CN103235264A - Battery SOC (stage of charge) measurement method and device - Google Patents

Abstract

The invention provides battery SOC (stage of charge) measurement method and device. Whether to start SOC detection process or not is determined by battery current detection; battery snap-back voltage detection and temperature detection are performed then; corrected SOC 2 is obtained by judging whether battery snap-back voltage is larger than or equal to a threshold or not and by different calculation methods and temperature correction. Battery snap-back voltage can be detected and calculated only by detecting zero battery current by the method and device, long-time standing for open-circuit voltage prior to calculation is battery SOC is avoided, and the problem of long standing time is solved. In addition, detection on battery snap-back voltage and ambient temperature is started and the battery SOC is calculated once the detected battery current is zero, and accordingly online measurement of battery SOC is realized.

Description

A kind of battery remaining power measuring method and device

Technical field

The present invention relates to electrokinetic cell capacity check technical field, relate in particular to a kind of battery remaining power measuring method and device.

Background technology

Electrokinetic cell is widely used in numerous areas such as electric power, traffic, post and telecommunications at present, become one of critical component of system, its reliability service directly has influence on performance and the operation of equipment set, and in service often can't accurately the prediction because of remaining battery capacity causes damage or major accident.Therefore the accurate prediction of remaining battery capacity (mainly with state-of-charge SOC measurement) becomes in the battery management the most primary task of fundamental sum.

The SOC Forecasting Methodology mainly contains the open-circuit voltage method, is open-circuit voltage and then calculating SOC by detecting accumulator.By detecting the open-circuit voltage of accumulator, obtain the open-circuit voltage difference when this moment, open-circuit voltage fully discharged with accumulator, the open-circuit voltage difference when being full of electricity and abundant discharge with accumulator is done ratio, obtains accumulator residual capacity SOC at this moment.

Computing formula is:

V wherein _BOBe battery open circuit voltage, V _aOpen-circuit voltage when being full of electricity, V _bOpen-circuit voltage during for abundant discharge.

Though open-circuit voltage method computing formula is simple, needs accumulator to leave standstill steady state (SS) for a long time and just can measure open-circuit voltage V _BOAnd, when adopting open-circuit voltage method calculating accumulator residual capacity SOC, need accumulator to be in light condition for a long time, therefore can not realize on-line measurement.

Summary of the invention

In view of this, the invention provides a kind of battery remaining power measuring method and device, grow and can not realize the problem of on-line measurement to solve time of repose.

To achieve these goals, the existing scheme that proposes is as follows:

A kind of battery remaining power measuring method comprises:

Detect battery current;

When judging that described battery current is zero, gathers the temperature of battery rebound voltage and battery environment of living in;

Determine battery remaining power value SOC according to described battery rebound voltage ₂Computing formula;

Temperature and battery rebound voltage according to described battery environment of living in are determined correcting mode;

Adopt described definite battery remaining power value SOC ₂Computing formula calculates battery remaining power value SOC ₂, and the battery remaining power value SOC that adopts described definite correcting mode corrected Calculation to obtain ₂

Preferably, describedly determine battery remaining power value SOC according to described battery rebound voltage ₂Computing formula comprises:

Judge that whether described battery rebound voltage is more than or equal to threshold value;

When judging described battery rebound voltage more than or equal to threshold value, adopt formula S OC ₂=(0.0052U _t ³-0.1887U _t+ 2.3034U _t-9.394) * 10 ⁴Calculate battery remaining power value SOC ₂

When judging described battery rebound voltage less than threshold value, adopt formula ${\mathrm{SOC}}_{}$ ${}_2=-{0.0249\mathrm{<figure-callout\; id="2"\; label="U\; t"\; filenames="DEST\_PATH\_HDA00003142246800062.png,DEST\_PATH\_HDA00003142246800071.png"\; state="\{\{state\}\}">U</figure-callout>}}_t^{}+{1.0225U}_t-8.2236$ Calculate battery remaining power value SOC ₂

Preferably, described temperature and battery rebound voltage according to described battery environment of living in is determined correcting mode, comprising:

Obtain the temperature of described battery environment of living in;

Calculate the temperature of described battery environment of living in and the difference of reference temperature;

When judging described battery rebound voltage more than or equal to threshold value, adopt the first default corresponding relation to obtain battery rebound voltage and determine correcting mode, when judging described battery rebound voltage less than threshold value, adopt the second default corresponding relation to obtain battery rebound voltage and determine correcting mode, the described first default corresponding relation and the second default corresponding relation are described difference and battery remaining power value SOC ₂The corresponding relation of correction.

Preferably, described battery remaining power measuring method also comprises:

Judge described revised battery remaining power value SOC ₂Whether less than 15%;

When judging described revised battery remaining power value SOC ₂Less than 15% o'clock, report to the police.

Preferably, described battery remaining power measuring method also comprises: show described revised battery remaining power value SOC ₂

A kind of battery remaining power measurement mechanism comprises: current detection circuit, voltage detecting circuit, temperature sensing circuit and controller, wherein:

Described current detection circuit exports the battery current signal to described controller for detection of battery current;

Described voltage detecting circuit is used for detecting battery rebound voltage when judging that described battery current is zero, exports the battery voltage signal that knock-ons to described controller;

Described temperature sensing circuit is used for detecting the temperature of described battery environment of living in when judging that described battery current is zero, exports temperature signal to described controller;

Described controller is used for receiving the temperature signal of battery rebound voltage signal, battery current signal and battery environment of living in, determines battery remaining power value SOC according to described battery rebound voltage ₂Computing formula; Temperature and battery rebound voltage according to described battery environment of living in are determined correcting mode; Adopt described definite battery remaining power value SOC ₂Computing formula calculates battery remaining power value SOC ₂, and the battery remaining power value SOC that adopts described definite correcting mode corrected Calculation to obtain ₂

Preferably, described controller is the 89S51 single-chip microcomputer;

The P14 of described 89S51 single-chip microcomputer, P15, P16 and P17 mouth link to each other with described voltage detecting circuit;

The P32 mouth of described 89S51 single-chip microcomputer links to each other with described current detection circuit;

The P33 mouth of described 89S51 single-chip microcomputer links to each other with described temperature sensing circuit.

Preferably, described voltage detecting circuit comprises: operational amplifier LM324, A/D chip MCP3208, first resistance, second resistance, the 3rd resistance and the 4th resistance;

The negative-phase input of described operational amplifier LM324 receives described battery rebound voltage signal, and described battery rebound voltage signal enters the negative-phase input of described operational amplifier LM324 via described first resistance; The normal phase input end of described operational amplifier LM324 receives the 10V reference voltage signal, and described 10V reference voltage signal enters the normal phase input end of described operational amplifier LM324 via described second resistance; The normal phase input end of described operational amplifier LM324 links to each other with output terminal, is connected described the 3rd resistance between described normal phase input end and the output terminal, and the output terminal of described operational amplifier LM324 sends simulating signal to described A/D chip MCP3208; The negative-phase input of described operational amplifier LM324 links to each other with described the 4th resistance, the other end ground connection of described second resistance; The positive control termination 15V reference voltage signal of described operational amplifier LM324; The negative control end ground connection of described operational amplifier LM324;

1 mouthful of described A/D chip MCP3208 receives the simulating signal that described operational amplifier LM324 sends, 9 mouthfuls link to each other with 14 mouthfuls and ground connection, 10 mouthfuls of P17 mouths that connect described controller, 11 mouthfuls of P16 mouths that connect described controller, 12 mouthfuls of P15 mouths of exporting digital signals and connecing described controller, 13 mouthfuls of P14 mouths that connect described controller, 16 mouthfuls connect the 5V reference voltage signal.

Preferably, described current detection circuit comprises the 5th resistance and the 6th resistance:

Described the 5th resistance receives described battery current signal, and the other end of described the 5th resistance links to each other with described the 6th resistance, the other end ground connection of described the 6th resistance, and described the 5th earth resistance links to each other with described controller with the tie point of described the 6th resistance.

Preferably, described temperature sensing circuit comprises: digital temperature sensor DS18B20 and the 7th resistance:

The VCC end of described digital temperature sensor DS18B20 connects voltage VCC and links to each other; The DQ end of described digital temperature sensor DS18B20 links to each other with described the 7th resistance, and the other end of described the 7th resistance links to each other with described controller, and connects voltage VCC; The GND end ground connection of described digital temperature sensor DS18B20.

Preferably, described battery remaining power measurement mechanism also comprises display circuit, and described display circuit is used for receiving electrokinetic cell remaining capacity signal and the demonstration that described controller transmits;

Described display circuit comprises: three-in-one cloudy LED charactron, 4511 code translators, 7404 phase inverters, the 8th resistance, the 9th resistance, the tenth resistance, the 11 resistance, the 12 resistance, the 13 resistance and the 14 resistance altogether;

12 mouthfuls of described three-in-one altogether cloudy LED charactron with described 7404 phase inverters 2 mouthfuls link to each other, 9 mouthfuls of described three-in-one altogether cloudy LED charactron with described 7404 phase inverters 4 mouthfuls link to each other, and 8 mouthfuls of described three-in-one common cloudy LED charactron with described 7404 phase inverters 6 mouthfuls link to each other;

1 mouthful of described 7404 phase inverters links to each other with the P20 mouth of described controller, and 3 mouthfuls of described 7404 phase inverters link to each other with the P21 mouth of described controller, and 5 mouthfuls of described 7404 phase inverters link to each other with the P22 of described controller;

7 mouthfuls of described 4511 code translators link to each other with the P24 mouth of described controller, 1 mouthful of described 4511 code translators links to each other with the P25 mouth of described controller, 2 mouthfuls of described 4511 code translators link to each other with the P26 mouth of described controller, 6 mouthfuls of described 4511 code translators link to each other with the P27 mouth of described controller, 3 mouthfuls of described 4511 code translators link to each other with 4 mouthfuls and connect the 5V voltage signal, 5 mouthfuls of ground connection of described 4511 code translators, 13 mouthfuls of described 4511 code translators link to each other with described the 8th resistance, and link to each other with 11 mouthfuls of described three-in-one altogether cloudy LED charactron, 12 mouthfuls of described 4511 code translators link to each other with described the 9th resistance, and link to each other with 7 mouthfuls of described three-in-one altogether cloudy LED charactron, 11 mouthfuls of described 4511 code translators link to each other with described the tenth resistance, and link to each other with 4 mouthfuls of described three-in-one altogether cloudy LED charactron, 10 mouthfuls of described 4511 code translators link to each other with described the 11 resistance, and link to each other with 2 mouthfuls of described three-in-one altogether cloudy LED charactron, 9 mouthfuls of described 4511 code translators link to each other with described the 12 resistance, and link to each other with 1 mouthful of described three-in-one altogether cloudy LED charactron, 15 mouthfuls of described 4511 code translators link to each other with described the 13 resistance, and link to each other with 10 mouthfuls of described three-in-one altogether cloudy LED charactron, 14 mouthfuls of described 4511 code translators link to each other with described the 14 resistance, and link to each other described the 8th resistance with 5 mouthfuls of described three-in-one altogether cloudy LED charactron, the 9th resistance, the tenth resistance, the 11 resistance, the 12 resistance, the other end parallel connection of the 13 resistance and the 14 resistance also connects the 5V voltage signal.

Preferably, described battery remaining power measurement mechanism also comprises warning circuit, and described warning circuit is used for receiving the order of described controller transmission so that the warning of electric weight deficiency to be provided;

Described warning circuit comprises: hummer, triode and the 15 resistance;

Described hummer one end ground connection, the other end links to each other with described transistor collector, the emitter of described triode connects the 5V voltage signal, and the base stage of described triode links to each other with described the 15 resistance, and the other end of described the 15 resistance links to each other with the P23 mouth of described controller.

Preferably, described battery remaining power measurement mechanism also comprises storer, and described storer is used for preserving parameters such as SOC value, warning message, and produces reset signal to guarantee the normal operation of described controller;

Described storer comprises: X25024 chip and the 16 resistance;

1 mouthful of described X25024 chip links to each other with the P10 mouth of described controller, 2 mouthfuls of described X25024 chip link to each other with the P11 mouth of described controller, 5 mouthfuls of described X25024 chip link to each other with the P12 mouth of described controller, 6 mouthfuls of described X25024 chip link to each other with the P13 mouth of described controller, 3 mouthfuls of described X25024 chip connect the 5V voltage signal, 7 mouthfuls of described X25024 chip link to each other with described the 16 resistance, tie point links to each other with the RST mouth of described controller, and the other end of described the 16 resistance connects the 5V voltage signal.

From above-mentioned technical scheme as can be seen, battery remaining power measuring method disclosed by the invention and device, detect to determine whether to start the dump energy testing process by battery current, carry out detection and the temperature detection of battery rebound voltage then, again by judging that whether battery rebound voltage is more than or equal to threshold value, carry out different computing method and temperature correction, obtain corrected residual capacity SOC ₂Battery remaining power measuring method disclosed by the invention and device, only need collect battery rebound voltage can calculate, it is zero can the startup that the collection of battery rebound voltage only needs battery current to detect, do not need to leave standstill for a long time to carry out again after obtaining open-circuit voltage the calculating of battery remaining power, solved the long problem of time of repose; And in a single day be zero when detecting battery current among the present invention, can start the detection to battery rebound voltage and environment temperature, battery remaining power is calculated, realized the on-line measurement of battery remaining power.

Description of drawings

In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is the disclosed data acquisition process process flow diagram of the embodiment of the invention;

Fig. 2 is the disclosed data acquisition process process flow diagram of another embodiment of the present invention;

Fig. 3 is the disclosed data acquisition process process flow diagram of another embodiment of the present invention;

Fig. 4 is the disclosed data acquisition process process flow diagram of another embodiment of the present invention;

Fig. 5 is the disclosed data acquisition process process flow diagram of another embodiment of the present invention;

Fig. 6 is the disclosed hardware catenation principle of embodiment of the invention block diagram;

Fig. 7 is the disclosed hardware connecting circuit block diagram of another embodiment of the present invention;

Fig. 8 is the disclosed hardware connecting circuit block diagram of another embodiment of the present invention;

Fig. 9 is the disclosed hardware connecting circuit block diagram of another embodiment of the present invention;

Figure 10 is the disclosed hardware connecting circuit block diagram of another embodiment of the present invention;

Figure 11 is the disclosed hardware connecting circuit block diagram of another embodiment of the present invention;

Figure 12 is the disclosed hardware connecting circuit block diagram of another embodiment of the present invention;

Figure 13 is the disclosed hardware connecting circuit block diagram of another embodiment of the present invention;

Figure 14 is the synoptic diagram of rebound voltage behind the disclosed battery discharge of the embodiment of the invention;

Figure 15 is the disclosed battery equivalent mathematical model of embodiment of the invention figure.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.

The invention provides a kind of battery remaining power measuring method, grow and can not realize the problem of on-line measurement to solve time of repose.

As inscribe shown in 1, described battery remaining power measuring method comprises the steps:

S101, detection battery current;

Detect the electric current that battery is providing at present, to learn battery present located state;

S102, when judging that described battery current is zero, gathers the temperature of battery rebound voltage and battery environment of living in;

The inventor finds after deliberation, the terminal voltage of battery is in saltus step of off-line moment existence, battery discharge is the A point to the point of cut-off voltage, cut off discharge loop, this moment, battery current was 0, and the terminal voltage of battery will jump to the B point from the A point, as shown in figure 14, C point among the figure returns to metastable magnitude of voltage for battery breaks away from load circuit by after a while gradual change; Voltage reaches the value that B orders and is battery rebound voltage U t in these cases;

When judging that described battery current is zero, illustrate that this moment, battery broke away from load, the measurement of battery rebound voltage U t only needs the of short duration disengaging load of battery (carrying out when stopping as the electric automobile crossroad) just can record, and does not influence the operation of electrokinetic cell fully;

Gather the temperature of battery environment of living in so that follow-up the correction;

S103, determine battery remaining power value SOC according to described battery rebound voltage ₂Computing formula;

The inventor finds that after deliberation the mathematical model of accumulator can represent that as shown in figure 15, wherein R1 is equivalent ohmic resistance with an equivalent resistance-capacitance circuit; R2 is the resistance parameter of the equivalent capacitance-resistance link that produces of activation polarization and concentration polarization, i.e. polarization resistance; C is the capacitance parameter of the equivalent capacitance-resistance link that produces of activation polarization and concentration polarization, i.e. polarization capacity; E is the back electromotive force of battery; U is battery terminal voltage; I is working current.

Then the dynamic process of ordering from the B point of Figure 14 to C, have:

$E\left(S\right)-U\left(S\right)=I\left(S\right)\&times;({\mathrm{<figure-callout\; id="1"\; label="R"\; filenames="DEST\_PATH\_HDA00003142246800062.png,DEST\_PATH\_HDA00003142246800071.png"\; state="\{\{state\}\}">R</figure-callout>}}_1+\frac{{\mathrm{<figure-callout\; id="2"\; label="R"\; filenames="DEST\_PATH\_HDA00003142246800062.png,DEST\_PATH\_HDA00003142246800071.png"\; state="\{\{state\}\}">R</figure-callout>}}_2\&times;\frac{1}{\mathrm{<figure-callout\; id="2"\; label="Cs\; R"\; filenames="DEST\_PATH\_HDA00003142246800062.png,DEST\_PATH\_HDA00003142246800071.png"\; state="\{\{state\}\}">Cs</figure-callout>}}}{R_{}})---\left(1\right)$

Formula (1) is carried out obtaining after the pull-type inverse transformation:

$e\left(t\right)-u\left(t\right)=i\left(t\right)\&times;{\mathrm{<figure-callout\; id="1"\; label="R"\; filenames="DEST\_PATH\_HDA00003142246800062.png,DEST\_PATH\_HDA00003142246800071.png"\; state="\{\{state\}\}">R</figure-callout>}}_1+i\left(t\right)\&times;{\mathrm{<figure-callout\; id="2"\; label="R"\; filenames="DEST\_PATH\_HDA00003142246800062.png,DEST\_PATH\_HDA00003142246800071.png"\; state="\{\{state\}\}">R</figure-callout>}}_2\&times;(1-e^{-\frac{t}{T_2}})---\left(2\right)$

In the formula: T ₂=R ₂* C is the polarization time constant;

Obtain the terminal voltage at battery two ends after the variation:

u(t)＝e(t)-i(t)×(R ₂+R ₂)+u ₂(t)

u(t)＝e(t)-u ₂(t)+u ₂(t)

U in the following formula ₁(t) be because the various resistance (comprising equivalent ohmic resistance R 1 and polarization resistance R2) in the loop produce, at current function $i\left(t\right)=\left\{\begin{array}{c}K,t<0\\ 0,t\&GreaterEqual;0\end{array}\right.$ Effect under, when t=0, u ₂(t)=0, the AB section among Fig. 1 just; And u ₂(t) be recovery voltage, then have:

$u_h\left(t\right)=i\left(t\right)\&times;R_2{e}^{-\frac{t}{T_2}}---\left(3\right)$

U behind t=0 (t) presents the characteristic of an exponential damping, because the electric current generation is negative saltus step, be equivalent to input signal for negative, so battery terminal voltage presents the slowly situation of recurrence, i.e. a BC section among Fig. 1.According to formula (3), work as t=0, battery terminal voltage is rebound voltage u _t(t), and when t → x, the open-circuit voltage of battery equals the battery back electromotive force, then:

$u_t\left(t\right)=U_k+i\left(t\right)\&times;{\mathrm{<figure-callout\; id="2"\; label="R"\; filenames="DEST\_PATH\_HDA00003142246800062.png,DEST\_PATH\_HDA00003142246800071.png"\; state="\{\{state\}\}">R</figure-callout>}}_2\&times;e^{-\frac{t}{T_2}}---\left(4\right)$

That is to say that when electric current is moment of 0, because the loss of voltage that polarization produces also recovers fully, need leaving standstill of certain hour, the terminal voltage of battery just may return to open-circuit voltage.

As seen from the above analysis: rebound voltage u _t(t) be decided by that the size of battery open circuit voltage Uk is (especially bigger at open-circuit voltage, under the less relatively situation of polarization loss voltage), and the residual capacity of open-circuit voltage and battery has relatively more fixing relation, therefore voltage and the residual capacity of knock-oning also has close relationship, can obtain embodying the formula of rebound voltage and residual capacity relation by analysis.

S104, determine correcting mode according to the temperature of described battery environment of living in and battery rebound voltage;

The inventor discovers that after temperature raise, under identical rebound voltage, residual capacity reduced to some extent.Can obtain the correcting mode determined by the temperature of described battery environment of living in and battery rebound magnitude of voltage according to concrete derivation.

S105, the described definite battery remaining power value SOC of employing ₂Computing formula calculates battery remaining power value SOC ₂, and the battery remaining power value SOC that adopts described definite correcting mode corrected Calculation to obtain ₂

According to measured battery rebound magnitude of voltage, by adopting described definite battery remaining power value SOC ₂Computing formula can calculate battery remaining power value SOC ₂Again according to the residing ambient temperature value of battery that records, the battery remaining power value SOC that adopts described definite correcting mode corrected Calculation to obtain ₂

Battery remaining power measuring method disclosed by the invention, only need collect battery rebound voltage can calculate, it is zero can the startup that the collection of battery rebound voltage only needs battery current to detect, moment at the battery off-line just can obtain, do not need to leave standstill for a long time to carry out again after obtaining open-circuit voltage the calculating of battery remaining power, solved the long problem of time of repose; And in a single day be zero when detecting battery current among the present invention, can start the detection to battery rebound voltage and environment temperature, battery remaining power is calculated, realized the on-line measurement of battery remaining power.

The invention also discloses a kind of battery remaining power measuring method, as shown in Figure 2, concrete step comprises:

S201 detects battery current;

Detect the electric current that battery is providing at present, with the state of learning that battery is present;

S202 is when judging that described battery current is zero, gathers the temperature of battery rebound voltage and battery environment of living in;

Judge at first whether detected battery current is zero, is zero in case judge detected battery current, can gather the temperature of battery rebound voltage and battery environment of living in, in order to calculating and revise battery remaining power value SOC ₂

S203 determines battery remaining power value SOC according to described battery rebound voltage ₂Computing formula, concrete step comprises:

S2031 judges that at first whether described battery rebound voltage is more than or equal to threshold value;

Experiment repeatedly through the inventor obtains: described threshold value is 11.8V, judges that whether detected battery rebound voltage is more than or equal to threshold value 11.8V;

S2032 adopts formula S OC when judging described battery rebound voltage more than or equal to threshold value ₂=(0.0052U _t ³-0.1887U _t+ 2.3034U _t-9.394) * 10 ⁴Calculate battery remaining power value SOC ₂

Pass through inventor's analysis and test repeatedly obtaining, when judging described battery rebound voltage more than or equal to threshold value 11.8V, ignore discharge rate to SOC ₂The part experimental data is got in the influence of=f (Ut) function, and is as follows with this funtcional relationship of least square fitting:

SOC ₂=(0.0052U _t ³-0.1887U _t+2.3034U _t-9.394)×10 ⁴ （5）

S2033 adopts formula when judging described battery rebound voltage less than threshold value ${\mathrm{SOC}}_{}$ ${}_2=-{0.0249\mathrm{<figure-callout\; id="2"\; label="U\; t"\; filenames="DEST\_PATH\_HDA00003142246800062.png,DEST\_PATH\_HDA00003142246800071.png"\; state="\{\{state\}\}">U</figure-callout>}}_t^{}+{1.0225U}_t-8.2236$ Calculate battery remaining power value SOC ₂

When judging described battery rebound voltage less than threshold value 11.8V, ignore discharge rate to SOC ₂The part experimental data is got in the influence of=f (Ut) function, and is as follows with this funtcional relationship of least square fitting:

${\mathrm{<figure-callout\; id="2"\; label="SOC"\; filenames="DEST\_PATH\_HDA00003142246800062.png,DEST\_PATH\_HDA00003142246800071.png"\; state="\{\{state\}\}">SOC</figure-callout>}}_2=-{0.0249\mathrm{<figure-callout\; id="2"\; label="U\; t"\; filenames="DEST\_PATH\_HDA00003142246800062.png,DEST\_PATH\_HDA00003142246800071.png"\; state="\{\{state\}\}">U</figure-callout>}}_t^{}+{1.0225U}_t-8.2236---\left(6\right)$

S204 determines correcting mode according to temperature and the battery rebound voltage of described battery environment of living in;

Compare according to the battery that records environment temperature of living in and reference temperature 25 degree, determine correction and the correcting mode of corresponding described battery rebound voltage;

S205 adopts described definite battery remaining power value SOC ₂Computing formula calculates battery remaining power value SOC ₂, and the battery remaining power value SOC that adopts described definite correcting mode corrected Calculation to obtain ₂

The battery remaining power value SOC that the battery rebound voltage that records according to correspondence adopts ₂Computing formula calculate, and the correction that obtained according to the last step and correcting mode are to the battery remaining power value SOC after calculating ₂Revise, obtain revised battery remaining power value SOC ₂

The disclosed battery remaining power measuring method of present embodiment, only need collect battery rebound voltage in the moment of battery off-line can calculate, and does not need to leave standstill for a long time, has solved the long problem of time of repose; And in a single day be zero when detecting battery current among the present invention, can start the detection to battery rebound voltage and environment temperature, battery remaining power is calculated, realized the on-line measurement of battery remaining power.

The invention also discloses another battery remaining power measuring method, show as Fig. 3, concrete step comprises:

S301 detects battery current;

Detect the electric current that battery is providing at present, with the state of learning that battery is present;

S302 is when judging that described battery current is zero, gathers the temperature of battery rebound voltage and battery environment of living in;

Judge at first whether detected battery current is zero, is zero in case judge detected battery current, can gather the temperature of battery rebound voltage and battery environment of living in, in order to calculating and revise battery remaining power value SOC ₂

S303 determines battery remaining power value SOC according to described battery rebound voltage ₂Computing formula;

Rebound voltage and residual capacity have close relationship, can obtain embodying the formula of rebound voltage and residual capacity relation by analysis;

S304 determines correcting mode according to temperature and the battery rebound voltage of described battery environment of living in; Concrete step comprises:

S3041 obtains the temperature of described battery environment of living in;

The temperature of the battery environment of living in that collects is obtained, in order to using;

S3042 calculates the temperature of described battery environment of living in and the difference of reference temperature;

Temperature and reference temperature 25 degree of the battery environment of living in that gets access to are compared calculating, and the temperature that obtains battery environment of living in is higher than the difference of reference temperature 25 degree;

S3043 judges that described battery rebound voltage is more than or equal to threshold value;

The battery rebound voltage and the threshold value 11.8V that collect are compared, judge that described battery rebound voltage is more than or equal to threshold value 11.8V;

S3044 adopts the first default corresponding relation to obtain battery rebound voltage and determines correcting mode when judging described battery rebound voltage more than or equal to threshold value 11.8V;

When judging described battery rebound voltage more than or equal to threshold value 11.8V, the described first default corresponding relation of employing is described difference and battery remaining power value SOC ₂The corresponding relation of correction, i.e. SOC is spent in the every rising 1 of temperature ₂ Downward modulation 1%;

S3045 adopts the second default corresponding relation to obtain battery rebound voltage and determines correcting mode when judging described battery rebound voltage less than threshold value 11.8V;

When judging described battery rebound voltage less than threshold value 11.8V, the described second default corresponding relation of employing is described difference and battery remaining power value SOC ₂The corresponding relation of correction, i.e. SOC is spent in the every rising 2 of temperature ₂ Downward modulation 1%;

S305 adopts described definite battery remaining power value SOC ₂Computing formula calculates battery remaining power value SOC ₂, and the battery remaining power value SOC that adopts described definite correcting mode corrected Calculation to obtain ₂

The battery remaining power value SOC that the battery rebound voltage that records according to correspondence adopts ₂Computing formula calculate, and the correction that obtained according to the last step and correcting mode are to the battery remaining power value SOC after calculating ₂Revise, obtain revised battery remaining power value SOC ₂

The disclosed battery remaining power measuring method of present embodiment, only need collect battery rebound voltage in the moment of battery off-line can calculate, and does not need to leave standstill for a long time, has solved the long problem of time of repose; And in a single day be zero when detecting battery current among the present invention, can start detection and computation process, realized the on-line measurement of battery remaining power.

The invention also discloses a kind of battery remaining power measuring method, show as Fig. 4, concrete step comprises:

S401 detects battery current;

S402 is when judging that described battery current is zero, gathers the temperature of battery rebound voltage and battery environment of living in;

S403 determines battery remaining power value SOC according to described battery rebound voltage ₂Computing formula;

S404 determines correcting mode according to temperature and the battery rebound voltage of described battery environment of living in;

S405 adopts described definite battery remaining power value SOC ₂Computing formula calculates battery remaining power value SOC ₂, and the battery remaining power value SOC that adopts described definite correcting mode corrected Calculation to obtain ₂

S406 judges described revised battery remaining power value SOC ₂Whether less than 15%;

With described revised battery remaining power value SOC ₂With 15% compare, judge described revised battery remaining power value SOC ₂Whether less than 15%;

S407 is when judging described revised battery remaining power value SOC ₂Less than 15% o'clock, report to the police;

When judging described revised battery remaining power value SOC ₂Less than 15% o'clock, start warning function and report to the police, with prompting user electric weight deficiency.

The disclosed battery remaining power measuring method of present embodiment does not only need to leave standstill for a long time, has solved the long problem of time of repose, and has realized the on-line measurement of battery remaining power; Provide the warning function of electric weight deficiency more for the user, so that the prompting user charges.

The invention also discloses a kind of battery remaining power measuring method, show as Fig. 5, concrete step comprises:

S501 detects battery current;

S502 is when judging that described battery current is zero, gathers the temperature of battery rebound voltage and battery environment of living in;

S503 determines battery remaining power value SOC according to described battery rebound voltage ₂Computing formula;

S504 determines correcting mode according to temperature and the battery rebound voltage of described battery environment of living in;

S505 adopts described definite battery remaining power value SOC ₂Computing formula calculates battery remaining power value SOC ₂, and the battery remaining power value SOC that adopts described definite correcting mode corrected Calculation to obtain ₂

S506 shows described revised battery remaining power value SOC ₂

With described revised battery remaining power value SOC ₂Show, with the current battery remaining power of prompting user.

The disclosed battery remaining power measuring method of present embodiment does not only need to leave standstill for a long time, has solved the long problem of time of repose, and has realized the on-line measurement of battery remaining power; The Presentation Function of electric car residual capacity is provided for the user more, so as the user constantly the residual capacity situation of electrolytic cell.

The invention also discloses a kind of battery remaining power measurement mechanism, as shown in Figure 6, comprising: controller 601, voltage detecting circuit 602, current detection circuit 603 and temperature sensing circuit 604.

Controller 601 links to each other with voltage detecting circuit 602, current detection circuit 603 and temperature sensing circuit 604, be used for to receive the temperature signal of battery current signal, battery rebound voltage signal and battery environment of living in, calculate battery remaining power and according to the temperature of described battery environment of living in battery remaining power is revised;

Voltage detecting circuit 602 links to each other with controller 601, for detection of battery rebound voltage, exports the battery voltage signal that knock-ons to described controller 601;

Current detection circuit 603 links to each other with controller 601, for detection of battery current, exports the battery current signal to described controller 601;

Temperature sensing circuit 604 links to each other with controller 601, for detection of the temperature of described battery environment of living in, exports temperature signal to described controller 601.

Concrete principle of work is as follows:

Current detection circuit 603 detects battery current, exports the battery current signal to described controller 601; Controller 601 receives described battery current signal, judge that described battery current signal is zero, control voltage detecting circuit 602 detects battery rebound voltage, temperature sensing circuit 604 detects the temperature of described batteries environment of living in, and exports the knock-on temperature signal of voltage signal and described battery environment of living in of battery to described controller 601; Controller 601 calculates battery remaining power according to the battery rebound voltage signal that receives, and according to the temperature signal of described battery environment of living in battery remaining power is revised.

So just obtained revised battery remaining power value, battery remaining power measurement mechanism disclosed by the invention, detect battery rebound voltage and export controller 601 to by voltage detecting circuit 602, can calculate the battery remaining power value, do not need to leave standstill for a long time to carry out again after obtaining open-circuit voltage the calculating of battery remaining power, solved the long problem of time of repose; And in a single day be judged as zero when current detection circuit 603 detected battery currents among the present invention, can control 604 pairs of battery rebound voltages of voltage detecting circuit 602 and temperature sensing circuit and environment temperature detects, battery remaining power is calculated, realized the on-line measurement of battery remaining power.

The invention also discloses a kind of battery remaining power measurement mechanism, as shown in Figure 7, comprising: controller 701, voltage detecting circuit 702, current detection circuit 703 and temperature sensing circuit 704; Wherein, controller 701 is 89S51 single-chip microcomputer U1;

P14, the P15 of described 89S51 single-chip microcomputer U1, P16 and P17 mouth link to each other with described voltage detecting circuit 702;

The P32 mouth of described 89S51 single-chip microcomputer U1 links to each other with described current detection circuit 703;

The P33 mouth of described 89S51 single-chip microcomputer U1 links to each other with described temperature sensing circuit 704.

The principle of work that present embodiment is concrete and the effect of realization are same as the previously described embodiments, repeat no more herein.

The invention also discloses a kind of battery remaining power measurement mechanism, as shown in Figure 8, comprising: controller 801, voltage detecting circuit 802, current detection circuit 803 and temperature sensing circuit 804; Wherein, voltage detecting circuit 802 comprises: operational amplifier LM324 chip U2, A/D converter MCP3208 chip U3, first resistance R 1, second resistance R 2, the 3rd resistance R 3 and the 4th resistance R 4;

The negative-phase input of described operational amplifier LM324 chip U2 receives described battery rebound voltage signal, and described battery rebound voltage signal enters the negative-phase input of described operational amplifier LM324 chip U2 via first resistance R 1; The normal phase input end of described operational amplifier LM324 chip U2 receives the 10V reference voltage signal, and described 10V reference voltage signal enters the normal phase input end of described operational amplifier LM324 chip U2 via second resistance R 2; The normal phase input end of described operational amplifier LM324 chip U2 links to each other with output terminal, be connected described the 3rd resistance R 3 between described normal phase input end and the output terminal, the output terminal of described operational amplifier LM324 chip U2 sends simulating signal to described A/D converter MCP3208 chip U3; The negative-phase input of described operational amplifier LM324 chip U2 links to each other with the 4th resistance R 4, the other end ground connection of second resistance R 2; The positive control termination 15V reference voltage signal of described operational amplifier LM324 chip U2; The negative control end ground connection of described operational amplifier LM324 chip U2;

1 mouthful of described A/D converter MCP3208 chip U3 receives the simulating signal that described operational amplifier LM324 chip U2 sends, 9 mouthfuls of described A/D converter MCP3208 chip U3 link to each other with 14 mouthfuls and ground connection, 10 mouthfuls of described A/D converter MCP3208 chip U3 link to each other with the P17 mouth of controller 801,11 mouthfuls of described A/D converter MCP3208 chip U3 link to each other with the P16 mouth of controller 801,12 mouthfuls of described A/D converter MCP3208 chip U3 link to each other with the P15 mouth of controller 801,13 mouthfuls of described A/D converter MCP3208 chip U3 link to each other with the P14 mouth of controller 801, and 16 mouthfuls of described A/D converter MCP3208 chip U3 connect the 5V reference voltage signal.

The principle of work that present embodiment is concrete and the effect of realization are same as the previously described embodiments, repeat no more herein.

The invention also discloses a kind of battery remaining power measurement mechanism, as shown in Figure 9, comprising: controller 901, voltage detecting circuit 902, current detection circuit 903 and temperature sensing circuit 904; Wherein, current detection circuit 903 comprises the 5th resistance R 5 and the 6th resistance R 6:

The 5th resistance R 5 receives described battery current signal, the other end of the 5th resistance R 5 links to each other with the 6th resistance R 6, the other end ground connection of the 6th resistance R 6, the tie point of described the 5th earth resistance R5 and the 6th resistance R 6 is exported described battery current signal, and links to each other with controller 901.

The principle of work that present embodiment is concrete and the effect of realization are same as the previously described embodiments, repeat no more herein.

The invention also discloses a kind of battery remaining power measurement mechanism, as shown in figure 10, comprising: controller 1001, voltage detecting circuit 1002, current detection circuit 1003 and temperature sensing circuit 1004; Wherein, temperature sensing circuit 1004 comprises: digital temperature sensor DS18B20 chip U4 and the 7th resistance R 7:

The VCC end of described digital temperature sensor DS18B20 chip U4 connects voltage VCC and links to each other; The DQ end of described digital temperature sensor DS18B20 chip U4 links to each other with the 7th resistance R 7, and the other end of the 7th resistance R 7 links to each other with controller 1001, and connects voltage VCC; The GND end ground connection of described digital temperature sensor DS18B20 chip U4.

The principle of work that present embodiment is concrete and the effect of realization are same as the previously described embodiments, repeat no more herein.

The invention also discloses a kind of battery remaining power measurement mechanism, as shown in figure 11, except comprising: controller 1101, voltage detecting circuit 1102, current detection circuit 1103 and the temperature sensing circuit 1104, also comprise display circuit 1105, described display circuit 1105 is used for receiving electrokinetic cell remaining capacity signal and the demonstration that described controller 1101 transmits;

Described display circuit 1105 comprises: three-in-one cloudy LED charactron U5,4511 code translator U6,7404 phase inverter U7, the 8th resistance R 8, the 9th resistance R 9, the tenth resistance R 10, the 11 resistance R 11, the 12 resistance R 12, the 13 resistance R 13 and the 14 resistance R 14 altogether;

12 mouthfuls of described three-in-one altogether cloudy LED charactron U5 with described 7404 phase inverter U7 2 mouthfuls link to each other, 9 mouthfuls of described three-in-one altogether cloudy LED charactron U5 with described 7404 phase inverter U7 4 mouthfuls link to each other, and 8 mouthfuls of described three-in-one common cloudy LED charactron U5 with described 7404 phase inverter U7 6 mouthfuls link to each other;

1 mouthful of described 7404 phase inverter U7 links to each other with the P20 mouth of controller 1101, and 3 mouthfuls of described 7404 phase inverter U7 link to each other with the P21 mouth of controller 1101, and 5 mouthfuls of described 7404 phase inverter U7 link to each other with the P22 mouth of controller 1101;

7 mouthfuls of described 4511 code translator U6 link to each other with the P24 mouth of controller 1101,1 mouthful of described 4511 code translator U6 links to each other with the P25 mouth of controller 1101,2 mouthfuls of described 4511 code translator U6 link to each other with the P26 mouth of controller 1101,6 mouthfuls of described 4511 code translator U6 link to each other with the P27 mouth of controller 1101,3 mouthfuls of described 4511 code translator U6 link to each other with 4 mouthfuls and connect the 5V voltage signal, 5 mouthfuls of ground connection of described 4511 code translator U6,13 mouthfuls of described 4511 code translator U6 link to each other with the 8th resistance R 8, and link to each other with 11 mouthfuls of three-in-one altogether cloudy LED charactron U5,12 mouthfuls of 4511 code translator U6 link to each other with the 9th resistance R 9, and link to each other with 7 mouthfuls of three-in-one altogether cloudy LED charactron U5,11 mouthfuls of 4511 code translator U6 link to each other with the tenth resistance R 10, and link to each other with 4 mouthfuls of three-in-one altogether cloudy LED charactron U5,10 mouthfuls of 4511 code translator U6 link to each other with the 11 resistance R 11, and link to each other with 2 mouthfuls of three-in-one altogether cloudy LED charactron U5,9 mouthfuls of 4511 code translator U6 link to each other with the 12 resistance R 12, and link to each other with 1 mouthful of three-in-one altogether cloudy LED charactron U5,15 mouthfuls of 4511 code translator U6 link to each other with the 13 resistance R 13, and link to each other with 10 mouthfuls of three-in-one altogether cloudy LED charactron U5,14 mouthfuls of 4511 code translator U6 link to each other with the 14 resistance R 14, and link to each other the 8th resistance R 8 with 5 mouthfuls of three-in-one altogether cloudy LED charactron U5, the 9th resistance R 9, the tenth resistance R 10, the 11 resistance R 11, the 12 resistance R 12, the other end parallel connection of the 13 resistance R 13 and the 14 resistance R 14 also connects the 5V voltage signal.

Concrete principle of work is: the P24 mouth of controller 1101, P25 mouth, P26 mouth and P27 mouth U6 after 4511 decodings provides the section control signal of three-in-one cloudy LED charactron U5 altogether; The P20 mouth of controller 1101, P21 mouth and P22 mouth provide three three-in-one common port COM signals of cloudy LED charactron U5 altogether through described 7404 phase inverter U7.

Other concrete principle of work of present embodiment are same as the previously described embodiments, repeat no more herein.

Battery remaining power measurement mechanism disclosed by the invention has not only solved the long problem of time of repose, and has realized the on-line measurement of battery remaining power; Provide Presentation Function from hardware facility more, for the user shows battery remaining power constantly.

The invention also discloses a kind of battery remaining power measurement mechanism, as shown in figure 12, except comprising: controller 1201, voltage detecting circuit 1202, current detection circuit 1203 and the temperature sensing circuit 1204, also comprise warning circuit 1205, described warning circuit 1205 is used for receiving the order of described controller 1201 transmission so that the warning of electric weight deficiency to be provided;

Described warning circuit 1205 comprises: hummer U8, triode T1 and the 15 resistance R 15;

Described hummer U8 one end ground connection, the other end links to each other with triode T1 collector, and the emitter of triode T1 connects the 5V voltage signal, and the base stage of triode T1 links to each other with the 15 resistance R 15, and the other end of the 15 resistance R 15 links to each other with the P23 mouth of controller 1201.

Concrete principle of work is: when revised battery remaining power value less than 15% the time, described battery remaining power signal makes triode T1 conducting by the 15 resistance R 15, and hummer U8 is opened, and produces and reports to the police.

Other concrete principle of work of present embodiment are same as the previously described embodiments, repeat no more herein.

Battery remaining power measurement mechanism disclosed by the invention has not only solved the long problem of time of repose, and has realized the on-line measurement of battery remaining power; Provide warning function from hardware facility more, made the user can learn the battery remaining power deficiency, used after the prompting user charges.

The invention also discloses a kind of battery remaining power measurement mechanism, as shown in figure 13, except comprising: controller 1301, voltage detecting circuit 1302, current detection circuit 1303 and the temperature sensing circuit 1304, also comprise storer 1305;

Described storer 1305 comprises: X25024 chip U9 and the 16 resistance R 16;

1 mouthful of described X25024 chip U9 links to each other with the P10 mouth of controller 1301,2 mouthfuls of X25024 chip U9 link to each other with the P11 mouth of controller 1301,5 mouthfuls of X25024 chip U9 link to each other with the P12 mouth of controller 1301,6 mouthfuls of X25024 chip U9 link to each other with the P13 mouth of controller 1301,3 mouthfuls of X25024 chip U9 connect the 5V voltage signal, 7 mouthfuls of X25024 chip U9 link to each other with the 16 resistance R 16, tie point links to each other with the RST mouth of controller 1301, and the other end of the 16 resistance R 16 connects the 5V voltage signal.

Concrete principle of work is: described storer 1305 is used for preserving battery remaining power value or other parameters, and produces reset signal to guarantee the normal operation of described controller 1301.

Other concrete principle of work of present embodiment are same as the previously described embodiments, repeat no more herein.

Battery remaining power measurement mechanism disclosed by the invention has not only solved the long problem of time of repose, and has realized the on-line measurement of battery remaining power; The memory function of parameter more is provided, and can have guaranteed the normal operation of controller.

Each embodiment adopts the mode of going forward one by one to describe in this instructions, and what each embodiment stressed is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.For the disclosed device of embodiment, because it is corresponding with the embodiment disclosed method, so description is fairly simple, relevant part partly illustrates referring to method and gets final product.

To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be apparent concerning those skilled in the art, and defined General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments herein.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the wideest scope consistent with principle disclosed herein and features of novelty.

Claims (13)

1. a battery remaining power measuring method is characterized in that, comprising:

Detect battery current;

When judging that described battery current is zero, gathers the temperature of battery rebound voltage and battery environment of living in;

Determine battery remaining power value SOC according to described battery rebound voltage ₂Computing formula;

Temperature and battery rebound voltage according to described battery environment of living in are determined correcting mode;

Adopt described definite battery remaining power value SOC ₂Computing formula calculates battery remaining power value SOC ₂, and the battery remaining power value SOC that adopts described definite correcting mode corrected Calculation to obtain ₂

2. method according to claim 1 is characterized in that, describedly determines battery remaining power value SOC according to described battery rebound voltage ₂Computing formula comprises:

Judge that whether described battery rebound voltage is more than or equal to threshold value;

When judging described battery rebound voltage more than or equal to threshold value, adopt formula S OC ₂=(0.0052U _t ³-0.1887U _t+ 2.3034U _t-9.394) * 10 ⁴Calculate battery remaining power value SOC ₂

When judging described battery rebound voltage less than threshold value, adopt formula ${\mathrm{SOC}}_2=-{0.0249U}_t^2+{1.0225U}_t-8.2236$ Calculate battery remaining power value SOC ₂

3. method according to claim 1 is characterized in that, described temperature and battery rebound voltage according to described battery environment of living in is determined correcting mode, comprising:

Obtain the temperature of described battery environment of living in;

Calculate the temperature of described battery environment of living in and the difference of reference temperature;

When judging described battery rebound voltage more than or equal to threshold value, adopt the first default corresponding relation to obtain battery rebound voltage and determine correcting mode, when judging described battery rebound voltage less than threshold value, adopt the second default corresponding relation to obtain battery rebound voltage and determine correcting mode, the described first default corresponding relation and the second default corresponding relation are described difference and battery remaining power value SOC ₂The corresponding relation of correction.

4. according to any described method among the claim 1-3, it is characterized in that, also comprise:

Judge described revised battery remaining power value SOC ₂Whether less than 15%;

When judging described revised battery remaining power value SOC ₂Less than 15% o'clock, report to the police.

5. according to any described method among the claim 1-3, it is characterized in that, also comprise: show described revised battery remaining power value SOC ₂

6. a battery remaining power measurement mechanism is characterized in that, comprising: current detection circuit, voltage detecting circuit, temperature sensing circuit and controller, wherein:

Described current detection circuit exports the battery current signal to described controller for detection of battery current;

Described voltage detecting circuit is used for detecting battery rebound voltage when judging that described battery current is zero, exports the battery voltage signal that knock-ons to described controller;

Described temperature sensing circuit is used for detecting the temperature of described battery environment of living in when judging that described battery current is zero, exports temperature signal to described controller;

Described controller is used for receiving the temperature signal of battery rebound voltage signal, battery current signal and battery environment of living in, determines battery remaining power value SOC according to described battery rebound voltage ₂Computing formula; Temperature and battery rebound voltage according to described battery environment of living in are determined correcting mode; Adopt described definite battery remaining power value SOC ₂Computing formula calculates battery remaining power value SOC ₂, and the battery remaining power value SOC that adopts described definite correcting mode corrected Calculation to obtain ₂

7. device according to claim 6 is characterized in that, described controller is the 89S51 single-chip microcomputer;

The P14 of described 89S51 single-chip microcomputer, P15, P16 and P17 mouth link to each other with described voltage detecting circuit;

The P32 mouth of described 89S51 single-chip microcomputer links to each other with described current detection circuit;

The P33 mouth of described 89S51 single-chip microcomputer links to each other with described temperature sensing circuit.

8. device according to claim 7 is characterized in that, described voltage detecting circuit comprises: operational amplifier LM324, A/D chip MCP3208, first resistance, second resistance, the 3rd resistance and the 4th resistance;

The negative-phase input of described operational amplifier LM324 receives described battery rebound voltage signal, and described battery rebound voltage signal enters the negative-phase input of described operational amplifier LM324 via described first resistance; The normal phase input end of described operational amplifier LM324 receives the 10V reference voltage signal, and described 10V reference voltage signal enters the normal phase input end of described operational amplifier LM324 via described second resistance; The normal phase input end of described operational amplifier LM324 links to each other with output terminal, is connected described the 3rd resistance between described normal phase input end and the output terminal, and the output terminal of described operational amplifier LM324 sends simulating signal to described A/D chip MCP3208; The negative-phase input of described operational amplifier LM324 links to each other with described the 4th resistance, the other end ground connection of described second resistance; The positive control termination 15V reference voltage signal of described operational amplifier LM324; The negative control end ground connection of described operational amplifier LM324;

1 mouthful of described A/D chip MCP3208 receives the simulating signal that described operational amplifier LM324 sends, 9 mouthfuls link to each other with 14 mouthfuls and ground connection, 10 mouthfuls of P17 mouths that connect described controller, 11 mouthfuls of P16 mouths that connect described controller, 12 mouthfuls of P15 mouths of exporting digital signals and connecing described controller, 13 mouthfuls of P14 mouths that connect described controller, 16 mouthfuls connect the 5V reference voltage signal.

9. device according to claim 6 is characterized in that, described current detection circuit comprises the 5th resistance and the 6th resistance:

Described the 5th resistance receives described battery current signal, and the other end of described the 5th resistance links to each other with described the 6th resistance, the other end ground connection of described the 6th resistance, and described the 5th earth resistance links to each other with described controller with the tie point of described the 6th resistance.

10. device according to claim 6 is characterized in that, described temperature sensing circuit comprises: digital temperature sensor DS18B20 and the 7th resistance:

The VCC end of described digital temperature sensor DS18B20 connects voltage VCC and links to each other; The DQ end of described digital temperature sensor DS18B20 links to each other with described the 7th resistance, and the other end of described the 7th resistance links to each other with described controller, and connects voltage VCC; The GND end ground connection of described digital temperature sensor DS18B20.

11. according to any described device among the claim 7-10, it is characterized in that, also comprise display circuit, described display circuit is used for receiving electrokinetic cell remaining capacity signal and the demonstration that described controller transmits;

Described display circuit comprises: three-in-one cloudy LED charactron, 4511 code translators, 7404 phase inverters, the 8th resistance, the 9th resistance, the tenth resistance, the 11 resistance, the 12 resistance, the 13 resistance and the 14 resistance altogether;

12 mouthfuls of described three-in-one altogether cloudy LED charactron with described 7404 phase inverters 2 mouthfuls link to each other, 9 mouthfuls of described three-in-one altogether cloudy LED charactron with described 7404 phase inverters 4 mouthfuls link to each other, and 8 mouthfuls of described three-in-one common cloudy LED charactron with described 7404 phase inverters 6 mouthfuls link to each other;

1 mouthful of described 7404 phase inverters links to each other with the P20 mouth of described controller, and 3 mouthfuls of described 7404 phase inverters link to each other with the P21 mouth of described controller, and 5 mouthfuls of described 7404 phase inverters link to each other with the P22 of described controller;

7 mouthfuls of described 4511 code translators link to each other with the P24 mouth of described controller, 1 mouthful of described 4511 code translators links to each other with the P25 mouth of described controller, 2 mouthfuls of described 4511 code translators link to each other with the P26 mouth of described controller, 6 mouthfuls of described 4511 code translators link to each other with the P27 mouth of described controller, 3 mouthfuls of described 4511 code translators link to each other with 4 mouthfuls and connect the 5V voltage signal, 5 mouthfuls of ground connection of described 4511 code translators, 13 mouthfuls of described 4511 code translators link to each other with described the 8th resistance, and link to each other with 11 mouthfuls of described three-in-one altogether cloudy LED charactron, 12 mouthfuls of described 4511 code translators link to each other with described the 9th resistance, and link to each other with 7 mouthfuls of described three-in-one altogether cloudy LED charactron, 11 mouthfuls of described 4511 code translators link to each other with described the tenth resistance, and link to each other with 4 mouthfuls of described three-in-one altogether cloudy LED charactron, 10 mouthfuls of described 4511 code translators link to each other with described the 11 resistance, and link to each other with 2 mouthfuls of described three-in-one altogether cloudy LED charactron, 9 mouthfuls of described 4511 code translators link to each other with described the 12 resistance, and link to each other with 1 mouthful of described three-in-one altogether cloudy LED charactron, 15 mouthfuls of described 4511 code translators link to each other with described the 13 resistance, and link to each other with 10 mouthfuls of described three-in-one altogether cloudy LED charactron, 14 mouthfuls of described 4511 code translators link to each other with described the 14 resistance, and link to each other described the 8th resistance with 5 mouthfuls of described three-in-one altogether cloudy LED charactron, the 9th resistance, the tenth resistance, the 11 resistance, the 12 resistance, the other end parallel connection of the 13 resistance and the 14 resistance also connects the 5V voltage signal.

12. according to any described device among the claim 7-10, it is characterized in that, also comprise warning circuit, described warning circuit is used for receiving the order of described controller transmission so that the warning of electric weight deficiency to be provided;

Described warning circuit comprises: hummer, triode and the 15 resistance;

Described hummer one end ground connection, the other end links to each other with described transistor collector, the emitter of described triode connects the 5V voltage signal, and the base stage of described triode links to each other with described the 15 resistance, and the other end of described the 15 resistance links to each other with the P23 mouth of described controller.

13. according to any described device among the claim 7-10, it is characterized in that, also comprise storer, described storer is used for preserving parameters such as SOC value, warning message, and produces reset signal to guarantee the normal operation of described controller;

Described storer comprises: X25024 chip and the 16 resistance;

1 mouthful of described X25024 chip links to each other with the P10 mouth of described controller, 2 mouthfuls of described X25024 chip link to each other with the P11 mouth of described controller, 5 mouthfuls of described X25024 chip link to each other with the P12 mouth of described controller, 6 mouthfuls of described X25024 chip link to each other with the P13 mouth of described controller, 3 mouthfuls of described X25024 chip connect the 5V voltage signal, 7 mouthfuls of described X25024 chip link to each other with described the 16 resistance, tie point links to each other with the RST mouth of described controller, and the other end of described the 16 resistance connects the 5V voltage signal.

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