CN103545574A - Battery heating control method and device - Google Patents
Battery heating control method and device Download PDFInfo
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- CN103545574A CN103545574A CN201210246346.0A CN201210246346A CN103545574A CN 103545574 A CN103545574 A CN 103545574A CN 201210246346 A CN201210246346 A CN 201210246346A CN 103545574 A CN103545574 A CN 103545574A
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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
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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
- H01M10/61—Types of temperature control
- H01M10/615—Heating or keeping warm
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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
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Abstract
The invention provides a battery heating control method comprising the following steps of starting heating a battery when heating starting conditions are met, and stopping heating the battery when heating stopping conditions are met, wherein the heating time is defined as T6 while the heating is started, and the heating is paused when T6 is up to the set pause time Tm; when T6 is up to the set starting time Tn, the heating is restarted, and T6 is subjected to zero clearing treatment; the circulation is repeated, and the heating is stopped until the heating stopping conditions are met. Meanwhile, the invention provides a battery heating control device comprising a battery heating unit, a control unit and a second timing unit. By using the heating control method provided by the invention, the battery can be heated stage by stage, and the heat is more uniformly radiated, therefore, the service life of the battery is prolonged.
Description
Technical field
The invention belongs to heating of battery field, relate in particular to a kind of for controlling method and the device of heating of battery.
Background technology
At present, lithium battery has become the ideal source that portable electric appts and electric motor car are used.Consider that automobile need to travel under complicated road conditions and environmental condition, or some electronic equipment need to use in poor environmental condition, so the battery as electric motor car or electronic equipment power source just need to adapt to these complicated situations, especially when electric motor car or electronic equipment are in low temperature environment, more need battery to there is excellent low temperature charge-discharge performance and higher output, input power performance.
In order to improve the serviceability of battery, under low temperature environment, we,, when using battery, will heat it, conventionally to reach good charge-discharge performance and higher output, input power performance.
Traditional heating means, arrange heater at outside batteries; This scheme is to start or stop the heating to battery by detecting the temperature of battery mostly.This heating means, can not be applicable to all situations, and start, finish with reference to single, easily go wrong.
In order to address the above problem, a kind of method for heating and controlling is disclosed in CN200910147356.7, its stop condition is more polynary than traditional heating means, by detecting the data such as the value of SOC and electric current, heating time, then completes the heating of battery simultaneously.
But existing control method is to start after heating, the continual disposable heating that completes meets until stop heating condition.Power brick is comprised of a plurality of battery series-parallel connections, battery junction resistance may have larger difference, and inside battery resistance is possibility skewness also, like this in heating process, may there is the larger temperature difference in inside battery and junction, cause local overheating, goes down for a long time, can damage battery life, cause potential safety hazard.
Summary of the invention
The present invention, for solving the disposable heating of battery process that completes, can cause battery local temperature too high, affects the technical problem of battery life, provide a kind of discontinuity carry out circulating battery heating for controlling the method and apparatus of heating of battery.
Provided by the invention a kind of for controlling the method for heating of battery, comprise the following steps: when meeting the condition that starts heating, start the heating to battery; And when meeting the condition that stops heating, stop the heating to battery.
Wherein, when starting heating, to heating time, T6 carries out timing, when T6 reaches time out set point Tm, suspends heating; When T6 reaches time started set point Tn, restart heating, and T6 is done to zero clearing and process; Repeat above-mentioned circulation, until meet the condition that stops heating, stop heating.
Meanwhile, it is a kind of for controlling the device of heating of battery that the present invention also provides, and this device comprises: heating of battery unit, for battery is heated;
The second timing unit, detects and T6 heating time detecting is outputed to control unit for T6 heating time to battery;
Control unit, for when meeting the condition that starts heating, starts heating of battery unit battery is heated, and when meeting the condition that stops heating, stop the heating of heating of battery unit to battery, described control unit comprises the second time judgment module and control module, wherein:
Described the second time judgment module for the second timing unit is detected heating time T6 and time out set point Tm, time started set point Tn compare, and comparative result be sent to control module;
Described control module, while reaching time out set point Tm for T6 heating time detecting at the second timing unit, controls heating of battery unit time-out battery is heated; And, when T6 heating time detecting at the second timing unit reaches time started set point Tn, control heating of battery unit and restart battery to heat, and T6 is carried out to zero clearing processing;
Described control module constantly repeats above-mentioned circulation, until other signals that receive while meeting the condition that stops heating, are controlled heating of battery unit and stopped battery heating.
Provided by the invention this for controlling the method and apparatus of heating of battery, the heating process starting after heating is designed and improved, with respect to prior art, method for heating and controlling provided by the invention, heating completes with the form of segmentation, between every section, there is certain off time, can make thermal diffusion more even, thereby 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 be the embodiment of the present invention provide for controlling the apparatus structure schematic diagram of heating of battery.
Embodiment
In order to make technical problem solved by the invention, technical scheme and beneficial effect clearer, 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, is not intended to limit the present invention.
First, in the present invention, so-called " battery " both comprised single battery monomer, also comprised the battery pack being comprised of a plurality of battery cells.Therefore, for the various descriptions of " battery ", be both applicable to single battery monomer, be also applicable to battery pack.For example, 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 " refers to that the internal resistance of this battery pack is R.
As previously mentioned, for solving the disposable heating of battery process that completes, can cause battery local temperature too high, affect the technical problem of battery life, it is a kind of for controlling the method for heating of battery that the embodiment of the present invention provides, and comprises the following steps:
When meeting the condition that starts heating, start the heating to battery; And when meeting the condition that stops heating, stop the heating to battery.
Wherein, when starting heating, to heating time, T6 carries out timing, when T6 reaches time out set point Tm, suspends heating; When T6 reaches time started set point Tn, restart heating, and T6 is done to zero clearing and process; Repeat above-mentioned circulation, until meet the condition that stops heating, stop heating.
It is a kind of for controlling the device of heating of battery that the embodiment of the present invention also provides, and this device comprises:
Heating of battery unit 1, for heating battery;
The second timing unit 8, detects and T6 heating time detecting is outputed to control unit 2 for T6 heating time to battery;
Described the second time judgment module for the second timing unit 8 is detected heating time T6 and time out set point Tm, time started set point Tn compare, and comparative result be sent to control module;
Described control module, while reaching time out set point Tm for T6 heating time detecting at the second timing unit 8, controls heating of battery unit 1 time-out battery is heated; And, when T6 heating time detecting at the second timing unit 8 reaches time started set point Tn, control heating of battery unit 1 and restart battery to heat, and T6 is carried out to zero clearing processing;
Described control module constantly repeats above-mentioned circulation, until other signals that receive while meeting the condition that stops heating, are controlled heating of battery unit 1 and stopped battery heating.
Above-mentioned for controlling the method and apparatus of heating of battery, the heating process starting after heating is designed and improved, with respect to prior art, method for heating and controlling provided by the invention, heating completes with the form of segmentation, between every section, there is certain off time, can make thermal diffusion more even, thereby extend the life of a cell.
In concrete enforcement, can make further optimal design to such scheme, below by specific embodiment, describe
Embodiment:
The present embodiment can be divided into three parts, starts heating part, heat stepwise cyclic part and stops heating part.Fig. 1 for according to the embodiment of the present invention for controlling the flow chart of the method for heating of battery, as shown in Figure 1, in figure " beginnings " afterwards, " start heating " to battery before, be and in the method, start the condition judgment part heating; " start heating " to battery afterwards, " stopping the heating to battery " before, the judgment part that the flow process on both sides is stop condition, middle circulation is for before stopping heating, the circulation of heat stepwise process.
What the present embodiment provided is divided into two steps on the whole for controlling the method for heating of battery: when meeting the condition that starts heating, start the heating to battery; And when meeting the condition that stops heating, stop the heating to battery.
Start heating part.
In the present embodiment, if will start the heating of battery, must possess following two conditions simultaneously:
1, the temperature K of battery is less than and starts desired temperature Kstart;
2, the electric weight Q of battery is not less than heating electric weight set point Qheat.
Meet above two conditions simultaneously, just start the heating to battery.
In ungratified situation, if do not satisfy condition 1, do not start the heating to battery, and no longer determine whether eligible 2; 1 but do not satisfy condition 2 in the situation that satisfying condition, can carry out low current charge to battery, repeat to judge the magnitude relationship between electric weight Q and heating electric weight set point Qheat, until the electric weight Q of battery is while meeting the condition of the heating that starts battery, heating of battery starts simultaneously.
That is to say, do not satisfy condition 1, illustrate that battery self-temperature meets use standard, do not need heating; If satisfy condition 1, under 2 the condition of satisfying condition at the same time, start the heating to battery; If do not satisfy condition 2, first battery is carried out to low current charge, until battery electric quantity is eligible 2, then start the heating to battery.
Traditional startup heating condition, only considers this condition of battery temperature K, and ignored to the consideration of battery electric quantity Q or when battery electric quantity Q is too low direct selection do not heat; Make, when battery electric quantity Q is too low, heating that can not complete battery pair.The present invention has taken into account the consideration to battery temperature K and battery electric quantity Q, when battery electric quantity Q is not enough, battery is carried out to low current charge, makes battery in the situation that of electric weight deficiency own, and the control of this control method of process also can realize the heating to battery.
Below, the parameter in the condition of above-mentioned startup heating is described.
Above-mentioned beginning desired temperature Kstart, for starting the maximum temperature of heating of battery, that is to say, when the temperature K of the battery only detecting is less than beginning desired temperature Kstart, just likely starts heating of battery; Wherein, the span of beginning desired temperature Kstart is-50 ℃ ~ 0 ℃.According to the difference of battery, start the also difference of choosing of desired temperature Kstart, while using the method, first according to battery, start choosing of desired temperature Kstart.
During above-mentioned heating electric weight set point Qheat, set in advance according to actual needs, its effect is to guarantee, under the sufficiently high prerequisite of battery electric quantity Q, to start heating of battery; If battery electric quantity Q is too low, can not heat, this is that system can be carried out low current charge to battery, until battery electric quantity Q is greater than or equal to heating electric weight set point Qheat.
First the beginning desired temperature Kstart of battery is chosen, its selection range can be-50 ℃ ~ 0 ℃.Then heating of battery electric weight being set to Qheat value chooses.
In above-mentioned startup heating part, need to detect the temperature K of battery and electric weight Q, these can detect by corresponding transducer.For the battery pack forming for a plurality of cells, utilize a plurality of temperature sensors to record the temperature of each cell, therefrom select minimum temperature as the temperature K use of the battery detecting.
In addition, the mode for heating, can adopt various applicable mode of heatings, as utilize electric calorifie installation to carry out electric heating.In the present invention, be preferably and short-circuit the battery so that battery heats up, this mode is not to heat from outer bound pair battery, but the large electric current causing while utilizing battery short circuit makes battery oneself intensification.Make battery short circuit realize (will be described in detail hereinafter) by connecting valve module between the both positive and negative polarity of battery (as IGBT module), can be so that battery short circuit at short notice by the conducting of switch module.
For fear of long-time short circuit, battery is caused to unnecessary harm, need to have certain restriction to the time of the conducting of switch module and disconnection.The conducting of above-mentioned switch module and disconnection are triggered by pulse train, and under preferable case, the scope of the pulsewidth of above-mentioned pulse train is 1 ~ 3ms, is preferably 1 ~ 2ms, and duty ratio is 5 ~ 30%, is preferably 5 ~ 10%.
Heat stepwise cyclic part.
When starting heating, by the second timing unit, carry out timing 8 pairs of heating times, 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 to the time zero clearing in the second timing unit 8, i.e. T6 zero clearing repeats above-mentioned timing and circulation simultaneously, until heating process finishes.
In said process, Tm and Tn are the time point with definite value setting, and Tm is heating time out point, and Tn restarts time point for heating; 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, realize the segmentation of heating process and carry out, between every section of heating, have so certain off time, can make these off times thermal diffusion more even, thereby extend the life of a cell.
Tm, Tn, according to the difference of battery, need different set points, and this,, in concrete use procedure, is set as required.The optional scope of Tm, Tn is 10s ~ 300s.
Stop heating part.
When internal resistance of cell R drop to battery stop internal resistance set point Rstop or when heating time, T7 reached maximum heating time set point Tmax, heating of battery stops.
Above-mentioned internal resistance of cell R records by transducer, and heating time, T7 recorded by the first timing unit 7.Wherein, stop internal resistance set point Rstop and maximum heating time set point Tmax all sets accordingly according to concrete battery situation.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 accurately the internal temperature of battery.With respect to more existing bases for estimation, such as gather the external temperature of battery, be difficult to reach the object of real-time monitoring battery internal temperature.And start with from surveying internal resistance, monitoring that can be real-time and obtain more accurately battery actual temperature.
In heating of battery process, according to particular flow sheet as shown in Figure 1, judge whether this heating process meets and stop heating condition, once the wherein some conditions that stops heating that meet just stop the heating to battery immediately, in order to avoid performance and the life-span of infringement battery.Certainly, in Fig. 1, given flow process is not unique, and those of ordinary skills also can design according to the condition that stops heating other judgement flow process.
In the present embodiment, Kstart chooses-19.2 ℃, and Tm chooses 60s, and Tn chooses 60s, and Tmax chooses 360s, and Rstop chooses 46 milliohms.
Below in conjunction with Fig. 2, illustrate of the present invention for controlling the device of heating of battery.
As shown in Figure 2, for the embodiment of the present invention provide for controlling the structural representation of the device of heating of battery.This device comprises:
Heating of battery unit 1, for heating battery;
Electric weight detecting unit 4, detects and the electric weight Q detecting is outputed to control unit 2 for the electric weight Q to battery;
Internal resistance detection unit 6, detects and the internal resistance R detecting is outputed to control unit 2 for the internal resistance R to battery;
The first timing unit 7, detects and T7 heating time detecting is outputed to control unit 2 for the time T 7 to heating of battery;
The second timing unit 8, detects and T6 heating time detecting is outputed to control unit 2 for T6 heating time to battery;
Above-mentioned control unit 2 comprises temperature judge module, electric weight 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 starting desired temperature Kstart for the temperature K that temperature detecting unit 3 is detected, and comparative result is sent to control module.
Electric weight judge module, compares for electric weight Q and the heating electric weight set point Qheat that electric weight detecting unit 4 is detected, and comparative result is sent to control module.
Internal resistance judge module, for internal resistance R that internal resistance detection unit 6 is detected with stop internal resistance set point Rstop and compare, and comparative result is sent to control module.
Very first time judge module, for the first timing unit 7 is detected heating time T7 and maximum heating time set point Tmax compare, and comparative result is sent to control module.
The second time judgment module, for the second timing unit 8 is detected heating time T6 and time out set point Tm, time started set point Tn compare, and comparative result be sent to control module.
Above-mentioned control module, the temperature K detecting at temperature detecting unit 3 is less than and starts desired temperature Kstart, and when the electric weight Q that electric weight detecting unit 4 detects is not less than heating electric weight set point Qheat, controls 1 pair of described heating of battery unit battery and heat; And the electric weight Q detecting when electric weight detecting unit 4 is while being less than heating electric weight set point Qheat, control 5 pairs of batteries of charhing unit and carry out low current charge, until the electric weight Q that control unit 2 receives meets the condition that starts heating, charhing unit stops battery carrying out low current charge.
When above-mentioned control module also drops to stopping T7 heating time that internal resistance set point Rstop or the first timing unit 7 detect and reaching maximum heating time set point Tmax of battery for the internal resistance R detecting in internal resistance detection unit 6, control heating of battery unit 1 and stop battery heating.
Above-mentioned control module, while also reaching time out set point Tm for T6 heating time detecting at the second timing unit 8, controls heating of battery unit 1 time-out battery is heated; And, when T6 heating time detecting at the second timing unit 8 reaches time started set point Tn, control heating of battery unit and restart battery to heat, and T6 is carried out to zero clearing processing.
Control module constantly repeats above-mentioned circulation, until other signals that receive while meeting the condition that stops heating, are controlled heating of battery unit 1 and stopped battery heating.
The definition of the parameter relating in this device, acquisition pattern and configuration are identical with method, as previously mentioned, do not repeat them here.
Above-mentioned the first timing unit 7 and the second timing unit T7 8 writing time and the T6 of using respectively, the frame mode of just setting in order to distinguish two times in the present embodiment; In actual design, can also record these two data simultaneously or adopt a timer to count two data with a timing unit, can do corresponding design according to concrete needs, be the design of the conventional timing unit of those skilled in the art.
Be understandable that, in concrete enforcement, when heating of battery unit is controlled, it is above-mentioned that for controlling, technical scheme described in the device embodiment that battery heats also can be used alone or part is combined with, for example above-mentionedly for controlling the device that battery heats, also can only comprise internal resistance detection unit and the first timing unit, wherein:
Internal resistance detection unit, detects and the internal resistance R detecting is outputed to control unit for the internal resistance R to battery;
The first timing unit, detects and T7 heating time detecting is outputed to control unit for the time T 7 to heating of battery;
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 with stop internal resistance set point Rstop and compare, and comparative result is sent to control module;
Described very first time judge module, for the first timing unit is detected heating time T7 and maximum heating time set point Tmax compare, and comparative result is sent to control module;
Described control module, for internal resistance detection unit inspection to internal resistance R while dropping to stopping T7 heating time that internal resistance set point Rstop or the first timing unit detect and reaching maximum heating time set point Tmax of battery, control heating of battery unit and stop battery heating.
Such scheme also can carry out direct combination with the device embodiment with above-mentioned the second timing unit and corresponding control unit, repeats no more.
Be understandable that, in specific embodiment, when heating of battery unit is controlled, above-mentionedly for controlling the device that battery heats, also can only comprise temperature detecting unit, electric weight detecting unit and charhing unit, wherein:
Electric weight detecting unit 4, detects and the electric weight Q detecting is outputed to control unit for the electric weight Q to battery;
Correspondingly, described control unit 2 also comprises temperature judge module and electric weight judge module, wherein:
Described temperature judge module, compares with starting desired temperature Kstart for the temperature K that temperature detecting unit 3 is detected, and comparative result is sent to control module;
Described electric weight judge module, compares for electric weight Q and the heating electric weight set point Qheat that electric weight detecting unit 4 is detected, and comparative result is sent to control module;
Described control module, for the temperature K detecting at temperature detecting unit 3, be less than and start desired temperature Kstart, and when the electric weight Q that electric weight detecting unit 4 detects is not less than heating electric weight set point Qheat, controls 1 pair of described heating of battery unit battery and heat; And the electric weight Q detecting when electric weight detecting unit 3 is while being less than heating electric weight set point Qheat, control 5 pairs of batteries of described charhing unit and carry out low current charge, until the electric weight Q that described control unit 2 receives meets the condition that starts heating, charhing unit 5 stops battery carrying out low current charge.
Such scheme also can carry out direct combination with the device embodiment with above-mentioned the second timing unit and corresponding control unit, repeats no more.
Wherein, described heating of battery unit 1 can be any device that can be to heating of battery, such as 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 larger, so can cause the volume of whole battery component to become large, need electronic installation or electronic equipment to there is the larger space that holds battery.
In order to address this problem, heating of battery of the present invention unit 1 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 large 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 small volume is more suitable in the electronic installation or electronic equipment of limited space.
Described switch module can be selected various switching circuits, as triode, metal-oxide-semiconductor etc., as long as can be by making battery battery be heated up and do not damage battery and battery performance with impulse form short circuit.
Under preferable case, described switch module is insulated gate bipolar transistor (IGBT) module, IGBT module is to well known to a person skilled in the art electronic component, IGBT module has grid, source electrode and drain electrode, grid (being control end) is for connection control unit 2, source electrode is for connecting the negative or positive electrode of battery, and drain electrode is for correspondingly connecting negative pole or the positive pole (connection anodal, negative pole depends on that the type of IGBT pipe is P type or N-type, for well known in the art) of battery.IGBT module is to be 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 is 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 a plurality of parallel connections, 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, conventionally select proof voltage value to be generally IGBT module more than 1000V, more preferably 1200V.Under preferable case, when the design capacity of described battery is 100Ah when following, selecting resistance to current value is the IGBT module of 3000-5000A; When the design capacity of described battery is 100Ah when above, selecting resistance to current value is the IGBT module of 5000-10000A.
In the present invention, for having used switch module battery to be carried out to the mode of heating of short circuit, this control unit 2 is preferably pulse generator, and it can production burst sequence and outputs to conducting and the disconnection that control switch module is brought in the control of switch module.Equally, for fear of long-time short circuit, battery is caused to unnecessary harm, need to have certain restriction to the time of the conducting of switch module and disconnection.Under 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 scope of duration is 30s to the second maximum heating time T
2max, be preferably 60-360s.
Above-mentioned startup heating condition and the discussion to Kstart and Qheat, above mentioned, 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 modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (12)
1. for controlling a method for heating of battery, the method comprises the following steps:
When meeting the condition that starts heating, start the heating to battery; And when meeting the condition that stops heating, stop the heating to battery;
It is characterized in that: when starting heating, T6 carries out timing to heating time, when T6 reaches time out set point Tm, suspend heating; When T6 reaches time started set point Tn, restart heating, and T6 is done to zero clearing and process; Repeat above-mentioned circulation, until meet the condition that stops 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 condition of described startup heating is: the temperature K of battery is less than and starts desired temperature Kstart, and the electric weight Q of battery is not less than heating electric weight set point Qheat;
If electric weight Q is less than heating electric weight set point Qheat, battery is carried out to low current charge, repeat to judge the magnitude relationship between electric weight Q and heating electric weight set point Qheat, until battery electric quantity Q meets startup heating condition simultaneously.
5. method as claimed in claim 4, is characterized in that: the span of described beginning desired temperature Kstart is-50 ℃ ~ 0 ℃.
6. the method as described in claim 1 to 5 any one, is characterized in that: described in stop heating condition be, internal resistance of cell R drop to battery stop internal resistance set point Rstop or heating time T7 reach maximum heating time set point Tmax.
7. method as claimed in claim 6, is characterized in that: described in stop internal resistance set point Rstop span be 48 to 41 milliohms.
8. method as claimed in claim 6, is characterized in that: the span of described maximum heating time set point Tmax is 30s ~ 600s.
9. method as claimed in claim 6, it is characterized in that: described beginning desired temperature Kstart is-19.2 ℃, described time out set point Tm is 60s, described time started set point Tn is 60s, described maximum heating time set point Tmax is 360s, described in to stop internal resistance set point Rstop be 46 milliohms.
10. for controlling a device for heating of battery, comprising:
Heating of battery unit, for heating battery;
The second timing unit, detects and T6 heating time detecting is outputed to control unit for T6 heating time to battery;
Control unit, for when meeting the condition that starts heating, starts heating of battery unit battery is heated, and when meeting the condition that stops heating, stop the heating of heating of battery unit to battery, described control unit comprises the second time judgment module and control module, wherein:
Described the second time judgment module for the second timing unit is detected heating time T6 and time out set point Tm, time started set point Tn compare, and comparative result be sent to control module;
Described control module, while reaching time out set point Tm for T6 heating time detecting at the second timing unit, controls heating of battery unit time-out battery is heated; And, when T6 heating time detecting at the second timing unit reaches time started set point Tn, control heating of battery unit and restart battery to heat, and T6 is carried out to zero clearing processing;
Described control module constantly repeats above-mentioned circulation, until other signals that receive while meeting the condition that stops heating, are controlled heating of battery unit and stopped battery heating.
11. devices as claimed in claim 10, is characterized in that: this device also comprises,
Internal resistance detection unit, detects and the internal resistance R detecting is outputed to control unit for the internal resistance R to battery;
The first timing unit, detects and T7 heating time detecting is outputed to control unit for the time T 7 to heating of battery;
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 with stop internal resistance set point Rstop and compare, and comparative result is sent to control module;
Very first time judge module, for the first timing unit is detected heating time T7 and maximum heating time set point Tmax compare, and comparative result is sent to control module;
Described control module, also for internal resistance detection unit inspection to internal resistance R while dropping to stopping T7 heating time that internal resistance set point Rstop or the first timing unit detect and reaching maximum heating time set point Tmax of battery, control heating of battery unit and stop battery heating.
12. devices as claimed in claim 10, is characterized in that: this device also comprises,
Temperature detecting unit, for detecting the temperature K of battery and the temperature K detecting being outputed to control unit;
Electric weight detecting unit, detects and the electric weight Q detecting is outputed to control unit for the electric weight Q to battery;
Charhing unit, while heating electric weight set point Qheat for being less than as electric weight Q, carries out low current charge to battery;
Described control unit also comprises temperature judge module and electric weight judge module, wherein:
Described temperature judge module, compares with starting desired temperature Kstart for the temperature K that temperature detecting unit is detected, and comparative result is sent to control module;
Described electric weight judge module, compares for electric weight Q and the heating electric weight set point Qheat that electric weight detecting unit is detected, and comparative result is sent to control module;
Described control module, also for the temperature K detecting at temperature detecting unit, be less than and start desired temperature Kstart, and when the electric weight Q that electric weight detecting unit detects is not less than heating electric weight set point Qheat, controls described heating of battery unit battery is heated; And the electric weight Q detecting when electric weight detecting unit is while being less than heating electric weight set point Qheat, control described charhing unit battery is carried out to low current charge, until the electric weight Q that described control unit receives meets the condition that starts heating, charhing unit stops battery carrying out low current charge.
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