Battery cell of semi-winding laminated lithium-ion battery and preparation method of battery cell

A lithium-ion battery, cell technology, applied in secondary batteries, circuits, electrical components, etc., to achieve the effect of improving consistency, improving thermal cycling, and lowering production costs

Pending Publication Date: 2018-11-13
樊朝晖
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the defects in the above-mentioned prior art, the present invention provides an intermediate state lithium battery cell between the winding type and the laminated type and its preparation method, thereby simultaneously solving the problems caused by the above two process routes. application defect

Method used

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  • Battery cell of semi-winding laminated lithium-ion battery and preparation method of battery cell
  • Battery cell of semi-winding laminated lithium-ion battery and preparation method of battery cell
  • Battery cell of semi-winding laminated lithium-ion battery and preparation method of battery cell

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Embodiment Construction

[0033] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0034] see figure 1 , 4 As shown in ~6, a half-wound laminated lithium-ion battery cell includes a cell casing 1, and the outside of the cell casing 1 is provided with a positive pole pole 11 and a negative pole pole 12. The inside of the core housing 1 is provided with a flat mandrel 2, a diaphragm bag 3, an electrode strip 4 and an electrolyte; the flat mandrel 2 is a square bracket made of a heat-conducting material, and the inside of the square bracket is It has a honeycomb or grid-like hollow structure, the electrolyte is injected into the honeycomb or grid-like hollow structure inside the flat mandrel 2, and the diaphragm bag 3 is wrapped outside the flat mandrel 2; The polarity belt 4 is wound on the flat mandrel 2 wrapped with the diaphragm bag 3, and fixed into a square structure, and the positive pole 5 and the negative p...

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Abstract

The invention discloses a battery cell of a semi-winding laminated lithium-ion battery and a preparation method of the battery cell. The battery cell is composed of a battery cell housing, a flat plate core rod, a diaphragm bag, a polar electric band and electrolyte; the preparation method comprises the following steps: preparing the flat plate core rod and opening a honeycomb-shaped or grid-shaped hollow structure in the flat plate core rod; sleeving the diaphragm bag; preparing a positive pole piece with tabs and a negative pole piece with tabs by utilizing an aluminum foil and a copper foilrespectively, and coating positive and negative pole materials respectively; laminating the positive pole piece and the negative pole piece by utilizing an ion exchange diaphragm to form the polar electric band; winding on the flat plate core rod covered with the diaphragm bag; meanwhile, overlapping all positive tabs and negative tabs together respectively to form a positive pole and a negativepole, which are provided with the polar electric band; putting the battery cell into the battery cell housing; injecting the electrolyte and sealing. According to the battery cell, a semi-winding design model is adopted to generate the rotary battery cell with a semi-winding inner part and a square-structure outer part; the problems of an existing battery cell of a lithium battery that inner and outer temperature is not uniform, the service life is relatively short, the structure stability is poor, the energy consistency is poor and the like are solved.

Description

technical field [0001] The invention belongs to the technical field of lithium batteries, and in particular relates to a half-wound laminated lithium-ion battery cell and a preparation method thereof. Background technique [0002] Lithium battery is the core product of the energy industry and an indispensable factor for dispatching energy. The core unit that constitutes a lithium battery is the lithium battery cell, so the production and preparation of the cell determines the success or failure of the lithium battery industry. [0003] At present, the production methods of lithium battery cells are mainly divided into winding process and lamination process. These two processes have their own advantages and disadvantages. Among them, the winding process has the advantages of high output, high degree of automation, and high production efficiency. It is also the most mature cell preparation process so far. Therefore, in the process of practical application, lithium battery ce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0525H01M10/0587
CPCH01M10/0525H01M10/0587Y02E60/10Y02P70/50
Inventor 樊朝晖王占伟戴鹏飞孙敏南
Owner 樊朝晖
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