CN102275520A - Energy control method of power lithium battery pack of electric automobile - Google Patents

Abstract

The invention relates to an energy control method of a power lithium battery pack of an electric automobile. The method sequentially comprises the following steps that: an automobile body controller ECU (electronic control unit) clears the travel distance during charging; after the charging, the automobile body controller ECU calculates the electric quantity of the battery pack, and a driver sets the travel distance before driving the automobile; the automobile body controller ECU judges whether the electric quantity of the battery pack can support the set travel distance or not; if the judgment result is negative, the automobile body controller ECU starts a generating set to generate electricity; otherwise, the generating set does not act; and after the set travel distance is achieved, the cycle is finished, and the next cycle is started. According to the invention, the electric energy of the power lithium battery pack in the electric automobile can be reasonably used by reasonably allocating and controlling the energy of the power lithium battery pack, thus the travel distance of the electric automobile is prolonged, the number of the expensive power lithium batteries can be reduced based on the electric automobile, the cost of the automobile is remarkably lowered, and the popularization and application of the automobile are facilitated.

Description

A kind of energy control method of electric powered motor lithium cell group

Technical field

The present invention relates to the electronlmobil field, especially a kind of energy control method of electric powered motor lithium cell group.

 

Background technology

Along with the greenhouse gas emission that increases day by day and the variation of weather, the application of electronlmobil extraordinarily is subjected to the attention and the approval of the whole society, yet the restriction of applying or be subjected to himself dynamic lithium battery group energy of electronlmobil can't be satisfied the city traffic continual mileage demand of every day.Under the condition of the charge characteristic of present lithium cell, can't carry out fast charge again, each charging all needs 5 to 8 hours, is subjected to the restriction of charging duration, therefore makes the popularization of electronlmobil encounter difficulties.

Summary of the invention

The object of the present invention is to provide a kind of energy that can rationally utilize the dynamic lithium battery group, make can the travel energy control method of electric powered motor lithium cell group of longer mileage of limited electric weight.

For achieving the above object, the present invention has adopted following technical scheme: a kind of energy control method of electric powered motor lithium cell group, and this method comprises the step of following order:

(1) car body controller ECU when charging with the travelled distance zero clearing, after charging is finished, car body controller ECU counting cell group electric weight, simultaneously, the driver sets travelled distance before steering vehicle;

(2) car body controller ECU judges whether battery electric quantity can support the travelled distance of setting, if judged result is not, and then starter-generator group generating, otherwise generator set is failure to actuate;

(3) after reaching the travelled distance of setting, finish, begin next circulation again.

As shown from the above technical solution, the electricity ratio that the electric weight of driver demand and power accumulator is stored of the car body controller ECU among the present invention, if the energy that energy demand can provide greater than power accumulator then replenishes electric weight by the generator set generating.The present invention uses by the energy that reasonably distributes control dynamic lithium battery group, thereby make the electric energy of electronlmobil internally-powered lithium cell group can access reasonable use, prolonged the travelled distance of electronlmobil, can on the basis of electronlmobil, reduce the quantity of expensive dynamic lithium battery again, greatly reduce the cost of vehicle, be convenient to the popularization and the application of vehicle.

 

Description of drawings

Fig. 1 is a control flow chart of the present invention.

 

The specific embodiment

A kind of energy control method of electric powered motor lithium cell group, this method comprises the step of following order: at first, car body controller ECU when charging with the travelled distance zero clearing, after charging is finished, car body controller ECU counting cell group electric weight, simultaneously, the driver sets travelled distance before steering vehicle; Secondly, car body controller ECU judges whether battery electric quantity can support the travelled distance of setting, if judged result is not, and then starter-generator group generating, otherwise generator set is failure to actuate; At last, after reaching the travelled distance of setting, finish, begin next circulation again.Next circulation of indication herein is meant when charging next time, the same action of repeating step one, two, three again, as shown in Figure 1.

After charging was finished, car body controller ECU sent a control signal to battery management system, detected battery electric quantity by battery management system, and battery electric quantity is sent to car body controller ECU.Car body controller ECU divided by the travelled distance that the driver sets, obtains every kilometer electric energy that battery pack can provide with the detected battery electric quantity of battery management system; This every kilometer electric energy is compared with every kilometer power consumption of vehicle, if every kilometer power consumption is during greater than every kilometer electric energy, the generating of starter-generator group, otherwise be failure to actuate.The difference that described generator set electricity amount is every kilometer power consumption and every kilometer electric energy multiply by the travelled distance of setting.Car body controller ECU calculates the travelled distance of vehicle by odometer sensor.

The data of every kilometer power consumption obtain that two kinds of methods are arranged: carry out the test operation of vehicle, according to the concrete route of vehicle, every kilometer power consumption that operating mode obtains vehicle.Carry out real-time operation and calculate, every kilometer power consumption of this day obtains according to every kilometer average current drain of the last week.

The dynamic lithium battery group last once utilize grid charging after, car body controller ECU carries out zero clearing to a travelled distance of vehicle, utilize odometer sensor to begin to calculate travelled distance, travelled distance according to driver's setting, by the energy that the regulator generator group provides, the energy of distributed power battery pack and generator set energy are to reach best travelled distance, if the energy demand of drive system is then provided by generator set greater than the energy that power accumulator can provide.The present invention uses by the energy that reasonably distributes control dynamic lithium battery group, thereby makes the electric energy of electronlmobil internally-powered lithium cell group can access reasonable use, has prolonged the travelled distance of electronlmobil.

Claims (7)

1. the energy control method of an electric powered motor lithium cell group, this method comprises the step of following order:

(1) car body controller ECU when charging with the travelled distance zero clearing, after charging is finished, car body controller ECU counting cell group electric weight, simultaneously, the driver needs to set travelled distance before steering vehicle;

(2) car body controller ECU judges whether battery electric quantity can support the travelled distance of setting, if judged result is not, and then starter-generator group generating, otherwise generator set is failure to actuate;

(3) after reaching the travelled distance of setting, finish, begin next circulation again.

2. the energy control method of electric powered motor lithium cell group according to claim 1, it is characterized in that: after charging is finished, car body controller ECU sends a control signal to battery management system, detect battery electric quantity by battery management system, and battery electric quantity is sent to car body controller ECU.

3. the energy control method of electric powered motor lithium cell group according to claim 1 is characterized in that: car body controller ECU divided by the travelled distance that the driver sets, obtains every kilometer electric energy that battery pack can provide with detected battery electric quantity; This every kilometer electric energy is compared with every kilometer power consumption of vehicle, if every kilometer power consumption is during greater than every kilometer electric energy, the generating of starter-generator group, otherwise be failure to actuate.

4. the energy control method of electric powered motor lithium cell group according to claim 1 is characterized in that: car body controller ECU calculates the travelled distance of vehicle by odometer sensor.

5. the energy control method of electric powered motor lithium cell group according to claim 3 is characterized in that: the difference that described generator set electricity amount is every kilometer power consumption and every kilometer electric energy multiply by the travelled distance that the driver sets.

6. the energy control method of electric powered motor lithium cell group according to claim 3 is characterized in that: carry out the test operation of vehicle, according to the concrete route of vehicle, every kilometer power consumption that operating mode obtains vehicle.

7. the energy control method of electric powered motor lithium cell group according to claim 3 is characterized in that: carry out real-time operation and calculate, every kilometer power consumption of this day obtains according to every kilometer average current drain of the last week.

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