Battery piece repairing device and repairing system
The graphite plate is heated by a magnetic field generated by electromagnetic coils, combined with the method of protecting gas flow, and the problems of low heating efficiency and unevenness in battery cell repair are solved, and efficient repair and reuse of battery cells are achieved.
Patent Information
- Application Number
- CN202422448240.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-10
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-10-10
AI Technical Summary
There are problems of low heating efficiency and uneven heating during the repair of existing battery cells, especially silicon wafer repairs containing oxygen and phosphorus atoms.
The electromagnetic coil is used to generate a magnetic field to heat up the collision of atoms in the graphite plate, and heat is transferred to the cell through the graphite plate, combining the flow of protective gas to remove oxygen and phosphorus atoms, and non-contact heating and protective gas protection is used.
It realizes uniform heating and effective repair of the battery cells, improves the repair efficiency, and ensures the quality of the battery cells reuse.
Smart Images
Figure CN223182579U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of battery chip repair, in particular to a battery chip repair device and a repair system. Background Art
[0002] In the process of battery chip production, silicon wafers are an important component. Although silicon wafers are produced through consistent parameters, it is impossible to ensure that each silicon wafer is a qualified product. During the production process, the incorporation of oxygen atoms or phosphorus atoms into silicon wafers is an important reason for silicon wafers to be unqualified. For unqualified silicon wafers, manufacturers often carry out repair. The existing repair is often carried out by resistance heating, which has problems such as low heating efficiency and uneven heat reception. Content of the Utility Model
[0003] In view of this, the utility model provides a battery chip repair device to solve the problems of low heating efficiency and uneven heat reception that exist when repairing existing silicon wafers containing oxygen atoms and phosphorus atoms, which are often carried out by resistance heating.
[0004] In the first aspect, the utility model provides a battery chip repair device, including:
[0005] A sealed housing, the sealed housing is provided with a receiving space, and a protective gas flows in the receiving space;
[0006] A heating component, the heating component includes an electromagnetic coil and a graphite plate. The electromagnetic coil is arranged below the sealed housing, and the graphite plate is arranged in the receiving space. The electromagnetic coil is adapted to be connected to a power supply line. The upper part of the graphite plate is adapted to place the battery chip to be repaired. The electromagnetic coil is arranged below the graphite plate. After the electromagnetic coil is energized, a magnetic field is generated, so that the atoms in the graphite plate collide in the magnetic field and heat up, and the heat generated by the graphite plate is transferred to the battery chip to be repaired.
[0007] The graphite plate transfers heat to the battery chip to be repaired, so that oxygen atoms and phosphorus atoms in the battery chip to be repaired escape from the silicon wafer, and then the battery chip to be repaired is repaired for further use.
[0008] In an optional embodiment, the sealed housing is provided with a receiving shell, and an air inlet pipe and an air outlet pipe are arranged on the side plate of the receiving shell, and a protective gas flows through the air inlet pipe and the air outlet pipe.
[0009] By arranging the air inlet pipe and the air outlet pipe, the protective gas flows in the receiving shell. On the one hand, the protective gas protects the battery chip to be repaired when heated in the receiving shell. On the other hand, the protective gas takes away the escaped oxygen atoms and phosphorus atoms to ensure the use environment in the receiving space.
[0010] In an alternative embodiment, the intake pipe and the outlet pipe are provided on two corresponding side plates of the accommodation shell.
[0011] In an alternative embodiment, it further includes a cover plate for closing the accommodation shell, and an accommodation space is formed between the cover plate and the accommodation shell.
[0012] In an alternative embodiment, it further includes a temperature detector passing through the side plate of the accommodation shell.
[0013] In an alternative embodiment, it further includes two support frames respectively provided on both sides of the accommodation shell.
[0014] In an alternative embodiment, it further includes a bottom plate, and an electromagnetic coil is fixed on the upper surface of the bottom plate.
[0015] In an alternative embodiment, the bottom plate is provided with a fixing portion, and the electromagnetic coil is fixedly arranged on the fixing portion.
[0016] In a second aspect, the present utility model further provides a solar cell repair system, including the above-mentioned solar cell repair device.
[0017] In an alternative embodiment, it further includes a robotic arm and a detection device, and the detection device is arranged upstream of the solar cell repair device. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0019] Figure 1 Schematic diagram of a solar cell repair device according to an embodiment of the present utility model;
[0020] Figure 2 For Figure 1 Top view of the shown solar cell repair device;
[0021] Figure 3 For Figure 2 Cross-sectional view taken along line A-A in
[0022] Description of reference numerals: 1, sealed housing; 101, receiving housing; 102, cover plate; 103, sealing ring; 2, support frame; 3, heating assembly; 301, electromagnetic coil; 3011, connection end; 302, graphite plate; 4, bottom plate; 401, fixing portion; 402, supporting portion; 5, intake pipe; 6, outlet pipe; 7, temperature detector. Detailed implementation manners
[0023] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.
[0024] The following combines Figures 1 to 3 , and describes the embodiments of the present utility model.
[0025] According to an embodiment of the present utility model, on the one hand, a battery cell repair device is provided, including: a sealed housing 1, the sealed housing 1 is provided with a receiving space, and a protective gas flows in the receiving space;
[0026] A heating assembly 3, including an electromagnetic coil 301 and a graphite plate 302, the electromagnetic coil 301 is arranged below the sealed housing 1, the graphite plate 302 is arranged in the receiving space, the electromagnetic coil 301 is adapted to be connected to a power supply line, the upper part of the graphite plate 302 is adapted to place a battery cell to be repaired, the electromagnetic coil 301 is arranged below the graphite plate 302, after the electromagnetic coil 301 is energized, a magnetic field is generated, so that atoms in the graphite plate 302 collide in the magnetic field and heat up, and the heat generated by the graphite plate 302 is transferred to the battery cell to be repaired.
[0027] The graphite plate 302 transfers heat to the silicon wafer of the battery cell to be repaired, so that oxygen atoms and phosphorus atoms in the battery cell to be repaired escape from the silicon wafer, and then the battery cell to be repaired is repaired for further use, realizing the recycling and reuse of the battery cell.
[0028] As Figure 1 , Figure 2 and Figure 3 shown, in one embodiment, the sealed housing 1 is provided with a receiving housing 101, and an intake pipe 5 and an outlet pipe 6 are arranged on the side plate of the receiving housing 101, and a protective gas flows in the intake pipe 5 and the outlet pipe 6.
[0029] In this embodiment, by providing an intake pipe 5 and an outlet pipe 6, the protective gas flows inside the housing 101. On the one hand, the protective gas protects the battery to be repaired when heated inside the housing 101. On the other hand, the protective gas carries away the escaped oxygen atoms and phosphorus atoms to ensure the use environment inside the accommodation space. It should be noted that the protective gas is nitrogen.
[0030] As Figure 1 , Figure 2 and Figure 3 shown, in one embodiment, the intake pipe 5 and the outlet pipe 6 are provided on two corresponding side plates of the housing 101 so that the protective gas fills every corner inside the accommodation space and the protective gas can flow everywhere.
[0031] As Figure 1 , Figure 2 and Figure 3 shown, in one embodiment, it further includes a cover plate 102. The cover plate 102 closes the housing 101, and an accommodation space is formed between the cover plate 102 and the housing 101.
[0032] In this embodiment, through the cooperation of the cover plate 102 and the housing 101, a sealed accommodation space is formed to repair the battery sheet to be repaired in the accommodation space and also prevent external gas from entering the accommodation space. As Figure 3 shown, a sealing ring 103 is further provided between the cover plate 102 and the housing 101 to further enhance the sealing performance of the sealed housing 1.
[0033] As Figure 2 shown, in one embodiment, it further includes a temperature detector 7. The temperature detector 7 is provided through the side plate of the housing 101. By the temperature detector 7, the temperature inside the accommodation space and the temperature of the battery sheet to be repaired are measured in real time to ensure the accuracy of internal temperature control. Specifically, the temperature detector 7 is a non-contact thermocouple. As Figure 2 shown, the temperature detector 7 is arranged on the same side as the outlet pipe 6 to more accurately measure the temperature change inside the accommodation space.
[0034] As Figure 1 , Figure 2 and Figure 3 shown, in one embodiment, it further includes a support frame 2. The number of the support frames 2 is two, and the two support frames 2 are respectively arranged on both sides of the housing 101.
[0035] As Figure 1 , Figure 2 and Figure 3 shown, in one embodiment, it further includes a bottom plate 4. An electromagnetic coil 301 is fixed on the upper surface of the bottom plate 4 to support and fix the electromagnetic coil 301.
[0036] As Figure 1, Figure 2 and Figure 3 As shown in Figure 3 , in one embodiment, the bottom plate 4 is provided with a fixing portion 401, and the electromagnetic coil 301 is fixedly arranged on the fixing portion 401. The fixing portion 401 fixes the electromagnetic coil 301 and plays a fixing role. As Figure 3 shown, the bottom plate 4 is further provided with a supporting portion 402. The bottom surface of the supporting portion 402 contacts the tabletop, and the supporting portion 402 and the fixing portion 401 are detachably connected by means of clamping, threaded connection, etc. It should be noted that the supporting portion 402 and the fixing portion 401 are made of the same material, which is an adiabatic non-magnetic material (such as ceramics, etc.). As Figure 1 , Figure 3 shown, the support frame 2 is fixedly connected to the bottom plate 4 and the accommodation shell 101 respectively to support the accommodation shell 101. As Figure 1 , Figure 3 shown, there is a gap between the bottom surface of the accommodation shell 101 and the surface of the bottom plate 4 to prevent the accommodation shell 101 from directly placing on the bottom plate 4 and damaging the electromagnetic coil 301. It should be noted that several battery wafers to be repaired can be placed on the graphite plate 302 in this embodiment to improve the repair efficiency. As Figure 1 shown, the electromagnetic coil 301 includes two connection ends 3011, and the two connection ends 3011 are respectively connected to the positive electrode and the negative electrode of the power supply.
[0037] According to an embodiment of the present invention, on the other hand, a battery wafer repair system is further provided, which includes the above-mentioned battery wafer repair device, and also includes a robotic arm and a detection device. The detection device is arranged upstream of the battery wafer repair device. In this implementation, the robotic arm is arranged between the detection device and the battery wafer repair device to place the detected battery wafers to be repaired into the battery wafer repair device for repair. To achieve automatic control, a controller is further included, and the controller is respectively connected to the temperature detector 7, the robotic arm and other circuits.
[0038] A method for using a battery wafer repair system includes the following steps:
[0039] 1) The detection device uses the image taken by an infrared camera with a resolution of 1k for detection, and the controller determines whether there are defects in the battery wafers to be repaired. The defects are as follows: misaligned wire walking, concentric circles, PL value, impurities (oxygen and phosphorus), etc. Standard engineering detection is used to ensure the quality of detection. The missed detection rate of this detection device is ≤0.5%, and the false detection rate is ≤5% (excluding interference sheets (foam, dirt, stacked sheets)), and the equipment power is 1.5kw;
[0040] 2) The battery wafers to be repaired are sorted out by the robotic arm, and the selected battery wafers to be repaired are placed on the graphite plate 302;
[0041] 3) After waiting for the battery wafers to cover the graphite plate 302, cover the cover plate 102, and introduce high-purity nitrogen gas through the air inlet pipe 5 to fill the nitrogen gas in the closed space. After the electromagnetic coil 301 located below the housing 101 is energized, a magnetic field is generated, and an induced current is generated in the graphite plate 302. The induced current causes the graphite to rapidly heat up to 650 °C in a short time. The temperature detector 7 is used to detect whether the temperature rises to 650 °C. Maintain 650 °C for one minute. During the heat preservation process, the silicon wafers are transferred to the silicon wafers of the battery to be repaired through the graphite plate 302. Keep the temperature for a certain period of time to allow oxygen atoms and phosphorus atoms to escape from the silicon wafers.
[0042] The battery wafer repair device and repair system provided by the present invention have the following advantages: (1) The electromagnetic coil 301 realizes non-contact with the graphite plate 302, avoiding damage to the electromagnetic coil 301; (2) Since the magnetic field generated by the electromagnetic coil 301 is relatively uniform, the heat generated by the graphite plate 302 is relatively uniform, making the overall repair condition of the battery wafers to be repaired good.
[0043] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations fall within the scope defined by the appended claims.
Claims
1. A solar cell repair device, characterized in that Comprising: A sealed housing (1) provided with a receiving space in which a protective gas flows. A heating assembly (3) comprising an electromagnetic coil (301) and a graphite plate (302). The electromagnetic coil (301) is provided below the sealed housing (1), and the graphite plate (302) is disposed within the receiving space. The electromagnetic coil (301) is adapted to be connected to a power line, and the upper surface of the graphite plate (302) is adapted to place the battery cell to be repaired. The electromagnetic coil (301) is disposed below the graphite plate (302). When the electromagnetic coil (301) is energized, a magnetic field is generated, causing the atoms in the graphite plate (302) to collide in the magnetic field and heat up, and the heat generated by the graphite plate (302) is transferred to the battery cell to be repaired.
2. The solar cell repair device according to claim 1, wherein The sealed housing (1) is provided with a receiving shell (101), and the side plates of the receiving shell (101) are provided with an air inlet pipe (5) and an air outlet pipe (6) through which a protective gas flows.
3. The cell repair device according to claim 2, characterized in that, The air inlet pipe (5) and the air outlet pipe (6) are disposed on two corresponding side plates of the receiving shell (101).
4. The solar cell repair device according to claim 1, wherein It further includes a cover plate (102) for closing the receiving shell (101), and a receiving space is formed between the cover plate (102) and the receiving shell (101).
5. The cell repair device according to claim 2, characterized in that It further includes a temperature detector (7) passing through the side plate of the receiving shell (101).
6. The solar cell repair device according to claim 2, characterized in that, It further includes two support frames (2) respectively disposed on both sides of the receiving shell (101).
7. The solar cell repair device according to claim 6, wherein It further includes a bottom plate (4) having an electromagnetic coil (301) fixed on its upper surface.
8. The cell repair device according to claim 7, wherein, The bottom plate (4) is provided with a fixing portion (401), and the electromagnetic coil (301) is fixedly disposed on the fixing portion (401).
9. A solar cell repair system, characterized in that, A battery cell repair device according to any one of claims 1 - 8.
10. The cell repair system according to claim 9, wherein, It further includes a robotic arm and a detection device, and the detection device is disposed upstream of the battery cell repair device.