CN204145029U - Battery equilibrium management circuit and system - Google Patents
Battery equilibrium management circuit and system Download PDFInfo
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- CN204145029U CN204145029U CN201420636393.0U CN201420636393U CN204145029U CN 204145029 U CN204145029 U CN 204145029U CN 201420636393 U CN201420636393 U CN 201420636393U CN 204145029 U CN204145029 U CN 204145029U
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Abstract
The utility model provides a kind of battery equilibrium management circuit of more piece battery core of connecting successively, and it comprises one or more balancing capacitance and detection control circuit.Described detection control electric circuit inspection also compares the battery core voltage of each battery core, when the difference of the battery core voltage finding that there is two battery cores exceedes predetermined balance discrepancy threshold, then by described balancing capacitance by lower for battery core voltage in the electric energy transfer of higher for battery core voltage in described two battery cores to described two battery cores one.Active battery core balance can be achieved like this, extend the useful life of battery.
Description
[technical field]
The utility model relates to field of power supplies, particularly a kind of battery equilibrium management circuit of more piece battery core and system.
[background technology]
Multiple batteries protect IC realizes various defencive function to battery: charging overvoltage protection, electric discharge overvoltage protection, electric discharge overcurrent protection, short-circuit protection etc.The general multiple batteries protection system referred to here is the system of more piece battery core series connection.High performance battery protection chip is also integrated with the function balanced battery core voltage.Reason is when after battery Long-Time Service, and because the core that often economizes on electricity exists certain manufacturing variation, after repeatedly charging and discharging, often economize on electricity between core voltage and can produce larger difference, some battery core voltage is higher, and some battery core voltage is lower.When a wherein economize on electricity core voltage is lower than electric discharge overvoltage threshold, and another economize on electricity core voltage higher than charging overvoltage threshold time.Now this battery can not charge and can not discharge, and is in the state of scrapping.If charged to this battery, then battery core voltage is caused to exceed the battery core blast of charging overvoltage threshold; If to this battery discharge, then battery core voltage is caused to damage lower than the battery core of electric discharge overvoltage threshold.Battery protecting circuit with battery core equilibrium function contributes to reducing the voltage differences between battery core, thus extends the battery of more piece battery core.
The prior art comparing extensive use is at present passive equilibrium strategy, and the battery core higher by battery core voltage carries out current limliting electric discharge, and this mode efficiency electric discharge causes these battery core energy to slattern completely, and is converted to bad heat, increases temperature in battery.And the strategy of passive equilibrium, because electric discharge is by current limliting (it is overheated to prevent), balanced capacity is limited, and after causing Long-Time Service, its life-span still exists reduction necessary scarcely.
Therefore, be necessary to provide a kind of technical scheme of improvement to overcome the problems referred to above.
[utility model content]
The purpose of this utility model is to provide a kind of battery equilibrium management circuit and system, and it initiatively can exceed predetermined two battery cores balancing discrepancy threshold to battery core voltage difference and carry out the balance of voltage, thus effectively can extend the life-span of battery.
In order to solve the problem, the utility model provides a kind of battery equilibrium management circuit of more piece battery core of connecting successively, and it comprises: one or more balancing capacitance; Detection control circuit, it detects and compares the battery core voltage of each battery core, when the difference of the battery core voltage finding that there is two battery cores exceedes predetermined balance discrepancy threshold, then by described balancing capacitance by lower for battery core voltage in the electric energy transfer of higher for battery core voltage in described two battery cores to described two battery cores one.
Further, described battery equilibrium management circuit also comprises: multipair gating switch, wherein often pair of corresponding battery core of gating switch and a balancing capacitance, and the both positive and negative polarity of the battery core of correspondence is connected to the two ends of corresponding balancing capacitance, each battery core corresponding a pair or two pairs of gating switches, the corresponding multipair gating switch of each balancing capacitance, often pair of gating switch comprises the first gating switch and the second gating switch, first link of the first gating switch is connected with the positive pole of corresponding battery core, second link of the first gating switch is connected with the first link of corresponding balancing capacitance, first link of the second gating switch is connected with the negative pole of corresponding battery core, second link of the second gating switch is connected with the second link of corresponding balancing capacitance, gate control circuit, it controls the first gating switch and the conducting simultaneously of the second gating switch in often pair of gating switch or turns off simultaneously, this battery core corresponding to gating switch to be connected in corresponding balancing capacitance or to disconnect this connection to battery core corresponding to gating switch and described balancing capacitance.
Further, described balancing capacitance is one, these two battery cores of what gate control circuit described in described detection control control circui replaced exceed the difference of battery core voltage predetermined balance discrepancy threshold are connected in described balancing capacitance, to realize the electric energy transfer of this two battery core by described balancing capacitance.
Further, described detection control circuit is when the difference of the battery core voltage finding that there is two battery cores exceedes predetermined balance discrepancy threshold, this situation is notified described gate control circuit, described gate control circuit one of first controlling in these two battery cores by controlling corresponding gating switch is connected in described balancing capacitance, make the voltage that the voltage between two of described balancing capacitance links equals between the both positive and negative polarity of the battery core be strobed, another controlling in these two battery cores is subsequently connected in described balancing capacitance, make the voltage that the voltage between two of described balancing capacitance links equals between the both positive and negative polarity of the battery core be strobed.
Further, synchronization only has a battery core to connect described balancing capacitance by a pair gating switch of its correspondence, when alternately these two battery cores being connected in described balancing capacitance, centre is provided with two battery cores and is all not attached to predetermined Dead Time in described balancing capacitance.
Further, described balancing capacitance is multiple, each balancing capacitance can be connected with the corresponding more piece battery core of connecting successively by gating switch, two adjacent balancing capacitances can be connected with corresponding same battery core by gating switch, described detection control circuit the difference of the battery core voltage finding that there is two battery cores exceed predetermined balance discrepancy threshold and this two battery cores corresponding same balancing capacitance time, then start battery equilibrium operation in level, in described level, battery equilibrium operation comprises: control these two battery cores difference of battery core voltage being exceeded predetermined balance discrepancy threshold that described gate control circuit replaces and be connected in this same balancing capacitance, to realize the electric energy transfer of this two battery core by this same balancing capacitance, described detection control circuit the difference of the battery core voltage finding that there is two battery cores exceed predetermined balance discrepancy threshold and this two battery cores not corresponding same balancing capacitance time, then start the operation of inter-stage battery equilibrium, described inter-stage battery equilibrium operation comprises: the balancing capacitance corresponding by these two battery cores and the balancing capacitance between these two battery cores and these by by the common corresponding battery core of balancing capacitance by lower for battery core voltage in the electric energy transfer of higher for battery core voltage in described two battery cores to described two battery cores one.
Further, described detection control circuit the difference of the battery core voltage finding that there is two battery cores exceed predetermined balance discrepancy threshold and this two battery cores not corresponding same balancing capacitance time, in two battery cores, high that of battery core voltage is called as high voltage battery core, in two battery cores, low that of battery core voltage is called as low-voltage battery core, the balancing capacitance of the close low-voltage battery core that high voltage battery core is corresponding is called as and initially shifts balancing capacitance, the balancing capacitance of the close high voltage battery core that low-voltage battery core is corresponding is called as and finally shifts balancing capacitance, balancing capacitance between initial transfer balancing capacitance and final transfer balancing capacitance is called as transfer balancing capacitance.Described inter-stage battery equilibrium operation comprises: by the energy transferring of high voltage battery core in initial transfer balancing capacitance; The energy initially shifted in balancing capacitance is passed in adjacent transfer balancing capacitance by common corresponding battery core; Energy in current transfer balancing capacitance is passed in adjacent next transfer balancing capacitance by common corresponding battery core, until energy is passed in final transfer balancing capacitance; By the energy transferring that finally shifts in balancing capacitance to low-voltage battery core.
Further, if initial transfer balancing capacitance is adjacent with finally shifting balancing capacitance, transfer balancing capacitance is not so then had.
According to another aspect of the present utility model, the utility model provides a kind of battery equilibrium management system, it comprises: multiple battery equilibrium management circuit, be responsible for the battery equilibrium management of the more piece battery core of connecting successively, wherein each battery equilibrium management circuit is responsible for the battery equilibrium management of the part battery core in the more piece battery core of connecting successively.Each battery equilibrium management circuit comprises: a balancing capacitance, multipair gating switch, wherein often pair of corresponding battery core of gating switch and a balancing capacitance, and the both positive and negative polarity of the battery core of correspondence is connected to the two ends of corresponding balancing capacitance, each battery core corresponding a pair or two pairs of gating switches, the corresponding multipair gating switch of each balancing capacitance, often pair of gating switch comprises the first gating switch and the second gating switch, first link of the first gating switch is connected with the positive pole of corresponding battery core, second link of the first gating switch is connected with the first link of corresponding balancing capacitance, first link of the second gating switch is connected with the negative pole of corresponding battery core, second link of the second gating switch is connected with the second link of corresponding balancing capacitance, gate control circuit, it controls the first gating switch and the conducting simultaneously of the second gating switch in often pair of gating switch or turns off simultaneously, this battery core corresponding to gating switch to be connected in corresponding balancing capacitance or to disconnect this connection to battery core corresponding to gating switch and described balancing capacitance, detection control circuit, it compares the battery core voltage of each battery core, when the difference of the battery core voltage finding that there is two battery cores exceedes predetermined balance discrepancy threshold, then by described balancing capacitance by lower for battery core voltage in the electric energy transfer of higher for battery core voltage in described two battery cores to described two battery cores one.
Further, each battery equilibrium management circuit includes communication module, the battery core voltage of the battery core that the battery core voltage of the battery core that affiliated battery equilibrium management circuit is responsible for by this communication module and other battery equilibrium management circuits received are responsible for passes to the detection control circuit of the battery equilibrium management circuit be adjacent, the detection control circuit of each like this battery equilibrium management circuit will understand that the battery core voltage condition of all battery cores, each balancing capacitance can be connected with the corresponding more piece battery core of connecting successively, two adjacent balancing capacitances can be connected with corresponding same battery core, the difference of the battery core voltage finding that there is two battery cores exceed predetermined balance discrepancy threshold and this two battery cores corresponding same balancing capacitance time, then start battery equilibrium operation in level, in described level, battery equilibrium operation comprises: control these two battery cores difference of battery core voltage being exceeded predetermined balance discrepancy threshold that described gate control circuit replaces and be connected in this same balancing capacitance, to realize the electric energy transfer of this two battery core by this same balancing capacitance, the difference of the battery core voltage finding that there is two battery cores exceed predetermined balance discrepancy threshold and this two battery cores not corresponding same balancing capacitance time, then start the operation of inter-stage battery equilibrium, described inter-stage battery equilibrium operation comprises: the balancing capacitance corresponding by these two battery cores and the balancing capacitance between these two battery cores and these by by the common corresponding battery core of balancing capacitance by lower for battery core voltage in the electric energy transfer of higher for battery core voltage in described two battery cores to described two battery cores one.
Further, described detection control circuit the difference of the battery core voltage finding that there is two battery cores exceed predetermined balance discrepancy threshold and this two battery cores not corresponding same balancing capacitance time, in two battery cores, high that of battery core voltage is called as high voltage battery core, in two battery cores, low that of battery core voltage is called as low-voltage battery core, the balancing capacitance of the close low-voltage battery core that high voltage battery core is corresponding is called as and initially shifts balancing capacitance, the balancing capacitance of the close high voltage battery core that low-voltage battery core is corresponding is called as and finally shifts balancing capacitance, balancing capacitance between initial transfer balancing capacitance and final transfer balancing capacitance is called as transfer balancing capacitance.Described inter-stage battery equilibrium operation comprises: by the energy transferring of high voltage battery core in initial transfer balancing capacitance; The energy initially shifted in balancing capacitance is passed in adjacent transfer balancing capacitance by common corresponding battery core; Energy in current transfer balancing capacitance is passed in adjacent next transfer balancing capacitance by common corresponding battery core, until energy is passed in final transfer balancing capacitance; By the energy transferring that finally shifts in balancing capacitance to low-voltage battery core.
Further, gating switch in each battery equilibrium management circuit is divided into grade internal gating switch and inter-stage gating switch, two level internal gating switches form a pair gating switch and are called a grade internal gating Switch Controller, two inter-stage gating switches form a pair gating switch and are called inter-stage gating switch pair, the two ends of the balancing capacitance of affiliated battery equilibrium management circuit are connected to the both positive and negative polarity of the battery core that affiliated battery equilibrium management circuit is responsible for by described level internal gating Switch Controller, the two ends of described inter-stage gating switch to the balancing capacitance by affiliated battery equilibrium management circuit are connected to the both positive and negative polarity of the battery core that another adjacent battery equilibrium management circuit is responsible for.Described inter-stage battery equilibrium operation comprises: the energy transferring of high voltage battery core shifts in balancing capacitance to initial by the level internal gating Switch Controller by correspondence; The energy initially shifted in balancing capacitance is passed in adjacent transfer balancing capacitance by common corresponding battery core to the level internal gating Switch Controller with correspondence by the inter-stage gating switch by correspondence; Energy in current transfer balancing capacitance is passed in adjacent next transfer balancing capacitance by common corresponding battery core the level internal gating Switch Controller with correspondence by the inter-stage gating switch by correspondence, until energy is passed in final transfer balancing capacitance; By the level internal gating Switch Controller of correspondence by the energy transferring that finally shifts in balancing capacitance to low-voltage battery core.
Compared with prior art, in the utility model when the difference of the battery core voltage finding that there is two battery cores exceedes predetermined balance discrepancy threshold, then by described balancing capacitance by lower for battery core voltage in the electric energy transfer of higher for battery core voltage in described two battery cores to described two battery cores one, thus active battery core balance can be achieved.
[accompanying drawing explanation]
In order to be illustrated more clearly in the technical scheme of the utility model embodiment, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.Wherein:
Fig. 1 is the battery equilibrium management circuit circuit diagram in one embodiment in the utility model;
Fig. 2 is the battery equilibrium management system circuit diagram in another embodiment in the utility model;
Fig. 3 is the battery equilibrium management system circuit diagram in another embodiment in the utility model.
[embodiment]
For enabling above-mentioned purpose of the present utility model, feature and advantage become apparent more, are described in further detail the utility model below in conjunction with the drawings and specific embodiments.
Fig. 1 is the battery equilibrium management circuit circuit diagram in one embodiment in the utility model.As shown in Figure 1, described battery equilibrium management circuit carries out management of balance to the battery core BATC1 connected successively, BATC2 and BATC3, and just example out three battery cores in figure, in fact can be more.
Described battery equilibrium management circuit 100 comprises a balancing capacitance CC, detection control circuit 110, gate control circuit 120 and multipair gating switch.
As shown in Figure 1, gating switch KC1 and gating switch KC6 is a pair, and gating switch KC2 and gating switch KC5 is a pair, and gating switch KC3 and gating switch KC4 is a pair.At least corresponding a pair gating switch of each battery core.Often pair of corresponding battery core of gating switch and a balancing capacitance, such as KC1 and KC6 corresponding battery core BATC3, corresponding balancing capacitance CC, the both positive and negative polarity of the battery core of correspondence is connected to the two ends of corresponding balancing capacitance by this to gating switch.Corresponding a pair gating switch of each battery core, the corresponding multipair gating switch of each balancing capacitance.Often pair of gating switch comprises the first gating switch KC1, KC2, KC3 and the second gating switch KC4, KC5, KC6, first gating switch KC1, KC2, first link and the corresponding battery core BATC3 of KC3, BATC2, the positive pole of BATC1 is connected, first gating switch KC1, KC2, second link of KC3 is connected with first link of described balancing capacitance CC, second gating switch KC4, KC5, first link and the corresponding battery core BATC1 of KC6, BATC2, the negative pole of BATC3 is connected, second gating switch KC4, KC5, second link of KC6 is connected with second link of described balancing capacitance CC.
Described gate control circuit 120 controls the first gating switch in often pair of gating switch and the conducting simultaneously of the second gating switch or turns off simultaneously, to be connected on described balancing capacitance CC by this battery core corresponding to gating switch or to disconnect this connection to battery core corresponding to gating switch and described balancing capacitance CC.Preferably, synchronization only has a battery core to connect described balancing capacitance by a pair gating switch of its correspondence.When alternately these two battery cores being connected on described balancing capacitance CC, centre is provided with two battery cores and is all not attached to predetermined Dead Time on described balancing capacitance CC.
Described detection control circuit 110 detects and compares the battery core voltage of each battery core, when the difference of the battery core voltage finding that there is two battery cores exceedes predetermined balance discrepancy threshold, then by described balancing capacitance CC by lower for battery core voltage in the electric energy transfer of higher for battery core voltage in described two battery cores to described two battery cores one.Concrete, described detection control circuit 110 is when the difference of the battery core voltage finding that there is two battery cores exceedes predetermined balance discrepancy threshold, this situation is notified described gate control circuit 120, described gate control circuit 120 one of first controlling in these two battery cores by controlling corresponding gating switch is connected in described balancing capacitance, make the voltage that the voltage between two of described balancing capacitance links equals between the both positive and negative polarity of the battery core be strobed, another controlling in these two battery cores is subsequently connected in described balancing capacitance, make the voltage that the voltage between two of described balancing capacitance links equals between the both positive and negative polarity of the battery core be strobed.By continuous repetitive operation, can by lower for battery core voltage in the electric energy transfer of higher for battery core voltage in described two battery cores to described two battery cores one by described balancing capacitance CC.
In a concrete application example, when detecting that the battery core voltage of BATC2 is the highest, the battery core voltage of BATC1 is minimum, if and the difference between the highest battery core voltage of voltage and the minimum battery core voltage of voltage exceedes default balance discrepancy threshold, will start the balance of voltage between BATC2 and BATC1.Now, gate control circuit 120 first allows GC2 and GC5 be high level, so that gating switch KC2 and KC5 conducting, make battery core BATC2 in parallel with electric capacity CC, now battery core BATC2 charges to electric capacity CC, duration will enough allow electric capacity CC voltage equal the voltage of BATC2, then control GC2 and GC5 is low level, so that gating switch KC2 and KC5 disconnects, after certain Dead Time, control GC3 and GC4 is high level, so that gating switch KC3 and KC4 conducting, make battery core BATC1 in parallel with electric capacity CC, now electric capacity CC is to battery core BATC1 charging (now electric capacity CA discharges), duration will enough allow electric capacity CC voltage equal the voltage of BATA1.So continuous repetition aforesaid operations (first allow BATC2 charge to electric capacity CC, then allow electric capacity CC charge to BATC1), after repeatedly repetitive operation, by equal for the voltage of the voltage with BATC1 that realize BATC2.
Fig. 2 is the battery equilibrium management system circuit diagram in another embodiment in the utility model.This balance of power level management system comprises multiple battery equilibrium management circuit, and in figure, example out 3, is respectively 210,220 and 230.Each battery equilibrium management circuit is responsible for the management of balance of multiple battery core of connecting successively, wherein out 3 battery cores in figure.Wherein battery equilibrium management circuit 210 is responsible for the management of balance of battery core BATA1, BATA2 and BATA3, battery equilibrium management circuit 220 is responsible for the management of balance of battery core BATB1, BATB2 and BATB3, and battery equilibrium management circuit 230 is responsible for the management of balance of battery core BATC1, BATC2 and BATC3.
Each battery equilibrium management circuit in Fig. 2 is substantially identical with the structure of the cell balancing circuit in Fig. 1, and described battery equilibrium management circuit 210 comprises a balancing capacitance CA, detection control circuit 211, gate control circuit 212 and multipair gating switch KA1, KA2, KA3, KA4, KA5, KA6.Wherein KA1 and KA6 is a pair, KA2 and KA5 be a pair, KA3 and KA4 is a pair.Described battery equilibrium management circuit 220 comprises a balancing capacitance CB, detection control circuit 221, gate control circuit 222 and multipair gating switch KB1, KB2, KB3, KB4, KB5, KB6.Wherein KB1 and KB6 is a pair, KB2 and KB5 be a pair, KB3 and KB4 is a pair.Described battery equilibrium management circuit 230 comprises a balancing capacitance CC, detection control circuit 231, gate control circuit 232 and multipair gating switch KC1, KC2, KC3, KC4, KC5, KC6.Wherein KC1 and KC6 is a pair, KC2 and KC5 be a pair, KC3 and KC4 is a pair.
A difference of each battery equilibrium management circuit in Fig. 2 and the cell balancing circuit in Fig. 1 is: each cell balancing circuit in Fig. 2 also comprises a pair extra inter-stage gating switch KCU1 and KCU2, KBU1 and KBU2, KAU1 and KAU2.This links together to the both positive and negative polarity of the battery core near present battery balancing circuitry that the two ends of the balancing capacitance in present battery balancing circuitry and adjacent cell balancing circuit are responsible for by inter-stage gating switch (or claim inter-stage gating switch to), such as inter-stage gating switch is connected the both positive and negative polarity of the battery core BATB1 that balancing capacitance CA and cell balancing circuit 220 are responsible for KAU1 with KAU2, and inter-stage gating switch is connected the both positive and negative polarity of balancing capacitance CB and the responsible battery core BATC1 of cell balancing circuit 230 to KBU1 with KBU2.As difference, gating switch KA1, KA2, KA3, KA4, KA5, KA6 also can be called as a grade internal gating switch, and a pair such gating switch is called as a grade internal gating Switch Controller.In this example, the corresponding two pairs of coupling cocks of battery core BATB1 are for a pair KB3 and KB4, for level internal gating switch, and this is connected balancing capacitance CB to gating switch KB3 with KB4, and another is to KAU1 and KAU2, for inter-stage gating switch, and this is connected balancing capacitance CA to gating switch KAU1 with KAU2.Battery core BATC1 is corresponding two pairs of coupling cocks also, and being for a pair KC3 and KC4, is level internal gating switch, and this is connected balancing capacitance CC to gating switch KC3 with KC4, another is to KBU1 and KBU2, be inter-stage gating switch, and this is connected balancing capacitance CB to gating switch KBU1 with KBU2.Wherein balancing capacitance CA and balancing capacitance CB can be called as balancing capacitance adjacent each other, and they are common corresponding same battery core BATB1.Same, balancing capacitance CB and balancing capacitance CC can be called as balancing capacitance adjacent each other, and they are common corresponding same battery core BATC1, and each balancing capacitance can be connected with the corresponding more piece battery core of connecting successively.Each balancing capacitance can be connected with more piece battery core by corresponding gating switch, and such as balancing capacitance CA can be connected with BATA1, BATA2, BATA3, BATB1.
Another difference of each battery equilibrium management circuit in Fig. 2 and the cell balancing circuit in Fig. 1 is: each battery equilibrium management circuit includes communication module 213,223 or 233, the battery core voltage of the battery core that the battery core voltage of the battery core that affiliated battery equilibrium management circuit is responsible for by this communication module and other battery equilibrium management circuits received are responsible for passes to the detection control circuit of the battery equilibrium management circuit be adjacent, and each like this detection control circuit will understand that the battery core voltage condition of all battery cores.Upload as by up link, by passing under dn linkage section.
Described detection control circuit 211,221 and/or 231 the difference of the battery core voltage finding that there is two battery cores exceed predetermined balance discrepancy threshold and this two battery cores corresponding same balancing capacitance time, then start battery equilibrium operation in level.In described level, battery equilibrium operation comprises: control these two battery cores difference of battery core voltage being exceeded predetermined balance discrepancy threshold that described gate control circuit replaces and be connected in this same balancing capacitance, to realize the electric energy transfer of this two battery core by this same balancing capacitance.Such as when detecting that the battery core voltage of BATC2 is the highest, the battery core voltage of BATC1 is minimum, if and the difference between the highest battery core voltage of voltage and the minimum battery core voltage of voltage exceedes default balance discrepancy threshold, they are corresponding same balancing capacitance CC, the electric energy transfer of this two battery core will be realized by this same balancing capacitance CC, concrete principle as described above, no longer repeats here.
Described detection control circuit 211,221 and/or 231 the difference of the battery core voltage finding that there is two battery cores exceed predetermined balance discrepancy threshold and this two battery cores not corresponding same balancing capacitance time, then start the operation of inter-stage battery equilibrium.The operation of described inter-stage battery equilibrium comprises: the balancing capacitance corresponding by these two battery cores and the balancing capacitance between these two battery cores and these by by the common corresponding battery core of balancing capacitance by lower for battery core voltage in the electric energy transfer of higher for battery core voltage in described two battery cores to described two battery cores one.Concrete, if the battery core voltage of BATC3 is high, the battery core voltage of BATA1 is low, both differences exceed predetermined balance discrepancy threshold, and the corresponding balancing capacitance CC of BATC3, the corresponding balancing capacitance CA of BATA1, so then start the battery equilibrium of inter-stage, namely by balancing capacitance CC corresponding to these two battery cores and CA, and the balancing capacitance CB between these two battery cores, and these by by balancing capacitance CC, the common corresponding battery core BATC1 of CB, BATB1 is by lower for battery core voltage in the electric energy transfer of higher for battery core voltage in a described two battery cores BATC3 to a described two battery cores BATA1.
In order to easy understand, the difference of the battery core voltage finding that there is two battery cores exceed predetermined balance discrepancy threshold and this two battery cores not corresponding same balancing capacitance time, in two battery cores, high that of battery core voltage is called as high voltage battery core, such as BATC3 is called as high voltage battery core, in two battery cores, low that of battery core voltage is called as low-voltage battery core, such as BATA1 is called as low-voltage battery core, the balancing capacitance of the close low-voltage battery core that high voltage battery core is corresponding is called as and initially shifts balancing capacitance, such as level electric capacity CC is called as and initially shifts balancing capacitance, the balancing capacitance of the close high voltage battery core that low-voltage battery core is corresponding is called as and finally shifts balancing capacitance, such as balancing capacitance CA is called as and finally shifts balancing capacitance, balancing capacitance between initial transfer balancing capacitance and final transfer balancing capacitance is called as transfer balancing capacitance, such as balancing capacitance CB is called as transfer balancing capacitance.So, described inter-stage battery equilibrium operation specifically comprises:
By level internal gating Switch Controller, the energy transferring of high voltage battery core is shifted in balancing capacitance to initial; Such as, the energy transferring on BATC3 is on balancing capacitance CC, and this is realized by gating switch;
By inter-stage gating switch to level internal gating Switch Controller, the energy initially shifted in balancing capacitance being passed in adjacent transfer balancing capacitance by common corresponding battery core; Such as, be passed on adjacent transfer balancing capacitance CB by battery core BATC1 by the energy on balancing capacitance CC, this is also realized by gating switch;
Energy in current transfer balancing capacitance is passed in adjacent next transfer balancing capacitance by common corresponding battery core to level internal gating Switch Controller by inter-stage gating switch, until energy is passed in final transfer balancing capacitance; Such as, be passed on final transfer balancing capacitance CA by battery core BATB1 by the energy on balancing capacitance CB, this is also realized by gating switch.It is to be understood that owing to only having a transfer balancing capacitance in the utility model, be therefore directly just delivered to final transfer balancing capacitance here, if there is multiple transfer balancing capacitance, then there is repeatedly the energy transferring between adjacent transfer balancing capacitance;
By level internal gating Switch Controller by the energy transferring that finally shifts in balancing capacitance to low-voltage battery core; Such as by the energy transferring on balancing capacitance CA on battery core BATA1;
By continuous repetition, the voltage of low-voltage battery core can be made identical with the voltage of high voltage battery core, and the voltage of such as BATC3 is equal with the voltage of BATA1.
In addition, in one embodiment, if initial transfer balancing capacitance is adjacent with finally shifting balancing capacitance, transfer balancing capacitance is not so then had.Described inter-stage battery equilibrium operation then can become: by the energy transferring of high voltage battery core in initial transfer balancing capacitance; The energy initially shifted in balancing capacitance is passed in final transfer balancing capacitance by common corresponding battery core; By the energy transferring that finally shifts in balancing capacitance to low-voltage battery core.
In one embodiment, each battery equilibrium management circuit 210,220 and 230 in Fig. 2 is chips, and each chip is responsible for the management of several battery core.In another embodiment, described multiple battery equilibrium management circuits 210,220 and 230 in Fig. 2 can be arranged in a chip, namely same battery management circuit is formed, communication module can be saved like this, only retain a gate control circuit and detection control circuit, and this detection control circuit carries out voltage detecting to all battery cores, described gate control circuit controls gating switch all.Now, battery equilibrium operation and the operation of inter-stage battery equilibrium in above-described level can be adopted equally to carry out battery equilibrium management, and principle is identical.
Enumerate a concrete example below, systems axiol-ogy is the highest to the voltage of BATC3, and the voltage of BATA1 is minimum, and voltage difference has between the two exceeded balance discrepancy threshold, then need to carry out the balance of voltage to BATC3 and BATA1.Circuit 230 for most higher level can control as follows: can control first to allow KC1 and KC6 conducting simultaneously, now BATC3 charges to electric capacity CC; Allow KC3 and KC4 simultaneously conducting, allow electric capacity CC be BATC1 charging; Alternately repeat above-mentioned steps.Circuit 220 for centre can control as follows: can control first to allow KBU1 and KBU2 conducting simultaneously, now BATC1 charges to electric capacity CB; Allow KB3 and KB4 simultaneously conducting, allow electric capacity CB be BATB1 charging; Alternately repeat above-mentioned steps.Can control as follows for the circuit 210: can control first to allow KAU1 and KAU2 conducting simultaneously, now BATB1 charges to electric capacity CA; Allow KA3 and KA4 simultaneously conducting, allow electric capacity CA be BATA1 charging; Alternately repeat above-mentioned steps.
In a preferred embodiment, different gating switches in same circuit are to can not simultaneously conducting, and when controlling different gating switch to alternate conduction, different gating switch exists certain Dead Time to needing between conducting, Dead Time can design very little, but needs to be greater than 0.Efficiency losses unnecessary during conducting while of avoiding like this.
Fig. 3 is the battery equilibrium management system circuit diagram in another embodiment in the utility model.Battery equilibrium management system in Fig. 3 is from the difference of the battery equilibrium management system in Fig. 2: position and the annexation of the gating switch of the extra inter-stage in each battery equilibrium management circuit 210,220 and 230 are different.In figure 3, inter-stage gating switch in battery equilibrium management circuit 230 is the first gating switch KCD1 and the second gating switch KCD2, this is connected to the positive and negative end of the battery core BATB3 that the two ends of balancing capacitance CC are responsible for battery equilibrium management circuit 220 by gating switch respectively, inter-stage gating switch in battery equilibrium management circuit 220 is the first gating switch KBD1 and the second gating switch KBD2, this is connected to the positive and negative end of the battery core BATA3 that the two ends of balancing capacitance CB are responsible for battery equilibrium management circuit 210 by gating switch respectively, inter-stage gating switch in battery equilibrium management circuit 210 is the first gating switch KAD1 and the second gating switch KAD2, this is connected to the positive and negative end of the battery core that the two ends of balancing capacitance CA are responsible for ensuing battery equilibrium management circuit by gating switch.All the other operation principles are identical with the battery equilibrium management system in Fig. 2, no longer repeat herein.
In the utility model, " connection ", be connected, word that " companys ", the expression such as " connecing " are electrical connected, if no special instructions, then represent direct or indirect electric connection.
It is pointed out that the scope be familiar with person skilled in art and any change that embodiment of the present utility model is done all do not departed to claims of the present utility model.Correspondingly, the scope of claim of the present utility model is also not limited only to previous embodiment.
Claims (10)
1. a battery equilibrium management circuit for the more piece battery core of connecting successively, it is characterized in that, it comprises:
One or more balancing capacitance;
Detection control circuit, it detects and compares the battery core voltage of each battery core, when the difference of the battery core voltage finding that there is two battery cores exceedes predetermined balance discrepancy threshold, then by described balancing capacitance by lower for battery core voltage in the electric energy transfer of higher for battery core voltage in described two battery cores to described two battery cores one.
2. battery equilibrium management circuit according to claim 1, it is characterized in that, it also comprises:
Multipair gating switch, wherein often pair of corresponding battery core of gating switch and a balancing capacitance, and the both positive and negative polarity of the battery core of correspondence is connected to the two ends of corresponding balancing capacitance, each battery core corresponding a pair or two pairs of gating switches, the corresponding multipair gating switch of each balancing capacitance, often pair of gating switch comprises the first gating switch and the second gating switch, first link of the first gating switch is connected with the positive pole of corresponding battery core, second link of the first gating switch is connected with the first link of corresponding balancing capacitance, first link of the second gating switch is connected with the negative pole of corresponding battery core, second link of the second gating switch is connected with the second link of corresponding balancing capacitance,
Gate control circuit, it controls the first gating switch and the conducting simultaneously of the second gating switch in often pair of gating switch or turns off simultaneously, this battery core corresponding to gating switch to be connected in corresponding balancing capacitance or to disconnect this connection to battery core corresponding to gating switch and described balancing capacitance.
3. battery equilibrium management circuit according to claim 2, it is characterized in that, described balancing capacitance is one, these two battery cores of what gate control circuit described in described detection control control circui replaced exceed the difference of battery core voltage predetermined balance discrepancy threshold are connected in described balancing capacitance, to realize the electric energy transfer of this two battery core by described balancing capacitance.
4. battery equilibrium management circuit according to claim 3, it is characterized in that, described detection control circuit is when the difference of the battery core voltage finding that there is two battery cores exceedes predetermined balance discrepancy threshold, this situation is notified described gate control circuit, described gate control circuit one of first controlling in these two battery cores by controlling corresponding gating switch is connected in described balancing capacitance, make the voltage that the voltage between two of described balancing capacitance links equals between the both positive and negative polarity of the battery core be strobed, another controlling in these two battery cores is subsequently connected in described balancing capacitance, make the voltage that the voltage between two of described balancing capacitance links equals between the both positive and negative polarity of the battery core be strobed.
5. battery equilibrium management circuit according to claim 3, is characterized in that, synchronization only has a battery core to connect described balancing capacitance by a pair gating switch of its correspondence,
When alternately these two battery cores being connected in described balancing capacitance, centre is provided with two battery cores and is all not attached to predetermined Dead Time in described balancing capacitance.
6. battery equilibrium management circuit according to claim 2, is characterized in that, described balancing capacitance is multiple, and each balancing capacitance can be connected with the corresponding more piece battery core of connecting successively by gating switch,
Two adjacent balancing capacitances can be connected with corresponding same battery core by gating switch,
Described detection control circuit the difference of the battery core voltage finding that there is two battery cores exceed predetermined balance discrepancy threshold and this two battery cores corresponding same balancing capacitance time, then start battery equilibrium operation in level, in described level, battery equilibrium operation comprises: control these two battery cores difference of battery core voltage being exceeded predetermined balance discrepancy threshold that described gate control circuit replaces and be connected in this same balancing capacitance, to realize the electric energy transfer of this two battery core by this same balancing capacitance;
Described detection control circuit the difference of the battery core voltage finding that there is two battery cores exceed predetermined balance discrepancy threshold and this two battery cores not corresponding same balancing capacitance time, then start the operation of inter-stage battery equilibrium, described inter-stage battery equilibrium operation comprises: the balancing capacitance corresponding by these two battery cores and the balancing capacitance between these two battery cores and these by by the common corresponding battery core of balancing capacitance by lower for battery core voltage in the electric energy transfer of higher for battery core voltage in described two battery cores to described two battery cores one.
7. battery equilibrium management circuit according to claim 6, it is characterized in that, described detection control circuit the difference of the battery core voltage finding that there is two battery cores exceed predetermined balance discrepancy threshold and this two battery cores not corresponding same balancing capacitance time, in two battery cores, high that of battery core voltage is called as high voltage battery core, in two battery cores, low that of battery core voltage is called as low-voltage battery core, the balancing capacitance of the close low-voltage battery core that high voltage battery core is corresponding is called as and initially shifts balancing capacitance, the balancing capacitance of the close high voltage battery core that low-voltage battery core is corresponding is called as and finally shifts balancing capacitance, balancing capacitance between initial transfer balancing capacitance and final transfer balancing capacitance is called as transfer balancing capacitance,
Described inter-stage battery equilibrium operation comprises:
By the energy transferring of high voltage battery core in initial transfer balancing capacitance;
The energy initially shifted in balancing capacitance is passed in adjacent transfer balancing capacitance by common corresponding battery core;
Energy in current transfer balancing capacitance is passed in adjacent next transfer balancing capacitance by common corresponding battery core, until energy is passed in final transfer balancing capacitance;
By the energy transferring that finally shifts in balancing capacitance to low-voltage battery core.
8. battery equilibrium management circuit according to claim 7, is characterized in that, if initial transfer balancing capacitance is adjacent with finally shifting balancing capacitance, does not so then have transfer balancing capacitance.
9. a battery equilibrium management system, it is characterized in that, it comprises: multiple battery equilibrium management circuit, is responsible for the battery equilibrium management of the more piece battery core of connecting successively, wherein each battery equilibrium management circuit is responsible for the battery equilibrium management of the part battery core in the more piece battery core of connecting successively
Each battery equilibrium management circuit comprises:
A balancing capacitance;
Multipair gating switch, wherein often pair of corresponding battery core of gating switch and a balancing capacitance, and the both positive and negative polarity of the battery core of correspondence is connected to the two ends of corresponding balancing capacitance, each battery core corresponding a pair or two pairs of gating switches, the corresponding multipair gating switch of each balancing capacitance, often pair of gating switch comprises the first gating switch and the second gating switch, first link of the first gating switch is connected with the positive pole of corresponding battery core, second link of the first gating switch is connected with the first link of corresponding balancing capacitance, first link of the second gating switch is connected with the negative pole of corresponding battery core, second link of the second gating switch is connected with the second link of corresponding balancing capacitance,
Gate control circuit, it controls the first gating switch and the conducting simultaneously of the second gating switch in often pair of gating switch or turns off simultaneously, this battery core corresponding to gating switch to be connected in corresponding balancing capacitance or to disconnect this connection to battery core corresponding to gating switch and described balancing capacitance;
Detection control circuit, it compares the battery core voltage of each battery core, when the difference of the battery core voltage finding that there is two battery cores exceedes predetermined balance discrepancy threshold, then by described balancing capacitance by lower for battery core voltage in the electric energy transfer of higher for battery core voltage in described two battery cores to described two battery cores one.
10. battery equilibrium management system according to claim 9, it is characterized in that, each battery equilibrium management circuit includes communication module, the battery core voltage of the battery core that the battery core voltage of the battery core that affiliated battery equilibrium management circuit is responsible for by this communication module and other battery equilibrium management circuits received are responsible for passes to the detection control circuit of the battery equilibrium management circuit be adjacent, the detection control circuit of each like this battery equilibrium management circuit will understand that the battery core voltage condition of all battery cores
Each balancing capacitance can be connected with the corresponding more piece battery core of connecting successively, and two adjacent balancing capacitances can be connected with corresponding same battery core,
The difference of the battery core voltage finding that there is two battery cores exceed predetermined balance discrepancy threshold and this two battery cores corresponding same balancing capacitance time, then start battery equilibrium operation in level, in described level, battery equilibrium operation comprises: control these two battery cores difference of battery core voltage being exceeded predetermined balance discrepancy threshold that described gate control circuit replaces and be connected in this same balancing capacitance, to realize the electric energy transfer of this two battery core by this same balancing capacitance;
The difference of the battery core voltage finding that there is two battery cores exceed predetermined balance discrepancy threshold and this two battery cores not corresponding same balancing capacitance time, then start the operation of inter-stage battery equilibrium, described inter-stage battery equilibrium operation comprises: the balancing capacitance corresponding by these two battery cores and the balancing capacitance between these two battery cores and these by by the common corresponding battery core of balancing capacitance by lower for battery core voltage in the electric energy transfer of higher for battery core voltage in described two battery cores to described two battery cores one.
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| CN201420636393.0U CN204145029U (en) | 2014-10-29 | 2014-10-29 | Battery equilibrium management circuit and system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104659870A (en) * | 2014-10-29 | 2015-05-27 | 无锡中星微电子有限公司 | Battery balance management circuit and system |
| US10790678B2 (en) | 2015-12-31 | 2020-09-29 | SZ DJI Technology Co., Ltd. | Method and system for balancing a battery assembly |
-
2014
- 2014-10-29 CN CN201420636393.0U patent/CN204145029U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104659870A (en) * | 2014-10-29 | 2015-05-27 | 无锡中星微电子有限公司 | Battery balance management circuit and system |
| CN104659870B (en) * | 2014-10-29 | 2017-02-15 | 无锡中星微电子有限公司 | battery balance management circuit and system |
| US10790678B2 (en) | 2015-12-31 | 2020-09-29 | SZ DJI Technology Co., Ltd. | Method and system for balancing a battery assembly |
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