Battery sealing nail welding detection tool

Abstract

The utility model belongs to the field of battery detection, and particularly relates to a battery sealing nail welding detection tool which positions a battery to be detected through a positioning groove in a base and utilizes a height detection mechanism composed of a vertical rail, a sliding block, a dial indicator and a height adjusting assembly. The height of the sealing nail at the top of the battery and the cover plate or the height from the sealing nail to the bottom of the battery is tested to be the same as that of the battery meeting the welding requirement or not, so that the welding effect of the sealing nail of the battery is judged, and the battery with the sealing nail tilting and protruding after welding due to the fact that the size of the sealing nail is too large or the sealing nail is not correctly placed over a liquid injection hole is mainly eliminated.

Description

Technical Field

[0001] The present application relates to the technical field of battery production, and in particular to a battery sealing nail welding detection tool. Background Art

[0002] With the rapid development of the lithium battery industry, battery life has always been a concern for everyone, and the safety of lithium batteries has also attracted much attention. Thermal runaway, battery seal failure, corrosion and leakage are all safety issues that are of concern. Failure of battery seal welding will cause leakage during battery use, posing a safety hazard to the module or PACK use environment. Therefore, the sealing nail welding must be effective and meet the process standards before the battery leaves the factory.

[0003] After the battery is filled with liquid, it is usually sealed by welding with sealing pins. However, the size of the sealing pins is small and the size error requirement is high. Sealing pins that exceed the standard size cannot be effectively identified and removed before welding. The commonly used method for detecting the welding effect of sealing pins is CCD detection. However, CCD detection cannot 100% identify the situation where the sealing pin is lifted or protruded after welding due to the sealing pin being too large or not properly placed above the liquid filling hole. The sealing welding effect of this battery cannot be guaranteed, and there is a risk of leakage during long-term use. Utility Model Content

[0004] An embodiment of the present application provides a battery sealing nail welding detection tool for detecting the problem of sealing nails warping or protruding after welding due to the sealing nails being too large in size or not being correctly placed directly above the injection hole.

[0005] To achieve the above purpose, the present application provides a battery sealing nail welding detection tool, including:

[0006] A base, with a positioning groove on the top for positioning the bottom of the battery;

[0007] A vertical rail is arranged perpendicular to the base, and the lower end of the vertical rail is fixed to the base;

[0008] A height adjustment assembly, comprising a guide post disposed on the base and arranged side by side with the vertical rail, and a limit ring sleeved on the guide post and adjustable in height on the guide post;

[0009] A slider is slidably disposed on the vertical rail, and a stop rod is provided on a side of the slider close to the guide column. When the slider is lowered to a preset position on the vertical rail, the stop rod abuts against the limit ring to make the slider stationary relative to the vertical rail; and

[0010] A dial indicator is arranged on the slide block and located above the positioning groove. The detection rod of the dial indicator can abut against the sealing cover on the top of the battery when the stop rod abuts against the limiting ring.

[0011] Optionally, a support rod is provided on the slider, one end of the support rod is connected to the slider, and the other end extends above the positioning groove, and the fixing rod of the dial indicator is fixed to one end of the support rod away from the slider.

[0012] Optionally, the limiting ring is loosely matched with the guide column, a threaded through hole is provided on the side of the limiting ring, a fastening screw is threaded into the threaded through hole, and by screwing the fastening screw, the fastening screw can be against or out of contact with the outer wall of the guide column.

[0013] Optionally, a damping member is provided between the limiting ring and the guide column.

[0014] Optionally, the positioning groove is arranged through two opposite sides of the base, and the length of the positioning groove is at least twice the size of the battery in this direction.

[0015] Optionally, the dial indicator includes a dial indicator or a digital dial indicator.

[0016] Optionally, the battery sealing nail welding detection tooling also includes a cylinder, the cylinder body of the cylinder is fixed on the base, the piston rod of the cylinder extends vertically upward, and a push block is also provided on the side of the slider, and the push block is located on the path of the upward movement of the piston rod.

[0017] The beneficial effect of the battery sealing nail welding inspection tool provided by the present application is that compared with the prior art, the battery sealing nail welding inspection tool of the present application positions the battery to be inspected through the positioning groove on the base, and uses the height detection mechanism composed of the vertical rail, the slider, the dial indicator and the height adjustment assembly to test whether the height of the sealing nail on the top of the battery and the cover plate or the height of the sealing nail to the bottom of the battery is the same as the battery that meets the welding requirements, so as to judge the welding effect of the battery sealing nail, mainly to eliminate the battery whose sealing nail is warped or protruding after welding due to the large size of the sealing nail or the sealing nail is not correctly placed above the injection hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] in:

[0020] Figure 1 It is a structural schematic diagram of a battery sealing nail welding detection tooling shown in an embodiment of the present application;

[0021] Figure 2 yes Figure 1 Side view of the battery sealing nail welding inspection tool shown.

[0022] Description of main component symbols:

[0023] 100, base; 101, positioning groove;

[0024] 200, vertical track;

[0025] 300, height adjustment assembly; 310, guide column; 320, limit ring; 330, fastening screw;

[0026] 400, slider; 410, stop rod; 420, support rod;

[0027] 500, dial indicator; 510, detection rod. DETAILED DESCRIPTION

[0028] In order to facilitate the understanding of the present application, the present application will be described more comprehensively with reference to the relevant drawings below. The preferred embodiments of the present application are provided in the drawings. However, the present application can be implemented in many other different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive.

[0029] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0030] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present 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, and therefore should not be understood as a limitation on the present application.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0032] As described in the background technology, sealing pins are generally used for welding after the battery is filled with liquid. Currently, the commonly used method for detecting the welding effect of sealing pins is CCD detection, but CCD detection cannot 100% identify the situation where the sealing pin is lifted or protruded after welding due to the sealing pin being too large or not properly placed above the injection hole. The sealing welding effect of this battery cannot be guaranteed, and there is a risk of leakage during long-term use.

[0033] In order to solve the above problems, the embodiment of the present application provides a battery sealing nail welding detection tool, such as Figure 1 As shown, the battery sealing nail welding detection tool includes a base 100, a vertical rail 200, a height adjustment component 300, a slider 400 and a dial indicator 500.

[0034] A positioning groove 101 for positioning the bottom of the battery is provided on the top of the base 100 . The battery can be positioned by inserting the lower end of the battery to be tested into the positioning groove 101 .

[0035] The vertical rail 200 is disposed perpendicular to the base 100 , and the lower end of the vertical rail 200 is fixed on the base 100 .

[0036] The height adjustment assembly 300 includes a guide column 310 disposed on the base 100 and arranged side by side with the vertical rail 200 , and a limit ring 320 sleeved on the guide column 310 and adjustable in height on the guide column 310 .

[0037] The slider 400 is slidably disposed on the vertical rail 200 , and a stop rod 410 is provided on one side of the slider 400 close to the guide column 310 . When the slider 400 is lowered to a preset position on the vertical rail 200 , the stop rod 410 abuts against the limit ring 320 to keep the slider 400 stationary relative to the vertical rail 200 .

[0038] The dial indicator 500 is disposed on the slider 400 and is located above the positioning groove 101 . The detection rod 510 of the dial indicator 500 can abut against the sealing cover on the top of the battery when the stop rod 410 abuts against the limiting ring 320 .

[0039] In the embodiment of the present application, the battery sealing nail welding inspection tool positions the battery to be inspected through the positioning groove 101 on the base 100, and uses the height detection mechanism composed of the vertical rail 200, the slider 400, the dial indicator 500 and the height adjustment assembly 300 to test whether the height of the sealing nail on the top of the battery and the cover plate or the height of the sealing nail to the bottom of the battery is the same as that of the battery that meets the welding requirements, so as to judge the welding effect of the battery sealing nail, mainly to eliminate the battery whose sealing nail is warped or protruding after welding due to the large size of the sealing nail or the sealing nail is not correctly placed above the injection hole.

[0040] Understandably, the battery sealing nail welding inspection tool mainly uses the dial indicator 500 to test the height of the top plane of the sealing nail from the cover plate or the height from the top plane of the sealing nail to the bottom of the battery after battery welding to judge the welding effect of the battery sealing nail. When the battery is placed on the positioning groove 101 on the base 100, the slider 400 is controlled to move downward along the vertical rail 200. When the detection rod 510 of the dial indicator 500 contacts the top plane of the sealing nail and contacts well, the height from the battery sealing nail to the bottom of the battery is recorded at this time, and the abnormality is eliminated by a certain height standard. After the sealing nail is welded normally, the top plane of the sealing nail is flush with the horizontal plane of the cover plate.

[0041] It should be noted that the function of the height adjustment assembly 300 is to cooperate with the stop rod 410 on the side of the slider 400 to limit the height to which the slider 400 falls during each detection.

[0042] Specifically, the method of using the battery sealing nail welding detection tool is as follows:

[0043] Before use, it is necessary to first set the measurement reference plane of the dial indicator 500: first adjust the position of the limit ring 320 on the guide column 310 to the lowest, put a battery with a qualified sealing nail welded into the positioning groove 101, and move the slider 400 down along the vertical rail 200 until the detection rod 510 of the dial indicator 500 abuts against the top of the sealing nail on the battery and the dial indicator 500 has a certain reading (taking 2mm as an example). At this time, adjust the position of the limit ring 320 on the guide column 310 upward until the limit ring 320 abuts against the stop rod 410 on the side of the slider 400. When the battery of the same size type is tested later, after the battery to be tested is installed, it is only necessary to move the slider 400 downward and make the stop rod 410 on the side of the slider 400 abut against the limit ring 320, and then observe whether the reading of the dial indicator 500 is 2mm;

[0044] During the test, lift up the slider 400, lift up the dial indicator 500, put the battery into the positioning groove 101 of the base 100, and then press down the slider 400 so that the stop rod 410 on the side of the slider 400 is against the limit ring 320. At this time, observe the reading of the dial indicator 500. If the reading is 2mm, it means that the battery welding is normal, that is, the top plane of the sealing nail is flush with the horizontal plane of the cover plate (error range 0.1mm); if the reading is greater than 2mm, it means that the sealing nail is protruding, that is, the top plane of the sealing nail is higher than the horizontal plane of the cover plate (problems such as inclined welding); if the reading is less than 2mm, it means that the sealing nail is concave, that is, the top plane of the sealing nail is lower than the horizontal plane of the cover plate.

[0045] The dial gauge 500 can be a needle dial dial gauge or a digital dial gauge. If the dial gauge 500 can only display positive readings, then a reference plane lower than the top of the cover plate is selected. If a dial gauge 500 capable of positive and negative readings is selected, the top plane of the cover plate can be used as the reference plane. A positive reading means that the sealing nail is protruding, and a negative reading means that the sealing nail is recessed, which is more intuitive.

[0046] It should be noted that the lower end of the detection rod 510 in the dial indicator 500 is a plane (the plane may be equal to or slightly smaller than the plane at the top of the sealing pin). During the detection process, the plane at the lower end of the detection rod 510 contacts the sealing pin, and the part of the sealing pin that first contacts the plane at the lower end of the detection rod 510 is used for judgment.

[0047] In one embodiment, if Figure 1-Figure 2 As shown, a support rod 420 is provided on the slider 400 , one end of the support rod 420 is connected to the slider 400 , and the other end extends above the positioning groove 101 , and the fixing rod of the dial indicator 500 is fixed to the end of the support rod 420 away from the slider 400 .

[0048] In one embodiment, if Figure 1-Figure 2 As shown, the limiting ring 320 is loosely matched with the guide column 310, and a threaded through hole is provided on the side of the limiting ring 320, in which a fastening screw 330 is threaded. By screwing the fastening screw 330, the fastening screw 330 can be against or out of contact with the outer wall of the guide column 310.

[0049] As set above, when adjusting the position of the limit ring 320 on the guide column 310, first loosen the fastening screw 330 so that the limit ring 320 can slide on the guide column 310. After sliding to the target position, tighten the fastening screw 330.

[0050] In another embodiment, a damping member is provided between the stop ring 320 and the guide column 310, and the damping member may be an elastic rubber ring, which is used to provide friction damping between the stop ring 320 and the guide column 310. In this structure, when the position of the stop ring 320 on the guide column 310 needs to be adjusted, the stop ring 320 only needs to be slid forcefully to overcome the damping movement of the damping member.

[0051] In one embodiment, if Figure 1-Figure 2 As shown, the positioning grooves 101 are arranged through two opposite sides of the base 100 , and the length of the positioning grooves 101 is at least twice the size of the battery in this direction.

[0052] With this arrangement, during testing, the batteries to be tested can be inserted one by one from one end of the positioning groove 101, and the tested batteries can be pushed out from the other end of the positioning groove 101, thereby improving the testing efficiency.

[0053] It can be understood that when the battery is a square battery, the length of the positioning groove 101 is at least twice the length of the battery; when the battery is a cylindrical battery, the length of the positioning groove 101 is at least twice the diameter of the battery.

[0054] In one embodiment, the battery sealing nail welding inspection tool also includes a cylinder (not shown in the figure), the cylinder body of the cylinder is fixed on the base 100, the piston rod of the cylinder extends vertically upward, and a push block is also provided on the side of the slider 400, and the push block is located on the upward movement path of the piston rod.

[0055] After testing a battery, the cylinder is used to lift up the slider 400 and the dial indicator 500, so that the battery can be replaced easily and the work intensity of the tester can be reduced.

[0056] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A battery sealing nail welding detection tool, characterized in that: include: A base, with a positioning groove on the top for positioning the bottom of the battery; A vertical rail is arranged perpendicular to the base, and the lower end of the vertical rail is fixed to the base; A height adjustment assembly, comprising a guide post disposed on the base and arranged side by side with the vertical rail, and a limit ring sleeved on the guide post and adjustable in height on the guide post; A slider is slidably disposed on the vertical rail, and a stop rod is provided on a side of the slider close to the guide column. When the slider is lowered to a preset position on the vertical rail, the stop rod abuts against the limit ring to make the slider stationary relative to the vertical rail; and A dial indicator is arranged on the slide block and located above the positioning groove. The detection rod of the dial indicator can abut against the sealing cover on the top of the battery when the stop rod abuts against the limiting ring.

2. The battery sealing nail welding detection tool according to claim 1 is characterized in that: A support rod is provided on the slider, one end of the support rod is connected to the slider, and the other end extends above the positioning groove, and the fixing rod of the dial indicator is fixed to one end of the support rod away from the slider.

3. The battery sealing nail welding detection tool according to claim 1, characterized in that: The limiting ring is loosely matched with the guide column, a threaded through hole is provided on the side of the limiting ring, a fastening screw is threaded in the threaded through hole, and the fastening screw can be screwed to make the fastening screw contact or break away from the outer wall of the guide column.

4. The battery sealing nail welding detection tool according to claim 1, characterized in that: A damping member is arranged between the limiting ring and the guide column.

5. The battery sealing nail welding detection tool according to claim 1, characterized in that: The positioning groove is arranged through two opposite sides of the base, and the length of the positioning groove is at least twice the size of the battery in this direction.

6. The battery sealing nail welding detection tool according to claim 1, characterized in that: The dial indicator includes a needle-disk type dial indicator or a digital display dial indicator.

7. The battery sealing nail welding detection tool according to any one of claims 1 to 6, characterized in that: The battery sealing nail welding detection tool also includes a cylinder, the cylinder body of the cylinder is fixed on the base, the piston rod of the cylinder extends vertically upward, and a push block is also provided on the side of the slider, and the push block is located on the path of the upward movement of the piston rod.

Images