Battery piece laser strengthening equipment

Abstract

The utility model belongs to the technical field of photovoltaic equipment, and particularly relates to battery piece laser strengthening equipment. The battery piece laser strengthening equipment comprises a conveying line used for conveying battery pieces; the loading and unloading mechanism is arranged between the conveying lines and is used for loading and unloading the battery pieces on the conveying lines; the rotary table is arranged on one side of the feeding and discharging mechanism of the conveying line and used for driving the battery pieces to flow among the feeding and discharging position, the detection position, the laser strengthening position and the waste discharging position. And the laser strengthening device is arranged at the laser strengthening position on one side of the rotary table. According to the battery piece laser strengthening equipment, the battery pieces are conveyed through the conveying line, the feeding and discharging mechanism can feed the battery pieces on the conveying line to the rotary table, the rotary table conveys the battery pieces to the laser strengthening position, laser strengthening is carried out through the laser strengthening device, battery grid lines and the batteries can form good ohmic contact, and the battery pieces can be effectively strengthened. Therefore, the resistivity between the semiconductor and the electrode is reduced, and the performance of the solar cell can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of photovoltaic equipment, and specifically relates to a battery sheet laser strengthening device. Background Art

[0002] The production process of solar cells is divided into silicon wafer inspection-surface texturing and pickling-diffusion bonding-dephosphorized silicon glass-plasma etching and pickling-anti-reflection film coating-screen printing-fast sintering, etc. However, after sintering, the cell produced by photovoltaic equipment currently has a large area of ​​​​the front passivation layer of the cell damaged, the ohmic contact between the grid line and the cell is not good, and the cell efficiency is lost.

[0003] Solar cell grid line laser shock strengthening is a method that uses high-intensity laser to impact the front of the solar cell to form a good ohmic contact between the cell grid line and the cell (also known as metallization), thereby reducing the resistivity between the semiconductor and the electrode, which can improve the performance of the solar cell. The high-intensity laser quickly scans the solar cell, and the semiconductor material generates carriers after absorbing light energy. Under the action of the externally applied deflection voltage, a huge amount of carriers flow to the cell grid line, generating resistance heating in the place where the ohmic contact between the grid line and the cell is poor, reducing the contact resistance between the grid line and the semiconductor, thereby achieving the purpose of improving the overall performance of the solar cell.

[0004] Therefore, a cell laser strengthening device is needed. Utility Model Content

[0005] The utility model aims to provide a battery sheet laser strengthening device for laser strengthening of battery sheets.

[0006] The present application provides a battery cell laser strengthening device, comprising: a conveyor line for conveying battery cells; a loading and unloading mechanism, arranged between the conveyor lines, for loading and unloading battery cells on the conveyor lines; a turntable, arranged on one side of the loading and unloading mechanism of the conveyor line, for driving the battery cells to flow between loading and unloading positions, a detection position, a laser strengthening position and a waste material unloading position; and a laser strengthening device, arranged at the laser strengthening position located on one side of the turntable, for laser strengthening the battery cells.

[0007] In one embodiment of the present application, the laser strengthening device includes: at least one voltage applying mechanism arranged at the laser strengthening position, and a laser scanning device; wherein the voltage applying mechanism includes: a lifting plate, which is driven to rise and fall by the lifting mechanism; and two oppositely arranged electrode assemblies, which are used to apply voltage to the battery cell on the turntable.

[0008] In one embodiment of the present application, the electrode assembly includes: a downward pressure cylinder installed on a lifting plate; a transverse movement cylinder installed at the lower end of the downward pressure cylinder; an electrode mounting plate installed on the driving rod of the transverse movement cylinder; wherein a plurality of first electrodes and a plurality of second electrodes are arranged on the electrode mounting plate, the first electrodes are used to contact the grid lines on the battery cell, and the second electrodes are used to contact the conductive jig supporting the battery cell.

[0009] In one embodiment of the present application, the conveyor line includes a loading conveyor assembly and a unloading conveyor assembly; the loading and unloading mechanism is arranged between the loading and unloading conveyor assembly and the unloading conveyor assembly; the loading and unloading mechanism includes: a transverse movement device, which is arranged along the conveying direction of the conveyor line; a transverse movement plate, which is installed on the transverse movement device, and a first material picking device is arranged at both ends.

[0010] In one embodiment of the present application, a visual detection mechanism is provided at the detection position.

[0011] In one embodiment of the present application, the waste unloading position is provided with a waste unloading mechanism; the waste unloading mechanism includes: a moving device; a second material picking device, which is arranged on the moving device; and a waste storage seat, which is arranged on one side of the turntable and is used to store the waste transported by the second material picking device.

[0012] In one embodiment of the present application, the cell laser strengthening equipment also includes an emergency loading and unloading device arranged on one side of the conveyor line; the emergency loading and unloading device includes: a longitudinal moving device, extending horizontally perpendicular to the conveyor line; a third material picking device, arranged on the longitudinal moving device; and an emergency material storage seat for storing emergency unloading materials.

[0013] In one embodiment of the present application, the emergency material storage seat is installed on a slide rail.

[0014] In one embodiment of the present application, the emergency loading and unloading device also includes an emergency loading seat arranged between the conveyor line and the emergency storage seat, which is used to store the battery cells to be loaded.

[0015] In one embodiment of the present application, jig assemblies are provided on the front, rear, left and right sides of the turntable, and each jig assembly includes two conductive jigs.

[0016] The beneficial effect of the utility model is that the battery cell laser strengthening equipment of the utility model conveys the battery cells through the conveyor line, the loading and unloading mechanism can load the battery cells on the conveyor line to the turntable, the turntable conveys the battery cells to the laser strengthening position, and the laser strengthening device performs laser strengthening, which can make the battery grid line and the battery form a good ohmic contact (also called metallization), thereby reducing the resistivity between the semiconductor and the electrode, and improving the performance of the solar cell.

[0017] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by practicing the utility model. The purpose and other advantages of the utility model are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a three-dimensional diagram of a cell laser strengthening device according to a preferred embodiment of the utility model;

[0021] Figure 2 This is a top view of a cell laser strengthening device according to a preferred embodiment of the utility model with the laser scanning device hidden;

[0022] Figure 3 This is a partial stereogram of a cell laser strengthening device according to a preferred embodiment of the utility model;

[0023] Figure 4 It is a three-dimensional diagram of a voltage applying mechanism of a preferred embodiment of the utility model;

[0024] Figure 5 yes Figure 4 Enlarged view of point A in the middle;

[0025] Figure 6 It is a stereoscopic diagram of an emergency loading and unloading device according to a preferred embodiment of the utility model.

[0026] In the figure:

[0027] Conveyor line 1, loading and unloading conveying assembly 11, unloading and unloading conveying assembly 12, loading and unloading mechanism 2, transverse movement device 21, transverse movement plate 22, first material picking device 23, turntable 3, fixture assembly 31, conductive fixture 311, laser strengthening device 4, voltage application mechanism 41, lifting plate 411, lifting mechanism 412, electrode assembly 413, downward pressure cylinder 4131, transverse movement cylinder 4132, electrode mounting plate 4133, first electrode 4134, second electrode 4135, laser scanning device 42, visual inspection mechanism 5, waste unloading mechanism 6, moving device 61, second material picking device 62, waste storage seat 63, emergency loading and unloading device 7, longitudinal moving device 71, third material picking device 72, emergency material storage seat 73, slide rail 74, emergency loading seat 75. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] The present application provides a cell laser strengthening device, which is described in detail below. It should be noted that the description order of the following embodiments does not limit the preferred order of the embodiments of the present application. In the following embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0030] See also Figure 1 and Figure 2 In one embodiment, the battery cell laser strengthening equipment is characterized in that it includes: a conveyor line 1 for conveying battery cells; a loading and unloading mechanism 2, which is arranged between the conveyor lines 1 and is used to load and unload the battery cells on the conveyor line 1; a turntable 3, which is arranged on one side of the loading and unloading mechanism 2 of the conveyor line 1 and is used to drive the battery cells to flow between the loading and unloading positions, the detection position, the laser strengthening position and the waste unloading position; and a laser strengthening device 4, which is arranged at the laser strengthening position located on one side of the turntable 3 and is used to perform laser strengthening on the battery cells.

[0031] Specifically, the turntable 3 can pass through the upper and lower material positions, the detection position, the laser strengthening position and the waste material unloading position in sequence after one rotation. After the battery cells are loaded onto the turntable 3 by the upper and lower material positions through the loading and unloading mechanism 2, the turntable 3 rotates, and the battery cells are detected at the detection position in sequence and then enter the laser strengthening position for laser strengthening, then go to the waste material unloading position, and finally go to the upper and lower material positions for unloading.

[0032] Optional, see Figure 3The front, rear, left and right sides of the turntable 3 are provided with fixture assemblies 31, each fixture assembly includes two conductive fixtures 311; each workstation can operate two battery cells at the same time, thereby improving production efficiency.

[0033] See also Figure 3 Optionally, the laser strengthening device 4 includes: at least one voltage applying mechanism 41 arranged at the laser strengthening position, and a laser scanning device 42; wherein the voltage applying mechanism 41 includes: a lifting plate 411, which is driven to rise and fall by a lifting mechanism 412; and two oppositely arranged electrode assemblies 413, which are used to apply voltage to the battery cell on the turntable 3.

[0034] In this embodiment, there may be two voltage applying mechanisms 41 , one for each corresponding conductive fixture 311 .

[0035] In one application scenario, since the electrode assembly 413 will block the laser, after an electrode assembly 413 applies voltage to the battery cell, the laser scanning device 42 only scans the half surface of the battery cell that is not blocked by the electrode assembly 413 each time; after scanning half of the surface, another electrode assembly 413 is replaced to apply voltage, and the laser scanning device 42 scans the other half of the surface.

[0036] See also Figure 4 and Figure 5 Optionally, the electrode assembly 413 includes: a downward pressure cylinder 4131, installed on the lifting plate 411; a transverse movement cylinder 4132, installed at the lower end of the downward pressure cylinder 4131; an electrode mounting plate 4133, installed on the driving rod of the transverse movement cylinder 4132; wherein the electrode mounting plate 4133 is provided with a plurality of first electrodes 4134 and a plurality of second electrodes 4135, the first electrodes 4134 are used to contact the grid lines on the battery cells, and the second electrodes 4135 are used to contact the conductive jig 311 that carries the battery cells.

[0037] Optionally, the first electrodes 4134 may be arranged in a linear array along the electrode mounting plate 4133 , that is, in a linear array along the gate lines, which may improve the uniformity of contact with the gate lines.

[0038] See also Figure 3 In order to better arrange the conveyor line, the conveyor line 1 includes a loading conveying component 11 and a unloading conveying component 12; the loading and unloading mechanism 2 is arranged between the loading and unloading conveying component 11 and the unloading conveying component 12; the loading and unloading mechanism 2 includes: a transverse movement device 21, which is arranged along the conveying direction of the conveyor line 1; a transverse movement plate 22, which is installed on the transverse movement device 21, and a first material picking device 23 is arranged at both ends thereof.

[0039] Specifically, the loading and unloading mechanism 2 grabs the battery cells on the loading conveying assembly 11 and at the same time grabs the battery cells on the jig assembly 31 at the upper and lower material positions, and then after conveying them into place, the battery cells are placed on the jig assembly 31 at the upper and lower material positions and the unloading conveying assembly 12 at the same time; in addition, two first material picking devices 23 can be set at each end of the transverse plate 22.

[0040] See also Figure 2 A visual inspection mechanism 5 is provided at the inspection position; the visual inspection mechanism 5 may be but is not limited to a CCD, and may detect whether the battery cell is missing a corner, whether it is placed in place, etc.; and the inspection result is transmitted to the control module; when a problematic battery is detected, the control module may mark the battery cell, and when the battery cell is transported to the laser strengthening position, the control module may control the laser strengthening device not to strengthen it; when the battery cell is transported to the waste unloading position, the control module may control the waste unloading mechanism 6 to unload the cell.

[0041] See also Figure 3 The waste unloading position is provided with a waste unloading mechanism 6; the waste unloading mechanism 6 comprises: a moving device 61; a second material taking device 62, which is arranged on the moving device 61; and a waste storage seat 63, which is arranged on one side of the turntable 3 and is used to store the waste transported by the second material taking device 62.

[0042] In some application scenarios, the incoming material end of the conveyor line 1 can be connected to the sintering furnace. Since the battery cells must be transported out of the sintering furnace after sintering, the conveyor line 1 must receive the sintered battery cells. However, when problems occur in the subsequent devices and equipment of the conveyor line 1, emergency unloading is required. In this embodiment, preferably, see Figure 1 , Figure 2 and Figure 6 As shown, the cell laser strengthening equipment also includes an emergency loading and unloading device 7 arranged on one side of the conveyor line 1; the emergency loading and unloading device 7 includes: a longitudinal moving device 71, extending horizontally perpendicular to the conveyor line 1; a third material picking device 72, arranged on the longitudinal moving device 71; and an emergency material storage seat 73 for storing emergency unloading materials.

[0043] In this embodiment, preferably, the emergency material storage seat 73 is installed on a slide rail 74; the emergency material storage seat 73 can be pulled out from the chassis along the slide rail 74 to facilitate manual transportation.

[0044] In this embodiment, preferably, the emergency loading and unloading device 7 further includes an emergency loading seat 75 disposed between the conveyor line 1 and the emergency storage seat 73 for storing battery cells to be loaded.

[0045] Specifically, after the emergency unloading is completed, the battery cells in the emergency storage seat 73 can be placed on the emergency loading seat 75 for the third material taking device 72 to grab.

[0046] In this embodiment, the first material picking device 23, the second material picking device 62, and the third material picking device 72 can be, but are not limited to, suction cup assemblies.

[0047] In summary, the cell laser strengthening device of the utility model can realize laser strengthening of the cell, so that the cell grid line and the battery form a good ohmic contact (also known as metallization), thereby reducing the resistivity between the semiconductor and the electrode, and improving the performance of the solar cell.

[0048] It should be noted that the various devices selected in this application (components whose specific structures are not described) are all universal standard parts or components known to technical personnel in this field, and their structures and principles can be known to technical personnel through technical manuals or through conventional experimental methods.

[0049] In the description of the embodiments of the present invention, 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 the present invention can be understood according to specific circumstances.

[0050] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0051] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A cell laser strengthening device, characterized in that: include: Conveyor line, used to convey battery cells; The loading and unloading mechanism is arranged between the conveyor lines and is used to load and unload the battery cells on the conveyor lines; A turntable is provided on one side of the unloading and loading mechanism of the conveyor line, and is used to drive the battery cells to flow between the unloading and loading positions, the detection position, the laser strengthening position and the waste unloading position; and The laser strengthening device is arranged at the laser strengthening position located on one side of the turntable and is used for laser strengthening the battery sheet.

2. The cell laser strengthening equipment according to claim 1, characterized in that: The laser strengthening device comprises: at least one voltage applying mechanism arranged at the laser strengthening position, and a laser scanning device; wherein The voltage applying mechanism comprises: A lifting plate, driven to rise and fall by a lifting mechanism; Two electrode assemblies arranged opposite to each other are used to apply voltage to the battery cells on the turntable.

3. The cell laser strengthening equipment according to claim 2, characterized in that: The electrode assembly comprises: A downward pressure cylinder is mounted on the lifting plate; The traverse cylinder is installed at the lower end of the downward pressure cylinder; The electrode mounting plate is mounted on the driving rod of the traverse cylinder; The electrode mounting plate is provided with a plurality of first electrodes and a plurality of second electrodes, wherein the first electrodes are used to contact the grid lines on the battery cells, and the second electrodes are used to contact the conductive fixture that carries the battery cells.

4. The cell laser strengthening equipment according to claim 1, characterized in that: The conveying line includes a loading conveying assembly and a unloading conveying assembly; The loading and unloading mechanism is arranged between the loading and unloading conveying assembly and the unloading and unloading conveying assembly; The loading and unloading mechanism comprises: A transverse moving device is arranged along the conveying direction of the conveying line; The transverse moving plate is installed on the transverse moving device, and the first material taking device is arranged at both ends of the transverse moving plate.

5. The cell laser strengthening equipment according to claim 1, characterized in that: A visual detection mechanism is arranged at the detection position.

6. The cell laser strengthening equipment according to claim 1, characterized in that: The waste material unloading position is provided with a waste material unloading mechanism; The waste material unloading mechanism comprises: Mobile devices; A second material taking device, disposed on the moving device; and The waste storage seat is arranged on one side of the turntable and is used for storing the waste transported by the second material taking device.

7. The cell laser strengthening equipment according to claim 1, characterized in that: The cell laser strengthening equipment also includes an emergency loading and unloading device arranged on one side of the conveyor line; The emergency loading and unloading device comprises: A longitudinal moving device extending horizontally perpendicular to the conveying line; A third material taking device is arranged on the longitudinal moving device; Emergency material storage seat, used to store emergency materials.

8. The cell laser strengthening equipment according to claim 7, characterized in that: The emergency material storage seat is installed on a slide rail.

9. The cell laser strengthening equipment according to claim 7, characterized in that: The emergency loading and unloading device also includes an emergency loading seat arranged between the conveyor line and the emergency storage seat, which is used to store the battery cells to be loaded.

10. The cell laser strengthening equipment according to claim 1, characterized in that: The front, rear, left and right sides of the turntable are all provided with jig assemblies, and each jig assembly includes two conductive jigs.

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