Pole piece adhesion stress test pretreatment device

Abstract

The utility model discloses a pole piece cohesive force test pretreatment device, which relates to the technical field of lithium ion batteries, and comprises a base, a scale-free steel plate is arranged in the middle of the upper end of the base, two clamping slots are arranged on the scale-free steel plate, a rubberizing position is arranged between the two clamping slots, and the rubberizing position is arranged between the two clamping slots. A fixing piece used for fixing a scale-free steel plate is installed at the upper end of the base, a supporting frame is fixed to the rear side of the upper end of the base, the upper end of the supporting frame is fixedly connected with a downward-pressing supporting frame through an extension spring, and a die with a blade is fixed to the downward-pressing supporting frame and located above the scale-free steel plate. According to the utility model, the blade of the blade-containing die corresponds to the clamping slot on the scale-free steel plate, so that the rapid and accurate cutting of a sample is realized, the operation is simple, the blade can cut along the path of the clamping slot, and the cutting error caused by manual operation or inaccurate positioning is avoided.

Description

Technical Field

[0001] This utility model relates to the field of lithium-ion battery technology, specifically to a pretreatment device for testing electrode adhesion strength. Background Technology

[0002] Accurate testing of electrode adhesion is crucial for evaluating and optimizing the bonding performance of lithium-ion batteries. This testing not only helps us understand the effectiveness of binders but also allows us to monitor the quality of production processes such as slurry preparation and coating, thus providing key data support for optimizing the production process and improving battery performance.

[0003] Currently, the industry commonly uses tensile testing to quantitatively evaluate the adhesion of electrode sheets. The traditional method involves cutting the electrode to a specific width using a cutter, then fixing it to a non-gradient steel plate using double-sided tape, and finally performing a tensile test to measure the peel force.

[0004] In traditional methods, manually cutting electrode sheets is an extremely challenging task because variations in operator skill and experience often lead to difficulties in ensuring the accuracy and consistency of the cuts. This cutting error can not only cause deviations in sample dimensions, thus affecting the accuracy of subsequent tests, but also the problem of powder shedding from the electrode edges can become a key factor affecting test accuracy. Powder shedding is likely directly related to the cutting technique used; these tiny powder particles detached from the electrode edges can form stress concentration points during tensile testing, leading to unstable and inaccurate test results and introducing uncertainty into the performance evaluation of lithium-ion batteries.

[0005] Based on this, a pretreatment device for electrode adhesion testing is now provided, which can eliminate the drawbacks of existing devices. Utility Model Content

[0006] The purpose of this invention is to provide a pretreatment device for testing electrode adhesion to solve the problems in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A pretreatment device for electrode adhesion testing includes a base, on the upper center of which a non-gradient steel plate is placed. Two slots are formed on the non-gradient steel plate, with an adhesive application position between the two slots. A fixing component for fixing the non-gradient steel plate is installed on the upper end of the base. A support frame is fixed to the rear side of the upper end of the base. A lower support frame is fixedly connected to the upper end of the support frame by a tension spring. A die containing a blade is fixed on the lower support frame, and the die containing the blade is located above the non-gradient steel plate.

[0009] Preferably, the fixing component includes four steel plate fixing clips, which are respectively located at the four corners of the unmarked steel plate, and the four steel plate fixing clips are connected to the base.

[0010] Preferably, a pressure sensor and a pressure gauge are installed on the base, the pressure sensor and the pressure gauge are electrically connected, and the position of the pressure sensor corresponds to the adhesive application position.

[0011] Preferably, the base is made of stainless steel.

[0012] Preferably, the blade position of the blade-containing mold corresponds to the position of the slot groove.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model achieves rapid and accurate cutting of samples by having a blade with a blade mold correspond to the slot on the ungraded steel plate. The operation is simple, and the blade can cut along the path of the slot, avoiding cutting errors caused by manual operation or inaccurate positioning.

[0015] 2. This utility model combines a pressure sensor and a pressure gauge to monitor the pressure value in real time during the pressing process. When the pressure gauge displays a preset value (such as 500 ps i), the pressing can be stopped immediately, thereby ensuring a tight fit between the sample and the unscaled steel plate and ensuring consistent pressure during each cut. This helps reduce differences in sample cutting quality caused by uneven pressure and improves the accuracy and reliability of subsequent tests.

[0016] 3. This utility model provides an adhesive application position between the two slots, which facilitates the application of double-sided tape, making the operation easier and ensuring that the sample and the unmarked steel plate are tightly bonded together by the double-sided tape. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure label annotations: 1. Base; 2. Ungraded steel plate; 3. Steel plate fixing clamp; 4. Slot; 5. Support frame; 6. Tension spring; 7. Mold with blade; 8. Downward support frame; 9. Pressure gauge; 10. Pressure sensor. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0020] In one embodiment, such as Figure 1As shown, a pretreatment device for electrode adhesion testing includes a base 1. A non-gradient steel plate 2 is placed in the middle of the upper end of the base 1. Two slots 4 are formed on the non-gradient steel plate 2, and the area between the two slots 4 is the adhesive application position. A fixing component for fixing the non-gradient steel plate 2 is installed on the upper end of the base 1. A support frame 5 is fixed to the rear side of the upper end of the base 1. A lower support frame 8 is fixedly connected to the upper end of the support frame 5 by a tension spring 6. A blade-containing mold 7 is fixed on the lower support frame 8, and the blade-containing mold 7 is located above the non-gradient steel plate 2.

[0021] In this embodiment, double-sided tape is first applied to the adhesive application position, then the unmarked steel plate 2 is placed on the base 1, and then the unmarked steel plate 2 is fixed by the fastener. Next, the sample to be tested is applied to the double-sided tape, and the die 7 with the blade is pressed down. After the pressing is completed, the unmarked steel plate 2 is removed and installed on the tensile testing machine for testing.

[0022] In an optional embodiment, the fastener includes four steel plate fixing clips 3, which are located at the four corners of the unmarked steel plate 2, and are connected to the base 1.

[0023] It should be noted that by using four steel plate clamps 3 as fasteners, the unmarked steel plate 2 can be effectively fixed, ensuring the stability of the processing.

[0024] In an optional embodiment, a pressure sensor 10 and a pressure gauge 9 are mounted on the base 1, the pressure sensor 10 and the pressure gauge 9 are electrically connected, and the position of the pressure sensor 10 corresponds to the adhesive application position.

[0025] It should be noted that the position of the pressure sensor 10 corresponds to the adhesive application position, which means that when the blade mold 7 is pressed down, it indirectly contacts the pressure sensor 10, thereby enabling accurate measurement of the pressure value during the pressing process.

[0026] In an optional embodiment, the base 1 is made of stainless steel.

[0027] It should be noted that stainless steel has high strength and hardness, enabling it to withstand the pressure during processing. This ensures the stability and reliability of the base 1 in fixing the unmarked steel plate 2 and supporting the entire device.

[0028] In an optional embodiment, the blade position of the blade-containing mold 7 corresponds to the position of the slot 4.

[0029] It should be noted that the blade position of the blade mold 7 corresponds to the position of the slot 4. This means that the blade will cut along the path of the slot 4 during the pressing process, thereby ensuring that the cut samples are accurate and consistent in size.

[0030] The above embodiment discloses a pretreatment device for electrode adhesion testing. First, double-sided adhesive tape is applied to the adhesive application area. Then, a non-gradient steel plate 2 is placed on a base 1. Next, a steel plate fixing clamp 3 is used to fix the non-gradient steel plate 2. Then, the sample to be tested is attached to the double-sided adhesive tape. The blade-containing mold 7 is pressed down, and the pressure sensor 10 displays the applied pressure via a pressure gauge 9. Pressing down on the blade-containing mold 7 stops when the pressure gauge displays 500 ps / min. Since the blade position of the blade-containing mold 7 corresponds to the position of the slot 4, when the blade-containing mold 7 is pressed down, the blade engages with the slot 4 to cut the sample to be tested into the specified size. Afterward, the non-gradient steel plate 2 is removed and installed on a tensile testing machine for testing.

[0031] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A pretreatment device for testing electrode adhesion strength, characterized in that, The system includes a base (1), on which a steel plate (2) without a scale is placed in the middle of the upper end. The steel plate (2) without a scale has two slots (4) with adhesive between them. The upper end of the base (1) is equipped with a fastener for fixing the steel plate (2) without a scale. A support frame (5) is fixed to the rear side of the upper end of the base (1). The upper end of the support frame (5) is fixedly connected to a pressure support frame (8) by a tension spring (6). A mold containing a blade (7) is fixed on the pressure support frame (8). The mold containing a blade (7) is located above the steel plate (2) without a scale.

2. The pretreatment device for electrode adhesion testing according to claim 1, characterized in that, The fastener includes four steel plate clamps (3), which are located at the four corners of the unmarked steel plate (2) and are connected to the base (1).

3. The pretreatment device for electrode adhesion testing according to claim 1, characterized in that, A pressure sensor (10) and a pressure gauge (9) are installed on the base (1). The pressure sensor (10) and the pressure gauge (9) are electrically connected. The position of the pressure sensor (10) corresponds to the adhesive application position.

4. The pretreatment device for electrode adhesion testing according to claim 1, characterized in that, The base (1) is made of stainless steel.

5. The pretreatment device for electrode adhesion testing according to claim 1, characterized in that, The blade position of the blade-containing mold (7) corresponds to the position of the slot (4).

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