# US 12,759,405 B2 · High-voltage component and methods of use > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,759,405 B2 - Document ID: US12759405B2 - Status: Granted - Kind: B2 - Application number: 19/036,513 - Filed: 2025-01-24 - Published: 2025-08-07 - Granted: 2026-10-13 - Earliest claimed: 2024-02-01 - Assignees: Volvo Truck Corporation - Applicants: Volvo Truck Corporation - Inventors: Pranav Arya; Ricard Blanc; Toni Cacic - Web page: https://patentgrep.com/patent/US12759405B2 ## CPC - B60L 3/0053: {relating to fuel cells} - B60L 3/0046: {relating to electric energy storage systems, e.g. batteries or capacitors} - G07C 5/0808: {Diagnosing performance data (testing of vehicles G01M17/00; testing of electrical installation on vehicles G01R31/005)} - B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES - G07C: TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE ## Abstract A high-voltage component and a method of use are provided for an electric, fuel cell, or hybrid vehicle. The HV component is reconfigurable to be included in a centralized HVIL system or in a de-centralized HVIL system. The HV component comprises an internal Hazardous Voltage Interlock Loop system configured to detect an internal HVIL fault; a first relay element configured to enable or disable the HV component; a second relay element configured to be opened to inform a vehicle electronic control unit about the internal HVIL fault; and an HVIL logic unit that is configured to be enabled, when the HV component is reconfigured for the centralized HVIL system, or completely or partially disabled, when the HV component is reconfigured for the de-centralized HVIL system. The first relay element may be opened with a delay after an internal HVIL fault or an external HVIL fault is detected. ## Claims ### Claim 1 A high-voltage, HV, component for a vehicle, comprising: an internal Hazardous Voltage Interlock Loop, HVIL, system unit comprising a signal continuity detection circuit and configured to detect a breach of continuity of a signal in the signal continuity detection circuit as an internal HVIL fault and to output information on the internal HVIL fault as an internal HVIL fault signal; a first relay element configured to move from a closed first relay element configuration to an open first relay element configuration to thereby disable the HV component; a second relay element configured to be positioned in an external HVIL signal communication path that is connectable to an external HVIL system, the second relay element being configured to move from a closed second relay element configuration to an open second relay element configuration to thereby inform a vehicle electronic control unit, ECU, of the internal HVIL fault; and an HVIL logic unit that comprises an HVIL fault response control function and is configured to be enabled or at least partially disabled, and configured to, when enabled, use the HVIL fault response control function to: responsive to receiving the internal HVIL fault signal from the HVIL system unit, after a first delay period, control the second relay element to move to the open second relay element configuration to thereby inform the vehicle ECU of the internal HVIL fault and, after a second delay period, control the first relay element to move to the open first relay element configuration to thereby disable the HV component; and responsive to receiving, via the external HVIL signal communication path, an external HVIL fault signal informing the HVIL logic unit of an external HVIL fault, after a third delay period, control the first relay element to move to the open first relay element configuration to thereby disable the HV component. ### Claim 2 (depends on 1) The HV component of claim 1, wherein the second delay period depends on at least one of an operating mode of the vehicle and a type of the HV component. ### Claim 3 (depends on 2) The HV component of claim 2, wherein, when the operating mode of the vehicle comprises a standing mode, the second delay period is shorter than when the operating mode of the vehicle comprises a moving mode. ### Claim 4 (depends on 1) The HV component of claim 1, wherein the second delay period is longer than the first delay period. ### Claim 5 (depends on 1) The HV component of claim 1, wherein the third delay period depends on at least one of an operating mode of the vehicle and a type of the HV component. ### Claim 6 (depends on 5) The HV component of claim 5, wherein, when the operating mode of the vehicle comprises a standing mode, the third delay period is shorter than when the operating mode of the vehicle comprises a moving mode. ### Claim 7 (depends on 1) The HV component of claim 1, comprising an HV component control unit that is configured to, when the HVIL logic unit is completely or partially disabled, generate and send, to a vehicle master controller of the vehicle, a message informing the vehicle master controller of the internal HVIL fault signal. ### Claim 8 (depends on 7) The HV component of claim 7, wherein the HV component control unit is configured to receive, in response to the message, an instruction from the vehicle master controller, regarding an action responsive to the internal HVIL fault signal. ### Claim 9 (depends on 1) The HV component of claim 1, comprising a first signal detector configured to be coupled to the external HVIL signal communication path to detect the external HVIL fault and to provide the external HVIL fault signal to the HVIL logic unit of the HV component. ### Claim 10 (depends on 1) The HV component of claim 1, wherein the HV component is reconfigurable to be included in a centralized HVIL system and reconfigurable to be included in a de-centralized HVIL system, wherein the HVIL logic unit is enabled when the HV component is reconfigured to be connected to the centralized HVIL system and the HVIL logic unit is partially or completely disabled when the HV component is reconfigured to be connected to the de-centralized HVIL system. ### Claim 11 (depends on 1) The HV component of claim 1, wherein the HV component comprises a fuel cell system. ### Claim 12 (depends on 1) A high-voltage, HV, component assembly for a vehicle, the HV component assembly comprising at least one HV component of claim 1. ### Claim 13 (depends on 12) The HV component assembly of claim 12, comprising an external Hazardous Voltage Interlock Loop, HVIL, system comprising an external signal continuity detection system configured to be communicatively coupled, via an external HVIL signal communication path, to a corresponding HVIL logic unit of each of the at least one HV component, whereby an HVIL fault on any HV component of the at least one HV component is communicated to all other HV components of the at least one HV component. ### Claim 14 (depends on 1) A vehicle comprising at least one HV component of claim 1. ### Claim 15 (depends on 12) A vehicle comprising a HV component assembly of claim 12. ### Claim 16 A method for configuring a high-voltage, HV, component for a vehicle, the HV component comprising an internal Hazardous Voltage Interlock Loop, HVIL, system unit configured to detect an internal HVIL fault and to output information on the internal HVIL fault as an internal HVIL fault signal, the method comprising: configuring the HV component so as to enable an HVIL fault response control function of an HVIL logic unit of the HV component, wherein the HVIL logic unit is configured to be enabled or at least partially disabled; wherein the HV component further comprises: a first relay element configured to move from a closed first relay element configuration to an open first relay element configuration to thereby disable the HV component; and a second relay element configured to be positioned in an external HVIL signal communication path that is connectable to an external HVIL system, the second relay element being configured to move from a closed second relay element configuration to an open second relay element configuration to thereby inform a vehicle electronic control unit, ECU, of the internal HVIL fault; and wherein the enabling of the HVIL fault response control function causes the HVIL logic unit to be able to: responsive to receiving the internal HVIL fault signal from the HVIL system unit, after a first delay period, control the second relay element to move to the open second relay element configuration to thereby inform the vehicle ECU of the internal HVIL fault and, after a second delay period, control the first relay element to move to the open first relay element configuration to thereby disable the HV component; and responsive to receiving, via the external HVIL signal communication path, an external HVIL fault signal informing the HVIL logic unit of an external HVIL fault, after a third delay period, control the first relay element to move to the open first relay element configuration to thereby disable the HV component.