CN109509923A - Battery parallel connection management method - Google Patents
Battery parallel connection management method Download PDFInfo
- Publication number
- CN109509923A CN109509923A CN201710825213.1A CN201710825213A CN109509923A CN 109509923 A CN109509923 A CN 109509923A CN 201710825213 A CN201710825213 A CN 201710825213A CN 109509923 A CN109509923 A CN 109509923A
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- Prior art keywords
- battery
- bus
- parallel connection
- voltage
- parallel
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The present invention provides a kind of battery parallel connection management method, in the mode of standing, method includes the following steps: having an at least battery in a bus；One minimum or ceiling voltage battery upper bus first in parallel；And according to a battery parallel connection permissible pressure, it is sequentially in parallel at least battery progress in bus, wherein, battery parallel connection permissible pressure is equal to the maximum allowable charging current * of battery [internal resistance of cell+(internal resistance of cell/in the number of batteries of the bus)], in addition, the present invention also provides a kind of battery parallel connection management method in charge mode and a kind of battery parallel connection management method in discharge mode respectively.
Description
Technical field
The present invention is about a kind of battery management method, espespecially a kind of battery parallel connection management method.
Background technique
For the diversification in response to sci-tech product, the battery for changing into electric energy with stored chemical energy is widely used in each field
In, especially have the development of powerful battery pack very rapid, but battery weight problem, improvement is not readily available, so that greatly
The development of the battery pack of power more difficult meets a small amount of and various market demands because transportation problem is extremely limited.
Although can split into respectively a high power battery group (for example, 5KWh) little module (for example, five 1KWh), according to visitor
The problem of family demand is applied, and is combined into required power, and the transport point that can releive causes, but still lead to the problem of many.
It is worth noting that, the battery with high voltage is according to electrical physical characteristic when battery pack is in parallel connection
The battery with lower voltage can be flowed to, if the pressure difference between battery pack is very big, big electricity can be not only generated between battery pack
Stream, is more likely to that spark can be generated, therefore, how to provide a kind of preferable battery parallel connection management method, above-mentioned produced to solve
The problem of, actually one of current important topic.
Summary of the invention
The shortcomings that in view of the prior art above-mentioned, the main object of the present invention are to provide a kind of battery parallel connection management method.
To reach purpose above-mentioned, the present invention proposes a kind of battery parallel connection management method, when one stands mode, this method
The following steps are included: having an at least battery on a bus (Bus)；This is total on one minimum or ceiling voltage battery elder generation is in parallel
Line；It is sequentially in parallel at least battery progress in the bus and according to a battery parallel connection permissible pressure.
Preferably, being then the standing mould when electric current is less than specific amperage (depending on battery sizes, for example, 0.1A)
Formula, wherein when selecting minimum battery first upper bus in parallel, allow (Yes or No) to be (bus current to the battery parallel connection
Amount/bus parallel connection number) < specific peace multiple and (| electricity of the voltage-of minimum battery to the batteries in parallel connection in the battery of the bus
Pressure) | < maximum allowable pressure difference, wherein the maximum allowable pressure difference=maximum allowable charging current * [internal resistance of cell+(internal resistance of cell/
In the number of batteries of the bus)], wherein the specific amperage is for determining that battery pack is in standing or charge and discharge, numerical value take
Certainly in battery capacity size.When selecting highest battery first upper bus in parallel, it is to battery parallel connection permission (Yes or No)
(bus current amount/bus parallel connection number) < specific peace multiple and (| the voltage-of largest battery is to the parallel connection in the battery of the bus
The voltage of battery) | < maximum allowable pressure difference, wherein the maximum allowable pressure difference=maximum allowable charging current * [internal resistance of cell+
(internal resistance of cell/in the number of batteries of the bus)].
Preferably, the size of the internal resistance of cell depends on the size of battery, uses time, temperature and chemical property.
In an alternative embodiment of the invention, the present invention proposes a kind of battery parallel connection management method, should in a charge mode
Method is the following steps are included: have an at least battery, minimum or ceiling voltage a battery upper bus first in parallel in a bus；When
When the Delta voltage value of one batteries in parallel connection is a positive voltage value, in this of the bus, at least a battery is in the charge mode；With
It is sequentially in parallel at least battery progress in the bus and according to a battery parallel connection permissible pressure, wherein the battery is in parallel
Permissible pressure is equal to the maximum allowable charging current * of the battery [internal resistance of cell+(internal resistance of cell/in the number of batteries of the bus)].
Wherein, when selecting minimum battery first upper bus in parallel, (Yes or No) is allowed to be (total to the battery parallel connection
Line current amount/bus parallel connection number)>specific peace multiple and (0<voltage-of minimum battery is electric to parallel connection in the battery of the bus
Voltage-Delta voltage value < maximum allowable the pressure difference in pond), wherein Delta voltage value=voltage of the battery under charge/discharge,
With unloaded voltage difference.When selecting highest battery first upper bus in parallel, it is to battery parallel connection permission (Yes or No)
(bus current amount/bus parallel connection number)>specific peace multiple and (0<in the battery of the bus largest battery voltage-to this simultaneously
Join voltage-Delta voltage value < maximum allowable pressure difference of battery).
In still another embodiment of the process, the present invention proposes a kind of battery parallel connection management method, should in a discharge mode
Method is the following steps are included: have an at least battery in a bus；One minimum or ceiling voltage battery upper bus first in parallel；When
When the Delta voltage value of one batteries in parallel connection is a negative value, in this of the bus, at least a battery is in the discharge mode；With
It is sequentially in parallel at least battery progress in the bus and according to a battery parallel connection permissible pressure, wherein the battery is in parallel
Permissible pressure is equal to the maximum allowable charging current * of the battery [internal resistance of cell+(internal resistance of cell/in the number of batteries of the bus)].
Wherein, when selecting minimum battery first upper bus in parallel, (Yes or No) is allowed to be (total to the battery parallel connection
Line current amount/bus parallel connection number) <-specific peace multiple and (the minimum battery of-maximum allowable pressure difference < in the battery of the bus
Voltage-Delta voltage value < 0 of the voltage-to the batteries in parallel connection).When selecting highest battery first upper bus in parallel, to the electricity
Pond parallel connection allow (Yes or No) be (bus current amount/bus parallel connection number) <-specific peace multiple and (- maximum allowable pressure difference <
Voltage-Delta voltage value < 0 of the voltage-of largest battery to the batteries in parallel connection in the battery of the bus).
Detailed description of the invention
The embodiment of Fig. 1 according to the present invention shows a kind of battery parallel connection management when one stands mode of the invention
The flow chart of method；
Another embodiment of Fig. 2 according to the present invention shows a kind of battery parallel transistor in a charge mode of the invention
The flow chart of reason method；And
The another embodiment of Fig. 3 according to the present invention shows a kind of battery parallel transistor in a discharge mode of the invention
The flow chart of reason method.
Wherein, the reference numerals are as follows:
S10~S14 step
S20~S26 step
S30~S36 step
Specific embodiment
Illustrate embodiments of the present invention by particular specific embodiment below, those skilled in the art can be by
Content disclosed in the present specification is understood other advantages and efficacy of the present invention easily.The present invention also can be different by other
Specific example is implemented or is applied, and every details in description of the invention can not also departed from based on different viewpoints with applying
Various modifications and change are carried out under spirit of the invention.
It should be clear that structure, ratio, size etc. that this specification institute accompanying drawings are painted, only to cooperate disclosed in specification
Content, for those skilled in the art understand and read, be not intended to limit the invention enforceable qualifications,
Therefore not having technical essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size are not influencing this hair
Under bright the effect of can be generated and the purpose that can reach, disclosed technology contents should all be fallen in and obtain the model that can cover
In enclosing.
Based on the following one embodiment of the invention, a kind of battery parallel connection management method is described, refering to Figure 1, one
When standing mode, this method may include following steps S10~S14:
Step S10: there is an at least battery in a bus；
Step S12: one is minimum or the parallel connection of ceiling voltage battery elder generation is upper bus (Bus)；And
Step S14: sequentially in parallel at least battery progress in bus according to a battery parallel connection permissible pressure.
Since in the battery pack parallel connection of bus, according to electrical physical characteristic, the battery with high voltage can flow to tool
There is the battery of lower voltage, if the pressure difference between battery pack is very big, it will generate high current or generate spark, therefore, at this
In the embodiment of invention, when the battery pack of bus is in standing mode, it can carry out being in quiet according to above-mentioned steps S10~S14
Battery parallel connection management when mode is set, can be effectively prevented from and improve the problem that above-mentioned.
It wherein, is then standing mode when electric current is less than specific amperage.In addition, when selecting in the first parallel connection of minimum battery
When bus, to battery parallel connection allow (Yes or No) be (bus current amount/bus parallel connection number) < specific peace multiple and (| total
Voltage of the voltage-of minimum battery to batteries in parallel connection in the battery of line) | < maximum allowable pressure difference, wherein maximum allowable pressure difference=electricity
Pond permission maximum charging current * [internal resistance of cell+(and the internal resistance of cell/in the number of batteries of the bus)].When selection highest battery is first
In parallel connection when bus, to battery parallel connection allow (Yes or No) be (bus current amount/bus parallel connection number) < specific peace multiple and
(| voltage of the voltage-of largest battery to batteries in parallel connection in the battery of bus) | < maximum allowable pressure difference, wherein maximum allowable pressure
Difference=battery permission maximum charging current * [internal resistance of cell+(and the internal resistance of cell/in the number of batteries of the bus)].
Also, in step S14, the size of the internal resistance of cell depends on the size of battery, uses time, temperature and chemistry
Property.
Furthermore another embodiment according to the present invention, the present invention also provide a kind of battery parallel transistor in charge mode
Reason method, this method may include following steps S20~S26:
Step S20: there is an at least battery in a bus；
Step S22: one is minimum or bus is gone up in the parallel connection of ceiling voltage battery elder generation；
Step S24: at least battery when the Delta voltage value of a batteries in parallel connection is a positive voltage value, in bus
In charge mode；And
Step S26: it is sequentially in parallel at least battery progress in bus according to a battery parallel connection permissible pressure,
In, battery parallel connection permissible pressure is maximum allowable charging current (COCI) * [internal resistance of cell+(internal resistance of cell/in the battery of bus
Quantity)].
Therefore, in another embodiment of the invention, it is a positive voltage value by Delta voltage value, judges in bus
Battery is in charge mode, so battery parallel connection management can be effectively performed according to above-mentioned steps S20~S26, and then avoid and
The problem that when improving the battery pack parallel connection in bus and being in charge mode.
That is, when the Delta voltage value of a batteries in parallel connection is a positive voltage value, at an at least battery for bus
In charge mode, wherein when selecting minimum battery first upper bus in parallel, allow (Yes or No) to be (bus to battery parallel connection
The magnitude of current/bus parallel connection number)>specific peace multiple and (0<in the battery of bus minimum battery electricity of the voltage-to batteries in parallel connection
Pressure-Delta voltage value < maximum allowable pressure difference), wherein Delta voltage value=voltage of the battery under charge/discharge, with zero load
Voltage difference.When selecting highest battery first upper bus in parallel, (Yes or No) is allowed to be (bus current amount/total to battery parallel connection
Line parallel connection number)>specific peace multiple and (0<in the battery of bus largest battery voltage-Delta of the voltage-to batteries in parallel connection
Voltage value < maximum allowable pressure difference).
In addition, the present invention also provides a kind of battery parallel transistor in discharge mode in another embodiment of the present invention
Reason method, this method may include following steps S30~S36:
Step S30: there is an at least battery in a bus；
Step S32: one is minimum or bus is gone up in the parallel connection of ceiling voltage battery elder generation；And
Step S34: at least battery when the Delta voltage value of a batteries in parallel connection is a negative value, in bus
In discharge mode；
Step S36: it is sequentially in parallel at least battery progress in bus according to a battery parallel connection permissible pressure,
In, battery parallel connection permissible pressure is maximum allowable charging current (COCI) * [internal resistance of cell+(internal resistance of cell/in the battery of bus
Quantity)].
Therefore, in another embodiment of the present invention, when Delta voltage value is negative value, judge the electricity in bus
Pond is in discharge mode, so battery parallel transistor effectively can be carried out to the battery pack in bus according to above-mentioned steps S30~S36
Reason.
That is, allowing (Yes or No) to be (total to battery parallel connection when selecting minimum battery first upper bus in parallel
Line current amount/bus parallel connection number) <-specific peace multiple and the (electricity of the minimum battery of-maximum allowable pressure difference < in the battery of bus
Voltage-Delta voltage value < 0 of the pressure-to batteries in parallel connection).When selecting highest battery first upper bus in parallel, permit to battery parallel connection
Perhaps (Yes or No) is (bus current amount/bus parallel connection number) <-specific peace multiple and (- maximum allowable pressure difference < in bus
Voltage-Delta voltage value < 0 of the voltage-of largest battery to batteries in parallel connection in battery).
Based on above-mentioned detailed description, when selecting minimum battery first upper bus in parallel, mathematical formulae (1) can be indicated such as
Under:
！SurgeRisk=
(ABS (BusCurrent/P) < 1A) && (| OnBusMinBatteryV-VBatt | < SurgeRiskV))
Or ((BusCurrent/P)>1A) && [0<(OnBusMinBatteryV-VBatt)-DeltaV<
SurgeRiskV]
Or ((BusCurrent/P) < -1A) && [- SurgeRiskV < (OnBusMinBatteryV-VBatt) -
DeltaV<0](1)
Furthermore when selecting highest battery first upper bus in parallel, mathematical formulae (2) can be expressed as follows:
！SurgeRisk=
(ABS (BusCurrent/P) < 1A) && (| OnBusMaxBatteryV-VBatt | < SurgeRiskV))
Or ((BusCurrent/P)>1A) && [0<(OnBusMaxBatteryV-VBatt)-DeltaV<
SurgeRiskV]
Or ((BusCurrent/P) < -1A) && [- SurgeRiskV < (OnBusMaxBatteryV-VBatt) -
DeltaV<0](2)
Wherein, ABS is to take absolute value, and BusCurrent is size of current current on Power line, and P is parallel connection
Number, OnBusMinBatteryV are the smallest battery of voltage in numerous battery packs on Power line, Vbatt be to
Battery in parallel, SurgeRiskV are that battery can bear the maximum current * [internal resistance of cell+(internal resistance of cell/bus battery number
Amount)], DeltaV is voltage of the battery under charge/discharge and unloaded voltage difference, it is worth mentioning at this point that, battery is in charge/discharge
In, because electric current flows into or from, voltage can be several by padded or reduction, can generate a pressure difference with the voltage under battery zero load.
Specifically, battery can pass through communication interface, itself message be exchanged, for example, voltage value, current value in booting
Deng assigning the battery pack of highest or most bottom voltage in advance simultaneously then again by user or current transformer (Inverter) according to application
The instruction of net.After the message and instruction that battery pack collects all battery pack exchanges, has in all battery packs and fill a part condition
Determine whether itself is first grid-connected battery, if all battery voltages are close, in first battery pack and after surfing the Internet, Suo You electricity
Chi Zuying can sequentially complete it is grid-connected, if if there is dry cell batteries to make voltage and other battery pack pressure differences excessive for some reason,
The opportunity close to voltage is filled or be discharged to depending on total net battery again, is carried out grid-connected.
In conclusion a kind of battery parallel connection management method provided by according to the present invention, the present invention have the following advantages that, by
In battery parallel connection management method of the invention can respectively under different mode (standing mode, charge mode and discharge mode),
It effectively improves when battery pack is in parallel connection, high current will not be generated between battery pack and spark will not be generated.
Although having referred to many illustrative embodimentss of the invention describes embodiment, however, it should be noted that this field
Technical staff it is conceivable that various other changes and embodiment, these change and embodiment will fall into the spirit of disclosure principle with
In range.Especially, in the range of the disclosure, schema and attached claim scope, the composition of setting is combined to theme
Partially and/or setting can various changes can be made and modification.In addition to the variation and modification made to component part and/or setting,
Alternative purposes will be apparent to those skilled in the art.
Claims (8)
1. a kind of battery parallel connection management method, which is characterized in that when one stands mode, method includes the following steps:
There is an at least battery in a bus；
One minimum or ceiling voltage battery upper bus first in parallel；And
It is sequentially in parallel at least battery progress in the bus according to a battery parallel connection permissible pressure.
2. battery parallel connection management method according to claim 1, which is characterized in that when electric current is less than specific amperage,
It is then the standing mode.
3. battery parallel connection management method according to claim 2, which is characterized in that be somebody's turn to do when in the first parallel connection of the minimum battery of selection
When bus, to the battery parallel connection allow (Yes or No) be (bus current amount/bus parallel connection number) < specific peace multiple and (|
Voltage of the voltage-of minimum battery to the battery in parallel in the battery of the bus) | < maximum allowable pressure difference, wherein maximum is fair
Perhaps pressure difference=maximum allowable charging current * [internal resistance of cell+(internal resistance of cell/in the number of batteries of the bus)]；When selection highest
Battery first the in parallel upper bus when, allow (Yes or No) to be (bus current amount/bus parallel connection number) < special to the battery parallel connection
Dingan County's multiple and (| voltage of the voltage-of largest battery to the in parallel battery in the battery of the bus) | < maximum allowable pressure
Difference, wherein the maximum allowable pressure difference=maximum allowable charging current * [internal resistance of cell+(and the internal resistance of cell/in the battery number of bus
Amount)], wherein the specific amperage is for determining that battery pack is in standing or charge and discharge, and it is big that numerical value depends on battery capacity
It is small.
4. battery parallel connection management method according to claim 1, which is characterized in that the size of the internal resistance of cell depends on electricity
The size in pond uses time, temperature and chemical property.
5. a kind of battery parallel connection management method, which is characterized in that in a charge mode, method includes the following steps:
There is an at least battery in a bus；
One minimum or ceiling voltage battery upper bus first in parallel；
When the Delta voltage value of a batteries in parallel connection is a positive voltage value, in this of the bus, at least a battery is in the charging
Mode；And
It is sequentially in parallel at least battery progress in the bus according to a battery parallel connection permissible pressure,
Wherein, the battery parallel connection permissible pressure be equal to the maximum allowable charging current * of the battery [internal resistance of cell+(internal resistance of cell/
The number of batteries of the bus)].
6. battery parallel connection management method according to claim 5, which is characterized in that when the Delta voltage of a batteries in parallel connection
When value is a positive voltage value, in this of the bus, at least a battery be in the charge mode, wherein when selecting minimum battery elder generation simultaneously
On connection when the bus, (Yes or No) is allowed to be (bus current amount/bus parallel connection number) > specific peace multiple to the battery parallel connection
And (0 < in the battery of the bus minimum battery voltage-Delta voltage value < maximum allowable pressure of the voltage-to the battery in parallel
Difference), wherein Delta voltage value=voltage of the battery under charge/discharge, with unloaded voltage difference；When selection highest battery is first
In parallel connection when the bus, (Yes or No) is allowed to be (bus current amount/bus parallel connection number) > specific peace times to the battery parallel connection
Number and (0 < in the battery of the bus largest battery voltage-to the in parallel battery voltage-Delta voltage value < it is maximum allowable
Pressure difference).
7. a kind of battery parallel connection management method, which is characterized in that in a discharge mode, method includes the following steps:
There is an at least battery in a bus；
One minimum or ceiling voltage battery upper bus first in parallel；
When the Delta voltage value of a batteries in parallel connection is a negative value, in this of the bus, at least a battery is in the electric discharge
Mode；And
It is sequentially in parallel at least battery progress in the bus, wherein the battery is simultaneously according to a battery parallel connection permissible pressure
Join permissible pressure and is equal to the maximum allowable charging current * of battery [internal resistance of cell+(internal resistance of cell/in the number of batteries of the bus)].
8. battery parallel connection management method according to claim 7, which is characterized in that be somebody's turn to do when in the first parallel connection of the minimum battery of selection
When bus, to the battery parallel connection allow (Yes or No) be (bus current amount/bus parallel connection number) <-specific peace multiple and (-
The voltage-of the minimum battery of maximum allowable pressure difference < in the battery of the bus to the battery in parallel voltage-Delta voltage value <
0)；When selecting highest battery first upper bus in parallel, (Yes or No) is allowed to be (bus current amount/total to the battery parallel connection
Line parallel connection number) <-specific peace multiple and (voltage-of the largest battery of-maximum allowable pressure difference < in the battery of the bus is to parallel connection
Voltage value < 0 voltage-Delta of the battery).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710825213.1A CN109509923A (en) | 2017-09-14 | 2017-09-14 | Battery parallel connection management method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710825213.1A CN109509923A (en) | 2017-09-14 | 2017-09-14 | Battery parallel connection management method |
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Family
ID=65744363
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