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Related Party Transactions (Details) - Schedule of Major Related Parties that Transacted with the Group	6 Months Ended
	Jun. 30, 2024
Hangzhou Youyue Travel Technology Co., Ltd. (“Hangzhou Youyue”) [Member]
Related Party Transaction [Line Items]
Relationship with the Group	An affiliate of Bingyi Zhao
Jia Li [Member]
Related Party Transaction [Line Items]
Relationship with the Group	Controlling shareholder, Director and CEO of U Power Limited
Bingyi Zhao [Member]
Related Party Transaction [Line Items]
Relationship with the Group	Director and Chief Financial Officer of U Power Limited
Youche Jingpin E-commerce (Shanghai) Co., Ltd. (“Youche Jingpin”) [Member]
Related Party Transaction [Line Items]
Relationship with the Group	An affiliate of Jia Li
Shanghai Youcang Business Consulting Partnership (Limited Partnership) (“Shanghai Youcang”) [Member]
Related Party Transaction [Line Items]
Relationship with the Group	An affiliate of Jia Li
Li Ke [Member]
Related Party Transaction [Line Items]
Relationship with the Group	Director

X

- Definition

A description of the related party transaction, including transactions to which no amounts or nominal amounts were ascribed and such other information deemed necessary to an understanding of the effects of the transactions on the financial statements. Examples of common related party transactions are, sales, purchases and transfers of realty and personal property, services received or furnished, loans and leases to and from top management and affiliates.

+ References

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-SubTopic 10
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-Section 50
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(23))
-Publisher FASB
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-7

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-Topic 842
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-Name Accounting Standards Codification
-Section 50
-Paragraph 4
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-Topic 842
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479741/842-40-50-1

+ Details

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Balance Type:	na
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
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-Publisher FASB
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-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(2)(c)(2)(i))
-Publisher FASB
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-Section S99
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-Topic 946
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-Section S99
-Paragraph 1
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1

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- Details

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X

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=ucar_JiaLiMember
Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=ucar_BingyiZhaoMember
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Balance Type:
Period Type:

X

- Details

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- Details

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- Details

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