IV detection device capable of effectively preventing subfissure of battery piece

Abstract

The utility model discloses an IV detection device capable of effectively preventing subfissure of a battery piece. The IV detection device comprises a probe pressing plate, a supporting assembly, a test module, a first driving part for driving the test module to move up and down, a second driving part for driving the probe pressing plate to move up and down, and a light source positioned above the probe pressing plate, which are sequentially arranged from top to bottom, the supporting assembly comprises a plurality of supporting rods and a plurality of suction nozzles arranged on the supporting rods. The test module comprises a supporting bottom plate and a test circuit board arranged on the supporting bottom plate, and avoiding grooves for avoiding the supporting rods are formed in the supporting bottom plate and the test circuit board; during detection, the supporting rod is located in the avoiding groove, the multiple suction nozzles jointly form an elastic adsorption supporting platform, the platform is higher than the surface of the test circuit board, and the battery piece is located on the platform and pressed downwards through the probe pressing plate to compress the suction nozzles so that the battery piece can be attached to the test circuit board. According to the utility model, the high-density grid line conduction test can be realized, and the hidden crack risk of the battery is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the battery piece manufacturing equipment technical field, especially, relate to a kind of IV detection device of effectively preventing battery piece hidden crack. BACKGROUND

[0002] Solar cell is divided into grades according to photoelectric conversion efficiency after being made, to maximize benefits. The detection of the photoelectric conversion efficiency of the cell is called IV testing. In order to improve the production efficiency of the cell, there are many automatic IV testing devices for the cell on the market.

[0003] The prior art patent CN218841009U discloses a double-half-cell efficiency detection device, which utilizes a rotating mechanism to realize the position flow of the cell between the loading station, the testing station and the unloading station. A vision camera is arranged at the loading station to cooperate with the adjusting mechanism to realize accurate correction of the position of the cell. At the testing station, the upper probe array and the lower probe array are used to clamp the cell from top to bottom to realize electrical conduction with the grid lines on the top and bottom surfaces of the cell, thereby realizing IV detection of the cell. However, the detection device has the following shortcomings:

[0004] (1) For the cell structure with connecting grid lines on both surfaces, there is enough space in the upper and lower surface areas of the cell to layout the upper probe array and the lower probe array, and there is a large error tolerance to ensure the contact conduction of the probe and the grid electrode. However, for the cell with the upper and lower surface grid lines integrated on one surface, the grid line distribution density on the single surface of the cell is doubled. On the one hand, the corresponding density of the probe cannot be laid out in the plane area of the cell, and on the other hand, the contact precision of the probe and the grid electrode is higher. The detection device cannot meet the higher precision requirement of electrical conduction contact.

[0005] (2) During detection, the cell is clamped from top to bottom by the upper probe array and the lower probe array. If the upper and lower contact points are not aligned, the stress points of the cell will be distributed in error, and there is a high risk of hidden crack. For the cell with only one surface having grid lines, the grid line spacing is very small, the probe arrangement is very dense, and the probe diameter is also very small. It is more difficult to accurately align the upper and lower probes, so the cell is also easy to be crushed.

[0006] Therefore, it is necessary to provide a new IV detection device for effectively preventing battery piece hidden crack to solve the above technical problems. UTILITY MODEL CONTENTS

[0007] The main purpose of the utility model is to provide an IV detection device for effectively preventing battery piece hidden crack, which can realize high-density grid line conduction testing and reduce the risk of battery hidden crack.

[0008] The utility model discloses a kind of IV detection devices for effectively preventing battery piece hidden crack, it includes support component for supporting battery piece, test module located below the support component, first driving part driving the up-down movement of the test module, probe pressing plate located above the test module, second driving part driving the up-down movement of the probe pressing plate and light source located above the probe pressing plate.

[0009] The support component includes a plurality of support rods and a plurality of suction nozzles disposed on the support rods.

[0010] During detection, the support rods are located in the avoidance grooves, and the plurality of suction nozzles collectively form an elastic adsorption support platform. The elastic adsorption support platform is higher than the surface of the test circuit board. The battery piece is located on the elastic adsorption support platform and is pressed downward by the probe pressing plate to compress the suction nozzles, so that the battery piece is in contact with the test circuit board to realize electrical connection.

[0011] Further, the movable end of the first driving part is provided with a first support plate, and the first support plate is provided with an XYR fine adjustment module for position correction of the test module. The test module is arranged at the movable end of the XYR fine adjustment module.

[0012] Further, the support component is fixedly arranged at a predetermined height position above the test module or is horizontally rotated by a rotary driving part or a horizontal linear driving part to carry the battery piece for position transfer between different stations.

[0013] Further, the movable end of the second driving part is provided with a second support plate, and the probe pressing plate includes a fixed plate fixed to the second support plate and a plurality of pressing needles arranged on the lower surface of the fixed plate in an array corresponding to the position of the grid electrode of the battery piece.

[0014] Further, the support bottom plate is provided with an adsorption channel, and the test circuit board is provided with a plurality of adsorption holes avoiding the test circuit area, which are in communication with the adsorption channel.

[0015] Further, the second support plate is provided with a hollow gap for the light of the light source to pass through, and the fixed plate is arranged corresponding to the position of the hollow gap.

[0016] Further, the fixed plate is a light-transmitting material plate structure.

[0017] Compared with the prior art, the IV detection device for effectively preventing the battery piece from being cracked has the beneficial effects that high-density grid line conduction test can be realized, and the risk of battery cracking is reduced. Specifically, at the detection station, an elastic adsorption support platform is formed by the suction nozzles on the support rods in the support assembly, the battery piece is located on the elastic adsorption support platform, after the battery piece is moved to the position, the test module is lifted to a set height, at the set height, the battery piece is located above the test circuit board, then the probe pressing plate in the flexible pressing module above is matched to press and hold the battery piece downward, and the battery piece is pressed and held on the test circuit board through the compression of the suction nozzles, so that the grid line electrodes on the battery piece are effectively and reliably contacted with the electrical connection points on the test circuit board, on the one hand, the stability and reliability of the electrical contact conduction are improved, and on the other hand, the problem of hidden cracks caused by hard contact of the battery piece is effectively solved; in addition, the test circuit board is used as the electrical conduction piece for realizing electrical connection with the grid line electrodes of the battery piece in the test module, compared with the probe for realizing electrical conduction, the test circuit board can realize higher-density electrical connection point setting and meet the demand of high-density electrical conduction. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a side view structural schematic diagram of the embodiment of the utility model;

[0019] Figure 2 It is a structural schematic diagram of the support assembly in the embodiment of the utility model;

[0020] Figure 3 It is a structural schematic diagram of the flexible pressing module in the embodiment of the utility model;

[0021] Figure 4 It is another angle structural schematic diagram of the flexible pressing module in the embodiment of the utility model;

[0022] Figure 5 It is a structural schematic diagram of the flexible pressing module in the embodiment of the utility model;

[0023] Figure 6 It is a partial structural schematic diagram of the embodiment of the utility model;

[0024] Figure 7 It is a structural schematic diagram of the test module in the embodiment of the utility model;

[0025] Figure 8 It is a structural schematic diagram of the test module, the support assembly and the pressing needle cooperation in the embodiment of the utility model;

[0026] Numerals in the drawing represent:

[0027] 100-IV detection device for effectively preventing the battery piece from being cracked; 200-battery piece;

[0028] 1-support assembly, 11-support frame, 111-working area, 12-support rod, 13-suction nozzle;

[0029] 2-test module, 21-mounting seat, 22-supporting bottom plate, 221-avoidance groove, 222-suction channel, 23-test circuit board;

[0030] 3-first driving member, 31-first supporting plate;

[0031] 4-flexible pressing module, 41-second driving member, 42-second supporting plate, 421-hollow gap, 43-fixing plate, 44-pressing needle;

[0032] 5-light source, 6-XYR fine adjustment module.

DETAILED DESCRIPTION

[0033] Example one:

[0034] Please refer to Figures 1-8 The embodiment is an IV detection device 100 for effectively preventing battery sheet from being cracked, which comprises a support assembly 1, a test module 2 located below the support assembly 1, a first driving member 3 for driving the test module 2 to move up and down, a flexible pressing module 4 located above the test module 2, and a light source 5 located above the flexible pressing module 4.

[0035] The support assembly 1 comprises a support frame 11 and a plurality of support rods 12 arranged on the support frame 11 for adsorbing and supporting battery sheets 200. The support frame 11 is a rectangular frame structure and surrounds a hollow working area 111, the support rods 12 are arranged in the working area 111, and a plurality of suction nozzles 13 are arranged on the support rods 12 at intervals along the physical extension direction of the support rods 12.

[0036] In the embodiment, two groups of support rods 12 are arranged to adsorb and support two battery half sheets, respectively. When the two battery half sheets are placed on the support rods 12, the two battery half sheets are located in the working area 111 as a whole, and there is a certain distance between the two adjacent battery half sheets. One end of the support rod 12 is fixed on the body of the support frame 11 and the other end is cantilevered and protrudes towards the working area 111.

[0037] The support assembly 1 can be fixedly arranged between the test module 2 and the flexible pressing module 4; or can be arranged on a rotating unit and driven by a rotating driving member to move horizontally to carry the battery sheet 200 to move between different workstations; or can be arranged on a horizontal linear transfer mechanism to carry the battery sheet 200 to move between different workstations.

[0038] The movable end of the first driving member 3 is provided with a first support plate 31, and the first support plate 31 is provided with an XYR fine adjustment module 6 for position correction of the test module 2, and the test module 2 is arranged at the movable end of the XYR fine adjustment module 6. The XYR fine adjustment module 6 can realize accurate correction and adjustment of the battery sheet after visual positioning of the battery sheet by cooperating with the camera. The camera can be arranged beside the test module 2, and the horizontal movement of the driving support assembly 1 is used to switch the position between the photographing station and the detection station.

[0039] Therefore, the embodiment can further include a detection station and a photographing station, a transfer mechanism for position switching of the driving support assembly 1 between the detection station and the photographing station, the test module 2 and the flexible pressing module 4 are arranged at the detection station, the photographing station is provided with a camera, and the XYR fine adjustment module 6 adjusts the position of the test module 2 according to the position information of the battery sheet obtained by the camera.

[0040] The flexible pressing module 4 includes a second driving member 41, a second support plate 42 driven by the second driving member 41 to move up and down, a probe pressing plate (not shown in the figure) fixed on the second support plate 42 and opposite to the test module 2, the probe pressing plate includes a fixed plate 43 fixed on the second support plate 42 and a plurality of pressing needles 44 arranged on the lower surface of the fixed plate 43.

[0041] In the embodiment, the pressing needle 44 is different from the probe for realizing electrical conduction with the grid line electrode in the prior art, and the pressing needle 44 in the flexible pressing module 4 is only used to press the position close to the grid line electrode or corresponding to the grid line electrode on the battery sheet 200 downward, cooperate with the test module 2 and the support assembly 1, realize the flexible contact of the battery sheet 200 and the circuit board on the test module 2, and effectively avoid the hidden crack phenomenon caused by the upward and downward hard contact of the battery sheet.

[0042] The test module 2 includes a mounting support 21 fixed at the movable end of the XYR fine adjustment module 6, a support bottom plate 22 fixed on the mounting support 21, and a test circuit board 23 fixed on the support bottom plate 22. The test circuit board 23 is used to process high-density electrical contact points, solves the problem that high-density probes cannot be arranged in the planar area of the battery sheet, and meets the high-density electrical conduction IV test demand of the single-sided grid line electrode battery sheet.

[0043] The support bottom plate 22 and the test circuit board 23 are provided with a avoiding groove 221 avoiding the support rod 12, during the test, the support bottom plate 22 rises to a set height, at the set height, the support rod 12 is located in the avoiding groove 221, at the same time, the suction nozzle 13 adsorbs the battery piece 200 to a set height position above the test circuit board 2, the set height is within the height range that the suction nozzle 13 can be compressed; at this time, the battery piece 200 is substantially arranged on an elastic adsorption support platform formed by the suction nozzle 13, the battery piece 200 is pressed by the pressing needle 44, and the suction nozzle 13 is compressed, until the battery piece 200 is attached to the test circuit board 2, the grid line electrode on the lower surface of the battery piece 200 is in flexible and elastic contact with the test circuit board 2, and the hidden crack problem caused by hard contact is effectively avoided.

[0044] The second support plate 42 in the embodiment is provided with a hollow gap 421, the fixed plate 43 is arranged at the position corresponding to the hollow gap 421, and the fixed plate 43 is a light-transmitting material plate structure. The hollow gap 421 facilitates exposure of the area where the battery piece is located; by arranging the fixed plate 43 as a light-transmitting material, the light emitted by the light source 5 can pass through, and then irradiate on the battery piece.

[0045] The support bottom plate 22 is provided with an adsorption channel 222, and the test circuit board 23 is provided with a plurality of adsorption holes (not marked in the figure) avoiding the test circuit area, the adsorption holes are communicated with the adsorption channel 222, and are used for adsorbing the battery piece, assisting in positioning the battery piece 200, and improving the position stability of the battery piece 200 at the detection station.

[0046] The working process of the IV detection device for effectively preventing the battery piece from being hidden in the embodiment is as follows:

[0047] The support assembly 1 carries the battery piece 200 to move to the photographing station, the camera photographs the battery piece 200 on the support assembly 1 to obtain the position information of the battery piece; the moving mechanism drives the support assembly 1 carrying the battery piece 200 to move to the detection station, the XYR fine adjustment module 6 adjusts the test module 2 to a set position state according to the position information of the battery piece, and then the test module 2 rises to a set height, at this time, the battery piece 200 is adsorbed and seated on the suction nozzle 13, and is located at a set height position above the test circuit board 23 of the test module 2, the pressing needle 44 in the flexible pressing module 4 descends and presses the battery piece 200 downward, and the suction nozzle 13 is compressed, the battery piece 200 is attached to the surface of the test circuit board 23, the grid line electrode on the lower surface of the battery piece 200 is in contact with the corresponding electrical connection point on the test circuit board 23 to realize electrical conduction, and IV detection is realized.

[0048] The above merely describes some embodiments of the present application. For those skilled in the art, without departing from the inventive concept, some modifications and improvements can be made, and these all belong to the protection scope of the present application.

Claims

1. An IV detection device for effectively preventing microcracks in battery cells, characterized in that: It comprises a support assembly for supporting battery pieces, a test module located below the support assembly, a first driving member for driving the test module to move up and down, a probe pressing plate located above the test module, a second driving member for driving the probe pressing plate to move up and down, and a light source located above the probe pressing plate; The support assembly comprises a plurality of support rods and a plurality of suction nozzles arranged on the support rods; the test module comprises a support bottom plate and a test circuit board arranged on the support bottom plate, and the support bottom plate and the test circuit board are provided with avoiding grooves for avoiding the support rods; During detection, the support rods are located in the avoiding grooves, the plurality of suction nozzles collectively form an elastic suction support platform, the elastic suction support platform is higher than the surface of the test circuit board, the battery pieces are located on the elastic suction support platform, and the battery pieces are pressed downward by the probe pressing plate to compress the suction nozzles so as to realize the contact and electrical connection of the battery pieces and the test circuit board.

2. The IV testing device for preventing the battery piece from being cracked effectively according to claim 1, characterized in that: The movable end of the first driving member is provided with a first support plate, the first support plate is provided with an XYR fine adjustment module for position correction of the test module, and the test module is arranged at the movable end of the XYR fine adjustment module.

3. The IV testing device for preventing the battery piece from being cracked effectively according to claim 1, characterized in that: The support assembly is fixedly arranged at a position with a set height above the test module, or is subjected to horizontal rotary motion by a rotary driving member or a horizontal linear driving member, so as to carry the battery pieces to transfer positions between different stations.

4. The IV testing device for preventing the battery piece from being cracked effectively according to claim 1, characterized in that: The movable end of the second driving member is provided with a second support plate, the probe pressing plate comprises a fixed plate fixed on the second support plate and a plurality of pressing needles arranged in an array corresponding to the positions of the grid electrodes of the battery pieces on the lower surface of the fixed plate.

5. The IV testing device for preventing the battery piece from being cracked effectively according to claim 1, characterized in that: The support bottom plate is provided with a suction passage, and the test circuit board is provided with a plurality of suction holes avoiding the test circuit area, the suction holes being in communication with the suction passage.

6. The IV testing device for preventing the battery piece from being cracked effectively according to claim 4, characterized in that: The second support plate is provided with a hollow gap for the light of the light source to pass through, and the fixed plate is arranged corresponding to the position of the hollow gap.

7. The IV testing device for preventing the battery piece from being cracked effectively according to claim 4 or 6, characterized in that: The fixed plate is a light-transmitting material plate structure.

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