CN102055042A - Battery heating control system for vehicles and control method thereof - Google Patents
Battery heating control system for vehicles and control method thereof Download PDFInfo
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- CN102055042A CN102055042A CN2009101099668A CN200910109966A CN102055042A CN 102055042 A CN102055042 A CN 102055042A CN 2009101099668 A CN2009101099668 A CN 2009101099668A CN 200910109966 A CN200910109966 A CN 200910109966A CN 102055042 A CN102055042 A CN 102055042A
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Abstract
The invention provides a battery heating control system for vehicles and a control method thereof. The battery heating control system comprises a heating control module and a battery heating unit; the heating control module is electrically connected with the battery heating unit; the battery heating unit is used for heating a battery; the heating control module is used for starting the heating of the battery by the battery heating unit when the condition of heating starting is met and stopping the heating of the battery by the battery heating unit when the condition of heating stop is met, wherein the starting of the battery heating unit meets the following conditions simultaneously that: the ambient temperature K ambient of the system reaches a temperature set value K1; the battery temperature K battery reaches a temperature set value K2; and the battery state of charge (SOC) reaches a set value SOC1 of the battery SOC. The battery heating control system for the vehicles and the control method can better protect the battery.
Description
Technical field
The invention belongs to field of batteries, relate in particular to a kind of vehicle battery heating control system and control method thereof the vehicle power supply.
Background technology
At present, the energy source of hybrid vehicle and electric motor car mainly is the power battery pack on the car, and what power battery pack generally adopted is lithium battery, and lithium battery has become portable electric appts and the employed ideal source of electric motor car.Consider that automobile need travel under the road conditions of complexity and environmental condition, perhaps some electronic equipment need use in relatively poor environmental condition, so the battery as electric motor car or electronic equipment power source just needs to adapt to these complicated situations, especially when electric motor car or electronic equipment are in the low temperature environment, more need battery to have excellent low temperature charge-discharge performance and higher output, input power performance.Battery is in low temperature environment following time, and the activity of battery reduces, can't operate as normal.At present usually way is to utilize the electrochemical reaction of these inside batteries to improve the battery cryogenic property or at outside batteries heater is set to improve cell integrated temperature and battery is worked under suitable temperature.
Just the mode of heater is set at outside batteries, existing scheme is to start or stop heating to battery by the temperature that detects battery mostly, in general, when temperature is lower than a certain predetermined temperature, begin battery is heated, and when temperature reaches another predetermined temperature, stop battery being heated.
For example, a kind of battery temp control system in having now applies in the portable electron device, and this system comprises: a temperature sensing unit is arranged within the power brick, in order to continue an internal temperature of this power brick of sensing; One temperature control unit is arranged in this portable electron device, in order to setting a low-temperature heat temperature, and receives this internal temperature, when confirming this internal temperature less than this low-temperature heat temperature, produces a low-temperature heat signal; And a heat energy generation unit, be arranged within this power brick, in order to receiving this low-temperature heat signal, and produce a heat energy to this power brick.
Existing battery heating control system all is by set up the temperature that a heater improves battery pack in the battery pack outside, start or stop heating by the temperature that detects battery to battery, in general, when the temperature of battery is lower than a certain predetermined temperature, begin battery is heated, and when temperature reaches another predetermined temperature, stop battery being heated.Because the temperature of battery is that collector extends to other positions internally; temperature is difficult to tend to be steady at short notice; thisly only utilize single battery temperature condition to control when to start and stop heating extremely not corresponding to actual needs, for practice, can not well protect battery.
Summary of the invention
The present invention provides a kind of vehicle battery heating control system and the control method thereof that can better protect battery for solving the problem that the battery heating control system that exists in the prior art and method for heating and controlling can not be protected battery better.
The invention provides a kind of vehicle battery heating control system, comprise heating control module and battery heating unit; Described heating control module is electrically connected with described battery heating unit;
Described battery heating unit is used for battery is heated,
Described heating control module is used for when meeting the condition that starts heating, starts the heating of battery heating unit to battery, and when meeting the condition that stops to heat, stops the heating of battery heating unit to battery;
Wherein, described startup battery heating meets the following conditions simultaneously:
The ambient temperature K of system
RingReach desired temperature K1;
Battery temperature K
Reach desired temperature K2;
Battery charge attitude SOC reaches battery charge attitude set point SOC1.
The present invention also provides a kind of vehicle battery method for heating and controlling, and this method may further comprise the steps: when meeting the condition that starts heating, start the heating to battery; And
When meeting the condition that stops to heat, stop heating to battery;
Wherein, described startup battery heating meets the following conditions simultaneously:
The ambient temperature K of system
RingReach desired temperature K1;
Battery temperature K
Reach desired temperature K2;
Battery charge attitude SOC reaches battery charge attitude set point SOC1.
This method and apparatus that is used to control the battery heating provided by the invention improves the condition that starts heating, starts heating, the more diversification of the factor of consideration than the single battery temperature judgment mode of available technology adopting.Just can start under the condition owing to the ambient temperature, battery temperature and the battery capacity that satisfy system works at the same time battery is heated, the battery that is in the low temperature environment is heated up effectively, can keep simultaneously the whole system can be again by false triggering, guaranteed the charge-discharge performance of battery, and can not cause damage to battery, prolong the life-span of battery, reduced the power consumption of system.
Description of drawings
Fig. 1 is the structured flowchart of vehicle battery heating control system of the present invention;
Fig. 2 is the flow chart of vehicle battery method for heating and controlling of the present invention;
Fig. 3 is the circuit diagram of ambient temperature comparing unit of the present invention.
Embodiment
In order to make technical problem solved by the invention, technical scheme and beneficial effect clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
As shown in Figure 1, the invention provides a kind of vehicle battery heating control system, comprise heating control module 1 and battery heating unit 2; Described heating control module 1 is electrically connected with described battery heating unit 2;
Described battery heating unit 2 is used for battery is heated,
Described heating control module 1 is used for starting the heating of 2 pairs of batteries of battery heating unit, and when meeting the condition that stops to heat, stopping the heating of 2 pairs of batteries of battery heating unit when meeting the condition that starts heating;
Wherein, described startup battery heating meets the following conditions simultaneously:
The ambient temperature K of system
RingReach desired temperature K1;
Battery temperature K
Reach desired temperature K2;
Battery charge attitude SOC (state of charge) reaches battery charge attitude set point SOC1.
As further improvement, described heating control system also comprises the ambient temperature comparing unit 3 that is electrically connected with described heating control module 1;
Described ambient temperature comparing unit 3 is used for the ambient temperature of detection system and more detected ambient temperature K
RingWith the size of desired temperature K1, and send comparison signal to described heating control module 1;
Described heating control module 1 is according to himself powering on or cut off the power supply of the comparison signal of described ambient temperature comparing unit 3 control.
Only under the situation that heating control module 1 powers on, the unit of heating control module 1 inside could normally move, and could control 2 pairs of batteries of battery heating unit according to corresponding condition and heat.
Wherein, Fig. 3 is the circuit diagram of a kind of embodiment ambient temperature comparing unit 3 among the present invention, described ambient temperature comparing unit 3 comprises comparator U19A, the in-phase input end of comparator U19A is connected with an end of resistance R 69 and resistance R 68 respectively, the other end of resistance R 69 is connected with the 12V power supply, the other end of resistance R 68 is connected with ground respectively with comparator U19A power cathode, resistance R 69 equates reference resistance as a comparison with the resistance of resistance R 68, the inverting input of comparator U19A is connected with the end of constant temperature resistance R 77 and thermistor R76 respectively, the other end of constant temperature resistance R 77 is connected with the 12V power supply respectively with comparator U19A positive source, the other end of thermistor R76 is connected with ground, level signal of output output of comparator U19A is as the signal that powers on or cut off the power supply that drives heating control module 1.
The operation principle of described ambient temperature comparing unit 3 is as follows: after system powered on, the reference voltage of ambient temperature monitoring unit was cathode voltage U19A+, and the comparative voltage of ambient temperature monitoring unit is cathode voltage U19A-.When ambient temperature equals desired temperature K1, the resistance of constant temperature resistance R 77 equates with the resistance of thermistor R76, (U19A+)=(U19A-), comparator U19A output low level signal, i.e. output power supply allows signal T-OFF to give heating control module 1, thermal control module 1 powers on, and system enters mode of operation.When ambient temperature during greater than desired temperature K1, (U19A+)＞(U19A-), U19A exports high level, i.e. output power supply non-permission signal T-OFF give heating control module 1, makes thermal control module 1 outage, and system enters park mode.When ambient temperature is lower than desired temperature K1, (U19A+)＜(U19A-), comparator U19A output low level signal, i.e. output power supply allows signal T-OFF to give heating control module 1, and thermal control module 1 is powered on, and system enters mode of operation.By ambient temperature comparing unit 3 assurance systems when ambient temperature is higher than desired temperature K1, heating control module 1 is de-energized, can do not made 2 work of battery heating unit by false triggering, reduce the power consumption of system simultaneously, can when ambient temperature is high, battery not heated so that battery is damaged yet.
As further improvement, described heating control system also comprises first timing unit 4 that is used for system operation time is carried out timing, and described first timing unit 4 is electrically connected with described heating control module 1.When heating control module 1 starts, first timing unit 4 is started working, system operation time is carried out timing to be made and is no more than certain value T1 the maximum running time of system, the heating signal that sends continuous and effective in case locking system operation enters endless loop when disorderly is to battery heating unit 2, when the timing time of first timing unit 4 reaches certain value T1, can make heating control module 1 outage, system enters park mode.
As further improvement, described heating control module 1 comprises control unit 11 and battery temperature and battery capacity detecting unit 12; Described control unit 11 is electrically connected with described battery heating unit 2;
The detecting unit 12 of described battery temperature and battery capacity is used to detect the capacity of the temperature of battery and battery and gives control unit 11;
Described control unit 11 is used for comparing 2 pairs of start battery heating of control battery heating unit or stopping heating according to the information of detecting unit 12.
Wherein, described battery heating unit 2 can for any can be to the device of battery heating, for example comparatively conventional electric calorifie installation (as heating wire etc.), but the common structure of this electric calorifie installation is comparatively complicated and take up room bigger, so can cause the volume of entire cell assembly to become big, need electronic installation or electronic equipment to have the bigger space that holds battery.
In order to address this problem, the battery heating unit 2 preferred pulse generators and the switch module that is connected with pulse generator of adopting of the present invention, this module can be connected with the both positive and negative polarity of battery, when this switch module conducting, can make battery short circuit, when this switch module disconnects, can make battery open a way.In fact, this switch module itself does not have the battery heating function, but can make the battery instantaneous short circuit by the short time conducting of self, produces big electric current, thereby reaches the effect that battery is heated up.With respect to electric calorifie installation, the structure of switch module is comparatively simple, and volume is less, more is applicable in the electronic installation or electronic equipment that the space is limited.
Described switch module can be selected various switching circuits for use, as triode, metal-oxide-semiconductor or the like, as long as can be by making battery with the impulse form short circuit battery be heated up and not damaging battery and battery performance.
Under the preferable case, described switch module is insulated gate bipolar transistor (IGBT) module, the IGBT module is to well known to a person skilled in the art electronic component, the IGBT module has grid, source electrode and drain electrode, grid (being control end) is used for pulse generator, source electrode is used to connect the negative or positive electrode of battery, and drain electrode is used for correspondingly connecting the negative pole or the positive pole (connection anodal, negative pole depends on that the type of IGBT pipe still is the N type for the P type, for well known in the art) of battery.The advantage of IGBT module power field effect pipe that has been compound and electron transistor and a kind of multiple device of obtaining have that input impedance height, operating rate are fast, Heat stability is good, drive circuit is simple, on state voltage is low, proof voltage is high and bear advantages such as electric current is big.Under the preferable case, switch module can comprise the IGBT module of a plurality of parallel connections, and wherein conductings just can make battery short circuit.
Those skilled in the art can select to have the suitable proof voltage value or the IGBT module of anti-current value according to the different model and the design capacity of battery.Under the preferable case, select for use the proof voltage value to be generally the above IGBT module of 1000V, more preferably 1200V usually.Under the preferable case, when the design capacity of described battery is 100Ah when following, selecting anti-current value for use is the IGBT module of 3000-5000A; When the design capacity of described battery is 100Ah when above, selecting anti-current value for use is the IGBT module of 5000-10000A.
In the present invention, pulse generator is brought in the startup of control switch module according to the control signal production burst sequence of control unit 11 and the control that outputs to switch module and is stopped.Equally, battery is caused unnecessary harm, need certain restriction be arranged the conducting of switch module and the time of disconnection for fear of long-time short circuit.Under the preferable case, the pulsewidth of the pulse train that pulse generator generates is generally 1-3ms, is preferably 1-2ms, and duty ratio is 5-30%, is preferably 5-10%, and the duration is a 30-maximum heating time T
2max, be preferably 60-360s.
As further improvement, described heating control module 1 also comprises second timing unit 13 that is used for battery is carried out heating time timing, and described second timing unit 13 is electrically connected with described control unit 11.When the timing time of second timing unit 13 surpassed T2, control unit 11 control battery heating units 2 stopped heating.
As further improvement, described control unit 11 is the LPC2194 single-chip microcomputer.
The present invention also provides a kind of vehicle battery method for heating and controlling, and this method may further comprise the steps: when meeting the condition that starts heating, start the heating to battery; And when meeting the condition that stops to heat, stop heating to battery;
Wherein, described startup battery heating meets the following conditions simultaneously:
The ambient temperature K of system
RingReach desired temperature K1;
Battery temperature K
Reach desired temperature K2;
Battery charge attitude SOC reaches battery charge attitude set point SOC1.
As described in Figure 2, a kind of vehicle battery method for heating and controlling in the embodiments of the invention may further comprise the steps:
Step S01, ambient temperature comparing unit 3 detects the ambient temperature of current system, relatively this temperature K
RingWhether less than desired temperature K1, if then enter step S03, if judged result then enters step S02 for not;
Step S02, heating control module 1 outage, EP (end of program);
Step S03, heating control module 1 powers on, and system enters step S04;
Step S04, first timing unit 4 picks up counting, and system enters step S05;
Step S05, system operation time T
SystemWhether greater than time set value T1, if, then enter step S02, if judged result for not, then system enters step S06;
Step S06, relatively battery temperature K
Whether less than desired temperature K2 and battery charge attitude SOC greater than battery charge attitude set point SOC1, if, then enter step S07, if not, then system enters step S02;
Step S07, control unit control battery heating unit heats battery, and second timing unit 13 picks up counting simultaneously, and system enters step S08;
Step S08, battery T heating time
Whether greater than time set value T2, if, then enter step S09, if judged result for not, then system enters step S07, continues timing;
Step S09, control unit 11 control battery heating units 2 stop battery being heated, and system enters step S02, EP (end of program).
In step S01, the span of described desired temperature K1 is :-10 ℃ to 10 ℃.
For step S05 and step S08, the span of the set point T1 of system operation time is: T2＜T1＜300s, the heating time of 2 pairs of batteries of heating control module 1 control battery heating unit is satisfied in assurance, overrun when preventing simultaneously that heating control module 1 from entering endless loop, the span of the set point T2 of battery heating time is: 10s is to 240s.
In step S06, the span of described desired temperature K2 is :-20 ℃ to 0 ℃.The ratio of the electric weight when described battery charge attitude SOC is meant the actual electric weight of battery and is full of electricity is a percentage, is that the method by various routines is estimated in the actual motion.When battery charge attitude SOC crosses when low, system's control battery short circuit heating is bigger to the influence in useful life of battery, and therefore the span of described battery charge attitude set point SOC1 is: 30% to 50%.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (15)
1. a vehicle battery heating control system is characterized in that: comprise heating control module and battery heating unit; Described heating control module is electrically connected with described battery heating unit;
Described battery heating unit is used for battery is heated,
Described heating control module is used for when meeting the condition that starts heating, starts the heating of battery heating unit to battery, and when meeting the condition that stops to heat, stops the heating of battery heating unit to battery;
Wherein, described startup battery heating meets the following conditions simultaneously:
The ambient temperature K of system
RingReach desired temperature K1;
Battery temperature K
Reach desired temperature K2;
Battery charge attitude SOC reaches battery charge attitude set point SOC1.
2. vehicle battery heating control system as claimed in claim 1 is characterized in that: described heating control system also comprises the ambient temperature comparing unit that is electrically connected with described heating control module;
Described ambient temperature comparing unit is used for the ambient temperature of detection system, and the size of more detected ambient temperature and desired temperature K1, and sends comparison signal to described heating control module;
Described heating control module, powering on or cut off the power supply according to himself module of the comparison signal of described ambient temperature unit control.
3. vehicle battery heating control system as claimed in claim 2 is characterized in that: described heating control system also comprises first timing unit that is used for system operation time is carried out timing, and described first timing unit is electrically connected with described heating control module.
4. vehicle battery heating control system as claimed in claim 3 is characterized in that: described heating control module comprises the detecting unit of control unit and battery temperature and battery capacity; Described control unit is electrically connected with described battery heating unit, described ambient temperature comparing unit and described first timing unit respectively;
The detecting unit of described battery temperature and battery capacity is used to detect the capacity of the temperature of battery and battery and gives described control unit;
Described control unit is used for information according to detecting unit and compares the described battery heating unit of control to the start battery heating or stop heating.
5. vehicle battery heating control system as claimed in claim 4 is characterized in that: described heating control module also comprises second timing unit that is used for battery is carried out heating time timing, and described second timing unit is electrically connected with described control unit.
6. vehicle battery heating control system as claimed in claim 4 is characterized in that: described control unit is the LPC2194 single-chip microcomputer.
7. vehicle battery heating control system as claimed in claim 1 is characterized in that: the span of described desired temperature K1 is :-10 ℃ to 10 ℃.
8. vehicle battery heating control system as claimed in claim 1 is characterized in that: the span of described desired temperature K2 is :-20 ℃ to 0 ℃.
9. vehicle battery heating control system as claimed in claim 1 is characterized in that: the span of described battery charge attitude set point SOC1 is: 30% to 50%.
10. vehicle battery method for heating and controlling, it is characterized in that: this method may further comprise the steps: when meeting the condition that starts heating, start the heating to battery; And when meeting the condition that stops to heat, stop heating to battery;
Wherein, described startup battery heating meets the following conditions simultaneously:
The ambient temperature K of system
RingReach desired temperature K1;
Battery temperature K
Reach desired temperature K2;
Battery charge attitude SOC reaches battery charge attitude set point SOC1.
11. vehicle battery method for heating and controlling as claimed in claim 10 is characterized in that: further comprising the steps of: described startup battery heating also needs to meet the following conditions:
System operation time T
SystemLess than time set value T1.
12. vehicle battery method for heating and controlling as claimed in claim 11 is characterized in that: this method is further comprising the steps of:
Step S01, described ambient temperature comparing unit detects the ambient temperature of current system, relatively this temperature K
RingWhether less than desired temperature K1, if then enter step S03, if judged result then enters step S02 for not;
Step S02, described control heating module outage, EP (end of program);
Step S03, described control heating module powers on, and system enters step S04;
Step S04, described first timing unit picks up counting, and system enters step S05;
Step S05, system operation time T
SystemWhether greater than time set value T1, if, then enter step S02, if judged result for not, then system enters step S06;
Step S06, relatively battery temperature K
Whether less than desired temperature K2 and battery charge attitude SOC greater than battery charge attitude set point SOC1, if, then enter step S07, if not, then system enters step S02;
Step S07, described control unit control described battery heating unit battery are heated, and described second timing unit picks up counting simultaneously, and system enters step S08;
Step S08, described control unit judge whether to stop heating, if then enter step S09, if judged result is that then system does not enter step S07;
Step S09, described control unit control described battery heating unit and stop battery being heated, and system enters step S02, EP (end of program).
13. vehicle battery method for heating and controlling as claimed in claim 10 is characterized in that: the span of described desired temperature K1 is :-10 ℃ to 10 ℃.
14. vehicle battery method for heating and controlling as claimed in claim 10 is characterized in that: the span of described desired temperature K2 is :-20 ℃ to 0 ℃.
15. vehicle battery method for heating and controlling as claimed in claim 10 is characterized in that: the span of described battery charge attitude set point SOC1 is: 30% to 50%.
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