CN203086194U - A lithium battery charger circuit - Google Patents
A lithium battery charger circuit Download PDFInfo
- Publication number
- CN203086194U CN203086194U CN2013200203685U CN201320020368U CN203086194U CN 203086194 U CN203086194 U CN 203086194U CN 2013200203685 U CN2013200203685 U CN 2013200203685U CN 201320020368 U CN201320020368 U CN 201320020368U CN 203086194 U CN203086194 U CN 203086194U
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- charging
- module
- current
- charging chip
- 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
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model relates to a lithium battery charger circuit comprising a DC/DC module and a charging chip. The DC/DC module is used for converting externally-inputted voltage into the operating voltage of a charging chip and supplying electricity for the charging chip. A charging state indicating module displaying the charging state of a lithium battery is connected between the DC/DC module and the charging chip. The charging chip is connected with a current precision control module used for controlling the precision of the output current of the charging chip. The charging state indicating module comprises a double-color light emitting diode and two current-limiting resistors. The double-color light emitting diode is connected with the two current-limiting resistors in series. The lithium battery charger circuit uses the lithium battery charging chip to perform constant-current/constant-voltage charging on the lithium battery, uses the DC/DC module with high precision and a wide voltage range to supply electricity for a charging circuit, and uses the color collocation of the double-color light emitting diode to achieve the display of the charging state. The lithium battery charger circuit has characteristics of a simple circuit, reliable charging, explicit display, a wide power supplying range, multipath charging, and increasing charging efficiency.
Description
Technical field
The utility model relates to a kind of circuit, particularly a kind of lithium battery charger circuit.
Background technology
Lithium battery is the abbreviation of lithium ion battery, and the lithium cell charging circuit adopts discrete device more at present, provides power supply by transformer and detecting circuit for circuit, and this mode can make charging voltage very unstable, and serious meeting causes damage to battery; And judge whether that by simple transistor voltage testing circuit charging finishes, the situation that undercharge takes place easily or overcharge shortens battery life.
At present general charging circuit all only provides the single channel charging, shows also very simply, has only the power connection indicator light.
The utility model content
Technical problem to be solved in the utility model provides a kind of lithium battery charger circuit, a kind ofly can carry out constant current/constant voltage charging to lithium battery, peripheral circuit is simple, and the output voltage precision can reach 1%, output current is adjustable, has the multichannel charger of charged state indication.
The technical scheme that the utility model solves the problems of the technologies described above is as follows: a kind of lithium battery charger circuit, comprise DC/DC module and charging chip, described DC/DC module is used for the voltage transformation of outside input is the operating voltage of charging chip and is the charging chip power supply, connect the charged state indicating module that shows the lithium cell charging state between described DC/DC module and the described charging chip, described charging chip is connected with the current precision control module that is used to control charging chip output current precision.
On the basis of technique scheme, the utility model can also be done following improvement.
Further, described charged state indicating module comprises dichromatic LED and two current-limiting resistances, described dichromatic LED is connected in series with two current-limiting resistances respectively, the positive pole of described dichromatic LED is connected to the power output end of DC/DC module and charging chip power input, Enable Pin, and the negative pole of described dichromatic LED is connected also ground connection with two current-limiting resistances back that is connected in series respectively with charging chip charged state indication end, battery error condition indication end.
Further, described current precision control module comprises two current precision controlling resistances, described two current precision controlling resistances are connected in series, described two current precision controlling resistance two ends that are connected in series are provided with end with described charging chip electric current respectively and are connected with earth terminal, by regulating other resistance of less resistance level in two current precision controlling resistances, improve current precision.
Further, the input voltage of described DC/DC module is that 18-36 volt, output voltage are 5 volts.
Further, described DC/DC module is one or more charging chip power supplies.
The beneficial effects of the utility model are: the utility model adopts the lithium cell charging chip that lithium battery is carried out the constant current/constant voltage charging, and the output voltage precision can reach 1%, output current is adjustable, the DC/DC module that adopts the high-precision wide voltage range is the charging circuit power supply, adopt the demonstration of the colour match realization charged state of dichromatic LED, but circuit is simple, charging is reliable, show the wide multichannel charging of clear and definite, supply district, has improved charging efficiency.
Description of drawings
Fig. 1 is the utility model lithium battery charger circuit diagram.
Embodiment
Below in conjunction with accompanying drawing principle of the present utility model and feature are described, institute gives an actual example and only is used to explain the utility model, is not to be used to limit scope of the present utility model.
As shown in Figure 1, the utility model lithium battery charger circuit, comprise DC/DC module and charging chip, the DC/DC module is used for the voltage transformation of outside input is the operating voltage of charging chip UCT3142C and is charging chip UCT3142C power supply, connect the charged state indicating module that shows the lithium cell charging state between DC/DC module and the charging chip UCT3142C, charging chip UCT3142C is connected with and is used to control the current precision control module that charging chip UCT3142C outputs to the current precision of lithium battery.The charged state indicating module comprises dichromatic LED 4V1 and two current-limiting resistance 4R1,4R2, dichromatic LED 4V1 respectively with current-limiting resistance 4R1,4R2 is connected in series, the positive pole of dichromatic LED 4V1 is connected to the power output end of DC/DC module and the power input of charging chip UCT3142C (VIN pin), Enable Pin (CE pin), the negative pole of dichromatic LED 4V1 respectively with current-limiting resistance 4R2, after 4R1 is connected in series and the charged state indication end (CHRG pin) of charging chip UCT3142C, battery error condition indication end (FAULT pin) connects and ground connection.The current precision control module comprises two current precision controlling resistances (4R3,4R5), described two current precision controlling resistances (4R3,4R5) are connected in series, and described two current precision controlling resistance two ends that are connected in series are provided with end (ISET pin) with described charging chip electric current respectively and are connected with earth terminal.The resistance that the utility model will be controlled the output current size is divided into two different other resistance of resistance level, only less other resistance of resistance level is adjusted during adjusting, thereby the precision of output current has been improved an order of magnitude.
The utility model adopts lithium cell charging chip UCT3142C as charge controlling chip, and the DC/DC module that adopts the high-precision wide voltage range is the charging circuit power supply, adopts the demonstration of the colour match realization charged state of dichromatic LED.The inner integrated power transistor of chip UCT3142C does not need external impressed current to detect resistance and choked flow diode during application, output voltage 4.2V ± 1% adopts the precharge mode of little electric current when cell voltage is low, adopt constant current, constant voltage, constant temperature mode charging.Have and recharge function automatically, but state indication output driving LED shows.Dichromatic LED has three pins, and there are red and green two kinds of luminous elements inside, to different pins, makes rubescent look of light-emitting diode or green light by on-load voltage, and this circuit design is green light Chang Liang, shiny red during charging.At charging chip UCT3142C front end; adopted DC/DC module WRH25-24S05 module to power; the characteristics of this module are the output voltages that can provide stable; has the overcurrent-overvoltage overheat protective function; it is the charging chip power supply that the DC/DC module changes the 18-36V DC input voitage into 5V voltage; can realize being that 6 joint lithium batteries charge simultaneously, and respectively organize charging circuit and work alone, be independent of each other.The utility model can carry out the constant current/constant voltage charging to lithium battery, and peripheral circuit is simple, and the output voltage precision can reach 1%, and output current is adjustable, has the charged state indication, has improved charging efficiency.
The utility model when work,, begin battery is charged when cell voltage during greater than power supply low-voltage detection threshold.If cell voltage is lower than 3V, charger carries out precharge with the protection battery with little electric current to battery.When cell voltage was higher than 3V, charger adopted constant current mode to battery charge.When cell voltage during near the battery-end modulation voltage, enter the constant voltage charge pattern, charging current reduces gradually.When charging current was reduced to charging end threshold value, charge cycle finished.
The above only is preferred embodiment of the present utility model, and is in order to restriction the utility model, not all within spirit of the present utility model and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within the protection range of the present utility model.
Claims (5)
1. lithium battery charger circuit, it is characterized in that, comprise DC/DC module and charging chip, described DC/DC module is used for the voltage transformation of outside input is the operating voltage of charging chip and is the charging chip power supply, connect the charged state indicating module that shows the lithium cell charging state between described DC/DC module and the described charging chip, described charging chip is connected with the current precision control module that is used to control charging chip output current precision.
2. according to the described a kind of lithium battery charger circuit of claim 1, it is characterized in that, described charged state indicating module comprises dichromatic LED and two current-limiting resistances, described dichromatic LED is connected in series with two current-limiting resistances respectively, the positive pole of described dichromatic LED is connected to the power output end of DC/DC module and charging chip power input, Enable Pin, and the negative pole of described dichromatic LED is connected also ground connection with two current-limiting resistances back that is connected in series respectively with charging chip charged state indication end, battery error condition indication end.
3. according to claim 1 or 2 described a kind of lithium battery charger circuit, it is characterized in that, described current precision control module comprises two current precision controlling resistances, described two current precision controlling resistances are connected in series, and described two current precision controlling resistance two ends that are connected in series are provided with end with described charging chip electric current respectively and are connected with earth terminal.
4. according to the described a kind of lithium battery charger circuit of claim 1, it is characterized in that the input voltage of described DC/DC module is that 18-36 volt, output voltage are 5 volts.
5. according to claim 1,2 or 4 described a kind of lithium battery charger circuit, it is characterized in that described DC/DC module is one or more charging chip power supplies.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200203685U CN203086194U (en) | 2013-01-15 | 2013-01-15 | A lithium battery charger circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200203685U CN203086194U (en) | 2013-01-15 | 2013-01-15 | A lithium battery charger circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203086194U true CN203086194U (en) | 2013-07-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013200203685U Expired - Lifetime CN203086194U (en) | 2013-01-15 | 2013-01-15 | A lithium battery charger circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN203086194U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103746427A (en) * | 2014-01-09 | 2014-04-23 | 小米科技有限责任公司 | Power supply, power supply charging circuit and method and terminal equipment |
| CN108649651A (en) * | 2018-06-07 | 2018-10-12 | 安徽海锂子新能源科技股份有限公司 | A kind of charged lithium cells charging suite and its charging circuit |
| CN108649261A (en) * | 2018-06-07 | 2018-10-12 | 安徽海锂子新能源科技股份有限公司 | A kind of convenient charged lithium cells and its charging circuit |
-
2013
- 2013-01-15 CN CN2013200203685U patent/CN203086194U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103746427A (en) * | 2014-01-09 | 2014-04-23 | 小米科技有限责任公司 | Power supply, power supply charging circuit and method and terminal equipment |
| CN108649651A (en) * | 2018-06-07 | 2018-10-12 | 安徽海锂子新能源科技股份有限公司 | A kind of charged lithium cells charging suite and its charging circuit |
| CN108649261A (en) * | 2018-06-07 | 2018-10-12 | 安徽海锂子新能源科技股份有限公司 | A kind of convenient charged lithium cells and its charging circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130724 |
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| CX01 | Expiry of patent term |