Power supply system for vehicle
A power supply system and vehicle technology, applied in road vehicle drive control systems, electric braking systems, vehicle energy storage, etc., can solve the problems of reduced storage capacity of lead-acid batteries, improve fuel efficiency, avoid falling into insufficient charging, and reduce forced The effect of recharging opportunities
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no. 1 Embodiment approach
[0061] Hereinafter, the first embodiment of the present invention will be described with reference to the drawings.
[0062] figure 1 It is a figure which shows the structure of the power supply system S of this embodiment. The power supply system S is for a vehicle, and is installed in a vehicle not shown in the figure that has an engine as a powertrain. The power supply system S supplies electric power to various electric loads installed in the vehicle, or charges and uses electric power generated by a generator installed in the vehicle.
[0063] The power supply system S includes: a motor generator 1 as a generator; a battery module 3 including a first battery 2 as a first power storage device and a second battery 5 as a second power storage device; and a battery controller 7 to control Battery module 3.
[0064] The motor generator 1 is connected to a crank shaft of an engine (not shown) via a power transmission mechanism such as a belt or a pulley. The motor generator 1 uses ...
no. 2 Embodiment approach
[0115] Next, a second embodiment of the present invention will be described with reference to the drawings.
[0116] Figure 5 It is a flowchart showing a specific flow of switch control in the power supply system of this embodiment. The power supply system of the present embodiment is different from the power supply system of the first embodiment in that it further includes a voltage sensor that detects the voltage of the confluence part, and a part of the specific flow of switching control is different, and the other structures are the same. In addition, Figure 5 The processing of S31 and S36-S42 in the processing of S31-S41 shown are the same as those of Figure 4 The processing of S11 and S15 to S21 are the same, so detailed description is omitted.
[0117] If the determination of S31 is YES, that is, if simultaneous charging of the first battery and the second battery is currently being performed, the battery controller uses the voltage sensor to obtain the current bus voltag...
no. 3 Embodiment approach
[0124] Next, a third embodiment of the present invention will be described with reference to the drawings.
[0125] Image 6 It is a flowchart showing a specific flow of charge control of the first battery and the second battery in the power supply system of this embodiment. The power supply system of this embodiment is different from the power supply system of the first embodiment in that it further includes a voltage sensor that detects the voltage of the confluence part, and a part of the specific flow of charging control is different, and the other structures are the same.
[0126] In S51, the battery controller determines whether it is just after the start of regenerative power generation. If the determination of S51 is YES, the battery controller still keeps the first switch off and turns on the second switch to start priority charging of the second battery (see S52).
[0127] Here, in the power supply system of the first embodiment, immediately after the start of regenerative...
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