CN104467103A - Charge control method for rechargeable battery - Google Patents
Charge control method for rechargeable battery Download PDFInfo
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- CN104467103A CN104467103A CN201410791881.3A CN201410791881A CN104467103A CN 104467103 A CN104467103 A CN 104467103A CN 201410791881 A CN201410791881 A CN 201410791881A CN 104467103 A CN104467103 A CN 104467103A
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- Prior art keywords
- battery
- voltage
- charge
- rechargeable battery
- constant current
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000005070 sampling Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
Classifications
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- H02J7/0072—
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention provides a charge control method for a rechargeable battery. When the initial voltage of the rechargeable battery ranges from 2.0 V to 3.0 V, the method includes the steps of charging the battery with a constant current of 0.7 C till the voltage of the battery reaches 3.0 V, charging the battery with a constant current of 2.0 C till the voltage of the battery reaches 4.05 V, charging the battery with a constant voltage of 4.05 V, charging the battery with a constant current of 1.0 C till the voltage of the battery reaches 4.2 V, charging the battery with a constant voltage of 4.2 V, and charging the battery with a constant current of 0.3 C till the battery is fully charged. By means of the charge control method, the rechargeable battery can be rapidly charged.
Description
Technical field
The present invention relates to electronic technology field, particularly relate to a kind of charge control method of rechargeable battery.
Background technology
The driving power of electrical equipment generally includes one or more rechargeable battery (lithium battery).Along with the enhancing of people's environmental consciousness, the application of electrical equipment is more and more extensive, and the charging rate how improving rechargeable battery has become important technical problem.
Charge control method is the key factor affecting rechargeable battery charging rate, and in the charge control method of prior art, control circuit is made up of analogue device, usually controls charging process and divides three phases to carry out.Fig. 1 is the charging process curve synoptic diagram of prior art, and as shown in Figure 1, abscissa is time t, and ordinate is charging current I, is use the current versus cell of 0.7C to carry out constant current charge, until cell voltage reaches 3.0V at first stage; The current versus cell being use 1.0C at second stage carries out constant current charge, until cell voltage reaches 4.2V; 4.2 V constant voltage charges are carried out to battery, until be full of by battery electric quantity at three phases.Above-mentioned charge control method, charging rate is slow, can not meet the requirement of user's charging rate.
In recent years, digital processing technology is increasingly mature, the cost performance of microcontroller improves constantly, the charge control method of battery also develops towards intelligent direction, the present invention will provide a kind of charge control method based on digital processing technology and microcontroller, real time electrical quantity according to battery carries out intelligent charge control, realizes the quick charge to rechargeable battery.
Summary of the invention
The invention provides a kind of charge control method of rechargeable battery, in order to improve the charging rate of rechargeable battery.
The invention provides a kind of charge control method of rechargeable battery, when the initial voltage of described rechargeable battery is between 2.0V and 3.0V, described method comprises:
The electric current of 0.7C is used to carry out constant current charge to described battery, until described cell voltage reaches 3.0V;
The electric current of 2.0C is used to carry out constant current charge to described battery, until described cell voltage reaches 4.05V;
4.05V constant voltage charge is carried out to described battery;
The electric current of 1.0C is used to carry out constant current charge to described battery, until described cell voltage reaches 4.2V;
4.2V constant voltage charge is carried out to described battery;
The electric current of 0.3C is used to carry out constant current charge to described battery, until be full of by described battery electric quantity.
Method as above, wherein, described method is applied to the charger comprising master controller, anti exciting converter and sample circuit, described master controller obtains the real-time input voltage of charger and the real-time voltage of rechargeable battery by sample circuit, and according to the real-time input voltage of charger and the real-time voltage of rechargeable battery, calculate the duty ratio controlling anti exciting converter main switch ON time, export the PWM ripple of corresponding duty ratio, realize controlling the charging of battery.
The charge control method of rechargeable battery provided by the invention, when the initial voltage of rechargeable battery is between 2.0V and 3.0V, first the current versus cell of 0.7C is used to carry out constant current charge, until cell voltage reaches 3.0V, then the current versus cell of 2.0C is used to carry out constant current charge, until cell voltage reaches 4.05V, and 4.05V constant voltage charge is carried out to battery, the current versus cell re-using 1.0C carries out constant current charge, until cell voltage reaches 4.2V, and 4.2V constant voltage charge is carried out to battery, the current versus cell finally re-using 0.3C carries out constant current charge, until battery electric quantity is full of.And the charging method of prior art is: first use the current versus cell of 0.7C to carry out constant current charge, until cell voltage reaches 3.0V, then the current versus cell of 1.0C is used to carry out constant current charge, until cell voltage reaches 4.2V, again 4.2 V constant voltage charges are carried out, until be full of by battery electric quantity to battery.Compared with the charge control method of prior art, the charge control method of rechargeable battery provided by the invention effectively raises the charging rate of rechargeable battery.
Accompanying drawing explanation
Fig. 1 is the charging process curve synoptic diagram of prior art;
Fig. 2 is the flow chart of the charge control method embodiment of rechargeable battery provided by the invention;
Fig. 3 is charging process curve synoptic diagram of the present invention;
Fig. 4 is the realizing circuit figure of the charge control method embodiment of rechargeable battery provided by the invention.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Fig. 2 is the flow chart of the charge control method embodiment of rechargeable battery provided by the invention.Fig. 3 is charging process curve synoptic diagram of the present invention, and in figure 3, abscissa is time t, and ordinate is charging current I.In the present embodiment, the initial voltage of rechargeable battery is between 2.0V and 3.0V, and with reference to shown in Fig. 2 and Fig. 3, the charge control method of rechargeable battery can comprise following content.
The current versus cell of S201, use 0.7C carries out constant current charge, until cell voltage reaches 3.0V.
The current versus cell of S202, use 2.0C carries out constant current charge, until cell voltage reaches 4.05V.
S203,4.05V constant voltage charge is carried out to battery.
The current versus cell of S204, use 1.0C carries out constant current charge, until cell voltage reaches 4.2V.
S205,4.2V constant voltage charge is carried out to battery.
The current versus cell of S206, use 0.3C carries out constant current charge, until be full of by battery electric quantity.
Concrete, described method can be applied to the charger comprising master controller, anti exciting converter and sample circuit, described master controller obtains the real-time input voltage of charger and the real-time voltage of rechargeable battery by sample circuit, and according to the real-time input voltage of charger and the real-time voltage of rechargeable battery, calculate the duty ratio controlling anti exciting converter main switch ON time, export the PWM(Pulse Width Modulation of corresponding duty ratio, pulse width modulation) ripple, realize controlling the charging of battery.
Fig. 4 is the realizing circuit figure of the charge control method embodiment of rechargeable battery provided by the invention.As shown in Figure 3, in the present embodiment, master controller can select STM32 microcontroller, and master controller is connected with drive circuit, and drive circuit connects the grid of metal-oxide-semiconductor switch, and master controller controls opening and cut out of metal-oxide-semiconductor switch by drive circuit; The drain electrode of metal-oxide-semiconductor K switch is connected with the different name end of anti exciting converter UC former limit inductance, and the Same Name of Ends of anti exciting converter former limit inductance connects power supply DC, and anti exciting converter secondary inductance is connected to the two ends of battery B by diode D; The electric capacity C with cell parallel is provided with between the positive pole and the Same Name of Ends of secondary inductance of diode.Sampling resistor R3 and R4 is provided with, if supply power voltage is between power supply DC and ground
, master controller is connected between R3 and R4, with sampled input voltage
.Be provided with sampling resistor R1 and R2 between the positive pole of battery B and ground, master controller is connected between R1 and R2, with the voltage to earth U of sampling battery B positive terminal.Master controller is sampled by the instantaneous terminal voltage of sample circuit to input voltage and battery, and by analyzing the sampling input terminal voltage of gained and battery terminal voltage, exports pwm waveform, controls opening and closedown of anti exciting converter circuit.
The charge control method of rechargeable battery provided by the invention, master controller controls opening and cut out of metal-oxide-semiconductor switch by drive circuit, realizes the controlled charging to battery.Further, master controller can also carry out real-time sampling by the terminal voltage of sample circuit to input voltage and each batteries, and the real time electrical quantity according to battery carries out intelligent charge control.When the initial voltage of rechargeable battery is between 2.0V and 3.0V, first the current versus cell of 0.7C is used to carry out constant current charge, until cell voltage reaches 3.0V, then the current versus cell of 2.0C is used to carry out constant current charge, until cell voltage reaches 4.05V, and 4.05V constant voltage charge is carried out to battery, the current versus cell re-using 1.0C carries out constant current charge, until cell voltage reaches 4.2V, and 4.2V constant voltage charge is carried out to battery, the current versus cell finally re-using 0.3C carries out constant current charge, until be full of by battery electric quantity.And the charging method of prior art is: first use the current versus cell of 0.7C to carry out constant current charge, until cell voltage reaches 3.0V, then the current versus cell of 1.0C is used to carry out constant current charge, until cell voltage reaches 4.2V, again 4.2 V constant voltage charges are carried out, until be full of by battery electric quantity to battery.Compared with the charge control method of prior art, the charge control method of rechargeable battery provided by the invention effectively raises the charging rate of rechargeable battery, achieves the quick charge to rechargeable battery, and ensure that charging safety
Last it is noted that the foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (2)
1. a charge control method for rechargeable battery, the initial voltage of described rechargeable battery, between 2.0V and 3.0V, is characterized in that, described method comprises:
The electric current of 0.7C is used to carry out constant current charge to described battery, until described cell voltage reaches 3.0V;
The electric current of 2.0C is used to carry out constant current charge to described battery, until described cell voltage reaches 4.05V;
4.05V constant voltage charge is carried out to described battery;
The electric current of 1.0C is used to carry out constant current charge to described battery, until described cell voltage reaches 4.2V;
4.2V constant voltage charge is carried out to described battery;
The electric current of 0.3C is used to carry out constant current charge to described battery, until be full of by described battery electric quantity.
2. method according to claim 1, it is characterized in that, described method is applied to the charger comprising master controller, anti exciting converter and sample circuit, described master controller obtains the real-time input voltage of charger and the real-time voltage of rechargeable battery by sample circuit, and according to the real-time input voltage of charger and the real-time voltage of rechargeable battery, calculate the duty ratio controlling anti exciting converter main switch ON time, export the PWM ripple of corresponding duty ratio, realize controlling the charging of battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410791881.3A CN104467103A (en) | 2014-12-19 | 2014-12-19 | Charge control method for rechargeable battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410791881.3A CN104467103A (en) | 2014-12-19 | 2014-12-19 | Charge control method for rechargeable battery |
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| CN104467103A true CN104467103A (en) | 2015-03-25 |
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| CN201410791881.3A Pending CN104467103A (en) | 2014-12-19 | 2014-12-19 | Charge control method for rechargeable battery |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105162181A (en) * | 2015-07-01 | 2015-12-16 | 深圳天珑无线科技有限公司 | Charging method and device |
| CN106684480A (en) * | 2016-11-22 | 2017-05-17 | 四川尚航智能科技有限公司 | Smart lithium-battery capacitive charging method based on PWM control |
| CN111509803A (en) * | 2020-04-26 | 2020-08-07 | 深圳润丰新能源有限公司 | Stepped lithium battery charging control method |
| CN114683874A (en) * | 2020-12-25 | 2022-07-01 | 苏州宝时得电动工具有限公司 | Automatic working system, charging station and charging control method |
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| CN101316048A (en) * | 2007-05-29 | 2008-12-03 | 扬州福德电池有限公司 | Intelligent charge control method for Ni-MH power accumulator set |
| CN102185349A (en) * | 2011-05-04 | 2011-09-14 | 奇瑞汽车股份有限公司 | Battery charging system and method |
| CN104065149A (en) * | 2014-07-09 | 2014-09-24 | 昂宝电子（上海）有限公司 | Charge control circuit, flyback type power source transformation system and charge control method |
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2014
- 2014-12-19 CN CN201410791881.3A patent/CN104467103A/en active Pending
Patent Citations (3)
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| CN101316048A (en) * | 2007-05-29 | 2008-12-03 | 扬州福德电池有限公司 | Intelligent charge control method for Ni-MH power accumulator set |
| CN102185349A (en) * | 2011-05-04 | 2011-09-14 | 奇瑞汽车股份有限公司 | Battery charging system and method |
| CN104065149A (en) * | 2014-07-09 | 2014-09-24 | 昂宝电子（上海）有限公司 | Charge control circuit, flyback type power source transformation system and charge control method |
Non-Patent Citations (1)
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| 百度文库: "《电池充电过程与充电方法》", 8 November 2013 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105162181A (en) * | 2015-07-01 | 2015-12-16 | 深圳天珑无线科技有限公司 | Charging method and device |
| CN106684480A (en) * | 2016-11-22 | 2017-05-17 | 四川尚航智能科技有限公司 | Smart lithium-battery capacitive charging method based on PWM control |
| CN106684480B (en) * | 2016-11-22 | 2020-12-29 | 四川尚航智能科技有限公司 | PWM-based control intelligent lithium battery capacitive charging method |
| CN111509803A (en) * | 2020-04-26 | 2020-08-07 | 深圳润丰新能源有限公司 | Stepped lithium battery charging control method |
| CN114683874A (en) * | 2020-12-25 | 2022-07-01 | 苏州宝时得电动工具有限公司 | Automatic working system, charging station and charging control method |
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Application publication date: 20150325 |
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