# US 12,183,511 B2 · Energy storage device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,183,511 B2 - Document ID: US12183511B2 - Status: Granted - Kind: B2 - Application number: 17/799,167 - Filed: 2020-12-18 - Published: 2023-03-16 - Granted: 2024-12-31 - Earliest claimed: 2020-02-14 - Assignees: Ls Materials Co., Ltd. - Applicants: Ls Materials Co., Ltd. - Inventors: Kyeong Hoon Park; Jung Gul Lee - Web page: https://patentgrep.com/patent/US12183511B2 ## CPC - H01G 11/66: Current collectors - H01G 11/80: Gaskets; Sealings - H01G 11/74: Terminals, e.g. extensions of current collectors - H01G 11/78: Cases; Housings; Encapsulations; Mountings - H01G 11/82: Fixing or assembling a capacitive element in a housing, e.g. mounting electrodes, current collectors or terminals in containers or encapsulations - H01M 50/103: prismatic or rectangular (H01M50/109, H01M50/11 take precedence) - H01M 50/107: having curved cross-section, e.g. round or elliptic (H01M50/103, H01M50/109, H01M50/11 take precedence) - H01M 50/131: characterised by physical properties, e.g. gas permeability, size or heat resistance - H01M 50/147: Lids or covers - H01M 50/176: for prismatic or rectangular cells (H01M50/181 takes precedence) - H01M 50/183: Sealing members - H01M 50/184: characterised by their shape or structure - H01M 50/188: the sealing members being arranged between the lid and terminal - H01M 50/55: on the same side of the cell - H01M 50/553: Terminals adapted for prismatic, pouch or rectangular cells - H01G 11/34: characterised by carbonisation or activation of carbon - Y02E 60/10: Energy storage using batteries - H01G: CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE (selection of specified materials as dielectric H01B3/00; capacitors having potential barriers H10D1/62, H10K10/10) - 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 The present disclosure relates to an energy storage device comprising: a housing for accommodating an electrolyte; an electrode element accommodated inside the housing; a case coupled to one side of the housing; and an electrode terminal inserted into the case so as to be electrically connected to the electrode element, wherein the case comprises: a base part having a through-hole into which the electrode terminal is inserted; and a sealing part coupled to the base part so as to seal the space between the base part and the electrode terminal, and the sealing part includes a terminal sealing member located at the through-hole so as to come into close contact with the electrode terminal, thereby sealing the space between the base part and the electrode terminal. ## Claims ### Claim 1 An energy storage device comprising: a housing configured to accommodate an electrolyte; an electrode element accommodated in the housing; a case coupled to one side of the housing; and an electrode terminal inserted into the case and electrically connected to the electrode element, wherein: the case includes: a base part in which a through-hole is formed, the through-hole being configured to allow the electrode terminal to be inserted thereinto; and a sealing part coupled to the base part, the sealing part being configured to seal a gap between the base part and the electrode terminal, the housing includes a curling member hooked on and supported by the sealing part, the sealing part includes a terminal sealing member positioned in the through-hole and pressed against the electrode terminal to seal the gap between the base part and the electrode terminal, an upper surface sealing member positioned on an upper surface of the base part, and a sealing protrusion protruding upward from the upper surface sealing member, the sealing protrusion is inserted into the curling member and supports the curling member by catching, and an inner surface of the curling member directly contacts the sealing protrusion. ### Claim 2 (depends on 1) The energy storage device of claim 1, wherein the sealing part includes: a side surface sealing member positioned on a side surface of the base part; and a lower surface sealing member positioned on a lower surface of the base part. ### Claim 3 (depends on 1) The energy storage device of claim 1, wherein: the terminal sealing member is formed to have a greater thickness than the upper surface sealing member. ### Claim 4 (depends on 1) The energy storage device of claim 1, wherein the base part is formed of a material having a greater strength than Bakelite and lower absorptiveness to the electrolyte than Bakelite. ### Claim 5 (depends on 1) The energy storage device of claim 1, comprising: a plurality of upper surface protrusions protruding from an upper surface of the base part; and the upper surface protrusions are disposed apart from each other. ### Claim 6 (depends on 1) The energy storage device of claim 1, comprising a support protrusion protruding from a central portion of an upper surface of the base part. ### Claim 7 (depends on 1) The energy storage device of claim 1, comprising a communication hole formed to pass through the base part, wherein the sealing part includes: a lower surface sealing member positioned on a lower surface of the base part; and a connection sealing member formed in the communication hole to connect the upper surface sealing member and the lower surface sealing member. ### Claim 8 (depends on 1) The energy storage device of claim 1, wherein: the base part includes a support protrusion which supports the curling member; the sealing part includes a support hole into which the support protrusion is inserted; and the support protrusion is exposed to the outside of the sealing part through the support hole and supports the curling member. ### Claim 9 (depends on 1) The energy storage device of claim 1, wherein: the curling member is supported by the sealing protrusion positioned on an upper surface of the case; and the housing includes a beading member protruding to support a lower surface of the case. ### Claim 10 (depends on 1) The energy storage device of claim 1, wherein: the base part includes a compression groove formed to be connected to the through-hole; the sealing part includes a compression sealing member coupled to the base part to cover the compression groove; and the compression sealing member is compressed by the electrode terminal coupled to the case. ### Claim 11 (depends on 1) The energy storage device of claim 1, comprising a plurality of reinforcing protrusions protruding from at least one of an upper surface of the base part and a lower surface of the base part.