CN105445596A - Battery detection circuit - Google Patents
Battery detection circuit Download PDFInfo
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- CN105445596A CN105445596A CN201410403229.XA CN201410403229A CN105445596A CN 105445596 A CN105445596 A CN 105445596A CN 201410403229 A CN201410403229 A CN 201410403229A CN 105445596 A CN105445596 A CN 105445596A
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- 238000001514 detection method Methods 0.000 title claims abstract description 32
- 230000000087 stabilizing effect Effects 0.000 claims description 2
- 230000005669 field effect Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000003213 activating effect Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
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Abstract
A battery detection circuit includes: a power supply having a positive electrode and a negative electrode which is connected to the ground; a detection unit having a positive detection end and a negative detection end, wherein the positive detection end is connected with a positive electrode of a battery to be detected, and the negative detection end is connected with a negative electrode of a battery to be detected; a stable voltage providing unit which provides a stable voltage value; a comparison unit which is connected with the detection unit and the stable voltage providing unit and compares a voltage value of the detection unit with the stable voltage value of the stable voltage providing unit; and a display unit which is connected with the comparison unit and displays a result after comparison of the comparison unit. The battery detection circuit provided by the invention tests the voltage of the battery after assembling, then compares the voltage with the stable voltage value through the comparison unit, and displays the comparison result through the display unit, so as to judge whether the positive and negative electrodes are placed correctly when a battery core is assembled, thereby avoiding the problem that connection of positive and negative electrode of the battery core in reverse directions causes burnout of a field effect transistor on a circuit board.
Description
[technical field]
The present invention relates to a kind of battery detection circuit, and in particular to the battery detection circuit whether a kind of battery core positive and negative electrode direction detected in battery puts back.
[background technology]
Along with the progress of science and technology, electronic product is more and more widely used in family and office, and many electronic products all can use battery as power-supply device.
Battery is added protection circuit plate after normally being combined by several groups of battery cores and is assembled, and battery core refers to and generally directly do not use the single galvanochemistry battery core containing positive and negative electrode.If when assembled battery by anti-loaded for the positive and negative electrode direction of wherein one group of battery core; when activating whole battery after the positive and negative electrode having welded all battery cores; the power supply of external activation voltage can be in the right direction with positive and negative electrode several groups of battery cores form a new power supply, the field effect transistor on protection circuit plate can burn out by the big current of generation.
In view of this, be necessary to provide a kind of battery detection circuit, to solve the problem in fact.
[summary of the invention]
Therefore, the object of this invention is to provide a kind of battery detection circuit, connecing the anti-ballistic problem causing the field effect transistor on protection circuit plate and burn out with the positive and negative electrode direction solving the battery core when assembling.
In order to achieve the above object, battery detection circuit of the present invention, it comprises:
Power supply, it has positive pole and negative pole, described minus earth;
Detecting unit, it has positive test side and negative test side, and described positive test side is connected with the positive pole of mesuring battary, and described negative test side is connected with the negative pole of mesuring battary;
Burning voltage providing unit, it provides stable voltage;
Comparing unit, it connects described detecting unit and burning voltage providing unit, the magnitude of voltage of more described detecting unit and the stable voltage of burning voltage providing unit;
Display unit, it is connected with comparing unit, display comparing unit relatively after result.
Compared to prior art; battery detection circuit of the present invention; by the voltage of battery after test assembling; then compared with a stable voltage by comparing unit; the result compared is shown by display unit; judge whether battery core positive and negative electrode when assembling is put correctly, and the positive and negative electrode direction avoiding the battery core when assembling connects the anti-ballistic problem causing the field effect transistor on protection circuit plate and burn out with this.
[accompanying drawing explanation]
Fig. 1 illustrates the block diagram of battery detection circuit of the present invention.
Fig. 2 illustrates the circuit diagram of battery detection circuit one of the present invention preferred embodiment.
[embodiment]
Refer to shown in Fig. 1 and Fig. 2, wherein Fig. 1 depicts the block diagram of battery detection circuit of the present invention, and Fig. 2 depicts the circuit diagram of battery detection circuit one of the present invention preferred embodiment.
In the present embodiment, battery detection circuit of the present invention, it comprises: power supply 100, detecting unit 200, burning voltage providing unit 300, comparing unit 400 and display unit 500.
Described power supply 100 has positive pole 101 and negative pole, described minus earth 102.
Described detecting unit 200, there is positive test side 201 and negative test side 202, described positive test side 201 is connected with the positive pole of mesuring battary, described negative test side 202 is connected with the negative pole of mesuring battary, described detecting unit 200 also comprises the first resistance 203, second resistance 204 and the 3rd resistance 205, one end of first resistance 203 connects described positive test side 201, one end of second resistance 204 connects the other end of described first resistance 204, the other end of the second resistance 204 connects described negative test side 202, one end of 3rd resistance 205 connects described positive test side 201, the other end of the 3rd resistance 205 connects described burning voltage providing unit 300.
Described burning voltage providing unit 300, it provides stable voltage, described burning voltage providing unit 300 can be adjustable voltage stabilizing triode, and according to the numerical value of the group number determination stable voltage of battery core in described battery, the magnitude of voltage such as often organizing battery core is 4.2V, first resistance is 10 Ω, second resistance is 3 Ω, and when for two groups of battery cores, described stable voltage can be set to 5V, when for three groups or four groups of battery cores, described stable voltage can be set to 9V.
Described comparing unit 400, it connects described detecting unit 200 and burning voltage providing unit 300, the magnitude of voltage of more described detecting unit 200 and the stable voltage of burning voltage providing unit 300, and wherein said comparing unit 400 comprises:
First comparer 401, it has the first normal phase input end, first inverting input, first feeder ear, first earth terminal and the first output terminal, described first normal phase input end connects the other end of described first resistance 203, described first inverting input connects described burning voltage providing unit 300, described first feeder ear connects positive test side 201 by ON resistance 404, described first earth terminal connects described negative test side 202, wherein, when the acting as of described ON resistance 404 prevents whole battery from putting into detecting unit 200 just, negative pole connects instead, described ON resistance 404 and by one the 9th resistance 409 ground connection,
Photoelectrical coupler 405, it has the first light emitting diode 4051 and phototriode 4052, the positive pole of described first light emitting diode 4051 connects the output terminal of described first comparer 401, the negative pole of described light emitting diode 4051 connects described negative test side 202, and the emitter of described phototriode 4052 is by reset switch 410 ground connection 102;
Second comparer 402, it has the second normal phase input end, the second inverting input, the second feeder ear, the second earth terminal and the second output terminal, described second normal phase input end connects the collector of described phototriode 4052, and described second feeder ear connects the positive pole 101 of described power supply 100;
3rd comparer 403, it has the 3rd normal phase input end, the 3rd inverting input, the 3rd feeder ear, the 3rd earth terminal and the 3rd output terminal, described 3rd normal phase input end connects the collector of described phototriode 4052, described 3rd inverting input is connected with the second inverting input, and described 3rd feeder ear connects the positive pole 101 of described power supply 100;
4th resistance 406, its one end connects the positive pole 101 of power supply 100, and the other end connects the collector of phototriode 4052;
5th resistance 407, its one end connects the positive pole 101 of power supply 100, and the other end connects the 3rd inverting input of described 3rd comparer 403;
6th resistance 408, its one end connects the 3rd inverting input of described 3rd comparer 403, and the other end is by described reset switch 410 ground connection 102.
Described display unit 500, it is connected with comparing unit 400, display comparing unit 400 relatively after result, described display unit 500 comprises:
Second light emitting diode 501, its positive pole connects the positive pole 101 of described power supply 100 by one the 7th resistance 506, and described light emitting diode 501 glows, and described second light emitting diode 501 can a hummer 502 in parallel;
NPN triode 503, its base stage connects the 3rd output terminal of described 3rd comparer 403, and its collector connects the negative pole of the second light emitting diode 501, and its emitter is by described reset switch 410 ground connection 102;
3rd light emitting diode 504, its positive pole connects the positive pole 101 of described power supply 100 by one the 8th resistance 507, described 3rd light emitting diode 504 green light;
PNP triode 505, its base stage connects the second output terminal of described second comparer 402, and its collector connects the negative pole of the 3rd light emitting diode 504, its grounded emitter 102.
When testing, the positive pole of the battery after assembling is connected positive test side 201, the negative pole of battery connects negative test side 202; Compared with stable voltage by the magnitude of voltage that the normal phase input end of the first comparer 401 obtains, if the magnitude of voltage of the first positive input is greater than stable voltage, then the first comparer 401 exports as high level; The electric signal of high level is sent into the input end of photoelectrical coupler 405 by the first comparer 401, and the first light emitting diode 4051 is shinny, phototriode 4052 conducting, and photoelectrical coupler 405 exports as low level; Now the second comparer 402 and the 3rd comparer 403 export as low level, and NPN triode 503 ends, and the second light emitting diode 501 does not work, hummer 502 is not reported to the police, and PNP triode 505 conducting, the 3rd light emitting diode 504 green light, the assembling of display battery core is correct.
If the magnitude of voltage of the first positive input is less than stable voltage, then the first comparer 401 exports as low level; Low level electric signal is sent into the input end of photoelectrical coupler 405 by the first comparer 401, and the first light emitting diode 4051 does not work, and phototriode 4052 ends, and photoelectrical coupler 405 exports as high level; Now the second comparer 402 and the 3rd comparer 403 export as high level, now PNP triode 505 is ended, 3rd light emitting diode 504 does not work, and NPN triode 503 conducting, second light emitting diode 501 glows, and hummer 502 is reported to the police, the assembling of display battery core is incorrect, needs again to be put correctly by the battery core positive and negative electrode in battery.
Battery detection circuit of the present invention; by the voltage of the battery after test assembling; then compared with a stable voltage by comparing unit 400; the result compared is shown by display unit 500; if the positive and negative electrode of battery core is put correctly in battery; then give a green light; if put incorrect; then to send out a warning and hummer 502 is reported to the police; judge whether battery core puts correct when assembling, the positive and negative electrode direction avoiding the battery core when assembling connects the anti-ballistic problem causing the field effect transistor on protection circuit plate and burn with this.
Claims (8)
1. a battery detection circuit, is characterized in that, described battery detection circuit comprises:
Power supply, it has positive pole and negative pole, described minus earth;
Detecting unit, it has positive test side and negative test side, and described positive test side is connected with the positive pole of mesuring battary, and described negative test side is connected with the negative pole of mesuring battary;
Burning voltage providing unit, it provides stable voltage;
Comparing unit, it connects described detecting unit and burning voltage providing unit, the magnitude of voltage of more described detecting unit and the stable voltage of burning voltage providing unit;
Display unit, it is connected with comparing unit, display comparing unit relatively after result.
2. battery detection circuit as claimed in claim 1, it is characterized in that, described burning voltage providing unit is adjustable voltage stabilizing triode.
3. battery detection circuit as claimed in claim 1, it is characterized in that, described detecting unit also comprises:
First resistance, its one end connects described positive test side;
Second resistance, its one end connects the other end of described first resistance, and the other end connects described negative test side;
3rd resistance, its one end connects described positive test side, and the other end connects described burning voltage providing unit.
4. battery detection circuit as claimed in claim 3, it is characterized in that, described comparing unit comprises:
First comparer, it has the first normal phase input end, the first inverting input, the first feeder ear, the first earth terminal and the first output terminal, described first normal phase input end connects the other end of described first resistance, described first inverting input connects described burning voltage providing unit, described first feeder ear connects positive test side by ON resistance, and described first earth terminal connects described negative test side;
Photoelectrical coupler, it has the first light emitting diode and phototriode, the positive pole of described first light emitting diode connects the output terminal of described first comparer, and the negative pole of described first light emitting diode connects described negative test side, and the emitter of described phototriode is by a reset switch ground connection;
Second comparer, it has the second normal phase input end, the second inverting input, the second feeder ear, the second earth terminal and the second output terminal, described second normal phase input end connects the collector of described phototriode, and described second feeder ear connects the positive pole of described power supply;
3rd comparer, it has the 3rd normal phase input end, the 3rd inverting input, the 3rd feeder ear, the 3rd earth terminal and the 3rd output terminal, described 3rd normal phase input end connects the collector of described phototriode, described 3rd inverting input is connected with the second inverting input, and described 3rd feeder ear connects the positive pole of described power supply;
4th resistance, its one end connects the positive pole of power supply, and the other end connects the collector of phototriode;
5th resistance, its one end connects the positive pole of power supply, and the other end connects the 3rd inverting input of described 3rd comparer;
6th resistance, its one end connects the 3rd inverting input of described 3rd comparer, and the other end is by described reset switch ground connection.
5. battery detection circuit as claimed in claim 4, it is characterized in that, described display unit comprises:
Second light emitting diode, its positive pole connects described positive source by one the 7th resistance;
NPN triode, its base stage connects the 3rd output terminal of described 3rd comparer, and its collector connects the negative pole of the second light emitting diode, and its emitter is by described reset switch ground connection;
3rd light emitting diode, its positive pole connects described positive source by one the 8th resistance;
PNP triode, its base stage connects the second output terminal of described second comparer, and its collector connects the negative pole of the 3rd light emitting diode, its grounded emitter.
6. battery detection circuit as claimed in claim 5, is characterized in that, described second light emitting diode green light.
7. battery detection circuit as claimed in claim 6, it is characterized in that, described second light emitting diode is parallel with hummer.
8. battery detection circuit as claimed in claim 5, it is characterized in that, described 3rd light emitting diode glows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410403229.XA CN105445596B (en) | 2014-08-15 | 2014-08-15 | Battery detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410403229.XA CN105445596B (en) | 2014-08-15 | 2014-08-15 | Battery detection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105445596A true CN105445596A (en) | 2016-03-30 |
| CN105445596B CN105445596B (en) | 2019-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410403229.XA Expired - Fee Related CN105445596B (en) | 2014-08-15 | 2014-08-15 | Battery detection circuit |
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| CN (1) | CN105445596B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106488659A (en) * | 2016-12-22 | 2017-03-08 | 重庆淳祥电子科技有限公司 | Keyboard circuit printer with resist printing deinstall |
| CN109142869A (en) * | 2017-06-13 | 2019-01-04 | 神讯电脑(昆山)有限公司 | Impedance test device |
| CN109791174A (en) * | 2016-08-11 | 2019-05-21 | Lg伊诺特有限公司 | Circuit fault detector, electric vehicle charging controller and fault detection method including it |
| CN111505537A (en) * | 2020-04-24 | 2020-08-07 | 上海电气集团股份有限公司 | Detection circuit for wiring sequence of lithium ion battery pack |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109791174A (en) * | 2016-08-11 | 2019-05-21 | Lg伊诺特有限公司 | Circuit fault detector, electric vehicle charging controller and fault detection method including it |
| CN106488659A (en) * | 2016-12-22 | 2017-03-08 | 重庆淳祥电子科技有限公司 | Keyboard circuit printer with resist printing deinstall |
| CN109142869A (en) * | 2017-06-13 | 2019-01-04 | 神讯电脑(昆山)有限公司 | Impedance test device |
| CN111505537A (en) * | 2020-04-24 | 2020-08-07 | 上海电气集团股份有限公司 | Detection circuit for wiring sequence of lithium ion battery pack |
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| Publication number | Publication date |
|---|---|
| CN105445596B (en) | 2019-01-11 |
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Granted publication date: 20190111 |