CN104659870B - battery balance management circuit and system - Google Patents
battery balance management circuit and system Download PDFInfo
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- CN104659870B CN104659870B CN201410594945.0A CN201410594945A CN104659870B CN 104659870 B CN104659870 B CN 104659870B CN 201410594945 A CN201410594945 A CN 201410594945A CN 104659870 B CN104659870 B CN 104659870B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0016—Circuits for equalisation of charge between batteries using shunting, discharge or bypass circuits
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a battery balance management circuit for a plurality of battery cells which are connected in series in sequence. The battery balance management circuit comprises one or more balance capacitors and a detection control circuit, wherein the detection control circuit detects and compares the battery cell voltages of various battery cells; when the difference value of the battery cell voltages of the two battery cells exceeds a preset balance difference threshold value, the electric energy of the battery cell with higher battery cell voltage of the two battery cells is transferred to the battery cell with lower battery cell voltage of the two battery cells by virtue of the balance capacitor. Active battery cell balance is realized, and the service life of a battery is prolonged.
Description
【Technical field】
The present invention relates to field of power supplies, the battery equilibrium management circuit particularly to a kind of more piece battery core and system.
【Background technology】
Multiple batteries protection chip realizes various defencive functions to battery：Charging overvoltage protection, electric discharge overvoltage protection, electric discharge
Overcurrent protection, short-circuit protection etc..The system that the multiple batteries protection system typically herein referring to is connected for more piece battery core.High performance
Battery protection chip is also integrated with the function that battery core voltage is balanced.Reason is after battery life-time service, due to every
There is certain manufacturing variation in economize on electricity core, after multiple charging and discharging, often can produce larger difference between economize on electricity core voltage,
Some battery core voltage is higher, and some battery core voltages are relatively low.When wherein one economize on electricity core voltage is less than electric discharge overvoltage threshold, and another
When economize on electricity core voltage is higher than charging overvoltage threshold.Now this battery can neither charge nor discharge, and be in the state of scrapping.If
This battery is charged, then leads to battery core voltage to exceed the battery core blast of charging overvoltage threshold；If to this battery discharge, led
Send a telegraph the battery core damage that core voltage is less than electric discharge overvoltage threshold.Battery protecting circuit with battery core equilibrium function contributes to reducing electricity
Voltage differences between core, thus extend the battery of more piece battery core.
Relatively wide variety of prior art is passive equilibrium strategy at present, will the higher battery core of battery core voltage be limited
Banish electricity, this mode efficiency electric discharge leads to these battery core energy to slattern completely, and is converted to bad heat, increases battery
Interior temperature.And the strategy of passive equilibrium, because electric discharge is by current limliting (it is overheated to prevent), balanced capacity is limited, leads to life-time service
Afterwards, its life-span still suffers from necessarily unnecessary reduction.
Therefore, it is necessary to provide a kind of improved technical scheme to overcome the problems referred to above.
【Content of the invention】
It is an object of the invention to provide a kind of battery equilibrium management circuit and system, it can be actively to battery core voltage difference
Two battery cores exceeding predetermined balance discrepancy threshold carry out the balance of voltage, such that it is able to effectively extend the life-span of battery.
In order to solve the above problems, the present invention provides a kind of battery equilibrium management circuit of more piece battery core being sequentially connected in series,
It includes：One or more balancing capacitances；Detection control circuit, it detects and compares the battery core voltage of each battery core, is finding
When the difference having the battery core voltage of two battery cores exceedes predetermined balance discrepancy threshold, then will be described two by described balancing capacitance
On that in the electric energy transfer of that in battery core, battery core voltage is higher extremely described two battery cores, battery core voltage is relatively low.
Further, described battery equilibrium management circuit also includes：Multipair gating switch, wherein each pair gating switch correspond to
One battery core and a balancing capacitance, and the both positive and negative polarity of corresponding battery core is connected to the two ends of corresponding balancing capacitance, each
Battery core corresponds to a pair or two pairs of gating switches, and each balancing capacitance corresponds to multipair gating switch, and each pair gating switch includes first
Gating switch and the second gating switch, the first connection end of the first gating switch is connected with the positive pole of corresponding battery core, the first choosing
Open up the second connection end of pass and the first connection end of corresponding balancing capacitance to be connected, the first connection end of the second gating switch with
The negative pole of corresponding battery core is connected, the second connection end phase of the second connection end of the second gating switch and corresponding balancing capacitance
Even；Gate control circuit, the first gating switch in its control each pair gating switch and the second gating switch simultaneously turn on or same
When turn off, by this to gating switch corresponding battery core connect to corresponding balancing capacitance or disconnect this to gating switch correspond to
Battery core and described balancing capacitance connection.
Further, described balancing capacitance is one, and described detection control circuit controls described gate control circuit to replace
The difference by battery core voltage exceed this two battery cores of predetermined balance discrepancy threshold and connect to described balancing capacitance, with by
Described balancing capacitance realizes the electric energy transfer of this two battery core.
Further, described detection control circuit exceedes predetermined balance in the difference finding the battery core voltage having two battery cores
During discrepancy threshold, this situation is notified described gate control circuit, described gate control circuit is opened by controlling corresponding gating
Close first control one of this two battery cores to connect to described balancing capacitance so that described balancing capacitance two connection ends it
Between voltage be equal to voltage between the both positive and negative polarity of battery core that is strobed, subsequently control in this two battery cores another connect to
So that the voltage between the two of described balancing capacitance connection ends is equal to the both positive and negative polarity of the battery core being strobed in described balancing capacitance
Between voltage.
Further, synchronization only one of which battery core connects described balance electricity by its corresponding a pair of gating switch
Hold, when alternately connecting this two battery cores to described balancing capacitance, it is described that middle setting has two battery cores to be all not attached to
Predetermined Dead Time in balancing capacitance.
Further, described balancing capacitance be multiple, each balancing capacitance can by gating switch with corresponding successively
The more piece battery core of series connection is connected, and two adjacent balancing capacitances can be connected with corresponding same battery core by gating switch,
Described detection control circuit exceedes predetermined balance discrepancy threshold and this two in the difference finding the battery core voltage having two battery cores
During the corresponding same balancing capacitance of battery core, then start battery equilibrium operation in level, battery equilibrium operation in described level includes：Control
This two battery cores that the difference of battery core voltage is alternately exceeded predetermined balance discrepancy threshold by described gate control circuit connect to
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 finding the battery core voltage having two battery cores exceed predetermined balance discrepancy threshold and this two battery cores do not correspond to same
During balancing capacitance, then start battery equilibrium operation between level, battery equilibrium operation between described level includes：Correspond to by this two battery cores
Balancing capacitance and be located at this two battery cores between balancing capacitance and these by by balancing capacitance jointly correspond to
Battery core by the electric energy transfer of higher for battery core voltage in described two battery cores to battery core voltage in described two battery cores relatively
On low one.
Further, described detection control circuit exceedes predetermined balance in the difference finding the battery core voltage having two battery cores
Discrepancy threshold and when this two battery cores do not correspond to same balancing capacitance, that in two battery cores, battery core voltage is high is referred to as height
Voltage battery core, that in two battery cores, battery core voltage is low is referred to as low-voltage battery core, the corresponding close low electricity of high voltage battery core
The balancing capacitance of piezoelectricity core is referred to as initially shifting balancing capacitance, the corresponding balance electricity near high voltage battery core of low-voltage battery core
Hold and be referred to as finally shifting balancing capacitance, the balancing capacitance between initial transfer balancing capacitance and final transfer balancing capacitance is claimed
For transfer balancing capacitance.Between described level, battery equilibrium operation includes：By the energy transmission of high voltage battery core to initial transfer balance
On electric capacity；Energy in initial transfer balancing capacitance is transferred to adjacent transfer balancing capacitance by corresponding battery core jointly
On；Energy in current transfer balancing capacitance is transferred to adjacent next transfer balancing capacitance by corresponding battery core jointly
On, until energy is passed in final transfer balancing capacitance；By the energy transmission in final transfer balancing capacitance to low-voltage
Battery core.
Further, if initially transfer balancing capacitance is adjacent with final transfer balancing capacitance, then in then not having
Turn balancing capacitance.
According to another aspect of the present invention, the present invention provides a kind of battery equilibrium management system, and it includes：Multiple batteries
Management of balance circuit, the battery equilibrium management of the more piece battery core being responsible for being sequentially connected in series, wherein each battery equilibrium management circuit are born
Blame the battery equilibrium management of the part battery core in the more piece battery core being sequentially connected in series.Each battery equilibrium management circuit includes：One
Balancing capacitance；The corresponding battery core of multipair gating switch, wherein each pair gating switch and a balancing capacitance, and by corresponding electricity
The both positive and negative polarity of core connects to the two ends of corresponding balancing capacitance, and each battery core corresponds to a pair or two pairs of gating switches, each balance
Electric capacity corresponds to multipair gating switch, and each pair gating switch includes the first gating switch and the second gating switch, the first gating switch
The positive pole of the first connection end and corresponding battery core be connected, the second connection end of the first gating switch and corresponding balancing capacitance
First connection end is connected, and the first connection end of the second gating switch is connected with the negative pole of corresponding battery core, the second gating switch
Second connection end is connected with the second connection end of corresponding balancing capacitance；Gate control circuit, it controls in each pair gating switch
The first gating switch and the second gating switch simultaneously turn on or simultaneously turn off, by this, to gating switch, corresponding battery core connects
To in corresponding balancing capacitance or disconnect the connection of this corresponding battery core and described balancing capacitance to gating switch；Detection controls electricity
Road, it compares the battery core voltage of each battery core, exceedes predetermined balance difference in the difference finding the battery core voltage having two battery cores
During threshold value, then by described balancing capacitance by the electric energy transfer of higher for battery core voltage in described two battery cores to described two
On that in individual battery core, battery core voltage is relatively low.
Further, each battery equilibrium management circuit includes communication module, and affiliated battery is put down by this communication module
The battery core voltage of battery core that weighing apparatus management circuit is responsible for and other battery equilibriums of receiving manage the electricity of the battery core that circuit is responsible for
Core voltage passes to the detection control circuit that the battery equilibrium being adjacent manages circuit, so each battery equilibrium management circuit
Detection control circuit will understand that the battery core voltage condition of all battery cores, each balancing capacitance can be sequentially connected in series with corresponding
More piece battery core be connected, adjacent two balancing capacitances can be connected with corresponding same battery core, is finding there are two battery cores
The difference of battery core voltage when exceeding predetermined balance discrepancy threshold and the corresponding same balancing capacitance of this two battery cores, then start level
Interior battery equilibrium operation, battery equilibrium operation in described level includes：Control described gate control circuit alternately by battery core voltage
Difference exceed this two battery cores of predetermined balance discrepancy threshold and connect to this same balancing capacitance, with by this same balance
Electric capacity realizes the electric energy transfer of this two battery core；Exceed predetermined balance difference threshold in the difference finding the battery core voltage having two battery cores
Value and when this two battery cores do not correspond to same balancing capacitance, then start battery equilibrium operation, battery equilibrium between described level between level
Operation includes：By this corresponding balancing capacitance of two battery cores and be located at this two battery cores between balancing capacitance and this
A bit by by balancing capacitance jointly corresponding battery core by the electric energy transfer of higher for battery core voltage in described two battery cores
On battery core voltage is relatively low to described two battery cores one.
Further, described detection control circuit exceedes predetermined balance in the difference finding the battery core voltage having two battery cores
Discrepancy threshold and when this two battery cores do not correspond to same balancing capacitance, that in two battery cores, battery core voltage is high is referred to as height
Voltage battery core, that in two battery cores, battery core voltage is low is referred to as low-voltage battery core, the corresponding close low electricity of high voltage battery core
The balancing capacitance of piezoelectricity core is referred to as initially shifting balancing capacitance, the corresponding balance electricity near high voltage battery core of low-voltage battery core
Hold and be referred to as finally shifting balancing capacitance, the balancing capacitance between initial transfer balancing capacitance and final transfer balancing capacitance is claimed
For transfer balancing capacitance.Between described level, battery equilibrium operation includes：By the energy transmission of high voltage battery core to initial transfer balance
On electric capacity；Energy in initial transfer balancing capacitance is transferred to adjacent transfer balancing capacitance by corresponding battery core jointly
On；Energy in current transfer balancing capacitance is transferred to adjacent next transfer balancing capacitance by corresponding battery core jointly
On, until energy is passed in final transfer balancing capacitance；By the energy transmission in final transfer balancing capacitance to low-voltage
Battery core.
Further, the gating switch that each battery equilibrium manages in circuit is divided into grade internal gating and switchs gating and between level
Switch, two level internal gating switch a pair of gating switch of formation referred to as level internal gating switches are right, and between two levels, gating switch is formed
A pair of gating switch is referred to as gating switch pair between level, and described level internal gating switch manages the flat of circuit to by affiliated battery equilibrium
The two ends of weighing apparatus electric capacity connect to affiliated battery equilibrium the both positive and negative polarity managing the battery core that circuit is responsible for, and between described level, gating is opened
Close the two ends to the balancing capacitance that affiliated battery equilibrium manages circuit to connect to another adjacent battery equilibrium management electricity
The both positive and negative polarity of the battery core that road is responsible for.Between described level, battery equilibrium operation includes：By corresponding level internal gating switch to general
The energy transmission of high voltage battery core is to initial transfer balancing capacitance；Between by corresponding level gating switch to corresponding level in
Gating switch is transferred to adjacent transfer balance electricity to by the energy in initial transfer balancing capacitance by corresponding battery core jointly
Rong Shang；Between by corresponding level gating switch to corresponding level internal gating switch to by the energy in current transfer balancing capacitance
It is transferred in adjacent next transfer balancing capacitance by corresponding battery core jointly, put down until energy is passed to final transfer
On weighing apparatus electric capacity；By corresponding level internal gating switch to the energy transmission finally being shifted in balancing capacitance to low-voltage battery core.
Compared with prior art, exceed predetermined balanced differences in the difference finding the battery core voltage having two battery cores in the present invention
During different threshold value, then can by described balancing capacitance by the electric energy transfer of higher for battery core voltage in described two battery cores extremely
On that in described two battery cores, battery core voltage is relatively low, it is achieved thereby that active battery core balance.
【Brief description】
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below will be to required use in embodiment description
Accompanying drawing be briefly described it should be apparent that, drawings in the following description are only some embodiments of the present invention, for this
For the those of ordinary skill of field, without having to pay creative labor, other can also be obtained according to these accompanying drawings
Accompanying drawing.Wherein：
Fig. 1 is the battery equilibrium management circuit circuit diagram in one embodiment in the present invention；
Fig. 2 circuit diagram in another embodiment for the battery equilibrium management system in the present invention；
Fig. 3 circuit diagram in another embodiment for the battery equilibrium management system in the present invention.
【Specific embodiment】
Understandable for enabling the above objects, features and advantages of the present invention to become apparent from, below in conjunction with the accompanying drawings and specifically real
The present invention is further detailed explanation to apply mode.
Fig. 1 is the battery equilibrium management circuit circuit diagram in one embodiment in the present invention.As shown in figure 1,
Described battery equilibrium management circuit is balanced to battery core BATC1, BATC2 being sequentially connected in series and BATC3 managing, and in figure is simply shown
Example out three battery cores, can essentially more.
Described battery equilibrium management circuit 100 includes balancing capacitance CC, detection control circuit 110, gating control electricity
Road 120 and multipair gating switch.
As shown in figure 1, gating switch KC1 and gating switch KC6 is a pair, gating switch KC2 and gating switch KC5 is one
Right, gating switch KC3 and gating switch KC4 is a pair.Each battery core at least corresponds to a pair of gating switch.Each pair gating switch pair
Answer a battery core and a balancing capacitance, corresponding battery core BATC3 of such as KC1 with KC6, corresponding balancing capacitance CC, this is opened to gating
Close the two ends both positive and negative polarity of corresponding battery core being connected to corresponding balancing capacitance.Each battery core corresponds to a pair of gating switch, often
Individual balancing capacitance corresponds to multipair gating switch.Each pair gating switch includes first gating switch KC1, KC2, KC3 and second gating
Switch KC4, KC5, KC6, first connection end of first gating switch KC1, KC2, KC3 and corresponding battery core BATC3, BATC2,
The positive pole of BATC1 is connected, and second connection end of first gating switch KC1, KC2, KC3 is connected with the first of described balancing capacitance CC
End is connected, first connection end of second gating switch KC4, KC5, KC6 and the negative pole of corresponding battery core BATC1, BATC2, BATC3
It is connected, second connection end of second gating switch KC4, KC5, KC6 is connected with the second connection end of described balancing capacitance CC.
The first gating switch in described gate control circuit 120 control each pair gating switch and the second gating switch are simultaneously
Turn on or simultaneously turn off, corresponding battery core connects to described balancing capacitance CC or disconnects this to gating to gating switch by this
Switch the connection of corresponding battery core and described balancing capacitance CC.Preferably, synchronization only one of which battery core is corresponding by it
A pair of gating switch connects described balancing capacitance.When alternately connecting this two battery cores to described balancing capacitance CC, middle
It is provided with two battery cores and be all not attached to the predetermined Dead Time in described balancing capacitance CC.
Described detection control circuit 110 detects and compares the battery core voltage of each battery core have the electricity of two battery cores in discovery
When the difference of core voltage exceedes predetermined balance discrepancy threshold, then by described balancing capacitance CC, battery core in described two battery cores is electric
Press on that in electric energy transfer extremely described two battery cores of higher one, battery core voltage is relatively low.Specifically, described detection control
Circuit 110 processed, when the difference finding the battery core voltage having two battery cores exceedes predetermined balance discrepancy threshold, this situation is notified
Described gate control circuit 120, described gate control circuit 120 passes through to control corresponding gating switch first to control this two battery cores
One of connect to described balancing capacitance so that voltage between two connection ends of described balancing capacitance is equal to is strobed
The both positive and negative polarity of battery core between voltage, another subsequently controlling in this two battery cores connects to described balancing capacitance, makes
Obtain the voltage that the voltage between two connection ends of described balancing capacitance is equal between the both positive and negative polarity of battery core being strobed.By not
The electric energy of higher for battery core voltage in described two battery cores one can be turned by disconnected repetitive operation by described balancing capacitance CC
Move on relatively low one of battery core voltage in described two battery cores.
In a specific application example, when the battery core voltage highest detecting BATC2, the battery core voltage of BATC1 is
Low, and if the difference between voltage highest battery core voltage and the minimum battery core voltage of voltage exceedes default balance difference threshold
Value, will start the balance of voltage between BATC2 and BATC1.Now, gate control circuit 120 first allows GC2 and GC5 is high level,
So that gating switch KC2 and KC5 turns on, make battery core BATC2 in parallel with electric capacity CC, now battery core BATC2 charges to electric capacity CC, holds
The continuous time will allow electric capacity CC voltage be equal to the voltage of BATC2 enough, then controls GC2 and GC5 to be low level, so that gating switch
KC2 and KC5 disconnects, and after certain Dead Time, control GC3 and GC4 is high level, so that gating switch KC3 and KC4 leads
Logical, make battery core BATC1 in parallel with electric capacity CC, now electric capacity CC charges to battery core BATC1 (now electric capacity CA electric discharge), the persistent period
Electric capacity CC voltage is allowed to be equal to the voltage of BATA1 enough.So constantly repeat aforesaid operations (first allow BATC2 to electric capacity CC charge,
Then allow electric capacity CC that BATC1 is charged), after operation is repeated several times, the voltage of BATC2 and the voltage phase of BATC1 will be realized
Deng.
Fig. 2 circuit diagram in another embodiment for the battery equilibrium management system in the present invention.This level is put down
Weighing apparatus management system includes multiple battery equilibriums management circuit, in figure example out 3, and respectively 210,220 and 230.Each
Battery equilibrium manages circuit and is responsible for the management of balance of multiple battery cores being sequentially connected in series, wherein in figure out 3 battery cores.Wherein electricity
Pond management of balance circuit 210 is responsible for the management of balance of battery core BATA1, BATA2 and BATA3, and battery equilibrium management circuit 220 is responsible for
Battery core BATB1, BATB2 and the management of balance of BATB3, battery equilibrium management circuit 230 be responsible for battery core BATC1, BATC2 and
The management of balance of BATC3.
The structure that each battery equilibrium in Fig. 2 manages the cell balancing circuit in circuit and Fig. 1 is essentially identical, described electricity
Pond management of balance circuit 210 includes 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 is a pair, KA3 and KA4 is a pair.
Described battery equilibrium management circuit 220 includes balancing capacitance CB, detection control circuit 221, gate control circuit 222 and many
To gating switch KB1, KB2, KB3, KB4, KB5, KB6.Wherein KB1 and KB6 is a pair, KB2 and KB5 is a pair, KB3 and KB4
For a pair.Described battery equilibrium management circuit 230 includes 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 is a pair,
KC3 and KC4 is a pair.
The difference that each battery equilibrium in Fig. 2 manages the cell balancing circuit in circuit and Fig. 1 is：Figure
Each cell balancing circuit in 2 also includes gating switch KCU1 and KCU2, KBU1 and KBU2 between extra a pair grade, KAU1 and
KAU2.This between level gating switch (or claim between level gating switch to) by the two ends of the balancing capacitance in present battery balancing circuitry
The both positive and negative polarity of the battery core near present battery balancing circuitry being responsible for adjacent cell balancing circuit is linked together, such as
Between level, gating switch is positive and negative to battery core BATB1 that KAU1 and KAU2 connection balancing capacitance CA and cell balancing circuit 220 are responsible for
Pole, battery core BATC1 that between level, gating switch is responsible for KBU1 and KBU2 connection balancing capacitance CB and cell balancing circuit 230 is just
Negative pole.As difference, gating switch KA1, KA2, KA3, KA4, KA5, KA6 can also be referred to as a grade internal gating switch, such
It is right that a pair of gating switch is referred to as grade internal gating switch.In this example, battery core BATB1 corresponding two, to coupling cock, is for a pair
KB3 and KB4, for level internal gating switch, and this connects balancing capacitance CB to gating switch KB3 and KB4, another to KAU1 and
KAU2, for level between gating switch, and this to gating switch KAU1 and KAU2 connect balancing capacitance CA.Battery core BATC1 also corresponds to two
To coupling cock, it is for a pair KC3 and KC4, switchs for level internal gating, and this connects balancing capacitance to gating switch KC3 and KC4
CC, another to KBU1 and KBU2, for level between gating switch, and this to gating switch KBU1 and KBU2 connect balancing capacitance CB.Its
Middle balancing capacitance CA and balancing capacitance CB can be referred to as balancing capacitance adjacent each other, and they correspond to same battery core jointly
BATB1.Likewise, balancing capacitance CB and balancing capacitance CC can be referred to as balancing capacitance adjacent each other, they correspond to jointly
Same battery core BATC1, each balancing capacitance can be connected with the corresponding more piece battery core being sequentially connected in series.Each balancing capacitance is led to
Cross corresponding gating switch to be connected with more piece battery core, such as balancing capacitance CA can with BATA1, BATA2, BATA3,
BATB1 is connected.
Each battery equilibrium in Fig. 2 manages another difference is that of the cell balancing circuit in circuit and Fig. 1：
Each battery equilibrium management circuit includes communication module 213,223 or 233, and affiliated battery equilibrium is managed by this communication module
The battery core voltage of battery core that circuit is responsible for and other battery equilibriums of receiving manage the battery core voltage of the battery core that circuit is responsible for
Pass to the detection control circuit that the battery equilibrium being adjacent manages circuit, so each detection control circuit will understand that institute
There is the battery core voltage condition of battery core.Such as uploaded by up connection end, pass by under dn linkage section.
Described detection control circuit 211,221 and/or 231 exceedes pre- in the difference finding the battery core voltage having two battery cores
When allocating weighing apparatus discrepancy threshold and the corresponding same balancing capacitance of this two battery cores, then start battery equilibrium operation in level.Described level
Interior battery equilibrium operation includes：Described gate control circuit is controlled alternately the difference of battery core voltage to be exceeded predetermined balance difference
This two battery cores of threshold value connect to this same balancing capacitance, to realize the electric energy of this two battery core by this same balancing capacitance
Transfer.Such as when the battery core voltage highest detecting BATC2, the battery core voltage of BATC1 is minimum, and if voltage highest battery core
Difference between voltage and the minimum battery core voltage of voltage exceedes default balance discrepancy threshold, their correspondences same balance electricity
Hold CC, the electric energy transfer of this two battery core will be realized by this same balancing capacitance CC, concrete principle as described above, here no longer
Repeat.
Described detection control circuit 211,221 and/or 231 exceedes pre- in the difference finding the battery core voltage having two battery cores
Allocate weighing apparatus discrepancy threshold and this two battery cores are not when corresponding to same balancing capacitance, then start battery equilibrium operation between level.Described
Between level, battery equilibrium operation includes：By this corresponding balancing capacitance of two battery cores and putting down between this two battery cores
Weighing apparatus electric capacity and these by by balancing capacitance jointly corresponding battery core by described two battery cores, battery core voltage is higher one
On that in individual electric energy transfer extremely described two battery cores, battery core voltage is relatively low.Specifically, if the battery core voltage of BATC3
Height, the battery core voltage of BATA1 is low, and both differences exceed predetermined balance discrepancy threshold, and BATC3 corresponds to balancing capacitance CC,
BATA1 corresponds to balancing capacitance CA, then then start the battery equilibrium between level, that is, by this corresponding balancing capacitance CC of two battery cores
And CA and be located at this two battery cores between balancing capacitance CB and these by by balancing capacitance CC, CB jointly correspond to
Battery core BATC1, BATB1 by the electric energy transfer of higher for battery core voltage in a described two battery cores BATC3 to described two
On a relatively low BATA1 of battery core voltage in battery core.
In order to easy to understand, exceed predetermined balance discrepancy threshold in the difference finding the battery core voltage having two battery cores and be somebody's turn to do
When two battery cores do not correspond to same balancing capacitance, that in two battery cores, battery core voltage is high is referred to as high voltage battery core, than
As BATC3 is referred to as high voltage battery core, that in two battery cores, battery core voltage is low is referred to as low-voltage battery core, such as BATA1
It is referred to as low-voltage battery core, the corresponding balancing capacitance near low-voltage battery core of high voltage battery core is referred to as initially shifting balance electricity
Hold, such as level electric capacity CC is referred to as initially shifting balancing capacitance, the corresponding balance near high voltage battery core of low-voltage battery core
Electric capacity is referred to as finally shifting balancing capacitance, and such as balancing capacitance CA is referred to as finally shifting balancing capacitance, initial transfer balance
Balancing capacitance between electric capacity and final transfer balancing capacitance is referred to as transfer balancing capacitance, during such as balancing capacitance CB is referred to as
Turn balancing capacitance.So, between described level, battery equilibrium operation specifically includes：
By level internal gating switch to by the energy transmission of high voltage battery core to initial transfer balancing capacitance；Such as,
To balancing capacitance CC, this is realized energy transmission on BATC3 by gating switch；
Between by level, gating switch is to common to passing through the energy in initial transfer balancing capacitance with level internal gating switch
Corresponding battery core is transferred in adjacent transfer balancing capacitance；Such as, the energy in balancing capacitance CC is passed by battery core BATC1
It is handed in adjacent transfer balancing capacitance CB, this is also to be realized by gating switch；
Between by level, gating switch is to common to passing through the energy in current transfer balancing capacitance with level internal gating switch
Corresponding battery core is transferred in adjacent next transfer balancing capacitance, until energy is passed to final transfer balancing capacitance
On；Such as, the energy in balancing capacitance CB is transferred to finally shift in balancing capacitance CA by battery core BATB1, this is also logical
Cross gating switch to realize.It is to be understood that due to only one of which transfer balancing capacitance in the present invention, therefore direct here
It has been transferred to final transfer balancing capacitance, if there is multiple transfer balancing capacitances, then there is repeatedly adjacent transfer balance
Energy transmission between electric capacity；
By level internal gating switch to the energy transmission finally being shifted in balancing capacitance to low-voltage battery core；Such as will put down
Energy transmission on weighing apparatus electric capacity CA is to battery core BATA1；
Repeated by continuous, so that the voltage of low-voltage battery core is identical with the voltage of high voltage battery core, such as
The voltage of BATC3 is equal with the voltage of BATA1.
Additionally, in one embodiment, if initially transfer balancing capacitance is adjacent with final transfer balancing capacitance, that
Then there is no transfer balancing capacitance.Between described level, battery equilibrium operation then can become：By the energy transmission of high voltage battery core to first
Begin in transfer balancing capacitance；Energy in initial transfer balancing capacitance is transferred to finally to shift flat by corresponding battery core jointly
On weighing apparatus electric capacity；By the energy transmission in final transfer balancing capacitance to low-voltage battery core.
In one embodiment, each battery equilibrium management circuit 210,220 and 230 in Fig. 2 is a chip, often
Individual chip is responsible for the management of several battery cores.In another embodiment, the plurality of battery equilibrium management circuit 210 in Fig. 2,
220 and 230 may be located in a chip, that is, form same battery management circuit, so can save communication module, only protect
Stay a gate control circuit and detection control circuit, and this detection control circuit carries out voltage detecting to all battery cores, institute
State gate control circuit to all, gating switch to be controlled.Now, equally can be put down using battery in above-described level
Between weighing apparatus operation and level, battery equilibrium operation carries out battery equilibrium management, and principle is identical.
A specific example, the voltage highest of system detectio to BATC3 are set forth below, the voltage of BATA1 is minimum, and two
Voltage difference between person has exceeded balance discrepancy threshold, then need to carry out the balance of voltage to BATC3 and BATA1.For higher level's
Circuit 230 can control as follows：Can control and first allow KC1 and KC6 simultaneously turn on, now BATC3 charges to electric capacity CC；Allow KC3
Simultaneously turn on KC4, allow electric capacity CC to charge for BATC1；It is alternately repeated above-mentioned steps.Can be as follows for middle circuit 220
Control：Can control and first allow KBU1 and KBU2 simultaneously turn on, now BATC1 charges to electric capacity CB；KB3 and KB4 is allowed to simultaneously turn on,
Electric capacity CB is allowed to charge for BATB1；It is alternately repeated above-mentioned steps.Can control as follows for the circuit 210 under：Elder generation can be controlled
KAU1 and KAU2 is allowed to simultaneously turn on, now BATB1 charges to electric capacity CA；Allow KA3 and KA4 to simultaneously turn on, allow electric capacity CA be BATA1
Charge；It is alternately repeated above-mentioned steps.
In a preferred embodiment, the different gating switches in same circuit, to simultaneously turning on, control different
When gating switch is to alternate conduction, different gating switches need there is certain Dead Time between conducting, and Dead Time is permissible
Design very little, but need more than 0.It thus is avoided that unnecessary efficiency losses when simultaneously turning on.
Fig. 3 circuit diagram in another embodiment for the battery equilibrium management system in the present invention.Electricity in Fig. 3
The difference of the battery equilibrium management system in pond balancing management system and Fig. 2 is：Each battery equilibrium manages circuit
210th, the position of the gating switch between 220 with the extra level in 230 and annexation are different.In figure 3, battery equilibrium management
Between the level in circuit 230, gating switch is the first gating switch KCD1 and the second gating switch KCD2, and this will be put down to gating switch
The positive and negative end that the two ends of weighing apparatus electric capacity CC manage, with battery equilibrium, battery core BATB3 that circuit 220 is responsible for respectively is connected, and battery is put down
Between the level in weighing apparatus management circuit 220, gating switch is the first gating switch KBD1 and the second gating switch KBD2, and this is opened to gating
Close the positive and negative end that with battery equilibrium, the two ends of balancing capacitance CB are managed battery core BATA3 that circuit 210 is responsible for respectively to be connected,
Between the level in battery equilibrium management circuit 210, gating switch is the first gating switch KAD1 and the second gating switch KAD2, and this is right
The two ends of balancing capacitance CA and ensuing battery equilibrium are managed the positive and negative end phase of the battery core that circuit is responsible for by gating switch
Even.Remaining operation principle is identical with the battery equilibrium management system in Fig. 2, is not repeated herein.
In the present invention, " connect ", be connected, " company ", " connecing " etc. represent the word being electrical connected, if no special instructions, then
Represent direct or indirect electric connection.
It is pointed out that any change that one skilled in the art is done to the specific embodiment of the present invention
Scope all without departing from claims of the present invention.Correspondingly, the scope of the claim of the present invention is also not merely limited to
In previous embodiment.
Claims (6)
1. a kind of battery equilibrium management circuit of more piece battery core being sequentially connected in series is it is characterised in that it includes：
Multiple balancing capacitances；
Detection control circuit, it detects and compares the battery core voltage of each battery core, has the battery core voltage of two battery cores in discovery
When difference exceedes predetermined balance discrepancy threshold, then by described balancing capacitance by described two battery cores, battery core voltage is higher one
On that in individual electric energy transfer extremely described two battery cores, battery core voltage is relatively low,
The corresponding battery core of multipair gating switch, wherein each pair gating switch and a balancing capacitance, and by corresponding battery core
Both positive and negative polarity connects to the two ends of corresponding balancing capacitance, and each battery core corresponds to a pair or two pairs of gating switches, each balancing capacitance
Corresponding multipair gating switch, each pair gating switch includes the first gating switch and the second gating switch, and the of the first gating switch
One connection end is connected with the positive pole of corresponding battery core, the second connection end of the first gating switch and the first of corresponding balancing capacitance
Connection end is connected, and the first connection end of the second gating switch is connected with the negative pole of corresponding battery core, and the second of the second gating switch
Connection end is connected with the second connection end of corresponding balancing capacitance；
Gate control circuit, the first gating switch in its control each pair gating switch and the second gating switch simultaneously turn on or same
When turn off, by this to gating switch corresponding battery core connect to corresponding balancing capacitance or disconnect this to gating switch correspond to
Battery core and described balancing capacitance connection,
Each balancing capacitance can be connected with the corresponding more piece battery core being sequentially connected in series by gating switch,
Two adjacent balancing capacitances can be connected with corresponding same battery core by gating switch,
Described detection control circuit exceedes predetermined balance discrepancy threshold in the difference finding the battery core voltage having two battery cores and is somebody's turn to do
When two battery cores correspond to same balancing capacitance, then start battery equilibrium operation in level, battery equilibrium operation in described level includes：
This two battery cores that the difference of battery core voltage is alternately exceeded predetermined balance discrepancy threshold by described gate control circuit are controlled to connect
It is 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 exceedes predetermined balance discrepancy threshold in the difference finding the battery core voltage having two battery cores and is somebody's turn to do
When two battery cores do not correspond to same balancing capacitance, then start battery equilibrium operation between level, battery equilibrium operation bag between described level
Include：By this corresponding balancing capacitance of two battery cores and be located at this two battery cores between balancing capacitance and these borrowed
Corresponding battery core is extremely described by the electric energy transfer of higher for battery core voltage in described two battery cores jointly for the balancing capacitance helping
On that in two battery cores, battery core voltage is relatively low.
2. battery equilibrium management circuit according to claim 1 is it is characterised in that described detection control circuit is finding have
The difference of the battery core voltage of two battery cores exceedes predetermined balance discrepancy threshold and this two battery cores do not correspond to same balancing capacitance
When, that in two battery cores, battery core voltage is high is referred to as high voltage battery core, and that in two battery cores, battery core voltage is low is claimed
For low-voltage battery core, the corresponding balancing capacitance near low-voltage battery core of high voltage battery core is referred to as initially shifting balancing capacitance,
The corresponding balancing capacitance near high voltage battery core of low-voltage battery core is referred to as finally shifting balancing capacitance, initial transfer balance electricity
The balancing capacitance held and final transfer balancing capacitance between is referred to as transfer balancing capacitance,
Between described level, battery equilibrium operation includes：
By in the energy transmission of high voltage battery core to initial transfer balancing capacitance；
Energy in initial transfer balancing capacitance is transferred in adjacent transfer balancing capacitance by corresponding battery core jointly；
Energy in current transfer balancing capacitance is transferred to adjacent next transfer balance electricity by corresponding battery core jointly
Rong Shang, until energy is passed in final transfer balancing capacitance；
By the energy transmission in final transfer balancing capacitance to low-voltage battery core.
If battery equilibrium according to claim 2 management circuit it is characterised in that initially transfer balancing capacitance with
Transfer balancing capacitance is adjacent eventually, then then do not have transfer balancing capacitance.
4. a kind of battery equilibrium management system is it is characterised in that it includes：Multiple battery equilibriums manage circuit, are responsible for going here and there successively
The battery equilibrium management of the more piece battery core of connection, wherein each battery equilibrium management circuit are responsible in the more piece battery core being sequentially connected in series
The battery equilibrium management of part battery core,
Each battery equilibrium management circuit includes：
One balancing capacitance；
The corresponding battery core of multipair gating switch, wherein each pair gating switch and a balancing capacitance, and by corresponding battery core
Both positive and negative polarity connects to the two ends of corresponding balancing capacitance, and each battery core corresponds to a pair or two pairs of gating switches, each balancing capacitance
Corresponding multipair gating switch, each pair gating switch includes the first gating switch and the second gating switch, and the of the first gating switch
One connection end is connected with the positive pole of corresponding battery core, the second connection end of the first gating switch and the first of corresponding balancing capacitance
Connection end is connected, and the first connection end of the second gating switch is connected with the negative pole of corresponding battery core, and the second of the second gating switch
Connection end is connected with the second connection end of corresponding balancing capacitance；
Gate control circuit, the first gating switch in its control each pair gating switch and the second gating switch simultaneously turn on or same
When turn off, by this to gating switch corresponding battery core connect to corresponding balancing capacitance or disconnect this to gating switch correspond to
Battery core and described balancing capacitance connection；
Detection control circuit, it compares the battery core voltage of each battery core, surpasses in the difference finding the battery core voltage having two battery cores
When crossing predetermined balance discrepancy threshold, then by described balancing capacitance by the electricity of higher for battery core voltage in described two battery cores
Can be transferred on relatively low one of battery core voltage in described two battery cores,
Each battery equilibrium management circuit includes communication module, and affiliated battery equilibrium management circuit is responsible for by this communication module
The battery core voltage of battery core and other battery equilibriums of receiving manage the battery core that circuit is responsible for battery core voltage pass to
Its adjacent battery equilibrium manages the detection control circuit of circuit, and so each battery equilibrium manages the detection control circuit of circuit
It 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 being sequentially connected in series, adjacent two balancing capacitances can with right
The same battery core answered is connected,
Exceed predetermined balance discrepancy threshold in the difference finding the battery core voltage having two battery cores and this two battery core correspondences are same
During individual balancing capacitance, then start battery equilibrium operation in level, battery equilibrium operation in described level includes：Described gating is controlled to control
This two battery cores that the difference of battery core voltage is alternately exceeded predetermined balance discrepancy threshold by circuit connect to this same balance electricity
Rong Shang, to realize the electric energy transfer of this two battery core by this same balancing capacitance；
Exceed predetermined balance discrepancy threshold in the difference finding the battery core voltage having two battery cores and this two battery cores are corresponding same
During one balancing capacitance, then start battery equilibrium operation between level, battery equilibrium operation between described level includes：By this two battery cores
Corresponding balancing capacitance and be located at this two battery cores between balancing capacitance and these by by balancing capacitance common
Corresponding battery core will be electric for battery core in the electric energy transfer of higher for battery core voltage in described two battery cores to described two battery cores
Press on relatively low one.
5. battery equilibrium management system according to claim 4 it is characterised in that
Described detection control circuit exceedes predetermined balance discrepancy threshold in the difference finding the battery core voltage having two battery cores and is somebody's turn to do
When two battery cores do not correspond to same balancing capacitance, in two battery cores, battery core voltage is high, and that is referred to as high voltage battery core, and two
That that in individual battery core, battery core voltage is low is referred to as low-voltage battery core, the corresponding balance near low-voltage battery core of high voltage battery core
Electric capacity is referred to as initially shifting balancing capacitance, and the corresponding balancing capacitance near high voltage battery core of low-voltage battery core is referred to as finally
Transfer balancing capacitance, the balancing capacitance between initial transfer balancing capacitance and final transfer balancing capacitance is referred to as transfer balance electricity
Hold,
Between described level, battery equilibrium operation includes：
By in the energy transmission of high voltage battery core to initial transfer balancing capacitance；
Energy in initial transfer balancing capacitance is transferred in adjacent transfer balancing capacitance by corresponding battery core jointly；
Energy in current transfer balancing capacitance is transferred to adjacent next transfer balance electricity by corresponding battery core jointly
Rong Shang, until energy is passed in final transfer balancing capacitance；
By the energy transmission in final transfer balancing capacitance to low-voltage battery core.
6. battery equilibrium management system according to claim 5 is it is characterised in that each battery equilibrium manages in circuit
Gating switch is divided into grade internal gating and switchs gating switch and between level, and two level internal gatings switches form a pair of gating switch and are referred to as
Level internal gating switch is right, and between two levels, a pair of gating switch of gating switch formation is referred to as choosing in gating switch pair between level, described level
Open up the two ends closed to the balancing capacitance that affiliated battery equilibrium manages circuit to connect to affiliated battery equilibrium management circuit
The both positive and negative polarity of a responsible battery core, between described level, gating switch is to the balancing capacitance that affiliated battery equilibrium manages circuit
Two ends connect to another adjacent battery equilibrium the both positive and negative polarity managing the battery core that circuit is responsible for,
Between described level, battery equilibrium operation includes：
By corresponding level internal gating switch to by the energy transmission of high voltage battery core to initial transfer balancing capacitance；
Between by corresponding level, gating switch switchs to the energy initially being shifted in balancing capacitance to corresponding level internal gating
It is transferred in adjacent transfer balancing capacitance by corresponding battery core jointly；
Between by corresponding level gating switch to corresponding level internal gating switch to by the energy in current transfer balancing capacitance
It is transferred in adjacent next transfer balancing capacitance by corresponding battery core jointly, put down until energy is passed to final transfer
On weighing apparatus electric capacity；
By corresponding level internal gating switch to the energy transmission finally being shifted in balancing capacitance to low-voltage battery core.
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| JP6627635B2 (en) * | 2015-07-07 | 2020-01-08 | 住友電気工業株式会社 | Voltage measurement device and voltage measurement method, and voltage control device and voltage control method |
| CN114243863A (en) * | 2021-12-30 | 2022-03-25 | 杭州宇谷科技有限公司 | Active equalization circuit based on MOS (Metal oxide semiconductor) transistor control, battery management system and method |
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Address after: 214028 10th Floor, Area A, 530 Building, Qingyuan Road, Taihu International Science Park, Wuxi New District, Jiangsu Province Patentee after: WUXI ZHONGGAN MICROELECTRONIC CO., LTD. Address before: 214028 10th Floor, Area A, 530 Building, Qingyuan Road, Taihu International Science Park, Wuxi New District, Jiangsu Province Patentee before: Wuxi Vimicro Co., Ltd. |