CN207977757U - A kind of lithium battery charging management circuit - Google Patents
A kind of lithium battery charging management circuit Download PDFInfo
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- CN207977757U CN207977757U CN201820383500.1U CN201820383500U CN207977757U CN 207977757 U CN207977757 U CN 207977757U CN 201820383500 U CN201820383500 U CN 201820383500U CN 207977757 U CN207977757 U CN 207977757U
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- charging
- lithium battery
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The utility model provides a kind of lithium battery charging management circuit, it is related to lithium battery Charge Management technical field, a kind of lithium battery charging management circuit includes charging current setting circuit, charging voltage control circuit and current output circuit, charging current setting circuit includes the first reference voltage, first operational amplifier and non-essential resistance, first operational amplifier is electrically connected with the first reference voltage and non-essential resistance respectively, charging voltage control circuit includes the second reference voltage and the comparator that is electrically connected with the second reference voltage, comparator is electrically connected with the first reference voltage, current output circuit includes second operational amplifier and the metal-oxide-semiconductor that is electrically connected with second operational amplifier.A kind of lithium battery charging management circuit design of the utility model is simple, and charging effect more preferably, improves load compatibility, the equipment that can effectively reduce charging cost, and can be suitably used for all kinds of high low side charge requirements.
Description
Technical field
The utility model is related to lithium battery Charge Management technical field,
Especially, the utility model is related to a kind of lithium battery charging management circuits.
Background technology
With popularizing for lithium battery, the demand to lithium battery Charge Management is also more and more vigorous.Lithium battery charging needs to accord with
Close trickle, constant current, constant pressure three stage charging system specification.I.e. when cell voltage is less than 2.9V, low current trickle charge is carried out；In electricity
Pressure carries out high current constant current quick charge higher than after 2.9V；Reach in voltage, close to 4.2V (different and different depending on battery material)
When, constant-voltage charge is carried out, electric current continuously decreases until being full of.It is safe to ensure to charge with this, while protecting battery.
Traditional charging management chip, battery close to full of when can all enter constant pressure (CV) charging stage, it is ensured that battery
While voltage is not overcharged, more electricity are charged into battery.During constant-voltage charge, under charging current is gradual
Drop, when electric current drops to certain value, usually the 1/10 of constant current (CC) charging current, chip enters after detecting the current value
Full state.
Constant voltage charging phase needs to build a loop, corrects charging output voltage in real time, has loop just to have stability to ask
Topic, in order to enable loop is reliable and stable, chip interior needs a large amount of compensating electric capacities, occupies compared with many areas and cost；Nonetheless,
Still external output loading is required, can not all keeps stable in various load conditions.
Utility model content
The purpose of this utility model is to provide a kind of designs simply, insensitive to external loading without building loop, fills
Electricity is better, can effectively reduce charging cost, and can be suitably used for the lithium battery charging of the equipment of all kinds of high low side charge requirements
Manage circuit.
It is achieved to solve the above problems, the utility model adopts the following technical solution：
A kind of lithium battery charging management circuit, including charging current setting circuit, charging voltage control circuit and electric current are defeated
Going out circuit, the charging current setting circuit includes the first reference voltage, the first operational amplifier and non-essential resistance, and described first
Operational amplifier is electrically connected with first reference voltage and non-essential resistance respectively, and the charging voltage control circuit includes second
Reference voltage and the comparator being electrically connected with second reference voltage, the comparator are electrically connected with first reference voltage
It connects, the current output circuit includes second operational amplifier and the metal-oxide-semiconductor that is electrically connected with the second operational amplifier.
Preferably, the quantity of first reference voltage is at least 1.
Preferably, the charging current setting circuit includes the indication counter for being used to indicate charging current variation, described
Indication counter is electrically connected with the comparator.
Preferably, the counting input end mouth for inputting count value is provided in the indication counter.
Preferably, the quantity of the metal-oxide-semiconductor is at least 1.
Preferably, the metal-oxide-semiconductor includes the first metal-oxide-semiconductor, the second metal-oxide-semiconductor and third metal-oxide-semiconductor, first metal-oxide-semiconductor and institute
The anode for stating the first reference voltage is connected, and second metal-oxide-semiconductor is connected with the anode of the second operational amplifier, the third
Metal-oxide-semiconductor is connected with the cathode of the second operational amplifier.
The utility model in order to help to understand a kind of above-mentioned lithium battery charging management circuit, propose a kind of lithium battery charging
Management method, using a kind of lithium battery charging management circuit, the lithium battery charging management circuit include charging current setting circuit,
Charging voltage control circuit and current output circuit, method include the following steps：
S1：Current output circuit carries out constant-current charge to battery；
S2：Charging voltage control circuit judges whether cell voltage reaches first and thened follow the steps full of threshold value if reaching
S3；Otherwise return to step S1；
S3：Charging current setting circuit carries out current reduction charging to battery；
S4：Charging voltage control circuit judges whether cell voltage reaches second and thened follow the steps full of threshold value if reaching
S5；Otherwise continue to charge with current flow；
S5：Current reduction number is counted, and judges to reduce whether number reaches counting preset value, is filled if reaching
Electricity terminates；Otherwise return to step S3.
Preferably, before executing step S2, setting first is full of threshold value.
Preferably, before executing step S4, setting second is full of threshold value, and described second is full of threshold value not less than described
First is full of threshold value.
Preferably, before executing step S5, setting counts preset value.
Preferably, when executing step S5, counting preset value is bigger, and battery is finer full of process, closer to constant-voltage charge.
A kind of lithium battery charging management circuit advantageous effect of the utility model is：Design is simple, and charging effect more preferably, carries
High load compatibility, the equipment that can effectively reduce charging cost, and can be suitably used for all kinds of high low side charge requirements.
Description of the drawings
Fig. 1 is one circuit diagram of the utility model；
In figure：1, the first reference voltage, the 2, first operational amplifier, 3, non-essential resistance, the 4, second reference voltage, 5, compare
Device, 6, second operational amplifier, 7, metal-oxide-semiconductor, the 71, first metal-oxide-semiconductor, the 72, second metal-oxide-semiconductor, 73, third metal-oxide-semiconductor.
Specific implementation mode
The utility model is described further with reference to the accompanying drawings and examples.
Constant voltage charging phase needs to build a loop in traditional charging management chip, corrects charging output electricity in real time
Pressure, has loop just to have stability problem, in order to enable loop is reliable and stable, chip interior needs a large amount of compensating electric capacities, occupy compared with
Many areas and cost；Nonetheless, still external output loading is required, can not all keeps steady in various load conditions
It is fixed.But conventional constant voltage control needs to complete loop control by operational amplifier and mating compensation circuit, while needing to compare
It completes, full of detection, higher cost both to have been needed in this way, and there are the demands of stabiloity compensation, also to external loading compared with device
It is sensitive.
Embodiment one：As shown in Figure 1, only one of the utility model embodiment, to solve the above problems, this reality
It is achieved with novel adopt the following technical scheme that：A kind of lithium battery charging management circuit, it is characterised in that：Including charging electricity
Initialization circuit, charging voltage control circuit and current output circuit are flowed, the charging current setting circuit includes first with reference to electricity
Press the 1, first operational amplifier 2 and non-essential resistance 3, first operational amplifier 2 is respectively with first reference voltage 1 and outside
Portion's resistance 3 is electrically connected, and the charging voltage control circuit includes the second reference voltage 4 and is electrically connected with second reference voltage 4
The comparator 5 connect, the comparator 5 are electrically connected with first reference voltage 1, and the current output circuit includes the second operation
Amplifier 6 and the metal-oxide-semiconductor 7 being electrically connected with the second operational amplifier 6.
Here emphasis is to use comparator 5 instead of operational amplifier and its mating compensation circuit, while eliminating tradition
It is full of detection comparator in skill.
It should be noted that the quantity of first reference voltage 1 is at least 1, that is, multiple reference voltages composition
Set of reference voltages, as more stablizing with reference to value is more accurate under the mating reaction of the first operational amplifier 1.
Comparator 5 in charging current setting circuit is detected defeated in real time on the basis of the voltage of second reference voltage 4
Go out voltage, once output voltage is higher than setting value (such as 4.2V), comparator 5 provides an indication signal, passes to charging electricity
Initialization circuit is flowed, for changing electric current, since curent change can cause output voltage to change, comparator 5 in charging process
Repeatedly triggering indication signal can be provided, and often triggering is primary, voltage just more approaches the voltage that is full of of setting, thus is known as repeatedly forcing
It is close to be full of control.
The charging current setting circuit includes the indication counter for being used to indicate charging current variation, the indication counter
Device is electrically connected with the comparator 5.This indication counter, which receives comparator 5, can repeatedly trigger the indication signal provided, go forward side by side
Row counts.
Current output circuit receives the indication signal from comparator 5, changes the reference voltage of the first operational amplifier 2,
To change charging current；Also indication signal is counted, after the number of indication signal reaches the number of setting, stops filling
Electricity, into full of standby mode.
So, the counting input end mouth for inputting count value is provided in the indication counter.This counts input
Port is used to input the counting number of setting.
By counting the form of n number, to terminate charging, it is not necessarily to high-precision current detection comparator.Count a several of n
The amount doesn't matter according to specification demands, n is much finer full of process, closer to constant-voltage charge；N is fewer, simpler full of process,
It so can effectively be charged for various high-end or low side equipment, widely applicable, stability is high.
There are one details, the quantity of the metal-oxide-semiconductor 7 is at least 1.
In fact, the metal-oxide-semiconductor 7 should there are three, the metal-oxide-semiconductor 7 includes the first metal-oxide-semiconductor 71, the second metal-oxide-semiconductor 72 and the
Three metal-oxide-semiconductors 73, first metal-oxide-semiconductor 71 are connected with the anode of first reference voltage 1, second metal-oxide-semiconductor 72 and described
The anode of second operational amplifier 6 is connected, and the 3rd MOS73 pipes are connected with the cathode of the second operational amplifier 7.So
It plays good insulating properties and plays fine circuit safety control.
The utility model compares traditional lithium battery charge construction, eliminates an operational amplifier and cost is higher
Mating compensation network；In addition high-precision current comparator is reduced to common voltage comparator.By completely new system architecture,
While meeting battery charging specifications requirement, system cost is reduced, improves load compatibility.
Embodiment two：Only one of the utility model embodiment, in order to further manage the utility model
Solution, the utility model proposes a kind of lithium battery charging management methods, and using a kind of lithium battery charging management circuit, which fills
Fulgurite reason circuit includes charging current setting circuit, charging voltage control circuit and current output circuit, and method includes following step
Suddenly：
S1：Current output circuit carries out constant-current charge to battery；
S2：Charging voltage control circuit judges whether cell voltage reaches first and thened follow the steps full of threshold value if reaching
S3；Otherwise return to step S1；
The first two steps are controlled by charging voltage control circuit, still take constant-current charge, when constant-current charge is completed
Later, next stage is carried out.
S3：Charging current setting circuit carries out current reduction charging to battery；
S4：Charging voltage control circuit judges whether cell voltage reaches second and thened follow the steps full of threshold value if reaching
S5；Otherwise continue to charge with current flow；
S5：Current reduction number is counted, and judges to reduce whether number reaches counting preset value, is filled if reaching
Electricity terminates；Otherwise return to step S3.
Three steps are then to reduce electric current to charge afterwards, mainly have charging current setting circuit to be controlled here, comparator
Detection output voltage in real time, once output voltage is higher than setting value, comparator provides an indication signal, passes to charging current
Initialization circuit, for changing electric current, reduce charging current and then it is secondary charge, comparator can be multiple in charging process
Triggering provides indication signal, and often triggering is primary, and what voltage just more approached setting is full of voltage, is repeatedly approached herein full of control
Lower progress precision charging.
Moreover, before executing step S2, setting first is full of threshold value.Before executing step S4, setting second is full of
Threshold value.
Here, described second is full of threshold value not less than described first full of threshold value.
First can be equal to second full of threshold value is full of threshold value, can also be less than second and be full of threshold value.If first is full of threshold
Value is full of threshold value less than second, then safety when can ensure constant-voltage charge is more secure.
Finally, before executing step S5, setting counts preset value.
It is noted herein that counting, preset value is bigger, and battery is finer full of process, closer to constant-voltage charge.Needle
It charges to the equipment of different charge requirements.
A kind of lithium battery charging management circuit design of the utility model is simple, and charging effect more preferably, improves load compatibility
Property, the equipment that can effectively reduce charging cost, and can be suitably used for all kinds of high low side charge requirements.
The utility model is not limited to above-mentioned specific embodiment, and various modifications and changes may be made to the present invention.
Every foundation the technical essence of the utility model, should all to embodiment of above any modification, equivalent replacement, improvement and so on
Included in the scope of protection of the utility model.
Claims (6)
1. a kind of lithium battery charging management circuit, it is characterised in that：Including charging current setting circuit, charging voltage control circuit
And current output circuit, the charging current setting circuit include the first reference voltage（1）, the first operational amplifier（2）With it is outer
Portion's resistance（3）, first operational amplifier（2）Respectively with first reference voltage（1）And non-essential resistance（3）Electrical connection,
The charging voltage control circuit includes the second reference voltage（4）With with second reference voltage（4）The comparator of electrical connection
（5）, the comparator（5）With first reference voltage（1）Electrical connection, the current output circuit include the second operation amplifier
Device（6）With with the second operational amplifier（6）The metal-oxide-semiconductor of electrical connection（7）.
2. a kind of lithium battery charging management circuit according to claim 1, it is characterised in that：First reference voltage
（1）Quantity be at least 1.
3. a kind of lithium battery charging management circuit according to claim 1, it is characterised in that：The charging current setting electricity
Road includes the indication counter for being used to indicate charging current variation, the indication counter and the comparator（5）Electrical connection.
4. a kind of lithium battery charging management circuit according to claim 3, it is characterised in that：It is set in the indication counter
It is equipped with the counting input end mouth for inputting count value.
5. a kind of lithium battery charging management circuit according to claim 1, it is characterised in that：The metal-oxide-semiconductor（7）Quantity
At least 1.
6. a kind of lithium battery charging management circuit according to claim 5, it is characterised in that：The metal-oxide-semiconductor（7）Including
One metal-oxide-semiconductor（71）, the second metal-oxide-semiconductor（72）With third metal-oxide-semiconductor（73）, first metal-oxide-semiconductor（71）With first reference voltage
（1）Anode be connected, second metal-oxide-semiconductor（72）With the second operational amplifier（6）Anode be connected, the 3rd MOS
Pipe（73）With the second operational amplifier（6）Cathode be connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820383500.1U CN207977757U (en) | 2018-03-21 | 2018-03-21 | A kind of lithium battery charging management circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820383500.1U CN207977757U (en) | 2018-03-21 | 2018-03-21 | A kind of lithium battery charging management circuit |
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| Publication Number | Publication Date |
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| CN207977757U true CN207977757U (en) | 2018-10-16 |
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ID=63766007
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| CN201820383500.1U Active CN207977757U (en) | 2018-03-21 | 2018-03-21 | A kind of lithium battery charging management circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108462230A (en) * | 2018-03-21 | 2018-08-28 | 嘉兴飞童电子科技有限公司 | A kind of lithium battery charging management circuit and management method |
-
2018
- 2018-03-21 CN CN201820383500.1U patent/CN207977757U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108462230A (en) * | 2018-03-21 | 2018-08-28 | 嘉兴飞童电子科技有限公司 | A kind of lithium battery charging management circuit and management method |
| CN108462230B (en) * | 2018-03-21 | 2024-04-19 | 嘉兴飞童电子科技有限公司 | Lithium battery charging management circuit and management method |
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