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Concentrations and Credit Risk (Details 4) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Sales of finished goods and raw materials $ 10,620,656 $ 8,089,804 $ 22,146,177 $ 17,532,415
BAK Shenzhen [Member]        
Purchase of inventories [1]   [2]   65,102
Sales of finished goods and raw materials [1]     769,052
Zhengzhou BAK New Energy Vehicle Co., Ltd. [Member]        
Sales of finished goods and raw materials [3] $ 1,896,207 $ 1,896,207
[1] Mr. Xiangqian Li is a director of BAK Shenzhen and Shenzhen BAK
[2] Mr. Xiangqian Li, the Company's former CEO, is a director of these companies.
[3] Mr. Xiangqian Li, is a director of Zhengzhou BAK New Energy Vehicle Co., Ltd, which has 29% equity interests in Zhengzhou BAK New Energy Technology Co., Ltd