser is 5000W, while the rest is the same as in embodiment B11.

[0074] Implementation Case B71

[0075] This embodiment provides a method for processing positive electrode sheets. The only difference between this embodiment and embodiment B1 is that the power of the laser is 6000W, while the rest is the same as in embodiment B11.

[0076] Comparison Case C1

[0077] This case study compares the use of lasers with different powers to heat the electrode sheet, with the conveyor belt speed set to 20 m / min. This ensures that the surface temperature of the heated electrode sheet remains constant within a range of approximately 200°C. The laser power and conveyor belt speed are adjusted to reference the surface heating of the electrode sheet under different powers. Finally, the lithium dendrite growth of the electrode sheet is observed under a high-power microscope.

[0078] Implementation Case C2

[0079] This embodiment provides a method for processing positive electrode sheets. The only difference between this embodiment and embodiment C1 is that the laser power is 1000W and the speed is 20 m / min. The rest is the same as in embodiment C1.

[0080] Implementation Case C3

[0081] This embodiment provides a method for processing positive electrode sheets. The only difference between this embodiment and embodiment C1 is that the laser power is 1500W and the speed is 30m / min. The rest is the same as in embodiment C1.

[0082] Implementation Case C4

[0083] This embodiment provides a method for processing positive electrode sheets. The only difference between this embodiment and embodiment C1 is that the laser power is 2000W and the speed is 40 m / min. The rest is the same as in embodiment C1.

[0084] Implementation Case C5

[0085] This embodiment provides a method for processing positive electrode sheets. The only difference between this embodiment and embodiment C1 is that the laser power is 2500W and the speed is 50 m / min. The rest is the same as in embodiment C1.

[0086] Implementation Case C6

[0087] This embodiment provides a method for processing positive electrode sheets. The only difference between this embodiment and embodiment C1 is that the laser power is 3000W and the speed is 60 m / min. The rest is the same as in embodiment C1.

[0088] Implementation Case C7

[0089] This embodiment provides a method for processing positive electrode sheets. The only difference between this embodiment and embodiment C1 is that the laser power is 3500W and the speed is 70 m / min. The rest is the same as in embodiment C1.

[0090] Implementation Case C8

[0091] This embodiment provides a method for processing positive electrode sheets. The only difference between this embodiment and embodiment C1 is that the laser power is 4000W and the speed is 80 m / min. Otherwise, they are the same as in embodiment C1.

[0092] Implementation Case C9

[0093] This embodiment provides a method for processing positive electrode sheets. The only difference between this embodiment and embodiment C1 is that the laser power is 5000W and the speed is 90 m / min. Otherwise, they are the same as in embodiment C1.

[0094] Implementation Case C10

[0095] This embodiment provides a method for processing positive electrode sheets. The only difference between this embodiment and embodiment C1 is that the laser power is 6000W and the speed is 100m / min. The rest is the same as in embodiment C1.

[0096] Comparison Case C11

[0097] This case study compares the use of lasers with different powers to heat the electrode sheet, with the conveyor belt speed always at 10 m / min. This ensures that the surface temperature of the heated electrode sheet remains constant within a range of approximately 400°C. The laser power and conveyor belt speed are adjusted to reference the surface heating of the electrode sheet under different powers. Finally, the lithium dendrite growth of the electrode sheet is observed under a high-power microscope.

[0098] Implementation Case C21

[0099] This embodiment provides a method for processing positive electrode sheets. The only difference between this embodiment and embodiment C11 is that the laser power is 1000W and the speed is 10 m / min. The rest is the same as embodiment C11.

[0100] Implementation Case C31

[0101] This embodiment provides a method for processing positive electrode sheets. The only difference between this embodiment and embodiment C11 is that the laser power is 1500W and the speed is 15 m / min. The rest is the same as embodiment C11.

[0102] Implementation Case C41

[0103] This embodiment provides a method for processing positive electrode sheets. The only difference between this embodiment and embodiment C11 is that the laser power is 2000W and the speed is 20 m / min. The rest is the same as embodiment C11.

[0104] Implementation Case C51

[0105] This embodiment provides a method for processing positive electrode sheets. The only difference between this embodiment and embodiment C11 is that the laser power is 2500W and the speed is 25m / min. The rest is the same as embodiment C11.

[0106] Implementation Case C61

[0107] This embodiment provides a method for processing positive electrode sheets. The only difference between this embodiment and embodiment C11 is that the laser power is 3000W and the speed is 30 m / min. The rest is the same as embodiment C11.

[0108] Implementation Case C71

[0109] This embodiment provides a method for processing positive electrode sheets. The only difference between this embodiment and embodiment C11 is that the laser power is 3500W and the speed is 35 m / min. The rest is the same as embodiment C11.

[0110] Implementation Case C81

[0111] This embodiment provides a method for processing positive electrode sheets. The only difference between this embodiment and embodiment C11 is that the laser power is 4000W and the speed is 40 m / min. The rest is the same as embodiment C11.

[0112] Implementation Case C91

[0113] This embodiment provides a method for processing positive electrode sheets. The only difference between this embodiment and embodiment C11 is that the laser power is 5000W and the speed is 45 m / min. The rest is the same as embodiment C11.

[0114] Implementation Case C101

[0115] This embodiment provides a method for processing positive electrode sheets. The only difference between this embodiment and embodiment C11 is that the laser power is 6000W and the speed is 50 m / min. Otherwise, they are the same as in embodiment C11.

[0116] Table 1 shows the electrode processing conditions for each example and comparative example.

[0117]

[0118] Table 1

[0119] Table 2 shows the electrode processing conditions for each example and comparative example.

[0120]

[0121] Table 2

[0122] Table 3 shows the electrode processing conditions for each example and comparative example.

[0123]

[0124] Table 3

[0125] Table 4 shows the electrode processing conditions for each example and comparative example.

[0126]

[0127] Table 4

[0128] The test results show that:

[0129] Electrodes from Implementation Cases B1 to B7, B11 to B71, C1 to C10, and C11 to C101, after undergoing laser heating treatment under suitable conditions, were subjected to professional testing instruments and comparative experiments. Based on the experimental data, we can make relevant comparisons. The lithium dendrite growth of the laser-heated electrodes was examined sequentially under a professional microscope. The lithium dendrite growth is then compared with that shown in Tables 1 to 4.

[0130] Under laser heating, we can see the volume expansion coefficient of ions in the electrode. In Tables 1 to 4, the expansion coefficient is mainly related to temperature. However, when observing a single layer of the electrode, the volume expansion coefficient of ions does not change significantly.

[0131] Implementation Case E1

[0132] This embodiment provides a method for processing electrode batteries, which involves conducting long-term charge-discharge experiments on the electrode batteries in embodiment E1 in a laboratory, specifically including the following steps:

[0133] (1) The finished state of the battery electrode sheets and the use of the model battery

[0134] (2) The battery electrode model is placed in the corresponding test field for extreme use and extreme charging to collect the volume expansion state of the corresponding ions and obtain relevant data.

[0135] (3) The power of the laser used for heating the battery electrode is 3000W.

[0136] Implementation Case E2

[0137] This embodiment provides a method for processing electrode batteries. The only difference between this embodiment and embodiment E1 is the number of charging cycles. The number of charging cycles is 300n, and the rest is the same as embodiment E1.

[0138] Implementation Case E3

[0139] This embodiment provides a method for processing electrode batteries. The only difference between this embodiment and embodiment E1 is the number of charging cycles (500n). Otherwise, they are the same as embodiment E1.

[0140] Implementation Case E4

[0141] This embodiment provides a method for processing electrode batteries. The only difference between this embodiment and embodiment E1 is the number of charging cycles (1000n). Otherwise, they are the same as embodiment E1.

[0142] Implementation Case E5

[0143] This embodiment provides a method for processing electrode batteries. The only difference between this embodiment and embodiment E1 is the number of charging cycles (2000n). Otherwise, they are the same as embodiment E1.

[0144] Implementation Case E6

[0145] This embodiment provides a method for processing electrode batteries. The only difference between this embodiment and embodiment E1 is the number of charging cycles (3000n). Otherwise, they are the same as embodiment E1.

[0146] Table 5 shows the ion expansion of the electrodes in each example and comparative example under different charging cycles.

[0147]

[0148] Table 5

[0149] Based on relevant experimental data from implementation cases E1 to E6, it can be assessed that the ionic expansion coefficient of the electrode is related to the number of charge-discharge cycles of the battery, but an indirect correlation with temperature was also found. Further long-term monitoring is needed to verify this.

[0150] In this embodiment of the invention, the working distance of the laser in the laser radiation irradiation system is adjustable at 300 / 400 / 700mm, and the corresponding spot length and width are 2-20 / 20-100 / 100-200mm, the spot uniformity (width direction) is greater than 95%, and the light transmission efficiency is greater than 90%.

[0151] In summary, this invention features a novel design, a simple and reliable structure, low energy loss, and low energy consumption. It utilizes a continuous fiber laser beam to irradiate the electrode under specific radiation, causing microscopic chemical reactions both inside and outside the electrode at a specific temperature. This alters the molecular structure of the electrode, significantly extending its lifespan when used in battery manufacturing. This structure can be adapted to different production processes, but requires adjustment of the irradiation parameters.

[0152] It should be noted that the scheme for which protection is sought in this utility model is related to the selection and connection relationship of various hardware devices. Those skilled in the art, upon learning of the hardware scheme of this application, can obtain the corresponding program without any objection. Therefore, the scheme for which protection is sought in this application does not involve any improvement of the program.

[0153] 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. A radiation irradiation device for battery electrodes using lasers, electromagnetic waves, and rays, characterized in that, It includes an unwinding system, a winding system, and a laser radiation irradiation system for irradiating the battery electrode with laser, electromagnetic waves, and rays, with the battery electrode tensioned between the unwinding system and the winding system. The laser radiation irradiation system comprises two systems: an A-side laser radiation irradiation system and a B-side laser radiation irradiation system. The A-side laser radiation irradiation system is located on the A-side of the battery electrode and is used to irradiate the A-side of the battery electrode with laser, electromagnetic waves, and rays. The B-side laser radiation irradiation system is located on the B-side of the battery electrode and is used to irradiate the B-side of the battery electrode with laser, rays, and electromagnetic waves.

2. The radiation irradiation device for battery electrodes according to claim 1, characterized in that, The device further includes a take-up main drive system and an unwinding main drive system. The unwinding main drive system is used to drive the unwinding of the unwinding system and control the unwinding speed of the unwinding system. The take-up main drive system is used to drive the take-up of the take-up system and control the take-up speed of the take-up system.

3. The radiation irradiation device for battery electrodes according to claim 1, characterized in that, The device also includes a waste gas removal system for treating the waste gas generated by the laser radiation irradiation system on the battery electrode. There are two waste gas removal systems: one is an A-side waste gas removal system for treating the waste gas generated by the A-side laser radiation irradiation system on the battery electrode, and the other is a B-side waste gas removal system for treating the waste gas generated by the B-side laser radiation irradiation system on the battery electrode.

4. The radiation irradiation device for battery electrodes according to claim 3, characterized in that, Each of the aforementioned exhaust gas removal systems includes a front exhaust gas removal chamber and a rear exhaust gas removal chamber. The front exhaust gas removal chamber covers the illuminated surface of the battery electrode and is used to treat the exhaust gas generated on the illuminated surface of the battery electrode due to laser irradiation. The rear exhaust gas removal chamber covers the back side of the illuminated surface of the battery electrode and is used to treat the exhaust gas generated on the back side of the illuminated surface of the battery electrode due to laser irradiation.

5. The radiation irradiation device for battery electrodes according to claim 1, characterized in that, The device also includes a front roller assembly and a rear roller assembly for supporting and guiding the battery electrode sheet, wherein the irradiated surface of the battery electrode sheet is located between the front roller assembly and the rear roller assembly, and the surface of the battery electrode sheet located between the front roller assembly and the rear roller assembly is perpendicular to the laser irradiating the surface of the battery electrode sheet.

6. The radiation irradiation device for battery electrodes according to claim 1, characterized in that, The radiation irradiation device also includes an infrared digital temperature controller system, which is integrated into the laser radiation irradiation system to collect the temperature of the irradiated area of ​​the battery electrode and feed the collected temperature back to the laser radiation irradiation system.

7. The radiation irradiation device for battery electrodes according to claim 1, characterized in that, The laser radiation irradiation system also integrates a focal length adjustment component, which is used to adjust the size of the laser spot based on the size of the battery electrode, so that the laser spot covers the battery electrode in the width direction.

8. The radiation irradiation device for battery electrodes according to claim 1, characterized in that, The laser radiation irradiation system includes a fiber laser.

9. The radiation irradiation device for battery electrodes according to claim 8, characterized in that, The fiber laser has a wavelength of 200–1500 nm and a power of 1000–6000 W. The fiber laser is a semiconductor laser or a gas laser.

10. The radiation irradiation device for battery electrodes according to claim 1, characterized in that, The laser radiation irradiation system includes a collimation module, a light homogenizing module, and a light projection module arranged sequentially along the optical path.

Images