Cell unit having expansion burst region

A battery unit and area technology, applied in the direction of electrical components, secondary batteries, battery pack components, etc., to achieve the effects of reducing costs, increasing service life, and improving safety

Inactive Publication Date: 2014-08-06
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Such volume changes can be problematic especially in combination with a limited space availability and the arrangement of a large number of battery cells in a battery module

Method used

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  • Cell unit having expansion burst region
  • Cell unit having expansion burst region
  • Cell unit having expansion burst region

Examples

Experimental program
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Effect test

Embodiment Construction

[0051] figure 1 An exploded view of a conventional Li-ion battery cell is shown. It can be seen that the battery cell is composed of a large number of individual components. Only the components and their features required for understanding the embodiments of the present invention are described here, and the remaining components of the battery unit are not described.

[0052] The battery cell 1 has at least one winding element 3 comprising a wound stack of a copper foil, an aluminum foil and a plastic film between them.

[0053] A current collector 7 made of copper is welded onto the raised region of the copper foil so that it is electrically connected to the anode of the winding element. A second current collector 9 made of aluminum is welded to an oppositely raised region of the aluminum foil in order to produce an electrical contact with the cathode of the winding element 3 . The current collectors 7 and 9 serve to electrically connect the battery cells to external compon...

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Abstract

The cell (1) has a housing (11) comprising an expansion burst region whose elasticity is larger than a elasticity of the housing. The expansion burst region forms a bulge that is turned away by a winding element when temperature-dependant volume change of housing contents increases within a given temperature operation range of the cell. The expansion burst region is arranged to rupture when a predetermined maximum pressure is exceeded within the housing. The housing is formed with stared wall portions. The expansion burst region forms an electrolyte-resistant elastic membrane. The elastic membrane is made of plastic material i.e. elastomer.

Description

technical field [0001] The invention relates to a battery cell, especially a lithium-ion battery cell. The invention also relates to a vehicle with such a battery unit. Background technique [0002] A battery cell, sometimes called a battery cell, is used to chemically store electrical energy for use. Today battery cells are used for the energy supply of a large number of mobile devices. In the future, battery cells are to be used primarily for the energy supply of mobile electric or hybrid vehicles on land and water, or for the stationary intermediate storage of electrical energy from alternative energy sources. [0003] For this purpose, a large number of battery cells are usually combined to form a battery pack. In order to utilize the available pack volume as efficiently as possible in this case, battery cells having a prismatic, for example cuboid, shape are used for this purpose. [0004] Due to its possible high energy density, thermal stability and lack of memory...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/02H01M2/04H01M2/12H01M50/147H01M50/15H01M50/183H01M50/342
CPCH01M10/0587H01M2/04H01M2/1241H01M2/12H01M2/043H01M50/147H01M50/3425Y02E60/10Y02P70/50
Inventor K.梅茨多夫
Owner ROBERT BOSCH GMBH
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