US 10,770,698 B1Granted

Miniature electrochemical cell having a casing comprising opposed ceramic substrates secured together using a precious metal braze

AssigneeGreatbatch Ltd.

InventorsKeith W. Seitz, Brian P. Hohl, Todd C. Sutay, Gary Freitag

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Abstract

A miniature electrochemical cell having a volume of less than 0.5 cc is described. The cell has a casing of first and second ceramic substrates that are hermetically secured to each other to provide an internal space housing an electrode assembly. First and second conductive pathways extend through the ceramic substrates. The pathways have respective inner surfaces that are conductively connected to the respective anode and cathode current collectors and respective outer surfaces that provide for connection to a load. An electrolyte in the internal space of the housing activates the electrode assembly.

Claims36

Dependent claims

An electrochemical cell, comprising:

a) a casing, comprising:
i) a first ceramic substrate comprising opposed first substrate inner and outer surfaces;
ii) a second ceramic substrate comprising opposed second substrate inner and outer surfaces;
and
iii) a precious metal disc hermetically sealing the first and second ceramic substrates together to provide the casing;
and
b) an electrode assembly housed inside the casing, the electrode assembly comprising:
i) an anode active material contacting an anode current collector;
ii) a cathode active material contacting a cathode current collector;
and
iii) a separator disposed between the anode and cathode active materials;
and
c) a first conductive pathway extending through the first ceramic substrate and comprising first conductive pathway inner and outer surfaces located at or adjacent to the respective first ceramic substrate inner and outer surfaces;
d) a second conductive pathway extending through the second ceramic substrate and comprising second conductive pathway inner and outer surfaces located at or adjacent to the respective second ceramic substrate inner and outer surfaces,
e) wherein the first conductive pathway inner surface is in an electrically conductive relationship with one of the anode and cathode current collectors, and wherein the second conductive pathway inner surface is in an electrically conductive relationship with the other of the anode and cathode current collectors, and
f) wherein the respective first and second conductive pathway outer surfaces are configured for electrical connection to a load;
and
g) an electrolyte inside the casing in contact with the electrode assembly.

15 more elements

An electrochemical cell, comprising:

a) a casing, comprising:
i) a first ceramic substrate comprising opposed first substrate inner and outer surfaces, wherein a first substrate annular wall extends outwardly from the first substrate inner surface;
ii) a second ceramic substrate comprising opposed second substrate inner and outer surfaces, wherein a second substrate annular wall extends outwardly from the second substrate inner surface;
and
iii) a precious metal disc hermetically sealing the first and second outwardly extending annular walls of the respective first and second ceramic substrates together to provide the casing;
and
b) an electrode assembly housed inside the casing, the electrode assembly comprising:
i) an anode active material contacting an anode current collector;
ii) a cathode active material contacting a cathode current collector;
and
iii) a separator disposed between the anode and cathode active materials;
and
c) a first conductive pathway extending through the first ceramic substrate and comprising first conductive pathway inner and outer surfaces located at or adjacent to the respective first ceramic substrate inner and outer surfaces;
d) a second conductive pathway extending through the second ceramic substrate and comprising second conductive pathway inner and outer surfaces located at or adjacent to the respective second ceramic substrate inner and outer surfaces,
e) wherein the first conductive pathway inner surface is in an electrically conductive relationship with one of the anode and cathode current collectors, and wherein the second conductive pathway inner surface is in an electrically conductive relationship with the other of the anode and cathode current collectors, and
f) wherein the respective first and second conductive pathway outer surfaces are configured for electrical connection to a load;
and
g) an electrolyte inside the casing in contact with the electrode assembly.

15 more elements

An electrochemical cell, comprising:

a) a casing, comprising:
i) a first ceramic substrate comprising opposed first substrate inner and outer surfaces, wherein a first substrate annular wall extends outwardly from the first substrate inner surface;
ii) a second ceramic substrate comprising opposed second substrate inner and outer surfaces;
and
iii) a precious metal disc hermetically sealing the first substrate annular wall to the second ceramic substrate to provide the casing;
and
b) an electrode assembly housed inside the casing, the electrode assembly comprising:
i) an anode active material contacting an anode current collector;
ii) a cathode active material contacting a cathode current collector;
and
iii) a separator disposed between the anode and cathode active materials;
and
c) a first conductive pathway extending through the first ceramic substrate and comprising first conductive pathway inner and outer surfaces located at or adjacent to the respective first substrate inner and outer surfaces;
d) a second conductive pathway extending through the second ceramic substrate and comprising second conductive pathway inner and outer surfaces located at or adjacent to the respective second substrate inner and outer surfaces,
e) wherein the first conductive pathway inner surface is in an electrically conductive relationship with one of the anode and cathode current collectors, and wherein the second conductive pathway inner surface is in an electrically conductive relationship with the other of the anode and cathode current collectors, and
f) wherein the respective first and second conductive pathway outer surfaces are configured for electrical connection to a load;
and
g) an electrolyte inside the casing in contact with the electrode assembly.

15 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/003,868Filed 8 Jun 2018 · us provisional application
Priority: 9 Jun 2017
Granted: 8 Sep 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification12 codes

H01M 50/107
Characterised by their shape or physical structure: having curved cross-section, e.g. round or elliptic
H01M 50/186
Sealing members: characterised by the disposition of the sealing members
H01M 50/128
Comprising three or more layers: with two or more layers of only inorganic material
H01M 50/152
Characterised by their shape: for cells having curved cross-section, e.g. round or elliptic

Family

Application62/517,408Us provisional application · filed 9 Jun 2017
US 10,770,698 B1This patent

From the US filing history. Foreign family members aren’t listed.

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