CN205027882U - Battery cell's voltage diagnosis collection system - Google Patents
Battery cell's voltage diagnosis collection system Download PDFInfo
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- CN205027882U CN205027882U CN201520762985.1U CN201520762985U CN205027882U CN 205027882 U CN205027882 U CN 205027882U CN 201520762985 U CN201520762985 U CN 201520762985U CN 205027882 U CN205027882 U CN 205027882U
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- switch
- output terminal
- voltage
- control unit
- mcu
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model provides a battery cell's voltage diagnosis collection system, include: electric the control unit and MCU on first resistance, second resistance, multiway switch, voltage follower, ADC acquisition unit, first electric the control unit, the second. MCU passes through ADC acquisition unit carries out voltage acquisition to battery cell, MCU passes through first in contact with electricity system unit with electric the control unit goes up electric control detection on the second, MCU relatively ADC acquisition unit's output voltage confirms the diagnosis result and reports. The utility model discloses avoided when battery cell's voltage acquisition thread -break line, battery management system detects battery cell's the inaccurate problem of voltage, ensures the operation of the safe and reliable of group battery system, improves life and economic benefits.
Description
Technical field
The utility model relates to the voltage detecting field of batteries of electric automobile, particularly relates to the voltage diagnostic acquisition system of cell.
Background technology
Battery pack system is one of core technology of electric automobile, the major function of electric battery realizes the energy supply of electric battery to car load, and mainly rely on battery management system to realize to the monitoring of the battery state in electric battery, be a kind of important means of condition monitoring to the voltage signal acquisition of cell.In electric automobile whole service operating mode, no matter battery pack system is be in charged state, or in traveling discharge condition, all need to carry out real-tune TT & C to the voltage of each cell in electric battery, the voltage of the effective administration battery pack of battery management system ability exports, avoid cell to be in over-discharge state, thus reduce the serviceable life of cell, the combination property of whole battery pack system is failed.When voltage acquisition line in order to avoid cell breaks, the monomer voltage that battery management system detects is inaccurate, therefore must each monomer battery voltage gathering line be detected service-strong detection means, guarantee battery pack system safe and reliable operation, improve serviceable life and the economic benefit of electric battery.
Utility model content
The utility model provides a kind of voltage diagnostic acquisition system of cell, there is monomer voltage and gather inaccurate problem when solving the voltage acquisition line broken string of cell.
For achieving the above object, the utility model provides following technical scheme:
A voltage diagnostic acquisition system for cell, comprising: electric control unit and MCU on electric control unit, second on the first resistance, the second resistance, multi-way switch, voltage follower, ADC collecting unit, first;
Described one end of first resistance is connected with the positive pole of cell, and the other end of described first resistance is connected with the output terminal of electric control unit on the first input end of described multi-way switch and described first;
Described one end of second resistance is connected with the negative pole of cell, and the other end of described second resistance is connected with the output terminal of electric control unit on the second input end of described multi-way switch and described second;
The positive input of described voltage follower is connected with the first output terminal of described multi-way switch, the reverse input end of described voltage follower is connected with the second output terminal of described multi-way switch, and the output terminal of described voltage follower is connected with the input end of described ADC collecting unit;
The input end of described MCU is connected with the output terminal of described ADC collecting unit, and first output terminal of described MCU is connected with the control end of electric control unit on described first, and second output terminal of described MCU is connected with the control end of electric control unit on described second;
When first output terminal of described MCU or the second output terminal are high level, described MCU is for obtaining the output voltage of described ADC collecting unit and reporting;
When first output terminal of described MCU or the second output terminal are low level, on described first, on electric control unit or second, electric control unit carries out upper electro-detection, and the output voltage of the more described ADC collecting unit of described MCU, determines diagnostic result and report.
Preferably, described multi-way switch comprises: the first switch, second switch, the 3rd switch and the 4th switch;
One end of described first switch is connected with one end of described 3rd switch, and as the first input end of described multi-way switch, one end of described second switch is connected with one end of described 4th switch, as the second input end of described multi-way switch;
The other end of described first switch is connected with the other end of described second switch, and as the first output terminal of described multi-way switch, the other end of described 3rd switch and the described 4th is opened
The other end closed is connected, as the second output terminal of described multi-way switch.
Preferably, when described MCU first output terminal is low level, described first switch and described 4th switch are in closure state, and described second switch and described 3rd switch are in off-state;
When described MCU second output terminal is low level, described first switch and described 4th switch are in off-state, and described second switch and described 3rd switch are in closure state.
Preferably, described first switch and described 4th switch are normally closed switch, and described second switch and described 3rd switch are normal open switch.
Preferably, electric control unit comprises on described first: the first metal-oxide-semiconductor and the first pull-up resistor;
Described first metal-oxide-semiconductor is PMOS, the grid of described first metal-oxide-semiconductor is the control end of electric control unit on described first, the source electrode of described first metal-oxide-semiconductor is connected with 5V power supply, the drain electrode of described first metal-oxide-semiconductor is connected with one end of described first pull-up resistor, and the other end of described first pull-up resistor is the output terminal of electric control unit on described first.
Preferably, electric control unit comprises on described second: the second metal-oxide-semiconductor and the second pull-up resistor;
Described second metal-oxide-semiconductor is PMOS, the grid of described second metal-oxide-semiconductor is the control end of electric control unit on described second, the source electrode of described second metal-oxide-semiconductor is connected with 5V power supply, the drain electrode of described second metal-oxide-semiconductor is connected with one end of described second pull-up resistor, and the other end of described second pull-up resistor is the output terminal of electric control unit on described second.
Preferably, if the output voltage of described ADC collecting unit equals 5V, described MCU judges that the voltage detecting system of described cell exists disconnection fault, and described MCU reporting fault information is to battery management system.
The utility model provides a kind of voltage diagnostic acquisition system of cell, in employing, electric control carries out burn out detection to the System of voltage acquisition of cell, and report testing result, when avoiding the voltage acquisition line broken string when cell, battery management system detects the inaccurate problem of voltage of cell, guarantee battery pack system safe and reliable operation, improve serviceable life and the economic benefit of electric battery.
Accompanying drawing explanation
In order to be illustrated more clearly in specific embodiment of the utility model, be briefly described to the accompanying drawing used required in embodiment below.
Fig. 1: the voltage diagnostic acquisition system structural representation being a kind of cell that the utility model provides;
Fig. 2: be a kind of multi-way switch structural representation that the utility model provides;
Fig. 3: the voltage diagnostic acquisition system circuit diagram being a kind of cell that the utility model embodiment provides;
Fig. 4: be the MCU workflow schematic diagram that the utility model embodiment provides.
Embodiment
In order to the scheme making those skilled in the art person understand the utility model embodiment better, below in conjunction with drawings and embodiments, the utility model embodiment is described in further detail.
Battery pack system for electric automobile in prior art only rests on the acquisition technique to voltage to the voltage detecting of cell, lack the self-diagnostic function of hardware circuit and Software for Design, on-line monitoring can not be realized to hardware circuit actual working state, there is monomer voltage and gather inaccurate possibility.The utility model provides a kind of voltage diagnostic acquisition system of cell, there is voltage detecting inaccurate problem when open circuit appears in the System of voltage acquisition solving existing cell.
As shown in Figure 1, the voltage diagnostic acquisition system structural representation of a kind of cell provided for the utility model.Comprise: electric control unit and MCU on electric control unit, second on the first resistance R1, the second resistance R2, multi-way switch, voltage follower, ADC collecting unit, first.
One end of described first resistance R1 is connected with the positive pole of cell, and the described other end of the first resistance R1 is connected with the output terminal of electric control unit on the first input end of described multi-way switch and described first.
One end of described second resistance R2 is connected with the negative pole of cell, and the described other end of the second resistance R2 is connected with the output terminal of electric control unit on the second input end of described multi-way switch and described second.
The positive input of described voltage follower is connected with the first output terminal of described multi-way switch, the reverse input end of described voltage follower is connected with the second output terminal of described multi-way switch, and the output terminal of described voltage follower is connected with the input end of described ADC collecting unit.
The input end of described MCU is connected with the output terminal of described ADC collecting unit, and first output terminal of described MCU is connected with the control end of electric control unit on described first, and second output terminal of described MCU is connected with the control end of electric control unit on described second.
When first output terminal of described MCU or the second output terminal are high level, described MCU is for obtaining the output voltage of described ADC collecting unit and reporting.When first output terminal of described MCU or the second output terminal are low level, on described first, on electric control unit or second, electric control unit carries out upper electro-detection, and the output voltage of the more described ADC collecting unit of described MCU, determines diagnostic result and report.
As shown in Figure 2, be a kind of multi-way switch structural representation that the utility model provides.Described multi-way switch comprises: the first K switch 1, second switch K2, the 3rd K switch 3 and the 4th K switch 4.
One end of described first K switch 1 is connected with one end of described 3rd K switch 3, and as the first input end of described multi-way switch, one end of described second switch K2 is connected with one end of described 4th K switch 4, as the second input end of described multi-way switch.
The other end of described first K switch 1 is connected with the other end of described second switch K2, and as the first output terminal of described multi-way switch, the other end of described 3rd switch is connected with the other end of described 4th switch, as the second output terminal of described multi-way switch.
Further, when described MCU first output terminal is low level, described first K switch 1 and described 4th K switch 4 are in closure state, and described second switch K2 and described 3rd K switch 3 are in off-state.
When described MCU second output terminal is low level, described first K switch 1 and described 4th K switch 4 are in off-state, and described second switch K2 and described 3rd K switch 3 are in closure state.
Further, described first K switch 1 and described 4th K switch 4 are normally closed switch, and described second switch K2 and described 3rd K switch 3 are normal open switch.
As shown in Figure 3, the voltage diagnostic acquisition system circuit diagram of a kind of cell provided for the utility model embodiment.On described first, electric control unit comprises: the first metal-oxide-semiconductor Q1 and the first pull-up resistor R3.
Described first metal-oxide-semiconductor Q1 is PMOS, the grid of described first metal-oxide-semiconductor Q1 is the control end of electric control unit on described first, the source electrode of described first metal-oxide-semiconductor Q1 is connected with 5V power supply, the drain electrode of described first metal-oxide-semiconductor Q1 is connected with one end of described first pull-up resistor R3, and the other end of described first pull-up resistor R3 is the output terminal of electric control unit on described first.
Further, electric control unit comprises on described second: the second metal-oxide-semiconductor Q2 and the second pull-up resistor R4.
Described second metal-oxide-semiconductor Q2 is PMOS, the grid of described second metal-oxide-semiconductor Q2 is the control end of electric control unit on described second, the source electrode of described second metal-oxide-semiconductor Q2 is connected with 5V power supply, the drain electrode of described second metal-oxide-semiconductor Q2 is connected with one end of described second pull-up resistor R4, and the other end of described second pull-up resistor R4 is the output terminal of electric control unit on described second.
Further, if the output voltage of described ADC collecting unit equals 5V, described MCU judges that the voltage diagnostic acquisition system of described cell exists disconnection fault, and described MCU reporting fault information is to battery management system.
Concrete, as shown in Figure 4, be the MCU workflow schematic diagram that the utility model embodiment provides, comprise following steps:
S1: judge that whether initialization completes MCU, if so, then performs S2;
S2:MCU output low level gives upper electric control unit, electro-detection in the voltage diagnostic acquisition system making cell, after complete, performs S3;
After S3:MCU reads the data of ADC collecting unit output, perform S4;
S4:MCU judges whether the data AD1 that ADC collecting unit exports equals 5V, if so, then performs S10, otherwise performs S5;
S5:MCU exports high level to upper electric control unit, makes the voltage diagnostic acquisition system of cell disconnect upper electro-detection, after complete, performs S6;
After S6:MCU reads the data of ADC collecting unit output, perform S7;
The data that S7:MCU exports according to ADC collecting unit, after determining the magnitude of voltage of battery, perform S8;
S8:MCU reports the magnitude of voltage of battery to after battery management system, performs S9;
S9:MCU judges that whether the magnitude of voltage of battery is normal, if abnormal, then performs S2, otherwise performs S6 or end;
After S10:MCU determines that the voltage diagnostic acquisition system of cell exists disconnection fault, perform S11;
S11:MCU reporting fault information to after battery management system, end operation.
Visible, the utility model provides a kind of voltage diagnostic acquisition system of cell, detected by upper electric control, judge whether the voltage diagnostic acquisition system of cell exists disconnection fault, and reporting fault information, solve the self-diagnostic function lacking hardware circuit and Software for Design in the System of voltage acquisition of existing cell, the on-line monitoring to hardware circuit actual working state can be realized, when avoiding the voltage acquisition line broken string when cell, the inaccurate problem of monomer voltage that battery management system detects, guarantee battery pack system safe and reliable operation, improve serviceable life and the economic benefit of electric battery.
Structure of the present utility model, feature and action effect is described in detail above according to the embodiment shown in diagram; the foregoing is only preferred embodiment of the present utility model; but the utility model does not limit practical range with shown in drawing; every change done according to conception of the present utility model; or be revised as the Equivalent embodiments of equivalent variations; do not exceed yet instructions with diagram contain spiritual time, all should in protection domain of the present utility model.
Claims (7)
1. a voltage diagnostic acquisition system for cell, is characterized in that, comprising: electric control unit and MCU on electric control unit, second on the first resistance, the second resistance, multi-way switch, voltage follower, ADC collecting unit, first;
Described one end of first resistance is connected with the positive pole of cell, and the other end of described first resistance is connected with the output terminal of electric control unit on the first input end of described multi-way switch and described first;
Described one end of second resistance is connected with the negative pole of cell, and the other end of described second resistance is connected with the output terminal of electric control unit on the second input end of described multi-way switch and described second;
The positive input of described voltage follower is connected with the first output terminal of described multi-way switch, the reverse input end of described voltage follower is connected with the second output terminal of described multi-way switch, and the output terminal of described voltage follower is connected with the input end of described ADC collecting unit;
The input end of described MCU is connected with the output terminal of described ADC collecting unit, and first output terminal of described MCU is connected with the control end of electric control unit on described first, and second output terminal of described MCU is connected with the control end of electric control unit on described second;
When first output terminal of described MCU or the second output terminal are high level, described MCU is for obtaining the output voltage of described ADC collecting unit and reporting;
When first output terminal of described MCU or the second output terminal are low level, on described first, on electric control unit or second, electric control unit carries out upper electro-detection, and the output voltage of the more described ADC collecting unit of described MCU, determines diagnostic result and report.
2. the voltage diagnostic acquisition system of cell according to claim 1, it is characterized in that, described multi-way switch comprises: the first switch, second switch, the 3rd switch and the 4th switch;
One end of described first switch is connected with one end of described 3rd switch, and as the first input end of described multi-way switch, one end of described second switch is connected with one end of described 4th switch, as the second input end of described multi-way switch;
The other end of described first switch is connected with the other end of described second switch, and as the first output terminal of described multi-way switch, the other end of described 3rd switch is connected with the other end of described 4th switch, as the second output terminal of described multi-way switch.
3. the voltage diagnostic acquisition system of cell according to claim 2, it is characterized in that, when described MCU first output terminal is low level, described first switch and described 4th switch are in closure state, and described second switch and described 3rd switch are in off-state;
When described MCU second output terminal is low level, described first switch and described 4th switch are in off-state, and described second switch and described 3rd switch are in closure state.
4. the voltage diagnostic acquisition system of cell according to claim 2, it is characterized in that, described first switch and described 4th switch are normally closed switch, and described second switch and described 3rd switch are normal open switch.
5. the voltage diagnostic acquisition system of cell according to claim 1, it is characterized in that, on described first, electric control unit comprises: the first metal-oxide-semiconductor and the first pull-up resistor;
Described first metal-oxide-semiconductor is PMOS, the grid of described first metal-oxide-semiconductor is the control end of electric control unit on described first, the source electrode of described first metal-oxide-semiconductor is connected with 5V power supply, the drain electrode of described first metal-oxide-semiconductor is connected with one end of described first pull-up resistor, and the other end of described first pull-up resistor is the output terminal of electric control unit on described first.
6. the voltage diagnostic acquisition system of cell according to claim 1, it is characterized in that, on described second, electric control unit comprises: the second metal-oxide-semiconductor and the second pull-up resistor;
Described second metal-oxide-semiconductor is PMOS, the grid of described second metal-oxide-semiconductor is the control end of electric control unit on described second, the source electrode of described second metal-oxide-semiconductor is connected with 5V power supply, the drain electrode of described second metal-oxide-semiconductor is connected with one end of described second pull-up resistor, and the other end of described second pull-up resistor is the output terminal of electric control unit on described second.
7. the voltage diagnostic acquisition system of cell according to claim 1, it is characterized in that, if the output voltage of described ADC collecting unit equals 5V, described MCU judges that the voltage detecting system of described cell exists disconnection fault, and described MCU reporting fault information is to battery management system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520762985.1U CN205027882U (en) | 2015-09-29 | 2015-09-29 | Battery cell's voltage diagnosis collection system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520762985.1U CN205027882U (en) | 2015-09-29 | 2015-09-29 | Battery cell's voltage diagnosis collection system |
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| CN205027882U true CN205027882U (en) | 2016-02-10 |
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| CN201520762985.1U Expired - Fee Related CN205027882U (en) | 2015-09-29 | 2015-09-29 | Battery cell's voltage diagnosis collection system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109491300A (en) * | 2018-12-26 | 2019-03-19 | 浙江中控技术股份有限公司 | A kind of output circuit and method of on-off model |
| CN111856332A (en) * | 2020-07-17 | 2020-10-30 | 力高(山东)新能源技术有限公司 | Circuit and method for detecting disconnection of shunt |
-
2015
- 2015-09-29 CN CN201520762985.1U patent/CN205027882U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109491300A (en) * | 2018-12-26 | 2019-03-19 | 浙江中控技术股份有限公司 | A kind of output circuit and method of on-off model |
| CN111856332A (en) * | 2020-07-17 | 2020-10-30 | 力高(山东)新能源技术有限公司 | Circuit and method for detecting disconnection of shunt |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 230601 Anhui Province, Hefei City Industrial Park, the Peach Blossom Road No. 669 Patentee after: Anhui Jianghuai Automobile Group Limited by Share Ltd Address before: 230601 Anhui Province, Hefei City Industrial Park, the Peach Blossom Road No. 669 Patentee before: Anhui Jianghuai Automotive Co., Ltd. |
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| 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: 20160210 Termination date: 20190929 |