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Vehicle dual-voltage energy recovery system and control method thereof

A technology of energy recovery and control method, which is applied in the direction of vehicle energy storage, electric braking system, power network operating system integration, etc. It can solve the problems of low energy utilization rate, reduction of recoverable transient potential energy, and inability to maintain electric load for a long time Work and other issues to achieve the effect of improving energy utilization

Pending Publication Date: 2020-09-08
FAW CAR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Only 12V voltage system is used for power supply, and its disadvantages are large energy loss and low energy utilization rate; when the vehicle is braking, the battery has a low ability to receive transient energy and cannot withstand frequent impacts of high current and high voltage, resulting in a reduction in recoverable transient potential energy
In addition, when the battery of the vehicle is low or fails, the vehicle user cannot keep the hazard warning lights, vehicle headlights and other emergency loads working for a long time.

Method used

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  • Vehicle dual-voltage energy recovery system and control method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The vehicle dual-voltage energy recovery control method of the present invention includes the following working conditions;

[0029] When the power control unit 1 collects the engine state signal of the engine controller 2, judges the state of the engine 3, and controls whether the DC-DC converter 9 works according to the state signals of the supercapacitor 4, the storage battery 6, and the generator 5.

[0030] When the engine state signal collected by the electric energy control unit 1 indicates that the vehicle is in the braking condition, the electric energy control unit controls the generator to generate electricity, and the engine drives the generator to work, and outputs 24V voltage to charge the supercapacitor; at the same time, the DC-DC converter will The 24V direct current stored in the supercapacitor is converted into 12V direct current, which is supplied to the storage battery and electric load.

[0031] When the engine state signal collected by the power c...

Embodiment 2

[0033] The vehicle dual-voltage energy recovery control method of the present invention also includes the following working conditions;

[0034] After the engine is started, when the engine state signal collected by the power control unit 1 indicates that the vehicle is in an acceleration state or an idle stop state, the generator is controlled not to generate electricity; at this time, the DC-DC converter converts the 24V DC stored in the supercapacitor into a 12V DC, Provided to the battery and electrical loads, it can avoid the torque consumption of the generator when the vehicle is accelerating and idling, increase the acceleration ability of the vehicle and save fuel.

Embodiment 3

[0036] The vehicle dual-voltage energy recovery control method of the present invention also includes the following working conditions;

[0037] When the engine state signal collected by the power control unit 1 represents that the vehicle is running normally, and the electric quantity of the supercapacitor is above the lower limit, the supercapacitor is preferentially used to supply power to the storage battery and the electric load. The direct current is converted into 12V direct current to supply power to the storage battery and electric loads.

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Abstract

The invention relates to a vehicle dual-voltage energy recovery system. An electric energy control unit of the system is electrically connected with an engine controller, a super capacitor, a generator, a storage battery and a direct current-direct current converter, the engine controller is electrically connected with a control end of an engine and a control end of a starter, output ends of the super capacitor and the generator are connected between a first node and the power ground, the storage battery, a power supply end of the starter and the electric load are connected between a second node and the power ground, a DC-DC converter is connected between the first node and the second node, a power output part of the starter is connected with a power input part of the engine through a mechanical structure, and a power output part of the engine is connected with a power input part of the generator through a mechanical structure. the generator can output the low-voltage direct current orhigh-voltage direct current under the control of the electric energy control unit. The system is advantaged in that energy loss can be reduced under the same power, and the energy utilization rate isimproved.

Description

Technical field: [0001] The invention belongs to the technical field of vehicle energy recovery, and relates to a vehicle dual-voltage energy recovery system and a control method thereof. Background technique: [0002] Existing passenger vehicles generally use a storage battery, 12V voltage system. Only 12V voltage system is used for power supply, and its disadvantages are large energy loss and low energy utilization rate; when the vehicle is braking, the battery has a low ability to receive transient energy and cannot withstand frequent impacts of high current and high voltage, resulting in a reduction in recoverable transient potential energy . In addition, when the battery of the vehicle is low or fails, the vehicle user cannot keep the hazard warning lights, vehicle headlights and other emergency loads working for a long time. Invention content: [0003] The technical problem to be solved by the present invention is to provide a vehicle dual-voltage energy recovery s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L7/20B60L50/40H02J7/34H02J9/08
CPCB60L7/20B60L50/40H02J7/345H02J9/08H02J2207/50Y04S20/20Y02B70/30Y02T10/70
Inventor 宋喜岗王洪超姜意驰张宝国
Owner FAW CAR CO LTD
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