CN206712509U - A kind of lithium battery intelligent charging circuit - Google Patents
A kind of lithium battery intelligent charging circuit Download PDFInfo
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- CN206712509U CN206712509U CN201720500913.9U CN201720500913U CN206712509U CN 206712509 U CN206712509 U CN 206712509U CN 201720500913 U CN201720500913 U CN 201720500913U CN 206712509 U CN206712509 U CN 206712509U
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- lithium battery
- resistance
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- amplifier
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Abstract
Lithium cell charging technology is the utility model is related to, specifically a kind of lithium battery intelligent charging circuit.The utility model solves the problems, such as that traditional lithium cell charging method easily causes battery medium and electrode occurs uneven injury, easily causes battery capacity loss.A kind of lithium battery intelligent charging circuit, including Switching Power Supply, voltage-dropping type DC DC converters, lithium battery, the first amplifier, the second amplifier, Schottky diode, light emitting diode, inductance, the first to the 6th electric capacity, adjustable resistance, the second to the tenth resistance, single-chip microcomputer；Wherein, the positive pole of Switching Power Supply is connected with the supply voltage input pin of voltage-dropping type DC DC converters；The negative pole ground connection of Switching Power Supply；On the one hand the power switch output pin of voltage-dropping type DC DC converters is connected by the positive pole of inductance and lithium battery, on the other hand pass sequentially through the voltage sampling signal input connection of inductance, the 5th resistance and single-chip microcomputer.The utility model is applied to lithium cell charging.
Description
Technical field
Lithium cell charging technology is the utility model is related to, specifically a kind of lithium battery intelligent charging circuit.
Background technology
Traditional lithium cell charging method mainly has constant-current charge method, constant-voltage charge method, modified constant-voltage charge method, constant current voltage limiting
Constant-voltage charge method etc. after mise-a-la-masse method, first constant current.These methods are easier to realize, but are the problem of exist jointly：Easily cause
Battery medium and electrode occur uneven injury, easily cause battery capacity loss.Based on this, it is necessary to invent a kind of brand-new
Lithium battery charging circuit, to solve above mentioned problem existing for traditional lithium cell charging method.
The content of the invention
In order to solve, traditional lithium cell charging method easily causes battery medium to the utility model and electrode generation is uneven
Injure, easily cause the problem of battery capacity loss, there is provided a kind of lithium battery intelligent charging circuit.
The utility model adopts the following technical scheme that realization：
A kind of lithium battery intelligent charging circuit, including Switching Power Supply, buck mode DC-DC converter, lithium battery, the first fortune
Put, the second amplifier, Schottky diode, light emitting diode, inductance, the first to the 6th electric capacity, adjustable resistance, second to the tenth electricity
Resistance, single-chip microcomputer；
Wherein, the supply voltage input pin of the positive pole of Switching Power Supply and buck mode DC-DC converter connects；Switching Power Supply
Negative pole ground connection；On the one hand the power switch output pin of buck mode DC-DC converter is connected by the positive pole of inductance and lithium battery
Connect, on the other hand pass sequentially through the voltage sampling signal input connection of inductance, the 5th resistance and single-chip microcomputer；Buck DC-DC
The grounding pin ground connection of converter；On the one hand the negative pole of lithium battery is connected with the positive input terminal of the first amplifier, on the other hand pass through
The voltage sampling signal input of 6th resistance and single-chip microcomputer connects, and the third aspect passes through the 9th resistance eutral grounding；First amplifier
On the one hand negative input end is connected by the 7th resistance with the output end of the first amplifier, on the other hand pass through the 8th resistance eutral grounding；The
The output end of one amplifier is connected with the negative input end of the second amplifier and the current sampling signal input of single-chip microcomputer respectively；Second fortune
On the one hand the positive input terminal put is connected by 3rd resistor and the pwm signal output end of single-chip microcomputer, on the other hand pass through the 4th electricity
Resistance ground connection；The output end of second amplifier and the anode of light emitting diode connect；The negative electrode one side and voltage-dropping type of light emitting diode
The feedback pin connection of dc-dc, on the other hand pass sequentially through the tenth resistance, second resistance ground connection；
The negative electrode of Schottky diode and the power switch output pin of buck mode DC-DC converter connect；Schottky two
The plus earth of pole pipe；One fixing end of adjustable resistance and the positive pole of lithium battery connect, and another fixing end passes through the second electricity
Resistance ground connection；The sliding end of adjustable resistance and the positive pole of lithium battery connect；One end of first electric capacity and the positive pole of Switching Power Supply connect,
The other end is grounded；One end of second electric capacity and the positive pole of Switching Power Supply connect, other end ground connection；The both ends of 3rd electric capacity respectively with
The supply voltage input pin of buck mode DC-DC converter connects with internal voltage regulator shunt location pin；The one of 4th electric capacity
End is connected with the positive pole of lithium battery, other end ground connection；One end of 5th electric capacity and the positive pole of lithium battery connect, other end ground connection；
The both ends of 6th electric capacity are connected with the positive input terminal and output end of the second amplifier respectively.
During work, Switching Power Supply provides input voltage for buck mode DC-DC converter, buck mode DC-DC converter it is defeated
Go out voltage-drop loading to lithium battery, thus lithium battery is charged.In charging process, single-chip microcomputer is on the one hand via voltage sample
Signal input part gathers the charging voltage signal of lithium battery, on the other hand gathers lithium battery via current sampling signal input
Charging current signal, current charged state is then judged according to the charging voltage signal and charging current signal that collect,
And according to the charging characteristics of current state, pwm control signal is exported via pwm signal output end, thus by the charging of lithium battery
State is adjusted to optimal.Specific adjustment process is as follows：After pwm control signal is depressured by 3rd resistor and the 4th resistance,
New pwm control signal is obtained compared with the charging current signal of current sampling signal input is in the second amplifier, PWM controls
Signal processed is loaded into the feedback pin of buck mode DC-DC converter via light emitting diode, thus controls buck DC-DC conversion
Device carries out break-make, so as to control the output voltage of buck mode DC-DC converter to be exported for PWM.In above process, the first electricity
Hold, the effect of the second electric capacity is to carry out voltage stabilizing and filtering to the input voltage of buck mode DC-DC converter.3rd electric capacity is decompression
The required shunt capacitance of type dc-dc work institute.The effect of 4th electric capacity, the 5th electric capacity, inductance is that buck DC-DC is turned
The output voltage of parallel operation carries out smooth and filtering.The bleeder circuit that first resistor and second resistance are formed is used to control voltage-dropping type
The output voltage of dc-dc.The bleeder circuit that 5th resistance and the 6th resistance are formed is used for the charging voltage of lithium battery
It is adjusted to the collectable voltage range of single-chip microcomputer.The amplification electricity that 7th resistance, the 8th resistance, the 9th resistance, the first amplifier are formed
Road is used to the charging current of lithium battery being adjusted to the collectable electric current section of single-chip microcomputer.Tenth resistance is used for voltage-dropping type DC-
The pwm control signal of DC converter feedback pins is isolated with voltage feedback signal.Schottky diode is voltage clamp, is used
In protection late-class circuit.Light emitting diode is used for state instruction.
Based on said process, compared with traditional lithium cell charging method, a kind of lithium battery intelligent described in the utility model
Charging circuit realizes the charged state of lithium battery being adjusted to optimal, thus achieve lithium battery by using brand new
Intelligent charge, lithium cell charging is abundant, electrolyte is uniform so as to being effectively ensured, and then on the one hand effectively prevent battery medium
Uneven injury occurs with electrode, on the other hand effectively prevent battery capacity loss.
The utility model is rational in infrastructure, ingenious in design, efficiently solves traditional lithium cell charging method and easily causes battery
Medium and electrode occur uneven injury, easily cause the problem of battery capacity loss, suitable for lithium cell charging.
Brief description of the drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
A kind of lithium battery intelligent charging circuit, including Switching Power Supply T1, buck mode DC-DC converter T2, lithium battery T3,
One amplifier U1, the second amplifier U2, Schottky diode D1, light emitting diode D2, inductance L, first to the 6th electric capacity C1 ~ C6, can
Adjust resistance R1, second to the tenth resistance R2 ~ R10, single-chip microcomputer；
Wherein, Switching Power Supply T1 positive pole is connected with buck mode DC-DC converter T2 supply voltage input pin；Switch
Power supply T1 negative pole ground connection；On the one hand buck mode DC-DC converter T2 power switch output pin passes through inductance L and lithium battery
T3 positive pole connection, the voltage sampling signal input S2 on the other hand passing sequentially through inductance L, the 5th resistance R5 and single-chip microcomputer connect
Connect；Buck mode DC-DC converter T2 grounding pin ground connection；Lithium battery T3 negative pole one side and the first amplifier U1 positive input
End connection, is on the other hand passed through by the voltage sampling signal input S2 connections of the 6th resistance R6 and single-chip microcomputer, the third aspect
9th resistance R9 is grounded；On the one hand first amplifier U1 negative input end is connected by the 7th resistance R7 and the first amplifier U1 output end
Connect, be on the other hand grounded by the 8th resistance R8；First amplifier U1 output end respectively with the second amplifier U2 negative input end and
The current sampling signal input S3 connections of single-chip microcomputer；On the one hand second amplifier U2 positive input terminal passes through 3rd resistor R3 and list
The pwm signal output end S1 connections of piece machine, on the other hand it is grounded by the 4th resistance R4；Second amplifier U2 output end is with lighting
Diode D2 anode connection；On the one hand light emitting diode D2 negative electrode connects with buck mode DC-DC converter T2 feedback pin
Connect, on the other hand pass sequentially through the tenth resistance R10, second resistance R2 ground connection；
Schottky diode D1 negative electrode is connected with buck mode DC-DC converter T2 power switch output pin；Xiao Te
Based diode D1 plus earth；An adjustable resistance R1 fixing end is connected with lithium battery T3 positive pole, another fixing end
It is grounded by second resistance R2；Adjustable resistance R1 sliding end is connected with lithium battery T3 positive pole；First electric capacity C1 one end with
Switching Power Supply T1 positive pole connection, other end ground connection；Second electric capacity C2 one end is connected with Switching Power Supply T1 positive pole, the other end
Ground connection；The 3rd electric capacity C3 both ends supply voltage input pin and internal voltage regulator with buck mode DC-DC converter T2 respectively
Shunt location pin connects；4th electric capacity C4 one end is connected with lithium battery T3 positive pole, other end ground connection；5th electric capacity C5's
One end is connected with lithium battery T3 positive pole, other end ground connection；The 6th electric capacity C6 both ends positive input with the second amplifier U2 respectively
End connects with output end.
When it is implemented, the buck mode DC-DC converter T2 is XL4016 buck mode DC-DC converters.Described first
Amplifier U1, the second amplifier U2 are LM358 amplifiers.The single-chip microcomputer is C8051F020 single-chip microcomputers.The 9th resistance R9 is
0.05 Ω precision resisters.
Claims (5)
- A kind of 1. lithium battery intelligent charging circuit, it is characterised in that：Including Switching Power Supply（T1）, buck mode DC-DC converter （T2）, lithium battery（T3）, the first amplifier（U1）, the second amplifier（U2）, Schottky diode（D1）, light emitting diode（D2）, electricity Sense（L）, the first to the 6th electric capacity（C1~C6）, adjustable resistance（R1）, the second to the tenth resistance（R2~R10）, single-chip microcomputer；Wherein, Switching Power Supply（T1）Positive pole and buck mode DC-DC converter（T2）Supply voltage input pin connection；Switch Power supply（T1）Negative pole ground connection；Buck mode DC-DC converter（T2）Power switch output pin on the one hand pass through inductance（L）With Lithium battery（T3）Positive pole connection, on the other hand pass sequentially through inductance（L）, the 5th resistance（R5）Believe with the voltage sample of single-chip microcomputer Number input（S2）Connection；Buck mode DC-DC converter（T2）Grounding pin ground connection；Lithium battery（T3）Negative pole on the one hand with First amplifier（U1）Positive input terminal connection, on the other hand pass through the 6th resistance（R6）Inputted with the voltage sampling signal of single-chip microcomputer End（S2）Connection, the third aspect pass through the 9th resistance（R9）Ground connection；First amplifier（U1）Negative input end on the one hand pass through the 7th Resistance（R7）With the first amplifier（U1）Output end connection, on the other hand pass through the 8th resistance（R8）Ground connection；First amplifier（U1） Output end respectively with the second amplifier（U2）Negative input end and single-chip microcomputer current sampling signal input（S3）Connection；Second Amplifier（U2）Positive input terminal on the one hand pass through 3rd resistor（R3）With the pwm signal output end of single-chip microcomputer（S1）Connection, it is another Aspect passes through the 4th resistance（R4）Ground connection；Second amplifier（U2）Output end and light emitting diode（D2）Anode connection；It is luminous Diode（D2）Negative electrode on the one hand and buck mode DC-DC converter（T2）Feedback pin connection, on the other hand pass sequentially through Tenth resistance（R10）, second resistance（R2）Ground connection；Schottky diode（D1）Negative electrode and buck mode DC-DC converter（T2）Power switch output pin connection；Xiao Te Based diode（D1）Plus earth；Adjustable resistance（R1）A fixing end and lithium battery（T3）Positive pole connection, another Fixing end passes through second resistance（R2）Ground connection；Adjustable resistance（R1）Sliding end and lithium battery（T3）Positive pole connection；First electricity Hold（C1）One end and Switching Power Supply（T1）Positive pole connection, the other end ground connection；Second electric capacity（C2）One end and Switching Power Supply （T1）Positive pole connection, the other end ground connection；3rd electric capacity（C3）Both ends respectively with buck mode DC-DC converter（T2）Power supply Voltage input pin connects with internal voltage regulator shunt location pin；4th electric capacity（C4）One end and lithium battery（T3）Positive pole Connection, other end ground connection；5th electric capacity（C5）One end and lithium battery（T3）Positive pole connection, the other end ground connection；6th electric capacity （C6）Both ends respectively with the second amplifier（U2）Positive input terminal connected with output end.
- A kind of 2. lithium battery intelligent charging circuit according to claim 1, it is characterised in that：The buck DC-DC turns Parallel operation（T2）For XL4016 buck mode DC-DC converters.
- A kind of 3. lithium battery intelligent charging circuit according to claim 1, it is characterised in that：First amplifier（U1）、 Second amplifier（U2）It is LM358 amplifiers.
- A kind of 4. lithium battery intelligent charging circuit according to claim 1, it is characterised in that：The single-chip microcomputer is C8051F020 single-chip microcomputers.
- A kind of 5. lithium battery intelligent charging circuit according to claim 1, it is characterised in that：9th resistance（R9）For 0.05 Ω precision resisters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720500913.9U CN206712509U (en) | 2017-05-08 | 2017-05-08 | A kind of lithium battery intelligent charging circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720500913.9U CN206712509U (en) | 2017-05-08 | 2017-05-08 | A kind of lithium battery intelligent charging circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206712509U true CN206712509U (en) | 2017-12-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720500913.9U Expired - Fee Related CN206712509U (en) | 2017-05-08 | 2017-05-08 | A kind of lithium battery intelligent charging circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN206712509U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108233484A (en) * | 2018-02-08 | 2018-06-29 | 银隆新能源股份有限公司 | Lithium titanate battery module mends electric power sourced electric system |
-
2017
- 2017-05-08 CN CN201720500913.9U patent/CN206712509U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108233484A (en) * | 2018-02-08 | 2018-06-29 | 银隆新能源股份有限公司 | Lithium titanate battery module mends electric power sourced electric system |
| CN108233484B (en) * | 2018-02-08 | 2023-11-10 | 银隆新能源股份有限公司 | Lithium titanate battery module electricity supplementing power supply electric system |
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| 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: 20171205 Termination date: 20200508 |
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| CF01 | Termination of patent right due to non-payment of annual fee |