# US 8,465,870 B2 · Secondary battery with improved capacity and installation convenience > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,465,870 B2 - Document ID: US8465870B2 - Status: Granted - Kind: B2 - Application number: 12/591,361 - Filed: 2009-11-17 - Published: 2010-06-03 - Granted: 2013-06-18 - Earliest claimed: 2008-12-03 - Assignees: Samsung SDI Co., Ltd. - Applicants: Seok Koh; Seokryun Park; Youngho Kim - Inventors: Seok Koh; Seokryun Park; Youngho Kim - Web page: https://patentgrep.com/patent/US8465870B2 ## CPC - H01M 10/42: Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells (H01M10/60 takes precedence) - H01M 10/4257: {Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries} - H01M 10/486: {for measuring temperature} - H01M 50/528: Fixed electrical connections, i.e. not intended for disconnection - H01M 50/586: inside the batteries, e.g. incorrect connections of electrodes - H01M 2200/106: PTC - Y02E 60/10: Energy storage using batteries - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A secondary battery includes a bare cell having an electrode terminal and a cap plate, and a protective circuit module protecting the bare cell. The protective circuit module includes a first module positioned on an upper surface of the bare cell, a second module positioned on a lower surface of the bare cell and having a charge/discharge terminal, and a third module positioned on a side surface of the bare cell and electrically connecting the first module to the second module. ## Claims ### Claim 1 A secondary battery, comprising: a bare cell having an electrode terminal and a cap plate; and a protective circuit module protecting the bare cell; wherein the protective circuit module includes: a first module positioned on an upper surface of the bare cell; a second module positioned on a lower surface of the bare cell and having a charge/discharge terminal; and a third module positioned on a side surface of the bare cell and electrically connecting the first module and the second module; wherein the second module includes a second flexible printed circuit board positioned in contact with the lower surface of the bare cell, and the charge/discharge terminal is positioned on the second flexible printed circuit board. ### Claim 2 (depends on 1) The secondary battery according to claim 1, wherein the first module includes: a first flexible printed circuit board positioned in contact with the upper surface of the bare cell and having a terminal hole formed at a position corresponding to the electrode terminal for insertion of the electrode terminal into the terminal hole; a positive temperature coefficient (PTC) region positioned on an upper surface of the first flexible printed circuit board and electrically connected to the electrode terminal; a lead plate positioned on one side of the upper surface of the first flexible printed circuit board and electrically connected to the cap plate; and a protective circuit device positioned on the upper surface of the first flexible printed circuit board. ### Claim 3 (depends on 1) The secondary battery according to claim 1, wherein the third module comprises a third flexible printed circuit board positioned in contact with the side surface of the bare cell. ### Claim 4 (depends on 1) The secondary battery according to claim 1, wherein the protective circuit module has a rectangular “C” shape. ### Claim 5 (depends on 1) The secondary battery according to claim 1, further comprising an insulating tape positioned between the bare cell and the protective circuit module. ### Claim 6 (depends on 1) The secondary battery according to claim 1, further comprising a holder positioned between the side surface of the bare cell and the third module, wherein a first surface of the holder facing the third module is flat. ### Claim 7 (depends on 6) The secondary battery according to claim 6, wherein a second surface of the holder facing the side surface of the bare cell has a curvature which is substantially identical to a curvature of the side surface of the bare cell. ### Claim 8 (depends on 1) The secondary battery according to claim 1, further comprising a lower case positioned on the first module and an upper case positioned on the second module. ### Claim 9 A secondary battery, comprising: a bare cell having an electrode terminal and a cap plate; a protective circuit module for protecting the bare cell, the protective circuit module including a first module positioned on an upper surface of the bare cell and a second module positioned on a side surface of the bare cell and having a charge/discharge terminal; and a holder disposed between the second module and the side surface of the bare cell for entirely covering the side surface of the bare cell, wherein a first surface of the holder spaced apart from the bare cell is flat. ### Claim 10 (depends on 9) The secondary battery according to claim 9, wherein the first module includes: a first flexible printed circuit board positioned in contact with the upper surface of the bare cell and having a terminal hole formed at a position corresponding to the electrode terminal for insertion of the electrode terminal into the terminal hole; a PTC region positioned on an upper surface of the first flexible printed circuit board and electrically connected to the electrode terminal; a lead plate positioned on one side of the upper surface of the first flexible printed circuit board and electrically connected to the cap plate; and a protective circuit device positioned on the upper surface of the first flexible printed circuit board. ### Claim 11 (depends on 9) The secondary battery according to claim 9, wherein the second module includes a second flexible printed circuit board positioned in contact with the first surface of the holder, and the charge/discharge terminal is positioned on the second flexible printed circuit board. ### Claim 12 (depends on 9) The secondary battery according to claim 9, wherein the protective circuit module has an “L” shape. ### Claim 13 (depends on 9) The secondary battery according to claim 9, wherein a second surface of the holder facing the side surface of the bare cell has a curvature which is substantially identical to a curvature of the side surface of the bare cell. ### Claim 14 (depends on 9) The secondary battery according to claim 9, further comprising an insulating tape positioned between the upper surface of the bare cell and the first module. ### Claim 15 A secondary battery, comprising: a bare cell having an electrode terminal and a cap plate; and a protective circuit module protecting the bare cell; wherein the protective circuit module includes: a first module positioned on an upper surface of the bare cell; a second module positioned on a lower surface of the bare cell and having a charge/discharge terminal; and a third module positioned on a side surface of the bare cell and electrically connecting the first module and the second module; said secondary battery further comprising a holder positioned between the side surface of the bare cell and the third module for entirely covering the side surface of the bare cell, wherein a first surface of the holder facing the third module is flat. ### Claim 16 (depends on 15) The secondary battery according to claim 15, wherein a second surface of the holder facing the side surface of the bare cell has a curvature which is substantially identical to a curvature of the side surface of the bare cell.