CN205429108U - Flexible sensor of three -dimensional ERT towards inside temperature detection of power battery - Google Patents
Flexible sensor of three -dimensional ERT towards inside temperature detection of power battery Download PDFInfo
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- CN205429108U CN205429108U CN201520950870.5U CN201520950870U CN205429108U CN 205429108 U CN205429108 U CN 205429108U CN 201520950870 U CN201520950870 U CN 201520950870U CN 205429108 U CN205429108 U CN 205429108U
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Abstract
The utility model discloses a flexible sensor of three -dimensional ERT towards inside temperature detection of power battery, produce module, electrode gating module, three -dimensional electrode array module and signal acquisition module including microcontroller module, PC, drive signal, the microcontroller module produces module input, electrode gating module input and PC input with drive signal respectively and is connected, microcontroller module and signal acquisition module interconnect, drive signal produces the module output and is connected with electrode gating module 's input, the input and electrode gating module 's the output of signal acquisition module are connected, electrode gating module and three -dimensional electrode array module interconnect, the utility model discloses realize the inside apparent resistivity of three -dimensional all -round detection power battery.
Description
Technical field
This utility model relates to battery detecting field, is specifically related to a kind of three-dimensional ERT flexible sensor towards internal temperature of power battery detection.
Background technology
Along with development and the needs of society of current economic, new-energy automobile becomes one of industry with competitiveness most with prospects.Electrokinetic cell performance is the key issue of new-energy automobile industry development.Study hotspot has been become currently for the detection of electrokinetic cell different performance, traditional detection method is mainly directed towards offline inspection pattern, and current driving force battery easily in use causes the safety problems such as bulge, leakage even blast due to reasons such as misoperations, therefore it is badly in need of finding new effective detection method and electrokinetic cell inside health status is carried out online evaluation.
Electrical Resistance Tomography as a kind of detection method based on High Density Resistivity, the field such as monitoring being widely used in geology and environmental monitoring, phase pipe flow.Wherein, as primary measured parameter index, resistivity can completely reflect that measurand interior media is constituted, and further facilitates the instant health status analyzing measurand.Power battery structure is complicated, is mainly made up of positive and negative electrode, barrier film, electrolyte, pole and shell etc..Apparent resistivity can characterize the physical characteristic of electrokinetic cell internal material well, has close ties with electrokinetic cell characteristic.Therefore, electrokinetic cell inside change in apparent resistivity is monitored in real time have broad application prospects.
Research team has been proposed that the internal apparent resistivity measuring method of electrokinetic cell based on Electrical Resistance Tomography, the internal apparent resistivity regularity of distribution of the electrokinetic cell of based on two-dimensional detection pattern of exploratory study, the method can provide abundant, battery apparent resistivity section inversion chart picture intuitively.But two-dimensional detection pattern still can not carry out region-wide detection by apparent resistivity short to survey line, electrokinetic cell interior zone that thickness is deep.Team uses three-dimensional all-directional detection method to learn the deficiency that the internal apparent resistivity of electrokinetic cell can overcome two-dimensional measurement pattern to exist well at present, and wherein three-dimensional apparent resistivity measures the core that sensor is then whole detection method.Three-dimensional apparent resistivity is measured and is needed higher resolution, stability and real-time,
Utility model content
In order to overcome prior art can not, present situation that apparent resistivity of electrokinetic cell interior zone that thickness deep carry out region-wide detection short to survey line, this utility model provides a kind of three-dimensional ERT flexible sensor towards internal temperature of power battery detection.
This utility model adopts the following technical scheme that
A kind of three-dimensional ERT flexible sensor towards internal temperature of power battery detection, including micro controller module, PC, pumping signal generation module, electrode gating module, three-dimensional electrode arrays module and signal acquisition module, described micro controller module respectively with pumping signal generation module input, electrode gating module input and PC input connect, described micro controller module is connected with each other with signal acquisition module, described pumping signal generation module outfan is connected with the input of electrode gating module, the input of described signal acquisition module is connected with the outfan of electrode gating module, described electrode gating module is connected with each other with three-dimensional electrode arrays module；
Described micro controller module includes interconnective uplink and downlink microcontroller, is used for ensureing that pumping signal sequential is Tong Bu with signals collecting signal sequence；
Described pumping signal generation module, for producing the exciting current pulse needed for electrode gating module；
Described electrode gating module includes exciting electrode gating switch and measures electrode gating switch, the switching in three-dimensional electrode arrays module row/column and the switching between row/column；
Described three-dimensional electrode arrays module, is made up of the copper plate electrode array being welded on flexible circuit board, fits with electrokinetic cell surface, is used for forming electric field.
Described three-dimensional electrode arrays module uses the copper plate electrode array of 5 × 10 rectangular arranged being welded on flexible circuit board to constitute.
Described signal acquisition module is made up of preamplifying circuit, power frequency filter circuit, secondary amplification circuit and analog to digital conversion circuit.
Described copper plate electrode is specially the circular red copper electrode of diameter 5mm, thickness 0.6mm.
The beneficial effects of the utility model:
(1) the electrode unilateral array basic model of 5 × 10 rectangular arranged is used, it is possible to achieve the internal apparent resistivity of three-dimensional all-directional detection electrokinetic cell；
(2) flexible circuit board (FPC) is used to replace conventional wire cable, Integrated electrode sheet and all circuits of hardware system, electrode slice is directly welded on flexible circuit board, finally by connector, FPC is connected with hardware circuit, be effectively increased the measurement system integration.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of three-dimensional ERT flexible sensor towards internal temperature of power battery detection of this utility model；
Fig. 2 is that three-dimensional ERT flexible sensor combines structure chart with electrokinetic cell.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, this utility model is described in further detail, but embodiment of the present utility model is not limited to this.
Embodiment
As shown in Figure 1, a kind of three-dimensional ERT flexible sensor towards internal temperature of power battery detection, including micro controller module, PC, pumping signal generation module, electrode gating module, three-dimensional electrode arrays module and signal acquisition module, described micro controller module respectively with pumping signal generation module input, electrode gating module input and PC input connect, described micro controller module is connected with each other with signal acquisition module, described pumping signal generation module outfan is connected with the input of electrode gating module, the input of described signal acquisition module is connected with the outfan of electrode gating module, described electrode gating module is connected with each other with three-dimensional electrode arrays module；
Described micro controller module includes interconnective microcontroller up, descending, upload control device sends control command mainly for disparate modules, descending microcontroller is then responsible for signals collecting and conditioning, timing synchronization and the real-time Communication for Power with PC, and uplink/downlink microcontroller is in communication with each other and guarantees pumping signal sequential and signals collecting timing synchronization.
Micro controller module mainly uses single-chip microcomputer as microcontroller, substantial amounts of command signal is needed in view of electrode gating module, pumping signal generation module needs gain control simultaneously, plus the real-time Communication for Power with PC, design uses the Micro Energy Lose hybrid digital processor MSP430F169 of TI company, constituting dual microcontroller framework, uplink/downlink microcontroller collaborative work can be greatly improved work efficiency.
Described pumping signal generation module, for producing the exciting current pulse needed for electrode gating module, makes inside battery produce consistent electric field；
Pumping signal generation module uses microprocessor controls DAC chip to produce the pulse voltage signal of frequency-adjustable, under reference voltage effect, through the voltage/current conversion circuit being made up of instrumentation amplifier able to programme and precision operational-amplifier, the adjustable pulsed current signal of High Precision Gain can be produced.Design use DAC0808 as pulse voltage source；Use PGA203 as instrumentation amplifier, voltage/current conversion circuit is constituted with high speed and precision integrated transporting discharging AD711, having only to the i.e. available required bi-directional pulse current signal of a fixed resistance, its signal amplitude can be realized by the amplification of single-chip microcomputer MSP430 programming Control PGA203 further.
Described electrode gating module includes exciting electrode gating switch and measures electrode gating switch, is respectively completed exciting current pulse signal and the conduction of tested voltage signal, the switching in three-dimensional electrode arrays module row/column and the switching between row/column.
Electrode gating module selects the MAX396 chip of MAXIM company as gating switch, and it is 16 to select 1 high-speed cmos analog switch chip, and the conducting resistance of chip is 100 Ω, and leakage current is 0.75nA, can meet the high speed switching of horizontal 10 electrodes in system.Additionally, when switching between row/column, then need extra four MAX396 to form two grades of gatings, it is ensured that at the end of a certain row/column is measured, to switch to rapidly next line/column scan.
Described three-dimensional electrode arrays module, is made up of copper plate electrode array, fits with electrokinetic cell surface, is used for forming electric field.
Described three-dimensional sensing array module uses the electrode unilateral array basic model of 5 × 10 rectangular arranged, the internal apparent resistivity of three-dimensional all-directional detection electrokinetic cell, flexible circuit board (FPC) is used to replace conventional wire cable, Integrated electrode sheet and all circuits of hardware system, electrode slice is directly welded on flexible circuit board, finally by connector, flexible circuit board (FPC) is connected with hardware circuit.
In the unilateral array of described electrode, electrode uses red copper material, and red copper resistivity standard value is 1.75 × 10-6Ω m, has good electric conductivity；Its chemical stability arranges the 11st in metal activity series table, has stable chemical characteristic；The temperature coefficient of resistivity of red copper is only 3.9 × 10-3/ DEG C, to variations in temperature insensitive, it is simple to be arranged on inside the power battery pack that ambient temperature is complicated.
Described electrode slice is a size of diameter 5mm, the circular red copper electrode slice of thickness 0.6mm, adjacent pole piece spacing is 12mm, early stage carries out the effect of multiple parameters orthogonal optimization test for electrokinetic cell Electrical Resistance Tomography, and the factors such as electrode slice shape, electrode slice thickness, exciting current size and configuration of electrodes that comprehensively analyze affect significance degree to experimental result.
Described flexible circuit board (FPC) made of soft, thickness at below 1mm, great elastically flexible, be printed with the transmission line being connected with electrode slice simultaneously, reduce use space largely.Furthermore, FPC thin plate is mainly made up of polyimides and terylene thin plate, has good heat resistance (more than 280 DEG C).Additionally, FPC material is pliable and tough flexible, even if the deformation such as electrokinetic cell generation bulge also will not produce significantly affect.This novel three-dimensional flexible sensor uses two flexible circuit boards (FPC) to constitute 5 × 10 Array Model, can cover the whole square surface of battery.
Signal acquisition module is connected with PC, completes exciting current pulse signal and the conduction of tested voltage signal.In design, amplifying circuit uses instrumentation amplifier INA114 as the core devices of two-stage amplifying circuit, and twice amplification is 1-108；For preventing industrial frequency noise from disturbing, power frequency notch filter F42N50 is used to ensure that signal lossless filters；Analog-digital converter uses the MAX120 chip of resolution 12bit, and analogue signal quickly can be converted into the digital signal that can read by the conversion time of 1.6us.
Fig. 2 is novel three-dimensional ERT flexible sensor and electrokinetic cell combination die type.Novel three-dimensional ERT flexible sensor towards internal temperature of power battery detection will use flexible circuit board (FPC) 1 conduct sensing substrate, and use 5 × 5 electrode matrixes 2 to constitute sensor sensing element solder on FPC thin plate.As in figure 2 it is shown, two panels FPC thin plate is combined and is fixed on electrokinetic cell 3 surface, form 5 × 10 complete sensor array measurement modules.
Above-described embodiment is this utility model preferably embodiment; but embodiment of the present utility model is also not restricted by the embodiments; other any without departing from the change made under spirit of the present utility model and principle, modify, substitute, combine, simplify; all should be the substitute mode of equivalence, within being included in protection domain of the present utility model.
Claims (4)
1. the three-dimensional ERT flexible sensor towards internal temperature of power battery detection, it is characterized in that, including micro controller module, PC, pumping signal generation module, electrode gating module, three-dimensional electrode arrays module and signal acquisition module, described micro controller module respectively with pumping signal generation module input, electrode gating module input and PC input connect, described micro controller module is connected with each other with signal acquisition module, described pumping signal generation module outfan is connected with the input of electrode gating module, the input of described signal acquisition module is connected with the outfan of electrode gating module, described electrode gating module is connected with each other with three-dimensional electrode arrays module；
Described micro controller module includes interconnective uplink and downlink microcontroller；
Described electrode gating module includes exciting electrode gating switch and measures electrode gating switch；
Described three-dimensional electrode arrays module, is made up of the copper plate electrode array being welded on flexible circuit board, fits with electrokinetic cell surface.
Three-dimensional ERT flexible sensor the most according to claim 1, it is characterised in that described three-dimensional electrode arrays module uses the copper plate electrode array of 5 × 10 rectangular arranged being welded on flexible circuit board to constitute.
Three-dimensional ERT flexible sensor the most according to claim 1, it is characterised in that described signal acquisition module is made up of preamplifying circuit, power frequency filter circuit, secondary amplification circuit and analog to digital conversion circuit.
Three-dimensional ERT flexible sensor the most according to claim 2, it is characterised in that copper plate electrode is specially the circular red copper electrode of diameter 5mm, thickness 0.6mm.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105514516A (en) * | 2015-11-25 | 2016-04-20 | 华南理工大学 | Three-dimensional ERT flexible sensor for power battery internal temperature detection |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105514516A (en) * | 2015-11-25 | 2016-04-20 | 华南理工大学 | Three-dimensional ERT flexible sensor for power battery internal temperature detection |
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