CN105989201A - Method and device for simulating dynamic discharge of battery - Google Patents
Method and device for simulating dynamic discharge of battery Download PDFInfo
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- CN105989201A CN105989201A CN201510058176.7A CN201510058176A CN105989201A CN 105989201 A CN105989201 A CN 105989201A CN 201510058176 A CN201510058176 A CN 201510058176A CN 105989201 A CN105989201 A CN 105989201A
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Abstract
The invention provides a method and device for simulating dynamic discharge of a battery. The method comprises the following steps: loading parameters for testing load current in advance; loading the parameters for testing the load current to a diffusion method analysis model for estimation, and calculating by using the diffusion method analysis model, so as to obtain SOC of the battery under a load condition; by using the estimated SOC, converting to obtain EMF and over-voltage internal resistance corresponding to SOC by checking a relationship table; calculating a battery end voltage VLoad according to EMF, the over-voltage internal resistance and the load current at the moment. The device comprises an input interface, a memory, a processing module, a conversion module and a calculation module. As SOC is estimated by using the diffusion method analysis model, together with the circuit model, physical parameters of EMF, over-voltage internal resistance, discharge time, and the like can be converted, the physical parameters obtained through simulation can be taken as reference for circuit design, and designers can be assisted to complete circuit design with optimal circuit properties.
Description
Technical field
The present invention relates to method and the device of simulated battery dynamic discharge of a kind of simulated battery dynamic discharge, the method for the simulated battery dynamic discharge of a kind of circuit design providing analog information accurately to assist designer to complete to optimize and the device of simulated battery dynamic discharge to circuit performance.
Background technology
There are many different battery models to be published and use at present, but the simulation behavior of these battery models be typically to obtain, such as specific purpose: the estimation of battery design, usefulness and breadboardin, and battery model substantially can be categorized into three kinds:
(1) electrochemical model: according to the equivalent model of the chemical reaction construction of inside battery, use specific battery information, as: positive electrode, isolating membrane thickness, concentration of electrolyte ... wait as basis of design during model reaction, and this kind of model is generally only and uses for specific battery, although can very close to practical situation when reflecting charging, discharging electric batteries, but owing to battery parameter is difficult to obtain, and simulation sets numerous and diverse, so having many restrictions when class model uses.
(2) experience/mathematical model: utilize equation that empirical law approximates or the battery model that mathematical algorithm is derived, and obtain behavior when approximating cell reaction, operation time, capacitance and efficiency such as battery ... etc., owing to general mathematical model is the most abstract and cannot provide the information such as voltage, electric current in real time, therefore in the simulation of circuit, there is no the help obtaining essence, and most mathematical model also can be only used in specific application.
(3) circuit model: through the charge and discharge behavior of battery, utilize the mode of curve matching (Curve-fitting), the equivalent circuit built up, by the parameter of model, utilize the equivalent circuit that the circuit units such as voltage source, resistance and electric capacity are combined into, owing to the use more intuition of model and the information for voltage, electric current, electricity and time can be provided, therefore use frequently as simulation.
The method of existing simulated battery dynamic discharge is only used alone a kind of model therein, Qualitative and quantitative analysis is difficult to ensure that the accuracy of analog result.
Summary of the invention
Present invention is primarily targeted at method and the device of simulated battery dynamic discharge of the simulated battery dynamic discharge that a kind of circuit design providing analog information accurately to assist designer to complete to optimize is provided to circuit performance.
The present invention provides a kind of method of simulated battery dynamic discharge；It comprises the following steps:
Step 10: the parameter of pre-loaded test load electric current；
Step 20: the parameter of test load electric current is loaded onto diffusion method analysis model and estimates, after analyzing model calculating via diffusion method, draw battery SOC under this loading condition；
Step 30: utilize the SOC that estimation obtains, changes out the EMF corresponding with SOC, overvoltage internal resistance by search relationship table；
Step 40: calculate battery terminal voltage V by EMF, overvoltage internal resistance and load current value nowLoad。
Especially, the test load electric current in described step 10 is one section or the different electric current of multistage is constituted, and the parameter of test load electric current is set as the current value in each stage and the discharge time of this section of electric current.
Especially, step 50 is the most also included: be converted to V according to described dataLoadRelation with discharge time.
The present invention also provides for the device of a kind of simulated battery dynamic discharge；Comprising:
Input interface, it is for the parameter of pre-loaded test load electric current；
Internal memory, stores diffusion method and analyzes model in it；
Processing module, after it connects described input interface and internal memory, and described processing module receives the parameter of test load electric current and selects the battery types of assessment, trigger performing diffusion method and analyze model and estimate, after analyzing model calculating via diffusion method, obtain battery SOC under this loading condition；
Modular converter, it connects described processing module, and the SOC that described modular converter obtains according to estimation, changes out the EMF corresponding with SOC, overvoltage internal resistance by search relationship table；
Computing module, it connects described modular converter, and described computing module calculates battery terminal voltage V according to EMF, overvoltage internal resistance and load current value nowLoad。
Especially, described test load electric current is one section or the different electric current of multistage is constituted, and the parameter of test load electric current is set as the current value in each stage and the discharge time of this section of electric current.
Especially, described computing module is converted to V according to described dataLoadRelation with discharge time.
Compared with prior art, the present invention utilizes diffusion method to analyze model estimation and obtains SOC, circuit model is coordinated to be converted into the physical quantitys such as EMF, overvoltage internal resistance and discharge time, the physical quantity that simulation obtains can assist designer that circuit performance completes the circuit design optimized as reference during circuit design.
[accompanying drawing explanation]
Fig. 1 is the flow chart of the method for simulated battery dynamic discharge of the present invention.
Fig. 2 is the block diagram of the device of simulated battery dynamic discharge of the present invention.
[detailed description of the invention]
Referring to shown in Fig. 1, the present invention provides a kind of method of simulated battery dynamic discharge；It comprises the following steps:
Step 10: the parameter of pre-loaded test load electric current；In the present embodiment, test load electric current is one section or the different electric current of multistage is constituted, and the parameter of test load electric current is set as the current value in each stage and the discharge time of this section of electric current.
Step 20: the parameter of test load electric current is loaded onto diffusion method analysis model and estimates, after analyzing model calculating via diffusion method, draw battery SOC under this loading condition；Wherein, it is via the constant-current discharges organized and to discharge deadline that the optimal initial quantity of electricity of diffusion method analysis model and electricity reply parameter obtain more, estimates SOC with the use of minimal square error method.
Step 30: utilize the SOC that estimation obtains, changes out the EMF corresponding with SOC, overvoltage internal resistance by search relationship table；
Wherein, EMF (Electro-Motive-Force) refers to that battery passes through and produced potential difference under interior molecules poised state, namely terminal voltage during battery open circuit at no current.The EMF value of battery and the capacitance of battery have direct relation, via many group constant-current discharge experimental datas, set up the relation table of SOC Yu EMF, according to just counter pushing away the EMF that battery is current after the relation table of SOC lookup SOC Yu EMF.
Via many group constant-current discharge experimental datas, set up SOC and the relation table of overvoltage internal resistance (Rover-potential), according to just counter pushing away the overvoltage internal resistance that battery is current after the relation table of SOC lookup SOC and overvoltage internal resistance.
Step 40: calculate battery terminal voltage V by EMF, overvoltage internal resistance and load current value nowLoad。
Step 50: be converted to V according to described dataLoadRelation with discharge time.
Referring to shown in Fig. 2, the present invention also provides for the device of a kind of simulated battery dynamic discharge；Comprising:
Input interface 101, it is for the parameter of pre-loaded test load electric current；In the present embodiment, described test load electric current is one section or the different electric current of multistage is constituted, and the parameter of test load electric current is set as the current value in each stage and the discharge time of this section of electric current；
Internal memory 102, stores diffusion method and analyzes model in it；
Processing module 103, after it connects described input interface and internal memory, and described processing module receives the parameter of test load electric current and selects the battery types of assessment, trigger performing diffusion method and analyze model and estimate, after analyzing model calculating via diffusion method, obtain battery SOC under this loading condition；
Modular converter 104, it connects described processing module 103, and the SOC that described modular converter 104 obtains according to estimation, changes out the EMF corresponding with SOC, overvoltage internal resistance by search relationship table；
Computing module 105, it connects described modular converter 104, and described computing module 105 calculates battery terminal voltage V according to EMF, overvoltage internal resistance and load current value nowLoad；In the present embodiment, described computing module 105 also can be converted to V according to described dataLoadRelation with discharge time；
The present invention utilizes diffusion method to analyze model estimation and obtains SOC, circuit model is coordinated to be converted into the physical quantitys such as EMF, overvoltage internal resistance and discharge time, the physical quantity that simulation obtains can assist designer that circuit performance completes the circuit design optimized as reference during circuit design.
The above; being only the detailed description of the invention of the present invention, but protection scope of the present invention is not limited thereto, any those familiar with the art is in the technical scope that the invention discloses; change can be readily occurred in or replace, all should contain within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with scope of the claims.
Claims (6)
1. the method for a simulated battery dynamic discharge；It is characterized in that comprising the following steps:
Step 10: the parameter of pre-loaded test load electric current；
Step 20: the parameter of test load electric current is loaded onto diffusion method analysis model and estimates, after analyzing model calculating via diffusion method, draw battery SOC under this loading condition；
Step 30: utilize the SOC that estimation obtains, changes out the EMF corresponding with SOC, overvoltage internal resistance by search relationship table；
Step 40: calculate battery terminal voltage V by EMF, overvoltage internal resistance and load current value nowLoad。
The method of simulated battery dynamic discharge the most according to claim 1, it is characterized in that: the test load electric current in described step 10 is one section or the different electric current of multistage is constituted, and the parameter of test load electric current is set as the current value in each stage and the discharge time of this section of electric current.
The method of simulated battery dynamic discharge the most according to claim 2, it is characterised in that: the most also include step 50: be converted to V according to described dataLoadRelation with discharge time.
4. the device of a simulated battery dynamic discharge；It is characterized in that including:
Input interface, it is for the parameter of pre-loaded test load electric current；
Internal memory, stores diffusion method and analyzes model in it；
Processing module, after it connects described input interface and internal memory, and described processing module receives the parameter of test load electric current and selects the battery types of assessment, trigger performing diffusion method and analyze model and estimate, after analyzing model calculating via diffusion method, obtain battery SOC under this loading condition；
Modular converter, it connects described processing module, and the SOC that described modular converter obtains according to estimation, changes out the EMF corresponding with SOC, overvoltage internal resistance by search relationship table；
Computing module, it connects described modular converter, and described computing module calculates battery terminal voltage V according to EMF, overvoltage internal resistance and load current value nowLoad。
The device of simulated battery dynamic discharge the most according to claim 4, it is characterized in that: described test load electric current is one section or the different electric current of multistage is constituted, and the parameter of test load electric current is set as the current value in each stage and the discharge time of this section of electric current.
The device of simulated battery dynamic discharge the most according to claim 5, it is characterised in that: described computing module is converted to V according to described dataLoadRelation with discharge time.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US11205376B2 (en) | 2019-03-06 | 2021-12-21 | Boe Technology Group Co., Ltd. | Display compensation method, display compensation device, display device and storage medium |
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