Battery piece testing system

Abstract

The utility model discloses a battery piece test system comprising an adsorption assembly and a test assembly, the adsorption assembly is used for adsorbing a first surface of a battery piece, the test assembly comprises a test board, the test board comprises an adsorption structure and a plurality of conductive projection groups arranged at intervals, the conductive projection groups comprise a plurality of conductive projections arranged at intervals, and the adsorption structure is used for adsorbing the first surface of the battery piece. The conductive protrusions are used for making contact with test points on the second face of the battery piece, the adsorption structure is used for adsorbing the second face of the battery piece, an adsorption assembly is located above the test assembly, and the battery piece adsorbed by the adsorption assembly is located between the transparent adsorption assembly and the test assembly. In the embodiment of the utility model, through the arrangement of the adsorption structure, the conductive bulge can be in close contact with the test point, so that the test accuracy can be ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to photovoltaic technology field especially relates to a cell test system. BACKGROUND

[0002] When the cell is tested by IV (current voltage), the testing device is needed to test.

[0003] In the related art, the testing device includes a lower test plate and an upper pressing tool, the lower test plate can adopt a plurality of test probe rows, the upper pressing tool includes an upper pressing probe row, during testing, the lower test plate contacts the pads or grid lines on one surface of the cell, and the upper pressing probe row is pressed on the other surface of the cell, the contact stability is poor, and the testing accuracy is easily affected. UTILITY MODEL CONTENT

[0004] The utility model provides a cell test system, aims at at least solve the problem that the prior art contact stability is poor, and easily affect testing accuracy.

[0005] The utility model embodiment provides a cell test system, including:

[0006] The adsorption assembly is used for adsorbing the first surface of the cell;

[0007] The test assembly includes a test plate, the test plate includes an adsorption structure and a plurality of interval arrangement conductive convex groups, the conductive convex group includes a plurality of interval arrangement conductive convexes, the conductive convex is used for contacting the test point on the second surface of the cell, and the adsorption structure is used for adsorbing the second surface of the cell;

[0008] One the adsorption assembly is located above the test assembly, and the cell adsorbed by it is located between the adsorption assembly and the test assembly.

[0009] Optionally, the adsorption assembly is at least partially transparent structure.

[0010] Optionally, the adsorption structure includes a plurality of interval arrangement adsorption hole groups, and the adsorption hole group includes a plurality of interval arrangement adsorption holes.

[0011] The arrangement direction of a plurality of the adsorption hole groups is parallel to the arrangement direction of a plurality of the conductive convex groups, and the arrangement direction of a plurality of the adsorption holes in one adsorption hole group is parallel to the arrangement direction of a plurality of the conductive convexes in one conductive convex group.

[0012] Optionally, along the arrangement direction of a plurality of the conductive convex groups, one adsorption hole group is arranged between any two adjacent conductive convex groups.

[0013] Optionally, along the arrangement direction of the plurality of conductive bump groups, two sides of any of the conductive bump groups are respectively provided with two groups of adsorption holes.

[0014] Optionally, along the arrangement direction of the plurality of conductive bump groups, the distance between the conductive bump group and the adjacent group of adsorption holes is greater than or equal to 1.5 mm and less than or equal to 2.5 mm.

[0015] Optionally, the test assembly further comprises an adsorption base plate, and the test plate is arranged on the adsorption base plate.

[0016] The adsorption base plate is provided with an adsorption channel, and the adsorption holes are communicated with the adsorption channel.

[0017] Optionally, the adsorption assembly comprises a plurality of adsorption subassemblies, and each adsorption subassembly comprises a support and a plurality of suction nozzles arranged on the support.

[0018] Optionally, each adsorption assembly has a test position located above the test assembly; and the battery sheet testing system further comprises a rotating table connected with the adsorption assembly, and the rotating table is used to drive the adsorption assembly to rotate so as to rotate the adsorption assembly to the test position.

[0019] Optionally, the battery sheet testing system further comprises an upper feeding transmission assembly and a lower feeding transmission assembly, and the upper feeding transmission assembly and the lower feeding transmission assembly are used to transmit the battery sheet.

[0020] Each adsorption assembly further has an upper feeding position located above the upper feeding transmission assembly and a lower feeding position located above the lower feeding transmission assembly.

[0021] In the embodiment of the utility model, during the battery sheet testing, the conductive bump in the test plate contacts the test point on the second surface of the battery sheet, and the adsorption structure in the test plate adsorbs the second surface of the battery sheet, through the setting of the adsorption structure, the conductive bump can be in close contact with the test point, the whole surface adsorption contact with the battery sheet can be formed, and the first surface is adsorbed by the adsorption assembly, which cooperates with the test adsorption of the second surface, avoids the instability of the battery sheet testing caused by the pressing of the upper pressing tool, makes the battery sheet more stable during testing, and improves the accuracy of IV detection.

[0022] The above description is only a summary of the technical scheme of the present application, in order to more clearly understand the technical means of the present application, the specific embodiments of the present application can be implemented according to the content of the specification, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described below. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 A perspective structural schematic view of a battery piece testing system provided by an embodiment of the present application is shown in the figure.

[0024] Figure 2 A partial structural schematic view of the battery piece testing system provided by the embodiment of the present application is shown in the figure.

[0025] Figure 3 A perspective structural schematic view of a testing assembly in the battery piece testing system provided by the embodiment of the present application is shown in the figure.

[0026] Figure 4 A sectional view schematic view of the testing assembly in the battery piece testing system provided by the embodiment of the present application is shown in the figure.

[0027] Figure 5 A Figure 4 magnified schematic view of position A in the figure.

[0028] Figure 6 A structural schematic view of a testing plate in the battery piece testing system provided by the embodiment of the present application is shown in the figure. Figure 1 ;

[0029] Figure 7 A structural schematic view of the testing plate in the battery piece testing system provided by the embodiment of the present application is shown in the figure. Figure 2 ;

[0030] Figure 8 A structural schematic view of an adsorption base plate in the battery piece testing system provided by the embodiment of the present application is shown in the figure.

[0031] REFERENCE SIGNS:

[0032] 1-testing assembly, 11-testing plate, 111-conductive protrusion group, 112-adsorption hole group, 1121-adsorption hole, 12-adsorption base plate, 121-adsorption channel, 122-adsorption interface, 123-mounting hole, 124-first positioning hole, 2-adsorption assembly, 21-adsorption accessory, 3-rotary table, 4-connecting frame, 5-moving table, 6-feeding transmission assembly, 7-discharging transmission assembly, 8-battery piece. DETAILED DESCRIPTION

[0033] Exemplary embodiments of the present application will be described in greater detail below with reference to the accompanying drawings. Although exemplary embodiments of the present application are shown in the drawings, it is understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present application can be more thoroughly understood, and so that the scope of the present application can be conveyed to those skilled in the art.

[0034] The battery piece testing system is used for testing the performance of a single battery piece 8, and is particularly used for IV (current voltage) and EL (Electro Luminescence) testing of the single battery piece 8. The IV testing is mainly used for testing the current-voltage characteristic curve of the battery piece 8 under different light and temperature conditions, so as to evaluate the conversion efficiency, power output and other key parameters of the battery. During the IV testing, light can be irradiated to the first surface of the battery piece 8 through a light source located above the testing assembly 1, so as to simulate sunlight and test the performance of the battery piece 8 when the battery piece 8 is lighted. During the EL testing, a forward bias voltage can be applied to the battery piece 8, so that the battery piece 8 emits photons, and then the battery piece 8 is photographed through an EL shooting device located above the testing assembly 1, so as to obtain an EL image.

[0035] In the related art, during the testing process, an upper pressing tool (an upper pressing probe array) and a lower testing plate are usually used to jointly fix the battery piece for testing. The pressing action precision and pressing force are required to be high during the whole process, and it is difficult to avoid unstable pressing.

[0036] With reference to Figures 1 to 3 The battery piece testing system includes an adsorption assembly 2 and a testing assembly 1. The adsorption assembly 2 is used for adsorbing the first surface of the battery piece 8. The testing assembly 1 includes a testing plate 11. The testing plate 11 includes an adsorption structure and a plurality of spaced conductive protrusions 111. The conductive protrusion 111 includes a plurality of spaced conductive protrusions. The conductive protrusion is used for contacting a test point on the second surface of the battery piece 8. The adsorption structure is used for adsorbing the second surface of the battery piece 8. The adsorption assembly 2 is located above the testing assembly 1, and the battery piece 8 adsorbed by the adsorption assembly 2 is located between the adsorption assembly 2 and the testing assembly 1.

[0037] The battery piece 8 can be a main grid-free battery piece. The battery piece 8 has a plurality of fine grids. The test point can be a pad connected with the fine grid. At this time, the plurality of conductive protrusions correspond to the plurality of pads one by one. The battery piece 8 can also be a back contact battery piece. The positive and negative electrodes of the back contact battery piece are located on the back surface of the back contact battery piece. The first surface of the battery piece 8 can be the front surface of the battery piece 8. The second surface of the battery piece 8 can be the back surface of the battery piece 8.

[0038] The conductive protrusions protrude from the upper surface of the test plate 11. The test plate 11 has a vacuum suction function and can suction the battery piece 8 to the upper surface of the test plate 11. The number of suction assemblies 2 can be one or multiple. Preferably, the number of suction assemblies 2 is multiple, and one suction assembly 2 is located above the test assembly 1, and the battery piece 8 suctioned by the suction assembly 2 is located between the suction assembly 2 and the test assembly 1.

[0039] For a single suction assembly 2, the suction assembly 2 has a test position above the test assembly 1, which can refer to the position shown in FIG. 2W2. In the test position, the suction assembly 2 is located above the test assembly 1, and the battery piece 8 suctioned by the suction assembly 2 is located between the suction assembly 2 and the test assembly 1. The test assembly 1 is movable, and when the suction assembly 2 is in the test position, the test assembly 1 as a whole can move towards the battery piece 8 suctioned by the suction assembly 2. When the suction assembly 2 is in the test position, the test assembly 1 as a whole can also move away from the suction assembly 2. Figure 1

[0040] During the test of the battery piece 8, one suction assembly 2 suctions the battery piece 8 and is in the test position, and the test assembly 1 moves towards the battery piece 8 suctioned by the suction assembly 2, so that the suction structure in the test plate 11 suctions the second surface of the battery piece 8, and the conductive protrusions in the test plate 11 contact the test points on the second surface of the battery piece 8. After the conductive protrusions contact the test points on the second surface of the battery piece 8, the conductive protrusions are electrically connected to the test points on the battery piece 8 to test the performance of the battery piece 8. It should be noted that in the test position, according to the test situation, the suction assembly 2 can continuously suction the first surface of the battery piece 8, or can not suction the battery piece 8 in time when the test plate 11 suctions the battery piece 8.

[0041] During the test of the battery piece 8, the conductive protrusions in the test plate 11 contact the test points on the second surface of the battery piece 8, and the suction structure in the test plate 11 suctions the second surface of the battery piece 8. Through the arrangement of the suction structure, the conductive protrusions can be in close contact with the test points, and the whole surface of the battery piece can be in suction contact. In addition, the first surface is suctioned by the suction assembly, and the second surface is tested and suctioned, so that the battery piece is more stable during the test, and the instability of the battery piece caused by the pressing and pressing of the probe array is avoided. Therefore, the detection method of the present application can better improve the stability and accuracy of the test. When the test plate 11 suctions the battery piece, the positions of the conductive protrusions on the test plate 11 and the test points on the battery piece 8 can be aligned, and it is not necessary to consider whether the pressing action of the pressing tool and the pressing tightness are appropriate. The action is simple, the accuracy requirement is low, and the test efficiency is improved.

[0042] ​In some embodiments, the adsorption assembly 2 can be an adsorption clamp, or an adsorption plate, or an adsorption arm, etc., so as to better adsorb and fix the battery piece and transfer the battery piece. In some embodiments, the adsorption assembly 2 is at least partially transparent. The adsorption assembly 2 is movable, and the adsorption assembly 2 has other positions in addition to the test position. The adsorption assembly 2 can be moved from the other positions to the test position, or moved from the test position to the other positions. In addition, the adsorption assembly 2 in the test position can be a partially transparent or fully transparent structure. Thus, by the transparency of the adsorption assembly 2, the light transmittance is improved, so that the EL test will not affect the shooting of the EL shooting device above the test plate 11, that is, will not affect the EL imaging, and thus the accuracy of the EL test can be ensured.

[0043] In some embodiments, referring to Figure 6 and Figure 7 , the adsorption structure includes a plurality of adsorption hole groups 112 arranged at intervals, and each adsorption hole group 112 includes a plurality of adsorption holes 1121 arranged at intervals. The arrangement direction of the plurality of adsorption hole groups 112 is parallel to the arrangement direction of the plurality of conductive protrusion groups 111, and the arrangement direction of the plurality of adsorption holes 1121 in one adsorption hole group 112 is parallel to the arrangement direction of the plurality of conductive protrusions in one conductive protrusion group 111.

[0044] In some embodiments, referring to Figure 6 and Figure 7 , the arrangement direction of the plurality of conductive protrusion groups 111 can be the direction indicated by the B arrow, and the arrangement direction of the plurality of conductive protrusions in one conductive protrusion group 111 can be the direction indicated by the C arrow. Figure 6

[0045] In some embodiments, referring to Figure 6 , along the arrangement direction of the plurality of conductive protrusion groups 111, one adsorption hole group 112 is arranged between any two adjacent conductive protrusion groups 111. In this embodiment, the number of the conductive protrusion groups 111 is N1, and the number of the adsorption hole groups 112 is M1, and M1=N1-1. In this embodiment, the test plate 11 does not need to be designed to have a avoiding slot to avoid the lower adsorption tool, and the test plate 11 can adsorb the battery piece 8 on the whole surface, and the adsorption effect of the test plate 11 on the battery piece 8 is good.

[0046] ​The diameter of the adsorption hole 1121 can be 3 mm. Along the arrangement direction of the plurality of conductive protrusion groups 111, the distance between the adsorption hole group 112 and any adjacent conductive protrusion group 111 can be 5 mm. The number of adsorption holes 1121 in an adsorption hole group 112 can be set according to actual needs, for example, it can be set to 16. In this embodiment, the diameter of the adsorption hole 1121 is large, the adsorption area of a single adsorption hole 1121 is large, and the adsorption holes 1121 are arranged sparsely, which is easy to process and arrange.

[0047] In some embodiments, referring to Figure 7 , along the arrangement direction of the plurality of conductive protrusion groups 111, two adsorption hole groups 112 are arranged on the two sides of any conductive protrusion group 111. In this embodiment, the number of conductive protrusion groups 111 is N2, and the number of adsorption hole groups 112 is M2, then M2 = 2N2. In this embodiment, the test plate 11 does not need to be designed to avoid the avoidance groove of the lower adsorption tool, and the test plate 11 can adsorb the battery piece 8 on the whole surface, and the adsorption effect of the test plate 11 on the battery piece 8 is good.

[0048] In some embodiments, along the arrangement direction of the plurality of conductive protrusion groups 111, the distance between the conductive protrusion group 111 and the adjacent adsorption hole group 112 is greater than or equal to 1.5 mm and less than or equal to 2.5 mm.

[0049] In some embodiments, along the arrangement direction of the plurality of conductive protrusion groups 111, the distance between the conductive protrusion group 111 and the adjacent adsorption hole group 112 is greater than or equal to 1.5 mm and less than or equal to 2.5 mm.

[0050] It should be noted that the arrangement mode of the adsorption hole 1121 is not limited to Figure 6 and Figure 7 the arrangement modes shown in the figures, and can be other arrangement modes that facilitate adsorption. Along the arrangement direction of the plurality of conductive protrusion groups 111, the distance between the conductive protrusion group 111 and the adjacent adsorption hole group 112 can be adjusted according to actual needs.

[0051] In some embodiments, referring to Figures 3 to 5 , Figure 8 , the test assembly 1 further comprises an adsorption bottom plate 12, and the test plate 11 is arranged on the adsorption bottom plate 12; the adsorption bottom plate 12 is provided with an adsorption passage 121, and the adsorption hole 1121 communicates with the adsorption passage 121.

[0052] The test plate 11 can be bonded to the adsorption base plate 12 or connected to the adsorption base plate 12 by bolts. When the test plate 11 is connected to the adsorption base plate 12, the sealing performance of the contact surface between the test plate 11 and the adsorption base plate 12 needs to be ensured. The adsorption base plate 12 is provided with a first positioning hole 124, and the test plate 11 is provided with a second positioning hole. When the test plate 11 is connected to the adsorption base plate 12, the position of the first positioning hole 124 corresponds to the position of the second positioning hole, so as to realize the positioning of the test plate 11 and the adsorption base plate 12.

[0053] The adsorption channel 121 can include a plurality of first adsorption channels arranged at intervals, and the positions of the plurality of first adsorption channels correspond one by one to the positions of the plurality of adsorption hole groups 112. The adsorption channel 121 can also include a second adsorption channel communicating with the plurality of first adsorption channels. The second adsorption channel intersects with the first adsorption channel, and the number of the second adsorption channel is preferably two.

[0054] The test plate 11 with the adsorption hole 1121 and the adsorption base plate 12 with the adsorption channel 121 are separately processed and then connected together. The adsorption channel 121 is arranged on the adsorption base plate 12, and there is no need to arrange the adsorption channel 121 on the test plate 11, which is beneficial to simplify the structure of the test plate 11 and reduce the processing complexity of the test plate 11.

[0055] The adsorption base plate 12 is also provided with an adsorption interface 122 communicating with the second adsorption channel. The adsorption interface 122 is used for installing a vacuum adsorption connector, and the number of the adsorption interface 122 can be four. The battery piece test system also includes a vacuum generator. The vacuum generator communicates with the vacuum adsorption connector through a vacuum pipeline. The vacuum generator is used for providing negative pressure, so that the battery piece 8 is adsorbed on the test plate 11.

[0056] The vacuum generator can be provided with a damage valve. The vacuum generator can be reversely blown. When the vacuum generator is reversely blown, the vacuum at the adsorption hole 1121 is broken, so that the test plate 11 is separated from the battery piece 8. A vacuum pressure reducing valve can be arranged on the vacuum pipeline to adjust the vacuum pressure. A plurality of adsorption holes 1121 are provided with negative pressure by the same vacuum generator. In order to avoid that air leakage at part of the adsorption holes 1121 affects the adsorption of other adsorption holes 1121, a vacuum logic valve can be arranged. The vacuum logic valve can be arranged at each adsorption hole 1121.

[0057] In some embodiments, referring to Figure 2 The adsorption assembly 2 includes a plurality of adsorption members 21. The adsorption member 21 includes a support and a plurality of suction nozzles arranged on the support. The support and the suction nozzle can also be at least partially transparent structures.

[0058] In some embodiments, to improve the light transmittance and prevent image shadow during EL testing, the part of the adsorption assembly 2 in contact with the battery sheet 8 can be designed as a transparent structure, wherein the material of the bracket is a transparent material with a light transmittance greater than or equal to 90%, and the transparent material can be quartz, glass, organic polymer material, etc. The adsorption assembly 2 preferably includes four suction members 21. The suction nozzle is used for vacuum adsorption of the battery sheet 8. The suction nozzle adsorbs the battery sheet 8 in a soft contact adsorption manner, which can avoid damage to the battery sheet 8.

[0059] In some embodiments, referring to Figure 1 and Figure 2 , the battery sheet testing system further includes a rotating table 3 connected with the adsorption assembly 2, and the rotating table 3 is used to drive the adsorption assembly 2 to rotate so as to rotate the adsorption assembly 2 to a testing position.

[0060] The adsorption assembly 2 can be connected with the rotating table 3 through a connecting frame 4, and the connecting frame 4 can be a transparent structure or a non-transparent structure. The number of the adsorption assembly 2 connected with the rotating table 3 can be one or multiple. When the adsorption assembly 2 adsorbs the battery sheet 8, the orthographic projection of the battery sheet 8 along the thickness direction of the battery sheet 8 does not overlap with the orthographic projection of the connecting frame 4. The rotating table 3 is arranged to enable the adsorption assembly 2 to rotate around the axis of the rotating table 3, which can enable faster position switching of the adsorption assembly 2.

[0061] In some embodiments, referring to Figure 1 , the battery sheet testing system further includes an upper feeding transmission assembly 6 and a lower feeding transmission assembly 7, and the upper feeding transmission assembly 6 and the lower feeding transmission assembly 7 are both used to transmit the battery sheet 8; each adsorption assembly 2 further has an upper feeding position above the upper feeding transmission assembly 6 and a lower feeding position above the lower feeding transmission assembly 7.

[0062] The upper feeding position can refer to W1 shown in Figure 1 , and the lower feeding position can refer to W3 shown in Figure 1 . The upper feeding position and the lower feeding position are close to the rotating table 3. The upper feeding transmission assembly 6 and the lower feeding transmission assembly 7 can be a transmission belt. The upper feeding transmission assembly 6 is used to transmit the battery sheet 8 to be tested, and the lower feeding transmission assembly 7 is used to transmit the battery sheet after testing.

[0063] After the adsorption assembly 2 adsorbs the battery piece 8 transmitted by the feeding transmission assembly 6 in the feeding position, the rotating table 3 drives the adsorption assembly 2 to rotate from the feeding position to the testing position, and the battery piece 8 is tested in the testing position. After the testing of the battery piece 8 is completed, the rotating table 3 drives the adsorption assembly 2 to rotate from the testing position to the discharging position. After the adsorption assembly 2 rotates to the discharging position, the adsorption assembly 2 stops adsorbing the battery piece 8, and the battery piece 8 falls on the discharging transmission assembly 7 and is transmitted by the discharging transmission assembly 7. In the embodiment, through the cooperation of the feeding transmission assembly 6, the discharging transmission assembly 7, the adsorption assembly 2 and the rotating table 3, the automatic feeding, position switching and discharging in the battery piece 8 testing process can be realized.

[0064] In some embodiments, referring to Figure 1 and Figure 2 The number of adsorption assemblies 2 is multiple, and the multiple adsorption assemblies 2 are arranged along the circumference of the rotating table 3.

[0065] As an example, each adsorption assembly 2 also has a waiting position opposite to the testing position. The number of adsorption assemblies 2 is four, and the four adsorption assemblies 2 are connected with the same rotating table 3 and are uniformly distributed along the circumference of the rotating table 3. During the testing of the battery piece 8, the four adsorption assemblies 2 can be located at the feeding position, the testing position, the discharging position and the waiting position respectively, that is, one of the four adsorption assemblies 2 is located at the testing position.

[0066] As another example, the number of adsorption assemblies 2 is three, and the three adsorption assemblies 2 are connected with the same rotating table 3. During the testing of the battery piece 8, the three adsorption assemblies 2 can be located at the feeding position, the testing position and the discharging position respectively. In this embodiment, the number of adsorption assemblies 2 is multiple, and the rotating table 3 drives the multiple adsorption assemblies 2 to rotate simultaneously. The multiple adsorption assemblies 2 can complete different position switching simultaneously under the driving of the rotating table 3, so as to improve the overall testing efficiency.

[0067] In some embodiments, referring to Figure 1 and Figure 2 The battery piece testing system further comprises a movable table 5 and a driving assembly. The testing assembly 1 is arranged on the movable table 5. The driving assembly is used to drive the movable table 5 to move along the thickness direction of the testing assembly 1, so as to drive the testing assembly 1 to move towards or away from the adsorption assembly 2.

[0068] The adsorption base plate 12 is connected with the movable table 5. The adsorption base plate 12 is connected with the movable table 5 through bolts. The adsorption base plate 12 is provided with mounting holes 123 for the bolts. The driving assembly comprises a first driving motor. The first driving motor is used to drive the movable table 5 to move along the thickness direction of the testing assembly 1, that is, to drive the movable table 5 to move up and down. When the adsorption assembly 2 adsorbs the battery piece 8 and is located at the testing position, the driving assembly is operated to drive the movable table 5 to move upward with the testing assembly 1, so that the adsorption structure in the testing plate 11 adsorbs the second surface of the battery piece, and the conductive protrusions in the testing plate 11 are in contact with the test points on the second surface of the battery piece 8.

[0069] In some embodiments, the battery piece testing system further comprises a controller electrically connected with the driving assembly. The controller is used to control the driving assembly to drive the movable table 5 to move along the width direction and the length direction of the testing assembly 1 when the position of the battery piece 8 to be tested adsorbed by the adsorption assembly 2 deviates.

[0070] The driving assembly comprises a second driving motor and a third driving motor. The second driving motor is used to drive the movable table 5 to move along the width direction of the testing assembly 1. The third driving motor is used to drive the movable table 5 to move along the length direction of the testing assembly 1. The battery piece testing system further comprises a visual acquisition device electrically connected with the controller. The visual acquisition device is used to acquire the positioning information of the battery piece 8 to be tested adsorbed by the adsorption assembly 2. The visual acquisition device can be a camera. The positioning information of the battery piece 8 to be tested comprises at least one mark. The at least one mark can be used to indicate the center or the edge line of the battery piece 8 to be tested. The visual acquisition device can be arranged below the feeding transmission assembly 6. At this time, the visual acquisition device is used to acquire the positioning information of the battery piece 8 to be tested adsorbed by the adsorption assembly 2 at the feeding position.

[0071] The controller is used to calculate the position information of the battery piece 8 to be tested after analyzing the positioning information of the battery piece 8 to be tested. If the position information of the battery piece 8 to be tested does not match the preset position information, that is, the position of the battery piece 8 to be tested deviates, the controller is used to control the driving assembly to drive the movable table 5 to move along the width direction and the length direction of the testing assembly 1 to adjust the horizontal position of the testing assembly 1, so that the conductive protrusions on the testing plate 11 are aligned with the positions of the test points on the battery piece 8 when the testing assembly 1 moves upward subsequently.

[0072] After the testing of the battery piece 8 is completed, the rotating table 3 drives the adsorption assembly 2 to rotate from the testing position to the discharging position. After the adsorption assembly 2 rotates to the discharging position, the adsorption assembly 2 stops adsorbing the battery piece 8. The battery piece 8 falls on the discharging transmission assembly 7, and the discharging transmission assembly 7 transmits the battery piece 8 tested

[0073] The working process of the above battery piece testing system can be as follows:

[0074] The first step is that the adsorption assembly 2 adsorbs the battery sheet 8 at the feeding position, the vision acquisition component acquires the positioning information of the battery sheet 8 adsorbed by the adsorption assembly 2, the adsorption assembly 2 and the battery sheet 8 adsorbed thereby are rotated from the feeding position to the testing position, in the rotating process, the controller calculates the position information of the battery sheet 8 according to the positioning information of the battery sheet 8 after analysis, if it does not match the preset position information, the driving assembly is controlled to drive the movable table 5 to move along the width direction and the length direction of the testing assembly 1, so as to adjust the horizontal position of the testing assembly 1;

[0075] The second step is that after the adsorption assembly 2 is rotated to the testing position, the movable table 5 drives the testing assembly 1 to move upwards, in the upward moving process of the testing assembly 1, the vacuum generator operates, when the testing plate 11 contacts the battery sheet 8, the testing plate 11 completes the adsorption of the battery sheet 8;

[0076] The third step is to perform IV or EL test on the battery sheet 8;

[0077] The fourth step is that after the test of the battery sheet 8 is completed, the vacuum at the adsorption hole 1121 is broken, and at the same time, the movable table 5 drives the testing assembly 1 to move downwards;

[0078] The fifth step is that the adsorption assembly 2 is rotated from the testing position to the discharging position, and the test action of the single battery sheet 8 is completed.

[0079] It should be noted that in the above process, at the testing position, the adsorption assembly 2 continuously adsorbs the first surface of the battery sheet 8. When the testing plate 11 moves upwards to the position and adsorbs the second surface of the battery sheet 8, the adsorption stroke is small, and when the testing plate 11 adsorbs the battery sheet 8 downwards, the suction nozzle in the transparent adsorption assembly 2 will be elongated downwards.

[0080] In the working process of the battery sheet testing system, the time for the adsorption assembly 2 and the battery sheet 8 adsorbed thereby to rotate to the testing position and the time for the testing assembly 1 to adjust the horizontal position are parallel time, the time for the first battery sheet 8 to rotate to the output position and the time for the next battery sheet 8 to rotate to the testing position are parallel time, therefore, in the above actions, the time for the adsorption assembly 2 and the battery sheet 8 adsorbed thereby to rotate from one position to the next position is calculated only once in the first step and the fifth step, the time is the rotating time of the rotating table 3 by 90°, which is about 0.14s; in the second step, the upward moving of the testing plate 11 is parallel to the vacuum breaking time, which is about 0.1s-0.2s; in the third step, the IV / EL detection time is about 0.2s-0.3s; in the fourth step, the downward moving of the testing plate 11 is parallel to the vacuum breaking time, which is about 0.1s-0.2s.

[0081] In summary, the CT (Cycle Time) of the battery piece testing system is about 0.54s-0.84s, which is superior to the CT of the existing testing machine and can match the CT of the existing screen printing line. It should be noted that in the analysis of the CT of the battery piece testing system, the CT of each process varies according to the speed of the stroke and different equipment, but compared with the same conditions, the CT of the battery piece testing system is superior to the CT of the existing testing machine.

[0082] It should be noted that in this document, the terms "comprise", "comprise", or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such a process, method, article or device. Without more limitations, the element defined by the statement "comprises a" does not exclude the presence of another identical element in the process, method, article or device that includes the element.

[0083] The embodiments of the utility model are described above in combination with the drawings, but the utility model is not limited to the specific embodiments described above, and the specific embodiments described above are only illustrative but not restrictive, and those skilled in the art can make many forms under the inspiration of the utility model without departing from the purpose of the utility model and the scope protected by the claims.

Claims

1. A battery cell testing system, characterized in that, include: Adsorption assembly for adsorbing the first side of the battery cell; The test assembly includes a test plate, which includes an adsorption structure and a plurality of spaced conductive protrusions. The conductive protrusions are spaced conductive protrusions that are used to contact test points on the second surface of the battery cell. The adsorption structure is used to adsorb the second surface of the battery cell. The adsorption component is located above the test component, and the adsorbed battery cell is located between the adsorption component and the test component.

2. The battery cell testing system according to claim 1, characterized in that, The adsorption component is at least partially transparent.

3. The battery cell testing system according to claim 1, characterized in that, The adsorption structure includes multiple adsorption pore groups arranged at intervals, and the adsorption pore group includes multiple adsorption pores arranged at intervals. The arrangement direction of the plurality of adsorption pore groups is parallel to the arrangement direction of the plurality of conductive protrusion groups, and the arrangement direction of the plurality of adsorption pores in one adsorption pore group is parallel to the arrangement direction of the plurality of conductive protrusions in one conductive protrusion group.

4. The battery cell testing system according to claim 3, characterized in that, Along the arrangement direction of the plurality of conductive protrusion groups, an adsorption hole group is provided between any two adjacent conductive protrusion groups.

5. The cell testing system according to claim 3, characterized in that, Along the arrangement direction of the plurality of conductive protrusion groups, two adsorption hole groups are respectively provided on both sides of any one of the conductive protrusion groups.

6. The cell testing system according to claim 5, characterized in that, Along the arrangement direction of the plurality of conductive protrusion groups, the distance between the conductive protrusion group and the adjacent adsorption hole group is greater than or equal to 1.5 mm and less than or equal to 2.5 mm.

7. The cell testing system according to any one of claims 3 to 6, characterized in that, The test assembly also includes an adsorption base plate, and the test plate is disposed on the adsorption base plate; The adsorption base plate has an adsorption channel, and the adsorption hole is connected to the adsorption channel.

8. The cell testing system according to any one of claims 1 to 6, characterized in that, The adsorption assembly includes multiple adsorption elements, each of which includes a support and multiple suction nozzles disposed on the support.

9. The cell testing system according to any one of claims 1 to 6, characterized in that, Each of the adsorption components has a test position located above the test component; The battery cell testing system also includes a rotary table, which is connected to the adsorption component. The rotary table is used to drive the adsorption component to rotate so that the adsorption component rotates to the testing position.

10. The battery cell testing system according to claim 9, characterized in that, The battery cell testing system also includes a loading and unloading conveyor component and an unloading conveyor component, both of which are used to transport the battery cells. Each of the adsorption components also has a feeding position located above the feeding conveying component and a discharging position located above the discharging conveying component.

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