Patents by Inventor Daniel Midholm
Daniel Midholm has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10071632Abstract: An electrical system for a vehicle having an internal combustion engine provided with a start/stop system includes a primary battery connectible to an engine starter motor, an alternator and an electrical load in parallel with one another and selectively connectible in parallel with the primary battery via a first switch, and a third source of electrical energy selectively connectible in parallel with the alternator via a second switch. A DC/DC converter may be arranged in parallel with the alternator for selectively charging the third source of electrical energy via the second switch. A secondary battery may be arranged in parallel with the alternator.Type: GrantFiled: August 23, 2012Date of Patent: September 11, 2018Assignee: Volvo Car CorporationInventors: Torbjoern Larsson, Patrik Larsson, Daniel Midholm, Fredrik Ulmhage
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Patent number: 10036360Abstract: An electrical system for a vehicle having an internal combustion engine with start/stop capability includes a primary battery connectible to an engine starter motor; a secondary battery, an alternator, and an electrical load in parallel with one another and selectively connectible in parallel with the primary battery by a charge switch; in parallel with the secondary battery, a DC/DC converter in series with a third electrical energy source; and a bypass switch operable to selectively bypass the DC/DC converter. The bypass switch allows for selective bypassing the DC/DC converter and charging/discharging of the third electrical energy source during start/stop operation, to ensure a sufficient voltage level over the additional vehicle electrical loads when the internal combustion engine and consequently the alternator are not running.Type: GrantFiled: June 29, 2017Date of Patent: July 31, 2018Assignee: Volvo Car CorporationInventors: Oerjan Spjuth, Torbjoern Larsson, Daniel Midholm, Fredrik Ulmhage
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Patent number: 10023066Abstract: A method for determining a status of a vehicle battery includes determining an initial temperature and an initial state of charge of the battery, determining a current threshold value based on the initial temperature and the initial state of charge of the battery, starting the vehicle engine, charging the battery for a predetermined charging period t1, measuring two charging currents, I1 and I2, to the battery at two predetermined points in time during the charging period t1, determining an expected current value at a time t3=t1+t2 based on the measured charging currents, comparing the expected current value with the current threshold value, and determining the battery is faulty if the expected current value is lower than the current threshold value.Type: GrantFiled: September 12, 2016Date of Patent: July 17, 2018Assignee: Volvo Car CorporationInventors: Torbjorn Larsson, Alexander Engstrom, Linus Franzen, Mats Thorngren, Fabian Fogelberg, Pelle Thorson, Petter Almhagen, Emil Wall, Daniel Midholm
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Publication number: 20170298891Abstract: An electrical system for a vehicle having an internal combustion engine with start/stop capability includes a primary battery connectible to an engine starter motor; a secondary battery, an alternator, and an electrical load in parallel with one another and selectively connectible in parallel with the primary battery by a charge switch; in parallel with the secondary battery, a DC/DC converter in series with a third electrical energy source; and a bypass switch operable to selectively bypass the DC/DC converter. The bypass switch allows for selective bypassing the DC/DC converter and charging/discharging of the third electrical energy source during start/stop operation, to ensure a sufficient voltage level over the additional vehicle electrical loads when the internal combustion engine and consequently the alternator are not running.Type: ApplicationFiled: June 29, 2017Publication date: October 19, 2017Applicant: Volvo Car CorporationInventors: Oerjan SPJUTH, Torbjoern LARSSON, Daniel MIDHOLM, Fredrik ULMHAGE
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Patent number: 9752547Abstract: An electrical system for a vehicle having an internal combustion engine with start/stop capability includes a primary battery connectible to an engine starter motor; a secondary battery, an alternator, and an electrical load in parallel with one another and selectively connectible in parallel with the primary battery by a charge switch; in parallel with the secondary battery, a DC/DC converter in series with a third electrical energy source; and a bypass switch operable to selectively bypass the DC/DC converter. The bypass switch allows for selective bypassing the DC/DC converter and charging/discharging of the third electrical energy source during start/stop operation, to ensure a sufficient voltage level over the additional vehicle electrical loads when the internal combustion engine and consequently the alternator are not running.Type: GrantFiled: June 19, 2012Date of Patent: September 5, 2017Assignee: Volvo Car CorporationInventors: Oerjan Spjuth, Torbjoern Larsson, Daniel Midholm, Fredrik Ulmhage
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Publication number: 20170080819Abstract: A method for determining a status of a vehicle battery includes determining an initial temperature and an initial state of charge of the battery, determining a current threshold value based on the initial temperature and the initial state of charge of the battery, starting the vehicle engine, charging the battery for a predetermined charging period t1, measuring two charging currents, I1 and I2, to the battery at two predetermined points in time during the charging period t1, determining an expected current value at a time t3=t1+t2 based on the measured charging currents, comparing the expected current value with the current threshold value, and determining the battery is faulty if the expected current value is lower than the current threshold value.Type: ApplicationFiled: September 12, 2016Publication date: March 23, 2017Applicant: VOLVO CAR CORPORATIONInventors: Torbjorn LARSSON, Alexander ENGSTROM, Linus FRANZEN, Mats THORNGREN, Fabian FOGELBERG, Pelle THORSON, Petter ALMHAGEN, Emil WALL, Daniel MIDHOLM
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Patent number: 9272625Abstract: An electrical power supply system for powering an electric load of a vehicle includes a main battery, a support battery and a battery control module. The battery control module includes a first terminal for connection to the main battery, a second terminal for connection to the support battery and a third terminal for connecting to the electric load. A switch is arranged between said second terminal and said third terminal. The battery control module is arranged to connect the support battery to the load by turning the switch conducting in case the voltage at the third terminal drops below a predetermined voltage. The system provides the automatic activation of a support energy source when the output voltage falls below a specified voltage threshold. The support battery supports the main battery when needed or acts as a redundant power source.Type: GrantFiled: December 20, 2012Date of Patent: March 1, 2016Assignee: Volvo Car CorporationInventors: Mikael Sonesson, Torbjoern Larsson, Jonas Dahlloef, Peter Gunberg, Daniel Midholm
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Publication number: 20130229049Abstract: An electrical system for a vehicle having an internal combustion engine provided with a start/stop system includes a primary battery connectible to an engine starter motor, an alternator and an electrical load in parallel with one another and selectively connectible in parallel with the primary battery via a first switch, and a third source of electrical energy selectively connectible in parallel with the alternator via a second switch. A DC/DC converter may be arranged in parallel with the alternator for selectively charging the third source of electrical energy via the second switch. A secondary battery may be arranged in parallel with the alternator.Type: ApplicationFiled: August 23, 2012Publication date: September 5, 2013Applicant: VOLVO CAR CORPORATIONInventors: Torbjoern Larsson, Patrik Larsson, Daniel Midholm, Fredrik Ulmhage
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Publication number: 20120330538Abstract: An electrical system for a vehicle having an internal combustion engine with start/stop capability includes a primary battery connectible to an engine starter motor; a secondary battery, an alternator, and an electrical load in parallel with one another and selectively connectible in parallel with the primary battery by a charge switch; in parallel with the secondary battery, a DC/DC converter in series with a third electrical energy source; and a bypass switch operable to selectively bypass the DC/DC converter. The bypass switch allows for selective bypassing the DC/DC converter and charging/discharging of the third electrical energy source during start/stop operation, to ensure a sufficient voltage level over the additional vehicle electrical loads when the internal combustion engine and consequently the alternator are not running.Type: ApplicationFiled: June 19, 2012Publication date: December 27, 2012Applicant: VOLVO CAR CORPORATIONInventors: Oerjan Spjuth, Torbjoern Larsson, Daniel Midholm, Fredrik Ulmhage