CN103036268A - Power supply device - Google Patents
Power supply device Download PDFInfo
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- CN103036268A CN103036268A CN201210361900XA CN201210361900A CN103036268A CN 103036268 A CN103036268 A CN 103036268A CN 201210361900X A CN201210361900X A CN 201210361900XA CN 201210361900 A CN201210361900 A CN 201210361900A CN 103036268 A CN103036268 A CN 103036268A
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- battery module
- residual capacity
- voltage
- bidirectional transducer
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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 power supply device which eliminates the useless electric consumption for balancing and prevents heating due to Joule heat. Battery module can effectively discharge without over-discharging, thereby effectively outputting all electric power stored in the battery module. The power supply device is in parallel connection with a plurality of battery modules (1) via bidirectional convertors (2) and outputs the DC current of the battery modules (1) to the output side via the bidirectional convertors (2). The power supply device has a control circuit (3) which controls the current limit value of the bidirectional convertors (2) by detecting the voltage of the battery modules (1) and residual capacity. The control circuit (3) controls the discharge current limit value of the bidirectional convertors (2) connected with the battery modules (1) with lower voltage or small residual capacity to be lower than the discharge current limit value of the bidirectional convertors (2) connected with the battery modules (1) with higher voltage or large residual capacity to balance the voltage or residual capacity of the battery modules (1).
Description
Technical field
The present invention relates to particularly can in the voltage that makes each battery module or residual capacity equalization, discharge the supply unit that perhaps charges via the bidirectional transducer supply unit that a plurality of battery modules form that is connected in parallel.
Background technology
Supply unit can make output increase by a plurality of battery modules that are connected in parallel via bidirectional transducer.Each battery module can make to add up to output to increase by exporting via bidirectional transducer.Output after bidirectional transducer can become to exchange with the DC converting of battery module perhaps becomes exchange conversion direct current to come battery module is charged.The supply unit that this circuit consists of is characterised in that, does not increase the output of bidirectional transducer, and by increasing the number of supply unit and bidirectional transducer, adds up to output thereby can increase.In addition, also has following feature, even specific battery module or bidirectional transducer break down, also can come output AC by other battery module and bidirectional transducer, this supply unit can use as jumbo supply unit (with reference to patent documentation 1).
Patent documentation 1:JP JP 2001-286071 communique
If via bidirectional transducer a plurality of battery modules that are connected in parallel, then the voltage of battery module or residual capacity might become unbalance.For example, when upgrading (refresh) at the specific battery module of exchange or to specific battery module, voltage or the residual capacity of specific battery module can become unbalance.If a plurality of battery modules that voltage or residual capacity are under the unbalance state discharge together, the battery module that then voltage is low or residual capacity is little can be introduced into over-discharge state.Because the overdischarge of battery module significantly reduces the electrical characteristic of battery and shortens the life-span, therefore overcharges in order to prevent, need to stop discharge.Therefore, if the lower voltage that becomes specific battery module reduces and becomes the state of overdischarge to minimum voltage or residual capacity, then need to stop the discharge of this battery module, prevent overdischarge.
If the voltage of battery module or residual capacity are in imbalance state, even then specific battery module becomes the state of overdischarge, other battery module also is in the state that can discharge.Therefore, stop to become the discharge of battery module of the state of overdischarge, and discharge by the battery module from other, can effectively utilize the electric power of whole battery modules.But this state might not talkatively be exactly desirable discharge condition in possessing the supply unit of a plurality of battery modules.This is because if specifically the lower voltage of battery module is to minimum voltage, or specifically the residual capacity of battery module reduces and becomes over-discharge state, can make this battery module deteriorated.In addition, under the state of the discharge of the specific battery module that stops to be in over-discharge state, the state that the battery module that can discharge from other discharges, the discharge capacity that discharges from each battery module that can discharge increases, thereby increased the burden of each battery module, also can become the reason that makes these battery modules deteriorated.
And then, be at a plurality of battery modules in the situation of state of overdischarge, even stop the discharge of these battery modules and discharge from other the battery module that can discharge, if the discharge capacity of the not enough regulation of the discharge capacity of the total of the battery module that can discharge then can produce the problem that can not discharge.Therefore, if become this state, then no matter whether the battery module that can discharge is arranged, all can not effectively utilize the electric power of this battery module.
Summary of the invention
The object of the invention is to solve above-mentioned shortcoming and develops.Important purpose of the present invention is to provide a kind of supply unit, even voltage or the residual capacity of battery module are in unbalance state arbitrarily, do not make which battery module overdischarge yet, thereby can effectively prevent the deteriorated of specific battery module, and, in the deviation of the degradation that reduces each battery module, can export efficiently the electric power of savings in whole battery modules.
In addition, the voltage of battery module or the residual capacity shortcoming that can become unbalance state can be eliminated by voltage or the residual capacity of equalization battery module.That is, can discharge the equalization battery module to the large battery module of residual capacity by the equalization circuit of special use.But, the supply unit that battery module is discharged carry out equalization in the equalization circuit not only can be because of the discharge of battery module unnecessary consumption electric power, also need the Joule heat that produces is dispelled the heat.At this, be formed in the large-scale supply unit optimum via the be connected in parallel circuit of a plurality of battery modules of bidirectional transducer, therefore, it is large that the capacity of battery module also can become, it is large that the power consumption of discharging because of equalization becomes, large thereby meaningless power consumption becomes, thereby the caloric value that produces because of Joule heat becomes and is difficult to quite greatly heat radiation, and then, exist the load resistance that in discharge, uses also to need to use the various drawbacks such as large element that can tolerate large electric power.
Other free-revving engine of the present invention is, a kind of supply unit is provided, can eliminate the meaningless power consumption that is used for equalization, and prevent because of the thermogenetic heating of joule, and omitted the jumbo load resistance that uses in the discharge, do not make which battery module overdischarge, just can in equalization all batteries module, discharge.
Supply unit of the present invention is via bidirectional transducer 2 a plurality of battery modules 1 that are connected in parallel, and the direct current power of each battery module 1 outputed to outlet side via connected each bidirectional transducer 2, wherein, bidirectional transducer 2 is the interchange of outlet side with the DC converting of battery module 1, and is the direct current of battery side with the exchange conversion of outlet side.And then, supply unit possesses: control circuit 3, this control circuit 3 detects voltage or the residual capacity of each battery module 1, and the current limit value of control bidirectional transducer 2, the discharging current limits value of the bidirectional transducer 2 that control circuit 3 will battery module 1 low with voltage or that residual capacity is little be connected limits to such an extent that the discharging current limits value of the bidirectional transducer 2 that is connected than battery module 1 high with voltage or that residual capacity is large is little, comes thus voltage or the residual capacity of each battery module 1 of equalization.
Above supply unit is characterised in that, even the voltage of battery module or residual capacity are in unbalance state arbitrarily, can both not make which battery module overdischarge, and can prevent effectively that specific battery module is deteriorated, and can in the deviation of the degradation that reduces each battery module, will put aside efficiently the electric power output in whole battery modules.This be because, because the discharging current limits value of the battery module that above supply unit is little with lower voltage or residual capacity limits littlely, in equalization, discharge, therefore can in the overdischarge that prevents this battery module, make whole battery module discharges, thus can be efficiently with the electric power output of savings in whole battery modules.
Above supply unit is because thereby lower voltage or the residual capacity of battery module reduce to produce in the unbalance situation arbitrarily, specific battery module is not to discharge into the state that becomes overdischarge, but the discharging current limits value of the battery module that lower voltage or residual capacity are diminished limit less in from whole battery module discharges.Thus, can effectively prevent specific battery module overdischarge, and can with other battery module equalization in the discharge of realizing ideal.So, in possessing the supply unit of a plurality of battery modules, the electrical characteristic of whole battery modules is all unified identical state, thereby when the load that makes each battery module burden equates, discharge and be ideal state, thus, can effectively prevent from producing between each battery module the deviation of degradation, can realize the long-life.
And then above supply unit can not consume meaningless electric power for each battery module of equalization, owing to being not to make battery module carry out conductive discharge to come equalization, therefore can prevent the heating that produces because of the Joule heat that is used for equalization in addition.And then, owing to not needing to make the battery module conductive discharge to come equalization, therefore can omit the jumbo load resistance that uses for the equalization battery module.
The charge-current limit value of the bidirectional transducer 2 that supply unit of the present invention can will battery module 1 high with voltage or that residual capacity is large be connected by control circuit 3 is controlled to such an extent that the charge-current limit value of the bidirectional transducer 2 that is connected than battery module 1 low with voltage or that residual capacity is little is little, comes thus voltage or the residual capacity of each battery module 1 of equalization.
Above supply unit can not make voltage battery module high or that residual capacity is large overcharge, can be in the voltage or residual capacity equalization of battery module, efficiently to whole charging battery modules.
Supply unit of the present invention can limit littlely than the discharging current limits value of the bidirectional transducer 2 that is connected with other battery module 1 by the discharging current limits value of control circuit 3 by the bidirectional transducer 2 that will battery module 1 minimum with voltage or that residual capacity is minimum be connected, discharge like this, come thus voltage or the residual capacity of each battery module 1 of equalization.
In the above supply unit, control circuit can discharge when simply being controlled at the equalization battery module.
In the supply unit of the present invention, control circuit 3 can be controlled according to the current limit value of the mode pair bidirectional transducer 2 that with each battery module 1 be connected suitable with the ratio of the voltage of each battery module 1 or residual capacity, comes voltage or the residual capacity of each battery module 1 of equalization.
Above supply unit can discharge in the equalization battery module rapidly efficiently.
In the supply unit of the present invention, the voltage of the battery module 1 that control circuit 3 energy computings are whole or the mean value of residual capacity, the discharging current limits value of the bidirectional transducer 2 that will be connected with voltage or the residual capacity battery module 1 less than the mean value that calculates limits littlely than other the discharging current limits value of bidirectional transducer 2, comes voltage or the residual capacity of each battery module 1 of equalization.
Above supply unit can with the simple control of control circuit, discharge in the equalization battery module efficiently.
In the supply unit of the present invention, the voltage of the battery module 1 that control circuit 3 energy computings are whole or the mean value of residual capacity, the discharging current limits value of the bidirectional transducer 2 that will be connected with voltage or the residual capacity battery module 1 less than the mean value that calculates limits littlely than other the discharging current limits value of bidirectional transducer 2, and along with becoming large with the poor of mean value, the discharging current limits value of the bidirectional transducer 2 that will be connected with voltage or the residual capacity battery module 1 less than mean value limits littlely.
Above supply unit can not make the battery module overdischarge that voltage is low or residual capacity is little, and can make efficiently the discharge of all batteries module when promptly carrying out equalization, can make thus to add up to output larger.
In the supply unit of the present invention, the voltage of the battery module 1 that control circuit 3 energy computings are whole or the mean value of residual capacity, the charge-current limit value of the bidirectional transducer 2 that will be connected with voltage or the residual capacity battery module 1 larger than the mean value that calculates limits littlely than other the charge-current limit value of bidirectional transducer 2, comes voltage or the residual capacity of each battery module 1 of equalization.
Above supply unit can with the simple control of control circuit, charge in the equalization battery module efficiently.
In the supply unit of the present invention, the voltage of the battery module 1 that control circuit 3 energy computings are whole or the mean value of residual capacity, the charge-current limit value of the bidirectional transducer 2 that will be connected with voltage or the residual capacity battery module 1 larger than the mean value that calculates limits littlely than other the charge-current limit value of bidirectional transducer 2, and along with becoming large with the poor of mean value, the charge-current limit value of the bidirectional transducer 2 that will be connected with voltage or the residual capacity battery module 1 larger than mean value limits littlely.
Above supply unit can not make voltage battery module high or that residual capacity is large overcharge, and can charge to all batteries module efficiently when promptly carrying out equalization.
Description of drawings
Fig. 1 is the summary pie graph of the related supply unit of one embodiment of the present of invention.
Fig. 2 is the circuit diagram of the bidirectional transducer of supply unit shown in Figure 1.
Fig. 3 is expression supply unit shown in Figure 1 carries out the state of equalization when making the different battery module discharge of residual capacity figure.
Fig. 4 is expression supply unit shown in Figure 1 carries out the state of equalization in the charging battery module different to residual capacity figure.
Fig. 5 is that expression makes the discharging current limits value of the bidirectional transducer that the battery module of state shown in Figure 3 discharges and the figure of discharging current.
Fig. 6 is other the figure of an example that makes the discharging current limits value of bidirectional transducer of the different battery module of residual capacity discharge and discharging current.
Fig. 7 is other the figure of an example that makes the discharging current limits value of bidirectional transducer of the different battery module of residual capacity discharge and discharging current.
Symbol description:
1 battery module
2 bidirectional transducers
3 control circuits
4 batteries
5 switch elements
6 switching circuits
7 output lines
8 testing circuits
Embodiment
Below, based on accompanying drawing embodiments of the invention are described.But embodiment shown below is that supply unit of the present invention is not specific to following embodiment be used to the illustration of the supply unit that technological thought of the present invention is specialized.And then for the easy to understand claim, specification makes an addition to the parts shown in " claim " and " summary of the invention " with the numbering corresponding with the parts shown in the embodiment.But the parts shown in the claim are the parts in the embodiment never.
Supply unit shown in Figure 1 is via bidirectional transducer 2 a plurality of battery modules 1 that are connected in parallel.Battery module 1 possesses a plurality of batteries 4 that can charge.Be connected in series a plurality of batteries 4 and can improve output voltage, in addition, a plurality of batteries 4 that are connected in parallel can increase output current.The battery 4 of battery module 1 can use lithium ion battery, lithium polymer battery, Ni-MH battery, nickel-cadmium cell, excide battery etc.Battery module 1 is set as output voltage and the corresponding voltage of purposes according to the quantity of the battery 4 that is connected in series.Battery module 1 is for example adjusted the number of the battery 4 that is connected in series, and output voltage is set as 10V～300V, is preferably set to 30V～200V.And then battery module 1 a plurality of batteries 4 that are connected in parallel increase output current.Be connected in parallel supply unit that a plurality of battery modules 1 form owing to using via bidirectional transducer 2 in the purposes of large output, therefore, series connected battery 4 improves output voltage, and the battery 4 or increase output current with jumbo battery 4 of being connected in parallel.
Bidirectional transducer 2 is that the interchange of outlet side is exported with the DC converting of battery module 1, in addition, is that the direct current of battery 4 sides comes battery module 1 is charged with the exchange conversion of outlet side.Fig. 2 shows the circuit diagram of bidirectional transducer 2.It is to exchange that this bidirectional transducer 2 possesses DC converting, is the switch element 5 of direct current in addition with exchange conversion.This bidirectional transducer 2 switches the conduction and cut-off of this switch element 5, thereby DC converting is interchange and output, in addition, is that direct current comes battery module 1 is charged with the exchange conversion of inputting.This bidirectional transducer 2 switches the conduction and cut-off of switch element 5 under the high state of the voltage ratio outlet side of battery module 1, thereby the DC converting of battery module 1 is outputed to outlet side after exchanging, under the high state of the voltage ratio battery module 1 of outlet side, switch the conduction and cut-off of switch element 5, thereby be that direct current comes battery module 1 is charged with exchange conversion.
The bidirectional transducer 2 of Fig. 2 is directly connected to the output of switch element 5 output line 7 of outlet side, but also can transformer be set at the outlet side of switch element, carries out behind the voltage transformation interchange being outputed to output line with this transformer.In addition, can also filter be set at the outlet side of switch element, output to output line after making output waveform become sine wave.
The supply unit of Fig. 1 is owing to being connected in parallel via a plurality of bidirectional transducers 2, therefore, the switch element 5 of each bidirectional transducer 2 carries out switch motion synchronously with one another, DC converting is outputed to output line 7 after exchanging, in addition, the exchange conversion with output line 7 is that direct current comes battery module 1 is charged.
Bidirectional transducer 2 possesses the switching circuit 6 of the conduction and cut-off of diverter switch element 5.The duty ratio of the conduction and cut-off of switching circuit 6 control diverter switch elements 5, thereby discharging current limits value and the charge-current limit value of control bidirectional transducer 2.Switching circuit 6 namely increases duty ratio by elongating the timing (timing) that switch element 5 is switched to conducting, increases discharging current limits value and charge-current limit value.
For the conduction and cut-off of the switch element 5 that synchronously switches each bidirectional transducer 2, and charge-current limit value and the discharging current limits value of bidirectional transducer 2 controlled, from 3 pairs of switching circuit 6 input sync signals of control circuit and control signal.
Discharging current limits value and charge-current limit value that control circuit 3 comes each bidirectional transducer 2 of computing according to voltage or the residual capacity of each battery module 1, and control signal outputed to switching circuit 6.In addition, to each bidirectional transducer 2 output synchronizing signals, so that synchronously switch the conduction and cut-off of the switch element 5 of whole bidirectional transducer 2, thus the interchange of output homophase.The switching circuit 6 of bidirectional transducer 2 is controlled the duty ratio of the conduction and cut-off of diverter switch element 5 according to the control signal of inputting, thus controlled discharge current limit value and charge-current limit value.In addition, come the conduction and cut-off of diverter switch element 5 with synchronizing signal, thereby the interchange of homophase is outputed to outlet side.
Control circuit 3 detects voltage or the residual capacity of each battery module 1, controls the current limit value of bidirectional transducer 2.The supply unit of Fig. 2 is provided with in each battery module 1 for detection of the voltage of battery module 1 or the testing circuit 8 of residual capacity.Even if testing circuit 8 is not set in battery module 1, the voltage that the control circuit 3 that the voltage that detects battery module 1 is controlled the current limit value of bidirectional transducer 2 also can detect battery module 1 is controlled the current limit value of bidirectional transducer 2.Detect residual capacity and control the supply unit of the current limit value of bidirectional transducer 2 detects battery module 1 with testing circuit 8 residual capacity, and detected residual capacity is exported to control circuit 3.The charging and discharging currents of 8 pairs of battery modules 1 of this testing circuit adds up to come the computing residual capacity, perhaps the voltage according to battery module 1 comes the computing residual capacity, and then with the residual capacity that voltage comes revisal to calculate according to charging and discharging currents, detect thus residual capacity.
Under the state that battery module 1 is discharged, the discharging current limits value of the bidirectional transducer 2 that control circuit 3 will battery module 1 low with voltage or that residual capacity is little be connected limits to such an extent that the discharging current limits value of the bidirectional transducer 2 that is connected than battery module 1 high with voltage or that residual capacity is large is little, thereby discharges in the voltage that makes each battery module 1 or residual capacity equalization.
Fig. 3 illustrates and makes residual capacity different 4 Battery pack modules A, B, C, D discharge the state of equalization.This diagram send as an envoy to the battery module B of residual capacity 70%, battery module A, the C of residual capacity 80%, the state that D discharges equalization.The little battery module B of residual capacity is restricted to the 10A less than other bidirectional transducer with the discharging current limits value of connected bidirectional transducer, to be made as 40A with other battery module A, C, the discharging current limits value of bidirectional transducer that D is connected, illustration carry out the state of equalization as the state of 100A take the discharging current that adds up to.Be that 70% battery module B discharges via the bidirectional transducer that the discharging current limits value is made as 10A owing to residual capacity, therefore, to add up to discharging current be under the state of 100A establishing, and discharges with 10A.Other battery module A, C, D discharge with 30A, add up to discharging current to become 100A thereby make.
If discharge under above state, battery module A, C, the D of other that the battery module B that then discharging current is little and discharging current are large compare, and the minimizing of residual capacity tails off.Therefore, passed through official hour after, the residual capacity of the battery module B that residual capacity is little can become with other the residual capacity of battery module A, C, D and equate.Thereby if residual capacity become equate to carry out equalization after, afterwards, the discharging current limits value is set as identical 40A, be that 25A makes whole battery module A, B, C, D discharge with identical electric current, to add up to discharging current be 100A thereby establish.Each battery module A that under this state, discharges, B, C, D since residual capacity equate, therefore side by side discharge into residual capacity and be till 0%.That is, need not make specific battery module overdischarge, just can make the together fully discharge of whole battery modules.
Fig. 4 illustrates the state that residual capacity different 4 groups battery module A, B, C, D is charged with equalization.The figure shows residual capacity is that 30% battery module B and residual capacity are 20% battery module A, C, the state that D charges with equalization.The large battery module B of residual capacity is made as 10A with the charge-current limit value of connected bidirectional transducer, to be made as 40A with other battery module A, C, the charge-current limit value of bidirectional transducer that D is connected, illustration the state take the charging current that adds up to as 100A, come in charging, to carry out the state of equalization.Charge via the bidirectional transducer that the charge-current limit value is made as 10A because residual capacity is 30% battery module B, therefore adding up to charging current to be made as under the state of 100A, charge with 10A.Come other battery module A, C, D are charged with 30A, add up to charging current to become 100A.
If charge under above state, battery module A, C, the D of other that the battery module B that then charging current is little and charging current are large compare, and the increase of residual capacity tails off.Therefore, through behind the official hour, the residual capacity of the battery module B that residual capacity is large becomes and equates with other battery module A, C, the residual capacity of D.Residual capacity becomes equal and after carrying out equalization, afterwards, the charge-current limit value is set as identical 40A, is that 25A comes whole battery module A, B, C, D are charged with identical electric current, will add up to charging current to be made as 100A.Each battery module A that is recharged under this state, B, C, D are because residual capacity is equal, and therefore, side by side being charged to residual capacity becomes till 100%.That is, specific battery module is overcharged, just can make the together completely charging of whole battery modules.
Control circuit 3 is controlled the duty ratio of the conduction and cut-off of diverter switch element 5 via the switching circuit 6 of bidirectional transducer 2, control thus discharging current limits value or the charge-current limit value of bidirectional transducer 2.The control circuit 3 of the supply unit of Fig. 1 and Fig. 2 detects the residual capacity of battery modules 1, controls the current limit value of bidirectional transducer 2 according to this residual capacity, discharges when making the residual capacity equalization of each battery module 1 or charges.
Fig. 5 illustrates discharging current limits value and the discharging current of the bidirectional transducer of the battery module A, the B that make state shown in Figure 3, C, D discharge.As shown in Figure 5, the discharging current limits value of the bidirectional transducer 2 that supply unit will be connected with the battery module B of residual capacity minimum with control circuit 3 limits than little with the discharging current limits value of other battery module A, C, bidirectional transducer 2 that D is connected, discharge thus, make the residual capacity equalization of each battery module A, B, C, D.In the chart of Fig. 5, outer frame part represents the discharging current limits value, and oblique line partly represents actual discharge current value.
As shown in Figure 6, supply unit is controlled the current limit value of the bidirectional transducer that is connected with each battery module according to the mode suitable with the ratio of the residual capacity of each battery module 1 with control circuit 3, can make thus the residual capacity equalization of each battery module.Fig. 6 illustrates and makes residual capacity is that 80% battery module A, residual capacity are that 70% battery module B, residual capacity are that 75% battery module C and residual capacity are the state that 80% battery module D discharges equalization.Because battery module B, the residual capacity of C is less, therefore this supply unit is according to the mode suitable with the ratio of residual capacity, will with battery module B, the current limit value of the bidirectional transducer that C connects is controlled littlely, namely, the discharging current limits value of the bidirectional transducer that will be connected with battery module B is restricted to 10A, the discharging current limits value of the bidirectional transducer that will be connected with battery module C is restricted to 20A, will with battery module A, the discharging current limits value of the bidirectional transducer that D connects is set as 40A and discharges, thus the residual capacity of the whole battery module of equalization.Be under the state of 100A at the total electric current of establishing discharge, the discharging current of establishing battery module B is 10A, and the discharging current of establishing battery module C is 20A, and the discharging current of establishing battery module A, D is 35A.As under this state, discharging, then the ratio of the minimizing of the residual capacity of battery module B, C is compared and will be lacked with battery module A, D, and then the ratio battery module C of the minimizing of the residual capacity of battery module B is little, through after the discharge of stipulated time, residual capacity is by equalization.
And then, the voltage of the control circuit 3 energy computing all batteries modules of supply unit or the mean value of residual capacity, the discharging current limits value of the bidirectional transducer 2 that will be connected with voltage or the residual capacity battery module less than the mean value that calculates limits littlely than other bidirectional transducer 2, thereby comes voltage or the residual capacity of each battery module 1 of equalization.Supply unit limits littlely than other bidirectional transducer 2 by the discharging current limits value of the bidirectional transducer 2 that will be connected with voltage or the residual capacity battery module 1 less than the mean value that calculates with control circuit 3, and the discharging current limits value of the bidirectional transducer 2 that will be connected with voltage or the residual capacity battery module 1 less than mean value along with becoming large with mean value poor limits littlely, can carry out equalization when battery module 1 is discharged thus.
This state shown in Figure 7.Shown in Fig. 7 take the residual capacity of battery module A, C, D as 80%, the residual capacity of battery module B gets off to carry out the state of equalization as 70% state.Because the mean value of the residual capacity of battery module A, B, C, D is 77.5%, thus the residual capacity of battery module B than mean value low 7.5%.Therefore, the discharging current limits value by the bidirectional transducer that will be connected less than the battery module B of mean value with residual capacity limits to get less the discharge, can the equalization battery module.In addition, by along with becoming large with mean value poor and limit the discharging current limits value of battery module B less, can be when battery module be discharged rapid equalization.
Above, control the discharging current limits value of bidirectional transducer 2 with the residual capacity of battery module 1, but also can control with the voltage of battery module 1 the discharging current limits value of bidirectional transducer 2, so that identical with residual capacity, thus come equalization battery module 1.
And then supply unit can carry out equalization in to battery module 1 charging.The charge-current limit value of the bidirectional transducer 2 that this supply unit will battery module 1 high with voltage or that residual capacity is large be connected with control circuit 3 is controlled to such an extent that the charge-current limit value of the bidirectional transducer 2 that is connected than battery module 1 low with voltage or that residual capacity is little is little, thereby comes voltage or the residual capacity of each battery module 1 of equalization.
Above supply unit discharges the device of equalization identical with aforementioned like that, can come the voltage of the whole battery module of computing 1 or the mean value of residual capacity with control circuit 3, the charge-current limit value of the bidirectional transducer 2 that will be connected with voltage or the residual capacity battery module 1 larger than the mean value that calculates limits littlely than other the charge-current limit value of bidirectional transducer 2, thereby comes voltage or the residual capacity of each battery module 1 of equalization.The charge-current limit value of the bidirectional transducer 2 that this supply unit will be connected with voltage or the residual capacity battery module 1 larger than the mean value that calculates with control circuit 3 limits littlely than other the charge-current limit value of bidirectional transducer 2, and the charge-current limit value of the bidirectional transducer 2 that will be connected with voltage or the residual capacity battery module 1 larger than mean value along with becoming large with mean value poor limits littlely, can charge in promptly with the voltage of battery module 1 or residual capacity equalization thus.
Claims (8)
1. supply unit, following formation: via bidirectional transducer, (2) a plurality of battery modules that are connected in parallel, (1), and with each battery module, (1) direct current power is via connected each bidirectional transducer, (2) output to outlet side, wherein, described bidirectional transducer, (2) with described battery module, (1) DC converting is the interchange of outlet side, and be battery with the exchange conversion of outlet side, (4) direct current of side, described supply unit is characterised in that
Described supply unit possesses control circuit (3), and this control circuit (3) detects voltage or the residual capacity of each battery module (1), and the current limit value of control bidirectional transducer (2),
The discharging current limits value of the bidirectional transducer (2) that described control circuit (3) will battery module (1) low with voltage or that residual capacity is little be connected limits to such an extent that the discharging current limits value of the bidirectional transducer (2) that is connected than battery module (1) high with voltage or that residual capacity is large is little, comes thus voltage or the residual capacity of each battery module of equalization (1).
2. supply unit according to claim 1 is characterized in that,
The charge-current limit value of the bidirectional transducer (2) that described control circuit (3) will battery module (1) high with voltage or that residual capacity is large be connected is controlled to such an extent that the charge-current limit value of the bidirectional transducer (2) that is connected than battery module (1) low with voltage or that residual capacity is little is little, comes thus voltage or the residual capacity of each battery module of equalization (1).
3. supply unit according to claim 1 and 2 is characterized in that,
Described control circuit (3) limits littlely than the discharging current limits value of the bidirectional transducer (2) that is connected with other battery module (1) by the discharging current limits value of the bidirectional transducer (2) that will battery module (1) minimum with voltage or that residual capacity is minimum be connected, discharge, come thus voltage or the residual capacity of each battery module of equalization (1).
4. each described supply unit is characterized in that according to claim 1～3,
Described control circuit (3) is according to the mode suitable with the ratio of the voltage of each battery module (1) or residual capacity, current limit value to the bidirectional transducer (2) that is connected with each battery module (1) is controlled, and comes voltage or the residual capacity of each battery module of equalization (1).
5. supply unit according to claim 1 and 2 is characterized in that,
The voltage of the battery module (1) that described control circuit (3) computing is whole or the mean value of residual capacity, the discharging current limits value of the bidirectional transducer (2) that will be connected with voltage or the residual capacity battery module (1) less than the mean value that calculates limits littlely than other the discharging current limits value of bidirectional transducer (2), comes voltage or the residual capacity of each battery module of equalization (1).
6. supply unit according to claim 5 is characterized in that,
The voltage of the battery module (1) that described control circuit (3) computing is whole or the mean value of residual capacity, the discharging current limits value of the bidirectional transducer (2) that will be connected with voltage or the residual capacity battery module (1) less than the mean value that calculates limits littlely than other the discharging current limits value of bidirectional transducer (2), and along with becoming large with the poor of mean value, the discharging current limits value of the bidirectional transducer (2) that will be connected with voltage or the residual capacity battery module (1) less than mean value limits littlely.
7. supply unit according to claim 1 and 2 is characterized in that,
The voltage of the battery module (1) that described control circuit (3) computing is whole or the mean value of residual capacity, the charge-current limit value of the bidirectional transducer (2) that will be connected with voltage or the residual capacity battery module (1) larger than the mean value that calculates limits littlely than other the charge-current limit value of bidirectional transducer (2), comes voltage or the residual capacity of each battery module of equalization (1).
8. supply unit according to claim 7 is characterized in that,
The voltage of the battery module (1) that described control circuit (3) computing is whole or the mean value of residual capacity, the charge-current limit value of the bidirectional transducer (2) that will be connected with voltage or the residual capacity battery module (1) larger than the mean value that calculates limits littlely than other the charge-current limit value of bidirectional transducer (2), and along with becoming large with the poor of mean value, the charge-current limit value of the bidirectional transducer (2) that will be connected with voltage or the residual capacity battery module (1) larger than mean value limits littlely.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-218101 | 2011-09-30 | ||
| JP2011218101A JP2013078242A (en) | 2011-09-30 | 2011-09-30 | Electric power supply device |
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| Publication Number | Publication Date |
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| CN103036268A true CN103036268A (en) | 2013-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210361900XA Pending CN103036268A (en) | 2011-09-30 | 2012-09-25 | Power supply device |
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| CN (1) | CN103036268A (en) |
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Application publication date: 20130410 |