CN109347183A - A kind of active equalization charge protection device, method and charging unit - Google Patents
A kind of active equalization charge protection device, method and charging unit Download PDFInfo
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- CN109347183A CN109347183A CN201811550229.7A CN201811550229A CN109347183A CN 109347183 A CN109347183 A CN 109347183A CN 201811550229 A CN201811550229 A CN 201811550229A CN 109347183 A CN109347183 A CN 109347183A
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000005070 sampling Methods 0.000 claims abstract description 54
- 230000005611 electricity Effects 0.000 claims description 15
- 230000001681 protective effect Effects 0.000 claims description 6
- 230000009466 transformation Effects 0.000 claims 1
- 230000008569 process Effects 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 235000013399 edible fruits Nutrition 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
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Classifications
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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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
-
- H02J7/0077—
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
A kind of active equalization charge protection device provided by the invention, method and charging unit, the active equalization charge protection device includes: sample circuit, comparison circuit, controller and charging control circuit, by sampling charging voltage, the charging voltage of sampling is compared with predeterminated voltage using comparison circuit, when the charging voltage of sampling is greater than predeterminated voltage, the control signal of controller output response is to charging control circuit, stop battery pack balancing, over-voltage is prevented to charge, when the charging voltage of sampling is less than predeterminated voltage, holding charges to battery pack, it through the invention can be with the over-voltage charging problems of effective solution battery pack to ensure that charging voltage is no more than setting value, guarantee the equalizaing charge safety of battery pack.
Description
Technical field
The present invention relates to charging technique fields, in particular to a kind of active equalization charge protection device, method and fill
Electric installation.
Background technique
With the development of lithium battery group, many electric cars are increasing to rate of charge requirement, during use
Battery pack can be because a variety of causes (mainly temperature) gradually decays, this is the characteristic of battery pack.The decaying of this part can not lead to
Equilibrium is crossed to retrieve.And it is most important the reason is that system loss caused by battery capacity is unbalanced to cause power system capacity to decline.
Traditional passive equilibrium is difficult to meet making up for consistency of battery pack, and active equalization mode is more and more applied, but is being answered
With how to protect battery core in the process, more stringent requirements are proposed, needs hardware-software while controlling, to guarantee the charge and discharge of battery pack
The safety of electricity.
Summary of the invention
In view of this, the embodiment of the present invention is designed to provide a kind of active equalization charge protection device, method and fills
Electric installation, to improve the case where existing battery pack active equalization charging process is easy to happen over-voltage.
The technical solution adopted by the invention is as follows:
The present invention provides a kind of active equalization charge protection device, the active equalization charge protection device is for preventing
Battery pack over-voltage charging, the active equalization charge protection device includes: sample circuit, is electrically connected with battery pack, for sampling
The charging voltage of the battery pack；Comparison circuit is electrically connected with the sample circuit, for filling the sampling circuit samples
Piezoelectric voltage is compared generation comparison result with predeterminated voltage；Controller is electrically connected with the comparison circuit, for according to
The corresponding control signal of comparison result output that comparison circuit obtains is to charging control circuit, when the charging voltage of the sampling is big
When predeterminated voltage, the control signal is to stop charging signals, when the charging voltage of the sampling is less than predeterminated voltage, institute
Control signal is stated as starting charging signals；Charging control circuit is electrically connected with the controller, and is also electrically connected with battery pack, for connecting
Charge power supply is connect to charge to battery pack according to the control signal of the controller.
Further, the comparison circuit includes comparator, and the non-inverting input terminal of the comparator is for introducing default electricity
Signal is pressed, the reverse input end of the comparator is connect with the sample circuit, for accessing the charging voltage of the sampling,
The output end of the comparator is electrically connected with the controller, and the comparator is used for the charging voltage of the sampling and presets
Voltage is compared generation comparison result, and comparison result is sent to the controller.
Further, the comparison circuit includes first resistor, second resistance and DC power supply, the DC power supply according to
Secondary to be then grounded forming circuit by first resistor, second resistance, the non-inverting input terminal of the comparator is connected to described first
Between resistance and the second resistance.
Further, the sample circuit includes the 4th resistance and the 5th resistance, and the battery pack includes output port, institute
The output port for stating battery pack passes sequentially through the 4th resistance, the 5th resistance and then is grounded forming circuit, the sample circuit
Including sampled point, the sampled point is set between the 4th resistance and the 5th resistance.
Further, the charging control circuit includes first switch tube and transformer, and the first switch tube includes control
End, first end and second end processed, charge power supply are electrically connected by the first end of the primary side and the first switch tube of the transformer
It connects, the second end of the first switch tube and ground connection, the control terminal of the first switch tube are electrically connected with the controller, are used for
First end and second end on or off are controlled under the control signal of the controller, so that charging control circuit starting charging
Or stop charging.
Further, the duration for stopping charging signals is 5s.
Further, the controller is single-chip microcontroller.
The present invention also provides a kind of active equalization charge protection method, the active equalization charge protection method is applied to
Active equalization charge protection device, the active equalization charge protection device include sample circuit, comparison circuit, controller and
Charging control circuit, which comprises sampling circuit samples obtain the charging voltage of battery pack, and the charging that sampling is obtained
Voltage is sent to the comparison circuit；The comparison circuit is tied compared with the charging voltage is compared generation with predeterminated voltage
Fruit, and the comparison result is sent to controller；The controller generates corresponding control signal according to the comparison result
And by the control signal to the charging control circuit；The charging control circuit according to the control signal to battery pack into
Row charging.
Further, when the comparison result is that charging voltage is greater than predeterminated voltage, the control signal is to stop filling
Electric signal；When the comparison result is to educate predeterminated voltage under charging voltage, the control signal is starting charging signals.
The present invention also provides a kind of charging unit, the charging unit includes above-mentioned active equalization charge protection device
Compared with the prior art, the invention has the following advantages:
A kind of active equalization charge protection device, method and charging unit provided by the invention, the active equalization charging
Protective device includes: sample circuit, is electrically connected with battery pack, for sampling the charging voltage of the battery pack；Comparison circuit, with
The sample circuit electrical connection, compared with the charging voltage of the sampling circuit samples is compared generation with predeterminated voltage
As a result；Controller is electrically connected with the comparison circuit, and the comparison result output for being obtained according to the comparison circuit is corresponding
Signal is controlled to charging control circuit, when the charging voltage of the sampling is greater than predeterminated voltage, the control signal is to stop
Charging signals, when the charging voltage of the sampling is less than predeterminated voltage, the control signal is starting charging signals；Charging control
Circuit processed, is electrically connected with the controller, and is also electrically connected with battery pack, is believed for connecting charge power supply according to the control of the controller
It number charges to battery pack.By sampling charging voltage, the charging voltage of sampling is compared with predeterminated voltage, works as sampling
Charging voltage when being greater than predeterminated voltage, stop battery pack balancing, over-voltage prevented to charge, when the charging voltage of sampling be less than it is default
When voltage, holding charges to battery pack, through the invention can be with the over-voltage charging problems of effective solution battery pack with true
It protects charging voltage and is no more than setting value, guarantee the equalizaing charge safety of battery pack.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate
Appended attached drawing, is described in detail below.
Detailed description of the invention
It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of embodiment of the present invention
Attached drawing be briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not to be seen as
It is the restriction to range, it for those of ordinary skill in the art, without creative efforts, can be with root
Other relevant attached drawings are obtained according to these attached drawings.
Fig. 1 shows a kind of active equalization charge protector schematic diagram provided by the present invention.
Fig. 2 shows the schematic diagrames of comparison circuit.
Fig. 3 shows the schematic diagram of charging control circuit.
Fig. 4 shows a kind of flow chart of active equalization charge protection method provided by the present invention.
Icon: 100- active equalization charge protection device；110- sample circuit；120- comparison circuit；130- controller；
140- charging control circuit；U1- comparator；R1- first resistor；R2- second resistance；The 4th resistance of R4-；The 5th resistance of R5-；
Q1- first switch tube；T- transformer；200- battery.
Specific embodiment
Below in conjunction with attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete
Ground description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Usually exist
The component of the embodiment of the present invention described and illustrated in attached drawing can be arranged and be designed with a variety of different configurations herein.Cause
This, is not intended to limit claimed invention to the detailed description of the embodiment of the present invention provided in the accompanying drawings below
Range, but it is merely representative of selected embodiment of the invention.Based on the embodiment of the present invention, those skilled in the art are not doing
Every other embodiment obtained under the premise of creative work out, shall fall within the protection scope of the present invention.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " connected " " connects
Connect " it shall be understood in a broad sense, for example, it may be being fixedly connected, it may be a detachable connection, or be integrally connected；It can be machine
Tool connection, is also possible to be electrically connected；It can be directly connected, two members can also be can be indirectly connected through an intermediary
Connection inside part.
In the description of the present invention, it is also necessary to explanation, herein, such as first and second or the like relationship art
Language is only used to distinguish one entity or operation from another entity or operation, without necessarily requiring or implying this
There are any actual relationship or orders between a little entities or operation.The terms "include", "comprise" or its it is any its
He is intended to non-exclusive inclusion by variant, so that the process, method, article or equipment including a series of elements is not
Only include those elements, but also including other elements that are not explicitly listed, or further include for this process, method,
Article or the intrinsic element of equipment.In the absence of more restrictions, being wanted by what sentence "including a ..." limited
Element, it is not excluded that there is also other identical elements in the process, method, article or apparatus that includes the element.For
For those skilled in the art, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
With reference to the accompanying drawing, it elaborates to some embodiments of the present invention.In the absence of conflict, following
Feature in embodiment and embodiment can be combined with each other.
First embodiment
Referring to Fig. 1, a kind of active equalization charge protection device 100 is present embodiments provided, the active equalization charging
Protective device 100 is for preventing 200 over-voltage of battery pack to charge, it is possible to understand that ground, battery pack 200 include multiple battery cells.Institute
Stating active equalization charge protection device 100 includes: sample circuit 110, comparison circuit 120, controller 130 and charging control circuit
140。
Wherein, sample circuit 110 are electrically connected with battery pack 200, are also electrically connected with comparator U1, for sampling the electricity
The charging voltage of pond group 200, and the charging voltage for the battery pack 200 that sampling obtains is sent to comparator U1.
In this present embodiment, the sample circuit 110 includes the 4th resistance R4 and the 5th resistance R5, the battery pack 200
Including output port, the output port of the battery pack 200 passes sequentially through the 4th resistance R4, the 5th resistance R5 and is then grounded
Forming circuit.The sample circuit 110 includes sampled point CELL, and the sampled point CELL is set to the 4th resistance R4 and institute
It states between the 5th resistance R5.It is to be appreciated that the voltage collected of sample circuit 110 is the charging voltage or electricity of battery pack 200
Partial pressure of group 200 voltage in pond on the 5th resistance R5.That is R5*Ucell/ (R4+R5), wherein Ucell is filling for battery pack 200
Piezoelectric voltage.The voltage signal that sampling obtains is transmitted to comparison circuit 120 by sample circuit 110.
Fig. 1 and Fig. 2 is please referred to, comparison circuit 120 is electrically connected with the sample circuit 110, is used for the sample circuit
The charging voltage of 110 samplings is compared generation comparison result with predeterminated voltage；The comparison circuit 120 includes comparator U1,
The non-inverting input terminal of the comparator U1 for introducing predeterminated voltage signal, the comparison circuit 120 further include first resistor R1,
The DC power supply of second resistance R2 and predeterminated voltage, it is right that the DC power supply passes sequentially through first resistor R1, second resistance R2
Be formed into a loop with being followed by, the non-inverting input terminal of the comparator U1 be connected to the first resistor R1 and the second resistance R2 it
Between, the reverse input end of the comparator U1 is connect with the sample circuit 110, for accessing the charging electricity of the sampling
Pressure.
In this present embodiment, the reverse input end of comparator U1 is electrically connected with the sampled point CELL of sample circuit 110, namely
It is to say, the non-inverting input terminal connection of the U-=R5*Ucell/ (R4+R5) of the reverse input end of comparator U1, the comparator U1
Between first resistor R1 and second resistance R2, it is possible to understand that ground, the voltage of the non-inverting input terminal of comparator U1 are U+=R2*
Vcc/ (R1+R2), comparator U1 can obtain filling for battery pack 200 according to non-inverting input terminal compared with the voltage of reverse input end
The size relation of piezoelectric voltage and predeterminated voltage VCC.
The output end TZ1 of the comparator U1 is electrically connected with the controller 130, and the comparator U1 by described for adopting
The charging voltage of sample is compared generation comparison result with predeterminated voltage, and comparison result is sent to the controller 130, than
Relatively result includes: that the charging voltage of sampling is greater than the charging voltage of predeterminated voltage or sampling less than predeterminated voltage.
For example, predeterminated voltage Vcc=3.3V, first resistor R1R1=2K, second resistance R2R2=10K, the 4th resistance
R4R4=10K, the 5th resistance R5R5=10K, CELL signal are the 1/2Ucell of charging voltage, that is, have following operation U+=
10K*3.3V/ (2K+10K)=2.75V, when the reverse input end voltage of comparator U1 is less than 2.75V and charging voltage is less than
When predeterminated voltage VCC, the output end TZ1 of comparator U1 exports high level, when the reverse input end voltage of comparator U1 is greater than
When 2.75V, i.e., when charging voltage is greater than predeterminated voltage VCC, the output end TZ1 of comparator U1 exports low level.
It needs, the voltage VCC of DC power supply can be determined according to the characteristic of battery pack 200, for example, VCC
The rated charging voltage that can be slightly less than battery pack 200, is possible to meeting over-voltage charging if charging voltage is greater than VCC, and over-voltage is filled
Capacitor easily leads to the damage of battery pack 200, therefore when charging voltage is greater than predeterminated voltage, i.e. battery pack 200 is in over-voltage charging shape
It when state, needs to control charging circuit, battery pack 200 is prevented to be maintained at the state of over-voltage charging.
Fig. 1 and Fig. 3 is please referred to, the controller 130 is electrically connected with the output end of the comparison circuit 120, the control
Device 130 is also electrically connected with charging control circuit 140, and charging control circuit 140 includes charging circuit and discharge circuit, charge control
Circuit 140 is respectively by exporting discharge control signal to charging circuit output charging control signal (PWMA), to discharge circuit
(PWMB) charge and discharge are carried out to control battery pack 200.What controller 130 was used to be exported according to 120 output end of comparison circuit
Comparison result generates corresponding control signal, and the control signal of generation is sent charging control circuit 140.In the present embodiment
In, the control signal is pulse waveform signal (PWM), the ratio that the controller 130 is exported according to 120 output end of comparison circuit
Relatively result control pulse waveform signal duty ratio, so as to regulating cell group 200 charge time,
When the charging voltage of the sampling is greater than predeterminated voltage, the duty of low control signal (PWMA) drops in controller 130
Than making battery pack 200 stop charging and keeping preset duration (such as 5s), the control signal is to stop charging signals, works as institute
When stating the charging voltage of sampling less than predeterminated voltage, controller 130 improves the duty ratio of control signal, keeps battery pack 200
Charged state, the control signal are starting charging signals.
Controller 130 can be a kind of IC chip, the processing capacity with signal.Above-mentioned controller 130 can
To be general processor, including central processing unit (Central Processing Unit, CPU), network processing unit (Network
Processor, NP) etc.；It can also be digital signal processor (Digital Signal Processing, DSP), dedicated collection
At circuit (Application Specific Integrated Circuit, ASIC), field programmable gate array (Field
Programmable Gate Array, FPGA) either other programmable logic device, discrete gate or transistor logic,
Discrete hardware components.General processor can be microprocessor；The controller 130 is also possible to any conventional processor
Deng.In this present embodiment, it is preferable that the controller 130 can be the single-chip microcontroller of STM32 series, such as STM32F103C8T6,
The models such as STM32F103VET6.
In this present embodiment, referring to Fig. 3, charging control circuit 140 is electrically connected with controller 130 (passes through first switch
Pipe Q1 is electrically connected to receive charging control signal with controller 130, is electrically connected by second switch Q2 with controller 130 to connect
Folding and unfolding electric control signal), it is also electrically connected with battery pack 200, is believed for connecting charge power supply according to the control of the controller 130
It number charges to battery pack 200.Charging control circuit 140 includes first switch tube Q1, and first switch tube Q1 includes control terminal,
The control terminal is electrically connected with controller 130, and first switch tube Q1 adjusts charge control according to the control signal in controller 130
The on off operating mode of circuit 140 itself, with the charging time of regulating cell group 200.Such as the charging control circuit 140 includes becoming
Depressor T, the first switch tube Q1 further include first end and second end, primary side and institute of the charge power supply by the transformer T
State the first end electrical connection of first switch tube Q1, the second end of the first switch tube Q1 and ground connection, the first switch tube Q1
Control terminal be electrically connected with the controller 130, under the control signal of the controller 130 control first end and second
On or off is held, so that the starting of charging control circuit 140 charging or stopping charging.
It is to be appreciated that when the charging voltage of battery pack 200 is greater than preset value, i.e., when battery pack 200 is in over-voltage charging,
The duty ratio of the adjustment control signal of controller 130, or stop output pulse waveform, so that battery pack 200 is stopped charging or is stopped
Battery pack balancing prevents 200 over-voltage of battery pack to charge, and when the charging voltage of battery pack 200 is less than preset value, controller 130 is adjusted
The duty ratio of whole control signal, or restore output pulse waveform, so that battery pack 200 is continued equilibrium.
Second embodiment
The present embodiment provides a kind of charging unit, the charging unit includes the active equalization as provided by first embodiment
Charge protection device 100.
3rd embodiment
The present embodiment provides a kind of active equalization charge protection methods, referring to Fig. 4, Fig. 4 is present pre-ferred embodiments
A kind of active equalization charge protection method provided.It should be noted that active equalization charge protection provided by the present embodiment
The active equalization charge protection device 100 that the technical effect of method, basic principle and generation and above-mentioned first embodiment provide
Identical, to briefly describe, the present embodiment part does not refer to place, can refer to corresponding contents in the above embodiments.
The active equalization charge protection method is applied to active equalization charge protection device 100, and the active equalization fills
Electrical protective device 100 includes sample circuit 110, comparison circuit 120, controller 130 and charging control circuit 140, the side
Method includes: S10~S40.
S10: the sampling of sample circuit 110 obtains the charging voltage of battery pack 200, and the charging voltage that sampling is obtained is sent
To the comparison circuit 120.
In this present embodiment, the sample circuit 110 includes the 4th resistance R4 and the 5th resistance R5, the battery pack 200
Including output port, the output port of the battery pack 200 passes sequentially through the 4th resistance R4, the 5th resistance R5 and is then grounded
Forming circuit.The sample circuit 110 includes sampled point, and the sampled point is set to the 4th resistance R4 and the 5th electricity
It hinders between R5.It is to be appreciated that the voltage collected of sample circuit 110 is 200 electricity of charging voltage or battery pack of battery pack 200
The partial pressure being pressed on the 5th resistance R5.That is R5*Ucell/ (R4+R5), wherein Ucell is the charging voltage of battery pack 200.It adopts
The voltage signal that sampling obtains is transmitted to comparison circuit 120 by sample circuit 110.
S20: the charging voltage is compared generation comparison result with predeterminated voltage by comparison circuit 120, and will be described
Comparison result is sent to controller 130.
In this present embodiment, comparison circuit 120 are electrically connected with the sample circuit 110, are used for the sample circuit
The charging voltage of 110 samplings is compared generation comparison result with predeterminated voltage；The comparison circuit 120 includes comparator U1,
The non-inverting input terminal of the comparator U1 for introducing predeterminated voltage signal, the comparison circuit 120 further include first resistor R1,
The DC power supply of second resistance R2 and predeterminated voltage, it is right that the DC power supply passes sequentially through first resistor R1, second resistance R2
Be formed into a loop with being followed by, the non-inverting input terminal of the comparator U1 be connected to the first resistor R1 and the second resistance R2 it
Between, the reverse input end of the comparator U1 is connect with the sample circuit 110, for accessing the charging electricity of the sampling
Pressure.
In this present embodiment, the reverse input end of comparator U1 is electrically connected with the sampled point of sample circuit 110, that is to say
Say, the connection of the non-inverting input terminal of the U-=R5*Ucell/ (R4+R5) of the reverse input end of comparator U1, the comparator U1 with
Between first resistor R1 and second resistance R2, it is possible to understand that ground, the voltage of the non-inverting input terminal of comparator U1 are U+=R2*Vcc/
(R1+R2), comparator U1 can obtain the charging electricity of battery pack 200 according to non-inverting input terminal compared with the voltage of reverse input end
The size relation of pressure and predeterminated voltage VCC.
The output end TZ1 of the comparator U1 is electrically connected with the controller 130, and the comparator U1 by described for adopting
The charging voltage of sample is compared generation comparison result with predeterminated voltage, and comparison result is sent to the controller 130, than
Relatively result includes: that the charging voltage of sampling is greater than the charging voltage of predeterminated voltage or sampling less than predeterminated voltage.
S30: the controller 130 according to the comparison result generate corresponding control signal and by the control signal extremely
The charging control circuit 140.
When the comparison result is that charging voltage is greater than predeterminated voltage, the control signal is to stop charging signals；When
The comparison result is when educating predeterminated voltage under charging voltage, and the control signal is starting charging signals.In the present embodiment
In, the control signal is pulse waveform signal, the comparison knot that the controller 130 is exported according to 120 output end of comparison circuit
Fruit controls the duty ratio of pulse waveform signal, so as to the time that regulating cell group 200 charges, when the charging electricity of the sampling
When pressure is greater than predeterminated voltage, the duty ratio of low control signal drops in controller 130, makes battery pack 200 stop charging and keeps default
Duration (such as 5s), the control signal are to stop charging signals, when the charging voltage of the sampling is less than predeterminated voltage, control
Device 130 processed improves the duty ratio of control signal, and battery pack 200 is made to keep charged state, and the control signal is starting charging letter
Number.
S40: the charging control circuit 140 charges to battery pack 200 according to the control signal.
Charging control circuit 140 is electrically connected with controller 130, is also electrically connected with battery pack 200, for connecting charge power supply
It is charged according to the control signal of the controller 130 to battery pack 200.Charging control circuit 140 includes first switch tube
Q1, first switch tube Q1 include control terminal, and the control terminal is electrically connected with controller 130, and first switch tube Q1 foundation is controlling
The on off operating mode of the control signal adjustment charging control circuit 140 itself of device 130, with the charging time of regulating cell group 200.Example
If the charging control circuit 140 includes transformer T, the first switch tube Q1 further includes first end and second end, charging electricity
Source is electrically connected by the primary side of the transformer T with the first end of the first switch tube Q1, and the of the first switch tube Q1
Two ends and ground connection, the control terminal of the first switch tube Q1 are electrically connected with the controller 130, in the controller 130
Control signal under control first end and second end on or off, so as to the starting of charging control circuit 140 charging or stop filling
Electricity.
In conclusion the present invention provides a kind of active equalization charge protection device, method and charging unit, the active
Equalizaing charge protective device includes: sample circuit, is electrically connected with battery pack, for sampling the charging voltage of the battery pack；Than
It compared with circuit, is electrically connected with the sample circuit, for comparing the charging voltage of the sampling circuit samples with predeterminated voltage
Compared with generation comparison result；Controller is electrically connected with the comparison circuit, the comparison result for being obtained according to the comparison circuit
The corresponding signal that controls of output is to charging control circuit, when the charging voltage of the sampling is greater than predeterminated voltage, the control
Signal is to stop charging signals, and when the charging voltage of the sampling is less than predeterminated voltage, the control signal is starting charging
Signal；Charging control circuit is electrically connected with the controller, and is also electrically connected with battery pack, for connecting charge power supply according to the control
The control signal of device processed charges to battery pack.By sampling charging voltage, by the charging voltage of sampling and predeterminated voltage into
Row compares, and when the charging voltage of sampling is greater than predeterminated voltage, stops battery pack balancing, prevents over-voltage to charge, when filling for sampling
When piezoelectric voltage is less than predeterminated voltage, holding charges to battery pack, through the invention can be with the mistake of effective solution battery pack
Pressure charging problems guarantee the equalizaing charge safety of battery pack to ensure that charging voltage is no more than setting value.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of active equalization charge protection device, which is characterized in that the active equalization charge protection device is for preventing electricity
Pond group over-voltage charging, the active equalization charge protection device include:
Sample circuit is electrically connected with battery pack, for sampling the charging voltage of the battery pack；
Comparison circuit is electrically connected with the sample circuit, for by the charging voltage and predeterminated voltage of the sampling circuit samples
It is compared generation comparison result；
Controller is electrically connected with the comparison circuit, and the comparison result output for being obtained according to the comparison circuit is corresponding
Signal is controlled to charging control circuit, when the charging voltage of the sampling is greater than predeterminated voltage, the control signal is to stop
Charging signals, when the charging voltage of the sampling is less than predeterminated voltage, the control signal is starting charging signals；
Charging control circuit is electrically connected with the controller, and is also electrically connected with battery pack, for connecting charge power supply according to the control
The control signal of device charges to battery pack.
2. active equalization charge protection device as described in claim 1, which is characterized in that the comparison circuit includes comparing
Device, the non-inverting input terminal of the comparator for introducing predeterminated voltage signal, the reverse input end of the comparator with it is described
Sample circuit connection, for accessing the charging voltage of the sampling, the output end of the comparator is electrically connected with the controller,
The comparator is used to the charging voltage of the sampling being compared generation comparison result with predeterminated voltage, and by comparison result
It is sent to the controller.
3. active equalization charge protection device as claimed in claim 2, which is characterized in that the comparison circuit includes the first electricity
Resistance, second resistance and DC power supply, the DC power supply passes sequentially through first resistor, second resistance, and then ground connection is formed back
Road, the non-inverting input terminal of the comparator are connected between the first resistor and the second resistance.
4. active equalization charge protection device as described in claim 1, which is characterized in that the sample circuit includes the 4th electricity
Resistance and the 5th resistance, the battery pack include output port, the output port of the battery pack pass sequentially through the 4th resistance,
Then 5th resistance is grounded forming circuit, the sample circuit includes sampled point, and the sampled point is set to the 4th resistance
Between the 5th resistance.
5. active equalization charge protection device as described in claim 1, which is characterized in that the charging control circuit includes the
One switching tube and transformer, the first switch tube include control terminal, first end and second end, and charge power supply passes through the transformation
The primary side of device is electrically connected with the first end of the first switch tube, the second end of the first switch tube and ground connection, and described first
The control terminal of switching tube is electrically connected with the controller, for controlling first end and second under the control signal of the controller
On or off is held, so that charging control circuit starting charging or stopping charging.
6. active equalization charge protection device as described in claim 1, which is characterized in that described to stop continuing for charging signals
Shi Changwei 5s.
7. active equalization charge protection device as described in claim 1, which is characterized in that the controller is single-chip microcontroller.
8. a kind of active equalization charge protection method, which is characterized in that the active equalization charge protection method is applied to actively
Equalizaing charge protective device, the active equalization charge protection device include sample circuit, comparison circuit, controller and charging
Control circuit, which comprises
Sampling circuit samples obtain the charging voltage of battery pack, and to be sent to the comparison electric for the charging voltage that sampling is obtained
Road；
The charging voltage is compared generation comparison result with predeterminated voltage by the comparison circuit, and by the comparison result
It is sent to controller；
The controller generates corresponding control signal according to the comparison result and controls the control signal to the charging
Circuit processed；
The charging control circuit charges to battery pack according to the control signal.
9. active equalization charge protection method according to claim 8, which is characterized in that when the comparison result is charging
When voltage is greater than predeterminated voltage, the control signal is to stop charging signals；When the comparison result is to educate under charging voltage
When predeterminated voltage, the control signal is starting charging signals.
10. a kind of charging unit, which is characterized in that the charging unit includes the master as described in claim 1~7 any one
Dynamic equalizaing charge protective device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811550229.7A CN109347183A (en) | 2018-12-18 | 2018-12-18 | A kind of active equalization charge protection device, method and charging unit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811550229.7A CN109347183A (en) | 2018-12-18 | 2018-12-18 | A kind of active equalization charge protection device, method and charging unit |
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| CN109347183A true CN109347183A (en) | 2019-02-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113746456A (en) * | 2020-12-09 | 2021-12-03 | 南开大学深圳研究院 | Reconfigurable composite waveform generating circuit |
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2018
- 2018-12-18 CN CN201811550229.7A patent/CN109347183A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113746456A (en) * | 2020-12-09 | 2021-12-03 | 南开大学深圳研究院 | Reconfigurable composite waveform generating circuit |
| CN113746456B (en) * | 2020-12-09 | 2023-10-24 | 南开大学深圳研究院 | Reconfigurable composite waveform generation circuit |
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