CN103545574B - A kind of method for controlling heating of battery and device - Google Patents

A kind of method for controlling heating of battery and device Download PDF

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Publication number
CN103545574B
CN103545574B CN201210246346.0A CN201210246346A CN103545574B CN 103545574 B CN103545574 B CN 103545574B CN 201210246346 A CN201210246346 A CN 201210246346A CN 103545574 B CN103545574 B CN 103545574B
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heating
battery
time
set point
unit
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CN103545574A (en
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刘进
贾晓辉
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BYD Co Ltd
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BYD Co Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/63—Control systems
    • H01M10/633—Control systems characterised by algorithms, flow charts, software details or the like
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/615—Heating or keeping warm
    • 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

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Secondary Cells (AREA)
  • Automation & Control Theory (AREA)

Abstract

The invention provides a kind of method for controlling heating of battery, comprising the following steps: when meeting the condition starting heating, starting the heating to battery; And when meeting the condition stopping heating, stop the heating to battery.Wherein, while starting heating, to timing heating time T6, when T6 reaches setting time out Tm, suspend heating; When T6 reaches setting time started Tn, restart heating, and clearing process is done to T6; Repeat above-mentioned circulation, until meet the condition stopping heating, stop heating.Meanwhile, present invention also offers a kind of device for controlling heating of battery, comprising heating of battery unit, control unit and the second timing unit.Use method for heating and controlling provided by the invention, the segmentation that can realize heating of battery is carried out, and makes thermal diffusion more even, thus extends the life of a cell.

Description

A kind of method for controlling heating of battery and device
Technical field
The invention belongs to heating of battery field, particularly relating to a kind of method for controlling heating of battery and device.
Background technology
At present, lithium battery has become the ideal source that portable electric appts and electric motor car use.Consider that automobile needs to travel under the road conditions and environmental condition of complexity, or some electronic equipment needs to use in poor environmental condition, so just need as the battery of electric motor car or electronic equipment power source the situation adapting to these complexity, especially, when electric motor car or electronic equipment are in low temperature environment, battery is more needed to have excellent low temperature charge-discharge performance and higher output, input power performance.
In order to improve the serviceability of battery, at low ambient temperatures, we, when using battery, will heat it usually, to reach good charge-discharge performance and higher output, input power performance.
Traditional heating means, arrange heater at outside batteries; The program is the heating that the temperature by detecting battery starts or stops to battery mostly.This heating means, can not be applicable to all situations, and start, terminate, with reference to single, easily to go wrong.
In order to solve the problem, disclose a kind of method for heating and controlling in CN200910147356.7, its stop condition is more polynary than traditional heating means, simultaneously by detect SOC value and electric current, heating time etc. data, then complete the heating of battery.
But existing control method is after starting heating, continually disposablely complete heating, until stop heating condition meeting.Power brick is made up of multiple battery series-parallel connection, battery junction resistance may have larger difference, and inside battery resistance also possibility skewness, in such heating process, may be there is the larger temperature difference in inside battery and junction, cause local overheating, go down for a long time, can battery life be damaged, cause potential safety hazard.
Summary of the invention
The present invention, for solving the disposable heating of battery process that completes, causing battery local temperature too high, affect the technical problem of battery life, providing a kind of discontinuity to carry out the method and apparatus for controlling heating of battery of circulating battery heating.
A kind of method for controlling heating of battery provided by the invention, comprises the following steps: when meeting the condition starting heating, start the heating to battery; And when meeting the condition stopping heating, stop the heating to battery.
Wherein, while starting heating, timing is carried out to T6 heating time, when T6 reaches time out set point Tm, suspend heating; When T6 reaches time started set point Tn, restart heating, and clearing process is done to T6; Repeat above-mentioned circulation, until meet the condition stopping heating, stop heating.
Meanwhile, present invention also offers a kind of device for controlling heating of battery, this device comprises: heating of battery unit, for heating battery;
Second timing unit, for detecting T6 heating time of battery and T6 heating time detected being outputted to control unit;
Control unit, for when meeting the condition starting heating, starting heating of battery unit and heating battery, and when meeting the condition stopping heating, stop heating of battery unit to the heating of battery, described control unit comprises the second time judgment module and control module, wherein:
T6 and time out set point Tm heating time, time started set point Tn that described second time judgment module is used for the second timing unit to detect compare, and comparative result are sent to control module;
Described control module, when T6 heating time for detecting at the second timing unit reaching time out set point Tm, controlling heating of battery unit time-out and heating battery; Further, when T6 heating time that the second timing unit detects reaches time started set point Tn, control heating of battery unit and restart to heat battery, and clearing process is carried out to T6;
Described control module constantly repeats above-mentioned circulation, until when other signals received meet the condition stopping heating, controls heating of battery unit and stops heating battery.
This method and apparatus for controlling heating of battery provided by the invention, heating process after starting heating is designed and improved, relative to prior art, method for heating and controlling provided by the invention, heating completes with the form of segmentation, there is certain off time between every section, thermal diffusion can be made more even, thus extend the life of a cell.
Accompanying drawing explanation
Fig. 1 is the heating of battery control method flow chart that the embodiment of the present invention provides.
Fig. 2 is the apparatus structure schematic diagram for controlling heating of battery that the embodiment of the present invention provides.
Embodiment
In order to make technical problem solved by the invention, technical scheme and beneficial effect clearly understand, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
First, in the present invention, so-called " battery " had both comprised single battery monomer, also comprised the battery pack be made up of multiple battery cell.Therefore, the various descriptions for " battery " be both applicable to single battery monomer, were also applicable to battery pack.Such as, for single battery monomer, so-called " internal resistance of cell R " just refers to that the internal resistance of this battery cell is R; And for battery pack, so-called " internal resistance of cell R " then refers to that the internal resistance of this battery pack is R.
As previously mentioned, disposablely completing heating of battery process for solving, battery local temperature can be caused too high, affect the technical problem of battery life, embodiments providing a kind of method for controlling heating of battery, comprising the following steps:
When meeting the condition starting heating, start the heating to battery; And when meeting the condition stopping heating, stop the heating to battery.
Wherein, while starting heating, timing is carried out to T6 heating time, when T6 reaches time out set point Tm, suspend heating; When T6 reaches time started set point Tn, restart heating, and clearing process is done to T6; Repeat above-mentioned circulation, until meet the condition stopping heating, stop heating.
The embodiment of the present invention additionally provides a kind of device for controlling heating of battery, and this device comprises:
Heating of battery unit 1, for heating battery;
Second timing unit 8, for detecting T6 heating time of battery and T6 heating time detected being outputted to control unit 2;
Control unit 2, for when meeting the condition starting heating, starting heating of battery unit 1 pair of battery and heating, and when meeting the condition stopping heating, stop the heating of heating of battery unit 1 pair of battery, described control unit 2 comprises the second time judgment module and control module, wherein:
T6 and time out set point Tm heating time, time started set point Tn that described second time judgment module is used for the second timing unit 8 to detect compare, and comparative result are sent to control module;
Described control module, when T6 heating time for detecting at the second timing unit 8 reaches time out set point Tm, control heating of battery unit 1 suspends and heats battery; Further, when T6 heating time that the second timing unit 8 detects reaches time started set point Tn, control heating of battery unit 1 and restart to heat battery, and clearing process is carried out to T6;
Described control module constantly repeats above-mentioned circulation, until when other signals received meet the condition stopping heating, controls heating of battery unit 1 and stops heating battery.
The above-mentioned method and apparatus for controlling heating of battery, heating process after starting heating is designed and improved, relative to prior art, method for heating and controlling provided by the invention, heating completes with the form of segmentation, there is certain off time between every section, thermal diffusion can be made more even, thus extend the life of a cell.
In concrete enforcement, further optimal design can be made to such scheme, be described below by way of specific embodiment
Embodiment:
The present embodiment can be divided into three parts, starts heating part, heat stepwise cyclic part and stops heating part.Fig. 1 is the flow chart of the method for controlling heating of battery according to the embodiment of the present invention, as shown in Figure 1, in figure after " beginning ", before " starting the heating to battery ", is in the method the condition judgment part starting heating; After " starting the heating to battery ", before " stopping the heating to battery ", the flow process on both sides is the judgment part of stop condition, before middle circulation is stopping heating, and the circulation of heat stepwise process.
What the present embodiment provided is divided into two steps on the whole for the method controlling heating of battery: when meeting the condition starting heating, start the heating to battery; And when meeting the condition stopping heating, stop the heating to battery.
Start heating part.
In the present embodiment, to start the heating of battery, following two conditions must be possessed simultaneously:
1, the temperature K of battery is less than beginning desired temperature Kstart;
2, the electricity Q of battery is not less than heating electricity set point Qheat.
Meet above two conditions simultaneously, just start the heating to battery.
In ungratified situation, if do not satisfy condition 1, then do not start the heating to battery, and no longer determine whether eligible 2; When satisfy condition 1 but do not satisfy condition 2, low current charge can be carried out to battery, repeat to judge the magnitude relationship between electricity Q and heating electricity set point Qheat, until when the electricity Q of battery meets the condition of the heating starting battery, heating of battery starts simultaneously.
That is, do not satisfy condition 1, illustrate that battery self-temperature meets use standard, do not need heating; If satisfy condition 1, satisfy condition at the same time 2 condition under, start the heating to battery; If do not satisfy condition 2, first low current charge is carried out to battery, until battery electric quantity eligible 2, then start the heating to battery.
Traditional startup heating condition, only considers this condition of battery temperature K, and have ignored the consideration of battery electric quantity Q or directly select not heat when battery electric quantity Q is too low; Make, when battery electric quantity Q is too low, can not the heating of complete battery pair.The present invention has then taken into account the consideration to battery temperature K and battery electric quantity Q, when battery electric quantity Q is not enough, carries out low current charge, make battery when electricity deficiency own to battery, and the control of this control method of process also can realize the heating to battery.
Below, the parameter in the condition heated above-mentioned startup is described.
Above-mentioned beginning desired temperature Kstart is the maximum temperature starting heating of battery, that is, when the temperature K of the battery only detected is less than beginning desired temperature Kstart, just likely starts heating of battery; Wherein, the span starting desired temperature Kstart is-50 DEG C ~ 0 DEG C.According to the difference of battery, what start desired temperature Kstart chooses also difference, when using the method, first carries out starting choosing of desired temperature Kstart according to battery.
Pre-set according to actual needs during above-mentioned heating electricity set point Qheat, its effect is under the sufficiently high prerequisite of guarantee battery electric quantity Q, starts heating of battery; If battery electric quantity Q is too low, then can not heat, this is that system can carry out low current charge to battery, until battery electric quantity Q is greater than or equal to heating electricity set point Qheat.
First choose the beginning desired temperature Kstart of battery, its selection range can be-50 DEG C ~ 0 DEG C.Then heating of battery electricity setting Qheat value is chosen.
In above-mentioned startup heating part, need to detect the temperature K of battery and electricity Q, these can be detected by corresponding transducer.For the battery pack that multiple cell forms, utilize multiple temperature sensor to record the temperature of each cell, therefrom select minimum temperature to use as the temperature K of the battery detected.
In addition, for the mode of heating, various applicable mode of heating can being adopted, carrying out electric heating as utilized electric calorifie installation.In the present invention, preferably short-circuit the battery battery is heated up, this mode is not heat from outer bound pair battery, but the big current caused when utilizing battery short circuit makes battery oneself heat up.Battery short circuit can be realized (will be described in detail hereinafter) by connecting valve module (as IGBT module) between the both positive and negative polarity of battery, battery short circuit at short notice can be made by the conducting of switch module.
In order to avoid long-time short circuit causes unnecessary harm to battery, need there is certain restriction to the conducting of switch module and the time of disconnection.Conducting and the disconnection of above-mentioned switch module are triggered by pulse train, and under preferable case, the scope of the pulsewidth of above-mentioned pulse train is 1 ~ 3ms, and be preferably 1 ~ 2ms, duty ratio is 5 ~ 30%, is preferably 5 ~ 10%.
Heat stepwise cyclic part.
While startup heating, carry out timing 8 pairs of heating times by the second timing unit, be designated as T6; When T6 reaches time out set point Tm, suspend heating; At this moment, the second timing unit 8 continues timing, when T6 reaches time started set point Tn, restarts heating, and at this moment reset the time in the second timing unit 8, namely T6 resets, and repeats above-mentioned timing and circulation, until heating process terminates simultaneously.
In said process, Tm and Tn is the time point with definite value set, and Tm is heating time out point, and Tn is that heating restarts time point; When the timing T6 of the second timing unit 8 reaches time out set point Tm, heating suspends, when the timing T6 of the second timing unit 8 reaches time started set point Tn, restart heating, constantly repeat this process, the segmentation realizing heating process is carried out, and has certain off time like this between every section of heating, can thermal diffusion be made these off times evenly, thus to extend the life of a cell.
Tm, Tn, according to the difference of battery, need different set points, and this, in concrete use procedure, sets as required.The range of choices of Tm, Tn is 10s ~ 300s.
Stop heating part.
When internal resistance of cell R drops to the stopping internal resistance set point Rstop of battery or heating time, T7 reached maximum heating time set point Tmax, heating of battery stops.
Above-mentioned internal resistance of cell R is recorded by transducer, and heating time, T7 was recorded by the first timing unit 7.Wherein, internal resistance set point Rstop and maximum heating time set point Tmax is stopped all setting accordingly according to concrete cell condition.Wherein stop the span of internal resistance set point Rstop between 48 milliohm to 41 milliohms, the maximum heating time, set point Tmax was preferably 30s ~ 600s.
At low temperatures, internal resistance variation with temperature is very responsive for battery, and internal resistance is very little with the lifetime change of battery, so from the size of internal resistance, can judge the internal temperature of battery accurately.Relative to more existing bases for estimation, such as gather the external temperature of battery, be difficult to the object reaching real-time monitoring battery internal temperature.And start with from survey internal resistance, monitoring that can be real-time and obtain battery actual temperature more accurately.
In heating of battery process, judging whether this heating process meets stopping heating condition according to particular flow sheet as shown in Figure 1, just stopping the heating to battery immediately, in order to avoid the performance of infringement battery and life-span once meet wherein some conditions of heating that stops.Certainly, flow process given in Fig. 1 is not unique, and those of ordinary skill in the art also can according to the judgement flow process stopping the condition design of heating to go out other.
In the present embodiment, Kstart chooses-19.2 DEG C, and Tm chooses 60s, and Tn chooses 60s, and Tmax chooses 360s, and Rstop chooses 46 milliohms.
Below in conjunction with Fig. 2, the device for controlling heating of battery of the present invention is described.
As shown in Figure 2, the structural representation of the device for controlling heating of battery provided for the embodiment of the present invention.This device comprises:
Heating of battery unit 1, for heating battery;
Temperature detecting unit 3, for detecting the temperature K of battery and the temperature K detected being outputted to control unit 2;
Electric power detection unit 4, for detecting the electricity Q of battery and the electricity Q detected being outputted to control unit 2;
Charhing unit 5, during for being less than heating electricity set point Qheat as electricity Q, carries out low current charge to battery;
Internal resistance detection unit 6, for detecting the internal resistance R of battery and the internal resistance R detected being outputted to control unit 2;
First timing unit 7, for detecting the time T7 of heating of battery and T7 heating time detected being outputted to control unit 2;
Second timing unit 8, for detecting T6 heating time of battery and T6 heating time detected being outputted to control unit 2;
Control unit 2, for when meeting the condition starting heating, starting heating of battery unit 1 pair of battery and heating, and when meeting the condition stopping heating, stops heating of battery unit to the heating of battery.
Above-mentioned control unit 2 comprises temperature judge module, electricity judge module, internal resistance judge module, very first time judge module, the second time judgment module and control module, wherein:
Temperature judge module, compares with beginning desired temperature Kstart for the temperature K detected by temperature detecting unit 3, and comparative result is sent to control module.
Electricity judge module, compares with heating electricity set point Qheat for the electricity Q detected by electric power detection unit 4, and comparative result is sent to control module.
Internal resistance judge module, compares with stopping internal resistance set point Rstop for the internal resistance R detected by internal resistance detection unit 6, and comparative result is sent to control module.
Very first time judge module, compares for the T7 and maximum heating time set point Tmax heating time detected by the first timing unit 7, and comparative result is sent to control module.
Second time judgment module, compares for T6 and time out set point Tm heating time, the time started set point Tn detected by the second timing unit 8, and comparative result is sent to control module.
Above-mentioned control module, the temperature K detected at temperature detecting unit 3 is less than beginning desired temperature Kstart, and when the electricity Q that electric power detection unit 4 detects is not less than heating electricity set point Qheat, controls described heating of battery unit 1 pair of battery and heat; And when the electricity Q that electric power detection unit 4 detects is less than heating electricity set point Qheat, control charhing unit 5 pairs of batteries and carry out low current charge, until the electricity Q that control unit 2 receives meets the condition starting heating, charhing unit stops carrying out low current charge to battery.
The internal resistance R of above-mentioned control module also for detecting at internal resistance detection unit 6 drops to T7 heating time that the stopping internal resistance set point Rstop of battery or the first timing unit 7 detect when reaching maximum heating time set point Tmax, controls heating of battery unit 1 and stops heating battery.
Above-mentioned control module, when T6 heating time also for detecting at the second timing unit 8 reaches time out set point Tm, control heating of battery unit 1 suspends and heats battery; Further, when T6 heating time that the second timing unit 8 detects reaches time started set point Tn, control heating of battery unit and restart to heat battery, and clearing process is carried out to T6.
Control module constantly repeats above-mentioned circulation, until when other signals received meet the condition stopping heating, controls heating of battery unit 1 and stops heating battery.
The definition of the parameter related in this device, acquisition pattern and configuration are identical with method, as previously mentioned, do not repeat them here.
Above-mentionedly use the first timing unit 7 and the second timing unit 8 T7 and T6 writing time respectively, just in the present embodiment in order to distinguish the frame mode that two times set; In actual design, can also record these two data with a timing unit simultaneously or adopt a timer to count two data, can do corresponding design according to concrete needs, be the design of the timing unit that those skilled in the art commonly use.
Be understandable that, in concrete enforcement, when controlling heating of battery unit, above-mentionedly also to can be used alone for the technical scheme controlled described in device embodiment that battery carries out heating or part is combined, such as the above-mentioned device carrying out heating for controlling battery also only can comprise internal resistance detection unit and the first timing unit, wherein:
Internal resistance detection unit, for detecting the internal resistance R of battery and the internal resistance R detected being outputted to control unit;
First timing unit, for detecting the time T7 of heating of battery and T7 heating time detected being outputted to control unit;
Correspondingly, described control unit also comprises internal resistance judge module and very first time judge module, wherein:
Described internal resistance judge module, for by internal resistance detection unit inspection to internal resistance R compare with stopping internal resistance set point Rstop, and comparative result is sent to control module;
Described very first time judge module, compares for the T7 and maximum heating time set point Tmax heating time detected by the first timing unit, and comparative result is sent to control module;
Described control module, for internal resistance detection unit inspection to internal resistance R drop to T7 heating time that the stopping internal resistance set point Rstop of battery or the first timing unit detect reach maximum heating time set point Tmax time, control heating of battery unit and stop heating battery.
Such scheme also directly can combine to the device embodiment with above-mentioned second timing unit and corresponding control unit, repeats no more.
Be understandable that, in a particular embodiment, when controlling heating of battery unit, the above-mentioned device carrying out heating for controlling battery also only can comprise temperature detecting unit, electric power detection unit and charhing unit, wherein:
Temperature detecting unit 3, for detecting the temperature K of battery and the temperature K detected being outputted to control unit;
Electric power detection unit 4, for detecting the electricity Q of battery and the electricity Q detected being outputted to control unit;
Charhing unit 5, during for being less than heating electricity set point Qheat as electricity Q, carries out low current charge to battery;
Correspondingly, described control unit 2 also comprises temperature judge module and electricity judge module, wherein:
Described temperature judge module, compares with beginning desired temperature Kstart for the temperature K detected by temperature detecting unit 3, and comparative result is sent to control module;
Described electricity judge module, compares with heating electricity set point Qheat for the electricity Q detected by electric power detection unit 4, and comparative result is sent to control module;
Described control module, temperature K for detecting at temperature detecting unit 3 is less than beginning desired temperature Kstart, and when the electricity Q that electric power detection unit 4 detects is not less than heating electricity set point Qheat, controls described heating of battery unit 1 pair of battery and heat; And when the electricity Q that electric power detection unit 3 detects is less than heating electricity set point Qheat, control described charhing unit 5 pairs of batteries and carry out low current charge, until the electricity Q that described control unit 2 receives meets the condition starting heating, charhing unit 5 stops carrying out low current charge to battery.
Such scheme also directly can combine to the device embodiment with above-mentioned second timing unit and corresponding control unit, repeats no more.
Wherein, described heating of battery unit 1 can be any can to the device of heating of battery, such as comparatively conventional electric calorifie installation (as heating wire etc.), but the usual structure of this electric calorifie installation is comparatively complicated and take up room larger, so the volume of whole battery component can be caused to become large, electronic installation or electronic equipment is needed to have the space of larger accommodation battery.
In order to address this problem, heating of battery unit 1 of the present invention preferably adopts switch module, and 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 circuit.In fact, this switch module itself does not have heating of battery function, but can make battery instantaneous short circuit by the short time conducting of self, produces big current, thus reaches the effect that battery is heated up.Relative to electric calorifie installation, the structure of switch module is comparatively simple, small volume, in the electronic installation being more suitable for limited space or electronic equipment.
Described switch module can select various switching circuit, as triode, metal-oxide-semiconductor etc., as long as battery can be made to heat up and not damage battery and battery performance with impulse form short circuit by making battery.
Under preferable case, described switch module is insulated gate bipolar transistor (IGBT) module, IGBT module well known to a person skilled in the art electronic component, IGBT module has grid, source electrode and drain electrode, grid (i.e. control end) is for connection control unit 2, source electrode is for connecting the negative or positive electrode of battery, and drain electrode is used for the negative pole or the positive pole (connection of positive pole, negative pole depends on that the type of IGBT pipe is P type or N-type, for well known in the art) that correspondingly connect battery.IGBT module is compounded with the advantage of power field effect pipe and electron transistor and a kind of multiple device of obtaining, has that input impedance is high, operating rate fast, Heat stability is good, drive circuit are simple, on state voltage is low, proof voltage is high and bear the advantages such as electric current is large.Under preferable case, switch module can comprise the IGBT module of multiple parallel connection, and wherein one conducting just can make battery short circuit.
Those skilled in the art can select to have suitable proof voltage value or the IGBT module of resistance to current value according to the different model of battery and design capacity.Under preferable case, usually select proof voltage value to be generally the IGBT module of more than 1000V, be more preferably 1200V.Under preferable case, when the design capacity of described battery is below 100Ah, resistance to current value is selected to be the IGBT module of 3000-5000A; When the design capacity of described battery is more than 100Ah, resistance to current value is selected to be the IGBT module of 5000-10000A.
Control unit 2 shown in Fig. 2, for controlling heating of battery unit 1, can select the various applicable controller that can send control signal according to selecting of heating of battery unit 1, as single-chip microcomputer, DSP etc.
In the present invention, for the mode of heating employing switch module and to carry out battery short circuit, this control unit 2 is preferably pulse generator, and it production burst sequence the control end outputting to switch module can come conducting and the disconnection of control switch module.Equally, in order to avoid long-time short circuit causes unnecessary harm to battery, need there is certain restriction to the conducting of switch module and the time of disconnection.Under preferable case, the pulsewidth of the pulse train that pulse generator generates is generally 1-3ms, and be preferably 1-2ms, duty ratio is 5-30%, and be preferably 5-10%, the scope of duration is 30s to the second maximum heating time T 2max, be preferably 60-360s.
The data that control unit 2 is come by temperature detecting unit 3 and electric power detection unit 4 transmission, and with beginning temperature Kstart set point with heat electricity Qheat set point and compare, to determine whether they meet entry condition, and then judge whether to start heating schedule.
Above-mentioned startup heating condition and the discussion to Kstart and Qheat, mentioned above, do not repeat them here.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.

Claims (7)

1., for controlling a method for heating of battery, the method comprises the following steps:
When meeting the condition starting heating, start the heating to battery; And when meeting the condition stopping heating, stop the heating to battery;
It is characterized in that: while starting heating, timing is carried out to T6 heating time, when T6 reaches time out set point Tm, suspend heating; When T6 reaches time started set point Tn, restart heating, and clearing process is done to T6; Repeat the heating of above-mentioned time-out, restart to heat and T6 is done to the cyclic process resetting process, until meet the condition stopping heating, stop heating.
2. the method for claim 1, is characterized in that: the span of described time out set point Tm is 10s ~ 300s.
3. the method for claim 1, is characterized in that: the span of described time started set point Tn is 10s ~ 300s.
4. the method for claim 1, is characterized in that: the described condition starting heating is: the temperature K of battery is less than beginning desired temperature Kstart, and the electricity Q of battery is not less than heating electricity set point Qheat; If electricity Q is less than heating electricity set point Qheat, then low current charge is carried out to battery, repeat to judge the magnitude relationship between electricity Q and heating electricity set point Qheat, until battery electric quantity Q meets startup heating condition simultaneously; The span of described beginning desired temperature Kstart is-50 DEG C ~ 0 DEG C; Described stop heating condition be, internal resistance of cell R drop to battery stopping internal resistance set point Rstop or heating time T7 reach maximum heating time set point Tmax; The span of described stopping internal resistance set point Rstop is 48 to 41 milliohms.
5. the method for claim 1, is characterized in that: the described condition starting heating is: the temperature K of battery is less than beginning desired temperature Kstart, and the electricity Q of battery is not less than heating electricity set point Qheat; If electricity Q is less than heating electricity set point Qheat, then low current charge is carried out to battery, repeat to judge the magnitude relationship between electricity Q and heating electricity set point Qheat, until battery electric quantity Q meets startup heating condition simultaneously; The span of described beginning desired temperature Kstart is-50 DEG C ~ 0 DEG C; Described stop heating condition be, internal resistance of cell R drop to battery stopping internal resistance set point Rstop or heating time T7 reach maximum heating time set point Tmax; The span of described maximum heating time set point Tmax is 30s ~ 600s.
6., for controlling a device for heating of battery, comprising:
Heating of battery unit, for heating battery;
Second timing unit, for detecting T6 heating time of battery and T6 heating time detected being outputted to control unit;
Control unit, for when meeting the condition starting heating, starting heating of battery unit and heating battery, and when meeting the condition stopping heating, stop heating of battery unit to the heating of battery, described control unit comprises the second time judgment module and control module, wherein:
T6 and time out set point Tm heating time, time started set point Tn that described second time judgment module is used for the second timing unit to detect compare, and comparative result are sent to control module;
Described control module, when T6 heating time for detecting at the second timing unit reaching time out set point Tm, controlling heating of battery unit time-out and heating battery; Further, when T6 heating time that the second timing unit detects reaches time started set point Tn, control heating of battery unit and restart to heat battery, and clearing process is carried out to T6;
Described control module constantly repeats above-mentioned control heating of battery unit and suspends and heat battery, control heating of battery unit and restart to heat battery and carry out T6 resetting the circulation processed, until when meeting the condition stopping heating, control heating of battery unit and stop heating battery.
7. device as claimed in claim 6, is characterized in that: this device also comprises,
Internal resistance detection unit, for detecting the internal resistance R of battery and the internal resistance R detected being outputted to control unit;
First timing unit, for detecting the time T7 of heating of battery and T7 heating time detected being outputted to control unit;
Described control unit also comprises internal resistance judge module and very first time judge module;
Described internal resistance judge module, for by internal resistance detection unit inspection to internal resistance R compare with stopping internal resistance set point Rstop, and comparative result is sent to control module;
Very first time judge module, compares for the T7 and maximum heating time set point Tmax heating time detected by the first timing unit, and comparative result is sent to control module;
Described control module, also for internal resistance detection unit inspection to internal resistance R drop to T7 heating time that the stopping internal resistance set point Rstop of battery or the first timing unit detect reach maximum heating time set point Tmax time, control heating of battery unit and stop heating battery.
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CN103545573B (en) * 2012-07-17 2016-04-13 比亚迪股份有限公司 A kind of method for controlling heating of battery and device
CN105449312B (en) * 2015-10-13 2019-05-14 华富(江苏)锂电新技术有限公司 A kind of heating control circuit for lithium ion battery
CN107317066B (en) * 2017-06-30 2020-02-18 北京新能源汽车股份有限公司 Heating control method and system for power battery
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