CN108152617A - Measure the method, apparatus and terminal device of electrothermal module peak power output - Google Patents
Measure the method, apparatus and terminal device of electrothermal module peak power output Download PDFInfo
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Abstract
The present invention is suitable for technical field of thermoelectric conversion, provide a kind of method for measuring electrothermal module peak power output, device and terminal device, according to the variation range of electrothermal module output current, and the variation relation of the output current of the hot junction input thermal energy and electrothermal module of electrothermal module, determine the variation range of hot junction input thermal energy, and then determine the variation range of thermoelectric material mean temperature and the variation range of dynamic internal resistance, in the variation range of dynamic internal resistance, gradually adjust the resistance value of test resistance, and measure the output power of electrothermal module under each test resistance resistance value, determine the peak power output of electrothermal module, reduce the adjustable range of test resistance, measurement process is simple and convenient, save the plenty of time.
Description
Technical field
The invention belongs to technical field of thermoelectric conversion more particularly to a kind of sides for measuring electrothermal module peak power output
Method, device and terminal device.
Background technology
Semiconductor temperature differential generating mainly converts heat energy into electric energy using semi-conductor thermoelectric material Seebeck effect.Thermoelectricity mould
The core component that block (Thermo electric Module, TEM) is converted as thermal energy to electric energy, peak power output are characterizations
One of major parameter of its heat to electricity conversion performance.At present, peak power output under the certain temperature difference of electrothermal module hot and cold side is obtained
There are three types of common methods：1. open-circuit voltage-short circuit current method；2. volt-ampere characteristic method；3. load matched method.
But open-circuit voltage-short circuit current method and volt-ampere characteristic method are all to calculate the maximum defeated of electrothermal module with theoretical value
Go out power, do not consider in electrothermal module there are coupled thermomechanics effect, therefore, the electrothermal module being calculated by classical theory is most
Big output power accuracy is relatively low.Load matched method is the classical measurement method of electrothermal module peak power output, based on thermoelectricity mould
The cold and hot both ends of block adjust load resistance value, find load resistance and electrothermal module internal resistance actual match operating mode, root under certain temperature difference
According to the voltage (V of electrothermal module output terminal measured under matching operating modeo), electric current (Io) that electrothermal module maximum is calculated is defeated
Go out power (Pomax=VoIo), since the measuring method simulates electrothermal module actual condition completely, therefore obtained electrothermal module is most
Big output power value is more accurate, but the measuring method needs load value change, and can not determine load value tune one by one
Whether adjusting range covers the corresponding internal resistance value of hot spot module peak power output under the specified temperature difference, and when measurement is required to hot and cold side temperature
Difference, voltage/current output enter stable state, and therefore, measurement process is complicated, to take long be that current load matched method measures heat
It is insufficient existing for electric module peak power output.
Invention content
In view of this, an embodiment of the present invention provides it is a kind of measure electrothermal module peak power output method, apparatus and
Terminal device, to solve to measure electrothermal module peak power output using load matched method in the prior art, measurement process is complicated,
Take the problem of long.
First aspect of the embodiment of the present invention provides a kind of method for measuring electrothermal module peak power output, including following
Step：
The variation range of the output current of electrothermal module is obtained, according to the variation range and thermoelectricity of the output current
The variation relation of the hot junction input thermal energy of module and the output current of electrothermal module determines the variation model of the hot junction input thermal energy
It encloses.
The variation range of thermal energy and the thermoelectricity material of hot junction input thermal energy and electrothermal module are inputted according to the hot junction
Expect the variation relation of mean temperature, determine the variation range of the thermoelectric material mean temperature.
According to the variation range of the thermoelectric material mean temperature and thermoelectric material conductivity and the average temperature of thermoelectric material
The variation relation of the dynamic internal resistance of the variation relation of degree, thermoelectric material conductivity and electrothermal module determines the dynamic internal resistance
Variation range.
In the variation range of the dynamic internal resistance, the resistance value of the external test resistance of electrothermal module is gradually adjusted, and is surveyed
Measure the output power of electrothermal module under each test resistance resistance value.
According to the output power of the electrothermal module of measurement, the peak power output of electrothermal module is determined.
Further, the method for measuring electrothermal module peak power output further includes：
According to the variation range of the dynamic internal resistance, determine in the average dynamic in the variation range of the dynamic internal resistance
Resistance.
The initial resistance value for adjusting the external test resistance of electrothermal module is equal to the average dynamic internal resistance.
Further, the variation relation of the output current of the hot junction input thermal energy and electrothermal module of the electrothermal module is：
Wherein, parameter A=Rh-(1-η)Rc, parameter B=
1-0.5η+K[Rh+(1-η)Rc], Tc、ThRespectively electrothermal module cool and heat ends temperature, QhHot junction for electrothermal module inputs thermal energy,
η is the conversion efficiency of thermoelectric of electrothermal module, and N is the P-N galvanic couple logarithms in electrothermal module, and α is the Seebeck coefficient of electrothermal module,
K is the thermal conductivity factor of electrothermal module, and I is the output current of electrothermal module.
The hot junction input thermal energy and the variation relation of the thermoelectric material mean temperature are：
Wherein, parameter A
=Rh-(1-η)Rc, TjFor the mean temperature of thermoelectric material, Tc、ThRespectively electrothermal module cool and heat ends temperature, Tcj、ThjRespectively
The cool and heat ends junction temperature of thermoelectric material, QhHot junction for electrothermal module inputs thermal energy, Rc、RhRespectively electrothermal module is hot and cold
Dead resistance is held, η is the conversion efficiency of thermoelectric of electrothermal module.
The variation relation of the thermoelectric material conductivity and the thermoelectric material mean temperature is：
Wherein, σn、σpThe respectively N-type of electrothermal module, the conductivity of p-type thermoelectric material, TjFor the average temperature of thermoelectric material
Degree.
The thermoelectric material conductivity and the variation relation of the dynamic internal resistance are：
Wherein, N be electrothermal module in P-N galvanic couple logarithms, hn、hpRespectively electrothermal module
N-type, the arm of p-type thermoelectric material it is high, ln、lpThe respectively N-type of electrothermal module, the p-type thermoelectric material cross section length of side, σn、σpPoint
Not Wei the N-type of electrothermal module, p-type thermoelectric material in mean temperature TjUnder conductivity, RiIt is electrothermal module in mean temperature TjUnder
Dynamic internal resistance.
Further, it is described in the variation range of the dynamic internal resistance, gradually adjust the external test electricity of electrothermal module
The resistance value of resistance, and the output power for measuring electrothermal module under each test resistance resistance value includes：
In the variation range of the dynamic internal resistance, determine that the initial of the test resistance adjusts direction.
On the initial adjusting direction, the resistance value of the test resistance is gradually adjusted, and measures each test resistance resistance
The output power of the lower electrothermal module of value.
When reduction trend occurs in the output power of the electrothermal module of measurement, in the initial opposite direction for adjusting direction
On, the resistance value of the test resistance is gradually adjusted, and measure the output power of electrothermal module under each test resistance resistance value.
Further, the output power of the electrothermal module according to measurement determines the peak power output packet of electrothermal module
It includes：
According to the output power of the electrothermal module of measurement, the peak value of the output power of electrothermal module is determined.
According to the peak value of the output power of electrothermal module, the peak power output of electrothermal module is determined.
Second aspect of the embodiment of the present invention provides a kind of device for measuring electrothermal module peak power output, including：
First variation range determining module, for obtaining the variation range of the output current of electrothermal module, according to described defeated
Go out the variation range of electric current and the hot junction input thermal energy of electrothermal module and the variation relation of the output current, determine described
Hot junction inputs the variation range of thermal energy；
Second variation range determining module, for inputting the variation range of thermal energy and the hot junction according to the hot junction
The variation relation of the thermoelectric material mean temperature of thermal energy and electrothermal module is inputted, determines the variation of the thermoelectric material mean temperature
Range；
Third variation range determining module, for the variation range and thermoelectricity according to the thermoelectric material mean temperature
Material electric conductivity and the variation relation of thermoelectric material mean temperature, the change of the dynamic internal resistance of thermoelectric material conductivity and electrothermal module
Change relationship determines the variation range of the dynamic internal resistance；
Output power measurement module, in the variation range of the dynamic internal resistance, gradually adjusting the outer of electrothermal module
The resistance value of test resistance is connect, and measures the output power of electrothermal module under each test resistance resistance value；
Peak power output determining module for the output power of the electrothermal module according to measurement, determines electrothermal module
Peak power output.
Further, the device for measuring electrothermal module peak power output further includes：
Average dynamic internal resistance determining module for the variation range according to the dynamic internal resistance, determines the dynamic internal resistance
Variation range in average dynamic internal resistance；
Initial resistance value adjustment module, for adjusting the initial resistance value of the test resistance equal to the average dynamic internal resistance.
Further, the output power measurement module includes：
It is initial to adjust direction determining mould, in the variation range of the dynamic internal resistance, determining the test resistance
Initial adjust direction；
First output power measurement module, for it is described it is initial adjusting direction, gradually adjust the test resistance
Resistance value, and measure the output power of electrothermal module under each test resistance resistance value；
Second output power measurement module, for when there is reduction trend in the output power of the electrothermal module of measurement,
In the initial opposite direction for adjusting direction, the resistance value of the test resistance is gradually adjusted, and measures each test resistance resistance
The output power of the lower electrothermal module of value.
The third aspect of the embodiment of the present invention provides a kind of terminal device for measuring electrothermal module peak power output, including
Memory, processor and it is stored in the computer program that can be run in the memory and on the processor, feature
It is, the processor realizes the measurement electrothermal module of above-described embodiment first aspect offer most when performing the computer program
The method of big output power.
The fourth aspect of the embodiment of the present invention provides a kind of computer readable storage medium, the computer-readable storage
Media storage has computer program, and the computer program realizes what above-described embodiment first aspect provided when being executed by processor
The method for measuring electrothermal module peak power output.
Existing advantageous effect is the embodiment of the present invention compared with prior art：A kind of measurement thermoelectricity mould provided by the invention
The method, apparatus and terminal device of block peak power output, according to the variation range of electrothermal module output current and thermoelectricity mould
The variation relation of the hot junction input thermal energy of block and the output current of electrothermal module determines the variation range of hot junction input thermal energy, into
And determine the variation range of thermoelectric material mean temperature and the variation range of dynamic internal resistance, in the variation range of dynamic internal resistance,
The resistance value of test resistance is gradually adjusted, and measures the output power of electrothermal module under each test resistance resistance value, determines thermoelectricity mould
The peak power output of block reduces the adjustable range of test resistance, and measurement process is simple and convenient, saves the plenty of time.
Description of the drawings
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description be only the present invention some
Embodiment, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is a kind of flow signal of method for measuring electrothermal module peak power output provided in an embodiment of the present invention
Figure；
Fig. 2 is thermoelectric material provided in an embodiment of the present invention and the change curve of temperature；
Fig. 3 is a kind of schematic frame of device for measuring electrothermal module peak power output provided in an embodiment of the present invention
Figure；
Fig. 4 is that a kind of structure of terminal device for measuring electrothermal module peak power output provided in an embodiment of the present invention is shown
It is intended to.
Specific embodiment
In order to which technical problems, technical solutions and advantages to be solved are more clearly understood, tie below
Accompanying drawings and embodiments are closed, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only
To explain the present invention, it is not intended to limit the present invention.
In order to illustrate technical scheme of the present invention, illustrated below by specific embodiment.
Refering to Fig. 1, an embodiment of the present invention provides a kind of method for measuring electrothermal module peak power output, including following
Step：
S101 obtains the variation range of the output current of electrothermal module, according to the variation range of the output current and
The hot junction input thermal energy of electrothermal module and the variation relation of the output current determine the variation model of the hot junction input thermal energy
It encloses.
Specifically, under the operating mode of electrothermal module output open circuit, open-circuit current Ioc, output current minimum I=Ioc=0,
Under the operating mode of electrothermal module output short-circuit, short circuit current Isc, output current maximum I=Isc, therefore, the change of output current
It is 0~I to change rangesc。
If electrothermal module cool and heat ends temperature is respectively Tc、Th；The hot and cold junction temperature of thermoelectric material is respectively Tcj、Thj,
Electrothermal module cool and heat ends thermal energy is respectively Qc、Qh；The temperature difference of electrothermal module is Δ Tj, thermoelectric material mean temperature is Tj, thermoelectricity
Module cool and heat ends dead resistance is respectively Rh、Rc, the output power of electrothermal module is Po, the conversion efficiency of thermoelectric of electrothermal module is
η, the thermal conductivity factor of electrothermal module is K, and the Seebeck coefficient of electrothermal module is α, and the dynamic internal resistance of electrothermal module is Ri, thermoelectricity mould
The output current of block is I, test resistance RL, then：
Thj=Th-QhRh, Tcj=Tc+QcRc
Thj+Tcj=(Th+Tc)-QhRh+QcRc=(Th+Tc)-QhRh+(Qh-Po)Rc
=(Th+Tc)-QhRh+Qh(1-η)Rc=(Th+Tc)-[Rh-(1-η)Rc]Qh
ΔTj=Thj-Tcj=(Th-Tc)-QhRh-QcRc=(Th-Tc)-QhRh-(1-η)QhRc
=(Th-Tc)-[Rh+(1-η)Rc]Qh
Enable parameter A=Rh-(1-η)Rc, Thj+Tcj=(Th+Tc)-AQh
Qh=N α IThj+K(Thj-Tcj)-0.5I2Ri=N α IThj+KΔTj-0.5I(NαΔTj-IRL)
=N α IThj-0.5NαIΔTj+KΔTj+0.5I2RL=0.5N α I (Thj+Tcj)+KΔTj+0.5I2RL
=0.5N α I (Thj+Tcj)+KΔTj+0.5Po
=0.5N α I (Thj+Tcj)+KΔTj+0.5ηQh
=0.5N α I (Th+Tc)-0.5NαIAQh+K{(Th-Tc)-[Rh+(1-η)Rc]Qh}+0.5ηQh
{1-0.5η+K[Rh+(1-η)Rc]+0.5NAαI}Qh=0.5N α (Th+Tc)I+K(Th-Tc)
Enable parameter B=1-0.5 η+K [Rh+(1-η)Rc]
In above formula, A=Rh-(1-η)Rc>0, and
B(Th+Tc)-K(Th-Tc) A={ 1-0.5 η+K [Rh+(1-η)Rc]}(Th+Tc)-K(Th-Tc)[Rh-(1-η)Rc]
=(1-0.5 η) (Th+Tc)+KRhTh+KRhTc+K(1-η)RcTh+K(1-η)RcTc-KRh
Th+KRhTc
+K(1-η)RcTh-K(1-η)RcTc
=(1-0.5 η) (Th+Tc)+2K[RhTc+(1-η)RcTh]>0
Therefore, in the cold junction temperature T of electrothermal modulecWith hot-side temperature ThOne timing, the hot junction input heat needed for electrothermal module
It can QhIt is related with the output current I of electrothermal module, and hot junction input thermal energy QhIncrease with the increase of output current I.
Under the operating mode of electrothermal module output open circuit, open-circuit current Ioc, output current I=Ioc=0, output is electric at this time
It flows for minimum value, hot junction input thermal energy is also minimized, i.e. Qh=Qhmin。
Under the operating mode of electrothermal module output short-circuit, short circuit current Isc, output current I=Isc, at this time output current be
Maximum value, hot junction input thermal energy are also maximized, i.e. Qh=Qhmax。
Under the operating mode of electrothermal module output power maximum, output current I is in 0~IscBetween, about 0.5Isc, it is defeated at this time
Enter thermal energy QhMeet Qhmin<Qh<Qhmax, in this way, the output current of thermal energy and electrothermal module is inputted according to the hot junction of electrothermal module
Variation relation determines that the variation range of hot junction input thermal energy.
S102 inputs the variation range of thermal energy and hot junction input thermal energy and electrothermal module according to the hot junction
The variation relation of thermoelectric material mean temperature determines the variation range of the thermoelectric material mean temperature.
Specifically, the mean temperature of thermoelectric material meets：
I.e. thermoelectric material mean temperature is reduced with the increase of hot junction input thermal energy.
Input thermal energy Q is obtained in step S101hRange be Qhmin<Qh<Qhmax, with reference to above-mentioned hot junction input thermal energy with
The variation relation of the thermoelectric material mean temperature is understood：
Under the operating mode of electrothermal module output open circuit, open-circuit current Ioc, output current I=Ioc=0, output is electric at this time
It flows for minimum value, hot junction input thermal energy is also minimized, i.e. Qh=Qhmin, and thermoelectric material mean temperature TjFor maximum value, it is set as
Tjmax。
Under the operating mode of electrothermal module output short-circuit, short circuit current Isc, output current I=Isc, at this time output current be
Maximum value, hot junction input thermal energy are also maximized, i.e. Qh=Qhmax, and thermoelectric material mean temperature TjFor minimum value, it is set as
Tjmin。
Hence, it can be determined that the variation range of thermoelectric material mean temperature is Tjmin<Tj<Tjmax。
S103, according to the variation range of the thermoelectric material mean temperature and thermoelectric material conductivity and thermoelectric material
The variation relation of the dynamic internal resistance of the variation relation of mean temperature, thermoelectric material conductivity and electrothermal module, determines the dynamic
The variation range of internal resistance.
Specifically, the conductivity of thermoelectric material and the variation characteristic of temperature are as shown in Figure 2, it can be seen that no matter semiconductor heat
For electric material for generating electricity or freezing, the mean temperature of conductivity and material is in the conductivity of inverse change, i.e. thermoelectric material
Increase with the reduction of thermoelectric material mean temperature.
By taking another specific thermoelectric material as an example, the variation relation of conductivity and temperature meets：
Wherein, σn、σpThe respectively N-type of electrothermal module, the conductivity of p-type thermoelectric material, TjFor the average temperature of thermoelectric material
Degree.
Meet between thermoelectric material conductivity and electrothermal module dynamic internal resistance：Wherein, N is heat
Electric mould P-N galvanic couples logarithm in the block, hn、hpRespectively the N-type of electrothermal module, the arm of p-type thermoelectric material are high, ln、lpIt is respectively hot
N-type, the p-type thermoelectric material cross section length of side of electric module, σn、σpRespectively the N-type of electrothermal module, p-type thermoelectric material are in average temperature
Spend TjUnder conductivity, RiIt is electrothermal module in mean temperature TjUnder dynamic internal resistance.
By above-mentioned analysis, it is not difficult to show that the internal resistance of electrothermal module dynamic reduces with the increase of thermoelectric material conductivity, into
And it understands dynamic internal resistance and reduces with the reduction of thermoelectric material mean temperature.
Therefore, under the operating mode of electrothermal module output open circuit, thermoelectric material mean temperature TjFor maximum of Tjmax, it is right at this time
The dynamic internal resistance answered is maximum value, is set as Rioc。
Under the operating mode of electrothermal module output short-circuit, thermoelectric material mean temperature TjFor minimum value Tjmin, it is corresponding at this time dynamic
State internal resistance is minimum value, is set as Risc。
For electrothermal module stable state road open circuit, it is assumed that stable state open-circuit voltage is Voc1, instantaneous short circuit electric current be Isc1, due to
Electrothermal module change of temperature field lags behind electrothermal module electric field change, as data sampling time≤30ms, reads electrothermal module wink
Between short circuit current Isc1When, it is believed that electrothermal module temperature field approximation does not change, therefore,
Similarly for electrothermal module steady-state short-circuit operating mode, it is assumed that steady-state shortcircuit current Isc2, moment open-circuit voltage be Voc2,
The then corresponding electrothermal module dynamic internal resistance of such operating mode
It is respectively T in the cool and heat ends temperature of electrothermal modulec、ThWhen, dynamic internal resistance RiMeet：Risc<Ri<Rioc。
S104 in the variation range of the dynamic internal resistance, gradually adjusts the resistance value of the test resistance, and measures each
The output power of electrothermal module under test resistance resistance value.
Specifically, when the resistance value of test resistance is equal with dynamic internal resistance, the output power of electrothermal module is maximum, known
In the case of the variation range of dynamic internal resistance, the resistance value of test resistance need to be only adjusted in the variation range, and is measured each
The output power of the corresponding electrothermal module of a test resistance resistance value.
S105 according to the output power of the electrothermal module of measurement, determines the peak power output of electrothermal module.
Specifically, from measuring in obtained electrothermal module output power, it can be found that output power is there are peak value, and thus
It can determine the peak power output of electrothermal module.
A kind of method, apparatus and terminal device for measuring electrothermal module peak power output provided in an embodiment of the present invention,
The output current of thermal energy and electrothermal module is inputted according to the hot junction of the variation range of electrothermal module output current and electrothermal module
Variation relation, determine the variation range of hot junction input thermal energy, and then determine the variation range of thermoelectric material mean temperature
With the variation range of dynamic internal resistance, in the variation range of dynamic internal resistance, the resistance value of test resistance is gradually adjusted, and measure each
The output power of electrothermal module under test resistance resistance value, determines the peak power output of electrothermal module, reduces test resistance
Adjustable range, measurement process is simple and convenient, saves the plenty of time.
Further, the method for measuring electrothermal module peak power output further includes：
According to the variation range of the dynamic internal resistance, determine in the average dynamic in the variation range of the dynamic internal resistance
Resistance.
The initial resistance value for adjusting the test resistance is equal to the average dynamic internal resistance.
Specifically, it is R in the variation range of known dynamic internal resistanceisc<Ri<RiocWhen, it can be according to Ri-mean=(Rioc+
RiscThe determining average dynamic internal resistance in)/2, using average dynamic internal resistance as the initial resistance value of test resistance, from energy input angle point
Analysis, average dynamic internal resistance is closer to the dynamic internal resistance under peak power output operating mode, by the resistance value for finely tuning test resistance, you can
The operating mode of Rapid matching electrothermal module output power maximum, and measurement obtains the maximum of electrothermal module at a temperature of corresponding cool and heat ends
Output power greatly reduces time of measuring.
Further, the variation relation of the output current of the hot junction input thermal energy and electrothermal module of the electrothermal module is：
Wherein, parameter A=Rh-(1-η)Rc, parameter B=
1-0.5η+K[Rh+(1-η)Rc], Tc、ThRespectively electrothermal module cool and heat ends temperature, QhHot junction for electrothermal module inputs thermal energy,
η is the conversion efficiency of thermoelectric of electrothermal module, and N is the P-N galvanic couple logarithms in electrothermal module, and α is the Seebeck coefficient of electrothermal module,
K is the thermal conductivity factor of electrothermal module, and I is the output current of electrothermal module.
The hot junction input thermal energy and the variation relation of the thermoelectric material mean temperature are：
Wherein, parameter A
=Rh-(1-η)Rc, TjFor the mean temperature of thermoelectric material, Tc、ThRespectively electrothermal module cool and heat ends temperature, Tcj、ThjRespectively
The cool and heat ends junction temperature of thermoelectric material, QhHot junction for electrothermal module inputs thermal energy, Rc、RhRespectively electrothermal module is hot and cold
Dead resistance is held, η is the conversion efficiency of thermoelectric of electrothermal module.
The variation relation of the thermoelectric material conductivity and the thermoelectric material mean temperature is：
Wherein, σn、σpThe respectively N-type of electrothermal module, the conductivity of p-type thermoelectric material, TjFor the average temperature of thermoelectric material
Degree.
The thermoelectric material conductivity and the variation relation of the dynamic internal resistance are：
Wherein, N be electrothermal module in P-N galvanic couple logarithms, hn、hpRespectively electrothermal module
N-type, the arm of p-type thermoelectric material it is high, ln、lpThe respectively N-type of electrothermal module, the p-type thermoelectric material cross section length of side, σn、σpPoint
Not Wei the N-type of electrothermal module, p-type thermoelectric material in mean temperature TjUnder conductivity, RiIt is electrothermal module in mean temperature TjUnder
Dynamic internal resistance.
Further, it is described in the variation range of the dynamic internal resistance, gradually adjust the external test electricity of electrothermal module
The resistance value of resistance, and the output power for measuring electrothermal module under each test resistance resistance value includes：
In the variation range of the dynamic internal resistance, determine that the initial of the test resistance adjusts direction；
On the initial adjusting direction, the resistance value of the test resistance is gradually adjusted, and measures each test resistance resistance
The output power of the lower electrothermal module of value；
When reduction trend occurs in the output power of the electrothermal module of measurement, in the initial opposite direction for adjusting direction
On, the resistance value of the test resistance is gradually adjusted, and measure the output power of electrothermal module under each test resistance resistance value.
Specifically, in the range of the change in resistance of dynamic internal resistance, the initial resistance value of test resistance and initial adjusting side are determined
To the initial direction for adjusting direction and being increased or reduced for the resistance value of test resistance here can gradually be adjusted with certain difference
The resistance value of test resistance is saved, measures the output power under each test resistance resistance value, when there is reduction trend in output power, table
The resistance value of bright test resistance has had deviated from the corresponding dynamic internal resistance of peak power output, at this point, should adjust in the opposite direction
The resistance value of test resistance is saved, and measures the output power of electrothermal module.
Further, the output power of the electrothermal module according to measurement determines the peak power output packet of electrothermal module
It includes：
According to the output power of the electrothermal module of measurement, the peak value of the output power of electrothermal module is determined；
According to the peak value of the output power of electrothermal module, the peak power output of electrothermal module is determined.
Specifically, the situation of first increases and then decreases is presented with the increase of output current for the output power of electrothermal module, similarly,
The situation of first increases and then decreases can also be presented with the variation of dynamic internal resistance for output power, then the peak of the output power measured
Value is exactly the peak power output of electrothermal module.
Refering to Fig. 3, another embodiment of the present invention provides a kind of device for measuring electrothermal module peak power output, packet
It includes：
First variation range determining module 301, for obtaining the variation range of the output current of electrothermal module, according to described
The variation range of output current and the hot junction input thermal energy of electrothermal module and the variation relation of the output current, determine institute
State the variation range of hot junction input thermal energy.
Second variation range determining module 302, for inputting the variation range of thermal energy and the heat according to the hot junction
The variation relation of the thermoelectric material mean temperature of end input thermal energy and electrothermal module, determines the change of the thermoelectric material mean temperature
Change range.
Third variation range determining module 303, for the variation range according to the thermoelectric material mean temperature, Yi Jire
The variation relation of electric material conductivity and thermoelectric material mean temperature, the dynamic internal resistance of thermoelectric material conductivity and electrothermal module
Variation relation determines the variation range of the dynamic internal resistance.
Output power measurement module 304, in the variation range of the dynamic internal resistance, gradually adjusting electrothermal module
The resistance value of external test resistance, and measure the output power of electrothermal module under each test resistance resistance value.
Peak power output determining module 305 for the output power of the electrothermal module according to measurement, determines electrothermal module
Peak power output.
Further, the device for measuring electrothermal module peak power output further includes：
Average dynamic internal resistance determining module for the variation range according to the dynamic internal resistance, determines the dynamic internal resistance
Variation range in average dynamic internal resistance.
Initial resistance value adjustment module, for adjusting the initial resistance value of the test resistance equal to the average dynamic internal resistance.
Further, the output power measurement module 304 includes：
It is initial to adjust direction determining mould, in the variation range of the dynamic internal resistance, determining the test resistance
Initial adjust direction；
First output power measurement module, for it is described it is initial adjusting direction, gradually adjust the test resistance
Resistance value, and measure the output power of electrothermal module under each test resistance resistance value；
Second output power measurement module, for when there is reduction trend in the output power of the electrothermal module of measurement,
In the initial opposite direction for adjusting direction, the resistance value of the test resistance is gradually adjusted, and measures each test resistance resistance
The output power of the lower electrothermal module of value.
Further, the device for measuring electrothermal module peak power output further includes：
Relationship determination module, for determining the output current of the hot junction of electrothermal module input thermal energy and electrothermal module
Variation relation is：
Wherein, parameter A=Rh-(1-η)Rc, parameter B=
1-0.5η+K[Rh+(1-η)Rc], Tc、ThRespectively electrothermal module cool and heat ends temperature, QhHot junction for electrothermal module inputs thermal energy,
η is the conversion efficiency of thermoelectric of electrothermal module, and N is the P-N galvanic couple logarithms in electrothermal module, and α is the Seebeck coefficient of electrothermal module,
K is the thermal conductivity factor of electrothermal module, and I is the output current of electrothermal module.
Determine that the hot junction input thermal energy and the variation relation of the thermoelectric material mean temperature are：
Wherein, parameter A
=Rh-(1-η)Rc, TjFor the mean temperature of thermoelectric material, Tc、ThRespectively electrothermal module cool and heat ends temperature, Tcj、ThjRespectively
The cool and heat ends junction temperature of thermoelectric material, QhHot junction for electrothermal module inputs thermal energy, Rc、RhRespectively electrothermal module is hot and cold
Dead resistance is held, η is the conversion efficiency of thermoelectric of electrothermal module.
The variation relation for determining the thermoelectric material conductivity and the thermoelectric material mean temperature is：
Wherein, σn、σpThe respectively N-type of electrothermal module, the conductivity of p-type thermoelectric material, TjFor the average temperature of thermoelectric material
Degree.
Determine that the thermoelectric material conductivity and the variation relation of the dynamic internal resistance are：
Wherein, N be electrothermal module in P-N galvanic couple logarithms, hn、hpRespectively electrothermal module
N-type, the arm of p-type thermoelectric material it is high, ln、lpThe respectively N-type of electrothermal module, the p-type thermoelectric material cross section length of side, σn、σpPoint
Not Wei the N-type of electrothermal module, p-type thermoelectric material in mean temperature TjUnder conductivity, RiIt is electrothermal module in mean temperature TjUnder
Dynamic internal resistance.
Further, the peak power output determining module 305 includes：
Output power peak value determining module, for the output power of the electrothermal module according to measurement, determines electrothermal module
The peak value of output power.
Peak power output determination sub-module for the peak value of the output power according to electrothermal module, determines electrothermal module
Peak power output.
It is set as shown in figure 4, further embodiment of this invention provides a kind of terminal for measuring electrothermal module peak power output
Standby, the terminal device 4 of the measurement electrothermal module peak power output of the embodiment includes：It processor 40, memory 41 and deposits
The computer program 42 that can be run in the memory 41 and on the processor 40 is stored up, such as measures electrothermal module maximum
The program of output power.The processor 30 realizes that above-mentioned each measurement electrothermal module is maximum when performing the computer program 42
Step in the embodiment of the method for output power, such as step S101 to S105 shown in FIG. 1.Alternatively, the processor 40 is held
The function of each module/unit in above-mentioned each device embodiment, such as module shown in Fig. 3 are realized during the row computer program 42
301 to 305 function.
Illustratively, the computer program 42 can be divided into one or more module/units, it is one or
Multiple module/units are stored in the memory 41, and are performed by the processor 40, to complete the present invention.Described one
A or multiple module/units can be the series of computation machine program instruction section that can complete specific function, which is used for
Implementation procedure of the computer program 42 in the terminal device 4 for measuring electrothermal module peak power output is described.Example
Such as, the computer program 42 can be divided into synchronization module, summarizing module, acquisition module, return to module (in virtual bench
Module), the concrete function of each module is as follows：
The variation range of the output current of electrothermal module is obtained, according to the variation range and thermoelectricity of the output current
The variation relation of the hot junction input thermal energy of module and the output current of electrothermal module determines the variation model of the hot junction input thermal energy
It encloses.
The variation range of thermal energy and the thermoelectricity material of hot junction input thermal energy and electrothermal module are inputted according to the hot junction
Expect the variation relation of mean temperature, determine the variation range of the thermoelectric material mean temperature.
According to the variation range of the thermoelectric material mean temperature and thermoelectric material conductivity and the average temperature of thermoelectric material
The variation relation of the dynamic internal resistance of the variation relation of degree, thermoelectric material conductivity and electrothermal module determines the dynamic internal resistance
Variation range.
In the variation range of the dynamic internal resistance, the resistance value of the external test resistance of electrothermal module is gradually adjusted, and is surveyed
Measure the output power of electrothermal module under each test resistance resistance value.
According to the output power of the electrothermal module of measurement, the peak power output of electrothermal module is determined.
Further, the concrete function of modules further includes：
According to the variation range of the dynamic internal resistance, determine in the average dynamic in the variation range of the dynamic internal resistance
Resistance；
The initial resistance value for adjusting the test resistance is equal to the average dynamic internal resistance.
Further, the concrete function of modules further includes：
The hot junction input thermal energy of the electrothermal module and the variation relation of the output current of electrothermal module are：
Wherein, parameter A=Rh-(1-η)Rc, parameter B=
1-0.5η+K[Rh+(1-η)Rc], Tc、ThRespectively electrothermal module cool and heat ends temperature, QhHot junction for electrothermal module inputs thermal energy,
η is the conversion efficiency of thermoelectric of electrothermal module, and N is the P-N galvanic couple logarithms in electrothermal module, and α is the Seebeck coefficient of electrothermal module,
K is the thermal conductivity factor of electrothermal module, and I is the output current of electrothermal module.
The hot junction input thermal energy and the variation relation of the thermoelectric material mean temperature are：
Wherein, parameter A
=Rh-(1-η)Rc, TjFor the mean temperature of thermoelectric material, Tc、ThRespectively electrothermal module cool and heat ends temperature, Tcj、ThjRespectively
The cool and heat ends junction temperature of thermoelectric material, QhHot junction for electrothermal module inputs thermal energy, Rc、RhRespectively electrothermal module is hot and cold
Dead resistance is held, η is the conversion efficiency of thermoelectric of electrothermal module.
The variation relation of the thermoelectric material conductivity and the thermoelectric material mean temperature is：
Wherein, σn、σpThe respectively N-type of electrothermal module, the conductivity of p-type thermoelectric material, TjFor the average temperature of thermoelectric material
Degree.
The thermoelectric material conductivity and the variation relation of the dynamic internal resistance are：
Wherein, N be electrothermal module in P-N galvanic couple logarithms, hn、hpRespectively electrothermal module
N-type, the arm of p-type thermoelectric material it is high, ln、lpThe respectively N-type of electrothermal module, the p-type thermoelectric material cross section length of side, σn、σpPoint
Not Wei the N-type of electrothermal module, p-type thermoelectric material in mean temperature TjUnder conductivity, RiIt is electrothermal module in mean temperature TjUnder
Dynamic internal resistance.
Further, the concrete function of modules further includes：
In the variation range of the dynamic internal resistance, determine that the initial of the test resistance adjusts direction.
On the initial adjusting direction, the resistance value of the test resistance is gradually adjusted, and measures each test resistance resistance
The output power of the lower electrothermal module of value.
When reduction trend occurs in the output power of the electrothermal module of measurement, in the initial opposite direction for adjusting direction
On, the resistance value of the test resistance is gradually adjusted, and measure the output power of electrothermal module under each test resistance resistance value.
Further, the concrete function of modules further includes：
According to the output power of the electrothermal module of measurement, the peak value of the output power of electrothermal module is determined；
According to the peak value of the output power of electrothermal module, the peak power output of electrothermal module is determined.
The terminal device 4 for measuring electrothermal module peak power output can be desktop PC, notebook, palm
The computing devices such as computer and cloud server.The terminal device for measuring electrothermal module peak power output may include, but not
It is only limitted to, processor 40, memory 41.It will be understood by those skilled in the art that Fig. 4 is only to measure electrothermal module maximum output
The example of the terminal device 4 of power does not form the restriction of the terminal device 4 to measuring electrothermal module peak power output, can
To include either combining certain components or different components, such as the measurement thermoelectricity than illustrating more or fewer components
The terminal device of module peak power output can also include input-output equipment, network access equipment, bus etc..
Alleged processor 40 can be central processing unit (Central Processing Unit, CPU), can also be
Other general processors, digital signal processor (Digital Signal Processor, DSP), application-specific integrated circuit
(Application Specific Integrated Circuit, ASIC), ready-made programmable gate array (Field-
Programmable Gate Array, FPGA) either other programmable logic device, discrete gate or transistor logic,
Discrete hardware components etc..General processor can be microprocessor or the processor can also be any conventional processor
Deng.
The memory 41 can be the internal storage unit of the engineering project budget needed for the completion of projects terminal device 4, such as work
The hard disk or memory of journey project budget needed for the completion of projects terminal device 4.The memory 41 can also be the engineering project budget needed for the completion of projects
The plug-in type hard disk being equipped on the External memory equipment of terminal device 4, such as the engineering project budget needed for the completion of projects terminal device 4,
Intelligent memory card (Smart Media Card, SMC), secure digital (Secure Digital, SD) card, flash card (Flash
Card) etc..Further, the memory 41 can also both include the inside of the engineering project budget needed for the completion of projects terminal device 4
Storage unit also includes External memory equipment.The memory 41 is used to store the computer program and the engineering project
Other programs and data needed for budget needed for the completion of projects terminal device.The memory 41, which can be also used for temporarily storing, have been exported
Or the data that will be exported.
It is apparent to those skilled in the art that for convenience of description and succinctly, only with above-mentioned each work(
Can unit, module division progress for example, in practical application, can be as needed and by above-mentioned function distribution by different
Functional unit, module are completed, i.e., the internal structure of described device are divided into different functional units or module, more than completion
The all or part of function of description.Each functional unit, module in embodiment can be integrated in a processing unit, also may be used
To be that each unit is individually physically present, can also two or more units integrate in a unit, it is above-mentioned integrated
The form that hardware had both may be used in unit is realized, can also be realized in the form of SFU software functional unit.In addition, each function list
Member, the specific name of module are not limited to the protection domain of the application also only to facilitate mutually distinguish.Above system
The specific work process of middle unit, module can refer to the corresponding process in preceding method embodiment, and details are not described herein.
Those of ordinary skill in the art may realize that each exemplary lists described with reference to the embodiments described herein
Member and algorithm steps can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are actually
It is performed with hardware or software mode, specific application and design constraint depending on technical solution.Professional technician
Described function can be realized using distinct methods to each specific application, but this realization is it is not considered that exceed
The scope of the present invention.
In embodiment provided by the present invention, it should be understood that disclosed device and method can pass through others
Mode is realized.For example, system embodiment described above is only schematical, for example, the division of the module or unit,
Only a kind of division of logic function, can there is an other dividing mode in actual implementation, such as multiple units or component can be with
With reference to or be desirably integrated into another system or some features can be ignored or does not perform.Another point, it is shown or discussed
Mutual coupling or direct-coupling or communication connection can be by some interfaces, the INDIRECT COUPLING of device or unit or
Communication connection can be electrical, machinery or other forms.
The unit illustrated as separating component may or may not be physically separate, be shown as unit
The component shown may or may not be physical unit, you can be located at a place or can also be distributed to multiple
In network element.Some or all of unit therein can be selected according to the actual needs to realize the mesh of this embodiment scheme
's.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it can also
That each unit is individually physically present, can also two or more units integrate in a unit.Above-mentioned integrated list
The form that hardware had both may be used in member is realized, can also be realized in the form of SFU software functional unit.
If the integrated module/unit realized in the form of SFU software functional unit and be independent product sale or
In use, it can be stored in a computer read/write memory medium.Based on such understanding, the present invention realizes above-mentioned implementation
All or part of flow in example method, can also instruct relevant hardware to complete, the meter by computer program
Calculation machine program can be stored in a computer readable storage medium, the computer program when being executed by processor, it can be achieved that on
The step of stating each embodiment of the method.Wherein, the computer program includes computer program code, the computer program generation
Code can be source code form, object identification code form, executable file or certain intermediate forms etc..The computer-readable medium
It can include：Any entity of the computer program code or device, recording medium, USB flash disk, mobile hard disk, magnetic can be carried
Dish, CD, computer storage, read-only memory (Read-Only Memory, ROM), random access memory (Random
Access Memory, RAM), electric carrier signal, telecommunication signal and software distribution medium etc..It should be noted that the meter
The content that calculation machine readable medium includes can carry out appropriate increase and decrease according to legislation in jurisdiction and the requirement of patent practice,
Such as in certain jurisdictions, according to legislation and patent practice, it is electric carrier signal and electricity that computer-readable medium, which does not include,
Believe signal.
Embodiment described above is merely illustrative of the technical solution of the present invention, rather than its limitations；Although with reference to aforementioned reality
Example is applied the present invention is described in detail, it will be understood by those of ordinary skill in the art that：It still can be to aforementioned each
Technical solution recorded in embodiment modifies or carries out equivalent replacement to which part technical characteristic；And these are changed
Or replace, the spirit and scope for various embodiments of the present invention technical solution that it does not separate the essence of the corresponding technical solution should all
It is included within protection scope of the present invention.
Claims (10)
- A kind of 1. method for measuring electrothermal module peak power output, which is characterized in that include the following steps：The variation range of the output current of electrothermal module is obtained, according to the variation range and electrothermal module of the output current Hot junction input thermal energy and the output current variation relation, determine the variation range of the hot junction input thermal energy；The variation range of thermal energy is inputted according to the hot junction and the thermoelectric material of hot junction input thermal energy and electrothermal module is put down The variation relation of equal temperature determines the variation range of the thermoelectric material mean temperature；According to the variation range of the thermoelectric material mean temperature and thermoelectric material conductivity and thermoelectric material mean temperature The variation relation of the dynamic internal resistance of variation relation, thermoelectric material conductivity and electrothermal module determines the variation of the dynamic internal resistance Range；In the variation range of the dynamic internal resistance, the resistance value of the external test resistance of electrothermal module is gradually adjusted, and is measured each The output power of electrothermal module under a test resistance resistance value；According to the output power of the electrothermal module of measurement, the peak power output of electrothermal module is determined.
- 2. the method according to claim 1 for measuring electrothermal module peak power output, which is characterized in that further include：According to the variation range of the dynamic internal resistance, the average dynamic internal resistance in the variation range of the dynamic internal resistance is determined；The initial resistance value for adjusting the test resistance is equal to the average dynamic internal resistance.
- 3. the method according to claim 1 for measuring electrothermal module peak power output, which is characterized in thatThe hot junction input thermal energy of the electrothermal module and the variation relation of the output current of electrothermal module are：Wherein, parameter A=Rh-(1-η)Rc, parameter B=1-0.5 η+K[Rh+(1-η)Rc], Tc、ThRespectively electrothermal module cool and heat ends temperature, QhHot junction for electrothermal module inputs thermal energy, and η is heat The conversion efficiency of thermoelectric of electric module, N are the P-N galvanic couple logarithms in electrothermal module, and α is the Seebeck coefficient of electrothermal module, and K is heat The thermal conductivity factor of electric module, I are the output current of electrothermal module；The hot junction input thermal energy and the variation relation of the thermoelectric material mean temperature are：Wherein, parameter A=Rh- (1-η)Rc, TjFor the mean temperature of thermoelectric material, Tc、ThRespectively electrothermal module cool and heat ends temperature, Tcj、ThjRespectively thermoelectricity The cool and heat ends junction temperature of material, QhHot junction for electrothermal module inputs thermal energy, Rc、RhRespectively electrothermal module cool and heat ends are posted Raw resistance, η are the conversion efficiency of thermoelectric of electrothermal module；The variation relation of the thermoelectric material conductivity and the thermoelectric material mean temperature is：Wherein, σn、σpThe respectively N-type of electrothermal module, the conductivity of p-type thermoelectric material, TjFor thermoelectric material mean temperature；The thermoelectric material conductivity and the variation relation of the dynamic internal resistance are：Wherein, N be electrothermal module in P-N galvanic couple logarithms, hn、hpRespectively the N-type of electrothermal module, The arm of p-type thermoelectric material is high, ln、lpThe respectively N-type of electrothermal module, the p-type thermoelectric material cross section length of side, σn、σpIt is respectively hot The N-type of electric module, p-type thermoelectric material are in mean temperature TjUnder conductivity, RiIt is electrothermal module in mean temperature TjUnder dynamic Internal resistance.
- 4. the method according to claim 1 for measuring electrothermal module peak power output, which is characterized in that described described In the variation range of dynamic internal resistance, the resistance value of the external test resistance of electrothermal module is gradually adjusted, and measures each test resistance The output power of electrothermal module includes under resistance value：In the variation range of the dynamic internal resistance, determine that the initial of the test resistance adjusts direction；On the initial adjusting direction, the resistance value of the test resistance is gradually adjusted, and measure under each test resistance resistance value The output power of electrothermal module；When there is reduction trend in the output power of the electrothermal module of measurement, in the initial opposite direction for adjusting direction, The resistance value of the test resistance is gradually adjusted, and measures the output power of electrothermal module under each test resistance resistance value.
- 5. the method according to claim 1 for measuring electrothermal module peak power output, which is characterized in that described according to survey The output power of the electrothermal module of amount determines that the peak power output of electrothermal module includes：According to the output power of the electrothermal module of measurement, the peak value of the output power of electrothermal module is determined；According to the peak value of the output power of electrothermal module, the peak power output of electrothermal module is determined.
- 6. a kind of device for measuring electrothermal module peak power output, which is characterized in that including：First variation range determining module, for obtaining the variation range of the output current of electrothermal module, according to the output electricity The variation range of stream and the hot junction input thermal energy of electrothermal module and the variation relation of the output current, determine the hot junction Input the variation range of thermal energy；Second variation range determining module inputs for inputting the variation range of thermal energy and the hot junction according to the hot junction The variation relation of the thermoelectric material mean temperature of thermal energy and electrothermal module determines the variation model of the thermoelectric material mean temperature It encloses；Third variation range determining module, for the variation range and thermoelectric material according to the thermoelectric material mean temperature The variation relation of conductivity and thermoelectric material mean temperature, the variation of the dynamic internal resistance of thermoelectric material conductivity and electrothermal module are closed System determines the variation range of the dynamic internal resistance；Output power measurement module, in the variation range of the dynamic internal resistance, gradually adjusting the external survey of electrothermal module The resistance value of resistance is tried, and measures the output power of electrothermal module under each test resistance resistance value；Peak power output determining module for the output power of the electrothermal module according to measurement, determines the maximum of electrothermal module Output power.
- 7. the device according to claim 6 for measuring electrothermal module peak power output, which is characterized in that further include：Average dynamic internal resistance determining module for the variation range according to the dynamic internal resistance, determines the change of the dynamic internal resistance Average dynamic internal resistance in the range of change；Initial resistance value adjustment module, for adjusting the initial resistance value of test resistance equal to the average dynamic internal resistance.
- 8. the device according to claim 6 for measuring electrothermal module peak power output, which is characterized in that the output work Rate measurement module includes：It is initial to adjust direction determining mould, in the variation range of the dynamic internal resistance, determining the first of the test resistance Begin to adjust direction；First output power measurement module, in the initial adjusting direction, gradually adjusting the resistance value of the test resistance, And measure the output power of electrothermal module under each test resistance resistance value；Second output power measurement module, for when reduction trend occurs in the output power of the electrothermal module of measurement, described In the initial opposite direction for adjusting direction, the resistance value of the test resistance is gradually adjusted, and measure under each test resistance resistance value The output power of electrothermal module.
- 9. a kind of terminal device for measuring electrothermal module peak power output including memory, processor and is stored in described In memory and the computer program that can run on the processor, which is characterized in that the processor performs the calculating The step of method that electrothermal module peak power output is measured as described in claim 1 to 5 any one is realized during machine program.
- 10. a kind of computer readable storage medium, the computer-readable recording medium storage has computer program, and feature exists In realization measurement electrothermal module as described in claim 1 to 5 any one is maximum when the computer program is executed by processor The step of method of output power.
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Granted publication date: 20200526 Termination date: 20211215 |