CN105911473B - A kind of power battery model-free Fast simulation system and method - Google Patents
A kind of power battery model-free Fast simulation system and method Download PDFInfo
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- CN105911473B CN105911473B CN201610219081.3A CN201610219081A CN105911473B CN 105911473 B CN105911473 B CN 105911473B CN 201610219081 A CN201610219081 A CN 201610219081A CN 105911473 B CN105911473 B CN 105911473B
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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
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
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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
- H01M10/4285—Testing apparatus
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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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Abstract
The invention discloses a kind of power battery model-free Fast simulation system and methods, using the thought of " seeing what is coming from one small clue, from one small clue, one can see what is coming ", by means of one baby battery module of a low-power battery test equipment real-time in-line testing, change and consider the inconsistency of battery pack according to baby battery module voltage, obtain accurate big battery group analog voltage, utilize the PID closed-loop controls to electric current, voltage, to control the output voltage of power battery simulator, the real-time online to power battery pack, quick, accurately simulation are realized.The present invention avoids the simulation error introduced due to battery simulation error without establishing power battery model library in advance；Real-time online, quick, accurately simulation to power battery.
Description
Technical field
The present invention relates to a kind of power battery model-free Fast simulation system and methods.
Background technology
True power battery power supply adaptability and operating flexibility are poor, not only need to be equipped with a large amount of power batteries by model,
And also need to be equipped with Energy Management System monitoring and management so that testing cost rises violently；Charging and test period are long, Bu Nengman
Rapidity, continuity and the chronicity demand tested enough；Especially true power battery is finite energy resource power supply system, and often using must
It declines, cannot repeat and restore the authentic testing under the same terms, should not also carry out such as emergency braking tests, motor and frequently open system
Experiment under the extreme operating conditions such as dynamic test.And power battery artificial intelligence instrument and equipment is then fully able to avoid and solve above-mentioned difficulty
Topic.It can simulate the supplied character of power battery, and flexible controllable, a tractor serves several purposes, test is safe and reliable, can the absorption of feedback in time
The braking energy of test load, greatly reduces R＆D cycle and cost.It especially repeatedly can verify and create safety
Fault state, this, which is true power battery, can never reach.
It is extremely complex and difficult for how simulating power battery time of day, adapting to actual condition, then so that analog meter
Device equipment R＆D work is extremely challenging.This is non-linear and not true with height largely due to the charge and discharge process of power battery
Qualitative, performance parameter is easily numerous by charge-discharge magnification, environment temperature/humidity, state-of-charge, application method and degree of aging etc.
The influence of factor, and intercouple.Dynamic especially caused by battery shock loads or external short circuit when big multiplying power discharging
Process is even more to be difficult to simulate.
As shown in Figure 1, at present frequently with battery simulation method, including battery model, voltage PID controller, battery
Simulator and load.Operation principle is：The input of battery model is load current and initial SOC0, battery model output voltage with
Simulator output voltage compares the input as PID controller, and control battery simulator follows battery model output voltage to change
And change, to realize simulation of the battery simulator to power battery.Main problem existing for this method is：1. it is big to model difficulty
It is low with model accuracy；2. battery model is poor for applicability, need to establish multiple battery model to adapt to the simulation of different classes of battery
Demand；3. simulation cycle is long, needs to carry out a variety of tests to power battery in advance, establish power battery model；4. can not be true
Reflect the output characteristics of true power battery.Therefore, there is an urgent need for simple, the accurately and rapidly battery simulating devices of a kind of model-free
And implementation method, to provide basic guarantee for the operation of battery powered equipment test and Science Explorations.
Invention content
The present invention is to solve the above-mentioned problems, it is proposed that a kind of power battery model-free Fast simulation system and method, this
Invention is by means of one baby battery module of a low-power battery test equipment real-time in-line testing, according to baby battery module voltage
The inconsistency for changing and considering battery pack obtains accurate big battery group voltage, to control power battery simulator
Output voltage, realize to the real-time online of power battery pack, quickly, accurate simulation.
To achieve the goals above, the present invention adopts the following technical scheme that：
A kind of power battery model-free Fast simulation system, including baby battery module, battery charging and discharging test cell, electric current
PID controller, voltage PID controller and battery simulator, wherein the baby battery module voltage grade is the power that need to be simulated
The 1/n of cell voltage grade, the capacitance grade of the baby battery module are the 1/m for the power battery capacitance grade that need to be simulated；Institute
Baby battery module connection battery charging and discharging test cell is stated, the battery simulator is connected with load, battery simulator output
Load current divided by m, as the given value of electric current PID controller, electric current PID controller output end connects battery charging and discharging test
Unit realizes that battery charging and discharging test cell carries out charge-discharge test according to the variation of load current to baby battery module, will be small
The voltage of battery module is converted into power battery voltage, as the given of voltage PID controller, voltage PID controller
Output connection battery simulator.
Preferably, it is provided with current sensor and voltage sensor between the battery simulator and load, detected respectively
Load current and power battery simulator output voltage.
Preferably, it is provided with current sensor between the battery charging and discharging test cell and baby battery module and voltage passes
Sensor measures the charge/discharge current and baby battery module terminal voltage of baby battery module.
Preferably, the power battery that need to be simulated is the big battery group being made of m and n string baby battery modules, wherein n
＞ 1, m ＞ 1.
Preferably, the electric current PID controller adjusts PWM according to the difference of input current and output current, controls the electricity
Pond charge-discharge test unit tests baby battery module according to input current.
Preferably, the voltage of baby battery module is converted into power battery voltage, i.e., baby battery module voltage is multiplied by n,
And consider inconsistency, obtain the analog voltage of big battery group.
The inconsistency refers to, during series, parallel, the voltage of battery cell, remaining capacity, internal resistance, appearance
The influence of amount, self-discharge rate and coulombic efficiency.
A kind of power battery model-free rapid simulation method, includes the following steps：
(1) power battery simulator drives load testing, obtains power battery simulator output voltage and load current；
(2) it by the load current of acquisition divided by m, is realized according to the variation of load current to small electricity using closed loop PID control
Pond module carries out charge-discharge test, the terminal voltage of the baby battery module in being tested；
(3) baby battery module voltage is multiplied by n, and considers inconsistency, obtained the analog voltage of power battery, made
For the given input of power battery simulator；
(4) according to the analog voltage of the power battery of acquisition, the defeated of power battery simulator is realized using closed loop PID control
Go out voltage by the variation of the analog voltage of power battery to change.
Preferably, in the step (1), the load current of acquisition divided by m are operated by microcontroller.
Preferably, in the step (3), microcontroller obtains the terminal voltage of baby battery module by voltage sensor.
In the step (4), voltage PID controller realizes the output electricity of power battery simulator using closed loop PID control
It presses the variation of big battery group analog voltage and changes, to realize a baby battery module pair one by m and n string baby battery moulds
The real-time simulation of the big battery group of block composition.
The operation principle of the present invention, the power battery group for needing to be simulated is divided, " to see what is coming from one small clue-be seen with small
Thought greatly ", it is only necessary to real-time in-line testing is carried out by means of baby battery module of a low-power battery test equipment pair,
The inconsistency for changing and considering battery pack according to baby battery module voltage obtains accurate big battery group analog voltage,
To control the output voltage of power battery simulator, the real-time online to power battery pack, quick, accurately simulation are realized.Nothing
Power battery model library need to be established in advance, avoid the simulation error introduced due to battery simulation error.
Beneficial effects of the present invention are：
(1) it is not necessarily to establish power battery model library in advance, avoids the simulation error introduced due to battery simulation error；
(2) due to need not establish battery model, it can be achieved that the real-time online of power battery, quickly, accurate simulation；
(3) electrochemical reaction complicated inside power battery need not be studied, the know-how of operating personnel is required low；
(4) it only needs baby battery module that online, the accurate simulation of high-power power battery can be realized, reduces to largely moving
The demand of power battery reduces testing cost, reduces environmental pollution；
(5) easy to operate, reliable, all kinds of batteries are can be applied to, are had a wide range of application, especially in electrokinetic cell and application
Field great popularization.
Description of the drawings
Fig. 1 is traditional power battery simulation method schematic diagram；
Fig. 2 is the power battery model-free Fast simulation schematic diagram of the present invention；
Wherein, 1, baby battery module, 2, low-power battery test equipment, 3, electric current PID controller, 4, voltage PID control
Device, 5, power battery simulator, 6, load, 7, current sensor and voltage sensor.
Specific implementation mode：
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
As shown in Figure 1, at present frequently with battery simulation method, including battery model, voltage PID controller, battery mould
Quasi- device and load.Operation principle is：The input of battery model is load current and initial SOC0, battery model output voltage and mould
Quasi- device output voltage compares the input as PID controller, control battery simulator follow battery model output voltage change and
Variation, to realize simulation of the battery simulator to power battery.Main problem existing for this method is：1. model difficulty greatly and
Model accuracy is low；2. battery model is poor for applicability, need to establish multiple battery model to adapt to the simulation need of different classes of battery
It asks；3. simulation cycle is long, needs to carry out a variety of tests to power battery in advance, establish power battery model；4. can not be really anti-
Reflect the output characteristics of true power battery.
The present invention discloses a kind of power battery model-free Fast simulation using the thought of " see what is coming from one small clue-from one small clue, one can see what is coming "
Method, by means of one baby battery module of a low-power battery test equipment real-time in-line testing, according to baby battery module electricity
Buckling and the inconsistency for considering battery pack obtain accurate big battery group voltage, to control power battery simulation
The output voltage of device realizes the real-time online to power battery pack, quick, accurately simulation.
As shown in Fig. 2, a kind of power battery model-free rapid simulation method, including baby battery module 1, low-power battery are surveyed
Try equipment 2, electric current PID controller 3, voltage PID controller 4, power battery simulator 5, load 6, several current sensors and
Several voltage sensors 7.
The connection of power battery simulator 5 load 6 and voltage PID controller 4；
Connection electric current and voltage sensor 7 between power battery simulator 5 and load 6, for detecting load current and moving
Power battery simulator output voltage；
Low-power battery test equipment 2 connects baby battery module 1 and electric current PID controller 3；
It is connected with current sensor and voltage sensor 7 between low-power battery test equipment 2 and baby battery module 1, uses
In the charge/discharge current and baby battery module terminal voltage that measure baby battery module；
Baby battery module voltage grade is the 1/n (n of simulator simulated battery group voltage class>1), the appearance of baby battery module
Amount grade is the 1/m (m of power battery simulator simulated battery pool-size grade>1)；
The output current divided by m of power battery simulator 5 are the input currents of low-power battery test equipment 2；
Electric current PID controller 3 adjusts PWM according to the difference of input current and output current, and control low-power battery test is set
Standby 2 test baby battery module 1 according to input current；
The output voltage of baby battery module 1 in testing is multiplied by n, considers further that the inconsistency of battery pack, obtains power electric
The input voltage of pond simulator 5；
Voltage PID controller 4 adjusts PWM according to the difference of input voltage and output voltage, control power battery simulator 5
Output voltage changes with the transformation of input voltage, to realize a baby battery module pair one by m and n string baby battery moulds
The real-time online of the big battery group of block composition quickly, is accurately simulated；
A kind of above-mentioned power battery model-free rapid simulation method of application, mainly includes the following steps that：
(1) power battery simulator output voltage and load current are obtained：Power battery simulator drives load testing, micro-
Controller obtains power battery simulator output voltage and load current by means of voltage sensor and current sensor；
(2) baby battery module is tested：The load current divided by m that step (1) is obtained, as electric current PID control
Device gives, and realizes low-power battery test equipment according to the variation of load current to baby battery mould by closed loop PID control
Block carries out charge-discharge test；
(3) baby battery module terminal voltage is obtained：Microcontroller tested by means of voltage sensor in baby battery mould
The terminal voltage of block；
(4) big battery group analog voltage is obtained：Baby battery module voltage is multiplied by n, and considers the inconsistent of big battery group
Property, the analog voltage of big battery group is obtained, as power battery simulator is given；
(5) control power battery simulator simulates big battery group：According to the simulation electricity for the big battery group that step (4) obtains
Pressure, voltage PID controller realize that the output voltage of power battery simulator presses big battery group analog voltage using closed loop PID control
Variation and change, to realize the reality of a big battery group being made of m and n string baby battery modules of baby battery module pair
When it is online, quickly, accurate simulation.
Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not protects model to the present invention
The limitation enclosed, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art are not
Need to make the creative labor the various modifications or changes that can be made still within protection scope of the present invention.
Claims (9)
1. a kind of power battery model-free Fast simulation system, it is characterized in that：It is single including baby battery module, battery charging and discharging test
Member, electric current PID controller, voltage PID controller and battery simulator, wherein the baby battery module voltage grade is to need mould
The 1/n of quasi- power battery voltage class, the capacitance grade of the baby battery module are the power battery capacitance grades that need to be simulated
1/m；The baby battery module connects battery charging and discharging test cell, and the battery simulator is connected with load, battery simulation
The load current divided by m of device output, as the given value of electric current PID controller, electric current PID controller output end connection battery fills
Discharge test unit realizes that battery charging and discharging test cell carries out charge and discharge electrical measurement according to the variation of load current to baby battery module
Examination, power battery voltage is converted by the voltage of baby battery module, as the given of voltage PID controller, voltage PID controls
The output of device processed connects battery simulator；
It is provided with current sensor and voltage sensor between the battery simulator and load, detects load current and electricity respectively
Pond simulator output voltage.
2. a kind of power battery model-free Fast simulation system as described in claim 1, it is characterized in that：The battery charging and discharging
It is provided with current sensor and voltage sensor between test cell and baby battery module, measures the charge/discharge of baby battery module
Electric current and baby battery module terminal voltage.
3. a kind of power battery model-free Fast simulation system as described in claim 1, it is characterized in that：It is described need to simulate it is dynamic
Power battery is the big battery group being made of m and n string baby battery modules, wherein n ＞ 1, m ＞ 1.
4. a kind of power battery model-free Fast simulation system as described in claim 1, it is characterized in that：The electric current PID controls
Device processed adjusts PWM according to the difference of input current and output current, controls the battery charging and discharging test cell according to input current
Baby battery module is tested.
5. a kind of power battery model-free Fast simulation system as described in claim 1, it is characterized in that：By baby battery module
Voltage is converted into power battery voltage, i.e., baby battery module voltage is multiplied by n, obtains the analog voltage of big battery group.
6. a kind of analogy method based on the power battery model-free Fast simulation system as described in any one of claim 1-5,
It is characterized in that：Include the following steps：
(1) battery simulator drives load testing, obtains battery simulator output voltage and load current；
(2) it by the load current of acquisition divided by m, is realized according to the variation of load current to baby battery mould using closed loop PID control
Block carries out charge-discharge test, the terminal voltage of the baby battery module in being tested；
(3) baby battery module voltage is multiplied by n, and considers inconsistency, the analog voltage of power battery is obtained, as electricity
The given input of pond simulator；
(4) according to the analog voltage of the power battery of acquisition, realize that the output voltage of battery simulator is pressed using closed loop PID control
The variation of the analog voltage of power battery and change.
7. such as right its require 6 as described in analogy method, it is characterized in that：In the step (1), by the load current of acquisition divided by
M is operated by microcontroller.
8. such as right its require 6 as described in analogy method, it is characterized in that：In the step (3), microcontroller is by voltage sensor
Device obtains the terminal voltage of baby battery module.
9. such as right its require 6 as described in analogy method, it is characterized in that：In the step (4), voltage PID controller is used and is closed
Ring PID control realizes that the output voltage of battery simulator is changed by the variation of big battery group analog voltage, to realize one
The real-time simulation of a big battery group being made of m and n string baby battery modules of baby battery module pair.
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| CN101394096B (en) * | 2007-09-19 | 2010-12-22 | 比亚迪股份有限公司 | Battery pack simulating device |
| CN102570548B (en) * | 2012-01-10 | 2014-04-09 | 长安大学 | Method for simulating power supply of storage battery and power source for achieving same |
| CN203275628U (en) * | 2012-12-20 | 2013-11-06 | 中国北方车辆研究所 | High voltage battery pack external characteristic simulator |
| CN203851060U (en) * | 2014-05-10 | 2014-09-24 | 湖北德普电气股份有限公司 | Power battery simulation device |
| CN103954917B (en) * | 2014-05-22 | 2016-08-24 | 山东大学 | A kind of cell test simulator and implementation method |
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