CN100554984C - Monitoring voltage device and use the electrical storage device of this monitoring voltage device - Google Patents
Monitoring voltage device and use the electrical storage device of this monitoring voltage device Download PDFInfo
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Abstract
用于测定构成蓄电部的多个电容的各个两端子间电压的电压监视装置中，将充电时的端子间连接点的电压分别电阻分割后得到的分压电压，被连接到切换开关。而且，预先设定用于电阻分割的电阻值，使得切换开关的相邻输入端子之间短路时，变为比在正常充电情况下的分压电压明显大或明显小的电压。
In the voltage monitoring device for measuring the voltage between the terminals of a plurality of capacitors constituting the power storage unit, the divided voltage obtained by resistance-dividing the voltage at the connection point between the terminals during charging is connected to a selector switch. Furthermore, the resistance value for resistance division is set in advance so that when the adjacent input terminals of the selector switch are short-circuited, the voltage becomes significantly higher or lower than the divided voltage in the case of normal charging.
Description
Technical field
The present invention relates to, particularly, the monitoring voltage device in the electrical storage device of a plurality of electric capacity that use series connection or connection in series-parallel connect.
Background technology
In the existing electrical storage device of a plurality of double layer capacitors that use is connected in series, use following method to detect the terminal voltage of each electric capacity.At first, two resistor group that are connected in series are connected to tie point between the double layer capacitor, that is, between each terminal and the ground connection, the voltage (branch pressure voltage) of the link position between this two resistance are input to change-over switch.Microcomputer sends capacitance selection signal to change-over switch, with control its switch.Thus, change-over switch is imported the branch pressure voltage of the electric capacity of being selected by microcomputer to the A/D of microcomputer device.Microcomputer carries out computing to detected like this branch pressure voltage and detects the voltage between terminals of each electric capacity.
The spy opens the 2004-271356 communique and has disclosed this monitoring voltage device.In this monitoring voltage device, use multiplexer, select to connect the combination of a plurality of resistance by multiplexer as change-over switch.
But the interval of the input terminal of multiplexer is very narrow.For this reason, when using multiplexer to be installed to substrate, just might cause such fault: cause short circuit between adjacent input terminal because of the migration of the metal of formation electrode etc. as change-over switch.Like this, be short-circuited between the adjacent input terminal, can't obtain the branch pressure voltage of each correct electric capacity.For this reason, be necessary to detect such short circuit.
As the method that detects the short circuit between the input terminal, consider following method.That is, be not to be the output of branch pressure voltage to be connected to adjacent whole input terminals of change-over switch, thereby carry out voltage detecting, but, the adjacent input terminal ground connection of the input terminal both sides of branch pressure voltage output for example will be connected.If like this, though short circuit between the adjacent input terminal, because branch pressure voltage output Pliers position is to ground connection, so also can detect short circuit easily.But each branch pressure voltage output and ground connection alternately are connected to the input terminal of change-over switch, can only effectively utilize the input terminal of half, inefficiency.Perhaps, just must use big change-over switch, monitoring voltage device itself just becomes huge.
Summary of the invention
The present invention is the monitoring voltage device, even be connected in the change-over switch in each branch pressure voltage output of being cut apart by resistance, under situation that closely-spaced input terminal is connected, also the short circuit that can detect easily between the adjacent input terminal is unusual.Monitoring voltage device of the present invention detects first electric capacity that comprises series connection at least and the voltages that apply that apply the voltage and the second electric capacity two ends Reserve Power Division, the first electric capacity two ends of second electric capacity.This monitoring voltage device has charging circuit, monitoring unit and the control part that the Reserve Power Division is applied charging voltage.Monitoring unit has first fen splenium, first input end, second minute splenium, second input terminal and change-over switch.Splenium utilized a plurality of resistance that the voltage on the tie point of first electric capacity and second electric capacity is carried out dividing potential drop in first minute.The branch pressure voltage of first fen splenium is imported into first input end.Splenium utilized a plurality of resistance that the voltage of the charging circuit side of second electric capacity is carried out dividing potential drop in second minute.Resistance value to these a plurality of resistance is set, and win electric capacity and second electric capacity are had under the situation of same electrical capacity, second fen splenium output branch pressure voltage different with the branch pressure voltage of first fen splenium.Be transfused to second input terminal and the adjacent setting of first input end of the branch pressure voltage of second fen splenium.Change-over switch is selected and is exported in first input end, second input terminal any to control part.Control part is at the selection signal to change-over switch output first input end and second input terminal, and tries to achieve the voltage that applies that applies the voltage and the second electric capacity two ends at the first electric capacity two ends based on the output of change-over switch.And, the resistance value of a plurality of resistance of constituting first fen splenium and second fen splenium is set, when making when first input end between sub and second input terminal short circuit, change-over switch is output as abnormal voltage.The control part basis, the voltage that applies that applies the voltage and the second electric capacity two ends at first two ends of trying to achieve by this abnormal voltage, thus judge short circuit between first input end and second input terminal.Utilize this structure, when being short-circuited, branch pressure voltage output is not in the scope of just often branch pressure voltage.So, can detect the short circuit between the input terminal easily.
Description of drawings
Fig. 1 is the brief configuration figure that comprises the circuit of monitoring voltage device in the first embodiment of the invention.
Equivalent circuit figure when Fig. 2 is the input terminal short circuit of first embodiment of the invention monitoring voltage device.
Fig. 3 is the brief configuration figure that comprises the circuit of monitoring voltage device in the second embodiment of the invention.
Fig. 4 is in second embodiment of the invention, the equivalent circuit figure when being connected in short circuit between the input terminal that input terminal and the temperature that is connected in temperature detecting part of branch pressure voltage output of the branch splenium of monitoring voltage device export.
Fig. 5 A is the time-varying characteristics figure of voltage of the electric capacity tie point just often of second embodiment of the invention monitoring voltage device.
Fig. 5 B is under the state of branch pressure voltage of branch splenium of the electric capacity of the temperature output voltage at temperature detecting part when being higher than full charging, the time-varying characteristics figure of the voltage of the electric capacity tie point during the input terminal short circuit.
Fig. 5 C is under the state of branch pressure voltage of branch splenium of the electric capacity of the temperature output voltage at temperature detecting part when being lower than full charging, the time-varying characteristics figure of the voltage of the electric capacity tie point during the input terminal short circuit.
Fig. 6 is the schematic circuit diagram of temperature detecting part of the monitoring voltage device of third embodiment of the invention.
Fig. 7 is in the third embodiment of the invention, be connected to the input terminal of branch pressure voltage output of the branch splenium of monitoring voltage device, with, when being connected between the input terminal of temperature output of temperature detecting part short circuit, branch pressure voltage is exported the partial circuit figure when selected.
Fig. 8 A is in the third embodiment of the invention, the partial circuit figure of the electrical storage device under the situation of connection in series-parallel double layer capacitor, the partial circuit figure that parallel connection is connected in series.
Fig. 8 B is in the third embodiment of the invention, the partial circuit figure of the electrical storage device under the situation of connection in series-parallel double layer capacitor, the partial circuit figure under the situation that series and parallel connects.
Fig. 8 C is in the third embodiment of the invention, the partial circuit figure of the electrical storage device under the situation of connection in series-parallel double layer capacitor, the double layer capacitor of parallel connection and single double layer capacitor is combined and partial circuit figure under the situation about being connected in series.
Description of reference numerals
1 primary power
2 charging circuits
3 control parts
4 upper control parts
First fen splenium of 5A
Second fen splenium of 5B
The 3rd fen splenium of 5C
6 Reserve Power Divisions
7 change-over switches
8 monitoring units
9 temperature detecting parts
Embodiment
(first embodiment)
Fig. 1 is the basic block diagram that comprises the circuit of monitoring voltage device in the first embodiment of the invention.Equivalent circuit figure when Fig. 2 is the input terminal short circuit of monitoring voltage device in the present embodiment.
First fen splenium promptly, divides the structure of splenium 5A to be: with Reserve Power Division 6, be applied to the tie point voltage V1 of the tie point between capacitor C 1 and the capacitor C 2, to carry out dividing potential drop by a plurality of resistance R 1, R2.Double layer capacitor C1～Cn in the Reserve Power Division 6 (n is the number of electric capacity) is connected in series.First input end promptly, is transfused to the branch pressure voltage of branch splenium 5A on the input terminal IN1.Second fen splenium promptly, divides splenium 5B, with the voltage of charging circuit 2 sides of capacitor C 2 by a plurality of resistance R 3, R4 dividing potential drop.Second input terminal adjacent with input terminal IN1 promptly, is transfused to the branch pressure voltage of branch splenium 5B on the input terminal IN2.Below identical, on each capacitor C 3～Cn, be provided with respectively the voltage of charging circuit 2 sides of each electric capacity branch splenium by a plurality of electric resistance partial pressures.Reserve Power Division 6 is charged to assigned voltage by charging circuit 2.
The signal of change-over switch 7 any from control part 3 reception selector switch SW1～SWn+1.Then, among a plurality of input terminal IN1～INn+1, will (x selects signal, and the voltage of 1≤x≤n+1) as the output of change-over switch 7, outputs to control part 3 corresponding to this input terminal INx that selects signal.
The temperature detecting part 9 of output environment temperature by resistance R 7 and thermistor TH1 dividing potential drop, is exported with voltage between the two reference voltage V ref as temperature output.The output of this temperature by the operational amplifier OP1 as voltage buffer, and is connected to one input terminal IN3 in a plurality of input terminals.
Next, the action of the monitoring voltage device with this spline structure is described.When charging circuit 2 when control part 3 receives the instruction of charging beginning, Reserve Power Division 6 is applied the regulation charging voltage, make Reserve Power Division 6 chargings.At this moment, to applying under the voltage condition with higher of each capacitor C 1～Cn, perhaps under the ambient temperature condition with higher, electric capacity and internal resistance will deteriorations.Therefore, control part 3 monitors that each capacitor C 1～Cn's applies voltage and environment temperature.Obviously surpass setting or environment temperature obviously above so unusual generation of setting if apply voltage, control part 3 is just controlled charging circuit 2, stops charging.According to circumstances, make Reserve Power Division 6 discharges.Like this, control part 3 has alleviated the overload to capacitor C 1～Cn.Yet, though not shown, be provided for the fan of air blast cooling or be used for the cooling water circulation loop and the pump of water-cooled, control part 3 controls they, environment temperature is descended to alleviate overload, this also is fine.
If Reserve Power Division 6 is charged normal, the 2 indication chargings of 3 pairs of charging circuits of control part stop.Change-over switch 7 orders exported the selection signal of selecting which input terminal INxs thereafter.Like this, control part 3 reads from the output of change-over switch 7, and tie point voltage V1～Vn of each capacitor C 1～Cn is at each minute branch pressure voltage VM1～VMn of being obtained by dividing potential drop of splenium.
For example, as shown in Figure 1, utilizing first electric capacity is tie point voltage V1 between capacitor C 1 and the capacitor C 2, and the tie point voltage V2 of charging circuit 2 sides of capacitor C 2, and control part 3 calculates V2-V1, estimates second electric capacity thus, and promptly capacitor C 2 applies voltage.The back will describe this computing in detail.
Next, the detection method of environment temperature is described.Certain reference voltage V ref is used as the resistance R 7 of first resistance and is inversely proportional to temperature and changes the thermistor TH1 dividing potential drop of resistance value.That is, resistance R 7 and thermistor TH1 form the 3rd fen splenium 5C with reference voltage V ref dividing potential drop.Branch pressure voltage (temperature output) VMt by resistance R 7 and thermistor TH1 obtain is connected with the input terminal IN3 of change-over switch 7 by operational amplifier OP1.So control part 3 utilizes the selection signal of input terminal and selects input terminal IN3, read in the temperature output VMt that is used for accounting temperature thus.
Utilize the various voltages obtain like this, what control part 3 was tried to achieve each capacitor C 1～Cn applies voltage and environment temperature.Each applies in the estimated value of voltage and environment temperature, and any is during the situation in the defined threshold scope, by communication output and send unusual to upper control part 4.Each capacitor C 1～Cn applies voltage and environment temperature under the situation in threshold range, and control part 3 continues to monitor in each stipulated time and applies voltage and environment temperature.
Among Fig. 1, the voltage that applies that is applied to capacitor C 2 two ends is V2-V1.Therefore, at first, control part 3 is connected switch SW 1, reads in the branch pressure voltage VM1=V1 * R2/ (R1+R2) of voltage V1 behind electric resistance partial pressure.
Then, behind the control part 3 cut-off switch SW1, connect switch SW 2, read in the branch pressure voltage VM2=V2 * R4/ (R3+R4) of voltage V2 behind electric resistance partial pressure.
Next, specify fault detection method under the situation that adjacent input terminal IN1～INn+1 is short-circuited.As example, situation about being short-circuited between input terminal IN1, the IN2 is described with Fig. 2.Under this state, no matter be under the situation of control part 3 selector switch SW1, still under the situation of selector switch SW2, control part 3 all reads in the resultant voltage value Va of VM1 shown in Figure 2 and VM2.This resultant voltage value Va can represent with (2) formula, in addition // and expression combined resistance value in parallel.
Therefore, 3 that try to achieve by control part, as magnitude of voltage the V2 '-V1 ' that applies voltage at capacitor C 2 two ends, can represent with following (3) formula.
At this, set the value of R1～R4, make VM1=VM2 be false.That is, set resistance value R3, R4, make: under capacitor C 1 situation identical, at the different branch pressure voltage of branch pressure voltage of minute splenium 5B output with branch splenium 5A with capacitor C 2 electric capacitys.Below identical, the resistance value of each minute splenium is set at, make adjacent input terminal INn different with VMn-1 with branch pressure voltage VMn on the INn-1.
And each resistance value R1～R4 is set at predetermined value, and make: when being short-circuited between input terminal IN1, the IN2, the output of change-over switch 7 becomes abnormal voltage, and control part 3 calculates and the visibly different abnormal voltage V1 ' of normal value V1-V2-V2 '.That is, when input terminal IN1, IN2 short circuit, preestablish the resistance value R1～R4 that carries out electric resistance partial pressure, make to detect voltage transition for compare with branch pressure voltage VM1, VM2 under the situation about charging normal, obvious greater or lesser voltage.
When like this setting each resistance, by (2) formula, (3) formula, V2 '-V1 ' that control part 3 is tried to achieve when input terminal IN1 and IN2 are short-circuited fault is the value that is different from the normal value V2-V1 when not having short circuit, that is, and and abnormal voltage.
Afterwards, at V2-V1 and V2 '-V1 ' intermediate settings voltage threshold Vth, make V2 '-V1 '＞Vth＞V2-V1 or V2 '-V1 '＜Vth＜V2-V1 set up.Under the situation of last inequality, can judge:, be normal if Vx+1-Vx does not reach Vth arbitrarily; Surpassing Vth then is short trouble.On the other hand, under the situation of back one inequality, can judge:, then be normal if Vx+1-Vx is greater than Vth arbitrarily; If smaller or equal to Vth, then be short trouble.Thus, control part 3, the capacitor C 1 of trying to achieve according to the abnormal voltage of change-over switch 7 output, C2 two ends respectively apply voltage, judge short circuit between input terminal IN1, the IN2.
V2-V1 is the value of trying to achieve as capacitor C 2 both end voltage.On the other hand, the roughly voltage of each electric capacity can estimate like this: distribute the voltage of the integral body of Reserve Power Division 6 pro rata with the inverse of the static capacity of each electric capacity.Therefore, can both consider the standard deviation of the static capacity of electric capacity, also can determine the normal voltage scope of the voltage of each electric capacity.Can be with the bound of this voltage range as threshold value.
Usually, the upper capacitance voltage Vn of series connection is being cut apart the voltage that obtains, is being no more than in the scope of the upper limit of A/D conversion portion of the microcomputer that constitutes control part 3, each minute the resistance ratio of division of splenium be set to identical.And, if branch pressure voltage VMn-1 is connected with the adjacent input terminal of change-over switch 7 with VMn, just can detect the short circuit between the adjacent input of switch 7 at an easy rate.This is that if the ratio of division in (1) formula is identical, V2-V1 just is 0 because the value of VM1 and VM2 is identical during short circuit.But, because the A/D conversion portion of microcomputer has withstand voltage higher limit, the resistance ratio of division is set at when meeting high-voltage side, diminish near the branch pressure voltage VM1 of the capacitor C 1 of ground connection (GND) current potential.Therefore, the A/D value that reads of microcomputer is subject to the influence of external disturbance.The serial number n of double layer capacitor is big more, and such phenomenon is obvious more.And, if the value about the voltage ratio 0.3V of A/D terminal is low, just increase sharply from the leakage current of A/D terminal.So, just increase from the error that reads of A/D terminal.
Therefore, the branch pressure voltage VM1 of capacitor C 1 is preferably in the upper range of A/D conversion portion of microcomputer big as far as possible.For this reason, resistance ratio of division (the R1+R2)/R2 corresponding with capacitor C 1 and with the corresponding resistance ratio of division of capacitor C 2 (R3+R4)/R4 etc. preferably sets smallerly.
On the other hand, for than capacitor C 3 connected electric capacity on the position of ground connection side, be necessary to be set at the resistance ratio of division big and to be no more than the upper limit of the A/D conversion portion of microcomputer.Thus, make the resistance ratio of division difference of each minute splenium, can improve the mensuration precision of branch pressure voltage.Yet Just because of this, existing method can't detect the short circuit between the input terminal.
In the present embodiment, so that set the resistance value of each minute splenium in the branch pressure voltage VMn of adjacent input terminal INn and the INn-1 mode different with VMn-1.So control part 3 surpasses or during less than defined threshold, judges between the input terminal short circuit has taken place in each electric capacity both end voltage.By said structure and action, can detect the short circuit between the input terminal of change-over switch 7 reliably.In this structure, because branch pressure voltage output can be connected to whole input terminals, so can effectively utilize input terminal.
At this, the concrete example of setting resistance value and resistance ratio of division is described.Among Fig. 1, the serial number n of double layer capacitor is 6, and the full charging voltage between C1～C6 is 12V.In the case, the both end voltage of each electric capacity is respectively 2V.In order to obtain high-precision voltage, the upper voltage limit of the A/D conversion portion of microcomputer is 2.5V in addition.
At first, higher for the value that makes VM1, to be reduced in the charging process influence, among the branch splenium 5A corresponding to capacitor C 1, make R1=866 Ω, R2=866 Ω to the various interference of computing.Ratio of division is (R1+R2)/(R2)=2.When not having short circuit between the input of change-over switch 7 but normal the time, the voltage VM1 of input terminal IN1 is 1V, computing voltage V1 is 2V.
On the other hand, among the branch splenium 5B corresponding to capacitor C 2, make R3=4330 Ω, R4=866 Ω.Ratio of division is (R3+R4)/(R4)=6.When not having short circuit between the input of change-over switch 7 but normal the time, the voltage VM2 of input terminal IN2 is 0.67V, computing voltage V2 is 4V.That is, V2-V1=2V, VM2 are the value different with VM1.
With respect to this, the abnormal voltage Va when being short-circuited between the input terminal IN1 of change-over switch and the IN2 obtains Va=0.875V by (2) formula.Therefore, V2 '-V1 '=5.25-1.75=3.25V.
Thus, for example, be the intermediate value 2.625V of V2-V1 and V2 '-V1 ' if Vth is set to, control part 3 can detect the short circuit between input terminal IN1 and the IN2.Can between V2-V1 and V2 '-V1 ', suitably set Vth.For example, if the electric capacity standard deviation of capacitor C 1～C6 estimates it is 10%, setting the limit threshold value is 1.8V, is lower than under the situation of this threshold value to be judged to be short circuit.And establishing upper limit threshold is 2.2V, is higher than under the situation of this threshold value to be judged to be short circuit.
In addition, set the resistance ratio of division of dividing splenium 5A, make that the value of VM1 is more than the 0.3V, therefore the influence that can suppress to disturb like this, just can set aforementioned value resistance ratio of division in addition.And, in the above stated specification,, also can under lower charged state, judge though be that the voltage of expiring under the situations of charging with Reserve Power Division 6 is the explanation that example is carried out.
(second embodiment)
Fig. 3 is the basic block diagram that comprises the circuit of monitoring voltage device in the second embodiment of the invention.Fig. 4 is connected between the input terminal of exporting with the input terminal of the branch pressure voltage output of the branch splenium of monitoring voltage device and the temperature that is connected in temperature detecting part the equivalent circuit figure during short circuit.Fig. 5 A～Fig. 5 C is time-varying characteristics (time-varyingcharacteristic) figure of the charging voltage of same monitoring voltage device: Fig. 5 A is the time-varying characteristics figure of the voltage of electric capacity tie point just often.Fig. 5 B is under the state of branch pressure voltage of branch splenium of the electric capacity of the temperature output voltage at temperature detecting part when being higher than full charging, the time-varying characteristics figure of the voltage of the electric capacity tie point during the input terminal short circuit.Under the state of the branch pressure voltage of the branch splenium of the electric capacity when the temperature output voltage that Fig. 5 C is illustrated in temperature detecting part is lower than full charging, the time-varying characteristics figure of the voltage of the electric capacity tie point during the input terminal short circuit.
Monitoring voltage device shown in Figure 3, inequality with the position of the input terminal of the temperature output VMt of temperature detecting part 9 in the structure of first embodiment shown in Figure 1.That is, the temperature of temperature detecting part 9 output VMt is connected to input terminal IN2, divides the branch pressure voltage VM2 of splenium 5B to be connected to input terminal IN3.In the case, input terminal IN3 is second terminal that is transfused to branch pressure voltage VM2, and input terminal IN2 is the 3rd terminal that is transfused to temperature output VMt.In addition, identical with the first embodiment structure, the same structure parts are used same tag, therefore omit detailed explanation.
The characteristics of present embodiment are: the input terminal IN2 that receives the temperature output VMt of temperature detecting part 9, with, receive to divide the branch pressure voltage VM1 of splenium 5A or receive the input terminal IN1 of the branch pressure voltage VM2 that divides splenium 5B or IN3 between detection method during short circuit.
Described in first embodiment, short circuit between the input terminal of the change-over switch that applies voltage 7 at supervision capacitor C 1～Cn two ends, can solve by such method: preestablish may detect short circuit each minute splenium resistance value, and the voltage threshold Vth of the fault verification in control part 3.Yet one of the resistance that is used for dividing potential drop in the temperature detecting part 9 is thermistor TH1, and its resistance value changes with temperature, and therefore can't preestablish can be as the resistance value of fault verification.The following describes its reason.
Making Vref is 5V, and the temperature range that is used to revise the temperature characterisitic of electric capacity is from-40 ℃ to+25 ℃.And making R7 is 200k Ω.The resistance value of thermistor TH1 under 25 ℃ is that 10k Ω, temperature characterisitic B constant are under 3400 the situation, and the temperature dependency of VMt is and changes like the exponential function shown in the table 1.
Table 1
| Temperature | TH1 resistance value (k Ω) | VMt(V) |
| -40℃ | 195 | 2.47 |
| -25℃ | 87.5 | 1.52 |
| 0℃ | 27.2 | 0.600 |
| 25℃ | 10.0 | 0.238 |
As shown in table 1, VMt varies with temperature, and has comprised branch pressure voltage VM1 among Fig. 1 and the value of VM2, therefore, can't detect the short circuit between IN2 and the terminals of adjacent thereof, i.e. short circuit between short circuit between IN2 and the IN1 or IN2 and the IN3.
At this, as shown in Figure 3, the thermistor TH1 of resistance R 7 and series connection with it carries out dividing potential drop to reference voltage V ref, has inserted operational amplifier OP1 as voltage buffer between the input terminal IN2 of this branch pressure voltage (temperature output) and change-over switch 7.Utilize this voltage buffer, even under the situation of short circuit between input terminal IN2 and adjacent input terminal IN1 or the IN3, control part 3 also can detect such fault easily.
Below specify this detection method.At first, with Fig. 5 A explanation, there is not short circuit between input terminal IN2 and IN1 or the IN3 and situation about charging normal.Voltage VM1, the VM3 of input terminal IN1, IN3, the track of edge change in voltage just often rises to till the full charging, and corresponding with it, V1, V2 rise shown in Fig. 5 A.
In contrast, the input terminal IN1 of change-over switch 7, IN2 short circuit, the situation during VMt＞VM1 is illustrated with Fig. 5 B.As shown in Figure 4, under the situation of input terminal IN1, IN2 short circuit, the value of being cut apart the branch pressure voltage VM1=V1 * R2/ (R1+R2) that obtains by resistance with V1 just often has nothing to do, and VM1 is fixed to as the output voltage values of the operational amplifier OP1 of voltage buffer (output of=temperature) VMt=Vref * TH1/ (R7+TH1).Particularly, in Reserve Power Division 6 from the 0V at charging beginning initial stage till the full charging voltage of regulation, charging rapidly, under the situation of charging control, suppose the duration of charging in 0 to T short time range, the variation of environment temperature is very little.So voltage VM1, the VMt of input terminal IN1, IN2 are fixed to definite value.So V1 is fixed on the higher value shown in Fig. 5 B.
For this reason, V2-V1 applies voltage, that is, capacitor C 2 two ends apply voltage from the negative voltage at charging initial stage, before full charging, are positive voltage from the negative voltage contravariant.When reaching full charging, capacitor C 2 two ends apply voltage V2-V1 and are detected as unusual little voltage.On the other hand, capacitor C 1 two ends apply voltage V1 and are detected as unusual big voltage.
On the other hand, if when the output of the temperature during short circuit VMt is the situation of the value also littler than the full charging voltage V1 of capacitor C 1, then shown in Fig. 5 C.In other words, control part 3 calculates capacitor C 2 two ends and applies voltage V2-V1 and be unusual big voltage.
Like this, be short-circuited if relate to the part of the temperature output VMt of temperature detecting part 9, the voltage table that applies of capacitor C 1, C2 reveals abnormal operation.Utilize this action, control part 3 detect reduce in the charging apply voltage, charging initial stage electric capacity negative apply voltage or the excessive such abnormal voltage of voltage that applies when completely charging.Based on this testing result, control part 3 detects the input terminal IN2 of temperature output of temperature detecting part 9 and the input terminal IN1 short circuit of adjacent branch pressure voltage.In other words, calculate according to abnormal voltage that cause, input terminal IN1 in the short circuit between input terminal IN2 and input terminal IN1, capacitor C 1, C2 two ends respectively apply voltage, control part 3 is judged short circuit between input terminal IN1, the IN2.
At this moment, set defined threshold respectively, whether charge normal by whether outside threshold value, distinguishing corresponding to each abnormal voltage.In other words, as described above, utilize under the situation about judging the applying voltage of electric capacity two ends of fully charged state, identical with first embodiment, can consider the electric capacity standard deviation of capacitor C 1～C6 and setting threshold.If estimate that the standard deviation of electric capacity is 10%, can make lower threshold is 1.8V, is lower than under this situation to be judged to be short circuit.And also can make upper limit threshold is 2.2V, is higher than under this situation to be judged to be short circuit.Like this, be short-circuited, also can detect easily even comprise the part of the output of temperature detecting part 9.
Under the situation of short circuit between input terminal IN2 and the IN3, divide the branch pressure voltage VM2 of splenium 5B to be fixed to temperature output voltage V Mt.When this situation, equally when being short-circuited between input terminal IN1 and the IN2 also can be detected.In the case, not C1, C2 as the electric capacity of abnormality detection object, but C2, C3.
Utilize said structure, action,, also can carry out short-circuit detecting with simple structure even be short-circuited in the part of the temperature output that comprises temperature detecting part 9.In addition in this structure, because also can connect whole input terminals, so can make full use of input terminal.
In addition, although this short circuit of sentencing between input terminal IN1 or the IN3 is that example is illustrated,, when for example the input terminal of temperature output is the situation of other positions such as input terminal IN4, can detect the short circuit between other input terminals equally.
(the 3rd embodiment)
Fig. 6 is the schematic circuit diagram of temperature detecting part of the monitoring voltage device of third embodiment of the invention.Fig. 7 is the input terminal that is connected to the branch pressure voltage output of the branch splenium of monitoring voltage device, with, when being connected between the input terminal of temperature output of temperature detecting part short circuit, branch pressure voltage is exported the partial circuit figure when selected.
The difference of present embodiment and second embodiment shown in Figure 3 is to use the temperature detecting part 9A of circuit structure shown in Figure 6.In addition structure, roughly the same with the structure of second embodiment, same structure member uses same mark, and omits detailed explanation, and different part explanations is described.
In second embodiment, branch pressure voltage (temperature output) VMt of resistance R 7 and thermistor TH1 is imported into the voltage buffer that operational amplifier OP1 constitutes.Corresponding therewith, in the present embodiment, be transfused to the input terminal IN2 of temperature output VMt, by being connected to set voltage by the switch SW of external control.That is, reference voltage V ref is carried out the resistance R 7 of conduct first resistance of dividing potential drop and thermistor TH1 and constituted branch splenium 5C, divide branch pressure voltage (temperature output) VMt of splenium 5C to be connected to switch SW as the 3rd fen splenium.When switch SW was connected, the tie point between resistance R 7 and the thermistor TH1 was connected to set voltage.In addition, in the present embodiment, making set voltage is ground connection.And switch SW is by control part 3 gauge tap.
Next the action of explanation temperature detecting part 9A just often.Among Fig. 7, do not have short circuit but just often, when change-over switch 7 was selected input terminal except the input terminal IN2 of the temperature output VMt that is connected to temperature detecting part 9A, control part 3 was connected switch SW.Thus, during except temperature detection, input terminal IN2 is a ground connection by the Pliers position usually.
When detected temperatures, control part 3 is selected signal to change-over switch 7 outputs, to select to be connected to the input terminal IN2 of temperature output VMt.At this moment, 3 while of control part cut-off switch SW.Thus, temperature output VMt disconnects from ground connection, and the voltage of input terminal IN2 is temperature output VMt, and control part 3 just can calculate temperature.Then, control part 3 is connected switch SW after trying to achieve the environment temperature of Reserve Power Division.As above gauge tap SW, thus, switch SW only just disconnects when reading temperature output VMt, and the time in addition all connects.
Then, the input terminal IN2 as input shrinkage temperature output VMt is described, and when being connected between the input terminal IN1 of branch pressure voltage VM1 of branch splenium 5A short circuit, detects the method for short circuit.As shown in Figure 7, under the state of input terminal IN1 and IN2 short circuit, change-over switch 7 is selected input terminal IN1.In the case, because switch SW is connected, therefore, divide the branch pressure voltage VM1 of splenium 5A to be grounded.Thereby the voltage of input terminal IN1 is earthing potential.Because input terminal IN1 is the earthing potential of set voltage, control part 3 can detect the short circuit between input terminal IN1 and IN2.
Like this, if detect input terminal IN1, IN2 short circuit has taken place, the temperature that control part 3 is looked the input terminal IN2 that next change-over switch 7 select is output as unusually, does not carry out the temperature computation action.And, control part 3 with the information of such expression short circuit, can not normally obtain the upper control part 4 of information untill further notice of temperature, simultaneously, as required, carry out sending the action of charging halt instruction etc. to charging circuit 2.
As mentioned above, if input terminal IN2 between adjacent input terminal IN1 with it or the input terminal IN3 short circuit has taken place, when change-over switch 7 had been selected input terminal IN1 or input terminal IN3, voltage was set voltage.Therefore, whether the voltage by input terminal IN1 or input terminal IN3 is the so simple judgment standard of set voltage, just can detect whether short circuit has taken place.And by using the represented temperature detecting part 9A of circuit structure among Fig. 6, comparing with second embodiment does not need operational amplifier OP1, and circuit structure can be simpler, and cost is lower.Utilize above structure, action,, and be used to calculate under the situation about being short-circuited between the branch pressure voltage of terminal voltage of electric capacity, also can carry out short-circuit detecting with simpler structure even in the output of the temperature of temperature detecting part 9A.
In addition, the method for detecting short circuit that does not comprise between the input terminal of temperature output is identical with first embodiment.And in this structure, all input terminal also can both connect, so can effectively utilize input terminal.
In addition, though in first embodiment～the 3rd embodiment, a plurality of double layer capacitors all are connected in series, and corresponding to the power specification of Reserve Power Division 6, this also can adopt connection in series-parallel to connect.Fig. 8 A～Fig. 8 C is the partial circuit figure under the situation of connection in series-parallel double layer capacitor.Fig. 8 A is the partial circuit figure of the double layer capacitor parallel connection that will be connected in series; Fig. 8 B is the partial circuit figure under the situation of double layer capacitor series connection that will be connected in parallel; Fig. 8 C is that the double layer capacitor of parallel connection and single double layer capacitor is combined and partial circuit figure under the situation about being connected in series.
Shown in Fig. 8 A, in the series parallel structure of the Reserve Power Division 6 that a plurality of double layer capacitors that will connect are connected in parallel, monitoring unit 8 and identical the getting final product of Reserve Power Division 6 numbers.Shown in Fig. 8 B, in the series parallel structure of the Reserve Power Division 6 that a plurality of double layer capacitors with parallel connection are connected in series, perhaps, the double layer capacitor of parallel connection and single double layer capacitor is combined and in the series parallel structure that is connected in series shown in Fig. 8 C, monitoring unit 8 connects in the mode of the voltage of the tie point of the terminal that monitors the double layer capacitor that when charging voltage is different and gets final product.That is, even in the Reserve Power Division 6 of capacitor C 1 and the structure of connecting with capacitor C 2 again as capacitor C 3 parallel connections of the 3rd electric capacity, the present invention also can be suitable for.And, capacitor C 2 capacitor C 3 that is connected in parallel is also passable.In addition, the number of shunt capacitance is unrestricted.
In first embodiment to the, three embodiments, the big double layer capacitor of electricity capacity is as electric capacity, but is not limited to this.But double layer capacitor is easily because environment temperature causes the decline of electric capacity with keeping voltage.Therefore, present embodiment monitoring voltage device is particularly useful to the electrical storage device that uses double layer capacitor.
Industrial applicibility
Therefore voltage monitoring device of the present invention can easily detect the short trouble between the input terminal, is specially adapted to use vehicle electric capacity, that require high reliability with emergency power supply etc.
Claims (5)
1, a kind of monitoring voltage device is used for detecting and comprises first electric capacity that is connected in series and the voltages that apply that apply voltage and the described second electric capacity two ends Reserve Power Division, the described first electric capacity two ends of second electric capacity at least, and described monitoring voltage device comprises:
Charging circuit, it is used for applying charging voltage to described Reserve Power Division;
Monitoring unit, it comprises:
First fen splenium, it uses a plurality of resistance that the voltage on the tie point of described first electric capacity and described second electric capacity is carried out dividing potential drop;
First input end, it is transfused to the branch pressure voltage of described first minute splenium;
Second fen splenium, it uses a plurality of resistance that the voltage of the described charging circuit side of described second electric capacity is carried out dividing potential drop, resistance value is set to, make under described first electric capacity situation identical the different branch pressure voltage of branch pressure voltage of the output of described second minute splenium and described first minute splenium with the electric capacity of described second electric capacity;
Second input terminal, it is transfused to the branch pressure voltage of described second minute splenium;
Temperature detecting part, it further comprises: the 3rd fen splenium, it is by with first resistance of reference voltage dividing potential drop and thermistor and constitute; And operational amplifier, it is as the voltage buffer that is transfused to the branch pressure voltage of described the 3rd minute splenium; Described temperature detecting part is exported the voltage of the tie point between described first resistance and the described thermistor, exports as temperature;
The 3rd input terminal, it is transfused to described temperature output; And
Change-over switch, it is used for selecting one of described first input end, second input terminal, the 3rd input terminal to export;
And,
Control part, it is used for exporting to described change-over switch the selection signal of described first input end, second input terminal, the 3rd input terminal, based on the output of described change-over switch and try to achieve the voltage that applies that applies voltage and the described second electric capacity two ends at the described first electric capacity two ends, and, export the environment temperature of trying to achieve described Reserve Power Division based on described temperature;
Wherein,
The resistance value that constitutes described a plurality of resistance of described first minute splenium and described second minute splenium is set to, make between described first input end and described second input terminal, be short-circuited in, described change-over switch is output as abnormal voltage;
Described control part according to the voltage that applies that applies voltage and the described second electric capacity two ends at the described first electric capacity two ends of trying to achieve from described abnormal voltage, and is judged and is short-circuited between described first input end and described second input terminal; Abnormal voltage according to described first input end that takes place during short circuit between described the 3rd input terminal and described first input end, the voltage that applies that applies voltage and the described second electric capacity two ends at the described first electric capacity two ends of trying to achieve, and judge between described first input end and described the 3rd input terminal and be short-circuited.
2, a kind of monitoring voltage device, it is used for detecting and comprises first electric capacity that is connected in series and the voltages that apply that apply voltage and the described second electric capacity two ends Reserve Power Division, the described first electric capacity two ends of second electric capacity at least, and described monitoring voltage device comprises:
Charging circuit, it is used for applying charging voltage to described Reserve Power Division;
Monitoring unit, it comprises:
First fen splenium, it uses a plurality of resistance that the voltage on the tie point of described first electric capacity and described second electric capacity is carried out dividing potential drop;
First input end, it is transfused to the branch pressure voltage of described first minute splenium;
Second fen splenium, it uses a plurality of resistance that the voltage of the described charging circuit side of described second electric capacity is carried out dividing potential drop, resistance value is set to, make under described first electric capacity situation identical the different branch pressure voltage of branch pressure voltage of the output of described second minute splenium and described first minute splenium with the electric capacity of described second electric capacity;
Second input terminal, it is transfused to the branch pressure voltage of described second minute splenium;
Temperature detecting part, it further comprises: the 3rd fen splenium, it is by with first resistance of reference voltage dividing potential drop and thermistor and constitute; And switch, it is transfused to the voltage of the tie point between described first resistance and the described thermistor, when connecting, the tie point between described first resistance and the described thermistor is connected to set voltage; Described temperature detecting part is exported the voltage of the tie point between described first resistance and the described thermistor, exports as temperature; And,
The 3rd input terminal, it is transfused to described temperature output; And
Change-over switch, it is used for selecting one of described first input end, second input terminal, the 3rd input terminal to export,
And,
Control part, it is used for exporting described first input end to described change-over switch, second input terminal, the selection signal of the 3rd input terminal, based on the output of described change-over switch and try to achieve the voltage that applies that applies voltage and the described second electric capacity two ends at the described first electric capacity two ends, and, when detected temperatures, export described selection signal to described change-over switch, to select described the 3rd input terminal, disconnect described switch simultaneously, and, the environment temperature of trying to achieve described Reserve Power Division exported based on described temperature, after trying to achieve described environment temperature, connect described switch, wherein
The resistance value that constitutes described a plurality of resistance of described first minute splenium and described second minute splenium is set to, make between described first input end and described second input terminal, be short-circuited in, described change-over switch is output as abnormal voltage;
Described control part according to the voltage that applies that applies voltage and the described second electric capacity two ends at the described first electric capacity two ends of trying to achieve from described abnormal voltage, and is judged and is short-circuited between described first input end and described second input terminal; When in described the 3rd input terminal and described first input end or described second input terminal, being short-circuited between any, obtain described set voltage by from described first input end and described second input terminal any, detect the short circuit between any in sub or described second input terminal of described the 3rd input terminal and described first input end thus.
3, a kind of electrical storage device comprises:
At least comprise first electric capacity that is connected in series and the Reserve Power Division of second electric capacity; And
Monitoring voltage device as claimed in claim 1 or 2.
4, electrical storage device as claimed in claim 3, wherein, described Reserve Power Division further comprise with described first electric capacity and described second electric capacity in the 3rd electric capacity that is in parallel.
5, electrical storage device as claimed in claim 3, wherein, described first electric capacity and described second electric capacity are double layer capacitors.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
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| JP2005243850 | 2005-08-25 | ||
| JP243850/2005 | 2005-08-25 | ||
| JP243850/2004 | 2005-08-25 | ||
| JP309355/2005 | 2005-10-25 |
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| CN100554984C true CN100554984C (en) | 2009-10-28 |
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| TWI790966B (en) * | 2022-05-10 | 2023-01-21 | 茂達電子股份有限公司 | Switching charger for supplying stable power |
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| KR100973142B1 (en) * | 2010-04-01 | 2010-07-29 | 이대교 | Power compensating device for electric load on vehicle using edlc and method therefor |
| DE102010028086A1 (en) * | 2010-04-22 | 2011-10-27 | Robert Bosch Gmbh | Method for measuring current and temperature in motor car, involves switching power supply for measuring temperature, and measuring another measuring voltage falling at measuring resistor and temperature-dependent resistor |
| CN103802483B (en) * | 2013-12-26 | 2016-08-31 | 珠海艾派克微电子有限公司 | A kind of print cartridge, ink box chip and chip method for detecting short circuit |
| JP6594952B2 (en) * | 2015-03-11 | 2019-10-23 | 日立オートモティブシステムズ株式会社 | Battery management device, battery monitoring circuit, control system |
| CN105589045B (en) * | 2015-12-10 | 2019-03-26 | 哈尔滨工业大学 | A kind of batteries in parallel connection group excess temperature broken circuit detecting method |
| JP7067556B2 (en) * | 2017-06-20 | 2022-05-16 | 株式会社Ｇｓユアサ | Failure diagnosis device |
| JP2020010493A (en) * | 2018-07-06 | 2020-01-16 | 東芝テック株式会社 | Charging device and program |
| US11215676B2 (en) * | 2019-01-03 | 2022-01-04 | Forcelead Technology Corp. | Power circuit and detection circuit thereof |
| CN111313373B (en) * | 2020-03-25 | 2022-11-29 | 广州华凌制冷设备有限公司 | Power supply circuit, circuit fault detection method, circuit board and vehicle-mounted air conditioner |
| CN111551811A (en) * | 2020-05-26 | 2020-08-18 | 无锡友达电子有限公司 | Detection circuit and device for output state of charging equipment and charging equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI790966B (en) * | 2022-05-10 | 2023-01-21 | 茂達電子股份有限公司 | Switching charger for supplying stable power |
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