Battery cell

By adopting the design of winding electrode body and integrated housing in the power storage cell, the problem of the number of components and energy density improvement space in the prior art is solved, and a higher energy density and a smaller number of components are achieved.

CN119674366APending Publication Date: 2025-03-21TOYOTA JIDOSHA KK
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Patent Information

Application Number
CN202411261879.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2023-09-20
Filing Date
2024-09-10
Publication Date
2025-03-21

AI Technical Summary

Technical Problem

There is room for improvement in the number of components and energy density per unit volume of existing power storage cells.

Method used

The design of winding electrode body and integrated housing is adopted, where the bottom of the housing has a current collection function, which reduces the number of components of a single cell, and increases the space of the electrode body through an integrated method and increases the energy density.

Benefits of technology

The number of components of the electric storage cell is effectively reduced, the space of the electrode body is increased, and the energy density per unit volume of the cell is increased.

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Abstract

The invention relates to a storage cell. In a storage cell according to the present disclosure, a first electrode of a wound electrode body includes a sheet-shaped current collector and an electrode mixture layer formed on the current collector. The current collector includes a coated portion coated with the electrode mixture layer and an uncoated portion not coated with the electrode mixture layer. The uncoated portion protrudes from the coated portion toward one side in the axial direction of the wound electrode body. The case accommodates the wound electrode body and includes a cylindrical wall portion and a bottom portion. The cylindrical wall portion is provided so as to cover the outer peripheral side of the wound electrode body. The bottom portion is disposed on one side in the axial direction, is connected to one end of the cylindrical wall portion, and is joined to the uncoated portion by welding.
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