CN110068739A - A kind of testing equipment and method for the research of energy storage dielectric charge-discharge characteristic - Google Patents

A kind of testing equipment and method for the research of energy storage dielectric charge-discharge characteristic Download PDF

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Publication number
CN110068739A
CN110068739A CN201910339653.5A CN201910339653A CN110068739A CN 110068739 A CN110068739 A CN 110068739A CN 201910339653 A CN201910339653 A CN 201910339653A CN 110068739 A CN110068739 A CN 110068739A
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China
Prior art keywords
energy storage
storage dielectric
voltage
discharge
sample
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CN201910339653.5A
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Chinese (zh)
Inventor
徐然
徐卓
冯玉军
魏晓勇
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Xi an Jiaotong University
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Xi an Jiaotong University
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Priority to CN201910339653.5A priority Critical patent/CN110068739A/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere

Abstract

The invention discloses a kind of testing equipments and method for the research of energy storage dielectric charge-discharge characteristic, including charge circuit, discharge loop and data collection system;The charge circuit includes high-voltage DC power supply; the high-voltage output end of high-voltage DC power supply is connected to one end of protective resistance; the other end of protective resistance is connected to the movable end A of high-voltage bidirectional switch; the fixing end C of high-voltage bidirectional switch is connected to one end of energy storage dielectric sample, and the other end of energy storage dielectric sample is connected with the ground terminal of high-voltage DC power supply;The discharge loop includes inductance, and one end of inductance is connected to the movable end B of high-voltage bidirectional switch, and the other end of inductance is connected to one end of resistance, and the other end of resistance is connected to the other end of energy storage dielectric sample by data collection system.The present invention can test charge-discharge characteristic of the energy storage dielectric substance under different voltages, different loads and different temperatures, can also test stability after certain number electric discharge.

Description

A kind of testing equipment and method for the research of energy storage dielectric charge-discharge characteristic
Technical field
The present invention relates to energy storage dielectric substance fields, and in particular to one kind is studied for energy storage dielectric charge-discharge characteristic Testing equipment and method.
Background technique
Energy storage dielectric substance high density capacitors, in terms of have important application.At present People generally use ferroelectric hysteresis loop or disruptive field intensity and dielectric constant to calculate its energy storage characteristic, and dielectric substance is typically in variation Under the slower electric field of rate.And energy storage dielectric substance is when being applied to the occasions such as high density capacitors, pulse-forming line, It needing to undergo relatively slow charging process and quick discharge process, the discharge process time can be as short as microsecond even nanosecond, Electric field change rate is quickly at this time.Traditional research method and energy storage dielectric real work situation are widely different, can not be anti- Reflect its performance in fast electric discharge, it is therefore necessary to study the dielectric charge-discharge characteristic of energy storage.At present do not have specifically for The test equipment and method of energy storage dielectric substance charge-discharge characteristic.
Summary of the invention
The purpose of the present invention is to provide it is a kind of for energy storage dielectric charge-discharge characteristic research testing equipment and method, Of the existing technology to solve the problems, such as, the present invention is directed to the demand of energy storage dielectric substance charge-discharge characteristic research, can survey Charge-discharge characteristic of the energy storage dielectric substance under different voltages, different loads and different temperatures is tried, can also be tested certain time Stability after number electric discharge.
To achieve the goals above, the present invention adopts the following technical scheme:
It is a kind of for energy storage dielectric charge-discharge characteristic research testing equipment, including charge circuit, discharge loop and Data collection system;
The charge circuit includes high-voltage DC power supply, protective resistance and high-voltage bidirectional switch, the height of high-voltage DC power supply Pressure output end is connected to one end of protective resistance, and the other end of protective resistance is connected to the movable end A of high-voltage bidirectional switch, high pressure The fixing end C of two-way switch is connected to one end of energy storage dielectric sample, the other end and high voltage direct current of energy storage dielectric sample The ground terminal of power supply is connected and is grounded;
The discharge loop includes inductance and resistance, and one end of inductance is connected to the movable end B of high-voltage bidirectional switch, inductance The other end be connected to one end of resistance, the other end of resistance is connected to the another of energy storage dielectric sample by data collection system The ground terminal of one end and high-voltage DC power supply.
Further, the data collection system include be connected to resistance the other end and energy storage dielectric sample it is another Current sensor between end is connected with data collector on current sensor.
Further, the current sensor is Rogowski coil.
Further, the data collector is oscillograph.
Further, the temperature control system for controlling its temperature is provided on the outside of energy storage dielectric sample.
A kind of test method for the research of energy storage dielectric charge-discharge characteristic, comprising the following steps:
Step 1: the fixing end C that high-voltage bidirectional switchs is connected to the movable end A of high-voltage bidirectional switch, passes through high straightening Galvanic electricity source is charged to energy storage dielectric sample, and the output valve by the way that high-voltage DC power supply is arranged charges to energy storage dielectric sample Given voltage value;
Step 2: when energy storage dielectric sample reaches given voltage value, the fixing end C that high-voltage bidirectional switchs is connected to The movable end B of high-voltage bidirectional switch, energy storage dielectric sample is by inductance and conductive discharge, when energy storage dielectric sample discharges, Discharge current waveform and data are captured by data collection system;
Step 3: the flash-over characteristic of energy storage dielectric sample is analyzed according to discharge current waveform.
Further, the data collection system include be connected to resistance the other end and energy storage dielectric sample it is another Current sensor between end is connected with data collector on current sensor and passes through first when energy storage dielectric sample discharges Current signal is converted to voltage signal by current sensor, then captures discharge current waveform and data by data collector.
Further, the temperature control system for controlling its temperature is provided on the outside of energy storage dielectric sample, it can Enough test the flash-over characteristic of energy storage dielectric sample under different temperatures.
Compared with prior art, the invention has the following beneficial technical effects:
The present invention is directed to the demand of energy storage dielectric substance charge-discharge characteristic research, can test energy storage dielectric substance and exist Charge-discharge characteristic under different voltages, different loads and different temperatures can also test stability after certain number electric discharge, The present invention is returned in the present invention by the high-voltage DC power supply short circuit when charge circuit accesses protective resistance, can prevent sample breakdown Road resistance, inductance are adjustable, and circuit can be made to be in and damped, and under underdamping and critical damping discharge condition, obtain various forms of Current waveform, present invention uses high-voltage bidirectional switches to reduce mutual shadow so that charging and discharging circuit is relatively independent It rings, test scope of the present invention is wide, by selecting component parameters, circuit parameter and data collection system appropriate, when electric discharge Between from sub-nanosecond range to second grade range, current peak is from 1A or less to up to hundred kilo-amperes, and voltage is from 1V or less to up to 100,000 Volt.
Further, the present invention can test the discharge current curves under different temperatures by the way that temperature control system is arranged.
The method of the present invention charges to energy storage dielectric sample by charge circuit, is situated between by discharge loop to energy storage electricity Quality sample is discharged, it can be achieved that the charge-discharge characteristic of multiple types dielectric substance is tested, and such as ferroelectricity/antiferroelectric ceramics, is gathered Close object film;It can realize that dielectric substance exists by control selections component parameters appropriate, circuit parameter and data collection system Flash-over characteristic test under various physical parameters, such as different voltages and different circuit parameters;It can also be controlled by setting temperature System tests the discharge current curves under different temperatures.
Detailed description of the invention
Fig. 1 is schematic diagram of the invention.
Fig. 2 is certain discharge current waveform of energy storage dielectric substance under room temperature and certain voltage.
In figure: 1- DC high-voltage power supply, 2- protective resistance, 3- high-voltage bidirectional switch, 4- energy storage dielectric sample, 5- electricity Sense, 6- resistance, 7- current sensor, 8- temperature control system, A, B, C are respectively three connectors of high-voltage bidirectional switch, wherein A It is movable end with B, C is fixing end.
Specific embodiment
Present invention is further described in detail with reference to the accompanying drawing:
Referring to Fig. 1, a kind of testing equipment for the research of energy storage dielectric charge-discharge characteristic, including charge circuit, electric discharge Circuit, data collection system and temperature control system, specific as follows:
Charge circuit includes high-voltage DC power supply 1, protective resistance 2, high-voltage bidirectional switch 3 and energy storage dielectric sample 4.With It charges in energy storage dielectric sample 4, charging voltage can be adjusted by setting 1 output valve of high-voltage DC power supply, and mesohigh is straight One end of the output end in galvanic electricity source 1+be connected to protective resistance 2, the other end of protective resistance 2 are connected to high-voltage bidirectional switch 3 Movable end A, the fixing end C of high-voltage bidirectional switch 3 are connected to one end of energy storage dielectric sample 4, energy storage dielectric sample 4 it is another One end is connected and is grounded with the cathode of high-voltage DC power supply 1.
Discharge loop includes energy storage dielectric sample 4, resistance 6, inductance 5, high-voltage bidirectional switch 3.For keeping energy storage electric Medium samples 4 is discharged, and can adjust discharge loop parameter by changing resistance 6 and inductance 5, wherein one end connection of inductance 5 is supreme The movable end B of two-way switch 3 is pressed, the other end of inductance 5 is connected to one end of resistance 6, and the other end of resistance 6 is acquired by data System is connected to the other end of energy storage dielectric sample 4.
Data collection system includes current sensor 7 (such as Rogowski coil) and data collector (such as oscillograph), is used for Capture the dielectric discharge current waveform of energy storage.
Temperature control box can be used in temperature control system 8, this part can choose to install, for controlling the temperature of energy storage dielectric sample 4, Also it can remove temperature control system 8, only test data at room temperature.
A kind of test method of energy storage dielectric charge-discharge characteristic research, comprising the following steps:
(1) at work, the temperature of energy storage dielectric sample 4 is set by temperature control system 8 first, also can remove temperature Control system 8 is spent, is only tested at room temperature.
(2) it is charged by DC high-voltage power supply 1 to energy storage dielectric sample 4, by the output that DC high-voltage power supply 1 is arranged Value makes energy storage dielectric sample 4 charge to given voltage value.
(3) when energy storage dielectric sample 4 reaches the charging voltage and temperature of setting, high-voltage bidirectional switch 3 is operated, makes to store up Can dielectric sample 4 be connected to discharge loop, discharged by resistance 6 and inductance 5, resistance 6 and inductance 5 include the intrinsic electricity of itself Hinder inductance and external load resistance-inductance;When energy storage dielectric sample 4 discharges, current signal is turned by current sensor 7 It is changed to voltage signal, discharge current waveform and data are captured by data collector such as oscillograph.
(4) flash-over characteristic that energy storage dielectric sample 4 is further analyzed according to discharge current waveform, such as discharge time, electricity Flow amplitude and discharge energy etc..
The invention will be described in further detail combined with specific embodiments below:
Embodiment 1
In compliance with the above technical solution, defeated as shown in Figure 1, DC high-voltage power supply 1 chooses 0-20kV adjustable DC high voltage power supply Positive polarity high voltage protective resistance 2 chooses 1M Ω high-tension resistive out, and high-voltage bidirectional switch 3 uses vacuum high-pressure relay, energy storage electricity It is solid for circuit itself that medium samples 4 chooses ceramic dielectric material, discharge loop direct short-circuit, therefore loop inductance 5 and resistance 6 There are resistance and inductance, do not use temperature control system, current sensor 7 uses Rogowski coil, and data collector uses oscillograph.
Specific implementation process is as follows:
It is connected first high-voltage bidirectional switch 3 fixing end C and movable end A when test, opens DC high-voltage power supply 1, setting To given voltage value V1, when energy storage dielectric sample 4 charges to V1, control 3 fixing end C of high-voltage bidirectional switch is connected to movably Hold B.
Energy storage dielectric sample 4 is discharged by discharge loop, and oscillograph captures discharge current waveform when charging voltage V1.
After electric discharge, high-voltage bidirectional switch 1 is made to return to movable end A, keep set temperature constant, resets charging electricity V2 is pressed, so that energy storage dielectric sample 4 is charged to voltage V2, so that two-way switch is in movable end B, when measuring charging voltage V2 Discharge current.
It repeats the above process, measures a series of charging voltage V1 at room temperature, the discharge current waveform under V2, V3 ....
Embodiment 2
In compliance with the above technical solution, defeated as shown in Figure 1, DC high-voltage power supply 1 chooses 0-20kV adjustable DC high voltage power supply Positive polarity high pressure out, protective resistance 2 choose 1M Ω high-tension resistive, and high-voltage bidirectional switch 3 uses vacuum high-pressure relay, energy storage electricity It is solid for circuit itself that medium samples 4 chooses ceramic dielectric material, discharge loop direct short-circuit, therefore loop inductance 5 and resistance 6 There are resistance and inductance, temperature control system 8 uses program-controlled incubator, and the merging of energy storage dielectric sample 4 wherein and by conducting wire is drawn Out outside program-controlled incubator, current sensor 7 uses Rogowski coil, and data collector uses oscillograph.
Specific implementation process is as follows:
Pass through temperature control system 8 when test first and sets work temperature 1.3 fixing end C of high-voltage bidirectional switch and movable A conducting is held, DC high-voltage power supply 1 is opened, setting to given voltage value V0 is controlled when energy storage dielectric sample 4 charges to V0 The fixing end C of high-voltage bidirectional switch 3 is connected with movable end B.
Energy storage dielectric sample 4 is discharged by discharge loop, and oscillograph captures discharge current waveform when charging voltage V0.
After electric discharge, high-voltage bidirectional switch 3 is made to return to movable end A, setting 4 temperature of energy storage dielectric sample to T2 is protected It is constant to hold charging voltage V0, makes the electricity of energy storage dielectric sample 4 to voltage V0, so that two-way switch is in movable end B, measure temperature Discharge current when degree T2, charging voltage V0.
It repeats the above process, measures series of temperature T1, the discharge current waveform under T2, T3 ....
Embodiment 3
In compliance with the above technical solution, defeated as shown in Figure 1, DC high-voltage power supply 1 chooses 0-20kV adjustable DC high voltage power supply Positive polarity high pressure out, protective resistance 2 choose 1M Ω high-tension resistive, and high-voltage bidirectional switch 3 uses vacuum high-pressure relay, energy storage electricity It is solid for circuit itself that medium samples 4 chooses ceramic dielectric material, discharge loop direct short-circuit, therefore loop inductance 5 and resistance 6 There are resistance and inductance, temperature control system 8 uses program-controlled incubator, and the merging of energy storage dielectric sample 4 wherein and by conducting wire is drawn Out outside program-controlled incubator, current sensor 7 uses Rogowski coil, and data collector uses oscillograph.
Specific implementation process is as follows:
Pass through temperature control system 8 when test first and sets work temperature 0.The fixing end C of high-voltage bidirectional switch 3 and can Moved end A contact, opens DC high-voltage power supply 1, and setting to given voltage value V0 is controlled when energy storage dielectric sample 4 charges to V0 3 fixing end C of high-voltage bidirectional switch processed is connected to movable end B.
Energy storage dielectric sample 4 is discharged by discharge loop, and oscillograph captures temperature T0, electric discharge electricity when charging voltage V0 Flow waveform.
It repeats the above process, the discharge current of energy storage dielectric sample 4, grinds when testing different charge and discharge numbers 1,2,3 ... Study carefully its stability.

Claims (8)

1. a kind of testing equipment for the research of energy storage dielectric charge-discharge characteristic, which is characterized in that including charge circuit, electric discharge Circuit and data collection system;
The charge circuit includes high-voltage DC power supply (1), protective resistance (2) and high-voltage bidirectional switch (3), high-voltage DC power supply (1) high-voltage output end is connected to one end of protective resistance (2), and the other end of protective resistance (2) is connected to high-voltage bidirectional switch (3) the fixing end C of movable end A, high-voltage bidirectional switch (3) are connected to one end of energy storage dielectric sample (4), energy storage dielectric The other end of sample (4) is connected and is grounded with the ground terminal of high-voltage DC power supply (1);
The discharge loop includes inductance (5) and resistance (6), and one end of inductance (5) is connected to the movable of high-voltage bidirectional switch (3) B is held, the other end of inductance (5) is connected to one end of resistance (6), and the other end of resistance (6) is connected to by data collection system The other end of energy storage dielectric sample (4) and the ground terminal of high-voltage DC power supply (1).
2. a kind of testing equipment for the research of energy storage dielectric charge-discharge characteristic according to claim 1, feature exist In the data collection system includes being connected between the other end of resistance (6) and the other end of energy storage dielectric sample (4) Current sensor (7), current sensor are connected with data collector on (7).
3. a kind of testing equipment for the research of energy storage dielectric charge-discharge characteristic according to claim 2, feature exist In the current sensor is Rogowski coil.
4. a kind of testing equipment for the research of energy storage dielectric charge-discharge characteristic according to claim 2, feature exist In the data collector is oscillograph.
5. a kind of testing equipment for the research of energy storage dielectric charge-discharge characteristic according to claim 1, feature exist In being provided with the temperature control system (8) for controlling its temperature on the outside of energy storage dielectric sample (4).
6. a kind of test method for the research of energy storage dielectric charge-discharge characteristic, is used for using one kind described in claim 1 The testing equipment of energy storage dielectric charge-discharge characteristic research, which comprises the following steps:
Step 1: the fixing end C of high-voltage bidirectional switch (3) is connected to the movable end A of high-voltage bidirectional switch (3), passes through high pressure DC power supply (1) charges to energy storage dielectric sample (4), and the output valve by the way that high-voltage DC power supply (1) is arranged makes energy storage electricity be situated between Quality sample (4) charges to given voltage value;
Step 2: when energy storage dielectric sample (4) reaches given voltage value, by the fixing end C connection of high-voltage bidirectional switch (3) To the movable end B of high pressure two-way switch (3), energy storage dielectric sample (4) is discharged by inductance (5) and resistance (6), and energy storage electricity is situated between When quality sample (4) discharges, discharge current waveform and data are captured by data collection system;
Step 3: the flash-over characteristic of energy storage dielectric sample (4) is analyzed according to discharge current waveform.
7. a kind of test method for the research of energy storage dielectric charge-discharge characteristic according to claim 6, feature exist In the data collection system includes being connected between the other end of resistance (6) and the other end of energy storage dielectric sample (4) Current sensor (7) is connected with data collector on current sensor (7), logical first when energy storage dielectric sample (4) discharges Current signal is converted to voltage signal by over-current sensor (7), then by data collector capture discharge current waveform and Data.
8. a kind of test method for the research of energy storage dielectric charge-discharge characteristic according to claim 6, feature exist In being provided with the temperature control system (8) for controlling its temperature on the outside of energy storage dielectric sample (4), can test not The flash-over characteristic of synthermal lower energy storage dielectric sample (4).
CN201910339653.5A 2019-04-25 2019-04-25 A kind of testing equipment and method for the research of energy storage dielectric charge-discharge characteristic Pending CN110068739A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111398709A (en) * 2020-03-20 2020-07-10 中国科学院上海硅酸盐研究所 Method for testing energy storage density of energy storage capacitor

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4785372A (en) * 1984-03-26 1988-11-15 Canon Kabushiki Kaisha Method and device for charging or discharging member
JPH0613898A (en) * 1992-06-29 1994-01-21 Nec Corp Frequency synthesizer
CN201867457U (en) * 2010-10-30 2011-06-15 安徽铜峰电子股份有限公司 Capacitor charging and discharging test instrument
CN202041590U (en) * 2010-12-31 2011-11-16 珠海格力新元电子有限公司 Capacitor charge and discharge tester
CN102841123A (en) * 2012-09-04 2012-12-26 西安交通大学 Measuring device and measuring method for trap parameter of solid dielectric material
CN202994915U (en) * 2012-11-07 2013-06-12 沈阳创达技术交易市场有限公司 Super-capacitor discharge curve acquisition device
CN105988085A (en) * 2015-02-06 2016-10-05 国家电网公司 Health state assessment method of retired electric automobile power cell
CN107516750A (en) * 2017-08-03 2017-12-26 国联汽车动力电池研究院有限责任公司 A kind of method and device for determining lithium ion battery safe charging condition

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4785372A (en) * 1984-03-26 1988-11-15 Canon Kabushiki Kaisha Method and device for charging or discharging member
JPH0613898A (en) * 1992-06-29 1994-01-21 Nec Corp Frequency synthesizer
CN201867457U (en) * 2010-10-30 2011-06-15 安徽铜峰电子股份有限公司 Capacitor charging and discharging test instrument
CN202041590U (en) * 2010-12-31 2011-11-16 珠海格力新元电子有限公司 Capacitor charge and discharge tester
CN102841123A (en) * 2012-09-04 2012-12-26 西安交通大学 Measuring device and measuring method for trap parameter of solid dielectric material
CN202994915U (en) * 2012-11-07 2013-06-12 沈阳创达技术交易市场有限公司 Super-capacitor discharge curve acquisition device
CN105988085A (en) * 2015-02-06 2016-10-05 国家电网公司 Health state assessment method of retired electric automobile power cell
CN107516750A (en) * 2017-08-03 2017-12-26 国联汽车动力电池研究院有限责任公司 A kind of method and device for determining lithium ion battery safe charging condition

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
毛新红等: "《高电压技术》", 30 June 2016 *
黎畅: ""高储能密度玻璃陶瓷复合材料的充放电性能研究"", 《中国优秀硕士学位论文全文数据库(工程科技I辑)》 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111398709A (en) * 2020-03-20 2020-07-10 中国科学院上海硅酸盐研究所 Method for testing energy storage density of energy storage capacitor

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