CN103475041A - Battery charging control system and method of electric automobile - Google Patents
Battery charging control system and method of electric automobile Download PDFInfo
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- CN103475041A CN103475041A CN2013103588190A CN201310358819A CN103475041A CN 103475041 A CN103475041 A CN 103475041A CN 2013103588190 A CN2013103588190 A CN 2013103588190A CN 201310358819 A CN201310358819 A CN 201310358819A CN 103475041 A CN103475041 A CN 103475041A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention provides a battery charging control system and method of an electric automobile. The battery charging control system of the electric automobile comprises a power battery for providing a driving power supply to the electric automobile, a low-voltage storage battery, a heating device for heating the power battery, a cooling device for cooling the power battery, a vehicle-mounted charger, a DC/DC converter and a battery management system. The vehicle-mounted charger is used for converting the electric energy of an external power supply for outputting to the power battery, the heating device and the cooling device. The DC/DC converter is used for converting the electric energy of the power battery for outputting to the low-voltage storage battery. The low-voltage storage battery supplies a low-voltage power supply to the battery management system and the battery management system is used for controlling the working of the heating device, the cooling device, the vehicle-mounted charger and the DC/DC converter according to the temperature parameters and the electric quantity parameters of the power battery and a low-voltage charging signal about whether the low-voltage storage battery needs to be charged.
Description
Technical field
The present invention relates to the electric automobile field, relate in particular to a kind of battery charging controller and method of electric automobile.
Background technology
The battery of electric automobile comprises electrokinetic cell and low pressure accumulate pond, and wherein electrokinetic cell is for providing high voltage source for running car, and it generally consists of battery pack by a plurality of battery cells; And low pressure accumulate pond is used to the vehicle-mounted equipment such as battery management system that low-tension supply is provided.Electrokinetic cell (as lead acid accumulator, cadmium-nickel storage cell, lithium storage battery etc.) is after work a period of time, and electric weight can be reduced to and can not provide enough power for automobile, at this moment needs electrokinetic cell is charged to supplement the energy.In charging process, electrokinetic cell is subject to the impact of ambient temperature to there will be the phenomenon that can't charge, therefore, when charging, need to take into full account the impact of ambient temperature on power battery charging.
Battery management system is for the charging of management and control electrokinetic cell, battery management system is in the process of controlling power battery charging, provide low-tension supply by low pressure accumulate pond for battery management system, when the electric weight in low pressure accumulate pond hangs down can not maintain the battery management system normal operation time, the electrokinetic cell interruption of just can't charging or charge, therefore, in the process of charged at electrokinetic cell (fill soon, trickle charge), low pressure accumulate pond likely there will be electric deficiency phenomenon.
Summary of the invention
The invention provides a kind of battery charging controller of electric automobile, consider the impact of the electric weight in the ambient temperature of electrokinetic cell and low pressure accumulate pond on power battery charging simultaneously, the charging environment that makes electrokinetic cell is safety and stability more.
In addition, the present invention also provides the method for the battery charging controller of the above-mentioned electric automobile of application.
For reaching above-mentioned advantage, the invention provides a kind of battery charging controller of electric automobile, comprising:
Electrokinetic cell, be used to electric automobile that driving power is provided;
Low pressure accumulate pond;
Heater, for heating described electrokinetic cell;
Cooling device, for cooling described electrokinetic cell;
Vehicular charger, for exporting to described electrokinetic cell, described heater and described cooling device after the conversion of the electric energy by external power source;
The DC/DC transducer, for exporting to described low pressure accumulate pond after the conversion of the electric energy by described electrokinetic cell; And
Battery management system, provide low-tension supply by described low pressure accumulate pond for described battery management system, described battery management system, for whether need the low pressure charging signals of charging according to the temperature parameter of described electrokinetic cell and electrical parameter and described low pressure accumulate pond, is controlled the following task of carrying out:
When the temperature of described electrokinetic cell, during lower than the first preset value, described battery management system is controlled described heater described electrokinetic cell is heated;
When the temperature of described electrokinetic cell during higher than the second preset value, described battery management system is controlled described cooling device and described electrokinetic cell is carried out cooling, and wherein said the second preset value is greater than described the first preset value;
When the temperature of described electrokinetic cell between described the first preset value and described the second preset value, the electric weight of described electrokinetic cell is when being greater than a default charge value and described low pressure accumulate pond and sending the low pressure charging signals that needs charging, described battery management system is controlled described electrokinetic cell and by described DC/DC transducer, is charged in described low pressure accumulate pond;
When the temperature of described electrokinetic cell, between described the first preset value and described the second preset value and the electric weight of described electrokinetic cell while being less than described default charge value, described battery management system is controlled described Vehicular charger described electrokinetic cell is charged; And
When the temperature of described electrokinetic cell between described the first preset value and described the second preset value, the electric weight of described electrokinetic cell is when being greater than described default charge value and described low pressure accumulate pond and not sending the low pressure charging signals that needs charging, described battery management system is controlled described Vehicular charger described electrokinetic cell is charged.
In one embodiment of the invention, described battery management system is also further controlled the following task of carrying out:
When the temperature of described electrokinetic cell between described the first preset value and the 3rd preset value, the electric weight of described electrokinetic cell is when being greater than described default charge value and described low pressure accumulate pond and sending the low pressure charging signals that needs charging, described battery management system is also controlled described heater described electrokinetic cell is heated, and wherein said the 3rd preset value is greater than described the first preset value but lower than described the second preset value;
When the temperature of described electrokinetic cell between described the first preset value and described the 3rd preset value, the electric weight of described electrokinetic cell is while being less than described default charge value, described battery management system is also controlled described heater described electrokinetic cell is heated;
When the temperature of described electrokinetic cell between described the first preset value and described the 3rd preset value, the electric weight of described electrokinetic cell is when being greater than described default charge value and described low pressure accumulate pond and not sending the low pressure charging signals that needs charging, described battery management system is also controlled described heater described electrokinetic cell is heated.
In one embodiment of the invention, form the charging circuit of described electrokinetic cell between described electrokinetic cell and described Vehicular charger; In the charging circuit of described electrokinetic cell, be provided with charging contactor between the positive pole of described Vehicular charger and described electrokinetic cell, be provided with total negative contactor between the negative pole of described Vehicular charger and described electrokinetic cell; Described battery management system is closed to connect the charging circuit of described electrokinetic cell by controlling described charging contactor and described total negative contactor while.
In one embodiment of the invention, described DC/DC transducer is located between described electrokinetic cell and described low pressure accumulate pond, be provided with total positive contactor between the positive pole of described DC/DC transducer and described electrokinetic cell, described total negative contactor is between the negative pole of described DC/DC transducer and described electrokinetic cell; Described battery management system is by controlling described always positive contactor and described total negative contactor while closure so that described electrokinetic cell is charged to described low pressure accumulate pond by described DC/DC transducer.
In one embodiment of the invention, described heater and described Vehicular charger are connected to form the heater circuit of described electrokinetic cell, described charging contactor is positioned at the heater circuit of described electrokinetic cell simultaneously, and the heater circuit of described electrokinetic cell also is provided with the heating contactor; Described battery management system is simultaneously closed to connect the heater circuit of described electrokinetic cell by controlling described charging contactor and described heating contactor.
In one embodiment of the invention, described cooling device and described Vehicular charger are connected to form the cooling circuit of described electrokinetic cell, described charging contactor is positioned at the cooling circuit of described electrokinetic cell simultaneously, and the cooling circuit of described electrokinetic cell also is provided with cooling contactor; Described battery management system is simultaneously closed to connect the cooling circuit of described electrokinetic cell by controlling described charging contactor and described cooling contactor.
In one embodiment of the invention, described the first preset value is-30 ℃, and described the second preset value is 50 ℃, and described the 3rd preset value is 0 ℃.
In one embodiment of the invention, 15% of the specified electric quantity that described default charge value is described electrokinetic cell.
The present invention also provides a kind of battery charging control method of electric automobile, and step comprises:
(1) whether the temperature of collection electrokinetic cell and electric weight and low pressure accumulate pond need the low pressure charging signals of charging;
(2), when the temperature of electrokinetic cell is lower than the first preset value, controls heater electrokinetic cell is heated;
(3) when the temperature of electrokinetic cell is higher than the second preset value, the control cooling device carries out cooling to electrokinetic cell, and wherein the second preset value is greater than the first preset value;
(4) temperature of electrokinetic cell between the first preset value and the second preset value, the electric weight of electrokinetic cell is when being greater than a default charge value and low pressure accumulate pond and sending the low pressure charging signals that needs charging, control electrokinetic cell and by the DC/DC transducer, charged in low pressure accumulate pond;
(5) temperature of electrokinetic cell between the first preset value and the second preset value and the electric weight of electrokinetic cell while being less than default charge value, is controlled Vehicular charger electrokinetic cell is charged;
(6) temperature of electrokinetic cell between the first preset value and the second preset value, the electric weight of electrokinetic cell is when being greater than default charge value and low pressure accumulate pond and not sending the low pressure charging signals that needs charging, control Vehicular charger electrokinetic cell charged.
In one embodiment of the invention, when the temperature of described electrokinetic cell between described the first preset value and the 3rd preset value, the electric weight of described electrokinetic cell is when being greater than described default charge value and described low pressure accumulate pond and sending the low pressure charging signals that needs charging, also comprise that controlling described heater is heated described electrokinetic cell, wherein said the 3rd preset value is greater than described the first preset value but lower than described the second preset value;
When the temperature of described electrokinetic cell between described the first preset value and described the 3rd preset value, the electric weight of described electrokinetic cell is while being less than described default charge value, also comprises that controlling described heater is heated described electrokinetic cell;
When the temperature of described electrokinetic cell between described the first preset value and described the 3rd preset value, the electric weight of described electrokinetic cell is when being greater than described default charge value and described low pressure accumulate pond and not sending the low pressure charging signals that needs charging, also comprises that controlling described heater is heated described electrokinetic cell.
The battery charging controller of electric automobile of the present invention and method, consider the ambient temperature of electrokinetic cell and the electric weight factor in low pressure accumulate pond, when ambient temperature is low, first by heater, electrokinetic cell is heated, and then charged, and by electrokinetic cell, by the DC/DC transducer, charged in low pressure accumulate pond while simultaneously in low pressure accumulate pond, power shortage occurring, the charging environment that can make electrokinetic cell is safety and stability more.
For above and other objects of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly, and coordinate appended graphicly, be described in detail below.
The accompanying drawing explanation
Fig. 1 is the structural representation of battery charging controller of the electric automobile of better embodiment of the present invention.
The flow chart of the battery charging control method of the electric automobile that Fig. 2 is better embodiment of the present invention.
Embodiment
The structural representation of the battery charging controller of the electric automobile that Fig. 1 is better embodiment of the present invention.Please refer to Fig. 1, the battery charging controller of electric automobile comprises electrokinetic cell 10, low pressure accumulate pond 20, Vehicular charger 30, DC/DC transducer 40, heater 50, cooling device 60, reaches battery management system 70.
Vehicular charger 30 can be DC charging motor or AC charging machine, and it will export to electrokinetic cell 10, heater 50 and cooling device 60 after the conversion of the electric energy of external power source for being connected with external power source.
Form the charging circuit of electrokinetic cell between electrokinetic cell 10 and Vehicular charger 30, and be provided with charging contactor K1 between the positive pole of Vehicular charger 30 and electrokinetic cell 10, be provided with total negative contactor K2 between the negative pole of Vehicular charger 30 and electrokinetic cell 10.When charging contactor K1 and total negative contactor K2 while closure, the charging circuit of electrokinetic cell is connected, 10 chargings of 30 pairs of electrokinetic cells of Vehicular charger.
Low pressure accumulate pond 20 can be lead acid accumulator, and operating voltage is in the 12V left and right.Low pressure accumulate pond 20 other electric power supply for battery management system 70 and charging process are worked.
DC/DC transducer 40 is located between electrokinetic cell 10 and low pressure accumulate pond 20, is a kind ofly high-voltage DC power supply to be converted to the transducer of low-voltage dc power supply, for after the conversion of the electric energy by electrokinetic cell 10, being filled with low pressure accumulate pond 20.Be provided with total positive contactor K3 between the positive pole of DC/DC transducer 40 and electrokinetic cell 10, always negative contactor K2 is between the negative pole of DC/DC transducer 40 and electrokinetic cell 10.As total positive contactor K3, when always the negative contactor K2 while is closed, electrokinetic cell 10 is charged by 40 pairs of low pressure accumulate ponds 20 of DC/DC transducer.
Heater 50 is for electrokinetic cell 10 is heated, and it can be PTC(Positive Temperature Coefficient, positive temperature coefficient) heater.Heater 50 and Vehicular charger 30 are connected to form the heater circuit of electrokinetic cell, and the heater circuit of this electrokinetic cell is provided with heating contactor K4, and charging contactor K1 also is arranged in the heater circuit of this electrokinetic cell simultaneously.When charging contactor K1, heating contactor K4 are simultaneously closed, the heater circuit of electrokinetic cell is connected, and when Vehicular charger 30 is connected with external power source, by 50 pairs of electrokinetic cells 10 of heater, is heated.
Battery management system (Battery Management System, abbreviation BMS) whether 70 need the signal (hereinafter referred to as " low pressure charging signals S ") of charging for gathering low pressure accumulate pond 20, if low pressure accumulate pond 20 needs charging because of electric weight not enough (electric deficiency phenomenon occurring), the low pressure charging signals S that output need to be charged to low pressure accumulate pond 20 is to battery management system 70.For example, when the electric weight in low pressure accumulate pond 20 is not enough to maintain battery management system 70 work when having charged lower than a critical value, judge that low pressure accumulate pond 20 needs to charge.
In one embodiment, battery management system 70 is by for example-30 ℃ of the temperature T of the electrokinetic cell 10 that collects and the first preset value T1(), for example 50 ℃ of the second preset value T2(), for example 0 ℃ of the 3rd preset value T3() compare, by the electric weight Q of the electrokinetic cell 10 that collects and preset value Q1(for example electrokinetic cell 10 specified electric quantity 15%) compare.
When T<T1, it is simultaneously closed to connect the heater circuit of electrokinetic cell 10 that battery management system 70 is controlled charging contactor K1, heating contactor K4, and Vehicular charger 30 is switched to heater 50, by 50 pairs of electrokinetic cells 10 of heater, is heated.Now, total positive contactor K3, always negative contactor K2, cooling contactor K5 are off-state.
As T1<T<T3, Q>Q1, and when battery management system 70 receives low pressure charging signals S, battery management system 70 is controlled total positive contactor K3, always negative contactor K2 is simultaneously closed to connect the charging circuit in low pressure accumulate pond 20, electrokinetic cell 10 is switched to low pressure accumulate pond 20 by DC/DC transducer 40, by 20 chargings of 10 pairs of low pressure accumulate ponds of electrokinetic cell; Battery management system 70 is controlled charging contactor K1 simultaneously, closure is to connect the heater circuit of electrokinetic cell 10 simultaneously for heating contactor K4, and Vehicular charger 30 is switched to heater 50, by 50 pairs of electrokinetic cells 10 of heater, is heated.Now, cooling contactor K5 is off-state.
As T1<T<T3, Q>Q1, but when battery management system 70 does not receive low pressure charging signals S, battery management system 70 is controlled charging contactor K1, always bears contactor K2, is heated contactor K4 closed charging circuit and heating circuit to connect electrokinetic cell 10 simultaneously simultaneously, Vehicular charger 30 is switched to electrokinetic cell 10 on the one hand, by 30 pairs of electrokinetic cells 10 of Vehicular charger, charged, 70 Vehicular chargers 30 are switched to heater 50 on the other hand, by 50 pairs of electrokinetic cells 10 of heater, are heated.Now, total positive contactor K3, cooling contactor K5 are off-state.
As T1<T<T3, during Q<Q1, battery management system 70 is controlled charging contactor K1, always bears contactor K2, is heated contactor K4 closed charging circuit and heating circuit to connect electrokinetic cell 10 simultaneously simultaneously, Vehicular charger 30 is switched to electrokinetic cell 10 on the one hand, by 30 pairs of electrokinetic cells 10 of Vehicular charger, charged, Vehicular charger 30 is switched to heater 50 on the other hand, by 50 pairs of electrokinetic cells 10 of heater, is heated.Now, total positive contactor K3, cooling contactor K5 are off-state.
As T3<T<T2, Q>Q1, and when battery management system 70 receives low pressure charging signals S, battery management system 70 is controlled total positive contactor K3, always negative contactor K2 is simultaneously closed to connect the charging circuit in low pressure accumulate pond 20, electrokinetic cell 10 is switched to low pressure accumulate pond 20 by DC/DC transducer 40, by 20 chargings of 10 pairs of low pressure accumulate ponds of electrokinetic cell.Now, charging contactor K1, heating contactor K4, cooling contactor K5 are off-state.
As T3<T<T2, Q>Q1, but when battery management system 70 does not receive low pressure charging signals S, battery management system 70 is controlled charging contactor K1, always negative contactor K2 is simultaneously closed to connect the charging circuit of electrokinetic cell 10, Vehicular charger 30 is switched to electrokinetic cell 10, by 30 pairs of electrokinetic cells 10 of Vehicular charger, is charged.Now, total positive contactor K3, heating contactor K4, cooling contactor K5 are off-state.
As T3<T<T2, during Q<Q1, battery management system 70 is controlled charging contactor K1, always negative contactor K2 is simultaneously closed to connect the charging circuit of electrokinetic cell 10, and Vehicular charger 30 is switched to electrokinetic cell 10, by 30 pairs of electrokinetic cells 10 of Vehicular charger, is charged.Now, total positive contactor K3, heating contactor K4, cooling contactor K5 are off-state.
When T>T2, it is simultaneously closed to connect the electrokinetic cell cooling circuit of electrokinetic cell 10 that battery management system 70 is controlled charging contactor K1, cooling contactor K5, Vehicular charger 30 is switched to cooling device 60, by 60 pairs of electrokinetic cells of cooling device 10, is undertaken cooling.Now, total positive contactor K3, always negative contactor K2, heating contactor K4 are off-state.
Understandably, the task that battery management system 70 is controlled execution also can be described as:
When the temperature of described electrokinetic cell 10, during lower than the first preset value T1, described battery management system 70 is controlled 50 pairs of described electrokinetic cells 10 of described heaters and is heated;
When the temperature of described electrokinetic cell 10 during higher than the second preset value T2, described battery management system 70 is controlled 60 pairs of described electrokinetic cells 10 of described cooling devices and is carried out coolingly, and wherein said the second preset value T2 is greater than described the first preset value T1;
When the temperature of described electrokinetic cell 10 between described the first preset value T1 and described the second preset value T2, the electric weight Q of described electrokinetic cell 10 is when being greater than a default charge value Q1 and described low pressure accumulate pond 20 and sending the low pressure charging signals S that needs charging, described battery management system 70 is controlled described electrokinetic cell 10 and is charged by 40 pairs of described low pressure accumulate ponds 20 of described DC/DC transducer;
When the temperature of described electrokinetic cell 10 between described the first preset value T1 and described the second preset value T2, the electric weight Q of described electrokinetic cell 10 is while being less than described default charge value Q1, described battery management system 70 is controlled 30 pairs of described electrokinetic cells 10 of described Vehicular chargers and is charged; And
When the temperature of described electrokinetic cell 10 between described the first preset value T1 and described the second preset value T2, the electric weight Q of described electrokinetic cell 10 is when being greater than described default charge value Q1 and described low pressure accumulate pond 20 and not sending the low pressure charging signals S that needs charging, described battery management system 70 is controlled 30 pairs of described electrokinetic cells 10 of described Vehicular chargers and is charged.
Further, when the temperature of described electrokinetic cell 10 between described the first preset value T1 and described the 3rd preset value T3, the electric weight Q of described electrokinetic cell 10 is when being greater than described default charge value Q1 and described low pressure accumulate pond 20 and sending the low pressure charging signals S that needs charging, described battery management system 70 is also controlled 50 pairs of described electrokinetic cells 10 of described heater and is heated;
When the temperature of described electrokinetic cell 10 between described the first preset value T1 and described the 3rd preset value T3, the electric weight Q of described electrokinetic cell 10 is while being less than described default charge value Q1, described battery management system 70 is also controlled 50 pairs of described electrokinetic cells 10 of described heater and is heated;
When the temperature of described electrokinetic cell 10 between described the first preset value T1 and described the 3rd preset value T3, the electric weight Q of described electrokinetic cell 10 is when being greater than described default charge value Q1 and described low pressure accumulate pond 20 and not sending the low pressure charging signals S that needs charging, described battery management system 70 is also controlled 50 pairs of described electrokinetic cells 10 of described heater and is heated.
Set T1=-30 ℃, T3=0 ℃, T2=50 ℃, Q1 equal electrokinetic cell specified electric quantity 15%, below enumerate example and be illustrated.
Example one: T=-18 ℃, Q equal electrokinetic cell specified electric quantity 25%, low pressure accumulate pond 20 need the charging.Now, low pressure charging signals S will be sent to battery management system 70 in low pressure accumulate pond 20.That this situation meets is above-mentioned " T1<T<T3; Q>Q1; and battery management system 70 receives low pressure charging signals S " condition, battery management system 70 is controlled total positive contactor K3, always negative contactor K2 is simultaneously closed to connect the charging circuit in low pressure accumulate pond 20, electrokinetic cell 10 is switched to low pressure accumulate pond 20 by DC/DC transducer 40, by 20 chargings of 10 pairs of low pressure accumulate ponds of electrokinetic cell; Battery management system 70 is controlled charging contactor K1 simultaneously, closure is to connect the heater circuit of electrokinetic cell 10 simultaneously for heating contactor K4, and Vehicular charger 30 is switched to heater 50, by 50 pairs of electrokinetic cells 10 of heater, is heated.Now, cooling contactor K5 is off-state.
Example two: T=-20 ℃, Q equal electrokinetic cell specified electric quantity 10%.The condition that this situation meets above-mentioned " T1<T<T3; Q<Q1 ", battery management system 70 is controlled charging contactor K1, always bears contactor K2, is heated contactor K4 closed charging circuit and heating circuit to connect electrokinetic cell 10 simultaneously simultaneously, Vehicular charger 30 is switched to electrokinetic cell 10 on the one hand, by 30 pairs of electrokinetic cells 10 of Vehicular charger, charged, Vehicular charger 30 is switched to heater 50 on the other hand, by 50 pairs of electrokinetic cells 10 of heater, is heated.Now, total positive contactor K3, cooling contactor K5 are off-state.
Example three: T=28 ℃, Q equal electrokinetic cell specified electric quantity 30%, low pressure accumulate pond 20 need the charging.Now, low pressure charging signals S will be sent to battery management system 70 in low pressure accumulate pond 20.That this situation meets is above-mentioned " T3<T<T2; Q>Q1; and battery management system 70 receives low pressure charging signals S " condition, battery management system 70 is controlled total positive contactor K3, always negative contactor K2 is simultaneously closed to connect the charging circuit in low pressure accumulate pond 20, electrokinetic cell 10 is switched to low pressure accumulate pond 20 by DC/DC transducer 40, by 20 chargings of 10 pairs of low pressure accumulate ponds of electrokinetic cell.Now, charging contactor K1, heating contactor K4, cooling contactor K5 are off-state.
Example four: T=38 ℃, Q equal electrokinetic cell specified electric quantity 25%, low pressure accumulate pond 20 do not need the charging.Now, battery management system 70 will can not receive the low pressure charging signals S from low pressure accumulate pond 20.That this situation meets is above-mentioned " T3<T<T2; Q>Q1; but battery management system 70 does not receive low pressure charging signals S " condition, battery management system 70 is controlled charging contactor K1, always negative contactor K2 is simultaneously closed to connect the charging circuit of electrokinetic cell 10, Vehicular charger 30 is switched to electrokinetic cell 10, by 30 pairs of electrokinetic cells 10 of Vehicular charger, is charged.Now, total positive contactor K3, heating contactor K4, cooling contactor K5 are off-state.
The flow chart of the battery charging control method of the electric automobile that Fig. 2 is better embodiment of the present invention.Please refer to Fig. 2, the step of the battery charging control method of the electric automobile of better embodiment of the present invention comprises:
(1) gather temperature T and the electric weight Q of electrokinetic cell;
(2) whether the temperature T that judges electrokinetic cell is less than or equal to for example-30 ℃ of the first preset value T1(), if so, electrokinetic cell 10 is heated; Otherwise, execution step (3);
(3) whether the temperature T that judges electrokinetic cell is less than or equal to for example 0 ℃ of the 3rd preset value T3(), wherein the 3rd preset value T3 is greater than the first preset value T1; If so, execution step (3.1); Otherwise, execution step (4);
(3.1) electric weight that judges electrokinetic cell 10 whether be more than or equal to preset value Q1(for example electrokinetic cell specified electric quantity 15%), if so, execution step (3.1.1); Otherwise, electrokinetic cell 10 is heated simultaneously and is charged;
(3.1.1) judge whether low pressure accumulate pond 20 sends low pressure charging signals S, if so, charged in low pressure accumulate pond 20, and electrokinetic cell 10 is heated simultaneously; Otherwise, electrokinetic cell 10 is heated simultaneously and is charged;
(4) whether the temperature T that judges electrokinetic cell is less than or equal to for example 50 ℃ of the second preset value T2(), wherein the second preset value T2 is greater than the 3rd preset value T3; If so, execution step (5); Otherwise, to electrokinetic cell 10, carry out cooling;
(5) electric weight that judges electrokinetic cell 10 whether be more than or equal to preset value Q1(for example electrokinetic cell specified electric quantity 15%), if so, execution step (6); Otherwise, electrokinetic cell 10 is charged;
(6) judge whether low pressure accumulate pond 20 sends the low pressure charging signals, if so, charged in low pressure accumulate pond 20; Otherwise, electrokinetic cell 10 is charged.
For the further details of step (1) to (6), can with reference in above-described embodiment about the associated description of battery charging controller, be not repeated herein.
Understandably, the step of the battery charging control method of above-mentioned electric automobile also can be described as:
Whether the temperature T of collection electrokinetic cell 10 and electric weight Q and low pressure accumulate pond 20 need the low pressure charging signals S of charging;
The temperature of electrokinetic cell 10 during lower than the first preset value T1, is controlled 50 pairs of electrokinetic cells 10 of heater and is heated;
The temperature of electrokinetic cell 10 is during higher than the second preset value T2, controls 60 pairs of electrokinetic cells of cooling device 10 and carries out coolingly, and wherein the second preset value T2 is greater than the first preset value T1;
The temperature of electrokinetic cell 10 between the first preset value T1 and the second preset value T2, the electric weight Q of electrokinetic cell 10 is when being greater than a default charge value Q1 and low pressure accumulate pond 20 and sending the low pressure charging signals S that needs charging, control electrokinetic cell 10 and charged by 40 pairs of low pressure accumulate ponds 20 of DC/DC transducer;
The temperature of electrokinetic cell 10 between the first preset value T1 and the second preset value T2 and the electric weight Q of electrokinetic cell 10 while being less than default charge value Q1, is controlled 30 pairs of electrokinetic cells 10 of Vehicular charger and is charged;
The temperature of electrokinetic cell 10 between the first preset value T1 and the second preset value T2, the electric weight Q of electrokinetic cell 10 is when being greater than default charge value Q1 and low pressure accumulate pond 20 and not sending the low pressure charging signals S that needs charging, control 30 pairs of electrokinetic cells 10 of Vehicular charger and charged.
Further, when the temperature of described electrokinetic cell 10 between described the first preset value T1 and described the 3rd preset value T3, the electric weight Q of described electrokinetic cell 10 is when being greater than described default charge value Q1 and receiving low pressure charging signals S, also comprises that controlling 50 pairs of described electrokinetic cells 10 of heater is heated;
When the temperature of described electrokinetic cell 10 between described the first preset value T1 and described the 3rd preset value T3, the electric weight Q of described electrokinetic cell 10 is while being less than described default charge value Q1, also comprises that controlling 50 pairs of described electrokinetic cells 10 of heater is heated;
When the temperature of described electrokinetic cell 10 between described the first preset value T1 and described the 3rd preset value T3, the electric weight Q of described electrokinetic cell 10 is when being greater than described default charge value Q1 and described low pressure accumulate pond 20 and not sending the low pressure charging signals S that needs charging, also comprises that controlling 50 pairs of described electrokinetic cells 10 of heater is heated.
The battery charging controller of electric automobile of the present invention and method, by temperature parameter T, the electrical parameter Q of 70 collection electrokinetic cells 10 and the low pressure charging signals S in low pressure accumulate pond 20, these parameters and signal are carried out to Treatment Analysis, and make following different processing mode according to different analysis results: (1) is heated electrokinetic cell 10; (2) charged and electrokinetic cell 10 is heated simultaneously in low pressure accumulate pond 20; (3) electrokinetic cell 10 is heated simultaneously and charged; (4) charged in low pressure accumulate pond 20; (5) electrokinetic cell 10 is charged; (6) to electrokinetic cell 10, carry out cooling.
Can learn the impact of the ambient temperature that electrokinetic cell 10 is subject to by the temperature parameter T of electrokinetic cell 10, the present invention has taken into full account the impact of ambient temperature on electrokinetic cell 10 chargings when charging.When ambient temperature is too low, by 50 pairs of electrokinetic cells 10 of heater, heated; When ambient temperature is too high, by 60 pairs of electrokinetic cells of cooling device 10, undertaken cooling.So, can make electrokinetic cell 10 be in an ambient temperature that can charge normal, thereby avoid in charging process, electrokinetic cell 10 is subject to the impact of ambient temperature and the phenomenon that can't charge occurs.
Low pressure accumulate pond 20 provides power supply for battery management system 70, and battery management system 70 is controlled the charging of electrokinetic cell 10, therefore hang down can not maintain battery management system 70 and work the time electrokinetic cell 10 interruption of just can't charging or charge when the electric weight in low pressure accumulate pond 20.And the present invention fully takes into account the impact of low pressure accumulate pond 20 on electrokinetic cell 10 chargings when charging, in low pressure accumulate pond 20, power shortage appears and the electric weight of needs chargings and electrokinetic cell 10 while being greater than preset value Q1, by 10 pairs of low pressure accumulate ponds 20 of electrokinetic cell, charged, can avoid can't working because of the too low battery management system 70 that causes of low pressure accumulate pond 20 electric weight, so that the electrokinetic cell interruption of can not charging or charge, in the process of avoid being charged at electrokinetic cell 10 thereby (fill soon, trickle charge), the electric deficiency phenomenon that low pressure accumulate pond 20 likely occurs.
Therefore, the battery charging controller of electric automobile of the present invention and method, consider the ambient temperature of electrokinetic cell 10 and the electric weight factor in low pressure accumulate pond 20, when ambient temperature is low, first by 50 pairs of electrokinetic cells 10 of heater, heated, and then charged, and by electrokinetic cell 10, by 40 pairs of low pressure accumulate ponds 20 of DC/DC transducer, charged while simultaneously in low pressure accumulate pond 20, power shortage occurring, the charging environment that can make electrokinetic cell 10 is safety and stability more.
The above, only embodiments of the invention, not the present invention is done to any pro forma restriction, although the present invention discloses as above with embodiment, yet not in order to limit the present invention, any those skilled in the art, within not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be not break away from the technical solution of the present invention content, any simple modification of above embodiment being done according to technical spirit of the present invention, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (10)
1. the battery charging controller of an electric automobile (100) comprising:
Electrokinetic cell (10), be used to electric automobile that driving power is provided;
Low pressure accumulate pond (20);
Heater (50), for heating described electrokinetic cell (10);
Cooling device (60), for cooling described electrokinetic cell (10);
Vehicular charger (30), for exporting to described electrokinetic cell (10), described heater (50) and described cooling device (60) after the conversion of the electric energy by external power source;
DC/DC transducer (40), for exporting to described low pressure accumulate pond (20) after the conversion of the electric energy by described electrokinetic cell (10); And
Battery management system (70), provide low-tension supply by described low pressure accumulate pond (20) for described battery management system (70), whether described battery management system (70) needs the low pressure charging signals (S) of charging for the temperature parameter according to described electrokinetic cell (10) (T) and electrical parameter (Q) and described low pressure accumulate pond (20), control the following task of carrying out:
When the temperature of described electrokinetic cell (10), during lower than the first preset value (T1), described battery management system (70) is controlled described heater (50) described electrokinetic cell (10) is heated;
When the temperature of described electrokinetic cell (10) during higher than the second preset value (T2), described battery management system (70) is controlled described cooling device (60) and described electrokinetic cell (10) is carried out cooling, and wherein said the second preset value (T2) is greater than described the first preset value (T1);
When the temperature of described electrokinetic cell (10) between described the first preset value (T1) and described the second preset value (T2), the electric weight (Q) of described electrokinetic cell (10) is when being greater than a default charge value (Q1) and described low pressure accumulate pond (20) and sending the low pressure charging signals (S) that needs charging, described battery management system (70) is controlled described electrokinetic cell (10) and by described DC/DC transducer (40), is charged in described low pressure accumulate pond (20);
When the temperature of described electrokinetic cell (10), between described the first preset value (T1) and described the second preset value (T2) and the electric weight (Q) of described electrokinetic cell (10) while being less than described default charge value (Q1), described battery management system (70) is controlled described Vehicular charger (30) described electrokinetic cell (10) is charged; And
When the temperature of described electrokinetic cell (10) between described the first preset value (T1) and described the second preset value (T2), the electric weight (Q) of described electrokinetic cell (10) is when being greater than described default charge value (Q1) and described low pressure accumulate pond (20) and not sending the low pressure charging signals (S) that needs charging, described battery management system (70) is controlled described Vehicular charger (30) described electrokinetic cell (10) is charged.
2. the battery charging controller of electric automobile as claimed in claim 1 (100) is characterized in that: described battery management system (70) is also further controlled the following task of carrying out:
When the temperature of described electrokinetic cell (10) between described the first preset value (T1) and the 3rd preset value (T3), the electric weight (Q) of described electrokinetic cell (10) is when being greater than described default charge value (Q1) and described low pressure accumulate pond (20) and sending the low pressure charging signals (S) that needs charging, described battery management system (70) is also controlled described heater (50) described electrokinetic cell (10) is heated, and wherein said the 3rd preset value (T3) is greater than described the first preset value (T1) but lower than described the second preset value (T2);
When the temperature of described electrokinetic cell (10) between described the first preset value (T1) and described the 3rd preset value (T3), the electric weight (Q) of described electrokinetic cell (10) is while being less than described default charge value (Q1), described battery management system (70) is also controlled described heater (50) described electrokinetic cell (10) is heated;
When the temperature of described electrokinetic cell (10) between described the first preset value (T1) and described the 3rd preset value (T3), the electric weight (Q) of described electrokinetic cell (10) is when being greater than described default charge value (Q1) and described low pressure accumulate pond (20) and not sending the low pressure charging signals (S) that needs charging, described battery management system (70) is also controlled described heater (50) described electrokinetic cell (10) is heated.
3. the battery charging controller of electric automobile as claimed in claim 1 (100), is characterized in that: the charging circuit that forms described electrokinetic cell (10) between described electrokinetic cell (10) and described Vehicular charger (30); In the charging circuit of described electrokinetic cell (10), be provided with charging contactor (K1) between the positive pole of described Vehicular charger (30) and described electrokinetic cell (10), be provided with total negative contactor (K2) between the negative pole of described Vehicular charger (30) and described electrokinetic cell (10); Described battery management system (70) is closed to connect the charging circuit of described electrokinetic cell (10) by controlling described charging contactor (K1) and described total negative contactor (K2) while.
4. the battery charging controller of electric automobile as claimed in claim 3 (100), it is characterized in that: described DC/DC transducer (40) is located between described electrokinetic cell (10) and described low pressure accumulate pond (20), be provided with total positive contactor (K3) between the positive pole of described DC/DC transducer (40) and described electrokinetic cell (10), described total negative contactor (K2) is positioned between the negative pole of described DC/DC transducer (40) and described electrokinetic cell (10); Described battery management system (70) by control described total positive contactor (K3) and described total negative contactor (K2) simultaneously closed so that described electrokinetic cell (10) by described DC/DC transducer (40), charged in described low pressure accumulate pond (20).
5. the battery charging controller of electric automobile as claimed in claim 4 (100), it is characterized in that: described heater (50) and described Vehicular charger (30) are connected to form the heater circuit of described electrokinetic cell (10), described charging contactor (K1) is positioned at the heater circuit of described electrokinetic cell (10) simultaneously, and the heater circuit of described electrokinetic cell (10) also is provided with heating contactor (K4); Described battery management system (70) is simultaneously closed to connect the heater circuit of described electrokinetic cell (10) by controlling described charging contactor (K1) and described heating contactor (K4).
6. the battery charging controller of electric automobile as claimed in claim 5 (100), it is characterized in that: described cooling device (60) and described Vehicular charger (30) are connected to form the cooling circuit of described electrokinetic cell (10), described charging contactor (K1) is positioned at the cooling circuit of described electrokinetic cell (10) simultaneously, and the cooling circuit of described electrokinetic cell (10) also is provided with cooling contactor (K5); Described battery management system (70) is simultaneously closed to connect the cooling circuit of described electrokinetic cell (10) by controlling described charging contactor (K1) and described cooling contactor (K5).
7. as the battery charging controller (100) of the described electric automobile of claim 1 to 6 any one, it is characterized in that: described the first preset value (T1) is-30 ℃, and described the second preset value (T2) is 50 ℃, and described the 3rd preset value (T3) is 0 ℃.
8. as the battery charging controller (100) of the described electric automobile of claim 1 to 6 any one, it is characterized in that: 15% of the specified electric quantity that described default charge value (Q1) is described electrokinetic cell (10).
9. the battery charging control method of an electric automobile, step comprises:
(1) whether the temperature (T) of collection electrokinetic cell (10) and electric weight (Q) and low pressure accumulate pond (20) need the low pressure charging signals (S) of charging;
(2), when the temperature of electrokinetic cell (10) is lower than the first preset value (T1), controls heater (50) electrokinetic cell (10) is heated;
(3) when the temperature of electrokinetic cell (10) is higher than the second preset value (T2), control cooling device (60) carries out cooling to electrokinetic cell (10), and wherein the second preset value (T2) is greater than the first preset value (T1);
(4) temperature of electrokinetic cell (10) between the first preset value (T1) and the second preset value (T2), the electric weight (Q) of electrokinetic cell (10) is when being greater than a default charge value (Q1) and low pressure accumulate pond (20) and sending the low pressure charging signals (S) that needs charging, control electrokinetic cell (10) and by DC/DC transducer (40), charged in low pressure accumulate pond (20);
(5) temperature of electrokinetic cell (10) between the first preset value (T1) and the second preset value (T2) and the electric weight (Q) of electrokinetic cell (10) while being less than default charge value (Q1), is controlled Vehicular charger (30) electrokinetic cell (10) is charged;
(6) temperature of electrokinetic cell (10) between the first preset value (T1) and the second preset value (T2), the electric weight (Q) of electrokinetic cell (10) is when being greater than default charge value (Q1) and low pressure accumulate pond (20) and not sending the low pressure charging signals (S) that needs charging, control Vehicular charger (30) electrokinetic cell (10) charged.
10. the battery charging control method of electric automobile as claimed in claim 9, it is characterized in that: when the temperature of described electrokinetic cell (10) between described the first preset value (T1) and the 3rd preset value (T3), the electric weight (Q) of described electrokinetic cell (10) is greater than described default charge value (Q1), and when the low pressure charging signals (S) that needs charging is sent in described low pressure accumulate pond (20), also comprise that controlling described heater (50) is heated described electrokinetic cell (10), wherein said the 3rd preset value (T3) is greater than described the first preset value (T1) but lower than described the second preset value (T2),
When the temperature of described electrokinetic cell (10) between described the first preset value (T1) and described the 3rd preset value (T3), the electric weight (Q) of described electrokinetic cell (10) is while being less than described default charge value (Q1), also comprises that controlling described heater (50) is heated described electrokinetic cell (10);
When the temperature of described electrokinetic cell (10) between described the first preset value (T1) and described the 3rd preset value (T3), the electric weight (Q) of described electrokinetic cell (10) is when being greater than described default charge value (Q1) and described low pressure accumulate pond (20) and not sending the low pressure charging signals (S) that needs charging, also comprises that controlling described heater (50) is heated described electrokinetic cell (10).
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