A surface density detection device

Abstract

This utility model discloses an areal density detection device, including a mounting base, a cutting and sampling device, a weighing sensor, a material box, and a controller. The cutting and sampling device is connected to the mounting base and is used to punch battery electrodes to obtain samples. The cutting and sampling device has a material discharge channel through which the punched samples fall. The mounting base has an upward-facing mounting groove, and the weighing sensor is installed in the mounting groove. The material box is placed on the weighing sensor and located below the material discharge channel. The material box is used to receive the samples falling from the material discharge channel, and the weight of the samples in the material box is measured by the weighing sensor. This utility model can reduce the time required for areal density detection, improve the efficiency of areal density detection, and also avoid sample drop, material spillage, material adhesion, and dust contamination, thereby improving the accuracy of sample weighing and thus improving the accuracy of areal density detection.

Description

Technical Field

[0001] This utility model relates to a surface density detection device. Background Technology

[0002] Currently, areal density refers to the mass per unit area. Battery electrodes require areal density testing during the coating process. Existing methods involve cutting the battery electrodes using a cutting die to obtain samples, transferring the samples to an analytical balance for weighing, and then entering the weight into a computer to calculate the areal density. However, the cutting die and the analytical balance are separated by a certain distance. Transferring the sample from the cutting die to the analytical balance, weighing it, and entering the weight into the computer takes considerable time, increasing the time required for areal density testing and reducing its efficiency. Furthermore, there are risks of sample drop, material spillage, adhesion, or dust contamination during sample transfer, all of which affect the accuracy of the weighing and consequently the accuracy of the areal density test results. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a areal density detection device that can reduce the time required for areal density detection, improve the efficiency of areal density detection, avoid sample falling, material dropping, material sticking and dust contamination, improve the accuracy of sample weighing and thus improve the accuracy of areal density detection.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is: a surface density detection device, including a mounting base, a cutting and sampling device, a weighing sensor, a material box and a controller;

[0005] The cutting and sampling device is connected to the mounting base and is used to punch battery electrode sheets to obtain samples. The cutting and sampling device is provided with a material drop channel through which the punched samples fall.

[0006] The mounting base has an upward-facing mounting groove, and the weighing sensor is installed in the mounting groove.

[0007] The material box is placed on the weighing sensor and located below the material drop channel. The material box is used to receive the sample falling from the material drop channel and then the weight of the sample in the material box is measured by the weighing sensor.

[0008] The weighing sensor is connected to the controller and is used to send the weight of the weighed sample to the controller, which is used to obtain the areal density of the battery electrode based on the weight of the sample.

[0009] Further, a specific structure of a cutting and sampling device is provided, the cutting and sampling device including an upper mold base, a lower mold base, a cutting punch, a cutting die, and a driving component;

[0010] The lower mold base is connected to the mounting base, and the mounting groove is located below the lower mold base;

[0011] The cutting die is connected to the upper end of the lower die base. The cutting die has a first through hole, and the lower die base has a second through hole. The first through hole and the second through hole communicate to form the blanking channel.

[0012] The upper mold base is slidably disposed in the vertical direction;

[0013] The cutting punch is connected to the lower end of the upper die base, and the cutting punch is located above the cutting die.

[0014] The driving component is connected to the mounting base and is connected to the upper die base. The driving component is used to drive the upper die base to move downward, thereby driving the cutting punch to move downward until it closes with the cutting die, thereby punching the battery electrode sheet to obtain a sample.

[0015] Furthermore, the lower mold base is provided with a receiving channel for the material box to extend into. The receiving channel is located above the mounting groove and below the second through hole. The material box is used to extend into the receiving channel and then be placed on the weighing sensor in the mounting groove and located below the second through hole in the material dropping channel.

[0016] A further specific structure of a material box is provided, the material box including a box body and a handle connected to the box body, the box body being used to extend into the receiving channel and be placed on the weighing sensor and located below the second through hole, the handle being exposed outside the receiving channel.

[0017] Furthermore, a specific structure for the mounting base is provided, the mounting base including a base, a top seat, and a vertical plate;

[0018] The lower end of the upright plate is connected to the base, and the top seat is connected to the upper end of the upright plate;

[0019] The lower mold base is connected to the upper end of the base, and the mounting groove is provided in the base;

[0020] The drive component is connected to the top seat.

[0021] Furthermore, at least two guide pillars are connected to the lower mold base, and guide sleeves corresponding to the guide pillars are connected to the upper mold base, with the guide sleeves slidingly connected to the corresponding guide pillars.

[0022] Furthermore, the driving component is a hydraulic cylinder.

[0023] Furthermore, a pressing mechanism is connected to the upper mold base. During the process of the driving component driving the upper mold base to move downward, thereby driving the pressing mechanism and the cutting punch to move downward, the pressing mechanism first descends to press and fix the battery electrode sheet on the cutting die, and then the cutting punch descends to close with the cutting die.

[0024] A further specific structure of a pressing mechanism is provided, the pressing mechanism including a pressing plate, at least two slide rods and a compression spring corresponding to each slide rod;

[0025] The upper mold base is provided with sliding through holes corresponding to the slide rods, and the sliding through holes are provided with stepped surfaces facing upwards;

[0026] The slide rod is slidably installed in the corresponding sliding through hole in the up and down direction, and the upper end of the slide rod is provided with a boss portion that protrudes radially outward and is located above the stepped surface;

[0027] The pressure plate is connected to the lower end of the slide rod. The pressure plate is located below the upper die base and above the cutting die. When the driving component drives the upper die base to move upward into position, the boss abuts against the step surface and the lower end surface of the pressure plate is lower than the lower end of the cutting punch.

[0028] The compression spring is sleeved on the corresponding slide rod, the upper end of the compression spring abuts against the upper mold base, and the lower end of the compression spring abuts against the pressure plate.

[0029] Furthermore, the pressure plate surrounds the outside of the cutting punch.

[0030] The above technical solution involves the cutting and sampling device first punching battery electrode sheets to obtain samples. These samples fall through the material feeding channel into a material box. Then, the weighing sensor weighs the sample in the material box and sends the weight to the controller. The controller can then determine the areal density of the battery electrode sheets based on the sample weight. The areal density is obtained by dividing the sample weight by the sample area. The area of ​​the sample obtained by the cutting and sampling device is fixed each time it punches a battery electrode sheet, and this area is known. In this embodiment, the punched sample falls directly into the material box on the weighing sensor and is weighed immediately. The weighing data is then immediately sent to the controller to obtain the areal density of the battery electrode sheets. Compared with existing technologies, this eliminates the need to transfer samples or record weights, significantly reducing the time required for areal density detection and improving its efficiency. Furthermore, since sample transfer is unnecessary, sample dropping, spillage, adhesion, and dust contamination can be avoided, thereby improving the accuracy of sample weighing and consequently, the accuracy of areal density detection. In this embodiment, the weighing sensor has an accuracy of 0.0001g. Such a high-precision weighing sensor is susceptible to instability caused by airflow in the environment. Therefore, placing the weighing sensor in the mounting groove and placing the material box above it, so that the weighing sensor is surrounded by the material box and mounting base, minimizes the impact of airflow on the weighing sensor's accuracy, and further improves the accuracy of areal density detection. Attached Figure Description

[0031] Figure 1 This is a front view of the areal density detection device of this utility model;

[0032] Figure 2 This is a front sectional view of the areal density detection device of this utility model;

[0033] Figure 3 This is a side sectional view of the areal density detection device of this utility model;

[0034] In the diagram: 1. Mounting base; 2. Weighing sensor; 3. Material box; 4. Battery electrode; 5. Material feeding channel; 6. Mounting groove; 7. Upper mold base; 8. Lower mold base; 9. Cutting punch; 10. Cutting die; 11. Drive component; 12. First through hole; 13. Second through hole; 14. Material receiving channel; 15. Box body; 16. Handle; 17. Base; 18. Top seat; 19. Vertical plate; 20. Guide post; 21. Pressure plate; 22. Slide rod; 23. Compression spring; 24. Sliding through hole; 25. Stepped surface; 26. Boss. Detailed Implementation

[0035] To make the contents of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0036] like Figures 1-3 As shown, a surface density detection device includes a mounting base 1, a cutting and sampling device, a weighing sensor 2, a material box 3, and a controller;

[0037] The cutting and sampling device is connected to the mounting base 1 and is used to punch the battery electrode sheet 4 to obtain a sample. The cutting and sampling device is provided with a material drop channel 5 through which the punched sample falls.

[0038] The mounting base 1 is provided with an upward-facing mounting groove 6, and the weighing sensor 2 is installed in the mounting groove 6;

[0039] The material box 3 is placed on the weighing sensor 2 and located below the material drop channel 5. The material box 3 is used to receive the sample falling from the material drop channel 5 and then the weighing sensor 2 weighs the sample in the material box 3.

[0040] The weighing sensor 2 is connected to the controller and is used to send the weight of the weighed sample to the controller. The controller is used to obtain the areal density of the battery electrode 4 based on the weight of the sample.

[0041] Specifically, the cutting and sampling device first punches the battery electrode sheet 4 to obtain a sample. The sample falls from the material feeding channel 5 and into the material box 3. Then, the weighing sensor 2 weighs the sample in the material box 3 and sends the weighed weight to the controller. The controller can obtain the areal density of the battery electrode sheet 4 based on the weight of the sample. The areal density of the battery electrode sheet 4 is obtained by dividing the weight of the sample by the area of ​​the sample. The area of ​​the sample obtained by the cutting and sampling device each time the battery electrode sheet 4 is punched is fixed and known. In this embodiment, the punched sample can fall directly into the material box 3 on the weighing sensor 2 and be weighed directly. After weighing, the data is immediately sent to the controller to obtain the areal density of the battery electrode sheet 4. Compared with the prior art, it is not necessary to transfer the sample or record the weight, which greatly reduces the time required for areal density detection and improves the efficiency of areal density detection. Furthermore, since sample transfer is not required, sample drop, spillage, adhesion, and dust contamination can be avoided, thereby improving the accuracy of sample weighing and consequently, the accuracy of areal density detection. In this embodiment, the weighing sensor 2 has an accuracy of 0.0001g. Such a high-precision weighing sensor 2 is susceptible to instability due to airflow in the environment. Therefore, placing the weighing sensor 2 in the mounting groove 6 and placing the material box 3 above it, so that the weighing sensor 2 is surrounded by the material box 3 and the mounting base 1, minimizes the impact of airflow on the accuracy of the weighing sensor 2, and further improves the accuracy of areal density detection.

[0042] like Figures 1-3 As shown, the cutting and sampling device may include an upper die base 7, a lower die base 8, a cutting punch 9, a cutting die 10, and a driving component 11;

[0043] The lower mold base 8 is connected to the mounting base 1, and the mounting groove 6 is located below the lower mold base 8;

[0044] The cutting die 10 is connected to the upper end of the lower die base 8. The cutting die 10 is provided with a first through hole 12, and the lower die base 8 is provided with a second through hole 13. The first through hole 12 and the second through hole 13 communicate to form the blanking channel 5.

[0045] The upper mold base 7 is slidably disposed in the vertical direction;

[0046] The cutting punch 9 is connected to the lower end of the upper die base 7, and the cutting punch 9 is located above the cutting die 10;

[0047] The driving component 11 is connected to the mounting base 1. The driving component 11 is connected to the upper mold base 7 and is used to drive the upper mold base 7 to move downward, thereby driving the cutting punch 9 to move downward until it closes with the cutting die 10, thus punching the battery electrode 4 to obtain a sample. Specifically, when the mold is closed, the cutting punch 9 will extend downward into the first through hole 12, and the cut sample will pass downward through the first through hole 12 and the second through hole 13 and then fall into the material box 3 below. More specifically, the dimensions of the cutting punch 9 and the cutting die 10 are fixed. Therefore, the area of ​​the sample punched when the cutting punch 9 and the cutting die 10 are closed is also a known fixed value. The area of ​​the sample can be calculated based on the diameter of the cutting punch 9.

[0048] like Figures 1-3 As shown, the lower die base 8 is provided with a receiving channel 14 for the material box 3 to extend into. The receiving channel 14 is located above the mounting groove 6 and below the second through hole 13. The material box 3 is inserted into the receiving channel 14 and placed on the weighing sensor 2 in the mounting groove 6, located below the second through hole 13 in the dropping channel 5. Specifically, before punching the battery electrode sheet 4, the material box 3 is first inserted into the receiving channel 14 and placed on the weighing sensor 2. At this time, the material box 3 is located below the second through hole 13 in the dropping channel 5. The battery electrode sheet 4 is placed between the cutting die 10 and the cutting punch 9. Then, the driving component 11 drives the upper die base 7 to move downward, thereby driving the cutting punch 9 to move downward, so that the cutting punch 9 and the cutting die 10 close together to punch the battery electrode sheet 4 to obtain a sample. The sample falls downwards, passing through the first through hole 12 and the second through hole 13, and then lands in the material box 3. The sample in the material box 3 is then weighed by the weighing sensor 2, which sends the weight to the controller, which calculates the areal density of the battery electrode 4. After the areal density detection is completed, the material box 3 can be removed from the receiving channel 14, and then the sample can be removed from the material box 3.

[0049] like Figures 1-3 As shown, the material box 3 may include a box body 15 and a handle 16 connected to the box body 15. The box body 15 is used to extend into the receiving channel 14 and be placed on the weighing sensor 2 and located below the second through hole 13. The handle 16 protrudes outside the receiving channel 14.

[0050] like Figures 1-3 As shown, the mounting base 1 may include a base 17, a top base 18, and a vertical plate 19;

[0051] The lower end of the upright plate 19 is connected to the base 17, and the top seat 18 is connected to the upper end of the upright plate 19.

[0052] The lower mold base 8 is connected to the upper end of the base 17, and the mounting groove 6 is provided in the base 17;

[0053] The drive component 11 is connected to the top base 18; in this embodiment, two upright plates 19 are provided on the left and right sides; specifically, the weighing sensor 2 is surrounded by the base 17 on all sides and below, and a material box 3 is placed on top of the weighing sensor 2. The material box 3 and the base 17 can surround the weighing sensor 2 in order to reduce the influence of airflow in the environment on the accuracy of the weighing sensor 2.

[0054] like Figures 1-3 As shown, at least two guide pillars 20 are connected to the lower mold base 8, and guide sleeves corresponding to each guide pillar 20 are connected to the upper mold base 7. The guide sleeves are slidably connected to the corresponding guide pillars 20, thereby allowing the upper mold base 7 to slide in the vertical direction. In this embodiment, the driving component 11 can be a hydraulic cylinder.

[0055] like Figures 1-3 As shown, a pressing mechanism can be connected to the upper mold base 7. During the process of the driving component 11 driving the upper mold base 7 to move downward, thereby driving the pressing mechanism and the cutting punch 9 to move downward, the pressing mechanism first descends to press and fix the battery electrode 4 on the cutting die 10, and then the cutting punch 9 descends to close with the cutting die 10.

[0056] like Figures 1-3 As shown, the pressing mechanism may include a pressing plate 21, at least two slide rods 22, and a compression spring 23 corresponding to each slide rod 22;

[0057] The upper mold base 7 is provided with sliding through holes 24 corresponding to the slide rods 22, and the sliding through holes 24 are provided with upward-facing stepped surfaces 25;

[0058] The slide rod 22 is slidably installed in the corresponding sliding through hole 24 in the up and down direction. The upper end of the slide rod 22 is provided with a boss portion 26 that protrudes radially outward and is located above the stepped surface 25.

[0059] The pressure plate 21 is connected to the lower end of the slide bar 22. The pressure plate 21 is located below the upper die base 7 and above the cutting die 10. When the driving component 11 drives the upper die base 7 to move upward into place, the boss 26 abuts against the step surface 25 and the lower end surface of the pressure plate 21 is lower than the lower end of the cutting punch 9.

[0060] The compression spring 23 is sleeved on the corresponding slide rod 22. The upper end of the compression spring 23 abuts against the upper mold base 7, and the lower end of the compression spring 23 abuts against the pressure plate 21.

[0061] like Figures 1-3 As shown, the pressure plate 21 surrounds the outside of the cutting punch 9.

[0062] Specifically, when punching the battery electrode 4, the battery electrode 4 is first placed between the cutting die 10 and the pressure plate 21. Then, the driving component 11 drives the upper die base 7 to move downward, thereby driving the cutting punch 9 and the pressure plate 21 to move downward. The pressure plate 21 then presses and fixes the battery electrode 4 onto the cutting die 10. The upper die base 7 and the cutting punch 9 continue to move downward to compress the clamping spring 23. Then, the cutting punch 9 and the cutting die 10 close together to punch the battery electrode 4 and obtain a sample. After the sample punching is completed, the driving component 11 drives the upper die base 7 to move upward, thereby driving the cutting punch 9 to move upward to separate from the cutting die 10. When the boss 26 on the slide rod 22 abuts against the step surface 25, the upper die base 7 moves upward together with the slide rod 22 and the pressure plate 21, thereby causing the pressure plate 21 to release the battery electrode 4.

[0063] In summary, the cutting and sampling device first punches the battery electrode sheet 4 to obtain a sample. The sample falls from the material feeding channel 5 and into the material box 3. Then, the weighing sensor 2 weighs the sample in the material box 3 and sends the weighed weight to the controller. The controller can obtain the areal density of the battery electrode sheet 4 based on the weight of the sample. The areal density of the battery electrode sheet 4 is obtained by dividing the weight of the sample by the area of ​​the sample. The area of ​​the sample obtained by the cutting and sampling device each time the battery electrode sheet 4 is punched is fixed and known. In this embodiment, the punched sample can fall directly into the material box 3 on the weighing sensor 2 and be weighed directly. After weighing, the data is immediately sent to the controller to obtain the areal density of the battery electrode sheet 4. Compared with the prior art, it is not necessary to transfer the sample or record the weight, which greatly reduces the time required for areal density detection and improves the efficiency of areal density detection. Furthermore, since sample transfer is not required, sample drop, spillage, adhesion, and dust contamination can be avoided, thereby improving the accuracy of sample weighing and consequently, the accuracy of areal density detection. In this embodiment, the weighing sensor 2 has an accuracy of 0.0001g. Such a high-precision weighing sensor 2 is susceptible to instability due to airflow in the environment. Therefore, placing the weighing sensor 2 in the mounting groove 6 and placing the material box 3 above it, so that the weighing sensor 2 is surrounded by the material box 3 and the mounting base 1, minimizes the impact of airflow on the accuracy of the weighing sensor 2, and further improves the accuracy of areal density detection.

[0064] The specific embodiments described above further illustrate the technical problems, technical solutions, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An areal density detection device, characterized by, It includes a mounting base (1), a cutting and sampling device, a weighing sensor (2), a material box (3), and a controller; The cutting and sampling device is connected to the mounting base (1) and is used to punch the battery electrode (4) to obtain a sample. The cutting and sampling device is provided with a material drop channel (5) through which the punched sample falls. The mounting base (1) is provided with an upward-facing mounting groove (6), and the weighing sensor (2) is installed in the mounting groove (6); The material box (3) is placed on the weighing sensor (2) and located below the material drop channel (5). The material box (3) is used to receive the sample falling from the material drop channel (5) and then the weighing sensor (2) weighs the sample in the material box (3). The weighing sensor (2) is connected to the controller and is used to send the weight of the weighed sample to the controller, which is used to obtain the areal density of the battery electrode (4) based on the weight of the sample.

2. The areal density detection apparatus according to claim 1, characterized by The cutting and sampling device includes an upper mold base (7), a lower mold base (8), a cutting punch (9), a cutting die (10), and a driving component (11). The lower mold base (8) is connected to the mounting base (1), and the mounting groove (6) is located below the lower mold base (8); The cutting die (10) is connected to the upper end of the lower die base (8). The cutting die (10) is provided with a first through hole (12), and the lower die base (8) is provided with a second through hole (13). The first through hole (12) and the second through hole (13) communicate to form the blanking channel (5). The upper mold base (7) is slidably disposed in the vertical direction; The cutting punch (9) is connected to the lower end of the upper die base (7), and the cutting punch (9) is located above the cutting die (10); The driving component (11) is connected to the mounting base (1). The driving component (11) is connected to the upper mold base (7) and is used to drive the upper mold base (7) to move downward, thereby driving the cutting punch (9) to move downward to close with the cutting die (10) and then punch the battery electrode (4) to obtain a sample.

3. The areal density detection apparatus according to claim 2, characterized by The lower mold base (8) is provided with a receiving channel (14) for the material box (3) to extend into. The receiving channel (14) is located above the mounting groove (6) and below the second through hole (13). The material box (3) is used to extend into the receiving channel (14) and then be placed on the weighing sensor (2) in the mounting groove (6) and located below the second through hole (13) in the dropping channel (5).

4. The areal density detection apparatus according to claim 3, characterized by The material box (3) includes a box body (15) and a handle (16) connected to the box body (15). The box body (15) is used to extend into the receiving channel (14) and then be placed on the weighing sensor (2) and located below the second through hole (13). The handle (16) protrudes outside the receiving channel (14).

5. The areal density detection apparatus according to claim 2, wherein The mounting base (1) includes a base (17), a top base (18), and a vertical plate (19); The lower end of the upright plate (19) is connected to the base (17), and the top seat (18) is connected to the upper end of the upright plate (19); The lower mold base (8) is connected to the upper end of the base (17), and the mounting groove (6) is provided in the base (17); The drive component (11) is connected to the top seat (18).

6. The areal density detection apparatus according to claim 2, wherein At least two guide pillars (20) are connected to the lower mold base (8), and guide sleeves corresponding to the guide pillars (20) are connected to the upper mold base (7). The guide sleeves are slidably connected to the corresponding guide pillars (20).

7. The areal density detection device according to claim 2, characterized in that, The driving component (11) is a hydraulic cylinder.

8. The areal density detection device according to claim 2, characterized in that, The upper mold base (7) is connected to a pressing mechanism. When the driving component (11) drives the upper mold base (7) to move downward, thereby driving the pressing mechanism and the cutting punch (9) to move downward, the pressing mechanism first descends to press and fix the battery electrode (4) on the cutting die (10), and then the cutting punch (9) descends to close with the cutting die (10).

9. The areal density detection device according to claim 8, characterized in that, The pressing mechanism includes a pressing plate (21), at least two slide rods (22), and a pressing spring (23) corresponding to each slide rod (22). The upper mold base (7) is provided with sliding through holes (24) corresponding to the slide rod (22), and the sliding through holes (24) are provided with upward-facing stepped surfaces (25). The slide rod (22) is slidably installed in the corresponding sliding through hole (24) in the up and down direction. The upper end of the slide rod (22) is provided with a boss (26) that protrudes radially outward and is located above the stepped surface (25). The pressure plate (21) is connected to the lower end of the slide rod (22). The pressure plate (21) is located below the upper die base (7) and above the cutting die (10). When the driving component (11) drives the upper die base (7) to move upward into place, the boss (26) abuts against the step surface (25) and the lower end face of the pressure plate (21) is lower than the lower end of the cutting punch (9). The compression spring (23) is sleeved on the corresponding slide rod (22). The upper end of the compression spring (23) abuts against the upper mold base (7), and the lower end of the compression spring (23) abuts against the pressure plate (21).

10. The areal density detection device according to claim 9, characterized in that, The pressure plate (21) surrounds the outside of the cutting punch (9).

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