CN106921182A - A kind of device and method for improving flow cell pile voltage uniformity - Google Patents
A kind of device and method for improving flow cell pile voltage uniformity Download PDFInfo
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- CN106921182A CN106921182A CN201510993556.XA CN201510993556A CN106921182A CN 106921182 A CN106921182 A CN 106921182A CN 201510993556 A CN201510993556 A CN 201510993556A CN 106921182 A CN106921182 A CN 106921182A
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- pile
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- regulating member
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00302—Overcharge protection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00306—Overdischarge protection
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Abstract
The invention discloses a kind of device and method for improving flow cell pile voltage uniformity, described device includes being parallel to each pile of flow battery respectively, to the resistance regulating member of the total resistance value of each self-corresponding parallel circuit of real-time regulation；It is used to detect the voltage check part of each pile voltage of flow battery；It is used to be based on detecting each pile voltage of flow battery, judge to search the abnormal pile monitoring modular of current voltage and be used to the resistance management module for controlling resistance regulating member corresponding with the pile of electric voltage exception to carry out resistance regulation, to cause that the voltage deviation between any two flow cell pile is respectively less than threshold value.The present invention effectively increases the uniformity of flow cell pile voltage, reduces the probability for overcharging or putting excessively that pile is caused because voltage is inconsistent, and then improve the service life of pile and the utilization rate of flow battery.
Description
Technical field
The present invention relates to cell art and new energy field, particularly relate to one kind and carry high liquid flow electricity
The device and method of pond pile voltage uniformity.
Background technology
Growing demand of the modern economy social development to traditional energy so that the problem that its supply is not enough is increasingly dashed forward
Go out.People have to find the regenerative resources such as wind energy, solar energy, new as representative with wind energy and solar energy in recent years
The energy has already taken up the one seat of energy resource supply, with increase in demand, its ratio still constantly increasing, but its
Easily by weather influenceed and the intermittent imbalance between supply and demand that causes to generate electricity than more prominent, the development of scale energy storage is imperative.
As the approach of extensive energy storage -- the generation of flow battery and develop into the defect of above-mentioned new energy and provide
Supplement well.Flow battery has that security is good, long lifespan, capacitance of storage is big, power separated with capacity it is adjustable,
The features such as addressing freedom and clean environment firendly, it is ensured that the new energy such as wind energy, solar energy is steady after storing adjustment
Output, realizes scale electric energy management, power network auxiliary, voltage control, the important function of large-scale uninterrupted power source.
Pile is the place that chemical energy is mutually converted with electric energy, is the core component of flow battery, and current pile is with many
Individual monocell is sequentially connected in a series arrangement, each section single-cell structure all same；One barrier film separates both positive and negative polarity,
Both positive and negative polarity structure is identical；Electrode and bipolar plates are followed successively by per side (both positive and negative polarity is shared).Several piles by string,
Mode in parallel is integrated into flow battery system.
The internal resistance of flow cell pile contact resistance and electrochemical reaction resistance etc. including between section resistance, part.Work as electricity
When pond is in running status, due to the influence of the factors such as varying environment temperature, charge and discharge system and state-of-charge, its
Internal resistance is all the time in dynamic change, it is impossible to realize accurate measurement, therefore, prior art cannot be effectively ensured liquid stream electricity
Voltage uniformity of the pond in real-time status pile.Particularly charged initial stage and electric discharge latter stage in flow battery, in each pile
Resistance difference is amplified at double, and longtime running can cause part pile to overcharge or put excessively, and then shorten the service life of pile.
At present, although in the prior art with regard to how to ensure cell voltage consistency problem, it has been suggested that certain research or
Demonstration, such as Application No. CN2010105486592 (realizing in charging process to battery balanced device and method),
The patent application of Application No. CN 201010572115X (battery balanced device), it is proposed that can be to a certain degree
The upper technical scheme for solving cell voltage uniformity.But, above solution is suitable only for solving solid state battery
Voltage consistency problem, can not be indiscriminately imitated solution flow battery voltage consistency problem, and its main cause is：Gu
The internal resistance of body battery is generally fixed value, when voltage uniformity is considered, directly can be studied with reference to definite value；And
Flow battery has larger difference at aspects such as properities with solid state battery, and such as flow cell pile is interior
It is a dynamic value that cannot be monitored constantly to hinder, its internal resistance be pile multiple states, such as environment temperature, charge and discharge system,
Such as comprehensive function value of flow of electrolyte, concentration of electrolyte, state-of-charge, thus cannot be fixed with reference to certain reference
Value is studied.
The content of the invention
In view of the defect that prior art is present, the invention aims to provide a kind of raising flow cell pile
The device of voltage uniformity, causes each being consistent property of pile voltage of battery system, and then keep away by the device
Exempt from the problem for overcharging or putting excessively that each pile is caused because voltage is inconsistent.
To achieve these goals, technical scheme：
A kind of device for improving flow cell pile voltage uniformity, it is characterised in that：
Resistance regulating member including being parallel to each pile of flow battery respectively, the resistance regulating member is to real
When adjust the total resistance value of each self-corresponding parallel circuit so that the electricity between any two flow cell pile
Pressure deviation is respectively less than threshold value.
Further, described device also includes being used to detect the voltage detecting of each pile real-time voltage of flow battery
Part.
Further, the resistance regulating member includes：
Each adjustable resistance element；
And the gate-controlled switch connected with each adjustable resistance element；The gate-controlled switch is used to so that the adjustable electric
Resistance element is linked into corresponding parallel circuit when each pile of flow battery is in charge or discharge state
In.
Preferably, the minimum resistance of the adjustable resistance element is at least the N of flow cell pile internal resistance maximum
Times, N≤100.
Further, the pile quantity of flow battery is at least 3.
Further, described device also includes：
Pile monitoring modular, is used to each pile voltage based on voltage check part detection, and analysis is searched current
There is abnormal pile in voltage；
And resistance management module, it is used to control resistance regulating member corresponding with the pile of electric voltage exception to carry out
Resistance is adjusted so that the abnormal voltage of pile of current voltage is respectively less than threshold value with the voltage deviation of other piles.
Preferably, the voltage refers in the presence of the analysis search procedure of abnormal pile：Compare any electricity one by one
Heap voltage and the absolute difference of other pile average voltages, if the absolute difference is more than alarm threshold value, are somebody's turn to do
Pile is the pile of electric voltage exception；The absolute difference refers to any pile voltage and other pile average voltages
The absolute value of value difference value.
Preferably, whether the resistance management module is used to judge the abnormal pile of current voltage more than other electricity
The average value of heap voltage；It is then to control resistance regulating member that resistance regulation is carried out in the way of resistance is successively decreased；
It is no, then control resistance regulating member to carry out resistance regulation in the way of resistance is incremented by.
The present invention also provides a kind of method for improving flow cell pile voltage uniformity, it is characterised in that：
Each pile difference resistance regulating member in parallel of flow battery, by the resistance of real-time regulation resistance regulating member
Value is changing the total resistance value of corresponding parallel circuit so that between any two flow cell pile
Voltage deviation is respectively less than threshold value.
Further, methods described specifically includes following steps：
Methods described comprises the following steps：
Step 1：Flow battery each pile difference parallel connection can be in charge or discharge state in each pile
When be linked into resistance regulating member in corresponding parallel circuit；
Step 2：Detect the voltage of each pile of flow battery；
Step 3：Judge and search voltage and there is abnormal pile, if finding the pile of electric voltage exception, hold
Row step 4, otherwise continues executing with step 1；
Step 4：The resistance of resistance regulating member is adjusted, to cause the electricity between the pile voltage and other piles
Pressure deviation is respectively less than threshold value.
Further, the step 4 comprises the following steps
Step 41：Judge whether the abnormal pile of current voltage is more than the average value of other pile voltages；It is,
Step 42 is then performed, it is no, then perform step 43；
Step 42：The resistance of resistance regulating member is adjusted in the way of resistance is successively decreased；
Step 43：The resistance of resistance regulating member is adjusted in the way of resistance is incremented by.
Voltage is judged and searched in the step 3 there is abnormal pile process including comparing any pile one by one
The absolute difference of voltage and other pile average voltages, if the absolute difference is more than alarm threshold value, the electricity
Heap is the pile of electric voltage exception.
Further, the resistance regulating member includes：
Each adjustable resistance element；
And the gate-controlled switch connected with each adjustable resistance element；The gate-controlled switch is used to so that the adjustable electric
During resistance element is linked into circuit under each pile charge or discharge state of flow battery.
The Standard resistance range of the adjustable resistance element determines with flow cell pile internal resistance maximum；Preferably,
The minimum resistance of the adjustable resistance element is at least N times of flow cell pile internal resistance maximum, N≤100.
Compared with prior art, beneficial effects of the present invention：
1) internal resistance of flow cell pile need not be considered, directly alternate process is carried out from resistance adjustment unit,
With principle it is simple, with low cost, it is easy operation and implement advantage；
2) the resistance power consumption very little of adjustable resistance element in parallel, has reached before resistance power consumption is not increased
Put, voltage is inconsistent between method cleverly solves the problems, such as liquid stream battery stack.
3) pile of electric voltage exception is judged by monitoring the voltage of each pile of flow battery, it is right with it to control
The resistance regulating member answered carries out resistance regulation, is effectively guaranteed flow cell pile voltage uniformity, drop
Low pile overcharges or crosses the probability put, improve pile service life and battery system longtime running it is steady
It is qualitative.
Brief description of the drawings
Fig. 1 is the device application principle figure of the pile voltage uniformity of raising flow battery system of the present invention；
Fig. 2 is the corresponding circuit of device of the pile voltage uniformity of raising flow battery system of the present invention
Schematic diagram；
Fig. 3 is the method and step flow chart of the pile voltage uniformity of raising flow battery system of the present invention.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with accompanying drawing
The present invention is further elaborated.
Design background：There is essential different, main original from the internal resistance of solid state battery in the internal resistance of flow cell pile
Because the internal resistance for being flow cell pile is not to immobilize, its internal resistance can be with the work residing for current pile
Process is different and carry out dynamic change, i.e. the internal resistance of flow cell pile is a dynamic value, and it is by static resistance
With chemical resistance composition, wherein chemical resistance is because by flow battery state-of-charge, temperature, discharge and recharge at that time
The influence such as state has small size change, and cannot draw an exact value, if each pile internal resistance is incomplete
Identical, then each pile voltage is different, so have impact on the uniformity of flow cell pile voltage.
Design principle：The present invention proposes a kind of internal resistance change that need not consider each pile of flow battery, it is only necessary to
Will be by the pile two ends parallel connection resistance regulating member that resistance is adjustable and resistance is much larger than, being hindered by adjusting
The resistance for being worth regulating member realizes changing the voltage at the pile two ends, and each pile two of flow battery is ensured to reach
The purpose of the uniformity of terminal voltage；Specifically, in view of flow battery includes the piles of multiple series connection, and in string
In connection circuit, voltage is directly proportional to resistance, it is known that by the total resistance for adjusting each pile and resistance arranged side by side
Ensure the uniformity of each pile voltage of flow battery；Simultaneously by resistance all-in resistance computing formula arranged side by side
1/R=/1R1+1/R2+…1/Rn, it is known that, all-in resistance is less than any one branch resistance resistance, and branch resistance
Bigger, electric current is smaller；Then when adjustable resistance of the resistance in parallel with pile much larger than its internal resistance, according to simultaneously
Join the voltage in loop, you can reached by way of the resistance of dynamic increase in real time or reduction adjustable resistance above-mentioned
Purpose.
Such as Fig. 1, the present invention can be applied to include positive pole storage tank, negative pole storage tank, pile, positive pole storage tank with electricity
The flow battery of the elements such as the pipeline between heap, the pipeline between negative pole storage tank and pile, battery management system
In, it is by the way that in each pile of flow battery, in parallel resistance regulating member ensures each pile of flow battery respectively
Voltage is consistent；The device connects battery management system BMS simultaneously.BMS collection battery systems scene temperature,
Pressure, flow, pile voltage, are communicated, monitor in real time inversion by fieldbus and energy storage inverter
Device parameter and state.
Specifically, as shown in Fig. 2 a kind of improve flow cell pile (the pile number of its correspondence flow battery
Amount is at least 3) device of voltage uniformity, including：
(1) the resistance regulating member of each pile of flow battery is parallel to respectively, and the resistance regulating member is to real
When adjust the total resistance value of each self-corresponding parallel circuit so that the electricity between any two flow cell pile
Pressure deviation is respectively less than threshold value.
Further, the resistance regulating member includes：
(11) each adjustable resistance element, the Standard resistance range of the adjustable resistance element is with flow cell pile
Resistance maximum determines；Preferably, the minimum resistance of the adjustable resistance element is at least in flow cell pile
N times of resistance maximum, N≤100.
Even R0Resistance be 5 Ω, then at least require the minimum resistance of the adjustable resistance element for 500 Ω,
Ignored with reaching current pile internal resistance situation of change purpose (from above-mentioned resistance all-in resistance formula arranged side by side,
If its minimum resistance is far longer than its internal resistance, the total resistance value of parallel circuit can be realized approximately with adjustable resistance
The change in resistance of element and change), when certain pile voltage and absolute difference with other pile average voltages
During more than alarm threshold value, the Standard resistance range of the adjustable resistance element at the pile two ends is parallel to by regulation
Ensure that each pile voltage is consistent.Simultaneously because the minimum resistance of adjustable resistance element is far longer than and it
Pile internal resistance in parallel so that the current value very little of each parallel branch, therefore its corresponding resistance power consumption is very
It is small, so as to efficiently solve the increased problem of power consumption caused because introducing resistance regulating member.
(12) gate-controlled switch connected with each adjustable resistance element；The gate-controlled switch is by disconnecting or closing
So that the adjustable resistance element be linked under each pile charge or discharge state of flow battery it is corresponding
In parallel circuit.
Described device can ensure to be in charge or discharge in flow battery system pile by battery management system
During state, control gate-controlled switch closure is by each adjustable resistance element in parallel in each pile two of each flow battery
End, each voltage of voltage check part feedback is based in order to pile monitoring modular, and analysis finds out current electricity
Be present abnormal pile in pressure, and controlled by resistance management module corresponding with the pile of the electric voltage exception adjustable
Resistive element carries out resistance regulation so that between the voltage and other piles at current voltage exception pile two ends
Voltage deviation is respectively less than threshold value.
(2) it is used to detect the voltage check part of each pile real-time voltage of flow battery, it preferably uses voltage
Sensor measures the real-time voltage of its corresponding pile.
(3) it is used to each pile voltage of flow battery based on voltage check part detection, and it is current to analyze lookup
There is the pile monitoring modular of abnormal pile in voltage.
Preferably, the voltage refers in the presence of the analysis search procedure of abnormal pile：Compare any electricity one by one
Heap voltage and the absolute difference of other pile average voltages, if the absolute difference is more than alarm threshold value, are somebody's turn to do
Pile is the pile of electric voltage exception.
(4) being used to control resistance regulating member corresponding with the pile of electric voltage exception carries out resistance regulation so that
The resistance management mould that the abnormal voltage of pile of current voltage is consistent with the voltage of other flow cell piles
Block.
Preferably, the resistance management module is used to compare the voltage of current voltage exception pile and other piles
Whether the absolute difference of average value is more than alarm threshold value；It is then to control what resistance regulating member was successively decreased with resistance
Mode carries out resistance regulation, until the voltage between the voltage and other piles at current voltage exception pile two ends
Deviation is respectively less than threshold value；It is no, then control resistance regulating member to carry out resistance regulation in the way of resistance is incremented by,
Until the voltage deviation between the voltage and other piles at current voltage exception pile two ends is respectively less than threshold value.
Preferably, it is basic regulation radix that the resistance regulation process is used with default minimum resistance regulated value
Successively decrease or the current adjustable resistance element of incremental resistance, until the electricity at current voltage exception pile two ends
Voltage deviation between pressure and other piles is respectively less than threshold value.
The present invention also provides a kind of method for improving flow cell pile voltage uniformity simultaneously, and its feature exists
In：
Each pile difference resistance regulating member in parallel of flow battery, by the resistance of real-time regulation resistance regulating member
Value is changing the total resistance value of corresponding parallel circuit so that between any two flow cell pile
Voltage deviation is respectively less than threshold value.
Further, such as Fig. 3, methods described specifically includes following steps：
Step 1：Flow battery each pile difference parallel connection can be in charge or discharge state in each pile
When be linked into resistance regulating member in corresponding parallel circuit；
Step 2：Detect the voltage of each pile of flow battery；
Step 3：Judge and search voltage and there is abnormal pile, if finding the pile of electric voltage exception, hold
Row step 4, otherwise continues executing with step 2；
Step 4：The resistance of resistance regulating member is adjusted, to cause the electricity between the pile voltage and other piles
Pressure deviation is respectively less than threshold value.
Further, the step 4 comprises the following steps
Step 41：Judge whether the abnormal pile of current voltage is more than the average value of other pile voltages；It is,
Step 42 is then performed, it is no, then perform step 43；
Step 42：The resistance of resistance regulating member is adjusted in the way of resistance is successively decreased；
Step 43：The resistance of resistance regulating member is adjusted in the way of resistance is incremented by.
Voltage is judged and searched in the step 3 to be included in the presence of abnormal pile process：Sentence in the step 3
The pile for breaking and searching electric voltage exception includes：Compare any pile voltage and other pile average voltages one by one
Absolute difference, if the absolute difference be more than alarm threshold value, the pile for electric voltage exception pile.
Further, the resistance regulating member includes：
Each adjustable resistance element；
And the gate-controlled switch connected with each adjustable resistance element；The gate-controlled switch is used to so that the adjustable electric
Resistance element is in each pile of flow battery is linked into circuit under charge or discharge state.
The Standard resistance range of the adjustable resistance element determines with flow cell pile internal resistance maximum；Preferably,
The minimum resistance of the adjustable resistance element is at least N times of flow cell pile internal resistance maximum, N≤100.
If R0Resistance be 5 Ω, then at least require that adjustable resistance element minimum resistance is 500 Ω, to reach suddenly
The internal resistance situation of change of slightly current pile is (from above-mentioned resistance all-in resistance formula arranged side by side, if its minimum resistance
Its internal resistance is far longer than, then the total resistance value of parallel circuit can approximately be realized becoming with the resistance of adjustable resistance element
Change and change), when certain pile voltage is more than alarm threshold value with the absolute difference with other pile average voltages
When, by ensureing each pile by the Standard resistance range for adjusting the adjustable resistance element for being parallel to the pile two ends
Voltage is consistent.Simultaneously because the minimum resistance of adjustable resistance element is far longer than in pile connected in parallel
Resistance so that the current value very little of each parallel branch, therefore its corresponding resistance power consumption very little, so that effectively
Solve the increased problem of power consumption caused because introducing resistance regulating member.
Following further technology explanations with instantiation to said apparatus or method simultaneously.
Example 1：If flow battery includes the pile of N number of series connection, if each pile label is respectively CS1、
CS2…CSN, the adjustable resistance element in parallel with each pile be respectively R1、R2…RN；Then each parallel branch
All-in resistance is respectively
1/R=1/R (CSj)+1/Rj(0<j<=n) 1.
It is V to set and be applied to each parallel branch two ends total voltages, each pile voltage is V in theorys/N,
But because each pile internal resistance has differences, then the magnitude of voltage that can cause some piles is higher than Vs/ N, and some
The magnitude of voltage of pile is less than VsThe problem of/N；
When pile monitoring modular detect the magnitude of voltage of some pile (if marked as j) apparently higher than other
The average value of the magnitude of voltage of pile (reaches alert if：Current voltage pile and the voltage of other piles
The absolute difference of average value is more than alarm threshold value) when, in order to ensure between any two flow cell pile
Voltage deviation is respectively less than threshold value, then should reduce pile CSjMagnitude of voltage, that is, reduce the total resistance value of the heap, by
Formula is 1. counter to be pushed away
R=1/ (1/R (CSj)+1/Rj)
As shown from the above formula, R is reducedjValue, you can drop low r-value, CS is reduced so as to reachjTerminal voltage value,
So that the magnitude of voltage of the pile is respectively less than threshold value with the voltage deviation of other pile magnitudes of voltage；
When pile monitoring modular detects the magnitude of voltage of a certain pile (if marked as k) significantly lower than other electricity
(alert if is reached during the average value of the magnitude of voltage of heap：Current voltage pile and the voltage of other piles
The absolute difference of average value is more than alarm threshold value), then should improve pile CSkMagnitude of voltage, that is, improve the heap
1. total resistance value, obtained by formula
R=1/ (1/R (CSk)+1/Rk)
As shown from the above formula, R is improvedkValue, you can put forward high r values, CS is improved so as to reachkTerminal voltage value,
So that the magnitude of voltage of the pile is respectively less than threshold value with the voltage deviation of other pile magnitudes of voltage；
Simultaneously because RjOr RkResistance be far longer than pile internal resistance value arranged side by side, RjOr RkThe current value of branch road
Very little, thus branch road consumption power also very little, i.e., in the absence of causing because introducing resistance regulating element
The increased problem of power consumption.
In sum, instant invention overcomes the internal resistance that traditional method for equalizing voltage needs direct solution battery, and liquid
Galvanic battery internal resistance is affected by many factors and restricts, so as to the defect of exact value cannot be tried to achieve, it passes through parallel connection
Adjustable resistor is predicted to change total resistance of the parallel branch, and the terminal voltage of each pile is adjusted so as to reach,
To ensure the purpose of the uniformity of pile voltage；It can be said that the inventive method is ingenious, realize simply, and simultaneously
The resistance power consumption very little of the adjustable resistance element of connection, has reached on the premise of resistance power consumption is not increased, perfect
Solve the purpose of voltage inconsistence problems between liquid stream battery stack.
The above, the only present invention preferably specific embodiment, but protection scope of the present invention not office
Be limited to this, any one skilled in the art the invention discloses technical scope in, according to this
The technical scheme of invention and its inventive concept are subject to equivalent or change, should all cover in protection of the invention
Within the scope of.
Claims (10)
1. it is a kind of improve flow cell pile voltage uniformity device, it is characterised in that：
Resistance regulating member including being parallel to each pile of flow battery respectively, the resistance regulating member is to real
When adjust the total resistance value of each self-corresponding parallel circuit so that the electricity between any two flow cell pile
Pressure deviation is respectively less than threshold value.
2. the device for improving flow cell pile voltage uniformity according to claim 1, its feature exists
In：
The resistance regulating member includes adjustable resistance element, and the minimum resistance of the adjustable resistance element is at least
It is N times of flow cell pile internal resistance maximum, N≤100.
3. the device for improving flow cell pile voltage uniformity according to claim 2, its feature exists
In：The resistance regulating member also includes the gate-controlled switch connected with each adjustable resistance element.
4. the device for improving flow cell pile voltage uniformity according to claim 1, its feature exists
In：Described device also includes being used to detect the voltage check part of each pile voltage of flow battery.
5. the device for improving flow cell pile voltage uniformity according to claim 4, its feature exists
In：
The pile quantity of the flow battery is at least 3.
6. the device for improving flow cell pile voltage uniformity according to claim 5, its feature exists
In：
Described device also includes：
Pile monitoring modular, is used to each pile voltage based on voltage check part detection, and analysis is searched current
The pile of electric voltage exception；
And resistance management module, it is used to control resistance regulating member corresponding with the pile of electric voltage exception to carry out
Resistance is adjusted so that the voltage deviation between the abnormal pile of current voltage and other piles is respectively less than threshold value.
7. it is a kind of improve flow cell pile voltage uniformity method, it is characterised in that：
Each pile difference resistance regulating member in parallel of flow battery, by the resistance of real-time regulation resistance regulating member
Value is changing the total resistance value of corresponding parallel circuit so that between any two flow cell pile
Voltage deviation is respectively less than threshold value.
8. the method for improving flow cell pile voltage uniformity according to claim 7, its feature exists
In：
Methods described comprises the following steps：
Step 1：Flow battery each pile difference parallel connection can be in charge or discharge state in each pile
When be linked into resistance regulating member in corresponding parallel circuit；
Step 2：Detect the voltage of each pile of flow battery；
Step 3：Judge and search voltage and there is abnormal pile, if finding the pile of electric voltage exception, hold
Row step 4, otherwise continues executing with step 1；
Step 4：The resistance of resistance regulating member is adjusted, to cause the electricity between the pile voltage and other piles
Pressure deviation is respectively less than threshold value.
9. the method for improving flow cell pile voltage uniformity according to claim 8, its feature exists
In：
The step 4 comprises the following steps
Step 41：Judge whether the abnormal pile of current voltage is more than the average value of other pile voltages；It is,
Step 42 is then performed, it is no, then perform step 43；
Step 42：The resistance of resistance regulating member is adjusted in the way of resistance is successively decreased；
Step 43：The resistance of resistance regulating member is adjusted in the way of resistance is incremented by.
10. it is according to claim 8 improve flow cell pile voltage uniformity method, its feature
It is：
The pile that electric voltage exception is judged and searched in the step 3 includes：One by one compare any pile voltage with
The absolute difference of other pile average voltages, if the absolute difference is more than alarm threshold value, the pile is electricity
The normal pile of reduce off-flavor.
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| CN201510993556.XA CN106921182A (en) | 2015-12-25 | 2015-12-25 | A kind of device and method for improving flow cell pile voltage uniformity |
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| CN201510993556.XA CN106921182A (en) | 2015-12-25 | 2015-12-25 | A kind of device and method for improving flow cell pile voltage uniformity |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110544798A (en) * | 2019-09-12 | 2019-12-06 | 浙江齐享科技有限公司 | Battery pack parallel management module, energy storage power station and combined energy storage power station |
| CN112106271A (en) * | 2019-01-03 | 2020-12-18 | 株式会社Lg化学 | Battery balancing device and battery pack comprising same |
| CN113219003A (en) * | 2021-07-08 | 2021-08-06 | 苏州中车氢能动力技术有限公司 | Method and device for measuring water content of electric pile film and measuring terminal |
| CN113875120A (en) * | 2019-06-03 | 2021-12-31 | 罗伯特·博世有限公司 | Method for operating an electrical energy store, electrical energy store and device |
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| CN113219003A (en) * | 2021-07-08 | 2021-08-06 | 苏州中车氢能动力技术有限公司 | Method and device for measuring water content of electric pile film and measuring terminal |
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