CN106230045A - A kind of based on the two-way active equalization circuit synchronizing flyback DC/DC changer - Google Patents
A kind of based on the two-way active equalization circuit synchronizing flyback DC/DC changer Download PDFInfo
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- CN106230045A CN106230045A CN201610609615.3A CN201610609615A CN106230045A CN 106230045 A CN106230045 A CN 106230045A CN 201610609615 A CN201610609615 A CN 201610609615A CN 106230045 A CN106230045 A CN 106230045A
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- lithium
- ions battery
- discharge
- current
- flyback
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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
- H02J7/0018—Circuits for equalisation of charge between batteries using separate charge circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33561—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having more than one ouput with independent control
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
- H02M3/33584—Bidirectional converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
- H02M3/33592—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer having a synchronous rectifier circuit or a synchronous freewheeling circuit at the secondary side of an isolation transformer
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
A kind of two-way active equalization circuit based on synchronization flyback DC/DC changer, including lithium-ions battery group, voltage collection circuit, synchronization flyback DC/DC converter module, key control unit；Lithium-ions battery group includes multiple battery cell, synchronize flyback DC/DC converter module and include multiple changer, voltage acquisition module gathers the monomer voltage of each battery, charging current or discharge current, key control unit calculating the discharge and recharge carrying capacity according to each battery, control changer battery is charged, it is ensured that battery voltage balanced in current lithium-ions battery group.Active equalization circuit of the present invention, solves the unbalanced problem of battery cell voltage in lithium-ions battery group, compared with prior art, while realizing lithium-ions battery group electric voltage equalization, also has circuit structure, controls logic simply, the advantage that reliability is high.
Description
Technical field
The present invention relates to lithium-ions battery technical group field, a kind of based on synchronizing flyback DC/DC changer
Two-way active equalization circuit.
Background technology
Lithium-ions battery group is made up of multiple lithium ion single connection in series-parallel, due to the diversity of monomer, in discharge and recharge
During there will be the voltage difference opposite sex, if not controling effectively, portion between series connection monomer different in lithium-ions battery group
Point lithium-ions battery monomer arises that to overcharge and crosses puts phenomenon, has a strong impact on the power supply safety of lithium-ions battery group and makes
With the life-span, therefore in lithium-ions battery group charge and discharge process, the way of equilibrium can be used to eliminate between difference series connection monomer
The diversity of voltage.
Simplest in existing lithium-ions battery group balancing technique is the method using parallel resistance, i.e. passive equal
Weighing apparatus, this method is to reach lithium-ions battery group electric voltage equalization by being dissipated as heat by the energy in high voltage monomer
Effect, have energy utilization efficiency difference shortcoming.
Summary of the invention
Present invention solves the technical problem that and be: overcome the deficiencies in the prior art, it is provided that be a kind of by using Synchronization Control
Method, solves the two-way fast transfer problem of energy in single battery, has that quickly to realize lithium-ions battery group voltage equal
The two-way active equalization circuit based on synchronization flyback DC/DC changer of the advantage of weighing apparatus.
The technical solution of the present invention is: a kind of two-way active equalization circuit based on synchronization flyback DC/DC changer,
Including lithium-ions battery group, voltage collection circuit, synchronization flyback DC/DC converter module, key control unit, wherein
Lithium-ions battery group, including multiple lithium-ions battery monomers, each lithium-ions battery monomer is all connected with one
Individual different synchronization flyback DC/DC changer；
Synchronize flyback DC/DC converter module, including multiple synchronization flyback DC/DC changers, synchronize the conversion of flyback DC/DC
The lithium-ions battery monomer connected is charged or discharges by device；
Voltage acquisition module, the collection period sent according to outside periodically gather in lithium-ions battery group each lithium from
Key control unit is delivered to after the monomer voltage of sub-accumulator；In lithium-ions battery group, each lithium-ions battery monomer fills
In electricity or discharge process, the charging current of each lithium-ions battery monomer of Real-time Collection or discharge current, and deliver to core
Heart control unit；
Key control unit, calculates whole lithium-ions battery group after receiving the monomer voltage of each lithium-ions battery
Average monomer voltage, and then obtain monomer voltage and the lithium-ions battery group average monomer voltage of each lithium-ions battery
Difference, according to monomer voltage and the difference of lithium-ions battery group average monomer voltage, each lithium of each lithium-ions battery
The capacity voltage ratio of ion accumulator obtains the discharge and recharge carrying capacity that each lithium-ions battery needs, to each lithium ion electric power storage
The discharge and recharge carrying capacity that pond monomer needs judges, if the discharge and recharge carrying capacity that lithium-ions battery monomer needs just is,
The synchronization flyback DC/DC changer then connected according to discharge and recharge carrying capacity, current lithium-ions battery monomer is calculated theory
Discharge time, then control the synchronization flyback DC/DC changer of current lithium-ions battery connection to current lithium-ions battery
Carry out discharging until discharge time equal to the theoretical discharge time or is calculated the current lithium-ions battery of next collection period
Discharge and recharge carrying capacity；If the discharge and recharge carrying capacity that lithium-ions battery needs is negative, then absolute according to discharge and recharge carrying capacity
The synchronization flyback DC/DC changer that value, current lithium-ions battery connect is calculated the theoretical charging interval, then controls current
Current lithium-ions battery is charged until the charging interval etc. by the synchronization flyback DC/DC changer that lithium-ions battery connects
In theoretical charging interval or the discharge and recharge carrying capacity that is calculated the current lithium-ions battery of next collection period；If lithium from
The discharge and recharge carrying capacity that sub-accumulator needs is 0, does not operates, and it is charged that wait is calculated next collection period discharge and recharge
Amount；Judge after receiving charge or discharge electric current, when charging current is more than charging current threshold value, control current charged electrical
The synchronization flyback DC/DC changer that stream is corresponding turns off, and when discharge current is more than discharging current threshold, controls present discharge electric current
Corresponding synchronization flyback DC/DC changer turns off.
The described monomer voltage according to each lithium-ions battery and the difference of lithium-ions battery group average monomer voltage
Value, the capacity voltage ratio of each lithium-ions battery obtain the method for the discharge and recharge carrying capacity that each lithium-ions battery needs
For: the monomer voltage of lithium-ions battery and the difference of lithium-ions battery group average monomer voltage, the appearance of lithium-ions battery
Amount voltage ratio be multiplied for lithium-ions battery need discharge and recharge carrying capacity.
The span of the voltage capacity ratio of each described lithium-ions battery is 0.4Ah/V～80Ah/V.
Described charging current threshold value span is 0A～80A, and discharging current threshold span is 0A～80A.
Described synchronization flyback DC/DC converter module includes multiple structure function identical synchronization flyback DC/DC
Changer, each synchronization flyback DC/DC changer includes transformator, primary MOSFET circuit, primary current sample circuit, secondary
MOSFET circuit, secondary current sample circuit；The lithium that transformer primary side one end is connected with current sync flyback DC/DC changer from
Sub-single battery anode is connected, and primary MOSFET circuit D end is connected with the former limit other end of transformator, primary current sampling electricity
One end, road is connected with primary MOSFET circuit S end, the primary current sample circuit other end and lithium-ions battery monomer negative terminal phase
Even, secondary one end of transformator is connected with lithium-ions battery group anode, and secondary MOSFET circuit D end is another with the secondary of transformator
One end is connected, and secondary current sample circuit one end is connected with secondary MOSFET circuit S end, the secondary current sample circuit other end and
Lithium-ions battery group negative terminal is connected, and primary MOSFET circuit G end, secondary MOSFET circuit G end are all with key control unit even
Connect；Primary MOSFET circuit G end, secondary MOSFET circuit G end receive charging instruction or the electric discharge that key control unit sends
Instruction, the former limit of transformator, secondary are charged according to charging instruction or electric discharge instruction or discharge, and wherein, are filling
During electricity, transformer secondary is charged enable by lithium-ions battery group, lithium-ions battery monomer is carried out by transformer primary side
Charging, when discharging, enables lithium-ions battery monomer and discharges transformer primary side, and transformer secondary is to lithium ion
Battery charging.
Described key control unit calculates whole lithium ion electric power storage after receiving the monomer voltage of each lithium-ions battery
Pond group average monomer voltage, and then obtain monomer voltage and the lithium-ions battery group average monomer electricity of each lithium-ions battery
The difference of pressure, according to the monomer voltage of each lithium-ions battery and the difference of lithium-ions battery group average monomer voltage, each
The capacity voltage ratio of individual lithium-ions battery obtains the discharge and recharge carrying capacity that each lithium-ions battery needs, to each lithium ion
The carrying out of the discharge and recharge carrying capacity that accumulator needs judges, if the discharge and recharge carrying capacity that lithium-ions battery needs just is, then
When the synchronization flyback DC/DC changer connected according to discharge and recharge carrying capacity, current lithium-ions battery is calculated theoretical discharge
Between, then produce the high level signal that the persistent period is the theoretical discharge time and deliver to primary MOSFET circuit G end, secondary MOSFET
Circuit G end, wherein, first high level signal delivers to primary MOSFET circuit G end, has controlled current lithium-ions battery and has connected
Synchronization flyback DC/DC changer current lithium-ions battery is discharged until discharge time equal to the theoretical discharge time or
Person is calculated the discharge and recharge carrying capacity of the current lithium-ions battery of next collection period；
If the discharge and recharge carrying capacity that lithium-ions battery needs be negative, then according to discharge and recharge carrying capacity absolute value, currently
The synchronization flyback DC/DC changer that lithium-ions battery connects is calculated the theoretical charging interval, and then the generation persistent period is
The high level signal in theoretical charging interval delivers to primary MOSFET circuit G end, secondary MOSFET circuit G end, and wherein, high level is believed
Number first deliver to secondary MOSFET circuit G end, control synchronization flyback DC/DC changer that current lithium-ions battery connects to working as
Front lithium-ions battery is charged until the charging interval equal to the theoretical charging interval or is calculated next collection period and works as
The discharge and recharge carrying capacity of front lithium-ions battery；
If lithium-ions battery need discharge and recharge carrying capacity be 0, do not operate, wait calculated next
Collection period discharge and recharge carrying capacity；Judge after receiving charge or discharge electric current, when charging current is more than charging current threshold
During value, control secondary MOSFET circuit G end in the synchronization flyback DC/DC changer that current charging current is corresponding and turn off, work as electric discharge
When electric current is more than discharging current threshold, control primary MOSFET in the synchronization flyback DC/DC changer that present discharge electric current is corresponding
Circuit G end turns off.
Present invention advantage compared with prior art is:
(1) present invention is compared with prior art, by proposing a kind of two-way active equalization based on DC/DC changer electricity
Road, solves the unbalanced problem of battery cell voltage in lithium-ions battery group, it is possible to quickly realize lithium-ions battery group
Electric voltage equalization, there is good using effect；
(2) active equalization circuit of the present invention is compared with prior art, by using synchronisation control means, solves accumulator
In monomer, the two-way fast transfer problem of energy, has the advantage quickly realizing lithium-ions battery group electric voltage equalization；
(3) active equalization circuit of the present invention is compared with prior art, realize lithium-ions battery group electric voltage equalization
Meanwhile, also there is circuit structure, control logic simply, the advantage that reliability is high.
Accompanying drawing explanation
Fig. 1 is that the present invention is a kind of based on the two-way active equalization circuit structural representation synchronizing flyback DC/DC changer；
Fig. 2 is monomer n in the present invention (1≤n≤N) charge balancing workflow diagram, and wherein, N is positive integer；
Fig. 3 is monomer n in the present invention (1≤n≤N) equalization discharge workflow diagram；
Fig. 4 is monomer n in the present invention (1≤n≤N) neither charge balancing the most not equalization discharge flow chart.
Detailed description of the invention
The present invention is directed to existing parallel resistance realize lithium-ions battery group balancing technique and need in high voltage monomer
Energy dissipate as heat bring energy utilization efficiency difference shortcoming, by use energy transfer method realize lithium
The electric voltage equalization of each battery cell in ion accumulator group, will transfer to low-voltage by the energy in high voltage monomer in an orderly manner
In monomer, it is achieved the concordance of Series Sheet bulk voltage, the present invention is described in detail below in conjunction with the accompanying drawings.
It is illustrated in figure 1 a kind of two-way active equalization circuit structural representation based on synchronization flyback DC/DC changer, bag
Include lithium-ions battery group terminals, voltage collection circuit, synchronization flyback DC/DC changer, key control unit, also included
Terminals (K0, K1 ... Kn), wherein, K0 is the negative pole of lithium-ions battery group, K1 be lithium-ions battery group monomer 1 just
Pole, by that analogy, Kn is the positive pole of lithium-ions battery group monomer n, lithium-ions battery group monomer 1 to lithium-ions battery group
Monomer n series connection forms lithium-ions battery group.
Synchronize flyback DC/DC converter module, including multiple synchronization flyback DC/DC changers, each lithium-ions battery
Monomer is all connected with a different synchronization flyback DC/DC changer, synchronizes the lithium ion electric power storage to connecting of the flyback DC/DC changer
Pond monomer is charged or discharges, and each synchronization flyback DC/DC changer includes transformator, primary MOSFET circuit, primary
Current sampling circuit, secondary MOSFET circuit and secondary current sample circuit.Transformer primary side one end and current sync flyback DC/
The lithium-ions battery monomer anode that DC changer connects is connected, primary MOSFET circuit D end and the former limit other end of transformator
Being connected, primary current sample circuit one end is connected with primary MOSFET circuit S end, the primary current sample circuit other end and lithium from
Sub-single battery negative terminal is connected, and secondary one end of transformator is connected with lithium-ions battery group anode, secondary MOSFET circuit D
End is connected with the secondary other end of transformator, and secondary current sample circuit one end is connected with secondary MOSFET circuit S end, secondary electrical
The stream sample circuit other end is connected with lithium-ions battery group negative terminal, primary MOSFET circuit G end, secondary MOSFET circuit G end
All it is connected with key control unit.
Voltage acquisition module, for realizing controlling the voltage acquisition of parameter, periodically gathers in lithium-ions battery group each
Key control unit is delivered to after the monomer voltage of individual lithium-ions battery；Each lithium-ions battery in lithium-ions battery group
During monomer charge or discharge, the charging current of each lithium-ions battery monomer of Real-time Collection or discharge current, adopt
Key control unit is given by data/address bus after sample.
Key control unit, for realizing controlling the logical judgment of parameter, receives each monomer that voltage collection circuit provides
Voltage and each synchronize the charging and discharging currents sampled value of the primary and secondary side in flyback DC/DC changer, according to receive each
The monomer voltage of lithium-ions battery calculates the average monomer voltage of whole lithium-ions battery group, and then obtains each lithium ion
The monomer voltage of accumulator and the difference of lithium-ions battery group average monomer voltage, by the monomer electricity of each lithium-ions battery
Pressure is multiplied with the difference of lithium-ions battery group average monomer voltage, the capacity voltage ratio of each lithium-ions battery, obtains each
The discharge and recharge carrying capacity that individual lithium-ions battery needs.The capacity voltage ratio of lithium-ions battery is the intrinsic of lithium-ions battery
Characteristic, different lithium-ions batteries, the capacity voltage ratio of its correspondence is different.Each lithium-ions battery monomer is needed
Discharge and recharge carrying capacity judge, if lithium-ions battery monomer need discharge and recharge carrying capacity be just, then according to charge and discharge
The synchronization flyback DC/DC changer that quantities of charge, current lithium-ions battery monomer connect is calculated the theoretical discharge time, so
The rear generation persistent period is that the high level signal of theoretical discharge time delivers to primary MOSFET circuit G end, secondary MOSFET circuit G
End, wherein, first high level signal delivers to primary MOSFET circuit G end, and the synchronization controlling the connection of current lithium-ions battery is anti-
Swash DC/DC changer current lithium-ions battery to be discharged until discharge time equal to the theoretical discharge time or calculates
Discharge and recharge carrying capacity to the current lithium-ions battery of next collection period；If the discharge and recharge that lithium-ions battery needs is charged
Amount is negative, then the synchronization flyback DC/DC changer connected according to discharge and recharge carrying capacity absolute value, current lithium-ions battery calculates
Obtain the theoretical charging interval, then produce the high level signal that the persistent period is the theoretical charging interval and deliver to primary MOSFET circuit
G end, secondary MOSFET circuit G end, wherein, first high level signal delivers to secondary MOSFET circuit G end, controls current lithium ion
Current lithium-ions battery is charged until the charging interval is equal to theory by the synchronization flyback DC/DC changer that accumulator connects
Charging interval or be calculated the discharge and recharge carrying capacity of the current lithium-ions battery of next collection period；If lithium ion electric power storage
The discharge and recharge carrying capacity that pond needs is 0, does not operates, waits next collection period discharge and recharge carrying capacity calculated；
In synchronizing flyback DC/DC changer charge and discharge process, key control unit receives the charging current that voltage collection circuit gathers
And discharge current, and judge after charging and discharging electric current, when charging current is more than charging current threshold value, control current
In the synchronization flyback DC/DC changer that charging current is corresponding, secondary MOSFET circuit G end turns off, when discharge current is more than electric discharge electricity
During stream threshold value, control primary MOSFET circuit G end in the synchronization flyback DC/DC changer that present discharge electric current is corresponding and turn off.
The present invention, based on synchronizing the two-way active equalization circuit of flyback DC/DC changer compared with prior art, uses same
Step flyback DC/DC converter topology and synchronisation control means, it is achieved the bidirectional energy transfer of big electric current, for any one joint lithium from
Sub-accumulator battery monomer, either this monomer needs charging or electric discharge or both need not charge also without electric discharge, this
Invention circuit all can complete, especially when in multiple lithium-ions battery groups, multiple monomers need equilibrium, and circuit of the present invention
The equalization operation of all monomers can be carried out simultaneously.
After existing lithium-ions battery group uses the equalizing circuit of the present invention, it is possible to simultaneously to the list that be there is a need to equilibrium
Body carries out fast charging and discharging equilibrium, it is ensured that the voltage concordance of all monomers of lithium-ions battery group, it is ensured that lithium-ions battery
The safety in utilization of group and service life.Relative to other active equalization circuits, it is anti-that the change of the present invention is mainly reflected in synchronization
Swashing application and the Synchronization Control logic thereof of DC/DC changer, the former limit input synchronizing flyback DC/DC changer stores with lithium ion
The corresponding battery cell both positive and negative polarity of set of cells is connected, and secondary input is connected with the both positive and negative polarity of accumulator battery, voltage acquisition electricity
Road gathers each monomer voltage of lithium-ions battery group and synchronizes the sampled voltage of flyback DC/DC changer, is connect by data/address bus
Entering key control unit, the control signal synchronizing flyback DC/DC changer accesses in key control unit.Synchronize flyback DC/DC
Changer corresponds respectively to each lithium-ions battery group monomer, including transformator, primary MOSFET circuit, primary current sampling
Circuit, secondary MOSFET circuit and secondary current sample circuit.Transformator is for realizing the transfer of electric energy, i.e. electric energy turns from monomer
Move on to lithium-ions battery group and electric energy and transfer to monomer from lithium-ions battery group, the turn ratio of the primary and secondary of transformator
The control of electric energy transfer it is used for, it is achieved synchronize the conversion of flyback DC/DC for 1:T, primary MOSFET circuit and secondary MOSFET circuit
Controlling, primary current sample circuit and secondary current sample circuit current sample when discharge and recharge, through voltage collection circuit
Key control unit is delivered in collection, and key control unit is according to the charging and discharging currents gathered, when it exceedes threshold values set in advance
Time, turn off and synchronize flyback DC/DC changer.
When monomer n of the present invention (1≤n≤N) needs charging, equalizing circuit workflow is as shown in table 1 and Fig. 2.
Balanced operation process when table 1 monomer n needs to charge
When monomer n of the present invention (1≤n≤N) needs electric discharge electricity, equalizing circuit workflow is as shown in Table 2 and Figure 3.
Balanced operation process when table 2 monomer n needs to discharge
When monomer n of the present invention (1≤n≤N) both need not charge also without electric discharge, equalizing circuit workflow such as table 3
Shown in Fig. 4.
It is balanced operation process also without charging that table 3 monomer n both need not electric discharge
The content not being described in detail in description of the invention belongs to the known technology of those skilled in the art.
Claims (6)
1. a two-way active equalization circuit based on synchronization flyback DC/DC changer, it is characterised in that include lithium ion electric power storage
Pond group, voltage collection circuit, synchronization flyback DC/DC converter module, key control unit, wherein
Lithium-ions battery group, including multiple lithium-ions battery monomers, each lithium-ions battery monomer is all connected with one not
Same synchronization flyback DC/DC changer；
Synchronize flyback DC/DC converter module, including multiple synchronization flyback DC/DC changers, synchronize flyback DC/DC changer pair
The lithium-ions battery monomer connected is charged or discharges；
Voltage acquisition module, the collection period sent according to outside periodically gathers each lithium ion in lithium-ions battery group and stores
Key control unit is delivered to after the monomer voltage of battery；In lithium-ions battery group each lithium-ions battery monomer charging or
In person's discharge process, the charging current of each lithium-ions battery monomer of Real-time Collection or discharge current, and deliver to core control
Unit processed；
Key control unit, calculates the average of whole lithium-ions battery group after receiving the monomer voltage of each lithium-ions battery
Monomer voltage, and then obtain the monomer voltage of each lithium-ions battery and the difference of lithium-ions battery group average monomer voltage
Value, according to the monomer voltage of each lithium-ions battery and the difference of lithium-ions battery group average monomer voltage, each lithium from
The capacity voltage ratio of sub-accumulator obtains the discharge and recharge carrying capacity that each lithium-ions battery needs, to each lithium-ions battery
The discharge and recharge carrying capacity that monomer needs judges, if the discharge and recharge carrying capacity that lithium-ions battery monomer needs just is, then
The synchronization flyback DC/DC changer connected according to discharge and recharge carrying capacity, current lithium-ions battery monomer is calculated theory and puts
The electricity time, current lithium-ions battery is entered by the synchronization flyback DC/DC changer then controlling the connection of current lithium-ions battery
Row electric discharge is until equal to the theoretical discharge time or being calculated next collection period current lithium-ions battery discharge time
Discharge and recharge carrying capacity；If lithium-ions battery need discharge and recharge carrying capacity be negative, then according to discharge and recharge carrying capacity absolute value,
The synchronization flyback DC/DC changer that current lithium-ions battery connects is calculated the theoretical charging interval, then controls current lithium
Current lithium-ions battery is charged until the charging interval is equal to by the synchronization flyback DC/DC changer that ion accumulator connects
Theoretical charging interval or be calculated the discharge and recharge carrying capacity of the current lithium-ions battery of next collection period；If lithium ion
The discharge and recharge carrying capacity that accumulator needs is 0, does not operates, and it is charged that wait is calculated next collection period discharge and recharge
Amount；Judge after receiving charge or discharge electric current, when charging current is more than charging current threshold value, control current charged electrical
The synchronization flyback DC/DC changer that stream is corresponding turns off, and when discharge current is more than discharging current threshold, controls present discharge electric current
Corresponding synchronization flyback DC/DC changer turns off.
A kind of two-way active equalization circuit based on synchronization flyback DC/DC changer the most according to claim 1, its feature
It is: the difference of the described monomer voltage according to each lithium-ions battery and lithium-ions battery group average monomer voltage,
The capacity voltage ratio of each lithium-ions battery obtains the method for the discharge and recharge carrying capacity that each lithium-ions battery needs: lithium
The monomer voltage of ion accumulator and the difference of lithium-ions battery group average monomer voltage, the capacity voltage of lithium-ions battery
Than the discharge and recharge carrying capacity needed for lithium-ions battery that is multiplied.
A kind of two-way active equalization circuit based on synchronization flyback DC/DC changer the most according to claim 1 and 2, its
It is characterised by: the span of the voltage capacity ratio of each described lithium-ions battery is 0.4Ah/V～80Ah/V.
A kind of two-way active equalization circuit based on synchronization flyback DC/DC changer the most according to claim 1 and 2, its
It is characterised by: described charging current threshold value span is 0A～80A, and discharging current threshold span is 0A～80A.
A kind of two-way active equalization circuit based on synchronization flyback DC/DC changer the most according to claim 1 and 2, its
It is characterised by: described synchronization flyback DC/DC converter module includes multiple structure function identical synchronization flyback DC/DC
Changer, each synchronization flyback DC/DC changer includes transformator, primary MOSFET circuit, primary current sample circuit, secondary
MOSFET circuit, secondary current sample circuit；The lithium that transformer primary side one end is connected with current sync flyback DC/DC changer from
Sub-single battery anode is connected, and primary MOSFET circuit D end is connected with the former limit other end of transformator, primary current sampling electricity
One end, road is connected with primary MOSFET circuit S end, the primary current sample circuit other end and lithium-ions battery monomer negative terminal phase
Even, secondary one end of transformator is connected with lithium-ions battery group anode, and secondary MOSFET circuit D end is another with the secondary of transformator
One end is connected, and secondary current sample circuit one end is connected with secondary MOSFET circuit S end, the secondary current sample circuit other end and
Lithium-ions battery group negative terminal is connected, and primary MOSFET circuit G end, secondary MOSFET circuit G end are all with key control unit even
Connect；Primary MOSFET circuit G end, secondary MOSFET circuit G end receive charging instruction or the electric discharge that key control unit sends
Instruction, the former limit of transformator, secondary are charged according to charging instruction or electric discharge instruction or discharge, and wherein, are filling
During electricity, transformer secondary is charged enable by lithium-ions battery group, lithium-ions battery monomer is carried out by transformer primary side
Charging, when discharging, enables lithium-ions battery monomer and discharges transformer primary side, and transformer secondary is to lithium ion
Battery charging.
A kind of two-way active equalization circuit based on synchronization flyback DC/DC changer the most according to claim 1 and 2, its
It is characterised by: described key control unit calculates whole lithium ion electric power storage after receiving the monomer voltage of each lithium-ions battery
Pond group average monomer voltage, and then obtain monomer voltage and the lithium-ions battery group average monomer electricity of each lithium-ions battery
The difference of pressure, according to the monomer voltage of each lithium-ions battery and the difference of lithium-ions battery group average monomer voltage, each
The capacity voltage ratio of individual lithium-ions battery obtains the discharge and recharge carrying capacity that each lithium-ions battery needs, to each lithium ion
The carrying out of the discharge and recharge carrying capacity that accumulator needs judges, if the discharge and recharge carrying capacity that lithium-ions battery needs just is, then
When the synchronization flyback DC/DC changer connected according to discharge and recharge carrying capacity, current lithium-ions battery is calculated theoretical discharge
Between, then produce the high level signal that the persistent period is the theoretical discharge time and deliver to primary MOSFET circuit G end, secondary MOSFET
Circuit G end, wherein, first high level signal delivers to primary MOSFET circuit G end, has controlled current lithium-ions battery and has connected
Synchronization flyback DC/DC changer current lithium-ions battery is discharged until discharge time equal to the theoretical discharge time or
Person is calculated the discharge and recharge carrying capacity of the current lithium-ions battery of next collection period；
If lithium-ions battery need discharge and recharge carrying capacity be negative, then according to discharge and recharge carrying capacity absolute value, current lithium from
The synchronization flyback DC/DC changer that sub-accumulator connects is calculated the theoretical charging interval, and then the generation persistent period is theoretical
The high level signal in charging interval delivers to primary MOSFET circuit G end, secondary MOSFET circuit G end, and wherein, high level signal is first
First deliver to secondary MOSFET circuit G end, control the synchronization flyback DC/DC changer of current lithium-ions battery connection to current lithium
Ion accumulator is charged until the charging interval equal to the theoretical charging interval or is calculated the current lithium of next collection period
The discharge and recharge carrying capacity of ion accumulator；
If the discharge and recharge carrying capacity that lithium-ions battery needs is 0, do not operate, wait next collection calculated
Cycle discharge and recharge carrying capacity；Judge after receiving charge or discharge electric current, when charging current is more than charging current threshold value,
Control secondary MOSFET circuit G end in the synchronization flyback DC/DC changer that current charging current is corresponding to turn off, when discharge current is big
When discharging current threshold, control primary MOSFET circuit G end in the synchronization flyback DC/DC changer that present discharge electric current is corresponding
Turn off.
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| CN201610609615.3A CN106230045A (en) | 2016-07-28 | 2016-07-28 | A kind of based on the two-way active equalization circuit synchronizing flyback DC/DC changer |
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| CN201610609615.3A CN106230045A (en) | 2016-07-28 | 2016-07-28 | A kind of based on the two-way active equalization circuit synchronizing flyback DC/DC changer |
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| CN106230045A true CN106230045A (en) | 2016-12-14 |
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|---|---|---|---|
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106926741A (en) * | 2017-04-28 | 2017-07-07 | 胡楷 | New-energy automobile power-driven system and its battery electric quantity active equalization method |
| CN107658936A (en) * | 2017-10-20 | 2018-02-02 | 广州金升阳科技有限公司 | A kind of battery detection and equalizing system and its control method |
| CN107658935A (en) * | 2017-10-20 | 2018-02-02 | 广州金升阳科技有限公司 | A kind of battery detection and equalizing system and its control method |
| CN108539812A (en) * | 2018-04-11 | 2018-09-14 | 上海空间电源研究所 | High pressure lithium-ions battery equalizing circuit, equalization methods and accumulator |
| CN110783969A (en) * | 2018-07-27 | 2020-02-11 | 比亚迪股份有限公司 | Battery management system and battery system |
| CN112564231A (en) * | 2020-12-10 | 2021-03-26 | 上海空间电源研究所 | Lithium battery charging and discharging integrated device used on arrow |
| CN113346567A (en) * | 2021-03-22 | 2021-09-03 | 上海空间电源研究所 | Lithium ion storage battery monomer active equalization circuit for carrying |
| CN113541235A (en) * | 2021-06-03 | 2021-10-22 | 孙建宁 | Storage battery pack equalizing charge and discharge management system |
| CN114825407A (en) * | 2022-06-22 | 2022-07-29 | 锦浪科技股份有限公司 | Charging and discharging switching method, device, system and medium of bidirectional converter |
| CN107658936B (en) * | 2017-10-20 | 2024-11-15 | 广州金升阳科技有限公司 | Battery monitoring and balancing system and control method thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080073974A1 (en) * | 2006-09-21 | 2008-03-27 | Texas Instruments Incorporated | Method and circuit for cross regulation in a power converter |
| CN102222957A (en) * | 2011-06-21 | 2011-10-19 | 清华大学深圳研究生院 | Automatic battery capacity equalization circuit and implementing method thereof |
| CN103199589A (en) * | 2013-04-12 | 2013-07-10 | 哈尔滨工业大学 | Lithium ion battery pack modularization fast equalization circuit and equalizing method |
| CN103607004A (en) * | 2013-11-12 | 2014-02-26 | 珠海朗尔电气有限公司 | Storage battery packet bidirectional lossless equalization and pulse activation system |
| CN203788153U (en) * | 2014-03-31 | 2014-08-20 | 广州视源电子科技股份有限公司 | Over-power compensation circuit of flyback power supply |
| CN204030676U (en) * | 2014-08-15 | 2014-12-17 | 江苏金彭车业有限公司 | Intelligent accummulator charge equalizer |
| CN204144970U (en) * | 2013-11-29 | 2015-02-04 | 比亚迪股份有限公司 | Pwm signal generating apparatus and battery electric quantity active equalization control system |
| CN104795857A (en) * | 2015-03-23 | 2015-07-22 | 上海交通大学 | Lithium ion battery energy balance system and implementation method thereof |
-
2016
- 2016-07-28 CN CN201610609615.3A patent/CN106230045A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080073974A1 (en) * | 2006-09-21 | 2008-03-27 | Texas Instruments Incorporated | Method and circuit for cross regulation in a power converter |
| CN102222957A (en) * | 2011-06-21 | 2011-10-19 | 清华大学深圳研究生院 | Automatic battery capacity equalization circuit and implementing method thereof |
| CN103199589A (en) * | 2013-04-12 | 2013-07-10 | 哈尔滨工业大学 | Lithium ion battery pack modularization fast equalization circuit and equalizing method |
| CN103607004A (en) * | 2013-11-12 | 2014-02-26 | 珠海朗尔电气有限公司 | Storage battery packet bidirectional lossless equalization and pulse activation system |
| CN204144970U (en) * | 2013-11-29 | 2015-02-04 | 比亚迪股份有限公司 | Pwm signal generating apparatus and battery electric quantity active equalization control system |
| CN203788153U (en) * | 2014-03-31 | 2014-08-20 | 广州视源电子科技股份有限公司 | Over-power compensation circuit of flyback power supply |
| CN204030676U (en) * | 2014-08-15 | 2014-12-17 | 江苏金彭车业有限公司 | Intelligent accummulator charge equalizer |
| CN104795857A (en) * | 2015-03-23 | 2015-07-22 | 上海交通大学 | Lithium ion battery energy balance system and implementation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 刘福兵: "电动汽车锂离子电池组管理系统研究与实现", 《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》 * |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106926741A (en) * | 2017-04-28 | 2017-07-07 | 胡楷 | New-energy automobile power-driven system and its battery electric quantity active equalization method |
| CN107658936A (en) * | 2017-10-20 | 2018-02-02 | 广州金升阳科技有限公司 | A kind of battery detection and equalizing system and its control method |
| CN107658935A (en) * | 2017-10-20 | 2018-02-02 | 广州金升阳科技有限公司 | A kind of battery detection and equalizing system and its control method |
| CN107658936B (en) * | 2017-10-20 | 2024-11-15 | 广州金升阳科技有限公司 | Battery monitoring and balancing system and control method thereof |
| CN108539812A (en) * | 2018-04-11 | 2018-09-14 | 上海空间电源研究所 | High pressure lithium-ions battery equalizing circuit, equalization methods and accumulator |
| CN110783969B (en) * | 2018-07-27 | 2023-09-05 | 比亚迪股份有限公司 | Battery Management System and Battery System |
| CN110783969A (en) * | 2018-07-27 | 2020-02-11 | 比亚迪股份有限公司 | Battery management system and battery system |
| CN112564231A (en) * | 2020-12-10 | 2021-03-26 | 上海空间电源研究所 | Lithium battery charging and discharging integrated device used on arrow |
| CN112564231B (en) * | 2020-12-10 | 2024-08-23 | 上海空间电源研究所 | Lithium battery charging and discharging integrated device for arrow |
| CN113346567A (en) * | 2021-03-22 | 2021-09-03 | 上海空间电源研究所 | Lithium ion storage battery monomer active equalization circuit for carrying |
| CN113541235A (en) * | 2021-06-03 | 2021-10-22 | 孙建宁 | Storage battery pack equalizing charge and discharge management system |
| CN114825407B (en) * | 2022-06-22 | 2022-10-18 | 锦浪科技股份有限公司 | Charging and discharging switching method, device, system and medium of bidirectional converter |
| CN114825407A (en) * | 2022-06-22 | 2022-07-29 | 锦浪科技股份有限公司 | Charging and discharging switching method, device, system and medium of bidirectional converter |
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