CN101312296B - Charging method of battery module - Google Patents
Charging method of battery module Download PDFInfo
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- CN101312296B CN101312296B CN2007101076563A CN200710107656A CN101312296B CN 101312296 B CN101312296 B CN 101312296B CN 2007101076563 A CN2007101076563 A CN 2007101076563A CN 200710107656 A CN200710107656 A CN 200710107656A CN 101312296 B CN101312296 B CN 101312296B
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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
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- Y02E60/10—Energy storage using batteries
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Abstract
A charging method for battery modules is adaptable to a battery module comprising a plurality of groups of battery cells in parallel connection. The method comprises initially charging the battery module with certain current, then if one of the groups of parallel battery cells achieves the rated voltage, determining that whether each group of parallel batter cells of the battery module achieves a rated voltage or not, regulating the charging current or the charging voltage applied to the battery module for maintaining a certain voltage to charge the groups of parallel batter cells with the peak voltage, finally judging whether saturated charge to the battery module is achieved or not, then if the battery module is charged incompletely, continuing charging the battery module via a constant voltage, and stopping charging till the saturated charge to the battery module is achieved. Therefore, the charging method of the invention is capable of fast charging the batteries while considering safety of the batteries.
Description
Technical field
The invention relates to a kind of charging method, and particularly relevant for a kind of charging method of battery module.
Background technology
The continuous increase of, application program more and more higher along with processor performance, drawing function are more and more advanced, the electricity needs of portable computer also increases gradually, and in order to allow battery reach the portable computer electricity needs in when running, usually when the design battery, all can adopt mode with serial connection, a plurality of electric cores and joint group are assembled in the battery module, offer the portable computer use to gather enough electric power.
With respect to the raising of battery capacity, how also to be the important topic that manufacturer faced to its enforcement charging fast and safely.Because the particular design of battery module, under different time points or the different charging environment, all can produce different electric power variation, therefore, also develop the charging method that many correspondences at these characteristics of battery module.
TaiWan, China patent the 250713rd discloses a kind of electric power management circuit, and it offers the circuit of the charge parameter of electric current in order to control.Figure 1 shows that the calcspar of known electric power management circuit.As shown in the figure, electric power management circuit 100 comprises power control circuit 110, control signal generation circuit 120 and current control circuit 130.Wherein, power control circuit 110 is in order to providing the power control signal of representing DC power supply power output position standard, and control signal generation circuit 120 then is that to exceed a predetermined power thresholding position punctual when the power outputting level, reduces to offer the charge parameter of battery.In addition, 130 of current control circuits provide the current controling signal of representing DC power supply electric current outputting level, wherein on behalf of the threshold signal of threshold position standard, control signal generation circuit 120 can be further compare current controling signal and one, to exceed the threshold position punctual when the electric current outputting level, and control signal generation circuit 120 can reduce the charge parameter that offers battery further.According to as can be known above-mentioned, known technology can be at the electric power variation of battery when charging, and it is punctual to reach a threshold position at it, promptly reduces the electric power that offers battery charge.
Figure 2 shows that the schematic diagram of conventional batteries charged state.Please refer to Fig. 2, this charging method can be divided into for two stages, wherein phase I (t=0～t
1) adopting constant-current charge, 210 of charging curves are represented battery module voltage V
PCVariation.Wherein, as battery module voltage V
PCReach the voltage V that charger provides
IncThe time, then enter second stage (t=t
1～t
2), change into and carry out constant-voltage charge, fill full (t=t up to battery module
2) till.This practice is only charged at the voltage of battery module integral body, and can't adjust at the charged state of each electric core and joint group wherein, therefore might produce electric core and joint group voltage and surpass safety value, but battery module still continues the situation of charging, not only can detract life-span of electric core and joint group, also exist the danger of over-charging of battery.
Figure 3 shows that the schematic diagram of conventional batteries charged state.Please refer to Fig. 3, different with previous method is, this charging method is measured the voltage of each electric core in the battery module and joint group respectively, and according to the maximum adjustment of mensuration voltage charging kenel to the entire cell module.In detail, the phase I (t=0～t of the method
1) also adopt constant-current charge, curve 310 to represent the maximum voltage V of each electric core in the battery module and joint group
EmaxVariation, 320 of curves are represented the minimum voltage V of each electric core in the battery module and joint group
EminVariation.Wherein as this electric core and joint group voltage V
EmaxReach the rated voltage V that electric core and joint group can bear
CoffThe time, then the electric power of charge closing device is supplied with, at this moment electric core and joint group voltage V
EmaxWill begin to descend, up to electric core and joint group voltage V
EmaxDrop to the lower voltage limit V of electric core and joint group
ConThe time, recover the electric power of charger again and supply with, promote electric core and joint group voltage V
EmaxVoltage, and as electric core and joint group voltage V
EmaxReach rated voltage V
CoffJust close, so repeat out switch and close charger till all electric cores of battery module and joint group all are full of electricity.And at second stage (t=t
1～t
2) in, then be minimum voltage V according to each electric core and joint group in the battery module
EminVariation decide the size of charging current, wherein as this electric core and joint group minimum voltage V
EminSurpass the voltage V that charger gives this electric core and joint group
InccThe time, promptly enter the size that second stage progressively downgrades charging current, and equally along with electric core and joint group voltage V
EmaxVariation, power discontinuously, fill full (t=t up to battery
2) till.Can avoid single electric core and joint group to overcharge though adopt said method, but the mode that power supply is provided discontinuously must expend the long time and the electricity of battery module can be full of, and continually battery is implemented charging, discharged and also can lose the life-span of battery, still not best charging modes.
Summary of the invention
The object of the present invention is to provide a kind of charging method of battery module, to overcome the defective that exists in the known technology.
For achieving the above object, the charging method of battery module provided by the invention is applicable to a battery module that comprises that a plurality of electric cores and joint group are connected mutually, and this charging method comprises the following steps:
A. adjust the charging current that this battery module is applied so that this battery module is kept a constant-current charge;
B. judge whether each those the electric core of this battery module and the voltage of joint group reach a rated voltage;
C. when if one of them voltage of those electric cores and joint group reaches this rated voltage, this charging current that adjustment applies this battery module so that in those electric cores and the joint group voltage soprano keep the certain voltage charging and utilize this adjusted this charging current that other electric cores and joint group are charged, wherein the charging current of those electric cores and joint group is all equal;
Whether the electric power of d. judging this battery module fills full; And
E. full if the electric power of this battery module does not fill, then continue voltage the highest this electricity core and joint group are kept this constant-voltage charge, up to the electric power of this battery module fill full till.
The charging method of described battery module wherein, also comprises before the step a:
This battery module is carried out a trickle charge (trickle charge); And
Whether the voltage of judging this battery module reaches a charging start voltage, and when the voltage of this battery module reaches this charging start voltage, begins this battery module is carried out this constant-current charge.
The charging method of described battery module wherein also comprises after the step b:
If those electric cores and joint group voltage when all not reaching this rated voltage, return step a, continue this battery module is carried out this constant-current charge.
The charging method of described battery module, wherein adjust this charging current that this battery module is applied among the step c so that this battery module is kept the step of this constant-voltage charge comprises:
This charging current that c1. will offer this battery module reduces a standard;
C2. judge whether each those the electric core of this battery module and the voltage of joint group reach this rated voltage;
C3. when one of them voltage of those electric cores and joint group reached this rated voltage, this charging current that will offer this battery module again reduced this standard; And
C4. repeat above-mentioned steps c2 and c3, so that this battery module is kept the certain voltage charging.
The charging method of described battery module, a voltage max that can bear when wherein this rated voltage is for those electric cores and joint group safe operation.
The charging method of described battery module, wherein should the electricity core and the voltage of joint group when keeping this constant-voltage charge be this rated voltage.
The charging method of described battery module, whether the electric power of wherein judging this battery module fills full mode comprises:
Judge that whether the electric current that passes through this battery module is less than a minimum current;
If the electric current that passes through this battery module judges then that less than this minimum current the electric power of this battery module has filled full; And
If the electric current that passes through this battery module judges then that greater than this minimum current the electric power of this battery module does not fill full yet.
The charging method of described battery module, wherein each those electric core and joint group comprise a plurality of electric cores (cell) in parallel.
The present invention also provides a kind of charging method of battery module, is applicable to a battery module that comprises that a plurality of electric cores and joint group are connected mutually, and this charging method comprises the following steps:
A. adjust and impose on this charging voltage of this battery module so that this battery module is kept a constant-current charge;
B. judge whether each those the electric core of this battery module and the voltage of joint group reach a rated voltage;
C. when if one of them voltage of those electric cores and joint group reaches this rated voltage, adjustment impose on this battery module this charging voltage so that in those electric cores and the joint group voltage soprano keep certain voltage charging, wherein the charging current of those electric cores and joint group all equates;
Whether the electric power of d. judging this battery module fills full; And
E. full if the electric power of this battery module does not fill, then continue voltage the highest this electricity core and joint group are kept this constant-voltage charge, up to the electric power of this battery module fill full till.
The charging method of described battery module wherein also comprises before the step a:
This battery module is carried out a trickle charge; And
Whether the voltage of judging this battery module reaches a charging start voltage, and when the voltage of this battery module reaches this charging start voltage, begins this battery module is carried out this constant-current charge.
The charging method of described battery module wherein also comprises after the step b:
If those electric cores and joint group voltage when all not reaching this rated voltage, return step a, continue this battery module is carried out this constant-current charge.
The charging method of described battery module, wherein adjust among the step c and impose on this charging voltage of this battery module so that this battery module is kept the step of this constant-voltage charge comprises:
This charging voltage that c1. will offer this battery module reduces a standard;
C2. judge whether each those the electric core of this battery module and the voltage of joint group reach this rated voltage;
C3. when one of them voltage of those electric cores and joint group reached this rated voltage, this charging voltage that will offer this battery module again reduced this standard; And
C4. repeat above-mentioned steps c2 and c3, so that this battery module is kept the certain voltage charging.
The charging method of described battery module, a voltage max that can bear when wherein this rated voltage is for those electric cores and joint group safe operation.
The charging method of described battery module, wherein should the electricity core and the voltage of joint group when keeping this constant-voltage charge be this rated voltage.
The charging method of described battery module, whether the electric power of wherein judging this battery module fills full mode comprises:
Judge that whether the electric current that passes through this battery module is less than a minimum current;
If the electric current that passes through this battery module judges then that less than this minimum current the electric power of this battery module has filled full; And
If the electric current that passes through this battery module judges then that greater than this minimum current the electric power of this battery module does not fill full yet.
The charging method of described battery module, wherein each those electric core and joint group comprise a plurality of electric cores in parallel.
The charging method of battery module provided by the invention by the change in voltage of each electric core and joint group in the mensuration battery module, is in time adjusted charging current when the voltage of electric core and joint group arrives its safety value, reach the effect of electric core of protection and joint group.
The charging method of battery module provided by the invention by the change in voltage of each electric core and joint group in the mensuration battery module, is in time adjusted charging voltage when the voltage of electric core and joint group arrives its safety value, reach the effect of electric core of protection and joint group.
In other words, the charging method of the battery module that the present invention proposes, be applicable to and comprise that a plurality of electric cores and the mutual series connected battery module of joint group, the method comprise the following steps: that a. adjusts charging current that battery module is applied so that battery module is kept a constant-current charge; B. judge whether each the electric core of battery module and the voltage of joint group reach a rated voltage; C. when if one of them voltage of these electric cores and joint group reaches rated voltage, then adjust charging current that battery module is applied so that in these electric cores and the joint group voltage soprano keep the certain voltage charging and utilize this adjusted this charging current that other electric cores and joint group are charged, wherein the charging current of those electric cores and joint group is all equal; Whether the electric power of d. judging this battery module fills full; And e. is full if the electric power of battery module does not fill, and then continues voltage the highest electric core and joint group are kept constant-voltage charge, up to the electric power of battery module fill full till.
Charging method according to the described battery module of preferred embodiment of the present invention, wherein so that also comprising before keeping the step of a constant-current charge, battery module earlier battery module is carried out a trickle charge (trickle charge) adjusting charging current that battery module is applied, and whether the voltage of judging battery module reaches a charging start voltage, and when the voltage of battery module reaches this charging start voltage, begin battery module is carried out constant-current charge.
Charging method according to the described battery module of preferred embodiment of the present invention, wherein adjust the charging current that this battery module is applied and comprise that the charging current that will offer battery module earlier reduces a standard so that this battery module is kept the step of constant-voltage charge, and judge whether each the electric core of battery module and the voltage of joint group reach rated voltage, and when determining one of them voltage of these electric cores and joint group when reaching rated voltage, the charging current that will offer battery module again reduces a standard.Then repeat above-mentioned steps at last, until battery module fill full till.
The present invention proposes a kind of charging method of battery module in addition, is applicable to comprise that a plurality of electric cores and the mutual series connected battery module of joint group, the method comprise the following steps: that a. adjustment imposes on the charging voltage of battery module so that battery module is kept a constant-current charge; B. judge whether each the electric core of battery module and the voltage of joint group reach a rated voltage; C. when if one of them voltage of these electric cores and joint group reaches rated voltage, then adjust the charging voltage impose on battery module so that in these electric cores and the joint group voltage soprano keep the certain voltage charging, wherein the charging current of those electric cores and joint group all equates; Whether the electric power of d. judging battery module fills full; And e. is full if the electric power of battery module does not fill, and then continues voltage the highest electric core and joint group are kept constant-voltage charge, up to the electric power of battery module fill full till.
Charging method according to the described battery module of preferred embodiment of the present invention, wherein the charging voltage that imposes on battery module in adjustment is carried out trickle charge so that battery module also comprises before keeping the step of a constant-current charge to battery module, and whether the voltage of judging battery module reaches a charging start voltage, and when the voltage of battery module reaches the charging start voltage, begin battery module is carried out constant-current charge.
Charging method according to the described battery module of preferred embodiment of the present invention, wherein adjust the charging voltage that imposes on battery module and comprise that the charging voltage that will offer this battery module reduces a standard so that battery module is kept the step of constant-voltage charge, judge simultaneously whether each the electric core of battery module and the voltage of joint group reach rated voltage, when determining one of them voltage of these electric cores and joint group when reaching rated voltage, the charging voltage that will offer battery module again reduces a standard.Then repeat above-mentioned steps at last, until battery module fill full till.
Charging method according to the described battery module of preferred embodiment of the present invention, wherein whether the voltage at each the electric core of judging battery module and joint group reaches in the step of rated voltage, if these electric cores and joint group voltage all do not reach rated voltage, then continue battery module is carried out constant-current charge.
According to the charging method of the described battery module of preferred embodiment of the present invention, the voltage max that above-mentioned rated voltage can bear when being electric core and joint group safe operation.
Charging method according to the described battery module of preferred embodiment of the present invention, whether the electric power of wherein judging battery module fills full mode comprises that whether the electric current of judging earlier by battery module is less than a minimum current, if the electric current that passes through battery module judges then that less than minimum current the electric power of battery module has filled full; Otherwise, if the electric current that passes through battery module judges then that greater than minimum current the electric power of battery module does not fill full yet.
The present invention adopts the structure of voltage control or Current Control, charging battery module first kept a constant-current charge, and when the voltage of certain electric core and joint group in the battery module reaches its safety value, then keep the certain voltage charging, therefore can promptly promote the electric power of battery taking into account under the situation of fail safe.
For above and other objects of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly, and conjunction with figs. is described in detail below.
Description of drawings
Figure 1 shows that the calcspar of known electric power management circuit.
Figure 2 shows that the schematic diagram of conventional batteries charged state.
Figure 3 shows that the schematic diagram of conventional batteries charged state.
Fig. 4 is the charging method flow chart according to the battery module shown in the preferred embodiment of the present invention.
Fig. 5 is the charge graph according to the battery module shown in the preferred embodiment of the present invention.
Fig. 6 is to keep the method flow diagram of constant-voltage charge according to the adjustment charging current shown in the preferred embodiment of the present invention.
Fig. 7 is the charging method flow chart according to the battery module shown in the preferred embodiment of the present invention.
Fig. 8 is to keep the method flow diagram of constant-voltage charge according to the adjustment charging voltage shown in the preferred embodiment of the present invention.
Embodiment
Generally all need to use the battery module that is cascaded by a plurality of electric cores and joint group than bigger device, can obtain sufficient electric power to operate as this class power consumption of mobile computer.Yet, owing to comprised a plurality of electric cores and joint group in this class battery module, and these electric cores and joint group are after long-term the use, its capacity or charging and discharging state all change to some extent, just can not guarantee that the state of each electric core and joint group is all identical, also is not suitable for according to initial setting its enforcement being discharged and recharged again this moment.
At this point, for the situation that battery module can not be occurred overcharging in the process of charging, now developed and a kind of intelligent battery module, its can the monitoring battery module in the magnitude of voltage of each electric core and joint group, and adjust charging current or the voltage that offers battery module according to this.The present invention adopts above-mentioned intelligent battery module, and considerations such as Bindery security and charge efficiency develop the charging method of a cover battery module that.In order to make content of the present invention more clear, below the example that can implement according to this really as the present invention especially exemplified by embodiment.
Fig. 4 is the charging method flow chart according to the battery module shown in the preferred embodiment of the present invention.Please refer to Fig. 4, present embodiment is by the mode of control charging current, a battery module with a plurality of electric cores and joint group is charged, and meeting under the situation of fail safe, heighten the charging voltage and the electric current that impose on this battery module, to shorten the required time of its charging.Wherein, for example be parallel with one or more electric cores (cell) in electric core of above-mentioned each and the joint group, to store sufficient electric power.
Fig. 5 is the charge graph according to the battery module shown in the preferred embodiment of the present invention.Please be simultaneously with reference to Fig. 4 and Fig. 5, present embodiment is at first stage (t=0～t of charging
1), adjust earlier and impose on the charging current of battery module so that battery module is kept a constant-current charge (step S410).So-called herein charging current for example is a fixed current that is provided by a charger (charger), and the voltage of charger is also fixed usually.The voltage of electric core of each of battery module and joint group itself promptly can be along with the increase of the electric current that is received, and produces the voltage curve 510 that changes along with the time as shown in Figure 5 gradually, maximum voltage V in voltage curve 510 electric cores of representative herein and the joint group
EmaxCurve.
Whether the voltage that then then can judge each electric core in this battery module and joint group reaches a rated voltage (step S420).The voltage max that this rated voltage can bear when representing an electric core and joint group safe operation, and limit in order to the voltage to single electric core and joint group.Present embodiment in the scope of this rated voltage, with under the situation of the fail safe of guaranteeing each electric core and joint group, charges the voltage limit of electric core and joint group to this battery module.
Get back to step S420, if when having the voltage of any one electric core and joint group to reach aforesaid rated voltage, then the representative charging voltage that imposes on battery module has reached the higher limit that some electric cores and joint group can bear.This moment, present embodiment promptly entered the second stage (t=t of charging in order to ensure the fail safe of electric core and joint group
1～t
2), and the charging modes that will originally decide electric current is changed into the mode of deciding voltage charge (step S430).
Wherein, in order to allow the unlikely rated voltage that surpasses of magnitude of voltage of each electric core in the battery module and joint group itself.Present embodiment then is to adopt to adjust the mode of the charging current that battery module is applied, to allow electric core and joint group with maximum voltage to maintain the certain voltage charging, and this decides the rated voltage that voltage is exactly electric core and joint group.
At last, then be whether the electric power of judging battery module is full of (step S440) fully.Wherein, whether the electric power of judging battery module fills full mode comprises that whether the electric current of judging by battery module is less than a minimum current value, if less than minimum current, then represent the electric power of battery module to level off to saturated, therefore giving under the identical voltage condition, required current value is more and more little.The electric power that can judge battery module this moment has filled full, and stops battery module charge (step S450); Otherwise, full if the electric current by battery module, can judge then that the electric power of battery module does not fill yet still greater than minimum current, and return step S430, continue electric core and joint group are carried out constant-voltage charge, up to the electric power of battery module fill full till.
In addition, how to adjust charging current so that electric core and joint group are maintained this constant-voltage charge, with next in addition for an embodiment explanation.Fig. 6 is that the adjustment charging current that illustrates according to preferred embodiment of the present invention is to keep the method flow diagram of constant-voltage charge.Please refer to Fig. 6, present embodiment is to continue after above-mentioned steps S430, and according to the rated voltage that electric core and joint group can bear, adjusts charging current and decide to charge voltage under to allow electric core and joint group maintain.
In the present embodiment, initial situation is that the voltage of existing some electric cores and joint group reaches rated voltage, and in order not allow the voltage of this electric core and joint group itself surpass this rated voltage, the charging current that present embodiment will offer battery module earlier reduces a position standard (step S431).This standard is by the manufacturer of each tame charger or reaching situation according to the actual requirements by the user is defined, and the present invention does not limit its scope.In addition, after reducing charging current, charging voltage still remains unchanged, but the voltage of battery module itself then can be along with the charging current that is received reduces and decline a little, and this decline scope also can be subjected to charging current and reduces what influence certainly.And present embodiment is in order to allow charging voltage maintain necessarily as far as possible, and the accurate amplitude in the position that charging current reduced is also not too large, and allows the curve of the charging voltage among Fig. 5 keep level.
After reducing the position standard of charging voltage, the voltage potential of electric core and joint group must descend a bit, so the next step of present embodiment promptly is to continue to judge whether the voltage of each electric core in the battery module and joint group reaches rated voltage (step S432) again.In case when reaching rated voltage again, again charging current is reduced a position standard (step S433).Last then judge whether the electric power of battery module fills full (step S440), if filled fullly, then stop charging battery module (step S450); Otherwise, if do not fill fullly as yet, then repeat the above-mentioned step of falling low level, judging voltage, up to the electric power of battery module fill full till.
Mode by above-mentioned control charging current, adopt constant-current charge at the charging initial stage, and when the voltage by battery module reaches its rated voltage, change constant-voltage charge into, compared to known technology (shown in Fig. 5 dotted line), the present invention can give the charging current of battery module abundance under the situation of taking into account the battery module fail safe, and reaches the effect of quick charge.
What deserves to be mentioned is, adjust the charging current that imposes on battery module in the present embodiment and comprise also before that elder generation carries out a trickle charge (trickle charge) to battery module so that battery module is kept the step of a constant-current charge, and whether the voltage of judging battery module reaches a charging start voltage, and when the voltage of battery module reaches the charging start voltage, begin battery module is carried out constant-current charge.When adopting the reason of this step to be with big electric current the battery of over-discharge can or deep discharge to be advanced to charge, be difficult for making the capacity of battery fully to recover, therefore when the electric power of battery was extremely low, the essential mode of this trickle charge that adopts was with the protection battery.
Except above-mentioned Control current with the mode to charging battery module, the present invention also comprises the mode of utilizing control voltage, and battery module is charged, and illustrates in detail for an embodiment with next.
Fig. 7 is the charging method flow chart of the battery module that illustrates according to preferred embodiment of the present invention.Please refer to Fig. 7, present embodiment is by the mode of control charging voltage, a battery module with a plurality of electric cores and joint group is charged, and meeting under the situation of fail safe, heighten the charging voltage and the electric current that impose on this battery module, to shorten the required time of its charging.Wherein, for example be parallel with one or more electric cores (cell) in electric core of above-mentioned each and the joint group, to store sufficient electric power.
Please be simultaneously with reference to Fig. 5 and Fig. 7, as described in a same embodiment, the charging side of present embodiment to be also to comprise two steps, wherein, first stage (t=0～t
1), adjust earlier and impose on the charging voltage of battery module so that battery module is kept a constant-current charge (step S710).Wherein, charging voltage is herein provided by charger, and charging current is also fixed.The voltage of battery module itself still can be along with the increase of the electric current that is received, and produces the curve that changes along with the time as shown in Figure 5 gradually.
Whether the voltage that then then can judge each electric core in this battery module and joint group reaches a rated voltage (step S720).Wherein, if when having the voltage of any one electric core and joint group to reach aforesaid rated voltage, then the representative charging voltage that imposes on battery module has reached the higher limit that some electric cores and joint group can bear.This moment, present embodiment promptly entered the second stage (t=t of charging in order to ensure the fail safe of electric core and joint group
1～t
2), and the charging modes that will originally decide electric current is changed into the mode of deciding voltage charge (step S730).
Wherein, in order to allow the unlikely rated voltage that surpasses of magnitude of voltage of each electric core in the battery module and joint group itself.Present embodiment then is to adopt to adjust the mode of the charging voltage that battery module is applied, to allow electric core and joint group with maximum voltage to maintain the certain voltage charging, and this decides the rated voltage that voltage is exactly electric core and joint group.
At last, then be whether the electric power of judging battery module is full of (step S740) fully.Wherein, if the electric current by battery module is more and more little, up to less than minimum current the time, the electric power that can judge battery module has filled full, and stops battery module charge (step S750); Otherwise, full if the electric current by battery module, can judge then that the electric power of battery module does not fill yet still greater than minimum current, and return step S730, continue battery module is carried out constant-voltage charge, up to the electric power of battery module fill full till.
From as can be known above-mentioned, present embodiment is to adopt the mode of deciding voltage to control charging current and the voltage that offers battery module with different being in present embodiment of preceding embodiment maximum.And how to adjust charging voltage battery module is maintained this constant-voltage charge, with next in addition for an embodiment explanation.
Please refer to Fig. 8, present embodiment is to continue after above-mentioned steps S730, and according to the rated voltage that electric core and joint group can bear, adjusts charging voltage and decide to charge voltage under to allow electric core and joint group maintain.
In the present embodiment, initial situation is that the voltage of existing some electric cores and joint group reaches rated voltage, and in order not allow the voltage of this electric core and joint group itself surpass this rated voltage, the charging voltage that present embodiment will offer battery module earlier reduces a position standard (step S731).And after reducing charging voltage, charging current still remains unchanged, but the voltage of electric core and joint group itself then can be along with the charging voltage that is received reduces and decline a little, and this decline scope also can be subjected to charging voltage and reduces what influence certainly.And present embodiment is in order to allow the voltage of electric core and joint group itself maintain necessarily as far as possible, and the accurate amplitude in the position that charging voltage reduced is also not too large, and allows the curve of the charging voltage among Fig. 5 keep level.
The position that reduces charging voltage accurate after, the voltage potential of electric core and joint group must descend a bit, so the next step of present embodiment promptly is to continue to judge whether the voltage of each electric core in the battery module and joint group reaches rated voltage (step S732) again.In case when reaching rated voltage again, again charging voltage is reduced a position standard (step S733).Last then judge whether the electric power of battery module fills full (step S740), if filled fullly, then stop charging battery module (step S750); Otherwise, if do not fill fullly as yet, then repeat above-mentioned reduction charging voltage position standard, judge the step of electric core and joint group voltage, up to the electric power of battery module fill full till.
Mode by above-mentioned control charging voltage, adopt constant-current charge at the charging initial stage, and when the voltage by battery module reaches its rated voltage, change constant-voltage charge into, so can be under the situation of taking into account the battery module fail safe, give the charging current of battery module abundance, and reach the effect of quick charge.
In sum, the charging method of battery module of the present invention has following advantage at least:
1, by the voltage of each electric core and joint group in the monitoring battery module, and the charge parameter of control system.
2, the voltage that can guarantee each electric core and joint group can not surpass its rated voltage, meets the requirement of fail safe.
3, charge power supply is done the most effective utilization, change charging curve, reach the purpose of quick charge.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; anyly have the knack of this technical staff; without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is as the criterion when looking the content that the claim scope defined.
Claims (16)
1. the charging method of a battery module is applicable to a battery module that comprises that a plurality of electric cores and joint group are connected mutually, it is characterized in that it comprises the following steps:
A. adjust the charging current that this battery module is applied so that this battery module is kept a constant-current charge;
B. judge whether each those the electric core of this battery module and the voltage of joint group reach a rated voltage;
C. when if one of them voltage of those electric cores and joint group reaches this rated voltage, this charging current that adjustment applies this battery module so that in those electric cores and the joint group voltage soprano keep the certain voltage charging and utilize this adjusted this charging current that other electric cores and joint group are charged, wherein the charging current of those electric cores and joint group is all equal;
Whether the electric power of d. judging this battery module fills full; And
E. full if the electric power of this battery module does not fill, then continue voltage the highest this electricity core and joint group are kept this constant-voltage charge, up to the electric power of this battery module fill full till.
2. the charging method of battery module as claimed in claim 1 is characterized in that wherein, comprises before the step a:
This battery module is carried out a trickle charge; And
Whether the voltage of judging this battery module reaches a charging start voltage, and when the voltage of this battery module reaches this charging start voltage, begins this battery module is carried out this constant-current charge.
3. the charging method of battery module as claimed in claim 1 is characterized in that wherein, comprises after the step b:
If those electric cores and joint group voltage when all not reaching this rated voltage, return step a, continue this battery module is carried out this constant-current charge.
4. the charging method of battery module as claimed in claim 1 is characterized in that wherein, adjusts this charging current that this battery module is applied among the step c so that this battery module is kept the step of this constant-voltage charge comprises:
This charging current that c1. will offer this battery module reduces a standard;
C2. judge whether each those the electric core of this battery module and the voltage of joint group reach this rated voltage;
C3. when one of them voltage of those electric cores and joint group reached this rated voltage, this charging current that will offer this battery module again reduced this standard; And
C4. repeat above-mentioned steps c2 and c3, so that this battery module is kept the certain voltage charging.
5. the charging method of battery module as claimed in claim 1 is characterized in that wherein, the voltage max that this rated voltage can bear when being those electric cores and joint group safe operation.
6. the charging method of battery module as claimed in claim 1 is characterized in that wherein, and the voltage when this electricity core and joint group are kept this constant-voltage charge is this rated voltage.
7. the charging method of battery module as claimed in claim 1 is characterized in that wherein, and whether the electric power of judging this battery module fills full mode comprises:
Judge that whether the electric current that passes through this battery module is less than a minimum current;
If the electric current that passes through this battery module judges then that less than this minimum current the electric power of this battery module has filled full; And
If the electric current that passes through this battery module judges then that greater than this minimum current the electric power of this battery module does not fill full yet.
8. the charging method of battery module as claimed in claim 1 is characterized in that wherein, and each those electric core and joint group comprise a plurality of electric cores in parallel.
9. the charging method of a battery module is applicable to a battery module that comprises that a plurality of electric cores and joint group are connected mutually, it is characterized in that it comprises the following steps:
A. adjust and impose on this charging voltage of this battery module so that this battery module is kept a constant-current charge;
B. judge whether each those the electric core of this battery module and the voltage of joint group reach a rated voltage;
C. when if one of them voltage of those electric cores and joint group reaches this rated voltage, adjustment impose on this battery module this charging voltage so that in those electric cores and the joint group voltage soprano keep certain voltage charging, wherein the charging current of those electric cores and joint group all equates;
Whether the electric power of d. judging this battery module fills full; And
E. full if the electric power of this battery module does not fill, then continue voltage the highest this electricity core and joint group are kept this constant-voltage charge, up to the electric power of this battery module fill full till.
10. the charging method of battery module as claimed in claim 9 is characterized in that wherein, comprises before the step a:
This battery module is carried out a trickle charge; And
Whether the voltage of judging this battery module reaches a charging start voltage, and when the voltage of this battery module reaches this charging start voltage, begins this battery module is carried out this constant-current charge.
11. the charging method of battery module as claimed in claim 9 is characterized in that wherein, comprises after the step b:
If those electric cores and joint group voltage when all not reaching this rated voltage, return step a, continue this battery module is carried out this constant-current charge.
12. the charging method of battery module as claimed in claim 9 is characterized in that wherein, adjusts among the step c to impose on this charging voltage of this battery module so that this battery module is kept the step of this constant-voltage charge comprises:
This charging voltage that c1. will offer this battery module reduces a standard;
C2. judge whether each those the electric core of this battery module and the voltage of joint group reach this rated voltage;
C3. when one of them voltage of those electric cores and joint group reached this rated voltage, this charging voltage that will offer this battery module again reduced this standard; And
C4. repeat above-mentioned steps c2 and c3, so that this battery module is kept the certain voltage charging.
13. the charging method of battery module as claimed in claim 9 is characterized in that wherein, the voltage max that this rated voltage can bear when being those electric cores and joint group safe operation.
14. the charging method of battery module as claimed in claim 9 is characterized in that wherein, the voltage when this electricity core and joint group are kept this constant-voltage charge is this rated voltage.
15. the charging method of battery module as claimed in claim 9 is characterized in that wherein, whether the electric power of judging this battery module fills full mode comprises:
Judge that whether the electric current that passes through this battery module is less than a minimum current;
If the electric current that passes through this battery module judges then that less than this minimum current the electric power of this battery module has filled full; And
If the electric current that passes through this battery module judges then that greater than this minimum current the electric power of this battery module does not fill full yet.
16. the charging method of battery module as claimed in claim 9 is characterized in that wherein, each those electric core and joint group comprise a plurality of electric cores in parallel.
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| CN2007101076563A CN101312296B (en) | 2007-05-23 | 2007-05-23 | Charging method of battery module |
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| CN101312296B true CN101312296B (en) | 2010-12-22 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103138022A (en) * | 2013-03-07 | 2013-06-05 | 清华大学 | Battery pack charging method |
| CN106329643B (en) * | 2016-09-13 | 2018-12-14 | 北京经纬恒润科技有限公司 | A kind of charge control method and system |
| CN110534827A (en) * | 2019-08-23 | 2019-12-03 | 江西优特汽车技术有限公司 | A kind of charging method of series-connected cell group |
| CN110838746B (en) * | 2019-11-27 | 2023-10-13 | 深圳古瑞瓦特新能源有限公司 | Battery parallel circuit and battery parallel device |
| CN113746151A (en) * | 2020-05-29 | 2021-12-03 | 华为技术有限公司 | Battery charging method, electronic device, storage medium and program product |
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