CN111142051A - Serial line detection circuit and judgment method thereof - Google Patents
Serial line detection circuit and judgment method thereof Download PDFInfo
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- CN111142051A CN111142051A CN202010010361.XA CN202010010361A CN111142051A CN 111142051 A CN111142051 A CN 111142051A CN 202010010361 A CN202010010361 A CN 202010010361A CN 111142051 A CN111142051 A CN 111142051A
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Abstract
The invention provides a serial line detection circuit and a detection method thereof, wherein the serial line detection circuit comprises a first sampling circuit, a second sampling circuit and a third sampling circuit which are connected with the anode and the cathode of a power supply respectively; the first sampling circuit, the second sampling circuit and the third sampling circuit are arranged in parallel; the serial line detection circuit provided by the invention samples the voltages of the power line and the voltage line in a crossed manner so as to judge whether the voltage line is connected with the power line or not, so that the added devices are minimized, and the correspondingly added cost is low.
Description
Technical Field
The invention belongs to the technical field of circuit detection, and particularly relates to a serial line detection electrode and a judgment method thereof.
Background
At present, in the industry, whether the polarity of a voltage line or a power line is reversely connected or not is judged mainly through the voltage polarity of a detected sampling line and the power line, and under the condition of multi-channel output and consistent voltage of connected batteries, the error connection between channels cannot be judged, for example, a positive sampling line and a power line are connected to a first group of batteries, and a negative sampling line and a positive sampling line and a power line are connected to a second group of batteries.
In the prior art, a four-wire connection method is adopted to avoid voltage drop on a power wire. As shown in fig. 1, the battery pack includes a first voltage line 10 and a first power line 30 connected to a positive electrode of a battery 100, a second voltage line 20 and a second power line 40 connected to a negative electrode of the battery 100, a first resistor R1 connected to the first voltage line 10, a second resistor R2 connected to the second voltage line 20, a third resistor R3 connected to the first power line 30, a fourth resistor R4 connected to the second power line 40, a first operational amplifier 50 connected to the first resistor R1 and the second resistor R2, and a second operational amplifier 60 connected to the third resistor R3 and the fourth resistor R4. The first voltage line 10, the second voltage line 20, the first resistor R1, the second resistor R2 and the first operational amplifier 50 constitute a string detection circuit of the voltage lines, and the voltage of the battery 100 after passing through the first resistor R1 and the second resistor R2 is V1; the first power line 30, the second power line 40, the third resistor R3, the fourth resistor R4 and the second operational amplifier 60 constitute a string detection circuit of the power lines, and the voltage of the battery 100 after passing through the third resistor R3 and the fourth resistor R4 is V2.
Disclosure of Invention
The invention aims to provide a serial line detection circuit and a detection method thereof for judging whether a voltage line and a power line are connected.
The invention provides a serial line detection circuit, which comprises a first sampling circuit, a second sampling circuit and a third sampling circuit, wherein the first sampling circuit, the second sampling circuit and the third sampling circuit are connected with the positive pole and the negative pole of a power supply; the first sampling circuit, the second sampling circuit and the third sampling circuit are arranged in parallel; wherein the content of the first and second substances,
the first sampling circuit comprises a first voltage line and a second voltage line which are respectively connected with the anode and the cathode of the power supply, a first resistor connected with the first voltage line, a second resistor connected with the second voltage line and a first operational amplifier connected with the first resistor and the second resistor;
the second sampling circuit comprises a first positive power line and a second negative voltage line which are respectively connected with the positive pole and the negative pole of the power supply, a third resistor connected with the first positive power line, a fourth resistor connected with the second negative voltage line and a second operational amplifier connected with the third resistor and the fourth resistor;
the third sampling circuit comprises a second positive voltage wire and a first negative power wire which are respectively connected with the positive electrode and the negative electrode of the power supply, a fifth resistor connected with the second positive voltage wire, a sixth resistor connected with the first negative power wire and a third operational amplifier connected with the fifth resistor and the sixth resistor.
Preferably, the first resistor and the second resistor are respectively connected with the positive input end and the negative input end of the first operational amplifier; the third resistor and the fourth resistor are respectively connected with the positive input end and the negative input end of the second operational amplifier; and the fifth resistor and the sixth resistor are respectively connected with the positive input end and the negative input end of the third operational amplifier.
Preferably, the power source is a battery.
Preferably, the equivalent resistors of the third resistor and the fourth resistor have different resistance values from the equivalent resistors of the fifth resistor and the sixth resistor.
The invention also provides a judging method of the serial line detection circuit, wherein the first sampling circuit is used for sampling the voltage between the anode and the cathode of the power supply and sending the first voltage after being reduced by the first resistor and the second resistor to the first operational amplifier for sampling; the second sampling circuit is used for sampling the voltage between the anode and the cathode of the power supply and sending the second voltage which is reduced by the third resistor and the fourth resistor to a second operational amplifier for sampling; the third sampling circuit is used for sampling the voltage between the anode and the cathode of the power supply and sending the third voltage after being subjected to voltage reduction through the fifth resistor and the sixth resistor to a third operational amplifier for sampling; the method is characterized by comprising the following steps: and the first voltage, the second voltage and the third voltage of the power supply after being respectively reduced by the corresponding resistors are sent to the corresponding operational amplifiers for sampling, and the voltage value of the power supply is calculated and restored according to the voltage value sampled by the corresponding operational amplifiers and the corresponding resistor proportion.
Preferably, when the voltage calculated by the second sampling circuit is equal to the voltage calculated by the first sampling circuit, it indicates that the first voltage line and the first positive power line are connected at the same point;
when the voltage calculated by the third sampling circuit is equal to the voltage calculated by the first sampling circuit, it is indicated that the second voltage line and the first negative power line are connected at the same point.
Preferably, the equivalent resistance of the first sampling circuit is the equivalent resistance of the first resistance and the second resistance; the equivalent resistance of the second sampling circuit is the equivalent resistance of the third resistance and the fourth resistance; the equivalent resistance of the third sampling circuit is the equivalent resistance of the fifth resistance and the sixth resistance.
The serial line detection circuit provided by the invention samples the voltages of the power line and the voltage line in a crossed manner so as to judge whether the voltage line is connected with the power line or not, so that the added devices are minimized, and the correspondingly added cost is low.
Drawings
The present invention will be further described in the following detailed description of preferred embodiments, which is to be read in connection with the accompanying drawings.
FIG. 1 is a schematic diagram of a conventional four-wire connection serial line detection circuit;
fig. 2 is a schematic structural diagram of a serial line detection circuit according to the present invention.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one".
The technical solution of the present invention is described in detail with specific examples below.
The invention provides a serial line detection circuit which is used for detecting the polarity of a voltage sampling line and a power line and detecting the serial line among channels in multi-channel battery detection equipment.
As shown in fig. 2, the serial line detection circuit is connected with the first sampling circuit, the second sampling circuit and the third sampling circuit which are connected with the positive pole and the negative pole of the power supply; the first sampling circuit, the second sampling circuit and the third sampling circuit are arranged in parallel.
The first sampling circuit includes a first voltage line 10 and a second voltage line 30 respectively connected to the positive electrode and the negative electrode of the power supply 100, a first resistor R1 connected to the first voltage line 10, a second resistor R2 connected to the second voltage line 30, and a first operational amplifier 70 connected to the first resistor R1 and the second resistor R2.
The second sampling circuit includes a first positive power line 20 and a second negative voltage line 60 connected to the positive and negative electrodes of the power supply 100, respectively, a third resistor R3 connected to the first positive power line 20, a fourth resistor R4 connected to the second negative voltage line 60, and a second operational amplifier 80 connected to the third resistor R3 and the fourth resistor R4.
The third sampling circuit includes a second positive voltage line 30 and a first negative power line 50 connected to the positive and negative electrodes of the power supply 100, respectively, a fifth resistor R5 connected to the second positive voltage line 30, a sixth resistor R6 connected to the first negative power line 50, and a third operational amplifier 90 connected to the fifth resistor R5 and the sixth resistor R6.
In the present embodiment, the power supply 100 is a battery. The equivalent resistors of the third resistor R3 and the fourth resistor R4 have different resistance values from the equivalent resistors of the fifth resistor R5 and the sixth resistor R6. The first resistor R1 and the second resistor R2 are respectively connected with the positive input end and the negative input end of the first operational amplifier 70; the third resistor R3 and the fourth resistor R4 are respectively connected with the positive input end and the negative input end of the second operational amplifier 80; the fifth resistor R5 and the sixth resistor R6 are connected to the positive input terminal and the negative input terminal of the third operational amplifier 90, respectively.
The first sampling circuit is used for sampling the voltage between the anode and the cathode of the power supply 100, and sending the first voltage V1 after being reduced by the first resistor R1 and the second resistor R2 to the first operational amplifier 70 for sampling; the second sampling circuit is used for sampling the voltage between the anode and the cathode of the power supply 100, and sending the second voltage V2 after being reduced by the third resistor R3 and the fourth resistor R4 to the second operational amplifier 80 for sampling; the third sampling circuit is used for sampling the voltage between the anode and the cathode of the power supply 100, and sending the third voltage V3 after being reduced by the fifth resistor R5 and the sixth resistor R6 to the third operational amplifier 90 for sampling.
The invention also discloses a judging method of the serial line detection circuit, which comprises the following steps: the voltage of the power supply 100 after passing through the equivalent resistance of the first sampling circuit (i.e., the equivalent resistance of the first resistor R1 and the second resistor R2) is the first voltage V1, the first voltage V1 is sent to the first operational amplifier 70 for sampling, and the voltage value of the power supply 100 is restored by calculating according to the voltage value sampled by the first operational amplifier 70 and the equivalent resistance of the first sampling circuit as: vbat 1; the voltage of the power supply 100 after passing through the equivalent resistor of the second sampling circuit (i.e., the equivalent resistor of the third resistor R3 and the equivalent resistor of the fourth resistor R4) is a second voltage V2, the second voltage V2 is sent to the second operational amplifier 80 for sampling, and the voltage value of the power supply 100 is reduced by calculating according to the voltage value sampled by the second operational amplifier 80 and the equivalent resistor of the second sampling circuit: vbat 2; the voltage of the power supply 100 after passing through the equivalent resistors of the third sampling circuit (i.e., the equivalent resistors of the fifth resistor R5 and the sixth resistor R6) is the third voltage V3, the third voltage V3 is sent to the third operational amplifier 90 for sampling, and the voltage value of the power supply 100 is reduced according to the voltage value sampled by the third operational amplifier 90 and the equivalent resistor of the third sampling circuit: vbat 3.
Considering the detection error, when Vbat1 is equal to Vbat2 (i.e., the voltage calculated by the second sampling circuit is equal to the voltage calculated by the first sampling circuit), it is explained that the first voltage line 10 and the first positive power line 20 are connected at the same point.
Considering the detection error, when Vbat1 is equal to Vbat3 (i.e., the voltage calculated by the third sampling circuit is equal to the voltage calculated by the first sampling circuit), it is explained that the second voltage line 40 and the first negative power line 50 are connected at the same point.
When the Vat2 ≠ Vbat3 (i.e., the voltage calculated by the third sampling circuit is equal to the voltage calculated by the second sampling circuit) after considering the detection error, it indicates that the voltage line and the power line between different channels are connected in series.
The serial line detection circuit provided by the invention samples the voltages of the power line and the voltage line in a crossed manner so as to judge whether the voltage line is connected with the power line or not, so that the added devices are minimized, and the correspondingly added cost is low.
It should be noted that the above embodiments can be freely combined as necessary. The above description is only a preferred embodiment of the present invention, but the present invention is not limited to the details of the above embodiment, and it should be noted that, for those skilled in the art, it is possible to make various modifications and alterations without departing from the principle of the present invention, and it should be understood that these modifications, alterations and equivalents should be regarded as the protection scope of the present invention.
Claims (7)
1. A serial line detection circuit is characterized by comprising a first sampling circuit, a second sampling circuit and a third sampling circuit which are connected with the positive pole and the negative pole of a power supply respectively; the first sampling circuit, the second sampling circuit and the third sampling circuit are arranged in parallel; wherein the content of the first and second substances,
the first sampling circuit comprises a first voltage line and a second voltage line which are respectively connected with the anode and the cathode of the power supply, a first resistor connected with the first voltage line, a second resistor connected with the second voltage line and a first operational amplifier connected with the first resistor and the second resistor;
the second sampling circuit comprises a first positive power line and a second negative voltage line which are respectively connected with the positive pole and the negative pole of the power supply, a third resistor connected with the first positive power line, a fourth resistor connected with the second negative voltage line and a second operational amplifier connected with the third resistor and the fourth resistor;
the third sampling circuit comprises a second positive voltage wire and a first negative power wire which are respectively connected with the positive electrode and the negative electrode of the power supply, a fifth resistor connected with the second positive voltage wire, a sixth resistor connected with the first negative power wire and a third operational amplifier connected with the fifth resistor and the sixth resistor.
2. The string detection circuit according to claim 1, wherein the first resistor and the second resistor are connected to a positive input terminal and a negative input terminal of the first operational amplifier, respectively; the third resistor and the fourth resistor are respectively connected with the positive input end and the negative input end of the second operational amplifier; and the fifth resistor and the sixth resistor are respectively connected with the positive input end and the negative input end of the third operational amplifier.
3. The string detection circuit according to claim 1, wherein the power source is a battery.
4. The string detection circuit according to claim 1, wherein the equivalent resistors of the third resistor and the fourth resistor have different resistance values from the equivalent resistors of the fifth resistor and the sixth resistor.
5. The method according to any one of claims 1 to 4, wherein the first sampling circuit is configured to sample a voltage between a positive electrode and a negative electrode of the power supply, and to supply the voltage, which is stepped down by the first resistor and the second resistor, to the first operational amplifier for sampling; the second sampling circuit is used for sampling the voltage between the anode and the cathode of the power supply and sending the second voltage which is reduced by the third resistor and the fourth resistor to a second operational amplifier for sampling; the third sampling circuit is used for sampling the voltage between the anode and the cathode of the power supply and sending the third voltage after being subjected to voltage reduction through the fifth resistor and the sixth resistor to a third operational amplifier for sampling; the method is characterized by comprising the following steps: and the first voltage, the second voltage and the third voltage of the power supply after being respectively reduced by the corresponding resistors are sent to the corresponding operational amplifiers for sampling, and the voltage value of the power supply is calculated and restored according to the voltage value sampled by the corresponding operational amplifiers and the corresponding resistor proportion.
6. The method for determining a string detection circuit according to claim 5, wherein: when the voltage calculated by the second sampling circuit is equal to the voltage calculated by the first sampling circuit, the first voltage line and the first positive power line are connected at the same point;
when the voltage calculated by the third sampling circuit is equal to the voltage calculated by the first sampling circuit, it is indicated that the second voltage line and the first negative power line are connected at the same point.
7. The method for determining a string detection circuit according to claim 5 or 6, wherein: the equivalent resistance of the first sampling circuit is the equivalent resistance of the first resistance and the second resistance; the equivalent resistance of the second sampling circuit is the equivalent resistance of the third resistance and the fourth resistance; the equivalent resistance of the third sampling circuit is the equivalent resistance of the fifth resistance and the sixth resistance.
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| CN202010010361.XA CN111142051A (en) | 2020-01-06 | 2020-01-06 | Serial line detection circuit and judgment method thereof |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104422818A (en) * | 2013-08-22 | 2015-03-18 | 株式会社电装 | Route switching circuit and voltage detection device |
| CN104821575A (en) * | 2015-05-19 | 2015-08-05 | 深圳市卓能新能源科技有限公司 | Anti-misconnection output circuit for series batteries |
| KR20160059803A (en) * | 2014-11-19 | 2016-05-27 | 현대오트론 주식회사 | Apparatus and method for detecting disconnection of wire in battery management system |
| CN106712166A (en) * | 2016-12-13 | 2017-05-24 | 深圳市盛弘电气股份有限公司 | Power station power automatic control method and system |
| CN106771834A (en) * | 2017-02-25 | 2017-05-31 | 华为技术有限公司 | A kind of many DC source input wires detecting systems and photovoltaic group string formula inverter system |
| JP2018013389A (en) * | 2016-07-20 | 2018-01-25 | 株式会社東芝 | Electric leakage detector and electric leakage detection method |
| CN107870283A (en) * | 2017-11-06 | 2018-04-03 | 山东谦恒电子科技有限公司 | BMS wiring testing devices and method |
| CN207636731U (en) * | 2017-11-16 | 2018-07-20 | 常州机电职业技术学院 | A kind of detection device of serial lithium battery group |
| CN108333464A (en) * | 2018-04-21 | 2018-07-27 | 国网湖北省电力有限公司荆门供电公司 | The quick verifying unit of cable core |
-
2020
- 2020-01-06 CN CN202010010361.XA patent/CN111142051A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104422818A (en) * | 2013-08-22 | 2015-03-18 | 株式会社电装 | Route switching circuit and voltage detection device |
| KR20160059803A (en) * | 2014-11-19 | 2016-05-27 | 현대오트론 주식회사 | Apparatus and method for detecting disconnection of wire in battery management system |
| CN104821575A (en) * | 2015-05-19 | 2015-08-05 | 深圳市卓能新能源科技有限公司 | Anti-misconnection output circuit for series batteries |
| JP2018013389A (en) * | 2016-07-20 | 2018-01-25 | 株式会社東芝 | Electric leakage detector and electric leakage detection method |
| CN106712166A (en) * | 2016-12-13 | 2017-05-24 | 深圳市盛弘电气股份有限公司 | Power station power automatic control method and system |
| CN106771834A (en) * | 2017-02-25 | 2017-05-31 | 华为技术有限公司 | A kind of many DC source input wires detecting systems and photovoltaic group string formula inverter system |
| CN107870283A (en) * | 2017-11-06 | 2018-04-03 | 山东谦恒电子科技有限公司 | BMS wiring testing devices and method |
| CN207636731U (en) * | 2017-11-16 | 2018-07-20 | 常州机电职业技术学院 | A kind of detection device of serial lithium battery group |
| CN108333464A (en) * | 2018-04-21 | 2018-07-27 | 国网湖北省电力有限公司荆门供电公司 | The quick verifying unit of cable core |
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Application publication date: 20200512 |