CN103091590B

CN103091590B - A kind of series capacitance detection method and equipment

Info

Publication number: CN103091590B
Application number: CN201310034843.9A
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: 2015-09-09
Anticipated expiration: 2033-01-30
Also published as: CN103091590A

Abstract

The invention discloses a kind of series capacitance detection method and equipment, relate to capacitance technology field, reliability during capacitances in series application can be improved.This series capacitance detection method, comprising: detect each electric capacity in series capacitance simultaneously; Judge whether there is inefficacy electric capacity in described series capacitance, described inefficacy electric capacity is the electric capacity being in short-circuit condition, open-circuit condition or capacitance ageing state; When there is inefficacy electric capacity in described series capacitance, replace described inefficacy electric capacity with idle capacity.The present invention is used for the detection to series capacitance.

Description

A kind of series capacitance detection method and equipment

Technical field

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

Background technology

Super capacitor is the device that a kind of capacitance is larger, its characteristic with rapid charge and rapid discharge the same as common electric capacity, the also characteristic with store electrical energy the same as battery.The capacitance of super capacitor is larger, but its withstand voltage is lower, namely the super capacitor magnitude of voltage that can bear is lower, be generally 2V to 3V, and at present, the requirement of most consumer to voltage is higher than 3V, if with super capacitor for consumer provides electric energy, just needs multiple super capacitor to be together in series composition super-capacitor module to increase the withstand voltage of super capacitor.

When super capacitor is connected into super-capacitor module, in super-capacitor module, any one super capacitor is in short-circuit condition, will make the voltage rise of other super capacitors in super-capacitor module, even exceedes its withstand voltage and causes this super capacitor to lose efficacy; Wherein any one super capacitor is in open-circuit condition, whole series loop will be made to lose return flow path, and cause super capacitor to lose discharge capability; Wherein any one super capacitor is in capacitance ageing state, will make the voltage rise of this super capacitor, and even exceedes its withstand voltage and cause this super capacitor to lose efficacy, so the state of Detection capacitance when connecting application is particularly important.It should be noted that, capacitance is aging refer to that electric capacity uses a period of time after, the state that the capacitance of electric capacity reduces compared with initial capacitance value.

In prior art, when series capacitance is detected, first with idle capacity, the electric capacity in series capacitance is replaced, then detect superseded electric capacity whether to lose efficacy, repeat said process until all electric capacity in series capacitance all detect complete, but, the probability that the reliability of series capacitance when applying can be in normal operating conditions by series capacitance decides, and above-mentioned capacitance determining method needs to replace 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 cannot detect inefficacy electric capacity in time, make series capacitance cannot quick-recovery normal operating conditions soon, therefore the reliability of electric capacity when connecting application is lower.

Summary of the invention

Embodiments provide a kind of series capacitance detection method and equipment, reliability during capacitances in series application can be improved.

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

First aspect, embodiments provides 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 being in short-circuit condition, open-circuit condition or capacitance ageing state;

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

In the first the possible implementation in conjunction with first aspect, describedly detection carried out to each electric capacity in series capacitance simultaneously comprise:

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

In conjunction with the first possible implementation of first aspect or first aspect, in the implementation that the second is possible, describedly judge that whether there is inefficacy electric capacity in described series capacitance comprises:

If there is the electric capacity that the magnitude of voltage of positive and negative electrode is equal in described series capacitance, judge that the electric capacity that the magnitude of voltage of described positive and negative electrode is equal is the inefficacy electric capacity being in short-circuit condition.

In conjunction with the first possible implementation of first aspect or first aspect, in the implementation that the third is possible, describedly judge that whether there is inefficacy electric capacity in described series capacitance comprises:

After described series capacitance charging complete, the electric capacity that magnitude of voltage has fluctuation if exist in described series capacitance, judge that the magnitude of voltage of described positive pole has fluctuation, electric capacity that the magnitude of voltage of negative pole is constant is the inefficacy electric capacity being in open-circuit condition, there is the magnitude of voltage change exceeding normal voltage variation range on the basis that described magnitude of voltage has fluctuation to refer to normal voltage value after charging;

Or in stopping, described series capacitance is charged, and to after described series capacitance electric discharge, if there is the magnitude of voltage of positive pole in preset time period in described series capacitance have the decline that exceeds preset range and the constant electric capacity of the magnitude of voltage of negative pole, judge described in preset time period the magnitude of voltage of positive pole have the decline that exceeds preset range and the constant electric capacity of the magnitude of voltage of negative pole is the inefficacy electric capacity being in open-circuit condition.

In conjunction with the first possible implementation of first aspect or first aspect, in the 4th kind of possible implementation, describedly judge that whether there is inefficacy electric capacity in described series capacitance comprises:

In described series capacitance charging process, if exist in described series capacitance, cathode voltage value equals stable state threshold value, negative battery voltage is the electric capacity of 0, judges that the electric capacity that described cathode voltage value equals stable state threshold value, negative battery voltage is 0 is the inefficacy electric capacity being in open-circuit condition.

In conjunction with the first possible implementation of first aspect or first aspect, in the 5th kind of possible implementation, describedly judge that whether there is inefficacy electric capacity in described series capacitance comprises:

After described series capacitance charging complete, 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;

The capacitance of the electric capacity that described k is connected is obtained according to the discharge time of electric capacity of described k series connection, the final voltage of the starting potential of electric discharge and electric discharge;

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

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

The capacitance of the electric capacity that described k-1 is connected is obtained according to the discharge time of electric capacity of described k-1 series connection, the final voltage of the starting potential of electric discharge and electric discharge;

The measurement capacitance of described testing capacitance is obtained according to the capacitance of the electric capacity of described k series connection and the capacitance of described k-1 electric capacity of connecting;

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

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

Second aspect, embodiments provides a kind of series capacitance checkout equipment, comprising:

Detecting unit, for detecting each electric capacity in series capacitance simultaneously;

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

Control module, during for judging to there is inefficacy electric capacity in described series capacitance at described judging unit, replaces described inefficacy electric capacity with idle capacity.

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

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

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

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

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

Or, in stopping, described series capacitance is charged, and to after described series capacitance electric discharge, if there is the magnitude of voltage of positive pole in preset time period in described series capacitance have the decline that exceeds preset range and the constant electric capacity of the magnitude of voltage of negative pole, judge described in preset time period the magnitude of voltage of positive pole have the decline of preset range and the constant electric capacity of the magnitude of voltage of negative pole is the inefficacy electric capacity being in open-circuit condition.

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

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

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

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

The third aspect, embodiments provides 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 detecting each electric capacity in series capacitance simultaneously, judge whether there is inefficacy electric capacity in described series capacitance, described inefficacy electric capacity is the electric capacity being in short-circuit condition, open-circuit condition or capacitance ageing state, when there is inefficacy electric capacity in described series capacitance, control idle capacity replaces described inefficacy electric capacity.

In conjunction with in the first possible implementation 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 the electric capacity of the n in described series capacitance respectively, wherein, an xth ADC pin in m the ADC pin of described CPLD and a (x+1)th ADC pin are connected with the negative pole of the electric capacity of the xth in described series capacitance and positive pole respectively, for detecting the magnitude of voltage of negative pole of the electric capacity of the xth in described series capacitance and the magnitude of voltage of positive pole simultaneously, described 2≤m≤n, described 1≤x≤m.

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

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

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

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

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

In conjunction with the third aspect to the 5th kind of possible implementation of the third aspect, in the 6th kind of possible implementation, described checkout equipment also comprises:

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

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

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

In conjunction with the third aspect to the 6th kind of possible implementation of 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, for charging to described series capacitance under the control of the GPIO pin of described CPLD.

In conjunction with the third aspect to the 7th kind of possible implementation of the third aspect, in the 8th kind of possible implementation, described checkout equipment also comprises:

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

A kind of series capacitance detection method that the embodiment of the present invention provides and equipment, 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 being in short-circuit condition, open-circuit condition or capacitance ageing state, when there is inefficacy electric capacity in described series capacitance, described inefficacy electric capacity is replaced with idle capacity, relative to prior art, not one by one each electric capacity in series capacitance is 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, inefficacy electric capacity is replaced 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, improve reliability during capacitances in series application.

Accompanying drawing explanation

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

What Fig. 2 provided for the embodiment of the present invention 1 a kind ofly detects in series capacitance the method flow diagram that whether there is the inefficacy electric capacity being in short-circuit condition;

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

What Fig. 4 provided for the embodiment of the present invention 1 a kind ofly detects in series capacitance the method flow diagram that whether there is the inefficacy electric capacity being in open-circuit condition;

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

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

What Fig. 7 provided for the embodiment of the present invention 1 a kind ofly detects in series capacitance the method flow diagram that whether there is the inefficacy electric capacity being in capacitance ageing state;

What Fig. 8 provided for the embodiment of the present invention 1 a kind ofly detects in series capacitance the method flow diagram that whether there is the inefficacy electric capacity being in short-circuit condition in series capacitance charging process;

What Fig. 9 provided for the embodiment of the present invention 1 a kind ofly detects in series capacitance the method flow diagram that whether there is the inefficacy electric capacity being in open-circuit condition in series capacitance charging process;

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, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.

Embodiment 1:

Embodiments provide a kind of series capacitance detection method, as shown in Figure 1, comprising:

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

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

Preferably, in described series capacitance charging process or after described series capacitance charging complete, electric capacity that can be equal according to the magnitude of voltage that whether there is positive and negative electrode in series capacitance, judges that the electric capacity that the magnitude of voltage of described positive and negative electrode is equal is the inefficacy electric capacity being in short-circuit condition.It should be noted that, in described series capacitance charging process, because series capacitance is charged, so the magnitude of voltage of electric capacity of each series connection in series capacitance is less than stable state threshold value, after described series capacitance charging complete, because the charging process of series capacitance completes, so the magnitude of voltage of electric capacity of each series connection in series capacitance is less than or equal to stable state threshold value, the magnitude of voltage under two states is unequal.Stable state threshold value refers to the maximum voltage value that series capacitance reaches in charging process.Therefore, electric capacity that can be equal according to the magnitude of voltage that whether there is positive and negative electrode in series capacitance in described series capacitance charging process or after described series capacitance charging complete, namely the voltage existed between positive and negative electrode is the electric capacity of 0, judges that the electric capacity that the magnitude of voltage of described positive and negative electrode is equal is the inefficacy electric capacity being in short-circuit condition.Concrete, in described series capacitance charging process or after described series capacitance charging complete, if there is the electric capacity that the magnitude of voltage of positive and negative electrode is equal in described series capacitance, judge that the electric capacity that the magnitude of voltage of described positive and negative electrode is equal is the inefficacy electric capacity being in short-circuit condition.

Preferably, after described series capacitance charging complete, the electric capacity that magnitude of voltage has fluctuation if exist in described series capacitance, judge that the magnitude of voltage of described positive pole has fluctuation, the electric capacity that the magnitude of voltage of negative pole is constant is the inefficacy electric capacity being in open-circuit condition, the basis that magnitude of voltage has fluctuation to refer to normal voltage value after charging there is the magnitude of voltage change exceeding normal voltage variation range, namely the difference of magnitude of voltage and original magnitude of voltage exceeds normal variation scope, such as, the magnitude of voltage of certain capacitance cathode is after charging complete, 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 exceedes 5% of original magnitude of voltage, then can think that the magnitude of voltage of this electric capacity has the magnitude of voltage change exceeding normal voltage variation range, namely there is fluctuation.

Preferably, in described series capacitance charging process, if exist in described series capacitance, cathode voltage value equals stable state threshold value, negative battery voltage is the electric capacity of 0, judges that the electric capacity that described cathode voltage value equals stable state threshold value, negative battery voltage is 0 is the inefficacy electric capacity being in open-circuit condition.

Preferably, after described series capacitance charging complete, 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; The capacitance of the electric capacity that described k is connected is obtained according to the discharge time of electric capacity of described k series connection, the final voltage of the starting potential of electric discharge and electric discharge; A testing capacitance in the electric capacity of k described in bypass series connection obtains the electric capacity of k-1 series connection; Control the capacitor discharge of described k-1 series connection; The capacitance of the electric capacity that described k-1 is connected is obtained according to the discharge time of electric capacity of described k-1 series connection, the final voltage of the starting potential of electric discharge and electric discharge; The measurement capacitance of described testing capacitance is obtained according to the capacitance of the electric capacity of described k series connection and the capacitance of described k-1 electric capacity of connecting; The available capacity value threshold value of the measurement capacitance of described testing capacitance and described testing capacitance compared, described available capacity value threshold value refers to that electric capacity is in the minimum capacitance value of upstate; If the measurement capacitance of described testing capacitance is less than the available capacity value threshold value of described electric capacity, judge that described testing capacitance is in capacitance ageing state.

When 103, there is inefficacy electric capacity in described series capacitance, series capacitance checkout equipment idle capacity replaces described inefficacy electric capacity.

So, detect each electric capacity in series capacitance simultaneously, judge whether there is inefficacy electric capacity in described series capacitance, described inefficacy electric capacity is the electric capacity being in short-circuit condition, open-circuit condition or capacitance ageing state, when there is inefficacy electric capacity in described series capacitance, described inefficacy electric capacity is replaced with idle capacity, relative to prior art, not one by one each electric capacity in series capacitance is 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, inefficacy electric capacity is replaced 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, improve reliability during capacitances in series application.

It should be noted that, power supply and series capacitance can with consumer conducting, electric energy is provided to consumer, generally power supply and consumer conducting, electric energy is provided to consumer, now the magnitude of voltage of power supply is greater than the magnitude of voltage of series capacitance, when described power supply breaks down, when magnitude of voltage as power supply is less than the magnitude of voltage of series capacitance, series capacitance and described consumer conducting, there is provided electric energy to described consumer, series capacitance is now charging complete state, namely completes charging process.Therefore with regard to needing, the electric capacity of each series connection in described series capacitance is detected, judged in this series capacitance, whether to there is the inefficacy electric capacity being in short-circuit condition, open-circuit condition and capacitance ageing state by testing result, ensure that series capacitance normally can provide electric energy to described consumer.

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

Suppose in embodiment of the present invention Fig. 2 with the series capacitance checkout equipment shown in Fig. 3 to detect in series capacitance whether there is inefficacy electric capacity.In figure 3, series capacitance checkout equipment comprises: a CPLD (Complex Programmable Logic Device, CPLD), 6 ADC (Analog to Digital Converter of described CPLD, analog-digital converter) pin is ADC5, ADC4, ADC3, ADC2, ADC1 and ADC0, described ADC5, ADC4, ADC3, ADC2, ADC1 and ADC0 respectively with the electric capacity C5 of 5 in series capacitance, C4, C3, C2 and C1 just, negative pole connects, such as, the 3rd ADC pin ADC3 in 6 ADC pins of described CPLD and the 4th ADC pin ADC4 are connected with the negative pole of the electric capacity C4 of the 4th in this series capacitance and positive pole respectively, for detecting the magnitude of voltage of negative pole of the 4th electric capacity C4 and the magnitude of voltage of positive pole simultaneously.

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 exports) pin GPIO5, GPIO4, GPIO3, GPIO2 with GPIO1 is connected, described Q5, Q4, Q3, the source S of Q2 and Q1 respectively with the electric capacity C5 of 5 in series capacitance, C4, C3, the positive pole of C2 with C1 is connected, described Q5, Q4, Q3, the drain D of Q2 and Q1 respectively with the electric capacity C5 of 5 in series capacitance, C4, C3, the negative pole of C2 with C1 is connected, during for there is inefficacy electric capacity in described series capacitance, described CPLD by 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, during for there is inefficacy electric capacity in series capacitance, replaces described inefficacy electric capacity.

A NMOS (Negative channel Metal Oxide Semiconductor, 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, during for there is inefficacy electric capacity in described series capacitance, described CPLD controls described NMOS Q0 by GPIO0 pin to be ended, and makes described idle capacity replace described inefficacy electric capacity.

A DC-DC (direct current to direct current, direct current is to direct supply), one end of this DC-DC is connected with the 7th of described CPLD the GPIO pin GPIO6, the other end is connected with 5 series capacitances, in figure 3, the other end of this DC-DC is connected with the positive pole of electric capacity C5, for charging to this series capacitance under the control of the pin GPIO6 of described CPLD.

A BJT (Bipolar Junction Transistor, bipolar junction transistor), the base stage B of this BJT is connected with the 8th of described CPLD the GPIO pin GPIO7, the emitter E ground connection of described BJT, the collector C of described BJT is connected with series capacitance, in figure 3, the collector C of this BJT is connected with the positive pole of electric capacity C5, for controlling the electric discharge of described series capacitance.

It should be noted that, the idle capacity in Fig. 3 also can exist multiple, and the number of existence can be equal with the number of the 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 exemplarily, 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 also only exemplarily, can select suitable quantity according to actual needs during embody rule.

After series capacitance charging complete, detect in series capacitance the inefficacy electric capacity whether existing and be in short-circuit condition in embodiment of the present invention Fig. 2 with the series capacitance checkout equipment shown in Fig. 3, concrete steps are as follows:

201, CPLD is opened by GPIO6 pin control DC-DC, series capacitance is charged, until charging complete.

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

Concrete, as shown in Figure 3, after series capacitance charging complete, 6 ADC pins ADC5, ADC4, ADC3, ADC2, ADC1 and ADC0 of CPLD detect the magnitude of voltage of the positive and negative electrode of 5 in series capacitance electric capacity C5, C4, C3, C2 and C1 respectively, wherein, what pin ADC5 detected is the magnitude of voltage of the positive pole of electric capacity C5, and this magnitude of voltage is designated as V5; What pin ADC4 detected is the magnitude of voltage of the negative pole of electric capacity C5 and the positive pole of electric capacity C4, and this magnitude of voltage is designated as V4; What pin ADC3 detected is the magnitude of voltage of the negative pole of electric capacity C4 and the positive pole of electric capacity C3, and this magnitude of voltage is designated as V3; What pin ADC2 detected is the magnitude of voltage of the negative pole of electric capacity C3 and the positive pole of electric capacity C2, and this magnitude of voltage is designated as V2; What pin ADC1 detected is the magnitude of voltage of the negative pole of electric capacity C2 and the positive pole of electric capacity C1, and this magnitude of voltage is designated as V1; What pin ADC0 detected is the magnitude of voltage of the negative pole of electric capacity C1, and this magnitude of voltage is designated as V0.

If there is the electric capacity that the magnitude of voltage of positive and negative electrode is equal in 203 described series capacitances, judge that the electric capacity that the magnitude of voltage of described positive and negative electrode is equal is the inefficacy electric capacity being in short-circuit condition.

Example, as electric capacity C5, C4, C3, when C2 and C1 normally works, suppose that the voltage V5 of the positive pole of C5 is 12V, because electric capacity has equalizer circuit and all presses to electric capacity in series connection application, so when normally working, the voltage that ADC5 to ADC0 detects, namely 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, the voltage that ADC5 to ADC0 detects is respectively 12V, 9V, 9V, 6V, 3V and 0V, the magnitude of voltage V3 that magnitude of voltage V4 and ADC3 that ADC4 detects detects is equal, namely just exist in this series capacitance, the electric capacity C4 that the magnitude of voltage of negative pole is equal, judge just described, the electric capacity C4 that the magnitude of voltage of negative pole is equal is the inefficacy electric capacity being in short-circuit condition.

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

Example, suppose that described inefficacy electric capacity is C5, the process of replacing described inefficacy electric capacity C5 with idle capacity C0 is specially: CPLD controls the source S of described PMOS Q5 and the positive pole conducting of inefficacy electric capacity C5 by GPIO5 pin, control the drain D of described PMOS Q5 and the negative pole conducting of inefficacy electric capacity C5, electric current in series capacitance is successively by the source S of PMOS Q5, grid G and drain D flow into series capacitance from the positive pole of electric capacity C4, make inefficacy electric capacity C5 bypass, CPLD is ended by the source S of GPIO0 pin control NMOS Q0 and the positive pole of idle capacity C0, the negative pole of the drain D and idle capacity C0 that control described NMOS Q0 ends, electric current in series capacitance directly flows into from the positive pole of idle capacity C0, idle capacity C0 is made to access series capacitance, inefficacy electric capacity C5 is replaced with idle capacity C0.

So, the series capacitance checkout equipment shown in Fig. 3 is adopted to detect in series capacitance the inefficacy electric capacity whether existing and be in short-circuit condition, when existence in series capacitance is in the inefficacy electric capacity of short-circuit condition, the inefficacy electric capacity of short-circuit condition is in described in replacing with idle capacity, the inefficacy electric capacity that is in short-circuit condition can be detected timely and replace the inefficacy electric capacity being in short-circuit condition with idle capacity, make the fast quick-recovery normal operating conditions of series capacitance, this improves reliability during capacitances in series application.

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

After series capacitance charging complete, still suppose in embodiment of the present invention Fig. 4 with the series capacitance checkout equipment shown in Fig. 3 to detect in series capacitance the inefficacy electric capacity whether existing and be in open-circuit condition.

401, CPLD is opened by GPIO6 pin control DC-DC, series capacitance is charged, until charging complete.

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

Concrete, shown in Fig. 3, after series capacitance charging complete, respectively the magnitude of voltage of the positive and negative electrode of 5 in series capacitance electric capacity C5, C4, C3, C2 and C1 is detected with 6 ADC pins ADC5, ADC4, ADC3, ADC2, ADC1 and ADC0 of CPLD, wherein, what pin ADC5 detected is the magnitude of voltage of the positive pole of electric capacity C5, and this magnitude of voltage is designated as V5; What pin ADC4 detected is the magnitude of voltage of the negative pole of electric capacity C5 and the positive pole of electric capacity C4, and this magnitude of voltage is designated as V4; What pin ADC3 detected is the magnitude of voltage of the negative pole of electric capacity C4 and the positive pole of electric capacity C3, and this magnitude of voltage is designated as V3; What pin ADC2 detected is the magnitude of voltage of the negative pole of electric capacity C3 and the positive pole of electric capacity C2, and this magnitude of voltage is designated as V2; What pin ADC1 detected is the magnitude of voltage of the negative pole of electric capacity C2 and the positive pole of electric capacity C1, and this magnitude of voltage is designated as V1; What pin ADC0 detected is the magnitude of voltage of the negative pole of electric capacity C1, and this magnitude of voltage is designated as V0.

If there is the electric capacity that magnitude of voltage has fluctuation in 403 described series capacitances, judge that the magnitude of voltage of described positive pole has fluctuation, the electric capacity that the magnitude of voltage of negative pole is constant is the inefficacy electric capacity being in open-circuit condition, the basis that described magnitude of voltage has fluctuation to refer to normal voltage value after charging has the magnitude of voltage change exceeding normal voltage variation range.

Example, if detect series capacitance with the testing circuit shown in Fig. 3, when 6 ADC pins ADC5, ADC4, ADC3, ADC2, ADC1 and ADC0 of CPLD detect the magnitude of voltage of the positive and negative electrode of 5 in series capacitance electric capacity C5, C4, C3, C2 and C1 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, judge that the magnitude of voltage of described positive pole has fluctuation, the electric capacity that the magnitude of voltage of negative pole is constant is the inefficacy electric capacity being in open-circuit condition.

Example, as shown in Figure 5, for 6 ADC pins ADC5, ADC4, ADC3, ADC2, ADC1 and the ADC0 of CPLD when electric capacity C3 is in open-circuit condition are respectively to the result figure that the magnitude of voltage of the positive and negative electrode of 5 in series capacitance electric capacity C5, C4, C3, C2 and C1 detects, in figure, transverse axis is t detection time, the longitudinal axis is the magnitude of voltage V detected, within t1 to the t2 time period, the magnitude of voltage of electric capacity C4 and C3 has fluctuation, and the magnitude of voltage of electric capacity C2 and C1 is substantially constant.Can judge that the magnitude of voltage of positive pole has fluctuation, the electric capacity C3 that the magnitude of voltage of negative pole is constant is the inefficacy electric capacity being in open-circuit condition.Because the fluctuation of the magnitude of voltage of electric capacity in series capacitance is general less, so according to magnitude of voltage whether have fluctuation judge whether to exist in series capacitance be in open-circuit condition inefficacy electric capacity only as a kind of method of testing in embodiment, the possibility of result of judgement is not accurate enough.

In addition, except 401 ~ 403 methods provided, the embodiment of the present invention additionally provides the another kind of method judging whether to exist in series capacitance the inefficacy electric capacity being in open-circuit condition, the method is: charge to described series capacitance in stopping, and to after described series capacitance electric discharge, if there is the magnitude of voltage of positive pole in preset time period in described series capacitance have the decline that exceeds preset range and the constant electric capacity of the magnitude of voltage of negative pole, judge described in preset time period the magnitude of voltage of positive pole have the decline that exceeds preset range and the constant electric capacity of the magnitude of voltage of negative pole is the inefficacy electric capacity being in open-circuit condition.

Concrete, turned off by GPIO6 pin control DC-DC at CPLD, stop charging to series capacitance, and CPLD is by GPIO7 pin control BJT conducting, after series capacitance is discharged, then in preset time period, observe 6 ADC pin ADC5 of CPLD, ADC4, ADC3, ADC2, ADC1 and ADC0 is respectively to the electric capacity C5 of 5 in series capacitance, C4, C3, C2 and C1 just, the testing result of the magnitude of voltage of negative pole, if 5 electric capacity C5 in series capacitance, C4, C3, the magnitude of voltage of the positive pole of certain electric capacity in C2 and C1 has suddenly the decline that exceeds preset range and the magnitude of voltage of negative pole is constant, then judge that the magnitude of voltage of positive pole in this preset time period has suddenly the decline that exceeds preset range and the constant electric capacity of the magnitude of voltage of negative pole is the inefficacy electric capacity being in open-circuit condition.Example, suppose that preset range is 99% of normal voltage value between normal voltage value, suppose that the normal voltage value of electric capacity C3 is 7V, then the preset range of electric capacity C3 is when changing between 6.93V to 7V, all belong to normal variation scope, and the magnitude of voltage of the positive pole of electric capacity C3 is changed to 5V suddenly and the magnitude of voltage of negative pole is constant in this preset time period, judge that the magnitude of voltage of described positive pole has suddenly the decline that exceeds preset range and the constant electric capacity C3 of the magnitude of voltage of negative pole is the inefficacy electric capacity being in open-circuit condition, as shown in Figure 6, for 6 ADC pin ADC5 of CPLD when electric capacity C3 is in open-circuit condition, ADC4, ADC3, ADC2, ADC1 and ADC0 is respectively to the electric capacity C5 of 5 in series capacitance, C4, C3, C2 and C1 just, the result figure of the magnitude of voltage detection of negative pole, in figure, transverse axis is t detection time, the longitudinal axis is the magnitude of voltage V detected, the magnitude of voltage of t1 moment electric capacity C3 is 7V, stop charging to series capacitance in the t1 time, within t2 to the t3 time period, the magnitude of voltage of electric capacity C4 and C3 all there occurs change, wherein, the magnitude of voltage of electric capacity C3 is changed to 5V, the magnitude of voltage of electric capacity C2 and C1 is substantially constant.

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

So, the series capacitance checkout equipment shown in Fig. 3 is adopted to detect in series capacitance the inefficacy electric capacity whether existing and be in open-circuit condition, when existence in series capacitance is in the inefficacy electric capacity of open-circuit condition, the inefficacy electric capacity of open-circuit condition is in described in replacing with idle capacity, the inefficacy electric capacity that is in open-circuit condition can be detected timely and replace the inefficacy electric capacity being in open-circuit condition with idle capacity, make the fast quick-recovery normal operating conditions of series capacitance, this improves reliability during capacitances in series application.

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

After series capacitance charging complete, still suppose in embodiment of the present invention Fig. 7 with the series capacitance checkout equipment shown in Fig. 3 to detect in series capacitance the inefficacy electric capacity whether existing and be in capacitance ageing state.

701, CPLD is opened by GPIO6 pin control DC-DC, series capacitance is charged, until charging complete.

702, CPLD is by GPIO7 pin control BJT conducting, makes 5 capacitor discharges of connecting in described series capacitance.

Concrete, after series capacitance charging complete, CPLD, by GPIO7 pin control BJT conducting, makes 5 electric capacity C5, C4, C3, C2 and C1 electric discharges in series capacitance, and records the final voltage Vb of T1 discharge time of this series capacitance, the starting potential Va of electric discharge and electric discharge.

It should be noted that, in series capacitance discharge process, still to ensure that series capacitance can provide electric energy to consumer, so the final voltage Vb of the electric discharge of this series capacitance can not lower than the first voltage threshold preset, described first voltage threshold is for ensureing that series capacitance can provide the minimum voltage value of electric energy to consumer.

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

Concrete, calculate the capacitance C15 of the entirety 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 electric discharge of this series capacitance; Vb is the final voltage of the electric discharge of this series capacitance.

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

Example, suppose that electric capacity C5 is testing capacitance, by the electric capacity C5 bypass in series capacitance, obtain 4 series capacitances.Concrete, CPLD controls the source S of described PMOSQ5 and the positive pole conducting of inefficacy electric capacity C5 by GPIO5 pin, control the drain D of described PMOS Q5 and the negative pole conducting of inefficacy electric capacity C5, electric current in series capacitance is successively by the source S of PMOS Q5, grid G and drain D flow into series capacitance from the positive pole of electric capacity C4, make inefficacy electric capacity C5 bypass, obtain 4 series capacitances be made up of electric capacity C4, C3, C2 and C1.

It should be noted that, in order to ensure that series electrical has enough electricity and carries out discharge test, the GPIO6 pin needing CPLD to control described CPLD in discharge process opens DC-DC, charge to series capacitance, make the voltage resume of series capacitance to the second voltage threshold preset, described second voltage threshold is ensure that series electrical has the minimum voltage value that enough electricity carry out discharge test.

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

Concrete, CPLD, by GPIO7 pin control BJT conducting, makes 4 electric capacity C4, C3, C2 and C1 electric discharges in series capacitance, and records the final voltage Vd of T2 discharge time of this series capacitance, the starting potential Vc of electric discharge and electric discharge.

It should be noted that, in these 4 series capacitance discharge processes, still to ensure that series capacitance can provide electric energy to consumer, so the final voltage Vd of the electric discharge of this series capacitance can not lower than the first voltage threshold preset, described first voltage threshold is for ensureing that series capacitance can provide the minimum voltage value of electric energy to consumer.

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

Concrete, calculate the capacitance C14 of the entirety 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 electric discharge of this series capacitance; Vd is the final voltage of the electric discharge of this series capacitance.

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

Concrete, according to formula calculate the capacitance of testing capacitance C5, wherein C15 is the capacitance of the entirety of 5 series capacitances in series capacitance; C14 is the capacitance of the entirety of 4 series capacitances in series capacitance.

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

Suppose that electric capacity C5 is testing capacitance, and the available capacity threshold value of C5 is 500 kilo-ohms, by the capacitance C of testing capacitance C5 ₅compare with the available capacity threshold value of electric capacity C5.

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

If the capacitance C of testing capacitance C5 ₅be less than the available capacity value threshold value 500 kilo-ohms of electric capacity C5, with regard to judging, the capacitance of testing capacitance is less than the electric capacity C5 of the available capacity value threshold value of electric capacity is the inefficacy electric capacity being in capacitance ageing state.

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

So, the series capacitance checkout equipment shown in Fig. 3 is adopted to detect in series capacitance the inefficacy electric capacity whether existing and be in capacitance ageing state, when existence in series capacitance is in the inefficacy electric capacity of capacitance ageing state, the inefficacy electric capacity of capacitance ageing state is in described in replacing with idle capacity, the inefficacy electric capacity that is in capacitance ageing state can be detected timely and replace the inefficacy electric capacity being in capacitance ageing state with idle capacity, make the fast quick-recovery normal operating conditions of series capacitance, this improves reliability during capacitances in series application.

It should be noted that, the series capacitance detection method that the embodiment of the present invention provides can also detect series capacitance in series capacitance charging process, judges whether there is the inefficacy electric capacity being in short-circuit condition in this series capacitance.

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

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

801, CPLD is opened by GPIO6 pin control DC-DC, and series capacitance is charged.

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

Concrete, shown in Fig. 3, in series capacitance charging process, respectively the magnitude of voltage of the positive and negative electrode of 5 in series capacitance electric capacity C5, C4, C3, C2 and C1 is detected with 6 ADC pins ADC5, ADC4, ADC3, ADC2, ADC1 and ADC0 of CPLD, wherein, what pin ADC5 detected is the magnitude of voltage of the positive pole of electric capacity C5, and this magnitude of voltage is designated as V5; What pin ADC4 detected is the magnitude of voltage of the negative pole of electric capacity C5 and the positive pole of electric capacity C4, and this magnitude of voltage is designated as V4; What pin ADC3 detected is the magnitude of voltage of the negative pole of electric capacity C4 and the positive pole of electric capacity C3, and this magnitude of voltage is designated as V3; What pin ADC2 detected is the magnitude of voltage of the negative pole of electric capacity C3 and the positive pole of electric capacity C2, and this magnitude of voltage is designated as V2; What pin ADC1 detected is the magnitude of voltage of the negative pole of electric capacity C2 and the positive pole of electric capacity C1, and this magnitude of voltage is designated as V1; What pin ADC0 detected is the magnitude of voltage of the negative pole of electric capacity C1, and this magnitude of voltage is designated as V0.

If it is equal and be less than the electric capacity of stable state threshold value to there is positive and negative electrode magnitude of voltage in 803 described series capacitances, judge that the magnitude of voltage of described positive and negative electrode is equal and the electric capacity being less than stable state threshold value is the inefficacy electric capacity being in short-circuit condition.

Example, as electric capacity C5, C4, C3, when C2 and C1 normally works, suppose that the voltage V5 of 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 application, so the t0 moment in normal charging process, the voltage that ADC5 to ADC0 detects, namely V5 to V0 should be respectively 8V, 6.4V, 4.8V, 3.2V, 1.6V and 0V, suppose that the stable state threshold value of V4 and V3 is 9V, if this series capacitance in the course of the work, the voltage that ADC5 to ADC0 detects is respectively 8V, 6V, 6V, 4V, 2V and 0V, the magnitude of voltage V3 that magnitude of voltage V4 and ADC3 that ADC4 detects detects is equal is all 6V, and be less than stable state threshold value 9V, then just exist in this series capacitance, the magnitude of voltage of negative pole is equal and be less than the electric capacity C4 of stable state threshold value, judge just described, the magnitude of voltage of negative pole is equal and the electric capacity C4 being less than stable state threshold value is the inefficacy electric capacity being in short-circuit condition.

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

So, in series capacitance charging process, series capacitance is detected, when in described series capacitance, existence is in the inefficacy electric capacity of short-circuit condition, the inefficacy electric capacity of short-circuit condition is in described in replacing with idle capacity, the inefficacy electric capacity that is in short-circuit condition can be detected timely and replace the inefficacy electric capacity being in short-circuit condition with idle capacity, make the fast quick-recovery normal operating conditions of series capacitance, this improves reliability during capacitances in series application.

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

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

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

901, CPLD is opened by GPIO6 pin control DC-DC, and series capacitance is charged.

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

If exist in 903 described series capacitances, cathode voltage value equals stable state threshold value, negative battery voltage is the electric capacity of 0, judges that the electric capacity that described cathode voltage value equals stable state threshold value, negative battery voltage is 0 is the inefficacy electric capacity being in open-circuit condition.

Example, if detect series capacitance with the testing circuit shown in Fig. 3, as 6 ADC pin ADC5 of CPLD, ADC4, ADC3, ADC2, ADC1 and ADC0 is respectively to the electric capacity C5 of 5 in series capacitance, C4, C3, C2 and C1 just, when the magnitude of voltage of negative pole detects, if ADC5, ADC4, ADC3, ADC2, the cathode voltage value of certain electric capacity that ADC1 and ADC0 detects in 5 electric capacity in this series capacitance equals stable state threshold value, the magnitude of voltage of negative pole is 0, judge that described cathode voltage value equals stable state threshold value, the magnitude of voltage of negative pole be 0 electric capacity be the inefficacy electric capacity being in open-circuit condition.

It should be noted that, when just having started to charge to series capacitance, 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 being in open-circuit condition in charging process in series capacitance, then occurring that the positive pole that the moment of the inefficacy electric capacity being in open-circuit condition is in the inefficacy electric capacity of open-circuit condition and the magnitude of voltage of electric capacity of connecting with side of the positive electrode can rise to stable state threshold value, and the negative pole being in the inefficacy electric capacity of open-circuit condition and the magnitude of voltage of electric capacity of connecting with negative side are 0.

Example, as shown in table 1, suppose that the stable state threshold value of 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, judge that the electric capacity C1 that in series capacitance, cathode voltage value V1 equals stable state threshold value, the magnitude of voltage V0 of negative pole is 0 is the inefficacy electric capacity being in open-circuit condition, namely V5=V4=V3=V2=V1=11.5V is worked as, during V0=0V, electric capacity C1 is the inefficacy electric capacity being in 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, magnitude of voltage V1 and V0 that ADC1 and ADC0 detects is equal, V0=V1=0V, judge that the electric capacity C2 that in series capacitance, cathode voltage value V2 equals stable state threshold value, the magnitude of voltage V1 of negative pole is 0 is the inefficacy electric capacity being in open-circuit condition, namely V5=V4=V3=V2=11.5V is worked as, during V1=V0=0V, electric capacity C2 is the inefficacy electric capacity being in open-circuit condition.

If magnitude of voltage V5, V4 and V3 that ADC5, ADC4 and ADC3 measure equal stable state threshold value 11.5V, magnitude of voltage V2, V1 and V0 that ADC2, ADC1 and ADC0 detect are equal, V0=V1=V2=0V, judge that the electric capacity C3 that in series capacitance, cathode voltage value V3 equals stable state threshold value, the magnitude of voltage V2 of negative pole is 0 is the inefficacy electric capacity being in open-circuit condition, namely V5=V4=V3=11.5V is worked as, during V2=V1=V0=0V, electric capacity C3 is the inefficacy electric capacity being in open-circuit condition.

If magnitude of voltage V5 and V4 that ADC5 and ADC4 measures equals stable state threshold value 11.5V, magnitude of voltage V3, V2, V1 and V0 that ADC3, ADC2, ADC1 and ADC0 detect are equal, V3=V2=V1=V0=0V, judge that the electric capacity C4 that in series capacitance, cathode voltage value V4 equals stable state threshold value, the magnitude of voltage V3 of negative pole is 0 is the inefficacy electric capacity being in open-circuit condition, namely V5=V4=11.5V is worked as, during V3=V2=V1=V0=0V, electric capacity C4 is the inefficacy electric capacity being in 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 V0 that ADC4, ADC3, ADC2, ADC1 and ADC0 detect are equal, V4=V3=V2=V1=V0=0V, judge that the electric capacity C5 that in series capacitance, cathode voltage value V5 equals stable state threshold value, the magnitude of voltage V4 of negative pole is 0 is the inefficacy electric capacity being in open-circuit condition, namely V5=11.5V is worked as, during V4=V3=V2=V1=V0=0V, electric capacity C5 is the inefficacy electric capacity being in open-circuit condition.

Table 1:

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

So, in series capacitance charging process, series capacitance is detected, when in described series capacitance, existence is in the inefficacy electric capacity of open-circuit condition, the inefficacy electric capacity of open-circuit condition is in described in replacing with idle capacity, the inefficacy electric capacity that is in open-circuit condition can be detected timely and replace the inefficacy electric capacity being in open-circuit condition with idle capacity, make the fast quick-recovery normal operating conditions of series capacitance, this improves reliability during capacitances in series application.

Embodiment 2:

Embodiments provide a kind of series capacitance checkout equipment 100, as shown in Figure 10, comprising:

Detecting unit 1001, for detecting each electric capacity in series capacitance simultaneously.

Preferably, described detecting unit 1001 specifically for:

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

Preferably, described judging unit 1002 specifically for:

After described series capacitance charging complete, the electric capacity that magnitude of voltage has fluctuation if exist in described series capacitance, judge that the magnitude of voltage of described positive pole has fluctuation, electric capacity that the magnitude of voltage of negative pole is constant is the inefficacy electric capacity being in open-circuit condition, there is the magnitude of voltage change exceeding normal voltage variation range on the basis that described magnitude of voltage has fluctuation to refer to normal voltage value after charging.

Preferably, described judging unit 1002 specifically for:

In stopping, described series capacitance is charged, and to after described series capacitance electric discharge, if there is the magnitude of voltage of positive pole in preset time period in described series capacitance have the decline that exceeds preset range and the constant electric capacity of the magnitude of voltage of negative pole, judge described in preset time period the magnitude of voltage of positive pole have the decline that exceeds preset range and the constant electric capacity of the magnitude of voltage of negative pole is the inefficacy electric capacity being in open-circuit condition.

Preferably, described judging unit 1002 specifically for:

After described series capacitance charging complete, 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.

The capacitance of the electric capacity that described k is connected is obtained according to the discharge time of electric capacity of described k series connection, the final voltage of the starting potential of electric discharge and electric discharge.

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

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

The capacitance of the electric capacity that described k-1 is connected is obtained according to the discharge time of electric capacity of described k-1 series connection, the final voltage of the starting potential of electric discharge and electric discharge.

The measurement capacitance of described testing capacitance is obtained according to the capacitance of the electric capacity of described k series connection and the capacitance of described k-1 electric capacity of connecting.

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

Control module 1003, during for judging to there is inefficacy electric capacity in described series capacitance at described judging unit 1002, replaces described inefficacy electric capacity with idle capacity.

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, for charging to described series capacitance.

So, detecting unit detects each electric capacity in series capacitance simultaneously, and judging unit judges whether there is inefficacy electric capacity in described series capacitance, and described inefficacy electric capacity is the electric capacity being in short-circuit condition, open-circuit condition or capacitance ageing state, when there is inefficacy electric capacity in described series capacitance, described inefficacy electric capacity is replaced with idle capacity, relative to prior art, not one by one each electric capacity in series capacitance is 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, inefficacy electric capacity is replaced 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, improve reliability during capacitances in series application.

Embodiment 3:

Embodiments provide 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 n electric capacity and is respectively electric capacity C1, C2 ..., Cn, n >=2;

Described series capacitance checkout equipment comprises:

At least one complex programmable logic device (CPLD) 1101, described CPLD1101 is used for detecting each electric capacity in series capacitance simultaneously, judge whether there is inefficacy electric capacity in described series capacitance, described inefficacy electric capacity is the electric capacity being in short-circuit condition, open-circuit condition or capacitance ageing state, when there is inefficacy electric capacity in described series capacitance, control idle capacity replaces described inefficacy electric capacity.

Described CPLD1101 specifically for:

Described CPLD11O1 specifically for:

After described series capacitance charging complete, 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; The capacitance of the electric capacity that described k is connected is obtained according to the discharge time of electric capacity of described k series connection, the final voltage of the starting potential of electric discharge and electric discharge; A testing capacitance in the electric capacity of k described in bypass series connection obtains the electric capacity of k-1 series connection; Control the capacitor discharge of described k-1 series connection; The capacitance of the electric capacity that described k-1 is connected is obtained according to the discharge time of electric capacity of described k-1 series connection, the final voltage of the starting potential of electric discharge and electric discharge; The measurement capacitance of described testing capacitance is obtained according to the capacitance of the electric capacity of described k series connection and the capacitance of described k-1 electric capacity of connecting; The available capacity value threshold value of the measurement capacitance of described testing capacitance and described testing capacitance compared, described available capacity value threshold value refers to that electric capacity is in the minimum capacitance value of upstate; If the measurement capacitance of described testing capacitance is less than the available capacity value threshold value of described electric capacity, judge that described testing capacitance is in capacitance ageing state.

Described CPLD1101 comprises m analog-digital converter ADC pin, described m ADC pin is ADC0, ADC1, ADC2, ADCm-1 respectively with the n in described series capacitance electric capacity C1, C2, Cn just, negative pole connects, wherein, the 2nd ADC pin ADC1 in m the ADC pin of described CPLD1101 and the 3rd ADC pin ADC2 are connected with the negative pole of the electric capacity C2 of the 2nd in described series capacitance and positive pole respectively, for detecting the magnitude of voltage of negative pole of the electric capacity C2 of the 2nd in described series capacitance and the magnitude of voltage of positive pole simultaneously, 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 the n in series capacitance electric capacity C1, C2, the positive pole of Cn connects, the drain D of each PMOS respectively with the n in series capacitance electric capacity C1, C2, the negative pole of Cn connects, during for there is inefficacy electric capacity in described series capacitance, by described CPLD1101 by GPIO pin GPIO1, 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, for when described series capacitance exists inefficacy electric capacity, control described NMOS1103 by described CPLD1101 by GPIO0 pin and end, replace described inefficacy electric capacity with described idle capacity C0.

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

It should be noted that, the NMOS of the series capacitance checkout equipment that the embodiment of the present invention provides is Q0, idle capacity is C0, in practical application scene, described NMOS can exist multiple, described idle capacity also can exist multiple, and the number of described NMOS can be equal with the number of described PMOS, and the number of described idle capacity can be equal with the number of the 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, for charging to described series capacitance under the control of the GPIOn pin of described CPLD1101.

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, for controlling the electric discharge of described series capacitance.

So, series capacitance checkout equipment detects each electric capacity in series capacitance simultaneously, and judges whether there is inefficacy electric capacity in described series capacitance, and described inefficacy electric capacity is the electric capacity being in short-circuit condition, open-circuit condition or capacitance ageing state, when there is inefficacy electric capacity in described series capacitance, described inefficacy electric capacity is replaced with idle capacity, relative to prior art, not one by one each electric capacity in series capacitance is 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, inefficacy electric capacity is replaced 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, improve reliability during capacitances in series application.

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

In several embodiments that the application provides, should be understood that, disclosed system, equipment and method, can realize by another way.Such as, apparatus embodiments described above is only schematic, such as, the division of described unit, be only a kind of logic function to divide, actual can have other dividing mode when realizing, such as multiple unit or assembly can in conjunction with or another system can be integrated into, or some features can be ignored, or do not perform.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, and the indirect coupling of equipment or unit or communication connection can be electrical, machinery or other form.

The described unit illustrated as separating component or can may not be and physically separates, and the parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed in multiple network element.Some or all of unit wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.

In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, also can be that the independent physics of unit comprises, also can two or more unit in a unit integrated.Above-mentioned integrated unit both can adopt the form of hardware to realize, and the form that hardware also can be adopted 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 thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should described be as the criterion with the protection domain of claim.

Claims

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

Each electric capacity in series capacitance is detected simultaneously;

When there is inefficacy electric capacity in described series capacitance, control idle capacity replaces described inefficacy electric capacity;

Wherein, describedly detection carried out to each electric capacity in series capacitance simultaneously comprise:

The magnitude of voltage of the positive and negative electrode of each electric capacity in described series capacitance is detected simultaneously;

Describedly judge that whether there is inefficacy electric capacity in described series capacitance comprises:

After described series capacitance charging complete, the electric capacity that magnitude of voltage has fluctuation if exist in described series capacitance, judge that the magnitude of voltage of positive pole has fluctuation, electric capacity that the magnitude of voltage of negative pole is constant is the inefficacy electric capacity being in open-circuit condition, there is the magnitude of voltage change exceeding normal voltage variation range on the basis that described magnitude of voltage has fluctuation to refer to normal voltage value after charging;

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

Each electric capacity in series capacitance is detected simultaneously;

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

Each electric capacity in series capacitance is detected simultaneously;

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

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

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

Control module, during for judging to there is inefficacy electric capacity in described series capacitance at described judging unit, control idle capacity replaces described inefficacy electric capacity;

Wherein, described detecting unit specifically for:

Described judging unit specifically for:

Or, in stopping, described series capacitance is charged, and to after described series capacitance electric discharge, if there is the magnitude of voltage of positive pole in preset time period in described series capacitance have the decline that exceeds preset range and the constant electric capacity of the magnitude of voltage of negative pole, judge described in preset time period the magnitude of voltage of positive pole have the decline that exceeds preset range and the constant electric capacity of the magnitude of voltage of negative pole is the inefficacy electric capacity being in open-circuit condition.

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

Wherein, described detecting unit specifically for:

Described judging unit specifically for:

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

Wherein, described detecting unit specifically for:

Described judging unit specifically for:

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

7., according to the arbitrary described series capacitance checkout equipment of claim 5 to 8, it is characterized in that, described series capacitance checkout equipment also comprises:

8. 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:

At least one complex programmable logic device (CPLD), described CPLD is used for detecting each electric capacity in series capacitance simultaneously, judge whether there is inefficacy electric capacity in described series capacitance, described inefficacy electric capacity is the electric capacity being in short-circuit condition, open-circuit condition or capacitance ageing state, when there is inefficacy electric capacity in described series capacitance, control idle capacity replaces described inefficacy electric capacity;

Wherein, described CPLD comprises m analog-digital converter ADC pin, described m ADC pin is connected with the positive and negative electrode of the electric capacity of the n in described series capacitance respectively, wherein, an xth ADC pin in m the ADC pin of described CPLD and a (x+1)th ADC pin are connected with the negative pole of the electric capacity of the xth in described series capacitance and positive pole respectively, for detecting the magnitude of voltage of negative pole of the electric capacity of the xth in described series capacitance and the magnitude of voltage of positive pole simultaneously, described 2≤m≤n, described 1≤x≤m;

Described CPLD specifically for:

If there is the electric capacity that the magnitude of voltage of positive and negative electrode is equal in described series capacitance, judge that the electric capacity that the magnitude of voltage of described positive and negative electrode is equal is the inefficacy electric capacity being in short-circuit condition;

Described series capacitance checkout equipment also comprises:

N NMOS N-channel MOS N NMOS, GPIO pin, the idle capacity of described NMOS and described CPLD are connected, during for there is inefficacy electric capacity in described series capacitance, controlling cut-off by described CPLD by GPIO pin, replacing described inefficacy electric capacity with described idle capacity;

9. 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:

Described CPLD specifically for:

10. 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:

Described CPLD specifically for:

11. 1 kinds of series capacitance checkout equipments, 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:

Described CPLD specifically for:

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

12., according to the arbitrary described series capacitance checkout equipment of claim 9 to 11, is characterized in that, also comprise:

Series capacitance checkout equipment described in 13. according to Claim 8 to 11 are arbitrary, is characterized in that, also comprise:

Series capacitance checkout equipment described in 14. according to Claim 8 to 11 are arbitrary, is characterized in that, also comprise: