Battery electric system with alternating current self-heating mode
US-2024429481-A1 · Dec 26, 2024 · US
Electric power supply system for vehicle
US2017264104A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2017264104-A1 |
| Application number | US-201715453389-A |
| Country | US |
| Kind code | A1 |
| Filing date | Mar 8, 2017 |
| Priority date | Mar 10, 2016 |
| Publication date | Sep 14, 2017 |
| Grant date | — |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
An electric power supply system for a vehicle includes a first battery, a second battery connected in parallel with the first battery, a voltage sensor configured to detect a voltage value of the second battery, a current sensor configured to detect a current value of the second battery, an electronic control unit configured to make a voltage of the alternator fluctuate according to a predetermined voltage waveform, and calculate internal resistance of the second battery using the voltage value and the current value of the second battery respectively detected by the voltage sensor and the current sensor while the electronic control unit is making the voltage of the alternator fluctuate according to the predetermined voltage waveform.
First claim
Opening claim text (preview).
What is claimed is: 1 . An electric power supply system comprising: a first battery connected to an alternator or a direct current to direct current converter and configured to be charged with electric power supplied from the alternator or the direct current to direct current converter and to supply electric power to an electric load mounted in a vehicle; a second battery connected to the alternator or the direct current to direct current converter, configured to be charged with electric power supplied from the alternator or the direct current to direct current converter, and connected in parallel with the first battery; a voltage sensor configured to detect a voltage value of the second battery; a current sensor configured to detect a current value of the second battery; and an electronic control unit including a central processing unit and configured to make a voltage of the alternator or the direct current to direct current converter fluctuate according to a predetermined voltage waveform; and calculate internal resistance of the second battery using the voltage value and the current value of the second battery respectively detected by the voltage sensor and the current sensor while the electronic control unit is making the voltage of the alternator or the direct current to direct current converter fluctuate according to the predetermined voltage waveform. 2 . The electric power supply system according to claim 1 , wherein the electronic control unit is configured to: determine whether or not the electric power supply system is in a situation capable of making the voltage of the alternator or the direct current to direct current converter fluctuate according to the predetermined voltage waveform; and make the voltage of the alternator or the direct current to direct current converter fluctuate according to the predetermined voltage waveform when the electronic control unit determines that the electric power supply system is in a situation capable of making the voltage of the alternator or the direct current to direct current converter fluctuate according to the predetermined voltage waveform. 3 . The electric power supply system according to claim 1 , wherein the predetermined voltage waveform is generated based on an upper limit voltage value for preventing the first battery from being overcharged and a lower limit voltage value for suppressing a decrease in charging rate of the first battery. 4 . The electric power supply system according to claim 3 , wherein the predetermined voltage waveform changes from the upper limit voltage value to the lower limit voltage value. 5 . The electric power supply system according to claim 1 , wherein the electronic control unit is configured to: make the voltage of the alternator or the direct current to direct current converter repeatedly fluctuate in the same form as the predetermined voltage waveform, and calculate the internal resistance of the second battery each time the electronic control unit makes the voltage of the alternator or the direct current to direct current converter repeatedly fluctuate in the same form as the predetermined voltage waveform.
Assignees
Inventors
Classifications
Battery or charger load switching, e.g. concurrent charging and load supply (H02J7/50 takes precedence) · CPC title
between battery management systems and power sources · CPC title
- H02J7/977Primary
of the battery · CPC title
related to batteries · CPC title
Voltage · CPC title
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US2017264104A1 cover?
- An electric power supply system for a vehicle includes a first battery, a second battery connected in parallel with the first battery, a voltage sensor configured to detect a voltage value of the second battery, a current sensor configured to detect a current value of the second battery, an electronic control unit configured to make a voltage of the alternator fluctuate according to a predeterm…
- Who is the assignee on this patent?
- Toyota Motor Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification H02J7/977. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Thu Sep 14 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).