CN201788268U - Capacity checking device for lithium batteries - Google Patents
Capacity checking device for lithium batteries Download PDFInfo
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- CN201788268U CN201788268U CN2010202677201U CN201020267720U CN201788268U CN 201788268 U CN201788268 U CN 201788268U CN 2010202677201 U CN2010202677201 U CN 2010202677201U CN 201020267720 U CN201020267720 U CN 201020267720U CN 201788268 U CN201788268 U CN 201788268U
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Abstract
The utility model relates to the capacity checking technology, and discloses a capacity checking device for lithium batteries, which has low cost and simple wiring. The key points of the technical scheme of the utility model are as follows: the capacity checking device for lithium batteries comprises a voltage-dividing detection circuit and an alarm display circuit, wherein, the voltage-dividing detection circuit is connected with the alarm display circuit, and comprises a first resistor, a second resistor, a capacitor and a first triode; the first resistor is connected with a base electrode of the first triode, and is earthed through the capacitor and the second resistor respectively; the capacitor and the second resistor are connected with the base electrode of the first triode; an emitting electrode of the first triode is earthed; the alarm display circuit comprises a third resistor, a fourth resistor, a fifth resistor, a second triode and a display lamp; a base electrode of the second triode is connected with a collecting electrode of the first triode through the third resistor; an emitting electrode of the second triode is connected with the collecting electrode of the first triode through the fourth resistor; and a collecting electrode of the second triode is earthed through the fifth resistor and the display lamp. The capacity checking device for lithium batteries has the advantages of low cost and simple wiring, and is applicable for the capacity checking of lithium batteries.
Description
Technical field
The utility model relates to the electric weight detection technique, relates to a kind of lithium battery amount detecting device specifically.
Background technology
For digital product in the market, lithium battery with its long service life, rated voltage height, environmental suitability is strong and lightweight advantage becomes first-selected supplying cell.One is divided into quadrate lithium battery and cylindricality lithium battery to lithium battery according to external form, is divided into aluminum hull lithium battery, box hat lithium battery and soft-package battery according to outsourcing material.But regardless of being which kind of type, needing that all it is carried out electric weight and detect, purpose is exactly in order to remind the user in time to charge when battery electric quantity is not enough, to prevent the battery electric quantity influence that the logarithmic code product causes after using totally.Lithium battery amount detection device commonly used at present is equipped with following two kinds: 1. and adopt special chip to detect, the accuracy of detection height, but cost is very high.2.A/D transition detection needs to use special-purpose A/D conversion mouthful line or chip, cost height, wiring complexity.
The utility model content
Technical problem to be solved in the utility model is: at the defective of traditional lithium battery amount detecting device cost height, wiring complexity, propose that a kind of cost is low, the simple lithium battery amount detecting device of wiring.
The utility model solves the problems of the technologies described above the technical scheme that is adopted: the lithium battery amount detecting device, comprise voltage-dividing detection circuit and alarm indication circuit, and voltage-dividing detection circuit connects the alarm indication circuit; Described voltage-dividing detection circuit comprises first resistance, second resistance, electric capacity and first triode, described first resistance connects the base stage of first triode, and respectively by the electric capacity and second resistance eutral grounding, electric capacity is connected the base stage of first triode, the grounded emitter of described first triode with second resistance; Described alarm indication circuit comprises the 3rd resistance, the 4th resistance, the 5th resistance, second triode and display lamp; The base stage of described second triode connects the collector of first triode by the 3rd resistance, and its emitter connects the collector of first triode by the 4th resistance, and its collector is by the 5th resistance and display lamp ground connection.
Described display lamp is a light emitting diode.
The beneficial effects of the utility model are: cost is low, wiring is simple, and occupying system resources is few.
Description of drawings
Fig. 1 is the electrical block diagram of embodiment.
Embodiment
The utility model will be further described below in conjunction with drawings and Examples.
The utility model is at the defective of traditional lithium battery amount detecting device cost height, wiring complexity, proposes that a kind of cost is low, the simple lithium battery amount detecting device of wiring.Because only be to use components and parts such as common triode, resistance, light emitting diode in this pick-up unit, cost is low, and wiring is simple.In addition, when adopting this pick-up unit to detect the lithium battery electric weight, only need to use a general-purpose interface line of main control chip can finish detection, occupying system resources is few.
Embodiment:
As shown in Figure 1, the lithium battery amount detecting device in this example comprises voltage-dividing detection circuit and alarm indication circuit, and voltage-dividing detection circuit connects the alarm indication circuit; Described voltage-dividing detection circuit comprises first resistance R 1, second resistance R 2, capacitor C and the first triode Q1, described first resistance R 1 connects the base stage of the first triode Q1, and respectively by capacitor C and second resistance R, 2 ground connection, capacitor C is connected the base stage of the first triode Q1, the grounded emitter of the described first triode Q1 with second resistance R 2; Described alarm indication circuit comprises the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, the second triode Q2 and light emitting diode D; The base stage of the described second triode Q2 is by the collector of the 3rd resistance R 3 connections first triode Q1, and its emitter is by the collector of the 4th resistance R 4 connections first triode Q1, and its collector is by the 5th resistance R 5 and light emitting diode D ground connection.
On concrete enforcement, Vbat is the lithium battery output voltage, need at first that the lithium battery threshold voltage of alarm and the conduction threshold voltage of first triode are selected first resistance R 1 for use as required, second resistance R 2, for example: the first triode Q1 selects paster triode 2N3905 for use, lithium battery is the series connection of 2 joint single lithium battery, need begin during to 5.5V (Vbat=5.5V) to report to the police in the lithium battery pressure drop, and, can determine first resistance R 1 according to formula Vbat=Vbe* (R1+R2)/R2 so because the conduction threshold voltage of paster triode 2N3905 is 0.5V (Vbe=0.5V), the size of second resistance R 2.
The emitter of the second triode Q2 connects+the 5V power supply, a general-purpose interface line GPI01 sampling A level point voltage of main control chip; When detecting, GPI01 is initialized as input state, when lithium battery voltage is higher than threshold voltage, the first triode Q1 conducting, the second triode Q2 conducting then, light emitting diode D lights, show that the lithium battery electric weight is normal at this moment, GPI01 detects low level; When lithium battery forced down in threshold voltage, the first triode Q1 ended, and the second triode Q2 ends then, light emitting diode D extinguishes, and GPI01 detects high level, enters alarm mode this moment, then, main control chip GPI01 is set to output mode, the output high level, the first triode Q1 remain off, light emitting diode D keeps extinguishing state, and the T1 that delays time then makes the GPI01 output low level, the then second triode Q2 conducting, light emitting diode D lights; The T2 that delays time again, it is input pattern that GPI01 is set, and detects again, so circulation.So, when lithium battery forced down in threshold voltage, light emitting diode D presented the T1 time and extinguishes+the periodicity blink states lighted of T2 time.The 3rd resistance R 3 and 5 metering functions of the 5th resistance R, the 4th resistance R 4 is a pull-up resistor, capacitor C strobes.
The utility model scheme required for protection comprises but is not limited only to the foregoing description; those skilled in the art makes an amendment slightly to the technical solution of the utility model according to foregoing description easily and reaches same technique effect, and it all belongs to protection domain of the present utility model.
Claims (2)
1. the lithium battery amount detecting device is characterized in that: comprise voltage-dividing detection circuit and alarm indication circuit, voltage-dividing detection circuit connection alarm indication circuit; Described voltage-dividing detection circuit comprises first resistance, second resistance, electric capacity and first triode, described first resistance connects the base stage of first triode, and respectively by the electric capacity and second resistance eutral grounding, electric capacity is connected the base stage of first triode, the grounded emitter of described first triode with second resistance; Described alarm indication circuit comprises the 3rd resistance, the 4th resistance, the 5th resistance, second triode and display lamp; The base stage of described second triode connects the collector of first triode by the 3rd resistance, and its emitter connects the collector of first triode by the 4th resistance, and its collector is by the 5th resistance and display lamp ground connection.
2. lithium battery amount detecting device as claimed in claim 1 is characterized in that: described display lamp is a light emitting diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202677201U CN201788268U (en) | 2010-07-22 | 2010-07-22 | Capacity checking device for lithium batteries |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202677201U CN201788268U (en) | 2010-07-22 | 2010-07-22 | Capacity checking device for lithium batteries |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201788268U true CN201788268U (en) | 2011-04-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202677201U Expired - Fee Related CN201788268U (en) | 2010-07-22 | 2010-07-22 | Capacity checking device for lithium batteries |
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| CN (1) | CN201788268U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104071316A (en) * | 2014-04-30 | 2014-10-01 | 中国科学院自动化研究所北仑科学艺术实验中心 | Lifesaving position indicating light with functions of positioning and forwarding and control method |
| CN104678318A (en) * | 2015-03-05 | 2015-06-03 | 黄宇嵩 | Battery performance detector |
| CN106768047A (en) * | 2016-12-22 | 2017-05-31 | 北京智信汇诚科技有限公司 | A kind of wireless vibration and temperature complex sensor |
-
2010
- 2010-07-22 CN CN2010202677201U patent/CN201788268U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104071316A (en) * | 2014-04-30 | 2014-10-01 | 中国科学院自动化研究所北仑科学艺术实验中心 | Lifesaving position indicating light with functions of positioning and forwarding and control method |
| CN104071316B (en) * | 2014-04-30 | 2016-12-07 | 中国科学院自动化研究所北仑科学艺术实验中心 | There is lifesaving Position indication lamp and the control method of location forwarding capability |
| CN104678318A (en) * | 2015-03-05 | 2015-06-03 | 黄宇嵩 | Battery performance detector |
| CN106768047A (en) * | 2016-12-22 | 2017-05-31 | 北京智信汇诚科技有限公司 | A kind of wireless vibration and temperature complex sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110406 Termination date: 20150722 |
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| EXPY | Termination of patent right or utility model |