CN102957177A - Charging management system - Google Patents
Charging management system Download PDFInfo
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- CN102957177A CN102957177A CN 201110247719 CN201110247719A CN102957177A CN 102957177 A CN102957177 A CN 102957177A CN 201110247719 CN201110247719 CN 201110247719 CN 201110247719 A CN201110247719 A CN 201110247719A CN 102957177 A CN102957177 A CN 102957177A
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- effect transistor
- pmos field
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Abstract
The invention discloses a charging management system comprising a switch control module, a voltage conversion module, an acquisition and conversion module, a charging management module and a charging current control module. The switch control module is used for controlling on and off of the charging management system. The voltage conversion module is used for converting an inputted regular direct-current voltage into a value-variable direct-current voltage. The acquisition and conversion module is used for detecting acquisition voltage or current states and converting acquired simulation signals into digital signals. The charging management module is used for receiving digital signals of the acquisition and conversion module and controlling the control module. The charging current control module is used for controlling and adjusting charging current. The switch control module, the voltage conversion module, the acquisition and conversion module, the charging management module and the charging current control module are sequentially electrically connected. The high-efficiency charging management capable of dynamically adjusting voltage and with a current and voltage detecting and protecting function is provided.
Description
Technical field
The present invention relates to a kind of charging management system, particularly relate to a kind of high-efficiency battery charging management system.
Background technology
Along with the raising of technology, the dominant frequency of the hand-held terminal device that people use is more and more higher, screen is increasing, simultaneously the stand-by time of system is also had higher requirement.Therefore, the capacity of the rechargeable battery of handheld device is also correspondingly increasing.How managing battery charging problem then is the difficult problem that the Hardware Engineer runs at present.
Make a general survey of the integrated circuit of all kinds of charging devices in the market, all used field effect transistor in its more common management system.The first problem that these charging devices use metal-oxide-semiconductor field effect transistor to bring is the heating problem of field effect transistor, and its main cause is not make used field effect transistor well be operated in the range of linearity.Second Problem is the low problem of power utilization, and its reason is not handle the assignment problem on circuit element of impressed current and voltage well, so that power consumption is greatly all fallen on metal-oxide-semiconductor field effect transistor.The 3rd problem is not have preferably real-time voltage current detecting and control function, to form overload protection mechanism.
Summary of the invention
The technical problem to be solved in the present invention is that heating problem is serious when overcoming in the prior art charging of the field effect transistor in the charging device, power utilization is low and not have the preferably defective of current/voltage overload protection mechanism, provides a kind of and has electric current, the voltage detecting defencive function can be realized the dynamically efficient charging management system of adjustment of voltage simultaneously.
The present invention solves above-mentioned technical problem by following technical proposals:
The invention provides a kind of charging management system, be characterized in that this charging management system comprises a switch control module, be used for controlling the unlatching of described charging management system or closing; One voltage transformation module, be used for inputting one fixedly direct voltage convert the variable direct voltage of a numerical value to; One Collect conversion module, the analog signal conversion that is used for gathering becomes digital signal; One charge management module is used for receiving the digital signal of Collect conversion module, and controls described switch control module; One charging current control module is for the size of regulating and controlling charging current;
Wherein this switch control module, voltage transformation module, Collect conversion module, charge management module, charging current control module are electrically connected successively.
Preferably, this switch control module is a PMOS field effect transistor, this PMOS field effect transistor has one source pole, drain electrode and a grid, the source electrode of described PMOS field effect transistor is connected with a voltage input end DCIN of an adapter, the drain electrode of described PMOS field effect transistor is connected with an input of a DC-DC DC-to-DC converter of described voltage transformation module, and the grid of described PMOS field effect transistor is connected with a control end of described charge management module.
Preferably, this voltage transformation module comprises a DC-DC DC-to-DC converter, an inductance and a resistance, wherein this DC-DC DC-to-DC converter, inductance and resistance are electrically connected successively, and the input VSYS that described resistance and one is powered system is connected.
Preferably, this charging current control module comprises a PMOS field effect transistor and a voltage-stabiliser tube, this PMOS field effect transistor has one source pole, one drain electrode and a grid, the input VSYS that the source electrode of described PMOS field effect transistor and is powered system is connected, the drain electrode of described PMOS field effect transistor is connected with a rechargeable battery, the grid of described PMOS field effect transistor is connected with a control end of described charge management module, the input of described voltage-stabiliser tube links to each other with the drain electrode of described PMOS field effect transistor, and the input VSYS that the output of described voltage-stabiliser tube and is powered system is connected.
Preferably, this Collect conversion module is an ADC analog to digital converter, the first input end of this ADC analog to digital converter is connected in a drain electrode of a PMOS field effect transistor of described switch control module, the second input of this analog to digital converter is connected between the inductance and a resistance of described voltage transformation module, the 3rd input of this analog to digital converter is connected in an input VSYS who is powered system, and the four-input terminal of this analog to digital converter is connected in a drain electrode of described charging current control module one PMOS field effect transistor.
Preferably, this charge management module is the miniature control unit of a MCU, one input of the miniature control unit of described MCU connects an output of described Collect conversion module, one output of the miniature control unit of described MCU is connected in a grid of a PMOS field effect transistor of described switch control module, and another output of the miniature control unit of described MCU is connected in a grid of a PMOS field effect transistor of described charging current control module.
Positive progressive effect of the present invention is:
The present invention is by adopting jointly managing of DC-DC DC-to-DC converter, metal-oxide-semiconductor field effect transistor, ADC analog to digital converter and MCU, provides a kind of and has electric current, the voltage detecting defencive function can be realized the efficient charging management system that voltage is dynamically adjusted simultaneously.Therefore it is excessive and battery that cause damages and lost efficacy to have reduced current/voltage, has improved the charge efficiency of battery and has prolonged useful life of rechargeable battery.
Description of drawings
Fig. 1 is the circuit diagram of the preferred embodiment of charging management system of the present invention.
Fig. 2 is the flow chart of the preferred embodiment of charging management system of the present invention.
Embodiment
Provide preferred embodiment of the present invention below in conjunction with accompanying drawing, to describe technical scheme of the present invention in detail.
Charging management system as shown in Figure 1 comprising a switch control module 101 that is electrically connected successively, is used for controlling the unlatching of described charging management system or closing; One voltage transformation module 102, be used for inputting one fixedly direct voltage convert the variable direct voltage of a numerical value to; One Collect conversion module 103 for detection of the voltage that gathers charging circuit or the state of electric current, and becomes digital signal with the analog signal conversion that gathers; One charge management module 104 is used for receiving the digital signal of Collect conversion module, and controls described switch control module; One charging current control module 105 is for the size of regulating and controlling charging current.
The specific descriptions of this switch control module 101 in the present embodiment, voltage transformation module 102, Collect conversion module 103, charge management module 104, charging current control module 105 are as follows:
This switch control module 101 is a PMOS field effect transistor Q1, this PMOS field effect transistor has one source pole, drain electrode and a grid, the source electrode of described PMOS field effect transistor is connected with a voltage input end DCIN of an adapter, the drain electrode of described PMOS field effect transistor is connected with an input of a DC-DC DC-to-DC converter 1021 of described voltage transformation module 102, and the grid of described PMOS field effect transistor Q1 is connected with a control end of described charge management module 104.
This voltage transformation module 102 comprises a DC-DC DC-to-DC converter 1021, an inductance 1022 and a resistance 1023, and wherein said element is electrically connected successively, and the input VSYS that described resistance 1023 and one is powered system is connected.
This charging current control module 105 comprises a PMOS field effect transistor 1051 and a voltage-stabiliser tube VD1052, this PMOS field effect transistor 1051 has one source pole, one drain electrode and a grid, the input VSYS that the source electrode of described PMOS field effect transistor 1051 and is powered system is connected, the drain electrode of described PMOS field effect transistor 1051 is connected with an end of a rechargeable battery, the grid of described PMOS field effect transistor 1051 is connected with a control end of described charge management module 104, the input of described voltage-stabiliser tube 1052 links to each other with the drain electrode of described PMOS field effect transistor 1051, and the input VSYS that the output of described voltage-stabiliser tube 1052 and is powered system is connected.
This Collect conversion module 103 is an ADC analog to digital converter, the first input end of this analog to digital converter is connected in a drain electrode of a PMOS field effect transistor of described switch control module 101, the second input of this analog to digital converter is connected between the inductance 1022 and a resistance 1023 of described voltage transformation module 102, the 3rd input of this analog to digital converter is connected in an input VSYS who is powered system, and the four-input terminal of this analog to digital converter is connected in a drain electrode of described charging current control module 105 1 PMOS field effect transistor 1051.
This charge management module 104 is the miniature control unit of a MCU, one input of described charge management module 104 connects an output of described Collect conversion module 103, one output of described charge management module 104 is connected in a grid of a PMOS field effect transistor of described switch control module 101, and another output of described charge management module is connected in a grid of a PMOS field effect transistor 1051 of described charging current control module 105.
The operation principle of the charging management system in the present embodiment is as follows:
The PMOS field effect transistor Q1 of this switch control module 101 mainly is be used to the unlatching of controlling described charging management system or closes the function that has simultaneously over-voltage over-current protection; when the DCIN input voltage is too high; can control to close PMOS field effect transistor Q1 by the miniature control unit of described MCU of charge management module 104, so that the protection rear end equipment.Q1 is operated on off state.This PMOS field effect transistor Q1 does not have in a lot of systems, and this charging management system increases the chargeable protection power source of this part system.
The described DC-DC DC-to-DC converter 1021 of this voltage transformation module 102 is used for realization to the conversion of direct voltage.This voltage transformation module 102 uses DC-DC that several advantages are arranged: (1) for the charging system of large electric current, DC-DC DC-to-DC converter 1021 can provide larger electric current, therefore can improve power-efficient; (2) the wide DCIN input voltage of DC-DC DC-to-DC converter 1021 energy Compatibilities, the output voltage values capable of dynamic is adjusted simultaneously, therefore can reduce the power loss of the described PMOS field effect transistor 1051 of described charging current control module 105.This be because the power loss of PMOS field effect transistor 1051 by equation P
Mos=(V
Out-V
Bat) I
InputDetermine.After charging is stable, charging current I
InputRemain unchanged.The control of the power loss of PMOS field effect transistor 1051 can be by regulating
Realize.For example, charge when beginning because cell voltage V
BatLower, capable of dynamic is adjusted the voltage that DC-DC DC-to-DC converter 1021 makes the low scope of its output, thereby the pressure reduction at Q2 two ends is reduced, and power consumption is corresponding to be reduced.Along with the carrying out of charging, the voltage of battery increases gradually, and the output voltage of DC-DC DC-to-DC converter 1021 also should increase accordingly, so that charging is efficiently successfully finished.
Described resistance 1023 two ends use two terminal ADC2, the ADC3 of digital to analog converter ADC accurately to detect the output current of DC-DC DC-to-DC converter 1021 and the current analog signal that detects is changed into digital signal, and the internal feedback mechanism of the miniature control unit of MCU by described charge management module 104 is adjusted DC-DC DC-to-DC converter 1021 or carried out overcurrent protection by the described PMOS field effect transistor Q1 powered-down electric power system of switch control module 101.
The effect of the PMOS field effect transistor 1051 of described charging current control module 105 is discharging and recharging of control battery, controls charging current by the gate turn-on degree of adjusting this PMOS field effect transistor Q2.
The miniature control unit of the MCU of charge management module 104 is also adjusted DC-DC DC-to-DC converter 1021 by control and is introduced output voltage V SYS voltage dynamic adjustment mechanism in the gate turn-on degree of control PMOS field effect transistor Q2 herein, thereby when having reduced the power loss of PMOS field effect transistor Q2.In addition, in order to solve because the instantaneous disconnection of DCIN causes steadily switching problem of power supply, hereby in system, add a voltage stabilizing didoe D1.Certainly the PMOS field effect transistor Q2 of charging current control module 105 also can realize with the DC-DC DC-to-DC converter, but this is so that cost is higher and be difficult in chip integrated.
Fig. 2 is the flow chart of the preferred embodiment of charging management system of the present invention.
After step 201 was carried out, program brought into operation.
Whether step 203 Collect conversion module will detect input voltage by the ADC1 end too high; if then the PMOS field effect transistor Q1 of execution in step 204 switch control modules will close; in order to back-end circuit is carried out overvoltage protection; with execution in step 205, the voltage that DC-DC DC-to-DC converter work output is set is held to VSYS if not.
Although more than described the specific embodiment of the present invention, it will be understood by those of skill in the art that these only illustrate, protection scope of the present invention is limited by appended claims.Those skilled in the art can make various changes or modifications to these execution modes under the prerequisite that does not deviate from principle of the present invention and essence, but these changes and modification all fall into protection scope of the present invention.
Claims (6)
1. a charging management system is characterized in that, this charging management system comprises:
One switch control module is used for controlling the unlatching of described charging management system or closing;
One voltage transformation module, be used for inputting one fixedly direct voltage convert the variable direct voltage of a numerical value to;
One Collect conversion module, the analog signal conversion that is used for gathering becomes digital signal;
One charge management module is used for receiving the digital signal of Collect conversion module, and controls described switch control module;
One charging current control module is for the size of regulating and controlling charging current;
Wherein this switch control module, voltage transformation module, Collect conversion module, charge management module, charging current control module are electrically connected successively.
2. charging management system as claimed in claim 1, it is characterized in that, described switch control module is a PMOS field effect transistor, this PMOS field effect transistor has one source pole, drain electrode and a grid, the source electrode of described PMOS field effect transistor is connected with a voltage input end DCIN of an adapter, the drain electrode of described PMOS field effect transistor is connected with an input of a DC-DC DC-to-DC converter of described voltage transformation module, and the grid of described PMOS field effect transistor is connected with a control end of described charge management module.
3. charging management system as claimed in claim 1, it is characterized in that, described voltage transformation module comprises a DC-DC DC-to-DC converter, an inductance and a resistance, wherein this DC-DC DC-to-DC converter, inductance and resistance are electrically connected successively, and the input VSYS that described resistance and one is powered system is connected.
4. charging management system as claimed in claim 1, it is characterized in that, described charging current control module comprises a PMOS field effect transistor and a voltage-stabiliser tube, this PMOS field effect transistor has one source pole, one drain electrode and a grid, the input VSYS that the source electrode of described PMOS field effect transistor and is powered system is connected, the drain electrode of described PMOS field effect transistor is connected with a rechargeable battery, the grid of described PMOS field effect transistor is connected with a control end of described charge management module, the input of described voltage-stabiliser tube links to each other with the drain electrode of described PMOS field effect transistor, and the input VSYS that the output of described voltage-stabiliser tube and is powered system is connected.
5. charging management system as claimed in claim 1, it is characterized in that, described Collect conversion module is an ADC analog to digital converter, the first input end of this ADC analog to digital converter is connected in a drain electrode of a PMOS field effect transistor of described switch control module, the second input of this analog to digital converter is connected between the inductance and a resistance of described voltage transformation module, the 3rd input of this analog to digital converter is connected in an input VSYS who is powered system, and the four-input terminal of this analog to digital converter is connected in a drain electrode of described charging current control module one PMOS field effect transistor.
6. charging management system as claimed in claim 1, it is characterized in that, described charge management module is the miniature control unit of a MCU, one input of the miniature control unit of described MCU connects an output of described Collect conversion module, one output of the miniature control unit of described MCU is connected in a grid of a PMOS field effect transistor of described switch control module, and another output of the miniature control unit of described MCU is connected in a grid of a PMOS field effect transistor of described charging current control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110247719 CN102957177A (en) | 2011-08-24 | 2011-08-24 | Charging management system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110247719 CN102957177A (en) | 2011-08-24 | 2011-08-24 | Charging management system |
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| Publication Number | Publication Date |
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| CN102957177A true CN102957177A (en) | 2013-03-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110247719 Pending CN102957177A (en) | 2011-08-24 | 2011-08-24 | Charging management system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103457323A (en) * | 2013-09-02 | 2013-12-18 | 四川川奇机电有限责任公司 | Charging circuit and charger with same |
| CN104810040A (en) * | 2015-03-30 | 2015-07-29 | 丰岛电子科技(苏州)有限公司 | Mobile storing device and charge method |
| CN104810039A (en) * | 2015-03-30 | 2015-07-29 | 丰岛电子科技(苏州)有限公司 | Mobile storing device and access control method thereof |
| CN105676934A (en) * | 2016-04-13 | 2016-06-15 | 深圳市赛音电子有限公司 | Power circuit |
| CN110212636A (en) * | 2018-12-28 | 2019-09-06 | 深圳传音通讯有限公司 | Apparatus for adjusting power supply, intelligent terminal and power supply method of adjustment |
-
2011
- 2011-08-24 CN CN 201110247719 patent/CN102957177A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103457323A (en) * | 2013-09-02 | 2013-12-18 | 四川川奇机电有限责任公司 | Charging circuit and charger with same |
| CN103457323B (en) * | 2013-09-02 | 2015-09-16 | 四川川奇机电有限责任公司 | Charging circuit and the charger with this charging circuit |
| CN104810040A (en) * | 2015-03-30 | 2015-07-29 | 丰岛电子科技(苏州)有限公司 | Mobile storing device and charge method |
| CN104810039A (en) * | 2015-03-30 | 2015-07-29 | 丰岛电子科技(苏州)有限公司 | Mobile storing device and access control method thereof |
| CN105676934A (en) * | 2016-04-13 | 2016-06-15 | 深圳市赛音电子有限公司 | Power circuit |
| CN105676934B (en) * | 2016-04-13 | 2017-12-22 | 深圳市赛音电子有限公司 | A kind of power circuit |
| CN110212636A (en) * | 2018-12-28 | 2019-09-06 | 深圳传音通讯有限公司 | Apparatus for adjusting power supply, intelligent terminal and power supply method of adjustment |
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Application publication date: 20130306 |