Power Supply System, Power Supply-Side Control Unit, And Electric Vehicle Incorporating Said System
First Claim
1. A power supply system, comprising:
- a power supply device comprising a plurality of power storage devices connected in parallel, a plurality of temperature detection units operable to detect respective temperatures of the power storage devices, and a plurality of switch elements respectively connected in series to the plurality of power storage devices;
a load electrically connected to the power supply device;
a power supply-side control unit operable to control the on-state and off-state of the switch elements;
a load-side control unit operable to control the electric power that is consumed or generated by the load,wherein the power supply-side control unit performs a temperature control for the plurality of power storage devices by controlling a time ratio of the on-state and off-state of each switch element based on the temperatures detected by the plurality of temperature detection units,wherein the power supply-side control unit transmits a notification signal indicative of the execution condition of the temperature control to the load-side control unit, andwherein the load-side control unit controls the electric power that is consumed or generated by the load based on the notification signal received from the power supply-side control unit.
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Accused Products
Abstract
A power supply system and a power supply-side control unit and an electric vehicle are described. The power supply device comprises a plurality of power storage devices connected in parallel. When the temperature of any power storage device is higher than the predetermined temperature TH, the power supply-side control unit 211 performs the duty ratio control for the power storage devices. Also, the power supply-side control unit 211 transmits a temperature control notification signal indicative of the current temperature control condition to a load-side control unit 221, which in turn controls the electric power that is consumed or generated by the load 220 on the basis of the temperature control notification signal. The life of the power supply device as a whole is therefore prevented from shortening by inhibiting the temperature rise and temperature variation in each power storage device. It is also possible to prevent the power supply system from halting due to occurrence of an error.
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Citations
6 Claims
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1. A power supply system, comprising:
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a power supply device comprising a plurality of power storage devices connected in parallel, a plurality of temperature detection units operable to detect respective temperatures of the power storage devices, and a plurality of switch elements respectively connected in series to the plurality of power storage devices; a load electrically connected to the power supply device; a power supply-side control unit operable to control the on-state and off-state of the switch elements; a load-side control unit operable to control the electric power that is consumed or generated by the load, wherein the power supply-side control unit performs a temperature control for the plurality of power storage devices by controlling a time ratio of the on-state and off-state of each switch element based on the temperatures detected by the plurality of temperature detection units, wherein the power supply-side control unit transmits a notification signal indicative of the execution condition of the temperature control to the load-side control unit, and wherein the load-side control unit controls the electric power that is consumed or generated by the load based on the notification signal received from the power supply-side control unit. - View Dependent Claims (2, 3, 4, 6)
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5. A power supply-side control unit operable to control the on-state and off-state of switch elements in a power supply system that comprises a power supply device comprising a plurality of power storage devices connected in parallel, a plurality of temperature detection units operable to detect temperatures of the power storage devices, and a plurality of switch elements respectively connected in series to the power storage devices;
- a load electrically connected to the power supply device; and
a load-side control unit operable to control the electric power that is consumed or generated by the load,wherein the power supply-side control unit performs a temperature control for the plurality of power storage devices by controlling a time ratio of the on-state and off-state of the switch elements based on temperatures detected by the temperature detection units, and wherein the power supply-side control unit transmits a notification signal indicative of the condition of the temperature control to the load-side control unit for controlling the electric power that is consumed or generated by the load.
- a load electrically connected to the power supply device; and
Specification