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Lithium battery of dual-cell structure and cell assembling method thereof

A lithium battery and dual-cell technology, which is applied in the manufacture of battery pack components, non-aqueous electrolyte batteries, and electrolyte batteries, can solve the problems of multiple processes and difficult quality control, and achieve risk reduction, good consistency, and avoid The effect of foreign matter

Active Publication Date: 2017-11-03
北京北方华创新能源锂电装备技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing double-cell structure battery design is mostly welded separately on both sides, which has disadvantages such as many processes and difficult quality control.

Method used

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  • Lithium battery of dual-cell structure and cell assembling method thereof
  • Lithium battery of dual-cell structure and cell assembling method thereof
  • Lithium battery of dual-cell structure and cell assembling method thereof

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Embodiment Construction

[0027] In order to make the technical solutions and advantages of the present invention clearer, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. D.

[0028] see Figure 1-3 , showing the internal structure of a lithium battery with a double-cell structure of the present invention, including two cells 3, the cells 3 are connected by tabs 5 with a top cover 6, and the other side of the tabs 5 is a plate 4 , the pole ears 5 on both sides are fixed to the top cover 6, and the safety cover 1 is welded on the lower side of the top cover 6, and the safety cover is connected with the top cover 6 by laser welding. This device increases the safety performance of the battery.

[0029] The positive and negative tabs 5 connected to the battery core 3 have the same structure, for example, they are both I-shaped and can be folded in half. They are all one-time molding, and the connection with the top cover 6 is...

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Abstract

The invention relates to a lithium battery of a dual-cell structure and a cell assembling method thereof. The dual-cell structure comprises two cells which are connected in parallel, and the cells are laminated together and then are placed in a shell. The assembling method comprises the followings steps: putting the cells after winding into a welding tool, putting a pole plate on the lower side respectively, putting a pole lug on the upper side respectively, and using a resistor welding manner to combine the cells.

Description

technical field [0001] The invention relates to the field of lithium-ion secondary batteries, in particular to a lithium battery with a double-cell structure and a cell assembly method thereof. Background technique [0002] As large-capacity lithium batteries are widely used in power vehicles, energy storage and other fields, more and more attention has been paid to the structure and assembly methods of batteries. The traditional battery is designed as a single-cell structure. Due to the large thickness, the wettability between the pole piece and the electrolyte is not good, and the internal resistance is inconsistent, which is easy to cause premature deterioration of the battery. [0003] The finished lithium battery includes the main components such as the battery cell, the tab, the upper cover structure, and the casing. When assembling, the battery cell and the tab need to be welded and inserted into the case, and the electrolyte is injected. The cell structure design of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0525H01M10/058H01M2/26H01M2/20H01M50/502H01M50/528H01M50/531
CPCH01M10/0525H01M10/058H01M50/50H01M50/531Y02E60/10Y02P70/50
Inventor 刘晓晔
Owner 北京北方华创新能源锂电装备技术有限公司