Device for measuring depth of soft package lithium ion battery cell shell

Abstract

The utility model discloses a depth measuring device for a soft package lithium ion cell shell, which comprises a measuring base body, a positioning reference device, a laser range finder, a gas spring and a controller, and is characterized in that the positioning reference device comprises a sliding seat and a right-angle piece arranged on the sliding seat, and the sliding seat is in sliding fit with the measuring base body in the vertical direction; the right-angle piece is provided with a vertical connecting arm and a horizontal lap joint arm which form a right angle, a vertical positioning surface is arranged on the side surface, far away from the pit corner of the soft package lithium ion battery cell shell, of the vertical connecting arm, and a horizontal reference surface used for being lapped on the upper edge of the pit corner of the soft package lithium ion battery cell shell is arranged at the bottom, facing the bottom surface of the pit corner of the soft package lithium ion battery cell shell, of the horizontal lap joint arm; the laser range finder is vertically mounted on the sliding seat; the gas spring is connected with the positioning reference device; the controller is connected with the laser range finder and the gas spring. The beneficial effects of the utility model are that the positioning is fast, the manual measurement error is eliminated, the depth of the formed aluminum plastic film can be fast identified, the measurement time is saved, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the field of battery core manufacturing, in particular to a depth measurement and positioning device for a soft-package lithium-ion battery core shell. Background Art

[0002] During the manufacturing process of soft-pack lithium-ion batteries, an aluminum-plastic film punching and forming process is used. This punching and forming process has high requirements for the shell depth after the aluminum-plastic film of the lithium-ion battery cell is formed. Currently, digital calipers or marble platforms and dial indicators are commonly used for measurement. That is, the punching depth is measured with a digital caliper, the angular depth of the punching is measured with a manual caliper, and the depth of the shell is determined by the number displayed on the digital caliper display. However, the above measurement technology has the following disadvantages: First, it is difficult to ensure that the caliper is perpendicular to the surface of the aluminum-plastic film when manually holding the digital caliper; second, because the aluminum-plastic film is a soft and easily deformable material, it is difficult to control the force when using a digital caliper, which can easily cause the aluminum-plastic film to deform and affect the measurement results; third, manual handheld caliper measurement increases the cost of scrapping after testing.

[0003] Therefore, there is an urgent need for a measuring device that can quickly locate and eliminate measurement errors caused by improper manual use of digital calipers, while eliminating errors and quickly identifying the depth of the aluminum-plastic film after forming, saving measurement time and improving production efficiency. Summary of the Invention

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a soft-pack lithium-ion battery cell shell depth measurement device to solve the problems of large measurement error and low measurement efficiency in the existing soft-pack lithium-ion battery cell shell depth measurement process.

[0005] In order to solve the above problems, the technical solution adopted by the present utility model is:

[0006] A device for measuring the depth of a soft-pack lithium-ion battery shell, characterized in that it includes a measuring base, a positioning reference device disposed on the measuring base, a laser rangefinder disposed on the positioning reference device, a gas spring disposed on the measuring base, and a controller disposed on the measuring base, wherein the positioning reference device includes a sliding seat and a right-angle piece disposed on the sliding seat, the sliding seat and the measuring base slidingly cooperating in an up-down direction; the right-angle piece includes a vertical connecting arm and a horizontal overlapping arm at right angles to each other, the side of the vertical connecting arm away from the corner of the soft-pack lithium-ion battery shell is provided with a vertical positioning surface, and the bottom of the horizontal overlapping arm facing the bottom surface of the corner of the soft-pack lithium-ion battery shell is provided with a horizontal reference surface for overlapping the upper edge of the corner of the soft-pack lithium-ion battery shell; the laser rangefinder is vertically mounted on the sliding seat and is used to measure the distance between the horizontal reference surface and the bottom surface of the corner of the soft-pack lithium-ion battery shell; the gas spring is connected to the positioning reference device and is used to control the positioning reference device to rise and fall vertically; and the controller is connected to the laser rangefinder and the gas spring.

[0007] Preferably, the laser rangefinder is flush with a horizontal reference plane. The distance measured by the laser rangefinder is the depth of the soft-pack lithium-ion battery casing. The laser rangefinder reflects light toward the object being measured. When an object blocks the light, the laser rangefinder receives the reflected light, thereby measuring the distance from the reflection point to the light source. Because the direction of the laser beam is most consistent and highly concentrated, the laser rangefinder emits reflected light vertically toward the bottom surface of the corner of the soft-pack lithium-ion battery casing, which can greatly increase the accuracy of the measurement data.

[0008] Preferably, the measuring base includes a reference pressure block and a gripping portion arranged on the top of the reference pressure block. The reference pressure block is a block structure with uniform thickness, including a pressing bottom surface, a positioning side surface extending upward from the edge of the pressing bottom surface, and a connecting top surface extending horizontally from the upper end of the positioning side surface and opposite to the pressing bottom surface. The positioning side surface is provided with a vertical through groove connecting the pressing bottom surface and the connecting top surface.

[0009] Preferably, the reference pressing block is a cubic block made of metal that is not easily deformed.

[0010] Preferably, the cross section of the vertical through groove is trapezoidal.

[0011] Preferably, a slider is provided on the sliding seat, and the sliding seat is connected to the reference pressure block through a slider and a vertical through groove that slide with each other, and during the sliding process of the sliding seat, the vertical positioning surface is always in contact with the positioning side surface of the reference pressure block.

[0012] Preferably, a pressure sensor is provided at the overlapping end of the horizontal lap arm, connected to the controller, for measuring the pressure between the horizontal lap arm and the corner of the soft-pack lithium-ion battery housing. This facilitates controlling the amount of force applied when the horizontal lap arm overlaps the upper edge of the corner of the soft-pack lithium-ion battery housing, thereby preventing unnecessary deformation of the corner of the soft-pack lithium-ion battery housing.

[0013] Preferably, the reference pressing block and the gripping portion are integrally formed.

[0014] Preferably, the gripping portion is a strip-shaped structure extending along the length direction of the reference pressing block.

[0015] Preferably, the gripping portion is wrapped with an anti-slip cover.

[0016] During measurement, the aluminum-plastic film is spread flat on the desktop, and the soft-package lithium-ion battery cell shell depth measuring device is directly placed in the pit corner of the soft-package lithium-ion battery cell shell formed by punching. The height of the positioning reference is adjusted by the gas spring so that the horizontal overlapping arm of the positioning reference is overlapped on the upper edge of the pit corner of the soft-package lithium-ion battery cell shell to ensure that the pressure sensor reading does not exceed the preset threshold value. The controller controls the gas spring to stop the action, and the positioning reference stops moving at this time. At this time, the horizontal reference surface at the bottom of the horizontal overlapping arm is the test reference surface and is lightly in contact with the upper edge of the pit corner of the soft-package lithium-ion battery cell shell. During the entire adjustment process, the vertical positioning surface is always in contact with the positioning side surface of the reference pressing block, which can ensure the horizontality of the horizontal reference surface. Then the controller controls the laser rangefinder to start and completes the measurement of the distance between the horizontal reference surface and the bottom surface of the pit corner of the soft-package lithium-ion battery cell shell, that is, the measurement of the depth of the soft-package lithium-ion battery cell shell.

[0017] Compared with the prior art, the advantages of the present invention are:

[0018] (1) Use height standard blocks made of non-deformable materials to directly measure the pit depth, avoiding test scrapping caused by manual use of calipers;

[0019] (2) Reduce the measurement errors caused by manual readings and techniques of digital calipers, and effectively eliminate the measurement errors caused by improper manual use of digital calipers;

[0020] (3) While eliminating errors, the depth of the aluminum-plastic film after forming can be quickly identified, saving measurement time and increasing production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Shown is a structural diagram of the present utility model.

[0022] Figure 2 Shown is a schematic structural diagram of the measuring substrate of the present utility model.

[0023] Figure 3 Shown is a structural schematic diagram of the positioning reference device of the present utility model.

[0024] Figure 4 The display is a schematic diagram of the use of the present utility model.

[0025] In the accompanying description:

[0026] 1- measuring base; 11- reference pressure block; 111- pressing bottom surface; 112- positioning side surface; 113- connecting top surface; 114- vertical through groove; 12- gripping portion; 13- anti-slip sleeve;

[0027] 2-positioning reference device; 21-sliding seat; 211-mounting frame; 22-right angle piece; 221-vertical connecting arm; 2211-vertical positioning surface; 222-horizontal lap arm; 2221-horizontal reference surface; 23-pressure sensor;

[0028] 3- Laser rangefinder;

[0029] 4-gas spring;

[0030] 5-Controller;

[0031] 6-Corners of soft-pack lithium-ion battery shell. DETAILED DESCRIPTION

[0032] The following describes the embodiments of the present application through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present application from the disclosure herein. The present application may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different viewpoints and applications without departing from the spirit of the present application.

[0033] It should be noted that the process equipment or devices not specifically specified in the following embodiments are all conventional equipment or devices in the art.

[0034] In addition, it should be understood that one or more method steps mentioned in this application do not exclude the presence of other method steps before or after the combination step or the insertion of other method steps between these explicitly mentioned steps, unless otherwise specified; it should also be understood that the combination connection relationship between one or more devices / apparatuses mentioned in this application does not exclude the presence of other devices / apparatuses before or after the combination device / apparatus or the insertion of other devices / apparatuses between these two explicitly mentioned devices / apparatuses, unless otherwise specified. Moreover, unless otherwise specified, the numbering of each method step is merely a convenient tool for identifying each method step, and is not intended to limit the order of arrangement of each method step or to define the scope of implementation of this application. Changes or adjustments to their relative relationships, without substantially changing the technical content, should also be considered as the scope of implementation of this application.

[0035] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0036] In the description of this application, it should be understood that the terms "upper", "lower", "left", "right", "inner", "outer", "axial", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise specified, "multiple" means two or more.

[0037] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0038] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0039] The present application is further described below in conjunction with specific embodiments, but the protection scope of the present application is not limited thereto.

[0040] like Figures 1 to 3As shown, the present invention relates to a soft-pack lithium-ion battery cell shell depth measuring device, comprising a measuring base 1, a positioning reference 2 provided on the measuring base 1, a laser rangefinder 3 provided on the positioning reference 2, a gas spring 4 provided on the measuring base, and a controller 5 provided on the measuring base 1. The positioning reference 2 comprises a sliding seat 21 and a right-angle piece 22 provided on the sliding seat 21. The sliding seat 21 and the measuring base 1 are slidably matched in the vertical direction. The right-angle piece 22 has a vertical connecting arm 221 and a horizontal overlapping arm 222 at right angles to each other. The vertical connecting arm 22 1 is provided with a vertical positioning surface 2211 on the side away from the pit corner 6 of the soft-pack lithium-ion battery cell shell, and the bottom of the horizontal overlapping arm 222 facing the bottom surface of the pit corner 6 of the soft-pack lithium-ion battery cell shell is provided with a horizontal reference surface 2221 for overlapping the upper edge of the pit corner 6 of the soft-pack lithium-ion battery cell shell; the laser rangefinder 3 is vertically installed on the sliding seat 21, and is used to measure the distance between the horizontal reference surface 2221 and the bottom surface of the pit corner 6 of the soft-pack lithium-ion battery cell shell; the gas spring 4 is connected to the positioning reference device 2, and is used to drive the positioning reference device 2 to rise and fall vertically; the controller 5 is connected to the laser rangefinder 3 and the gas spring 4.

[0041] like Figure 1 As shown, the laser rangefinder 3 is fixed to the sliding seat 21 via a mounting bracket 211, and the laser rangefinder is flush with a horizontal reference plane. The distance measured by the laser rangefinder is the depth of the soft-pack lithium-ion battery casing. The laser rangefinder emits reflected light toward the object being measured. When an object blocks the light, the laser rangefinder receives the reflected light, thereby measuring the distance from the reflection point to the light source. Because the direction of the laser beam is most consistent and highly concentrated, the laser rangefinder emits reflected light vertically toward the bottom surface of the corner of the soft-pack lithium-ion battery casing, which greatly increases the accuracy of the measurement data.

[0042] like Figure 2 As shown, the measuring base 1 includes a reference pressure block 11 and a gripping portion 12 arranged on the top of the reference pressure block 11. The reference pressure block 11 is a block structure with uniform thickness, including a pressing bottom surface 111, a positioning side surface 112 extending upward from the edge of the pressing bottom surface 111, and a connecting top surface 113 extending horizontally from the upper end of the positioning side surface 112 and opposite to the pressing bottom surface 111. The positioning side surface 112 is provided with a vertical through groove 114 connecting the pressing bottom surface 111 and the connecting top surface 113.

[0043] like Figure 2 As shown, the cross section of the vertical through slot 114 is trapezoidal.

[0044] like Figure 1As shown, the sliding seat 21 is slidably connected to the vertical through slot 114 , and during the sliding process of the sliding seat 21 , the vertical positioning surface 2211 is always in contact with the positioning side surface 112 of the reference pressing block 11 .

[0045] like Figure 1 As shown, a pressure sensor 23 is provided at the overlapping end of the horizontal overlapping arm 222 , and the pressure sensor 23 is connected to the controller 5 for measuring the pressure between the horizontal overlapping arm 222 and the pit corner 6 of the soft-pack lithium-ion battery cell shell.

[0046] like Figure 1 As shown, the reference pressing block and the gripping portion are integrally formed.

[0047] like Figure 1 As shown, the gripping portion is a strip-shaped structure extending along the length direction of the reference pressing block.

[0048] like Figure 1 As shown, the gripping portion 12 is wrapped with an anti-slip cover 13 .

[0049] like Figure 4 As shown, during measurement, the aluminum-plastic film is spread flat on the desktop, and the soft-package lithium-ion battery cell shell depth measuring device is directly placed in the pit corner of the soft-package lithium-ion battery cell shell formed by punching the shell. The height of the positioning reference device 2 is adjusted by the gas spring 4 so that the horizontal lap arm of the positioning reference device 2 is overlapped on the upper edge of the pit corner 6 of the soft-package lithium-ion battery cell shell. The force applied by the horizontal lap arm to the upper edge of the pit corner of the soft-package lithium-ion battery cell shell can be controlled by the reading of the pressure sensor. After the position of the positioning reference device is adjusted, the gas spring stops moving. At this time, the horizontal reference plane at the bottom of the horizontal lap arm is the test reference plane and is tightly attached to the upper edge of the pit corner of the soft-package lithium-ion battery cell shell. During the entire adjustment process, the vertical positioning surface 2211 is always in contact with the positioning side surface 112 of the reference pressing block 11, which can ensure the horizontality of the horizontal reference plane. Then, the laser rangefinder is started to complete the measurement of the distance between the horizontal reference plane 2221 and the bottom surface of the pit corner 6 of the soft-package lithium-ion battery cell shell, that is, the measurement of the depth of the soft-package lithium-ion battery cell shell.

[0050] The above examples are intended to illustrate the embodiments disclosed in the present invention and are not to be construed as limiting the present invention. In addition, the various modifications listed herein and the changes in the methods and compositions of the present invention will be apparent to those skilled in the art without departing from the scope and spirit of the present invention. Although the present invention has been specifically described in conjunction with various specific preferred embodiments of the present invention, it should be understood that the present invention should not be limited to these specific embodiments. In fact, various modifications as described above that are apparent to those skilled in the art to obtain the present invention should be included within the scope of the present invention.

Claims

1. A device for measuring the depth of a soft-pack lithium-ion battery cell shell, characterized in that: The invention comprises a measuring base (1), a positioning reference device (2) arranged on the measuring base (1), a laser rangefinder (3) arranged on the positioning reference device (2), a gas spring (4) arranged on the measuring base, and a controller (5) arranged on the measuring base (1); the positioning reference device (2) comprises a sliding seat (21) and a right-angle piece (22) arranged on the sliding seat (21); the sliding seat (21) and the measuring base (1) are slidably matched in the vertical direction; the right-angle piece (22) has a vertical connecting arm (221) and a horizontal overlapping arm (222) at right angles to each other; the vertical connecting arm (221) is away from the soft-pack lithium-ion battery shell A vertical positioning surface (2211) is provided on the side of the pit corner (6); a horizontal reference surface (2221) for overlapping the upper edge of the pit corner (6) of the soft-pack lithium-ion battery cell shell is provided on the bottom of the horizontal lap arm (222) facing the bottom of the pit corner (6) of the soft-pack lithium-ion battery cell shell; the laser rangefinder (3) is vertically mounted on the sliding seat (21) and is used to measure the distance between the horizontal reference surface (2221) and the bottom of the pit corner (6) of the soft-pack lithium-ion battery cell shell; the gas spring (4) is connected to the positioning reference device (2) and is used to drive the positioning reference device (2) to rise and fall vertically; and the controller (5) is connected to the laser rangefinder (3) and the gas spring (4).

2. The soft-pack lithium-ion battery cell shell depth measuring device according to claim 1, characterized in that: The measuring base (1) comprises a reference pressing block (11) and a gripping portion (12) arranged on the top of the reference pressing block (11); the reference pressing block (11) is a block-shaped structure with uniform thickness, comprising a pressing bottom surface (111), a positioning side surface (112) extending upward from the edge of the pressing bottom surface (111), and a connecting top surface (113) extending horizontally from the upper end of the positioning side surface (112) and opposite to the pressing bottom surface (111); a vertical through groove (114) communicating with the pressing bottom surface (111) and the connecting top surface (113) is provided on the positioning side surface (112).

3. The soft-pack lithium-ion battery cell shell depth measurement device according to claim 2, characterized in that: The cross section of the vertical through groove (114) is trapezoidal.

4. The soft-pack lithium-ion battery cell shell depth measurement device according to claim 2, characterized in that: The sliding seat (21) is slidably connected to the vertical through slot (114), and during the sliding process of the sliding seat (21), the vertical positioning surface (2211) is always in contact with the positioning side surface (112) of the reference pressing block (11).

5. The device for measuring the depth of a soft-pack lithium-ion battery cell shell according to any one of claims 1 to 4, characterized in that: A pressure sensor (23) is provided at the overlapping end of the horizontal overlapping arm (222), and the pressure sensor (23) is connected to the controller (5) and is used to measure the pressure between the horizontal overlapping arm (222) and the pit corner (6) of the soft-pack lithium-ion battery cell shell.

6. The soft-pack lithium-ion battery cell shell depth measurement device according to claim 2, characterized in that: The gripping portion (12) is wrapped with an anti-slip cover (13).

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