Implantable battery having thermal shutdown separator

Patent metadata

Field	Value
Publication number	US-8945753-B2
Application number	US-4330105-A
Country	US
Kind code	B2
Filing date	Jan 26, 2005
Priority date	Jan 26, 2005
Publication date	Feb 3, 2015
Grant date	Feb 3, 2015

Abstract

The present teachings include an electrochemical cell including an anode, a cathode, an electrolyte, a separator disposed between the cathode and anode, and a housing containing the anode, cathode, electrolyte, and separator. The separator can include a first sheet consisting essentially of a single layer material and a second sheet distinct from the first sheet. The second sheet can include an inner microporous layer laminated between two more outer layers. In some cells, the inner layer can have a transition temperature between a porous configuration and a substantially non-porous configuration that is between about 80 degrees C. and 150 degrees C., and in which the two more outer layers maintain their structural integrity to at least about 10 degrees C. greater than the first layer transition temperature.

First claim

We claim:

1. An electrode assembly comprising:
a first electrode;
a second electrode;
an electrolyte; and
a separator located between the first and second electrodes to prevent contact therebetween;
the separator comprising:
a first separator sheet disposed between the first electrode and the second electrode, the first separator sheet comprising two permeable outer layers each adhered to a microporous inner layer; and
a second separator sheet disposed between the first…

Assignees

• Chen Kaimin
• Schmidt Craig L
• Skarstad Paul M
• Medtronic Inc

Inventors

• Chen Kaimin
• Schmidt Craig L
• Skarstad Paul M

Classifications

• H01M10/4235 Primary

  Electricity · mapped topic

• H01M50/457

  Electricity · mapped topic

• H01M50/491

  Electricity · mapped topic

• H01M50/417

  Electricity · mapped topic

• H01M50/489

  Electricity · mapped topic