Solar cell testing device and processing system

Abstract

The utility model discloses a testing device and a processing system for a solar cell. The testing device comprises a base, a transmission mechanism, a testing plate and a conductive assembly, the transmission mechanism is movably connected to the base, the test plate is connected to the transmission mechanism, the base is provided with a feeding station and a detection station, and the conductive assembly is arranged at the detection station; the test board is provided with a test surface used for placing a battery piece, one side of the test board deviating from the test surface is provided with a connecting terminal, and the connecting terminal is used for being electrically connected with the battery piece on the test surface; the transmission mechanism can move relative to the base so as to drive the test plate to move between the feeding station and the detection station; and when the test plate is located at the detection station, the connecting terminal is in contact with the conductive assembly, so that the battery piece is electrically connected with the conductive assembly. The testing device is simple in structure, convenient to operate and convenient to combine with equipment in a production line, and online detection of the battery piece can be achieved.

Description

Technical Field

[0001] The present application belongs to the field of photovoltaic technology, and specifically relates to a testing device and processing system for solar cells. Background Art

[0002] Solar energy is a reliable clean energy source. Photovoltaic modules can effectively utilize solar energy. Its main component is solar cells. Conventional photovoltaic modules generally use a number of cells in series to increase the output voltage. If bad cells with hot spot risks are mixed into photovoltaic modules, it will seriously affect the reliability of the product and greatly reduce the power output capacity of photovoltaic modules. In severe cases, the heat of the cells will burn the packaging materials (such as polymer backplane).

[0003] In the related art, a probe-type test fixture is usually used for hot spot testing, by setting a probe row under the cell and pressing a glass plate on the cell, and then applying a reverse bias to the cell through the probe row, and using an infrared camera to take infrared photos to analyze and detect the hot spot effect. However, this hot spot detection method is complicated to operate and is not convenient for online detection of cells. Utility Model Content

[0004] The present application aims to provide a testing device and processing system for solar cells, which can solve the problem that the hot spot detection method in the related art is complicated to operate and inconvenient for online detection of solar cells.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] In a first aspect, an embodiment of the present application provides a solar cell testing device, comprising: a base, a transmission mechanism, a testing board, and a conductive component;

[0007] The transmission mechanism is movably connected to the base, the test board is connected to the transmission mechanism, the base is provided with a loading station and a detection station, and the conductive component is provided at the detection station for connecting with a test instrument;

[0008] The test board is provided with a test surface for placing battery cells, and the test board is provided with connecting terminals on a side away from the test surface, and the connecting terminals are used to electrically connect with the battery cells on the test surface; the transmission mechanism can move relative to the base to drive the test board to move between the loading station and the inspection station; when the test board is located at the inspection station, the connecting terminals are in contact with the conductive components to electrically connect the battery cells with the conductive components.

[0009] Optionally, a conductive circuit is provided in the test board, and a plurality of conductive contacts are provided on the test surface, and the plurality of conductive contacts are electrically connected to the connection terminals through the conductive circuit; a vacuum hole is also provided in the test surface for adsorbing and fixing the battery cell so that the battery cell contacts the conductive contacts.

[0010] Optionally, the conductive circuit includes a first circuit and a second circuit, the first circuit and the second circuit are respectively arranged in the test board, the first circuit and the second circuit are insulated from each other, some of the conductive contacts are electrically connected to the first circuit, and other parts of the conductive contacts are electrically connected to the second circuit, and the first circuit and the second circuit are respectively electrically connected to the connecting terminals.

[0011] Optionally, the first circuit and the second circuit both include a bus and a plurality of branch lines, the bus is provided in the test board, the plurality of branch lines are provided on both sides of the bus and are electrically connected to the bus, the bus is electrically connected to the connection terminal, and each branch line is connected to at least one of the conductive contacts;

[0012] The branches in the first circuit and the branches in the second circuit are arranged alternately and spaced apart; and / or, along a direction perpendicular to the test surface, the orthographic projection of the bus in the first circuit and the orthographic projection of the bus in the second circuit at least partially overlap.

[0013] Optionally, the connecting terminal includes a terminal body, a first conductive member and a second conductive member, the terminal body is connected to the test board, the first conductive member and the second conductive member are respectively inserted into the terminal body, one end of the first conductive member is electrically connected to the first circuit, one end of the second conductive member is electrically connected to the second circuit, and the other ends of the first conductive member and the second conductive member are respectively used to be electrically connected to the test instrument.

[0014] Optionally, the conductive component includes a bracket and a plurality of conductive springs, the bracket is arranged at the detection station, the conductive springs are arranged on the bracket, and when the test board is located at the detection station, the conductive springs are in contact with the connection terminals.

[0015] Optionally, a surface of a side of the conductive spring away from the bracket is an arc surface, and the arc surface protrudes in a direction away from the bracket.

[0016] Optionally, the testing device further includes: a support plate, the support plate is connected to the transmission mechanism, the test plate is mounted on the support plate, a avoidance opening is provided in the support plate, the connecting terminal is passed through the avoidance opening and is at least partially exposed on a side of the support plate away from the test plate; a plurality of vacuum grooves are provided in the support plate, the vacuum holes are connected to the vacuum grooves, and the vacuum grooves are used to connect to a vacuum pumping system to provide negative pressure to the vacuum holes.

[0017] Optionally, the testing device further comprises an image acquisition mechanism, which is disposed above the conductive component and is used to acquire an image of the battery cell on the testing surface;

[0018] And / or, the testing device further comprises a light source, which is disposed above the conductive component and is used to irradiate light to the battery cell on the testing surface.

[0019] Optionally, the testing instrument includes a power supply, a control unit and a data analysis unit, and the conductive component is electrically connected to the power supply; the control unit is electrically connected to the power supply, the image acquisition mechanism and the data analysis unit, respectively, and is used to control the power supply to energize the conductive component, control the image acquisition mechanism to acquire the image of the battery cell, and control the data analysis unit to analyze the image of the battery cell.

[0020] In the second aspect, an embodiment of the present application proposes a solar cell processing system, comprising: a cell processing device and a testing device as described above; the testing device is located at a downstream workstation of the cell processing device, the cell processing device is used to process cell cells, and the testing device is used to detect cell cells processed by the processing device.

[0021] In an embodiment of the present application, a transmission mechanism is provided on the base, and the test board is installed on the transmission mechanism. The transmission mechanism can drive the test board to move between the loading station and the detection station, and a conductive component is provided at the detection station. Furthermore, at the loading station, the battery cell to be tested is placed on the test surface of the test board, and the transmission mechanism is used to drive the test board to move to the detection station for testing, so that the connection terminals on the test board are in contact with the conductive components. In this way, the battery cells in the test board can be electrically connected to the test instrument through the cooperation of the connection terminals and the conductive components, so as to perform performance testing on the battery cells. The detection device of the present application has a simple structure, is easy to operate, and is easy to combine with production equipment, thereby realizing online detection of battery cells.

[0022] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0024] Figure 1 is a schematic diagram of a battery cell processing system according to an embodiment of the present application;

[0025] Figure 2 is a schematic diagram of a test board according to an embodiment of the present application;

[0026] Figure 3 is one of the exploded views of the test board according to an embodiment of the present application;

[0027] Figure 4 This is the second exploded view of the test board according to the embodiment of the present application;

[0028] Figure 5 is a schematic diagram of a first circuit according to an embodiment of the present application;

[0029] Figure 6 is a schematic diagram of a second circuit according to an embodiment of the present application;

[0030] Figure 7 is a schematic diagram of a conductive circuit according to an embodiment of the present application;

[0031] Figure 8 is a schematic diagram of a support plate according to an embodiment of the present application;

[0032] Fig. 9 is a schematic diagram of a testing device according to an embodiment of the present application;

[0033] Fig.10 This is one of the schematic diagrams of the matching structure of the test board and the conductive component according to an embodiment of the present application;

[0034] Fig.11 This is a second schematic diagram of the matching structure of the test board and the conductive component according to an embodiment of the present application;

[0035] Fig.12 It is a cross-sectional view of the matching structure of the test board and the conductive component according to an embodiment of the present application.

[0036] Reference numerals:

[0037] 110: test board; 111: test surface; 112: vacuum hole; 120: connection terminal; 121: terminal body; 122: first conductive member; 123: second conductive member; 130: conductive circuit; 131: first circuit; 130a: bus; 130b: branch line; 1311: first bus; 1312: first branch line; 132: second circuit; 1321: second bus; 1322: second branch line; 14 0: conductive contact; 141: first contact; 142: second contact; 150: support plate; 151: avoidance port; 152: vacuum groove; 20: base; 20a: loading station; 20b: detection station; 30: transmission mechanism; 310: rotating table; 320: driving mechanism; 50: conductive component; 510: bracket; 520: conductive spring; 60: image acquisition mechanism; 70: transmission mechanism; 80: transfer mechanism. DETAILED DESCRIPTION

[0038] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0039] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this application, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0040] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0041] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0042] The auxiliary test assembly, test device and battery cell processing system provided in the embodiments of the present application are described in detail below through specific embodiments and their application scenarios in combination with the accompanying drawings.

[0043] like Figures 1 to 12 As shown, the test device according to some embodiments of the present application includes: a base 20, a transmission mechanism 30, a test board 110 and a conductive component 50; the transmission mechanism 30 is movably connected to the base 20, the test board 110 is connected to the transmission mechanism 30, the base 20 is provided with a loading station 20a and a detection station 20b, and the conductive component 50 is provided at the detection station 20b for connecting with a test instrument; a test surface 111 is provided on the test board 110 for placing battery cells, and a connection terminal 120 is provided on the side of the test board 110 away from the test surface 111, and a connection terminal 120 is provided. The connecting terminal 120 is used to electrically connect to the battery cell on the test surface 111; the transmission mechanism 30 can move relative to the base 20 to drive the test board 110 to move between the loading station 20a and the detection station 20b; when the test board 110 is located at the detection station 20b, the connecting terminal 120 contacts the conductive component 50 to electrically connect the battery cell to the conductive component 50, and when the test board 110 is located at the loading station 20a, the connecting terminal 120 disconnects from the conductive component 50 to interrupt the electrical connection between the battery cell and the conductive component 50.

[0044] In the embodiment of the present application, a transmission mechanism 30 is provided on the base 20, and the test board 110 is installed on the transmission mechanism 30. The transmission mechanism 30 can drive the test board 110 to move between the loading station 20a and the detection station 20b, and the conductive component 50 is provided at the detection station 20b. Then, at the loading station 20a, the battery cell to be tested is placed on the test surface 111 of the test board 110, and the transmission mechanism 30 is used to drive the test board 110 to move to the detection station 20b for testing, so that the connection terminal 120 on the test board 110 is in contact with the conductive component 50. In this way, the battery cell on the test board 110 can be electrically connected to the test instrument through the connection terminal 120 and the conductive component 50, so as to perform performance testing on the battery cell. The detection device of the present application has a simple structure, is easy to operate, and is easy to combine with production equipment, thereby realizing online detection of battery cells.

[0045] It can be understood that the detection device of the embodiment of the present application can be applied to test operation scenarios such as hot spot testing and IV testing of battery cells. The detection device is provided with a test board 110, through which the battery cell can be fixed, and the electrodes of the battery cell can be connected to the positive and negative connection terminals in the testing instrument to collect the electric energy generated by the battery cell, or provide electric energy to the battery cell.

[0046] Specifically, the transmission mechanism 30 may include a rotating table 310 and a driving mechanism 320. The rotating table 310 is rotatably connected to the base 20, the test board 110 is mounted on the rotating table 310, and the driving mechanism 320 is disposed on the base 20 and connected to the rotating table 310. The driving mechanism 320 can drive the rotating table 310 to rotate relative to the base 20, and then the rotating table 310 can drive the test board 110 to move between the loading station 20a and the testing station 20b. Of course, the transmission mechanism 30 can also use other linear or rotary transmission mechanisms, and those skilled in the art can flexibly set it according to actual needs, which is not limited here.

[0047] Among them, the base 20 is provided with a loading station 20a and a detection station 20b. When the test board 110 is located at the loading station 20a, the battery cell can be placed on the test surface 111 of the test board 110. At this time, the connection terminal 120 in the test board 110 can be electrically connected to the electrode of the battery cell.

[0048] It is understandable that a conductive structure may be provided in the test board 110 so that when the battery cell is placed on the test surface 111, the connection terminal 120 is electrically connected to the battery cell. The conductive structure of the test board 110 may be flexibly set according to actual conditions, and this application does not limit it.

[0049] Furthermore, the test board 110 is driven to rotate to the test station 20b through the rotating table 310, so that the connecting terminal 120 is in contact with the conductive component 50, and the conductive component 50 can be connected to an external testing instrument. In this way, the electrodes of the battery cell can be connected to the external testing instrument through the test board 110, the connecting terminal 120 and the conductive component 50, so as to energize the battery cell or extract the current generated by the battery cell to realize the performance detection of the battery cell.

[0050] In some embodiments, a plurality of test plates 110 may be arranged along the circumference of the rotating table 310, for example, Figure 1As shown, four test boards 110 can be arranged along the circumference of the rotating table 310, and a material unloading station is also arranged on the base 20. The rotating table 310 can drive the test board 110 to pass through the loading station 20a, the test station 20b and the unloading station in sequence, and then return to the loading station 20a again, and so on. In this way, the coordinated operation between multiple test boards 110 can be achieved, which is convenient for streamlined testing and can improve testing efficiency. When the test board 110 is located at the unloading station, the connection terminal 120 is disconnected from the conductive component 50 to interrupt the electrical connection between the battery cell and the conductive component 50.

[0051] Alternatively, if Figures 2 to 4 As shown, a conductive circuit 130 is provided in the test board 110, and a plurality of conductive contacts 140 are provided on the test surface 111. The plurality of conductive contacts 140 are electrically connected to the connection terminals 120 through the conductive circuit 130. A vacuum hole 112 is also provided in the test surface 111 for adsorbing and fixing the battery cell so that the battery cell contacts the conductive contacts 140.

[0052] In the embodiment of the present application, a conductive circuit 130 is provided in the test board 110, and a conductive contact 140 is provided in the test surface 111 of the test board 110, and the conductive contact 140 is electrically connected to the connection terminal 120 through the conductive circuit 130. Furthermore, when testing the battery cell, the battery cell is placed on the test surface 111 of the test board 110, and the vacuum hole 112 in the test surface 111 can be used to adsorb and fix the battery cell, so that the electrode on the battery cell contacts the conductive contact 140, and the conductive component 50 can be electrically connected through the conductive contact 140, the conductive circuit 130 and the connection terminal 120, and then the battery cell is electrically connected to the test instrument, so as to test the battery cell, the operation is simple and convenient, and the blocking interference to the battery cell can be reduced by adsorption and fixation.

[0053] Specifically, a plurality of conductive contacts 140 are provided in the test surface 111 of the test board 110. The plurality of conductive contacts 140 can be arranged in rows, and the positions of each row of conductive contacts 140 correspond exactly to the positions of electrodes on the battery cell. When the battery cell is placed on the test surface 111, each electrode on the surface of the battery cell contacts at least one conductive contact 140.

[0054] Among them, the conductive contact 140 can be made of a conductive material, for example, it can be made of a conductive metal material such as copper, aluminum, silver, etc. The conductive contact 140 is installed and fixed on the test surface 111 of the test board 110, one end of the conductive contact 140 is electrically connected to the conductive circuit 130 in the test board 110, and the other end of the conductive contact 140 is exposed on the test surface 111.

[0055] At the same time, a plurality of vacuum holes 112 are arranged in the test surface 111, so that the plurality of vacuum holes 112 and the plurality of conductive contacts 140 can be staggered with each other. During testing, the battery cell is placed on the test surface 111 of the test board 110, and the battery cell can be adsorbed and fixed on the test surface 111 by evacuating the vacuum holes 112.

[0056] Furthermore, a connection terminal 120 is provided on the side of the test board 110 away from the test surface 111, and the connection terminal 120 is electrically connected to the conductive circuit 130 in the test board 110. When the test board 110 moves to the detection station 20b, the end of the connection terminal 120 away from the test board 110 contacts the conductive component 50 to achieve electrical connection between the connection terminal 120 and the conductive component 50. In this way, through the conductive contact 140, the conductive circuit 130, the connection terminal 120 and the conductive component 50, the electrodes of the battery cell can be connected to the test instrument, so that the test instrument can receive the electric energy generated by the battery cell, or provide electric energy to the battery cell, thereby achieving performance testing of the battery cell.

[0057] It is understandable that when testing the battery cell, it is necessary to set a light source or a camera above the battery cell to irradiate light to the battery cell or take a photo of the battery cell. When using the detection device of the present application, it is not necessary to set other components on the surface of the battery cell away from the test board 110 during testing, which can avoid interference with the light source irradiating light and the camera taking photos.

[0058] In some embodiments, the conductive contact 140 can be set as a columnar structure, for example, the conductive contact 140 can be set as a cylindrical conductive structure with a diameter of 0.5-1 mm, and the height of the conductive contact 140 above the test surface 111 can be set to 0.1-0.2 mm. The specific structure and number of the conductive contact 140 can be flexibly set according to the specific test scenario, and the embodiments of the present application are not limited to this.

[0059] Alternatively, if Figures 3 to 6 As shown, the conductive circuit 130 includes a first circuit 131 and a second circuit 132, the first circuit 131 and the second circuit 132 are respectively arranged in the test board 110, the first circuit 131 and the second circuit 132 are insulated from each other, part of the conductive contacts 140 is electrically connected to the first circuit 131, and another part of the conductive contacts 140 is electrically connected to the second circuit 132, and the first circuit 131 and the second circuit 132 are respectively electrically connected to the connecting terminal 120.

[0060] In an embodiment of the present application, the first circuit 131 and the second circuit 132 are integrated into the test board 110, and the first circuit 131 and the second circuit 132 are electrically connected to the connection terminal 120 respectively. In this way, during testing, the first circuit 131 and the second circuit 132 can be used to respectively connect the positive and negative electrodes of the battery cell to the positive and negative ports of the test instrument to meet the testing requirements for the battery cell.

[0061] In some embodiments, the test board 110 may include a first substrate, an insulating layer, and a second substrate stacked in sequence, the test surface 111 is disposed on a side of the first substrate away from the second substrate, the first circuit 131 is disposed between the first substrate and the insulating layer, and the second circuit 132 is disposed between the insulating layer and the second substrate. Furthermore, the first substrate and the second substrate may be used to shield and protect the conductive circuit 130 from both sides, and the insulating layer may be used to insulate and isolate the first circuit 131 from the second circuit 132.

[0062] Then, some of the conductive contacts 140 are electrically connected to the first circuit 131 through the first substrate, and other parts of the conductive contacts 140 are electrically connected to the second circuit 132 after passing through the first substrate and the insulating layer in sequence. The test board 110 with the conductive circuit 130 embedded therein can be obtained by stacking the first substrate, the first circuit 131, the insulating layer, the second circuit 132, and the second substrate in sequence and laminating them. In this way, the structural integration of the entire test board 110 can be increased, and the assembly and use during the test process can be facilitated.

[0063] It should be noted that the first substrate, the insulating layer and the second substrate can be made of the same insulating material or different insulating materials, and can be flexibly arranged according to actual conditions, which is not limited in the embodiments of the present application.

[0064] Of course, the test board 110 may also adopt other structures, as long as the test board 110 can be used to carry the first circuit 131 and the second circuit 132 and achieve insulation isolation between the first circuit 131 and the second circuit 132. This embodiment of the present application is not limited to this.

[0065] Alternatively, if Figure 2 and Figure 7 As shown, the first circuit and the second circuit both include a bus 130a and a plurality of branches, the bus 130a is arranged in the test board, the plurality of branches are arranged on both sides of the bus 130a and are electrically connected to the bus, the bus 130a is electrically connected to the connection terminal, and each branch is connected to at least one conductive contact; the branches in the first circuit and the branches in the second circuit are arranged alternately and at intervals; and / or, along a direction perpendicular to the test surface 111, the orthographic projection of the bus 130a in the first circuit 131 and the orthographic projection of the bus 130a in the second circuit 132 at least partially overlap.

[0066] In the embodiment of the present application, a bus 130a and a branch line 130b are set in the test board 110, so that the bus 130a and the branch line 130b respectively form a first circuit 131 and a second circuit 132. At the same time, the branch line 130b in the first circuit 131 and the branch line 130b in the second circuit 132 are arranged alternately at intervals so as to correspond to the positive and negative electrodes on the battery cell, thereby better meeting the testing requirements of the battery cell.

[0067] Exemplarily, the test device of the present application can be applied to the performance test of a back-contact battery cell, the positive electrode and the negative electrode of the back-contact battery cell are both arranged on the back, and the positive electrode and the negative electrode are arranged alternately. The first circuit 131 and the second circuit 132 correspond to the positions of the positive electrode and the negative electrode on the back of the battery cell, respectively. Of course, the test device of the present application can also be applied to other types of battery cell performance testing, and the structural layout of the first circuit and the second circuit can be set accordingly according to the electrode structure on the battery cell, which is not limited here.

[0068] Furthermore, by setting the orthographic projection of the bus 130a in the first circuit 131 and the orthographic projection of the bus 130a in the second circuit 132 to at least partially overlap along the direction perpendicular to the test surface 111, the space occupied by the bus 130a in the first circuit 131 and the second circuit 132 can be reduced, and the structural layout of the conductive circuit 130 in the test board 110 is facilitated.

[0069] Specifically, Figure 7 As shown, the bus 130a in the first circuit 131 is set as a first bus 1311, and the branch line 130b in the first circuit 131 is set as a first branch line 1312. The bus 130a in the second circuit 132 is set as a second bus 1321, and the branch lines 130b in the second circuit 132 are set as a plurality of second branch lines 1322.

[0070] The first branch lines 1312 and the second branch lines 1322 are arranged alternately and spaced apart so that the first branch lines 1312 and the second branch lines 1322 correspond to the positions of the positive electrode and the negative electrode on the battery cell, thereby better meeting the testing requirements of the battery cell.

[0071] In the direction perpendicular to the test surface 111, the orthographic projection of the first bus 1311 and the orthographic projection of the second bus 1321 at least partially overlap. In this way, the interference of the first bus 1311 and the second bus 1321 on the first branch line 1312 and the second branch line 1322 can be reduced, which facilitates the structural layout of the conductive circuit 130 inside the test board 110.

[0072] In some embodiments, Figures 3 to 7As shown, the first circuit 131 includes a first bus 1311 and a plurality of first branch lines 1312. The first bus 1311 is provided in the test board 110. The plurality of first branch lines 1312 are provided on both sides of the first bus 1311 and are electrically connected to the first bus 1311. The first bus 1311 is electrically connected to the connection terminal 120. Each first branch line 1312 is connected to at least one conductive contact 140. The extension direction of the first branch line 1312 intersects with the extension direction of the first bus 1311.

[0073] In the embodiment of the present application, a plurality of first branch lines 1312 and a first bus 1311 are provided in the test board 110 to form a first circuit 131, the first branch line 1312 is electrically connected to the conductive contact 140, and the first bus 1311 is electrically connected to the connection terminal 120. Furthermore, the plurality of first branch lines 1312 and the corresponding conductive contacts 140 can be electrically connected to a plurality of electrodes on the battery cell, respectively, so that the first bus 1311 and the first branch line 1312 can be connected to the first conductive type electrode in the battery cell to transmit the electric energy output by the corresponding electrode, or supply electric energy to the corresponding electrode, so as to meet the test requirements of the battery cell.

[0074] In other embodiments, Figures 3 to 7 As shown, the second circuit 132 includes a second bus 1321 and a plurality of second branch lines 1322. The second bus 1321 is provided in the test board 110. The plurality of second branch lines 1322 are provided on both sides of the second bus 1321 and are electrically connected to the second bus 1321. The second bus 1321 is electrically connected to the connection terminal 120. Each second branch line 1322 is connected to at least one conductive contact 140. The extension direction of the second branch line 1322 intersects with the extension direction of the second bus 1321.

[0075] In the embodiment of the present application, a plurality of second branch lines 1322 and a second bus 1321 are provided in the test board 110 to form a second circuit 132, the second branch lines 1322 are electrically connected to the conductive contacts 140, and the second bus 1321 is electrically connected to the connection terminal 120. Furthermore, the plurality of second branch lines 1322 and the corresponding conductive contacts 140 can be electrically connected to a plurality of electrodes on the battery cell, respectively, so that the second bus 1321 and the second branch lines 1322 can be connected to the electrodes of the second conductivity type in the battery cell to transmit the electric energy output by the corresponding electrodes, or supply electric energy to the corresponding electrodes, so as to meet the test requirements of the battery cell.

[0076] It can be understood that the battery cell is provided with a first conductive type electrode and a second conductive type electrode, wherein the first conductive type electrode is one of a positive electrode and a negative electrode, and the second conductive type electrode is the other of a positive electrode and a negative electrode. Furthermore, the number and position of the first branch lines 1312 can be set to correspond to the number and position of the first conductive type electrodes; and the number and position of the second branch lines 1322 can be set to correspond to the number and position of the second conductive type electrodes.

[0077] Furthermore, the plurality of conductive contacts 140 may include a plurality of first contacts 141 and a plurality of second contacts 142 that are staggered from each other, wherein the first contacts 141 and the second contacts 142 are both disposed on the test surface 111, one end of the first contact 141 is electrically connected to the first branch line 1312, and the other end is exposed to the test surface 111; one end of the second contact 142 is electrically connected to the second branch line 1322, and the other end is exposed to the test surface 111, and when the battery cell is placed on the test surface 111, the first contact 141 may contact the first conductive type electrode on the battery cell, and the second contact 142 may contact the second conductive type electrode on the battery cell.

[0078] Alternatively, if Fig.11 and Fig.12 As shown, the connecting terminal 120 includes a terminal body 121, a first conductive member 122 and a second conductive member 123. The terminal body 121 is connected to the test board 110. The first conductive member 122 and the second conductive member 123 are respectively inserted into the terminal body 121. One end of the first conductive member 122 is electrically connected to the first circuit 131, one end of the second conductive member 123 is electrically connected to the second circuit 132, and the other ends of the first conductive member 122 and the second conductive member 123 are respectively used for electrical connection to the test instrument.

[0079] In the embodiment of the present application, the terminal body 121 is connected to the test board 110, and the first conductive member 122 and the second conductive member 123 are embedded in the terminal body 121. The first conductive member 122 is electrically connected to the first circuit 131, and the second conductive member 123 is electrically connected to the second circuit 132. Through the first conductive member 122 and the second conductive member 123, the first circuit 131 and the second circuit 132 can be connected to different connection ends of the test instrument, which is convenient for actual operation.

[0080] Specifically, the terminal body 121 can be made of insulating material, and the first conductive part 122 and the second conductive part 123 can be made of conductive material. The first conductive part 122 and the second conductive part 123 are embedded in the terminal body 121, and the terminal body 121 can be used to isolate and protect the first conductive part 122 and the second conductive part 123.

[0081] Among them, one end of the first conductive member 122 close to the test board 110 is electrically connected to the first bus 1311, and one end of the first conductive member 122 away from the test board 110 is exposed to the terminal body 121, so as to be used for electrical connection with the test instrument. Correspondingly, one end of the second conductive member 123 close to the test board 110 is electrically connected to the second bus 1321, and one end of the second conductive member 123 away from the test board 110 is exposed to the terminal body 121, so as to be used for electrical connection with the test instrument.

[0082] Alternatively, if Figure 10 to Figure 11 As shown, the conductive component 50 includes a bracket 510 and a plurality of conductive springs 520 . The bracket 510 is disposed at the detection station 20 b . The conductive springs 520 are disposed on the bracket 510 . When the test board 110 is located at the detection station 20 b , the conductive springs 520 are in contact with the connection terminals 120 .

[0083] In the embodiment of the present application, by setting a plurality of conductive springs 520 on the bracket 510, when the transmission mechanism 30 drives the test board 110 to move to the detection station 20b, the connection terminal 120 and the conductive component 50 are exactly in correspondence, and the first conductive member 122 and the second conductive member 123 in the connection terminal 120 are respectively in contact with the corresponding conductive springs 520 to achieve the electrical connection between the conductive circuit 130 in the test board 110 and the conductive component 50, and then the battery cell detection operation can be performed. When the transmission mechanism 30 drives the test board 110 to move away from the detection station 20b, the connection terminal 120 is separated from the conductive spring 520, so that the connection terminal 120 in the next test board 110 is electrically connected to the conductive spring 520, the operation is simple and convenient, and automatic detection can be achieved.

[0084] Among them, the conductive spring clip 520 has both conductivity and certain elastic deformation ability. When the test board 110 moves to the detection station 20b, the connection terminal 120 on the test board 110 abuts against the conductive spring clip 520, and the conductive spring clip 520 produces a certain elastic deformation to ensure that the conductive spring clip 520 is in full contact with the connection terminal 120.

[0085] It should be noted that the conductive spring clip 520 provided on the bracket 510 can be flexibly arranged according to actual detection requirements. For example, two conductive spring clips 520 can be arranged, corresponding to the positive electrode and the negative electrode of the battery cell respectively. When the test board 110 moves to the detection station 20b, the first conductive member 122 in the connecting terminal 120 is in conductive contact with one of the conductive spring clips 520, and the second conductive member 123 in the connecting terminal 120 is in conductive contact with the other conductive spring clip 520.

[0086] Exemplarily, one conductive spring 520 can be connected to the positive electrode of the current source in the hot spot test instrument, and the other conductive spring 520 can be connected to the negative electrode of the current source in the test instrument, so that it can be applied to the hot spot test of the battery cell. Specifically, when the test board 110 carrying the battery cell moves to the detection station 20b, the battery cell is photographed once using an infrared camera, and then the hot spot test instrument energizes the conductive circuit 130 in the test board 110, and after a preset time (for example, 10-500ms), the battery cell is photographed twice using an infrared camera, and the captured images are analyzed to complete the hot spot effect test of the battery cell.

[0087] In other embodiments, the number of the conductive springs 520 on the bracket 510 can be four, and the four conductive springs 520 are arranged in sequence and at intervals. When the test board 110 moves to the detection station 20b, the first conductive member 122 in the connection terminal 120 is in conductive contact with two of the conductive springs 520, and the second conductive member 123 in the connection terminal 120 is in conductive contact with the other two conductive springs 520. When in use, the four conductive springs 520 can be respectively connected to the positive and negative poles of the current source and the positive and negative poles of the voltage source, and thus the test device of the present application can also be applied to IV testing of battery cells.

[0088] It should be noted that in actual applications, the structure and quantity of the conductive springs 520 in the conductive assembly 50 can be flexibly set according to specific test scenarios to meet different test requirements for battery cells, thereby improving the adaptability of the test device.

[0089] Alternatively, if Fig.12 As shown, a surface of the conductive spring 520 that is away from the bracket 510 is an arc surface, and the arc surface protrudes in a direction away from the bracket 510 .

[0090] In the embodiment of the present application, the side surface of the conductive spring 520 away from the bracket 510 is set as an arc surface, and the arc surface protrudes in the direction away from the bracket 510, so that when the transmission mechanism 30 drives the test board 110 to move, it is convenient for the connection terminal 120 to abut and separate from the conductive spring 520.

[0091] Alternatively, if Figure 8 and Fig.11 As shown, the testing device also includes a supporting plate 150, the supporting plate 150 is connected to the transmission mechanism 30, the testing plate 110 is mounted on the supporting plate 150, a avoidance opening 151 is provided in the supporting plate 150, the connecting terminal 120 is passed through the avoidance opening 151, and is at least partially exposed on the side of the supporting plate 150 away from the testing plate 110; a plurality of vacuum grooves 152 are provided in the supporting plate 150, the vacuum holes 112 are connected to the vacuum grooves 152, and the vacuum grooves 152 are used to connect to the vacuum pumping system to provide negative pressure to the vacuum holes 112.

[0092] In the embodiment of the present application, a support plate 150 is provided on the transmission mechanism 30, and the test board 110 is installed on the support plate 150 to support and fix the test board 110, and an escape opening 151 is provided in the support plate 150 so that the connecting terminal 120 can pass through the escape opening 151, and then the connection with the test instrument can be achieved from the side of the support plate 150 away from the test board 110.

[0093] At the same time, by providing a plurality of vacuum grooves 152 in the support plate 150, when the test plate 110 is installed on the support plate 150, the vacuum holes 112 in the test plate 110 can be connected with the vacuum grooves 152 in the support plate 150, and then the vacuum grooves 152 are connected with the vacuum pumping system, so that the vacuum pumping system can provide negative pressure to the vacuum holes 112 via the vacuum grooves 152, thereby realizing the adsorption and fixation of the battery cells.

[0094] Specifically, the test board 110 and the support board 150 can be fixed by a detachable connection method such as snap connection, plug connection, bolt connection, etc., so as to facilitate the disassembly and installation between the test board 110 and the support board 150. The connection terminal 120 is arranged through the avoidance opening 151 and at least partially exposed on the side of the support board 150 away from the test board 110. The height of the connection terminal 120 exposed on the side of the support board 150 away from the test board 110 can be set to be more than 2 mm, so as to facilitate the electrical connection between the connection terminal 120 and the test instrument.

[0095] In actual use, test boards 110 of different specifications and sizes can be provided, and during testing, the test boards 110 of corresponding specifications can be flexibly replaced according to the specifications of the battery cells to be tested, thereby improving the applicability of the test device.

[0096] Furthermore, a plurality of rows of spaced-apart vacuum grooves 152 may be provided in the support plate 150, a plurality of vacuum holes 112 penetrating in a direction perpendicular to the test surface 111 may be provided in the test plate 110, and the plurality of vacuum holes 112 are arranged in rows, and each row of vacuum holes 112 corresponds to a row of vacuum grooves 152, so that negative pressure can be provided to the vacuum holes 112 by utilizing the vacuum grooves 152.

[0097] In a specific application, the support plate 150 can be mounted and fixed on the circumferential edge of the rotating table 310. The support plate 150 and the rotating table 310 can be an integrated structure or a split structure. Then, the test board 110 is fixed to the support plate 150, and the connection terminals 120 on the test board 110 are inserted into the avoidance openings 151 in the support plate 150.

[0098] Alternatively, if Figure 1 and Fig. 9As shown, the test device further includes an image acquisition mechanism 60, which is disposed above the conductive component 50 and is used to acquire images of the battery cell on the test surface 111. Furthermore, the conductive component 50 supplies power to the electrodes of the battery cell, and the image acquisition mechanism 60 is used to acquire the hot spot image of the battery cell, so as to analyze and detect the hot spot effect of the battery cell. For example, the image acquisition mechanism 60 can be an infrared camera or an infrared camera.

[0099] Optionally, the testing instrument includes a power supply, a control unit and a data analysis unit. The conductive component 50 is connected to the power supply, and the control unit is electrically connected to the power supply, the image acquisition mechanism 60 and the data analysis unit respectively, and is used to control the power supply to energize the conductive component 50, control the image acquisition mechanism 60 to acquire the image of the battery cell, and control the data analysis unit to analyze the image of the battery cell.

[0100] In a specific application, when the test board 110 carrying the battery cell moves to the inspection station 20 b , the battery cell is electrically connected to the power source through the conductive contacts 140 , the conductive circuit 130 , the connection terminals 120 and the conductive components 50 .

[0101] Furthermore, the control unit controls the image acquisition mechanism 60 to acquire a primary image of the battery cell, and then controls the power supply to energize the battery cell. After a preset time, the control unit controls the image acquisition mechanism 60 to acquire a secondary image of the battery cell, and based on the twice acquired images, the control unit controls the data analysis unit to analyze and detect the hot spot effect of the battery cell.

[0102] Of course, the specific structure of the test instrument can be set according to the actual test scenario and is not limited here.

[0103] Optionally, the test device further includes a light source, which is disposed above the conductive component 50 and is used to irradiate light to the battery cell on the test surface 111. Then, the light source is used to irradiate light to the battery cell so that the battery cell generates a photovoltaic effect, and the current characteristics and voltage characteristics of the battery cell are detected by the test instrument. Similarly, the control unit can control the light source and the power supply to irradiate light to the battery cell and power it on, and further control the data analysis unit to analyze the test data to detect the IV characteristics of the battery cell.

[0104] Alternatively, if Figure 1 As shown, an embodiment of the present application also provides a solar cell processing system, comprising: a cell processing device and the testing device in the above embodiment; the testing device is located at a downstream workstation of the cell processing device, the cell processing device is used to process cell cells, and the testing device is used to detect cell cells processed by the cell processing device.

[0105] In an embodiment of the present application, a testing device is arranged in a production line so that the testing device is located at a downstream workstation of the battery cell processing device, and then the battery cell processing device processes and prepares the battery cells, and the testing device performs performance testing on the processed battery cells, thereby achieving online testing of the battery cells, facilitating assembly line production, and improving production efficiency and quality.

[0106] At the same time, in the test device, a transmission mechanism 30 is provided on the base 20, and the test board 110 is installed on the transmission mechanism 30. The transmission mechanism 30 can drive the test board 110 to move between the loading station 20a and the detection station 20b, and the conductive component 50 is provided at the detection station 20b. Then, at the loading station 20a, the battery cell to be tested is placed on the test surface 111 of the test board 110, and the transmission mechanism 30 is used to drive the test board 110 to move to the detection station 20b for testing, so that the connection terminal 120 on the test board 110 is in contact with the conductive component 50. In this way, the battery cell on the test board 110 can be electrically connected to the test instrument through the cooperation of the connection terminal 120 and the conductive component 50, so as to perform performance testing on the battery cell. The detection device of the present application has a simple structure, is easy to operate, and is easy to combine with production equipment, thereby realizing online detection of battery cells.

[0107] Specifically, Figure 1 As shown, the battery cell processing device may include a battery cell preparation unit, a transmission mechanism 70, and a transfer mechanism 80. The battery cell preparation unit is located at the upper station of the testing device, and the transmission mechanism 70 and the transfer mechanism 80 are located between the battery cell preparation unit and the testing device. The battery cells prepared by the battery cell preparation unit are transferred to the vicinity of the testing device via the transmission mechanism 70, and then the transfer mechanism 80 transfers the battery cells to the loading station, and then places the battery cells on the test surface 111 of the test board 110.

[0108] In addition, when the test board 110 carrying the battery cells completes the inspection, the transmission mechanism 30 drives the test board 110 to move to the unloading station, and then the transfer mechanism 80 can be used to remove the battery cells in the test board 110 so that the test board 110 can be used for the next inspection operation.

[0109] The transmission mechanism 70 may be a belt transmission mechanism, a roller transmission mechanism, etc., and the transfer mechanism 80 may be a mechanical arm, a suction cup transfer mechanism, etc.

[0110] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0111] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A solar cell testing device, characterized in that: include: Base, transmission mechanism, test plate and conductive components; The transmission mechanism is movably connected to the base, the test board is connected to the transmission mechanism, the base is provided with a loading station and a detection station, and the conductive component is provided at the detection station for connecting with a test instrument; The test board is provided with a test surface for placing battery cells, and the test board is provided with connecting terminals on a side away from the test surface, and the connecting terminals are used to electrically connect with the battery cells on the test surface; the transmission mechanism can move relative to the base to drive the test board to move between the loading station and the inspection station; when the test board is located at the inspection station, the connecting terminals are in contact with the conductive components to electrically connect the battery cells with the conductive components.

2. The solar cell testing device according to claim 1, characterized in that: The test board is provided with a conductive circuit, and the test surface is provided with a plurality of conductive contacts, which are electrically connected to the connection terminals through the conductive circuit; the test surface is also provided with a vacuum hole for adsorbing and fixing the battery cell so that the battery cell contacts the conductive contacts.

3. The solar cell testing device according to claim 2, characterized in that: The conductive circuit includes a first circuit and a second circuit, the first circuit and the second circuit are respectively arranged in the test board, the first circuit and the second circuit are insulated from each other, some of the conductive contacts are electrically connected to the first circuit, and other parts of the conductive contacts are electrically connected to the second circuit, and the first circuit and the second circuit are respectively electrically connected to the connecting terminals.

4. The solar cell testing device according to claim 3, characterized in that: The first circuit and the second circuit both include a bus and a plurality of branch lines, the bus is provided in the test board, the plurality of branch lines are provided on both sides of the bus and are electrically connected to the bus, the bus is electrically connected to the connection terminal, and each branch line is connected to at least one of the conductive contacts; The branches in the first circuit and the branches in the second circuit are arranged alternately and at intervals; And / or, along a direction perpendicular to the test surface, an orthographic projection of the bus in the first circuit at least partially overlaps with an orthographic projection of the bus in the second circuit.

5. The solar cell testing device according to claim 3, characterized in that: The connecting terminal includes a terminal body, a first conductive member and a second conductive member. The terminal body is connected to the test board. The first conductive member and the second conductive member are respectively inserted into the terminal body. One end of the first conductive member is electrically connected to the first circuit. One end of the second conductive member is electrically connected to the second circuit. The other ends of the first conductive member and the second conductive member are respectively used to be electrically connected to the test instrument.

6. The solar cell testing device according to claim 1, characterized in that: The conductive component includes a bracket and a plurality of conductive springs. The bracket is arranged at the detection station. The conductive springs are arranged on the bracket. When the test board is located at the detection station, the conductive springs are in contact with the connection terminals.

7. The solar cell testing device according to claim 6, characterized in that: A surface of the conductive spring sheet on one side away from the bracket is an arc surface, and the arc surface protrudes in a direction away from the bracket.

8. The solar cell testing device according to claim 2, characterized in that: The testing device also includes: a support plate, the support plate is connected to the transmission mechanism, the test plate is installed on the support plate, the support plate is provided with a avoidance opening, the connection terminal is passed through the avoidance opening and is at least partially exposed on a side of the support plate away from the test plate; a plurality of vacuum grooves are provided in the support plate, the vacuum holes are connected to the vacuum grooves, and the vacuum grooves are used to connect with a vacuum pumping system to provide negative pressure to the vacuum holes.

9. The solar cell testing device according to claim 1, characterized in that: The testing device further comprises an image acquisition mechanism, which is disposed above the conductive component and is used to acquire an image of the battery cell on the testing surface; And / or, the testing device further comprises a light source, which is disposed above the conductive component and is used to irradiate light to the battery cell on the testing surface.

10. The solar cell testing device according to claim 9, characterized in that: The testing instrument includes a power supply, a control unit and a data analysis unit, the conductive component is electrically connected to the power supply; the control unit is electrically connected to the power supply, the image acquisition mechanism and the data analysis unit respectively, and is used to control the power supply to energize the conductive component, control the image acquisition mechanism to acquire the image of the battery cell, and control the data analysis unit to analyze the image of the battery cell.

11. A solar cell processing system, characterized in that: include: A battery cell processing device and a testing device as described in any one of claims 1-10; the testing device is located at a downstream workstation of the battery cell of the processing device, the battery cell processing device is used to process the battery cell, and the testing device is used to detect the battery cell processed by the processing device.

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