Lithium battery diaphragm thermal shrinkage tool manufacturing tool

Abstract

The utility model relates to the technical field of material detection, in particular to a lithium battery diaphragm thermal shrinkage tool. The diaphragm thermal shrinkage tool comprises a measuring base plate and a holding piece, four point taking hole positions are arranged on the measuring base plate, the centers of the four point taking hole positions are located at the four corners of a square respectively, in the thermal shrinkage inspection process, before thermal shrinkage of a diaphragm, the holding piece is held by a hand, and the measuring base plate and the holding piece are arranged on the measuring base plate. The measuring substrate is placed on the cut diaphragm to be detected, a pen point is inserted into the point taking hole site, the marking point is taken, the diaphragm transverse measuring marking line and the diaphragm longitudinal measuring marking line before thermal shrinkage are obtained through a connecting line, the diaphragm transverse measuring marking line and the diaphragm longitudinal measuring marking line after shrinkage are directly measured after thermal shrinkage, and then the thermal shrinkage amount can be obtained. The tool simplifies the inspection steps, is convenient for personnel operation, shortens the working hours, and improves the efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of material detection, in particular to a thermal shrinkage tooling fixture for a lithium battery separator. Background Art

[0002] At present, lithium-ion batteries in the prior art have the advantages of high energy density, good safety, long cycle life, etc., and are widely used in multiple industries and fields in daily life. With the continuous expansion of the application fields of lithium batteries, people's requirements for the performance of lithium-ion batteries are also getting higher and higher. The separator is an important component of a lithium battery, which should have good chemical stability and safety, and also have relatively high mechanical strength. The thermal shrinkage of the battery separator, that is, heat shrinkage, is an important performance index.

[0003] At present, the inspection method of heat shrinkage in the industry usually cuts a separator of a certain size and uses a ruler to draw lines on the separator to mark the horizontal and vertical directions. The shrinkage amount is calculated by the formula: (before shrinkage - after shrinkage) / before shrinkage * 100%. However, on the one hand, the inspection personnel cannot accurately and quickly select the heat shrinkage points, and the detection efficiency is low; on the other hand, the edge of the separator is prone to curling after heat shrinkage, and the shrinkage amount cannot be accurately measured, especially for the "heat shrinkage" edge of the coated film, which curls, resulting in inaccurate measurement and errors.

[0004] Therefore, the inventor provides a thermal shrinkage tooling fixture for a lithium battery separator. Summary of the Utility Model

[0005] (1) Technical Problems to be Solved

[0006] The technical problem to be solved by the utility model is to provide a thermal shrinkage tooling fixture for a lithium battery separator to solve the problems of inconvenient detection of separator thermal shrinkage and inaccurate measurement of the shrinkage amount due to the easy curling of the separator edge after thermal shrinkage in the prior art.

[0007] (2) Technical Solutions

[0008] To solve the above technical problems, the utility model provides a thermal shrinkage tooling fixture for a lithium battery separator, which includes a measurement substrate and a holding member fixedly connected to the measurement substrate. Four point-taking holes are provided on the measurement substrate, and the centers of the four point-taking holes are respectively located at the four corners of a square. When the quality inspection personnel operate, the point-taking holes are used to accommodate the point-taking pen tips. The connection line of a pair of opposite corners in the four corners of the square is the transverse measurement marking line of the separator, and the connection line of the other pair of opposite corners is the longitudinal measurement marking line of the separator.

[0009] Among them, the size of the measurement substrate is 14.5 cm * 14.5 cm.

[0010] Among them, the material of the measurement substrate is stainless steel.

[0011] Among them, the initial thickness of the measurement substrate is set to 1-2 mm.

[0012] Among them, the edge of the measurement substrate is arc-shaped.

[0013] Among them, the holding member includes a long cylinder and a spherical ball. The top of the long cylinder is connected to the spherical ball, and the bottom of the long cylinder is connected to the center of the measurement substrate.

[0014] Among them, the diameter of the spherical ball is 4 cm.

[0015] Among them, both the transverse measurement marking line and the longitudinal measurement marking line of the diaphragm are 10 cm.

[0016] (III) Beneficial effects

[0017] The above technical solutions of the present utility model have the following advantages:

[0018] In the present utility model, the designed diaphragm heat shrinkage tooling fixture includes a measurement substrate and a holding member. Four point-taking hole positions are provided on the measurement substrate, and the centers of the four point-taking hole positions are respectively located at the four corners of a square. During the heat shrinkage inspection process, before the diaphragm heat shrinkage, hold the holding member and place the measurement substrate on the intercepted diaphragm to be detected. The quality inspection personnel insert the pen tip into the point-taking hole positions to take marking points, and obtain the transverse measurement marking line and the longitudinal measurement marking line of the diaphragm before heat shrinkage through connection. After heat shrinkage, directly measure the transverse measurement marking line and the longitudinal measurement marking line of the diaphragm after shrinkage, and then the heat shrinkage amount can be obtained. Description of the drawings

[0019] Figure 1 It is a top view structural schematic diagram of the lithium battery diaphragm heat shrinkage tooling fixture of the present utility model;

[0020] Figure 2 It is Figure 1 A partial enlarged structural schematic diagram of point M at the point-taking hole position in

[0021] Figure 3 It is a side view structural schematic diagram of the lithium battery diaphragm heat shrinkage tooling fixture of the present utility model.

[0022] In the figure: 1. Measurement substrate; 2. Holding member; 3. Diaphragm; 4. Point-taking pen tip; 101. Point-taking hole position; a. Transverse measurement marking line of the diaphragm; b. Width of the measurement substrate. Specific embodiments

[0023] The following combines the drawings and embodiments to further describe in detail the specific embodiments of the present utility model. The following embodiments are used to illustrate the present utility model, but do not limit the scope of the present utility model.

[0024] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0025] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0026] As Figure 1 , Figure 2 , Figure 3 As shown, the thermal shrinkage tooling fixture for lithium battery separators of the present utility model includes a measurement substrate 1 and a holding member 2 fixedly connected to the measurement substrate. Four point-taking hole positions 101 are provided on the measurement substrate 1, and the centers of the four point-taking hole positions are respectively located at the four corners of a square. When the quality inspection personnel operate, the point-taking hole positions are used to accommodate the point-taking pen tip 4. The connection line of a pair of opposite corners in the four corners of the square is the transverse measurement marking line a of the separator, and the connection line of the other pair of opposite corners is the longitudinal measurement marking line of the separator. Among them, the size of the hole positions needs to be designed in combination with the pen tip used by the quality inspection personnel, and the aperture is controlled to just pass through a pen tip, which is convenient for the quality inspection personnel to take points during operation.

[0027] In the above technical solution, the designed thermal shrinkage tooling fixture for separators includes a measurement substrate 1 and a holding member 2. Four point-taking hole positions 101 are provided on the measurement substrate. The centers of the four point-taking hole positions are respectively located at the four corners of a square. During the thermal shrinkage inspection process, before the thermal shrinkage of the separator, hold the holding member by hand and place the measurement substrate on the intercepted separator 3 to be detected. The quality inspection personnel insert the pen tip 4 into the point-taking hole positions to take marked points, and obtain the transverse measurement marking line and the longitudinal measurement marking line of the separator before thermal shrinkage through connection. After thermal shrinkage, directly measure the transverse measurement marking line and the longitudinal measurement marking line of the shrunk separator, and then the thermal shrinkage amount can be obtained.

[0028] Preferably, the size of the measurement substrate is 14.5 cm * 14.5 cm, that is, the width b is 14.5 cm. The existing specifications of the shrinkage sampling block are 15 cm * 15 cm. Therefore, the initial designed specifications of this shrinkage tooling are 14.5 cm * 14.5 cm.

[0029] Preferably, the material of the measurement substrate is stainless steel. Of course, other materials can also be used.

[0030] Preferably, the thickness of the measurement substrate is initially set at 1-2 mm.

[0031] Preferably, the edge of the measurement substrate is arc-shaped to avoid scratching the hands of personnel.

[0032] Preferably, the holding member 2 includes a long cylinder 201 and a spherical ball 202. The top of the long cylinder is connected to the spherical ball, and the bottom of the long cylinder is connected to the center of the measurement substrate. That is, a 5-cm long cylinder is designed in the middle of the stainless steel plate, and the top is a spherical grip with a diameter of 4 cm for convenient picking up.

[0033] Preferably, the center distance between the upper, lower, left, and right hole positions of the measurement substrate is 10 cm, that is, both the transverse measurement marking line a and the longitudinal measurement marking line of the diaphragm are 10 cm.

[0034] In the solution provided by the present utility model, the inspection personnel can accurately and quickly pick the heat shrinkage points. The whole process reduces costs and increases efficiency, simplifies the inspection steps, is convenient for personnel operation, shortens the working hours, improves the efficiency, and reduces the error caused by the inability to accurately measure due to the edge curling (especially the coating film) during the physical property inspection of "heat shrinkage".

[0035] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present utility model, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. A heat shrink tool for lithium battery diaphragm, characterized in that: It includes a measuring substrate and a holding piece fixedly connected to the measuring substrate. Four point-taking holes are arranged on the measuring substrate. The centers of the four point-taking holes are respectively located at the four corners of a square. When the quality inspector is working, the point-taking holes are used to accommodate the point-taking pen tips. The line connecting one pair of the four corners of the square is the horizontal measuring mark line of the diaphragm, and the line connecting the other pair of corners is the longitudinal measuring mark line of the diaphragm.

2. The lithium battery diaphragm heat shrinking tooling according to claim 1, characterized in that: The measurement substrate has a size of 14.5 cm*14.5 cm.

3. The heat shrinking tool for lithium battery diaphragm according to claim 1, characterized in that: The measuring substrate is made of stainless steel.

4. The lithium battery diaphragm heat shrinking tooling according to claim 1, characterized in that: The thickness of the measurement substrate is initially determined to be 1-2 mm.

5. The lithium battery diaphragm heat shrinking tooling as claimed in claim 1, characterized in that: The edge of the measuring substrate is in an arc shape.

6. The heat shrinking tool for lithium battery diaphragm according to claim 1, characterized in that: The holding piece comprises a long cylinder and a sphere, the top of the long cylinder is connected to the sphere, and the bottom of the long cylinder is connected to the center of the measuring substrate.

7. The heat shrinking tool for lithium battery separator according to claim 6, characterized in that: The diameter of the sphere is 4 cm.

8. The heat shrinking tool for lithium battery separator according to claim 1, characterized in that: The transverse measuring mark line and the longitudinal measuring mark line of the diaphragm are both 10 cm.

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