A structure for fixing battery pieces in a carrier plate frame and a carrier plate device
Patent Information
- Application Number
- CN202521361724.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-30
- Publication Date
- 2026-09-15
- Estimated Expiration
- 2035-06-30
AI Technical Summary
在加工过程中因设备振动，电池片易产生随机位移，操作时需人工目视检查电池片位置，偏移时须中断上料，使用吸笔手动调整，由于加工过程中难以避免的电池片偏移情况，在磷扩散阶段背面与载板间容易产生间隙，导致磷烷气体绕扩至正面边缘，经EL测试显示漏电不良率高达8-12%，此外，下料过程依赖机械手强行抓取偏移电池片，也会造成约2%的碎片率
本实用新型通过在载板框的边框内设置具有活塞和弹性件的腔室，并利用气压作用使活塞带动固定件伸缩，从而实现对电池片的固定与释放，这种结构设计不仅能够有效防止电池片在载板框内因抖动而移位，避免了因电池片移位导致的漏电问题，提高了电池片的生产质量和可靠性，而且通过弹性件的复位功能，在固定电池片时无需持续抽真空，有效减少了能耗，降低了生产成本，同时提高了固定效率和操作的便捷性，通过对电池片在载板框内的良好定位，解决了电池片移位导致的绕扩问题。
Smart Images
Figure CN224760572U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of battery manufacturing, and specifically discloses a structure and carrier device for fixing battery cells in a carrier frame. Background Technology
[0002] In the production of Topcon solar cells, the preparation of the back tunneling oxide layer and phosphorus doping are key process steps. Currently, these processes mainly employ two methods: tubular PECVD and plate PVD. While tubular PECVD can achieve high-quality thin film deposition, it suffers from phosphorus diffusion problems, where phosphorus diffuses into non-target areas of the solar cell, necessitating an additional de-diffusion process. This not only increases production costs but also extends the production cycle. While plate PVD addresses the phosphorus diffusion problem to some extent, in practical applications, the carrier plate can still vibrate during entry into the cavity due to equipment vibration or improper operation, causing the solar cell to shift on the carrier plate. This shift creates gaps between the solar cell and the carrier plate. In subsequent phosphorus diffusion processes, phosphine gas may diffuse through these gaps to the front of the solar cell, resulting in leakage at the front edge. This leakage not only reduces the electrical performance of the solar cell but can also lead to its scrapping, severely impacting production efficiency and product quality.
[0003] Traditional POA (Poly-on-Chip) carrier boards employ an open frame design. After the solar cells are placed on the carrier board, they simply lie flat under gravity, with a 1mm wide limiting flange on the inner side of the frame for passive positioning. During processing, equipment vibration can easily cause random displacement of the solar cells. This requires manual visual inspection of the cell positions, and if displacement occurs, feeding must be interrupted, and manual adjustment using a suction pen is necessary. Due to the unavoidable cell displacement during processing, gaps can easily form between the back side and the carrier board during the phosphorus diffusion stage, causing phosphine gas to diffuse to the front edge. EL testing shows a leakage defect rate as high as 8-12%. Furthermore, the unloading process relies on a robotic arm to forcibly grasp displaced solar cells, resulting in a breakage rate of approximately 2%. Therefore, how to effectively fix the solar cells and prevent them from shifting within the carrier board frame is a pressing technical problem that needs to be solved. Utility Model Content
[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a structure and carrier device for fixing the battery cells in the carrier frame.
[0005] On the one hand, this utility model discloses a structure for fixing battery cells inside a carrier frame, which adopts the following technical solution: A structure for fixing solar cells within a carrier frame includes a carrier frame having a solar cell placement area and a frame surrounding the solar cell placement area. At least one chamber is provided within the frame, with an opening on the side of the chamber facing the solar cell placement area. A piston and an elastic element are provided within the chamber. One end of the piston is connected to the inner wall of the chamber and faces the opening. The other end of the piston is provided with a fixing element. The piston and the chamber form a sealed space. The sealed space has an air pipe interface for connecting to an external air extraction device. The piston moves under air pressure, causing the fixing element to extend and retract towards the opening. The fixing element extends into the solar cell placement area when the elastic element is not subjected to external force.
[0006] Preferably, the carrier frame includes multiple unit frames arranged in a horizontal row, and each unit frame includes the battery cell placement area and a border surrounding the battery cell placement area. Preferably, the chambers of adjacent unit frames are connected by airways, and several interconnected unit frames share the same airway interface.
[0007] Preferably, the fixing member includes a connecting rod and a locking point, the connecting rod connecting the locking point to the piston, and the locking point being used to hold the battery cell.
[0008] Preferably, the locking point is hemispherical.
[0009] Preferably, the frame is a rectangular frame, and at least two opposite corners of the four sides of the rectangular frame are provided with a cavity.
[0010] On the other hand, this utility model discloses a carrier plate device, which includes the above-mentioned structure for fixing the battery cells inside the carrier plate frame.
[0011] Compared with the prior art, the present invention has at least the following beneficial effects: This invention utilizes a chamber with a piston and elastic element within the frame of the carrier plate frame. Air pressure causes the piston to extend and retract, thereby fixing and releasing the battery cells. This structural design effectively prevents the battery cells from shifting within the carrier plate frame due to vibration, avoiding leakage problems caused by cell displacement and improving the production quality and reliability of the battery cells. Furthermore, the reset function of the elastic element eliminates the need for continuous vacuuming during cell fixing, effectively reducing energy consumption and production costs. It also improves fixing efficiency and ease of operation. The precise positioning of the battery cells within the carrier plate frame solves the problem of cell displacement and subsequent expansion. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the structure of the present invention for fixing the battery cells inside the carrier frame; Figure 2 This is a schematic diagram of the unit frame structure for fixing the battery cells inside the carrier plate frame according to this utility model; Figure 3 This is a schematic diagram of the vacuum state for fixing the battery cells inside the carrier plate frame according to this utility model. Figure 4 This is a schematic diagram of the vacuum removal state of the battery cells in the frame for fixing the carrier plate according to this utility model.
[0013] Explanation of icon numbers: 1. Carrier frame; 11. Cell placement area; 12. Frame; 121. Chamber; 122. Opening; 123. Air pipe interface; 13. Airway; 2. Spring; 3. Piston; 4. Connecting rod; 5. Locking point. Detailed Implementation
[0014] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0015] This embodiment discloses a structure for fixing battery cells within a carrier frame, referring to... Figure 1-4 It includes a carrier frame 1, which has a battery cell placement area 11 and a frame 12 surrounding the battery cell placement area 11. The frame 12 has at least one chamber 121. The side of the chamber 121 facing the battery cell placement area has an opening 122. The chamber 121 has a piston 3 and an elastic element. The elastic element can be a spring 2. The spring 2 connects one end of the piston 3 to the inner wall of the chamber 121 and faces the opening 122. The other end of the piston 3 has a fixing element. The piston 3 and the chamber 121 form a closed space. The closed space has an air pipe interface 123 for connecting to an external air extraction device. The piston 3 moves under air pressure and drives the fixing element to extend and retract toward the opening 122. The fixing element extends to the battery cell placement area 11 when the spring 2 is not subjected to external force. By adopting the above structure, the solar cells can be effectively fixed, preventing them from shifting within the carrier frame 1. This avoids leakage problems caused by solar cell displacement, improving the production quality and efficiency of the solar cells. Furthermore, this solution utilizes the sealing properties of the piston and the resilience of the elastic element to fix the solar cells under the force of the elastic element. The solar cells do not require continuous vacuuming during fixing, thus effectively reducing energy consumption. Compared to the adsorption fixing method that relies on direct vacuuming, this solution's vacuuming combined with mechanical fixing method provides better fixing effect, avoiding the problem of adsorption fixing failure due to the uneven surface smoothness of the solar cells. This improves fixing efficiency and reliability, providing an energy-saving and efficient solution for the stable fixing of solar cells.
[0016] As a preferred embodiment, the fixing component includes a connecting rod 4 and a locking point 5. The connecting rod 4 connects the locking point 5 to the piston 3, and the locking point 5 is used to hold the battery cell. The movement of the piston 3 can be accurately transmitted to the locking point 5 through the connecting rod 4, realizing the extension and retraction of the locking point 5, thereby achieving the fixing and release of the battery cell. Specifically, the locking point 5 is preferably hemispherical in shape. The hemispherical locking point has good contact performance, can better fit with the surface of the battery cell, reduce contact stress, avoid damage to the battery cell, and can provide a more uniform fixing force when holding the battery cell, further improving the fixing effect.
[0017] As a preferred embodiment, the frame 12 is a rectangular frame, with a cavity 121 located at least two opposite corners of the four sides. Providing cavities 121 at the four corners of the rectangular frame fully utilizes the space of the carrier frame 1, allowing the fasteners to secure the battery cells from multiple directions, thus improving the stability of the fixation. (Refer to...) Figure 2 In this embodiment, each unit frame has a chamber 121 at two opposite corners, which provides good stability for holding and fixing the battery cells. In other embodiments, the chamber 121 can also be provided at all four corners.
[0018] As a preferred embodiment, the carrier frame 1 includes multiple unit frames arranged in a horizontal row, each unit frame including a cell placement area 11 and a border 12 surrounding the cell placement area 11. By setting multiple unit frames, multiple cells can be fixed simultaneously, improving production efficiency.
[0019] As a preferred embodiment, the chambers 121 of adjacent unit frames are connected via airways 13 (see...). Figure 1 (The dotted lines indicate this). Several interconnected unit frames of chambers 121 share the same tracheal inlet 123. By adopting the above scheme, the evacuation device can simultaneously evacuate multiple chambers 121, simplifying the operation process and improving work efficiency. Sharing the same tracheal inlet 123 reduces the number of inlets, lowers production costs and maintenance difficulty, and also facilitates unified evacuation of all chambers 121 within the entire carrier frame 1, improving the convenience and reliability of operation.
[0020] The working principle of the structure for fixing the battery cells in the carrier frame is as follows: First, connect each air pipe interface 123 of the carrier frame 1 to the external air extraction device (such as a vacuum pump) of the loading area using connecting pipes. Before loading, evacuate the chamber 121, and drive the piston 3 to the bottom of the chamber 121. Refer to... Figure 3 At this time, spring 2 is in a compressed state to facilitate the placement of the solar cells in the solar cell placement area 11 of each unit frame of the carrier plate frame 1. After the solar cells are loaded, the vacuum pump stops running, and the connecting pipe is removed to release the vacuum, causing spring 2 to return to its initial length. At the same time, the drive point 5 pops out, as shown in the figure. Figure 4 At this point, the clamping point 5 extends to the cell placement area 11 and stops above the cell, pressing and holding it in place. When the carrier frame 1 reaches the unloading area, the air pipe interface 123 of the carrier frame 1 is connected to the vacuum pump in the unloading area using a connecting pipe. The vacuum pump is started to create a vacuum during unloading, and the clamping point 5 is retracted to unload the cells. After the mechanical suction cup has unloaded the cells, the vacuuming is stopped, allowing the carrier frame 1 to enter the next production cycle.
[0021] Example 2 This embodiment discloses a carrier plate device, including the structure of Embodiment 1 for fixing the battery cells inside the carrier plate frame.
[0022] The technical solution provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.
Claims
1. A structure for fixing a cell sheet in a carrier plate frame, characterized by, The device includes a carrier frame, which has a cell placement area and a frame surrounding the cell placement area. The frame has at least one chamber with an opening on the side facing the cell placement area. The chamber contains a piston and an elastic element. One end of the piston is connected to the inner wall of the chamber and faces the opening. The other end of the piston is fixed. The piston and the chamber form a sealed space. The sealed space has an air pipe interface for connecting to an external air extraction device. The piston moves under air pressure and drives the fixed element to extend and retract toward the opening. The fixed element extends to the cell placement area when the elastic element is not subjected to external force.
2. The structure for fixing the battery sheet in the carrier frame according to claim 1, wherein, The carrier frame includes multiple unit frames arranged in a horizontal row, and each unit frame includes a cell placement area and a border surrounding the cell placement area.
3. The structure for fixing the battery sheet in the carrier frame according to claim 2, wherein, The chambers of adjacent unit frames are connected by airways, and several interconnected unit frames share the same airway interface.
4. The structure for fixing the battery sheet in the frame of the carrier plate according to claim 1, wherein, The fastener includes a connecting rod and a locking point. The connecting rod connects the locking point to the piston, and the locking point is used to hold the battery cell.
5. The structure for fixing the battery sheet in the frame of the carrier plate according to claim 4, wherein, The checkpoint is hemispherical.
6. The structure for fixing the battery pieces in the frame of the carrier plate according to claim 1, wherein, The frame is a rectangular frame, and at least two opposite corners of the four sides of the rectangular frame are provided with a cavity.
7. A carrier plate device, characterized by Includes the structure for fixing the battery cells within the carrier frame as described in any one of claims 1-6.