Tianneng battery and Chaowei can be regarded as China's two largest battery manufacturers, together occupy nearly ninety percent of China's electric bicycle battery market, the two also originated in Changxing County, Huzhou, Zhejiang, the early two fierce competition, in the later stage to expand the market to buy each other's shares, since then tied to each other. Tianneng has a layout in lead-acid batteries and lithium battery product lines, but lead-acid batteries account for a larger proportion, according to the 2018 Tianneng financial report, the lead-acid battery business accounts for 85.70% of its revenue.
In the lead-acid battery product line, Tianneng has multiple series of products: L3 series, T3 series, Changshou King II series, E3-PRO series, etc., but there is no specific subdivision of lithium batteries, which is also a problem for almost all battery manufacturers.
Each series of Tianneng lead-acid batteries has its own characteristics: Tianneng L3 series adopts continuous casting and rolling technology and new separator technology with high water retention, the former improves the corrosion resistance and conductivity of the battery, and the latter reduces the water loss of the battery and improves the battery life; In addition to the ternary spherical material modified by graphene composite in the negative electrode, the true black gold T3 series also adds carbon fiber to the positive electrode to improve the internal conductivity of the battery; The second generation of Changshou King adds a low-temperature expander to the electrode plate to improve the working performance of the battery in a low-temperature environment.
Even if Tianneng currently occupies a part of the shares of Chaowei, but the two sides still have a competitive relationship, such as the real black gold T3 series is the benchmark Chaowei black gold series, in the case of similar product lines of the two sides, Tianneng also launched an additional E3-PRO, although it is claimed that by increasing the number of fences in the battery, the battery power performance has been improved by 20%, but this is not a technology with a high threshold, and the actual improvement of battery power should be measured in combination with the power of the electric vehicle motor and the specific driving environment.
It should be noted that in 2019, some users reported on the forum that there was a mixture of new and old battery cells in Tianneng lithium batteries (not sure whether it was refurbished by other manufacturers and not hammered). Therefore, consumers need to be more careful when purchasing, buy from formal channels and keep proof of purchase.
