Accurate thickness measuring device for square lithium battery

Abstract

The invention relates to a square lithium battery accurate thickness measuring device comprising a conveying area which is provided with a bearing surface, and an object to be measured linearly moves in the conveying area along a fixed direction and is contacted with the bearing surface; the contact part and the conveying area are kept in relative linear movable arrangement, an object to be detected passes through the space between the bearing surface and the contact part, and the contact part is used for movably contacting the object to be detected; and the detection part is used for detecting the position information of the contact part. According to the invention, through the cooperation of the conveying area and the contact part on the device, the batteries can sequentially pass through the device in batches, and the thickness information of the batteries can be accurately obtained through the distance test of the detection part, so that a batch and high-precision test process is realized, and compared with the existing measurement means, the measurement efficiency is improved. The method can fully guarantee the measurement efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of battery detection, and in particular relates to a square lithium battery precision thickness measuring device. Background Art

[0002] In the production process of square lithium batteries, accurate measurement of their thickness is a key technical requirement. However, existing technologies have certain limitations and shortcomings in achieving this goal. Specifically, the main problems currently exist include:

[0003] First, traditional measurement methods usually rely on mechanical measuring tools or relatively crude detection equipment. Although this measurement method is simple and easy to use, it is difficult to achieve the required high level of precision. Although the square lithium battery has a regular shape, its actual thickness is affected by factors such as uneven material thickness and edge sharpness, which makes direct measurement prone to large deviations. Especially in mass production, this error will have a significant impact on product quality.

[0004] Secondly, as the level of lithium battery technology continues to improve, the accuracy requirements for square lithium batteries are also increasing. Traditional measurement technology cannot meet the high-precision requirements, especially when testing the thickness of thin lithium batteries, whose internal structure changes slightly, and conventional measurement tools are difficult to accurately capture these subtle changes.

[0005] Based on the above, existing measuring equipment often has shortcomings such as complex operation and low measurement efficiency, and cannot meet the needs of large-scale, automated production. Especially for the high-speed and high-frequency measurement requirements in the battery manufacturing industry, the existing measurement technology cannot achieve the requirements of fast response and high precision, which reduces production efficiency and increases production costs. Therefore, the development of a precision measuring device for square lithium batteries that can achieve high-precision and fast measurement of lithium battery thickness is of great significance and market potential. Summary of the invention

[0006] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0007] In order to solve the problems in the above background technology, the present invention provides the following technical solutions:

[0008] A square lithium battery precision thickness measuring device, comprising:

[0009] A conveying area having a bearing surface, wherein the object to be tested moves linearly along a fixed direction in the conveying area and contacts the bearing surface;

[0010] The contact part is arranged to be linearly movable relative to the conveying area, and the object to be tested passes between the carrying surface and the contact part, and the contact part is used to movably contact the object to be tested;

[0011] The detection part is used to detect the position information of the contact part.

[0012] As an optimal technical solution for a square lithium battery precision thickness measuring device, it also includes a conveyor belt, which is arranged at a fixed point relative to the conveying area, and the bearing surface is located on the conveyor belt surface.

[0013] As a preferred technical solution for a square lithium battery precision thickness measuring device, the contact portion includes a movable frame that is arranged to slide relative to the conveying area, and a rotating wheel rotatably arranged on the movable frame, and the rotating wheel is used to contact the object to be measured.

[0014] As a preferred technical solution for a square lithium battery precision thickness measuring device, it also includes a driving cylinder that is relatively fixedly arranged with respect to the conveying area, and an output end of the driving cylinder is connected to the movable frame.

[0015] As an optimal technical solution for a square lithium battery precision thickness measuring device, it also includes a base, the conveyor belt is arranged on the base, and the movable frame is slidably connected to the base.

[0016] As a preferred technical solution for a square lithium battery precision thickness measuring device, it also includes a first buffer portion, which has an elastic contraction feature, and the output end of the driving cylinder is connected to the movable frame through the first buffer portion.

[0017] As a preferred technical solution for a square lithium battery precision thickness measuring device, it also includes a position detection component, the position detection component acts on the object to be measured, and the moving frame moves with the position detection component.

[0018] As a preferred technical solution for a square lithium battery precision thickness measurement device, the position detection component includes an infrared transmitter and an infrared receiver which are arranged at a fixed point relative to the conveying area and are located on both sides of the carrying surface.

[0019] As an optimal technical solution for a square lithium battery precision thickness measurement device, it also includes a pressure test element, the movable frame includes an upper bracket and a lower bracket, the upper bracket is slidably connected to the base, the lower bracket and the upper bracket are connected through a second buffer portion, the second buffer portion has an elastic contraction feature, and the pressure test element is used to test the pressure state of the second buffer portion.

[0020] As a preferred technical solution for a square lithium battery precision thickness measurement device, the pressure test element includes an airbag arranged between an upper bracket and a lower bracket, and a pressure sensor arranged in the airbag.

[0021] The square lithium battery precision thickness measuring device provided by the present invention has the following beneficial effects:

[0022] Through the cooperation between the conveying area and the contact part on the device, the batteries can pass through the device in batches in sequence, and the thickness information of the batteries can be accurately obtained through the distance test of the detection part to realize a batch and high-precision testing process. Compared with the existing measurement methods, the present invention can fully guarantee the measurement efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0024] Figure 1 It is a three-dimensional diagram of one embodiment of the present invention.

[0025] Figure 2 For about Figure 1 Front view of .

[0026] Figure 3 For about Figure 1 Interior cutaway view of the structure shown.

[0027] Figure 4 For about Figure 3 A separate illustration of the structure shown in the middle.

[0028] Figure numerals: 1. conveying area; 2. bearing surface; 3. contact part; 301. moving frame; 301a. upper bracket; 301b. lower bracket; 302. rotating wheel; 4. conveyor belt; 5. driving cylinder; 6. base; 7. first buffer part; 8. infrared transmitter; 9. infrared receiver; 10. second buffer part; 11. airbag. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0030] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0032] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0033] Reference Figure 1-4 One embodiment of the present invention provides a square lithium battery precision thickness measurement device, which at least includes the following structures or features:

[0034] A conveying area 1, wherein the conveying area 1 has a carrying surface 2, and the object to be tested (square lithium battery) can be linearly moved along a fixed direction in the conveying area 1, and the bottom can maintain contact with the carrying surface 2;

[0035] The contact part 3 is arranged to be linearly movable relative to the conveying area 1, and the movable direction is non-horizontal. When the object to be tested passes through the conveying area 1, it passes between the carrying surface 2 and the contact part 3. The contact part 3 is used to movably contact the top of the object to be tested;

[0036] The detection part is used to detect the position information of the contact part 3. When the contact part 3 contacts the top of the battery, the distance between the contact part 3 and the bearing surface 2 can be obtained by obtaining the position information of the contact part 3, so as to accurately analyze the thickness information of the battery;

[0037] In the process of realizing batch measurement, the present invention configures conveyor lines on the front and rear sides of the device respectively, so that the batteries to be tested can be continuously transported to the conveying area 1, and then transported away after passing through the conveying area 1, thereby realizing that the batteries pass through the conveying area 1 in batches and completing the thickness test in this process.

[0038] Further, see Figure 1-3Regarding the way the object to be tested passes through the conveying area 1, specifically, the present invention also includes a conveyor belt 4, which is arranged at a relatively fixed point with respect to the conveying area 1. The conveyor belt 4 can be arranged at a fixed position in the conveying area 1. The bearing surface 2 is provided by the belt surface of the conveyor belt 4. When the battery to be tested arrives in the conveying area 1, the battery is conveyed by the conveyor belt 4, so as to achieve the effect of the battery and the bearing surface 2 being fitted together. The belt body of the conveyor belt 4 is a steel belt structure, so as to prevent the thickness from changing due to pressure, so as to ensure the accuracy of the thickness measurement of the battery.

[0039] Further, see Figure 1-4 The contact portion 3 includes a moving frame 301 that is relatively slidably arranged with respect to the conveying area 1, and the sliding path is a straight line. The contact portion 3 also includes a rotating wheel 302 rotatably arranged on the moving frame 301, and the rotating wheel 302 is used to contact the object to be tested. During the movement of the battery to be tested, the rotating wheel 302 contacts and cooperates with it, and the rotating wheel 302 itself rotates, thereby reducing the movement resistance of the battery. By measuring the accurate position of the moving frame 301 on the straight moving path, the distance between the roller and the surface of the conveyor belt 4 can be obtained. The moving frame 301 is configured with a driving force. When the battery reaches the conveying area 1, the moving frame 301 is controlled to move, so that the rotating wheel 302 can be kept in contact with the battery.

[0040] Further, see Figure 3 and Figure 4 Regarding the configuration of the driving force on the mobile rack 301, the present invention also includes a driving cylinder 5 that is relatively fixed to the conveying area 1, and its output end is connected to the mobile rack 301. The driving cylinder 5 can realize the movement process of the mobile rack 301 during its operation.

[0041] Further, see Figure 1-3 The present invention also includes a base 6, the conveyor belt 4 is arranged on the base 6, and the movable frame 301 is slidably connected with the base 6. Through the connection effect of the base 6, the relative fixing effect between the sliding range of the movable part and the setting position of the conveyor belt 4 can be further increased, thereby increasing the stability of the relative positions of the two, thereby ensuring the test effect.

[0042] Further, see Figure 3 and Figure 4 The present invention further includes a first buffer portion 7, which has an elastic contraction feature. The output end of the driving cylinder 5 is connected to the mobile frame 301 through the first buffer portion 7, so that when the driving cylinder 5 controls the mobile frame 301 to move and the mobile frame 301 contacts the battery, the first buffer portion 7 can prevent the contact force between the rotating wheel 302 and the battery from being too large to cause damage to the battery. Specifically, the first buffer portion 7 can be in the form of a spring assembly.

[0043] Furthermore, in order to enable the automatic movement of the mobile frame 301 when the battery arrives at and leaves the conveying area 1, the present invention also includes a position detection component, which acts on whether the object to be tested passes under the rotating wheel 302. The mobile frame 301 is configured to be able to operate according to the detection signal of the position detection component, so that when the battery arrives under the rotating wheel 302, the mobile frame 301 automatically moves to make the rotating wheel 302 contact with the battery. When the battery moves to leave under the rotating wheel 302, the mobile frame 301 automatically moves again to make the rotating wheel 302 move up.

[0044] Specifically, refer to Figure 1-3 The position detection component includes an infrared transmitter 8 and an infrared receiver 9 which are arranged at a fixed point relative to the conveying area 1, and are located on both sides of the carrying surface 2. Specifically, the infrared transmitter 8 and the infrared receiver 9 are symmetrically arranged on both sides of the conveyor belt 4, so as to judge whether the battery reaches under the rotating wheel 302 by blocking light. A signal coordination relationship is established between the infrared transmitter 8 and the infrared receiver 9 and the driving cylinder 5, so that the driving cylinder 5 can automatically move by detecting the signal.

[0045] Further, see Figure 3 and Figure 4 The present invention also includes a pressure test element. The mobile frame 301 includes an upper bracket 301a and a lower bracket 301b. The upper bracket 301a is slidably connected to the base 6. The driving cylinder 5 is used to control the upper bracket 301a to move. The lower bracket 301b is connected to the upper bracket 301a through a second buffer 10. The second buffer 10 has an elastic contraction feature, but the contraction amplitude is small and invisible to the naked eye. The second buffer 10 can be a rubber block. The pressure test element is used to test the pressure state of the second buffer 10;

[0046] In the process of thickness measurement, the upper bracket 301a is moved downward to make the rotating wheel 302 and the battery form full contact, and there is a certain mutual resistance force. At this time, the second buffer part 10 is under pressure. By detecting the position of the upper bracket 301a, the preliminary distance between the rotating wheel 302 and the bearing surface 2, that is, the thickness of the battery, can be obtained. The thickness value needs to be controlled as an integer, the unit is one tenth of a millimeter, and is recorded as the first value. Since the second buffer part 10 is under pressure, a displacement invisible to the naked eye is formed between the lower bracket 301b and the upper bracket 301a. By testing the degree of pressure on the second buffer part 10, the deformation amplitude of the second buffer part 10, that is, the value of the lower bracket 301b The size of the displacement formed relative to the upper bracket 301a is recorded as the second value. Finally, the battery thickness is the first value minus the second value, so that the thickness of the battery can be accurately obtained. For the detection part, a measuring element such as a grating can be used and fixedly configured on the base 6 to test the position of the upper bracket 301a to accurately measure the size of the first value. Through the rotation of the roller, if the battery thickness is uneven during the battery passing through the conveying area 1, the pressure degree of the second buffer will change. Therefore, in the process of the battery passing through the conveying area 1 completely, by observing whether the second value changes, it can be obtained whether the battery thickness is uniform.

[0047] Further, see Figure 3 and Figure 4 Regarding the pressure test element, it includes an airbag 11 arranged between the upper bracket 301a and the lower bracket 301b, and a pressure sensor arranged in the airbag 11. When displacement is formed between the upper bracket 301a and the lower bracket 301b, the airbag 11 is pressurized and the internal pressure increases, which causes the change of the measured value of the pressure sensor, thereby simulating the pressure degree of the second buffer part 10.

[0048] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0049] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A square lithium battery precision thickness measurement device, characterized by: include: A conveying area (1) having a bearing surface (2), wherein the object to be tested moves linearly along a fixed direction in the conveying area (1) and contacts the bearing surface (2); The contact portion (3) is arranged to be linearly movable relative to the conveying area (1), and the object to be tested passes between the carrying surface (2) and the contact portion (3), and the contact portion (3) is used to movably contact the object to be tested; The detection part is used to detect the position information of the contact part (3).

2. The square lithium battery precision thickness measuring device according to claim 1, characterized in that: It also comprises a conveyor belt (4), which is arranged at a fixed point relative to the conveying area (1), and the bearing surface (2) is located on the surface of the conveyor belt (4).

3. The square lithium battery precision thickness measuring device according to claim 2, characterized in that: The contact portion (3) comprises a moving frame (301) which is arranged to slide relative to the conveying area (1), and a rotating wheel (302) which is rotatably arranged on the moving frame (301), and the rotating wheel (302) is used to contact the object to be tested.

4. The square lithium battery precision thickness measuring device according to claim 3, characterized in that: It also includes a driving cylinder (5) which is relatively fixedly arranged with respect to the conveying area (1), and an output end of which is connected to the moving frame (301).

5. The square lithium battery precision thickness measuring device according to claim 3, characterized in that: It also includes a base (6), the conveyor belt (4) is arranged on the base (6), and the movable frame (301) is slidably connected to the base (6).

6. The square lithium battery precision thickness measuring device according to claim 4, characterized in that: It also comprises a first buffer part (7), the first buffer part (7) has an elastic contraction characteristic, and the output end of the driving cylinder (5) and the moving frame (301) are connected via the first buffer part (7).

7. The square lithium battery precision thickness measuring device according to claim 3, characterized in that: It also comprises a position detection component, the position detection component acts on the object to be detected, and the moving frame (301) moves along with the position detection component.

8. The square lithium battery precision thickness measuring device according to claim 4, characterized in that: The position detection component comprises an infrared transmitter (8) and an infrared receiver (9) which are arranged at a fixed point relative to the conveying area (1) and are located on both sides of the carrying surface (2).

9. The square lithium battery precision thickness measuring device according to claim 5, characterized in that: The mobile frame (301) further comprises a pressure test element. The mobile frame (301) comprises an upper bracket (301a) and a lower bracket (301b). The upper bracket (301a) is slidably connected to the base (6). The lower bracket (301b) and the upper bracket (301a) are connected via a second buffer portion (10). The second buffer portion (10) has an elastic contraction feature. The pressure test element is used to test the pressure state of the second buffer portion (10).

10. The square lithium battery precision thickness measuring device according to claim 9, characterized in that: The pressure test element comprises an airbag (11) arranged between an upper bracket (301a) and a lower bracket (301b), and a pressure sensor arranged in the airbag (11).

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