STACKING-TYPED SECONDARY BATTERY PROVIDING TWO OR MORE OPERATION VOLTAGES

• US 20100190081A1
• Filed: 06/05/2007
• Published: 07/29/2010
• Est. Priority Date: 06/13/2006
• Status: Active Grant

• Current Assignee: LG Energy Solution Limited (LG Corporation)
• Original Assignee: LG Chem Limited (LG Corporation)
• Inventors: Hong, Seungtaek, Namgoong, John E., Hwang, Ra Young, Yu, Jisang, Park, Hey Woong
• Granted Patent: US 8,119,274 B2
• Time in Patent Office: Days
• US Class Current: 429/452
• CPC Class Codes: H01M 10/0413 Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes
• CPC Class Codes: H01M 10/0418 with bipolar electrodes
• CPC Class Codes: H01M 50/51 Connection only in series
• 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

Provided is a stacked-type secondary battery comprising a battery cell formed by stacking a plurality of full cells having a structure of cathode/separator/anode or bicells having a structure of cathode(anode)/separator/anode(cathode)/separator/cathode(anode), as a unit electrode assembly, wherein a cathode active material and/or an anode active material in two or more unit electrode assemblies are configured to have a different composition to induce a voltage difference and separate electrode terminals are installed in a battery case according to the voltage difference to thereby simultaneously provide two or more voltages by a single battery.

Claims

1. A stacked-type secondary battery comprising a battery cell formed by stacking a plurality of full cells having a structure of cathode/separator/anode or bicells having a structure of cathode(anode)/separator/anode(cathode)/separator/cathode(anode), as a unit electrode assembly, wherein a cathode active material and/or an anode active material in two or more unit electrode assemblies are configured to have a different composition to induce a voltage difference and separate electrode terminals are installed in a battery case according to the voltage difference to thereby simultaneously provide two or more voltages by a single battery.

2. The secondary battery according to claim 1, wherein the battery comprises a battery cell composed of two full cells having a different composition of an active material.

3. The secondary battery according to claim 1, wherein the battery comprises a battery cell composed of a combination of two C-type/A-type bicells having a different composition of an active material.

4. The secondary battery according to claim 1, wherein the voltage difference is set within the range of 3.35 to 3.95 V.

5. The secondary battery according to claim 1, wherein the battery is a lithium secondary battery.

6. The secondary battery according to claim 5, wherein the cathode active materials of the lithium secondary battery are selected from active materials having a potential difference of 3.4 to 4.0 V relative to lithium.

7. The secondary battery according to claim 5, wherein the anode active materials of the lithium secondary battery are selected from active materials having a potential difference of 0 to 1.6 V relative to lithium.

8. The secondary battery according to claim 1, wherein upon using two different unit electrode assemblies, the cathode and anode terminals of the first unit electrode assembly are installed on the top of the battery case, and the cathode and anode terminals of the second unit electrode assembly are installed on the bottom of the battery case.

9. The secondary battery according to claim 8, wherein the cathode and anode terminals of the third and fourth unit electrode assemblies are additionally installed on both lateral sides of the battery case.

10. The secondary battery according to claim 1, wherein upon using two different unit electrode assemblies, the respective cathode terminals of the first unit electrode assembly and the second unit electrode assembly are installed in a spaced state from one another on the top of the battery case, and the respective anode terminals of the unit electrode assemblies are installed in a spaced state from one another on the bottom of the battery case.