1.0 Introduction A solar cell is a semiconductor device that converts solar energy into electrical energy. The grid line is an important part of the battery. It is responsible for directing the photocurrent in the battery cell to the outside of the battery. Prior to the development of solar cells, grid lines are always designed in advance to create a reticle for the grid lines. The dimensions of the grid lines are based on pre-set cell parameters (open circuit voltage V oc, short-circuit current density Jsc, and maximum operating point output voltage V). m and output current density Jm etc.) are designed. Whether the grid line design is excellent or not has a great influence on the cell. Currently, there are several popular grid line optimization schemes in the field of solar cells, and it is necessary to study and discuss. 2.0 cell grid line design principles The power loss of the battery is mainly affected by the diffused sheet resistance, the metal semiconductor contact resistance, and the resistance of the gate line itself, resulting in power loss and reducing the output power. In addition, the shading loss of the gate lines also directly reduces the photocurrent output. The design of the cell grid lines is based on the following principles: 1. How to reduce the reflection and transmission loss of incident light. 2. How are the photo-generated carriers collected by the PN junction as much as possible? First, the photocurrent is the largest and the dark current is the smallest. 3. The power loss is small and the cost is relatively low. The design of the gate line structure is good because the series resistance of the battery is small, so that the power loss is small and the output power is large, which is particularly important for a single area solar cell with large area power output. 3.0 The difference between three grids and two grids 1, from the cost: two grid can save costs. The slurry increased by the three grids increases production costs. 2, from the performance point of view: Three-grid battery slice to delete the line current collection effect is good, the series resistance is small and the power loss is lower than the two grid, made out of the component power attenuation and stable. 3, from the production point of view: Three grid string welding is more straight, the connection strength is large, in the lamination of the film and film is not easy to shift, but the artificial man-hour increase in the welding process is easy fragmentation. 4, from the cutting point of view: Three-grid is not a simple increase, along with the three-gate is appropriate to increase the number of fine cut and reduce the width, with higher resistance, three grid lines are not easy to cut, easy to cause debris, production capacity It will also be reduced appropriately. 5. The appearance is different. The solar cell manufacturing process is consistent. 4.0 Conclusion Three grid cell advantages: 1. The series resistance is lower than that of the two grids; 2. The resulting power decay of the component is slow and less than the two gates and is stable. The disadvantages are: 1. The increase of grid lines will also reduce the lighting area of ​​the panel accordingly; 2. While the price of the gate line is high, increasing the gate line will also increase the cost of the product. 3. Three grids use more ribbons and waste time. This is entirely determined by the area of ​​the battery, the collection efficiency, and the production cost. It is worthwhile to make a three-grid line of 156*156 cells. A 125*125 cell is not necessary. (The author WeChat public account: Photovoltaic experience network) Electric Actuator EA23 is switch type 90° Rotary Electric Actuator, we offer size 03, 05 and 10 with torque 25NM, 50NM and 100NM. EA32 electric actuator is suitable for Ball Valve, Butterfly Valve with ISO 5211 standard direct mounting. plastic shell with light of weight and good for chemical resistance. Electric Actuator Electric Actuator,Valve Actuator,Electric Motor,Rotary Electric Actuator,Electric Actuator 220V,Electric Actuator 24V Ningbo RMI Plastic Co., Ltd. , https://www.rmiplast.com