# US 10,319,960 B2 · Cap assembly of power battery > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,319,960 B2 - Document ID: US10319960B2 - Status: Granted - Kind: B2 - Application number: 14/989,516 - Filed: 2016-01-06 - Published: 2016-07-14 - Granted: 2019-06-11 - Earliest claimed: 2015-01-12 - Assignees: Ningde Amperex Technology Limited - Applicants: Ningde Amperex Technology Limited - Inventors: Rulai Cai; Quankun Li; Peng Wang; Pinghua Deng; Peng Yu - Web page: https://patentgrep.com/patent/US10319960B2 ## CPC - H01M 50/147: Lids or covers - H01M 50/55: on the same side of the cell - H01M 50/553: Terminals adapted for prismatic, pouch or rectangular cells - H01M 2200/00: Safety devices for primary or secondary batteries - 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 cap assembly of a power battery comprises: a cap plate, a first electrode terminal provided to the cap plate, a second electrode terminal provided to the cap plate and electrically insulated from the cap plate, and a resistance member electrically connected to the cap plate and the first electrode terminal. The resistance member comprises: a heat-resistant insulating base body positioned between the cap plate and the first electrode terminal; and a heat-resistant metal layer provided to the heat-resistant insulating base body. The heat-resistant metal layer and the cap plate and the first electrode terminal are electrically connected to form a conductive path, the conductive path passes along the heat-resistant insulating base body positioned between the cap plate and the first electrode terminal. The formed conductive path is a curved path, therefore the resistance value of the resistance member can be controlled by controlling the conductive path. ## Claims ### Claim 1 A cap assembly of a power battery, comprising: a cap plate; a first electrode terminal provided to the cap plate; a second electrode terminal provided to the cap plate and electrically insulated from the cap plate; and a resistance member electrically connected to the cap plate and the first electrode terminal; the resistance member comprising: a heat-resistant insulating base body positioned between the cap plate and the first electrode terminal; and a heat-resistant metal layer provided to the heat-resistant insulating base body; wherein the resistance member further comprises: a base body conductor provided to the heat-resistant insulating base body; the number of the heat-resistant insulating base bodies is at least one; each heat-resistant insulating base body is provided with a receiving hole, and an upper side and a lower side of each heat-resistant insulating base body along an axial direction each are provided with one heat-resistant metal layer; the number of the base body conductors is greater than or equal to the number of the heat-resistant insulating base bodies, each base body conductor is inserted into the receiving hole of the corresponding heat-resistant insulating base body and is electrically connected to the two heat-resistant metal layers respectively provided on the upper side and the lower side of the corresponding heat-resistant insulating base body along the axial direction; when the number of the heat-resistant insulating base bodies is more than one, all the heat-resistant insulating base bodies are provided along a vertical direction, and two adjacent heat-resistant insulating base bodies along the vertical direction share one heat-resistant metal layer provided between the two adjacent heat-resistant insulating base bodies; wherein the resistance member further comprises: a metal coating provided along the vertical direction and electrically connected to an outer side of the heat-resistant metal layer positioned at an outermost side of the resistance member along the vertical direction; all the base body conductors, all the heat-resistant metal layers, all the metal coatings, the cap plate and the first electrode terminal are electrically connected to form a conductive path, the conductive path passes along all the heat-resistant insulating base bodies positioned between the cap plate and the first electrode terminal; wherein the metal coating is provided with a recessed groove, the recessed groove receives the heat-resistant metal layer positioned at the outermost side of the resistance member along the vertical direction. ### Claim 2 (depends on 1) The cap assembly of the power battery according to claim 1, wherein the cap assembly of the power battery further comprises: a circlip positioned above the heat-resistant insulating base body of the resistance member, clipped to and electrically connected to the first electrode terminal, and electrically connected to the heat-resistant metal layer of the resistance member. ### Claim 3 (depends on 1) The cap assembly of the power battery according to claim 1, wherein the cap assembly of the power battery further comprises: a connecting block positioned above the heat-resistant insulating base body of the resistance member, fixed to and electrically connected to the first electrode terminal, and electrically connected to the heat-resistant metal layer of the resistance member. ### Claim 4 A cap assembly of a power battery, comprising: a cap plate; a first electrode terminal provided to the cap plate; a second electrode terminal provided to the cap plate and electrically insulated from the cap plate; and a resistance member electrically connected to the cap plate and the first electrode terminal; the resistance member comprising: a heat-resistant insulating base body positioned between the cap plate and the first electrode terminal; and a heat-resistant metal layer provided to the heat-resistant insulating base body; wherein the resistance member further comprises: a base body conductor provided to the heat-resistant insulating base body; the number of the heat-resistant insulating base bodies is at least one; each heat-resistant insulating base body is provided with a receiving hole, and an upper side and a lower side of each heat-resistant insulating base body along an axial direction each are provided with one heat-resistant metal layer; the number of the base body conductors is greater than or equal to the number of the heat-resistant insulating base bodies, each base body conductor is inserted into the receiving hole of the corresponding heat-resistant insulating base body and is electrically connected to the two heat-resistant metal layers respectively provided on the upper side and the lower side of the corresponding heat-resistant insulating base body along the axial direction; when the number of the heat-resistant insulating base bodies is more than one, all the heat-resistant insulating base bodies are provided along a vertical direction, and two adjacent heat-resistant insulating base bodies along the vertical direction share one heat-resistant metal layer provided between the two adjacent heat-resistant insulating base bodies; wherein the resistance member further comprises: a metal coating provided along the vertical direction and electrically connected to an outer side of the heat-resistant metal layer positioned at an outermost side of the resistance member along the vertical direction; wherein the resistance member further comprises: an insulative piece correspondingly provided along the vertical direction, provided between the heat-resistant metal layer positioned at the outermost side of the resistance member along the vertical direction and the corresponding metal coating, and provided with an accommodating hole; and an insulative piece conductor inserted into the accommodating hole of the insulative piece and electrically connected to the heat-resistant metal layer positioned at the outermost side of the resistance member along the vertical direction and the corresponding metal coating; all the base body conductors, all the heat-resistant metal layers, all the metal coatings, all the insulative piece conductors, the cap plate and the first electrode terminal are electrically connected to form a conductive path, the conductive path passes along all the heat-resistant insulating base bodies positioned between the cap plate and the first electrode terminal. ### Claim 5 (depends on 4) The cap assembly of the power battery according to claim 4, wherein the insulative piece is provided with a recessed portion receiving the corresponding heat-resistant metal layer. ### Claim 6 (depends on 1) The cap assembly of the power battery according to claim 1, wherein the heat-resistant metal layer is comprised of a plurality of curved metal wires. ### Claim 7 (depends on 4) The cap assembly of the power battery according to claim 4, wherein the heat-resistant metal layer is comprised of a plurality of curved metal wires. ### Claim 8 (depends on 1) The cap assembly of the power battery according to claim 1, wherein the cap assembly of the power battery further comprises: a reverse plate provided to the cap plate and electrically connected to the cap plate; and a short-circuit protection conductive plate positioned above the reverse plate and electrically connected to the second electrode terminal.