Intelligent power supply system for new energy automobile

A new energy vehicle and power system technology, applied in the field of new energy vehicle intelligent power system, can solve the problems of short cycle life, slow charging and discharging, life discount, etc., to achieve the effect of continuous power supply and power protection

Inactive Publication Date: 2013-12-25
毛振刚
0 Cites 9 Cited by

AI-Extracted Technical Summary

Problems solved by technology

It is generally used for the drive of pure electric vehicles, but its cycle life is short, charging and discharging are slow, and the power required for starting and accelerating the motor requires a sharp discharge process. With the smooth operation of the motor, the batt...
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Method used

[0016] The supercapacitor is used as an auxiliary power supply and power battery to form a joint work, and the advantages of the high specific energy of the storage battery and the high specific power of the supercapacitor can be combined together. Let the supercapacitor quickly provide high-power current when the electric vehicle starts and climbs; the battery is quickly charged during normal driving; and the instantaneous high current generated by the generator is quickly stored when braking. This can reduce the limit requirements of ele...
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Abstract

The invention discloses an intelligent power supply system for a new energy automobile. The intelligent power supply system comprises a power battery, a super-capacitor, a DC/DC (Direct Current/Direct Current) power converter and a motor, wherein the power battery is connected with the DC/DC power converter; the DC/DC power converter is connected with the motor; the battery is connected with the DC/DC power converter; and the motor is a dual-winding motor. According to the technical scheme of the invention, two kinds of power supplies are combined, the advantages of the two kinds of power supplies are brought into full play, and the power supplies are applied to a power supply system of a pure electric automobile, so that complete and continuous power supply is provided while a power supply source is protected.

Application Domain

Vehicular energy storageElectric energy management +1

Technology Topic

Electrical batteryPower battery +7

Image

  • Intelligent power supply system for new energy automobile
  • Intelligent power supply system for new energy automobile
  • Intelligent power supply system for new energy automobile

Examples

  • Experimental program(1)

Example Embodiment

[0013] The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings:
[0014] An intelligent power supply system for new energy vehicles, such as figure 1 As shown, it includes a power battery, a super capacitor, a DC/DC power converter, and a motor. The power battery is connected to a DC/DC power converter, the DC/DC power converter is connected to the motor, and the battery is connected to DC/DC power. In the converter, the electric motor adopts a dual-winding electric motor; the electric motor is mechanically connected with an engine.
[0015] In conjunction with the drawings, the working principle of the present invention is explained:
[0016] Using the super capacitor as an auxiliary power source and the power battery to form a joint work together can combine the advantages of the high specific energy of the battery and the high specific power of the super capacitor. Let the super capacitor quickly provide high-power current when the electric vehicle is started and climbing; it is quickly charged by the battery during normal driving; and the instant large current generated by the generator is quickly stored when braking. This can reduce the restriction requirements of electric vehicles on the high-power discharge of the battery, so that the system can buy enough power and economic requirements at the same time, and protect the battery, greatly extend the battery cycle life, and provide the practicality of electric vehicles. Have a promising future. At the same time, due to the addition of super capacitors in the composite power supply, all energy or power is not provided by one part, which can not only reduce the number of power batteries used, but also optimize the output energy.
[0017] The functions of the driving device described above need to be realized by a reasonable control method. The working mode of the driving device of the present invention is analyzed in detail by taking a pure electric state as an example. The dual-winding motor is composed of two sets of three-phase windings, and its working principle is the same as that of an ordinary three-phase winding motor. First, the state of the motor needs to be determined: starting state, acceleration/climbing driving state, normal driving state, and braking/downhill driving state. The state of the motor determines how the system obtains power from the power source.
[0018] Such as figure 2 As shown, if the motor is in a normal driving state, that is, the output power remains unchanged, the power battery can be used to provide power to the motor to continuously supply power.
[0019] Such as image 3 As shown, if the electric motor is in the starting state or accelerating/climbing driving state, the power battery and the super capacitor are output together. Calculate the output capacity of the battery through the battery data sent by the battery management system. Combining the driver’s wishes (such as the depth of the accelerator pedal), control the common output of the super capacitor and the power battery, and combine the characteristics of the super capacitor and the power battery itself. The super capacitor has a small capacity but large instantaneous output power, and the power battery has a large capacity but not for a while Provides a larger output power, so when the output is common, the super capacitor provides a larger output power, and the power battery provides a smaller output power; if the super capacitor has sufficient power at this time, the super capacitor can also be output separately to provide motor start or The power required during the acceleration/climbing driving state, of course, can also be output by the super capacitor and the power battery, but considering that the power battery has a short cycle discharge life, when the super capacitor has sufficient power, try to use all the super capacitors. The capacitor performs driving work with a larger output power.
[0020] Such as Figure 4 As shown, if the motor is in a braking/downhill driving state, that is, the vehicle is decelerating, in order to reduce energy loss, a pure electric vehicle is generally designed with an energy brake recovery function, that is, because the motor driven by the brake reverses, the mechanical energy is converted into electrical energy and recovered to Power battery or super capacitor.
[0021] It should be emphasized that the embodiments described in the present invention are illustrative rather than restrictive. Therefore, the present invention is not limited to the embodiments described in the specific implementation manners. Anyone skilled in the art will use the technical solutions of the present invention. Other obtained implementation manners also belong to the protection scope of the present invention.

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Description & Claims & Application Information

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