CN201754176U - Battery detection circuit and device thereof - Google Patents
Battery detection circuit and device thereof Download PDFInfo
- Publication number
- CN201754176U CN201754176U CN2009202041528U CN200920204152U CN201754176U CN 201754176 U CN201754176 U CN 201754176U CN 2009202041528 U CN2009202041528 U CN 2009202041528U CN 200920204152 U CN200920204152 U CN 200920204152U CN 201754176 U CN201754176 U CN 201754176U
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- triode
- voltage
- detection circuit
- battery
- rheostat
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
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Abstract
The utility model provides a battery detection circuit which comprises a switch unit and a detection unit. External battery voltage is grounded respectively through the switch unit and the detection unit; the switch unit is switched on or off under the control of the external voltage; and the detection unit is used for detecting the voltage supplied by the battery when the switch unit is switched on. The battery detection circuit can effectively detect the battery voltage, and further gives a prompt whether to replace the battery or not according to the detection result. The utility model further provides a device adopting the above battery detection circuit.
Description
Technical field
The utility model relates to electronic applications, the particularly a kind of battery detection circuit and device thereof that can detect battery threshold voltage.
Background technology
Now increasing electronic product all can utilize battery as a kind of supply unit, such as the portable digital product, and vehicle electronics product, radio communication relevant device etc.At present, much all need when exhausting, the fast medicine of the electric energy of battery make the indication that the replacing battery need be changed with battery powered Circuits System.In general, when cell voltage reaches its threshold voltage, think that battery need change, therefore detection and the prompting battery altering to battery threshold voltage is in demand.
The utility model content
The technical matters that the utility model solves provides a kind of battery detection circuit that can detect battery threshold voltage.
The technical matters that the utility model solves provides a kind of device that can detect battery threshold voltage.
The technical scheme that the utility model solves the problems of the technologies described above is a kind of battery detection circuit, comprise switch element and detecting unit, external battery voltage is successively by this switch element and this detecting unit ground connection, this switch element is used for externally opening or closing under the Control of Voltage, and the voltage that this detecting unit is used for when this switch element is opened battery being provided detects.
In the utility model battery detection circuit, this switch element comprises a control end, and this detecting unit comprises that one detects output terminal, and this control end is used to receive the external voltage control signal, and this detection output terminal is used for the output voltage testing result.
In the utility model battery detection circuit, when this control end was applied in low level, this switch element was opened, and when this control end was applied in high level, this switch element was closed.
In the utility model battery detection circuit, this switch element also comprises one first triode and one first resistance, this detecting unit also comprises one second triode, one second resistance, one first rheostat and one second rheostat, the base stage of this first triode is connected to this control end by this first resistance, its emitter applies cell voltage, and its collector is successively by this first rheostat and this second rheostat ground connection.The base stage of this second triode is connected to the node between this first rheostat and this second rheostat, its grounded emitter, and its collector is connected to this detection output terminal and is connected to the collector of this first triode by this second resistance.
In the utility model battery detection circuit, this first triode is the positive-negative-positive triode, and this second triode is a NPN type triode.
In the utility model battery detection circuit, this first rheostat and this second rheostatic access resistance value satisfy makes the base stage of this second triode and emission voltage across poles be in critical voltage.
In the utility model battery detection circuit, this switch element was closed when this control end was applied in high level, and this battery detection circuit enters low power consumpting state.
The technical scheme that the utility model solves the problems of the technologies described above also provides a kind of device, comprises above-mentioned battery detection circuit.
Compared to prior art, the utility model battery detection circuit and device thereof comprise this switch element and this detecting unit, apply low level voltage by control end and open this switch element this switch element, can judge that whether operating voltage that external cell provides is greater than threshold voltage according to the voltage signal of the detection output terminal of this detecting unit output, whether consume thereby can detect battery power, and then make the prompting whether needs are changed battery according to the result who detects.The utility model battery detection circuit and device need not single-chip microcomputer can realize that battery electric quantity detects and the battery altering prompting, so it has the low advantage of cost.In addition, the control end of this switch element is applied high level voltage this switch element is closed in the detection back that finishes, thereby this battery detection circuit enters low power consumpting state, has also realized energy-conservation.
Description of drawings
Fig. 1 is the block diagram of the utility model battery detection circuit one better embodiment.
Fig. 2 is the electrical block diagram of battery detection circuit shown in Figure 1.
Embodiment
Seeing also Fig. 1, is the utility model battery detection circuit one better embodiment frame structure synoptic diagram.This battery detection circuit comprises a switch element 10 and a detecting unit 20.This switch element 10 comprises a control end IO 1.This detecting unit 20 comprises that one detects output terminal IO 2.The voltage VDD that external cell provides is successively via this switch element and this detecting unit ground connection.
This switch element 10 is used for externally opening or closing under the Control of Voltage, and the voltage that this detecting unit 20 is used for when this switch element 10 is opened battery being provided detects.This control end IO 1 is used to receive the external voltage control signal, and this detection output terminal IO 2 is used for the output voltage testing result.
Seeing also Fig. 2, is the electrical block diagram of battery detection circuit shown in Figure 1.This switch element 10 also comprises one first triode Q1 and one first resistance R 1.This detecting unit 20 also comprises one second triode Q2, one second resistance R 2, one first rheostat PR1 and one second rheostat PR2.
The base stage of this first triode Q1 is connected to this control end by this first resistance R 1, and its emitter applies cell voltage VDD, and its collector is successively by this first rheostat PR1 and this second rheostat PR2 ground connection.The base stage of this second triode Q2 is connected to the node between this first rheostat PR1 and this second rheostat PR2, its grounded emitter, its collector are connected to this detection output terminal IO 2 and are connected to the collector of this first triode Q1 by this second resistance R 2.
In the present embodiment, this first triode Q1 is the positive-negative-positive triode, and this second triode Q2 is a NPN type triode.The access resistance value of this first rheostat PR1 and this second rheostat PR2 satisfies makes the base stage of this second triode Q2 and emission voltage across poles be in critical voltage, promptly makes this second triode close Q2 and is operated between the cut-off region and amplification region of this second triode Q2 during for threshold voltage at cell voltage.
This battery detection circuit work narration principle is as follows, and wherein VDD represents the operating voltage that battery provides.
At first, this control end IO 1 is applied low level, make conducting between this first triode Q1 emitter and collector.
If this moment, the operating voltage VDD that provides of battery was greater than the threshold voltage of battery, this second triode Q2 conducting, this detects output terminal IO 2 output low levels.
Otherwise if the operating voltage VDD that this moment, battery provided is not more than the threshold voltage of battery, then this second triode Q2 ends, and this detects output terminal IO 2 and receives the output high level.
After detection is finished this first control end IO 1 is applied high level this first triode Q1 is ended, thereby close this voltage detecting circuit, make it enter low power consumpting state.
The utility model device comprises at least one above-mentioned battery detection circuit.
The utility model battery detection circuit and device comprise this switch element 10 and this detecting unit 20, apply low level voltage by control end IO 1 and open this switch element 10 this switch element 10, can judge that whether operating voltage that external cell provides is greater than threshold voltage according to the voltage signal of detection output terminal IO 2 output of this detecting unit 10, whether thereby can detect battery power consumes, and then make the prompting whether needs are changed battery according to the result who detects, and prompting needs to have changed battery when battery electric quantity exhausts soon.The utility model battery detection circuit and device need not single-chip microcomputer can realize that battery electric quantity detects and the battery altering prompting, so it has the low advantage of cost.
In addition, the control end IO 1 of this switch element 10 is applied high level voltage this switch element 10 is closed, make this battery detection circuit enter low power consumpting state, can also realize energy-conservation in the detection back that finishes.
The utility model battery detection circuit can also have other numerous variations embodiments, can also be other trigistors as this first triode Q1 and this second triode Q2.
Above content be in conjunction with concrete preferred implementation to further describing that the utility model is done, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be considered as belonging to protection domain of the present utility model.
Claims (6)
1. battery detection circuit, it is characterized in that: comprise switch element and detecting unit, the voltage that external cell provides is successively by this switch element and this detecting unit ground connection, this switch element is used for externally opening or closing under the Control of Voltage, and the voltage that this detecting unit is used for when this switch element is opened battery being provided detects.
2. battery detection circuit as claimed in claim 1 is characterized in that: this switch element comprises that one is used to receive the control end of external voltage control signal, and this detecting unit comprises that one is used for the detection output terminal of output voltage testing result.
3. battery detection circuit as claimed in claim 2, it is characterized in that: this switch element also comprises one first triode and one first resistance, this detecting unit also comprises one second triode, one second resistance, one first rheostat and one second rheostat, the base stage of this first triode is connected to this control end by this first resistance, its emitter applies cell voltage, its collector is successively by this first rheostat and this second rheostat ground connection, the base stage of this second triode is connected to the node between this first rheostat and this second rheostat, its grounded emitter, its collector are connected to this detection output terminal and are connected to the collector of this first triode by this second resistance.
4. battery detection circuit as claimed in claim 3 is characterized in that: this first triode is the positive-negative-positive triode, and this second triode is a NPN type triode.
5. battery detection circuit as claimed in claim 4 is characterized in that: this first rheostat and this second rheostatic access resistance value satisfy makes the base stage of this second triode and emission voltage across poles be in critical voltage.
6. a device is characterized in that: comprise arbitrary described battery detection circuit among the aforesaid right requirement 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202041528U CN201754176U (en) | 2009-08-28 | 2009-08-28 | Battery detection circuit and device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202041528U CN201754176U (en) | 2009-08-28 | 2009-08-28 | Battery detection circuit and device thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201754176U true CN201754176U (en) | 2011-03-02 |
Family
ID=43621909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202041528U Expired - Fee Related CN201754176U (en) | 2009-08-28 | 2009-08-28 | Battery detection circuit and device thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201754176U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108124465A (en) * | 2017-04-17 | 2018-06-05 | 深圳和而泰智能控制股份有限公司 | A kind of monitoring and control method and system of battery load capacity |
| CN110850308A (en) * | 2019-11-25 | 2020-02-28 | 中国船舶重工集团公司第七一六研究所 | Battery state detection system and method |
-
2009
- 2009-08-28 CN CN2009202041528U patent/CN201754176U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108124465A (en) * | 2017-04-17 | 2018-06-05 | 深圳和而泰智能控制股份有限公司 | A kind of monitoring and control method and system of battery load capacity |
| CN108124465B (en) * | 2017-04-17 | 2019-12-20 | 深圳和而泰智能控制股份有限公司 | Monitoring control method and system for battery loading capacity |
| CN110850308A (en) * | 2019-11-25 | 2020-02-28 | 中国船舶重工集团公司第七一六研究所 | Battery state detection system and method |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110302 Termination date: 20170828 |