CN212931393U

CN212931393U - Fold detection device of battery tab

Info

Publication number: CN212931393U
Application number: CN202022084381.XU
Authority: CN
Inventors: 王晓娟; 毕长江; 吴洋洋; 陈默
Original assignee: Hefei Guoxuan High Tech Power Energy Co Ltd
Current assignee: Hefei Gotion High Tech Power Energy Co Ltd
Priority date: 2020-09-21
Filing date: 2020-09-21
Publication date: 2021-04-09
Anticipated expiration: 2030-09-21

Abstract

The utility model discloses a fold detection device of battery tab for carry out fold detection to battery tab, including the support, be provided with on the support and be used for mobilizable two sets of displacement sensor, two sets of displacement sensor set up in battery tab top, be provided with C type support on the support, battery tab sets up in the C type groove of C type support, and two sets of displacement sensor are fixed in the C type support in C type groove, and the below of two sets of displacement sensor output all is provided with light receiver, and light receiver is fixed in on the C type support, and two sets of displacement sensor and light receiver set up respectively in the upper and lower two surfaces of battery tab; this application simple structure, convenient operation, the cost of manufacture is low, can be quick detect out the defect that utmost point ear turned over, fold etc. through two sets of displacement sensor, avoid arousing the inside short circuit of battery or influence utmost point ear welding scheduling problem because of utmost point ear defect, improved the fail safe nature of battery.

Description

Fold detection device of battery tab

Technical Field

The utility model relates to a battery tab fold detects technical field, especially relates to a battery tab's fold detection device.

Background

In the manufacturing process of the lithium ion battery, when the pole piece cut by laser passes through a roller, the position of the pole lug is easy to generate non-uniformly distributed shearing force, so that the conditions of slight wrinkles, folding and the like are generated, and the subsequent winding and other processing performances of the pole piece are seriously influenced. The unevenness of the tab not only easily produces cracks at the root of the tab and easily breaks the strip during winding, but also can cause internal short circuit, and during tab welding, the number of effective tabs is reduced, the internal resistance of the battery is increased, the overcurrent capacity is greatly reduced, and the production efficiency and the yield are seriously influenced. To solve the above problems, the CCD detection device is generally adopted at present, and the installation cost is high, so how to timely and effectively detect the tab wrinkles becomes a problem which needs to be solved urgently.

SUMMERY OF THE UTILITY MODEL

Based on the technical problem that the background art exists, the utility model provides a fold detection device of battery utmost point ear detects utmost point ear defect, has improved the fail safe nature of battery.

The utility model provides a pair of fold detection device of battery tab for carry out the fold to battery tab and detect, including the support, be provided with on the support and be used for mobilizable two sets of displacement sensor, two sets of displacement sensor set up in battery tab top.

Further, be provided with C type support on the support, battery tab sets up in the C type groove of C type support, and on two sets of displacement sensor were fixed in the C type support in C type groove, the below of two sets of displacement sensor output all was provided with light receiver, and light receiver was fixed in on the C type support, and two sets of displacement sensor and light receiver set up respectively in the upper and lower two surfaces of battery tab.

Furthermore, a sliding block for fixing the displacement sensor is arranged on the C-shaped support, one displacement sensor is fixed with the sliding block, a groove is formed in the C-shaped support, and the sliding block is movably connected with the groove.

Furthermore, in the two sets of displacement sensors, one displacement sensor is arranged in the welding effective area of the battery tab, and the other displacement sensor is arranged from the root of the battery tab to 1/2 of the tab height.

Furthermore, the displacement sensor monitoring system further comprises a display screen and an alarm, wherein the input end of the display screen is connected with the output end of each displacement sensor, and the output end of each displacement sensor is connected with the alarm.

The utility model provides a pair of fold detection device of battery tab's advantage lies in: the utility model discloses the fold detection device of battery tab that provides in the structure, simple structure, convenient operation, the cost of manufacture is low, through two sets of displacement sensor can be quick detect out the defect that utmost point ear turned over book, fold etc. avoid arousing the inside short circuit of battery or influence utmost point ear welding scheduling problem because of utmost point ear defect, improved the fail safe nature of battery.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic diagram illustrating several cases in tab defect detection;

the device comprises a displacement sensor 1, a battery tab 2, a 3-C-shaped support and a 4-C-shaped groove.

Detailed Description

The technical solutions of the present invention are explained in detail below with reference to specific embodiments, and many specific details are set forth in the following description to provide a thorough understanding of the present invention. The present invention can be embodied in many other forms than those specifically described herein, and it will be apparent to those skilled in the art that similar modifications can be made without departing from the spirit and scope of the invention.

As shown in fig. 1-2, the utility model provides a fold detection device of battery tab for carry out the fold to battery tab 2 and detect, including the support, be provided with on the support and be used for mobilizable two sets of displacement sensor 1, two sets of displacement sensor 1 set up in battery tab 2 top.

The time of two sets of displacement sensors is sheltered from through utmost point ear, can judge that utmost point ear is searched for and has defects such as fold, turn over a book, can set up display screen and alarm simultaneously, and the input of display screen is connected with the output of every displacement sensor 1 respectively, the output is connected with the alarm. The method specifically comprises the following steps: when the detection is carried out, the complete lug passes through, the light sources emitted by the two groups of displacement sensors are shielded, the shielding time is quickly fed back to the display screen, the two groups of shielding time are both complete lugs within a given interval range, if the two groups of shielding time are unqualified, an alarm state is fed back to the alarm, and the lugs need to be smoothed; the device can accurately detect the phenomenon of folding the tab, obviously improves the quality of the battery in the production process, and effectively avoids the problem of safety caused by the circulation of defective products of the folded tab.

Further, be provided with C type support 3 on the support, battery utmost point ear 2 sets up in C type groove 4 of C type support 3, and on two sets of displacement sensor 1 were fixed in C type support 3 of C type groove 4, the below of two sets of displacement sensor 1 output all was provided with light receiver, and light receiver was fixed in on C type support 3, and two sets of displacement sensor 1 and light receiver set up respectively in the upper and lower two surfaces of battery utmost point ear 2. The C-shaped support 3 is provided with a sliding block for fixing the displacement sensor 1, one displacement sensor 1 is fixed with the sliding block, the C-shaped support 3 is provided with a ring line track or a ring-shaped groove, the sliding block is movably connected with the groove, and a calibrated scale is arranged on the ring line track or the ring-shaped groove, so that the specific position of the displacement sensor 1 can be conveniently adjusted.

The arrangement of the C-shaped groove 4 and the sliding block can adjust the positions of the two groups of displacement sensors so as to match and detect the lugs with different sizes; meanwhile, the light receiver can be matched with the displacement sensor, the light receiver receives light emitted by the displacement sensor, when a tab passes through, the light emitted by the displacement sensor is blocked by the tab, and the starting time is recorded; when the light receiver receives the light emitted by the displacement sensor again, the ending time is recorded, and the integrity of the tab can be fed back through the shielding time between the ending time and the starting time.

It should be understood that the sliding block can pass through the groove on the C-shaped bracket 3 through a bolt to realize sliding fixed connection, and can also realize the movement of the sliding block in a manner that the sliding block is connected with a linear module arranged on the C-shaped bracket 3; for the position of the sliding block, preferably two sets of displacement sensors 1 are provided, wherein one displacement sensor 1 is arranged in the welding effective area of the battery tab 2, and the other displacement sensor 1 is arranged at 1/2 from the root of the battery tab 2 to the tab height.

The working process is as follows: this application can carry out utmost point ear fold to the pole piece before the winding and detect to improve and make the battery quality, specifically, one of them sensor is adjusted in utmost point ear welding effective area, and another adjusts in 1/2 departments of utmost point ear root to utmost point ear height, adjusts the position of fixing two sets of displacement sensor, and when battery utmost point ear reachd the detection station, displacement sensor's light will be sheltered from, shelters from the time display on the display screen of connecting. Referring to the attached figure 2, the shading time of the two groups of sensors is matched with the size of a pole lug and the running speed v of the pole piece, and the data of the two groups of sensors improves the detection accuracy. Through the lug integrity fed back by the shielding time, if the unqualified picture 2(a, c and d) exists, the alarm state can be fed back, and the lug needs to be smoothed. The utility model discloses the accurate detection goes out and rolls over utmost point ear phenomenon, is showing the quality that has improved in the battery production process, and the effectual utmost point ear defective products that have avoided roll over are moved down, cause the safety problem.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a fold detection device of battery tab for carry out the fold to battery tab (2) and detect, its characterized in that, includes the support, is provided with on the support to be used for mobilizable two sets of displacement sensor (1), and two sets of displacement sensor (1) set up in battery tab (2) top.

2. The wrinkle detection device for the battery tab according to claim 1, characterized in that a C-shaped support (3) is disposed on the support, the battery tab (2) is disposed in a C-shaped groove (4) of the C-shaped support (3), two sets of displacement sensors (1) are fixed on the C-shaped support (3) of the C-shaped groove (4), a light receiver is disposed below the output ends of the two sets of displacement sensors (1), the light receiver is fixed on the C-shaped support (3), and the two sets of displacement sensors (1) and the light receiver are respectively disposed on the upper and lower surfaces of the battery tab (2).

3. The wrinkle detection device for the battery tab according to claim 2, characterized in that the C-shaped support (3) is provided with a slide block for fixing the displacement sensor (1), one displacement sensor (1) is fixed with one slide block, the C-shaped support (3) is provided with a groove, and the slide block is movably connected with the groove.

4. The wrinkle detection device for battery tabs according to claim 3, characterized in that, in the two sets of displacement sensors (1), one displacement sensor (1) is arranged in the welding effective area of the battery tab (2), and the other displacement sensor (1) is arranged at 1/2 from the root of the battery tab (2) to the tab height.

5. The device for detecting the wrinkles of the battery tabs according to any one of claims 1 to 4, further comprising a display screen and an alarm, wherein the input end of the display screen is respectively connected with the output end of each displacement sensor (1), and the output end of the display screen is connected with the alarm.