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A method for discharge control of an extended-range electric vehicle

An electric vehicle and range-extending technology, applied in electric vehicles, battery/fuel cell control devices, motor vehicles, etc., can solve the problems of lack of protection mechanism, adjustment and control, and inflexible control methods

Active Publication Date: 2016-08-24
HUBEI JINQUAN NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the setting value of the threshold value is often fixed and cannot be adjusted and controlled according to its own needs, so its control method is not flexible; in addition, the discharge power is controlled by the throttle signal value or throttle parameters, and when the driving speed itself has passed Fast, but the accelerator pedal is still in the deep accelerator output, the vehicle is very dangerous, there is no effective protection mechanism to protect the safety of the vehicle

Method used

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  • A method for discharge control of an extended-range electric vehicle
  • A method for discharge control of an extended-range electric vehicle
  • A method for discharge control of an extended-range electric vehicle

Examples

Experimental program
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Effect test

Embodiment 1

[0064] Please refer to figure 1 , which is a schematic diagram of the system structure of the discharge control of the extended-range electric vehicle of the first embodiment. The electric vehicle includes the following components: a vehicle controller 10 , a battery system 20 , an APU (Auxiliary Power Unit, auxiliary power unit) power generation system 30 , a main drive system 40 and a human-computer interaction unit 70 .

[0065]Among them, the main driving system 40 includes: a driving motor, a driving motor controller, and its main function is to drive the vehicle to run; the battery system 20 includes: a battery module, a battery management system and an external charging interface, which are the source of power for the electric vehicle; APU generates electricity The system 30 includes: an engine, a generator and a generator controller, and its main function is to charge the power battery during the operation of the electric vehicle.

[0066] Specifically, the vehicle co...

Embodiment 2

[0075] Based on the discharge control system of the extended-range electric vehicle in the first embodiment, this embodiment provides a discharge control method for the extended-range electric vehicle, please refer to figure 2 , which is a flow chart of the first discharge control method of the extended-range electric vehicle of the second embodiment, the method includes:

[0076] S110, the vehicle controller 10 is powered on and started.

[0077] After the electric vehicle is powered on, the vehicle controller 10, battery system 20, APU power generation system 30, human-computer interaction unit 70, driving speed monitor 60 and other equipment are powered on one after another; the vehicle controller 10 loads some preset Parameters, such as preset speed threshold, reference power and other parameters.

[0078] S121. Obtain the SOH value of the battery system 20.

[0079] The combination of SOC (state of charge, battery remaining capacity) and SOH (state of health, battery c...

Embodiment 3

[0107] This embodiment provides a discharge control method for an extended-range electric vehicle, please refer to figure 2 , which is a flow chart of the second discharge control method of the extended-range electric vehicle of the third embodiment, the method includes:

[0108] S110, the vehicle controller 10 is powered on and started.

[0109] After the electric vehicle is powered on, the vehicle controller 10, battery system 20, APU power generation system 30, human-computer interaction unit 70, driving speed monitor 60 and other equipment are powered on one after another; the vehicle controller 10 loads some preset Parameters, such as preset speed threshold, reference power, SOC limit value, temperature threshold, single voltage limit value, total voltage limit value and other parameters.

[0110] S121. Obtain the SOH value of the battery system 20.

[0111] The SOC value and the SOH value of the battery system 20 refer to the SOC value and the SOH value of the battery...

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Abstract

The invention discloses a discharge control method of an extended range electric vehicle. The discharge control method comprises the following steps: electrifying to start a vehicle control unit; acquiring the input parameters of an electronic accelerator and the running speed of the electric vehicle on real time; calculating the first required output power of the electric vehicle according to the input parameters of the electronic accelerator; comparing the running speed with a preset speed threshold; determining the second output power according to the comparison result; then determining the actual output power of a battery system according to the first required output power and the second required output power. According to the discharge control method of the extended range electric vehicle, the running speed of the electric vehicle is controlled by limiting the discharging power of a battery system while the electric vehicle runs at a fast speed, the actual output power is lowered down while the electric vehicle runs at a fast speed and a pedal of the accelerator is maintained in a deep accelerator output status, and thus the running speed can be gradually reduced, and the safety of the vehicle can be ensured.

Description

technical field [0001] The invention relates to the field of control of the operation of the electric vehicle, in particular to a discharge control method for an extended-range electric vehicle. Background technique [0002] The battery discharge power of traditional electric vehicles is judged and controlled by calculating the discharge power of the power battery according to the battery SOC value and the throttle signal value. When the SOC value or voltage of the battery is lower than a certain threshold, the discharge is stopped; when the SOC value or When the voltage is higher than a certain threshold, it can discharge normally. Among them, the setting value of the threshold value is often fixed and cannot be adjusted and controlled according to its own needs, so its control method is not flexible; in addition, the discharge power is controlled by the throttle signal value or throttle parameters, and when the driving speed itself has passed Fast, but the accelerator ped...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L15/00B60L3/08
CPCB60K6/46B60L3/08B60L15/20B60L50/61B60L58/13B60L58/14B60L58/15B60L2240/12B60L2240/545B60L2240/547B60L2250/28B60W10/06B60W10/08B60W10/26B60W20/13B60W2510/244B60W2520/10B60W2540/10B60W2710/248B60W2720/10Y02T10/62Y02T10/64Y02T10/70Y02T10/72
Inventor 戴贤青李革臣李芬朱锦其张海丽
Owner HUBEI JINQUAN NEW MATERIALS CO LTD