CN206250786U - A kind of aptitude chargeable circuit to lithium cell charging - Google Patents
A kind of aptitude chargeable circuit to lithium cell charging Download PDFInfo
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- CN206250786U CN206250786U CN201621176078.XU CN201621176078U CN206250786U CN 206250786 U CN206250786 U CN 206250786U CN 201621176078 U CN201621176078 U CN 201621176078U CN 206250786 U CN206250786 U CN 206250786U
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Abstract
The utility model is related to the technical field of aptitude chargeable circuit, more particularly to a kind of aptitude chargeable circuit to lithium cell charging, including the EMC circuits being sequentially connected from input to output end, primary side current rectifying and wave filtering circuit, energy storage circuit, absorbing circuit, switch transformed circuit and secondary side current rectifying and wave filtering circuit, also include constant-current control circuit, the single-chip microcomputer U4 of feedback branch and model HT46R01N, take full advantage of the output characteristics of the NMOS interfaces of single-chip microcomputer U4, the reference voltage of amplifier is directly modulated with the NMOS of single-chip microcomputer U4, so as to eliminate a switching tube, so as to simplify circuit structure and reduce cost.
Description
Technical field
The utility model is related to the technical field of aptitude chargeable circuit, more particularly to a kind of intelligence to lithium cell charging to fill
Circuit.
Background technology
At present, general aptitude chargeable circuit can all have constant current to export constant electric current to lithium cell charging
Control circuit, and constant-current control circuit is that electric current output is modulated by PWM current-modulations mode, traditional PWM electric currents are adjusted
Mode processed is filled so as to reach modulation as shown in figure 1, single-chip microcomputer modulates the reference voltage of amplifier by controlling a switching tube Q5
The purpose of electric size of current, however, increasing complexity and cost that a switching tube Q5 is undoubtedly the increase in circuit.
The content of the invention
The purpose of this utility model is to provide a kind of simple and low cost the intelligent charge electricity to lithium cell charging of circuit
Road.
The utility model provides a kind of aptitude chargeable circuit to lithium cell charging, including from input to output end successively
The EMC circuits of connection, primary side current rectifying and wave filtering circuit, energy storage circuit, absorbing circuit, switch transformed circuit and secondary side are whole
Stream filter circuit, also has the single-chip microcomputer of the HT46R01N of NMOS interfaces including constant-current control circuit, feedback branch and model
U4, the constant-current control circuit includes comparator U3A, diode D10, resistance R32, R33, R34, R38, R43, R44, electric capacity
C21, C27, are serially connected with resistance R38 and electric capacity C21 between the inverting input and output end of comparator U3A, comparator U3A's is anti-
On the one hand phase input connects the negative pole of charging output end through resistance R34, is on the other hand grounded through electric capacity C21, comparator U3A's
Normal phase input end is all connected with one end of resistance R33, R43, R44, and the other end of R33, R43, R44 connects ground, reference voltage respectively
End and single-chip microcomputer U4, the negative electrode of the output end connection diode D10 of comparator U3A, the anode of diode D10 connect the feedback
The input of branch road, the output end of the feedback branch connects the switch transformed circuit.
Wherein, the aptitude chargeable circuit also includes output voltage sampling circuit, and it includes resistance R39, R40, R41 and electric capacity
C25, resistance R39 and R40 are connected between the positive pole of charging output end and ground after being connected in series, one end connection electricity of electric capacity R41
The node of R39 and R40 is hindered, on the one hand its other end connects single-chip microcomputer U4, is on the other hand grounded through electric capacity C25.
Wherein, the aptitude chargeable circuit also includes that battery temperature controls circuit, and it includes comparator U3B, thermistor
RT2, resistance R25, R26, R27, R28, R29, R30, R31, R35, R36, R37, electric capacity C22, switching tube Q4, voltage-regulator diode ZD
With diode D11, the anode of the negative electrode connection diode D10 of voltage-regulator diode ZD, the anode connecting valve of voltage-regulator diode ZD
The colelctor electrode of pipe Q4, the grounded emitter of switching tube Q4, grid connection resistance R26, R25 and the electric capacity C22 of switching tube Q4, resistance
Altogether, on the one hand the other end of resistance R25 connects the output end of comparator U3B to the other end of R26 and electric capacity C22, on the other hand
+ 5V power supplys, one end of the normal phase input end connection resistance R28 of comparator U3B, its other end connection resistance are connect through 29, R30, R31
The other end of one end of R36 and thermistor RT2, resistance R36 and thermistor RT2 connects+5V power supplys through R35, comparator U3B's
One end of inverting input connection resistance R27, one end of the other end connection resistance R37 of resistance R27, the other end of resistance R37
The anode and single-chip microcomputer U4 of diode D11 are connected respectively.
Wherein, the aptitude chargeable circuit also includes that LED1 and LED2, LED1 and LED2 are all connected with single-chip microcomputer U4.
Beneficial effect：A kind of aptitude chargeable circuit to lithium cell charging of the utility model, it utilizes model
The single-chip microcomputer U4 of HT46R01N, takes full advantage of the output characteristics of the NMOS interfaces of single-chip microcomputer U4, directly with single-chip microcomputer U4's
NMOS modulates the reference voltage of amplifier, so as to eliminate a switching tube, so as to simplify circuit structure and reduce cost.
Brief description of the drawings
Using accompanying drawing, the utility model is described in further detail, but embodiment in accompanying drawing is not constituted to of the present utility model
Any limitation, for one of ordinary skill in the art, on the premise of not paying creative work, can also be according to following attached
Figure obtains other accompanying drawings.
Fig. 1 is the circuit theory diagrams of the constant-current control circuit of existing aptitude chargeable circuit.
Fig. 2 is a kind of circuit theory diagrams of aptitude chargeable circuit to lithium cell charging of the utility model.
Fig. 3 is that the circuit of the constant-current control circuit in a kind of aptitude chargeable circuit to lithium cell charging of the utility model is former
Reason figure.
Fig. 4 is the electricity of the output voltage sampling circuit in a kind of aptitude chargeable circuit to lithium cell charging of the utility model
Road schematic diagram.
Fig. 5 is the electricity of the battery temperature control circuit in a kind of aptitude chargeable circuit to lithium cell charging of the utility model
Road schematic diagram.
Fig. 6 is the circuit theory of the single-chip microcomputer U4 in a kind of aptitude chargeable circuit to lithium cell charging of the utility model
Figure.
Include in Fig. 2 to Fig. 6：1 --- EMC circuits, 2 --- primary side current rectifying and wave filtering circuit, 3 --- energy storage electricity
Road, 4 --- absorbing circuit, 5 --- switch transformed circuit, 6 --- secondary side current rectifying and wave filtering circuit, 7 --- feedback branch,
8 --- constant-current control circuit, 9 --- output voltage sampling circuit, 10 --- battery temperature control circuits.
Specific embodiment
The utility model is further described with the following Examples.
A kind of circuit theory diagrams of aptitude chargeable circuit to lithium cell charging of the utility model are as shown in Fig. 2 the intelligence
Charging circuit includes the EMC circuits 1, primary side current rectifying and wave filtering circuit 2, the energy storage electricity that are sequentially connected from input to output end
Road 3, absorbing circuit 4, switch transformed circuit 5 and secondary side current rectifying and wave filtering circuit 6, also including constant-current control circuit 8, feedback branch
7 and model have NMOS interfaces HT46R01N single-chip microcomputer U4.As shown in figure 3,8 tunnels of current constant control electricity include comparator
U3A, diode D10, resistance R32, R33, R34, R38, R43, R44, electric capacity C21, C27, the inverting input of comparator U3A and
Resistance R38 and electric capacity C21 is serially connected between output end, on the one hand the inverting input of comparator U3A connects through resistance R34 and charge
The negative pole of output end, is on the other hand grounded through electric capacity C21, and the normal phase input end of comparator U3A is all connected with resistance R33, R43, R44
One end, the output end that the other end of R33, R43, R44 connects ground, reference voltage terminal and single-chip microcomputer U4, comparator U3A respectively connects
The negative electrode of diode D10 is connect, the anode of diode D10 connects the input of feedback branch 7, the output end connection of feedback branch 7
Switch transformed circuit 5.Using the single-chip microcomputer U4 of model HT46R01N, the output of the NMOS interfaces of single-chip microcomputer U4 is taken full advantage of
Characteristic, directly modulates the reference voltage of amplifier with the NMOS of single-chip microcomputer U4, so as to eliminate a switching tube, so as to simplify
Circuit structure and reduce cost.
As shown in figure 4, going out voltage sampling circuit includes resistance R39, R40, R41 and electric capacity C25, resistance R39 and R40 series connection
It is connected to after connection between the positive pole of charging output end and ground, one end of electric capacity R41 connects the node of resistance R39 and R40, and its is another
On the one hand one end connects single-chip microcomputer U4, is on the other hand grounded through electric capacity C25.
As shown in figure 5, battery temperature control circuit include comparator U3B, thermistor RT2, resistance R25, R26, R27,
R28, R29, R30, R31, R35, R36, R37, electric capacity C22, switching tube Q4, voltage-regulator diode ZD and diode D11, the pole of voltage stabilizing two
The anode of the negative electrode connection diode D10 of pipe ZD, the colelctor electrode of the anode connecting valve pipe Q4 of voltage-regulator diode ZD, switching tube Q4
Grounded emitter, switching tube Q4 grid connection resistance R26, R25 and electric capacity C22, the other end of resistance R26 and electric capacity C22
Altogether, on the one hand the other end of resistance R25 connects the output end of comparator U3B, on the other hand connects+5V electricity through 29, R30, R31
Source, one end of the normal phase input end connection resistance R28 of comparator U3B, its other end connection resistance R36's and thermistor RT2
The other end of one end, resistance R36 and thermistor RT2 connects+5V power supplys, the inverting input connection resistance of comparator U3B through R35
One end of R27, one end of the other end connection resistance R37 of resistance R27, the other end of resistance R37 connects diode D11's respectively
Anode and single-chip microcomputer U4.The temperature of lithium battery is detected using thermistor RT2, when the temperature of lithium battery is higher than setting value, electricity
Pond temperature-control circuit will send a signal to single-chip microcomputer U4, and single-chip microcomputer U4 can then suspend charging, until the temperature of lithium battery is low
In after setting value, then charged.
As shown in fig. 6, LED1 and LED2 are all connected with single-chip microcomputer U4, LED1 and LED2 can show charged state, work as intelligence
During charging circuit insertion power supply, LED1 and LED2 are lighted, and represent that aptitude chargeable circuit has been powered；When lithium battery accesses intelligence
During charging circuit, LED1 is lighted, and represents that lithium battery charges；After lithium battery is fully charged, LED2 is lighted, and has represented lithium battery
Through being full of；When LED1 and LED2 flash, the exception that charges is represented.
Finally it should be noted that above example is only used to illustrate the technical solution of the utility model, rather than to this reality
With the limitation of novel protected scope, although being explained to the utility model with reference to preferred embodiment, this area it is general
It is logical it will be appreciated by the skilled person that can be modified to the technical solution of the utility model or equivalent, without deviating from this
The spirit and scope of utility model technical scheme.
Claims (4)
1. a kind of aptitude chargeable circuit to lithium cell charging, it is characterised in that be sequentially connected including from input to output end
EMC circuits, primary side current rectifying and wave filtering circuit, energy storage circuit, absorbing circuit, switch transformed circuit and secondary side rectification filter
Wave circuit, the single-chip microcomputer U4 also including constant-current control circuit, feedback branch and model with the HT46R01N of NMOS interfaces, institute
State constant-current control circuit including comparator U3A, diode D10, resistance R32, R33, R34, R38, R43, R44, electric capacity C21,
Resistance R38 and electric capacity C21 is serially connected between the inverting input and output end of C27, comparator U3A, comparator U3A's is anti-phase defeated
Enter the negative pole that on the one hand end connects charging output end through resistance R34, be on the other hand grounded through electric capacity C21, the positive of comparator U3A
Input is all connected with one end of resistance R33, R43, R44, the other end of R33, R43, R44 connect respectively ground, reference voltage terminal and
The negative electrode of the output end connection diode D10 of single-chip microcomputer U4, comparator U3A, the anode of diode D10 connects the feedback branch
Input, the output end of the feedback branch connects the switch transformed circuit.
2. a kind of aptitude chargeable circuit to lithium cell charging according to claim 1, it is characterised in that also including output
Voltage sampling circuit, it includes that resistance R39, R40, R41 and electric capacity C25, resistance R39 and R40 are connected to charging after being connected in series
Between the positive pole and ground of output end, one end of electric capacity R41 connects the node of resistance R39 and R40, and on the one hand its other end connects single
Piece machine U4, is on the other hand grounded through electric capacity C25.
3. a kind of aptitude chargeable circuit to lithium cell charging according to claim 2, it is characterised in that also including battery
Temperature-control circuit, it include comparator U3B, thermistor RT2, resistance R25, R26, R27, R28, R29, R30, R31, R35,
R36, R37, electric capacity C22, switching tube Q4, voltage-regulator diode ZD and diode D11, the negative electrode connection diode of voltage-regulator diode ZD
The anode of D10, the colelctor electrode of the anode connecting valve pipe Q4 of voltage-regulator diode ZD, the grounded emitter of switching tube Q4, switching tube
Q4 grid connection resistance R26, R25 and electric capacity C22, the other end of resistance R26 and electric capacity C22 altogether, the other end of resistance R25
On the one hand the output end of connection comparator U3B, on the other hand connects+5V power supplys, the positive input of comparator U3B through 29, R30, R31
End connects one end of resistance R28, and its other end connects one end of resistance R36 and thermistor RT2, resistance R36 and thermistor
The other end of RT2 connects+5V power supplys through R35, and the inverting input of comparator U3B connects one end of resistance R27, and resistance R27's is another
One end connects one end of resistance R37, and the other end of resistance R37 connects the anode and single-chip microcomputer U4 of diode D11 respectively.
4. a kind of aptitude chargeable circuit to lithium cell charging according to claim 1, it is characterised in that also including LED1
And LED2, LED1 and LED2 are all connected with single-chip microcomputer U4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621176078.XU CN206250786U (en) | 2016-11-03 | 2016-11-03 | A kind of aptitude chargeable circuit to lithium cell charging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621176078.XU CN206250786U (en) | 2016-11-03 | 2016-11-03 | A kind of aptitude chargeable circuit to lithium cell charging |
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| Publication Number | Publication Date |
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| CN206250786U true CN206250786U (en) | 2017-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621176078.XU Active CN206250786U (en) | 2016-11-03 | 2016-11-03 | A kind of aptitude chargeable circuit to lithium cell charging |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108110872A (en) * | 2018-02-26 | 2018-06-01 | 浙江聚源电子有限公司 | A kind of charger of adjust automatically charging voltage |
-
2016
- 2016-11-03 CN CN201621176078.XU patent/CN206250786U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108110872A (en) * | 2018-02-26 | 2018-06-01 | 浙江聚源电子有限公司 | A kind of charger of adjust automatically charging voltage |
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