CN207559607U - A kind of battery pack balancing charging circuit and its control structure - Google Patents
A kind of battery pack balancing charging circuit and its control structure Download PDFInfo
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Abstract
The utility model is related to technical field of electric power more particularly to a kind of battery pack balancing charging circuit and its control structures.Based on above-mentioned equalizing structure, when individual monomers cell voltage is too low constantly, inverter module is enabled to charging to low-voltage battery unit, then copped wave module is reused to charge to whole, complete balanced key task, when individual cells overtension, start makes the electricity of high-voltage battery unit be transferred to other low-voltage battery units with copped wave module, it reuses inverter module and carries out charge and discharge realization equalizaing charge to whole, pass through the equalizing structure of this programme, it is that two kinds of modules be combined with each other synergistic effect, reduce time for balance, also ensure the accuracy of equalization simultaneously, avoid single equilibrium module that from can not adapting to a variety of unbalanced situations, the unfavorable situation attended to one thing and lose sight of another, realize the promotion of equalization function and effect.
Description
Technical field
The utility model is related to technical field of electric power more particularly to a kind of battery pack balancing charging circuit and its control knots
Structure.
Background technology
In electric system normal operation, inevitably encounter power supply and go offline, the emergency situations such as voltage instability
And result in the need for cutting off the power to ensure equipment safety, to avoid power equipment operation exception caused by cutting off the power, often need
It to use to various types of battery energy storage systems, battery energy storage system is electric power as stand-by power supply and energy reserves device
One in industry important by part, and with the promotion of battery variety and performance, the monomer capacity and electricity of battery are continuous
It is promoted, but at this stage, the capacity of single battery and the still insufficient electricity with meeting most of equipment of ability for storing electricity
Electrical demand is pressed, needs to obtain required voltage and capacity using multiple battery series-parallel connections are formed battery pack in most cases
Grade, in the ideal case, it is intended that multiple batteries in battery pack can keep identical charging/discharging voltage and charging speed
Rate to realize the synchronization of battery pack, simplifies charge and discharge process and improves efficiency, but due to manufacturing process, battery material, inside and outside
The reasons such as portion's environment lead to occur unbalanced phenomena between internal battery pack single battery in charge and discharge process, this unevenness
Weighing apparatus phenomenon can cause the single battery of internal battery pack to generate overcharge and overdischarge phenomenon, which can be with filling
The increase of discharge time and aggravate, as a result, the service life of the single battery in battery pack is made to decline rapidly, battery pack is whole
Efficiency for charge-discharge and capacity are even unable to reach set design requirement much smaller than theoretical value.Therefore in most of battery packs
It also needs to that corresponding balanced management structure is configured in application system, with various balanced management strategies with each list in balancing battery group
The charge and discharge process of body battery is consistent it (including charge/discharge electricity amount, voltage class, size of current etc.).Particularly nearly ten
In the past few years, it is continuously emerged based on the balance policy of various types circuit and electronic device, but receives circuit structure and electronics
There are various deficiencies for the limitation of component：Such as using the LC oscillating circuits balance policy that electric energy transfer is principle due to switch number
Mesh is more, therefore control circuit is complicated, loss is larger；Although based on the balance policy of chopper circuit in the less battery of single battery
There is higher transfer efficiency, but generally speaking in group, balanced electric energy transfer efficiency is still relatively low, is not suitable for large-scale electricity
Pond group.
Utility model content
The purpose that the utility model is created is, provides a kind of battery pack balancing charging circuit and its control structure, energy
Time for balance consumption is reduced during battery set charge/discharge, improves the accuracy of equalization, to improve efficiency for charge-discharge, expands battery pack
Application range.
To achieve the above object, the utility model creation adopts the following technical scheme that.
A kind of battery pack balancing charging circuit, including both of which weighing apparatus module, i.e. inverter module and copped wave module, each electricity
Pool unit corresponds to an inverter module, and the adjacent battery unit of each two corresponds to a copped wave module, in the inverter module
Including a half-bridge inversion circuit, half-bridge inversion circuit prime is equipped with AC/DC power supplys to provide DC voltage, and passes through LC successively
The circuits such as filter circuit, high frequency transforming circuit and secondary rectifying and wave-filtering are equalized voltage/current.
The half-bridge inversion circuit includes the MOSFET pipes of two series connection, and reverse parallel connection has two poles respectively on MOSFET pipes
Pipe；It is also parallel with Absorption Capacitance respectively on MOSFET pipes；The MOSFET of series connection manages in parallel with a capacitance group again, the capacitance group
Including two sufficiently large and equal capacitances of capacitance, the MOSFET of series connection and the both ends of capacitance group are connected to both ends of power, and two
A capacitance intermediate point is connect with the intermediate point of two MOSFET pipes, and LC filter circuits, the LC are equipped between two intermediate points
Filter circuit includes resonant capacitance and resonance electric pole；LC filter circuits are connected by a high frequency transformer and respective battery group
It connects, the high frequency transformer front end is connected to LC filter circuits, and rear end after secondary current rectifying and wave filtering circuit by being connected to battery
Group, the secondary current rectifying and wave filtering circuit include resonant capacitance, resonant inductance and the rectification two for being connected to high frequency transformer rear end
Pole pipe.
The chopper circuit utilize battery pack power itself, to realize the equilibrium of transfer mode, each two battery pack it
Between be corresponding with single copped wave circuit, the list copped wave circuit includes MOSFET and manages, and diode is parallel on MOSFET pipes, and MOSFET is managed
Battery both ends are connected to after the energy storage inductor of electric energy is connected with for storing, by coupling electricity between adjacent two single chopper circuits
Appearance is connected, and the tie point at coupled capacitor both ends is located in two single chopper circuits among open the light pass and energy storage inductor.
Based on above-mentioned equalizing structure, when individual monomers cell voltage is too low constantly, enabling inverter module is to low-voltage electricity
Pool unit charges, and then reuses copped wave module and charges to whole, balanced key task is completed, when Individual cells list
During first overtension, start makes the electricity of high-voltage battery unit be transferred to other low-voltage battery units with copped wave module, then
Charge and discharge realization equalizaing charge is carried out to whole using inverter module, is that two kinds of modules are mutual by the equalizing structure of this programme
With reference to synergistic effect, that is, reduce time for balance, while also ensure the accuracy of equalization, avoid single equilibrium module that from can not adapting to more
The unbalanced situation of kind, the unfavorable situation attended to one thing and lose sight of another are realized and are maximized favourable factors and minimized unfavourable ones, while above two module is organically combined, letter
Change the structure of equalizing circuit and the quantity of component, no-voltage/electric current beginning is realized in module, effectively reduces the energy of circuit
The problems such as measuring consumption, and solving associated inner heat realizes the promotion of equalization function and effect.
A kind of battery charging and discharging control structure, including above-mentioned equalization charging circuit, in front of the equalization charging circuit successively
Equipped with microcontroller, D/A module, PWM generation chips and driving circuit, the microcontroller PWM is generated by D/A module chip into
Row control is to generate pulsed drive waveform, and the PWM waveform of generation is after overdrive circuit is modulated in aforementioned equalization charging circuit
The drive control of MOSFET pipes is provided with sensor in battery unit, and the current and voltage signals of battery unit are fed back to list
In piece machine, closed-loop control system is formed.Microcontroller controls, letter mainly as the control mechanism of equalization charging circuit including gating
The control of number conversion and processing, the transmission of equilibrium operation algorithm and inside and outside data；Existing PWM chip is preferentially used with letter
Change design process, since the PWM waveform driving force directly obtained is weaker, MOSFET in aforementioned equalization charging circuit can not be met
Needed for pipe driving, driving circuit is needed to carry out modulated drive signal in this system, provide the transient current needed for MOSFET pipes, simultaneously
PWM wave is isolated, prevents circuit from leading directly to.The driving circuit includes driving chip, and driving chip is powerful enough for providing
Transient state starting current, front stage circuit is respectively provided in driving chip front and back end, and the impulse wave of PWM chip generation inputs respectively
The HIN pins of the prime of driving chip and LIN pins, front stage circuit correspond, and HIN pins correspond to H0, the output in H0
Signal is for driving the upper bridge arm MOSFET in half-bridge inversion circuit to manage, and similarly LIN pins correspond to L0, for driving lower bridge arm
MOSFET is managed；The VS pins of driving chip are connected with the connecting pin of MOSFET pipes above and below half-bridge inversion circuit simultaneously, upper bridge arm
The S poles of MOSFET pipes are extremely connected with the D of lower bridge arm MOSFET pipes, while are lifted using fast recovery diode and an electrolytic capacitor
The voltage at high driving chip late-class circuit VB ends makes VB virtual voltages be higher than the neutral voltage of half-bridge inversion circuit, voltage amplitude
It is worth the pressure drop subtracted for VCC on diode.
Particularly, the PWM chip refers to SG3525 chips, the CT pins of the SG3525 chips and DISC pins
Discharge resistance R is equipped between (discharge pin)DR can be passed throughDResistance value sets the discharge current value of CT, RT pins with
And CT pins connect concussion resistance and concussion capacitance respectively；VDD pins are connected with low dc voltage (such as voltage input end
+15V)。
Using above-mentioned equalization charging circuit combination control structure, it can realize and various types of battery pack is filled
Electric discharge realizes the equilibrium treatment of actively and passively formula according to the various unbalanced phenomenas of battery pack, passes through external chip and driving
Circuit improves the portfolio effect of equalizing circuit, reduces the electric energy energy consumption of total circuit and component, extends monocell
The quantity and combination of single battery in group, so the characteristics of giving full play to combined type equalizing circuit have entire control structure
Standby low power consumption high efficiency, and being capable of the good needs for adapting to equilibrium treatment not of the same race.
Description of the drawings
Fig. 1 is the functional block diagram of battery pack balancing charging circuit in embodiment；
Fig. 2 is the structure chart of battery pack balancing charging circuit in embodiment；
Fig. 3 is the structure principle chart of half-bridge inversion circuit in embodiment；
Fig. 4 is four output characteristics figures positioned at the transformer of pole after inverter circuit；
Fig. 5 is the structural scheme of mechanism of chopper circuit；
Fig. 6 is the frame diagram of battery charging and discharging control structure in embodiment；
Fig. 7 is the corresponding peripheral circuit of PWM chip in embodiment；
Fig. 8 is the circuit structure diagram of driving circuit in embodiment.
Specific embodiment
It elaborates below in conjunction with specific embodiment to the utility model creation.
Due to the difference between single battery, internal battery pack battery can cause builtin voltage poor in charge and discharge process again
Different, this species diversity can be sharply increased with the increase for using access times, destroy the validity of battery pack, and lead to economy and skill
Loss in terms of art, this phenomenon are referred to as unbalanced phenomena, including one or more monomer battery voltage it is excessively high (relative to
The types such as most single batteries in battery pack, similarly hereinafter), too low and height mixing, for above-mentioned unbalanced phenomena, Wo Menyao
Using required Balance route strategy, no matter which kind of circuit structure or which kind of electronic component are technically used, in principle
We can classify common balance control method, wherein most importantly comparison method and averaging method.
Comparison method is to measure layer voltage each in battery pack successively and be compared and sort, and is obtained according to each layer measurement
Ceiling voltageAnd minimum voltageAccording to measured value and need to set corresponding static or dynamic equalizing voltageAnd by comparingAndBetween size or relationship, specify a Balance route formula, according to equilibrium control
The output result of standard starts or closes balanced device (combination for referring to the circuit and electronic device that are used to implement Balance route)
It discharges successively the highest battery of each layer voltage value or battery strings, until the voltage of all single batteries or battery strings is expired
Sufficient demand, this kind of balance policy include the mistake that multiple (directly proportional to each layer battery pack balancing number) electric energy is dissipated in a manner of thermal energy
Journey, therefore its time for balance is longer, while the problems such as cause waste of energy and fever, advantage be control structure and circuit compared with
Simply, it is easy to accomplish；Averaging method also needs to measureAnd the voltage value V of each layeri, and calculate average electricity
PressureWherein(wherein n is the number of plies of battery pack, if individual layer battery pack then refers to the sum of single battery), meter
After calculating above-mentioned data, when detectingAndWhen to the battery unit of ceiling voltage
It discharges, untilWhen stop；When detectingAndWhen, then it is right
The battery unit of minimum voltage charges, untilThis kind of balance policy equalization efficiency is higher, but still
There are problems that waste of energy.
Based on above-mentioned balance policy, we have proposed a kind of battery pack balancing charging circuit, the equalization charging circuit principles
As shown in Figure 1, including both of which weighing apparatus module, i.e., inverter module and copped wave module, corresponding one of each battery unit are inverse
Become module, the adjacent battery unit of each two corresponds to a copped wave module, and the corresponding main circuits of Fig. 1 are (to simplify circuit, in figure only
Illustrate two-way equalizing circuit) as shown in Figure 2.The DC power supply that DC circuit exports is converted into frequency for realization and voltage can
The AC power of control includes an inverter circuit in inverter module, to simplify circuit structure, is made using half-bridge inversion circuit
For basic topological structure, in half-bridge inversion circuit prime using AC/DC power source supplies DC pressures, and filtered successively by LC
The circuits such as circuit, high frequency transforming circuit and secondary rectifying and wave-filtering are equalized voltage/current.
Wherein half-bridge inversion circuit is as shown in figure 3, include the MOSFET pipes T of two series connection1、T2, on MOSFET pipes respectively
Reverse parallel connection has diode D1、D2, the effect of the diode of reverse parallel connection is can when the voltage and current of inductive load is reversed
It is fed back to DC side, while makes load current continuous；To eliminate the consumption of MOSFET pipes, realize zero voltage turn-off, managed in MOSFET
On be also parallel with Absorption Capacitance C respectively3And C4, when MOSFET pipes turn off, electric current is transferred on corresponding Absorption Capacitance, electricity
Hold the climbing for limiting MOSFET pipe both end voltages, it is made slowly to increase, and then realize zero voltage turn-off, while Absorption Capacitance
Also achieve anti-parallel diodes D1、D2No-voltage it is open-minded, further reduce circuit loss.
The MOSFET pipes of series connection are in parallel with a capacitance group again, and capacitance group includes two sufficiently large and equal electricity of capacitance
Hold C1、C2, the MOSFET of series connection and the both ends of capacitance group are connected to both ends of power, and two capacitances in capacitance group divide power supply one
It is two, two capacitance intermediate points are connect with the intermediate point of two MOSFET pipes, and LC filter circuits are equipped between two intermediate points,
Including resonant capacitance CaAnd resonance electric pole La.Particularly, cause to lead directly to up and down to prevent two MOSFET pipes from simultaneously turning on, it should
When the on off state to half-bridge inverter is defined.Pass through one by the electric current of half-bridge inversion circuit and LC filter circuits
High frequency transformer is connect with respective battery group, and high frequency transformer front end is connected to LC filter circuits, and high frequency transformer simultaneously can
Its transformation and buffer action, end rear end after secondary current rectifying and wave filtering circuit by being connected to battery pack, the secondary rectification
Filter circuit includes resonant capacitance C0, resonant inductance L0And it is connected to the rectifying tube D of high frequency transformer rear end3、D4；Resonance electricity
Hold CbOutput capacitance as transformer simultaneously, passes through larger CbSmoother DC voltage U can be exported0, from the figure 3, it may be seen that
When resonant inductance electric current is timing, transformer secondary output exports just lower negative, Half bridge rectifier pipe D3It is connected as battery powered, works as resonance
When inductive current is negative, under being born in transformer secondary output output just, D4Conducting, resonant inductance electric current are battery powered, therefore the change
The output of depressor secondary is U for an amplitude0, 180 ° of wide square-wave voltages, operating mode includes four types, as shown in figure 4,
With reference to equivalent source voltage UEResonance electricity under different working modes can be derived with the relationship of conduction device and resonant inductance-table 1-
Inducing current iLWith resonant capacitor voltage UCWith equivalent source voltage UERelational expression.
1 equivalent source voltage U of tableEWith conduction device and the relation table of resonant inductance
Chopper circuit utilizes battery pack power itself, to realize the equilibrium of transfer mode.It is corresponding between each two battery pack
Single copped wave circuit basic structure as shown in figure 5, including MOSFET pipes T21、T22, diode D is parallel on MOSFET pipes21、
D22, MOSFET is managed and the energy storage inductor L for storing electric energy21、L22) battery both ends are connected to after series connection, adjacent two are singly cut
Pass through coupled capacitor C between wave circuit21It is connected, coupled capacitor C21The tie point at both ends, which is located in two single chopper circuits, to open the light
Among pass and energy storage inductor；In Figure 5, L21、C21、T21、D21The single copped wave circuit of composition one, L22、C22、T22、D22Composition one
Single copped wave circuit；Based on above-mentioned copped wave circuit, when drive pulse signal is positive voltage, T21Conducting, L21Carry out energy storage, C21To
L22, battery energy storage；When drive pulse signal is negative voltage, T21Shutdown, L21Induced electromotive force make T21It is led from smaller saturation
Lead to pressure drop rise to higher level, diode D21Positively biased is connected, L21To C21Charging, while L22To battery discharge；So when single
Body electricity B1The voltage in pond is higher than B2, T is connected21It can make B1Electricity is transferred to B2, it is on the contrary then make B2Electricity is transferred to B1。
Based on above-mentioned equalizaing charge structure, the utility model proposes a kind of battery charging and discharging control structure, schematic diagrams
As shown in fig. 6, including above-mentioned equalization charging circuit, microcontroller, D/A module, PWM are equipped in front of the equalization charging circuit successively
Chip and driving circuit are generated, the microcontroller generates chip to PWM by D/A module and controlled to generate pulsed drive
Waveform, the PWM waveform of generation after overdrive circuit is modulated to the drive control of MOSFET pipes in aforementioned equalization charging circuit, together
When to improve portfolio effect, realize that equalizaing charge electric power makes full use of, battery unit (being equivalent to load end) be provided with biography
Sensor feeds back to the current and voltage signals of battery unit in microcontroller, ultimately forms a closed-loop control system.
Microcontroller controls, the control of signal conversion and processing mainly as the control mechanism of equalization charging circuit including gating
Transmission of system, equilibrium operation algorithm and inside and outside data etc., the operation principle and its peripheral circuit of microcontroller, D/A module circuit
Relative maturity in the prior art, it will not be described here.
As needed we it is preferential use be existing PWM chip with design processes simplified, such as usable SG3525PWM
Chip, the PWM chip based on different type or structure need corresponding peripheral circuit to realize basic function, while reduce dry
It disturbs, improves chip efficiency, the corresponding peripheral circuit of SG3525 chips is as shown in fig. 7, special, in CT pins and DISC pins
Discharge resistance R is equipped between (discharge pin)DR can be passed throughDResistance value sets the discharge current value of CT, RT pins with
And CT pins connect concussion resistance and concussion capacitance respectively；VDD pins are connected with low dc voltage (such as voltage input end
+15V)。
Since the PWM waveform driving force directly obtained is weaker, MOSFET in aforementioned equalization charging circuit can not be met and managed
Needed for driving, therefore driving circuit is needed to carry out modulated drive signal in this system, provide the transient current needed for MOSFET pipes, together
When PWM wave is isolated, prevent circuit from leading directly to.The structural principle of driving circuit is as shown in figure 8, the driving circuit includes driving core
Piece (such as IR2110 driving chips), driving chip is for providing transient state starting current powerful enough, in driving chip front and back end
Front stage circuit is respectively provided with, the impulse wave of PWM chip generation inputs the HIN pins and LIN of the prime of driving chip respectively
Pin, front stage circuit correspond, and HIN pins correspond to H0, and the output signal in H0 is for driving in half-bridge inversion circuit
Upper bridge arm MOSFET pipes, similarly LIN pins correspond to L0, for lower bridge arm MOSFET to be driven to manage；The VS pins of driving chip simultaneously
It is connected with the connecting pin of MOSFET pipes above and below half-bridge inversion circuit, the S poles of upper bridge arm MOSFET pipes and the D of lower bridge arm MOSFET pipes
Extremely it is connected, while the voltage at driving chip late-class circuit VB ends is raised using fast recovery diode and an electrolytic capacitor, makes
VB virtual voltages are higher than the neutral voltage of half-bridge inversion circuit, and voltage magnitude subtracts the pressure drop on diode, the voltage for VCC
The actual drive signal voltage of upper bridge arm power switch, above-mentioned driving circuit can utilize a core as in half-bridge inversion circuit
Piece directly provides required current and voltage signals for the two-way MOSFET pipes in subsequent conditioning circuit, reduces electronic component, simplifies circuit.
Finally it should be noted that above example is only to illustrate the technical solution rather than right of the utility model creation
The utility model creates the limitation of protection domain, although having made in detail to the utility model creation with reference to preferred embodiment
It is bright, it will be understood by those of ordinary skill in the art that, the technical solution that can be created to the utility model is modified or is waited
With replacing, the spirit and scope of technical solution is created without departing from the utility model.
Claims (3)
1. a kind of battery pack balancing charging circuit, including the battery unit to be charged being serially connected in battery pack and battery pack,
It is characterized in that, the charging circuit includes inverter module and copped wave module, each battery unit is in parallel, and there are one inversions
Module, in parallel there are one copped wave module between the adjacent battery unit of each two, the inverter module includes at least a half-bridge
Inverter circuit, half-bridge inversion circuit prime are equipped with AC/DC power supplys to provide DC voltage, and successively by LC filter circuits, height
The circuits such as frequency transforming circuit and secondary rectifying and wave-filtering are equalized voltage/current and charge for battery unit；The copped wave module
Including at least a single chopper circuit；
The half-bridge inversion circuit includes two and is cascaded and is managed by the MOSFET of power supply peace driving；On each MOSFET pipes
Reverse parallel connection has diode and Absorption Capacitance respectively；The half-bridge inversion circuit further includes capacitance group, the MOSFET pipes of series connection
In parallel with capacitance group, the capacitance group includes two sufficiently large and equal capacitances of capacitance, the MOSFET and capacitance group of series connection
Both ends be connected to both ends of power, two capacitance intermediate points are connect with the intermediate point of two MOSFET pipes, two intermediate points it
Between be equipped with LC filter circuits, the LC filter circuits include resonant capacitance and resonance electric pole；LC filter circuits pass through a height
Frequency power transformer is connect with respective battery group, and the high frequency transformer front end is connected to LC filter circuits, and rear end passes through secondary rectification
Battery pack is connected to after filter circuit, the secondary current rectifying and wave filtering circuit includes resonant capacitance, resonant inductance and is connected to
The rectifier diode of high frequency transformer rear end；
The chopper circuit utilizes battery pack power itself, right between each two battery pack to realize the equilibrium of transfer mode
There should be single copped wave circuit, the list copped wave circuit includes managing with a MOSFET, and diode, MOSFET are parallel on MOSFET pipes
It manages and battery both ends is connected to after the energy storage inductor of electric energy is connected with for storing, pass through coupling between adjacent two single chopper circuits
Capacitance is connected, and the tie point at coupled capacitor both ends, which is located in two single chopper circuits, to be opened among MOSFET and energy storage inductor；Two
A adjacent single chopper circuit and two stacks of cells are into double loop to charge for battery unit.
2. a kind of battery pack balancing charging circuit control structure, including equalization charging circuit, which is characterized in that further include set on equal
Microcontroller, D/A module, PWM generation chips and driving circuit, the microcontroller in front of weighing apparatus charging circuit pass through D/A module pair
PWM generation chips are controlled to generate pulsed drive waveform, the PWM waveform of generation after overdrive circuit is modulated to it is aforementioned
The drive control of MOSFET pipes, is provided with sensor, by the Current Voltage of battery unit in battery unit in weighing apparatus charging circuit
Signal is fed back in microcontroller, forms closed-loop control system；Microcontroller mainly as equalization charging circuit control mechanism, including
Gating control, signal conversion and the transmission of control, equilibrium operation algorithm and inside and outside data handled；Preferentially using existing
PWM chip, since the PWM waveform driving force directly obtained is weaker, can not meet aforementioned equalizaing charge with design processes simplified
In circuit needed for the driving of MOSFET pipes, driving circuit is needed to carry out modulated drive signal in this system, provided needed for MOSFET pipes
Transient current, while PWM wave is isolated, prevent circuit from leading directly to；The driving circuit includes driving chip, and driving chip is used to carry
For transient state starting current powerful enough, front stage circuit, the arteries and veins of PWM chip generation are respectively provided in driving chip front and back end
Rush that wave inputs the HIN pins of prime of driving chip respectively and LIN pins, front stage circuit correspond, HIN pins correspond to
Output signal in H0, H0 is for driving the upper bridge arm MOSFET in half-bridge inversion circuit to manage, and similarly LIN pins correspond to L0, uses
In driving lower bridge arm MOSFET pipes；The connecting pin phase of the VS pins of driving chip and MOSFET pipes above and below half-bridge inversion circuit simultaneously
Even, the S poles of upper bridge arm MOSFET pipes are extremely connected with the D of lower bridge arm MOSFET pipes, while utilize fast recovery diode and one
Electrolytic capacitor raises the voltage at driving chip late-class circuit VB ends, makes VB virtual voltages higher than the center line electricity of half-bridge inversion circuit
Pressure, voltage magnitude subtract the pressure drop on diode for VCC.
A kind of 3. battery pack balancing charging circuit control structure according to claim 2, which is characterized in that the PWM chip
For SG3525 chips, discharge resistance R is equipped between the CT pins of the SG3525 chips and DISC pinsDR can be passed throughDElectricity
Resistance value sets the discharge current value of CT, and RT pins and CT pins connect concussion resistance and concussion capacitance respectively；VDD draws
Foot is connected with low dc voltage as voltage input end.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107658948A (en) * | 2017-11-10 | 2018-02-02 | 国网江苏省电力公司泰州供电公司 | A kind of battery pack balancing charging circuit and its control structure |
| CN109962660A (en) * | 2019-03-28 | 2019-07-02 | 清华大学 | Driving circuit, drive system of electric automobile and driving method |
| CN110133516A (en) * | 2019-02-27 | 2019-08-16 | 延边中谷领创电力科技有限公司 | Battery charging and discharging device |
| US11552482B2 (en) | 2019-11-15 | 2023-01-10 | Ford Global Technologies, Llc | Hybrid cell balancing for high voltage battery packs |
-
2017
- 2017-11-10 CN CN201721492800.5U patent/CN207559607U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107658948A (en) * | 2017-11-10 | 2018-02-02 | 国网江苏省电力公司泰州供电公司 | A kind of battery pack balancing charging circuit and its control structure |
| CN110133516A (en) * | 2019-02-27 | 2019-08-16 | 延边中谷领创电力科技有限公司 | Battery charging and discharging device |
| CN109962660A (en) * | 2019-03-28 | 2019-07-02 | 清华大学 | Driving circuit, drive system of electric automobile and driving method |
| CN109962660B (en) * | 2019-03-28 | 2024-01-23 | 清华大学 | Driving circuit, electric automobile driving system and driving method |
| US11552482B2 (en) | 2019-11-15 | 2023-01-10 | Ford Global Technologies, Llc | Hybrid cell balancing for high voltage battery packs |
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