CN110071557A - A kind of battery charging rack structure - Google Patents
A kind of battery charging rack structure Download PDFInfo
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- CN110071557A CN110071557A CN201910507834.4A CN201910507834A CN110071557A CN 110071557 A CN110071557 A CN 110071557A CN 201910507834 A CN201910507834 A CN 201910507834A CN 110071557 A CN110071557 A CN 110071557A
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- 230000006698 induction Effects 0.000 claims abstract description 8
- 230000001939 inductive effect Effects 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 18
- 230000005611 electricity Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 7
- 230000008901 benefit Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000012544 monitoring process Methods 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/02—Conversion of DC power input into DC power output without intermediate conversion into AC
- H02M3/04—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
- H02M3/10—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1582—Buck-boost converters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
This application discloses a kind of battery charging rack structures, it include: charger, inductance, first switch unit, second switch unit and controller, charger, wherein the anode of charger is connect with the first end of inductance, and the second end of inductance is connect with the first end of the first end of first switch unit and second switch unit respectively, and the second end of second switch unit and the anode of battery pack connect, the second end of first switch unit and the cathode of charger are grounded, and the cathode of battery pack and the anode of charger connect；It is induction charging for being connected when first switch unit；Inductance, for being connected when second switch unit, to battery power discharge；Controller, for controlling first switch unit and the conducting of second switch units alternately by sending target pwm pulse.The application only needs two switch units, can be realized regardless of charger output voltage be higher or lower than battery pack voltage, all can be battery pack charging, compared to the prior art, the cost of the application is low.
Description
Technical field
This application involves battery charging fields, more particularly to a kind of battery charging rack structure.
Background technique
Buck framework is currently mostly used greatly to a section or multisection lithium battery charging.The advantage of this kind of framework be it is high-efficient,
Loop is accordingly fast.Buck framework requires the output voltage of power supply to have to be larger than the voltage of battery pack, asks to solve this
Topic usually uses four pipe buck frameworks, as shown in Figure 1, the framework is made of 4 MOSFET, when the output electricity of adapter
When pressure is higher than the voltage of battery pack, controller often closes Q4, normally opened Q3, and Q1, Q2, L1 composition is allowed to be depressured framework；When input voltage is low
When Cell1~Celln voltage, the normally opened Q1 of controller, Chang Guan Q2 allow Q3, Q4, L1 to form boosting framework, no doubt can do so
Solve the problems, such as that the output voltage of adapter is higher or lower than cell voltage, but it is with high costs.
Therefore, how to provide a kind of scheme of solution above-mentioned technical problem is that those skilled in the art need to solve at present
Problem.
Summary of the invention
The purpose of the application is to provide a kind of battery charging rack structure, it is only necessary to which two switch units fill no matter can be realized
The output voltage of electric appliance be higher or lower than battery pack voltage, all can be battery pack charging, it is at low cost.
In order to solve the above technical problems, this application provides a kind of battery charging rack structures, comprising: charger, inductance, first
Switch unit, second switch unit and controller, in which:
The anode of the charger is connect with the first end of the inductance, and the second end of the inductance is respectively with described first
The first end of switch unit and the first end of the second switch unit connection, the second end of the second switch unit with it is described
The anode connection of battery pack, the second end of the first switch unit are grounded with the cathode of the charger, the battery pack
The anode of cathode and the charger connect；
The charger is the induction charging for being connected when the first switch unit；
The inductance, for being connected when the second switch unit, to the battery power discharge；
The controller, for controlling the first switch unit and the second switch by sending target pwm pulse
Units alternately conducting, wherein the duty ratio of the target pwm pulse meetsWherein, VBATFor the battery
The voltage at group both ends, VinFor the output voltage of the charger, D is the duty ratio.
Preferably, the first switch unit includes the first NMOS tube, and the drain electrode of first NMOS tube is as described the
The first end of one switch unit, second end of the source electrode of first NMOS tube as the first switch unit.
Preferably, the second switch unit includes PMOS tube and first diode, the drain electrode of the PMOS tube with it is described
The anode of first diode is connected to the first end of the second switch unit, the source electrode of the PMOS tube and the described 1st
The cathode of pole pipe is connected to the second end of the second switch unit.
Preferably, the second switch unit includes the second NMOS tube and the second diode, the source of second NMOS tube
The anode of pole and second diode is connected to the first end of the second switch unit, the drain electrode of second NMOS tube
The second end of the second switch unit is connected to the cathode of second diode.
Preferably, the second switch unit includes Schottky diode, and the anode of the Schottky diode is as institute
State the first end of second switch unit, second end of the cathode of the Schottky diode as the second switch unit.
Preferably, the battery charging rack structure further include:
First resistor on inductive discharge circuit；
The controller is also used to obtain the electric current for flowing through the first resistor, to monitor the charging electricity of the battery pack
Stream.
Preferably, battery charging rack structure further include: first end connect with the first resistor, second end and system power supply
The third switch unit of cathode connection；
The controller is also used to when the supply voltage and/or supply current of the battery pack be more than corresponding pre-
If when value, controlling the third switch unit and disconnecting.
Preferably, the third switch unit includes third NMOS tube, the 4th NMOS tube, third diode, the four or two pole
Pipe, in which:
The anode of the source electrode of the third NMOS tube and the third diode is connected to the third switch unit
First end, the third NMOS tube drain electrode respectively with the cathode of the third diode, the cathode of the 4th diode, institute
The drain electrode connection of the 4th NMOS tube is stated, the source electrode of the 4th NMOS tube and the anode of the 4th diode are connected to described
The second end of third switch unit.
Preferably, the battery charging rack structure further include:
The second resistance in parallel with the charger.
This application provides a kind of battery charging rack structures, comprising: charger, inductance, first switch unit, second switch list
Member and controller, in which: charger anode connect with the first end of inductance, the second end of inductance respectively with first switch unit
First end and second switch unit first end connection, the anode of the second end of second switch unit and battery pack connects, the
The second end of one switch unit and the cathode of charger are grounded, and the cathode of battery pack and the anode of charger connect；Charger,
It is induction charging for being connected when first switch unit；Inductance, for being connected when second switch unit, to battery power discharge；Control
Device processed, for controlling first switch unit and the conducting of second switch units alternately by sending target pwm pulse, wherein target
The duty ratio of pwm pulse meetsWherein, VBATFor the voltage at battery pack both ends, VinFor the output electricity of charger
Pressure, D is duty ratio.
In practical applications, using the scheme of the application, the cathode of battery pack is connected to the anode of charger, controller
The duty ratio of pwm pulse is set according to the voltage of battery pack, then sends pwm pulse and is opened with controlling first switch unit and second
Units alternately conducting is closed, when the conducting of first switch unit, charger is induction charging, when the conducting of second switch unit, electricity
To battery power discharge, the application only needs two switch units for sense, can be realized the output voltage regardless of charger be higher than or
Lower than the voltage of battery pack, all can be battery pack charging, it is at low cost.
Detailed description of the invention
It in order to more clearly explain the technical solutions in the embodiments of the present application, below will be to institute in the prior art and embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the application
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of structural schematic diagram of battery charging rack structure provided by the prior art；
Fig. 2 is the structural schematic diagram of another battery charging rack structure provided herein；
Fig. 3 is the structural schematic diagram of another battery charging rack structure provided herein；
Fig. 4 is the structural schematic diagram of another battery charging rack structure provided herein；
Fig. 5 is the structural schematic diagram of another battery charging rack structure provided herein；
Fig. 6 is the structural schematic diagram of another battery charging rack structure provided herein；
Fig. 7 a is the structural schematic diagram of another battery charging rack structure provided herein；
Fig. 7 b is the structural schematic diagram of another battery charging rack structure provided herein；
Fig. 8 is the structural schematic diagram of another battery charging rack structure provided herein；
Fig. 9 is the structural schematic diagram of another battery charging rack structure provided herein；
Figure 10 is the structural schematic diagram of another battery charging rack structure provided herein.
Specific embodiment
The core of the application is to provide a kind of battery charging rack structure, it is only necessary to which two switch units fill no matter can be realized
The output voltage of electric appliance be higher or lower than battery pack voltage, all can be battery pack charging, it is at low cost.
To keep the purposes, technical schemes and advantages of the embodiment of the present application clearer, below in conjunction with the embodiment of the present application
In attached drawing, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described embodiment is
Some embodiments of the present application, instead of all the embodiments.Based on the embodiment in the application, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall in the protection scope of this application.
Referring to figure 2., Fig. 2 is a kind of structural schematic diagram of battery charging rack structure provided herein, including charger
V1, inductance L, first switch unit 1, second switch unit 2 and controller 3, in which:
Charger V1 anode connect with the first end of inductance L, the second end of inductance L respectively with first switch unit 1
First end and the connection of the first end of second switch unit 2, the second end of second switch unit 2 and the anode of battery pack connect, the
The second end of one switch unit 1 is grounded with the cathode of charger V1, and the cathode of battery pack is connect with the anode of charger V1；
Charger V1 charges for being connected when first switch unit 1 for inductance L；
Inductance L, for being connected when second switch unit 2, to battery power discharge；
Controller 3, for target pwm pulse to control first switch unit 1 and the alternating of second switch unit 2 is led by sending
It is logical, wherein the duty ratio of target pwm pulse meetsWherein, VBATFor the voltage at battery pack both ends, VinTo fill
The output voltage of electric appliance V1, D are duty ratio.
Specifically, controller 3 controls first switch unit 1 by sending target pwm pulse and second switch unit 2 is handed over
For conducting, goal pwm pulse refers specifically to the pwm pulse of control 1 on or off of first switch unit, correspondingly, control
Device 3 processed control second switch unit 2 while controlling first switch unit 1 and being connected turns off, and closes in control first switch unit 1
Control second switch unit 2 is connected while disconnected.Referring to battery charging rack structure as shown in Figure 1, by battery pack (Cell1~
Celln cathode) is connect with the anode of charger V1, and the output voltage of charger V1 is equivalent to the virtual earth of battery pack at this time.When
When the conducting of first switch unit 1, second switch unit 2 turn off, charger V1 and inductance L constitute induction charging circuit, by charging
Device V1 is inductance L charging, at this point, inductance L storage energy, electric current carrying pathway is anode → inductance L → the first of charger V1
The cathode of 1 → charger of switch unit V1；When the shutdown of first switch unit 1, second switch unit 2 are connected, inductance L, battery
Group constitutes inductive discharge circuit, because the electric current of inductance L cannot be mutated, the transmission path of electric current is inductance L → battery pack
→ inductance L, so inductance L can charge for battery pack.
Specifically, setting the current voltage of battery pack as Va, the charging voltage of battery anode should be Vb, work as Vb> VaWhen,
It can charge for battery pack, referring to battery charging rack structure as shown in Figure 1, as the output voltage V of charger V1inLess than battery pack
Current voltage VaWhen, it needs to be made up of boosting framework Q3, Q4, L1, Q3 and Q4 alternate conduction is availableWherein, D4It is controller 3 to the duty ratio of the Q4 pwm pulse sent, by adjusting the duty ratio, so that it may
Make VBAT is increased to the voltage V for meeting the battery pack charging requirementb, as the output voltage V of charger V1inGreater than the electricity of battery pack
When pressure, need to be made up of decompression framework, Q1, Q2 alternate conduction, available V Q1, Q2, L1BAT=D1Vin, D1For controller 3
The duty ratio of the pwm pulse sent to Q1 can make V by adjusting the duty ratioBATBe reduced to meet the battery pack charging want
The voltage V askedb, in order to realize no matter the voltage of charger V1 can be battery pack charging below or above the voltage of battery pack,
Battery charging rack structure in the prior art includes at least four switching tube, higher cost.
Electric current in battery charging rack structure provided herein, when charger V1 is that inductance L charges, in inductance L
Incrementss Δ i+MeetElectric current reduction amount Δ i when inductance L is to battery power discharge, in inductance L_MeetIt is understood that the duty ratio D of the target pwm pulse of control 1 on or off of first switch unit is
The turn-on time t of first switch unit 1onWith the ratio of duty cycle T, duty cycle T is the turn-on time t of switch unitonWith
Turn-off time toffSum, make electric current incrementss Δ i+With electric current reduction amount Δ i-It is equal, available control first switch unit 1
The duty ratio D of the target pwm pulse of conducting meetsIt may further obtainIt is not difficult to find out that
As D=1/2, VBAT=Vin, when the output voltage of charger V1 is less than the voltage of battery pack, need the electricity to charger V1
Press VinIt boosts, it is available as D > 1/2 referring to above formula, V can be madeBAT> Vin, therefore, on the basis of D > 1/2,
Duty ratio D is adjusted, V can be madeBATBoost to the voltage V for meeting the battery pack charging requirementb, correspondingly, working as the defeated of charger V1
When voltage is greater than the voltage of battery pack out, the voltage V to charger V1 is neededinIt is depressured, it is available as D < referring to above formula
When 1/2, V can be madeBAT< Vin, therefore, on the basis of D < 1/2, duty ratio D is adjusted, V can be madeBATIt is depressured to and meets the electricity
The voltage V of pond group charging requirementb.To sum up, using battery charging rack structure provided herein, it is only necessary to it is single that two switches be arranged
Member, the size of the duty ratio by changing target pwm pulse, can be completed the buck of the output voltage to charger V1, real
Showed i.e. realize regardless of charger output voltage be higher or lower than battery pack voltage, all can be battery pack charging, at
This is low.
Specifically, the battery pack in the application is specifically as follows lithium battery group.
This application provides a kind of battery charging rack structures, comprising: charger, inductance, first switch unit, second switch list
Member and controller, in which: charger anode connect with the first end of inductance, the second end of inductance respectively with first switch unit
First end and second switch unit first end connection, the anode of the second end of second switch unit and battery pack connects, the
The second end of one switch unit and the cathode of charger are grounded, and the cathode of battery pack and the anode of charger connect；Charger,
It is induction charging for being connected when first switch unit；Inductance, for being connected when second switch unit, to battery power discharge；Control
Device processed, for controlling first switch unit and the conducting of second switch units alternately by sending target pwm pulse, wherein target
The duty ratio of pwm pulse meetsWherein, VBATFor the voltage at battery pack both ends, VinFor the output electricity of charger
Pressure, D is duty ratio.
In practical applications, using the scheme of the application, the cathode of battery pack is connected to the anode of charger, controller
The duty ratio of pwm pulse is set according to the voltage of battery pack, then sends pwm pulse and is opened with controlling first switch unit and second
Units alternately conducting is closed, when the conducting of first switch unit, charger is induction charging, when the conducting of second switch unit, electricity
To battery power discharge, the application only needs two switch units for sense, can be realized the output voltage regardless of charger be higher than or
Lower than the voltage of battery pack, all can be battery pack charging, it is at low cost.
On the basis of the above embodiments:
Referring to figure 3., Fig. 3 is the structural schematic diagram of another battery charging rack structure provided herein, which fills
Electric framework is on the basis of the above embodiments:
Embodiment as one preferred, first switch unit 1 include the first NMOS tube QN1, the first NMOS tube QN1Leakage
First end of the pole as first switch unit 1, the first NMOS tube QN1Second end of the source electrode as first switch unit 1.
Referring to figure 4., Fig. 4 is the structural schematic diagram of another battery charging rack structure provided herein, which fills
Electric framework is on the basis of the above embodiments:
Embodiment as one preferred, second switch unit 2 include PMOS tube QP1With first diode D1, PMOS tube QP1
Drain electrode and first diode D1Anode be connected to the first end of second switch unit 2, PMOS tube QP1Source electrode and first
Diode D1Cathode be connected to the second end of second switch unit 2.
Specifically, being filled in order to avoid the voltage of battery pack when charger V1 removal is inverse, second switch provided herein
It further include the first diode D of the anode connection of cathode and battery pack, anode and inductance L connection in unit 21, pass through the one or two
Pole pipe D1One-way conduction characteristic block the voltage of battery pack, improve the safety of the application.
Referring to figure 5., Fig. 5 is the structural schematic diagram of another battery charging rack structure provided herein, which fills
Electric framework is on the basis of the above embodiments:
Embodiment as one preferred, second switch unit 2 include the second NMOS tube QN2With the second diode D2, second
NMOS tube QN2Source electrode and the second diode D2Anode be connected to the first end of second switch unit 2, the second NMOS tube QN2
Drain electrode and the second diode D2Cathode be connected to the second end of second switch unit 2.
Fig. 6 is please referred to, Fig. 6 is the structural schematic diagram of another battery charging rack structure provided herein, which fills
Electric framework is on the basis of the above embodiments:
Embodiment as one preferred, second switch unit 2 include Schottky diode D0, Schottky diode D0's
First end of the anode as second switch unit 2, Schottky diode D0Second end of the cathode as second switch unit 2.
Specifically, second switch unit 2 can also be selected high with switching frequency, positive in order to further reduce the cost
The Schottky diode D for the advantages such as pressure drop is low0, it is to be understood that as the first NMOS tube QN1When conducting, drain terminal is low electricity
It is flat, make Schottky diode D0In off state.
Embodiment as one preferred, the battery charging rack structure further include:
First resistor R on inductive discharge circuit1；
Controller 3 is also used to acquisition and flows through first resistor R1Electric current, to monitor the charging current of battery pack.
Specifically, inductive discharge circuit, that is, conducting of second switch unit 2, first switch unit 1 be when turning off, by inductance L and
The circuit that battery pack is constituted, by first resistor R1It is arranged in inductive discharge circuit, the acquisition of controller 3 flows through first resistor R1's
The monitoring to the charging current of battery pack can be realized in electric current, it is to be understood that in setting first resistor R1The voltage at both ends
When, the charging current to charge to battery pack, first resistor R can be set1Setting position be referred to shown in Fig. 7 a,
It is referred to shown in Fig. 7 b, certainly, as long as being arranged in inductive discharge circuit, the application does not do specific restriction herein.
Fig. 8 is please referred to, Fig. 8 is the structural schematic diagram of another battery charging rack structure provided herein, which fills
Electric framework is on the basis of the above embodiments:
Embodiment as one preferred, the battery charging rack structure further include: first end connect with first resistor R1, second
Hold the third switch unit 4 connecting with system power supply cathode；
Controller 3 is also used to when the supply voltage of battery pack and/or supply current are more than corresponding preset value,
Third switch unit 4 is controlled to disconnect.
Specifically, when battery pack is system power supply, if controller 3 detects supply voltage and/or the power supply of battery pack
When electric current is more than corresponding preset value, control third switch unit 4 is disconnected, to disconnect the power supply of battery pack, realize over-voltage/
Overcurrent protection further increases the reliability and safety of the application.
Specifically, current direction when considering the current direction and battery power discharge when charging to battery pack is opposite
, in order to guarantee to battery pack carry out over-voltage, overcurrent protection it is comprehensive, may include the 3rd NMOS in third switch unit 4
Pipe QN3, the 4th NMOS tube QN4, third diode D3, the 4th diode D4, in which: third NMOS tube QN3, the 4th NMOS tube QN4,
Third diode D3, the 4th diode D4It is referred to Fig. 9 connection, i.e. third NMOS tube QN3Source electrode and third diode D3's
Anode is connected to the first end of third switch unit 4, third NMOS tube QN3Drain electrode respectively with third diode D3Cathode,
4th diode D4Cathode, the 4th NMOS tube QN4Drain electrode connection, the 4th NMOS tube QN4Source electrode and the 4th diode D4's
Anode is connected to the second end of third switch unit 4.When charging to battery pack, over-voltage, over-current phenomenon avoidance if it exists controls third
NMOS tube QN3With the 4th NMOS tube QN4Shutdown, passes through the 4th diode D4Charging current is blocked, when battery power discharge, if it exists
Over-voltage and over-current phenomenon controls third NMOS tube QN3With the 4th NMOS tube QN4Shutdown, passes through third diode D3Discharge current is blocked,
Further increase the safety and reliability of the application.
Figure 10 is please referred to, Figure 10 is the structural schematic diagram of another battery charging rack structure provided herein, the battery
Charge construction is on the basis of the above embodiments:
Embodiment as one preferred, the battery charging rack structure further include:
The second resistance R in parallel with charger V12。
Specifically, can also have voltage at Vin after being removed in view of charger V1, pass through second resistance R2Consume this
Voltage further ensures the safety of the application.
It should also be noted that, in the present specification, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes that
A little 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, the element limited by sentence "including a ...", is not arranged
Except there is also other identical elements in the process, method, article or apparatus that includes the element.
The foregoing description of the disclosed embodiments makes professional and technical personnel in the field can be realized or use the application.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the application.Therefore, the application
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (9)
1. a kind of battery charging rack structure characterized by comprising charger, inductance, first switch unit, second switch unit
And controller, in which:
The charger anode connect with the first end of the inductance, the second end of the inductance respectively with the first switch
The first end of unit and the connection of the first end of the second switch unit, the second end of the second switch unit and the battery
The anode connection of group, the second end of the first switch unit are grounded with the cathode of the charger, and the battery pack is born
Pole is connect with the anode of the charger；
The charger is the induction charging for being connected when the first switch unit；
The inductance, for being connected when the second switch unit, to the battery power discharge；
The controller, for controlling the first switch unit and the second switch unit by sending target pwm pulse
Alternate conduction, wherein the duty ratio of the target pwm pulse meetsWherein, VBATFor the battery pack two
The voltage at end, VinFor the output voltage of the charger, D is the duty ratio.
2. battery charging rack structure according to claim 1, which is characterized in that the first switch unit includes the first NMOS
Pipe, first end of the drain electrode of first NMOS tube as the first switch unit, the source electrode conduct of first NMOS tube
The second end of the first switch unit.
3. battery charging rack structure according to claim 2, which is characterized in that the second switch unit include PMOS tube and
First diode, drain electrode and the anode of the first diode of the PMOS tube are connected to the of the second switch unit
The cathode of one end, the source electrode of the PMOS tube and the first diode is connected to the second end of the second switch unit.
4. battery charging rack structure according to claim 2, which is characterized in that the second switch unit includes the 2nd NMOS
The anode of pipe and the second diode, the source electrode of second NMOS tube and second diode is connected to the second switch
The first end of unit, the drain electrode of second NMOS tube and the cathode of second diode are connected to the second switch list
The second end of member.
5. battery charging rack structure according to claim 2, which is characterized in that the second switch unit includes Schottky two
Pole pipe, first end of the anode of the Schottky diode as the second switch unit, the yin of the Schottky diode
Second end of the pole as the second switch unit.
6. battery charging rack structure according to claim 1, which is characterized in that the battery charging rack structure further include:
First resistor on inductive discharge circuit；
The controller is also used to obtain the electric current for flowing through the first resistor, to monitor the charging current of the battery pack.
7. battery charging rack structure according to claim 6, which is characterized in that the battery charging rack structure further include: first end
It is connect with the first resistor, the third switch unit of second end and system power supply cathode connection；
The controller is also used to when the supply voltage and/or supply current of the battery pack be more than corresponding preset value
When, it controls the third switch unit and disconnects.
8. electric battery electrifier structure according to claim 7, which is characterized in that the third switch unit includes the 3rd NMOS
Pipe, the 4th NMOS tube, third diode, the 4th diode, in which:
The anode of the source electrode of the third NMOS tube and the third diode is connected to the first of the third switch unit
End, the drain electrode of the third NMOS tube respectively with the cathode of the third diode, the cathode of the 4th diode, described the
The drain electrode of four NMOS tubes connects, and the source electrode of the 4th NMOS tube and the anode of the 4th diode are connected to the third
The second end of switch unit.
9. battery charging rack structure according to any one of claims 1 to 8, which is characterized in that the battery charging rack structure also wraps
It includes:
The second resistance in parallel with the charger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910507834.4A CN110071557A (en) | 2019-06-12 | 2019-06-12 | A kind of battery charging rack structure |
Applications Claiming Priority (1)
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023246861A1 (en) * | 2022-06-23 | 2023-12-28 | 圣邦微电子(苏州)有限责任公司 | Dc-dc converter |
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