Square lithium battery cell size measuring device

Abstract

The utility model belongs to the technical field of lithium ion batteries, and particularly relates to a square lithium battery cell size measuring device, which comprises a pressing mechanism, a working platform and an infrared sensor, the pressing mechanism is used for pressing a cell, the cell is arranged on the working platform and is positioned through a positioning mechanism, an electromagnetic guide rail is arranged on the working platform, and the infrared sensor is arranged on the working platform. The electromagnetic guide rail is connected with a movable sliding block, the infrared sensor comprises a vertical infrared sensor and a transverse infrared sensor, the vertical infrared sensor and the transverse infrared sensor are used for measuring the thickness and the width of a battery cell respectively, and the vertical infrared sensor and the transverse infrared sensor are installed on the upper portion and the side portion of the movable sliding block respectively. The device is mainly used for measuring the width and thickness of a square lithium battery winding cell. The infrared sensor is adopted, the distance between outermost points of the cambered surface can be measured on the premise that the cambered surface is not compressed so as to determine the actual width of the battery cell, the thickness measuring function of the battery cell is achieved, the measuring precision is high, the structure is simple, and operation is convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium-ion batteries, and in particular relates to a device for measuring the size of a square lithium battery cell. Background Art

[0002] For wound square lithium battery cells, their width and thickness need to be measured during the production process. Unlike laminated cells, wound cells have curved surfaces on both sides. Therefore, when using traditional calipers for measurement, it is impossible to quickly and accurately select the outermost points of the curved surfaces on both sides, and the curved surfaces are relatively soft. When the caliper is clamped, the curved surfaces are easy to deform, resulting in large measurement errors, which leads to inaccurate data and brings certain uncertainties to subsequent production. A Chinese patent discloses a battery cell pole group size test and positioning tool, publication number: CN220472485U. The device uses a cylinder to press and position the battery cell, and the side positioning blocks are against the curved surface of the battery cell. Then, the caliper is used to measure the spacing between the positioning blocks instead of directly measuring the battery cell, which facilitates the selection of the outermost point of the curved surface and improves the measurement accuracy to a certain extent. However, there is still the problem of the positioning block pressing the curved surface. Since the curved surface is soft and easy to deform, the error during measurement is large, and each replacement of the battery cell takes a long time, the operation is inconvenient, and the measurement data is unstable. Utility Model Content

[0003] The purpose of the utility model is to provide a device for measuring the size of a square lithium battery cell to solve the problems existing in the prior art.

[0004] To achieve the above-mentioned purpose, the present utility model provides the following technical solutions: a device for measuring the size of a square lithium battery cell, comprising a clamping mechanism, a working platform and an infrared sensor, wherein the clamping mechanism is used to clamp the cell, the cell is placed on the working platform and positioned by a positioning mechanism, an electromagnetic guide rail is installed on the working platform, a movable slider is connected to the electromagnetic guide rail, the infrared sensor comprises a vertical infrared sensor and a horizontal infrared sensor, which respectively measure the thickness and width of the cell, and the vertical infrared sensor and the horizontal infrared sensor are respectively installed on the upper part and the side of the movable slider.

[0005] Preferably, the pressing mechanism is fixed on a cylinder connecting plate, and the cylinder connecting plate is fixed on the working platform via pillars.

[0006] Preferably, guide pillars are fixed on both sides of the pressure plate, and the guide pillars are slidably matched with the guide sleeves on the cylinder connecting plate.

[0007] Preferably, the pressing mechanism includes a pressure cylinder and a pressure plate, and the pressure plate is fixed on the piston rod of the pressure cylinder.

[0008] Preferably, the pressing plate is paved with rubber.

[0009] Preferably, the area of the pressing plate is larger than the area of the battery cell.

[0010] Preferably, the positioning mechanism includes a positioning cylinder and a positioning block. There are two positioning cylinders, which are correspondingly arranged on the working platform, and the positioning block is fixed on the piston rod of the positioning cylinder.

[0011] Preferably, the working platform is in an I shape, with slots on both sides for installing the electromagnetic guide rail and the infrared sensor. The I-shaped working platform can ensure the uniform force on the battery cell and enable the smooth movement of the infrared ranging device for measurement.

[0012] Preferably, a base is fixed at the bottom of the working platform.

[0013] Preferably, a display screen and buttons are installed on the base.

[0014] The beneficial effects of the present utility model are as follows: This device is mainly used for measuring the width and thickness dimensions of the wound battery cell of a square lithium battery. By using an infrared sensor, the distance between the outermost points of the arc surface can be measured without compressing the arc surface to determine the actual width of the battery cell, and it also has the function of measuring the thickness of the battery cell. The measurement accuracy is high, and the structure is simple and easy to operate. Description of the Drawings

[0015] Figure 1 is a three-dimensional view of one direction of the present utility model;

[0016] Figure 2 is a three-dimensional view of another direction of the present utility model;

[0017] Figure 3 is a top view of the working platform in the present utility model;

[0018] Figure 4 is a partial view of the electromagnetic guide rail in the utility model;

[0019] Description of the reference numerals: 1. Pressing mechanism; 1-1. Pressure cylinder; 1-2. Pressing plate; 2. Working platform; 2-1. Positioning block; 2-2. Positioning cylinder; 3. Central control system; 3-1. Display screen; 3-2. Button; 3-3. Infrared ranging device; 3-3-1. Vertical infrared sensor; 3-3-2. Horizontal infrared sensor; 3-4. Electromagnetic guide rail. Detailed Description of the Embodiment

[0020] It should be noted that, without conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0021] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present invention 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 invention. In addition, terms such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0022] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected", "joined", "fixedly connected", "fixedly joined" 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 invention can be understood through specific circumstances.

[0023] The following will describe in detail the specific implementation manners of the present utility model in conjunction with the drawings and preferred embodiments.

[0024] As Figures 1 - 4 shown, a rectangular lithium battery cell size measuring device includes a pressing mechanism 1, a working platform 2, and a central control system 3. Among them, the pressing mechanism 1 includes a pressure cylinder 1-1 and a pressing plate 1-2. The pressing plate 1-2 contacts the battery cell 4, and a rubber pad is laid on its surface to prevent damage to the battery cell. The surface of the pressing plate 1-2 is larger than the surface of the battery cell 4, ensuring that during the lateral movement of the infrared ranging device 3-3, the infrared rays of the vertical infrared sensor 3-3-1 will not escape from the surface of the pressing plate 1-2.

[0025] The working platform 2 includes a positioning block 2-1 and a positioning cylinder 2-2. The positioning cylinder 2-2 pushes the positioning block 2-1 to reciprocate to achieve the positioning of the battery cell 4. As Figure 3 shown, the positioning block located on the lower side is shorter and can be placed between the tabs of the battery cell 4, and the positioning block on the other side is longer to facilitate the positioning of the battery cell 4. The working platform 2 is in an I-shaped design, ensuring that the pressing mechanism 1 presses the battery cell 4 evenly while being stressed, and slots are provided on both sides for the infrared ranging device 3-3 to move laterally to measure the size of the battery cell.

[0026] The central control system 3 includes a display screen 3-1, a button 3-2 and an infrared sensor 3-3, wherein the infrared sensor 3-3 includes a vertical infrared sensor 3-3-1 and a horizontal infrared sensor 3-3-2; an electromagnetic guide rail 3-4, wherein the infrared sensor 3-3 is installed on a movable slider of the electromagnetic guide rail 3-4, ensuring that the infrared sensor 3-3 is lower than the working platform 2 while moving smoothly horizontally between the slots.

[0027] During use, the battery cell 4 is placed on platform 2, with the shorter positioning block 2-1 aligned between the two tabs on the tab side, and the longer positioning block 2-1 aligned on the non-tab side. By pressing button 3-2, positioning cylinder 2-2 pushes positioning block 2-1 to adjust the position of battery cell 4. Simultaneously, pressure cylinder 1-1 drives pressure plate 1-2 downward to compress battery cell 4. The pressure of both pressure cylinder 1-1 and positioning cylinder 2-2 can be set via central control system 3. After the battery cell 4 is pressed, the infrared distance measuring device 3-3 is started, and the vertical infrared sensor 3-3-1 irradiates the pressure plate 1-2 with infrared rays, and records a height value A. Then the electromagnetic guide rail 3-4 is energized, driving the horizontal infrared sensor 3-3 to move. When it moves to the outermost point of the arc surface of the battery cell 4, the infrared irradiation position of the vertical infrared sensor 3-3-1 changes for the first time, and the horizontal infrared sensor 3-3-2 records a distance a. After the infrared distance measuring device 3-3 continues to move past the arc surface of the battery cell 4, when the vertical infrared sensor 3-3-1 irradiates the large surface of the battery cell 4, the height tends to be consistent, and the height value B is recorded. The infrared distance measuring device 3-3 continues to move, and when the infrared ray of the vertical infrared sensor 3-3-1 irradiates the pressure plate 1-2 again, the horizontal infrared sensor 3-3-2 records a distance b. At this point, the measurement is complete. The electromagnetic guide rail 3-4 is reset and de-energized. The pressure cylinder 1-1 and the positioning cylinder 2-2 then reset the pressure plate 1-2 and the positioning block 2-1. Cell 4 is removed, and the next cell is replaced, and the above steps are repeated. Finally, the cell thickness is measured as AB, and the cell width is measured as ba.

[0028] This patented device can accurately measure the width of a battery cell while still contacting its curved surface, and can also simultaneously measure its thickness. The device's simple structure makes it easy to operate, allowing for simple cell replacement and high measurement accuracy, capable of measuring various types of prismatic batteries and cells.

[0029] For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be considered as the scope of protection of the present invention.

Claims

1. A square lithium battery cell size measuring device, characterized in that: It includes a clamping mechanism, a working platform and an infrared sensor. The clamping mechanism is used to clamp the battery cell. The battery cell is placed on the working platform and positioned by a positioning mechanism. An electromagnetic guide rail is installed on the working platform. A movable slider is connected to the electromagnetic guide rail. The infrared sensor includes a vertical infrared sensor and a horizontal infrared sensor, which measure the thickness and width of the battery cell respectively. The vertical infrared sensor and the horizontal infrared sensor are respectively installed on the upper part and the side of the movable slider.

2. The square lithium battery cell size measuring device according to claim 1, characterized in that: The pressing mechanism is fixed on the cylinder connecting plate, and the cylinder connecting plate is fixed on the working platform through a support.

3. The square lithium battery cell size measuring device according to claim 2, wherein: The pressing mechanism includes a pressure cylinder and a pressure plate, wherein the pressure plate is fixed on the piston rod of the pressure cylinder; guide pillars are fixed on both sides of the pressure plate, and the guide pillars are slidably matched with the guide sleeves on the cylinder connecting plate.

4. The square lithium battery cell size measuring device according to claim 3, wherein: The pressing plate is paved with rubber.

5. The square lithium battery cell size measuring device according to claim 3, wherein: The area of the pressing plate is larger than the area of the battery cell.

6. The square lithium battery cell size measuring device according to claim 1, characterized in that: The positioning mechanism includes a positioning cylinder and a positioning block. There are two positioning cylinders, which are correspondingly arranged on the working platform. The positioning block is fixed on the piston rod of the positioning cylinder.

7. The square lithium battery cell size measuring device according to claim 1, characterized in that: The working platform is in an I-shape with grooves on both sides for installing the electromagnetic guide rail and the infrared sensor.

8. The square lithium battery cell size measuring device according to claim 1, wherein: A base is fixed on the bottom of the working platform.

9. The square lithium battery cell size measuring device according to claim 8, wherein: A display screen and buttons are installed on the base.

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