BC battery sector rises against the trend, the future star of the photovoltaic field

     1. What is BC battery?     

                  BC cell, also known as "full back electrode contact (full back electrode contact) crystalline silicon photovoltaic cell", is a solar

cell technology aimed at improving the efficiency and performance of photovoltaic cells. Traditional crystalline silicon

photovoltaic cells typically have one or more metal electrodes (usually silver) on the front of the cell to collect current. These

electrodes partially block light, thereby reducing the absorption efficiency of the photovoltaic cel

    The full back electrode contact crystalline silicon photovoltaic cell adopts different design methods. Its electrodes are located

on the back of the battery, which means that the front is completely exposed to sunlight, improving the efficiency of light

absorption. This design can also reduce the path of current transmission, lower resistance, and improve battery performance.

    The specific implementation of this technology may vary depending on the manufacturer and the type of photovoltaic cell, but

the overall goal is to maximize the energy conversion efficiency of photovoltaic cells. This type of photovoltaic cell is commonly

used in high-performance applications such as solar panels and solar cell packs to achieve more electricity output within a limited

area.

2. Unique structure of BC battery

     The mainstream photovoltaic technologies currently on the market include PERC, TOPCon, and HJT.

          The efficiency of PERC cells is approaching its limit, and the rate of cost reduction is slowing down. The industry is gradually shifting its focus to other technologies.

　　Among numerous new technologies, BC batteries stand out with their unique structure and advantages.

    1. Overview of BC Battery Industry

     Since its introduction in 1975, the concept of back contact (BC) has been widely recognized as the main pathway for efficient

photovoltaic cell technology through continuous evolution and improvement. Its main advantage lies in improving the

conversion efficiency of light, as the front of the BC structure is not obstructed by grid lines, thereby increasing the light

receiving area and improving the utilization of incident light. This has enabled BC to maintain a significant advantage in

conversion efficiency over the past 50 years.

     In addition, BC structural components can also be colored, making them more suitable for diverse building scenarios, especially

for photovoltaic building integration (BIPV), with good application prospects.

     2. Analysis of the Competitive Landscape and Leading Companies in the BC Battery Market

     In 2004, SunPower announced for the first time the production of large-area (149 cm2) high-efficiency (21.5%) IBC

(Interdigited Back Contact) batteries.

     In 2022, Aixu Corporation will be the world's first to launch ABC (Allback contact) battery modules.

     In September 2023, Longi Green Energy announced that a large number of its products will move towards the BC battery

technology route. It is expected that BC batteries will become the absolute mainstream of crystalline silicon batteries in the

next 5 to 6 years.

     The photovoltaic industry is in a period of rapid development and transformation, and BC cells, as an emerging technological

force, are expected to accelerate the development of the industry in the future.

     As a platform based technology, BC technology has superior extensibility, and its combination with BC technology is also one

of the paths for TOPCon and HJT to improve efficiency. These technologies are expected to be further integrated to form TBC

and HBC batteries, and are expected to continue to develop towards perovskite stack technology.

     Overall, the application and extension space of BC technology is very broad, and leading enterprises that take the lead in

layout will have strong competitive barriers. With the gradual expansion of BC battery production, the industry is expected to

usher in a new round of development opportunities.

     3. BC equipment manufacturer - Zhongbu Qingtian New Energy

     Zhongbu Qingtian New Energy (Hubei) Co., Ltd. is a high-tech company in the new energy industry, located in the beautiful

city of Wuhan. The company relies on technical and talent support from institutions such as Wuhan University and Hubei

University of Technology, focusing on the research and development, production, and sales of photovoltaic module equipment,

as well as investment, construction, and operation of distributed photovoltaic power stations. The company team has been

deeply involved in the photovoltaic industry for more than ten years, with a production base of 10000 square meters in Wuhan,

Hubei and Changzhou, Jiangsu, and a complete sales and service network in China and overseas. We can provide global

customers with specialized services such as targeted research and development customization of photovoltaic module

equipment, turnkey projects for photovoltaic module production lines, and investment, construction, and operation of

photovoltaic power stations.

　     The company adheres to the corporate spirit of "Chinese standards, steady and honest steps, pioneering technology, and hard work rewarded by heaven", helps achieve the country's "dual carbon goals", and injects green technology momentum into the global development of new energy.