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DC voltage control system for hybrid power automobile and working method thereof

A hybrid vehicle, DC voltage technology, applied in hybrid vehicles, electric vehicles, motor vehicles, etc., can solve the problems of high output power and low fuel efficiency, and achieve reduced winding current, improved efficiency, and reduced size. Effect

Active Publication Date: 2008-01-02
BYD CO LTD
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, the idea of ​​designing a hybrid vehicle is to increase the engine power, or increase the voltage of the battery pack to increase the output power and torque of the vehicle, but no matter which method is used, the fuel efficiency is very low. If you want to achieve both environmental protection and output It's hard to be powerful

Method used

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  • DC voltage control system for hybrid power automobile and working method thereof

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Embodiment Construction

[0024] The DC voltage control system in the embodiment includes a generator, a motor, a storage battery, a control unit, an inductor L, a diode D1, a capacitor C1, a transistor Q2, a diode D2, a capacitor C2, a transistor Q1, an inductor L, a diode D1, a capacitor C1, and a transistor Q2 forms a step-up power supply circuit, and inductor L, diode D2, capacitor C2 and transistor Q1 form a step-down charging circuit. The connection relationship is as follows: capacitor C1 is connected in parallel to both ends of the motor and generator, the negative end of the motor and generator is connected to the emitter of transistor Q2, the inductor L is connected between the positive pole of the battery and the collector of transistor Q2, and the positive pole of diode D1 Connected to the collector of transistor Q2, the negative pole is connected to the positive pole of the motor and generator; the capacitor C2 is connected in parallel to both ends of the battery, the positive end of the mo...

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Abstract

The invention discloses a DC voltage control system of hybrid electric vehicle, comprising generator, electromotor, storage battery and control unit. The control unit controls the generator and electromotor and is connected with them. Generator and electromotor are connected with the storage battery in current. A voltage-increasing power supply circuit for increasing outputting voltage of storage battery to electromotor and a voltage-decreasing charging circuit for decreasing outputting voltage of generator or obtaining outputting voltage from vehicle kinetic energy to the storage battery when electromotor is used as regenerative braking are set between the electromotor and the storage battery. The control unit is used to control on-off and switch of the voltage-increasing power supply circuit and the voltage-decreasing charging circuit. Because voltage-increasing circuit is adopted storage battery can adopt low-voltage battery group so as to decrease battery system cost and cubage and achieve demands of low cost and mass production. Because power supply increasing voltage of electromotor is improved copper quantity for motor winding can be decreased greatly; motor size is decreased; consumption is decreased and efficiency is improved under the status of the same power.

Description

technical field [0001] The invention relates to the technical field of hybrid electric vehicles, in particular to a DC voltage control system and a working method of the hybrid electric vehicle. Background technique [0002] With the gradual reduction of oil resources, environmental pollution is becoming more and more serious. In the future, cars must reduce fuel consumption as much as possible, or even not use oil at all, so as to adapt to the gradually increasing pressure on environmental protection. To solve this problem, but this technology is still immature, the cost is still high, affected by battery price, charging time and mileage after each charge, etc., there is still a long way to go before large-scale commercial application. So for now, cars that use petroleum cannot be replaced. The only thing that can be done now is to reduce fuel consumption as much as possible. Hybrid vehicles are a good way to reduce fuel consumption. Generally, the idea of ​​designing a hy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L15/00B60W10/08B60W10/26B60W20/00B60W20/14B60W20/16
Inventor 吴志毅
Owner BYD CO LTD
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