Efficient battery piece structure
By adopting a cell design with an oblique overlap structure in photovoltaic modules, and using welding ribbons to connect the front and back main grid lines of adjacent cells, the gap between cells is eliminated, thereby improving the photoelectric conversion efficiency and output power of the photovoltaic module.
Patent Information
- Application Number
- CN202422349007.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-26
- Publication Date
- 2025-09-05
- Estimated Expiration
- 2034-09-26
AI Technical Summary
The gaps between cells in traditional photovoltaic modules are large, resulting in low utilization of the light-receiving area of the module, affecting conversion efficiency.
The battery cell design adopts an inclined overlap structure, and the front main grid lines of adjacent battery cells are connected to the back main grid lines through welding ribbons. The welding ribbons are located between the overlapping inclined surfaces of adjacent battery cells and are tightly attached to the battery cells on both sides to eliminate the gap between the battery cells.
Make full use of the light-receiving area of the component, improve the photoelectric conversion efficiency, and output higher power.
Smart Images
Figure CN223310204U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of photovoltaic power generation, in particular to a high-efficiency battery cell structure. Background Art
[0002] High-efficiency photovoltaic modules have always been the direction of photovoltaic workers' efforts. How to reduce module costs, improve photoelectric conversion efficiency and reduce module packaging losses are the keys to achieving grid parity on the power generation side.
[0003] The gaps between the cells of traditional photovoltaic modules occupy the light-receiving area of the module. The internal cell welding is done by connecting two adjacent cells with tin-coated copper strips. The welding strips connecting the two cells need to be bent into a Z shape to connect the positive and negative poles of the two cells. Since the welding strips are bent into a Z shape, a spacing of 2-4 mm must be maintained between the two cells.
[0004] If the traditional photovoltaic module connection method with large gaps between cells is solved, so that there is no gap between the front and rear cells, the limited light-receiving area of the module can be fully utilized to output higher power, which can significantly improve the conversion efficiency of the module. Utility Model Content
[0005] The main purpose of the present invention is to provide a high-efficiency battery cell structure so as to effectively solve the problems raised in the background technology.
[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical solutions: a high-efficiency battery cell structure, including battery cells, a front EVA protective layer, a front main grid line, a back EVA protective layer, a back main grid line, and a welding strip; the battery cells are multiple, and when they are grouped in series, the adjacent battery cells are in a bevel overlap structure in the thickness direction, and each battery cell is provided with a front main grid line and a front EVA protective layer from bottom to top on the front side, and a back main grid line and a back EVA protective layer on the back side from top to bottom on the back side. There are multiple front main grid lines and back main grid lines on each battery cell, which are evenly arranged according to the power generation amount; the welding strip connects the front main grid line of the first battery cell with the back main grid line of the adjacent second battery cell, and then connects the front main grid line of the second battery cell with the back main grid line of the adjacent third battery cell, and so on, to connect all the battery cells in series, and the welding strip is located between the overlapping bevels of adjacent battery cells and is tightly attached to the battery cells on both sides.
[0007] Preferably, the angle between the overlapping inclined surface of the battery cell and the bottom surface of the battery cell is 5°-45°.
[0008] Preferably, the angle between the overlapping inclined surface and the bottom surface of the battery cell is 135°-175°.
[0009] Preferably, when the battery cells are connected in series, the inner sides of the first cell and the last cell are inclined structures, and the outer sides are right-angle structures.
[0010] The beneficial effects of the present invention are as follows: the welding strip is located between the overlapping inclined surfaces of adjacent battery cells and is tightly attached to the battery cells on both sides, eliminating the gap between the battery cells, making full use of the limited light-receiving area on the component, outputting higher power, and significantly improving the conversion efficiency of the component. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Attachment Figure 1 Schematic diagram of the structure of embodiment 1 of the present invention.
[0012] Attachment Figure 2 Schematic diagram of the structure of embodiment 2 of the present utility model.
[0013] Attachment Figure 3 Schematic diagram of the high-efficiency battery string structure of the utility model.
[0014] Attachment Figure 1 —3, the first battery cell 1, the front EVA protective layer 101, the front main grid line 102, the back EVA protective layer 103, the back main grid line 104, the second battery cell 2, the third battery cell 3, and the welding ribbon 4. DETAILED DESCRIPTION
[0015] The following will combine the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.
[0016] Attachment Figure 1 —3, the front sides of the first battery cell 1, the second battery cell 2, and the third battery cell 3 are all provided with front main grid lines 102 and front EVA protective layers 101, and the back sides are all provided with back main grid lines 104 and back EVA protective layers 103. The adjacent battery cells are in a bevel overlap structure in the thickness direction. There are multiple front main grid lines 102 and back main grid lines 104 on each battery cell, which are evenly arranged according to the current carrying capacity and charge collection efficiency; the welding ribbon 4 connects the front main grid line 102 of the first battery cell 1 with the back main grid line 104 of the adjacent second battery cell 2, and then connects the front main grid line 102 of the second battery cell 2 with the back main grid line 104 of the adjacent third battery cell 3, and so on. All battery cells are connected in series, and the welding ribbon 4 is located between the overlapping bevels of adjacent battery cells and is tightly attached to the battery cells on both sides.
[0017] Preferably, the angle between the overlapping slope of the battery cell and the bottom surface of the battery cell is 5°-45°, see the attached Figure 1 .
[0018] Preferably, the angle between the overlapping slope and the bottom surface of the battery cell is 135°-175°, see the attached Figure 2 .
[0019] Preferably, when the battery cells are connected in series, the inner sides of the first cell and the last cell are inclined structures, and the outer sides are right-angle structures.
[0020] The welding strip 4 is located between the overlapping inclined surfaces of adjacent battery cells and is tightly attached to the battery cells on both sides, eliminating the gap between the battery cells, making full use of the limited light-receiving area on the component, outputting higher power, and significantly improving the conversion efficiency of the component.
[0021] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A high-efficiency battery cell structure, characterized by: It includes battery cells, a front EVA protective layer, a front main grid line, a back EVA protective layer, a back main grid line, and a welding strip; the battery cells are multiple, and when they are grouped in series, adjacent battery cells have an inclined overlap structure in the thickness direction, and each battery cell is provided with a front main grid line and a front EVA protective layer from bottom to top on the front side, and a back main grid line and a back EVA protective layer on the back side from top to bottom on the back side. There are multiple front main grid lines and back main grid lines on each battery cell, which are evenly arranged according to the current carrying capacity and charge collection efficiency; the welding strip connects the front main grid line of the first battery cell with the back main grid line of the adjacent second battery cell, and then connects the front main grid line of the second battery cell with the back main grid line of the adjacent third battery cell, and so on, to connect all the battery cells in series, and the welding strip is located between the overlapping inclined surfaces of adjacent battery cells and is tightly attached to the battery cells on both sides.
2. The high-efficiency battery cell structure according to claim 1, characterized in that: The angle between the overlapping inclined surface of the battery cell and the bottom surface of the battery cell is 5°-45°.
3. The high-efficiency battery cell structure according to claim 1, characterized in that: The angle between the overlapping inclined surface and the bottom surface of the battery cell is 135°-175°.
4. The high-efficiency battery cell structure according to claim 1, characterized in that: When the battery cells are connected in series, the inner sides of the first cell and the last cell are inclined structures, and the outer sides are right-angle structures.