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Concentrations and Credit Risk (Details 2) - USD ($)
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Sales of finished goods $ 24,433,304 $ 58,375,399
Proceeds on disposal of patented proprietary technology offset against amount due to a former subsidiary 12,845,795
BAK Tianjin [Member]    
Purchase of inventories 716,997 126,567
Sales of finished goods 36,766 141,117
BAK Shenzhen [Member]    
Purchase of inventories [1] 107,280 27,903,206
Sales of finished goods 61,961
Proceeds on disposal of patented proprietary technology offset against amount due to a former subsidiary [1] 12,845,795
Zhengzhou BAK Battery Co Ltd [Member]    
Purchase of inventories [2] 2,032,756
Sales of finished goods [2] $ 29,867
[1] Mr. Xiangqian Li, our former CEO, is a director of this company.
[2] Mr. Xiangqian Li, the former CEO, is a director of this company. As of December 31, 2018 and December 31, 2017, payable to Zhengzhou BAK Battery Co., Ltd were $2,291,621 and nil, respectively, was included in trade accounts and bills payable.