CN216311723U - Test auxiliary fixtures and test system - Google Patents

Abstract

The utility model discloses a test auxiliary tool and a test system, relates to the technical field of solar cell testing, and simplifies the cell conveying and testing steps and reduces the size of the test auxiliary tool under the condition that a test device simultaneously realizes the conveying and test clamping of a cell. The auxiliary testing tool is applied to double-sided battery pieces. The test auxiliary tool comprises two conveying clamping units which are distributed up and down oppositely. Each transfer gripping unit includes: two live rollers that set up along first direction interval, the transmission line on the live roller is established to the interval cover, and each transmission line all corresponds with a main grid line on the double-sided battery piece. A plurality of conductive clamping pieces are arranged on each conveying line at equal intervals, and the conductive clamping pieces on each conveying line are all controllably abutted to the main grid line corresponding to the conveying line. The test auxiliary tool disclosed by the utility model is applied to a test system.

Description

Test auxiliary fixtures and test system

Technical Field

The utility model relates to the technical field of solar cell testing, in particular to a testing auxiliary tool and a testing system.

Background

The testing and sorting of the conversion efficiency of the solar cell is an important link of the production process and quality control of the finished solar cell.

At present, the test for the double-sided battery piece comprises the following steps: firstly, testing one surface of the cell is completed, and then manually testing the other surface of the cell. At the moment, the test of the double-sided battery piece has the defects of complex and complicated test process, low test efficiency and high cost. In order to solve the problems, the industry development trend is to test the two sides of the battery piece by receiving light simultaneously. When the two sides of the cell are subjected to light receiving test at the same time, sunlight simulation light sources (called as bilateral light sources for short) can be arranged above and below the cell, and then the cell is conveyed to a test area of the bilateral light sources by virtue of a transmission device and then is clamped by a test fixture for testing.

The existing testing device for testing the double faces of the battery piece has the problems of complex transmission steps, large equipment size and the like due to the fact that the transmission device and the testing clamp are arranged independently.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a test auxiliary tool and a test system, which can simplify the steps of conveying and testing a battery piece and reduce the size of the test auxiliary tool under the condition that a test device simultaneously realizes conveying and test clamping of the battery piece.

In a first aspect, the utility model provides a test auxiliary tool, which is applied to a double-sided battery piece. The test auxiliary tool comprises two conveying clamping units which are distributed up and down oppositely. Each transfer gripping unit includes: two live rollers that set up along first direction interval, the transmission line on the live roller is established to the interval cover, and each transmission line all corresponds with a main grid line on the double-sided battery piece. A plurality of conductive clamping pieces are arranged on each conveying line at equal intervals, and the conductive clamping pieces on each conveying line are all controllably abutted to the main grid line corresponding to the conveying line.

Compared with the prior art, when the auxiliary testing tool provided by the utility model is applied to the test of the double-sided battery piece, the two rotating rollers included in each conveying clamping unit can be controlled to rotate at the same speed and in the same rotating direction, the main grid line on the front surface of the double-sided battery piece is contacted with the conductive clamping piece on the conveying line included in one conveying clamping unit, and the main grid line on the back surface of the double-sided battery piece is contacted with the conductive clamping piece on the conveying line included in the other conveying clamping unit. When the transmission line drives the conductive clamping piece to move, the conductive clamping piece pushes the double-sided battery piece to move between the two transmission clamping units. After the double-sided battery piece moves to a preset position (the preset position can be a region irradiated by a bilateral light source), a probe included in the tester can be electrically connected with the conductive clamping piece, so that the double-sided battery piece can be tested. And after the test is finished, continuously utilizing the conveying line rotating along with the rotating roller and the conductive clamping piece moving along with the conveying line to move the double-sided battery piece out of the preset position.

From the application, the test auxiliary tool provided by the utility model has the functions of conveying the double-sided battery piece and assisting in testing the double-sided battery piece. Based on this, in the case of shortening the conveying route of the double-sided battery piece during the test, the conveying and testing steps of the double-sided battery piece can be simplified. Meanwhile, the size of the test auxiliary tool can be reduced.

As a possible implementation manner, the test auxiliary tool further comprises a pressing unit, and at least one conveying clamping unit is correspondingly provided with one pressing unit. The pressing units comprise bearing parts and conductive pressing pieces arranged on the bearing parts. The conductive pressing piece can be controlled to abut against or separate from the conductive clamping piece.

Under the condition of adopting above-mentioned technical scheme, because electrically conductive pressing member is controllable to lean on or break away from with electrically conductive holder, consequently, when utilizing two conveying clamping unit conveying two-sided battery piece, can control electrically conductive pressing member and electrically conductive holder and break away from to avoid electrically conductive pressing member and the two-sided battery piece in the conveying to take place to interfere. When the two conveying clamping units are used for testing the double-sided battery piece, the conductive pressing piece and the conductive clamping piece can be controlled to abut against each other. At the moment, the conductive pressing piece applies pressing force to the double-sided battery through the conductive clamping piece so as to ensure that the double-sided battery piece is relatively fixed at the preset position. When the tester is used for testing the double-sided battery piece, the test probe of the tester can be electrically connected with the conductive pressing piece. At the moment that the test probe contacts with the conductive pressing piece, certain impact force can be applied to the test probe, and the conductive pressing piece is borne by the bearing part and abuts against the conductive clamping piece, so that the impact force can be dispersed by the bearing part. Based on this, can reduce the influence of impact force to electrically conductive holder and two-sided battery piece position to ensure test accuracy.

As a possible implementation manner, the bearing part is a transparent insulating bearing frame. In practical application, after the double-sided battery piece is conveyed to the preset position, the bearing part can drive the conductive pressing piece to abut against the conductive clamping part. Meanwhile, the bilateral light sources are started to irradiate the simulated sunlight on the front and the back of the double-sided cell. Because the bearing part is of a transparent structure, the shielding of the bearing part on the simulated sunlight can be reduced, and the utilization rate of the simulated sunlight is improved. Moreover, the bearing part is specifically the bearing frame, namely the bearing frame is provided with the hollow part, so that the shielding of the bearing part on the simulated sunlight can be reduced, and the utilization rate of the simulated sunlight is further improved.

As a possible implementation manner, the test assisting tool further includes a non-reflective protection member, and the non-reflective protection member is at least arranged in a region outside the pressing unit. In practical application, after the double-sided battery piece reaches the preset position and is pressed by the pressing unit, the double-sided light source needs to be turned on simultaneously. Because the non-reflective protection pieces are arranged in the regions except the pressing units, the mutual influence of the light sources on two sides can be effectively reduced by using the non-reflective protection pieces under the condition that the double-sided battery pieces do not influence the receiving of the simulated sunlight, and the test precision is improved.

As a possible implementation mode, the conveying line is a conveying belt, a plurality of through holes are formed in the conveying belt at intervals, and a conductive cylinder is clamped in each through hole. The conductive clamping piece is inserted at one end of the conductive cylinder close to the double-sided battery piece. Under the condition that the conductive pressing piece is abutted against the conductive clamping piece, the conductive pressing piece is inserted at one end, far away from the double-sided battery piece, of the conductive barrel.

Under the condition of adopting above-mentioned technical scheme, electrically conductive section of thick bamboo clamps in the through-hole on the conveyer belt, and electrically conductive holder inserts and establishes the one end that is close to two-sided battery piece in electrically conductive section of thick bamboo. That is to say, the conductive cylinder and the conveyor belt as well as the conductive clamping piece and the conductive cylinder are connected in a detachable way. When one or more conductive cylinders or conductive clamping pieces need to be replaced due to faults, the conductive cylinders or the conductive clamping pieces can be independently detached and replaced. Based on this, not only can practice thrift the use cost of electrically conductive section of thick bamboo or electrically conductive holder, can also improve the maintenance efficiency of test auxiliary fixtures.

As a possible implementation manner, one end of the conductive clamping piece clamping the double-sided battery piece is of an arc surface structure and is bent towards the conveying direction away from the double-sided battery piece. Or one end of the conductive clamping piece for clamping the double-sided battery piece is of an arc surface structure and is bent towards the conveying direction of the double-sided battery piece.

Under the condition of adopting above-mentioned technical scheme, the one end design of the two-sided battery piece of electrically conductive holder centre gripping is cambered surface structure, when electrically conductive holder promoted (when bending to the direction of transfer of two-sided battery piece, electrically conductive holder promoted two-sided battery piece) or pulling (when bending to the direction of transfer of the two-sided battery piece of back of the body, electrically conductive holder promoted two-sided battery piece) two-sided battery piece, guarantee under the circumstances of driving force or pulling power stability at cambered surface structure, can improve the stability of two-sided battery piece in the data send process. Based on the method, the risk of shaking of the double-sided battery piece in the conveying process can be effectively reduced, and the risk of hidden cracking of the double-sided battery piece due to shaking is reduced.

As a possible implementation, the orthographic projection of the conductive clamping piece on the main grid line covers the main grid line. Or the orthographic projection of the conductive clamping piece on the main grid line is positioned in the area of the main grid line.

Under the condition of adopting the technical scheme, the orthographic projection of the conductive clamping piece on the main grid line covers the main grid line or is positioned in the area of the main grid line, and at the moment, the conductive clamping piece cannot cover the area outside the main grid line of the double-sided battery piece. Therefore, the shielding of the conductive clamping piece on the double-sided cell piece can be reduced, and the utilization rate of the double-sided cell piece on the simulated sunlight is improved.

As a possible implementation, the two transfer gripping units are symmetrically distributed.

As a possible implementation, the conductive clamping member is an elastic conductive clamping member. Under the condition that the conductive clamping piece is an elastic conductive clamping piece, the elastic clamping piece is in elastic contact with the double-sided battery piece. That is, the contact of the elastic clamping member with the double-sided battery piece is not rigid contact. Therefore, in the process that the elastic clamping piece pushes or pulls the double-sided battery piece to move, the damage of the elastic clamping piece to the double-sided battery piece can be reduced, and the yield of the double-sided battery piece is ensured.

In a second aspect, the present invention further provides a testing system, which includes a darkroom, a testing auxiliary tool, a simulation light source and a tester. The test auxiliary tool is accommodated in the darkroom, the simulation light source is accommodated in the darkroom, and the simulation light source is arranged corresponding to each transmission clamping unit included by the test auxiliary tool. The test probe that the tester includes is connected with the electrically conductive holder electricity that test auxiliary fixtures included. The test auxiliary tool is the test auxiliary tool of the technical scheme.

Compared with the prior art, the beneficial effects of the test system provided by the utility model are the same as those of the test auxiliary tool in the technical scheme, and the details are not repeated here.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 is a perspective view of a test auxiliary tool according to an embodiment of the present invention;

fig. 2 is a front view of a test auxiliary tool according to an embodiment of the present invention (in a state where a pressing unit is detached from a conveying and clamping unit);

fig. 3 is a front view of a test auxiliary tool according to an embodiment of the present invention (in a state where a pressing unit abuts against a conveying and clamping unit);

fig. 4 is a top view of a test auxiliary tool according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a transfer clamping unit according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a pressing unit according to an embodiment of the present invention;

fig. 7 is a perspective view of a conductive clamping member provided in an embodiment of the present invention;

FIG. 8 is a front view of a conductive clip provided by an embodiment of the present invention;

fig. 9 is a perspective view of a conductive pressing member according to an embodiment of the present invention;

fig. 10 is a front view of a conductive pressing member according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a test system according to an embodiment of the present invention.

Reference numerals:

1-double-sided battery piece;

2-conveying clamping unit, 20-rotating roller, 21-conveying line,

22-conductive clamping member, 23-pressing unit, 230-bearing part,

231-conductive pressing member, 220-connecting portion, 221-clamping portion,

3-darkroom, 4-simulated light source.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. The meaning of "a number" is one or more unless specifically limited otherwise.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In view of the technical problems in the prior art, in a first aspect, an embodiment of the present invention provides a test auxiliary tool.

Referring to fig. 1 to 4, the test auxiliary tool is applied to a double-sided battery piece 1. The test auxiliary tool comprises two conveying clamping units 2 which are distributed up and down oppositely. Each conveying clamping unit 2 comprises two rotating rollers 20 arranged at intervals along a first direction, conveying lines 21 arranged on the rotating rollers 20 at intervals are sleeved at intervals, and each conveying line 21 corresponds to one main grid line on the double-faced battery piece 1. A plurality of conductive clamping pieces 22 are arranged on each conveying line 21 at equal intervals, and the plurality of conductive clamping pieces 22 on each conveying line 21 are all controllably abutted on the main grid corresponding to the conveying line 21.

Referring to fig. 1 to 4, a gap for conveying the double-sided battery piece 1 is formed between two conveying clamping units 2 which are oppositely distributed up and down. The height of the above gap (the extension of the gap in the direction perpendicular to the conveying and clamping unit 2 may be defined as the height) may be determined according to the thickness of the double-sided battery sheet 1 and the required clamping force. For example, the height of the gap may be substantially equal to the thickness of the double-sided battery sheet 1, and then the height of the gap is slightly adjusted in a direction approaching or separating from the double-sided battery sheet 1 according to the clamping force required by the double-sided battery sheet 1, so that the double-sided battery sheet 1 is not crushed or inconvenient to convey due to an excessively small gap, and the conveying force cannot be applied to the double-sided battery sheet 1 due to an excessively large gap when the double-sided battery sheet 1 is conveyed in the gap. That is, on the one hand, damage to the double-sided battery sheet 1 due to excessive clamping force of the conveying clamping unit 2 is avoided. On the other hand, the conveying clamping unit 2 is prevented from being incapable of providing enough clamping conveying force for the double-sided battery piece 1 due to too small clamping force, and the smooth conveying of the double-sided battery piece 1 is prevented from being influenced.

Referring to fig. 1 to 5, both ends of the two rotating rollers 20 included in each transfer nip unit 2 may be supported by bearings to ensure stability of the rotating rollers 20 during rotation. The two rotating rollers 20 included in each transfer nip unit 2 may include a driving rotating roller and a driven rotating roller. The driving transmission roller can be driven by a motor and a speed reducer, and the driven rotating rollers can be driven to rotate along with the transmission lines 21 sleeved on the two rotating rollers 20. The arrangement of the driving rotating roller and the driven rotating roller can ensure the synchronization of the rotation of the two rotating rollers 20.

Referring to fig. 1 to 5, the number of the conveying lines 21 on the rotating roller 20, which are sleeved with the spacers, may be determined according to the number of the bus bars on the double-sided battery sheet 1. For example, the number of the transmission lines 21 may be equal to the number of the bus bars, that is, one transmission line 21 is disposed corresponding to one bus bar, and the transmission line 21 is located directly above or below the bus bar.

Referring to fig. 1 to 5, the number of the conductive clamping members 22 provided on each of the conveying lines 21 may be set according to actual needs, and is not particularly limited herein. For example, a number of conductive clips 22 may be provided depending on the overall length of the bus bar. The conductive holder 22 and the transmission line 21 are disposed in various ways, and are not limited in particular. The conductive clamping member 22 has a conductive and clamping function, and the double-sided battery piece 1 and a test probe of the tester are electrically connected by using the conductivity of the conductive clamping member. The clamping and conveying of the double-sided battery piece 1 are realized by utilizing the clamping performance, specifically, in the conveying process of the double-sided battery piece 1, the main grid lines on the front surface and the back surface of the double-sided battery piece 1 are abutted against the conductive clamping piece 22, and the conveying of the double-sided battery piece 1 is realized by utilizing the friction force of the conductive clamping piece 22 rotating along with the conveying line 21 and acting on the main grid lines.

Referring to fig. 1 to 4, the plurality of conductive clamping members 22 on each of the transfer lines 21 are controllably abutted against the main grid line corresponding to the transfer line 21. That is, at least one transfer clamping unit 2 can move towards or away from the double-sided battery piece 1, so as to adjust the force when the conductive clamping piece 22 abuts against the double-sided battery piece 1 according to the actual thickness of the double-sided battery piece 1 and the required clamping force.

When the auxiliary testing tool provided by the embodiment of the utility model is applied to the test of the double-sided battery piece 1, the two rotating rollers 20 included in each conveying and clamping unit 2 can be controlled to rotate at the same speed and in the same rotating direction, the main grid line on the front surface of the double-sided battery piece 1 is in contact with the conductive clamping piece 22 on the conveying line 21 included in one conveying and clamping unit 2, and the main grid line on the back surface of the double-sided battery piece 1 is in contact with the conductive clamping piece 22 on the conveying line 21 included in the other conveying and clamping unit 2. When the rotating roller 20 drives the conveying line 21 to rotate and the conveying line 21 drives the conductive clamping piece 22 to move, the conductive clamping piece 22 pushes (or pulls) the double-sided battery piece 1 to move between the two conveying clamping units 2. After the double-sided battery piece 1 moves to a preset position (the preset position may be a region irradiated by the double-sided light source), a probe included in the tester may be electrically connected to the conductive clamping member 22, so as to test the double-sided battery piece 1. After the test is completed, the double-sided battery sheet 1 is continuously moved out of the preset position by the conveying line 21 rotating with the rotating roller 20 and the conductive clamping member 22 moving with the conveying line 21.

From the application, the test auxiliary tool provided by the utility model has the functions of conveying the double-sided battery piece 1 and assisting in testing the double-sided battery piece 1. Based on this, in the case of shortening the conveying route of the double-sided battery sheet 1 during the test, the conveying and testing steps of the double-sided battery sheet 1 can be simplified. Meanwhile, the size of the test auxiliary tool can be reduced.

Referring to fig. 2, 3 and 5, in one implementation, the test auxiliary tool further includes a pressing unit 23, and one pressing unit 23 is correspondingly disposed on at least one of the conveying and clamping units 2. The pressing units 23 each include a bearing part 230 and a conductive pressing member 231 provided on the bearing part 230. The conductive pressing member 231 is controllably brought into abutment with or disengaged from the conductive holder 22.

Referring to fig. 2 and 3, in practical application, after the double-sided battery piece 1 is transferred to a preset position by the two transfer clamping units 2 and the double-sided light source is turned on, the test probe included in the tester needs to abut against the conductive clamping piece 22 to complete the test of the double-sided battery piece 1. It will be appreciated that the delivery wire 21 is typically a flexible delivery wire 21. That is, the conveying wire 21 has certain elasticity, so that the conveying wire 21 may shake with a small amplitude by an external force. The swaying transmission line 21 can drive the swaying of the conductive clamping piece 22, and at this time, the contact between the conductive clamping piece 22 and the main grid line on the double-sided battery piece 1 is easy to be unstable. And when the test probe supports against the instant of electrically conductive holder 22, will exert the impact force to electrically conductive holder 22, under the effect of impact force, flexible transmission line 21 and electrically conductive holder 22 will take place to rock to influence the measuring accuracy. When the two conveying clamping units 2 are used for conveying the double-sided battery piece 1, the pressing unit 23 included in the test auxiliary tool provided by the embodiment of the utility model can control the conductive pressing piece 231 included in the pressing unit 23 to be separated from the conductive clamping piece 22, so that the conductive pressing piece 231 is prevented from interfering with the double-sided battery piece 1 in conveying. When the double-sided battery sheet 1 is tested by using the two transfer clamp units 2, the conductive pressing member 231 can be controlled to abut against the conductive clamp member 22. At this time, the pressing unit 23 presses the conveying wire 21 and the conductive holder 22 against the main grid line of the double-sided battery sheet 1. That is, the conveying line 21 and the conductive holder 22 are fixed to the main grid line of the double-sided battery sheet 1. When the test probe that the tester has contacted with electrically conductive pressing part 231, the impact force that produces can not lead to the fact undulant to transfer line 21 and electrically conductive holder 22, at this moment, can ensure electrically conductive holder 22 and the main grid line contact stability on the two-sided battery piece 1 to improve test accuracy.

Referring to fig. 2, 3 and 6, as an example, an accommodating space is formed by enclosing the conveying line 21 wound on the rotating roller 20, and the pressing unit 23 may be disposed in the accommodating space and may approach or separate from the double-sided battery sheet 1 in a direction perpendicular to the double-sided battery sheet 1, so as to realize controllable abutting or disengaging of the conductive pressing member 231 against or from the conductive clamping member 22.

Or, the pressing unit 23 may be disposed outside the accommodating space, and after the double-sided battery piece 1 is conveyed to the preset position, the pressing unit 23 may enter the accommodating space and approach or depart from the double-sided battery piece 1 along a direction perpendicular to the double-sided battery piece 1 after entering, so as to realize that the conductive pressing member 231 is controllably abutted against or disengaged from the conductive clamping member 22.

Referring to fig. 2 and 3, the pressing unit 23 may be moved toward or away from the double-sided battery sheet 1 in a direction perpendicular to the double-sided battery sheet 1. For example, the conductive pressing member 231 and the bearing part 230 are tightly connected together, and the conductive pressing member 231 and the bearing part 230 may be integrally pressed down or lifted up. For another example, the conductive pressing member 231 is fastened to the bearing portion 230, and the conductive pressing member 231 may be a retractable conductive pressing member 231. At this time, the position of the bearing part 230 can be relatively fixed with respect to the double-sided battery piece 1, and the bearing part is abutted against or separated from the conductive clamping member 22 by the extension and contraction of the conductive pressing member 231.

Referring to fig. 6, as a possible implementation manner, the bearing part 230 is a transparent insulating bearing frame. In practical application, after the double-sided battery piece 1 is conveyed to the preset position, the bearing part 230 can drive the conductive pressing part 231 to abut on the conductive clamp. Meanwhile, the double-side light source is turned on to irradiate the simulated sunlight on the front and back surfaces of the double-sided battery piece 1. Because the bearing part 230 is a transparent structure, the shielding of the bearing part 230 on the simulated sunlight can be reduced, so as to improve the utilization rate of the simulated sunlight. Moreover, since the carrying part 230 is specifically a carrying frame, that is, the carrying frame has a hollow part, the shielding of the carrying part 230 on the simulated sunlight can be reduced, and the utilization rate of the simulated sunlight is further improved.

Referring to fig. 6, the insulating transparent frame has various structures, and is not limited in detail. For example, the insulating transparent carrying frame may include two main carrying rods disposed in parallel at intervals, and a plurality of sub carrying rods perpendicular to the main carrying rods are disposed between the main carrying rods. A plurality of mounting holes are formed in the sub-carrier bar at intervals, and the conductive pressing member 231 is inserted into the mounting holes. For another example, a carrier plate is disposed between the main carrier bars, a plurality of mounting holes are formed in the carrier plate, the mounting holes are distributed in a regular matrix, and the conductive pressing member 231 is inserted into the mounting holes.

Referring to fig. 9 and 10, as an example, the conductive pressing member 231 according to an embodiment of the present invention may be a conductive pressing column, and after the conductive pressing column is inserted into the mounting hole, both ends of the conductive pressing column protrude from the sub-carrier bar or the carrier plate.

Referring to fig. 1 to 3, as a possible implementation manner, the test assisting tool further includes a non-reflective protection member (not shown in the drawings), and the non-reflective protection member is disposed at least in a region outside the pressing unit. In practical applications, after the double-sided battery piece reaches the preset position and is pressed by the pressing unit 23, the double-sided light source needs to be turned on simultaneously. Since the non-reflective protection parts are arranged in the regions (which can be defined as non-test regions) outside the pressing units 23, the mutual influence of the double-sided light sources can be effectively reduced by using the non-reflective protection parts under the condition that the double-sided cell pieces do not influence the receiving of the simulated sunlight, so that the test precision is improved.

As an example, the non-reflective protection member may be a black non-reflective plate, and may be particularly disposed in a non-test area without affecting an area where the transporting clamping unit transports the double-sided battery sheet. For example, may be provided in the space between the conveyor lines in the non-test area.

Referring to fig. 1 to 6, as a possible implementation manner, the conveying line 21 is a conveyor belt, a plurality of through holes are formed at intervals on the conveyor belt, and a conductive cylinder is clamped in each through hole. The conductive clamping piece 22 is inserted at one end of the conductive cylinder close to the double-sided battery piece 1. Under the condition that the conductive pressing piece 231 abuts against the conductive clamping piece 22, the conductive pressing piece 231 is inserted at one end of the conductive cylinder, which is far away from the double-sided battery piece 1.

The conductive cylinder is clamped in the through hole on the conveyor belt, and the conductive clamping piece 22 is inserted at one end of the conductive cylinder close to the double-sided battery piece 1. That is, the conductive tube and the conveyor belt and the conductive holder 22 and the conductive tube are detachably connected. When one or more conductive cylinders or conductive clamping pieces 22 need to be replaced due to faults, the conductive cylinders or the conductive clamping pieces can be detached and replaced independently. Based on the structure, the use cost of the conductive cylinder or the conductive clamping piece 22 can be saved, and the maintenance efficiency of the test auxiliary tool can be improved

It should be explained that the end of the conductive cylinder facing away from the double-sided battery piece 1 is flush with the inner surface of the transmission belt, so as to ensure that the transmission belt does not collide with the rotating roller 20 due to the protrusion of the end of the conductive cylinder when contacting the rotating roller 20.

Referring to fig. 7 and 8, as an example, one end of the conductive clamping member 22 clamping the double-sided battery piece 1 is in a cambered surface structure.

Referring to fig. 7 and 8, the specific structure of the conductive clamping member 22 may include a connection portion 220 connected to the conductive cylinder, and the connection portion 220 may be a cylindrical structure, but is not limited thereto. The conductive clamping portion 221 may further include a clamping portion 221 integrally or separately provided with the connection portion 220, and the clamping portion 221 may have a flat structure. Specifically, the surface of the clamping portion 221 contacting the double-sided battery piece 1 may be a cambered surface structure. The arc-shaped structure can make the contact between the clamping part 221 and the double-sided battery piece 1 smoother. At this time, the stability of the double-sided battery sheet 1 during conveyance can be improved. Therefore, the risk of shaking of the double-sided battery piece 1 in the conveying process can be effectively reduced, and the risk of hidden cracking of the double-sided battery piece 1 due to shaking is reduced.

Referring to fig. 1 to 5, as an example, one end of the conductive clamping member 22 clamping the bifacial battery piece 1 is bent away from the conveying direction of the bifacial battery piece 1 or toward the conveying direction of the bifacial battery piece 1. When one end of the double-sided battery piece 1 clamped by the conductive clamping piece 22 is bent towards the conveying direction away from the double-sided battery piece 1, the conductive clamping piece 22 pulls the double-sided battery piece 1. When one end of the double-sided battery piece 1 clamped by the conductive clamping piece 22 is bent towards the conveying direction of the double-sided battery piece 1, the conductive clamping piece 22 pushes the double-sided battery piece 1.

Referring to fig. 1-6, an orthographic projection of the conductive clip 22 on a bus bar covers the bus bar. Alternatively, the orthographic projection of the conductive clip 22 on a busbar is located within the region of the busbar. The extending length of the clip portion 221 of the conductive clip 22 in the direction perpendicular to the bus bar line is defined as the width of the clip portion 221. The extension length of the conductive presser 231 in the direction perpendicular to the bus bar line is defined as the width of the conductive presser 231. At this time, the width of the clamping portion 221 and the width of the conductive pressing member 231 may be smaller than or equal to the width of the bus bar. Therefore, the conductive clamping piece 22 and the conductive pressing piece 231 do not cover the regions of the double-sided battery piece 1 except the main grid lines. Therefore, the shielding of the double-sided cell 1 by the conductive clamping piece 22 can be reduced, and the utilization rate of the double-sided cell 1 to simulated sunlight is improved.

As a possible implementation, two transfer gripping units 2 are symmetrically distributed, see fig. 1 to 3. At this time, the rotating rollers 20, the conveying lines 21, and the conductive holders 22 included in the two conveying units are mirror-symmetrical.

Referring to fig. 8 and 9, as one possible implementation, the conductive clip 22 is a resilient conductive clip 22. Specifically, the conductive clip 22 may be a metal spring sheet with certain elasticity. When the conductive clamping member 22 is an elastic conductive clamping member 22, the elastic clamping member is in elastic contact with the double-sided battery piece 1. That is, the elastic clamping member is not in rigid contact with the double-sided battery sheet 1. Therefore, in the process that the elastic clamping piece pushes or pulls the double-sided battery piece 1 to move, the damage of the elastic clamping piece to the double-sided battery piece 1 can be reduced, and the yield of the double-sided battery piece 1 is ensured.

Referring to fig. 11, an embodiment of the present invention further provides a test system. The test system comprises a darkroom 3, a test auxiliary tool, a simulation light source 4 and a tester, wherein the test auxiliary tool is accommodated in the darkroom 3, the simulation light source 4 is accommodated in the darkroom 3, and each transmission clamping unit 2 corresponding to the test auxiliary tool is provided with one simulation light source 4. The test probes included in the tester are electrically connected with the conductive clamping pieces 22 included in the test auxiliary tool. The test auxiliary tool is the test auxiliary tool in the technical scheme.

As an example, a non-reflective protection part (not shown in the figure) may be disposed in an area except the test auxiliary tool in the darkroom 3, and the darkroom 3 is divided into two relatively independent spaces by the non-reflective protection part, at this time, the two simulated light sources 4 are respectively located in the two relatively independent spaces, so as to effectively avoid the mutual influence between the two simulated light sources 4, and improve the test accuracy.

Compared with the prior art, the beneficial effects of the test system provided by the embodiment of the utility model are the same as those of the test auxiliary tool in the technical scheme, and the detailed description is omitted here.

In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (10)

1. The auxiliary test tool is characterized by being applied to a double-sided battery piece; the test auxiliary tool comprises two conveying clamping units which are distributed up and down oppositely; each of the transfer gripping units includes:

two rotating rollers arranged at intervals along a first direction;

conveying lines are sleeved on the rotating roller at intervals, and each conveying line corresponds to one main grid line on the double-sided battery piece;

each equal interval sets up a plurality of electrically conductive holders on the transfer line, each a plurality of electrically conductive holders on the transfer line all controllable support lean on with the transfer line is corresponding on the main grid.

2. The test auxiliary tool according to claim 1, further comprising a pressing unit; at least one conveying clamping unit is correspondingly provided with one pressing unit; the pressing units comprise bearing parts and conductive pressing pieces arranged on the bearing parts;

the conductive pressing piece can be controlled to abut against or separate from the conductive clamping piece.

3. The auxiliary test tool according to claim 2, wherein the bearing part is a transparent insulating bearing frame.

4. The test aid of claim 2, further comprising a non-reflective shield member disposed at least in an area outside the compression unit.

5. The auxiliary testing tool according to claim 2, wherein the conveying line is a conveyor belt, a plurality of through holes are formed in the conveyor belt at intervals, and a conductive cylinder is clamped in each through hole; the conductive clamping piece is inserted at one end of the conductive cylinder close to the double-sided battery piece;

under the condition that the conductive pressing piece is abutted against the conductive clamping piece, the conductive pressing piece is inserted into one end, far away from the double-sided battery piece, of the conductive cylinder.

6. The auxiliary test tool according to claim 1, wherein one end of the conductive clamping piece, which clamps the double-sided battery piece, is of an arc-shaped structure and is bent in a direction away from the conveying direction of the double-sided battery piece; or one end of the conductive clamping piece for clamping the double-sided battery piece is of an arc surface structure and is bent towards the conveying direction of the double-sided battery piece.

7. The test auxiliary tool according to claim 1, wherein an orthographic projection of the conductive clamping piece on the main grid line covers the main grid line; or the orthographic projection of the conductive clamping piece on the main grid line is positioned in the area of the main grid line.

8. The test auxiliary tool according to claim 1, wherein the two conveying clamping units are symmetrically distributed.

9. The test auxiliary tool according to claim 1, wherein the conductive clamping member is an elastic conductive clamping member.

10. A test system is characterized by comprising a darkroom, a test auxiliary tool, a simulation light source and a tester; the test auxiliary tool is accommodated in the darkroom, the simulation light source is accommodated in the darkroom, and the simulation light source is arranged corresponding to each conveying clamping unit of the test auxiliary tool; the test probe included by the tester is electrically connected with the conductive clamping piece included by the test auxiliary tool;

the test auxiliary tool is the test auxiliary tool according to any one of claims 1 to 9.

Images