Power unit using flexible conductive member

• US 9,923,176 B2
• Filed: 04/08/2015
• Issued: 03/20/2018
• Est. Priority Date: 04/08/2015
• Status: Active Grant

• Current Assignee: STMicroelectronics SAS (STMicroelectronics NV)
• Original Assignee: STMicroelectronics SAS (STMicroelectronics NV)
• Inventors: Durand, Alexis, Dosseul, Franck
• Primary Examiner(s): Ridley, Basia
• Assistant Examiner(s): Erwin, James
• Application Number:
  US14/681,237
• Publication Number:
  US 20160301037A1
• Time in Patent Office: 1,077 Days
• Field of Search: 429127
• CPC Class Codes: H01M 10/0436 Small-sized flat cells or batteries for portable equipment
• CPC Class Codes: H01M 2220/30 Batteries in portable systems, e.g. mobile phone, laptop
• CPC Class Codes: H01M 50/528 Fixed electrical connections, i.e. not intended for disconnection
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

An electronic device includes a flexible conductive member having a first length, and a battery substrate having a second length shorter or equal than the first length. There is an active battery on the battery substrate. An adhesive layer couples the active battery and the battery substrate to the flexible conductive member such that the active battery and the flexible conductive member are electrically coupled, and such that the flexible substrate encapsulates the active battery and the upper portion of the battery substrate without an intervening layer. The flexible conductive member includes an insulating flexible base layer having a conductive via formed therein. Upper and lower metallized layers are formed on the insulating flexible base layer and are electrically coupled to one another by the conductive via.

Claims

1. A power source device, comprising:

a flexible conductive member;

a battery substrate;

an active battery having a first face that is mounted to a first face of the battery substrate, the active battery including first and second battery terminals exposed on a second face of the active battery opposite to the first face of the active battery; and

an adhesive layer coupling the active battery and the battery substrate to the flexible conductive member such that the active battery and the flexible conductive member are electrically coupled, and such that the flexible conductive member encapsulates the active battery and the first face the battery substrate without an intervening layer.

2. The power source device of claim 1, wherein the active battery comprises a metallic lithium layer;

and wherein the adhesive layer directly contacts the metallic lithium layer without an intervening mica substrate layer.

3. The power source device of claim 1, wherein the flexible conductive member directly encapsulates the active battery and first face of the battery substrate without an intervening mica substrate layer.

4. The power source device of claim 1, wherein the flexible conductive member comprises:

an insulating flexible base layer having a conductive via formed therein; and

upper and lower metallized layers formed on the insulating flexible base layer and being electrically coupled to one another by the conductive via.

5. The power source device of claim 1, wherein the flexible conductive member comprises:

an insulating flexible base layer having conductive vias formed therein;

an upper metallization layer formed on an upper portion of the insulating flexible base layer comprising an upper metallized anode conductor layer formed on the upper portion of the insulating flexible base layer, and an upper metallized cathode conductor layer formed on the upper portion of the insulating flexible base layer; and

a lower metallization layer formed on a lower portion of the insulating flexible base layer comprising a lower metallized anode conductor layer formed on the lower portion of the insulating flexible base layer, and a lower metallized cathode conductor layer formed on the lower portion of the insulating flexible base layer;

wherein the conductive vias of the insulating flexible base layer electrically couple the upper metallized anode conductor layer to the lower metallized anode conductor layer, and the upper metallized cathode conductor layer to the lower metallized cathode conductor layer.

6. The power source device of claim 1, wherein the flexible conductive member is constructed from a material selected from the group consisting of polyimide, polyethylene terephthalate, and polyethylene naphthalate.

7. The power source device of claim 1, wherein the flexible conductive member has a first length;

wherein the battery substrate has a second length shorter than the first length;

wherein the flexible conductive member is bent so as to have a first portion adjacent the active battery and the first face of the battery substrate, a second portion adjacent a second face of the battery substrate opposite the first face of the battery substrate, and a curved portion extending between the first and second portions; and

further comprising an additional adhesive layer coupling the first and second portions of the flexible conductive member together at portions thereof that extend beyond the battery substrate.

8. The power source device of claim 7, wherein the first portion of the flexible conductive member, curved portion of the flexible conductive member, additional adhesive layer, and second portion of the flexible conductive member encapsulate the battery substrate and active battery.

9. The power source device of claim 8, wherein the encapsulation environmentally seals the active battery from oxygen and water ingress.

10. The power source device of claim 1, wherein the flexible conductive member is adjacent the active battery and first face of the battery substrate;

further comprising an additional flexible conductive member adjacent a second face of the battery substrate opposite the first face of the battery substrate such that the battery substrate is sandwiched between the flexible conductive member and additional flexible conductive member; and

further comprising an additional adhesive layer coupling the flexible conductive member and additional flexible conductive member together at portions thereof that extend beyond the battery substrate.

11. The power source device of claim 1, wherein the flexible conductive member has a first length;

wherein the battery substrate has a second length shorter than the first length;

wherein the flexible conductive member is adjacent the active battery and the first face of the battery substrate;

further comprising a device substrate carrying the battery substrate such that the second face of the battery substrate is in contact with the device substrate;

wherein the flexible conductive member is bent such that the flexible conductive member is in contact with the device substrate.

12. A power source device, comprising:

a flexible conductive member having a first length;

a battery substrate having a second length that is shorter than the first length, the battery substrate being constructed from a different material than that of the flexible conductive member;

an active battery having a third length that is shorter than the second length, having a first face that is mounted to a first face of the battery substrate, and including first and second battery terminals exposed on a second face of the active battery opposite to the first face of the active battery; and

an adhesive layer coupling the active battery and the battery substrate to the flexible conductive member such that the active battery and the flexible conductive member are electrically coupled, and such that the flexible conductive member encapsulates the first face of the active battery and the first face the battery substrate without an intervening layer, wherein the encapsulation environmentally seals the active battery from oxygen and water ingress.

13. The power source device of claim 12, wherein the active battery comprises a metallic lithium layer;

and wherein the adhesive layer directly contacts the metallic lithium layer without an intervening mica substrate layer.