CN205901342U - Charging circuit and electronic equipment of battery - Google Patents
Charging circuit and electronic equipment of battery Download PDFInfo
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- CN205901342U CN205901342U CN201620606091.8U CN201620606091U CN205901342U CN 205901342 U CN205901342 U CN 205901342U CN 201620606091 U CN201620606091 U CN 201620606091U CN 205901342 U CN205901342 U CN 205901342U
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
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Abstract
The utility model discloses a charging circuit of battery, include: power management chip and the voltage detection chip who is connected with power management chip, voltage detection chip is for power management chip independent setting, and is used for detecting the voltage of battery to voltage feedback to power management chip with the battery, power management chip is used for receiving the voltage of battery to carry out the comparison with the voltage of battery with predetermined voltage, in order to adjust the charge mode of external power source to the battery. The utility model discloses still disclose an electronic equipment. In this way, the utility model discloses the voltage detection chip who utilizes independent setting comes the voltage of direct detection battery, line impedance problem when having avoided utilizing power management chip detection voltage for the voltage that detects is more accurate, and the charge time of constant current charging mode prolongs relatively, thereby improves charge efficiency, shortens the charge time of battery.
Description
Technical field
This utility model is related to electronic technology field, more particularly to a kind of charging circuit of battery and electronic equipment.
Background technology
The charging modes of mobile phone adopt the charging modes of constant voltage after first constant current mostly, adopt constant current when just starting to charge up
Charge mode, this stage charging current keeps constant, and the voltage of battery gradually rises, when the voltage of battery reaches charging upper limit
Constant-voltage charge pattern is adopted again, this stage voltage is constant, and electric current is gradually reduced, and subtracts in the final stage electric current charging after voltage
During little minimum current to system setting, then stop charging.Pass through the power management chip (power in mobile phone in charging process
Management ic, pmic) voltage of battery is monitored, after the voltage of battery reaches charging upper limit voltage, control is filled
Electricity switchs to constant-voltage charge pattern by constant current charging mode.
As shown in figure 1, power management chip passes through cell phone lines and battery bag circuit is connected with battery.Due to mobile phone line
The presence of the anti-r1 of roadlock, battery bag line impedance r2 and field effect transistor impedance r3, has pressure drop in these places and exists, because
This, the voltage that in charging process, pmic detects is the voltage sum at virtual voltage and the above-mentioned impedance of battery, that is, detect electricity
Pressure > virtual voltage, control battery that thus can be too early entering constant-voltage charge pattern, thus reducing the constant-current charge time, prolonging
Grow constant voltage charging time, and because the electric current of constant-voltage charge is less than the electric current of constant-current charge, therefore battery total charging interval
Elongated.
Utility model content
This utility model, mainly solving the technical problems that providing a kind of charging circuit of battery and electronic equipment, can solve
The voltage that certainly power management chip detects is higher and lead to the elongated problem of battery charge time.
For solving above-mentioned technical problem, the technical scheme that this utility model adopts is: provides a kind of charging of battery
Circuit, comprising:
Power management chip and the voltage checking chip being connected with power management chip；
Voltage checking chip is independently arranged with respect to power management chip, and for detecting the voltage of battery, and by battery
Voltage Feedback to power management chip；
Power management chip is used for receiving the voltage of battery, and the voltage of battery is compared with default voltage, with
Adjust the charge mode to battery for the external power source.
Wherein, power management chip and voltage checking chip connect battery respectively, wherein voltage checking chip and battery it
Between the impedance of connection line be less than the impedance of connection line between power management chip and battery.
Wherein, the test side of voltage checking chip and the two ends of battery are directly connected to.
Wherein, voltage checking chip and battery are integrated in same battery bag, and battery bag includes battery, voltage checking chip
And protection circuit.
Wherein, default voltage is charging upper limit voltage, when the voltage of battery is more than or equal to charging upper limit voltage, electricity
Source control chip adjusts external power source and enters constant-voltage charge pattern to the charge mode of battery by constant current charging mode.
Wherein, charging upper limit voltage is 4.2v, 4.3v or 4.4v.
Wherein, power management chip includes charging current adjustment module and control module；
One end of charging current adjustment module connects external power source, and the other end of charging current adjustment module connects control mould
Block, in order to receive the control signal of control module, and adjusts the charge mode to battery for the external power source according to control signal；
The other end of control module is connected with voltage checking chip, with the electricity of the battery of receiving voltage detection chip feedback
Pressure, and the voltage of battery and default voltage are compared to output control signals to charging current adjustment module.
For solving above-mentioned technical problem, another technical scheme that this utility model adopts is: a kind of electronic equipment is provided,
Charging circuit including above-mentioned battery.
The beneficial effects of the utility model are: be different from the situation of prior art, this utility model passes through voltage detecting core
Piece detects the voltage of battery, and by the Voltage Feedback of battery to power management chip, receives battery using power management chip
Voltage, and the voltage of battery is compared with default voltage, to adjust the charge mode to battery for the external power source, wherein,
Voltage checking chip is independently arranged with respect to power management chip.In this way, using the voltage detecting core being independently arranged
Piece carrys out the voltage of direct detection battery, avoids using line impedance problems during power management chip detection voltage so that examining
The voltage of the battery measuring is more accurate, and the charging interval of constant current charging mode extends relatively, thus improving charge efficiency, shortens
The charging interval of battery.
Brief description
Fig. 1 is the principle schematic of the charging circuit of battery in prior art；
Fig. 2 is the principle schematic of the charging circuit first embodiment of this utility model battery；
Fig. 3 be this utility model battery charging circuit first embodiment in battery charge current/voltage and the time
Relation schematic diagram；
Fig. 4 is the principle schematic of the charging circuit second embodiment of this utility model battery.
Specific embodiment
For making those skilled in the art more fully understand the technical solution of the utility model, below in conjunction with the accompanying drawings and specifically
Embodiment is elaborated further to a kind of charging circuit of battery provided by the utility model and electronic equipment.
Refer to Fig. 2, the charging circuit first embodiment of this utility model battery, including power management chip 11 and with
The voltage checking chip 12 that power management chip 11 connects.
Power management chip 11 is to shoulder the conversion to electric energy, distribution, detection and other electricity in electronic apparatus system
Can management responsibility chip, have the module of detection voltage in power management chip 11, prior art is using external power source vcc pair
During battery bat is charged, power management chip 11 detects to the voltage at battery bat two ends, when electricity is detected
After the voltage of pond bat reaches charging upper limit voltage, control external power source vcc to the charge mode of battery bat by constant-current charge mould
Formula is switched to constant-voltage charge pattern；
In this course, there is line impedance due on power management chip 11 to the connection line of battery bat, some
It is also associated with other circuit structures, such as current detection circuit etc. between power management chip 11 and battery bat, and battery bat
Periphery is generally also associated with overcharging, crosses and put and short-circuit protection circuit (not shown), there is also circuit in these circuit structures
Impedance or field effect transistor impedance etc., the equivalent impedance existing between these power management chips 11 to battery bat is institute in Fig. 2
The substitutional connection impedance r4 showing, when external power source vcc is charged to battery bat via power management chip 11, electric current is waiting
With the presence of pressure drop so that the voltage of battery bat that power management chip 11 detects is greater than battery bat in effect line impedance r4
Virtual voltage.
Therefore, in present embodiment, outside power management chip 11, it is independently arranged a voltage checking chip 12, voltage detecting
The test side 1/2 of chip 12 can direct or indirect connection at the two ends of battery bat, the outfan 3 of voltage checking chip 12 and electricity
Source control chip 11 connects；
The impedance r5 of the connection line between voltage checking chip 12 and battery bat is less than power management chip 11 and battery
Substitutional connection impedance r4 between bat, also voltage checking chip 12 arrives electricity to the impedance r5 of connection line described here
A series of substitutional connection impedance r5 of circuit structures at pond bat two ends；
The reality being the voltage on substitutional connection impedance r5 and battery bat using the voltage that voltage checking chip 12 detects
Voltage sum is it can be seen that in the case that charging current bat is consistent, because substitutional connection impedance diminishes, equivalent accordingly
Voltage in line impedance also diminishes, and the voltage that voltage checking chip 12 detects is more nearly the virtual voltage of battery bat, makes
The result obtaining voltage detecting is more accurate.
Fig. 3 is the relation schematic diagram of voltage, electric current and time when external power source vcc charges to battery bat, to battery bat
Charging process be divided into three phases, the first stage is precharge mode, i.e. the 0-t1 time period, initial/unloaded as battery bat
When voltage is less than pre-charge threshold, first have to through this stage, for single battery bat, this threshold value is generally 3v,
In this stage, pre-charge current is about the 10% about of constant-current charging phase electric current；
Second stage is constant current charging mode, i.e. the t1-t2 time period, and this stage is with maximum charging current to battery bat
Carry out constant current charge, battery bat charges the soonest, efficiency highest, and this stage is longer, and the charge efficiency of battery bat is higher, but
It is during battery bat being charged using maximum charging current, the voltage of battery bat gradually rises, electric when reaching
The maximum voltage that pond bat can bear, that is, during charging upper limit voltage, charging upper limit voltage is generally by the battery bat property of itself
Determining, be typically set to 4.2v, 4.3v or 4.4v, need to reduce charging current, otherwise battery bat being caused to damage, thus entering
Enter the phase III；
Phase III is constant-voltage charge pattern, i.e. the t2-t3 time period, and the voltage in this stage keeps constant, and electric current is gradually
Reduce, charge efficiency step-down, stop when electric current drops to certain threshold value charging, the threshold value that electric current stops charging typically may be configured as
100ma or 150ma.
Wherein, each stage that said external power supply vcc charges to battery bat is to be controlled by power management chip 11,
The Voltage Feedback detecting to power management chip 11, power management chip 11 are adjusted external power source by voltage checking chip 12
The charging current to battery bat for the vcc, thus complete the conversion of each stage model.
Power management chip 11 controls external power source vcc to be switched to the condition of constant-voltage charge pattern from constant current charging mode
It is that the voltage of the battery bat detecting is more than or equal to charging upper limit voltage, namely the corresponding magnitude of voltage of t2 in Fig. 3.Therefore to
The time extending constant current charging mode is it is necessary to make the more late charging upper limit voltage that reaches of the voltage of the battery bat detecting better, sharp
Be more nearly battery bat virtual voltage with the voltage detecting that the circuit shown in Fig. 2 obtains so that reach charging upper limit voltage when
Between extend, that is, the time t2 of constant current charging mode is elongated, and charge efficiency uprises, and the time t3 completing to charge shortens.
Refer to Fig. 4, the charging circuit second embodiment of this utility model battery, including voltage checking chip 231, electricity
Source control chip 22, external power source vcc2, battery bat2, protection circuit 233, wherein power management chip 22 include charging current
Adjustment module 221 and control module 222, the annexation between each circuit, module and chip is as shown in figure 4, this company need to be known
The relation that connects is only that schematically connection each other can be directly connected to, or is realized indirectly by some interfaces etc.
Coupling, the division between each module also can have other modes, is defined by actual demand.
In present embodiment, the test side 1/2 of voltage checking chip 231 is connected directly between the two ends of battery bat2, battery
Bat2 periphery is also associated with protection circuit 233, and protection circuit 233 is realized overcharging, crossed and put and short-circuit protection function, voltage detecting core
Piece 231, battery bat2 and protection circuit 233 are integrated in same battery bag 23, and battery bat2 described here refers to battery core,
Using the voltage at voltage checking chip 231 direct detection battery core two ends, the impedance of outside line very little it might even be possible to ignore not
Meter, the virtual voltage of the magnitude of voltage detecting closely battery bat2.
External power source vcc2 connects charging current adjustment module 221 by the charging inlet of electronic equipment, and charging current is adjusted
Section module 221 is used for adjusting the charging current to battery bat2 for the external power source vcc2, and then switches corresponding charge mode.
Referring again to Fig. 3, the work process of whole circuit is:
When battery bat2 carries out initial charge, the voltage of present battery bat2 is detected by voltage checking chip 231,
The Voltage Feedback detecting to control module 222, control module 222 are carried out by voltage checking chip 231 to the voltage detecting
Analysis, if the voltage of battery bat2 is less than the voltage threshold of precharge mode, such as 3v, control module 222 sends control letter
Number to charging current adjustment module 221, charging current adjustment module 221 adjusts external power source vcc2 and the charging of battery bat2 is entered
Enter precharge mode, if the voltage of certain present battery bat2 is more than or equal to the voltage threshold of precharge mode, Ke Yizhi
Connect and skip precharge mode entrance next stage；
It should be noted that in other embodiments, the voltage detecting of precharge mode can be to utilize power management
The voltage of the battery bat2 that chip 22 detects, for the voltage that comparison with voltage detection chip 231 detects, power management chip
22 voltages detecting are higher, precharge mode can be made to terminate in advance, quickly enter in constant current charging mode.But due to
The charging current of precharge mode is less, the electricity detected using power management chip 22 or using voltage checking chip 231
Pressure value difference is not very big, and the raising to charge efficiency is limited, therefore to detect pre- even with voltage checking chip 231
The voltage of the battery bat2 of charge mode, generally speaking remains and improves charge efficiency well.
When the voltage that voltage checking chip 231 detects battery bat2 is equal to or more than the voltage threshold of precharge mode
When, control module 222 sends control signal, makes charging current adjustment module 221 adjust external power source vcc2 and enters constant-current charge
Pattern, the current constant in this stage, voltage persistently rises, the voltage of voltage checking chip 231 monitor in real time battery bat2,
And by Voltage Feedback to control module 222, have the charging upper limit voltage prestoring, such as 4.3v in control module 222, work as inspection
When the voltage of the battery bat2 measuring is more than or equal to charging upper limit voltage, control module 222 sends control signal to the electricity that charges
Stream adjustment module 221, adjusts the charging current to battery bat2 for the external power source vcc2, enters next constant-voltage charge pattern；
During constant-voltage charge pattern, voltages keep constant, electric current is gradually reduced, and charging current adjustment module 221 detects fills
Electric current drops to and stops during certain threshold value, such as 100ma charging.
Using the voltage checking chip 231 monitor in real time battery bat2 independent of power management chip 22 in present embodiment
Voltage, the voltage of battery bat2 is close to the actual voltage of battery core so that the electricity of battery bat2 that receives of control module 222
Pressure is more accurate, compared to existing technology in the magnitude of voltage that detected using power management chip 22 less than normal, in constant current charging mode
The time reaching charging upper limit voltage is elongated, and charge efficiency improves, and the charging interval of battery bat2 shortens.
It should be noted that the numeral mentioned in above two embodiment is used for the purpose of citing, do not do any limit
Fixed.
The charging circuit of the battery of above two embodiment, not only can achieve the function that battery is charged, also can apply
In the overdischarge early warning circuit of battery, in the external early warning circuit of power management chip, it is in off-mode in electronic equipment
When, voltage checking chip detects the voltage of battery, and by the Voltage Feedback of battery to power management chip, power management chip will
The voltage of the battery receiving and default early warning voltage are compared, when the voltage of battery is equal to or less than default early warning electricity
During pressure, power management chip controls early warning circuit to send early warning signal, notifies user in time battery to be charged.
Wherein, voltage checking chip directly can be powered it is also possible to be powered by power management chip by battery.Early warning
Voltage is usually arranged as the default voltage making during electronic equipment automatic shutdown less than in system, and the protection circuit more than battery
Open mistake during Cross prevention and put blanking voltage.
In this way, after electronic equipment shutdown, the voltage of battery is monitored and provides early warning information, permissible
User is reminded to charge in time, it is to avoid battery is crossed and put the injury causing.
This utility model electronic equipment one embodiment, electronic equipment can be mobile phone, panel computer, notebook computer,
Intelligent wearable device or electronic toy etc., these electronic equipments include filling of any battery mentioned in above-mentioned embodiment
Circuit.
The foregoing is only embodiment of the present utility model, not thereby limit the scope of the claims of the present utility model, all
It is the equivalent structure or equivalent flow conversion made using this utility model description and accompanying drawing content, or direct or indirect utilization
In other related technical fields, all include in the same manner in scope of patent protection of the present utility model.
Claims (8)
1. a kind of charging circuit of battery is it is characterised in that include:
Power management chip and the voltage checking chip being connected with described power management chip；
Described voltage checking chip is independently arranged with respect to described power management chip, and for detecting the voltage of described battery,
And by the Voltage Feedback of described battery to described power management chip；
Described power management chip is used for receiving the voltage of described battery, and the voltage of described battery is carried out with default voltage
Relatively, to adjust the charge mode to described battery for the external power source.
2. battery according to claim 1 charging circuit it is characterised in that
Described power management chip and described voltage checking chip connect described battery respectively, wherein said voltage checking chip with
The impedance of the connection line between described battery is less than the resistance of the connection line between described power management chip and described battery
Anti-.
3. battery according to claim 2 charging circuit it is characterised in that
The test side of described voltage checking chip is directly connected to the two ends of described battery.
4. battery according to claim 2 charging circuit it is characterised in that
Described voltage checking chip and described battery are integrated in same battery bag, and described battery bag includes described battery, described
Voltage checking chip and protection circuit.
5. battery according to claim 1 charging circuit it is characterised in that
Described default voltage is charging upper limit voltage, when the voltage of described battery is more than or equal to described charging upper limit voltage
When, described power management chip adjusts described external power source and enters constant voltage to the charge mode of described battery by constant current charging mode
Charge mode.
6. battery according to claim 5 charging circuit it is characterised in that
Described charging upper limit voltage is 4.2v, 4.3v or 4.4v.
7. battery according to claim 1 charging circuit it is characterised in that
Described power management chip includes charging current adjustment module and control module；
One end of described charging current adjustment module connects described external power source, and the other end of described charging current adjustment module is even
Connect described control module, in order to receive the control signal of described control module, and described outside is adjusted according to described control signal
The charge mode to described battery for the power supply；
The other end of described control module is connected with described voltage checking chip, to receive the institute of described voltage checking chip feedback
State the voltage of battery, and the voltage of described battery and default voltage are compared are filled to described with exporting described control signal
Electric current regulating module.
8. a kind of electronic equipment, including the charging circuit of the arbitrary described battery of such as claim 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620606091.8U CN205901342U (en) | 2016-06-20 | 2016-06-20 | Charging circuit and electronic equipment of battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620606091.8U CN205901342U (en) | 2016-06-20 | 2016-06-20 | Charging circuit and electronic equipment of battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205901342U true CN205901342U (en) | 2017-01-18 |
Family
ID=57768166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620606091.8U Active CN205901342U (en) | 2016-06-20 | 2016-06-20 | Charging circuit and electronic equipment of battery |
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| Country | Link |
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| CN (1) | CN205901342U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105939040A (en) * | 2016-06-20 | 2016-09-14 | 深圳天珑无线科技有限公司 | Battery charging circuit, battery charging method and electronic equipment |
| WO2019062787A1 (en) * | 2017-09-30 | 2019-04-04 | 华为技术有限公司 | Control method, related device and computer storage medium for charging |
-
2016
- 2016-06-20 CN CN201620606091.8U patent/CN205901342U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105939040A (en) * | 2016-06-20 | 2016-09-14 | 深圳天珑无线科技有限公司 | Battery charging circuit, battery charging method and electronic equipment |
| WO2019062787A1 (en) * | 2017-09-30 | 2019-04-04 | 华为技术有限公司 | Control method, related device and computer storage medium for charging |
| US11411423B2 (en) | 2017-09-30 | 2022-08-09 | Honor Device Co., Ltd. | Charging control method, related device, and computer storage medium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180530 Address after: 644000 Lingang Economic and Technological Development Zone, Yibin, Sichuan, No. 713, section 17, 17 section of Changjiang North Road, Lingnan economic and Technological Development Zone. Patentee after: Sichuan sac Communication Technology Co., Ltd. Address before: 518053 H3 501B, east industrial area of overseas Chinese town, Nanshan District, Shenzhen, Guangdong Patentee before: Shenzhen Tinno Wireless Technology Co., Ltd. |
|
| TR01 | Transfer of patent right |