Lossless short-circuit testing device for cylindrical cell tab

Abstract

The utility model discloses a lossless short-circuit testing device for a cylindrical cell tab, which comprises a casing, one side of the casing is provided with a bottom plate, and the upper end of the casing is provided with an overturning cover; the driving assembly is arranged on the upper end face of the bottom plate; the swing assembly is rotationally arranged in the middle of the driving assembly and used for making contact with a to-be-detected battery cell tab; the battery cell positioning seat is fixedly arranged at one end of the shell and is used for placing a cylindrical battery to be detected; and the follower mounting block is fixedly arranged on the end wall of the shell and is used for controlling the start and stop of the driving assembly and the short-circuit tester. Through the arrangement of the swing assembly and the power assembly, the air cylinder is used for pushing, the contact mode of the battery cell tab is changed through the lever principle, the problems of short circuit and appearance caused by scratching the tab in the later period are avoided, the production efficiency is improved, the product quality after detection is improved, and the production cost is saved. And the device is small in size, low in cost, simple in mechanism and easy to repair, and can be suitable for detection work of cylindrical batteries with different diameter specifications.

Description

Technical Field

[0001] The utility model belongs to the technical field of short - circuit testing of battery cells, and particularly relates to a non - destructive short - circuit testing device for the tabs of cylindrical battery cells. Background Art

[0002] As an important form of modern energy storage, lithium batteries are widely used in various electronic products, electric vehicles and other fields. As a type of lithium battery, the short - circuit test after winding is a key link in the production process of lithium batteries. The completion of this step will directly affect the performance and safety of lithium batteries. Currently, the testing methods for battery cells after winding on the production line mainly include testing by touching the positive and negative tabs of the battery cell with the pen tip of a multimeter or testing by pressing the tabs with the mechanical structure of the device. During the testing process, it is easy to cause the tabs to be scratched, resulting in the scrapping of the battery cell. Later, it is necessary to manually identify the appearance of the battery cell. In addition, during the testing, it is extremely vulnerable to external interference, resulting in fluctuations in the test data, affecting the efficiency and causing waste of production capacity.

[0003] In the existing testing schemes, manual testing is affected by factors such as personnel training and experience, and is prone to false alarms, affecting efficiency. Pressing testing is affected by the structure, and the up - and - down adjustment position is limited. During the winding process of the battery cell, the tabs are distributed in a fan - shaped manner, and it is impossible to ensure that each tab is in a uniform and flat state every time, which is easy to scratch the tabs, causing scrapping, greatly affecting the product quality, and even flowing to the subsequent processes, seriously affecting the performance and safety of the battery.

[0004] Therefore, in view of the above problems, it is urgent to design a testing device to improve the testing efficiency of the battery and achieve non - destructive testing of the battery cells of cylindrical batteries. Content of the Utility Model

[0005] The purpose of the utility model is to provide a non - destructive short - circuit testing device for the tabs of cylindrical battery cells to solve the problems raised in the above background art. The following technical solutions are provided: A non - destructive short - circuit testing device for the tabs of cylindrical battery cells, comprising:

[0006] A machine shell, one side of the machine shell is provided with a bottom plate, and the upper end of the machine shell is provided with a flip cover;

[0007] A driving component, fixedly arranged on the upper end surface of the bottom plate;

[0008] A swinging component, rotatably arranged in the middle of the driving component, for contacting the battery cell tabs to be detected;

[0009] A battery cell positioning seat, fixedly arranged at one end of the machine shell, for placing the cylindrical battery to be detected;

[0010] A follower mounting block, fixedly arranged on the end wall of the machine shell, for controlling the start and stop of the driving component;

[0011] The short - circuit tester is fixedly installed in the casing and used to detect the electrode tabs of the battery cell.

[0012] In this technical solution, the cylindrical battery is a cylindrical battery cell of model 26700, which is in a cylindrical shape. Before detection, the cylindrical battery is positioned and fixed on the battery cell positioning seat. The positive and negative electrode tabs are located on both sides of the cylindrical battery. After winding, the positive and negative electrode tabs are asymmetric and are evenly distributed in a fan - shaped manner as a whole. The short - circuit test process: The test voltage in the short - circuit tester is set to 250V, and the positive and negative electrode tabs of the cylindrical battery are connected by a conductive material.

[0013] In any of the above - mentioned technical solutions, further, the driving assembly includes an L - shaped support block fixedly arranged on the bottom plate. One end of the L - shaped support block is fixedly provided with a cylinder mounting plate. One end of the cylinder mounting plate is fixedly provided with a cylinder. One end of the cylinder is fixedly provided with a cylinder mounting plate, and one end of the cylinder mounting plate is fixedly connected to a follower mounting block. The mounting plane of the cylinder mounting plate has an inclined angle with the mounting plane of the bottom plate. A guide groove plate is fixedly opened in the middle of the follower mounting block for linkage with the swinging assembly.

[0014] The swinging assembly includes an optical axis fixedly arranged in the middle of the L - shaped support block. A swing rod is rotatably arranged on the optical axis. A brass pressing piece is fixedly arranged at the other end of the swing rod. A counterweight is also arranged at one end of the swing rod; a follower is also arranged at one end of the swing rod, and one side of the follower is slidably embedded in the guide groove plate.

[0015] In this technical solution, the follower mounting block is fixedly installed at one end of the cylinder mounting plate by screws. Since the installation position of the cylinder mounting plate has a certain inclination angle with the horizontal position. And one end of the follower is slidably embedded in the guide groove plate, and one end of the follower can be fixed at different positions of the swing rod through a nut. At this time, the follower mounting block, the follower, the optical axis and the swing rod form a lever mechanism. By the telescopic movement of the position of the follower mounting block, the swing rod can be driven to swing around the optical axis.

[0016] The short - circuit test mechanism of this application uses a cylinder as the power to drive the overall movement of the cylinder mounting plate and the follower mounting block, and then drives the swing rod to rotate around the optical axis through the follower. Since a brass pressing piece is fixedly arranged at the other end of the swing rod, when the brass pressing piece swings with the swing rod, the brass pressing piece can be lifted to maintain the original position and contact the cylindrical battery to be detected. After the cylindrical battery is placed on the battery cell positioning seat, when the cylinder retracts, the counterweight causes the weight of the head of the swing rod to be unbalanced, and the brass pressing piece tilts towards the battery cell to make contact. This structure avoids excessive contact between the electrode tab and the guide piece when the brass pressing piece contacts the electrode tab of the cylindrical battery of the battery cell, and effectively solves the problems of scratches, wrinkles, bruises, and contamination caused by poor contact of the electrode tab.

[0017] It should be noted that this technical solution only provides the structure and detection solution for the cylindrical battery cell model 26700. By replacing the battery cell positioning seat and adjusting the position of the follower on the guide groove plate, the swing amplitude of the pendulum arm can be changed, thereby being suitable for cylindrical battery cells of different diameters.

[0018] In any of the above technical solutions, further, the short circuit tester also includes a switch button, a signal light and a grating, and the signal light and the grating are used to warn

[0019] In this technical solution, when the mechanism is used, the power is turned on and the signal light comes on. Press the switch button, the cylinder retracts, and the swing assembly moves to contact the battery cell tab. At this time, the follower mounting block controls the cylinder to move for 2 seconds, and the short-circuit tester displays the voltage data. The cylinder is lifted, and the swing assembly is reset and ready. At this time, the displayed parameters confirm whether they are within the process setting range, and the battery cell is removed to complete the test.

[0020] The beneficial effects of this utility model are as follows: by providing a swing assembly and a power assembly, using a cylinder to propel, and using the principle of leverage to change the contact method of the battery cell tabs, this application avoids scratching the tabs and causing short circuits and appearance problems later, thereby increasing production efficiency, improving the quality of the product after testing, and saving production costs. The device is also small in size, low in cost, simple in structure, easy to repair, and can be applied to the testing of cylindrical batteries of different diameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the appearance of the utility model;

[0022] Figure 2 It is a three-dimensional schematic diagram of the drive assembly in the utility model;

[0023] Figure 3 It is a three-dimensional schematic diagram of the swing assembly in the utility model;

[0024] Figure 4 It is a three-dimensional schematic diagram of the swing rod in the utility model;

[0025] Figure 5 It is a three-dimensional schematic diagram of the cylindrical battery in the utility model.

[0026] The reference numerals in the figure are: 10, casing; 11, bottom plate; 12, flip cover; 15, cylindrical battery; 20, power assembly; 21, L support block; 22, cylinder mounting plate; 23, cylinder; 24, cylinder mounting plate; 25, follower mounting block; 26, guide plate; 30, swing assembly; 31, optical axis; 32, rocker arm; 33, brass pressing sheet; 34, counterweight; 35, follower; 40, battery cell positioning seat; 50, follower mounting block; 60, short-circuit tester; 61, switch button; 62, signal light; 63, grating. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0028] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For the convenience of description, the dimensions of each part shown in the drawings are not drawn in actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the said technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0029] Embodiment 1:

[0030] As Figure 1 shown, this embodiment provides a non-destructive short-circuit test device for the tabs of cylindrical battery cells, including:

[0031] A housing 10, with a bottom plate 11 provided on one side of the housing 10, and a flip cover 12 provided at the upper end of the housing 10;

[0032] A driving assembly 20, fixedly arranged on the upper end surface of the bottom plate 11;

[0033] A swinging assembly 30, rotatably arranged in the middle of the driving assembly 20 for contacting the tabs of the battery cells to be detected;

[0034] A battery cell positioning seat 40, fixedly arranged at one end of the housing 10 for placing the cylindrical battery 15 to be detected;

[0035] A follower mounting block 50, fixedly arranged on the end wall of the housing 10 for controlling the start and stop of the driving assembly 20;

[0036] A short-circuit tester 60, fixedly installed in the housing 10 for detecting the tabs of the battery cells.

[0037] In this technical solution, the cylindrical battery 15 is a cylindrical battery cell of model 26700, which is in a cylindrical shape. Before detection, the cylindrical battery 15 is positioned and fixed on the battery cell positioning seat 40. The two sides of the cylindrical battery 15 are the positive and negative electrode tabs respectively. The positive and negative electrode tabs are asymmetric after winding and are evenly distributed in a fan shape as a whole. Short-circuit test process: The test voltage in the short-circuit tester 60 is set to 250V, and the positive and negative electrode tabs of the cylindrical battery 15 are connected by a conductive material.

[0038] In a preferred embodiment of the present utility model:

[0039] As Figures 2 - 4 shown, specifically, the driving assembly 20 includes an L-shaped support block 21, which is fixedly arranged on the bottom plate 11. One end of the L-shaped support block 21 is fixedly provided with a cylinder mounting plate 22. One end of the cylinder mounting plate 22 is fixedly provided with a cylinder 23. One end of the cylinder 23 is fixedly provided with a cylinder mounting plate 24. One end of the cylinder mounting plate 24 is fixedly connected with a follower mounting block 25. The mounting plane of the cylinder mounting plate 22 has an inclined angle with the mounting plane of the bottom plate 11. A guide groove plate 26 is fixedly opened in the middle of the follower mounting block 25 for linkage with the swing assembly 30.

[0040] The swing assembly 30 includes an optical axis 31, which is fixedly arranged in the middle of the L-shaped support block 21. A swing rod 32 is rotatably arranged on the optical axis 31. The other end of the swing rod 32 is fixedly provided with a brass pressing piece 33. A counterweight 34 is also arranged at one end of the swing rod 32; a follower 35 is also arranged at one end of the swing rod 32. One side of the follower 35 is slidably embedded in the guide groove plate 26.

[0041] In this technical solution, the follower mounting block 25 is fixedly installed at one end of the cylinder mounting plate 24 by screws. Since the installation position of the cylinder mounting plate 22 has a certain inclination angle with the horizontal position. And one end of the follower 35 is slidably embedded in the guide groove plate 26, and one end of the follower 35 can be fixed at different positions of the swing rod 32 by nuts. At this time, the follower mounting block 25, the follower 35, the optical axis 31 and the swing rod 32 form a lever mechanism. By the telescopic movement of the position of the follower mounting block 25, the swing rod 32 can be driven to swing around the optical axis 31.

[0042] The short-circuit test mechanism of the present application uses the cylinder 23 as the power to propel the cylinder mounting plate 24 and the follower mounting block 25 as a whole, and then drives the rocker 32 to rotate around the optical axis 31 through the follower 35. Since the brass pressing plate 33 is fixedly set at the other end of the rocker 32, when the brass pressing plate 33 swings with the rocker 32, it can be lifted to maintain the original position and contact the cylindrical battery 15 to be tested. After the cylindrical battery 15 is placed on the battery cell positioning seat 40, when the cylinder 23 retracts, the counterweight block 34 causes the weight of the head of the rocker 32 to lose balance, and the brass pressing plate 33 tilts toward the battery cell. This structure prevents excessive contact between the tab and the guide when the brass pressing plate 33 contacts the battery cell tab of the cylindrical battery 15, effectively solving the problem of scratches, wrinkles, bumps, and contamination on the tab caused by poor contact.

[0043] It should be noted that this technical solution only provides the structure and detection solution for the cylindrical battery cell model 26700. By replacing the battery cell positioning seat 40 and adjusting the position of the follower 35 on the guide groove plate 26, the swing amplitude of the rocker arm 32 can be changed, thereby being suitable for cylindrical battery cells of different diameters.

[0044] In a preferred embodiment of the present invention:

[0045] like Figure 1 As shown, specifically, the short circuit tester 60 further includes a switch button 61, a signal light 62 and a grating 63, the signal light 62 and the grating 63 are used to warn

[0046] In this technical solution, when the mechanism is used, the power is turned on and the signal light 62 lights up. The switch button 61 is pressed, the cylinder 23 retracts, and the swing assembly 30 moves to contact the battery cell tab. At this time, the follower mounting block 50 controls the cylinder 23 to move for 2 seconds, and the short-circuit tester 60 displays the voltage data. The cylinder 23 is lifted, and the swing assembly 30 is reset and ready. At this time, the displayed parameters confirm whether they are within the process setting range, and the battery cell is removed to complete the test.

[0047] The embodiments of the present application are described above in conjunction with the accompanying drawings. Unless there is a conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A non-destructive short-circuit test device for the tabs of cylindrical battery cells, characterized in that, include: A housing (10), wherein a bottom plate (11) is provided on one side of the housing (10), and a flip cover (12) is provided on the upper end of the housing (10); A drive assembly (20) is fixedly arranged on the upper end surface of the base plate (11); A swing assembly (30) is rotatably arranged in the middle of the driving assembly (20) and is used to contact the battery cell tab to be tested; A battery cell positioning seat (40) is fixedly arranged at one end of the housing (10) and is used to place the cylindrical battery (15) to be tested; A follower mounting block (50) is fixedly mounted on the end wall of the housing (10) and is used to control the start and stop of the drive assembly (20); A short circuit tester (60) is fixedly installed in the housing (10) and is used to detect the battery cell tabs.

2. The non-destructive short-circuit test device for the tab of a cylindrical battery cell according to claim 1, wherein, The drive assembly (20) comprises: An L-shaped support block (21) is fixedly arranged on the base plate (11); a cylinder mounting plate (22) is fixedly provided at one end of the L-shaped support block (21); a cylinder (23) is fixedly provided at one end of the cylinder mounting plate (22); a cylinder mounting plate (24) is fixedly provided at one end of the cylinder (23); and a follower mounting block (25) is fixedly connected at one end of the cylinder mounting plate (24).

3. The non-destructive short-circuit test device for the tab of a cylindrical battery cell according to claim 2, wherein, There is an inclined angle between the mounting plane of the cylinder mounting plate (22) and the mounting plane of the base plate (11).

4. The non-destructive short-circuit test device for the tab of a cylindrical battery cell according to claim 2, wherein, A guide slot plate (26) is fixedly provided in the middle of the follower mounting block (25) for linkage with the swing assembly (30).

5. A non-destructive short-circuit test device for the tabs of cylindrical battery cells according to claim 4, characterized in that, The swing assembly (30) includes: An optical axis (31) is fixedly arranged in the middle of the L support block (21); a rocker (32) is rotatably provided on the optical axis (31); a brass pressing plate (33) is fixedly provided at the other end of the rocker (32); a counterweight (34) is also provided at one end of the rocker (32); a follower (35) is also provided at one end of the rocker (32); one side of the follower (35) is slidably embedded in the guide groove plate (26).

6. The non-destructive short-circuit test device for the tab of a cylindrical battery cell according to claim 1, wherein, The short-circuit tester (60) further comprises a switch button (61), a signal light (62) and a grating (63), wherein the signal light (62) and the grating (63) are used for warning.

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