CN211402671U - Roll up core utmost point ear short circuit detection device - Google Patents

Abstract

The utility model discloses a short circuit detection device for a roll core lug, which comprises a transmission mechanism, a short circuit tester and a probe fixing block; the probe fixing block is fixed above the transmission plane, and one end of the probe fixing block close to the transmission plane is provided with a first guide groove and at least two second guide grooves which are respectively and correspondingly electrically connected with the two probes; the first metal probes are rotatably and electrically connected in the first guide grooves, and each second guide groove can be rotatably and electrically connected with one second metal probe; the distance length between the adjacent second metal probes is smaller than the length of the outer part of the exposed glue of the positive lug of the winding core. The utility model provides high detection efficiency has shortened check-out time to can avoid rolling up the core and absorbing water, easy operation has saved the cost.

Description

Roll up core utmost point ear short circuit detection device

[ technical field ] A method for producing a semiconductor device

The utility model relates to a battery technology field especially relates to a roll up core utmost point ear short circuit detection device.

[ background of the invention ]

With the increasing demand of the current society for new energy power batteries, particularly lithium ion batteries, the lithium ion batteries have been popularized in public or family fields such as electric buses, logistics vehicles, cars and the like, the rapid updating of the production equipment of the lithium ion power batteries is currently carried out, and under the environment of improving the productivity, saving the production cost, shortening the production period and ensuring the product quality, a plurality of production procedures are gradually upgraded from manual operation to mechanical automatic production.

In the production process of the lithium ion battery, after the positive plate, the negative plate and the diaphragm are wound, the short circuit full-detection test needs to be carried out on the winding core to prevent potential safety hazards caused by the fact that defective products flow into the subsequent processes. The conventional method for detecting the short circuit of the winding core comprises manual detection and automatic detection, a large amount of labor cost is required by using a manual full-detection method, the production efficiency is low, and a large amount of time is required for completing the detection, so that the winding core is exposed for a long time, and the performance of a finished battery is influenced by water absorption of the winding core; the existing automatic detection method of the equipment is generally divided into short circuit tester connecting with metal baffle plate to detect the pole ear of the winding core or positioning detection of the pole ear, wherein the former has the defects that part of electric core is missed to detect and the winding core is influenced to enter the shell because the pole ear is soft and easy to bend and deform, and the latter has larger manufacturing difficulty and high cost.

In view of the above, it is desirable to provide a short circuit detection device for a winding core tab to overcome the above-mentioned drawbacks.

[ Utility model ] content

The utility model aims at providing a roll up core utmost point ear short circuit detection device aims at improving the problem that current roll up core short circuit is examined the test entirely and is leaded to rolling up the core water absorption because of the test time overlength, easy operation, and the cost is lower.

In order to achieve the purpose, the utility model provides a roll core tab short circuit detection device, which comprises a transmission mechanism, a short circuit tester and a probe fixing block; the transmission mechanism comprises a transmission plane for placing the winding core and a power module for driving the transmission plane to move; the short circuit tester comprises a test instrument and two probes electrically connected with the test instrument; the probe fixing block is fixed above the transmission plane, and one end of the probe fixing block close to the transmission plane is provided with a first guide groove and at least two second guide grooves which are respectively and correspondingly electrically connected with the two probes; the first guide grooves are rotatably and electrically connected with the first metal probes, and each second guide groove can be rotatably and electrically connected with one second metal probe; the distance length between the adjacent second metal probes is smaller than the length of the part, exposed out of the glue, of the positive lug of the winding core; 1. the one end that first metal probe is close to roll up the core is inconsistent with roll up a core negative pole ear, at least one the one end that the second metal probe is close to roll up the core is inconsistent with roll up a core positive pole ear and expose the outside portion of gluing.

In a preferred embodiment, the drive plane is a horizontally disposed conveyor belt having a width greater than the maximum length of the two ends of the winding core.

In a preferred embodiment, the first guide groove and the second guide groove are both arranged side by side on the same plane and perpendicular to the movement direction of the transmission plane.

In a preferred embodiment, the second metal probes are arranged at equal intervals.

In a preferred embodiment, the distance between the ends, far away from each other, of the two second metal probes arranged on the farthest sides is longer than the length of the positive electrode tab.

In a preferred embodiment, the first guide groove and the second guide groove both extend in the direction of movement of the transmission plane, so that the maximum perpendicular distances from the transmission plane to the extreme ends of the first metal probe and the second metal probe far away from the probe fixing block when the extreme ends rotate exceed the maximum perpendicular distances from the positive tab and the negative tab to the transmission plane.

In a preferred embodiment, the device further comprises two fixed supports and a cross bar; the two fixed supports are respectively arranged at two ends of the transmission mechanism, the cross rod is connected between the two fixed supports, and the probe fixed block is fixed on the cross rod.

In a preferred embodiment, the ends of the first metal probe and the second metal probe far away from the probe fixing block are in a circular-arc transition cylindrical shape.

In a preferred embodiment, the test meter further comprises an alarm mechanism, wherein the alarm mechanism is electrically connected with the test meter.

In a preferred embodiment, the alarm mechanism comprises a sound emitting component and/or a light emitting component.

The utility model discloses a to roll up the core and place on drive mechanism, when rolling up the core and being driven the motion, be located the first metal probe of the touching of the negative pole ear at core both ends, anodal ear touching second metal probe, thereby detected by the short circuit tester, distance length between the adjacent second metal probe is less than the length that the anodal ear of core exposes the gluey outside part, make roll core homoenergetic when placing in drive mechanism normally examine the test entirely, detection efficiency is improved, detection time is shortened, thereby can avoid rolling up the core and absorb water, and easy operation saves the cost.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

[ description of the drawings ]

Fig. 1 is a schematic front view of a roll core tab short circuit detection device provided by the present invention;

fig. 2 is a schematic cross-sectional view of the apparatus for detecting a short circuit of a core tab shown in fig. 1 in the direction of a.

[ detailed description ] embodiments

In order to make the objects, technical solutions and advantageous technical effects of the present invention more clearly understood, the present invention is further described in detail with reference to the accompanying drawings and the following detailed description. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration only and not by way of limitation.

Referring to fig. 1 and 2, in order to achieve the above object, the present invention provides a roll core tab short circuit detection apparatus 100 for performing a short circuit full test before a roll core of a battery enters a case, and picking out a defective product. The winding core 200 includes a cylindrical main body 210 and two tabs 220 at two opposite ends of the main body, i.e., a positive tab and a negative tab; the tabs are formed by compounding two parts, namely a film 221 and a metal belt 222, wherein the part, exposed out of the film, of the metal belt of the tab 220 is an effective contact part, and the short circuit full test can be performed by respectively electrically connecting the effective contact parts of the tab 220.

The roll core tab short circuit detection device 100 comprises a transmission mechanism 10, a short circuit tester 20 and a probe fixing block 30.

The transmission mechanism 10 comprises a transmission plane 11 for placing a winding core and a power module 12 for driving the transmission plane to move; in this embodiment, the transmission plane 11 is a horizontally arranged conveyor belt, and can continuously move forward under the driving of the power module 12, further, the width of the conveyor belt is greater than the maximum length of two ends of the winding core, that is, greater than the maximum length between the ends of the winding core where the positive electrode tab and the negative electrode tab are relatively far away, so as to avoid the deformation caused by the contact of the tab of the winding core with an object outside the conveyor belt, thereby possibly causing the missing inspection.

The short circuit tester 20 comprises a test instrument 21 and two probes (not shown in the figure) electrically connected with the test instrument 21, the two probes are respectively electrically connected with two tabs 220 of the winding core 200, the test instrument 21 judges whether the winding core is short-circuited through resistance change between the two probes, further, the winding core tab short circuit detection device 100 further comprises an alarm mechanism (not shown in the figure), the alarm mechanism (not shown in the figure) is electrically connected with the test instrument 21, when the test instrument 21 detects that a short circuit phenomenon exists inside the winding core 200, the alarm mechanism (not shown in the figure) can give an alarm to remind an operator to pick out a bad winding core; further, the alarm mechanism (not shown) includes at least one of a sound component (not shown) and a light component (not shown), and the alarm mechanism is reminded by sound and light respectively.

The probe fixing block 30 is fixed above the transmission plane 11, that is, the vertical projection of the probe fixing block 30 is located on the transmission plane 11, specifically, two ends of the transmission mechanism 10 are respectively provided with one fixing support 50, the two fixing supports 50 are connected through a cross rod 60, in this embodiment, the cross rod 60 is located above the transmission plane 11, the extending direction is parallel to the moving direction of the transmission plane 11, and the probe fixing block 30 is fixed on the cross rod 60.

In the embodiment of the present invention, one end of the probe fixing block 30 close to the transmission plane is provided with a first guide groove 31 and at least two second guide grooves 32 which are respectively electrically connected with the two probes correspondingly; wherein the plurality of second guide grooves 32 are electrically connected to the same one of the two probes. The first metal probe 311 is rotatably and electrically connected in the first guide groove 31, each second guide groove 32 is rotatably and electrically connected with one second metal probe 321, specifically, in the first guide groove 31 or the second guide groove 32 (for conciseness of explanation, the metal probes are called together) one end of the first metal probe 311 and one end of the second metal probe 321 are correspondingly fixed in the first guide groove 31 or the second guide groove 32 (for conciseness of explanation, the metal probes are suspended above the transmission plane 11, and the metal probes rotate in the guide grooves by taking one end fixed in the guide grooves as a circle center, therefore, when the metal probes are touched by the movement of the winding core 200 and continuously advance, the end of the metal probes touching the winding core 200 can rotate and lift up, and the movement of the winding core 200 is prevented from being hindered. In addition, when the metal probe is lifted by the tab 220, the metal probe is still in a touch and electric connection state and can continue for a period of time until the distance between the tip of the metal probe and the transmission plane 11 exceeds the maximum distance between the tab 200 and the transmission plane 11 when the tip of the metal probe is lifted, the metal probe is separated from the tab 220 to reset, so that the winding core 200 does not need to be placed vertically to the advancing direction, the positioning operation is omitted, and the efficiency is improved.

Further, the ends of the first metal probe 311 and the second metal probe 321, which are far away from the probe fixing block 30, are cylindrical in arc transition, that is, the end of the metal probe, which touches the winding core 200, is in arc transition, that is, the needle of the metal probe is in a blunt shape, so as to avoid scratching the winding core 200 when touching the main body 210 of the winding core 200, thereby causing additional damage.

In the embodiment of the present invention, the distance between the adjacent second metal probes 321 is less than the length of the portion of the winding core anode tab exposed out of the adhesive; when the transmission plane 11 moves forward, the negative tab at one end of the winding core 200 touches the first metal probe 311, and the positive tab at the other end of the winding core 200 touches the at least one second metal probe 321, so as to form an electric circuit, and the test instrument 21 can perform a short-circuit full-inspection test on the winding core 200; specifically, the length of the effective contact part of the positive tab is greater than the distance between the adjacent second metal probes 321, and is special, the number of the first metal probes 311 is also multiple, the distribution situation is the same as that of the second metal probes 321, therefore, when the second metal probes 321 hang above the transmission plane 11, the placement position of the winding core 200 on the transmission plane 11 is shifted to ensure that at least one of the second metal probes 321 touches the effective contact part of the positive tab, the negative tabs are similar, the operation of positioning the winding core 200 on the transmission plane 11 is omitted, the detection efficiency is improved, the time of exposing and absorbing water of the winding core 200 is reduced, and the battery performance is indirectly improved.

Optionally, the first guide groove 31 and the second guide groove 32 are both disposed side by side on the same plane and perpendicular to the movement direction of the transmission plane 11, that is, all the first metal probes 311 and the second metal probes 321 located in the guide grooves are located on the same plane when being statically perpendicular to each other, the vertical projection of the plane on the transmission plane 11 is perpendicular to the movement direction of the transmission plane, that is, when the central axis of the winding core 200 is disposed perpendicular to the forward direction of the transmission plane 11, the first metal probe 311 touches the negative electrode tab and the second metal probe 321 touches the positive electrode tab simultaneously, which is convenient for the accuracy of detection.

Further, in an embodiment, on the premise that the distance between the adjacent second metal probes 321 is smaller than the effective contact portion of the positive tab, the second metal probes 321 are arranged at equal intervals, so that the second metal probes 321 can be conveniently arranged on the probe fixing block 30, and the same number of second metal probes 321 can achieve the best effect.

Furthermore, in an embodiment, the distance between the ends of the two second metal probes 321 that are far away from each other and located on the two farthest sides is longer than the length of the positive tab, that is, the distribution width of the second metal probes 321 can completely cover the length of the positive tab, so that when the winding core 200 enters the area of the second metal probes 321, the effective contact portion of the positive tab can be ensured to touch the second metal probes 321.

Optionally, the first guide groove 31 and the second guide groove 32 both extend in the direction of movement of the transmission plane 11, so that the maximum perpendicular distance between the first metal probe 311 and the second metal probe 321, which are far away from the end of the probe fixing block 30, and the transmission plane 11 all exceeds the maximum perpendicular distance between the tab 220 and the transmission plane 11, that is, the guide grooves limit the rotation of the metal probes, and only can rotate in the direction of movement of the transmission plane 11, and the core 200 cannot be obstructed to pass through during rotation, thereby avoiding the deformation of the tab 220 and improving the quality of the image product.

The utility model discloses a to roll up core 200 and place on drive mechanism 10, when rolling up core 200 and being driven the motion, be located the first metal probe 311 of the touching of the negative pole ear at core 200 both ends, anodal ear touching second metal probe 321, thereby detected by short-circuit tester 20, distance length between the adjacent second metal probe 321 is less than the length that the anodal ear of roll core exposes the gluey outside part, make roll core 200 place in drive mechanism 10 the homoenergetic by normal full test, the detection efficiency is improved, the check time is shortened, thereby can avoid rolling up core 200 and absorbing water, and the operation is simple, and the cost is saved.

The invention is not limited solely to that described in the specification and the embodiments, and additional advantages and modifications will readily occur to those skilled in the art, and it is not intended to be limited to the specific details, representative apparatus, and illustrative examples shown and described herein, without departing from the spirit and scope of the general concept as defined by the appended claims and their equivalents.

Claims (10)

1. A short circuit detection device for a roll core tab is characterized by comprising a transmission mechanism, a short circuit tester and a probe fixing block; the transmission mechanism comprises a transmission plane for placing the winding core and a power module for driving the transmission plane to move; the short circuit tester comprises a test instrument and two probes electrically connected with the test instrument; the probe fixing block is fixed above the transmission plane, and one end of the probe fixing block close to the transmission plane is provided with a first guide groove and at least two second guide grooves which are respectively and correspondingly electrically connected with the two probes; the first guide grooves are rotatably and electrically connected with the first metal probes, and each second guide groove can be rotatably and electrically connected with one second metal probe; the distance length between the adjacent second metal probes is smaller than the length of the part, exposed out of the glue, of the positive lug of the winding core; the one end that first metal probe is close to roll up the core is inconsistent with roll up a core negative pole ear, at least one the one end that the second metal probe is close to roll up the core is inconsistent with roll up a core positive pole ear and expose the outside portion of gluing.

2. The apparatus of claim 1, wherein the drive plane is a horizontally disposed conveyor belt having a width greater than the maximum length of the two ends of the roll core.

3. The apparatus of claim 1, wherein the first guide slot and the second guide slot are disposed side by side in a same plane and perpendicular to the direction of motion of the driving plane.

4. The apparatus according to claim 3, wherein the second metal probes are equally spaced.

5. The apparatus according to claim 3, wherein the distance between the ends of the two second metal probes located at the farthest sides away from each other is longer than the length of the positive tab.

6. The apparatus according to claim 1, wherein the first guide groove and the second guide groove extend in a direction of movement of the transmission plane, such that a maximum vertical distance between the ends of the first metal probe and the second metal probe, which are away from the probe fixing block, and the transmission plane exceeds a maximum vertical distance between the positive tab and the transmission plane.

7. The apparatus of claim 1, further comprising two mounting brackets and a cross bar; the two fixed supports are respectively arranged at two ends of the transmission mechanism, the cross rod is connected between the two fixed supports, and the probe fixed block is fixed on the cross rod.

8. The apparatus of claim 1, wherein the first and second metal probes are cylindrical with circular arc transition at ends thereof away from the probe fixing block.

9. The core lug short circuit detection device of claim 1, further comprising an alarm mechanism electrically connected to the test meter.

10. The core tab short detection device of claim 9, wherein the alarm mechanism comprises a sound and/or light emitting assembly.

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