Auxiliary tool and method for measuring width of thinned area of lithium battery pole piece

Abstract

The invention discloses an auxiliary tool for measuring the width of a thinned area of a lithium battery pole piece and a measuring method. The auxiliary tool comprises a workbench; a sliding groove is formed in the upper surface of the workbench in the length direction, pole piece limiting mechanisms are arranged at the two ends of the sliding groove in a sliding mode and used for containing a pole piece to be measured, a laser range finder is further arranged on the upper surface of the workbench, and the laser range finder is aligned with a thinned area of the pole piece to be measured and used for measuring the width of the thinned area of the pole piece to be measured. According to the invention, non-contact measurement is realized, and pole piece damage possibly caused by contact measurement is avoided; meanwhile, errors caused by manual recording are avoided, the risk of human errors in data recording is reduced, the accuracy and efficiency of measurement are improved, and the labor intensity of operators is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of lithium ion battery manufacturing, and in particular to an auxiliary tool and a measuring method for measuring the width of a lithium battery pole piece thinning area. Background Art

[0002] With the promotion of new energy, the lithium-ion battery industry has also entered an era of rapid development, and the attention to the safety performance of lithium-ion batteries has also increased. In the manufacturing process of lithium-ion batteries, one of the key components is the lithium battery pole piece. The lithium-ion battery pole piece is a thin sheet structure composed of a coating composed of active material positive electrode material or negative electrode material, conductive agent, binder, etc., which is evenly coated on the metal current collector. Lithium battery pole pieces are divided into two types, positive pole pieces and negative pole pieces. In order to meet specific design requirements, the lithium battery will be thinned during the manufacturing process of lithium battery pole pieces. The thinned area is to achieve specific functions or improve the overall performance of the battery. In order to ensure that the actual production products are consistent with the design drawings and to ensure that the battery performance meets expectations, the thinned area of ​​the lithium battery needs to be measured, and measurement auxiliary tooling is usually used during the measurement process.

[0003] In the prior art, the width of the thinned area of ​​a lithium battery pole piece is mainly measured by contact measurement using a micrometer. This contact measurement method may cause deformation or damage to the lithium battery pole piece. In addition, the measurement results in the above-mentioned prior art need to be recorded manually, which not only increases the labor intensity of the operator, but also easily introduces human errors, reducing the accuracy and efficiency of data recording. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides an auxiliary tooling and a measuring method for measuring the width of the thinned area of ​​a lithium battery pole piece. The auxiliary tooling is used to solve the problems that the existing auxiliary tooling for measuring the width of the thinned area of ​​a lithium battery pole piece uses a micrometer for contact measurement, resulting in deformation or damage of the pole piece, and manual recording of results increases labor intensity and reduces data accuracy.

[0005] In order to achieve the above object, the present invention adopts the following technical solution:

[0006] In a first aspect, the present invention provides an auxiliary tool for measuring the width of a thinned area of ​​a lithium battery pole piece, comprising: a workbench; a slide groove is provided on the upper surface of the workbench along the length direction, and pole piece limiting mechanisms are slidably provided at both ends of the slide groove for placing the pole piece to be measured, and a laser rangefinder is also provided on the upper surface of the workbench, and the laser rangefinder is aimed at the thinned area of ​​the pole piece to be measured, for measuring the width of the thinned area of ​​the pole piece to be measured.

[0007] As a further technical solution, a driving member is further installed on the upper surface of the workbench, the length of the driving member is equal to the length of the workbench, and the width of the driving member is smaller than the width of the workbench.

[0008] As a further technical solution, a first connecting member is fixedly mounted on the upper surface of the driving member, an adjustable tripod is mounted on the first connecting member, a rotating member is mounted on the upper end of the adjustable tripod, and the laser rangefinder is connected to the rotating member.

[0009] As a further technical solution, a first bidirectional screw rod is rotatably connected in the slide groove, and the two ends of the first bidirectional screw rod are respectively rotatably connected to the inner walls at both ends of the slide groove; a first sliding member is slidably arranged on both ends of the first bidirectional screw rod, and the pole piece limiting mechanism is fixedly installed on the first sliding member.

[0010] As a further technical solution, the pole piece limiting mechanism includes a support member, the lower surface of which is fixedly connected to the first sliding member; two mounting members are symmetrically installed on both sides of the upper surface of the support member, and a second bidirectional screw rod is rotatably connected to the two mounting members, and the second bidirectional screw rod passes through the two mounting members.

[0011] As a further technical solution, the pole piece limiting mechanism also includes two second connecting members, which are respectively rotatably mounted on the two ends of the second bidirectional screw, and the two second connecting members are respectively on the outside of the two mounting members; wedge-shaped limiting blocks are respectively installed on the two second connecting members, and the wedge-shaped limiting blocks slide through the mounting members.

[0012] As a further technical solution, both of the two mounting members are provided with openings matching the wedge-shaped limiting blocks, and the narrow ends of the wedge-shaped limiting blocks pass through the openings.

[0013] As a further technical solution, the upper surface of the workbench is provided with scale lines along the length direction, and the scale lines are close to the slide groove and are arranged parallel to the slide groove.

[0014] As a further technical solution, a light shield is provided above the workbench, and the light shield is fixedly connected to the four sides of the workbench. A protective door is provided on the front side of the light shield, and an observation window is provided on the protective door. A controller is also provided on the protective door, and the controller includes a display screen and control buttons. The controller is electrically connected to the driving member, the adjustable tripod, the laser rangefinder and the rotating member.

[0015] In a second aspect, the present invention provides a method for measuring the width of a lithium battery pole piece thinning area, based on an auxiliary tool for measuring the width of a lithium battery pole piece thinning area described in any one of the first aspects, comprising: rotating a first bidirectional screw to adjust the positions of two sliding members, rotating a second bidirectional screw to adjust the positions of two wedge-shaped limit blocks, placing the pole piece to be measured on a support member, and fixing it by a pole piece limiting mechanism to ensure that the pole piece thinning area is located within the measurement area, using an adjustable tripod to adjust the height of a laser rangefinder to ensure that the laser rangefinder can accurately align with the pole piece thinning area, fine-tuning the angle of the laser rangefinder by a rotating member, using a driving member to move the laser rangefinder along a scale line on a workbench to achieve automatic measurement, starting a measurement program by a controller, and displaying the measurement results on a display screen.

[0016] One or more technical solutions of the present invention have the following beneficial effects:

[0017] (1) The present invention can stably fix the lithium-ion battery pole piece by arranging two pole piece limiting mechanisms and a laser rangefinder on the workbench, realize non-contact measurement, and avoid the pole piece damage that may be caused by contact measurement. At the same time, the workbench is covered with a light shield, and a controller is designed on the light shield, which can automatically record the measurement results, avoid the errors caused by manual recording, reduce the risk of human errors in data recording, and at the same time improve the accuracy and efficiency of measurement and reduce the labor intensity of the operator.

[0018] (2) The present invention provides a light shield on the workbench, a protective door is designed on the light shield, and an observation window with an anti-reflection coating on the surface is opened on the light shield. The light shield can effectively block external light and reduce the influence of background light on the measurement process. The protective door provides a safe operating environment for the operator and reduces the occurrence of accidents. The anti-reflection coating on the observation window reduces light reflection and improves observation clarity, which helps the operator to monitor the measurement process more accurately. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0020] Figure 1 It is a structural schematic diagram of the measurement auxiliary tooling of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the measurement auxiliary tooling workbench of the present invention;

[0022] Figure 3 This is an internal view of the auxiliary tooling light shield of the present invention after being covered on the workbench;

[0023] Figure 4This is a schematic diagram of a slideway on a workbench of a measuring auxiliary tooling of the present invention;

[0024] Figure 5 This is a schematic diagram of the structure of an adjustable tripod for the measurement auxiliary tooling of the present invention;

[0025] Figure 6 This is a schematic diagram of the structure of the rotating part of the measuring auxiliary tooling of the present invention;

[0026] Figure 7 This is a schematic diagram of the structure of the pole piece limiting mechanism of the measurement auxiliary tooling of the present invention;

[0027] Among them: 1. light shield; 2. protective door; 3. controller; 4. observation window; 5. workbench; 6. pole piece limiting mechanism; 601. support member; 602. mounting member; 603. wedge-shaped limiting block; 604. second bidirectional lead screw; 605. second connecting member; 7. driving member; 8. rotating member; 9. first bidirectional lead screw; 10. scale line; 11. sliding member; 12. first connecting member; 13. adjustable tripod; 14. laser rangefinder. DETAILED DESCRIPTION

[0028] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0029] Embodiment 1

[0030] This embodiment provides a lithium battery pole piece thinning area width measurement auxiliary tooling, such as Figure 2 As shown, the measuring auxiliary tooling includes: a workbench 5, the upper surface of the workbench 5 is provided with a slide groove along the length direction, and both ends of the slide groove are slidably provided with a pole piece limiting mechanism 6 for placing the pole piece to be measured, specifically: Figure 4 As shown in the schematic diagram of the slideway on the workbench, the slideway is opened along the length direction of the workbench, and near one side of the upper surface of the workbench, a first bidirectional screw 9 is rotatably connected in the slideway, and the two ends of the first bidirectional screw 9 are respectively rotatably connected to the inner walls at both ends of the slideway, and sliding members 11 are slidably provided on both ends of the first bidirectional screw 9, and the pole piece limiting mechanism 6 is fixedly installed on the sliding members 11. The positions of the sliding members 11 on the two ends of the first bidirectional screw 9 can be accurately controlled by the rotation of the first bidirectional screw 9, thereby controlling the position of the pole piece limiting mechanism 6, and then realizing the precise adjustment of the pole piece limiting mechanism 6, ensuring that the pole piece to be measured is symmetrically and stably fixed during the measurement process, avoiding the displacement or deformation of the pole piece to be measured during the measurement process, and adjusting according to the actual size of the pole piece to be measured, so as to adapt to pole pieces to be measured of different sizes, and improving the versatility and flexibility of the measurement auxiliary tooling.

[0031] like Figure 7 As shown in the structural schematic diagram of the pole piece limiting mechanism of the measurement auxiliary tooling, the pole piece limiting mechanism includes a support member 601, the lower surface of the support member 601 is fixedly connected to the sliding member 11, and two mounting members 602 are symmetrically installed on both sides of the upper surface of the support member 601, and the two mounting members 602 are rotatably connected to the second bidirectional screw rod 604, and the second bidirectional screw rod 604 passes through the two mounting members 602, and the pole piece limiting mechanism 6 also includes two second connecting members 605, and the two second connecting members 605 are respectively rotatably installed at the two ends of the second bidirectional screw rod, and the two second The connecting members 605 are respectively on the outside of the two mounting members 602, and a wedge-shaped limit block 603 is respectively installed on the two second connecting members 605. The wedge-shaped limit block 603 is made of wear-resistant material. The wedge-shaped limit block 603 made of wear-resistant material improves the durability of the pole piece limiting mechanism and reduces the frequency of maintenance and replacement. In this embodiment, the wedge-shaped limit block 603 slides through the mounting members 602. Specifically: openings matching the wedge-shaped limit block 603 are opened on the two mounting members 602, and the narrow end of the wedge-shaped limit block 603 passes through the opening. The rotation of the second bidirectional screw 604 can accurately control the positions of the two wedge-shaped limit blocks 603, thereby realizing the precise limitation of the pole piece thinning area. Through the cooperation of the symmetrically installed mounting parts 602 and the supporting parts 601, the stability of the pole piece limiting mechanism 6 during the measurement process can be ensured, and the displacement or deformation of the pole piece to be measured during the measurement process can be avoided. At the same time, it can also adapt to pole piece thinning areas of different sizes, thereby improving the versatility and flexibility of the tooling, ensuring the stability and accuracy of the pole piece during the measurement process, and also improving the adaptability of the tooling.

[0032] In this embodiment, a laser rangefinder 14 is also provided on the upper surface of the workbench 5, and the laser rangefinder 14 is aimed at the pole piece thinning area to be measured, and is used to measure the width of the pole piece thinning area to be measured. Specifically: the laser rangefinder 14 is used for non-contact measurement of the width of the pole piece thinning area, avoiding the pole piece damage that may be caused by contact measurement, providing high-precision measurement results, reducing the influence of human factors on the measurement results, and improving the accuracy and efficiency of data recording. A driving member 7 is also installed on the upper surface of the workbench. The length of the driving member 7 is equal to the length of the workbench, and the width of the driving member 7 is less than the width of the workbench. A first connecting member 12 is installed on the upper surface of the driving member 7, such as Figure 5As shown, an adjustable tripod 13 is installed on the first connecting member 12, and specifically: the driving member 7 is selected as a linear motor (the linear motor is electrically connected to the controller 3, and the adjustable tripod 13 is driven to move by the controller 3) or a stepper motor, a rotating threaded rod and a slider (the stepper motor is installed on the workbench 5, the stepper motor is connected to the rotating threaded rod, the slider is slidably installed on the rotating threaded rod, the slider is connected to the adjustable tripod 13, the stepper motor is electrically connected to the controller 3, the stepper motor is driven to rotate by the controller 3, the stepper motor drives the rotating threaded rod to rotate, the rotating threaded rod drives the slider to move, and the slider drives the adjustable tripod 13 to move), as shown in FIG. Figure 6 As shown, a rotating member 8 is installed at the upper end of the adjustable tripod 13, and a laser rangefinder 14 is connected to the rotating member 8. The adjustable tripod 13 can adjust the height and position of the laser rangefinder 14 to ensure that the laser rangefinder 14 can accurately align with the pole piece thinning area, thereby improving the flexibility and adaptability of the measurement and meeting the measurement requirements of thinning areas of different sizes and positions. By adjusting the rotating member 8, it can be ensured that the laser rangefinder 14 is accurately aligned with the pole piece thinning area, thereby improving the accuracy of the measurement.

[0033] like Figure 3 As shown, the upper surface of the workbench 5 is provided with scale lines 10 along the length direction, and the scale lines 10 are close to the slide slot and are arranged parallel to the slide slot. The scale lines 10 provide a clear position reference for the laser rangefinder 14, ensuring the accuracy of the measured position.

[0034] In this embodiment, if Figure 1As shown, a light shield 1 is covered on the top of the workbench 5, and the light shield 1 is fixedly connected to the four sides of the workbench 5. The light shield 1 can effectively isolate external light and reduce the influence of background light on the measurement process. A protective door 2 is arranged on the front side of the light shield 1. The protective door 2 provides a safe operating environment for the operator and reduces the occurrence of accidents. An observation window 4 is provided on the protective door 2. The surface of the observation window 4 is coated with an anti-reflection coating. The anti-reflection coating on the observation window 4 reduces light reflection, improves the observation clarity, and helps the operator to monitor the measurement process more accurately. A controller 3 is also arranged on the protective door 2. The controller 3 includes a display screen and a control button, wherein the controller is electrically connected to the driving part, the adjustable tripod, the laser rangefinder and the rotating part. The controller 3 allows the operator to easily control the operation of the entire measurement system through the control button, and can realize automatic measurement, reducing the need for manual intervention. The display screen can display the measurement results and other relevant information, which is convenient for the operator to view and record data. Through automatic control, the measurement efficiency can be improved and the labor intensity of the operator can be reduced. The controller 3 is installed on the protective door 2. The controller 3 includes a display screen and control buttons. The controller 3 is electrically connected to the driving member 7, the adjustable tripod 13, the laser rangefinder 14 and the rotating member 8, that is, the driving member 7 can be driven to make reciprocating motion by the controller 3, thereby driving the adjustable tripod 13 to move, and measuring different positions of the stage film. The controller 3 drives the adjustable tripod 13 to operate, so that the adjustable tripod 13 can be automatically adjusted to a height suitable for measurement. The controller 3 drives the laser rangefinder 14, and can start or shut down the laser rangefinder 14. When the laser rangefinder 14 is needed, the laser rangefinder 14 is turned on by the controller 3. After use, the laser rangefinder 14 is turned off by the controller 3. The controller 3 drives the rotating member 8 to rotate through the electrical connection, and the angle of the laser rangefinder 14 is adjusted by the rotating member 8, so as to measure the stage film at different positions.

[0035] Embodiment 2

[0036] The present embodiment mentions a measurement method based on a lithium battery pole piece thinning area width measurement auxiliary tooling, and the specific method is: rotate the first bidirectional screw to adjust the position of the two sliding members 11 to ensure that the pole piece to be measured can be stably clamped on the workbench 5, rotate the second bidirectional screw 604 to adjust the position of the two wedge-shaped limit blocks 603 to adapt to pole pieces of different sizes to be measured, place the pole piece to be measured on the support member 601, and fix it in an appropriate position through the pole piece limit mechanism 6 to ensure that the pole piece thinning area is located in the measurement area, use the adjustable tripod 13 to adjust the height of the laser rangefinder 14 to ensure that the laser rangefinder 14 can be accurately aligned with the pole piece thinning area, and further fine-tune the angle of the laser rangefinder 14 through the rotating member 8 to ensure the best measurement position, use the driving member 7 to move the laser rangefinder 14 along the scale line 10 on the workbench 5 to achieve automatic measurement, start the measurement program through the controller 3, and display the measurement results on the display screen. The control button can be used to control the measurement process, and the measurement data can be viewed through the display screen on the controller 3 and recorded for subsequent analysis. It should be noted that the control process of the above controller is achievable with the prior art, and this embodiment does not improve the control process.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A lithium battery pole piece thinning area width measurement auxiliary tool, characterized in that: include: Workbench; A slide groove is provided on the upper surface of the workbench along the length direction, and pole piece limiting mechanisms are slidably provided at both ends of the slide groove for placing the pole piece to be tested. A laser rangefinder is also provided on the upper surface of the workbench, and the laser rangefinder is aimed at the thinning area of ​​the pole piece to be tested, so as to measure the width of the thinning area of ​​the pole piece to be tested.

2. A lithium battery pole piece thinning area width measurement auxiliary tool as claimed in claim 1, characterized in that: A driving member is also installed on the upper surface of the workbench. The length of the driving member is equal to the length of the workbench, and the width of the driving member is smaller than the width of the workbench.

3. A lithium battery pole piece thinning area width measurement auxiliary tool as claimed in claim 2, characterized in that: A first connecting member is fixedly mounted on the upper surface of the driving member, an adjustable tripod is mounted on the first connecting member, a rotating member is mounted on the upper end of the adjustable tripod, and the laser rangefinder is connected to the rotating member.

4. The auxiliary tool for measuring the width of the thinned area of ​​a lithium battery pole piece according to claim 1, characterized in that: A first bidirectional screw rod is rotatably connected in the slide groove, and both ends of the first bidirectional screw rod are rotatably connected to the inner walls at both ends of the slide groove respectively; first sliding parts are slidably arranged on both ends of the first bidirectional screw rod, and the pole piece limiting mechanism is fixedly installed on the first sliding part.

5. A lithium battery pole piece thinning area width measurement auxiliary tool as claimed in claim 4, characterized in that: The pole piece limiting mechanism includes a support member, the lower surface of which is fixedly connected to the first sliding member; two mounting members are symmetrically installed on both sides of the upper surface of the support member, and a second bidirectional screw rod is rotatably connected to the two mounting members, and the second bidirectional screw rod passes through the two mounting members.

6. A lithium battery pole piece thinning area width measurement auxiliary tool as claimed in claim 5, characterized in that: The pole piece limiting mechanism also includes two second connecting members, which are respectively rotatably mounted on the two ends of the second bidirectional screw, and the two second connecting members are respectively on the outsides of the two mounting members; wedge-shaped limiting blocks are respectively mounted on the two second connecting members, and the wedge-shaped limiting blocks slide through the mounting members.

7. A lithium battery pole piece thinning area width measurement auxiliary tool as claimed in claim 6, characterized in that: Both of the two mounting parts are provided with openings matching with the wedge-shaped limiting blocks, and the narrow ends of the wedge-shaped limiting blocks pass through the openings.

8. The auxiliary tool for measuring the width of the thinned area of ​​a lithium battery pole piece according to claim 1, characterized in that: The upper surface of the workbench is provided with scale lines along the length direction, and the scale lines are close to the slide groove and are arranged parallel to the slide groove.

9. The auxiliary tool for measuring the width of the thinned area of ​​a lithium battery pole piece according to claim 1, characterized in that: A light shield is provided above the workbench, and the light shield is fixedly connected to the four sides of the workbench. A protective door is provided on the front side of the light shield, and an observation window is provided on the protective door. A controller is also provided on the protective door, and the controller includes a display screen and control buttons. The controller is electrically connected to the driving member, the adjustable tripod, the laser rangefinder and the rotating member.

10. A method for measuring the width of a thinned area of ​​a lithium battery pole piece, based on an auxiliary tool for measuring the width of a thinned area of ​​a lithium battery pole piece according to any one of claims 1 to 9, characterized in that: include: Turn the first bidirectional lead screw to adjust the positions of the two sliding parts, turn the second bidirectional lead screw to adjust the positions of the two wedge-shaped limit blocks, place the pole piece to be measured on the support, and fix it by the pole piece limit mechanism to ensure that the pole piece thinning area is located in the measuring area, use the adjustable tripod to adjust the height of the laser rangefinder to ensure that the laser rangefinder can accurately align with the pole piece thinning area, fine-tune the angle of the laser rangefinder by the rotating part, use the driving part to move the laser rangefinder along the scale line on the workbench to realize automatic measurement, start the measurement program through the controller, and display the measurement results on the display screen.

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