Laser-induced sintering battery piece device

Abstract

The utility model relates to the technical field of battery pieces, in particular to a laser-induced battery piece sintering device which comprises a platform used for placing battery pieces, and a laser emitting device is arranged above the platform. The laser emitting device comprises a laser device, the laser device is communicated with a light splitting mechanism, the light splitting mechanism is used for carrying out light splitting operation on laser emitted by the laser device, and the light emitting end of the light splitting mechanism is located above the face, where the battery piece is placed, of the platform. The laser emitted by the laser device is subjected to light splitting operation through the light splitting mechanism, and the incident laser is distributed into multiple beams of emergent light, so that one laser device can process multiple areas at the same time, the production efficiency is effectively improved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery cells, in particular to a laser induced sintering battery cell device. Background Art

[0002] With the continuous progress and innovation of photovoltaic technology, laser-assisted sintering (LECO) technology is also developing continuously. Compared with traditional sintering methods, it has obvious efficiency advantages and is becoming an important efficiency-enhancing technology direction that is indispensable for the industrialization of N-type batteries. In order to meet increasingly high quality standards and production needs, various companies have frequently launched new LECO equipment in recent years, constantly exploring the limits of efficiency optimization, quality improvement and efficiency increase. Laser enhanced contact optimization technology mainly uses laser scanning on the front grid line part of the battery, which locally causes very high charge carrier injection. At the same time, a bias voltage is applied to the contacts of the battery. High injection and bias voltage lead to high current density through the contact interface, thereby forming contact.

[0003] The existing LECO equipment on the market all use Gaussian beams or flat-top beams. The energy distribution of Gaussian beams is relatively uneven. If the energy in the middle is too high, it will cause the local temperature to be too high, thus affecting the interaction between the laser and the material. The energy on the two wings is too low, which reduces the utilization rate. In addition, Gaussian beams have high requirements for processing position accuracy, which increases the difficulty of debugging. Flat-top beams can use energy more effectively, but the debugging of the optical path is relatively difficult, requiring high-precision optical components and accurate control of the holographic effect, which increases the difficulty of product development, debugging and cost. The laser optical path uses a single beam optical path, which has low processing efficiency and can only process one battery cell at a time. It is impossible to achieve multi-channel or multi-task parallel processing, which affects the overall processing efficiency. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a laser induced sintering battery cell device.

[0005] The technical solution adopted by the utility model to solve the technical problem is as follows: the laser induced sintering cell device comprises a platform for placing the cell, and a laser emitting device is arranged above the platform;

[0006] The laser emitting device comprises a laser, which is connected to a light splitting mechanism for performing light splitting operation on the laser emitted by the laser, and a light emitting end of the light splitting mechanism is located above the side of the platform where the battery sheet is placed.

[0007] The present application sets up a method of first splitting the laser light emitted by the laser through a splitting mechanism, and then splitting the incident laser light into N outgoing light beams. The beam diameter, divergence angle and wavefront quality of the outgoing light beam are exactly the same as those of the incident laser light, but the propagation direction is changed. Thus, one laser device can process multiple areas at the same time, effectively improving production efficiency and reducing production costs.

[0008] The light splitting mechanism comprises a beam shaping element and a light splitting optical element which are sequentially arranged on a side of the beam expander away from the laser;

[0009] It also includes a galvanometer, wherein the galvanometer is connected to the field mirror;

[0010] After being emitted from the light splitting optical element, the light is reflected by the reflection mechanism and enters the galvanometer;

[0011] The light beam emitting end of the field mirror is arranged toward the side of the platform where the battery sheet is placed.

[0012] The beam shaping element includes an optical element that shapes the shape and size of a single laser spot, and also includes an optical element that shapes the array split beam spot.

[0013] The optical components for light splitting include but are not limited to various optical lenses or optical beam splitters for energy splitting. A laser beam can be split into multiple beams for output. The output beams can be arranged in a one-dimensional or two-dimensional shape. The beam diameter and wavefront phase of each beam are consistent with the incident original beam. The splitting angle and splitting energy can also be selected according to actual needs.

[0014] The reflection mechanism comprises two reflecting mirrors arranged opposite to each other, wherein one reflecting mirror is arranged corresponding to the light splitting optical element, and the other reflecting mirror is arranged corresponding to the galvanometer mirror. The light beam split by the light splitting optical element is reflected to the galvanometer mirror through the reflection mechanism and emitted from the field mirror.

[0015] The beam expander, the beam shaping element and the beam splitting optical element are all fixedly arranged in an optical path housing, and the optical path housing is connected to the light emitting end of the laser through a light pipe.

[0016] A collimator is arranged between the laser and the beam expander. The laser beam emitted by the laser is collimated by the collimator and then expanded by the beam expander. The expanded beam is spot-shaped by the beam shaping element and then divided into multiple outgoing beams by the beam splitting optical element.

[0017] The beam shaping element is a shaping mirror.

[0018] The light splitting optical element is a beam splitter.

[0019] The laser is one of a gas laser, a solid laser, a semiconductor laser, a fiber laser, a liquid laser, a pulse laser, a quasi-continuous laser and a continuous laser.

[0020] Compared with the prior art, the utility model has the following beneficial effects:

[0021] 1. This application shapes the laser spot shape to improve the utilization rate of the laser beam and avoid unnecessary energy loss. At the same time, the spot can be adjusted according to different welding requirements, and the ratio of its major axis to minor axis can be customized and optimized according to specific applications, which can effectively reduce the occlusion ratio of the laser by the grid line;

[0022] 2. Compared with a single-beam optical path, beam splitting by a beam splitter enables one laser processing device to process multiple areas at the same time, which can simplify the processing process and greatly improve the processing efficiency of battery components. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the utility model;

[0024] Figure 2 Schematic diagram of the laser light path;

[0025] Figure 3 It is a side view of the utility model.

[0026] In the figure: 1. battery cell; 2. platform; 3. laser; 4. spectrometer; 401. beam expander; 402. beam shaping element; 403. spectrometer optical element; 404. galvanometer; 405. field mirror; 406. reflector; 407. optical path housing; 5. light pipe. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only 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.

[0028] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] Reference Figure 1-Figure 3The laser induced sintering cell device comprises a platform 2 for placing the cell 1, and a laser emitting device is arranged above the platform 2;

[0030] The laser emitting device comprises a laser 3, and the laser 3 is connected to a light splitting mechanism 4, and the light splitting mechanism 4 is used to perform light splitting operation on the laser emitted by the laser 3, and the light output end of the light splitting mechanism 4 is located above the side of the platform 2 where the battery sheet is placed.

[0031] The light splitting mechanism 4 comprises a beam shaping element 402 and a light splitting optical element 403 which are sequentially arranged on a side of a beam expander 401 away from the laser 3;

[0032] It also includes a galvanometer 404, wherein the galvanometer 404 is connected to the field lens 405;

[0033] The light is emitted from the light splitting optical element 403 and enters the galvanometer 404 through the reflection mechanism;

[0034] The light emitting end of the field lens 405 is arranged toward the side of the platform 2 where the solar cells are placed.

[0035] The beam shaping element 402 includes an optical element for shaping the shape and size of a single laser spot, and also includes an optical element for shaping the array split beam spot.

[0036] The light-splitting optical element 403 includes but is not limited to various energy-splitting optical lenses or optical beam splitters. A laser beam can be split into multiple beams for output, and the output beams can be arranged in a one-dimensional or two-dimensional shape. The beam diameter and wavefront phase of each beam are consistent with the incident original beam, and the light-splitting angle and light-splitting energy can also be selected according to actual needs.

[0037] In this embodiment, the beam shaping element 402 is a shaping mirror. The beam splitting optical element 403 is a beam splitter. The light emitted by the laser 3 is shaped by the beam shaping element 402 and then split by the beam splitting optical element 403.

[0038] The reflection mechanism includes two reflecting mirrors 406 arranged opposite to each other, wherein one reflecting mirror 406 is arranged corresponding to the beam splitting optical element 403, and the other reflecting mirror 406 is arranged corresponding to the galvanometer 404. The light beam split by the beam splitting optical element 403 is reflected to the galvanometer 404 through the reflection mechanism and emitted from the field lens 405. The angle of the reflecting mirror 406 is adjusted and determined according to the actual position of the beam splitter and the galvanometer 404, and is used to reflect the light beam split by the beam splitter to the galvanometer 404.

[0039] The beam expander 401 , the beam shaping element 402 and the beam splitting optical element 403 are all fixedly disposed in an optical path housing 407 , and the optical path housing 407 is connected to the light emitting end of the laser 3 through a light pipe 5 .

[0040] A collimator is provided between the laser 3 and the beam expander 401. The laser beam emitted by the laser 3 is collimated by the collimator and then expanded by the beam expander 401. The expanded beam is spot-shaped by the beam shaping element 402 and then split into multiple outgoing beams by the beam splitting optical element 403.

[0041] The laser 3 is one of a gas laser, a solid laser, a semiconductor laser, a fiber laser, a liquid laser, a pulse laser, a quasi-continuous laser and a continuous laser.

[0042] Description of the optical path: In the present application, the laser generated by the laser 3 is collimated by a collimator and expanded by a beam expander 401, and then the emitted laser beam is spot-shaped and split by a beam shaping element 402 and a beam splitting optical element 403. Each split beam is reflected by a reflection mechanism into a galvanometer 404, and then focused by a field lens 405 and emitted onto the battery cell of the platform 2, thereby realizing the laser scanning operation of the battery cell.

[0043] The above description is only an optional embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A laser induced sintering cell device, comprising a platform (2) for placing a cell (1), characterized in that: A laser emitting device is arranged above the platform (2); The laser emitting device comprises a laser (3), the laser (3) being connected to a light splitting mechanism (4), the light splitting mechanism (4) being used to perform light splitting operations on laser light emitted by the laser (3), and the light output end of the light splitting mechanism (4) being located above a side of the platform (2) on which the battery cells are placed.

2. The laser induced sintering cell device according to claim 1, characterized in that: The light splitting mechanism (4) comprises a beam shaping element (402) and a light splitting optical element (403) which are arranged in sequence on a side of the beam expander (401) away from the laser (3); It also includes a galvanometer (404), wherein the galvanometer (404) is connected to the field mirror (405); After being emitted from the light splitting optical element (403), the light is reflected by a reflection mechanism and enters a galvanometer (404); The light beam emitting end of the field lens (405) is arranged toward a side of the platform (2) on which the battery sheet is placed.

3. The laser induced sintering cell device according to claim 2, characterized in that: The reflection mechanism comprises two reflecting mirrors (406) arranged opposite to each other, wherein one of the reflecting mirrors (406) is arranged corresponding to the light splitting optical element (403), and the other reflecting mirror (406) is arranged corresponding to the galvanometer mirror (404).

4. The laser induced sintering cell device according to claim 3, characterized in that: The beam expander (401), the beam shaping element (402) and the beam splitting optical element (403) are all fixedly arranged in an optical path housing (407), and the optical path housing (407) is connected to the light-emitting end of the laser (3) through a light pipe (5).

5. The laser induced sintering cell device according to claim 3, characterized in that: A collimator is provided between the laser (3) and the beam expander (401).

6. The laser induced sintering cell device according to claim 2, characterized in that: The beam shaping element (402) is a shaping mirror.

7. The laser induced sintering cell device according to claim 2, characterized in that: The light splitting optical element (403) is a light splitter.

8. The laser induced sintering cell device according to claim 1, characterized in that: The laser (3) is one of a gas laser, a solid laser, a semiconductor laser, a fiber laser, a liquid laser, a pulse laser, a quasi-continuous laser and a continuous laser.

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