Solar cell module with integrated optimizer

Abstract

The invention discloses a solar cell module with an integrated optimizer. The solar cell module comprises a front face packaging glass layer, a front face EVA (Ethylene Vinyl Acetate) layer, battery pieces, a rear face EVA layer, a rear plate and the optimizer which are superposed in sequence, wherein the optimizer is connected with battery clusters in parallel; the solar cell module is composed of a plurality of battery clusters which are connected transversely and vertically in series; each battery cluster is composed of the plurality of battery pieces. When one or more battery pieces in one battery cluster of the module are shielded or damaged, the integrated optimizer can be used for adjusting current and voltage of the battery cluster so that the current of the battery cluster is the same as that of the other battery clusters; on one hand, the influences on normally-working battery clusters by the battery clusters with problems are avoided and the output power of the assembly is improved, on the other hand, the current of the battery clusters with the problems is the same as that of the other battery clusters, no current mismatch is caused and a hot spot phenomenon is effectively prevented from occurring.

Description

[0001] technical field [0002] The invention relates to a solar cell assembly, in particular to a solar cell assembly with an integrated optimizer. Background technique [0003] In the process of photovoltaic power generation, when one or more cells of a solar cell module are shaded or damaged, the output performance of the entire module and even the entire photovoltaic system will decline. Therefore, how to effectively reduce the impact of shading or local cell damage on the module and the entire system The impact of output performance is particularly important. [0004] In order to achieve a certain voltage and current, the solar cells are usually connected in series inside the module, and the modules in the photovoltaic system will also be connected in series in a certain number. When one or more cells in the module are blocked or damaged When the operating current exceeds the short-circuit current of the battery or battery pack, hot spot heating will occur on the compo...

AI Technical Summary

Problems solved by technology

[0004] In order to achieve a certain voltage and current, the solar cells are usually connected in series inside the module, and the modules in the photovoltaic system will also be connected in series in a certain number. When one or more cells in the module are blocked or damaged When the operating current exceeds the short-circuit current of the battery or battery pack, hot spot heating will occur on the components. At this time, the affected battery or battery pack is in a reverse bias state, consuming power, causing overheating and generating heat Hot spot phenomenon, the harm of hot spot is huge, and the hot spot effect is very easy to occur when the module array power station is unmanned, so it is urgent to find a way to avoid or reduce the adverse effect of hot spot on the module, usually This is achieved by connecting bypass diodes in parallel on the component battery strings, so that when one or a group of batteries is shaded or damaged, the bypass diodes start to work, bypassing the string where the shaded or damaged batteries are located, so that Although the hot spot effect is alleviated, the battery string where the problematic battery is located is bypassed and has no power output, resulting in power loss of the entire string of batteries and reducing the power generation performance of the entire system. It is easy to heat up and cause component failure, which reduces the reliability of the system

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