CN107658935A - A kind of battery detection and equalizing system and its control method - Google Patents
A kind of battery detection and equalizing system and its control method Download PDFInfo
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- CN107658935A CN107658935A CN201710984588.2A CN201710984588A CN107658935A CN 107658935 A CN107658935 A CN 107658935A CN 201710984588 A CN201710984588 A CN 201710984588A CN 107658935 A CN107658935 A CN 107658935A
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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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Abstract
The invention discloses a kind of battery detection and equalizing system and its control method, equalizing circuit using can two-way operation it is chargeable also can the reversible transducer of feedback electric discharge improve equalization efficiency and reduce circuit loss；Opening and turning off using the direct controlling switch array of single-chip microprocessor MCU, realize that cell is directly sampled by analog-digital converter ADC, and the switching tube in reversible transducer is directly controlled by single-chip microprocessor MCU, so as to no longer need the control chip and peripheral components in sampling switch, equalizer switch and reversible transducer, number of switches can be reduced, simplify circuit, reduce circuit loss and cost；Control logic is very simple simultaneously, it is no longer necessary to special battery balanced chip；And equilibrium frontier inspection in side surveys the voltage of cell in equalization step, so as to realize the loop control to reversible transducer, equalization efficiency can be further improved.
Description
Technical field
The present invention relates to battery management, more particularly to by multiple batteries form battery pack battery detection and equalizing system and
Its control method.
Background technology
In recent years, increasing product uses lithium ion battery as main power source, mainly due to lithium ion battery
With small volume, energy density is high, memory-less effect, and cycle life is high, the advantages such as self-discharge rate is low；But lithium ion battery simultaneously
It is very high to charge-discharge power demand, when overcharge, cross put, overcurrent and when occurring situations such as short circuit, lithium ion battery pressure and heat are big
Amount increase, easily produce spark, burning even explode, therefore, lithium ion battery bar none all added with cross charge and discharge protecting
Circuit.In addition, when to one group of lithium ion battery discharge and recharge, it is contemplated that the inconsistency of each cell, equilibrium can be taken
Measure ensures safety and stability.
Balanced meaning is exactly to utilize electronic technology, lithium-ion battery monomer voltage deviation is maintained at expected scope
It is interior, so as to ensure that each cell is not damaged in normal use.If without Balance route, as discharge and recharge follows
The increase of ring, each monomer battery voltage gradually break up, and service life will reduce significantly.Universal solution is at present, using flying
Voltage sample function is realized in electric capacity sampling, realized using active equalization it is battery balanced, as TI companies EMB1428 and
EMB1499 chips can realize the two-way active equalization of battery pack multi-center selection, and the LTC3300 cores of Linear Techn Inc.
Piece can realize that battery pack carries out the two-way active charge balancing based on transformer.
Although these schemes can solve the problem that battery pack samples equalization function, but these chip periphery circuits need voluntarily to set
Count and peripheral circuit cost is very high, while sample circuit and equalizing circuit switch arrays substantial amounts, control logic are complicated, it is unfavorable
In being realized with a low cost and control.
Apply for artificial Shanghai University, Application No. 201610104589.9, entitled《A kind of common switch array
Battery sampling equalizing circuit》Chinese invention patent application propose a kind of battery sampling equalizing circuit of common switch array,
As shown in figure 1, including：Battery pack B1, B2 ... Bn, fly the flyback of capacitor sampling circuit C1, transformer M and diode D1 composition
Formula equalizing circuit, switch arrays K1, K2, K3, K4 ... K2n-1, K2n, analog-digital converter ADC and single-chip microprocessor MCU；Inverse-excitation type is equal
The circuit primary side that weighs termination battery pack high voltage end of the same name, different name end is grounded by metal-oxide-semiconductor Q；Inverse-excitation type equalizing circuit secondary passes through
Switch S3, S4 are connected on switch arrays；Fly capacitor sampling circuit electric capacity C1 one end to be connected on switch arrays, the other end passes through
S1 is switched, S2 is connected on analog-digital converter ADC, analog-digital converter ADC connection single-chip microprocessor MCUs, is realized by software to switch
Array is controlled.
The invention can realize winged capacitor sampling circuit and inverse-excitation type equalizing circuit switch arrays time-sharing multiplex, reduce circuit and open
Quantity, control logic complexity and manufacturing cost are closed, but following defect be present：
(1) circuit is needed by setting up a pair of sampling switch S1, S2 and a pair of equalizer switches S3, S4, by sampling
Switch, switch arrays and the disconnection of equalizer switch and closure, which are controlled, could realize battery sampling operation and battery balanced behaviour
Make, sampling switch and equalizer switch quantity share 4, and need to frequently cut off and close, and circuit cost is still higher, circuit damage
Consumption is also larger.
(2) circuit sampling operation and battery balanced operation are separately carried out, and circuit operating efficiency is low.
(3) circuit employs inverse-excitation type equalizing circuit, and battery balanced is to carry out energy supplement to the minimum battery of voltage,
Can only one-way only operation, be unfavorable for improve circuit operating efficiency.
The content of the invention
Have in view of that, the technical problem to be solved in the present invention is to provide a kind of battery detection and equalizing system and its controlling party
Method, number of switches can be reduced, reduce circuit loss, and circuit control logic is very simple, circuit conditioning efficiency high, without special
Battery balanced chip.
The invention solves the technical scheme of above-mentioned technical problem is as follows：
A kind of battery detection and equalizing system, including battery pack, switch arrays, analog-digital converter, reversible transducer and list
Piece machine；Battery pack include cell B1, B2 ... and Bn；Switch arrays include switch K11, K12, K21, K22 ..., Kn1 and
Kn2；Reversible transducer includes the first side anode, the first side negative terminal, the second side anode, the second side negative terminal, the first control terminal, second
Control terminal, isolating transformer, switching tube Q1, switching tube Q2 and isolation；The first side of isolating transformer winding different name end is the first side
Anode, isolating transformer the first side Motor Winding Same Name of Ends form the first side negative terminal after switching tube Q1, the side of isolating transformer second around
Group Same Name of Ends is the second side anode, and the second side of isolating transformer winding different name end forms the second side negative terminal after switching tube Q2, opened
The control pole for closing pipe Q1 forms the first control terminal, switching tube Q2 control extremely the second control terminal after isolation；It is characterized in that：
Cell B1, B2 ..., Bn positive pole by switch K11, K21 ..., Kn1 be connected to the second of reversible transducer
Side anode, cell B1, B2 ..., Bn negative pole by switch K12, K22 ..., Kn2 be connected to the second of reversible transducer
Side negative terminal；
Second side anode of reversible transducer and switch K11, K21 ..., the tie point of Kn1 and analog-digital converter be connected, it is double
The second side negative terminal and switch K12, K22 to converter ..., the tie point of Kn2 and analog-digital converter be connected, reversible transducer
First side anode and the positive pole of battery pack connect, and the first side negative terminal of reversible transducer and the negative pole of battery pack connect, two-way change
The control terminal of parallel operation is connected with single-chip microcomputer；
Switch K11, K12, K21, K22 ..., Kn1, Kn2 control terminal connection single-chip microcomputer；
Analog-digital converter is used for：(1) sample cell B1, B2 ..., Bn voltage；(2) list to be equalized is monitored in real time
The voltage at body battery both ends, until the cell and the other battery voltage balanceds of battery pack；
Reversible transducer be used for cell B1, B2 ..., Bn voltage carry out it is balanced；
Single-chip microcomputer is used for：(1) successively gating switch K11, K12, K21, K22 ..., Kn1, Kn2, realize analog-digital converter according to
It is secondary to cell B1, B2 ..., Bn voltage samples；(2) according to analog-digital converter sampling cell B1, B2 ...,
Bn voltage results control reversible transducer performs electric voltage equalization work；(3) monitored in real time according to analog-digital converter to be equalized
The voltage results at cell both ends determine that equal reversible transducer performs whether electric voltage equalization work terminates, and realizes reversible transducer
To cell B1, B2 ..., Bn voltage carry out it is balanced.
Preferably, single-chip microcomputer and analog-digital converter and battery pack are floating connection.
Preferably, switch K11 and K12, switch K21 and K22 ... and switch Kn1 and Kn2 be coordinated signals.
The control method of above-mentioned balance control system, comprises the following steps：
(1) sampling step：Simultaneously controlling switch pipe Q2 is turned off simultaneously for single-chip microcomputer controlling switch pipe Q1 shut-offs, then controlling switch
Array gate successively cell B1, B2 ..., Bn, analog-digital converter (ADC) sample successively each cell B1, B2 ..., Bn
Voltage, single-chip microcomputer according to each cell B1, B2 ..., Bn voltage, determine cell to be equalized, while determine pair
Cell to be equalized should perform charge balancing step or equalization discharge step；
(2) equalization step, one of the following two kinds situation is performed according to step (1)：
(2.1) charge balancing step：Single-chip microcomputer output pwm signal controlling switch pipe Q1 and switching tube Q2, switching tube Q1 works
For energy input side switching tube, switching tube Q2 as energy outlet side synchronous rectifier, control energy from reversible transducer the
Side flows to the second side and charged to cell to be equalized, while analog-digital converter monitors cell two to be equalized in real time
The voltage at end, single-chip microcomputer determine whether charge balancing step terminates according to the voltage, until the cell and battery pack are other
Battery voltage balanced；
(2.2) equalization discharge step：Single-chip microcomputer output pwm signal controlling switch pipe Q1 and switching tube Q2, switching tube Q2 works
For energy input side switching tube, switching tube Q1 as energy outlet side synchronous rectifier, control energy from reversible transducer the
Two effluents discharge to the first side to cell to be equalized, while analog-digital converter monitors cell two to be equalized in real time
The voltage at end, single-chip microcomputer determine whether equalization discharge step terminates according to the voltage, until the cell and battery pack are other
Battery voltage balanced；
Repeat the above steps (1)-(2).
Preferably, single-chip microcomputer controlling switch pipe Q1 and switching tube Q2 are turned off in step (1), and reversible transducer is without energy
Transmit so that the second side anode, the second side negative terminal are in externally direct current high impedance.
The present invention is more existing to be sampled using winged electric capacity to realize voltage sample, realize battery using unidirectional anti exciting converter
Equilibrium proposes a kind of brand-new technical concept, there is beneficial effect prominent as follows relative to prior art：
(1) opening and turning off using the direct controlling switch array of single-chip microcomputer, realize that cell is directly turned by modulus
Parallel operation is sampled, and the switching tube in reversible transducer is directly controlled by single-chip microcomputer, so as to no longer need sampling switch,
Control chip and peripheral components in weighing apparatus switch and reversible transducer, number of switches can be reduced, simplify circuit, reduce circuit loss
And cost；
(2) control logic of system is very simple, it is no longer necessary to special battery balanced chip；
(3) equilibrium frontier inspection in side surveys the voltage of cell in equalization step, so as to realize the loop to DC/DC converters
Control, can improve equalization efficiency；
(4) employ reversible transducer as equalizing circuit, energy can the two-way flow between the first side and the second side, because
This can charge, and and can electric discharge, be advantageous to further improve equalization efficiency；
(5) equalizing circuit uses reversible transducer, can realize during equalization discharge and return the energy of the high cell of voltage
Battery pack is fed to, is advantageous to further reduce circuit loss.
Brief description of the drawings
The existing battery equalization systems of Fig. 1；
The theory diagram of Fig. 2 present invention.
Embodiment
The inventive concept of the present invention is the control function for making full use of single-chip microprocessor MCU powerful, cuts hardware quantity, simplifies system
System structure, reduces circuit loss and cost, and optimizes equalizing circuit and control strategy, improves compatibility, the equalization efficiency of system
And circuit loss is further reduced, specifically including above-mentioned beneficial effect (1) (2), (3), (4) and (5), will not be described here.
Fig. 2 is the theory diagram of the present invention, and Fig. 2 is in order to embody the integrality of system application scenarios, by isolation bus transmitting-receiving
Device, bus B US have also carried out drawing displaying.
Battery balanced control system of the invention includes in Fig. 2：Battery pack 101, switch arrays 102, analog-digital converter
ADC, reversible transducer 103 and single-chip microprocessor MCU；Battery pack 101 include cell B1, B2 ... and Bn；Switch arrays 102 wrap
Include switch K11, K12, K21, K22 ..., Kn1 and Kn2；Reversible transducer include the first side anode V1+, the first side negative terminal V1-,
Second side anode V2+, the second side negative terminal V2-, the first control terminal, the second control terminal, isolating transformer M, switching tube Q1, switching tube
Q2 and isolation；The first sides of isolating transformer M winding different name end is the first side anode V1+, and the first sides of isolating transformer M winding is of the same name
End forms the first side negative terminal V1- after switching tube Q1, and the second sides of isolating transformer M Motor Winding Same Name of Ends is the second side anode V2+, every
The second side negative terminal V2- is formed after switching tube Q2 from the second sides of transformer M winding different name end, switching tube Q1 control pole is through isolation
After form the first control terminal, switching tube Q2 control extremely the second control terminal；Cell B1, B2 ..., Bn positive pole is by opening
Close K11, K21 ..., Kn1 be connected to the second side anode V2+ of reversible transducer 103, cell B1, B2 ..., Bn negative pole
By switch K12, K22 ..., Kn2 be connected to the second side negative terminal V2- of reversible transducer 103；The second of reversible transducer 103
Side anode V2+ and switch K11, K21 ..., Kn1 and analog-digital converter ADC tie point be connected, the second of reversible transducer 103
Side negative terminal V2- and switch K12, K22 ..., Kn2 and analog-digital converter ADC tie point be connected, the first of reversible transducer 103
Side anode V1+ is connected with the positive pole of battery pack 101, the first side negative terminal V1- of reversible transducer 103 and the negative pole of battery pack 101
Connection, the first control terminal and the second control terminal of reversible transducer 103 are connected with single-chip microprocessor MCU；Switch K11, K12, K21,
K22 ..., Kn1, Kn2 control terminal connection single-chip microprocessor MCU；Single-chip microprocessor MCU and analog-digital converter ADC and battery pack 101 are floating ground
Connection, i.e., after a certain cell gates, the negative pole of this cell and single-chip microprocessor MCU and analog-digital converter ADC's is public
Reference ground connects.MCU and battery pack are non-isolated bind modes, generally require and are powered using insulating power supply to MCU.
Wherein：
Analog-digital converter ADC is used for：(1) sample cell B1, B2 ..., Bn voltage；(2) monitor in real time to be equalized
Cell both ends voltage, until the cell and the other battery voltage balanceds of battery pack；
Reversible transducer 103 be used for cell B1, B2 ..., Bn voltage carry out it is balanced；
Single-chip microprocessor MCU is used for：(1) successively gating switch K11, K12, K21, K22 ..., Kn1, Kn2, realize analog-to-digital conversion
Device ADC successively to cell B1, B2 ..., Bn voltage samples；(2) according to analog-digital converter ADC sampling cells
B1, B2 ..., the control work of reversible transducer 103 of Bn voltage results perform electric voltage equalization；(3) it is real according to analog-digital converter ADC
When monitor the voltage results at cell both ends to be equalized and determine that equal reversible transducer 103 performs whether electric voltage equalization work ties
Beam, realize reversible transducer 103 to cell B1, B2 ..., Bn voltage carry out it is balanced；
Single-chip microprocessor MCU and analog-digital converter ADC are advantageous in that so that battery need not be limited with the floating connection of battery pack 101
Battery pack serial number.
Common isolation scheme can use light-coupled isolation, magnetoelectricity isolation or Capacitor apart in Fig. 2 reversible transducers 103
Deng where not being the innovative point of the present invention, therefore being not described here in detail.
Shown in Fig. 2 reversible transducers 103 is only basic topology, is not included to ensure the absorption of circuit works fine electricity
Road and protection circuit etc., these are all that those skilled in the art easily realizes, be will not be described here.
The control method of Fig. 2 theory diagrams, comprises the following steps：
(1) sampling step：Single-chip microprocessor MCU controlling switch pipe Q1 shut-offs and simultaneously controlling switch pipe Q2 shut-offs, are then controlled
Switch arrays gate successively cell B1, B2 ..., Bn, analog-digital converter ADC sample successively each cell B1, B2 ...,
Bn voltage, single-chip microprocessor MCU according to each cell B1, B2 ..., Bn voltage, determine cell to be equalized, while really
It is fixed that charge balancing step or equalization discharge step should be performed to cell to be equalized；
(2) equalization step, one of the following two kinds situation is performed according to step (1)：
(2.1) charge balancing step：Single-chip microcomputer output pwm signal controlling switch pipe Q1 and switching tube Q2, switching tube Q1 works
For energy input side switching tube, switching tube Q2 controls energy from reversible transducer 103 as energy outlet side synchronous rectifier
First effluent charges to the second side to cell to be equalized, while analog-digital converter monitors cell to be equalized in real time
The voltage at both ends, single-chip microprocessor MCU determine whether charge balancing step terminates according to the voltage, until the cell and battery pack
Other battery voltage balanceds；
(2.2) equalization discharge step：Single-chip microcomputer output pwm signal controlling switch pipe Q1 and switching tube Q2, switching tube Q2 works
For energy input side switching tube, switching tube Q1 controls energy from reversible transducer 103 as energy outlet side synchronous rectifier
Second effluent discharges to the first side to cell to be equalized, while analog-digital converter monitors cell to be equalized in real time
The voltage at both ends, single-chip microprocessor MCU determine whether equalization discharge step terminates according to the voltage, until the cell and battery pack
Other battery voltage balanceds；
Repeat the above steps (1)-(2).
The present invention directly by single-chip microprocessor MCU controlling switch K11 and K12, K21 and K22 ... and Kn1 and Kn2 open with
Shut-off, realize each cell B1, B2 of step (1) ..., Bn and analog-digital converter ADC be connected and disconnected from, realization selects successively
Open the cell for needing to sample；And realize step (2.1) and (2.2) each cell B1, B2 to be equalized ..., Bn with
Reversible transducer 103 is connected and disconnected from, and realizes that the connection work(of charge and discharge balancing between cell and battery pack is opened in selection
Energy.
Due to switch K11 and K12, K21 and K22 ... and Kn1 and Kn2 opens synchronous with shut-off, therefore is arranged to link
The uniformity of the mode system of control will be more preferable.
The present invention is due to single-chip microprocessor MCU controlling switch pipe Q1 and switching tube Q2 shut-off, reversible transducer 103 in step (1)
Without energy transmission so that the second side anode V2+, the second side negative terminal V2- are in externally direct current high impedance, so as to not influence modulus
Converter ADC samples monomer battery voltage.
It should be noted that single-chip microprocessor MCU controlling switch pipe Q1 and opened during the present invention is implemented, in step (2.1), (2.2)
It is same for cycle phase to close pipe Q2 two groups of pwm signals, opposite polarity signal.The preferred conducting energy of reversible transducer 103 of job order
Input side switching tube is measured, turns off energy outlet side synchronous rectifier, the isolating transformer M energy storage to reversible transducer 103；Then
Turn off energy input side switching tube, conducts energy outlet side synchronous rectifier, by the isolating transformer M's of reversible transducer 103
Energy storage is discharged into energy outlet side, reaches the purpose of energy drag and isolated variable.This for a person skilled in the art,
It is the common knowledge about reversible transducer.
It the above is only the preferred embodiment of the present invention, it is noted that above-mentioned preferred embodiment is not construed as pair
The limitation of the present invention, protection scope of the present invention should be defined by claim limited range.For the art
For those of ordinary skill, without departing from the spirit and scope of the present invention, some improvements and modifications can also be made, these change
Enter and retouch and also should be regarded as protection scope of the present invention.
Claims (5)
1. a kind of battery detection and equalizing system, including it is battery pack (101), switch arrays (102), analog-digital converter (ADC), double
To converter (103) and single-chip microcomputer (MCU)；Battery pack (101) include cell B1, B2 ... and Bn；Switch arrays (102)
Including switch K11, K12, K21, K22 ..., Kn1 and Kn2；Reversible transducer includes the first side anode (V1+), the first side negative terminal
(V1-), the second side anode (V2+), the second side negative terminal (V2-), the first control terminal, the second control terminal, isolating transformer (M), open
Close pipe Q1, switching tube Q2 and isolation；The first side of isolating transformer (M) winding different name end is the first side anode (V1+), isolates transformation
The side Motor Winding Same Name of Ends of device (M) first forms the first side negative terminal (V1-), the side winding of isolating transformer (M) second after switching tube Q1
Same Name of Ends is the second side anode (V2+), and the second side of isolating transformer (M) winding different name end forms the second side after switching tube Q2 and born
Hold (V2-), switching tube Q1 control pole forms the first control terminal, switching tube Q2 control extremely the second control terminal after isolation；
It is characterized in that：
Cell B1, B2 ..., Bn positive pole by switch K11, K21 ..., Kn1 be connected to the of reversible transducer (103)
Two side anodes (V2+), cell B1, B2 ..., Bn negative pole by switch K12, K22 ..., Kn2 be connected to reversible transducer
(103) the second side negative terminal (V2-)；
Second side anode (V2+) of reversible transducer (103) and switch K11, K21 ..., the company of Kn1 and analog-digital converter (ADC)
Contact connects, the second side negative terminal (V2-) of reversible transducer (103) and switch K12, K22 ..., Kn2 and analog-digital converter
(ADC) tie point connection, the first side anode (V1+) of reversible transducer (103) is connected with the positive pole of battery pack (101), double
It is connected to the first side negative terminal (V1-) of converter (103) with the negative pole of battery pack (101), the first control of reversible transducer (103)
End processed and the second control terminal are connected with single-chip microcomputer (MCU)；
Switch K11, K12, K21, K22 ..., Kn1, Kn2 control terminal connection single-chip microcomputer (MCU)；
Analog-digital converter (ADC) is used for：(1) sample cell B1, B2 ..., Bn voltage；(2) monitor in real time to be equalized
The voltage at cell both ends, until the cell and the other battery voltage balanceds of battery pack；
Reversible transducer (103) be used for cell B1, B2 ..., Bn voltage carry out it is balanced；
Single-chip microcomputer (MCU) is used for：(1) successively gating switch K11, K12, K21, K22 ..., Kn1, Kn2, realize analog-digital converter
(ADC) successively to cell B1, B2 ..., Bn voltage samples；(2) according to analog-digital converter (ADC) sampling monomer electricity
Pond B1, B2 ..., Bn voltage results determine cell to be equalized, control reversible transducer (103) performs electric voltage equalization work
Make；(3) voltage results for monitoring cell both ends to be equalized in real time according to analog-digital converter (ADC) determine equal two-way changing
Device (103) performs whether electric voltage equalization work terminates, realize reversible transducer (103) to cell B1, B2 ..., Bn electricity
Pressure carries out balanced.
2. battery detection according to claim 1 and equalizing system, it is characterised in that：Single-chip microcomputer (MCU) and analog-to-digital conversion
Device (ADC) and battery pack (101) are floating connection.
3. battery detection according to claim 1 and equalizing system, it is characterised in that：Switch K11 and K12, switch K21 and
K22 ... and switch Kn1 and Kn2 is coordinated signals.
4. the control method of the battery detection and equalizing system described in claim 1, it is characterised in that comprise the following steps：
(1) sampling step：Single-chip microcomputer (MCU) controlling switch pipe Q1 shut-offs and simultaneously controlling switch pipe Q2 shut-offs, then control are opened
Close array (102) gate successively cell B1, B2 ..., Bn, analog-digital converter (ADC) sample successively each cell B1,
B2 ..., Bn voltage, single-chip microcomputer (MCU) according to each cell B1, B2 ..., Bn voltage, determine monomer electricity to be equalized
Pond, while determine that cell to be equalized should be performed charge balancing step or equalization discharge step；
(2) equalization step, one of the following two kinds situation is performed according to step (1)：
(2.1) charge balancing step：Single-chip microcomputer (MCU) output pwm signal controlling switch pipe Q1 and switching tube Q2, switching tube Q1 works
For energy input side switching tube, switching tube Q2 as energy outlet side synchronous rectifier, control energy from reversible transducer the
Side flows to the second side and charged to cell to be equalized, while analog-digital converter (ADC) monitors monomer to be equalized in real time
The voltage at battery both ends, single-chip microcomputer (MCU) determine whether charge balancing step terminates according to the voltage, until the cell with
The other battery voltage balanceds of battery pack；
(2.2) equalization discharge step：Single-chip microcomputer (MCU) output pwm signal controlling switch pipe Q1 and switching tube Q2, switching tube Q2 works
For energy input side switching tube, switching tube Q1 as energy outlet side synchronous rectifier, control energy from reversible transducer the
Two effluents discharge to the first side to cell to be equalized, while analog-digital converter (ADC) monitors monomer to be equalized in real time
The voltage at battery both ends, single-chip microcomputer (MCU) determine whether equalization discharge step terminates according to the voltage, until the cell with
The other battery voltage balanceds of battery pack；
Repeat the above steps (1)-(2).
5. the control method of the battery detection and equalizing system described in claim 4, it is characterised in that：Single-chip microcomputer in step (1)
(MCU) controlling switch pipe Q1 and switching tube Q2 shut-offs, reversible transducer (103) is without energy transmission so that the second side anode
(V2+), the second side negative terminal (V2-) is in externally direct current high impedance.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108899970A (en) * | 2018-09-06 | 2018-11-27 | 杭州高特电子设备股份有限公司 | A kind of two-way active equalization management system for protecting startup power supply |
| CN109004709A (en) * | 2018-08-01 | 2018-12-14 | 乐普医学电子仪器股份有限公司 | A kind of high voltage charge circuit of variable connector switching control |
| CN110239396A (en) * | 2019-06-26 | 2019-09-17 | 山东大学 | Battery pack balancing module, system and control method based on two-way flyback converter |
| CN110341552A (en) * | 2019-08-14 | 2019-10-18 | 惠州汇能精电科技有限公司 | Battery balanced control system and energy storage device |
| CN110729789A (en) * | 2019-10-24 | 2020-01-24 | 河南理工大学 | Series battery pack equalization circuit and equalization method based on flyback converter |
| CN112865232A (en) * | 2021-01-14 | 2021-05-28 | 哈尔滨工业大学（深圳） | Active battery pack equalization circuit and control method |
| CN116505632A (en) * | 2023-06-30 | 2023-07-28 | 西安为光能源科技有限公司 | Battery charging and discharging circuit and control system and method |
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| CN108899970A (en) * | 2018-09-06 | 2018-11-27 | 杭州高特电子设备股份有限公司 | A kind of two-way active equalization management system for protecting startup power supply |
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| CN110239396B (en) * | 2019-06-26 | 2021-09-17 | 山东大学 | Battery pack balancing module, system and control method based on bidirectional flyback converter |
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| CN110729789A (en) * | 2019-10-24 | 2020-01-24 | 河南理工大学 | Series battery pack equalization circuit and equalization method based on flyback converter |
| CN112865232A (en) * | 2021-01-14 | 2021-05-28 | 哈尔滨工业大学（深圳） | Active battery pack equalization circuit and control method |
| CN116505632A (en) * | 2023-06-30 | 2023-07-28 | 西安为光能源科技有限公司 | Battery charging and discharging circuit and control system and method |
| CN116505632B (en) * | 2023-06-30 | 2023-09-15 | 西安为光能源科技有限公司 | Battery charging and discharging circuit and control system and method |
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