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Power system and control method of a range-extended pure electric vehicle

A pure electric vehicle and power system technology, which is applied in the power system and control field of the extended-range pure electric vehicle, can solve the problems of limitation and difficulty in improving the cruising range, and achieves the advantages of preventing the memory effect, reducing the overall weight and saving the production cost. Effect

Active Publication Date: 2018-09-14
JIANGSU HUAZI AUTO INDUSTRY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, electric vehicles are limited by battery capacity, and are basically limited to short distances, and it is difficult to improve the mileage. Therefore, it is urgent to develop an electric vehicle that can make up for the short mileage caused by the battery capacity limitation.

Method used

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  • Power system and control method of a range-extended pure electric vehicle
  • Power system and control method of a range-extended pure electric vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Such as figure 1 The power system of the extended-range pure electric vehicle shown, the system includes: a power battery pack (1), an engine (4), a fuel tank (2) providing fuel for the engine (4), converting the kinetic energy of the engine A generator (5) for electric energy, a power distribution controller (8), a drive motor (6) for driving the vehicle, a vehicle controller (8) and an engine controller (3); inside the fuel tank (2) The fuel is petrol. The power battery pack (1) is provided with two external charging ports, which are respectively used to connect a 380V fast charging station and a 220V common power supply. The single battery used in the power battery pack is a lithium titanate battery.

[0037] The power battery pack (1), the generator (5) and the drive motor (6) are all electrically connected to a power distribution controller (8), and the power battery pack (1) and the generator (5) The provided electric power is supplied to the driving motor (6) ...

Embodiment 2

[0046] Embodiment 2 has also increased solar panel (12) on the basis of embodiment 1, is arranged on the ceiling of pure electric vehicle;

[0047] Steps 3), 4) in the activation process are:

[0048] (3) With the battery pack discharged to the over-discharge cut-off voltage, carry out positive and negative alternating pulse current cycles 10 times near the over-discharge cut-off voltage, the pulse current is 0.2C, the pulse action time is 60s, and the interval is 20s;

[0049] (4) Charge with a constant current to the charging cut-off voltage, perform positive and negative alternating pulse current cycles 10 times near the charging cut-off voltage, the pulse current is 0.2C, the pulse action time is 60s, and the interval is 20s.

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PUM

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Abstract

A power system of an extended-range pure electric vehicle, comprising: a power battery pack (1), an engine (4), a fuel tank (2) for supplying fuel to the engine (4), a generator (5) for converting kinetic energy of the engine into electric energy, a power distribution controller (8) and a drive motor (6) for driving the vehicle to run. The power battery pack (1), the generator (5) and the drive motor (6) are all electrically connected to the power distribution controller (8). Power supplied by the power battery pack (1) and the generator (5) is supplied to the drive motor (6) by means of the power distribution controller (8). When the power of the power battery pack (1) is insufficient, the engine (4) starts so as to drive the generator (5) to generate electricity, and supply the electric power generated by the motor (5) to the drive motor (6) and charge the power battery pack (1). The described system may charge a battery pack, distribute energy intelligently and carry out maintenance of the battery pack according to the driving situation of a vehicle, and may prolong the mileage of an electric vehicle and the service life of the battery pack. Also provided by the present invention is a control method for the power system of the extended-range pure electric vehicle.

Description

technical field [0001] The invention belongs to the technical field of electric vehicles, and in particular relates to a power system and a control method of an extended-range pure electric vehicle. Background technique [0002] In the future, when national and local subsidies for new energy are reduced, pure electric vehicles have the following obvious advantages. 1. 80% of domestic passenger cars are used for commuting to and from get off work, taking children to school, and outings in the city. This process can all be driven by pure electricity to achieve zero emissions. 2. In the case of perfect charging facilities in the future, 80% of the trip can use power batteries and external power supplies. 3. For urban logistics vehicles, the logistics distance generally does not exceed 100km. In the future after the charging facilities are improved, almost 80% of the driving process will be charged with an external power supply. 4. For light buses and commuter vehicles of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L11/12B60L11/18B60L8/00B60L50/15
CPCB60L8/003B60L50/61B60L58/10B60L58/12Y02T10/62Y02T10/70Y02T10/7072
Inventor 李璟瑜孟明华
Owner JIANGSU HUAZI AUTO INDUSTRY CO LTD
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