CN110031679A - A kind of inner walkway technology based on forming and capacity dividing power supply - Google Patents
A kind of inner walkway technology based on forming and capacity dividing power supply Download PDFInfo
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- CN110031679A CN110031679A CN201910243065.1A CN201910243065A CN110031679A CN 110031679 A CN110031679 A CN 110031679A CN 201910243065 A CN201910243065 A CN 201910243065A CN 110031679 A CN110031679 A CN 110031679A
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- 238000005516 engineering process Methods 0.000 title claims abstract description 24
- 238000005070 sampling Methods 0.000 claims abstract description 54
- 238000012360 testing method Methods 0.000 claims abstract description 32
- 238000004891 communication Methods 0.000 claims abstract description 7
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- 238000004422 calculation algorithm Methods 0.000 claims description 4
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- 238000005457 optimization Methods 0.000 claims description 3
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
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- 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
- G01R31/40—Testing power supplies
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- 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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- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Tests Of Electric Status Of Batteries (AREA)
Abstract
The present invention relates to digital power technical fields, more particularly to a kind of inner walkway technology based on forming and capacity dividing power supply, present system is made of hardware power, sampling system and software control system, the hardware power provides electric current, DC current is obtained by the software control system, the sampling system is used for battery side sampling with high precision；Measuring accuracy of the present invention is high, using height sampling grade combination high current dynamic property control, detection accuracy is promoted from scheme, reduce measurement error caused by battery polarization internal resistance, software scenario is using high performance DSP as control chip, hardware has HPWM high-precision output module, has 16 grades of SPI FIFO to support higher sampling communication, there is faster floating-point operation performance.Power battery inner walkway instrument dosage is saved, Battery formation partial volume equipment belongs to commonly used equipment, and equipment cost is well below test equipment.Battery scale detection can be achieved.Production efficiency is accelerated under the premise of save the cost.
Description
Technical field
The present invention relates to digital power technical fields, and in particular to a kind of inner walkway skill based on forming and capacity dividing power supply
Art.
Background technique
As new-energy automobile is largely popularized, the power battery demand that new-energy automobile uses constantly increases.Power battery
Because of its risk high safety standard, each piece of battery has to pass through forming and capacity dividing test, serves as Battery formation partial volume charge and discharge
The forming and capacity dividing power supply of one of the equipment of test assignment occupies very big specific gravity in power battery production detection.With cell tube
The continuous development of reason demand, Battery formation partial volume power source design constantly step up, and digital power technology is applied to forming and capacity dividing
Power supply is also more extensive, using DSP (digital signal processor) as control unit digital power because of its distinctive function
It is also used widely with performance.And internal resistance of cell detection is as an important indicator in battery testing, is always that battery is surveyed
The priority and difficulty of examination, common internal resistance of cell test is using dedicated internal resistance of cell analysis-e/or determining, using circuit test battery
The method of internal resistance is also widely used.
1, DSP (digital signal processor) digital power
Based on DSP microprocessor controller platform.Using the voltage and current sampled data of circuit be sent directly into controller as
Control input, microprocessor have PWM drive control module, output pwm signal control circuit switch.DSP tradition MUC relatively
(microcontroller), all feedback and control function are all completed in DSP digital processing unit in power supply, unique multiplying
Unit can complete multiplying more multitask within time monocycle, realize stronger control algolithm.Power supply is controlled, is improved
The reaction speed and output accuracy of control, are widely used in power battery application aspect.
2, internal resistance of cell detection method background technique
In power battery forming and capacity dividing detection process, a large amount of power supplys is needed to carry out charge and discharge cycles survey to power battery
Examination, and measure the battery parameters such as battery steady state voltage, battery capacity, the internal resistance of cell, DC impedance.Wherein the internal resistance of cell measurement compared with
For complexity, influenced vulnerable to a variety of disturbing factors.Currently used internal resistance of cell detection mainly has DC internal resistance mensuration and hands over
Flow internal resistance measurement method.
1) DC internal resistance mensuration
Test equipment allows battery to pass through a stable DC stream in a short time, at the same measure battery current variation before
Voltage afterwards calculates present battery internal resistance with by current ratio by voltage change pressure difference.IEC test method requires battery to be full of
After electricity, with 0.2C electric discharge 10s, then with 1C electric discharge 1S.This test method has many limitations:
High capacity cell can only be measured, baby battery is unable to satisfy test condition since load current is smaller
When battery passes through high current, the electrode of inside battery generates polarization due to its chemical property generation polarization phenomena
Internal resistance, the test of the extreme influence internal resistance of cell.
A large amount of overload currents have an impact battery performance.
2) AC internal resistance test method
Test equipment (commonly uses 1kHZ, the small electricity of 50mA to the stable low current of the size of one fixed frequency of battery at present
Stream), by being filtered rectification to AC compounent to battery voltage sampling.
AC internal Resistance sampling method advantage and disadvantage:
Applied widely, low current convenient test is realized, the requirement to battery is low.
Test request is high, and since low current sampling precision requires height, electric current is vulnerable to interference.
Special test equipment is needed to realize AC internal Resistance test.
It can only can not be used using amperometric in high capacity cell testing field.
Summary of the invention
In view of the deficiencies of the prior art, the invention discloses a kind of inner walkway technologies based on forming and capacity dividing power supply, originally
Invention improves traditional forming and capacity dividing power supply, realizes that scale Battery formation partial volume power supply tests the internal resistance of cell.From cost with answer
Use, which is closed, solves the problems, such as power battery internal resistance measurement.
The present invention is achieved by the following technical programs:
A kind of inner walkway technology based on forming and capacity dividing power supply, which is characterized in that the system of the inner walkway technology
It is made of hardware power, sampling system and software control system, the hardware power provides electric current, by the software control system
System obtains DC current, and the sampling system is used for battery side sampling with high precision.
Preferably, the hardware power uses bi-directional DC-DC Buckboost circuit, completes input direct-current bus to battery
Level translation, realize battery output control.
Preferably, the hardware power output end is filtered using LC, reduces output ripple, reduces sampling noise, power
Element uses IGBT, and driving uses PWM control mode.
Preferably, the sampling system is by sampling A/D chip, communicating circuit, operational amplifier circuit filter circuit, protection circuit group
At.
Preferably, the sampling system samples electric power main circuit operating parameter and power battery state samples, and receives
Operating mode, initial configuration information from system software are communicated by SPI sampled data being transferred to master control system, at
Sampled data is uploaded in real time after function operation.
Preferably, the software control system uses CLA processor, is based on dual processor operating mode, is controlled using feedforward
System, feedforward filtering and pattern-recognition.
Preferably, the software control system of the inner walkway technology includes following processing step:
The a small amount of controls of S1 test pretreatment operation, test the channel parameters on basis, during which wait external sampling system feedback
Data.
S2 waits circuit in initial state is stablized, and then according to the feed-forward mode parameter of input, carries out output control, from
Outside obtains sampled data.
S3 data acquisition, into data processing.
S4 is adjusted feedforward control amount by feedforward filtering algorithm, influence of the processing from the bus fluctuation of load
Divided data.
S5 is used with new feed forward control data, is again introduced into feedforward control test, according to setting testing time, completes to survey
Data are passed through communication output by examination.
Preferably, in the S1, by Data Integration if successful operation, it is initial out to input the conduct of feed-forward mode module
Change data；Data are conveyed to CLA core by feedforward control, are controlled into CLA.
Preferably, in the S3, processing result is controlled for subsequent PI and parameter optimization, and subsequent PI is controlled circuit control
In stable state, optimised parameter is exported system.
The invention has the benefit that
1) measuring accuracy is high, and using height sampling grade combination high current dynamic property control, detection essence is promoted from scheme
Degree reduces measurement error caused by battery polarization internal resistance.
As core of the invention technology contents, by the present invention in that increase sampling precision with external dedicated sampling module,
Control performance is greatly promoted by core control algolithm.Finally obtain the internal resistance of cell measurement accuracy of high quality.
2) using high performance DSP as control chip, hardware has HPWM high-precision output module, has software scenario
16 grades of SPI FIFO support higher sampling communication, there is faster floating-point operation performance.
3) power battery inner walkway instrument dosage is saved, Battery formation partial volume equipment belongs to commonly used equipment, equipment cost
Well below test equipment.
4) battery Inner Resistance Tester in Virtual Instrument device is usually to be provided by instrument and equipment manufacturer, and use occasion is mainly special battery internal resistance
Test.It is not applicable to be tested with extensive battery production.Inner walkway function is integrated in forming and capacity dividing power supply by the present invention, can be real
Existing battery scale detection.Production efficiency is accelerated under the premise of save the cost.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is invention software control system principle steps figure；
Fig. 2 is hardware power circuit diagram of the present invention；
Fig. 3 is sampling system sampling comparison circuit schematic diagram of the present invention；
Fig. 4 is sampling system sampling A/D chip communicating circuit schematic diagram of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
Embodiment 1
Present embodiment discloses a kind of inner walkway technologies based on forming and capacity dividing power supply, which is characterized in that the internal resistance
The system of measuring technology is made of hardware power, sampling system and software control system, and the hardware power provides electric current, is passed through
The software control system obtains DC current, and the sampling system is used for battery side sampling with high precision.
Hardware power use bi-directional DC-DC Buckboost circuit, complete input direct-current bus to battery level translation,
Realize the output control of battery.
Hardware power output end is filtered using LC, reduces output ripple, reduces sampling noise, and power component uses
IGBT, driving use PWM control mode.
Sampling system is made of sampling A/D chip, communicating circuit, operational amplifier circuit filter circuit, protection circuit.
Sampling system samples electric power main circuit operating parameter and power battery state samples, and receives and comes from system software
Operating mode, initial configuration information, communicated by SPI and sampled data be transferred to master control system, after successful operation in real time
Upload sampled data.
Software control system uses CLA processor, is based on dual processor operating mode, is filtered using feedforward control, feedforward
And pattern-recognition.
Embodiment 2
Present embodiment discloses a kind of DC internal resistance measuring technologies based on DSP digital power.By increasing external sampling
Detection scheme is realized and is sampled to the precision of battery.Development system control unit realizes the precision controlling to battery.Pass through software
The internal resistance detection function of function realization power battery.System is made of hardware power, sampling system, software control system.
1) power supply hardware plan
As shown in Fig. 2, hardware power uses bi-directional DC-DC (DC DC transformation) Buckboost (lifting/voltage reducing converter)
Circuit completes input direct-current bus to the level translation of battery, realizes the output control of battery.Output end uses LC (passive filter
Wave device) filtering, for reducing output ripple, reduction sampling noise increases.Major power element is used using IGBT (insulated gate pair
Bipolar transistor), driving uses PWM (pulse width modulation) control mode.
2) sampling system
Sampling system is made of sampling A/D chip, communicating circuit, operational amplifier circuit filter circuit, protection circuit.It realizes to electricity
The sampling of source main circuit operating parameter and the sampling of power battery state receive the operating mode from system software, initialization is matched
Confidence breath, is communicated by SPI sampled data being transferred to master control system, upload sampled data after successful operation in real time.
Comparison circuit schematic diagram is sampled as shown in figure 3, sampling A/D chip communicating circuit schematic diagram is as shown in Figure 4.
3) software control system
Software control system is core of the invention content.Undertake the basic control to power supply, the communication of sampling system and
Management, power battery inner walkway software scenario are realized.
CLA (control law accelerator) is used as an independently operated processor, has independent ram space, equally can be
Monocycle completes floating-point operation, can synchronize main core operation, independently undertakes processor active task, uses the main control of CLA completion in the design
Task processed completes communication, sampling and data subsequent processing task using the main core of CPU.
Based on dual processor operating mode, core algorithm is used: feedforward control, feedforward filtering, pattern-recognition.
Process is as shown in Figure 1:
1) a small amount of controls of test pretreatment, first operation, test the channel parameters on basis, during which wait external sampling system
Feedback data.By Data Integration if successful operation, feed-forward mode module is inputted as initialization data out.Feedforward control
Data are conveyed to CLA core, are controlled into CLA.
2) CLA kernel processes, waiting circuit, which is in, first stablizes initial state, is then joined according to the feed-forward mode of input
Number, carries out output control, at this time by a period of time (1-2ms) of program operation, obtains sampled data from outside.Complete data
Acquisition, into data processing.Processing result is controlled for subsequent PI and parameter optimization.Subsequent PI control is by circuit control steady
Determine state, optimised parameter is exported.
In CLA in the nuclear control stage, it is also necessary to influence of the processing from the bus fluctuation of load, before this partial data passes through
Filtering algorithm is presented, feedforward control amount is adjusted.
3) iteration is tested, and using with new feed forward control data, is again introduced into feedforward control test.It is surveyed according to setting
Number is tried, test is completed, data are passed through into communication output.
The present embodiment is used integrates inner walkway function on Battery formation partial volume power supply, functionally realizes innovation.Software
Control method innovation.Increase feedforward pretreatment link, realizes the estimation to battery parameter.Using the calculation of pattern-recognition feedforward parameter
Method, control battery current obtain very high dynamic property.It is higher to be obtained with new model parameter using parameter recursive fashion for precision
Battery internal resistance data.Using independent sampling system, is controlled in conjunction with the high dynamic performance of battery current, obtain very high sampling
Precision.It is completed in a short time one-shot measurement, to evade the test difficult point generated by battery polarization internal resistance.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
Invention is explained in detail, those skilled in the art should understand that: it still can be to aforementioned each implementation
Technical solution documented by example is modified or equivalent replacement of some of the technical features；And these modification or
Replacement, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (9)
1. a kind of inner walkway technology based on forming and capacity dividing power supply, which is characterized in that the system of the inner walkway technology by
Hardware power, sampling system and software control system are constituted, and the hardware power provides electric current, by the software control system
DC current is obtained, the sampling system is used for battery side sampling with high precision.
2. the inner walkway technology according to claim 1 based on forming and capacity dividing power supply, which is characterized in that the hardware electricity
Source uses bi-directional DC-DC Buckboost circuit, completes input direct-current bus to the level translation of battery, realizes the output of battery
Control.
3. the inner walkway technology according to claim 2 based on forming and capacity dividing power supply, which is characterized in that the hardware electricity
Source output terminal is filtered using LC, reduces output ripple, reduces sampling noise, and power component uses IGBT, and driving is controlled using PWM
Mode processed.
4. the inner walkway technology according to claim 1 based on forming and capacity dividing power supply, which is characterized in that the sampling system
System is made of sampling A/D chip, communicating circuit, operational amplifier circuit filter circuit, protection circuit.
5. the inner walkway technology according to claim 4 based on forming and capacity dividing power supply, which is characterized in that the sampling system
System samples the sampling of electric power main circuit operating parameter and power battery state, receives operating mode from system software, just
Beginningization configuration information is communicated by SPI sampled data being transferred to master control system, uploads sampled data after successful operation in real time.
6. the inner walkway technology according to claim 1 based on forming and capacity dividing power supply, which is characterized in that the software control
System processed uses CLA processor, is based on dual processor operating mode, uses feedforward control, feedforward filtering and pattern-recognition.
7. the inner walkway technology based on forming and capacity dividing power supply of any one described in -6, feature exist according to claim 1
In the software control system of the inner walkway technology includes following processing step:
The a small amount of controls of S1 test pretreatment operation, test the channel parameters on basis, during which wait external sampling system feedback data；
S2 waits circuit in initial state is stablized, and then according to the feed-forward mode parameter of input, output control is carried out, from outside
Obtain sampled data；
S3 data acquisition, into data processing；
S4 is adjusted feedforward control amount by feedforward filtering algorithm, handles the score of the influence from the bus fluctuation of load
According to；
S5 is used with new feed forward control data, is again introduced into feedforward control test, according to setting testing time, completes test,
Data are passed through into communication output.
8. the inner walkway technology according to claim 7 based on forming and capacity dividing power supply, which is characterized in that in the S1,
By Data Integration if successful operation, feed-forward mode module is inputted as initialization data out；Feedforward control is defeated by data
CLA core is given, is controlled into CLA.
9. the inner walkway technology according to claim 7 based on forming and capacity dividing power supply, which is characterized in that in the S3,
Processing result is controlled for subsequent PI and parameter optimization, and subsequent PI control is by circuit control in stable state, optimised ginseng
Number is exported.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910243065.1A CN110031679B (en) | 2019-03-28 | 2019-03-28 | Internal resistance testing method based on chemical composition capacitance-grading power supply |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910243065.1A CN110031679B (en) | 2019-03-28 | 2019-03-28 | Internal resistance testing method based on chemical composition capacitance-grading power supply |
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| CN110031679A true CN110031679A (en) | 2019-07-19 |
| CN110031679B CN110031679B (en) | 2022-06-03 |
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| CN206583938U (en) * | 2017-03-03 | 2017-10-24 | 惠州市鼎力智能科技有限公司 | Test switching circuit for component capacitive equipment |
| CN108732524A (en) * | 2018-07-06 | 2018-11-02 | 山东大学 | A kind of the automation Calibration Circuit and system of forming and capacity dividing test power supply |
-
2019
- 2019-03-28 CN CN201910243065.1A patent/CN110031679B/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1403829A (en) * | 2001-09-12 | 2003-03-19 | 广州擎天实业有限公司电工分公司 | Auto asynchronous battery grading method |
| WO2012101510A1 (en) * | 2011-01-27 | 2012-08-02 | Solaredge Technologies Ltd. | Testing of a photovoltaic panel |
| CN102437629A (en) * | 2011-11-01 | 2012-05-02 | 电子科技大学 | Battery charging control device |
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| CN110031679B (en) | 2022-06-03 |
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