CN103091590A

CN103091590A - Series capacitor detection method and device

Info

Publication number: CN103091590A
Application number: CN2013100348439A
Authority: CN
Inventors: 林冬冬
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2013-01-30
Filing date: 2013-01-30
Publication date: 2013-05-08
Anticipated expiration: 2033-01-30
Also published as: CN103091590B

Abstract

The invention discloses a series capacitor detection method and a device, and relates to the technical field of capacitors. Reliability in capacitor series application can be improved. The series capacitor detection method comprises the steps of simultaneously detecting various capacitors in series capacitors, judging whether disabled capacitors exist in the series capacitors, wherein the disabled capacitors are capacitors in a short-circuit condition, an open-circuit condition or a capacitor value aging condition, and when the disabled capacitors exist in the series capacitors, using reserved capacitors for replacing the disabled capacitors. The series capacitor detection method is used for detection of the series capacitors.

Description

A kind of series capacitance detection method and equipment

Technical field

The present invention relates to the capacitance technology field, relate in particular to a kind of series capacitance detection method and equipment.

Background technology

Super capacitor is the larger device of a kind of capacitance, it and the common the same characteristic with rapid charge and rapid discharge of electric capacity, also characteristic with store electrical energy the same as battery.The capacitance of super capacitor is larger, but its withstand voltage is lower, be that the super capacitor magnitude of voltage that can bear is lower, be generally 2V to 3V, and at present, consumer will be higher than 3V to the requirement of voltage mostly, if provide electric energy with super capacitor for consumer, just a plurality of super capacitors need to be together in series forms the withstand voltage that super-capacitor module increases super capacitor.

When super capacitor was connected into super-capacitor module, in super-capacitor module, any one super capacitor was in short-circuit condition, will make the voltage of other super capacitors in super-capacitor module increase, and even caused this super capacitor to lose efficacy over its withstand voltage; Wherein any one super capacitor is in open-circuit condition, will make whole series loop lose return flow path, and cause super capacitor to lose discharge capability; Wherein any one super capacitor is in appearance value ageing state, will make the voltage of this super capacitor increase, and even causes this super capacitor to lose efficacy over its withstand voltage, so the state of Detection capacitance when series connection is used is particularly important.Need to prove, the appearance value is aging refers to electric capacity after use a period of time, the state that the capacitance of electric capacity reduces than the initial capacitance value.

in prior art, when series capacitance is detected, at first to replace the electric capacity in series capacitance with idle capacity, whether then detect superseded electric capacity lost efficacy, repeat said process until all electric capacity in series capacitance all detect complete, but, the reliability of series capacitance when using decided by the probability that series capacitance can be in normal operating conditions, and above-mentioned capacitance determining method need to be replaced each electric capacity in series capacitance one by one with idle capacity, again superseded electric capacity is detected, test period is long, capacitance detecting equipment can't detect inefficacy electric capacity in time, make series capacitance quick-recovery normal operating conditions soon, therefore the reliability of electric capacity when series connection is used is lower.

Summary of the invention

The embodiment of the present invention provides a kind of series capacitance detection method and equipment, the reliability in the time of can improving the capacitances in series application.

For achieving the above object, embodiments of the invention adopt following technical scheme:

First aspect, the embodiment of the present invention provide a kind of series capacitance detection method, comprising:

Each electric capacity in series capacitance is detected simultaneously;

Judge whether there is inefficacy electric capacity in described series capacitance, described inefficacy electric capacity is the electric capacity that is in short-circuit condition, open-circuit condition or appearance value ageing state;

When having inefficacy electric capacity in described series capacitance, replace described inefficacy electric capacity with idle capacity.

In conjunction with the possible implementation of the first of first aspect, described each electric capacity in series capacitance is detected simultaneously comprises:

Simultaneously the magnitude of voltage of the positive and negative electrode of each electric capacity in described series capacitance detected.

In conjunction with the possible implementation of the first of first aspect or first aspect, in the possible implementation of the second, describedly judge whether exist inefficacy electric capacity to comprise in described series capacitance:

If the electric capacity that exists the magnitude of voltage of positive and negative electrode to equate in described series capacitance, the electric capacity that the magnitude of voltage of the described positive and negative electrode of judgement equates is the inefficacy electric capacity that is in short-circuit condition.

In conjunction with the possible implementation of the first of first aspect or first aspect, in the third possible implementation, describedly judge whether exist inefficacy electric capacity to comprise in described series capacitance:

After described series capacitance charging is completed, if exist magnitude of voltage that the electric capacity of fluctuation is arranged in described series capacitance, it is the inefficacy electric capacity that is in open-circuit condition that the magnitude of voltage that judges described positive pole has the constant electric capacity of magnitude of voltage of fluctuation, negative pole, and the magnitude of voltage that described magnitude of voltage has fluctuation to refer to have on the basis of normal voltage value after charging and exceeds the normal voltage variation range changes;

Or stopping described series capacitance charging, and to after described series capacitance discharge, if the decline that exists magnitude of voltage anodal in the Preset Time section to have in described series capacitance to exceed preset range and the constant electric capacity of magnitude of voltage of negative pole, judge described in the Preset Time section magnitude of voltage of positive pole the decline that exceeds preset range and the constant electric capacity of magnitude of voltage of negative pole are arranged is the inefficacy electric capacity that is in open-circuit condition.

In conjunction with the possible implementation of the first of first aspect or first aspect, in the 4th kind of possible implementation, describedly judge whether exist inefficacy electric capacity to comprise in described series capacitance:

In described series capacitance charging process, if existing the cathode voltage value to equal stable state threshold value, negative battery voltage in described series capacitance is 0 electric capacity, judge that it is that 0 electric capacity is the inefficacy electric capacity that is in open-circuit condition that described cathode voltage value equals stable state threshold value, negative battery voltage.

In conjunction with the possible implementation of the first of first aspect or first aspect, in the 5th kind of possible implementation, describedly judge whether exist inefficacy electric capacity to comprise in described series capacitance:

After described series capacitance charging is completed, control the capacitor discharge of k series connection in described series capacitance, wherein, described series capacitance comprises n electric capacity, n 〉=2,2≤k≤n;

Obtain the capacitance of described k electric capacity of connecting according to the final voltage of the starting potential of discharge time, the discharge of the electric capacity of described k series connection and discharge;

A testing capacitance in the electric capacity of the described k of bypass series connection obtains the electric capacity of k-1 series connection;

Control the capacitor discharge of described k-1 series connection;

Obtain the capacitance of described k-1 electric capacity of connecting according to the final voltage of the starting potential of discharge time, the discharge of the electric capacity of described k-1 series connection and discharge;

Measurement capacitance according to the described testing capacitance of capacitance acquisition of the electric capacity of the capacitance of electric capacity of described k series connection and described k-1 series connection;

The measurement capacitance of described testing capacitance and the available capacitance threshold value of described testing capacitance are compared, and described available capacitance threshold value refers to that electric capacity is in the minimum capacitance value of upstate;

If the measurement capacitance of described testing capacitance less than the available capacitance threshold value of described electric capacity, judges that described testing capacitance is in appearance value ageing state.

Second aspect, the embodiment of the present invention provide a kind of series capacitance checkout equipment, comprising:

Detecting unit is used for each electric capacity of series capacitance is detected simultaneously;

Judging unit is used for judging according to the testing result of described detecting unit whether described series capacitance exists inefficacy electric capacity that described inefficacy electric capacity is the electric capacity that is in short-circuit condition, open-circuit condition or appearance value ageing state;

Control module is used for replacing described inefficacy electric capacity with idle capacity when there is inefficacy electric capacity in the described series capacitance of described judgment unit judges.

In the implementation possible in conjunction with the first of second aspect, described detecting unit specifically is used for:

In conjunction with the possible implementation of the first of second aspect or second aspect, in the possible implementation of the second, described series capacitance checkout equipment also comprises:

Secondary power supply, described secondary power supply is connected with described series capacitance, is used for described series capacitance charging.

In conjunction with the first or the possible implementation of the second of second aspect or second aspect, in the third possible implementation, described judging unit specifically is used for:

In conjunction with the first or the possible implementation of the second of second aspect or second aspect, in the 4th kind of possible implementation, described judging unit specifically is used for:

Perhaps, stopping described series capacitance charging, and to after described series capacitance discharge, if the decline that exists magnitude of voltage anodal in the Preset Time section to have in described series capacitance to exceed preset range and the constant electric capacity of magnitude of voltage of negative pole, judge described in the Preset Time section magnitude of voltage of positive pole the decline of preset range and the constant electric capacity of magnitude of voltage of negative pole are arranged is the inefficacy electric capacity that is in open-circuit condition.

In conjunction with the first or the possible implementation of the second of second aspect or second aspect, in the 5th kind of possible implementation, described judging unit specifically is used for:

In conjunction with the first or the possible implementation of the second of second aspect or second aspect, in the 6th kind of possible implementation, described judging unit specifically is used for:

Control the capacitor discharge of described k-1 series connection;

The measurement capacitance of described testing capacitance and the available capacitance threshold value of described testing capacitance are compared;

The third aspect, the embodiment of the present invention provide a kind of series capacitance checkout equipment, and described series capacitance checkout equipment is connected with series capacitance, and described series capacitance comprises n electric capacity, n 〉=2;

Described series capacitance checkout equipment comprises:

At least one complex programmable logic device (CPLD), described CPLD is used for each electric capacity of series capacitance is detected simultaneously, judge and whether have inefficacy electric capacity in described series capacitance, described inefficacy electric capacity is the electric capacity that is in short-circuit condition, open-circuit condition or appearance value ageing state, when having inefficacy electric capacity in described series capacitance, control with idle capacity and replace described inefficacy electric capacity.

In the implementation possible in conjunction with the first of the third aspect, described CPLD comprises m analog-digital converter ADC pin, described m ADC pin is connected with the positive and negative electrode of n electric capacity in described series capacitance respectively, wherein, x ADC pin in the m of described CPLD ADC pin and x+1 ADC pin respectively with described series capacitance in the negative pole of x electric capacity be connected with being connected, be used for simultaneously the magnitude of voltage of the negative pole of x electric capacity of described series capacitance and the magnitude of voltage of positive pole are detected, described 2≤m≤n, described 1≤x≤m.

In conjunction with the possible implementation of the first of the third aspect or the third aspect, in the possible implementation of the second, described CPLD specifically is used for:

In conjunction with the possible implementation of the first of the third aspect or the third aspect, in the third possible implementation, described CPLD specifically is used for:

In conjunction with the possible implementation of the first of the third aspect or the third aspect, in the 4th kind of possible implementation, described CPLD specifically is used for:

In conjunction with the possible implementation of the first of the third aspect or the third aspect, in the 5th kind of possible implementation, described CPLD specifically is used for:

Control the capacitor discharge of described k-1 series connection;

In conjunction with the five kind possible implementation of the third aspect to the third aspect, in the 6th kind of possible implementation, described checkout equipment also comprises:

N P-channel metal-oxide-semiconductor PMOS, each PMOS is connected with the electric capacity that the universal input of described CPLD is exported in GPIO pin, described series circuit respectively, be used for when there is inefficacy electric capacity in described series capacitance, control conducting by described CPLD by the GPIO pin, make described inefficacy capacitive bypass;

N NMOS N-channel MOS N NMOS, described NMOS is connected with GP I O pin, the idle capacity of described CPLD, be used for controlling cut-off by described CPLD by the GPIO pin when there is inefficacy electric capacity in described series capacitance, replace described inefficacy electric capacity with described idle capacity;

, described CPLD also is used for by the GPIO pin controlling described PMOS conducting and making described inefficacy capacitive bypass when there is inefficacy electric capacity in described series capacitance, controls described NMOS cut-off and replaces described inefficacy electric capacity with described idle capacity.

In conjunction with the six kind possible implementation of the third aspect to the third aspect, in the 7th kind of possible implementation, described checkout equipment also comprises:

Direct current is to direct supply DC-DC, and described DC-DC one end is connected with the GPIO pin of described CPLD, and the other end is connected with described series capacitance, is used under the control of the GPIO of described CPLD pin described series capacitance charging.

In conjunction with the seven kind possible implementation of the third aspect to the third aspect, in the 8th kind of possible implementation, described checkout equipment also comprises:

Bipolar junction transistor BJT, the base stage of described BJT is connected with the pin GPIO of described CPLD, the grounded emitter of described BJT, the collector of described BJT is connected with described series capacitance, is used for controlling described series capacitance discharge.

a kind of series capacitance detection method and equipment that the embodiment of the present invention provides, each electric capacity in series capacitance is detected simultaneously, judge whether there is inefficacy electric capacity in described series capacitance, described inefficacy electric capacity is the electric capacity that is in short-circuit condition, open-circuit condition or appearance value ageing state, when having inefficacy electric capacity in described series capacitance, replace described inefficacy electric capacity with idle capacity, with respect to prior art, not one by one each electric capacity in series capacitance to be replaced with idle capacity, again superseded electric capacity is detected, but each electric capacity in series capacitance is detected simultaneously, when inefficacy electric capacity being detected, replace inefficacy electric capacity with idle capacity, inefficacy electric capacity can be detected timely and replace inefficacy electric capacity with idle capacity, make the fast quick-recovery normal operating conditions of series capacitance, therefore, improved the reliability when capacitances in series is used.

Description of drawings

A kind of series capacitance detection method process flow diagram that Fig. 1 provides for the embodiment of the present invention 1;

A kind of method flow diagram that whether has the inefficacy electric capacity that is in short-circuit condition in series capacitance that detects that Fig. 2 provides for the embodiment of the present invention 1;

A kind of series capacitance checkout equipment schematic diagram that Fig. 3 provides for the embodiment of the present invention 1;

A kind of method flow diagram that whether has the inefficacy electric capacity that is in open-circuit condition in series capacitance that detects that Fig. 4 provides for the embodiment of the present invention 1;

There is the oscillogram of the inefficacy electric capacity that is in open-circuit condition in a kind of series capacitance that Fig. 5 provides for the embodiment of the present invention 1;

There is the oscillogram of the inefficacy electric capacity that is in open-circuit condition in the another kind of series capacitance that Fig. 6 provides for the embodiment of the present invention 1;

A kind of method flow diagram that whether has the inefficacy electric capacity that is in appearance value ageing state in series capacitance that detects that Fig. 7 provides for the embodiment of the present invention 1;

A kind of method flow diagram that whether has the inefficacy electric capacity that is in short-circuit condition in series capacitance that detects in the series capacitance charging process that Fig. 8 provides for the embodiment of the present invention 1;

A kind of method flow diagram that whether has the inefficacy electric capacity that is in open-circuit condition in series capacitance that detects in the series capacitance charging process that Fig. 9 provides for the embodiment of the present invention 1;

The another kind of series capacitance checkout equipment schematic diagram that Figure 10 provides for the embodiment of the present invention 2;

Another series capacitance checkout equipment schematic diagram that Figure 11 provides for the embodiment of the present invention 2;

Another series capacitance checkout equipment schematic diagram that Figure 12 provides for the embodiment of the present invention 2.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in 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.

Embodiment 1:

The embodiment of the present invention provides a kind of series capacitance detection method, as shown in Figure 1, comprising:

101, the series capacitance checkout equipment detects simultaneously to each electric capacity in series capacitance.

Preferably, described series capacitance checkout equipment detects the magnitude of voltage of the positive and negative electrode of each electric capacity in described series capacitance simultaneously.

102, the series capacitance checkout equipment judges whether there is inefficacy electric capacity in described series capacitance, and described inefficacy electric capacity is the electric capacity that is in short-circuit condition, open-circuit condition or appearance value ageing state.

Preferably, in described series capacitance charging process or after described series capacitance charging is completed, electric capacity that can be equal according to the magnitude of voltage that whether has positive and negative electrode in series capacitance judges that the equal electric capacity of magnitude of voltage of described positive and negative electrode is the inefficacy electric capacity that is in short-circuit condition.Need to prove, in described series capacitance charging process, because series capacitance is charged, so the magnitude of voltage of the electric capacity of each series connection in series capacitance is less than the stable state threshold value, after described series capacitance charging is completed, because the charging process of series capacitance is completed, so the magnitude of voltage of the electric capacity of each series connection in series capacitance is less than or equal to the stable state threshold value, the magnitude of voltage under two states is unequal.The stable state threshold value refers to the maximum voltage value that series capacitance reaches in charging process.Therefore, the electric capacity that whether exists the magnitude of voltage of positive and negative electrode to equate in can be according to series capacitance in described series capacitance charging process or after the charging of described series capacitance is completed, namely having voltage between positive and negative electrode is 0 electric capacity, judges that the electric capacity that the magnitude of voltage of described positive and negative electrode equates is the inefficacy electric capacity that is in short-circuit condition.Concrete, in described series capacitance charging process or after described series capacitance charging is completed, if the electric capacity that exists the magnitude of voltage of positive and negative electrode to equate in described series capacitance, the electric capacity that the magnitude of voltage of the described positive and negative electrode of judgement equates is the inefficacy electric capacity that is in short-circuit condition.

preferably, after described series capacitance charging is completed, if exist magnitude of voltage that the electric capacity of fluctuation is arranged in described series capacitance, the magnitude of voltage that judges described positive pole has fluctuation, the electric capacity that the magnitude of voltage of negative pole is constant is the inefficacy electric capacity that is in open-circuit condition, the magnitude of voltage that magnitude of voltage has fluctuation to refer to have on the basis of normal voltage value after charging and exceeds the normal voltage variation range changes, the difference that is magnitude of voltage and original magnitude of voltage exceeds the normal variation scope, for example, the magnitude of voltage of certain capacitance cathode is after charging is completed, magnitude of voltage should be constant, under normal circumstances, the variation range of its magnitude of voltage should not exceed original magnitude of voltage ± 5%, if the difference of voltage and original magnitude of voltage surpasses 5% of original magnitude of voltage, can think that the magnitude of voltage of this electric capacity has the magnitude of voltage that exceeds the normal voltage variation range to change, fluctuation has namely appearred.

Preferably, in described series capacitance charging process, if existing the cathode voltage value to equal stable state threshold value, negative battery voltage in described series capacitance is 0 electric capacity, judge that it is that 0 electric capacity is the inefficacy electric capacity that is in open-circuit condition that described cathode voltage value equals stable state threshold value, negative battery voltage.

Preferably, after described series capacitance charging is completed, control the capacitor discharge of k series connection in described series capacitance, wherein, described series capacitance comprises n electric capacity, n 〉=2,2≤k≤n; Obtain the capacitance of described k electric capacity of connecting according to the final voltage of the starting potential of discharge time, the discharge of the electric capacity of described k series connection and discharge; A testing capacitance in the electric capacity of the described k of bypass series connection obtains the electric capacity of k-1 series connection; Control the capacitor discharge of described k-1 series connection; Obtain the capacitance of described k-1 electric capacity of connecting according to the final voltage of the starting potential of discharge time, the discharge of the electric capacity of described k-1 series connection and discharge; Measurement capacitance according to the described testing capacitance of capacitance acquisition of the electric capacity of the capacitance of electric capacity of described k series connection and described k-1 series connection; The measurement capacitance of described testing capacitance and the available capacitance threshold value of described testing capacitance are compared, and described available capacitance threshold value refers to that electric capacity is in the minimum capacitance value of upstate; If the measurement capacitance of described testing capacitance less than the available capacitance threshold value of described electric capacity, judges that described testing capacitance is in appearance value ageing state.

When 103, having inefficacy electric capacity in described series capacitance, the series capacitance checkout equipment is replaced described inefficacy electric capacity with idle capacity.

so, each electric capacity in series capacitance is detected simultaneously, judge whether there is inefficacy electric capacity in described series capacitance, described inefficacy electric capacity is the electric capacity that is in short-circuit condition, open-circuit condition or appearance value ageing state, when having inefficacy electric capacity in described series capacitance, replace described inefficacy electric capacity with idle capacity, with respect to prior art, not one by one each electric capacity in series capacitance to be replaced with idle capacity, again superseded electric capacity is detected, but each electric capacity in series capacitance is detected simultaneously, when inefficacy electric capacity being detected, replace inefficacy electric capacity with idle capacity, inefficacy electric capacity can be detected timely and replace inefficacy electric capacity with idle capacity, make the fast quick-recovery normal operating conditions of series capacitance, therefore, improved the reliability when capacitances in series is used.

Need to prove, power supply and series capacitance can with the consumer conducting, provide electric energy to consumer, generally power supply and consumer conducting, provide electric energy to consumer, the magnitude of voltage of power supply is greater than the magnitude of voltage of series capacitance at this moment, when described power supply breaks down, as the magnitude of voltage of power supply during less than the magnitude of voltage of series capacitance, series capacitance and described consumer conducting, provide electric energy to described consumer, the series capacitance of this moment has namely been completed charging process for the charging completion status.Therefore just need to the electric capacity of each series connection in described series capacitance be detected, judge whether there is the inefficacy electric capacity that is in short-circuit condition, open-circuit condition and appearance value ageing state in this series capacitance by testing result, guarantee that series capacitance can normally provide electric energy to described consumer.

Concrete, the embodiment of the present invention also provides a kind of series capacitance detection method, as shown in Figure 2, comprising:

In embodiment of the present invention Fig. 2, hypothesis detects whether there is inefficacy electric capacity in series capacitance with series capacitance checkout equipment shown in Figure 3.in Fig. 3, the series capacitance checkout equipment comprises: a CPLD (Complex Programmable Logic Device, CPLD), 6 ADC of described CPLD (Analog to Digital Converter, analog-digital converter) pin is ADC5, ADC4, ADC3, ADC2, ADC1 and ADC0, described ADC5, ADC4, ADC3, ADC2, ADC1 and ADC0 respectively with series capacitance in 5 capacitor C 5, C4, C3, C2 and C1 are just, negative pole connects, for example, the 3rd ADC pin ADC3 in 6 ADC pins of described CPLD and the 4th ADC pin ADC4 respectively with this series capacitance in the negative pole of the 4th capacitor C 4 be connected with being connected, be used for simultaneously magnitude of voltage and the anodal magnitude of voltage of the negative pole of the 4th capacitor C 4 are detected.

5 PMOS (Positive channel Metal Oxide Semiconductor, P-channel metal-oxide-semiconductor) be Q5, Q4, Q3, Q2 and Q1, described Q5, Q4, Q3, the grid G of Q2 and Q1 respectively with 5 GPIO (General Purpose Input/Output of CPLD, universal input output) pin GPIO5, GPIO4, GPIO3, GPIO2 is connected with GPIO1, described Q5, Q4, Q3, the source S of Q2 and Q1 respectively with series capacitance in 5 capacitor C 5, C4, C3, C2 is connected positive pole and is connected with C1, described Q5, Q4, Q3, the drain D of Q2 and Q1 respectively with series capacitance in 5 capacitor C 5, C4, C3, C2 is connected negative pole and is connected with C1, be used for when there is inefficacy electric capacity in described series capacitance, described CPLD by the GPIO pin control with inefficacy electric capacity just, the described PMOS conducting that negative pole is connected, make described inefficacy capacitive bypass.

An idle capacity C0 is used for replacing described inefficacy electric capacity when there is inefficacy electric capacity in series capacitance.

A NMOS (Negative channel Metal Oxide Semiconductor, the N NMOS N-channel MOS N) be Q0, the grid G of described Q0 is connected with the GPIO0 pin of described CPLD, the source S of described Q0 is connected with the positive pole of idle capacity C0, the drain D of described Q0 is connected with the negative pole of idle capacity C0, be used for when there is inefficacy electric capacity in described series capacitance, described CPLD controls described NMOS Q0 cut-off by the GPIO0 pin, makes described idle capacity replace described inefficacy electric capacity.

A DC-DC (direct current to direct current, direct current is to direct supply), the end of this DC-DC is connected with the 7th the GPIO pin GPIO6 of described CPLD, the other end is connected with 5 series capacitances, in Fig. 3, the other end of this DC-DC is connected with the positive pole of capacitor C 5, is used under the control of the pin GPIO6 of described CPLD this series capacitance charging.

A BJT (Bipolar Junction Transistor, bipolar junction transistor), the base stage B of this BJT is connected with the 8th the GPIO pin GPIO7 of described CPLD, the emitter E ground connection of described BJT, the collector C of described BJT is connected with series capacitance, in Fig. 3, the collector C of this BJT is connected with the positive pole of capacitor C 5, is used for controlling described series capacitance discharge.

Need to prove, the idle capacity in Fig. 3 also can exist a plurality of, and the number of existence can equate with the number of electric capacity in series capacitance.Electric capacity in Fig. 3 connects successively according to the order of C0, C1, C2, C3, C4, C5, the minus earth of C0, and the positive pole of C5 connects the output of DC-DC, only as example, also can adopt other the order of connection during practical application.Certainly, in the present embodiment, the number of GPIO, ADC, electric capacity, PMOS is only also as example, can select according to actual needs suitable quantity when specifically using.

After the series capacitance charging is completed, detect whether there is the inefficacy electric capacity that is in short-circuit condition in series capacitance with series capacitance checkout equipment shown in Figure 3 in embodiment of the present invention Fig. 2, concrete steps are as follows:

201, CPLD controls the DC-DC unlatching by the GPIO6 pin, makes the series capacitance charging, until charging is completed.

202,6 of CPLD ADC pins detect the magnitude of voltage of the positive and negative electrode of 5 electric capacity in series capacitance simultaneously.

Concrete, as shown in Figure 3, after the series capacitance charging is completed, 6 ADC pin ADC5, ADC4, ADC3, ADC2, ADC1 and the ADC0 of CPLD detect the magnitude of voltage of the positive and negative electrode of 5 capacitor C 5, C4, C3, C2 and C1 in series capacitance respectively, wherein, what pin ADC5 detected is the magnitude of voltage of the positive pole of capacitor C 5, and this magnitude of voltage is designated as V5; Pin ADC4 detects is the magnitude of voltage of the positive pole of the negative pole of capacitor C 5 and capacitor C 4, and this magnitude of voltage is designated as V4; Pin ADC3 detects is the magnitude of voltage of the positive pole of the negative pole of capacitor C 4 and capacitor C 3, and this magnitude of voltage is designated as V3; Pin ADC2 detects is the magnitude of voltage of the positive pole of the negative pole of capacitor C 3 and capacitor C 2, and this magnitude of voltage is designated as V2; Pin ADC1 detects is the magnitude of voltage of the positive pole of the negative pole of capacitor C 2 and capacitor C 1, and this magnitude of voltage is designated as V1; What pin ADC0 detected is the magnitude of voltage of the negative pole of capacitor C 1, and this magnitude of voltage is designated as V0.

If the electric capacity that exists the magnitude of voltage of positive and negative electrode to equate in 203 described series capacitances, the electric capacity that the magnitude of voltage of the described positive and negative electrode of judgement equates is the inefficacy electric capacity that is in short-circuit condition.

example, when capacitor C 5, C4, C3, when C2 and C1 normal operation, the voltage V5 that supposes the positive pole of C5 is 12V, because electric capacity has equalizer circuit and all presses to electric capacity in series connection is used, so when normal operation, the voltage that ADC5 detects to ADC0, be that V5 to V0 should be respectively 12V, 9.6V, 7.2V, 4.8V, 2.4V and 0V, if this series capacitance in the course of the work, ADC5 is respectively 12V to the voltage that ADC0 detects, 9V, 9V, 6V, 3V and 0V, the magnitude of voltage V3 that the magnitude of voltage V4 that ADC4 detects and ADC3 detect equates, namely just exist in this series capacitance, the capacitor C 4 that the magnitude of voltage of negative pole equates, judge just described, the capacitor C 4 that the magnitude of voltage of negative pole equates is for being in the inefficacy electric capacity of short-circuit condition.

204, CPLD controls NMOS Q0 conducting by the GPIO0 pin, replaces described inefficacy electric capacity with idle capacity C0.

example, suppose that described inefficacy electric capacity is C5, the process of replacing described inefficacy capacitor C 5 with idle capacity C0 is specially: CPLD controls the source S of described PMOS Q5 and the anodal conducting of inefficacy capacitor C 5 by the GPIO5 pin, control the negative pole conducting of drain D and the inefficacy capacitor C 5 of described PMOS Q5, electric current in series capacitance passes through the source S of PMOS Q5 successively, grid G and drain D flow into series capacitance from the positive pole of capacitor C 4, make 5 bypasses of inefficacy capacitor C, CPLD controls the source S of NMOS Q0 and the positive pole cut-off of idle capacity C0 by the GPIO0 pin, control the drain D of described NMOS Q0 and the negative pole cut-off of idle capacity C0, electric current in series capacitance directly flows into from the positive pole of idle capacity C0, make idle capacity C0 access series capacitance, replace inefficacy capacitor C 5 with idle capacity C0.

So, adopt series capacitance checkout equipment shown in Figure 3 to detect and whether have the inefficacy electric capacity that is in short-circuit condition in series capacitance, when existence in series capacitance is in the inefficacy electric capacity of short-circuit condition, replace the described inefficacy electric capacity that is in short-circuit condition with idle capacity, the inefficacy electric capacity that is in short-circuit condition can be detected timely and replace the inefficacy electric capacity that is in short-circuit condition with idle capacity, make the fast quick-recovery normal operating conditions of series capacitance, reliability when therefore, having improved the capacitances in series application.

The embodiment of the present invention also provides a kind of series capacitance detection method, as shown in Figure 4, comprising:

After the series capacitance charging is completed, still suppose to detect whether there is the inefficacy electric capacity that is in open-circuit condition in series capacitance with series capacitance checkout equipment shown in Figure 3 in embodiment of the present invention Fig. 4.

401, CPLD controls the DC-DC unlatching by the GPIO6 pin, makes the series capacitance charging, until charging is completed.

402,6 of CPLD ADC pins detect the magnitude of voltage of the positive and negative electrode of 5 electric capacity in series capacitance simultaneously.

Concrete, with shown in Figure 3, after the series capacitance charging is completed, respectively the magnitude of voltage of the positive and negative electrode of 5 capacitor C 5, C4, C3, C2 and C1 in series capacitance is detected with 6 ADC pin ADC5, ADC4, ADC3, ADC2, ADC1 and the ADC0 of CPLD, wherein, what pin ADC5 detected is the magnitude of voltage of the positive pole of capacitor C 5, and this magnitude of voltage is designated as V5; Pin ADC4 detects is the magnitude of voltage of the positive pole of the negative pole of capacitor C 5 and capacitor C 4, and this magnitude of voltage is designated as V4; Pin ADC3 detects is the magnitude of voltage of the positive pole of the negative pole of capacitor C 4 and capacitor C 3, and this magnitude of voltage is designated as V3; Pin ADC2 detects is the magnitude of voltage of the positive pole of the negative pole of capacitor C 3 and capacitor C 2, and this magnitude of voltage is designated as V2; Pin ADC1 detects is the magnitude of voltage of the positive pole of the negative pole of capacitor C 2 and capacitor C 1, and this magnitude of voltage is designated as V1; What pin ADC0 detected is the magnitude of voltage of the negative pole of capacitor C 1, and this magnitude of voltage is designated as V0.

If exist magnitude of voltage that the electric capacity of fluctuation is arranged in 403 described series capacitances, the magnitude of voltage that judges described positive pole has fluctuation, the electric capacity that the magnitude of voltage of negative pole is constant is the inefficacy electric capacity that is in open-circuit condition, and the magnitude of voltage that described magnitude of voltage has fluctuation to refer to have on the basis of normal voltage value after charging and exceeds the normal voltage variation range changes.

Example, if with testing circuit shown in Figure 3, series capacitance is detected, when 6 ADC pin ADC5, ADC4, ADC3, ADC2, ADC1 and the ADC0 of CPLD detect the magnitude of voltage of the positive and negative electrode of 5 capacitor C 5, C4, C3, C2 and C1 in series capacitance respectively, if certain magnitude of voltage in magnitude of voltage V5, V4, V3, V2, V1 and V0 that ADC5, ADC4, ADC3, ADC2, ADC1 and ADC0 detect has fluctuation, the magnitude of voltage that judges described positive pole has fluctuation, and the electric capacity that the magnitude of voltage of negative pole is constant is the inefficacy electric capacity that is in open-circuit condition.

Example, as shown in Figure 5, the figure as a result that when being in open-circuit condition for capacitor C 3,6 of CPLD ADC pin ADC5, ADC4, ADC3, ADC2, ADC1 and ADC0 detect the magnitude of voltage of the positive and negative electrode of 5 capacitor C 5, C4, C3, C2 and C1 in series capacitance respectively, in figure, transverse axis is t detection time, the magnitude of voltage V of the longitudinal axis for detecting, t1 to t2 in the time period magnitude of voltage of capacitor C 4 and C3 fluctuation is arranged, the magnitude of voltage of capacitor C 2 and C1 is substantially constant.Can judge that anodal magnitude of voltage has fluctuation, the capacitor C 3 that the magnitude of voltage of negative pole is constant is the inefficacy electric capacity that is in open-circuit condition.Because the fluctuation of the magnitude of voltage of electric capacity in series capacitance is generally less, so whether have fluctuation to judge whether exist the inefficacy electric capacity that is in open-circuit condition only as a kind of method of testing in embodiment in series capacitance, the possibility of result of judgement is not accurate enough according to magnitude of voltage.

in addition, except 401～403 methods that provide, the embodiment of the present invention also provides the another kind of method that whether has the inefficacy electric capacity that is in open-circuit condition in series capacitance that judges, the method is: stopping described series capacitance charging, and to after described series capacitance discharge, if the decline that exists magnitude of voltage anodal in the Preset Time section to have in described series capacitance to exceed preset range and the constant electric capacity of magnitude of voltage of negative pole, judge that it is the inefficacy electric capacity that is in open-circuit condition that described magnitude of voltage anodal in the Preset Time section has the decline that exceeds preset range and the constant electric capacity of magnitude of voltage of negative pole.

concrete, controlling DC-DC at CPLD by the GPIO6 pin turn-offs, stop series capacitance being charged, and CPLD controls the BJT conducting by the GPIO7 pin, after making the series capacitance discharge, then observe 6 ADC pin ADC5 of CPLD in the Preset Time section, ADC4, ADC3, ADC2, ADC1 and ADC0 are respectively to 5 capacitor C 5 in series capacitance, C4, C3, C2 and C1 are just, the testing result of the magnitude of voltage of negative pole, if 5 capacitor C 5 in series capacitance, C4, C3, the magnitude of voltage of the positive pole of certain electric capacity in C2 and C1 has suddenly the magnitude of voltage of the decline that exceeds preset range and negative pole constant, judge that in this Preset Time section it is the inefficacy electric capacity that is in open-circuit condition that anodal magnitude of voltage has suddenly the decline that exceeds preset range and the constant electric capacity of magnitude of voltage of negative pole.example, suppose that preset range is that 99% of normal voltage value arrives between the normal voltage value, the normal voltage value of supposing capacitor C 3 is 7V, the preset range of capacitor C 3 is when changing between 6.93V to 7V, all belong to the normal variation scope, and in this Preset Time section the magnitude of voltage of the positive pole of capacitor C 3 to be changed to suddenly the magnitude of voltage of 5V and negative pole constant, the magnitude of voltage that judges described positive pole has suddenly the constant capacitor C 3 of the magnitude of voltage of the decline that exceeds preset range and negative pole for being in the inefficacy electric capacity of open-circuit condition, as shown in Figure 6, 6 of CPLD ADC pin ADC5 when being in open-circuit condition for capacitor C 3, ADC4, ADC3, ADC2, ADC1 and ADC0 are respectively to 5 capacitor C 5 in series capacitance, C4, C3, C2 and C1 are just, the figure as a result that the magnitude of voltage of negative pole detects, in figure, transverse axis is t detection time, the magnitude of voltage V of the longitudinal axis for detecting, the t1 magnitude of voltage of capacitor C 3 constantly is 7V, stop series capacitance being charged in the t1 time, t2 to t3 in the time period magnitude of voltage of capacitor C 4 and C3 variation has all occured, wherein, the magnitude of voltage of capacitor C 3 is changed to 5V, the magnitude of voltage of capacitor C 2 and C1 is substantially constant.

404, CPLD controls NMOS Q0 conducting by the GPIO0 pin, replaces described inefficacy electric capacity with idle capacity C0.

So, adopt series capacitance checkout equipment shown in Figure 3 to detect and whether have the inefficacy electric capacity that is in open-circuit condition in series capacitance, when existence in series capacitance is in the inefficacy electric capacity of open-circuit condition, replace the described inefficacy electric capacity that is in open-circuit condition with idle capacity, the inefficacy electric capacity that is in open-circuit condition can be detected timely and replace the inefficacy electric capacity that is in open-circuit condition with idle capacity, make the fast quick-recovery normal operating conditions of series capacitance, reliability when therefore, having improved the capacitances in series application.

The embodiment of the present invention also provides a kind of series capacitance detection method, as shown in Figure 7, comprising:

After the series capacitance charging is completed, still suppose to detect whether there is the inefficacy electric capacity that is in appearance value ageing state in series capacitance with series capacitance checkout equipment shown in Figure 3 in embodiment of the present invention Fig. 7.

701, CPLD controls the DC-DC unlatching by the GPIO6 pin, makes the series capacitance charging, until charging is completed.

702, CPLD controls the BJT conducting by the GPIO7 pin, makes the capacitor discharge of 5 series connection in described series capacitance.

Concrete, after the series capacitance charging is completed, CPLD controls the BJT conducting by the GPIO7 pin, makes 5 capacitor C 5, C4, C3, C2 and C1 discharge in series capacitance, and records T1 discharge time of this series capacitance, the starting potential Va of discharge and the final voltage Vb of discharge.

Need to prove, in the series capacitance discharge process, still to guarantee that series capacitance can provide electric energy to consumer, so the final voltage Vb of the discharge of this series capacitance can not be lower than the first default voltage threshold, described the first voltage threshold is for guaranteeing that series capacitance can provide to consumer the minimum voltage value of electric energy.

703, obtain the capacitance of the electric capacity of described 5 series connection according to the final voltage of the starting potential of discharge time of the electric capacity of described 5 series connection, discharge and discharge.

Concrete, calculate the capacitance C15 of integral body of the electric capacity of 5 series connection according to formula T1=-CRln (Vb/Va), wherein, T1 is the discharge time of this series capacitance; Va is the starting potential of the discharge of this series capacitance; Vb is the final voltage of the discharge of this series capacitance.

704, CPLD obtains the electric capacity of 4 series connection by a testing capacitance in the electric capacity of described 5 series connection of GPIO pin bypass.

Example, suppose that capacitor C 5 is testing capacitance, be about to capacitor C 5 bypasses in series capacitance, obtain 4 series capacitances.Concrete, CPLD controls the source S of described PMOSQ5 and the anodal conducting of inefficacy capacitor C 5 by the GPIO5 pin, control the negative pole conducting of drain D and the inefficacy capacitor C 5 of described PMOS Q5, electric current in series capacitance passes through the source S of PMOS Q5 successively, grid G and drain D flow into series capacitance from the positive pole of capacitor C 4, make 5 bypasses of inefficacy capacitor C, obtain 4 series capacitances that formed by capacitor C 4, C3, C2 and C1.

Need to prove, in order to guarantee that series electrical has enough electric weight and carries out discharge test, the GPIO6 pin that needs CPLD to control described CPLD in discharge process is opened DC-DC, charge to series capacitance, make the voltage of series capacitance return to default second voltage threshold value, described second voltage threshold value is to guarantee that series electrical has the minimum voltage value that enough electric weight carry out discharge test.

705, CPLD controls the BJT conducting by the GPIO7 pin, makes the capacitor discharge of described 4 series connection.

Concrete, CPLD controls the BJT conducting by the GPIO7 pin, makes 4 capacitor C 4, C3, C2 and C1 discharge in series capacitance, and records T2 discharge time of this series capacitance, the starting potential Vc of discharge and the final voltage Vd of discharge.

Need to prove, in these 4 series capacitance discharge processes, still to guarantee that series capacitance can provide electric energy to consumer, so the final voltage Vd of the discharge of this series capacitance can not be lower than the first default voltage threshold, described the first voltage threshold is for guaranteeing that series capacitance can provide to consumer the minimum voltage value of electric energy.

706, obtain the capacitance of the electric capacity of described 4 series connection according to the final voltage of the starting potential of discharge time of the electric capacity of described 4 series connection, discharge and discharge.

Concrete, calculate the capacitance C14 of integral body of the electric capacity of 4 series connection according to formula T2=-CRln (Vd/Vc), wherein, T2 is the discharge time of this series capacitance; Vc is the starting potential of the discharge of this series capacitance; Vd is the final voltage of the discharge of this series capacitance.

707, obtain the measurement capacitance of described testing capacitance according to the capacitance of the electric capacity of the capacitance of the electric capacity of described 4 series connection and described 4 series connection.

Concrete, according to formula

Calculate the capacitance of testing capacitance C5, wherein C15 is the capacitance of the integral body of 5 series capacitances in series capacitance; C14 is the capacitance of the integral body of 4 series capacitances in series capacitance.

708, the measurement capacitance of described testing capacitance and the available capacitance threshold value of described testing capacitance are compared.

Suppose that capacitor C 5 is testing capacitance, and the available capacitance threshold value of C5 is 500 kilo-ohms, with the capacitance C of testing capacitance C5 ₅Compare with the available capacitance threshold value of capacitor C 5.

If the measurement capacitance of 709 described testing capacitances less than the available capacitance threshold value of described electric capacity, judges that described testing capacitance is the inefficacy electric capacity that is in appearance value ageing state.

If the capacitance C of testing capacitance C5 ₅Less than 500 kilo-ohms of the available capacitance threshold values of capacitor C 5, the capacitance that just judges institute's testing capacitance less than the capacitor C 5 of the available capacitance threshold value of electric capacity for being in the inefficacy electric capacity of appearance value ageing state.

710, CPLD controls NMOS Q0 conducting by the GPIO0 pin, replaces described inefficacy electric capacity with idle capacity C0.

So, adopt series capacitance checkout equipment shown in Figure 3 to detect and whether have the inefficacy electric capacity that is in appearance value ageing state in series capacitance, when existence in series capacitance is in the inefficacy electric capacity of appearance value ageing state, replace the described inefficacy electric capacity that is in appearance value ageing state with idle capacity, the inefficacy electric capacity that is in appearance value ageing state can be detected timely and replace the inefficacy electric capacity that is in appearance value ageing state with idle capacity, make the fast quick-recovery normal operating conditions of series capacitance, reliability when therefore, having improved the capacitances in series application.

Need to prove, the series capacitance detection method that the embodiment of the present invention provides can also detect series capacitance in the series capacitance charging process, judges whether there is the inefficacy electric capacity that is in short-circuit condition in this series capacitance.

The embodiment of the present invention also provides a kind of series capacitance detection method, as shown in Figure 8, comprising:

In the series capacitance charging process, still suppose to detect whether there is the inefficacy electric capacity that is in short-circuit condition in series capacitance with series capacitance checkout equipment shown in Figure 3 in embodiment of the present invention Fig. 8.

801, CPLD controls the DC-DC unlatching by the GPIO6 pin, makes the series capacitance charging.

802,6 of CPLD ADC pins detect the magnitude of voltage of the positive and negative electrode of 5 electric capacity in series capacitance simultaneously.

Concrete, with shown in Figure 3, in the series capacitance charging process, respectively the magnitude of voltage of the positive and negative electrode of 5 capacitor C 5, C4, C3, C2 and C1 in series capacitance is detected with 6 ADC pin ADC5, ADC4, ADC3, ADC2, ADC1 and the ADC0 of CPLD, wherein, what pin ADC5 detected is the magnitude of voltage of the positive pole of capacitor C 5, and this magnitude of voltage is designated as V5; Pin ADC4 detects is the magnitude of voltage of the positive pole of the negative pole of capacitor C 5 and capacitor C 4, and this magnitude of voltage is designated as V4; Pin ADC3 detects is the magnitude of voltage of the positive pole of the negative pole of capacitor C 4 and capacitor C 3, and this magnitude of voltage is designated as V3; Pin ADC2 detects is the magnitude of voltage of the positive pole of the negative pole of capacitor C 3 and capacitor C 2, and this magnitude of voltage is designated as V2; Pin ADC1 detects is the magnitude of voltage of the positive pole of the negative pole of capacitor C 2 and capacitor C 1, and this magnitude of voltage is designated as V1; What pin ADC0 detected is the magnitude of voltage of the negative pole of capacitor C 1, and this magnitude of voltage is designated as V0.

If exist the positive and negative electrode magnitude of voltage to equate in 803 described series capacitances and less than the electric capacity of stable state threshold value, the magnitude of voltage of the described positive and negative electrode of judgement equates and is the inefficacy electric capacity that is in short-circuit condition less than the electric capacity of stable state threshold value.

example, when capacitor C 5, C4, C3, when C2 and C1 normal operation, the voltage V5 that supposes the positive pole of the t0 moment C5 in charging process is 8V, because electric capacity has equalizer circuit and all presses to electric capacity in series connection is used, so the t0 in charging normal process constantly, the voltage that ADC5 detects to ADC0, be that V5 to V0 should be respectively 8V, 6.4V, 4.8V, 3.2V, 1.6V and 0V, the stable state threshold value of supposing V4 and V3 is 9V, if this series capacitance in the course of the work, ADC5 is respectively 8V to the voltage that ADC0 detects, 6V, 6V, 4V, 2V and 0V, it is all 6V that the magnitude of voltage V3 that the magnitude of voltage V4 that ADC4 detects and ADC3 detect equates, and less than stable state threshold value 9V, just exist in this series capacitance, the magnitude of voltage of negative pole equates and less than the capacitor C 4 of stable state threshold value, judge just described, the magnitude of voltage of negative pole equate and less than the capacitor C 4 of stable state threshold value for being in the inefficacy electric capacity of short-circuit condition.

804, CPLD controls NMOS Q0 conducting by the GPIO0 pin, replaces described inefficacy electric capacity with idle capacity C0.

So, in the series capacitance charging process, series capacitance is detected, exist when being in the inefficacy electric capacity of short-circuit condition in described series capacitance, replace the described inefficacy electric capacity that is in short-circuit condition with idle capacity, the inefficacy electric capacity that is in short-circuit condition can be detected timely and replace the inefficacy electric capacity that is in short-circuit condition with idle capacity, make the fast quick-recovery normal operating conditions of series capacitance, therefore, improved the reliability when capacitances in series is used.

The series capacitance detection method that the embodiment of the present invention provides can also detect series capacitance in the series capacitance charging process, judges whether there is the inefficacy electric capacity that is in open-circuit condition in this series capacitance.

The embodiment of the present invention also provides a kind of series capacitance detection method, as shown in Figure 9, comprising:

In the series capacitance charging process, still suppose to detect whether there is the inefficacy electric capacity that is in open-circuit condition in series capacitance with series capacitance checkout equipment shown in Figure 3 in embodiment of the present invention Fig. 9.

901, CPLD controls the DC-DC unlatching by the GPIO6 pin, makes the series capacitance charging.

902,6 of CPLD ADC pins detect the magnitude of voltage of the positive and negative electrode of 5 electric capacity in series capacitance simultaneously.

If existing the cathode voltage value to equal stable state threshold value, negative battery voltage in 903 described series capacitances is 0 electric capacity, judge that it is that 0 electric capacity is the inefficacy electric capacity that is in open-circuit condition that described cathode voltage value equals stable state threshold value, negative battery voltage.

example, if with testing circuit shown in Figure 3, series capacitance is detected, 6 ADC pin ADC5 as CPLD, ADC4, ADC3, ADC2, ADC1 and ADC0 are respectively to 5 capacitor C 5 in series capacitance, C4, C3, C2 and C1 are just, when the magnitude of voltage of negative pole detects, if ADC5, ADC4, ADC3, ADC2, the cathode voltage value that ADC1 and ADC0 detect certain electric capacity in 5 electric capacity in this series capacitance equals the stable state threshold value, the magnitude of voltage of negative pole is 0, judge that described cathode voltage value equals the stable state threshold value, the magnitude of voltage of negative pole is that 0 electric capacity is the inefficacy electric capacity that is in open-circuit condition.

Need to prove, when series capacitance has just been begun to charge, the magnitude of voltage of the positive and negative electrode of the electric capacity of each series connection in series capacitance is all 0, if there is the inefficacy electric capacity that is in open-circuit condition in series capacitance in charging process, be in inefficacy electric capacity anodal of open-circuit condition and the magnitude of voltage of the electric capacity of connecting with side of the positive electrode can rise to the stable state threshold value in the moment of the inefficacy electric capacity that open-circuit condition occurs being in, and be in the negative pole of inefficacy electric capacity of open-circuit condition and the magnitude of voltage of the electric capacity of connecting with negative side is 0.

Example, as shown in table 1, the stable state threshold value of supposing series capacitance is 11.5V, initial voltage value is 0V, if magnitude of voltage V5, V4, V3, V2 and V1 that ADC5, ADC4, ADC3, ADC2 and ADC1 detect equal stable state threshold value 11.5V, the magnitude of voltage V0=0V that ADC0 detects, the magnitude of voltage V0 that in the judgement series capacitance, cathode voltage value V1 equals stable state threshold value, negative pole is that 0 capacitor C 1 is for being in the inefficacy electric capacity of open-circuit condition, namely work as V5=V4=V3=V2=V1=11.5V, during V0=0V, capacitor C 1 is for being in the inefficacy electric capacity of open-circuit condition.

If magnitude of voltage V5, V4, V3 and V2 that ADC5, ADC4, ADC3 and ADC2 detect equal stable state threshold value 11.5V, the magnitude of voltage V1 that ADC1 and ADC0 detect and V0 equate, V0=V1=0V, the magnitude of voltage V1 that in the judgement series capacitance, cathode voltage value V2 equals stable state threshold value, negative pole is that 0 capacitor C 2 is for being in the inefficacy electric capacity of open-circuit condition, namely work as V5=V4=V3=V2=11.5V, during V1=V0=0V, capacitor C 2 is for being in the inefficacy electric capacity of open-circuit condition.

If magnitude of voltage V5, V4 that ADC5, ADC4 and ADC3 measure and V3 equal stable state threshold value 11.5V, magnitude of voltage V2, the V1 that ADC2, ADC1 and ADC0 detect and V0 equate, V0=V1=V2=0V, the magnitude of voltage V2 that in the judgement series capacitance, cathode voltage value V3 equals stable state threshold value, negative pole is that 0 capacitor C 3 is for being in the inefficacy electric capacity of open-circuit condition, namely work as V5=V4=V3=11.5V, during V2=V1=V0=0V, capacitor C 3 is for being in the inefficacy electric capacity of open-circuit condition.

If the magnitude of voltage V5 that ADC5 and ADC4 measure and V4 equal stable state threshold value 11.5V, magnitude of voltage V3, V2, V1 and the V0 that ADC3, ADC2, ADC1 and ADC0 detect equates, V3=V2=V1=V0=0V, the magnitude of voltage V3 that in the judgement series capacitance, cathode voltage value V4 equals stable state threshold value, negative pole is that 0 capacitor C 4 is for being in the inefficacy electric capacity of open-circuit condition, namely work as V5=V4=11.5V, during V3=V2=V1=V0=0V, capacitor C 4 is for being in the inefficacy electric capacity of open-circuit condition.

If the magnitude of voltage V5 that ADC5 detects equals stable state threshold value 11.5V, magnitude of voltage V4, V3, V2, V1 and the V0 that ADC4, ADC3, ADC2, ADC1 and ADC0 detect equates, V4=V3=V2=V1=V0=0V, the magnitude of voltage V4 that in the judgement series capacitance, cathode voltage value V5 equals stable state threshold value, negative pole is that 0 capacitor C 5 is for being in the inefficacy electric capacity of open-circuit condition, namely work as V5=11.5V, during V4=V3=V2=V1=V0=0V, capacitor C 5 is for being in the inefficacy electric capacity of open-circuit condition.

Table 1:

904, CPLD controls NMOS Q0 conducting by the GPIO0 pin, replaces described inefficacy electric capacity with idle capacity C0.

So, in the series capacitance charging process, series capacitance is detected, exist when being in the inefficacy electric capacity of open-circuit condition in described series capacitance, replace the described inefficacy electric capacity that is in open-circuit condition with idle capacity, the inefficacy electric capacity that is in open-circuit condition can be detected timely and replace the inefficacy electric capacity that is in open-circuit condition with idle capacity, make the fast quick-recovery normal operating conditions of series capacitance, therefore, improved the reliability when capacitances in series is used.

Embodiment 2:

The embodiment of the present invention provides a kind of series capacitance checkout equipment 100, as shown in figure 10, comprising:

Detecting unit 1001 is used for each electric capacity of series capacitance is detected simultaneously.

Preferably, described detecting unit 1001 specifically is used for:

Judging unit 1002 is used for judging according to the testing result of described detecting unit 1001 whether described series capacitance exists inefficacy electric capacity that described inefficacy electric capacity is the electric capacity that is in short-circuit condition, open-circuit condition or appearance value ageing state.

Preferably, described judging unit 1002 specifically is used for:

After described series capacitance charging is completed, if exist magnitude of voltage that the electric capacity of fluctuation is arranged in described series capacitance, it is the inefficacy electric capacity that is in open-circuit condition that the magnitude of voltage that judges described positive pole has the constant electric capacity of magnitude of voltage of fluctuation, negative pole, and the magnitude of voltage that described magnitude of voltage has fluctuation to refer to have on the basis of normal voltage value after charging and exceeds the normal voltage variation range changes.

Preferably, described judging unit 1002 specifically is used for:

Stopping described series capacitance charging, and to after described series capacitance discharge, if the decline that exists magnitude of voltage anodal in the Preset Time section to have in described series capacitance to exceed preset range and the constant electric capacity of magnitude of voltage of negative pole, judge described in the Preset Time section magnitude of voltage of positive pole the decline that exceeds preset range and the constant electric capacity of magnitude of voltage of negative pole are arranged is the inefficacy electric capacity that is in open-circuit condition.

Preferably, described judging unit 1002 specifically is used for:

After described series capacitance charging is completed, control the capacitor discharge of k series connection in described series capacitance, wherein, described series capacitance comprises n electric capacity, n 〉=2,2≤k≤n.

Obtain the capacitance of described k electric capacity of connecting according to the final voltage of the starting potential of discharge time, the discharge of the electric capacity of described k series connection and discharge.

A testing capacitance in the electric capacity of the described k of bypass series connection obtains the electric capacity of k-1 series connection.

Control the capacitor discharge of described k-1 series connection.

Obtain the capacitance of described k-1 electric capacity of connecting according to the final voltage of the starting potential of discharge time, the discharge of the electric capacity of described k-1 series connection and discharge.

Measurement capacitance according to the described testing capacitance of capacitance acquisition of the electric capacity of the capacitance of electric capacity of described k series connection and described k-1 series connection.

The measurement capacitance of described testing capacitance and the available capacitance threshold value of described testing capacitance are compared, and described available capacitance threshold value refers to that electric capacity is in the minimum capacitance value of upstate.

Control module 1003 is used for replacing described inefficacy electric capacity with idle capacity when there is inefficacy electric capacity in the described judging unit 1002 described series capacitances of judgement.

As shown in figure 11, described series capacitance checkout equipment 100 also comprises:

Secondary power supply 1004, described secondary power supply is connected with described series capacitance, is used for described series capacitance charging.

so, detecting unit detects simultaneously to each electric capacity in series capacitance, whether has inefficacy electric capacity in the described series capacitance of judgment unit judges, and described inefficacy electric capacity is the electric capacity that is in short-circuit condition, open-circuit condition or appearance value ageing state, when having inefficacy electric capacity in described series capacitance, replace described inefficacy electric capacity with idle capacity, with respect to prior art, not one by one each electric capacity in series capacitance to be replaced with idle capacity, again superseded electric capacity is detected, but each electric capacity in series capacitance is detected simultaneously, when inefficacy electric capacity being detected, replace inefficacy electric capacity with idle capacity, inefficacy electric capacity can be detected timely and replace inefficacy electric capacity with idle capacity, make the fast quick-recovery normal operating conditions of series capacitance, therefore, improved the reliability when capacitances in series is used.

Embodiment 3:

The embodiment of the present invention provides a kind of series capacitance checkout equipment, as shown in figure 12, comprising:

Described series capacitance checkout equipment is connected with series capacitance, and described series capacitance comprises that n electric capacity is respectively capacitor C 1, C2 ..., Cn, n 〉=2;

Described series capacitance checkout equipment comprises:

At least one complex programmable logic device (CPLD) 1101, described CPLD1101 is used for each electric capacity of series capacitance is detected simultaneously, judge and whether have inefficacy electric capacity in described series capacitance, described inefficacy electric capacity is the electric capacity that is in short-circuit condition, open-circuit condition or appearance value ageing state, when having inefficacy electric capacity in described series capacitance, control with idle capacity and replace described inefficacy electric capacity.

Described CPLD1101 specifically is used for:

Described CPLD11O1 specifically is used for:

After described series capacitance charging is completed, control the capacitor discharge of k series connection in described series capacitance, wherein, described series capacitance comprises n electric capacity, n 〉=2,2≤k≤n; Obtain the capacitance of described k electric capacity of connecting according to the final voltage of the starting potential of discharge time, the discharge of the electric capacity of described k series connection and discharge; A testing capacitance in the electric capacity of the described k of bypass series connection obtains the electric capacity of k-1 series connection; Control the capacitor discharge of described k-1 series connection; Obtain the capacitance of described k-1 electric capacity of connecting according to the final voltage of the starting potential of discharge time, the discharge of the electric capacity of described k-1 series connection and discharge; Measurement capacitance according to the described testing capacitance of capacitance acquisition of the electric capacity of the capacitance of electric capacity of described k series connection and described k-1 series connection; The measurement capacitance of described testing capacitance and the available capacitance threshold value of described testing capacitance are compared, and described available capacitance threshold value refers to that electric capacity is in the minimum capacitance value of upstate; If the measurement capacitance of described testing capacitance less than the available capacitance threshold value of described electric capacity, judges that described testing capacitance is in appearance value ageing state.

described CPLD1101 comprises m analog-digital converter ADC pin, described m ADC pin is ADC0, ADC1, ADC2, ADCm-1 respectively with described series capacitance in n capacitor C 1, C2, Cn just, negative pole connects, wherein, the 2nd ADC pin ADC1 in the m of described CPLD1101 ADC pin and the 3rd ADC pin ADC2 respectively with described series capacitance in the negative pole of the 2nd capacitor C 2 be connected with being connected, be used for simultaneously magnitude of voltage and the anodal magnitude of voltage of the negative pole of the 2nd capacitor C 2 of described series capacitance are detected, described 2≤m≤n, described 1≤x≤m.

described checkout equipment also comprises: n PMOS1102 is Q1, Q2, Qn, the grid G of each PMOS respectively with n-1 the GPIO pin GPIO1 of described CPLD1101, GPIO2, GPIOn-1 connects, the source S of each PMOS respectively with series capacitance in n capacitor C 1, C2, the positive pole of Cn connects, the drain D of each PMOS respectively with series capacitance in n capacitor C 1, C2, the negative pole of Cn connects, be used for when there is inefficacy electric capacity in described series capacitance, pass through GPIO pin GPIO1 by described CPLD1101, GPIO2, the described PMOS Q1 of one or more controls in GPIOn-1, Q2, one or more conductings in Qn, make described inefficacy capacitive bypass.

NMOS1103, described NMOS1103 is connected with the GPIO0 pin of described CPLD, described idle capacity C0, be used for when there is inefficacy electric capacity in described series capacitance, control described NMOS1103 cut-off by described CPLD1101 by the GPIO0 pin, replace described inefficacy electric capacity with described idle capacity C0.

Described CPLD1101 also is used for by the GPIO pin controlling described PMOS1102 conducting and making described inefficacy capacitive bypass when there is inefficacy electric capacity in described series capacitance, controls described NMOS1103 cut-off and replaces described inefficacy electric capacity with described idle capacity.

Need to prove, the NMOS of the series capacitance checkout equipment that the embodiment of the present invention provides is Q0, idle capacity is C0, in the practical application scene, described NMOS can exist a plurality of, described idle capacity also can exist a plurality of, and the number of described NMOS can equate with the number of described PMOS, and the number of described idle capacity can equate with the number of electric capacity in described series capacitance.

Described checkout equipment also comprises: direct current is to direct supply DC-DC1104, described DC-DC1104 one end is connected with the GPIO pin GPIOn of described CPLD1101, the other end is connected with described series capacitance, is used under the control of the GPIOn of described CPLD1101 pin described series capacitance charging.

Described checkout equipment also comprises: BJT1105, the base stage B of described BJT1105 is connected with the GPIO pin GPIOn+1 of described CPLD1101, the emitter E ground connection of described BJT1105, the collector C of described BJT1105 is connected with described series capacitance, is used for controlling described series capacitance discharge.

so, the series capacitance checkout equipment detects simultaneously to each electric capacity in series capacitance, and judges whether there is inefficacy electric capacity in described series capacitance, and described inefficacy electric capacity is the electric capacity that is in short-circuit condition, open-circuit condition or appearance value ageing state, when having inefficacy electric capacity in described series capacitance, replace described inefficacy electric capacity with idle capacity, with respect to prior art, not one by one each electric capacity in series capacitance to be replaced with idle capacity, again superseded electric capacity is detected, but each electric capacity in series capacitance is detected simultaneously, when inefficacy electric capacity being detected, replace inefficacy electric capacity with idle capacity, inefficacy electric capacity can be detected timely and replace inefficacy electric capacity with idle capacity, make the fast quick-recovery normal operating conditions of series capacitance, therefore, improved the reliability when capacitances in series is used.

The those skilled in the art can be well understood to, and is the convenience described and succinct, the system of foregoing description, and the specific works process of equipment and unit can with reference to the corresponding process in preceding method embodiment, not repeat them here.

In several embodiment that the application provides, should be understood that, disclosed system, equipment and method can realize by another way.For example, apparatus embodiments described above is only schematic, for example, the division of described unit, be only that a kind of logic function is divided, during actual the realization, other dividing mode can be arranged, for example a plurality of unit or assembly can in conjunction with or can be integrated into another system, or some features can ignore, or do not carry out.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, the indirect coupling of equipment or unit or communication connection can be electrically, machinery or other form.

Described unit as separating component explanation can or can not be also physically to separate, and the parts that show as the unit can be or can not be also physical locations, namely can be positioned at a place, perhaps also can be distributed on a plurality of network element.Can select according to the actual needs wherein some or all of unit to realize the purpose of the present embodiment scheme.

In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, can be also that the independent physics of unit comprises, also can be integrated in a unit two or more unit.Above-mentioned integrated unit both can adopt the form of hardware to realize, the form that also can adopt hardware to add SFU software functional unit realizes.

The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion by described protection domain with claim.

Claims

1. a series capacitance detection method, is characterized in that, comprising:

Each electric capacity in series capacitance is detected simultaneously;

2. series capacitance detection method according to claim 1, is characterized in that, described each electric capacity in series capacitance is detected simultaneously comprises:

3. series capacitance detection method according to claim 1 and 2, is characterized in that, describedly judges whether exist inefficacy electric capacity to comprise in described series capacitance:

4. series capacitance detection method according to claim 1 and 2, is characterized in that, describedly judges whether exist inefficacy electric capacity to comprise in described series capacitance:

5. series capacitance detection method according to claim 1 and 2, is characterized in that, describedly judges whether exist inefficacy electric capacity to comprise in described series capacitance:

6. series capacitance detection method according to claim 1 and 2, is characterized in that, describedly judges whether exist inefficacy electric capacity to comprise in described series capacitance:

Control the capacitor discharge of described k-1 series connection;

7. a series capacitance checkout equipment, is characterized in that, comprising:

8. series capacitance checkout equipment according to claim 7, is characterized in that, described detecting unit specifically is used for:

9. according to claim 7 or 8 described series capacitance checkout equipments, is characterized in that, described series capacitance checkout equipment also comprises:

According to claim 7 to 9 arbitrary described series capacitance checkout equipment, it is characterized in that, described judging unit specifically is used for:

11. according to claim 7 to 9 arbitrary described series capacitance checkout equipment, it is characterized in that, described judging unit specifically is used for:

Perhaps, stopping described series capacitance charging, and to after described series capacitance discharge, if the decline that exists magnitude of voltage anodal in the Preset Time section to have in described series capacitance to exceed preset range and the constant electric capacity of magnitude of voltage of negative pole, judge described in the Preset Time section magnitude of voltage of positive pole the decline that exceeds preset range and the constant electric capacity of magnitude of voltage of negative pole are arranged is the inefficacy electric capacity that is in open-circuit condition.

12. according to claim 7 to 9 arbitrary described series capacitance checkout equipment, it is characterized in that, described judging unit specifically is used for:

13. according to claim 7 to 9 arbitrary described series capacitance checkout equipment, it is characterized in that, described judging unit specifically is used for:

Control the capacitor discharge of described k-1 series connection;

14. a series capacitance checkout equipment is characterized in that, described series capacitance checkout equipment is connected with series capacitance, and described series capacitance comprises n electric capacity, n 〉=2;

Described series capacitance checkout equipment comprises:

15. series capacitance checkout equipment according to claim 14, it is characterized in that, described CPLD comprises m analog-digital converter ADC pin, described m ADC pin respectively with described series capacitance in n electric capacity just, negative pole connects, wherein, x ADC pin in the m of described CPLD ADC pin and x+1 ADC pin respectively with described series capacitance in the negative pole of x electric capacity be connected with being connected, be used for simultaneously the magnitude of voltage of the negative pole of x electric capacity of described series capacitance and the magnitude of voltage of positive pole are detected, described 2≤m≤n, described 1≤x≤m.

16. according to claim 14 or 15 described series capacitance checkout equipments is characterized in that, described CPLD specifically is used for:

17. according to claim 14 or 15 described series capacitance checkout equipments is characterized in that, described CPLD specifically is used for:

18. according to claim 14 or 15 described series capacitance checkout equipments is characterized in that, described CPLD specifically is used for:

19. according to claim 14 or 15 described series capacitance checkout equipments is characterized in that, described CPLD specifically is used for:

Control the capacitor discharge of described k-1 series connection;

20. according to claim 14 to 19 arbitrary described series capacitance checkout equipments, it is characterized in that, also comprise:

N P-channel metal-oxide-semiconductor PMO S, each PMOS is connected with the electric capacity that the universal input of described CPLD is exported in GPIO pin, described series circuit respectively, be used for when there is inefficacy electric capacity in described series capacitance, control conducting by described CPLD by the GPIO pin, make described inefficacy capacitive bypass;

N NMOS N-channel MOS N NMOS, described NMOS is connected with GPIO pin, the idle capacity of described CPLD, be used for controlling cut-off by described CPLD by the GPIO pin when there is inefficacy electric capacity in described series capacitance, replace described inefficacy electric capacity with described idle capacity;

21. according to claim 14 to 20 arbitrary described series capacitance checkout equipments, it is characterized in that, also comprise:

22. according to claim 14 to 21 arbitrary described series capacitance checkout equipments, it is characterized in that, also comprise: