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Composite anode for a galvanic cell and a galvanic cell

A primary battery and anode technology, applied to large-size batteries/battery packs, small-size batteries/battery packs, battery electrodes, etc., to avoid deep discharge states, improve service life, and avoid damage

Inactive Publication Date: 2017-05-10
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] It is disadvantageous in the prior art that deep discharges are not satisfactorily avoided, that auxiliary electrodes are required or that there is a difference between the discharge capacity and the charge capacity of the electrode material such that the charge / discharge cycle is only limitedly reversible

Method used

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  • Composite anode for a galvanic cell and a galvanic cell
  • Composite anode for a galvanic cell and a galvanic cell
  • Composite anode for a galvanic cell and a galvanic cell

Examples

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Embodiment Construction

[0039] figure 1 The prismatic battery cell 1 is shown in an exploded view. The prismatic battery cell 1 has a winding element 3 comprising an anode and a cathode, which has a wound layer stack 5 . For electrical contacting, the anodes and the cathodes are stacked on top of each other in a slightly offset manner along the winding axis in opposite directions, so that the anodes and the cathodes project on opposite narrow sides slightly beyond the The corresponding edge of the winding element 3. A current collector 7 is welded onto the raised edge region 4 such that it is electrically connected to the anode of the winding element 3 . A second current collector 9 is welded to the opposite edge region in order to establish electrical contact with the cathode of the winding element 3 . The winding element 3 equipped with current collectors 7 and 9 is located in a hermetically sealed battery housing 11 in which a liquid electrolyte is located. The rectangular parallelepiped batt...

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Abstract

The invention relates to an anode for a galvanic cell, wherein the anode is constructed from an anode material containing a main component which releases lithium ions during a discharge process (26) of the galvanic cell, and at least one additive, wherein the at least one additive has an electrochemical potential which is higher with respect to elemental lithium than an electrochemical potential of the main component with respect to elemental lithium, the at least one additive has a charging capacity and a discharging capacity, and the charging capacity does not deviate from the discharging capacity by more than 10%, and a galvanic cell comprising this anode.

Description

technical field [0001] The invention relates to an anode for a galvanic cell and a galvanic cell having said anode. Background technique [0002] Rechargeable primary cells, for example battery cells with lithium-containing anodes, have a very high energy density or specific energy available, especially compared to battery cells based on nickel-metal mixtures or lead-acid. Lithium-ion battery packs can be used not only in partially or completely electrically driven vehicles, electric vehicles or hybrid vehicles but also in computer technology, especially in notebook computers, smartphones or tablet computers (Tablet -PC). Lithium-ion batteries have at least one positive electrode (cathode) and at least one negative electrode (anode), which are capable of reversibly storing lithium ions (intercalation) or removing lithium ions again (intercalation). Embedded (Deinterkalation)). A rechargeable battery, also called a secondary battery, is a parallel or series connection of a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/38H01M4/485H01M4/525H01M4/587H01M10/052H01M50/103
CPCH01M4/364H01M4/38H01M4/386H01M4/485H01M4/525H01M4/587H01M10/052H01M50/103Y02E60/10H01M10/0525
Inventor T.韦尔勒C.I.武尔姆V.A.戈德博勒
Owner ROBERT BOSCH GMBH
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