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Principal Activities, Basis of Presentation and Organization (Narrative) (Details) |  |  |  |  |  | 1 Months Ended | 2 Months Ended | 9 Months Ended | 12 Months Ended |  |  |  |  |  |
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Jul. 08, 2018 USD ($) | May 10, 2017 USD ($) | Apr. 02, 2017 USD ($) | Mar. 04, 2016 shares | Nov. 09, 2007 USD ($) $ / shares shares | May 31, 2017 USD ($) $ / shares shares | Apr. 26, 2017 USD ($) | Apr. 21, 2017 USD ($) | Jan. 31, 2017 USD ($) | Jul. 28, 2016 USD ($) $ / shares shares | Jun. 30, 2016 USD ($) | Sep. 29, 2015 USD ($) $ / shares shares | Jan. 20, 2015 USD ($) shares | Jul. 31, 2015 USD ($) | Sep. 30, 2018 USD ($) $ / shares shares | Sep. 30, 2009 shares | Sep. 30, 2008 USD ($) | Sep. 30, 2007 shares | Sep. 30, 2006 shares | Sep. 30, 2018 CNY (¥) shares | May 04, 2018 USD ($) | May 04, 2018 CNY (¥) | Dec. 31, 2017 shares | Feb. 17, 2017 USD ($) | Dec. 27, 2013 USD ($) | Aug. 14, 2013 USD ($)
Stock Issued During Period, Shares, New Issues | shares |  |  |  |  | 3,500,000 | 6,403,518 |  |  |  | 2,206,640 |  |  | 1,720,087 |  |  |  |  |  |  |  |  |  |  |  |  |
Principal Activities, Basis Of Presentation And Organization 32 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 90.00% |  |  |  |  |  |  |  |  |  |  |
Sale of Stock, Price Per Share | $ / shares |  |  |  |  | $ 3.90 | $ 1.50 |  |  |  | $ 2.5 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance of Private Placement |  |  |  |  | $ 13,650,000 | $ 9,600,000 |  |  |  | $ 5,520,000 |  |  | $ 17,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Shares placed in escrow | shares |  |  |  |  |  |  |  |  |  |  |  |  | 435,910 |  |  |  |  |  |  |  |  |  |  |  |  |
Description of terms of shares places in escrow |  |  |  |  |  |  |  |  |  |  |  |  | Pursuant to the Escrow Agreement, 50% of the escrowed shares were to be released to the investors in the private placement if audited net income of the Company for the fiscal year ended September 30, 2005 was not at least $12,000,000, and the remaining 50% was to be released to investors in the private placement if audited net income of the Company for the fiscal year ended September 30, 2006 was not at least $27,000,000. If the audited net income of the Company for the fiscal years ended September 30, 2005 and 2006 reached the above-mentioned targets, the 435,910 shares would be released to Mr. Li in the amount of 50% upon reaching the 2005 target and the remaining 50% upon reaching the 2006 target. |  |  |  |  |  |  |  |  |  |  |  |  |
Shares released from escrow | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 73,749 |  | 217,955 | 217,955 |  |  |  |  |  |  |
Adjustments to Additional Paid in Capital, Other |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 7,955,358 |  |  |  |  |  |  |  |  |
Shares transferred | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,000,000 |  |  |  |  |  |  |  |  |  |  |
Shares transferred, price per share | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2.4 |  |  |  |  |  |  |  |  |  |  |
Common Stock, Shares, Outstanding | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 26,647,478 |  |  |  |  | 26,647,478 |  |  | 26,223,317 |  |  |
Proceeds from advances from potential investors | $ 2,600,000 |  |  |  |  |  |  |  |  |  | $ 2,900,000 |  |  | $ 9,800,000 |  |  |  |  |  |  |  |  |  |  |  |
Debt Conversion, Converted Instrument, Amount |  |  |  |  |  |  |  |  |  |  |  | $ 9,847,644 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Conversion, Converted Instrument, Shares Issued | shares |  |  |  |  |  |  |  |  |  |  |  | 4,376,731 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Convertible, Conversion Price | $ / shares |  |  |  |  |  |  |  |  |  |  |  | $ 2.25 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock, Value, Subscriptions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 10,000,000 |  |
Proceeds from down payment of share subscriptions |  | $ 2,985,497 | $ 1,999,910 |  |  |  | $ 1,119,982 | $ 3,499,888 | $ 2,060,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Bank Loans |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 23,000,000 |  |  |  |  |  |  |  |  |  |  |
Other current liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 91,600,000 |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Remaining Borrowing Capacity |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 16,800,000 |  |  |  |  |  |  |  |  |  |  |
Mr. Xiangqian Li [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock, Shares, Outstanding | shares |  |  |  | 760,557 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of Stock, Percentage of Ownership after Transaction |  |  |  | 4.40% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mr. Yunfei Li [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues | shares |  |  |  |  |  | 746,018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock, Shares, Outstanding | shares |  |  |  | 3,000,000 |  |  |  |  |  |  |  |  |  |  | 3,868,518.0 |  |  |  |  | 3,868,518.0 |  |  |  |  |  |
Sale of Stock, Percentage of Ownership after Transaction |  |  |  | 17.30% |  |  |  |  |  |  |  |  |  |  | 14.52% |  |  |  |  |  |  |  |  |  |  |
Common Stock, Value, Subscriptions |  |  |  |  |  |  |  |  | 1,120,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from down payment of share subscriptions |  |  |  |  |  |  |  |  | $ 225,784 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CBAK Trading [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered capital of subsidiary |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 500,000
Accumulated contributions to subsidiary |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 100,000 |  |  |  |  |  |  |  |  |  |  |
CBAK Power [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered capital of subsidiary |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 30,000,000 |
Accumulated contributions to subsidiary |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 29,999,978 |  |  |  |  |  |  |  |  |  |  |
CBAK Suzhou [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered capital of subsidiary |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,500,000 | ¥ 10,000,000 |  |  |  |
Accumulated contributions to subsidiary |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,100,000 |  |  |  |  | ¥ 7,600,000 |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 90.00% |  |  |  |  | 90.00% |  |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10.00% |  |  |  |  | 10.00% |  |  |  |  |  |
Accumulated contributions to subsidiary from noncontrolling interests |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 26,864 |  |  |  |  | ¥ 184,500 |  |  |  |  |  |

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