CN102680902B - Consistency on-line monitoring device and method for motive power battery pack for electric automobile - Google Patents
Consistency on-line monitoring device and method for motive power battery pack for electric automobile Download PDFInfo
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- CN102680902B CN102680902B CN201210145471.2A CN201210145471A CN102680902B CN 102680902 B CN102680902 B CN 102680902B CN 201210145471 A CN201210145471 A CN 201210145471A CN 102680902 B CN102680902 B CN 102680902B
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Abstract
The invention discloses a consistency on-line monitoring device and method for a motive power battery pack for an electric automobile, wherein the consistency on-line monitoring device for the motive power battery pack for the electric automobile comprises a singlechip, a voltage detection circuit, a current detection circuit, a temperature detection circuit and a signal processing circuit; the input end of the voltage detection circuit is connected with the I/O (input/output) port of the singlechip; the output end of the voltage detection circuit is connected with the signal processing circuit; the signal processing circuit is connected with the singlechip; and the current detection circuit and the temperature detection circuit are respectively connected with the singlechip through the signal processing circuit. According to the invention, the value quantization index of the battery pack consistency is obtained through performing data processing on the detected voltage, current and temperature data, the digital quantization of the battery pack consistency index is realized, the measurement is rapid and efficient, and the result is accurate and reliable.
Description
Technical field
The invention belongs to electric automobile applied technical field, be related specifically to a kind of Prospect of EVS Powered with Batteries group consistance on-Line Monitor Device and method.
Background technology
Along with the aggravation of energy crisis and environmental problem, the research of pure electric automobile and hybrid vehicle obtains the extensive concern of various countries.The monomer voltage of Prospect of EVS Powered with Batteries is generally at below 6V, and needing more piece cell to connect in practical application is that an electric battery is to reach required voltage.Automobile start and stop are in the process of moving frequent and operating mode is complicated, if the consistance of each cell is bad, the difference between each monomer can be strengthened in charge and discharge process, easily cause the mistake of partial monosomy battery to put or overcharge, and cause the cycle performance decay of power battery pack or lost efficacy.Therefore method and device with regard to needing a kind of cell to Prospect of EVS Powered with Batteries group to carry out consistance on-line monitoring.
Summary of the invention
By Given this, the object of this invention is to provide a kind of Prospect of EVS Powered with Batteries group consistance on-Line Monitor Device and method, by carrying out the numerical quantization index that data processing obtains consistency of battery pack to the voltage detected, electric current and temperature data, achieve the digital quantization of consistency of battery pack index, measure rapidly and efficiently, result accurately and reliably.
To achieve these goals, the present invention is by the following technical solutions:
A kind of Prospect of EVS Powered with Batteries group consistance on-Line Monitor Device, wherein, described Prospect of EVS Powered with Batteries group consistance on-Line Monitor Device comprises single-chip microcomputer, voltage detecting circuit, current detection circuit, temperature sensing circuit and signal processing circuit; Described voltage detecting circuit input end is connected with the I/O port of single-chip microcomputer, and output terminal is connected with signal processing circuit, and signal processing circuit connects single-chip microcomputer, and described current detection circuit, temperature sensing circuit connect single-chip microcomputer through signal processing circuit respectively.
Further, described voltage detecting circuit comprises decoder circuit, sequencing circuit and battery selection circuit, and described battery selection circuit comprises multiple photoelectric relay; The I/O port of described single-chip microcomputer is connected with the input end of decoder circuit, the output terminal of decoder circuit is at least two-way, each road output terminal is by exporting the two paths of signals with time order and function order after sequencing circuit, described two paths of signals is preceding is ground switching signal, and posterior is detector switch signal; The photoelectric relay that ground switching signal, detector switch signal are corresponding with it respectively connects.Ground switching signal is connected with first pin of its photoelectric relay one to one, and detector switch signal is connected with the 3rd pin of its photoelectric relay one to one.8th pin of described photoelectric relay is connected with the positive pole of cell, 6th pin of photoelectric relay is connected with the negative pole of cell, 7th pin of photoelectric relay is connected with the input of signal acquisition circuit, the output terminal of described signal processing circuit is connected with the I/O port of single-chip microcomputer, and the data of I/O port input are stored in the storer of single-chip microcomputer.
Further, described sequencing circuit is ground on-off circuit in parallel and detector switch circuit, ground on-off circuit just forming with door and the not gate of connecting by a series connection, detector switch circuit is made up of the positive or gate of a series connection and the not gate of series connection, ground on-off circuit and detector switch circuit accept output signal simultaneously, export the low switch signal for having time order and function order and detector switch signal.
Further, described current detection circuit gathers the current value of electric battery major loop by current sensor, be input in signal processing circuit, the output of described signal processing circuit is connected with the I/O port of single-chip microcomputer, and the data of I/O port input are stored in the storer of single-chip microcomputer.
Further, described temperature sensing circuit gathers the temperature value of electric battery by temperature sensor, be input in signal processing circuit, the output of described signal processing circuit is connected with the I/O port of single-chip microcomputer, and the data of I/O port input are stored in the storer of single-chip microcomputer.
Further, described decoder circuit adopts 3/8 line decoder chip of standard, and output low level is effective.
Further, also comprise power circuit, described power circuit is the power module carrying isolation, power unit is isolated into analog power part and digital power part, analog power part has simulation positive pole, and in analog, digital power part has digital positive pole, digitally, be connected with the 5th pin of above-mentioned photoelectric relay in analog.
Further, the quantity of described photoelectric relay and the consistent also one_to_one corresponding of the quantity of battery cell.
A kind of Prospect of EVS Powered with Batteries group consistance on-line monitoring method, comprises the following steps:
A: above-mentioned battery testing system collection also records the voltage of cell, electric current and temperature, in electric automobile during traveling process, detects once for every 5 minutes;
B:V1-V8 represents the voltage of cell 1-8, and I represents the electric current of cell, and T represents the environment temperature of battery.Note R1=V1/I, R2=V2/I, the like, R8=V8/I, removes a maximal value by R1-R8, remove a minimum value, asks for the mean value of six remaining data
and standard deviation
, the computing formula of described standard deviation is as follows:
，
Note Xi=Ri-
, and carry out stored record (i=1-8);
C: Prospect of EVS Powered with Batteries group consistance on-Line Monitor Device detects once for every 5 minutes, detects after data carry out above-mentioned process this and stores, sum up, add and represent its inconsistency with result the result of repeated detection.
Beneficial effect of the present invention is:
The present invention the present invention proposes a kind of system and method for on-line monitoring of cell of Prospect of EVS Powered with Batteries group, the mode that can realize selecting one is measured cell, by continuous switching in analog, avoid high common mode input, its measure rapidly and efficiently, result accurately and reliably.The present invention is by monomer battery voltage, and electric current, considering of temperature and cycle index, proposes a kind of method for evaluating consistency, achieve the digital quantization of consistency of battery pack index.Present invention, avoiding the chance directly contacted with high voltage, ensure that detection system stablizes the personal safety with testing staff, be applicable to promoting the use of.
Other advantages of the present invention, target and feature will be set forth to a certain extent in the following description, and to a certain extent, based on will be apparent to those skilled in the art to investigating hereafter, or can be instructed from the practice of the present invention.Target of the present invention and other advantages can be realized by structure specifically noted in instructions below or accompanying drawing and be obtained.
Accompanying drawing explanation
Fig. 1 is device connection diagram of the present invention;
Fig. 2 is the sequencing circuit schematic diagram in voltage detecting circuit of the present invention;
Fig. 3 is the battery selection circuit schematic diagram in voltage detecting circuit of the present invention.
Embodiment
Below by specific embodiment, and by reference to the accompanying drawings, the preferred embodiments of the present invention are described in detail.
As shown in Figure 1, the three-way output signal of single-chip microcomputer U1 is connected to the input end of decoder circuit U5, decoder circuit U5 comprises eight road signal output port B1-B8 and inputs with eight tunnels of sequencing circuit and be connected, and the input of each road exports as ground switching signal and detector switch signal two paths of signals after sequencing circuit U6.The 16 road signals that sequencing circuit exports are connected to the input pin with its battery selection circuit U7 one to one, the output pin of U7 is connected with the input end of signal processing circuit U2, the output terminal of signal processing circuit U2 is connected with the A/D converter input end of single-chip microcomputer, and described A/D converter belongs to the integrated system of single-chip microcomputer inside.Current sensor U8 is connected in electric battery loop, and signal output part is connected with the input end of signal processing circuit U3, and the output terminal of U3 is connected with the A/D converter input end of single-chip microcomputer.Temperature sensor U9 and battery surface are closely affixed, and signal output part is connected with the input end of signal processing circuit U4, and the output terminal of signal processing circuit U4 is connected with the A/D converter input end of single-chip microcomputer.
Be illustrated in figure 2 sequencing circuit, eight tunnels of sequencing circuit eight tunnel input one_to_one corresponding decoder circuit U5 export B1-B6, for B1 road, B1 enters detector switch circuit E1 in parallel and ground on-off circuit E2 respectively, B1 road signal enters the not gate of detector switch circuit E1 simultaneously, described detector switch circuit E1's or door 2 pins are connected to ground by the electric capacity of series connection, and described ground on-off circuit E2 is connected to ground by the circuit of connecting with 1 pin of door.The output signal of the decoder circuit be connected with sequencing circuit is the form of high-low-high, through the non-low-Gao-low of becoming behind the door, described detector switch circuit E1's or door be that negative edge is effective, described ground on-off circuit E2's is that rising edge is effective with door, thus the output signal D1D of low switch circuit E2 will be enable early than detector switch circuit E1 output signal D1S, thus realize the Time sequence control of signal, thus enable early than voltage detection signal of in analog enable realized in battery selection circuit.
As shown in Figure 3, battery selection circuit comprises 8 photoelectric relay one_to_one corresponding eight batteries, that photoelectric relay adopts is AQW214, have eight pins, described photoelectric relay first pin is connected with the output terminal of the circuit E1 in sequencing circuit U6, 3rd pin of photoelectric relay is connected with the output terminal of the circuit E2 in sequencing circuit U6, second pin of photoelectric relay and the 4th pin be digitally connected, 5th pin be connected in analog, 8th pin is connected to the positive pole with its cell one to one, 6th pin is connected to the negative pole end with its cell one to one, when the pin 1 of photoelectric relay is high level, the pin 7 of photoelectric relay will be communicated with the pin 8 of photoelectric relay, and when the pin 3 of photoelectric relay is high level, the pin 5 of photoelectric relay will be communicated with the pin 6 of photoelectric relay.
What the decoder circuit U5 that the present invention adopts adopted is 3/8 line code translator, the eight road signal Low level effectives exported, be high level signal by the non-goalkeeper's low level output in described sequencing circuit, whenever only have a road high level signal to be input in the photoelectric relay of battery selection circuit, successively conducting is carried out to other photoelectric relays.
When I/O port A3, A2, A1 output state of single chip circuit U1 is (000), decoder circuit U5 port B1 output low level, all the other are high level, and become high level by B1 after decision selectingcircuit, all the other all become low level; Through decision selectingcircuit E1 and E2, due to enable early than detector switch circuit E1 of ground on-off circuit E2 enable, thus battery cathode be connected in analog after, anode is just connected with signals collecting end, ensure that the correctness of data acquisition.When single-chip processor i/o port A3, A2, A1 output state is (010,011,100,101,110) by that analogy, detects the analog signal voltage value of the 2-6 block cell of power battery pack successively, input to single-chip microcomputer U1 one by one.
The invention still further relates to the detection of temperature and electric current, first current signal is collected through current sensor circuit U8, export analog current signal F1 to signal processing circuit U3, after the process such as a series of transport and placing device, light-coupled isolation, current signal is input in single-chip microcomputer.
Prospect of EVS Powered with Batteries group consistance on-line monitoring method, comprises the following steps:
A: above-mentioned battery testing system collection also records the voltage of cell, electric current and temperature, in electric automobile during traveling process, detects once for every 5 minutes;
B:V1-V8 represents the voltage of cell 1-8, and I represents the electric current of cell, and T represents the environment temperature of battery.Note R1=V1/I, R2=V2/I, the like, R8=V8/I, removes a maximal value by R1-R8, remove a minimum value, asks for the mean value of six remaining data
and standard deviation
, the computing formula of described standard deviation is as follows:
，
Note Xi=Ri-
, and carry out stored record (i=1-8);
C: Prospect of EVS Powered with Batteries group consistance on-Line Monitor Device detects once for every 5 minutes, detects after data carry out above-mentioned process this and stores, sum up, add and represent its inconsistency with result the result of repeated detection.
What finally illustrate is, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, other amendments that those of ordinary skill in the art make technical scheme of the present invention or equivalently to replace, only otherwise depart from the spirit and scope of technical solution of the present invention, all should be encompassed in the middle of right of the present invention.
Claims (7)
1. a Prospect of EVS Powered with Batteries group consistance on-Line Monitor Device, is characterized in that: described Prospect of EVS Powered with Batteries group consistance on-Line Monitor Device comprises single-chip microcomputer, voltage detecting circuit, current detection circuit, temperature sensing circuit and signal processing circuit; Described voltage detecting circuit input end is connected with the I/O port of single-chip microcomputer, and output terminal is connected with signal processing circuit, and signal processing circuit connects single-chip microcomputer, and described current detection circuit, temperature sensing circuit connect single-chip microcomputer through signal processing circuit respectively; Described voltage detecting circuit comprises decoder circuit, sequencing circuit and battery selection circuit, and described battery selection circuit comprises multiple photoelectric relay; The I/O port of described single-chip microcomputer is connected with the input end of decoder circuit, the output terminal of decoder circuit is at least two-way, each road output terminal is by exporting the two paths of signals with time order and function order after sequencing circuit, described two paths of signals is preceding is ground switching signal, and posterior is detector switch signal; The photoelectric relay that ground switching signal, detector switch signal are corresponding with it respectively connects;
Described sequencing circuit is ground on-off circuit in parallel and detector switch circuit, ground on-off circuit by one just with door and a not gate in series, detector switch circuit by a positive or gate and a not gate in series, ground on-off circuit and detector switch circuit accept output signal simultaneously, export the ground switching signal for having time order and function order and detector switch signal.
2. a kind of Prospect of EVS Powered with Batteries group consistance on-Line Monitor Device according to claim 1, it is characterized in that: described current detection circuit gathers the current value of electric battery major loop by current sensor, be input in signal processing circuit, the output of described signal processing circuit is connected with the I/O port of single-chip microcomputer, and the data of I/O port input are stored in the storer of single-chip microcomputer.
3. a kind of Prospect of EVS Powered with Batteries group consistance on-Line Monitor Device according to claim 2, it is characterized in that: described temperature sensing circuit gathers the temperature value of electric battery by temperature sensor, be input in signal processing circuit, the output of described signal processing circuit is connected with the I/O port of single-chip microcomputer, and the data of I/O port input are stored in the storer of single-chip microcomputer.
4. a kind of Prospect of EVS Powered with Batteries group consistance on-Line Monitor Device according to claim 3, is characterized in that: described decoder circuit adopts 3/8 line decoder chip of standard, and output low level is effective.
5. a kind of Prospect of EVS Powered with Batteries group consistance on-Line Monitor Device according to claim 4, it is characterized in that: also comprise power circuit, described power circuit is the power module carrying isolation, power unit is isolated into analog power part and digital power part, analog power part has simulation positive pole, and in analog, digital power part has digital positive pole, digitally, be connected with the 5th pin of above-mentioned photoelectric relay in analog.
6. a kind of Prospect of EVS Powered with Batteries group consistance on-Line Monitor Device according to claim 5, is characterized in that: the quantity of described photoelectric relay also one_to_one corresponding consistent with the quantity of battery cell.
7. the monitoring method of a kind of Prospect of EVS Powered with Batteries group consistance on-Line Monitor Device according to claim 1, is characterized in that: comprise the following steps:
A: the on-Line Monitor Device collection of Prospect of EVS Powered with Batteries group consistance also records the voltage of cell, electric current and temperature, in electric automobile during traveling process, detects once for every 5 minutes;
B:V1-V8 represents the voltage of cell 1-8, and I represents the electric current of cell, and T represents the environment temperature of battery; Note R1=V1/I, R2=V2/I, the like, R8=V8/I, removes a maximal value by R1-R8, remove a minimum value, asks for the mean value of six remaining data
with standard deviation δ, the computing formula of described standard deviation is as follows:
Note Xi=Ri-δ (i=1-8), and carry out stored record;
C: Prospect of EVS Powered with Batteries group consistance on-Line Monitor Device detects once for every 5 minutes, detects after data carry out above-mentioned process this and stores, sum up, add and represent its inconsistency with result the result of repeated detection.
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| CN201210145471.2A CN102680902B (en) | 2012-05-11 | 2012-05-11 | Consistency on-line monitoring device and method for motive power battery pack for electric automobile |
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| CN103837831A (en) * | 2012-11-30 | 2014-06-04 | 凯迈(洛阳)电子有限公司 | Battery effectiveness analyzing model |
| CN104614675A (en) * | 2014-12-31 | 2015-05-13 | 普天新能源车辆技术有限公司 | Power battery group consistency detection method and device |
| CN109301885A (en) * | 2017-07-24 | 2019-02-01 | 沈阳广合科技有限公司 | Multi-functional two-way V-LOCK battery charger |
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