CN103475041B - The battery charging controller and method of electric automobile - Google Patents
The battery charging controller and method of electric automobile Download PDFInfo
- Publication number
- CN103475041B CN103475041B CN201310358819.0A CN201310358819A CN103475041B CN 103475041 B CN103475041 B CN 103475041B CN 201310358819 A CN201310358819 A CN 201310358819A CN 103475041 B CN103475041 B CN 103475041B
- Authority
- CN
- China
- Prior art keywords
- electrokinetic cell
- preset value
- low pressure
- battery
- charging
- Prior art date
Links
- 238000001816 cooling Methods 0.000 claims abstract description 56
- 238000006243 chemical reactions Methods 0.000 claims abstract description 7
- 241001081830 Degeneriaceae Species 0.000 claims description 18
- 238000010438 heat treatment Methods 0.000 claims description 16
- 210000004027 cells Anatomy 0.000 description 225
- 238000000034 methods Methods 0.000 description 4
- 239000002253 acids Substances 0.000 description 3
- 238000004458 analytical methods Methods 0.000 description 2
- 238000005516 engineering processes Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N lithium Chemical compound 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[Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000000203 mixtures Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 210000000352 storage cell Anatomy 0.000 description 1
Classifications
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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
Description
Technical field
The present invention relates to the battery charging controller and method in electric automobile field, more particularly to a kind of electric automobile.
Background technology
The battery of electric automobile includes electrokinetic cell and low pressure storage battery, wherein electrokinetic cell be used to providing high voltage power supply with For running car, it is battery pack that it is typically made up of multiple battery cells;And low pressure storage battery is used for for battery management system etc. Mobile unit provides low-tension supply.Electrokinetic cell (such as lead-acid accumulator, cadmium-nickel storage cell, lithium storage battery) work a period of time Afterwards, electricity can be reduced to can not provide enough power for automobile, at this moment need to charge to electrokinetic cell to supplement the energy. In charging process, electrokinetic cell is influenceed that the phenomenon that can not be charged occurs by environment temperature, therefore, needs to fill in charging Divide the influence for considering environment temperature to power battery charging.
Battery management system is used for the charging for managing and controlling electrokinetic cell, and battery management system fills in control electrokinetic cell Electricity process in, provide low-tension supply for battery management system by low pressure storage battery, when the electricity of low pressure storage battery it is low arrive can not When maintaining battery management system normal work, electrokinetic cell just can not charge or charge interruption, therefore, be filled in electrokinetic cell During electric (fast charge, trickle charge), low pressure storage battery is possible to that electric deficiency phenomenon occurs.
The content of the invention
The present invention provides a kind of battery charging controller of electric automobile, while in view of the environment temperature of electrokinetic cell With the influence of the electricity of low pressure storage battery to power battery charging, make the charging environment more safety and stability of electrokinetic cell.
In addition, the method that the present invention also provides the battery charging controller of the above-mentioned electric automobile of application.
In order to achieve the above-mentioned advantages, the present invention provides a kind of battery charging controller of electric automobile, including:
Electrokinetic cell, for providing driving power for electric automobile;
Low pressure storage battery;
Heater, for heating the electrokinetic cell;
Cooling device, for cooling down the electrokinetic cell;
Vehicular charger, for being exported after the electric energy conversion by external power source to the electrokinetic cell, the heater And the cooling device;
DC/DC converters, for being exported after the electric energy conversion by the electrokinetic cell to the low pressure storage battery;And
Battery management system, low-tension supply, the battery are provided for the battery management system by the low pressure storage battery Whether management system is used to need to fill according to the temperature parameter and electrical parameter and the low pressure storage battery of the electrokinetic cell The low pressure charging signals of electricity, control perform following task:
When the temperature of the electrokinetic cell is less than the first preset value, the battery management system controls the heater The electrokinetic cell is heated;
When the temperature of the electrokinetic cell is higher than the second preset value, the battery management system controls the cooling device The electrokinetic cell is cooled down, wherein second preset value is more than first preset value;
When the temperature of the electrokinetic cell is between first preset value and second preset value, the power electric It is described when the electricity in pond is more than a default charge value and the low pressure storage battery and sends the low pressure charging signals for needing to charge Battery management system controls the electrokinetic cell to be charged by the DC/DC converters to the low pressure storage battery;
When the temperature of the electrokinetic cell is between first preset value and second preset value and the power When the electricity of battery is less than the default charge value, the battery management system controls the Vehicular charger to the power electric Charged in pond;And
When the temperature of the electrokinetic cell is between first preset value and second preset value, the power electric When the electricity in pond is more than the default charge value and the low pressure storage battery and does not send the low pressure charging signals for needing to charge, institute Stating battery management system controls the Vehicular charger to charge the electrokinetic cell;
When the temperature of the electrokinetic cell is between first preset value and the 3rd preset value, the power electric It is described when the electricity in pond is more than the default charge value and the low pressure storage battery and sends the low pressure charging signals for needing to charge Battery management system also controls the heater to heat the electrokinetic cell, wherein the 3rd preset value is more than institute State the first preset value but be less than second preset value;
When the temperature of the electrokinetic cell is between first preset value and the 3rd preset value, the power electric When the electricity in pond is less than the default charge value, the battery management system also controls the heater to the electrokinetic cell Heated;
When the temperature of the electrokinetic cell is between first preset value and the 3rd preset value, the power electric When the electricity in pond is more than the default charge value and the low pressure storage battery and does not send the low pressure charging signals for needing to charge, institute Stating battery management system also controls the heater to heat the electrokinetic cell.
In one embodiment of the invention, the power electric is formed between the electrokinetic cell and the Vehicular charger The charging circuit in pond;In the charging circuit of the electrokinetic cell, the positive pole of the Vehicular charger and the electrokinetic cell it Between be provided with charging contactor, always negative contactor is provided between the Vehicular charger and the negative pole of the electrokinetic cell;The electricity Pond management system is by controlling the charging contactor and the always negative contactor to be closed to connect the electrokinetic cell Charging circuit.
In one embodiment of the invention, the DC/DC converters are located at the electrokinetic cell and the low pressure storing up electricity Total positive contactor, the always negative contactor position are provided between pond, between the DC/DC converters and the positive pole of the electrokinetic cell Between the DC/DC converters and the negative pole of the electrokinetic cell;The battery management system described is always just being connect by controlling Tentaculum and the always negative contactor be closed at so that the electrokinetic cell by the DC/DC converters to the low pressure storing up electricity Charged in pond.
In one embodiment of the invention, the heater is connected to form the power electric with the Vehicular charger The heater circuit in pond, the charging contactor is simultaneously positioned at the heater circuit of the electrokinetic cell, the heating of the electrokinetic cell Circuit is additionally provided with also contacts device;The battery management system is same by controlling the charging contactor and the also contacts device When close to connect the heater circuit of the electrokinetic cell.
In one embodiment of the invention, the cooling device is connected to form the power electric with the Vehicular charger The cooling circuit in pond, the charging contactor is simultaneously positioned at the cooling circuit of the electrokinetic cell, the cooling of the electrokinetic cell Circuit is additionally provided with cooling contactor;The battery management system is same by controlling the charging contactor and the cooling contactor When close to connect the cooling circuit of the electrokinetic cell.
In one embodiment of the invention, first preset value is -30 DEG C, and second preset value is 50 DEG C, institute The 3rd preset value is stated as 0 DEG C.
In one embodiment of the invention, the default charge value is the 15% of the specified electric quantity of the electrokinetic cell.
The present invention also provides a kind of battery charging control method of electric automobile, and step includes:
(1) whether the temperature of collection electrokinetic cell and electricity and low pressure storage battery need the low pressure charging signals to charge;
(2) when the temperature of electrokinetic cell is less than the first preset value, control heater heats to electrokinetic cell;
(3) when the temperature of electrokinetic cell is higher than the second preset value, control cooling device cools down to electrokinetic cell, wherein Second preset value is more than the first preset value;
(4) temperature of electrokinetic cell between the first preset value and the second preset value, the electricity of electrokinetic cell be more than one When individual default charge value and low pressure storage battery send the low pressure charging signals for needing to charge, control electrokinetic cell is turned by DC/DC Parallel operation charges to low pressure storage battery;
(5) temperature of electrokinetic cell is between the first preset value and the second preset value and the electricity of electrokinetic cell is less than During default charge value, control Vehicular charger charges to electrokinetic cell;
(6) temperature of electrokinetic cell between the first preset value and the second preset value, the electricity of electrokinetic cell be more than it is pre- If charge value and low pressure storage battery do not send the low pressure charging signals for needing to charge, control Vehicular charger is to electrokinetic cell Charged;.
When the temperature of the electrokinetic cell is between first preset value and the 3rd preset value, the power electric When the electricity in pond is more than the default charge value and the low pressure storage battery and sends the low pressure charging signals for needing to charge, also wrap Include the control heater to heat the electrokinetic cell, wherein the 3rd preset value is more than first preset value But it is less than second preset value;
When the temperature of the electrokinetic cell is between first preset value and the 3rd preset value, the power electric When the electricity in pond is less than the default charge value, in addition to the control heater heats to the electrokinetic cell;
When the temperature of the electrokinetic cell is between first preset value and the 3rd preset value, the power electric When the electricity in pond is more than the default charge value and the low pressure storage battery and does not send the low pressure charging signals for needing to charge, also Including controlling the heater to heat the electrokinetic cell.
The present invention electric automobile battery charging controller and method, consider electrokinetic cell environment temperature and The electricity factor of low pressure storage battery, when environment temperature is relatively low first pass through heater heats to electrokinetic cell, Ran Houzai Charged, and low pressure storage battery is entered by DC/DC converters by electrokinetic cell when power shortage occurs in low pressure storage battery simultaneously Row charging, the charging environment more safety and stability of electrokinetic cell can be made.
For above and other objects of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly, And coordinate institute's accompanying drawings, it is described in detail below.
Brief description of the drawings
Fig. 1 is the structural representation of the battery charging controller of the electric automobile of better embodiment of the present invention.
Fig. 2 is the flow chart of the battery charging control method of the electric automobile of better embodiment of the present invention.
Embodiment
Fig. 1 is the structural representation of the battery charging controller of the electric automobile of better embodiment of the present invention.It please join According to Fig. 1, the battery charging controller of electric automobile includes electrokinetic cell 10, low pressure storage battery 20, Vehicular charger 30, DC/ DC converters 40, heater 50, cooling device 60 and battery management system 70.
By multiple electrokinetic cell monomer compositions, high voltage power supply typically is provided for electric automobile for electrokinetic cell 10.Battery cell Can be the storage batteries such as lead-acid accumulator, nickel-hydrogen accumulator, lithium storage battery.The operating voltage of electrokinetic cell 10 typically 300V with On.
Vehicular charger 30 can be DC charging motor or AC charging machine, and it is used to be connected with external power source, by outside Exported after the electric energy conversion of power supply to electrokinetic cell 10, heater 50 and cooling device 60.
The charging circuit of electrokinetic cell is formed between electrokinetic cell 10 and Vehicular charger 30, and Vehicular charger 30 is with moving Charging contactor K1 is provided between the positive pole of power battery 10, is provided between Vehicular charger 30 and the negative pole of electrokinetic cell 10 total negative Contactor K2.When charging contactor K1 and total negative contactor K2 are closed at, the charging circuit of electrokinetic cell is connected, vehicle-mounted to fill Motor 30 charges to electrokinetic cell 10.
Low pressure storage battery 20 can be lead-acid accumulator, and operating voltage is in 12V or so.Low pressure storage battery 20 is used for cell tube The other electric power supplies to be worked in reason system 70 and charging process.
DC/DC converters 40 are located between electrokinetic cell 10 and low pressure storage battery 20, are that one kind can be by high voltage direct current Source is converted to the converter of low-voltage dc power supply, for being filled with low pressure storage battery 20 after the electric energy conversion by electrokinetic cell 10.DC/ Total positive contactor K3 is provided between the positive pole of DC converters 40 and electrokinetic cell 10, always negative contactor K2 is located at DC/DC converters Between 40 and the negative pole of electrokinetic cell 10.When total positive contactor K3, total negative contactor K2 are closed at, electrokinetic cell 10 passes through DC/DC converters 40 charge to low pressure storage battery 20.
Heater 50 is used to heat electrokinetic cell 10, and it can be PTC (Positive Temperature Coefficient, positive temperature coefficient) heater.Heater 50 is connected the heating to form electrokinetic cell with Vehicular charger 30 Circuit, the heater circuit of the electrokinetic cell also are located at the electrokinetic cell simultaneously provided with also contacts device K4, charging contactor K1 In heater circuit.When charging contactor K1, also contacts device K4 are closed at, the heater circuit of electrokinetic cell is connected, in car When carrying charger 30 with external power source connection, electrokinetic cell 10 is heated by heater 50.
Cooling device 60 is used to cool down electrokinetic cell 10, and it can be motor compressor.Cooling device 60 and car Carry the connection of charger 30 and form electrokinetic cell cooling circuit, electrokinetic cell cooling circuit is provided with cooling contactor K5, charging Tentaculum K1 also is located in electrokinetic cell cooling circuit simultaneously.When charging contactor K1, cooling contactor K5 are closed at, move Power battery cooling circuit is connected, and when Vehicular charger 30 and external power source are connected, electrokinetic cell 10 is entered by cooling device 60 Row cooling.
Battery management system (Battery Management System, abbreviation BMS) 70 is used to gather low pressure storage battery 20 The signal (hereinafter referred to as " low pressure charging signals S ") for whether needing to charge, if low pressure storage battery 20 is because not enough power supply (is Existing electric deficiency phenomenon) and need to charge, then output needs the low pressure charging signals S that is charged to low pressure storage battery 20 to cell tube Reason system 70.For example, worked when the electricity of low pressure storage battery 20 is not enough to maintenance battery management system 70 less than a critical value To during charging complete, then judging that low pressure storage battery 20 needs to charge.
Battery management system 70 is additionally operable to gather the temperature parameter T and electrical parameter Q of electrokinetic cell 10, to the temperature collected Degree parameter T, electrical parameter Q and low pressure charging signals S are analyzed and processed, and are optionally controlled according to result and always just connect Tentaculum K3, total negative contactor K2, charging contactor K1, also contacts device K4, cooling contactor K5 closed and disconnected.
In one embodiment, battery management system 70 is by the temperature T and the first preset value of the electrokinetic cell 10 collected T1 (such as -30 DEG C), the second preset value T2 (such as 50 DEG C), the 3rd preset value T3 (such as 0 DEG C) are compared, and will be collected Electrokinetic cell 10 electricity Q and preset value Q1 (such as 15% of the specified electric quantity of electrokinetic cell 10) compared with.
As T < T1, it is dynamic to connect that battery management system 70 controls charging contactor K1, also contacts device K4 to be closed at The heater circuit of power battery 10, Vehicular charger 30 are switched to heater 50, and electrokinetic cell 10 is carried out by heater 50 Heating.Now, total positive contactor K3, total 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 The total positive contactor K3 of 70 controls, always negative contactor K2 is closed to connect the charging circuit of low pressure storage battery 20, electrokinetic cell 10 are switched to low pressure storage battery 20 by DC/DC converters 40, and low pressure storage battery 20 is charged by electrokinetic cell 10;Battery simultaneously Management system 70 controls charging contactor K1, also contacts device K4 to be closed to connect the heater circuit of electrokinetic cell 10, car Carry charger 30 and be switched to heater 50, electrokinetic cell 10 is heated by heater 50.Now, contactor K5 is cooled down For off-state.
As T1 < T < T3, Q > Q1, but when battery management system 70 is not received by low pressure charging signals S, battery management System 70 controls charging contactor K1, always negative contactor K2, also contacts device K4 are closed to be also turned on electrokinetic cell 10 Charging circuit and heating circuit, one side Vehicular charger 30 is switched to electrokinetic cell 10, by Vehicular charger 30 to power Battery 10 is charged, and on the other hand 70 Vehicular chargers 30 are switched to heater 50, by heater 50 to electrokinetic cell 10 are heated.Now, total positive contactor K3, cooling contactor K5 are off-state.
As T1 < T < T3, Q < Q1, battery management system 70 controls charging contactor K1, always negative contactor K2, heating Contactor K4 is closed to be also turned on the charging circuit of electrokinetic cell 10 and heating circuit, and one side Vehicular charger 30 connects Electrokinetic cell 10 is passed to, electrokinetic cell 10 is charged by Vehicular charger 30, another aspect Vehicular charger 30 is switched to Heater 50, electrokinetic cell 10 is heated by heater 50.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 The total positive contactor K3 of 70 controls, always negative contactor K2 is closed to connect the charging circuit of low pressure storage battery 20, electrokinetic cell 10 are switched to low pressure storage battery 20 by DC/DC converters 40, and low pressure storage battery 20 is charged by electrokinetic cell 10.Now, fill Electric contactor K1, also contacts device K4, cooling contactor K5 are off-state.
As T3 < T < T2, Q > Q1, but when battery management system 70 is not received by low pressure charging signals S, battery management System 70 controls charging contactor K1, always negative contactor K2 is closed to connect the charging circuit of electrokinetic cell 10, vehicle-mounted to fill Motor 30 is switched to electrokinetic cell 10, and electrokinetic cell 10 is charged by Vehicular charger 30.Now, total positive contactor K3, Also contacts device K4, cooling contactor K5 are off-state.
As T3 < T < T2, Q < Q1, battery management system 70 controls charging contactor K1, always negative contactor K2 is closed simultaneously Close to connect the charging circuit of electrokinetic cell 10, Vehicular charger 30 is switched to electrokinetic cell 10, by Vehicular charger 30 to dynamic Power battery 10 is charged.Now, total positive contactor K3, also contacts device K4, cooling contactor K5 are off-state.
As T > T2, it is dynamic to connect that battery management system 70 controls charging contactor K1, cooling contactor K5 to be closed at The electrokinetic cell cooling circuit of power battery 10, Vehicular charger 30 is switched to cooling device 60, by cooling device 60 to power electric Pond 10 is cooled down.Now, total positive contactor K3, total negative contactor K2, also contacts device K4 are off-state.
It is to be appreciated that the task that the control of battery management system 70 performs can also be described as:
When the temperature of the electrokinetic cell 10 is less than the first preset value T1, the battery management system 70 controls described add Thermal 50 heats to the electrokinetic cell 10;
When the temperature of the electrokinetic cell 10 is higher than the second preset value T2, the battery management system 70 controls described cold But device 60 cools down to the electrokinetic cell 10, wherein the second preset value T2 is more than the first preset value T1;
When the electrokinetic cell 10 temperature between the first preset value T1 and the second preset value T2, it is described The electricity Q of electrokinetic cell 10 is more than a default charge value Q1 and the low pressure storage battery 20 sends the low pressure for needing to charge and filled During electric signal S, the battery management system 70 controls the electrokinetic cell 10 by the DC/DC converters 40 to the low pressure Storage battery 20 is charged;
When the electrokinetic cell 10 temperature between the first preset value T1 and the second preset value T2, it is described When the electricity Q of electrokinetic cell 10 is less than the default charge value Q1, the battery management system 70 controls the Vehicular charger 30 pairs of electrokinetic cells 10 charge;And
When the electrokinetic cell 10 temperature between the first preset value T1 and the second preset value T2, it is described The electricity Q of electrokinetic cell 10 is more than the default charge value Q1 and the low pressure storage battery 20 does not send the low pressure for needing to charge During charging signals S, the battery management system 70 controls the Vehicular charger 30 to charge the electrokinetic cell 10.
Further, when the temperature of the electrokinetic cell 10 is between the first preset value T1 and the 3rd preset value T3 Between, the electricity Q of the electrokinetic cell 10 is more than the default charge value Q1 and the low pressure storage battery 20 sends and needs to charge Low pressure charging signals S when, the battery management system 70 also controls the heater 50 to carry out the electrokinetic cell 10 Heating;
When the electrokinetic cell 10 temperature between the first preset value T1 and the 3rd preset value T3, it is described When the electricity Q of electrokinetic cell 10 is less than the default charge value Q1, the battery management system 70 also controls the heater 50 pairs of electrokinetic cells 10 heat;
When the electrokinetic cell 10 temperature between the first preset value T1 and the 3rd preset value T3, it is described The electricity Q of electrokinetic cell 10 is more than the default charge value Q1 and the low pressure storage battery 20 does not send the low pressure for needing to charge During charging signals S, the battery management system 70 also controls the heater 50 to heat the electrokinetic cell 10.
T1=-30 DEG C of setting, T3=0 DEG C, T2=50 DEG C, Q1 is equal to the 15% of the specified electric quantity of electrokinetic cell, lifts below Go out example to be illustrated.
Example one:T=-18 DEG C, Q is equal to the 25% of the specified electric quantity of electrokinetic cell, and low pressure storage battery 20 needs to charge. Now, low pressure storage battery 20 will send low pressure charging signals S to battery management system 70.This situation meets above-mentioned " T1 < T < T3, Q > Q1, and battery management system 70 receives low pressure charging signals S " condition, then battery management system 70 controls always just Contactor K3, always negative contactor K2 is closed to connect the charging circuit of low pressure storage battery 20, and electrokinetic cell 10 passes through DC/DC Converter 40 is switched to low pressure storage battery 20, and low pressure storage battery 20 is charged by electrokinetic cell 10;Battery management system 70 simultaneously Control charging contactor K1, also contacts device K4 are closed to connect the heater circuit of electrokinetic cell 10, Vehicular charger 30 Heater 50 is switched to, electrokinetic cell 10 is heated by heater 50.Now, contactor K5 is cooled down to disconnect shape State.
Example two:T=-20 DEG C, Q is equal to the 10% of the specified electric quantity of electrokinetic cell.This situation meets above-mentioned " T1 < T < T3, Q < Q1 " condition, then battery management system 70 controls charging contactor K1, always negative contactor K2, also contacts device K4 are same When closure to be also turned on the charging circuit of electrokinetic cell 10 and heating circuit, one side Vehicular charger 30 is switched to power electric Pond 10, electrokinetic cell 10 being charged by Vehicular charger 30, another aspect Vehicular charger 30 is switched to heater 50, Electrokinetic cell 10 is heated by heater 50.Now, total positive contactor K3, cooling contactor K5 are off-state.
Example three:T=28 DEG C, Q is equal to the 30% of the specified electric quantity of electrokinetic cell, and low pressure storage battery 20 needs to charge.This When, low pressure storage battery 20 will send low pressure charging signals S to battery management system 70.This situation meets above-mentioned " T3 < T < T2, Q > Q1, and battery management system 70 receives low pressure charging signals S " condition, then battery management system 70 controls total positive contact Device K3, always negative contactor K2 is closed to connect the charging circuit of low pressure storage battery 20, and electrokinetic cell 10 is changed by DC/DC Device 40 is switched to low pressure storage battery 20, and low pressure storage battery 20 is charged by electrokinetic cell 10.Now, charging contactor K1, heating Contactor K4, cooling contactor K5 are off-state.
Example four:T=38 DEG C, Q is equal to the 25% of the specified electric quantity of electrokinetic cell, and low pressure storage battery 20 need not charge. Now, battery management system 70 will not receive the low pressure charging signals S from low pressure storage battery 20.This situation meets above-mentioned " T3 < T < T2, Q > Q1, but battery management system 70 is not received by low pressure charging signals S " condition, then battery management system The control charging contactor of system 70 K1, always negative contactor K2 is closed to connect the charging circuit of electrokinetic cell 10, vehicle-mounted charge Machine 30 is switched to electrokinetic cell 10, and electrokinetic cell 10 is charged by Vehicular charger 30.Now, total positive contactor K3 plus Thermally contact device K4, cooling contactor K5 is off-state.
Fig. 2 is the flow chart of the battery charging control method of the electric automobile of better embodiment of the present invention.It refer to figure 2, include the step of the battery charging control method of the electric automobile of better embodiment of the present invention:
(1) the temperature T and electricity Q of electrokinetic cell are gathered;
(2) judge whether the temperature T of electrokinetic cell is less than or equal to the first preset value T1 (such as -30 DEG C), if it is, Electrokinetic cell 10 is heated;Otherwise, step (3) is performed;
(3) judge whether the temperature T of electrokinetic cell is less than or equal to the 3rd preset value T3 (such as 0 DEG C), wherein the 3rd is pre- If value T3 is more than the first preset value T1;If it is, perform step (3.1);Otherwise, step (4) is performed;
(3.1) judge whether the electricity of electrokinetic cell 10 is more than or equal to preset value Q1 (such as the specified electricity of electrokinetic cell Amount 15%), if it is, perform step (3.1.1);Otherwise, electrokinetic cell 10 is heated and charged simultaneously;
(3.1.1) judges whether low pressure storage battery 20 sends low pressure charging signals S, if it is, entering to low pressure storage battery 20 Row charging, and electrokinetic cell 10 is heated simultaneously;Otherwise, electrokinetic cell 10 is heated and charged simultaneously;
(4) judge whether the temperature T of electrokinetic cell is less than or equal to the second preset value T2 (such as 50 DEG C), wherein second is pre- If value T2 is more than the 3rd preset value T3;If it is, perform step (5);Otherwise, electrokinetic cell 10 is cooled down;
(5) judge whether the electricity of electrokinetic cell 10 is more than or equal to preset value Q1 (such as specified electric quantities of electrokinetic cell 15%), if it is, perform step (6);Otherwise, electrokinetic cell 10 is charged;
(6) judge whether low pressure storage battery 20 sends low pressure charging signals, if it is, being filled to low pressure storage battery 20 Electricity;Otherwise, electrokinetic cell 10 is charged.
For the further detail below of step (1) to (6), it is referred in above-described embodiment on battery charging controller Associated description, will not be described here.
It is to be appreciated that the step of battery charging control method of above-mentioned electric automobile, can also be described as:
The low pressure whether the temperature T and electricity Q and low pressure storage battery 20 of collection electrokinetic cell 10 need to charge, which charges, to be believed Number S;
When the temperature of electrokinetic cell 10 is less than the first preset value T1, control heater 50 adds to electrokinetic cell 10 Heat;
When the temperature of electrokinetic cell 10 is higher than the second preset value T2, control cooling device 60 carries out cold to electrokinetic cell 10 But, wherein the second preset value T2 is more than the first preset value T1;
The temperature of electrokinetic cell 10 is between the first preset value T1 and the second preset value T2, the electricity Q of electrokinetic cell 10 When charge value Q1 default more than one and low pressure storage battery 20 send the low pressure charging signals S for needing to charge, electrokinetic cell is controlled 10 are charged by DC/DC converters 40 to low pressure storage battery 20;
The temperature of electrokinetic cell 10 between the first preset value T1 and the second preset value T2 and electrokinetic cell 10 electricity When Q is less than default charge value Q1, control Vehicular charger 30 charges to electrokinetic cell 10;
The temperature of electrokinetic cell 10 is between the first preset value T1 and the second preset value T2, the electricity Q of electrokinetic cell 10 When not sending the low pressure charging signals S for needing to charge more than default charge value Q1 and low pressure storage battery 20, Vehicular charger is controlled 30 pairs of electrokinetic cells 10 charge.
Further, when the temperature of the electrokinetic cell 10 is between the first preset value T1 and the 3rd preset value T3 Between, the electricity Q of the electrokinetic cell 10 is when being more than the default charge value Q1 and receiving low pressure charging signals S, in addition to Control heater 50 heats to the electrokinetic cell 10;
When the electrokinetic cell 10 temperature between the first preset value T1 and the 3rd preset value T3, it is described When the electricity Q of electrokinetic cell 10 is less than the default charge value Q1, in addition to control heater 50 is to the electrokinetic cell 10 Heated;
When the electrokinetic cell 10 temperature between the first preset value T1 and the 3rd preset value T3, it is described The electricity Q of electrokinetic cell 10 is more than the default charge value Q1 and the low pressure storage battery 20 does not send the low pressure for needing to charge During charging signals S, in addition to control heater 50 heats to the electrokinetic cell 10.
The battery charging controller and method of the electric automobile of the present invention, joined by the temperature of 70 collection electrokinetic cells 10 Number T, electrical parameter Q and low pressure storage battery 20 low pressure charging signals S, Treatment Analysis, root are carried out to these parameters and signal Following different processing mode is made according to different analysis results:(1) electrokinetic cell 10 is heated;(2) to low pressure storing up electricity Charged and electrokinetic cell 10 is heated simultaneously in pond 20;(3) electrokinetic cell 10 is heated and charged simultaneously;(4) Low pressure storage battery 20 is charged;(5) electrokinetic cell 10 is charged;(6) electrokinetic cell 10 is cooled down.
Influenceing for the environment temperature that electrokinetic cell 10 is subject to, this hair can be learnt by the temperature parameter T of electrokinetic cell 10 The bright influence that environment temperature has been taken into full account in charging and has been charged to electrokinetic cell 10.When environment temperature is too low, filled by heating 50 pairs of electrokinetic cells 10 are put to heat;When environment temperature is too high, electrokinetic cell 10 is cooled down by cooling device 60.Such as This, can be such that electrokinetic cell 10 is in an environment temperature that can be charged normal, so as to avoid in charging process, power The phenomenon that battery 10 is influenceed and occurred to charge by environment temperature.
Low pressure storage battery 20 is that battery management system 70 provides power supply, and battery management system 70 controls electrokinetic cell 10 Charging, therefore when the electricity of low pressure storage battery 20 is low to when can not maintain 70 normal work of battery management system, electrokinetic cell 10 Just can not charge or charge interruption.And the present invention fully takes into account what low pressure storage battery 20 charged to electrokinetic cell 10 in charging Influence, when low pressure storage battery 20 power shortage occurs and needs the electricity of charging and electrokinetic cell 10 to be more than preset value Q1, by power Battery 10 charges to low pressure storage battery 20, can avoid because of the low battery of low pressure storage battery 20 and caused by battery management system 70 can not work, the interruption so that electrokinetic cell can not charge or charge, so as to avoid being charged in electrokinetic cell 10 (fast charge, Trickle charge) during, low pressure storage battery 20 is possible to the electric deficiency phenomenon occurred.
Therefore, the battery charging controller and method of electric automobile of the invention, the ring of electrokinetic cell 10 is considered The electricity factor of border temperature and low pressure storage battery 20, heater 50 is first passed through when environment temperature is relatively low electrokinetic cell 10 is entered Row heating, is then charged, and changed simultaneously when power shortage occurs in low pressure storage battery 20 by electrokinetic cell 10 by DC/DC again Device 40 charges to low pressure storage battery 20, can make the charging environment more safety and stability of electrokinetic cell 10.
It is described above, only it is embodiments of the invention, any formal limitation not is made to the present invention, although this Invention is disclosed above with embodiment, but is not limited to the present invention, any person skilled in the art, is not taking off In the range of technical solution of the present invention, when the technology contents using the disclosure above make a little change or are modified to equivalent variations Equivalent embodiment, as long as being without departing from technical solution of the present invention content, the technical spirit according to the present invention is to above example Any simple modification, equivalent change and modification made, in the range of still falling within technical solution of the present invention.
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CN104022548A (en) * | 2014-06-05 | 2014-09-03 | 深圳市沃特玛电池有限公司 | Movable charging vehicle |
CN104242389B (en) * | 2014-09-01 | 2017-02-01 | 广东欧珀移动通信有限公司 | Charging circuit, battery core and mobile terminal |
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