CN203101602U - Lithium battery capacity measuring device - Google Patents
Lithium battery capacity measuring device Download PDFInfo
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- CN203101602U CN203101602U CN 201320021230 CN201320021230U CN203101602U CN 203101602 U CN203101602 U CN 203101602U CN 201320021230 CN201320021230 CN 201320021230 CN 201320021230 U CN201320021230 U CN 201320021230U CN 203101602 U CN203101602 U CN 203101602U
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Abstract
The utility model discloses a lithium battery capacity measuring device. The lithium battery capacity measuring device includes a 3.7V lithium battery, a lithium battery polarity indicating circuit, a constant current discharge control circuit, a constant current fast/slow discharge circuit, a discharge indication circuit, a 1.5V quartz clock working power supply and a quartz clock. The lithium battery capacity measuring device is characterized in that a TL431-model circuit is selected as a reference voltage detection circuit IC1 in the constant current discharge control circuit. The capacities of mobile phone lithium batteries or other lithium batteries which have been used for a long time are decreased, but the specific capacities of the mobile phone lithium batteries or other lithium batteries cannot be known. The lithium battery capacity measuring device of the utility model is a device which can satisfy the measurement requirements of the lithium batteries; the circuits of the device do not need to be additionally connected with a working power supply and are powered by detected lithium batteries, and the lithium battery capacity measuring device is suitable for lithium batteries without discharge protection boards. Because there is no need to know the exact capacities of the lithium batteries, there is also no need to draw discharge curves, and therefore, the quartz clock is adopted to record discharge time; and the lithium battery capacity measuring device of the utility model is advantageous in easiness in production, low production cost, and convenient usage.
Description
Technical field
The utility model belongs to electronic technology and battery boosting technology field, is about a kind of lithium battery capacity measurement mechanism.
Background technology
The cellular li-ion battery of using for a long time or other lithium batteries, and the lithium battery of pulling down in the cells in notebook computer group, these lithium battery capacities descend, but do not know to also have how many capacity actually.Through repetition test, the utility model has designed a kind of device that meets the lithium battery measurement requirement, and the circuit of this device does not need to connect in addition working power, and circuit is suitable for not having the lithium battery of discharge prevention plate by tested lithium battery power supply itself.Because do not need to know lithium battery capacity accurately, do not need to draw discharge curve yet, so adopt crystal clock to count the recording playback electricity time, to make than being easier to, cost of manufacture is low, uses more convenient as a kind of lithium battery capacity measurement mechanism.
Below describe lithium battery capacity measurement mechanism described in the utility model related relevant manufacturing technology content in manufacturing process in detail.
The utility model content
Goal of the invention and beneficial effect: the cellular li-ion battery of using for a long time or other lithium batteries, and the lithium battery of pulling down in the cells in notebook computer group, these lithium battery capacities descend, but do not know to also have how many capacity actually.Through repetition test, the utility model has designed a kind of device that meets the lithium battery measurement requirement, and the circuit of this device does not need to connect in addition working power, and circuit is suitable for not having the lithium battery of discharge prevention plate by tested lithium battery power supply itself.Because do not need to know the accurate capacity of lithium battery, do not need to draw discharge curve yet, so adopt crystal clock to count the recording playback electricity time, to make than being easier to, cost of manufacture is low, uses easily as a kind of lithium battery capacity measurement mechanism.
The circuit working principle: circuit uses reference voltage testing circuit IC1(TL431) setting lithium battery sparking voltage; after having arrived setting voltage; circuit cuts off discharge current automatically; device also designs and prevents the low discharging current function simultaneously; can make the volume ratio that records more accurate, be suitable for not having the lithium battery of discharge prevention plate.When toggle switch SW disconnected, 2 3.3 Ω resistance were series connection, the about 100mA of discharge current, and the product of duration is the capacity (mAh) of lithium battery during the walking of discharge current and crystal clock.When measuring jumbo lithium battery, should discharge current be doubled toggle switch SW closure, that is: 200mA can make shortening discharge time-half of lithium battery.
Whether the constant-current discharge circuit working, and by the dividing potential drop decision of reference voltage testing circuit IC1 and resistance R 2, resistance R 3, what the utility model circuit was set is 3.3V by operating voltage.Find that in test lithium battery depresses when dropping to 3.3V, discharge current has dropped to not enough 100mA, and the dump energy of actual lithium battery is few, and cut-off voltage is crossed low unfavorable to lithium battery.Resistance R 5 provides a positive feedback, can make circuit accelerate counter-rotating, produces the return difference of an about 0.3V simultaneously, arrives 3.3V when the lithium battery pressure drop, can rise at once about 3.5V after circuit ends, and resistance R 5 can also be avoided the circuit frequent movement.
Technical characterictic: the lithium battery capacity measurement mechanism, it comprises 3.7V lithium battery, lithium battery polarity indicating circuit, constant-current discharge control circuit, constant current speed discharge circuit, discharge indicating circuit, 1.5V crystal clock working power and crystal clock, it is characterized in that:
Lithium battery polarity indicating circuit: it is made up of red light emitting diodes LED1, green LED LED2 and resistance R 1, the end of the anodal connecting resistance R1 of the negative pole of red light emitting diodes LED1 and green LED LED2, the negative pole of the positive pole of red light emitting diodes LED1 and green LED LED2 connects the negative pole and the circuit ground GND of lithium battery, the positive pole of another termination lithium battery of resistance R 1;
The constant-current discharge control circuit: it is made up of reference voltage testing circuit IC1, resistance R 2, resistance R 3 and resistance R 5, the model that reference voltage testing circuit IC1 selects for use is TL431, the negative pole K of reference voltage testing circuit IC1 connects the collector of positive-negative-positive silicon triode VT1, the end of the reference edge R connecting resistance R2 of reference voltage testing circuit IC1, an end of resistance R 3 and an end of resistance R 5, the positive pole of another termination lithium battery of resistance R 2, the other end connection circuit ground GND of resistance R 3, the 1st pin of another termination flicker integrated circuit (IC) 2 of resistance R 5;
Constant current speed discharge circuit: it is by positive-negative-positive silicon triode VT1, positive-negative-positive silicon triode VT2, resistance R 7, resistance R 4, toggle switch SW and resistance R 6 are formed, the base stage of positive-negative-positive silicon triode VT1 connects the emitter of positive-negative-positive silicon triode VT2 and an end of resistance R 7, the end of the other end connecting resistance R4 of resistance R 7 and the end of toggle switch SW, the positive pole of another termination lithium battery of the other end of resistance R 4 and toggle switch SW, the base stage of positive-negative-positive silicon triode VT2 connects an end of positive-negative-positive silicon triode VT1 collector and resistance R 6, the positive pole of another termination lithium battery of resistance R 6, positive-negative-positive silicon triode VT2 collector connect the 1st pin of flicker integrated circuit (IC) 2;
1.5V crystal clock working power: it is made up of resistance R 8, silicon rectifier diode D1～D2, the 1st pin of flicker integrated circuit (IC) 2 connects the positive pole of silicon rectifier diode D1 and the positive pole of crystal clock power supply by resistance R 8, the negative pole of silicon rectifier diode D1 connects the positive pole of silicon rectifier diode D2, the negative pole connection circuit ground GND of silicon rectifier diode D2 and the negative pole of crystal clock power supply.
The discharge indicating circuit: it is made up of flicker integrated circuit (IC) 2 and yellow light-emitting diode LED3, the model that flicker integrated circuit (IC) 2 is selected for use is LEg9816, the 1st pin of flicker integrated circuit (IC) 2 connects the positive pole of yellow light-emitting diode LED3, the negative pole of yellow light-emitting diode LED3 connects the 2nd pin of flicker integrated circuit (IC) 2, the 3rd pin connection circuit ground GND of flicker integrated circuit (IC) 2.
Description of drawings
Accompanying drawing 1 is the embodiment circuit working schematic diagram that the utility model provides a lithium battery capacity measurement mechanism.
Embodiment
Circuit working schematic diagram and description of drawings according to lithium battery capacity measurement mechanism shown in the accompanying drawing 1, and according to the annexation between the components and parts in the described each several part circuit of utility model content, and the components and parts technical parameter described in the embodiment requires to implement to realize the utility model.
The selection of components and parts and technical parameter thereof
IC1 is the reference voltage testing circuit, and the model of selecting for use is TL431, packing forms T0-92, and pin is respectively: R is that reference edge, A are negative pole for anodal, K; The output voltage at anodal A and negative pole K two ends is adjustable continuously in 2.5～36V scope, and current margin is 0.1～100mA, and the dynamic resistance representative value is 0.2 Ω;
IC2 is the flicker integrated circuit, and the model of selecting for use is LEg9816;
The model of VT1 is 8550, also positive-negative-positive silicon triode such as available 2SC9012, require Icm＞300 mA, VT2 can select miniwatt positive-negative-positive silicon triodes such as 2SC9015, A1015 for use, require hFE＞150;
The model that silicon rectifier diode D1～D2 selects for use is 1N4000, and the 1N4148 that perhaps selects for use requires 2 silicon rectifier diode series connection back forward drops just in time to be 1.5V;
LED1 is a red light emitting diodes, is used for lithium battery polarity and connects anti-indication;
LED2 is a green LED, and it inserts correct indication as lithium battery;
LED3 is a yellow light-emitting diode, and as the discharge circuit indication, yellow light-emitting diode LED3 is with the frequency scintillation of 2Hz in the lithium battery discharge process, and flicker integrated circuit (IC) 2 has T0-92 and two kinds of packing forms of soft encapsulation;
All resistance can use l/8 W metalfilmresistor, and the resistance of resistance R 1 is 470 Ω, and the resistance of resistance R 2 is 10K Ω, the resistance of resistance R 3 is 47K Ω, the resistance of resistance R 4, resistance R 7 and resistance R 8 is 3.3 Ω, and the resistance of resistance R 5 is 22K Ω, and the resistance of resistance R 6 is 1K Ω;
SW is a toggle switch; It is 1.5V that crystal clock is selected working power voltage, promptly uses the crystal clock of single battery.
Device circuit is made general condensed summary and circuit debugging
The ending discharge voltage of the utility model circuit design is 3.3V, and the control voltage of reference voltage testing circuit IC1 is by resistance R 2, the decision of resistance R 3 dividing potential drops;
If do not glimmer integrated circuit (IC) 2 when making, one tens Ohmage of can going here and there in the loop of yellow light-emitting diode LED3 replaces flicker integrated circuit (IC) 2;
If just be used to measure the following low capacity lithium battery of 600mAh, toggle switch SW can install.
Claims (2)
1. lithium battery capacity measurement mechanism, it comprises 3.7V lithium battery, lithium battery polarity indicating circuit, constant-current discharge control circuit, constant current speed discharge circuit, discharge indicating circuit, 1.5V crystal clock working power and crystal clock, it is characterized in that:
Described lithium battery polarity indicating circuit is made up of red light emitting diodes LED1, green LED LED2 and resistance R 1, the end of the anodal connecting resistance R1 of the negative pole of red light emitting diodes LED1 and green LED LED2, the negative pole of the positive pole of red light emitting diodes LED1 and green LED LED2 connects the negative pole and the circuit ground GND of lithium battery, the positive pole of another termination lithium battery of resistance R 1;
Described constant-current discharge control circuit is made up of reference voltage testing circuit IC1, resistance R 2, resistance R 3 and resistance R 5, the model that reference voltage testing circuit IC1 selects for use is TL431, the negative pole K of reference voltage testing circuit IC1 connects the collector of positive-negative-positive silicon triode VT1, the end of the reference edge R connecting resistance R2 of reference voltage testing circuit IC1, an end of resistance R 3 and an end of resistance R 5, the positive pole of another termination lithium battery of resistance R 2, the other end connection circuit ground GND of resistance R 3, the 1st pin of another termination flicker integrated circuit (IC) 2 of resistance R 5;
Described constant current speed discharge circuit is by positive-negative-positive silicon triode VT1, positive-negative-positive silicon triode VT2, resistance R 7, resistance R 4, toggle switch SW and resistance R 6 are formed, the base stage of positive-negative-positive silicon triode VT1 connects the emitter of positive-negative-positive silicon triode VT2 and an end of resistance R 7, the end of the other end connecting resistance R4 of resistance R 7 and the end of toggle switch SW, the positive pole of another termination lithium battery of the other end of resistance R 4 and toggle switch SW, the base stage of positive-negative-positive silicon triode VT2 connects an end of positive-negative-positive silicon triode VT1 collector and resistance R 6, the positive pole of another termination lithium battery of resistance R 6, positive-negative-positive silicon triode VT2 collector connect the 1st pin of flicker integrated circuit (IC) 2;
Described 1.5V crystal clock working power is made up of resistance R 8, silicon rectifier diode D1～D2, the 1st pin of flicker integrated circuit (IC) 2 connects the positive pole of silicon rectifier diode D1 and the positive pole of crystal clock power supply by resistance R 8, the negative pole of silicon rectifier diode D1 connects the positive pole of silicon rectifier diode D2, the negative pole connection circuit ground GND of silicon rectifier diode D2 and the negative pole of crystal clock power supply.
2. lithium battery capacity measurement mechanism according to claim 1, it is characterized in that: the discharge indicating circuit is made up of flicker integrated circuit (IC) 2 and yellow light-emitting diode LED3, the model that flicker integrated circuit (IC) 2 is selected for use is LEg9816, the 1st pin of flicker integrated circuit (IC) 2 connects the positive pole of yellow light-emitting diode LED3, the negative pole of yellow light-emitting diode LED3 connects the 2nd pin of flicker integrated circuit (IC) 2, the 3rd pin connection circuit ground GND of flicker integrated circuit (IC) 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320021230 CN203101602U (en) | 2013-01-15 | 2013-01-15 | Lithium battery capacity measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320021230 CN203101602U (en) | 2013-01-15 | 2013-01-15 | Lithium battery capacity measuring device |
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| Publication Number | Publication Date |
|---|---|
| CN203101602U true CN203101602U (en) | 2013-07-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320021230 Expired - Fee Related CN203101602U (en) | 2013-01-15 | 2013-01-15 | Lithium battery capacity measuring device |
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| CN (1) | CN203101602U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103033765A (en) * | 2013-01-15 | 2013-04-10 | 黄宇嵩 | Lithium battery capacity measuring device |
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2013
- 2013-01-15 CN CN 201320021230 patent/CN203101602U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103033765A (en) * | 2013-01-15 | 2013-04-10 | 黄宇嵩 | Lithium battery capacity measuring device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130731 Termination date: 20140115 |