CN206894304U - A kind of charging device - Google Patents
A kind of charging device Download PDFInfo
- Publication number
- CN206894304U CN206894304U CN201720828840.6U CN201720828840U CN206894304U CN 206894304 U CN206894304 U CN 206894304U CN 201720828840 U CN201720828840 U CN 201720828840U CN 206894304 U CN206894304 U CN 206894304U
- Authority
- CN
- China
- Prior art keywords
- pole
- resistance
- electric capacity
- npn triode
- battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The application provides a kind of charging device, including control unit, adjustment unit and charhing unit；Described control unit is connected to the adjustment unit and the charhing unit, and the adjustment unit is connected to the charhing unit；The charhing unit is used to charge for battery, and it includes being used for the circuit unit for detecting cell voltage, and for detecting the circuit unit of battery charge；The adjustment unit includes PMOS transistor；Described control unit adjusts the PWM duty cycle that PMOS transistor is driven in the adjustment unit, so as to adjust the charge mode of the charhing unit according to the cell voltage and battery charge detected.Charging device of the present utility model can be the battery charging of all kinds, specification, also ensure that battery can quickly and safely charge simultaneously, the phenomenon of the shorter battery life caused by error in charging mode can be reduced, and it is avoided that the accidents such as battery explosion occur, so as to save social resources, user is facilitated.
Description
Technical field
It the utility model is related to electronics field, and in particular to a kind of charging device.
Background technology
The battery charger of prior art is typically charged using conventional single constant voltage or constant current charge mode,
All there is the shortcomings that respective in the two, constant voltage charging can ensure that quickly charging is simultaneously in the case where battery electric quantity is relatively sufficient
Energy full charging pond, but charging is carried out when battery electric quantity is relatively low the excessive phenomenon of charging current occurs, it is this to exceed battery
The charging modes of rated current can substantially reduce the service life of battery, or even can cause the accidents such as battery explosion；Constant current fills
Electricity can ensure quick charge in most cases, but full and battery sky electricity feelings can not be filled completely to battery by existing
The problem of charging causes battery temperature too high under condition.
Utility model content
The application provides a kind of charging device, including control unit, adjustment unit and charhing unit；Described control unit connects
The adjustment unit and the charhing unit are connected to, the adjustment unit is connected to the charhing unit；The charhing unit is used
Being charged in for battery, it includes being used for the circuit unit for detecting cell voltage, and for detecting the circuit of battery charge
Unit；The adjustment unit includes PMOS transistor；Described control unit charges electric according to the cell voltage and battery detected
Stream, the PWM duty cycle that PMOS transistor is driven in the adjustment unit is adjusted, so as to adjust the charging mould of the charhing unit
Formula.
Charging device of the present utility model can be the battery charging of all kinds, specification, while also ensure battery energy
Quickly and safely charge, it is possible to reduce the phenomenon of shorter battery life caused by wrong way charges, avoid the things such as battery explosion
Therefore occur, so as to save social resources, facilitate user.
Brief description of the drawings
Fig. 1 is the charging device structural representation of embodiment one；
Fig. 2 is the charging device structural representation of embodiment one；
Fig. 3 is the lithium ion battery charge graph of embodiment one；
Fig. 4 is the charging device structural representation of embodiment two；
Fig. 5 is the charging device structural representation of embodiment three；
Fig. 6 is the charging device structural representation of example IV.
Embodiment
The utility model is described in further detail below by embodiment combination accompanying drawing.It is wherein different to implement
Similar component employs associated similar element numbers in mode.In the following embodiments, many detailed descriptions are
In order that obtaining the application can be better understood.However, those skilled in the art can be without lifting an eyebrow recognize, which part
Feature is dispensed in varied situations, or can be substituted by other elements, material, method.In some cases,
The related certain operations of the application are not shown in the description or description, and this is the core in order to avoid the application
Flooded by excessive description, and to those skilled in the art, be described in detail these associative operations be not it is necessary,
They can completely understand associative operation at the general technology knowledge of description and this area in specification.
In addition, feature described in this description, operation or feature can combine to form respectively in any suitable way
Kind embodiment.Meanwhile each step in method description or action can also can be aobvious and easy according to those skilled in the art institute
The mode carry out order exchange or adjustment seen.Therefore, the various orders in specification and drawings are intended merely to clearly describe a certain
Individual embodiment, necessary order is not meant to be, wherein some sequentially must comply with unless otherwise indicated.
It is herein part institute serialization number itself, such as " first ", " second " etc., is only used for distinguishing described object,
Without any order or art-recognized meanings.And " connection ", " connection " described in the application, unless otherwise instructed, include directly and
It is indirectly connected with (connection).
Embodiment one：
As shown in figure 1, the three stage charging system device of the present embodiment includes control unit 10, adjustment unit 20 and charhing unit
30.Control unit 10 is connected to adjustment unit 20 and charhing unit 30, and adjustment unit 20 is connected to charhing unit 30.Charhing unit
30 are used to charge for battery, and it includes being used for the circuit unit for detecting cell voltage, and for detecting battery charge
Circuit unit；Control unit 10 is adjusted and driven in adjustment unit 20 according to the cell voltage and battery charge detected
PWM (Pulse Width Modulation, pulse width modulation) dutycycle of PMOS transistor, so as to adjust adjustment unit 20
Amplitude of Hypotensive realize the control to charging current and charging voltage, so as to adjust the charge mode of charhing unit 30, thus
Form complete close loop negative feedback.
Specifically, can be by external electrical by this adjustment unit 20 as shown in Fig. 2 adjustment unit 20 uses BUCK circuits
Source be depressured to it is more slightly higher than cell voltage so as to charge the battery, it include PMOS (P-Metal Oxide Semiconductor,
Pasitive channel Metal Oxide Semiconductor, P-type mos) transistor Q101, electricity
Hinder R103, NPN triode Q1 04, resistance R107, resistance R108, electric capacity C101, resistance R104, PMOS transistor Q102, NPN tri-
Pole pipe Q103, PNP triode Q105, NPN triode Q1 07, resistance R110, resistance R112, Schottky diode D101, inductance
L101, electric capacity C102.
PMOS transistor Q101 the first extremely externally connected power supply Vin of conducting；PMOS transistor Q101 the second conducting
Pole, resistance R103 the first pole, electric capacity C101 the first pole are connected to the second of PMOS transistor Q102 and turn on pole；Resistance R104
The first pole, the externally connected power supply Vin of the colelctor electrode of NPN triode Q1 03；PMOS transistor Q101 grid and resistance
R103 the second pole is connected to the colelctor electrode of NPN triode Q1 04；Resistance R107 the second pole and resistance R108 the first pole connect
It is connected to the base stage of NPN triode Q1 04；Resistance R108 the second pole and the grounded emitter of NPN triode Q1 04；Resistance R107
The first pole be connected to control unit；Electric capacity C101 the second pole ground connection；Resistance R104 the second pole, NPN triode Q1 03
Base stage, PNP triode Q105 base stage are connected to the colelctor electrode of NPN triode Q1 07；PMOS transistor Q102 grid connection
To the emitter stage of NPN triode Q1 03 and PNP triode Q105 emitter stage；PNP triode Q105 colelctor electrode, the poles of NPN tri-
Pipe Q107 emitter stage, resistance R112 the second pole ground connection；Resistance R110 the second pole and resistance R112 the first pole are connected to
The base stage of NPN triode Q1 07；Resistance R110 the first pole is connected to control unit；PMOS transistor Q102 the first conducting pole
Inductance L101 the first pole is connected to Schottky diode D101 the first pole；Inductance L101 the second pole and electric capacity C102's
First pole is connected to charhing unit；Schottky diode D101 the second pole and electric capacity C102 the second pole ground connection.Adjustment unit
In 20, PMOS transistor Q101, resistance R103, NPN triode Q1 04, resistance R107, resistance R108 form low-power consumption, prevent
The energy content of battery pours in down a chimney back external power source Vin circuit structure.In one embodiment, the PMOS transistor in adjustment unit 20
The structure that Q101, resistance R103, NPN triode Q1 04, resistance R107, resistance R108 are formed, can use a Schottky diode
To substitute.In addition, in certain embodiments, adjustment unit 20 can not also include the above-mentioned circuit structure for preventing from pouring in down a chimney (i.e.
Do not include PMOS transistor Q101, resistance R103, NPN triode Q1 04, resistance R107, resistance R108, while also do not include replacing
For the Schottky diode in property scheme), now electric capacity C101 the first pole and PMOS transistor Q102 the second conducting pole
It is connected directly to external power source Vin.
Charhing unit includes resistance R106, resistance R111, resistance R101, NMOS (N-Metal Oxide
Semiconductor, Negative channel Metal Oxide Semiconductor, N-type metal-oxide semiconductor (MOS))
Transistor Q106, resistance R114, resistance R109, resistance R105, resistance R113, resistance R102, electric capacity C103, electric capacity C104, its
In, the circuit unit for detecting cell voltage includes resistance R102, resistance R105 and electric capacity C103, for detecting battery charging
The circuit unit of electric current includes resistance R113 and electric capacity C104.
Resistance R106 the first pole, resistance R102 the first pole, resistance R101 the second pole are connected to adjustment unit, also use
In the positive pole for being connected to battery to be charged；Resistance R101 the first pole is connected to+5V operating voltages end；Resistance R102 the second pole
Resistance R105 the first pole and electric capacity C103 the first pole are connected to, is additionally coupled to control unit；Resistance R105 the second pole and
Electric capacity C103 the second pole ground connection；Resistance R106 the second pole and resistance R111 the first pole are connected to nmos pass transistor Q106's
Grid；Nmos pass transistor Q106 the first conducting pole and resistance R109 the first pole are used to be connected to GND to be charged；Electricity
R111 the second pole, nmos pass transistor Q106 the second conducting pole, resistance R109 the second pole, resistance R113 the first pole is hindered to connect
It is connected to resistance R114 the first pole；Resistance R114 the second pole ground connection；Resistance R113 the second pole and electric capacity C104 the first pole
It is connected to control unit；Electric capacity C104 the second pole ground connection.
Schottky diode D101 is used as fly-wheel diode, and opening for PMOS transistor Q101 is controlled by PWM
Open and turn off, when PMOS transistor Q101 is opened, external power source Vin is to inductance L101 energy storage and charges the battery simultaneously, when
When PMOS transistor Q101 is closed, the energy of inductance L101 storages passes through battery and Schottky diode D101, nmos pass transistor
Q106, resistance R109, resistance R114 continuously form loop to be charged to battery last.
Control unit 10 can use single-chip microcomputer by software preferably by single-chip microcomputer, technical staff come flexible configuration
Which I/O port.The PWM mouths of control unit 10 are connected to the poles of resistance R110 first of adjustment unit, and Vset mouths are connected to resistance R102
The second pole and resistance R105 the first pole, Iset mouths are connected to resistance R113 the second pole and electric capacity C104 the first pole.
PMOS transistor Q101 GATE ends are the I/O ports for being connected indirectly to single-chip microcomputer, and I/O port has the He of two states 1
0,1 is high level, and 0 is low level, and switching 1 and 0 is controlled by house software, and adjusts both time ratios, i.e.,
The change of control PWM duty cycle can be achieved
Following process can be divided into by carrying out charging using the charging device of the present embodiment, be discussed in detail below in conjunction with Fig. 3：
(1) trickle charge process：
When the cell voltage that the Vset mouths of control unit 10 receive detection is less than 3V, now battery electric quantity is close to 0, then
Control unit 10 enters trickle charge pattern, and now PMOS transistor Q102 PWM duty cycle progressively reduces, when charging device leads to
When crossing the Iset mouths of control unit 10 and receiving the charging current of detection and reach the pre-set current value of battery, such as 0.1C electric currents
(0.1C electric currents refer to be charged with 1/10th electric currents of battery total capacity, such as battery capacity is 1000mAH, 0.1C
As 100mA) when, control unit 10 controls PMOS transistor Q102 dutycycle no longer to reduce, and now electric current is stable default
Current value, such as 0.1C are charged, and are carried out battery activated by weak current and are ensured that battery will not overheat in charging process, directly
Enter constant current charging mode after reaching more than 3V to cell voltage.
(2) constant-current charge process：
When the Vset mouths of control unit 10 receive the cell voltage of detection higher than 3V and are less than 4.2V, control unit 10 is entered
Enter constant current charging mode, now PMOS transistor Q102 dutycycle step by step modulating decreases up to Iset mouths and detects that electric current reaches
After pre-set current value, such as 1C electric currents, control PMOS transistor Q102 stable duty ratio is got off, and now electric current is stable default
Current value, such as 1C are charged, and with the progress of charging, cell voltage is gradually increasing, control driving PMOS transistor Q102
Positive dutycycle be gradually reduced, when Iset mouths detect that charging current then reduces positive dutycycle less than preset value, to increase PMOS
It is transistor Q102 opening time, on the contrary then increase positive dutycycle so as to increase charging current, so as to reduce charging current, such as
This is constantly adjusted, you can is maintained constant charging current constant, is ensured that battery both reaches permission by stable constant current
Maximum charging current without departing from specification limit, realizes not only quick but also safe battery charging again.If now use constant voltage
Charging, then battery rated current will be exceeded, this charging modes more than battery rated current can substantially reduce making for battery
With the life-span, or even cause the accidents such as battery explosion.
(3) constant-voltage charge process：
After the cell voltage that the Vset mouths of control unit 10 receive detection reaches 4.2V, due to depositing for the internal resistance of cell
Now battery is not filled really full, and the real voltage of battery can be calculated by below equation：Vtrue=Vbat-Iset*Ro, its
Middle Vtrue is battery real voltage, and Vbat is battery detecting voltage, and Iset is battery charge, and Ro is the internal resistance of cell, is passed through
This formula is understood, when Iset is sufficiently small, can obtain Vtrue ≈ Vbat, it is full now to can consider that battery fills, therefore charging device is adopted
With constant voltage charging modes, demarcation charging voltage is 4.2V, and PMOS transistor is stepped up after cell voltage reaches 4.2V
Q102 positive dutycycles of PWM reduce charging current, while ensure that battery float voltage Vbat is stable in 4.2V, now charging electricity
Stream progressively reduces, until close to preset value, such as 0, now battery real voltage can reach 4.2V, and battery had both filled full, this mode
Both over-charging of battery will not be caused, will not also cause battery to fill insatiable hunger.If now using constant current charge, battery can not be given complete
Fill entirely full, it is also possible to cause battery temperature too high.
Embodiment two：
The three stage charging system device circuit structural representation of the present embodiment is illustrated in figure 4, it also includes control unit, adjusted
Save unit and charhing unit.
Wherein, adjustment unit include resistance R201, NPN triode Q201, PNP triode Q204, NPN triode Q202,
Resistance R203, resistance R205, PMOS transistor Q203, inductance L201, Schottky diode D201, electric capacity C201, electric capacity C202,
Resistance R204 and Schottky diode D202.
Electric capacity C201 the first pole, resistance R201 the first pole, NPN triode Q201 colelctor electrode and PMOS transistor
Q203 the second conducting extremely externally connected power supply Vin, resistance R201 the second pole be connected to NPN triode Q201 base stage,
PNP triode Q204 base stage and NPN triode Q202 colelctor electrode；PMOS transistor Q203 grid is connected to the poles of NPN tri-
Pipe Q201 emitter stage and PNP triode Q204 emitter stage, its first conducting pole are connected to inductance L201 the first pole and Xiao
Special based diode D201 the first pole；Electric capacity C201 the second pole ground connection, NPN triode Q202 base stage are connected to resistance R203
The second pole and resistance R205 the first pole；PNP triode Q204 colelctor electrode, NPN triode Q202 emitter stage and resistance
R205 the second pole ground connection；Resistance R203 the first pole is connected to the PWM1 mouths of control unit；Inductance L201 the second pole, electric capacity
C202 the first pole and resistance R204 the second pole are connected to Schottky diode D202 the second pole；Schottky diode D202
The first pole be connected to the poles of resistance R202 first of charhing unit；Resistance R204 the first pole is connected to+5V operating voltages end；Xiao
Special based diode D201 the second pole and electric capacity C202 the second pole ground connection.
Charhing unit includes resistance R202, resistance R209, resistance R208, electric capacity C203, nmos pass transistor Q205, resistance
R210, resistance R206, resistance R207, electric capacity C204.Wherein, for detect cell voltage circuit unit include resistance R208 and
Electric capacity C203, and the circuit unit for detecting battery charge include resistance R207 and electric capacity C204.
Resistance R202 the first pole and resistance R208 the first pole are connected to the Schottky diode D202 of adjustment unit
One pole, it is additionally operable to be connected to the positive pole of battery to be charged；Resistance R208 the second pole and electric capacity C203 the first pole are connected to control
The Vset mouths of unit processed；Electric capacity C203 the second pole ground connection；Resistance R202 the second pole and resistance R209 the first pole are connected to
Nmos pass transistor Q205 grid；Nmos pass transistor Q205 the first conducting pole is connected to resistance R210 the first pole, is additionally operable to
It is connected to the negative pole of battery to be charged；Resistance R209 the second pole, nmos pass transistor Q205 the second conducting pole, resistance R210
Second pole and resistance R207 the first pole are connected to resistance R206 the first pole；Resistance R206 the second pole ground connection；Resistance R207
The second pole and electric capacity C204 the first pole be connected to the Iset mouths of control unit；Electric capacity C204 the second pole ground connection.
Schottky diode D202 is to prevent such case, that is, when disconnecting external power source Vin, has battery to put charging into
Device, the energy of battery can pour in down a chimney go back to external power source Vin ends, may cause circuit abnormality or battery discharge.Resistance R204 is
For causing control unit to determine whether battery access circuit, a such as single battery is 0-4.2V, when no battery accesses, control
The voltage that the Vset mouths of unit detect is 5V, and when there is battery to put charging device into, voltage can be pulled down to cell voltage, this
When control unit be determined with battery access.Resistance R202, resistance R209, nmos pass transistor Q205 are the electricity connect for cell anti-reverse
Line structure.The effect that resistance R210 is is, when cut-in voltage of the cell voltage less than nmos pass transistor Q205 can not be opened
During nmos pass transistor Q205, as the bypass resistance to charge the battery.
The charging device charging principle of the present embodiment is as follows, and when there is battery to be put into charging device, control unit detects
When Vset mouths voltage drops to 4.2V or following by 5V, control unit exports PWM by PWM1 mouths, when PWM is high level,
NPN triode Q202, PNP triode Q204, PMOS transistor Q203 conductings, external power source Vin electric current is through PMOS transistor
Q203, inductance L201 energy storage, inductive current are gradually increasing, through Schottky diode D202, battery, nmos pass transistor Q205, electricity
Resistance R210, resistance R206 return to ground terminal；When PWM is low level, NPN triode Q202 cut-offs, NPN triode Q201 conductings,
PMOS transistor Q203 ends, inductance L201 inductive drop now for L-R+, the energy stored by inductance L201 is by Xiao Te
Based diode D202, battery, resistance R206, Schottky diode D201 form loop.The electric current for flowing through battery passes through formula I=
V/R206 can be calculated, and V is the voltage at Iset in figure, i.e. resistance R207 and the electricity of electric capacity C204 connections in formula
Pressure, wherein, when I is pre-set current value, when the current value I detected is less than normal, then control unit is by adjusting PWM's
Dutycycle increases；When the current value I detected is bigger than normal, then control unit is reduced by adjusting PWM dutycycle, by
This forms complete negative-feedback.So as to, it is this adjust in real time by way of, charging current can be kept constant.
Embodiment three：
As shown in figure 5, the charging device of the present embodiment uses circuit frame as shown in Figure 5, the difference with embodiment two
It is adjustment unit.
The adjustment unit 20 of the present embodiment includes electric capacity C201, PMOS transistor Q203, Schottky diode D201, inductance
L201, electric capacity C202, resistance R201, NPN triode Q202, PNP triode Q204, NPN triode Q201, resistance R205, electricity
Hinder R203, Schottky diode D201, NPN triode Q207, PNP triode Q208, nmos pass transistor Q206, NPN triode
Q209, resistance R211, resistance R212 and resistance R213.
Electric capacity C201 the first pole, resistance R201 the first pole, NPN triode Q201 colelctor electrode and PMOS transistor
Q203 the second extremely externally connected power supply Vin of conducting；Electric capacity C201 the second pole ground connection；Resistance R201 the second pole is connected to
The colelctor electrode of NPN triode Q201 base stage, PNP triode Q204 base stage and NPN triode Q202；PMOS transistor Q203
Grid be connected to NPN triode Q201 emitter stage and PNP triode Q204 emitter stage；NPN triode Q202 base stage
It is connected to resistance R203 the second pole and resistance R205 the first pole；PNP triode Q204 colelctor electrode, NPN triode Q202
Emitter stage and resistance R205 the second pole ground connection；Resistance R203 the first pole is connected to control unit；PMOS transistor Q203
The first conducting pole, nmos pass transistor Q206 the first conducting pole be connected to inductance L201 the first pole；NPN triode Q207's
Colelctor electrode, the first of resistance R211 the extremely externally connected power supply Vin；Inductance L201 the second pole, electric capacity C202 the first pole and
Resistance R204 the second pole is connected to Schottky diode D201 the second pole；Schottky diode D201 the first pole is connected to
Charhing unit；Resistance R204 the first pole is connected to+5V operating voltages end；Nmos pass transistor Q206 grid is connected to NPN tri-
Pole pipe Q207 emitter stage and PNP triode Q208 emitter stage；Resistance R211 the second pole, NPN triode Q207 base stage
NPN triode Q209 colelctor electrode is connected to PNP triode Q208 base stage；NPN triode Q209 base stage and resistance
R213 the first pole is connected to resistance R212 the first pole；Resistance R212 the second pole is connected to control unit；Nmos pass transistor
The second of Q206 turns on the second of pole, PNP triode Q208 colelctor electrode, NPN triode Q209 emitter stage and resistance R213
Pole is grounded.
Resistance R201, NPN triode Q201, PNP triode Q204, NPN triode Q202, resistance R203, resistance R205
The circuit structure of enhancing PMOS transistor Q203 driving force is formed, in one embodiment, when the power of regulation circuit output
When smaller, NPN triode Q201, PNP triode Q204 can be cancelled.When external power source Vin voltage is relatively low or monolithic generator terminal
When the resistance to pressure energy of mouth is born, PMOS transistor Q203 directly can also be driven by control unit.
Resistance R211, NPN triode Q207, PNP triode Q208, NPN triode Q209, resistance R212, resistance R213
Circuit structure act as enhancing driving nmos pass transistor Q206 driving force, when the power for adjusting circuit output is smaller,
NPN triode Q207, PNP triode Q208 can be cancelled.When external power source Vin voltage is relatively low or one-chip machine port it is pressure-resistant
When can bear, directly it can also be driven by control unit.By resistance R211, NPN triode Q207, PNP triode Q208, NPN
Triode Q209, resistance R212, resistance R213, the freewheeling circuit of nmos pass transistor Q206 compositions, if the output of adjustment unit
When power is smaller, Schottky diode, plus earth can also be directly changed to, negative pole connects PMOS transistor Q203 drain electrode.
The charhing unit of the present embodiment uses and the identical circuit structure of embodiment two, charging principle and embodiment 21
Cause, therefore repeat no more.
Example IV：
The charging device of the present embodiment uses circuit frame as shown in Figure 6, and the difference with embodiment two is to adjust list
Member.
The adjustment unit 20 of the present embodiment includes electric capacity C201, Schottky diode D201, resistance R201, PMOS transistor
Q201, NPN triode Q202, resistance R203, resistance R205, electric capacity C202 and resistance R204.
Electric capacity C201 the first pole and the second of Schottky diode D201 the extremely externally connected power supply Vin；Electric capacity C201
The second pole ground connection；Schottky diode D201 the first pole is connected to resistance R201 the first pole and PMOS transistor Q201
Second conducting pole；PMOS transistor Q201 first conducting pole be connected to resistance R204 the second pole and electric capacity C202 first
Pole；Resistance R204 the first pole is connected to+5V operating voltages end；Resistance R201 the second pole and PMOS transistor Q201 grid
It is connected to NPN triode Q202 colelctor electrode；NPN triode Q202 base stage is connected to resistance R203 the first pole and resistance
R205 the first pole；Resistance R203 the second pole is connected to control unit；NPN triode Q202 emitter stage, resistance R205
Second pole and electric capacity C202 the second pole ground connection.
Schottky diode D201 design is to prevent such case, that is, when disconnecting external power source Vin, has battery to put
Enter charging device, the energy of battery can pour in down a chimney go back to external power source Vin ends, after may causing circuit abnormality or battery discharge etc.
Fruit.Resistance R204 is designed for making control unit determine whether battery access circuit, for example, a single battery is 0-
4.2V, when no battery accesses, the voltage that the Vset mouths of control unit detect is 5V；When there is battery to put charging device into, electricity
Pressure can be pulled down to cell voltage, and at this moment control unit then judges there is battery access.
Resistance R208 and electric capacity C203 parts are the circuit structure for detecting cell voltage, resistance R207 and electric capacity C204
Part is the circuit structure for detecting charging current.Resistance R202, resistance R209, nmos pass transistor Q203 are prevented for battery
The circuit structure of reversal connection.Resistance R210 effect is, when cell voltage causes nmos pass transistor less than nmos pass transistor Q203
When Q203 cut-in voltage can not open nmos pass transistor Q203, resistance R210 can be as the bypass resistance of battery charging.
The charhing unit of the present embodiment uses and the identical circuit structure of embodiment two, charging principle and embodiment 21
Cause, therefore repeat no more.
Three stage charging system device of the present utility model can be the battery charging of all kinds, specification, such as lithium-ion electric
Pond, both realized the quick charge of battery, while ensured that battery can safely charge again, battery can both have been filled it is full, and not
Occur and overcharge so that charging rate maximizes, it is possible to reduce the phenomenon of shorter battery life, energy caused by wrong way charges
Enough avoid the accidents such as battery explosion from occurring, so as to save social resources, facilitate user.
Use above specific case is illustrated to the utility model, is only intended to help and is understood the utility model, and
Not limiting the utility model.For the utility model person of ordinary skill in the field, according to think of of the present utility model
Think, some simple deductions, deformation can also be made or replaced.
Claims (10)
- A kind of 1. charging device, it is characterised in thatIncluding control unit, adjustment unit and charhing unit；Described control unit is connected to the adjustment unit and the charhing unit, and it is single that the adjustment unit is connected to the charging Member；The charhing unit is used to charge for battery, and it includes being used for the circuit unit for detecting cell voltage, and for detecting The circuit unit of battery charge；The adjustment unit includes PMOS transistor；Described control unit adjusts in the adjustment unit according to the cell voltage and battery charge that detect and drives PMOS The PWM duty cycle of transistor, so as to adjust the charge mode of the charhing unit.
- 2. device as claimed in claim 1, it is characterised in thatThe adjustment unit includes electric capacity C101, resistance R104, PMOS transistor Q102, NPN triode Q1 03, PNP triode Q105, NPN triode Q1 07, resistance R110, resistance R112, Schottky diode D101, inductance L101, electric capacity C102；Electric capacity C101 the first pole and PMOS transistor Q102 the second extremely externally connected power supply of conducting；The first pole of the resistance R104, the externally connected power supply of the colelctor electrode of the NPN triode Q1 03；The second pole ground connection of the electric capacity C101；The second pole of the resistance R104, the base stage of the NPN triode Q1 03, the connection of the base stage of the PNP triode Q105 To the colelctor electrode of the NPN triode Q1 07；The grid of the PMOS transistor Q102 is connected to the emitter stage of the NPN triode Q1 03 and the PNP triode Q105 emitter stage；The colelctor electrode of the PNP triode Q105, the emitter stage of the NPN triode Q1 07, the second pole of the resistance R112 Ground connection；The second pole of the resistance R110 and the first pole of the resistance R112 are connected to the base stage of the NPN triode Q1 07；The first pole of the resistance R110 is connected to described control unit；First conducting pole of the PMOS transistor and the first pole of the Schottky diode D101 are connected to the inductance L101 the first pole；The second pole of the inductance L101 and the first pole of the electric capacity C102 are connected to the charhing unit；The Schottky two Pole pipe D101 the second pole and the second pole of electric capacity C102 ground connection.
- 3. device as claimed in claim 2, it is characterised in thatThe PWM mouths of described control unit are connected to the poles of resistance R110 first of the adjustment unit.
- 4. the device as described in claim any one of 1-3, it is characterised in thatThe charhing unit includes resistance R106, resistance R111, resistance R101, nmos pass transistor Q106, resistance R114, resistance R109, resistance R105, resistance R113, resistance R102, electric capacity C103, electric capacity C104；Wherein, for detecting the circuit of cell voltage Unit includes resistance R102, resistance R105 and electric capacity C103, and the circuit unit for detecting battery charge includes resistance R113 and electric capacity C104；Described in the first pole of the resistance R106, the first pole of the resistance R102, the second pole of the resistance R101 are connected to Adjustment unit, it is additionally operable to be connected to the positive pole of battery to be charged；The first pole of the resistance R101 is connected to operating voltage end；The second pole of the resistance R102 is connected to the first pole of the resistance R105 and the first pole of the electric capacity C103, also connects It is connected to described control unit；The second pole of the resistance R105 and the second pole of electric capacity C103 ground connection；The second pole of the resistance R106 and the first pole of the resistance R111 are connected to the grid of the nmos pass transistor Q106；The first conducting pole of the nmos pass transistor Q106 and the first pole of the resistance R109 are used to be connected to battery to be charged Negative pole；The second pole of the resistance R111, the nmos pass transistor Q106 second conducting pole, the resistance R109 the second pole, The first pole of the resistance R113 is connected to the first pole of the resistance R114；The second pole ground connection of the resistance R114；The second pole of the resistance R113 and the first pole of the electric capacity C104 are connected to described control unit；The second pole ground connection of the electric capacity C104.
- 5. device as claimed in claim 4, it is characterised in thatThe Vset mouths of described control unit are connected to the poles of resistance R102 second, the poles of resistance R105 first, electricity of the charhing unit Hold the poles of C103 first；The Iset mouths of described control unit are connected to the poles of resistance R113 second of the charhing unit, the poles of electric capacity C104 first.
- 6. device as claimed in claim 1, it is characterised in thatThe adjustment unit includes resistance R201, NPN triode Q201, PNP triode Q204, NPN triode Q202, resistance R203, resistance R205, PMOS transistor Q203, inductance L201, Schottky diode D201, electric capacity C201, electric capacity C202, resistance R204 and Schottky diode D202；The first pole of the electric capacity C201, the first pole of the resistance R201, the colelctor electrode of the NPN triode Q201 and described PMOS transistor Q203 the second extremely externally connected power supply of conducting；The second pole ground connection of the electric capacity C201；The second pole of the resistance R201 is connected to the base stage of the NPN triode Q201, the base stage of the PNP triode Q204 With the colelctor electrode of the NPN triode Q202；The grid of the PMOS transistor Q203 is connected to the emitter stage of the NPN triode Q201 and the PNP triode Q204 emitter stage, its first conducting pole be connected to the inductance L201 the first pole and the Schottky diode D201 the One pole；The base stage of the NPN triode Q202 is connected to the second pole of the resistance R203 and the first pole of the resistance R205；Second pole of the colelctor electrode of the PNP triode Q204, the emitter stage of the NPN triode Q202 and the resistance R205 Ground connection；The first pole of the resistance R203 is connected to described control unit；Second pole of the second pole of the inductance L201, the first pole of the electric capacity C202 and the resistance R204 is connected to described Schottky diode D202 the second pole；The first pole of the Schottky diode D202 is connected to the charhing unit；The first pole of the resistance R204 is connected to operating voltage end；The second pole of the Schottky diode D201 and the second pole of electric capacity C202 ground connection.
- 7. device as claimed in claim 1, it is characterised in thatThe adjustment unit includes resistance R201, NPN triode Q201, PNP triode Q204, NPN triode Q202, resistance R203, resistance R205, PMOS transistor Q203, inductance L201, electric capacity C201, electric capacity C202, resistance R204, Schottky diode D201, NPN triode Q207, PNP triode Q208, nmos pass transistor Q206, NPN triode Q209, resistance R211, resistance R212 and resistance R213；The first pole of the electric capacity C201, the first pole of the resistance R201, the colelctor electrode of the NPN triode Q201 and described PMOS transistor Q203 the second extremely externally connected power supply of conducting；The second pole ground connection of the electric capacity C201；The second pole of the resistance R201 is connected to the base stage of the NPN triode Q201, the base stage of the PNP triode Q204 With the colelctor electrode of the NPN triode Q202；The grid of the PMOS transistor Q203 is connected to the emitter stage of the NPN triode Q201 and the PNP triode Q204 emitter stage；The base stage of the NPN triode Q202 is connected to the second pole of the resistance R203 and the first pole of the resistance R205；Second pole of the colelctor electrode of the PNP triode Q204, the emitter stage of the NPN triode Q202 and the resistance R205 Ground connection；The first pole of the resistance R203 is connected to described control unit；The first conducting pole of the PMOS transistor Q203, the first conducting pole of the nmos pass transistor Q206 are connected to the electricity Feel L201 the first pole；The colelctor electrode of the NPN triode Q207, the first of the resistance R211 the extremely externally connected power supply；Second pole of the second pole of the inductance L201, the first pole of the electric capacity C202 and the resistance R204 is connected to described Schottky diode D201 the second pole；The first pole of the Schottky diode D201 is connected to the charhing unit；The first pole of the resistance R204 is connected to operating voltage end；The grid of the nmos pass transistor Q206 is connected to the emitter stage of the NPN triode Q207 and the PNP triode Q208 emitter stage；The second pole of the resistance R211, the base stage of the NPN triode Q207 connect with the base stage of the PNP triode Q208 To the colelctor electrode of the NPN triode Q209；The base stage of the NPN triode Q209 and the resistance R213 the first pole are connected to the first pole of the resistance R212；The second pole of the resistance R212 is connected to described control unit；The second conducting pole of the nmos pass transistor Q206, the colelctor electrode of the PNP triode Q208, the NPN triode Q209 emitter stage and the resistance R213 the second pole are grounded.
- 8. device as claimed in claim 1, it is characterised in thatThe adjustment unit includes electric capacity C201, Schottky diode D201, resistance R201, the pole of PMOS transistor Q201, NPN tri- Pipe Q202, resistance R203, resistance R205, electric capacity C202 and resistance R204；The first pole of the electric capacity C201 and the second extremely externally connected power supply of the Schottky diode D201；The second pole ground connection of the electric capacity C201；The first pole of the Schottky diode D201 is connected to the first pole of the resistance R201 and the PMOS transistor Q201 the second conducting pole；The first conducting pole of the PMOS transistor Q201 is connected to the second pole of the resistance R204, the of the electric capacity C202 One pole and charhing unit；The first pole of the resistance R204 is connected to operating voltage end；The second pole of the resistance R201 and the PMOS transistor Q201 grid are connected to the collection of the NPN triode Q202 Electrode；The base stage of the NPN triode Q202 is connected to the first pole of the resistance R203 and the first pole of the resistance R205；The second pole of the resistance R203 is connected to described control unit；Second pole of the emitter stage of the NPN triode Q202, the second pole of the resistance R205 and the electric capacity C202 connects Ground.
- 9. the device as described in claim any one of 6-8, it is characterised in thatThe charhing unit includes resistance R202, resistance R209, resistance R208, electric capacity C203, nmos pass transistor Q203, resistance R210, resistance R206, resistance R207, electric capacity C204；Wherein, for detect cell voltage circuit unit include resistance R208 and Electric capacity C203, and the circuit unit for detecting battery charge include resistance R207 and electric capacity C204；The first pole of the resistance R202 and the first pole of the resistance R208 are connected to the adjustment unit, are additionally operable to be connected to The positive pole of battery to be charged；The second pole of the resistance R208 and the first pole of the electric capacity C203 are connected to described control unit；The second pole ground connection of the electric capacity C203；The second pole of the resistance R202 is connected to the first pole of the resistance R209 and the grid of the nmos pass transistor Q203；The first conducting pole of the nmos pass transistor Q203 is connected to the first pole of the resistance R210, is additionally operable to be connected to and waits to fill The negative pole of battery；The second pole of the resistance R209, the second conducting pole, the second pole of the resistance R210 of the nmos pass transistor Q203 The first pole of the resistance R206 is connected to the first pole of the resistance R207；The second pole ground connection of the resistance R206；The second pole of the resistance R207 and the first pole of the electric capacity C204 are connected to described control unit；The second pole ground connection of the electric capacity C204.
- 10. device as claimed in claim 9, it is characterised in thatThe PWM1 mouths of described control unit are connected to the second pole of the resistance R203, and its Vset mouth is connected to the resistance R208 The second pole and the electric capacity C203 the first pole, its Iset mouth is connected to the second pole of the resistance R207 and the electric capacity C204 the first pole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720828840.6U CN206894304U (en) | 2017-07-10 | 2017-07-10 | A kind of charging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720828840.6U CN206894304U (en) | 2017-07-10 | 2017-07-10 | A kind of charging device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206894304U true CN206894304U (en) | 2018-01-16 |
Family
ID=61296466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720828840.6U Active CN206894304U (en) | 2017-07-10 | 2017-07-10 | A kind of charging device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206894304U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108321907A (en) * | 2018-04-03 | 2018-07-24 | 苏州瑞驱电动科技有限公司 | Slow charging circuit, converter circuit and its buffering method for electrically of BUCK circuits |
| CN109217407A (en) * | 2018-06-14 | 2019-01-15 | 美律电子(深圳)有限公司 | Electronic device |
-
2017
- 2017-07-10 CN CN201720828840.6U patent/CN206894304U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108321907A (en) * | 2018-04-03 | 2018-07-24 | 苏州瑞驱电动科技有限公司 | Slow charging circuit, converter circuit and its buffering method for electrically of BUCK circuits |
| CN109217407A (en) * | 2018-06-14 | 2019-01-15 | 美律电子(深圳)有限公司 | Electronic device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102258364B1 (en) | Rechargeable battery systems and rechargeable battery system operational method | |
| CN107800376A (en) | Safety switch for photovoltaic system | |
| CN100376068C (en) | Intelligent high-frequency accumulator charger | |
| CN104348192A (en) | USB charger of electronic cigarette | |
| CN203339772U (en) | Electronic cigarette USB charger | |
| CN208690959U (en) | Multiple groups charging and discharging lithium battery intelligent management system | |
| CN104037884A (en) | Charging method and device integrating quick-charging rules and USB charging rules | |
| CN108899982A (en) | The control method of multiple groups charging and discharging lithium battery intelligent management system | |
| CN204190424U (en) | A kind of charge-discharge protection circuit and charge-discharge system | |
| CN105406851A (en) | Single-livewire switch | |
| CN110380474A (en) | Battery protection controller and battery charge/discharge protection circuit | |
| CN206894304U (en) | A kind of charging device | |
| CN209658958U (en) | Series-connected cell group controls protective module | |
| JP2008148486A (en) | Charging method and circuit | |
| CN107040002A (en) | Balance-type charge and discharge device and method | |
| CN205829227U (en) | A kind of lithium rechargeable batteries change-over circuit | |
| CN103457314B (en) | A kind of switching mode single lithium battery charging and step-up discharge control chip | |
| CN104935058B (en) | A kind of battery charger for centralized meter reading terminal class product | |
| CN104218648A (en) | Charging and discharging protection circuit and charging and discharging system | |
| CN110365075A (en) | A kind of battery charger and method | |
| CN207098742U (en) | A kind of wide input module formula DC UPS circuit | |
| CN206364542U (en) | A kind of charging assembly | |
| CN104617617A (en) | Self-adaptive storage battery charging device | |
| CN103001293A (en) | Controller for charging storage battery with constant voltages and currents | |
| CN203415959U (en) | Charge and discharge protection device for lithium ion battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |