CN110534817A - A kind of effective passive equalization algorithm - Google Patents
A kind of effective passive equalization algorithm Download PDFInfo
- Publication number
- CN110534817A CN110534817A CN201810498305.8A CN201810498305A CN110534817A CN 110534817 A CN110534817 A CN 110534817A CN 201810498305 A CN201810498305 A CN 201810498305A CN 110534817 A CN110534817 A CN 110534817A
- Authority
- CN
- China
- Prior art keywords
- soc
- maximum
- equalization algorithm
- battery
- passive equalization
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The present invention provides a kind of effective passive equalization algorithm, method includes: that battery management unit reception record stands later maximum, most trifle SOC every time；Maximum, most trifle SOC is recorded after each charging complete；Maximum SOC difference and corresponding position are estimated by particular probability statistical method, judge whether SOC difference reaches threshold value；It is another to need to consume electricity according to the specific single string of batteries of SOC difference calculating and implement passive equilibrium to it, until reaching institute's electricity demand requirement.Reach the target for extending battery pack service life.
Description
Technical field
The present invention relates to the high-end equipment technology fields of new-energy automobile, and in particular to a kind of effective passive equalization algorithm.
Background technique
The innovation paces of domestic and international new-energy automobile the relevant technologies are increasingly accelerated, new-energy automobile especially pure electric vehicle
The Industrialization of automobile is also being travelled day and night.But one of power battery consistency problem the problem of being exactly wherein.With with
Increasingly promotion of the family to pure electric automobile performance requirements, power battery consistency problem also become pendulum in face of industry development
How " insinuating language " that can't steer clear of together, effectively solve the problems, such as battery consistency, becomes the pass of new-energy automobile industry sound development
Key.
Battery balanced meaning is exactly to utilize power electronic technique, keeps lithium-ion battery monomer voltage or battery voltage inclined
Difference is maintained in expected range, to guarantee that each single battery keeps same state in normal use, to avoid mistake
It fills, the generation of over-discharge.
The voltage differences that the capacity individual difference and self-discharge rate that battery generates in use generate carry out balanced
A kind of method.Its major function is no matter battery pack is in charging, electric discharge or placement process, all using in internal battery pack
Otherness between battery cell is carried out it is balanced, it is each due to being generated in itself and use process after battery group to eliminate
Kind inconsistency.But since the energy transfer in balancing procedure can generate heat waste due to characteristic because of the balanced power supply itself the effect of
The variation of polarization resistance, can not really be solved with simple balancing energy mode in the electrochemical properties of consumption and battery
Problem.
In recent years, more and more products use lithium ion battery as main power source, mainly due to lithium ion battery
With small in size, energy density height, memory-less effect, the advantages such as cycle life is high, and self-discharge rate is low；But lithium ion battery simultaneously
Group is very high to single battery coherence request, and the inconsistency of each single battery is excessive, it will reduces the available appearance of battery pack
Amount, is not able to satisfy requirement, needs to take balanced measure to extend battery pack service life to ensure battery with two side terminals.
Summary of the invention
The present invention provides a kind of effective passive equalization algorithm, it is passive balanced according to SOC that the present invention can be realized battery
Difference calculates specific single string of batteries and needs to consume electricity and implement passive equilibrium to it, until reaching institute's electricity demand requirement.Reach
Extend the target of battery pack service life.
Technical scheme is as follows:
A kind of effective passive equalization algorithm, method include:
Maximum, most trifle SOC value when standing and charge by record estimates battery pack maximum SOC with particular probability statistical method
Difference, judges whether the difference reaches threshold value, calculates according to SOC difference and needs balanced electricity, and progress is balanced, until balanced electricity
Amount, which reaches, calculates electricity requirement.
The working principle of the invention:
The present invention carries out a kind of passive equalization algorithm of charge control, pond administrative unit by battery management system to lithium battery pack
It receives and records and stand later maximum, most trifle SOC value every time；Maximum, most trifle SOC is recorded after each charging complete；
Maximum SOC difference and corresponding position are estimated by particular probability statistical method, judge whether SOC difference reaches threshold value；Another foundation
SOC difference calculates specific single string of batteries and needs to consume electricity and implement passive equilibrium to it, until reaching institute's electricity demand requirement.
Beneficial effects of the present invention:
1. the present invention, once judgement is i.e. executable, does not need to determine by improving in conventional effective passive equalization algorithm
It is effectively to extend time for balance discharging or charging, so that passive equilibrium comes into force, reach extension single battery uses the longevity
Life；
2. the method for the present invention is implemented to estimate that requirement of real-time is not high to SOC, reachable after only terminating after the standing with charging
To higher estimated accuracy, passive equilibrium purpose and accuracy are higher.
Detailed description of the invention
The attached drawing constituted part of this application is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart of passive equalization algorithm described in the prior art；
Fig. 2 is the flow chart of passive equalization algorithm method described in the embodiment of the present invention.
Specific embodiment
The embodiment of the present invention is described in detail below in conjunction with attached drawing, but the present invention can be defined by the claims
Implement with the multitude of different ways of covering.
Embodiment:
A kind of effective passive equalization algorithm, referring to Fig. 1, this method comprises:
S100: preparation: default SOC initial value；
S101: maximum, minimum SOC value when standing is automatically recorded；
S102: maximum, minimum SOC value when charging is automatically recorded；
S103: Probability estimate obtains maximum SOC difference and corresponding position, into S104；
S104: SOC difference and corresponding position are not met according to S103 Statistic analysis, into S105；
S105: passive equilibrium is counted according to S103 and does not meet SOC difference and corresponding position；Until meeting S103
By above-mentioned passive equalization methods, the present invention, which is solved and is often easy to appear, not to be full charge and is judged as full charge shape
The problem of state, and while preventing lithium battery pack from overcharging, guarantee that lithium battery pack reaches fully charged state, avoids monomer lithium electric
Pond damage, extends the service life cycle of single lithium battery, while guaranteeing that lithium battery pack reaches fully charged state.
Claims (2)
1. a kind of effective passive equalization algorithm, which is characterized in that
In interrupted charging process, once determining to can be performed, do not need to determine to be to discharge or charging, when effectively extension is balanced
Between, so that passive equilibrium comes into force.
2. a kind of effective passive equalization algorithm as described in claim 1, which is characterized in that
During constant-voltage charge, method is implemented to estimate that requirement of real-time is not high to SOC, only after the standing, and charging end
Afterwards, it can reach higher estimated accuracy, passive equilibrium purpose and accuracy are higher.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810498305.8A CN110534817A (en) | 2018-05-23 | 2018-05-23 | A kind of effective passive equalization algorithm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810498305.8A CN110534817A (en) | 2018-05-23 | 2018-05-23 | A kind of effective passive equalization algorithm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110534817A true CN110534817A (en) | 2019-12-03 |
Family
ID=68656341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810498305.8A Withdrawn CN110534817A (en) | 2018-05-23 | 2018-05-23 | A kind of effective passive equalization algorithm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110534817A (en) |
-
2018
- 2018-05-23 CN CN201810498305.8A patent/CN110534817A/en not_active Withdrawn
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20191203 |
|
| WW01 | Invention patent application withdrawn after publication |