CN109425832A - Lithium battery capacitance detection method applying compensation calculation method - Google Patents
Lithium battery capacitance detection method applying compensation calculation method Download PDFInfo
- Publication number
- CN109425832A CN109425832A CN201710767516.2A CN201710767516A CN109425832A CN 109425832 A CN109425832 A CN 109425832A CN 201710767516 A CN201710767516 A CN 201710767516A CN 109425832 A CN109425832 A CN 109425832A
- Authority
- CN
- China
- Prior art keywords
- lithium battery
- capacity
- previous
- capacitance
- usoc
- 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.)
- Pending
Links
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 48
- 238000004364 calculation method Methods 0.000 title claims abstract description 24
- 238000001514 detection method Methods 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 31
- 230000001186 cumulative effect Effects 0.000 claims 1
- 230000010354 integration Effects 0.000 abstract description 5
- 238000009825 accumulation Methods 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 238000000518 rheometry Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/3644—Constructional arrangements
- G01R31/3648—Constructional arrangements comprising digital calculation means, e.g. for performing an algorithm
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention provides a lithium battery capacitance detection method applying a compensation calculation method, which comprises the following steps: estimating the initial capacity of a lithium battery by an open-circuit voltage method; after the initial capacity of the lithium battery is obtained, calculating the consumed or supplemented capacity of the lithium battery by a coulomb integration method to obtain the current actual capacity of the lithium battery; and converting the current actual capacitance into the current display capacitance by a compensation calculation method.
Description
Technical field
The present invention is in relation to a kind of battery capacitor quantity measuring method, espespecially a kind of lithium battery capacity using compensation calculation method
Detection method.
Background technique
With advances in technology and the fast development of integrated circuit, many electronic devices are able to downsizing, in addition to light and handy
And except portable basic demand, energy long-time operation has been increasingly becoming necessary demand.
Also, these portable electronic devices (for example, mobile phone, smartphone, digital camera, digital camera,
Laptop etc.) electric power is required to be operated, wherein the source of this electric power is battery (for example, lithium battery), so
There is the portable electronic devices how provided now enough electric power to have become important one of challenge.
Furthermore the charging, electric discharge behavior due to battery are as caused by a succession of chemistry redox reaction, in chemistry
During reaction, there are many factor will have a direct impact on the charging of battery, flash-over characteristic, for example, environment temperature locating for battery
Degree, cell output current size etc..
Also, showing the interior of different battery capacities because different electronic devices needs different battery capacities
Portion's structure or ingredient and its charge and discharge characteristic are also not quite similar.Therefore, it will increase the degree of difficulty of battery capacity detection.
Although some battery capacity detection techniques have been developed in recent years, based on the considerations of cost and accuracy, mesh
Preceding developed battery capacity detection technique simultaneously can not provide the battery capacity detection of high accuracy, therefore, how mention
The important issue of current industry is had become for battery capacitor quantity measuring method that is a kind of effective and having high accuracy.
Summary of the invention
The embodiment of the present invention discloses a kind of lithium battery capacity check method, comprising: by open circuit voltage method, estimation one
The initial capacitance of lithium battery；After the initial capacitance for obtaining the lithium battery, the lithium battery is calculated by coulomb integration method and is disappeared
The capacitance of consumption or supplement, to obtain the currently practical capacitance of the lithium battery；And by compensation calculation method, by the current reality
Border capacitance is converted into currently showing capacitance.Wherein, it is more intuitive to be shown to user/customer currently to show capacitance for this
Capacitance present amount, wherein the compensation calculation method is USOC=previous_USOC+ (M × delta_SOC), and USOC is that this is current
Showing capacitance, previous_USOC is the current display capacitance of previous second, and SOC is the current actual capacitance,
Previous_USOC, USOC and SOC are presented with %, wherein the definition of delta_SOC will be in following detailed description.
In a preferred embodiment of the invention, the open circuit voltage method be by measure the lithium battery in non-loaded state
Under, the open-circuit voltage values measured, the open-circuit voltage values are the initial capacitance.
In a preferred embodiment of the invention, when lithium battery electric discharge, M=previous_USOC/SOC, M are oblique
Rate, previous_USOC are the current display capacitance of previous second, and SOC is the current actual capacitance.
In another preferred embodiment of the present invention, when the lithium battery charges, M=(1-previous_USOC)/(1-
SOC), M is slope, and previous_USOC is the current display capacitance of previous second, and SOC is the current actual capacitance.
In a preferred embodiment of the invention, delta_SOC=(DC-previous_DC)/FCC, DC have been bled off
Capacitance is accumulated, previous_DC is that the accumulation capacitance bled off stops, in other words, DC and previous_DC until the previous second
Difference both be the accumulation capacitance bled off for being poor one second, FCC is fully charged capacity.Wherein, due to magnitude of current i
For instant value, being multiplied by time t is capacitance value Q (i.e. Q=Σ i* △ t), so DC is a capacitance value.
In a preferred embodiment of the invention, the fully charged capacity include the temperature factor, the curent change factor,
Retain capacitance (ReservedCap) and advances for capacitance (PreReservedCap).
In a preferred embodiment of the invention, the lithium battery capacity check method system is by a controller, a micro-control
Device, a processor or a microprocessor processed carry out operation.
Detailed description of the invention
Fig. 1 is a kind of flow chart of lithium battery capacity check method using compensation calculation method of the invention；And
Fig. 2A and Fig. 2 B is that a kind of battery of lithium battery capacity check method using compensation calculation method of the invention is put
The curve graph of electric depth characteristic.
Wherein, the reference numerals are as follows:
S10, S20, S30 step
112 first wire lines
113 first via holes
114 conductive pads
120 electronic type biosensors
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 be not intended to limit the invention enforceable qualifications, therefore not so that those skilled in the art understands and reads
Has technical essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size are not influencing institute of the present invention
Under the effect of capable of generating and the purpose that can reach, disclosed technology contents should all be fallen in and obtain the range that can cover
It is interior.
As shown in Figure 1, the embodiment of the present invention discloses a kind of lithium battery capacity check method using compensation calculation method,
The following steps are included:
Step S10: by open circuit voltage method, estimate the initial capacitance of a lithium battery；
Step S20: after the initial capacitance for obtaining lithium battery, lithium battery consumption or supplement are calculated by coulomb integration method
Capacitance, to obtain the currently practical capacitance of lithium battery；And
Step S30: by compensation calculation method, currently practical capacitance is converted into currently to show capacitance.Wherein, deserve
Preceding display capacitance is to be shown to the more intuitive capacitance present amount of user/customer, wherein the compensation calculation method is USOC=
Previous_USOC+ (M × delta_SOC), USOC are the current display capacitance, and previous_USOC is working as previous second
Preceding display capacitance, SOC are the current actual capacitance, and previous_USOC, USOC and SOC are presented with %.
Specifically, a preferred embodiment according to the present invention, open circuit voltage method is by measurement lithium battery non-loaded
In the state of, the open-circuit voltage values measured, open-circuit voltage values are initial capacitance.
Furthermore a preferred embodiment according to the present invention, as shown in Figure 2 A and 2 B, coulomb integration method can use residual capacitance
(Remaining Capacity, RC) and the fully charged capacity of battery (Full Charge Capacity, FCC) are measured to calculate
Currently practical capacitance (Stat of Charge, SOC), i.e., as follows:
SOC=RC/FCC
Temperature factor is added in a preferred embodiment according to the present invention, the present invention in the fully charged capacity of battery (FCC)
And curent change factor, therefore, the fully charged capacity of battery (FCC) may be expressed as:
FCC=Qmax × Table (Qt) × Table (Qi)-ReservedCap-PreReservedCap,
Also, as shown in Figure 2 B, Qmax may be expressed as:
Qmax=PassedCharge/ (DOD0-DOD1)
Wherein RC may be expressed as:
RC=FCC-DC
Wherein, Qmax is the ideal capacity value that battery core factory provides, and PassedCharge is to pass through the magnitude of current, DOD (Depth
Of Discharge) it is depth of discharge, Table (Qt) is to be obtained at different temperatures with testing, and Table (Qi) is in different electricity
It is obtained under rheology with testing, ReservedCap is to retain capacitance and PreReservedCap to advance for capacitor
Amount.
Also, since the temperature and electric current of battery are changing all the time, so the fully charged capacity of battery (FCC) also can
It is constantly be generated variation, so will also result in currently practical capacitance (SOC) with the change of the fully charged capacity of battery (FCC)
And change.Therefore, lithium battery capacity check method of the invention also includes compensation calculation method, wherein compensation calculation Fa Kebiao
It is shown as
USOC=previous_USOC+ (M × delta_SOC)
Wherein, USOC is current display capacitance, and previous_USOC is the current display capacitance of previous second, is worth
It is noted that previous_USOC, USOC and SOC are presented with %.Wherein, the definition of delta_SOC will be in saying in detailed below
It is bright.
A preferred embodiment according to the present invention, when lithium battery electric discharge, M=previous_USOC/SOC, M are slope,
Previous_USOC is the current display capacitance of previous second, and SOC is currently practical capacitance.
Another preferred embodiment according to the present invention, when lithium battery charging, M=(1-previous_USOC)/(1-
SOC), M is slope, and previous_USOC is the current display capacitance of previous second, and SOC is currently practical capacitance.
Furthermore the related part delta_SOC, delta_SOC be represented by delta_SOC=(DC-previous_DC)/
FCC, wherein DC is the accumulation capacitance bled off, and previous_DC is that the accumulation capacitance bled off is stopped until the previous second,
In other words, the difference of DC and previous_DC is that the two is the poor one second accumulation capacitance bled off, and FCC is that battery is complete
Full charge capacity.
It is worth noting that, another preferred embodiment according to the present invention, the fully charged capacity of battery (FCC) may include temperature
Degree factor, curent change factor retain capacitance (ReservedCap) and advance for capacitance
(PreReservedCap)。
In a preferred embodiment of the invention, lithium battery capacity check method of the invention can by a controller,
One of one microcontroller, a processor and a microprocessor carry out operation.
In summary, presently preferred embodiments of the present invention discloses a kind of lithium battery capacity check method, opens a way through combining
Voltage method, coulomb integration method, compensation calculation method and temperature factor and curent change factor can rapidly and accurately detect lithium electricity
The capacitance in pond, other than the capacitance of detection lithium battery, the present invention is also applicable to the battery capacity of detection other forms.
However, effect of the invention is only illustrated in above-described embodiment, it is and is not intended to limit the present invention, any to be familiar with sheet
Without departing from the spirit and scope of the present invention, modifications and changes are made to the above embodiments by the technical staff in field.This
Outside, the quantity of the component in those above-mentioned embodiments is only to be illustrated, and is also not intended to limit the invention.Therefore the present invention
Rights protection scope, should be as listed by scope of the claims below.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710767516.2A CN109425832A (en) | 2017-08-31 | 2017-08-31 | Lithium battery capacitance detection method applying compensation calculation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710767516.2A CN109425832A (en) | 2017-08-31 | 2017-08-31 | Lithium battery capacitance detection method applying compensation calculation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109425832A true CN109425832A (en) | 2019-03-05 |
Family
ID=65505213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710767516.2A Pending CN109425832A (en) | 2017-08-31 | 2017-08-31 | Lithium battery capacitance detection method applying compensation calculation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109425832A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010022518A1 (en) * | 2000-03-13 | 2001-09-20 | Kaoru Asakura | Capacity estimation method, degradation estimation method and degradation estimation apparatus for lithium-ion cells, and lithium-ion batteries |
| CN101966820A (en) * | 2010-08-26 | 2011-02-09 | 清华大学 | On-line monitoring method for self-adaptively correcting lithium ion battery state-of-charge |
| CN105676135A (en) * | 2016-01-13 | 2016-06-15 | 北京航天发射技术研究所 | Online estimation method of power lead-acid battery of special engineering vehicle |
-
2017
- 2017-08-31 CN CN201710767516.2A patent/CN109425832A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010022518A1 (en) * | 2000-03-13 | 2001-09-20 | Kaoru Asakura | Capacity estimation method, degradation estimation method and degradation estimation apparatus for lithium-ion cells, and lithium-ion batteries |
| CN101966820A (en) * | 2010-08-26 | 2011-02-09 | 清华大学 | On-line monitoring method for self-adaptively correcting lithium ion battery state-of-charge |
| CN105676135A (en) * | 2016-01-13 | 2016-06-15 | 北京航天发射技术研究所 | Online estimation method of power lead-acid battery of special engineering vehicle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101436690B (en) | Method, device and terminal equipment for determining charging time | |
| TWI478418B (en) | Calibration method and system for discharging curve of a battery | |
| CN103852725B (en) | For estimating equipment, the method and system of battery remaining power | |
| CN102854471B (en) | Battery meter metering method and measuring apparatus | |
| TW200844466A (en) | Battery remaining capacity predicting apparatus | |
| TW201619630A (en) | Method and apparatus for measuring electric quantity of battery | |
| TW201621338A (en) | Battery capacity estimating apparatus and battery capacity estimating method thereof | |
| CN109256825B (en) | Charging method and electronic device | |
| US8082116B2 (en) | Method for estimating life status of lithium battery | |
| US9077197B2 (en) | Battery residual amount measurement system, computer-readable medium storing battery residual amount measurement program, and battery residual amount measurement method | |
| JP2013092521A (en) | Power source enabling automatic measurement of service life, and method for measurement of power source service life | |
| TWI528043B (en) | Battery SOC/SOH estimation circuit | |
| CN107037369A (en) | Method for accurately estimating percentage of electric quantity of battery and power management device | |
| CN105004928B (en) | Method for measuring at least one resistance parameter and electronic device | |
| CN104914381B (en) | A kind of battery capacity of mobile terminal smoothly displaying method and system | |
| JP5879016B2 (en) | High voltage battery charging simulation system and charging simulation method using the same | |
| EP2897248A1 (en) | Mobile electronic device and charge control method | |
| CN109425829A (en) | Method for detecting lithium battery capacitance | |
| US20140100802A1 (en) | Method and computer system for measuring remaining battery capacity | |
| CN105759210A (en) | Device and method for measuring electric quantity of battery module | |
| US20160079775A1 (en) | Charging Current Setting Method and Charging Module | |
| TWI522789B (en) | Electronic device and power detection method | |
| CN109425832A (en) | Lithium battery capacitance detection method applying compensation calculation method | |
| TWI640792B (en) | Lithium battery capacity detecting method using compensation calculation method | |
| TWI640791B (en) | Lithium battery capacity detection method |
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 | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190305 |
|
| WD01 | Invention patent application deemed withdrawn after publication |