Electrochemical cell

An electrochemical and battery technology, applied in the field of electrochemical batteries, can solve problems such as intensifying interfacial processes

Pending Publication Date: 2022-05-10
VOLKSWAGEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Here, the disadvantage is exacerbated irreversible interfacial processes (O 2 Gas formation, phase transition from layered to localized, cubic, electrochemically inert rock-salt phase)

Method used

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  • Electrochemical cell
  • Electrochemical cell
  • Electrochemical cell

Examples

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Embodiment Construction

[0051] figure 1 The electrochemical cell 2 is shown in a schematic and greatly simplified representation. The battery 2 has a pressure-tight battery housing 4 in which open, ie housing-free, battery cells 6 are accommodated. The battery cell 6 has a cathode layer 8 and an anode layer 10 as well as a separator layer 12 arranged therebetween. The battery 2 has a pressurization device 14 with an inflatable bag 16 and a valve 18 . A pump or cylinder can be connected to the pressurization device 14 via a valve 18, by means of which the bag 16 can be inflated. During inflation, the bag 16 increases the internal hydraulic pressure inside the cell casing 4 and thus increases the pressure on the cathode layer 8 . The cathode layer 8 is made of pure lithium nickel dioxide.

[0052] Refer below Figures 2 to 6 The method according to the invention for operating the battery 2 is explained in more detail. Figures 2 to 6 The processes within the cathode layer 8 during the course of t...

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PUM

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Abstract

The invention relates to an electrochemical cell (2) having a cell housing (4) and at least one cell unit (6) accommodated in the cell housing (4), the cell unit (6) having a cathode layer (8), the cathode layer (8) having pure lithium nickel dioxide as an active material, and wherein a pressure device (14) is provided, by means of the pressure device (14), an increased pressure can be applied to the cathode layer (8) at least temporarily.

Description

technical field [0001] The present invention relates to an electrochemical cell (or electrochemical accumulator), in particular an electrochemical cell for a motor vehicle, having a battery housing and at least one electrochemical cell housed in said battery housing, said electrochemical cell The battery cell has at least one cathode layer. The invention also relates to a method for operating such a battery (or accumulator). Background technique [0002] Electrically or electromechanically driven or propellable motor vehicles, such as electric or hybrid vehicles, generally comprise an electric motor with which one or two axles can be driven. To provide electrical energy, the electric motor is usually connected to a (high voltage) battery inside the vehicle as an electrical energy store. [0003] Electrochemical batteries, in particular, are to be understood here and below in particular as so-called secondary batteries (secondary batteries) of motor vehicles. In such (seco...

Claims

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Application Information

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IPC IPC(8): H01M50/10H01M50/172H01M50/249H01M50/30H01M10/44
CPCH01M50/249H01M50/10H01M50/172H01M50/30H01M10/44H01M50/102H01M10/0525H01M10/4235H01M10/0468H01M4/525Y02E60/10Y02P70/50
Inventor V.格拉瓦斯J.库普曼J.米勒S.B.奥洛乌圭弗J.韦格纳M.维索普
Owner VOLKSWAGEN AG
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