CN108195878A - The test device and method of a kind of thermal contact resistance - Google Patents
The test device and method of a kind of thermal contact resistance Download PDFInfo
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- CN108195878A CN108195878A CN201711346221.4A CN201711346221A CN108195878A CN 108195878 A CN108195878 A CN 108195878A CN 201711346221 A CN201711346221 A CN 201711346221A CN 108195878 A CN108195878 A CN 108195878A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
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Abstract
The present invention provides the test devices and method of a kind of thermal contact resistance.Apparatus and method of the present invention, it is to utilize two clamping measured pieces of the clamping piece with liquid communication pipeline, and the liquid of certain temperature certain flow is passed through to two clamping pieces respectively, so as to by the heat transfer of liquid in one of clamping piece to the liquid in another clamping piece, and then pass through by measured piece and acquire temperature in two clamping pieces at liquid inlet and liquid outlet and fluid flow obtains the thermal resistance of measured piece.In this way, the thermal resistance after the thermal resistance of two kinds of measured pieces of test and two kinds of measured pieces are overlapped respectively, and the thermal contact resistance between two kinds of measured pieces is obtained by calculating.The present invention is low to operating personnel and device hardware requirement, and accuracy is high, is suitble to commercial Application.By setting the conditions such as different pressures, temperature, it can directly test to obtain the test result under different operating modes, the accurate parameter of theoretical calculation can be provided for traditional simulation technology.
Description
Technical field
The present invention relates to testing of materials field, the test device and method of more particularly to a kind of thermal contact resistance.
Background technology
The heat management of battery, be battery large-scale use core technology and at present restrict battery development bottleneck it
One.Good temperature control, is not only related to performance and the service life of battery, more concerning the safety to battery or even threatens
The security of the lives and property of user.Thermal resistance refers to, when having heat when being transmitted on object, in object both ends temperature difference and heat source
Ratio between power.When heat flows through the interface of two solids being in contact, interface in itself shows hot-fluid significantly
Thermal resistance, referred to as thermal contact resistance.
The thermal resistance of different materials is then an important factor for restricting battery heat exchange efficiency.Other than the intrinsic thermal resistance of material,
Also additional heat transmission resistance, i.e. thermal contact resistance.There are many factor for influencing thermal contact resistance, when two objects contact with each other, no matter
How smooth surface is, always has the defects of microcosmic upper, these defects, can lead to two objects not contacting on microcosmic.These
Discontiguous position, it may be possible to vacuum, it may be possible to air, it is also possible to artificially be filled up and (such as be added in storeroom by heat-conducting medium
Heat-conducting silicone grease), heat is by the heat transfer of gas in these discontiguous gaps and/or heat radiation or heat-conducting silicone grease etc.
Material is transmitted, and their heat-transfer capability is far away from general solid material.And then thermal contact resistance is often than material sheet
The thermal resistance of body is higher by very much.
Prior art research is mostly according to material property, establishes database model, carries out simulation calculation.Specific method
Including：Limited element analysis technique, analysis on Molecular Dynamics method, Monte Carlo random point analytic approach etc..Due to this theory analysis
Method, error are larger, it is necessary to assume that parameter it is also sufficiently complex.In certain slightly complicated operating modes, modeling is complicated during emulation, right
The requirement of analysis personnel and computer hardware are more demanding, and therefore, these methods are not suitable for engineer application.
In electric vehicle, power battery is its sole power source, when power battery carries out high-power output, will be generated
Heat, when temperature of powered cell is higher than its normal working temperature, power battery can be there are security risk, and is less than in temperature dynamic
During power normal battery operation temperature, power output just cannot be effectively performed in power battery, and therefore, it is necessary to a set of power battery temperature
Control system is mediated come the temperature to power battery so that power battery is worked in its safe working temperature section, is ensured
The normal work of power battery.In the power battery temperature control system, need to set cooling fin to power battery so that heat energy
Enough efficiently to transmit, it is also desirable to which installation is used for the hydroecium of heat exchange outside power battery, hydroecium is in contact with cooling fin,
And then the coolant by being recycled in hydroecium carries out the heat exchange of power battery so that the temperature of power battery is in its work
In temperature range.
To realize effective control of temperature of powered cell, the good contact between hydroecium and cooling fin is needed.This is just needed
It must just be considered at the initial stage of electric vehicle research and development with reference to entire vehicle design structure.And then it needs a kind of effectively quick
The means suitable for engineer application obtain thermal contact resistance between hydroecium and cooling fin, be the power battery temperature in entire vehicle design
Control system provides the support of initial data.
Invention content
In view of the above-mentioned deficiencies in the prior art, it is an object of the present invention to provide a kind of test device of thermal contact resistance and side
Method obtains the thermal contact resistance of storeroom by the means for being conducive to industrial realization.
The present invention provides a kind of test device of thermal contact resistance, including：
The first clamping member, the first clamping member offer the first inlet and the first liquid outlet, and first folder
Have in gripping member and be communicated in the first pipe of first inlet and the first liquid outlet, the first coolant is from first feed liquor
Mouth flows into, and is flowed out from first liquid outlet；
Second clamping piece, second clamping piece offer the second inlet and the second liquid outlet, and second folder
Have in gripping member and be communicated in the second pipe of second inlet and the second liquid outlet, the second coolant is from second feed liquor
Mouth flows into, and is flowed out from second liquid outlet；
Measured piece, the measured piece are held between the first clamping member and the second clamping piece；
Temperature sampler group, the temperature sampler group are respectively arranged in first inlet, the first liquid outlet, second
Inlet and the second liquid outlet, to acquire at first inlet, the first liquid outlet, the second inlet and the second liquid outlet
The temperature of coolant；
Monitoring terminal, the monitoring terminal are connected to the temperature sampler group, to record the temperature sampler group institute
The temperature of acquisition and the thermal resistance for calculating the measured piece being held between the first clamping member and the second clamping piece.
Further, the test device of the thermal contact resistance, further includes：
Force application apparatus, the force application apparatus are connected to the first clamping member and the second clamping piece, to be pressed from both sides to described first
Gripping member and the second clamping piece apply external force so that the measured piece is held on securely between the first clamping member and the second clamping piece.
Further, the test device of the thermal contact resistance, further includes：
Insulation, the insulation are set to the periphery of the first clamping member, the second clamping piece and measured piece, to prevent
The first clamping member, the heat radiation of the second clamping piece and measured piece around.
Further, the measured piece includes：
The first single material pieces；
The second single material pieces；And
First material pieces and the second material pieces, first material pieces and the second material pieces are stacked in the first clamping member
And second between clamping piece；
Wherein, first material pieces and the second material pieces are different.
Further, first material pieces are power battery fin material；
Second material pieces are the hydroecium outer wall materials for wrapping up power battery cooling fin.
Further, the test device of the thermal contact resistance, further includes：
Coolant circulation system, the coolant circulation system are connected to first inlet, the first liquid outlet, second
First coolant is flowed into first pipe from first inlet and goes out liquid from described first by inlet and the second liquid outlet
Second coolant is flowed into second pipe from second inlet and is flowed out from second liquid outlet by mouth outflow；
Cooling fluid temperature control system, the cooling fluid temperature control system are connected to the coolant circulation system and the first inlet
Between and the coolant circulation system and the second inlet between, with to flow into first pipe the first coolant and stream
The second coolant for entering second pipe is controlled into trip temperature, so that the first coolant and the second inlet at the first inlet
The constant temperature of second coolant at place.
The present invention also provides a kind of test method of thermal contact resistance, using the survey of as above any one of them thermal contact resistance
Trial assembly is put, and the test method of the thermal contact resistance includes：
It is held on the first material pieces as measured piece between the first clamping member and the second clamping piece, to obtain first
Thermal resistance value；
It is held on the second material pieces as measured piece between the first clamping member and the second clamping piece, to obtain second
Thermal resistance value；
First material pieces and the second material pieces are stacked between the first clamping member and the second clamping piece using as quilt
Part is surveyed, to obtain third thermal resistance value；
Third thermal resistance value is subtracted into the first thermal resistance value and subtracts the second thermal resistance value as first material pieces and the second material
The thermal contact resistance of materials and parts.
Further, first thermal resistance value obtains by the following method：
It is held on the first material pieces as measured piece between the first clamping member and the second clamping piece；
It is passed through the first coolant and the second coolant；
Treat the temperature of the coolant at first inlet, the first liquid outlet, the second inlet and the second liquid outlet not
When changing again, the coolant temperature at first inlet, the first liquid outlet, the second inlet and the second liquid outlet is recorded,
Record the flow of the first coolant and the flow of the second coolant；
According to the coolant temperature at first inlet, the coolant temperature at the first liquid outlet, the second inlet
The flow of coolant temperature, the first coolant and the flow of the second coolant at the coolant temperature at place and the second liquid outlet,
Calculate first thermal resistance value.
Further, second thermal resistance value obtains by the following method：
It is held on the second material pieces as measured piece between the first clamping member and the second clamping piece；
It is passed through the first coolant and the second coolant；
Treat the temperature of the coolant at first inlet, the first liquid outlet, the second inlet and the second liquid outlet not
When changing again, the coolant temperature at first inlet, the first liquid outlet, the second inlet and the second liquid outlet is recorded,
Record the flow of the first coolant and the flow of the second coolant；
According to the coolant temperature at first inlet, the coolant temperature at the first liquid outlet, the second inlet
The flow of coolant temperature, the first coolant and the flow of the second coolant at the coolant temperature at place and the second liquid outlet,
Calculate second thermal resistance value.
Further, the third thermal resistance value obtains by the following method：
First material pieces and the second material pieces are stacked between the first clamping member and the second clamping piece；
It is passed through the first coolant and the second coolant；
Treat the temperature of the coolant at first inlet, the first liquid outlet, the second inlet and the second liquid outlet not
When changing again, the coolant temperature at first inlet, the first liquid outlet, the second inlet and the second liquid outlet is recorded,
Record the flow of the first coolant and the flow of the second coolant；
According to the coolant temperature at first inlet, the coolant temperature at the first liquid outlet, the second inlet
The flow of coolant temperature, the first coolant and the flow of the second coolant at the coolant temperature at place and the second liquid outlet,
Calculate the third thermal resistance value.
The test device of thermal contact resistance of the present invention and the test method of thermal contact resistance, will to operating personnel and device hardware
Ask low, accuracy is high, at low cost, is suitble to commercial Application.Meanwhile the embodiment of the present invention can set the works such as different pressures, temperature
Skill condition, directly test obtain multiple test results under different operating modes, and then theoretical meter can be provided for traditional simulation technology
The accurate parameter of calculation.
Description of the drawings
The following drawings only does schematic illustration and explanation to the present invention, not delimit the scope of the invention.
Fig. 1 is the test device structural schematic block diagram of the thermal contact resistance of the embodiment of the present invention；
Fig. 2 is the test method flow chart of the thermal contact resistance of the embodiment of the present invention；
Fig. 3 is the step flow chart that the first thermal resistance value is obtained in the test method of the thermal contact resistance of the embodiment of the present invention；
Fig. 4 is the step flow chart that the second thermal resistance value is obtained in the test method of the thermal contact resistance of the embodiment of the present invention；
Fig. 5 is the step flow chart that third thermal resistance value is obtained in the test method of the thermal contact resistance of the embodiment of the present invention.
Label declaration
11st, the first clamping member
111st, the first inlet
112nd, the first liquid outlet
113rd, first pipe
12nd, the second clamping piece
121st, the second inlet
122nd, the second liquid outlet
123rd, second pipe
131st, the first temperature sampler
132nd, second temperature collector
133rd, third temperature sampler
134th, four temperature sampler
14th, monitoring terminal
151st, the first force sub-device
152nd, the second force sub-device
16th, insulation
171st, the first cooling liquid cycle subsystem
172nd, the second cooling liquid cycle subsystem
181st, the first coolant temperature control subsystem
182nd, the second coolant temperature control subsystem
2nd, measured piece
Specific embodiment
In order to which the technical features, objects and effects to invention are more clearly understood, now control description of the drawings is of the invention
Specific embodiment, in the various figures identical label represent identical part.
Herein, " schematic " expression " serving as example, example or explanation " should not will be described herein as " showing
Any diagram, the embodiment of meaning property " are construed to a kind of preferred or more advantageous technical solution.
To make simplified form, part related to the present invention is only schematically shown in each figure, and does not represent it
Practical structures as product.In addition, so that simplified form is easy to understand, there is the portion of identical structure or function in some figures
Part only symbolically depicts one of those or has only marked one of those.
Herein, "one" is not offered as being limited to the quantity of relevant portion of the present invention " only this ", and " one
It is a " do not indicate that the situation of the quantity " more than one " for excluding relevant portion of the present invention.
Herein, " on ", " under ", "front", "rear", "left", "right" etc. are only used for representing opposite between relevant portion
Position relationship, and the absolute position of these non-limiting relevant portions.
Herein, " first ", " second " etc. be only used for mutual differentiation rather than represent significance level and sequence and
Existing premise etc. each other.
Herein, the limitation in " equal ", " identical " etc. and non-critical mathematics and/or geometry meaning, also includes
It will be appreciated by those skilled in the art that and the error that the permissions such as makes or uses.
Unless otherwise indicated, numberical range herein not only includes the entire scope in two endpoint, also includes containing
In several subranges therein.
As shown in Figure 1, the test device of the thermal contact resistance of the embodiment of the present invention, clamps including the first clamping member 11, second
Part 12, temperature sampler group, monitoring terminal 14.
Wherein, the first clamping member 11 offers the first inlet 111 and the first liquid outlet 112, and described first
There is the first pipe 113 for being communicated in 111 and first liquid outlet 112 of the first inlet, the first coolant in clamping piece 11
It flows into from first inlet 111, is flowed out after flowing through the first pipe 113 from first liquid outlet 112.
Second clamping piece 12 offers the second inlet 121 and the second liquid outlet 122, and second clamping piece
Have in 12 and be communicated in the second pipe 123 of 121 and second liquid outlet 122 of the second inlet, the second coolant is from described
Second inlet 121 flows into, and is flowed out after flowing through the second pipe 123 from second liquid outlet 122.
The temperature sampler group is respectively arranged in first inlet 111, the first liquid outlet 112, the second inlet
121 and second liquid outlet 122, to acquire first inlet 111, the first liquid outlet 112, the second inlet 121 and second
The temperature of coolant at liquid outlet 122.
Wherein, the temperature sampler group includes the first temperature sampler 131, second temperature collector 132, third temperature
Collector 133, four temperature samplers 134, first temperature sampler 131 are installed on first inlet 111 to acquire
The temperature of the first coolant at first inlet 111, the second temperature collector 132 are installed on first liquid outlet
112 to acquire the temperature of the first coolant at the first liquid outlet 112, and the third temperature sampler 133 is installed on described the
Two inlets 121 to acquire the temperature of the second coolant at the second inlet 121, install by the 4th temperature sampler 134
In second liquid outlet 122 with the temperature of the second coolant at the second liquid outlet 122 of acquisition.
The monitoring terminal 14 is connected to the temperature sampler group, to record the temperature that the temperature sampler group is acquired
Spend and calculate the thermal resistance for the measured piece 2 being held between 11 and second clamping piece 12 of the first clamping member.Specifically, it is described
Monitoring terminal 14 is connected to the first temperature sampler 131, second temperature collector 132, third temperature sampler 133, four temperature
Collector 134, with the first coolant at the temperature of the first coolant at the first inlet 111 of record, the first liquid outlet 112
Temperature, the temperature of the second coolant at the temperature of the second coolant at the second inlet 121 and the second liquid outlet 122
It spends, and the thermal resistance of the measured piece 2 is calculated according to the temperature everywhere recorded.
With continued reference to shown in Fig. 1, in the embodiment of the present invention, the test device of the thermal contact resistance further includes force application apparatus,
The force application apparatus is connected to 11 and second clamping piece 12 of the first clamping member, to be pressed from both sides to the first clamping member 11 and second
Gripping member 12 applies external force so that the measured piece 2 is held on securely between 11 and second clamping piece 12 of the first clamping member.
Specifically, the force application apparatus is by the first force force sub-device 152 of sub-device 151 and second, wherein first applies
Power sub-device 151 is connected to the side of the first clamping member 11 far from measured piece 2, and the second force sub-device 152 is connected to institute
State the second side of the clamping piece 12 far from measured piece 2, and then the first force sub-device 151 and second force sub-device 152
Apply power close to each other, and then measured piece 2 is held on securely to 11 and second clamping piece 12 of the first clamping member
Between one clamping piece 11 and the second clamping piece 12.
With continued reference to shown in Fig. 1, in the embodiment of the present invention, the test device of the thermal contact resistance further includes insulation 16,
The insulation 16 is set to the periphery of the first clamping member 11, the second clamping piece 12 and measured piece 2, to prevent described first
Clamping piece 11, the heat radiation of the second clamping piece 12 and measured piece 2 around.
In the embodiment of the present invention, the measured piece 2 can be：The first single material pieces；The second single material pieces；With
And first material pieces and the second material pieces, first material pieces and the second material pieces be stacked in the first clamping member and second
Between clamping piece, i.e., it is stacked in the first clamping member and the second clamping by what the first material pieces and the second material pieces collectively formed
Material pieces between part；Wherein, first material pieces and the second material pieces are different.
Specifically, the embodiment of the present invention is hot in order to measure the contact between electric automobile power battery cooling fin and hydroecium
Resistance, first material pieces such as power battery fin material, second material pieces are, for example, to wrap up power battery heat dissipation
The hydroecium outer wall materials of piece.
With continued reference to shown in Fig. 1, in the embodiment of the present invention, the test device of the thermal contact resistance further includes coolant and follows
Loop system and cooling fluid temperature control system.Wherein, the coolant circulation system is connected to first inlet 111, first goes out
First coolant is flowed by liquid mouth 112, the second inlet 121 and the second liquid outlet 122 from first inlet 111
One pipeline 113 is simultaneously flowed out from first liquid outlet 112, and second coolant is flowed into the second pipe from second inlet 121
It is simultaneously flowed out from second liquid outlet 122 in road 123.The cooling fluid temperature control system is connected to the coolant circulation system and
Between one inlet 111 and between the coolant circulation system and the second inlet 121, with to flowing into first pipe 113
The first coolant and flow into second pipe 123 the second coolant into trip temperature control so that at the first inlet 111
The constant temperature of 121 the second coolant at first coolant and the second inlet.
Specifically, the coolant circulation system includes the first cooling liquid cycle subsystem 171 and second coolant cycle
Subsystem 172.The first cooling liquid cycle subsystem 171 is connected to 111 and first liquid outlet 112 of the first inlet,
First coolant is flowed into first pipe 113 from first inlet 111 and is flowed out from first liquid outlet 112.Institute
It states the second cooling liquid cycle subsystem 172 and is connected to 121 and second liquid outlet 122 of the second inlet, by the second cooling
Liquid flows into second pipe 123 from second inlet 121 and is flowed out from second liquid outlet 122.
The cooling fluid temperature control system includes the first coolant temperature control subsystem 181 and the second coolant temperature control subsystem
182.The first coolant temperature control subsystem 181 is connected to the first cooling 171 and first inlet of liquid cycle subsystem
Between 111, controlled into trip temperature the first coolant for flowing into first pipe 113, so that the at the first inlet 111
The constant temperature of one coolant.The second coolant temperature control subsystem 182 is connected to the second cooling liquid cycle subsystem
172 and second between inlet 121, controlled into trip temperature the second coolant for flowing into second pipe 123, so that second
The constant temperature of 121 the second coolant at inlet.
About cooling fluid temperature control system, can only the first coolant temperature control subsystem 181 of installation be cooled down without installing second
Liquid temperature control subsystem 182 so that the temperature of the second coolant before flowing into the second inlet 121 is environment temperature (or room
Temperature).
Based on the test device of above-mentioned thermal contact resistance, the embodiment of the present invention additionally provides a kind of test side of thermal contact resistance
Method, this method uses the test device of thermal contact resistance as described above, as shown in Fig. 2, the test method packet of the thermal contact resistance
It includes：
Step 1 is held on the first material pieces as measured piece between the first clamping member and the second clamping piece, to obtain
Obtain the first thermal resistance value；
Step 2 is held on the second material pieces as measured piece between the first clamping member and the second clamping piece, to obtain
Obtain the second thermal resistance value；
Step 3, by the first material pieces and the second material pieces be stacked between the first clamping member and the second clamping piece with
As measured piece, to obtain third thermal resistance value；
Step 4, third thermal resistance value is subtracted into the first thermal resistance value and subtract the second thermal resistance value as first material pieces and
The thermal contact resistance of second material pieces.
In step 4, i.e., the thermal contact resistance of the first material pieces and the second material pieces is obtained by equation below：
The thermal contact resistance of first material pieces and the second material pieces=third thermal resistance value the-the second thermal resistance value of the-the first thermal resistance value
In the embodiment of the present invention, the calculating of thermal resistance value is carried out using equation below.
P=Ph+Pc
Wherein：
PhFor the first inlet, the power of heat source of the first liquid outlet；
PcFor the second inlet, the power of heat source of the second liquid outlet；
Th1 is the first inlet temperature；
Th2 is the first liquid outlet temperature；
Tc1 is the second inlet temperature；
Tc2 is the second liquid outlet temperature；
ChSpecific heat capacity for fluid specific heat capacity, i.e. the first coolant in the first inlet；
QhFor the first inlet fluid flow；
CcSpecific heat capacity for fluid specific heat capacity, i.e. the second coolant in the second inlet；
QcFor the second inlet fluid flow；
ThFor the first inlet side sample temperature；
TcFor the second inlet side sample temperature；
P is total power of heat source；
R is sample thermal resistance value.
As shown in figure 3, in step 1, first thermal resistance value is obtained by the following method：
Step 11 is held on the first material pieces as measured piece between the first clamping member and the second clamping piece；
Step 12 is passed through the first coolant and the second coolant；
Step 13 treats coolant at first inlet, the first liquid outlet, the second inlet and the second liquid outlet
When temperature no longer changes, the coolant at first inlet, the first liquid outlet, the second inlet and the second liquid outlet is recorded
Temperature records the flow of the first coolant and the flow of the second coolant；
Step 14, according to the coolant temperature at first inlet, the coolant temperature at the first liquid outlet, second
The flow of the coolant temperature at coolant temperature and the second liquid outlet, the first coolant at inlet and the second coolant
Flow calculates first thermal resistance value.
As shown in figure 4, in step 2, second thermal resistance value is obtained by the following method：
Step 21 is held on the second material pieces as measured piece between the first clamping member and the second clamping piece；
Step 22 is passed through the first coolant and the second coolant；
Step 23 treats coolant at first inlet, the first liquid outlet, the second inlet and the second liquid outlet
When temperature no longer changes, the coolant at first inlet, the first liquid outlet, the second inlet and the second liquid outlet is recorded
Temperature records the flow of the first coolant and the flow of the second coolant；
Step 24 is according to the coolant temperature at first inlet, the coolant temperature at the first liquid outlet, second
The flow of the coolant temperature at coolant temperature and the second liquid outlet, the first coolant at inlet and the second coolant
Flow calculates second thermal resistance value.
As shown in figure 5, in step 3, the third thermal resistance value is obtained by the following method：
First material pieces and the second material pieces are stacked between the first clamping member and the second clamping piece by step 31；
Step 32 is passed through the first coolant and the second coolant；
Step 33 treats coolant at first inlet, the first liquid outlet, the second inlet and the second liquid outlet
When temperature no longer changes, the coolant at first inlet, the first liquid outlet, the second inlet and the second liquid outlet is recorded
Temperature records the flow of the first coolant and the flow of the second coolant；
Step 34, according to the coolant temperature at first inlet, the coolant temperature at the first liquid outlet, second
The flow of the coolant temperature at coolant temperature and the second liquid outlet, the first coolant at inlet and the second coolant
Flow calculates the third thermal resistance value.
With reference to the above embodiment of the present invention, in actually performing, mainly contact heat can be realized by performing following steps
The acquisition of resistance.
The first step, according to equipment is assembled shown in Fig. 1, until after installation metal A (i.e. the first material pieces).Set certain flow, certain
At a temperature of the first coolant flowed into from the first inlet 111, the first liquid outlet 112 flows out, and sets certain flow, second at a temperature of certain
Coolant is flowed into from the second inlet 121, and the second liquid outlet 122 flows out.After temperature does not continue to variation, the first feed liquor is recorded
The 111, first liquid outlet 112 of mouth, the second inlet 121, the temperature of 122 4 mouths of the second liquid outlet and the first inlet 111
With the flow of the second inlet 121, the temperature of the metal A of 111 side of the first inlet of record records 121 side of the second inlet
The temperature of metal A.The thermal resistance value Ra of metal A can be obtained using above-mentioned formula later.For convenience of calculation, the embodiment of the present invention
In, the first coolant and the second coolant are using same medium coolant, such as water, when adopting water as the first coolant and the
During two coolants, specific heat capacity is 4.2J/ (mlK).
Second step, according to equipment is assembled shown in Fig. 1, until after installation metal B.Set certain flow, certain temperature (in the first step
The flow of first coolant, temperature are identical) under the first coolant flowed into from the first inlet 111, the first liquid outlet 112 flows out,
The second coolant is set at certain flow, certain temperature (identical with the flow of the second coolant, temperature in the first step) from the second feed liquor
Mouth 121 flows into, and the second liquid outlet 122 flows out.After temperature does not continue to variation, the first inlet 111 of record, the first liquid outlet
112nd, the second inlet 121, the temperature of 122 4 mouths of the second liquid outlet and the first inlet 111 and the second inlet 121
Flow, the temperature of the metal B of 111 side of the first inlet of record, the temperature of the metal B of 121 side of the second inlet of record.It adopts later
The thermal resistance value Rb of metal B can be obtained with above-mentioned formula.
Third walks, according to equipment is assembled shown in Fig. 1, until (metal A and metal B are stacked in first to installation metal A and metal B
Between 11 and second clamping piece of clamping piece 12), between adjusting 11 and second clamping piece of the first clamping member after 12 pressure.Set certain
The first coolant is flowed from the first inlet 111 at flow, certain temperature (identical with the flow of the first coolant, temperature in the first step)
Enter, the first liquid outlet 112 flows out, and sets at certain flow, certain temperature (identical with the flow of the second coolant, temperature in the first step)
Second coolant is flowed into from the second inlet 121, and the second liquid outlet 122 flows out.After temperature does not continue to variation, record first
Inlet 111, the first liquid outlet 112, the second inlet 121,122 4 mouths of the second liquid outlet temperature and the first inlet
111 and second inlet 121 flow, the metal A of record the first inlet 111 side and the temperature of metal B samples, record second
The metal A of 121 side of inlet and the temperature of metal B samples.The heat of metal B or metal A can be obtained using above-mentioned formula later
Resistance value Rab.
At this time this pressure (i.e. at this time between 11 and second clamping piece of the first clamping member 12 pressure) and temperature is (i.e. at this time
The temperature of second inlet 121 and the at this time temperature of the second inlet 121) under, thermal contact resistance=Rab- of metal A and metal B
Ra-Rb.If metal A is power battery fin material, metal B is hydroecium outer wall materials, then at this time under this pressure and temperature,
The thermal contact resistance of power battery cooling fin and hydroecium outer wall is：
RContact=Rab-Ra-Rb
Wherein, RContactThermal contact resistance for metal A and metal B.
Further, by setting multiple temperature and pressure test points, and then power battery cooling fin and hydroecium can be obtained
The relation curve that the thermal contact resistance of outer wall changes with temperature and pressure, so as to provide original for electric automobile power battery heat dissipation design
Beginning data foundation.
Embodiment 1
The first step assembles equipment according to Fig. 1, until installing aluminium flake (power battery fin material), i.e. after metal A.Setting
Flow is that the water that 2ml/s temperature is 25 DEG C is flowed into from the first inlet 111, and the first liquid outlet 112 flows out, and flow is 2ml/s's
Water is flowed into from the second inlet 121, and the second liquid outlet 122 flows out.After temperature does not continue to variation, the first inlet is recorded
111st, 111 and of temperature and the first inlet of 122 4 the first liquid outlet 112, the second inlet 121, the second liquid outlet mouths
The flow of second inlet 121 is respectively 25 DEG C, 18 DEG C, 15 DEG C, 16 DEG C, 2ml/s, 2ml/s, records 111 side of the first inlet
Aluminium flake temperature for 18.02 DEG C, the temperature of the aluminium flake of 121 side of the second inlet of record is 17.92 DEG C, and the specific heat capacity of water is
4.2J/ (mlK), and then the aluminium flake i.e. thermal resistance of metal A can be calculated as Ra=0.001984K/W by above-mentioned formula.
Second step assembles equipment according to Fig. 1, until installing copper sheet (hydroecium outer wall materials), i.e. after metal B.Set flow as
2ml/s temperature is that 25 DEG C of water is flowed into from the first inlet 111, and the first liquid outlet 112 flows out, and the water that flow is 2ml/s is from the
Two inlets 121 flow into, and the second liquid outlet 122 flows out.After temperature does not continue to variation, the first inlet 111, first is recorded
Liquid outlet 112, the second inlet 121, the temperature of 122 4 mouths of the second liquid outlet and the first inlet 111 and the second feed liquor
The flow of mouth 121 is respectively 25 DEG C, 18 DEG C, 15 DEG C, 17 DEG C, 2ml/s, 2ml/s, records the copper sheet of 111 side of the first inlet
Temperature is 18.03 DEG C, and the temperature of the copper sheet of 121 side of the second inlet of record is 17.98 DEG C, and then can be counted by above-mentioned formula
Calculation obtains the copper sheet i.e. thermal resistance of metal B as Rb=0.00119K/W.
Third walks, and equipment is assembled according to Fig. 1, until installation aluminium flake and copper sheet, adjust 11 and second clamping piece of the first clamping member
Between 12 pressure after.It sets flow to flow into from the first inlet 111 as the water that 2ml/s temperature is 25 DEG C, the first liquid outlet 112
Outflow, flow are that the water of 2ml/s is flowed into from the second inlet 121, and the second liquid outlet 122 flows out.Treat that temperature does not continue to change
Afterwards, record the first inlet 111, the first liquid outlet 112, the second inlet 121, second 122 4 mouths of liquid outlet temperature with
And first the flow of inlet 111 and the second inlet 121 be respectively 25 DEG C, 16 DEG C, 15 DEG C, 15.5 DEG C, 2ml/s, 2ml/s,
It is 17.99 DEG C to record the aluminium flake of 111 side of the first inlet and the temperature of copper sheet sample, the aluminium flake of 121 side of the second inlet of record
It it is 17.12 DEG C with the temperature of copper sheet sample, and then it is Rab that the entire thermal resistance of aluminium flake and copper sheet, which can be calculated, by above-mentioned formula
=0.012185K/W.
At this time under this pressure and temperature, the thermal contact resistance of aluminium flake and copper sheet is
Rab-Ra-Rb=0.012185-0.001984-0.00119=0.00901K/W.
Embodiment 2
The first step assembles equipment according to Fig. 1, until after installation iron plate (power battery fin material), i.e. after metal A.If
Constant flow is that the water that 1ml/s temperature is 35 DEG C is flowed into from the first inlet 111, and the first liquid outlet 112 flows out, flow 1ml/s
Water flowed into from the second inlet 121, the second liquid outlet 122 flows out.After temperature does not continue to variation, the first inlet is recorded
111st, 111 and of temperature and the first inlet of 122 4 the first liquid outlet 112, the second inlet 121, the second liquid outlet mouths
The flow of second inlet 121 is respectively 35 DEG C, 23 DEG C, 15 DEG C, 16 DEG C, 1ml/s, 1ml/s, records 111 side of the first inlet
Iron plate temperature for 29.71 DEG C, the temperature of the iron plate of 121 side of the second inlet of record is 29.59 DEG C, and then pass through above-mentioned public affairs
The iron plate i.e. thermal resistance of metal A can be calculated as Ra=0.002597K/W in formula.
Second step assembles equipment according to Fig. 1, until after installation stainless steel substrates (hydroecium outer wall materials), i.e. after metal B.Setting
Flow is that the water that 1ml/s temperature is 35 DEG C is flowed into from the first inlet 111, and the first liquid outlet 112 flows out, and flow is 1ml/s's
Water is flowed into from the second inlet 121, and the second liquid outlet 122 flows out.After temperature does not continue to variation, the first inlet is recorded
111st, 111 and of temperature and the first inlet of 122 4 the first liquid outlet 112, the second inlet 121, the second liquid outlet mouths
The flow of second inlet 121 is respectively 35 DEG C, 23 DEG C, 15 DEG C, 17 DEG C, 1ml/s, 1ml/s, records 111 side of the first inlet
Stainless steel substrates temperature for 29.77 DEG C, the temperature of the stainless steel substrates of 121 side of the second inlet of record is 29.71 DEG C, Jin Ertong
The stainless steel substrates i.e. thermal resistance of metal B can be calculated as Ra=0.001429K/W by crossing above-mentioned formula.
Third walks, and equipment is assembled according to Fig. 1, until installation iron plate and stainless steel substrates, adjust the first clamping member 11 and second and press from both sides
Between gripping member after 12 pressure.It sets flow to flow into from the first inlet 111 as the water that 1ml/s temperature is 35 DEG C, first goes out liquid
Mouth 112 flows out, and flow is that the water of 1ml/s is flowed into from the second inlet 121, and the second liquid outlet 122 flows out.At this time record first into
Liquid mouth 111, the first liquid outlet 112, the second inlet 121,122 4 mouths of the second liquid outlet temperature and the first inlet
111 and second the flow of inlet 121 be respectively 35 DEG C, 16 DEG C, 15 DEG C, 15.5 DEG C, 1ml/s, 1ml/s, record the first feed liquor
The iron plate of 111 sides of mouth and the temperature of stainless steel substrates sample are 29.7 DEG C, the iron plate and stainless steel substrates of 121 side of the second inlet of record
The temperature of sample is 29.37 DEG C, and then it is Rab=that the entire thermal resistances of iron plate and stainless steel substrates, which can be calculated, by above-mentioned formula
0.004247K/W。
At this time under this pressure and temperature, the thermal contact resistance of iron plate and stainless steel substrates is
Rab-Ra-Rb=0.004247-0.002597-0.001429=0.000221K/W.
It should be noted that the present invention thermal contact resistance test device in, be not difficult to find out, the first clamping member 11 and by
It surveys between 2 and second clamping piece 12 of part and measured piece 2 and equally exists thermal contact resistance, and in the method for the present invention, it does not account for
The thermal contact resistance of this part, mainly consider the present invention be by measuring the thermal resistance of two kinds of materials respectively after, saying two kinds of materials
Material carries out the measurement that overlapping carries out total thermal resistance, in the measurement and calculating of priority, the contact heat between clamping piece and measured piece
Resistance can by calculate carry out the overwhelming majority counteracting, therefore, in order to simplify calculate, just do not consider further that the first clamping member 11 and by
The thermal contact resistance between 2 and second clamping piece 12 of part and measured piece 2 is surveyed, certainly, if necessary to accurately be measured, then may be used
With on the surface that the first clamping member 11 is in contact with measured piece 2 and on the surface that the second clamping piece 12 is in contact with measured piece 2
The heat-conducting medium of such as heat conductive silica gel one kind is coated, enhances the thermal conductivity in the interface to reduce the shadow transmitted at this to heat
It rings.
The test device of thermal contact resistance of the present invention and the test method of thermal contact resistance, will to operating personnel and device hardware
Ask low, accuracy is high, at low cost, is suitble to commercial Application.Meanwhile the embodiment of the present invention can set the works such as different pressures, temperature
Skill condition, directly test obtain multiple test results under different operating modes, and then theoretical meter can be provided for traditional simulation technology
The accurate parameter of calculation.
It should be appreciated that although this specification is described according to each embodiment, not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solution in each embodiment may also be suitably combined to form people in the art
The other embodiment that member is appreciated that.
Those listed above is a series of to be described in detail only for feasibility embodiment of the invention specifically
It is bright, and not to limit the scope of the invention, all equivalent embodiments made without departing from skill spirit of the present invention or
Change, such as the combination, segmentation or repetition of feature, should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of test device of thermal contact resistance, which is characterized in that including：
The first clamping member (11), the first clamping member (11) offer the first inlet (111) and the first liquid outlet (112),
And have in the first clamping member (11) and be communicated in the first of first inlet (111) and the first liquid outlet (112)
Pipeline (113), the first coolant are flowed into from first inlet (111), and are flowed out from first liquid outlet (112)；
Second clamping piece (12), second clamping piece (12) offer the second inlet (121) and the second liquid outlet (122),
And have in second clamping piece (12) and be communicated in the second of second inlet (121) and the second liquid outlet (122)
Pipeline (123), the second coolant are flowed into from second inlet (121), and are flowed out from second liquid outlet (122)；
Temperature sampler group, the temperature sampler group are respectively arranged in first inlet (111), the first liquid outlet
(112), the second inlet (121) and the second liquid outlet (122), to acquire first inlet (111), the first liquid outlet
(112), the temperature of the coolant at the second inlet (121) and the second liquid outlet (122)；
Monitoring terminal (14), the monitoring terminal (14) is connected to the temperature sampler group, to record the temperature sampler
The acquired temperature of group simultaneously calculates the measured piece (2) being held between the first clamping member (11) and the second clamping piece (12)
Thermal resistance.
2. the test device of thermal contact resistance according to claim 1, which is characterized in that further include：
Force application apparatus, the force application apparatus are connected to the first clamping member (11) and the second clamping piece (12), with to described
One clamping piece (11) and the second clamping piece (12) apply external force so that the measured piece (2) is held on the first clamping member securely
(11) between the second clamping piece (12).
3. the test device of thermal contact resistance according to claim 1, which is characterized in that further include：
Insulation (16), the insulation (16) are set to the first clamping member (11), the second clamping piece (12) and measured piece
(2) periphery, to prevent the first clamping member (11), the heat radiation of the second clamping piece (12) and measured piece (2) around.
4. the test device of thermal contact resistance according to claim 1, which is characterized in that the measured piece (2) includes：
The first single material pieces；
The second single material pieces；And
First material pieces and the second material pieces, first material pieces and the second material pieces are stacked in the first clamping member (11)
And second between clamping piece (12)；
Wherein, first material pieces and the second material pieces are different.
5. the test device of thermal contact resistance according to claim 4, it is characterised in that：
First material pieces are power battery fin material；
Second material pieces are the hydroecium outer wall materials for wrapping up power battery cooling fin.
6. the test device of thermal contact resistance according to claim 1, which is characterized in that further include：
Coolant circulation system, the coolant circulation system are connected to first inlet (111), the first liquid outlet
(112), the second inlet (121) and the second liquid outlet (122) flow the first coolant from first inlet (111)
Enter first pipe (113) and flowed out from first liquid outlet (112), by the second coolant from second inlet (121)
It flows into second pipe (123) and is flowed out from second liquid outlet (122)；
Cooling fluid temperature control system, the cooling fluid temperature control system are connected to the coolant circulation system and the first inlet
(111) between and between the coolant circulation system and the second inlet (121), with to flowing into first pipe (113)
First coolant and the second coolant of inflow second pipe (123) are controlled into trip temperature, so that at the first inlet (111)
The first coolant and the second inlet (121) at the second coolant constant temperature.
7. a kind of test method of thermal contact resistance is filled using the test of such as claim 1 to 6 any one of them thermal contact resistance
It puts, the test method of the thermal contact resistance includes：
It is held on the first material pieces as measured piece (2) between the first clamping member (11) and the second clamping piece (12), with
Obtain the first thermal resistance value；
It is held on the second material pieces as measured piece (2) between the first clamping member (11) and the second clamping piece (12), with
Obtain the second thermal resistance value；
First material pieces and the second material pieces are stacked between the first clamping member (11) and the second clamping piece (12) to make
For measured piece (2), to obtain third thermal resistance value；
Third thermal resistance value is subtracted into the first thermal resistance value and subtracts the second thermal resistance value as first material pieces and the second material pieces
Thermal contact resistance.
8. the test method of thermal contact resistance according to claim 7, which is characterized in that first thermal resistance value passes through as follows
Method obtains：
It is held on the first material pieces as measured piece (2) between the first clamping member (11) and the second clamping piece (12)；
It is passed through the first coolant and the second coolant；
It treats at first inlet (111), the first liquid outlet (112), the second inlet (121) and the second liquid outlet (122)
The temperature of coolant when no longer changing, record first inlet (111), the first liquid outlet (112), the second inlet
(121) and the coolant temperature at the second liquid outlet (122) flow of the first coolant and the flow of the second coolant, are recorded；
According to the coolant temperature at first inlet (111), the coolant temperature at the first liquid outlet (112), second
The flow of the coolant temperature at coolant temperature and the second liquid outlet (122), the first coolant at inlet (121) and
The flow of two coolants calculates first thermal resistance value.
9. the test method of thermal contact resistance according to claim 7, which is characterized in that second thermal resistance value passes through as follows
Method obtains：
It is held on the second material pieces as measured piece (2) between the first clamping member (11) and the second clamping piece (12)；
It is passed through the first coolant and the second coolant；
It treats at first inlet (111), the first liquid outlet (112), the second inlet (121) and the second liquid outlet (122)
The temperature of coolant when no longer changing, record first inlet (111), the first liquid outlet (112), the second inlet
(121) and the coolant temperature at the second liquid outlet (122) flow of the first coolant and the flow of the second coolant, are recorded；
According to the coolant temperature at first inlet (111), the coolant temperature at the first liquid outlet (112), second
The flow of the coolant temperature at coolant temperature and the second liquid outlet (122), the first coolant at inlet (121) and
The flow of two coolants calculates second thermal resistance value.
10. the test method of thermal contact resistance according to claim 7, which is characterized in that the third thermal resistance value passes through such as
Lower method obtains：
First material pieces and the second material pieces are stacked between the first clamping member (11) and the second clamping piece (12)；
It is passed through the first coolant and the second coolant；
It treats at first inlet (111), the first liquid outlet (112), the second inlet (121) and the second liquid outlet (122)
The temperature of coolant when no longer changing, record first inlet (111), the first liquid outlet (112), the second inlet
(121) and the coolant temperature at the second liquid outlet (122) flow of the first coolant and the flow of the second coolant, are recorded；
According to the coolant temperature at first inlet (111), the coolant temperature at the first liquid outlet (112), second
The coolant temperature of coolant temperature and the second liquid outlet (122) at inlet (121), the flow and second of the first coolant
The flow of coolant calculates the third thermal resistance value.
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| CN110186948A (en) * | 2019-05-14 | 2019-08-30 | 重庆大学 | A kind of bearing ring and ball thermal contact resistance measuring system and measurement method |
| CN113764747A (en) * | 2021-08-12 | 2021-12-07 | 岚图汽车科技有限公司 | Method and device for detecting thermal contact resistance of battery thermal management system |
| CN113820601A (en) * | 2020-06-04 | 2021-12-21 | 蜂巢能源科技有限公司 | Information processing method, device, electronic equipment and storage medium |
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