CN101860054B - Charge management circuit of lithium-ion battery - Google Patents
Charge management circuit of lithium-ion battery Download PDFInfo
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- CN101860054B CN101860054B CN 201010165087 CN201010165087A CN101860054B CN 101860054 B CN101860054 B CN 101860054B CN 201010165087 CN201010165087 CN 201010165087 CN 201010165087 A CN201010165087 A CN 201010165087A CN 101860054 B CN101860054 B CN 101860054B
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- ion battery
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Abstract
The invention applies to the field of electronic circuits, and provides a charge management circuit of a lithium-ion battery, which comprises a DC-DC conversion circuit and a constant current control chip, wherein the constant current control chip is connected between the cathode of the lithium-ion battery to be charged and the negative input terminal of an input power supply, and the DC-DC conversion circuit comprises a chopper control chip, an inductor, a first resistance, a second resistor, a fly-wheel diode and a first capacitor; wherein the value of the first resistance or the second resistance can be adjusted. The resistances in the DC-DC conversion circuit are designed into adjustable resistances, so that the output voltage of the DC-DC conversion circuit can be adjusted, thereby changing charge limit voltage so as to adapt to different lithium-ion batteries to be charged.
Description
Technical field
The invention belongs to electronic circuit field, relate in particular to a kind of charge management circuit of lithium-ion battery.
Background technology
At present, the various direct current input lithium electricity charge management circuits that exist on the market are all realized charge function by a lithium electricity Charge Management IC, be characterized in what output voltage and charging current were all determined by the IC internal circuit, it is a steady state value, wherein output voltage is exactly the charging deboost of lithium ion battery, is generally 4.2V.The defective of sort circuit is to change according to the kind of battery charging deboost (the charging deboost of polymer Li-ion battery and ferric phosphate lithium cell is different), does not perhaps support to change the function that charge rate namely changes charging current according to battery capacity.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of charge management circuit of lithium-ion battery, is intended to solve the problem that existing lithium ion cell charging circuit can't change according to the kind of battery the charging deboost.
The embodiment of the invention is achieved in that a kind of charge management circuit of lithium-ion battery, comprises DC-DC change-over circuit and constant current control chip, and described constant current control chip is connected between the negative input end of the negative pole of lithium ion battery to be charged and input power; Described DC-DC change-over circuit comprises:
Copped wave control chip, two input connect respectively the positive and negative input of input power;
Inductance, the one end connects the output of described copped wave control chip, and the other end connects the positive pole of lithium ion battery to be charged;
The first resistance, the one end connects the positive pole of lithium ion battery to be charged, and the other end connects the feedback end of described copped wave control chip;
The second resistance, the one end connects the feedback end of described copped wave control chip, and the other end connects the earth terminal of described copped wave control chip;
Fly-wheel diode, the earth terminal of the described copped wave control chip of its anodic bonding, negative electrode connects the output of described copped wave control chip; And
The first electric capacity, the one end connects the feedback end of described copped wave control chip, and the other end connects the earth terminal of described copped wave control chip;
The resistance value of described the first resistance or described the second resistance is adjustable.
In the embodiment of the invention, by being adjustable resistance with the resistive arrangement in the DC-DC change-over circuit, so that the output voltage of DC-DC change-over circuit is adjustable, can change the charging deboost to adapt to different lithium ion batteries to be charged.
Description of drawings
Fig. 1 is the structure chart of the charge management circuit of lithium-ion battery that provides of the embodiment of the invention;
Fig. 2 is a kind of physical circuit figure of circuit structure shown in Figure 1.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
In the embodiment of the invention, the resistance in the DC-DC change-over circuit adopts adjustable resistance to realize, thereby so that the output voltage of DC-DC change-over circuit is adjustable.It is replaceable simultaneously can also to design the constant current control chip in circuit, and the user can select the constant current control chip of different current specification according to the actual requirements.
Fig. 1 shows the structure of the charge management circuit of lithium-ion battery that the embodiment of the invention provides, and for convenience of description, only shows the part relevant with present embodiment.
With reference to Fig. 1, charge management circuit of lithium-ion battery comprises DC-DC change-over circuit 1 and constant current control chip 2, constant current control chip 2 is connected between the negative pole and input power of lithium ion battery BATTERY to be charged, DC-DC change-over circuit 1 comprises the copped wave control chip, inductance L, the first resistance R 1, the second resistance R 2, sustained diode and the first capacitor C 1, wherein, two inputs of copped wave control chip are just connecting respectively input power, negative input end, one end of inductance L connects the output SW of copped wave control chip, the other end connects the positive pole of lithium ion battery BATTERY to be charged, one end of the first resistance R 1 connects the positive pole of lithium ion battery BATTERY to be charged, the other end connects the feedback end FB of copped wave control chip, the second resistance R 2 one ends connect the feedback end FB of copped wave control chip, and the other end connects the earth terminal GND of copped wave control chip.Sustained diode is used for the afterflow of copped wave control chip, and wherein the anodic bonding of sustained diode is at the earth terminal GND of copped wave control chip, and negative electrode is connected to the output SW of copped wave control chip.The first capacitor C 1 one ends connect the feedback end FB of copped wave control chip, and the other end connects the earth terminal GND of copped wave control chip, are used for the clutter of filtering feedback voltage signal.
In the embodiment of the invention, the resistance value of the first resistance R 1 or the second resistance R 2 is adjustable, the effect of DC/DC change-over circuit 1 is the charging deboost that input voltage is adjusted into lithium ion battery to be charged, general polymerization thing lithium ion battery and common lithium ion battery deboost are 4.2V, the deboost of ferric phosphate lithium cell is 3.65V, can adjust very easily output voltage (OUTPUT) by the adjusting resistance value, suppose that input voltage input is 5V, R1, R2 gets one group of suitable value makes OUTPUT equal 4.2V, so this circuit just can for single-lithium-battery (as 18650 lithium ion batteries or battery of mobile phone) charged, the value that changes R1 or R2 makes OUTPUT equal 3.65V, and this circuit has charged just can for the ferric phosphate lithium cell of single-unit or more piece parallel connection so.
Further, between the earth terminal GND of the positive pole of lithium ion battery BATTERY to be charged and copped wave control chip, also be connected with the second capacitor C 2, be used for the smooth output voltage signal.
In the embodiment of the invention, for realizing that further charging current is adjustable, it is replaceable that constant current control chip 2 is set, for example can be designed to the same slot of similar SIM cards of mobile phones, the effect of constant current control chip 2 is charging currents that lithium ion battery to be charged is crossed in steady flow, current value can require to change to the difference in charging interval along with the amount of capacity of battery and user, and different demand users selects the constant current control chip of different current specification to get final product.If give certain battery charging with this circuit, charging current is 300mA, the charging interval needs 4 hours, if customer requirements will foreshorten to two hours the charging interval, the specification that then can change constant current chip strengthens charging current and shortens the charging interval.
Above-mentioned lithium ion battery to be charged can be lithium polymer battery or ferric phosphate lithium cell, can be single-unit, also can be the more piece parallel connection.
Fig. 2 is a kind of specific embodiment of circuit structure shown in Figure 1, U1 is the DC/DC control chip, D1, L1, R1, R2, R3, R4, C1, C2, C7 are its peripheral circuits, the voltage that to input DC4-10V by the work of U1 and peripheral circuit thereof is adjusted to 3.65V and is added to the battery two ends, U2, U3 are two constant current chips, the specification of each is 350mA, and two are controlled at 700mA with charging current together; The present charging interval is 8 hours, if the user needs to foreshorten to 4 hours the charging interval now, so the specification of U2, U3 is replaced by 700mA and gets final product.
In the embodiment of the invention, by being adjustable resistance with the resistive arrangement in the DC-DC change-over circuit, so that the output voltage of DC-DC change-over circuit is adjustable, can change the charging deboost to adapt to different lithium ion batteries to be charged.It is replaceable simultaneously can also to design the constant current control chip in circuit, and the user can select the constant current control chip of different current specification according to the actual requirements, so that the length in charging interval is adjustable flexibly.
The above only is preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. a charge management circuit of lithium-ion battery is characterized in that, comprises DC-DC change-over circuit and constant current control chip, and described constant current control chip is connected between the negative input end of the negative pole of lithium ion battery to be charged and input power; Described DC-DC change-over circuit comprises:
Copped wave control chip, two input connect respectively the positive and negative input of input power;
Inductance, the one end connects the output of described copped wave control chip, and the other end connects the positive pole of lithium ion battery to be charged;
The first resistance, the one end connects the positive pole of lithium ion battery to be charged, and the other end connects the feedback end of described copped wave control chip;
The second resistance, the one end connects the feedback end of described copped wave control chip, and the other end connects the earth terminal of described copped wave control chip;
Fly-wheel diode, the earth terminal of the described copped wave control chip of its anodic bonding, negative electrode connects the output of described copped wave control chip; And
The first electric capacity, the one end connects the feedback end of described copped wave control chip, and the other end connects the earth terminal of described copped wave control chip;
The resistance value of described the first resistance or described the second resistance is adjustable.
2. charge management circuit of lithium-ion battery as claimed in claim 1 is characterized in that, also is connected with the second electric capacity between the earth terminal of the positive pole of lithium ion battery to be charged and described copped wave control chip.
3. charge management circuit of lithium-ion battery as claimed in claim 1 is characterized in that, described constant current control chip is replaceable.
4. charge management circuit of lithium-ion battery as claimed in claim 1 is characterized in that, described lithium ion battery to be charged is lithium polymer battery or ferric phosphate lithium cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010165087 CN101860054B (en) | 2010-04-29 | 2010-04-29 | Charge management circuit of lithium-ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010165087 CN101860054B (en) | 2010-04-29 | 2010-04-29 | Charge management circuit of lithium-ion battery |
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| Publication Number | Publication Date |
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| CN101860054A CN101860054A (en) | 2010-10-13 |
| CN101860054B true CN101860054B (en) | 2013-03-20 |
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| CN 201010165087 Active CN101860054B (en) | 2010-04-29 | 2010-04-29 | Charge management circuit of lithium-ion battery |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103051007A (en) * | 2011-10-15 | 2013-04-17 | 成都锐奕信息技术有限公司 | Charger of intelligent vehicle-mounted terminal |
| CN103051013A (en) * | 2011-10-15 | 2013-04-17 | 成都锐奕信息技术有限公司 | Transferring connection device in charging process of intelligent vehicle-mounted terminal |
| CN203434232U (en) * | 2013-08-30 | 2014-02-12 | 刘秋明 | Electronic cigarette and battery assembly thereof |
| CN107070229A (en) * | 2016-12-20 | 2017-08-18 | 南京海普水文科技有限公司 | A kind of ADCP transmitting source levels conditioned circuit and method |
| CN112467850B (en) * | 2020-12-09 | 2021-10-29 | 宗汉电通技术(深圳)有限公司 | Digital lithium ion battery management device based on TYPE-C |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5642029A (en) * | 1994-03-03 | 1997-06-24 | Sgs-Thomson Microelectronics S.R.L. | Constant current battery charger with auxiliary output for portable apparatus |
| CN1402901A (en) * | 1999-12-10 | 2003-03-12 | 吉莱特公司 | Battery pack |
| CN1633739A (en) * | 2002-02-15 | 2005-06-29 | 吉莱特公司 | Hybrid power supply |
| CN101552483A (en) * | 2007-10-25 | 2009-10-07 | 日立工机株式会社 | Charging device |
-
2010
- 2010-04-29 CN CN 201010165087 patent/CN101860054B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5642029A (en) * | 1994-03-03 | 1997-06-24 | Sgs-Thomson Microelectronics S.R.L. | Constant current battery charger with auxiliary output for portable apparatus |
| CN1402901A (en) * | 1999-12-10 | 2003-03-12 | 吉莱特公司 | Battery pack |
| CN1633739A (en) * | 2002-02-15 | 2005-06-29 | 吉莱特公司 | Hybrid power supply |
| CN101552483A (en) * | 2007-10-25 | 2009-10-07 | 日立工机株式会社 | Charging device |
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| CN101860054A (en) | 2010-10-13 |
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