Battery thickness measuring device

Abstract

The utility model belongs to the technical field of battery production, and particularly relates to a battery thickness measuring device which comprises a movable pressing plate, a fixed pressing plate and a motion driving mechanism. The fixed pressing plate is connected to the motion driving mechanism; a measuring cavity is formed in the fixed pressing plate; the movable pressing plate is movably arranged in the measuring cavity; the movable pressing plate is used for abutting against a product with the thickness to be measured. According to the utility model, the calibration difficulty can be reduced, the measurement accuracy can be improved, and the measurement efficiency can be guaranteed; and the problem of measurement error increase caused by looseness or deformation of the upper and lower pressing plates in the continuous use process can be avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery production, and in particular relates to a battery thickness measuring device. Background Art

[0002] In the actual production process, after the battery cell undergoes OCV testing, its thickness also needs to be tested. In the industry, one approach is to clamp the battery cell to be measured using two high-precision clamping plates, one upper and one lower. High-precision linear guides are used as guides to apply a certain amount of pressure to the surface of the cell. A dial indicator is then used to measure the distance between the two clamping plates to achieve the purpose of measuring the cell thickness.

[0003] However, this method requires simultaneously driving the movement of the upper and lower clamps to clamp the battery cell of the measured thickness. When the number of uses increases, the upper and lower clamps may become loose or deformed, causing the measurement error to increase, thus affecting the measurement accuracy; and its operation direction is relatively complicated. Utility Model Content

[0004] The purpose of the present invention is to provide a battery thickness measuring device to solve the technical problem of poor measurement accuracy in view of the shortcomings of the existing technology.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A battery thickness measuring device includes a movable pressure plate, a fixed pressure plate and a motion drive mechanism; the fixed pressure plate is connected to the motion drive mechanism; a measuring cavity is provided in the fixed pressure plate; the movable pressure plate is movably arranged inside the measuring cavity; and the movable pressure plate is used to abut against the product to be measured.

[0007] Preferably, the measuring cavity is arranged to pass through the thickness direction of the fixed pressure plate.

[0008] Preferably, the bottom of the movable pressing plate extends through the inner bottom of the measuring cavity; and the side wall of the movable pressing plate is arranged in contact with the inner wall of the measuring cavity.

[0009] Preferably: a first inclined surface is provided on the side end of the movable pressing plate; and a second inclined surface corresponding to the first inclined surface is provided on the fixed pressing plate located inside the measuring cavity;

[0010] Furthermore, the inner diameter of the opening of the measuring cavity in the direction close to the motion driving mechanism is larger than the inner diameter of the opening of the measuring cavity in the direction away from the motion driving mechanism.

[0011] Preferably: the motion drive mechanism includes a lifting drive member, a lifting guide rail and a support assembly; the lifting drive member is connected to the lifting guide rail and is drivingly connected to the support assembly; one end of the support assembly is limitedly and movably connected to the lifting guide rail; the other end of the support assembly is connected to the fixed pressure plate.

[0012] Preferably: the battery thickness measuring device also includes a frame and a thickness measuring sensor; the motion drive mechanism is connected to the frame; and the fixed pressure plate is arranged above the frame; the frame is used to place the product to be measured for thickness; the thickness measuring sensor is connected to the frame and is arranged toward the movable pressure plate.

[0013] Preferably, the thickness measuring sensor is a laser displacement sensor.

[0014] Preferably, a measurement guide cover is provided at the bottom of the laser displacement sensor; and an opening of the measurement guide cover is arranged toward the fixed pressure plate.

[0015] Preferably, a limit block and a pushing mechanism are provided on the upper surface of the frame; and the movable pressing plate is arranged between the pushing mechanism and the limit block.

[0016] Preferably: the pushing mechanism includes a pushing drive, a connecting block and a pushing plate; the pushing drive is connected to the frame and is drivingly connected to one end of the connecting block; the other end of the connecting block is connected to the pushing plate; the pushing plate can move toward the limit block.

[0017] The beneficial effect of the present invention lies in that after the fixed pressure plate is moved to the position required for measurement through the motion drive mechanism, the product to be measured is placed in the measuring cavity inside it, and then the movable pressure plate is brought into contact with the product to be measured to form a distance difference between the movable pressure plate and the fixed pressure plate, thereby reversely calculating the thickness of the product to be measured, thereby improving the convenience of operation and avoiding the problem of increased measurement errors caused by loosening or deformation of the upper and lower pressure plates during continuous use; and reducing the difficulty of calibration, improving the accuracy of measurement, and ensuring measurement efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following will refer to the attached Figures 1 to 4 To describe the features, advantages and technical effects of exemplary embodiments of the present invention.

[0019] Figure 1 This is a schematic structural diagram of a battery thickness measuring device according to an embodiment of the present invention;

[0020] Figure 2 This is a structural schematic diagram of a fixed pressing plate and a movable pressing plate of a battery thickness measuring device according to an embodiment of the present invention;

[0021] Figure 3 This is a schematic structural diagram of a battery thickness measuring device according to an embodiment of the present invention;

[0022] Figure 4 This is a structural schematic diagram of the pushing mechanism of a battery thickness measuring device according to one embodiment of the present invention.

[0023] In the figure: 1- movable pressure plate; 11- first inclined surface; 2- fixed pressure plate; 21- measuring chamber; 22- second inclined surface; 3- motion drive mechanism; 31- lifting drive member; 32- lifting guide rail; 33- support assembly; 331- support plate; 332- connecting bracket; 4- frame; 41- limit block; 5- pushing mechanism; 51- pushing drive member; 52- connecting block; 53- pushing plate; 54- sliding block; 55- slide rail; 6- thickness sensor; 61- measuring guide cover. DETAILED DESCRIPTION

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0025] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0026] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0027] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, or multiple situations exist. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0028] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0029] The following is combined with Figures 1 to 4 The present invention is further described in detail, but is not intended to limit the present invention.

[0030] like Figure 1 and 2 As shown, in one embodiment of the present invention, the battery thickness measuring device includes a movable pressure plate 1, a fixed pressure plate 2 and a motion drive mechanism 3; the fixed pressure plate 2 is connected to the motion drive mechanism 3 so that the fixed pressure plate 2 can move toward the product to be measured (Z-axis direction); and a measuring cavity 21 is provided in the fixed pressure plate 2; the movable pressure plate 1 is movably arranged inside the measuring cavity 21; and the movable pressure plate 1 is used to abut against the product to be measured.

[0031] The technical solution of the present invention moves the fixed pressure plate to the position required for measurement through the motion drive mechanism, places the product to be measured in thickness through the measuring cavity inside it, and then forms a distance difference between the movable pressure plate and the fixed pressure plate through the abutment movement of the product to be measured, so as to reversely calculate the thickness of the product to be measured, thereby improving the convenience of operation and avoiding the problem of increased measurement error caused by loosening or deformation of the upper and lower pressure plates during continuous use; and reducing the difficulty of calibration, improving the accuracy of measurement, and ensuring measurement efficiency.

[0032] Specifically, in some embodiments, Figure 2 As shown, the measuring cavity 21 extends through the thickness direction of the fixed platen 2. That is, the product to be measured is placed into the measuring cavity 21 from below. The fixed platen 2 limits the product, and under the gravity of the movable plate 1 and the upward contact force of the product to be measured, the product can be prevented from slipping, thereby reducing the need for the driving power source of the movable plate. This reduces calibration difficulty, improves measurement accuracy, and ensures measurement efficiency.

[0033] Specifically, in some embodiments, Figure 1 and 2As shown, the bottom of the movable platen 1 extends through the inner bottom of the measuring cavity 21, and the sidewalls of the movable platen 1 abut against the inner wall of the measuring cavity 21. In other words, by abutting and placing the movable platen 1 inside the measuring cavity 21, convenient up and down movement can be achieved. Under the action of the gravity of the movable platen 1 and the upward abutting force of the product to be measured, the product to be measured can be prevented from slipping, reducing the input operation of the driving power source of the movable platen, thereby reducing the difficulty of calibration, improving measurement accuracy, and ensuring measurement efficiency. It also avoids the problem of increased measurement errors caused by loosening or deformation of the upper and lower platens during continuous use.

[0034] Specifically, in some embodiments, Figure 2 As shown, the side end of the movable pressure plate 1 is provided with a first inclined surface 11; the fixed pressure plate 2 is provided with a second inclined surface 22 corresponding to the first inclined surface 11 inside the measuring cavity 21, so that the inner diameter of the opening of the measuring cavity 21 close to the motion drive mechanism 3 is larger than the inner diameter of the opening of the measuring cavity 21 away from the motion drive mechanism 3. In other words, the inner diameter of the bottom of the measuring cavity 21 is smaller than the inner diameter relatively above. This structure can ensure the stability of the assembly of the movable pressure plate 1 and can ensure the orderly progress of thickness measurement. The inclination angle α of the first inclined surface 11 satisfies: 10°≤α≤50°; preferably 45°.

[0035] Specifically, in some embodiments, Figure 1 and 3 As shown, the motion drive mechanism 3 includes a lifting drive member 31, a lifting guide rail 32 and a support assembly 33; the lifting drive member 31 is connected to the lifting guide rail 32 and is drivingly connected to the support assembly 33; one end of the support assembly 33 is movably connected to the lifting guide rail 32; the other end of the support assembly 33 is connected to the fixed pressure plate 2. The lifting drive member 31 can be a power source formed by a lifting drive cylinder or a lifting drive screw. Figure 3 As shown, the support assembly 33 includes a support plate 331 and an engagement bracket 332. One end of the support plate 331 is movably connected to the lifting guide rail 32. The engagement bracket 332 is connected to the support plate 331. The bottom of the engagement bracket 332 is connected to the fixed pressure plate 2. Furthermore, the engagement bracket 332 is an L-shaped engagement bracket. The fixed pressure plate 2 is detachably connected to the bottom of the L-shaped engagement bracket via bolts. The support plate 331 is a straight or U-shaped support plate.

[0036] Specifically, in some embodiments, Figure 3As shown, the battery thickness measurement device also includes a frame 4 and a thickness sensor 6; the motion drive mechanism 3 is connected to the frame 4; and the fixed platen 2 is disposed above the frame 4. The frame 4 is used to place the product to be measured; the thickness sensor 6 is connected to the frame 4 and is positioned toward the movable platen 1. In other words, the product to be measured is placed in the measurement chamber, and the movable platen is then brought into contact with the product to form a distance difference between the movable and fixed platens. Finally, this distance difference is measured by the thickness sensor 6, which in turn determines the product's thickness. This reduces calibration difficulty, improves measurement accuracy, and ensures measurement efficiency.

[0037] Specifically, in some embodiments, Figure 3 As shown, the thickness sensor 6 is a laser displacement sensor; and a measuring guide cover 61 is provided at the bottom of the laser displacement sensor; the opening of the measuring guide cover 61 is arranged toward the fixed pressure plate 2. Among them, the measuring guide cover 61 is a hollow guide structure with a diameter at the upper end smaller than the diameter at the lower end. In other words, the distance the movable plate 1 moves upward is quickly and accurately obtained by the laser displacement sensor, thereby knowing the thickness of the battery; and by measuring the guide cover 61, external light or other interference factors can be prevented from affecting the path of the laser, thereby reducing the difficulty of calibration, improving the accuracy of measurement, and ensuring measurement efficiency. Among them, the laser displacement sensor is a sensor that uses laser technology for measurement. It consists of a laser, a laser detector, and a measuring circuit. The laser sensor is a new type of measuring instrument. It can accurately measure changes in the position, displacement, and other changes of the object being measured without contact.

[0038] Specifically, in some embodiments, Figure 1 and 3 As shown, the upper surface of the frame 4 is provided with a stopper 41 and a pusher mechanism 5; the movable pressure plate 1 is disposed between the pusher mechanism 5 and the stopper 41. In other words, after the thickness measurement is completed, the pusher mechanism 5 pushes the product to be measured aside to prepare for the next thickness measurement operation; this also prevents the product from falling or being damaged after the thickness measurement is completed.

[0039] Wherein, in some embodiments, Figure 3 and 4 As shown, the pushing mechanism 5 includes a pushing drive 51, a connecting block 52 and a pushing plate 53; the pushing drive 51 is connected to the frame 4 and is drivingly connected to one end of the connecting block 52; the other end of the connecting block 52 is connected to the pushing plate 53; the pushing plate 53 can move toward the limit block 41. The pushing drive 51 can be a power source formed by a pushing drive cylinder or a pushing drive screw. Further, as Figure 4As shown, the pushing mechanism 5 also includes a sliding block 54 and a sliding rail 55; the sliding rail 55 is fixedly connected to the frame 4; one end of the sliding block 54 is movably connected to the sliding rail 55; the other end of the sliding block 54 is connected to the connecting block 52. This structure can achieve a directional pushing operation and prevent the product from falling or being damaged after the thickness measurement is completed.

[0040] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0041] Based on the disclosure and teachings of the above description, those skilled in the art will be able to make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments described above. Any obvious improvements, substitutions, or modifications made by those skilled in the art based on the present invention fall within the scope of protection of the present invention. In addition, although certain specific terms are used in this description, these terms are for convenience only and do not constitute any limitation on the present invention.

Claims

1. A battery thickness measuring device, characterized in that: It includes a movable pressing plate, a fixed pressing plate and a motion driving mechanism; the fixed pressing plate is connected to the motion driving mechanism; and a measuring cavity is provided in the fixed pressing plate; the movable pressing plate is movably arranged inside the measuring cavity; and the movable pressing plate is used to abut against the product to be measured in thickness.

2. The battery thickness measuring device according to claim 1, characterized in that: The measuring cavity is arranged to pass through the thickness direction of the fixed pressing plate.

3. The battery thickness measuring device according to claim 1, characterized in that: The bottom of the movable pressing plate extends through the inner bottom of the measuring cavity; and the side wall of the movable pressing plate is arranged to abut against the inner wall of the measuring cavity.

4. The battery thickness measuring device according to claim 1, characterized in that: The side end of the movable pressing plate is provided with a first inclined surface; the fixed pressing plate is located inside the measuring cavity and is provided with a second inclined surface corresponding to the first inclined surface; Furthermore, the inner diameter of the opening of the measuring cavity in the direction close to the motion driving mechanism is larger than the inner diameter of the opening of the measuring cavity in the direction away from the motion driving mechanism.

5. The battery thickness measuring device according to claim 1, characterized in that: The motion drive mechanism includes a lifting drive member, a lifting guide rail and a support assembly; the lifting drive member is connected to the lifting guide rail and is drivingly connected to the support assembly; one end of the support assembly is limitedly and movably connected to the lifting guide rail; the other end of the support assembly is connected to the fixed pressure plate.

6. The battery thickness measuring device according to any one of claims 1 to 5, characterized in that: The battery thickness measuring device also includes a frame and a thickness measuring sensor; the motion drive mechanism is connected to the frame; and the fixed pressure plate is arranged above the frame; the frame is used to place the product to be measured for thickness; the thickness measuring sensor is connected to the frame and is arranged toward the movable pressure plate.

7. The battery thickness measuring device according to claim 6, characterized in that: The thickness measuring sensor is a laser displacement sensor.

8. The battery thickness measuring device according to claim 7, characterized in that: A measuring guide cover is provided at the bottom of the laser displacement sensor; an opening of the measuring guide cover is arranged toward the fixed pressing plate.

9. The battery thickness measuring device according to claim 6, characterized in that: A limit block and a material pushing mechanism are provided on the upper surface of the frame; and the movable pressing plate is arranged between the material pushing mechanism and the limit block.

10. The battery thickness measuring device according to claim 9, characterized in that: The pushing mechanism includes a pushing drive, a connecting block and a pushing plate; the pushing drive is connected to the frame and is drivingly connected to one end of the connecting block; the other end of the connecting block is connected to the pushing plate; the pushing plate can move toward the limit block.

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