CN207504604U - Maximum current charging circuit may be selected - Google Patents
Maximum current charging circuit may be selected Download PDFInfo
- Publication number
- CN207504604U CN207504604U CN201721400671.2U CN201721400671U CN207504604U CN 207504604 U CN207504604 U CN 207504604U CN 201721400671 U CN201721400671 U CN 201721400671U CN 207504604 U CN207504604 U CN 207504604U
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- electrically connected
- photoelectrical coupler
- unit
- resistance
- capacity
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 42
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 42
- 230000005611 electricity Effects 0.000 claims description 21
- 230000005622 photoelectricity Effects 0.000 claims description 5
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 2
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000518 rheometry Methods 0.000 description 1
- 102220207965 rs778468876 Human genes 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000013396 workstream Methods 0.000 description 1
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The utility model discloses a kind of optional maximum current charging circuits, it includes power circuit unit, Auxiliary Power Units, current control unit and capacity recognition unit, power circuit unit is electrically connected with Auxiliary Power Units, and Auxiliary Power Units are electrically connected with current control unit；Capacity recognition unit is electrically connected with current control unit, and capacity recognition unit is electrically connected with lithium battery pack, and lithium battery pack is provided with ID interfaces.The utility model is by setting the first photoelectrical coupler, the second photoelectrical coupler, third photoelectrical coupler, first resistor, second resistance and 3rd resistor is coordinated to be electrically connected respectively with the collector of photoelectrical coupler, it is electrically connected by capacity recognition unit and lithium battery pack, compare the anti-phase input terminal voltage of comparator with the voltage of ID interfaces to control whether photoelectrical coupler acts, so as to which matched charging current be selected to charge lithium battery pack, it is easy to use, increase the ability that lithium battery charging circuit is compatible with a variety of capacity Lithium batteries packets.
Description
Technical field
The utility model is related to consumer electronics field, more particularly, to a kind of optional maximum current charging circuit.
Background technology
The single capacity Lithium batteries packet of traditional charger needs a kind of specialized lithium electricity charger of arranging in pairs or groups, and can extend lithium electricity in this way
The bulk life time of Chi Bao and optimal charge time.Different size capacity batteries packet is stretched out as the needs of various occasions can spread out,
Can arrange in pairs or groups the dedicated charger of each capacity in a variety of capacity batteries packets, can cause to use upper trouble in this way.Such as large capacity electricity
Chi Bao is put into small-capacity cells packet collocation charger, and charging current is too small to lengthen its charging time, leads to user not side
Just；Or small-capacity cells packet is put into the charger of large-capacity battery pack collocation, can make its shorter battery life because of charging electricity
It flows through big.
Conventional charging circuit as shown in Figure 1 uses primary constant-current and constant-voltage control circuit, wherein, resistance R2 ' is setting
The main components of maximum charging current, the output interface of charger include V+ ', V- ', NTC ', ID ' 4, respectively matching and lithium
Battery pack contacts together.
Utility model content
Based on this, it is necessary to for above-mentioned background technology there are the problem of, a kind of optional maximum current charging electricity is provided
Road simplifies lithium battery pack charging circuit, easy to use, increases the energy that lithium battery charger is compatible with a variety of capacity Lithium batteries packets
Power.
To achieve the above object, the utility model discloses a kind of optional maximum current charging circuit, including power supply
Circuit unit, Auxiliary Power Units, current control unit and capacity recognition unit, the power circuit unit and accessory power supply list
Member is electrically connected, and the power circuit unit is used to provide voltage and electricity needed for Auxiliary Power Units and current control unit work
Stream, the Auxiliary Power Units are electrically connected with current control unit；The Auxiliary Power Units be provided with primary source unit,
Secondary power unit and transformer unit, the current control unit are electrically connected with primary source unit, the secondary power
Unit provides voltage and current needed for lithium battery pack charging, and the transformer unit includes transformer, and the transformer electrically connects
It is connected between the primary source unit and secondary power unit；The capacity recognition unit electrically connects with current control unit
It connects, the capacity recognition unit is electrically connected with lithium battery pack, and the lithium battery pack is provided with ID interfaces, and the ID interfaces are with holding
Recognition unit is measured to be electrically connected.
The current control unit includes master control resistance, first resistor, second resistance, the in one of the embodiments,
Three resistance, the first photoelectrical coupler, the second photoelectrical coupler and third photoelectrical coupler, described master control resistance one end, the first electricity
It hinders one end, second resistance one end and 3rd resistor one end to be electrically connected with primary source unit respectively, the master control resistance is another
End ground connection, the first resistor other end are electrically connected the collector of the first photoelectrical coupler triode, the first photoelectricity coupling
The emitter ground connection of clutch triode, the second resistance other end are electrically connected the current collection of the second photoelectrical coupler triode
Pole, the emitter ground connection of the second photoelectrical coupler triode, the 3rd resistor other end are electrically connected third photoelectricity coupling
The collector of clutch triode, the emitter ground connection of the third photoelectrical coupler triode.
The capacity recognition unit includes the first capacity identification circuit in one of the embodiments, the second capacity identifies
Circuit and third capacity identification circuit, the first capacity identification circuit include first comparator and the first photoelectrical coupler, institute
The in-phase input end for stating first comparator is electrically connected by the 4th resistance and ID interfaces, the output terminal electricity of the first comparator
Property connection the first photoelectrical coupler diode anode, the minus earth of the first photoelectrical coupler diode；Described second
Capacity identification circuit includes the second comparator and the second photoelectrical coupler, and the in-phase input end of second comparator passes through the 5th
Resistance is electrically connected with ID interfaces, and the output terminal of second comparator is electrically connected the sun of the second photoelectrical coupler diode
Pole, the minus earth of the second photoelectrical coupler diode；The third capacity identification circuit includes third comparator and the
Three photoelectrical couplers, the in-phase input end of the third comparator are electrically connected by the 6th resistance and ID interfaces, the third
The output terminal of comparator is electrically connected the anode of third photoelectrical coupler diode, the moon of the third photoelectrical coupler diode
Pole is grounded.
The capacity recognition unit further includes the 7th resistance in one of the embodiments, described 7th resistance one end with
ID interfaces are electrically connected, the 7th resistance other end ground connection.
In conclusion maximum current charging circuit may be selected by setting the first photoelectrical coupler, second in the utility model
Photoelectrical coupler, third photoelectrical coupler, cooperation first resistor, second resistance and 3rd resistor respectively with the collection of photoelectrical coupler
Electrode is electrically connected, and is electrically connected by capacity recognition unit and lithium battery pack, by comparing the inverting input electricity of comparator
The voltage with ID interfaces is pressed to control whether photoelectrical coupler acts, so as to select matched charging current to lithium electricity
Chi Bao charges, easy to use, increases the ability that lithium battery charging circuit is compatible with a variety of capacity Lithium batteries packets.
Description of the drawings
Fig. 1 is the circuit diagram of traditional charging circuit；
A kind of circuit diagram of embodiment of maximum current charging circuit may be selected for the utility model in Fig. 2；
Fig. 3 is the circuit diagram inside the utility model lithium battery pack；
Fig. 4 is the circuit diagram of the utility model capacity recognition unit.
Specific embodiment
As shown in Figures 2 to 4, the utility model may be selected maximum current charging circuit and include power circuit unit 100, auxiliary
Help power supply unit 200, current control unit 300 and capacity recognition unit 400, the power circuit unit 100 and accessory power supply
Unit 200 is electrically connected, and the power circuit unit 100 is used to provide Auxiliary Power Units 200 and current control unit 300 work
Voltage and current needed for work, the Auxiliary Power Units 200 are electrically connected with current control unit 300, the accessory power supply list
Member 200 is traditional primary constant-current and constant-voltage control circuit, and the Auxiliary Power Units 200 are provided with primary source unit 210, secondary
Level power supply unit 220 and transformer unit 230, the current control unit 300 are electrically connected with primary source unit 210, institute
It states secondary power unit 220 lithium battery pack 500 is provided and charge required voltage and current, the transformer unit 230 includes transformation
Device T, the transformer T are electrically connected between the primary source unit 210 and secondary power unit 220；The capacity is known
Other unit 400 is electrically connected with current control unit 300, and the capacity recognition unit 400 is used to identify the electricity of lithium battery pack 500
Tankage.
Specifically, the current control unit 300 includes master control resistance R2, first resistor Rb, second resistance Rc, third electricity
Hinder Rd, the first photoelectrical coupler triode U2A, the second photoelectrical coupler triode U3A and third photoelectrical coupler triode
U4A, described master control resistance R2 one end, first resistor Rb one end, second resistance Rc one end and 3rd resistor Rd one end respectively with just
Level power supply unit 210 is electrically connected, master control resistance R2 other ends ground connection, and the first resistor Rb other ends are electrically connected the
The collector of one photoelectrical coupler triode U2A, the emitter ground connection of the first photoelectrical coupler triode U2A, described the
The two resistance Rc other ends are electrically connected the collector of the second photoelectrical coupler triode U3A, three pole of the second photoelectrical coupler
The emitter ground connection of pipe U3A, the 3rd resistor Rd other ends are electrically connected the current collection of third photoelectrical coupler triode U4A
Pole, the emitter ground connection of the third photoelectrical coupler triode U4A.
The capacity recognition unit 400 is electrically connected with lithium battery pack 500, and voltage stabilizing is provided in the lithium battery pack 500
The reference voltage for 5V is exported, the lithium battery pack 500 is provided with ID interfaces 510, the ID interfaces 510 and capacity recognition unit
400 are electrically connected, and to identify the battery capacity of lithium battery pack 500, the lithium battery pack 500 has internal resistance of cell R_ID, institute
Internal resistance of cell R_ID is stated to connect with ID interfaces 510；The capacity recognition unit 400 includes the first capacity identification circuit 410, second
Capacity identification circuit 420 and third capacity identification circuit 430, the first capacity identification circuit 410 include first comparator
The in-phase input end of U20A and the first photoelectrical coupler diode U2B, the first comparator U20A by the 4th resistance R27 with
ID interfaces 510 are electrically connected, and the output terminal of the first comparator U20A is electrically connected the first photoelectrical coupler diode U2B's
Anode, the minus earth of the first photoelectrical coupler diode U2B；The second capacity identification circuit 420 includes the second ratio
Pass through the 5th resistance compared with device U20B and the second photoelectrical coupler diode U3B, the in-phase input end of the second comparator U20B
R37 and ID interfaces 510 are electrically connected, and the output terminal of the second comparator U20B is electrically connected the second photoelectrical coupler diode
The anode of U3B, the minus earth of the second photoelectrical coupler diode U3B；The third capacity identification circuit 430 includes the
Three comparator U20C and third photoelectrical coupler diode U4B, the in-phase input end of the third comparator U20C pass through the 6th
Resistance 47 and ID interfaces 510 are electrically connected, and the output terminal of the third comparator U20C is electrically connected third photoelectrical coupler two
The anode of pole pipe U4B, the minus earth of the third photoelectrical coupler diode U4B.
Wherein, the first photoelectrical coupler triode U2A and the first photoelectrical coupler diode U2B forms complete first light
Electric coupler, the second photoelectrical coupler triode U3A and the second photoelectrical coupler diode U3B form complete second photoelectricity coupling
Clutch, third photoelectrical coupler triode U4A and third photoelectrical coupler diode U4B form complete third photoelectric coupling
Device.
The capacity recognition unit 400 further includes the 7th resistance R28, described 7th resistance R28 one end and 510 electricity of ID interfaces
Property connection, the 7th resistance R28 other ends ground connection, voltage is the homophase input terminal voltage of comparator at the ID interfaces 510,
The voltage of the in-phase input end of comparator and the inverting input of comparator is compared, as long as the in-phase input end electricity of comparator
For pressure more than the anti-phase input terminal voltage of comparator, photoelectrical coupler is action；On the contrary, the anti-phase input terminal voltage of comparator is big
In the voltage of the in-phase input end of comparator, photoelectrical coupler is failure to actuate.
When the utility model is specifically used, the lithium battery pack 500 of battery capacity 2Ah, 4Ah, 6Ah, 8Ah is selected to carry out respectively
Charging, wherein battery capacity be 2Ah, 4Ah, 6Ah, 8Ah lithium battery pack 500 internal resistance be respectively 680K, 330K, 100K,
51K selects the resistance value R28=100K of the 7th resistance R28, at this point, when capacity recognition unit 400 electrically connects with lithium battery pack 500
When connecing, the voltage value at ID interfaces 510 is respectively 0.641V, 1.162V, 2.5V, 3.311V.
When the utility model charges to the lithium battery pack 500 that battery capacity is 2Ah, the negative terminal electricity of three comparators
Minimum 1V is pressed, at this point, the first photoelectrical coupler, the second photoelectrical coupler and third photoelectrical coupler are failure to actuate, therefore
Master control resistance R2, first resistor Rb, second resistance Rc, 3rd resistor Rd equivalent resistances are master control electricity in current control unit 300
The resistance value of R2 is hindered, the output current of primary source unit 210 will not change, thus the output current of secondary power unit 220
It will not change.
When the utility model charges to the lithium battery pack 500 that battery capacity is 4Ah, first comparator U20A negative terminals
Voltage for 1V, the voltage of the second comparator U20B negative terminals is 2V, at this point, the first photoelectrical coupler diode U2B is connected, first
Photoelectrical coupler triode U2A is connected, and the second photoelectrical coupler, third photoelectrical coupler are failure to actuate, master control resistance R2 and first
Resistance Rb is in and is connected in parallel state, and the total resistance value of resistor coupled in parallel becomes smaller, then the output current of primary source unit 210 becomes larger, because
And the output current of secondary power unit 220 becomes greatly 4A, is effectively guaranteed the maximum current and battery capacity of charging circuit
Matching stability.
Similarly, when utility model charges to the lithium battery pack 500 that battery capacity is 6Ah, first comparator U20A
The voltage of negative terminal is 1V, and the voltage of the second comparator U20B negative terminals is 2V, and the voltage of third comparator U20C negative terminals is 3V, this
When, the first photoelectrical coupler, the action of the second photoelectrical coupler, third photoelectrical coupler are failure to actuate, the electricity of master control resistance R2 and first
Resistance Rb, second resistance Rc, which are in, is connected in parallel state, and the total resistance value of resistor coupled in parallel becomes smaller, then the output electricity of primary source unit 210
Rheology is big, thus the output current of secondary power unit 220 becomes greatly 6A.
When utility model charges to the lithium battery pack 500 that battery capacity is 8Ah, first comparator U20A negative terminals
Voltage is 1V, and the voltage of the second comparator U20B negative terminals is 2V, and the voltage of the second comparator U20C negative terminals is 3V, at this point, first
Photoelectrical coupler, the second photoelectrical coupler, the action of third photoelectrical coupler, master control resistance R2 and first resistor Rb, second resistance
Rc, 3rd resistor Rd are in and are connected in parallel state, and the total resistance value of resistor coupled in parallel becomes smaller, then the output current of primary source unit 210
Become larger, thus the output current of secondary power unit 220 becomes greatly 8A.
In conclusion maximum current charging circuit may be selected by setting the first photoelectrical coupler, second in the utility model
Photoelectrical coupler, third photoelectrical coupler, cooperation first resistor Rb, second resistance Rc and 3rd resistor Rd respectively with photoelectric coupling
The collector of device is electrically connected, and is electrically connected by capacity recognition unit 400 and lithium battery pack 500, by comparing comparator
Anti-phase input terminal voltage is controlled with the voltage at ID interfaces 510 whether photoelectrical coupler acts, so as to select to match
Charging current charge to lithium battery pack 500, it is easy to use, increase lithium battery charging circuit and be compatible with a variety of capacity Lithium batteries
The ability of packet 500.
Embodiment described above only expresses the several embodiments of the utility model, and description is more specific and detailed,
But it should not be interpreted as limiting the scope of the present invention.It should be pointed out that for the common of this field
For technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these all belong to
In the scope of protection of the utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (4)
1. a kind of optional maximum current charging circuit, it is characterised in that：Including power circuit unit, Auxiliary Power Units, electricity
Flow control unit and capacity recognition unit, the power circuit unit are electrically connected with Auxiliary Power Units, the power circuit
Unit is used to provide voltage and current needed for Auxiliary Power Units and current control unit work, the Auxiliary Power Units and electricity
Flow control unit is electrically connected；The Auxiliary Power Units are provided with primary source unit, secondary power unit and transformer list
Member, the current control unit are electrically connected with primary source unit, and the secondary power unit provides lithium battery pack charging institute
Need voltage and current, the transformer unit includes transformer, the transformer be electrically connected at the primary source unit with
Between secondary power unit；The capacity recognition unit is electrically connected with current control unit, the capacity recognition unit and lithium
Battery pack is electrically connected, and the lithium battery pack is provided with ID interfaces, and the ID interfaces are electrically connected with capacity recognition unit.
2. optional maximum current charging circuit according to claim 1, it is characterised in that：The current control unit packet
Include master control resistance, first resistor, second resistance, 3rd resistor, the first photoelectrical coupler triode, three pole of the second photoelectrical coupler
Pipe and third photoelectrical coupler triode, described master control resistance one end, first resistor one end, second resistance one end and 3rd resistor
One end is electrically connected respectively with primary source unit, the master control resistance other end ground connection, and the first resistor other end is electrical
Connect the collector of the first photoelectrical coupler triode, the emitter ground connection of the first photoelectrical coupler triode, described the
The two resistance other ends are electrically connected the collector of the second photoelectrical coupler triode, the hair of the second photoelectrical coupler triode
Emitter grounding, the 3rd resistor other end are electrically connected the collector of third photoelectrical coupler triode, the third photoelectricity
The emitter ground connection of coupler triode.
3. optional maximum current charging circuit according to claim 1 or 2, it is characterised in that：The capacity identification is single
Member includes the first capacity identification circuit, the second capacity identification circuit and third capacity identification circuit, the first capacity identification electricity
Road includes first comparator and the first photoelectrical coupler diode, and the in-phase input end of the first comparator passes through the 4th resistance
It is electrically connected with ID interfaces, the output terminal of the first comparator is electrically connected the anode of the first photoelectrical coupler diode, institute
State the minus earth of the first photoelectrical coupler diode；The second capacity identification circuit includes the second comparator and the second photoelectricity
Coupler diode, the in-phase input end of second comparator are electrically connected by the 5th resistance and ID interfaces, and described second
The output terminal of comparator is electrically connected the anode of the second photoelectrical coupler diode, the moon of the second photoelectrical coupler diode
Pole is grounded；The third capacity identification circuit includes third comparator and third photoelectrical coupler diode, the third compare
The in-phase input end of device is electrically connected by the 6th resistance and ID interfaces, and the output terminal of the third comparator is electrically connected third
The anode of photoelectrical coupler diode, the minus earth of the third photoelectrical coupler diode.
4. optional maximum current charging circuit according to claim 3, it is characterised in that：The capacity recognition unit is also
Including the 7th resistance, described 7th resistance one end is electrically connected with ID interfaces, the 7th resistance other end ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721400671.2U CN207504604U (en) | 2017-10-26 | 2017-10-26 | Maximum current charging circuit may be selected |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721400671.2U CN207504604U (en) | 2017-10-26 | 2017-10-26 | Maximum current charging circuit may be selected |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207504604U true CN207504604U (en) | 2018-06-15 |
Family
ID=62502161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721400671.2U Expired - Fee Related CN207504604U (en) | 2017-10-26 | 2017-10-26 | Maximum current charging circuit may be selected |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207504604U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107733023A (en) * | 2017-10-26 | 2018-02-23 | 东莞启益电器机械有限公司 | Maximum current charging circuit may be selected |
-
2017
- 2017-10-26 CN CN201721400671.2U patent/CN207504604U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107733023A (en) * | 2017-10-26 | 2018-02-23 | 东莞启益电器机械有限公司 | Maximum current charging circuit may be selected |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180615 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |