# US 10,872,729 B2 · Electrical energy storage device and method for producing an electrical 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 10,872,729 B2 - Document ID: US10872729B2 - Status: Granted - Kind: B2 - Application number: 16/182,212 - Filed: 2018-11-06 - Published: 2019-06-13 - Granted: 2020-12-22 - Earliest claimed: 2017-11-07 - Assignees: Rogers Bvba - Applicants: Rogers BVBA - Inventors: Jan Daneels; Sebastian De Boodt - Web page: https://patentgrep.com/patent/US10872729B2 ## CPC - H01G 4/38: Multiple capacitors, i.e. structural combinations of fixed capacitors - H01G 2/06: specially adapted for mounting on a printed-circuit support - H01G 4/228: Terminals - H01G 4/32: Wound capacitors - H01G 4/40: Structural combinations of fixed capacitors with other electric elements, the structure mainly consisting of a capacitor, e.g. RC combinations - H01G 2/22: Electrostatic or magnetic shielding - H01G 11/08: Structural combinations, e.g. assembly or connection, of hybrid or EDL capacitors with other electric components, at least one hybrid or EDL capacitor being the main component - H01G 11/10: Multiple hybrid or EDL capacitors, e.g. arrays or modules (housings, cases, encapsulations or mountings thereof H01G11/78) - 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) ## Abstract An electrical energy storage device (1) includes several capacitors (2), and a busbar (5) for electric power distribution, wherein the busbar (5) is covered at least partially by an insulation layer (21) and the capacitors (2) are connected to the busbar (5). The capacitors can be arranged on the busbar for reducing an inductance. In particular, the capacitors can be arranged directly on the insulation layer (21) of the busbar (5). ## Claims ### Claim 1 An electrical energy storage device (1) comprising a plurality of capacitors (2), and a busbar (5) for electric power distribution, wherein the busbar (5) is covered at least partially by an insulation layer (21) and the capacitors (2) are connected to the busbar (5), wherein for reducing an inductance of the energy storage device, the capacitors (2) are arranged directly on the insulation layer (21) of the busbar (5); and wherein at least one of said capacitors (2) is free from an insulation wrap. ### Claim 2 (depends on 1) The electrical energy storage device (1) according to claim 1, wherein the plurality of capacitors (2) comprises a plurality of uninsulated capacitors that are free from an insulation wrap. ### Claim 3 (depends on 2) The electrical energy storage device (1) according to claim 2, wherein the respective uninsulated capacitors are separated from each other by a distance of 0.5 mm to 5 mm. ### Claim 4 (depends on 1) The electrical energy storage device (1) according to claim 1, wherein the busbar (5) comprises a first conductive layer (31) and a second conductive layer (32), wherein the first conductive layer (31) and the second conductive layer (32) are insulated from each other by a further insulation layer (22). ### Claim 5 (depends on 4) The electrical energy storage device (1) according to claim 4, wherein the capacitors (2) are connected to the first conductive layer (31) and/or the second conductive layer (32) by reaching through the insulation layer (21). ### Claim 6 (depends on 4) The electrical energy storage device (1) according to claim 4, wherein the capacitors (2) are connected to the first conductive layer (31) and/or the second conductive layer (32) by a connection means (8). ### Claim 7 (depends on 6) The electrical energy storage device (1) according to claim 6, wherein the connector means (8) is configured such that for fixing the capacitors (2) in an assembled state a clamping force affects the capacitors (2). ### Claim 8 (depends on 4) The electrical energy storage device (1) according to claim 4, wherein a first set of capacitors (2) is arranged in the first row (41) and a second set of capacitors (2) is arranged in the second row (42), wherein the first set of capacitors (2) and the second set of capacitors (2) are connected to the first conductive layer (31) by a common connector means (8), the first set of capacitors (2) is connected to the first conductive layer (31) by a connection means (8) and the second set of capacitors (2) is connected to the first conductive layer (31) by a further connection means (8′) and/or the capacitors (2) of the first set of capacitors (2) and the capacitors (2) of the second set of capacitors (2) are each connected to the first conductive layer (31) by the connection means (8) or the further connection means (8′), individually. ### Claim 9 (depends on 8) The electrical energy storage device (1) according to claim 8, wherein the further connection means (8′) reaches through the insulation layer (21) and/or a further insulation layer (22). ### Claim 10 (depends on 1) The electrical energy storage device (1) according to claim 1, wherein the capacitors (2), being arranged next to each other on the busbar (5), are connected in series and/or in parallel to produce a capacitor bank. ### Claim 11 (depends on 1) The electrical energy storage device (1) according to claim 1, wherein the capacitors (2) comprise a positive contact (11) and a negative contact (12), wherein the capacitors (2) are orientated such that all negative contacts (12) or all positive contacts (11) face away from the busbar (5), all negative contacts (12) facing away from the busbar (5) are located in a first row (41) and all positive contacts (11) facing away from the busbar (5) are located in a second row (42) or a negative contact (12) of a first capacitor (2) facing away from the busbar (5) is located adjacent to a positive contact (11) of a neighbouring capacitor (2) facing away from the busbar (5) in the first row (41) and/or the second row (42). ### Claim 12 (depends on 1) The electrical energy storage device (1) according to claim 1, wherein the capacitors (2) comprise at least one of a metallized film that is wound; a dielectric comprising at least one of polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyphenylene sulphide (PPS), polypropylene (PP), polycarbonate (PC) and the like; and a positive contact (11) and a negative contact (12) made from metal being sprayed. ### Claim 13 (depends on 1) A method for producing the electrical energy storage device (1) according to claim 1, comprising the steps: providing the busbar (5), covering the busbar (5) at least partially by an insulation layer (21), arranging the plurality of capacitors (2) on the insulation layer (21) and connecting the capacitors (2) to the busbar (5). ### Claim 14 (depends on 13) The method according to claim 13, wherein the capacitors (2) are orientated on the busbar (5) such that the total inductance of the capacitors (2) is minimalized. ### Claim 15 (depends on 13) The method according to claim 13, wherein the capacitors (2) are located at an edge (7) or rim of the busbar (5). ### Claim 16 (depends on 13) The method according to claim 13, wherein the electrical energy storage device (1) is arranged at least partially in a casing.