# US 11,999,260 B2 · Energy monitoring system for a vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,999,260 B2 - Document ID: US11999260B2 - Status: Granted - Kind: B2 - Application number: 17/660,923 - Filed: 2022-04-27 - Published: 2022-11-24 - Granted: 2024-06-04 - Earliest claimed: 2021-05-18 - Assignees: Volvo Car Corporation - Applicants: Volvo Car Corporation - Inventors: Georgios Tsengenes - Web page: https://patentgrep.com/patent/US11999260B2 ## CPC - B60L 53/14: Conductive energy transfer - B60L 58/15: Preventing overcharging - B60L 3/0023: {Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train} - B60L 3/0046: {relating to electric energy storage systems, e.g. batteries or capacitors} - B60L 3/12: Recording operating variables {; Monitoring of operating variables} - B60L 50/40: using propulsion power supplied by capacitors - B60L 53/20: characterised by converters located in the vehicle - B60L 53/22: Constructional details or arrangements of charging converters specially adapted for charging electric vehicles - B60L 53/24: Using the vehicle's propulsion converter for charging - G01R 19/16576: {comparing DC or AC voltage with one threshold (G01R19/16514, G01R19/16519, G01R19/16528, G01R19/16533 and G01R19/1659 take precedence)} - H02J 7/345: {using capacitors as storage or buffering devices} - H02J 7/40: characterised by the exchange of charge or discharge related data - H02J 7/485: {with provisions for charging different types of batteries} - H02J 7/80: including monitoring or indicating arrangements - B60L 2210/10: DC to DC converters - B60L 2210/30: AC to DC converters - B60L 2240/52: related to converters - B60L 2240/527: Voltage - B60L 2260/162: of electrical cells or capacitors - H02J 2207/20: Charging or discharging characterised by the power electronics converter - Y02T 10/70: Energy storage systems for electromobility, e.g. batteries - Y02T 10/7072: Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors - 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 - G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12) - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract The present disclosure relates to an energy monitoring system for a vehicle, a vehicle comprising such an energy monitoring system and a method for manufacturing such an energy monitoring system. The energy monitoring system comprises an on-board battery charging system, a traction voltage system and a control unit. The traction voltage system is connected to the on-board battery charging system and the control unit is configured to transfer energy stored in the traction voltage system to the on-board battery charging system in case an energy level of the traction voltage system exceeds a defined threshold. ## Claims ### Claim 1 An energy monitoring system for a vehicle, the energy monitoring system comprising: an on-board battery charging system; a traction inverter system, wherein the traction inverter system is connected to the on-board battery charging system; and a control unit configured to transfer energy stored in the traction inverter system to the on-board battery charging system in case response to determining that an energy level of the traction inverter system exceeds a defined threshold. ### Claim 2 (depends on 1) The energy monitoring system of claim 1, further comprising: an energy storage system, and wherein the traction inverter system is further connected to the energy storage system. ### Claim 3 (depends on 2) The energy monitoring system of claim 2, wherein the control unit is further configured to transfer energy from the traction inverter system to the on-board battery charging system only in response to determining that the energy storage system is disconnected from the traction inverter system. ### Claim 4 (depends on 1) The energy monitoring system of claim 1, wherein the traction inverter system comprises at least one traction capacitor. ### Claim 5 (depends on 1) The energy monitoring system of claim 1, wherein the control unit is further configured to monitor an energy level of the traction capacitor. ### Claim 6 (depends on 1) The energy monitoring system of claim 1, wherein the on-board battery charging system comprises a bidirectional converter unit, through which energy stored in the traction inverter system is transferred to the on-board battery charging system. ### Claim 7 (depends on 6) The energy monitoring system of claim 6, wherein the bidirectional converter unit is a bidirectional DC/DC converter unit. ### Claim 8 (depends on 1) The energy monitoring system of claim 1, wherein the on-board battery charging system further comprises: at least one internal capacitor, configured to store the energy transferred from the traction inverter system. ### Claim 9 (depends on 8) The energy monitoring system of claim 8, wherein the at least one internal capacitor is integrated into a power factor correction unit. ### Claim 10 (depends on 9) The energy monitoring system of claim 9, wherein the power factor correction unit is configured to utilize the energy stored in the internal capacitor prior to initiate an AC charging. ### Claim 11 (depends on 1) The energy monitoring system of claim 1, wherein the on-board battery charging system is always powered on. ### Claim 12 A vehicle comprising: an energy monitoring system comprising: an on-board battery charging system; a traction inverter system, wherein the traction inverter system is connected to the on-board battery charging system; and a control unit configured to transfer energy stored in the traction inverter system to the on-board battery charging system in response to determining that an energy level of the traction inverter system exceeds a defined threshold, the vehicle being a battery electric vehicle or a hybrid electric vehicle. ### Claim 13 (depends on 12) The vehicle of claim 12, wherein the control unit is further configured to start an energy transfer from the traction inverter system to the on-board battery charging system in response to determining that an energy storage system is disconnected from the traction inverter system. ### Claim 14 (depends on 12) The vehicle of claim 12, wherein the traction inverter system comprises at least one traction capacitor. ### Claim 15 (depends on 14) The vehicle of claim 14, wherein the control unit is further configured to monitor the energy level of the traction capacitor. ### Claim 16 (depends on 12) The vehicle of claim 12, wherein the on-board battery charging system comprises a bidirectional converter unit, through which energy stored in the traction inverter system is transferred to the on-board battery charging system. ### Claim 17 A method for manufacturing an energy monitoring system for a vehicle, comprising: providing a traction inverter system providing an on-board battery charging system; providing a control unit; connecting the on-board battery charging system with the traction inverter system; and configuring the control unit to transfer energy stored in the traction inverter system to the on-board battery charging system in response to determining that an energy level of the traction inverter system exceeds a defined threshold. ### Claim 18 A method for operating an energy monitoring system in a vehicle, the method comprising: receiving, by a control unit, information about an energy level of a traction voltage inverter system of the energy monitoring system; disconnecting, by the control unit, the traction inverter system from an energy storage system of the energy monitoring system; and transferring, by the control unit, energy stored in the traction inverter system to an on-board battery charging system of the energy monitoring system in response to determining that an energy level of the traction inverter system exceeds a defined threshold. ### Claim 19 (depends on 18) The method of claim 18, wherein the traction inverter system comprises at least one traction capacitor. ### Claim 20 (depends on 19) The method of claim 19, further comprising monitoring, by the control unit, an energy level of the traction capacitor.