Principal Activities, Basis of Presentation and Organization (Narrative) (Details)						1 Months Ended								2 Months Ended	9 Months Ended	12 Months Ended
	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