Battery, a Battery Element and a Method for Forming a Battery

Patent metadata

Field	Value
Publication number	US-2015280276-A1
Application number	US-201414229490-A
Country	US
Kind code	A1
Filing date	Mar 28, 2014
Priority date	Mar 28, 2014
Publication date	Oct 1, 2015
Grant date	—

Abstract

A battery includes at least two externally accessible battery electrodes to provide a supply voltage and at least more than half of a wafer including at least two wafer electrodes. The wafer includes a plurality of trenches reaching into the wafer. At least a part of a trench of the plurality of trenches is filled with a solid state battery structure. The solid state battery structure within the trench includes electrodes electrically connected to the wafer electrodes.

First claim

What is claimed is:

1 . A battery comprising:
at least two externally accessible battery electrodes to provide a supply voltage of the battery; a substrate having a main surface with a surface area of at least 600 cm 2 ; and at least two substrate electrodes disposed on the substrate, wherein the substrate comprises a plurality of trenches extending into the substrate, wherein at least a part of a trench of the plurality of trenches is filled with a solid state battery structure, wherein the solid state battery structure within the trench comprises electrodes electrically connected to the substrate electrodes.

2 . The battery of claim 1 , wherein the substrate comprises at least more than half of a wafer.

3 . The battery of claim 1 , wherein the substrate is substantially a complete wafer comprising the at least two substrate electrodes.

4 . The battery of claim 1 , wherein the trench of the plurality of trenches comprises a cavity.

5 . The battery of claim 1 , wherein the solid state battery structure within the trench comprises a solid state electrolyte layer between a first electrode layer connected to a first substrate electrode of the at least two substrate electrodes and a second electrode layer connected to a second substrate electrode of the at least two substrate electrodes.

6 . The battery of claim 5 , wherein the solid state electrolyte layer comprises lithium phosphorus oxynitride.

7 . The battery of claim 5 , wherein the first electrode layer comprises an anode layer comprising carbon or silicon.

8 . The battery of claim 5 , wherein the second electrode layer comprises a cathode layer comprising lithium cobalt oxide and a collector layer comprising titan nitride.

9 . The battery of claim 1 , wherein trenches of the plurality of trenches extend into the substrate to a depth deeper than 500 μm.

10 . The battery of claim 1 , wherein trenches of the plurality of trenches comprise an aspect ratio larger than 10.

11 . The battery of claim 1 , wherein trenches of the plurality of trenches comprise a maximal width of less than 300 μm.

12 . The battery of claim 1 , wherein adjacent trenches of the plurality of trenches are spaced by a distance between 2 μm and 300 nm.

13 . The battery of claim 1 , wherein trenches of the plurality of trenches comprise a maximal depth larger than a maximal lateral dimension.

14 . The battery of claim 1 , comprising a plurality of substrates, each substrate having a main surface with a surface area of at least 600 cm 2 , wherein each substrate includes trenches comprising solid state battery structures.

15 . The battery of claim 1 , wherein the substrate comprises a control circuit integrated on the substrate.

16 . A battery element comprising a substrate with a plurality of trenches extending into the substrate, wherein a part of a trench of the plurality of trenches is filled with a solid state battery structure, wherein the trench of the plurality of trenches comprises a cavity.

17 . The battery element of claim 16 , wherein a part of each trench of the plurality of trenches is filled with a solid state battery structure and each trench of the plurality of trenches comprises a cavity.

18 . The battery element of claim 16 , comprising a first battery element electrode electrically connected to a first electrode of the solid state battery structure within the trench and a second battery element electrode electrically connected to a second electrode of the solid state battery structure within the trench.

19 . The battery element of claim 16 , wherein the substrate is at least more than half of a wafer.

20 . A mobile device comprising a casing accommodating an electronic device configured to provide at least one of audio data and video data for a user and a battery configured to provide a power supply for the electronic device, wherein the battery comprises a battery element comprising a substrate with a plurality of trenches extending into the substrate, wherein a part of a trench of the plurality of trenches is filled with a solid state battery structure, wherein the substrate maximal dimension larger than a maximal dimension of the casing of the mobile device.

21 . A method for forming a battery, the method comprising:
preparing a wafer comprising at least two wafer electrodes, wherein the wafer comprises a plurality of trenches extending from a surface of the wafer into the wafer, wherein at least a part of a trench of the plurality of trenches is filled with a solid state battery structure, wherein the solid state battery structures within the trenches comprise electrodes electrically connected to the wafer electrodes; and forming a battery package comprising two externally accessible battery electrodes to provide a supply voltage to a connectable device.

22 . The method of claim 21 , comprising cutting the wafer to obtain a remaining part of the wafer with a desired geometry, wherein the remaining part of the wafer is at least more than half of the wafer and comprises the two wafer electrodes.

23 . A method for forming a battery, the method comprising:
providing a wafer; removing a portion of the wafer to form a substrate, the substrate comprising at least half of the wafer; forming at least two wafer electrodes in the substrate, wherein the substrate with the wafer electrodes comprises a plurality of trenches extending into the substrate, wherein at least a part of a trench of the plurality of trenches is filled with a solid state battery structure; and forming at least two externally accessible battery electrodes to provide a supply voltage of the battery, wherein the solid state battery structure within the trench comprises electrodes electrically connected to the wafer electrodes.

Assignees

• Infineon Technologies Ag

Inventors

• Lemke Marko
• Brockhaus Peter
• Lohse Jirko

Classifications

• H01M50/533

  characterised by the shape of the leads or tabs · CPC title

• Y02P70/50

  Manufacturing or production processes characterised by the final manufactured product · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M10/0585

  of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators · CPC title

• G06F1/1635 Primary

  Details related to the integration of battery packs and other power supplies such as fuel cells or integrated AC adapter · CPC title