Lithium battery tab welding strength detection device

Abstract

The utility model provides a lithium battery tab welding strength detection device which comprises a detection mechanism which comprises a first driving unit, a first sensor, a second driving unit, a second sensor, a pressing plate and a detection plate. The first driving unit is sequentially connected with the first sensor and the pressing plate, the detection plates are fixed at the two ends of the pressing plate respectively, the second driving unit drives the two detection plates to move relatively, and the second driving unit is fixed on the opposite sides of the detection plates. According to the detection mechanism, the first driving unit is started to drive the pressing plate to move downwards, after the pressing plate moves downwards, the lithium battery tab can be pressed from top to bottom through the pressing plate, and therefore the strength of the tab can be conveniently detected from top to bottom, and when transverse detection is needed, the second driving unit can be started to move towards the inner side; the second driving unit moves inwards to drive the detection plate to abut against the lithium battery tab, so that the tab strength can be conveniently detected in the horizontal direction.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium battery welding detection, and particularly relates to a lithium battery tab welding strength detection device. Background Art

[0002] A lithium battery is a battery that uses lithium ions to charge and discharge between positive and negative electrodes. It is a high energy density, long life, lightweight battery technology that is widely used in mobile electronic devices, electric vehicles, and energy storage systems. The lithium battery tab refers to the connecting part of the positive and negative electrodes of the lithium battery, also known as the electrode terminal or electrode column. The positive electrode of a lithium battery is usually made of lithium compounds, and the negative electrode is usually made of carbon materials. The tab is the part that connects the positive and negative electrode materials to the external circuit of the battery. Through the tab, the battery's electrical energy can be output to external devices or charged by an external power source. The tab is usually made of metal material with good conductivity and mechanical strength.

[0003] At present, lithium battery tabs need to be tested during use. A Chinese patent with publication number CN111579364A discloses a lithium battery tab welding strength testing device, including a base, a conveying mechanism is arranged on the upper surface of the base, a first clamping mechanism is arranged inside the conveying mechanism, a moving mechanism is arranged on the upper surface of the base on one side of the conveying mechanism, a second clamping mechanism is installed on the upper surface of the moving mechanism, and a roller mechanism is installed on the lower surface of the moving mechanism. When the present invention is used, according to the length of the lithium battery tab, tension measuring instruments of different lengths can be selected, and two fixing rings on the tension measuring instrument are respectively sleeved on the first fixing rod and the second fixing rod, and the first fixing rod and the second fixing rod are driven into the first fixing groove and the second fixing groove respectively, so that the tension measuring instrument can be fixed, so that tabs of different specifications can be tested by tension measuring instruments of different lengths.

[0004] The above-mentioned lithium battery tab welding strength detection device can only detect cylindrical lithium batteries during use, while large square lithium batteries, such as the tabs of lithium batteries of motor vehicles or electric vehicles, are all installed on the top of the lithium batteries. At this time, the lithium battery tab welding strength detection device cannot be used to detect the lithium battery to be tested, and cannot detect the lithium battery tab welding strength during vertical impact and lateral impact. Therefore, the existing detection device has certain limitations and needs to be improved. Utility Model Content

[0005] The technical problem to be solved by the utility model is how to detect the welding strength of the pole ears of large square lithium batteries.

[0006] The utility model solves the above technical problems through the following technical means:

[0007] The utility model provides a lithium battery tab welding strength detection device, including a detection mechanism, which includes a first drive unit, a first sensor, a second drive unit, a second sensor, a pressure plate and a detection plate; the first drive unit is connected to the first sensor and the pressure plate in sequence, and the detection plates are respectively fixed at both ends of the pressure plate; the second drive unit drives the two detection plates to move relative to each other, and the second drive unit is fixed on the opposite side of the detection plate.

[0008] Beneficial effect: The detection mechanism of the present application starts the first driving unit to drive the pressure plate to move downward. After the pressure plate moves downward, the lithium battery pole ear can be pressed from top to bottom by the pressure plate, so as to facilitate the detection of the pole ear strength from top to bottom. When horizontal detection is required, the second driving unit can be started to move inward. The inward movement of the second driving unit can drive the detection plate to contact the lithium battery pole ear, so as to facilitate the detection of the pole ear strength in the horizontal direction. Therefore, the present application can perform longitudinal pressure detection and lateral pressure detection on the lithium battery pole ear, that is, the lithium battery pole ear can be fully detected.

[0009] Preferably, the first driving unit is a vertically arranged telescopic cylinder.

[0010] Preferably, the second driving unit comprises an electric push rod, the electric push rod is respectively fixed on both sides of the pressure plate, and the detection plate is fixed on the output end of the electric push rod.

[0011] Preferably, a conveying mechanism is included, and the conveying mechanism includes a conveyor belt, and the conveyor belt conveys the lithium battery tabs to the detection position.

[0012] Preferably, it includes a clamping mechanism, which includes a guide rail, a screw rod, a slider, a support frame and a splint, the guide rail is located below the conveyor belt and perpendicular to the conveyor belt, the slider is limited in the guide rail, and the two sliders are driven by the screw rod to move relative to each other, the slider fixes the support frame, and the support frame is perpendicular to the slider, and a splint is fixed at the end of the support frame, and the splint is located above the conveyor belt.

[0013] Preferably, the clamping plate is in a concave shape, and the inner wall of the guide rail and the sliding block are both in a convex shape.

[0014] Preferably, a mounting frame is included, and the detection mechanism is fixed on the mounting frame, so that the detection mechanism is located directly above the clamping mechanism.

[0015] Preferably, it comprises a display mechanism, wherein the display mechanism comprises a support shaft and a display screen, wherein the end of the support shaft is fixedly connected to the display screen, and the display screen contains a control module.

[0016] Preferably, the clamping mechanism is fixed on the top seat, the guide rail sleeve is arranged at the center of the top seat, and the caster assemblies are fixedly connected to the four corners of the bottom of the top seat.

[0017] Preferably, the four corners of the bottom of the top seat are fixedly connected to the base through support columns, and the four corners of the bottom of the base are fixedly connected to the caster assembly.

[0018] The advantages of the utility model are:

[0019] (1) The present application places the lithium battery tabs on a conveyor belt, and the operation of the conveyor belt drives the lithium battery tabs to move. When the lithium battery tabs move the position of the clamping mechanism, the screw is driven to rotate, and the screw drives the slider to slide relative to each other. The slider drives the clamping plates on the support frame to move relative to each other, and then drives the clamping plates to clamp and position the lithium battery tabs, so that the present application can be flexibly adjusted during use to clamp lithium batteries of different sizes.

[0020] (2) The detection mechanism of the present application starts the first driving unit to drive the pressure plate to move downward. After the pressure plate moves downward, the pressure plate can press the lithium battery tab from top to bottom, thereby facilitating the detection of the tab strength from top to bottom. When horizontal detection is required, the second driving unit can be started to move inward. The inward movement of the second driving unit can drive the detection plate to contact the lithium battery tab, thereby facilitating the detection of the tab strength in the horizontal direction. Therefore, the present application can perform longitudinal pressure detection and lateral pressure detection on the tab of the lithium battery, that is, the tab of the lithium battery can be fully detected.

[0021] (3) The present application detects the longitudinal pressure and the lateral pressure by setting a first sensor and a second sensor, and then displays the pressure on a display screen, so that the detection device of the present application can clearly know the strength of the lithium battery tab welding in real time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 2 is a schematic diagram of the structure of a lithium battery tab welding strength detection device according to an embodiment;

[0023] Figure 2 2. It is a bottom view structural schematic diagram of a lithium battery tab welding strength detection device according to an embodiment;

[0024] Figure 3 2 is a schematic diagram of the structure of the clamping mechanism of the lithium battery tab welding strength detection device of the embodiment;

[0025] Figure 4 2 is a schematic diagram of the structure of a detection mechanism of a lithium battery tab welding strength detection device according to an embodiment;

[0026] In the figure: 1. base, 2. support column, 3. caster assembly, 31. support, 32. universal wheel body, 33. limiting plate, 34. fixing screw, 35. anti-skid pad, 36. adjusting button handle, 4. conveying mechanism, 5. clamping mechanism, 51. guide rail, 52. screw rod, 53. slider, 54. support frame, 55. clamping plate, 56. driving motor, 6. conveyor belt, 7. mounting frame, 8. first driving unit, 9. detection mechanism, 91. first sensor, 92. bottom plate, 93. side plate, 94. second driving unit, 95. detection plate, 96. second sensor, 97. bonding plate, 10. top seat, 11. support shaft, 12. display screen. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present utility model 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, and therefore cannot be understood as a limitation of the present utility model; in addition, the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. It should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" and "fixed" 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 a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] Example 1

[0030] refer to Figure 1-4The present embodiment provides a lithium battery tab welding strength detection device, comprising a detection mechanism 9, wherein the detection mechanism 9 comprises a first drive unit 8, a first sensor 91, a pressure plate 92, a side plate 93, a second drive unit 94, a detection plate 95, a second sensor 9 and a bonding plate 97; the first drive unit 8 is a vertically arranged telescopic cylinder, and the output end of the first drive unit 8 is connected to the first sensor 91 and the pressure plate 92 in sequence, and the connection method is welding, riveting or flange connection, threaded connection; two side plates 93 are welded at both ends of the pressure plate 92, respectively, the second drive unit 94 comprises an electric push rod, the electric push rod is passed through the side plate 93 and fixed by thread connection, and the detection plate 95 is connected to the detection plate 95 by thread at the output end of the electric push rod, the electric push rod drives the two detection plates 95 to move relative to each other, the second sensor 96 is fixed to the opposite side of the detection plate 95 by thread, and the second sensor 96 is fixed by thread through the detection plate 95 using the bonding plate 97.

[0031] The side plate 93 is in the shape of a rectangle, and the electric push rod passes through the center of the side plate 93. The detection plate 95 is in the shape of a "convex" character. The output end of the electric push rod is fixedly connected to the protruding part of the detection plate 95, and the center of the remaining rectangular part is passed through by the second sensor 96. The shape of the bonding plate 97 is smaller than the remaining rectangular part of the detection plate 95 and is fixed on the inner side of the detection plate 95.

[0032] The detection mechanism 9 can be suspended at a high place through the connecting frame 7, and the connection method between the detection mechanism 9 and the connecting frame 7 is welding, riveting, or flange connection, threaded connection; the connecting frame 7 can also be suspended at a high place or the detection mechanism 9 can be suspended at a high place through supporting legs (not shown in the figure) and connecting columns (not shown in the figure).

[0033] The detection mechanism 9 of this embodiment is suspended at a high place through the connecting frame 7, and the lithium battery lug welding point is placed directly below the detection mechanism 9. The first driving unit 8 is started to drive the pressure plate 92 to move downward, and the pressure plate 92 presses the lithium battery lug from top to bottom, thereby realizing the longitudinal detection of the lithium battery lug welding strength from top to bottom. When horizontal detection is required, the second driving unit 94 can be started to drive the detection plate 95 to move relative to the detection plate 95, and the detection plate 95 contacts the lithium battery lug welding point, thereby realizing the horizontal detection of the lithium battery lug welding strength; therefore, the present application can perform longitudinal pressure detection and horizontal pressure detection on the lithium battery lug welding strength, that is, the lithium battery lug welding strength can be comprehensively detected.

[0034] Example 2

[0035] refer to Figure 1-4The present embodiment provides a lithium battery pole ear welding strength detection device. The present embodiment differs from the embodiment 1 in that it also includes a conveying mechanism 4 and a clamping mechanism 5; the conveying mechanism 4 includes a conveyor belt 6, and the conveyor belt 6 delivers the lithium battery pole ear to the detection position, and then the lithium battery pole ear is clamped and fixed by the clamping mechanism 5, and then the detection mechanism is started to detect the lithium battery pole ear.

[0036] like Figure 3 As shown, the clamping mechanism 5 includes a guide rail 51, a screw rod 52, a slider 53, a support frame 54, a splint 55 and a driving motor 56. The guide rail 51 is located below the conveyor belt 6 and is perpendicular to the conveyor belt 6. The slider 53 is limited within the two ends of the guide rail 51, and the two sliders 53 are driven by the screw rod 52 to slide relative to each other. The slider 53 is fixed to the support frame 54 by welding. The support frame 54 is arranged vertically on the ground. A splint 55 is fixed at the end of the support frame 54 by welding. The splint 55 is located above the conveyor belt 6. The screw rod 52 is driven by a manual rocker or a motor. The present embodiment uses a motor drive, and the output end of the driving motor 56 is fixed to one end of the screw rod 52 by welding.

[0037] The shape of the clamping plate 55 is concave, and the shapes of the inner wall of the guide rail 51 and the slider 53 are both convex; the concave clamping plate 55 is used to reserve space for the bonding plate 97 of the detection mechanism 9 to facilitate lateral pressure detection, and the convex guide rail 51 and slider 53 are provided to improve the sliding stability of the slider 53 on the inner side of the guide rail 51.

[0038] This embodiment utilizes the cooperation of the conveying mechanism 4 and the clamping mechanism 5 to realize the mechanized detection of the welding strength of the lithium battery tabs. This embodiment places the lithium battery tabs on the conveyor belt 6 of the conveying mechanism 4 in sequence, and the conveyor belt 6 drives the lithium battery tabs to move. When the lithium battery tabs move to the detection position, the clamping mechanism 5 drives the screw rod 52 to rotate through the driving motor 56, and the screw rod 52 drives the slider 53 to slide relative to each other, thereby causing the two clamping plates 55 to move toward the lithium battery tabs, thereby clamping and fixing the lithium battery tabs. At this time, the detection mechanism 9 is used to detect the welding strength of the lithium battery tabs.

[0039] The lithium battery tab welding strength detection device of the present embodiment performs intelligent detection by cooperating with a PLC control system, an infrared sensor and a displacement sensor, thereby improving the practicality of the detection device of the present application.

[0040] Example 3

[0041] refer to Figure 1-4This embodiment provides a lithium battery tab welding strength detection device. This embodiment is different from Embodiment 2 in that it also includes a display mechanism, which includes a support shaft 11 and a display screen 12. The support shaft 11 is welded or riveted to one side of the conveyor belt 6. The top of the support shaft 11 is fixed by welding to the display screen 12, and the display screen 12 contains a control module. The pressure information of the longitudinal pressure detection and the lateral pressure detection obtained by the first sensor 91 and the second sensor 96 can be displayed by the display screen 12, which can more conveniently and timely understand the welding strength of the lithium battery tab.

[0042] Example 4

[0043] Reference Figure 1-4 , this embodiment provides a lithium battery pole ear welding strength detection device. The difference between this embodiment and embodiment 3 is that this embodiment fixes the conveying mechanism 4, the clamping mechanism 5, the connecting frame 7, the detection mechanism 9 and the display mechanism at the same horizontal position to facilitate movement and detection. This embodiment is provided with a top seat 10, and the shape of the top seat 10 is rectangular or circular. This embodiment adopts a rectangular top seat 10. The conveying mechanism 4 is fixed on the top seat 10 by welding or riveting. The conveyor belt 6 of the conveying mechanism 4 is fixed in the middle of the top seat 10 by welding or riveting. The length of the conveyor belt 6 is the same as the length of the long side of the top seat 10. The purpose is to provide a longer conveyor belt 6 to detect more lithium battery tabs; the clamping mechanism 5 is sleeved in the middle of the top seat 10 through a guide rail 51, the guide rail 51 is located below the conveyor belt 6 and is perpendicular to the conveyor belt 6, the connecting frame 7 fixes four support legs to the center of the top seat 10 by welding or riveting, the four support legs are fixed on both sides of the conveyor belt 6, the height of the support legs is higher than the height of the conveyor belt 6, the connecting frame 7 fixes the detection mechanism 9 by threads through four connecting columns, so that the detection mechanism 9 is suspended above the conveyor belt 6, and the display mechanism is fixed at the corner of the top seat 10 by welding or riveting. The purpose of this design is that the present embodiment moves the lithium battery tab welding strength detection device by moving the top seat 10, and it only needs to move the moving top seat 10, and there is no need to move multiple mechanisms multiple times.

[0044] In order to facilitate the movement and fixation of the detection device of this embodiment, the caster assembly 3 is fixedly connected at the four corners of the bottom of the top seat 10 by welding or riveting. The caster assembly 3 includes a support 31, a universal wheel body 32, a limiting plate 33, a fixing screw 34, an anti-skid pad 35 and an adjusting button handle 36. The support 31 is fixed to the four corners of the bottom of the base 1 by threads or flanges, the bottom of the support 31 is connected to the universal wheel body 32 by threads, the universal wheel body 32 is connected to the support 31 by a limiting plate 33, the limiting plate 33 extends to the outside of the center of the base 1, the fixing screw 34 runs through the outer extension of the limiting plate 33, the upper end of the fixing screw 34 is fixed to the adjusting button handle 36 by threads, and the lower end of the fixing screw 34 is fixed to the anti-skid pad 35 by threads. The caster assembly 3 can roll conveniently on the ground through the universal wheel body 32, so as to facilitate the movement and adjustment of the position of the detection device of the embodiment, and facilitate the use of the detection device of the embodiment; when using the detection device of the embodiment, the caster assembly 3 twists the fixed screw 34 to contact the ground, so that the detection device of the embodiment can be placed on the ground more stably; by providing the anti-slip pad 35, the bottom friction of the fixed screw 34 can be increased, so that the detection device of the embodiment can be placed on the ground more stably, and the adjustment button handle 36 can be provided to increase the top friction of the fixed screw 34, so that the overall twisting adjustment of the embodiment is more convenient.

[0045] As a further improvement, the base 1 is connected to the top seat 10 at the four bottom corners through support columns 2, and the support columns 2 are welded to the top seat 10 and the base 1. The purpose of this is to increase the height of the detection device of this embodiment and improve the working comfort of the staff; and then the caster assembly 3 is fixed to the four bottom corners of the base 1 by welding or riveting.

[0046] The use method and principle of the lithium battery tab welding strength detection device of this application are as follows:

[0047] (1) When the detection device is in use, the universal wheel 32 is first used to roll on the ground to facilitate moving the detection device to a specified position. Then, the adjusting knob 36 is twisted to move the fixing screw 34 on the limiting plate 33 downward. At this time, the anti-slip pad 35 contacts the ground so that the detection device can be stably fixed at the specified position.

[0048] (2) The detection device is convenient for flexible use. By setting the clamping mechanism 5 to cooperate with the conveyor belt 6, the detection device can place the lithium battery pole ear on the conveyor belt 6 during use, and the conveyor belt 6 drives the lithium battery pole ear to move. When the lithium battery pole ear moves to the detection position, when the lithium battery pole ear moves to the inside of the mounting frame 7, the drive motor 56 is started to drive the screw rod 52 to rotate, and the screw rod 52 drives the slider 53 to slide relatively on the inside of the guide rail 51, thereby driving the clamping plate 55 on the support frame 54 to move relatively, and driving the clamping plate 55 to clamp and position the lithium battery pole ear, so that the detection device can be flexibly adjusted to clamp lithium battery pole ears of different sizes during use, and it is also convenient to convey the lithium battery pole ear.

[0049] (3) During the use of the detection device, after the lithium battery tab is positioned and clamped, the first driving unit 8 is started to push the pressure plate 92 downward, and the lithium battery tab is pressed from top to bottom through the bottom plate 92, so as to realize the longitudinal detection of the lithium battery tab welding strength from top to bottom. When horizontal detection is required, the second driving unit 94 can be started to drive the detection plate 95 to move relative to the detection plate 95, and the detection plate 95 contacts the lithium battery tab welding position, so as to realize the horizontal detection of the lithium battery tab welding strength. During the detection, the pressure is detected by the first sensor 91 and the second sensor 92. At this time, the pressure information is displayed by the display screen 12 on the support shaft 11, so that the detection device displays the strength of the lithium battery tab welding in real time. The overall practicality is strong and worthy of promotion and use.

[0050] 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 aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A lithium battery tab welding strength detection device, characterized in that: The invention comprises a detection mechanism (9), wherein the detection mechanism (9) comprises a first driving unit (8), a first sensor (91), a second driving unit (94), a second sensor (96), a pressure plate (92) and a detection plate (95); the first driving unit (8) is connected to the first sensor (91) and the pressure plate (92) in sequence, and the detection plates (95) are respectively fixed at both ends of the pressure plate (92); the second driving unit (94) drives the two detection plates (95) to move relative to each other, and the second sensor (96) is fixed on the opposite side of the detection plate (95).

2. The lithium battery tab welding strength detection device according to claim 1, characterized in that: The first driving unit (8) is a telescopic cylinder arranged vertically.

3. The lithium battery tab welding strength detection device according to claim 1, characterized in that: The second driving unit (94) comprises an electric push rod, which is respectively fixed on both sides of the pressing plate (92), and the detection plate (95) is fixed on the output end of the electric push rod.

4. The lithium battery tab welding strength detection device according to claim 1, characterized in that: It comprises a conveying mechanism (4), wherein the conveying mechanism (4) comprises a conveyor belt (6), and the conveyor belt (6) conveys the lithium battery tabs to a detection position.

5. The lithium battery tab welding strength detection device according to claim 4, characterized in that: The invention comprises a clamping mechanism (5), wherein the clamping mechanism (5) comprises a guide rail (51), a screw rod (52), a slider (53), a support frame (54) and a clamping plate (55), wherein the guide rail (51) is located below the conveyor belt (6) and is perpendicular to the conveyor belt (6), wherein the slider (53) is limited in the guide rail (51), and the two sliders (53) are driven by the screw rod (52) to move relative to each other, wherein the slider (53) fixes the support frame (54), wherein the support frame (54) is vertically arranged on the ground, and wherein the clamping plate (55) is fixed at the end of the support frame (54), and wherein the clamping plate (55) is located above the conveyor belt (6).

6. The lithium battery tab welding strength detection device according to claim 5, characterized in that: The clamping plate (55) is in a concave shape, and the inner wall of the guide rail (51) and the sliding block (53) are both in a convex shape.

7. The lithium battery tab welding strength detection device according to claim 1, characterized in that: It comprises a mounting frame (7), the detection mechanism (9) is fixed on the mounting frame (7), and the detection mechanism (9) is located directly above the clamping mechanism (5).

8. The lithium battery tab welding strength detection device according to claim 1, characterized in that: It comprises a display mechanism, which comprises a support shaft (11) and a display screen (12), the end of the support shaft (11) is fixedly connected to the display screen (12), and the display screen (12) contains a control module.

9. The lithium battery tab welding strength detection device according to claim 5, characterized in that: The clamping mechanism (5) is fixed on the top seat (10), the guide rail (51) is sleeved at the center of the top seat (10), and the caster assemblies (3) are fixedly connected at the four corners of the bottom of the top seat (10).

10. The lithium battery tab welding strength detection device according to claim 9, characterized in that: The top seat (10) is fixedly connected to the base (1) at the four corners of the bottom through support columns (2), and the base (1) is fixedly connected to the caster assembly (3) at the four corners of the bottom.

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