CN118131062B - Testing device for heat exchange piece and control method thereof - Google Patents
Testing device for heat exchange piece and control method thereof Download PDFInfo
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- CN118131062B CN118131062B CN202410557492.8A CN202410557492A CN118131062B CN 118131062 B CN118131062 B CN 118131062B CN 202410557492 A CN202410557492 A CN 202410557492A CN 118131062 B CN118131062 B CN 118131062B
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- 238000012360 testing method Methods 0.000 title claims abstract description 99
- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000004781 supercooling Methods 0.000 claims abstract description 21
- 238000001514 detection method Methods 0.000 claims abstract description 8
- 230000020169 heat generation Effects 0.000 claims description 51
- 230000008859 change Effects 0.000 claims description 13
- 230000003247 decreasing effect Effects 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 9
- 230000009467 reduction Effects 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 abstract description 11
- 230000009286 beneficial effect Effects 0.000 description 9
- 238000001816 cooling Methods 0.000 description 9
- 238000012546 transfer Methods 0.000 description 7
- 239000012535 impurity Substances 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 239000000178 monomer Substances 0.000 description 4
- 238000001035 drying Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 235000015842 Hesperis Nutrition 0.000 description 1
- 235000012633 Iberis amara Nutrition 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K17/00—Measuring quantity of heat
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D27/00—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00
- G05D27/02—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00 characterised by the use of electric means
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The application provides a testing device of a heat exchange piece and a control method thereof, wherein the testing device of the heat exchange piece comprises a compressor, a first heat exchange component, an expansion valve and a current detection piece, and the rotating speed of the compressor and the stroke of a cylinder of the compressor can be adjusted; the first heat exchange assembly comprises a first fan for exchanging heat with the first heat exchanger and the first heat exchanger communicated with the compressor; the expansion valve is connected to one end of the first heat exchanger, which is far away from the compressor, the opening of the expansion valve is adjustable, and the current detection piece is used for obtaining the output current information of the battery; and a heat exchange piece is connected between the compressor and the expansion valve, so that heat exchange medium can circularly flow. In the process of testing the heat exchange piece, the parameters such as the supercooling degree of the heat exchange medium in the heat exchange piece, the flow rate of the heat exchange medium in the heat exchange piece and the like can be adjusted or maintained through the adjustment of the rotating speed of the compressor, the cylinder stroke of the compressor, the rotating speed of the first fan and the opening degree of the expansion valve, so that the heat exchange piece can be tested more comprehensively.
Description
Technical Field
The application relates to the technical field of battery detection, in particular to a testing device of a heat exchange piece and a control method thereof.
Background
The battery has the advantages of high specific energy, high power density and the like, and is widely used in electronic equipment and vehicles, such as mobile phones, notebook computers, battery cars, electric automobiles, electric airplanes, electric ships, electric tools and the like.
Because the temperature has very important influence on the normal operation of the battery, and the heat generated in the operation process of the battery can cause the change of the temperature of the battery, the heat exchange piece is usually arranged for exchanging heat with the battery to maintain the stability of the temperature of the battery. How to test the heat exchange effect of the heat exchange member of the battery under different working conditions is becoming more and more interesting to the person skilled in the art.
Disclosure of Invention
In view of the above problems, the present application provides a testing device for a heat exchange member and a control method thereof, where the testing device for a heat exchange member can perform adjustment of a plurality of parameters during testing of the heat exchange member.
In a first aspect, some embodiments of the present application provide a testing device for a heat exchange member for exchanging heat with a battery, the testing device for a heat exchange member including a compressor, a first heat exchange assembly, an expansion valve, and a current detecting member, a rotation speed of the compressor and a cylinder stroke of the compressor being adjustably set; the first heat exchange assembly comprises a first fan and a first heat exchanger, the first fan is used for exchanging heat to the first heat exchanger, and the first heat exchanger is communicated with the compressor; the expansion valve is connected to one end of the first heat exchanger, which is far away from the compressor, and the opening of the expansion valve can be adjusted; the current detection piece is used for acquiring output current information of the battery; the heat exchange medium can sequentially flow through the compressor, the first heat exchanger, the expansion valve and the heat exchange piece in a circulating way.
In the testing device of the heat exchange piece, the parameters such as the supercooling degree of the heat exchange medium in the heat exchange piece, the flow rate of the heat exchange medium in the heat exchange piece and the like can be adjusted or maintained through the adjustment of the rotating speed of the compressor, the cylinder stroke of the compressor, the rotating speed of the first fan and the opening degree of the expansion valve in the testing process of the heat exchange piece, so that the device is beneficial to more comprehensively testing the heat exchange piece.
According to the testing device for the heat exchange piece provided by some embodiments of the present application, the testing device for the heat exchange piece further comprises a first bypass branch, the first bypass branch comprises a first bypass valve and a second heat exchanger, an inlet of the first bypass valve is communicated with an outlet of the first heat exchanger, an outlet of the first bypass valve is communicated with an inlet of the second heat exchanger, and an outlet of the second heat exchanger is communicated with the compressor.
According to the testing device for the heat exchange piece provided by some embodiments of the application, the testing device for the heat exchange piece further comprises a first branch, a first valve and a check valve, wherein the first valve is communicated between an outlet of the first heat exchanger and an inlet of the first bypass branch, an inlet of the check valve is communicated with an inlet of the first bypass branch, and an outlet of the check valve is communicated with an inlet of the expansion valve; the first branch communicates the outlet of the first heat exchanger with the inlet of the expansion valve.
According to the testing device for the heat exchange piece provided by some embodiments of the application, the testing device for the heat exchange piece further comprises a second bypass branch, the second bypass branch comprises a second bypass valve, an inlet of the second bypass valve is communicated with an inlet of the expansion valve, and an outlet of the second bypass valve is communicated with an inlet of the compressor.
According to the testing device for the heat exchange piece provided by some embodiments of the present application, the testing device for the heat exchange piece further includes a third branch, and the third branch communicates the inlet of the second heat exchanger with the outlet of the heat exchange piece.
According to the testing device for the heat exchange piece provided by some embodiments of the application, the first bypass branch further comprises a third bypass valve, the third bypass valve is arranged between the first bypass valve and the second heat exchanger, the outlet of the heat exchange piece is provided with the return air valve, one end of the third branch is communicated between the third bypass valve and the first bypass valve, and the other end of the third branch is communicated between the outlet of the heat exchange piece and the return air valve.
According to the test device for the heat exchange piece provided by some embodiments of the application, the test device for the heat exchange piece further comprises.
According to the testing device for the heat exchange piece provided by some embodiments of the application, a third heat exchanger, a dry filter and a liquid storage tank are arranged in the second loop.
In a second aspect, some embodiments of the present application further provide a control method of a testing device for a heat exchange member, where the control method is used to control the testing device for a heat exchange member provided by any one of the foregoing technical solutions, and the control method includes:
Acquiring output current information of a battery;
confirming heat generation amount change information of the battery according to the output current information;
and adjusting at least one of the rotating speed of the compressor, the cylinder stroke of the compressor, the rotating speed of the first fan and the opening degree of the expansion valve according to the heat generation amount change information.
According to the control method provided by some embodiments of the present application, in the step of adjusting at least one of the rotation speed of the compressor, the cylinder stroke of the compressor, the rotation speed of the first fan, and the expansion valve opening according to the heat generation amount variation information:
Under the condition that the heat generation amount of the battery is increased, the rotating speed of the compressor is increased, so that the flow rate of the heat exchange medium in the heat exchange piece is increased;
In the case of a reduction in the heat production of the battery, the rotational speed of the compressor is reduced so that the flow rate of the heat exchange medium in the heat exchange member is reduced.
According to the control method provided by some embodiments of the present application, in the step of increasing the rotation speed of the compressor in the case where the heat generation amount of the battery increases, the cylinder stroke of the compressor is reduced so as to maintain the heat exchange medium pressure at the inlet of the expansion valve at the first target value;
In the step of decreasing the rotational speed of the compressor in the case where the heat generation amount of the battery is decreased, the cylinder stroke of the compressor is increased to maintain the heat exchange medium pressure at the inlet of the expansion valve at the first target value.
According to the control method provided by some embodiments of the present application, in the step of reducing the cylinder stroke of the compressor, the opening degree of the expansion valve is reduced so as to maintain the pressure of the heat exchange medium at the outlet of the heat exchange member at the second target value;
In the step of increasing the cylinder stroke of the compressor, the opening degree of the expansion valve is increased so as to maintain the pressure of the heat exchange medium at the outlet of the heat exchange member at the second target value.
According to the control method provided by some embodiments of the present application, in the step of adjusting at least one of the rotation speed of the compressor, the cylinder stroke of the compressor, the rotation speed of the first fan, and the expansion valve opening according to the heat generation amount variation information:
under the condition that the heat generation amount of the battery is increased, the rotating speed of the first fan is increased, so that the supercooling degree of the heat exchange medium in the first heat exchanger is increased;
in the case of a reduction in the heat generation amount of the battery, the rotation speed of the first fan is reduced so that the supercooling degree of the heat exchange medium in the first heat exchanger is reduced.
According to the control method provided by some embodiments of the present application, in the step of adjusting at least one of the rotation speed of the compressor, the cylinder stroke of the compressor, the rotation speed of the first fan, and the expansion valve opening according to the heat generation amount variation information:
Under the condition that the heat generation amount of the battery is increased, increasing the opening degree of the expansion valve so as to maintain the superheat degree of the heat exchange medium at the outlet of the heat exchange piece at a third target value;
In the case where the heat generation amount of the battery is reduced, the opening degree of the expansion valve is reduced so that the degree of superheat of the heat exchange medium at the outlet of the heat exchange member is maintained at the third target value.
The technical scheme provided by the embodiment of the disclosure at least brings the following beneficial effects:
Some embodiments of the application provide a testing device of a heat exchange member, the heat exchange member is used for exchanging heat with a battery, the testing device of the heat exchange member comprises a compressor, a first heat exchange assembly, an expansion valve and a current detection member, and the rotating speed of the compressor and the cylinder stroke of the compressor can be adjusted; the first heat exchange assembly comprises a first fan and a first heat exchanger, the first fan is used for exchanging heat to the first heat exchanger, and the first heat exchanger is communicated with the compressor; the expansion valve is connected to one end of the first heat exchanger, which is far away from the compressor, and the opening of the expansion valve can be adjusted; the current detection piece is used for acquiring output current information of the battery; the heat exchange medium can sequentially flow through the compressor, the first heat exchanger, the expansion valve and the heat exchange piece in a circulating way. In the testing device of the heat exchange piece, the parameters such as the supercooling degree of the heat exchange medium in the heat exchange piece, the flow rate of the heat exchange medium in the heat exchange piece and the like can be adjusted or maintained through the adjustment of the rotating speed of the compressor, the cylinder stroke of the compressor, the rotating speed of the first fan and the opening degree of the expansion valve in the testing process of the heat exchange piece, so that the device is beneficial to more comprehensively testing the heat exchange piece.
The foregoing description is only an overview of the present application, and is intended to be implemented in accordance with the teachings of the present application in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present application more readily apparent.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the figures.
FIG. 1 is a split view of a battery provided in some embodiments of the present application;
FIG. 2 is a schematic diagram of a testing apparatus for heat exchange elements according to some embodiments of the present application;
Fig. 3 is a flowchart of a control method of a testing device for a heat exchange member according to some embodiments of the present application.
In the drawings:
1. a battery; 11. a heat exchange member; 12. a case; 13. a battery cell; 2. a compressor; 3. a first heat exchange assembly; 31. a first fan; 32. a first heat exchanger; 4. an expansion valve; 5. a first bypass branch; 51. a first bypass valve; 52. a second heat exchanger; 53. a third bypass valve; 6. a first branch; 7. a first valve; 8. a check valve; 9. a second bypass branch; 91. a second bypass valve; 10. a third branch; 101. a first loop; 102. a second loop; 1021. a third heat exchanger; 1022. drying the filter; 1023. a liquid storage tank; 103. a gas-liquid separator; 104. and a return air valve.
Detailed Description
Embodiments of the technical scheme of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present application, and thus are merely examples, and are not intended to limit the scope of the present application.
It should be noted that unless otherwise indicated, technical or scientific terms used in the embodiments of the present application should be given the ordinary meanings as understood by those skilled in the art to which the embodiments of the present application belong.
In the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.
Furthermore, the technical terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.
In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to specific circumstances.
In the description of embodiments of the application, unless expressly specified and limited otherwise, a first feature "up" or "down" on a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
Currently, the more widely the battery is used in view of the development of market situation. The battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles, and the like, as well as a plurality of fields such as military equipment, aerospace, and the like.
Since the battery usually generates heat during operation, which causes the temperature of the battery itself and the surrounding environment to rise, a thermal management component is usually disposed in the battery to exchange heat with the battery to control the temperature. The heat exchange member such as the heat exchange plate plays an important role in controlling the temperature of the battery as a member for exchanging heat with the battery, and in order to grasp the heat exchange condition of the heat exchange member with the battery under different conditions, the heat exchange member is required to be tested.
Those skilled in the art generally utilize a heat exchange member testing device to test a heat exchange member, but the heat exchange member testing device in the prior art is relatively single in adjusting parameters in the heat exchange member, and under-test conditions of the heat exchange member easily occur.
In order to adjust a plurality of parameters in the process of testing the heat exchange piece, the application provides a testing device of the heat exchange piece, which comprises a compressor, a first heat exchange component and an expansion valve, wherein the rotating speed of the compressor and the stroke of a cylinder of the compressor can be adjusted; the rotating speed of the first fan in the first heat exchange assembly can be adjusted and is used for exchanging heat for the first heat exchanger, and the first heat exchanger is communicated with the compressor; the opening of the expansion valve is adjustable and is connected to one end of the first heat exchanger, which is far away from the compressor, wherein a heat exchange piece is connected between the compressor and the expansion valve, so that heat exchange medium can sequentially flow through the compressor, the first heat exchanger, the expansion valve and the heat exchange piece in a circulating mode. In the testing device of the heat exchange piece, the parameters such as the supercooling degree of the heat exchange piece, the flow of the heat exchange medium in the heat exchange piece and the like can be adjusted or maintained through the adjustment of the rotating speed of the compressor, the cylinder stroke of the compressor, the rotating speed of the first fan and the opening of the expansion valve in the testing process of the heat exchange piece, so that the heat exchange piece is more comprehensively tested.
The testing device for the heat exchange piece, which is described by the embodiment of the application, is not only suitable for testing the heat exchange piece in batteries and power utilization devices using the batteries, but also can be used for testing the heat exchange piece in equipment such as air conditioners, refrigerators and the like.
The electric device may be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool, or the like. The vehicle can be a fuel oil vehicle, a fuel gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or a range-extended vehicle; spacecraft including airplanes, rockets, space planes, spacecraft, and the like; the electric toy includes fixed or mobile electric toys, such as a game machine, an electric car toy, an electric ship toy, and an electric airplane toy; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railroad power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete shakers, and electric planers, among others.
Fig. 1 is a split view of a battery 1 provided in some embodiments of the present application. As shown in fig. 2, the battery 1 includes a case 12, a heat exchanging member 11, and a battery cell 13, and the battery cell 13 and the heat exchanging member 11 are accommodated in the case 12. The box body 12 is used for providing an accommodating space for the battery cell 13 and the heat exchange piece 11, and the heat exchange piece 11 is used for exchanging heat with the battery cell 13. Illustratively, the heat exchanging member 11 may be directly attached to the surface of the battery cell 13, or may be adhered to the surface of the battery cell 13 by a heat conductive adhesive.
The heat exchange piece 11 can be arranged between the wall body of the box body 12 and the battery monomer 13, and can also be arranged between adjacent battery monomers 13, so that the heat exchange path between the heat exchange piece 11 and the battery monomer 13 is shorter, and the heat exchange effect between the heat exchange piece 11 and the battery monomer 13 is improved.
The technical scheme of the testing device and the control method of the heat exchange member 11 provided by the specific embodiment of the application is further described below.
Some embodiments of the present application provide a testing device for a heat exchange member 11, referring to fig. 2, the heat exchange member 11 tested by the testing device for the heat exchange member 11 is used for exchanging heat with a battery 1, the testing device for the heat exchange member 11 includes a compressor 2, a first heat exchange assembly 3, an expansion valve 4, and a current detecting member (not shown in the figure), and the rotation speed of the compressor 2 and the cylinder stroke of the compressor 2 are adjustably set; the first heat exchange assembly 3 comprises a first fan 31 and a first heat exchanger 32, the rotating speed of the first fan 31 is adjustable, the first fan is used for exchanging heat with the first heat exchanger 32, and the first heat exchanger 32 is communicated with the compressor 2; the expansion valve 4 is connected to one end of the first heat exchanger 32, which is away from the compressor 2, and the opening of the expansion valve 4 can be adjusted; the current detection piece is used for acquiring output current information of the battery 1; wherein a heat exchanging member 11 is connected between the compressor 2 and the expansion valve 4 so that the heat exchanging medium can circulate through the compressor 2, the first heat exchanger 32, the expansion valve 4 and the heat exchanging member 11 in this order.
The testing device of the heat exchange piece 11 can be used for circularly introducing heat exchange medium into the heat exchange piece 11 in the heat exchange process of the heat exchange piece 11, can adjust or maintain parameters such as the supercooling degree of the heat exchange medium in the heat exchange piece 11, the flow of the heat exchange medium in the heat exchange piece 11 and the like, and is beneficial to more comprehensively testing the heat exchange piece 11.
By adjusting the rotation speed of the compressor 2, the output heat exchange medium quantity of the compressor 2 can be adjusted, and the heat exchange medium flow in the heat exchange piece 11 can be adjusted. By way of example, the output heat exchange medium quantity of the compressor 2 can be increased by increasing the rotational speed of the compressor 2, so that the heat exchange medium flow in the heat exchange element 11 can be increased.
The pressure of the heat exchange medium output by the compressor 2 can be obtained by:
Wherein, The pressure of the heat exchange medium is output to the compressor 2,For the pressure of the heat exchange medium sucked into the compressor 2, L is the cylinder stroke length of the compressor 2 and N is the rotational speed of the compressor 2.
The pressure of the heat exchange medium at the inlet of the expansion valve 4 can be obtained by:
Wherein, For the heat exchange medium pressure at the inlet of the expansion valve 4,Is the flow resistance of the heat exchange medium.
From the above formula, it is known that the pressure of the heat exchange medium at the inlet of the expansion valve 4 can be regulated by both the cylinder stroke of the compressor 2 and the rotational speed of the compressor 2.
Through the adjustable setting of cylinder stroke with compressor 2 for compressor 2 exports heat transfer medium volume at single cylinder stroke and can adjust, makes under the cooperation of constant voltage valve in compressor 2, can make under the condition of the rotational speed regulation of compressor 2 through adjusting the cylinder stroke of compressor 2, makes the output heat transfer medium pressure of compressor 2 keep stable, thereby makes the heat transfer medium pressure of the import department of expansion valve 4 keep stable. Illustratively, in case of an increase in the rotational speed of the compressor 2, the flow rate of the heat exchange medium in the heat exchange member 11 increases, and the pressure of the heat exchange medium at the inlet of the expansion valve 4 can be maintained stable by decreasing the cylinder stroke of the compressor 2; in case of a reduced rotation speed of the compressor 2, the flow rate of the heat exchange medium in the heat exchange member 11 is reduced, and the pressure of the heat exchange medium at the inlet of the expansion valve 4 can be maintained stable by increasing the cylinder stroke of the compressor 2.
The first heat exchange assembly 3 may be an assembly for providing a degree of supercooling to a heat exchange medium flowing through the heat exchange member 11 in a test apparatus of the heat exchange member 11. The first heat exchanger 32 is communicated with the compressor 2, and a device capable of exchanging heat between the heat exchange medium flowing out of the compressor 2 and the outside is provided with a medium flow passage, and the heat exchange medium exchanges heat with the outside through the first heat exchanger 32 in the process of flowing through the heat exchange flow passage. The first fan 31 may be a fan for performing heat exchange on the first heat exchanger 32, and by setting the first fan towards the first heat exchanger 32, the air flow formed by the first fan 31 can act on the first heat exchanger 32, which is beneficial to improving the heat exchange capability of the first heat exchanger 32 and the outside.
The heat exchange amount of the first heat exchanger 32 can be obtained by:
Q=KF（t1-t2）
Wherein Q is the heat exchange amount of the first heat exchanger 32, K is the convection heat exchange coefficient of the first heat exchanger 32, F is the heat exchange area of the first heat exchanger 32, and t1-t2 are the temperature difference between the front and back of the airflow flowing through the first heat exchanger 32.
Through the rotational speed adjustable setting of first fan 31 for the convection heat transfer coefficient K of first heat exchanger 32 can be adjusted, thereby can adjust heat exchange quantity Q of first heat exchanger 32, make the supercooling degree of heat transfer medium in heat transfer piece 11 can adjust.
Illustratively, by increasing the rotational speed of the first fan 31, the convective heat transfer coefficient K of the first heat exchanger 32 is increased, and the heat exchange amount Q of the first heat exchanger 32 is increased, so that the supercooling degree of the heat exchange medium flowing through the first heat exchanger 32 is increased, and thus the supercooling degree of the heat exchange medium in the heat exchange member 11 is increased; by reducing the rotational speed of the first fan 31, the convection heat exchange coefficient K of the first heat exchanger 32 is reduced, the heat exchange amount Q of the first heat exchanger 32 is reduced, and the supercooling degree of the heat exchange medium flowing through the first heat exchanger 32 is reduced, so that the supercooling degree of the heat exchange medium in the heat exchange member 11 is reduced.
By setting the opening degree of the expansion valve 4 to be adjustable, the pressure of the heat exchange medium at the outlet of the heat exchange member 11 can be adjusted by adjusting the opening degree of the expansion valve 4 in the case of the flow rate adjustment of the heat exchange medium in the heat exchange member 11.
Illustratively, in the case where the flow rate of the heat exchange medium in the heat exchange member 11 increases, the pressure of the heat exchange medium at the outlet of the heat exchange member 11 can be maintained stable by decreasing the opening degree of the expansion valve 4; in the case where the flow rate of the heat exchange medium in the heat exchange member 11 is reduced, the pressure of the heat exchange medium at the outlet of the heat exchange member 11 can be maintained stable by increasing the opening degree of the expansion valve 4.
The heat exchange piece 11 is detachably arranged in the pipeline between the compressor 2 and the expansion valve 4, so that the heat exchange piece 11 to be tested can be conveniently installed in the testing device of the heat exchange piece 11, heat exchange medium can sequentially and circularly flow through the compressor 2, the first heat exchanger 32, the expansion valve 4 and the heat exchange piece 11, and convenience in testing the heat exchange piece 11 is improved.
The current detecting element can be an ammeter connected in series in the power circuit of the battery 1 or a multimeter connected in series in the power circuit of the battery 1, and can acquire the output current information of the battery 1, so that the heat generating information of the battery 1 can be acquired conveniently. For example, the output current information may be used to determine the heat generation amount of the battery 1 according to joule's law, so that the heat source (battery 1) corresponding to the heat exchange member 11 can be under different working conditions, which is beneficial to more comprehensive testing of the heat exchange member 11.
In the above-mentioned testing device for the heat exchange member 11, in the process of testing the heat exchange member 11, the parameters such as the supercooling degree of the heat exchange medium in the heat exchange member 11, the flow rate of the heat exchange medium in the heat exchange member 11, etc. can be adjusted or maintained by adjusting the rotation speed of the compressor 2, the cylinder stroke of the compressor 2, the rotation speed of the first fan 31 and the opening degree of the expansion valve 4, which is beneficial to more comprehensive testing of the heat exchange member 11.
The test device of the heat exchange member 11 further comprises a first bypass branch 5, the first bypass branch 5 comprises a first bypass valve 51 and a second heat exchanger 52, an inlet of the first bypass valve 51 is communicated with an outlet of the first heat exchanger 32, an outlet of the first bypass valve 51 is communicated with an inlet of the second heat exchanger 52, and an outlet of the second heat exchanger 52 is communicated with the compressor 2.
The first bypass branch 5 may be a bypass branch for the heat exchanger 11 in a test device cooling mode. By communicating the inlet of the first bypass valve 51 with the outlet of the first heat exchanger 32, the outlet of the first bypass valve 51 is communicated with the inlet of the second heat exchanger 52, and the outlet of the second heat exchanger 52 is communicated with the compressor 2, so that the first bypass branch 5 is connected in parallel with the heat exchanging element 11. The switch of the first bypass valve 51 in the first bypass 5 can control the on-off of the first bypass 5, so that the flow rate of the heat exchange medium flowing through the heat exchange member 11 can be adjusted in the cooling mode.
The second heat exchanger 52 may be an overheat evaporator, and the heat exchange medium flowing through the second heat exchanger 52 can absorb heat from the outside, so that impurities in the heat exchange medium can be removed to facilitate the improvement of the purity of the heat exchange medium flowing back to the compressor 2.
The first bypass valve 51 may be a flow control valve, for example, which is capable of adjusting the flow through the first bypass 5 by adjusting the magnitude of its opening, thereby adjusting the flow of the test device of the heat exchange element 11 to the heat exchange element 11 in the cooling mode.
In some embodiments, the testing device of the heat exchange element 11 further comprises a first branch 6, a first valve 7 and a check valve 8, wherein the first valve 7 is communicated between the outlet of the first heat exchanger 32 and the inlet of the first bypass branch 5, the inlet of the check valve 8 is communicated with the inlet of the first bypass branch 5, and the outlet of the check valve 8 is communicated with the inlet of the expansion valve 4; the first branch 6 communicates the outlet of the first heat exchanger 32 with the inlet of the expansion valve 4.
The first branch 6 communicates the outlet of the first heat exchanger 32 with the inlet of the expansion valve 4 such that the first branch 6 can communicate the outlet of the first heat exchanger 32 with the inlet of the expansion valve 4 (mainly in the heating mode of the testing device of the heat exchange element 11) such that the heat exchange medium can flow from the outlet of the first heat exchanger 32 to the inlet of the expansion valve 4.
The first valve 7 is connected between the outlet of the first heat exchanger 32 and the inlet of the first bypass branch 5 and is located in a pipeline connected in parallel with the first branch 6, so that the on-off of the first valve 7 can control whether the heat exchange medium flowing out of the outlet of the first heat exchanger 32 flows to the first bypass branch 5.
By communicating the inlet of the check valve 8 with the inlet of the first bypass branch 5, the outlet of the check valve 8 is communicated with the inlet of the expansion valve 4, so that the heat exchange medium flowing from the outlet of the first heat exchanger 32 to the inlet of the expansion valve 4 is less likely to flow back to the first bypass branch 5.
When the test device of the heat exchanger 11 is in the heating mode, the first valve 7 is closed and the heat exchange medium flowing out of the outlet of the first heat exchanger 32 flows via the first branch 6 to the expansion valve 4. When the testing device of the heat exchanger 11 is in the cooling mode, the first valve 7 is in communication, and the heat exchange medium flowing out of the outlet of the first heat exchanger 32 can flow in decibels after passing through the first valve 7 to the first bypass branch 5 and the check valve 8.
In some embodiments, the testing device of the heat exchange element 11 further comprises a second bypass branch 9, the second bypass branch 9 comprises a second bypass valve 91, an inlet of the second bypass valve 91 is communicated with an inlet of the expansion valve 4, and an outlet of the second bypass valve 91 is communicated with an inlet of the compressor 2.
The second bypass branch 9 is a pipe connected in parallel to the heat exchange member 11, which may be a bypass branch for the test device heating mode of the heat exchange member 11. By communicating the inlet of the second bypass valve 91 with the inlet of the expansion valve 4 and communicating the outlet of the second bypass valve 91 with the inlet of the compressor 2, the on-off of the second bypass valve 91 in the second bypass branch 9 connected in parallel with the heat exchange member 11 can be controlled by the on-off of the second bypass branch 9, so that the flow rate of the heat exchange medium flowing through the heat exchange member 11 can be adjusted in the heating mode.
In some embodiments, the testing device of the heat exchange element 11 further comprises a third branch 10, the third branch 10 communicating the inlet of the second heat exchanger 52 with the outlet of the heat exchange element 11.
The third branch 10 may be a conduit for guiding the heat exchange medium flowing out from the outlet of the heat exchange element 11 to the second heat exchanger 52. The third branch 10 enables the heat exchange medium to flow to the second heat exchanger 52 after flowing out of the heat exchange member 11 by communicating the inlet of the second heat exchanger 52 with the outlet of the heat exchange member 11.
Illustratively, the first bypass 5 further includes a third bypass valve 53, the third bypass valve 53 is disposed between the first bypass valve 51 and the second heat exchanger 52, the outlet of the heat exchange element 11 is provided with a return air valve 104, one end of the third bypass 10 is communicated between the third bypass valve 53 and the first bypass valve 51, and the other end is communicated between the outlet of the heat exchange element 11 and the return air valve 104.
The third bypass valve 53 may be a valve body disposed between the first bypass valve 51 and the inlet of the second heat exchanger 52, so that the on-off of the second bypass valve 91 can control whether the heat exchange medium from the third bypass valve 10 flows into the second heat exchanger 52 by communicating one end of the third bypass valve 10 between the third bypass valve 53 and the first bypass valve 51.
The return air valve 104 can control the flow direction of the heat exchange medium, and reduce the backflow, reflux and countercurrent of the heat exchange medium. By providing the return air valve 104 at the outlet of the heat exchanging element 11, the other end of the third branch 10 is connected between the outlet of the heat exchanging element 11 and the return air valve 104, so that the return air valve 104 and the third bypass valve 53 can cooperate, so that the heat exchanging medium flowing out of the heat exchanging element 11 flows back to the compressor 2 through the third branch 10, the third bypass valve 53 and the second heat exchanger 52 or flows back to the compressor 2 through the return air valve 104.
In an exemplary heating mode of the test device of the heat exchange member 11, when the temperature of the battery 1 is lower and the temperature of the heat exchange medium flowing through the heat exchange member 11 is lower or impurities are more, the air return valve 104 is closed, the third bypass valve 53 is communicated, the heat exchange medium flowing out of the heat exchange member 11 sequentially flows through the third branch 10, the third bypass valve 53 and the second heat exchanger 52, the heat exchange medium flowing through the second heat exchanger 52 can absorb heat from the outside, and impurities in the heat exchange medium can be removed, so that the purity of the heat exchange medium flowing back to the compressor 2 is improved. When the temperature of the heat exchange medium flowing through the heat exchange member 11 is high and the impurity is small, the return air valve 104 is communicated, the third bypass valve 53 is closed, and the heat exchange medium flowing out of the heat exchange member 11 flows through the return air valve 104 and directly flows back to the compressor 2.
The testing device of the heat exchange member 11 further comprises a first circuit 101 and a second circuit 102, the first circuit 101 and the second circuit 102 are connected in parallel between the compressor 2 and the first heat exchanger 32, and the first circuit 101 and the second circuit 102 are respectively used in different working modes.
The first circuit 101 and the second circuit 102 may be two pipes arranged at the outlet of the compressor 2, which are respectively used for the outflow of heat exchange medium of the test device of the heat exchange element 11 in different operation modes. By connecting the first circuit 101 and the second circuit 102 in parallel between the compressor 2 and the first heat exchanger 32, heat exchange medium in different operation modes can flow into the first heat exchanger 32.
Illustratively, a third heat exchanger 1021, a drier-filter 1022, and a liquid reservoir 1023 are provided in the second circuit 102.
The second circuit 102 may be a conduit for the heat exchange medium to be output from the compressor 2 to the outside in the cooling mode by the test device of the heat exchange member 11. The third heat exchanger 1021 can be converted into a liquid state by exchanging heat with the outside to reduce the temperature of the heat exchange medium. The drying filter 1022 mainly plays a role in filtering impurities, and can filter and remove impurities from the heat exchange medium flowing out of the third heat exchanger 1021 and then introduce the filtered heat exchange medium into the liquid storage tank 1023, so that the purity of the heat exchange medium is improved.
In some embodiments, temperature and pressure sensors are provided at both the inlet and outlet of the heat exchange element 11 and at the inlet of the expansion valve 4 to monitor the pressure of the heat exchange medium at the inlet of the expansion valve 4, the pressure of the heat exchange medium at the outlet of the heat exchange element 11, the supercooling degree of the heat exchange medium in the heat exchanger and the superheating degree of the heat exchange medium at the outlet of the heat exchange element 11.
In some embodiments, the inlet of the compressor 2 is further provided with a gas-liquid separator 103, which can process a gaseous heat exchange medium containing a small amount of condensate, so as to realize gas phase purification.
The test device of the heat exchange member 11 further comprises a control module, which is electrically connected to the pressure sensor, the temperature sensor, the compressor 2, the first fan 31 and the expansion valve 4, for example. In some embodiments, a control unit is additionally arranged in the pressure sensor and the temperature sensor, the control unit converts temperature signals and pressure signals of the temperature sensor and the pressure sensor into electric signals and then transmits the electric signals to the control module, the control module calculates state parameters of the current heat exchange medium from the received electric signals, compares the current state parameters of the heat exchange medium with target parameters to obtain the action requirements of the testing device of the heat exchange piece 11 in the next step, and sends action instructions to realize linkage control of all parameters in the testing device of the heat exchange piece 11.
Some embodiments of the present application further provide a control method for controlling the test device of the heat exchange member 11 provided by any one of the foregoing technical solutions, as shown in fig. 3, where the control method includes the following steps:
And S1, acquiring output current information of the battery 1.
In the process of testing the heat exchange condition of the heat exchange member 11 and the battery 1, in the step S1, the control method acquires the output current information of the battery 1, so that the information such as the working state, the heat generating state and the like of the battery 1 can be obtained conveniently based on the output current information of the battery 1.
And S2, confirming heat generation quantity change information of the battery 1 according to the output current information.
In the above step S2, the heat generation amount change information of the battery 1 is determined from the output current information acquired in step S1. The heat generation amount change information of the battery 1 may be whether the heat generation amount of the battery 1 is increased or decreased, so that the control method adjusts the operation of the test device of the heat exchange member 11.
The output current may be used, for example, to determine the amount of heat generated by the battery 1 according to joule's law.
And S3, adjusting at least one of the rotating speed of the compressor 2, the cylinder stroke of the compressor 2, the rotating speed of the first fan 31 and the opening degree of the expansion valve 4 according to the heat generation amount change information.
In the above step S3, the operation condition of the test device of the heat exchanger 11 is adjusted based on the heat generation amount change information acquired in the step S2. The adjustment of the test device of the heat exchanging member 11 may be an adjustment of at least one of the rotation speed of the compressor 2, the cylinder stroke of the compressor 2, the rotation speed of the first fan 31, and the opening degree of the expansion valve 4.
In some embodiments, in the step of adjusting at least one of the rotation speed of the compressor 2, the cylinder stroke of the compressor 2, the rotation speed of the first fan 31, and the opening degree of the expansion valve 4 according to the heat generation amount change information: in the case where the heat generation amount of the battery 1 increases, the rotation speed of the compressor 2 is increased to increase the flow rate of the heat exchange medium in the heat exchange member 11; in the case where the heat generation amount of the battery 1 is reduced, the rotation speed of the compressor 2 is reduced so that the flow rate of the heat exchange medium in the heat exchange member 11 is reduced.
In the above step S3, when the heat generation amount of the battery 1 increases, the demand of the battery 1 for the flow rate of the heat exchange medium in the test device of the heat exchange member 11 increases, and by increasing the rotation speed of the compressor 2, the flow rate of the heat exchange medium output by the compressor 2 increases, so that the flow rate of the heat exchange medium in the heat exchange member 11 also increases, and the heat exchange amount of the heat exchange member 11 and the battery 1 can increase, which is beneficial to maintaining the temperature of the battery 1.
In the above step S3, when the heat generation amount of the battery 1 is reduced, the demand of the battery 1 for the flow rate of the heat exchange medium in the test device of the heat exchange member 11 is reduced, and by reducing the rotation speed of the compressor 2, the flow rate of the heat exchange medium output by the compressor 2 is reduced, so that the flow rate of the heat exchange medium in the heat exchange member 11 is also reduced, and the heat exchange amount of the heat exchange member 11 and the battery 1 can be reduced, which is beneficial to maintaining the temperature of the battery 1.
In some embodiments, in the step of increasing the rotation speed of the compressor 2 in the case where the heat generation amount of the battery 1 increases, the cylinder stroke of the compressor 2 is reduced to maintain the heat exchange medium pressure at the inlet of the expansion valve 4 at the first target value; in the step of decreasing the rotation speed of the compressor 2 in the case where the heat generation amount of the battery 1 is decreased, the cylinder stroke of the compressor 2 is increased so that the heat exchange medium pressure at the inlet of the expansion valve 4 is maintained at the first target value.
In the step of increasing the rotation speed of the compressor 2 in the case where the heat generation amount of the battery 1 increases, the heat exchange medium pressure at the inlet of the expansion valve 4 generally increases as the rotation speed of the compressor 2 increases, but in this step, by decreasing the cylinder stroke of the compressor 2, stable control of the heat exchange medium pressure at the inlet of the expansion valve 4 can be achieved, maintaining the pressure of the heat exchange medium pressure at the inlet of the expansion valve 4 at the first target value.
In the step of reducing the rotation speed of the compressor 2 in the case where the heat generation amount of the battery 1 is reduced, the heat exchange medium pressure at the inlet of the expansion valve 4 is generally reduced due to the reduction in the rotation speed of the compressor 2, but in this step, by increasing the cylinder stroke of the compressor 2, stable control of the heat exchange medium pressure at the inlet of the expansion valve 4 can be achieved, maintaining the pressure of the heat exchange medium pressure at the inlet of the expansion valve 4 at the first target value.
The first target value may be set according to the test device of the heat exchanging member 11 and the actual situation of the heat exchanging member 11.
In some embodiments, in the step of reducing the cylinder stroke of the compressor 2, the opening degree of the expansion valve 4 is reduced to maintain the pressure of the heat exchange medium at the outlet of the heat exchange member 11 at the second target value; in the step of increasing the cylinder stroke of the compressor 2, the opening degree of the expansion valve 4 is increased so as to maintain the pressure of the heat exchange medium at the outlet of the heat exchange member 11 at the second target value.
The step of reducing the cylinder stroke of the compressor 2 may refer to a step of increasing the rotation speed of the compressor 2 and reducing the cylinder stroke of the compressor 2. In this step, since the rotation speed of the compressor 2 is increased, the flow rate of the heat exchange medium flowing through the heat exchange member 11 is increased, and this step can compensate for the increase in pressure of the heat exchange medium at the outlet of the heat exchange member 11 caused by the increase in the flow rate of the heat exchange medium by decreasing the opening degree of the expansion valve 4, it is advantageous to maintain the pressure of the heat exchange medium at the outlet of the heat exchange member 11 at the second target value.
The step of increasing the cylinder stroke of the compressor 2 may refer to a step of decreasing the rotation speed of the compressor 2 and increasing the cylinder stroke of the compressor 2. In this step, since the rotation speed of the compressor 2 is reduced, the flow rate of the heat exchange medium flowing through the heat exchange member 11 is reduced, and this step can compensate for the pressure reduction of the heat exchange medium at the outlet of the heat exchange member 11 caused by the reduction in the flow rate of the heat exchange medium by increasing the opening degree of the expansion valve 4, it is advantageous to maintain the pressure of the heat exchange medium at the outlet of the heat exchange member 11 at the second target value.
The second target value may be set according to the test device of the heat exchanging member 11 and the actual situation of the heat exchanging member 11.
In some embodiments, in the step of adjusting at least one of the rotation speed of the compressor 2, the cylinder stroke of the compressor 2, the rotation speed of the first fan 31, and the opening degree of the expansion valve 4 according to the heat generation amount change information: in the case where the heat generation amount of the battery 1 increases, the rotation speed of the first fan 31 is increased to increase the supercooling degree of the heat exchange medium in the first heat exchanger 32; in the case where the heat generation amount of the battery 1 is reduced, the rotation speed of the first fan 31 is reduced so that the supercooling degree of the heat exchange medium in the first heat exchanger 32 is reduced.
In the above step S3, when the heat generation amount of the battery 1 increases, the cooling capacity of the test device of the heat exchange member 11 is required to be increased by the battery 1, and the supercooling degree of the heat exchange medium can be increased by increasing the rotation speed of the first fan 31, so that the heat exchange medium can take away more heat of the battery 1 through the heat exchange member 11.
In the above step S3, in the case that the heat generation amount of the battery 1 is reduced, the requirement of the battery 1 for the cooling amount of the test device of the heat exchange member 11 is reduced, and by reducing the rotation speed of the first fan 31, the supercooling degree of the heat exchange medium can be reduced, so that the heat of the battery 1 taken away by the heat exchange medium through the heat exchange member 11 is reduced.
In some embodiments, in the step of adjusting at least one of the rotation speed of the compressor 2, the cylinder stroke of the compressor 2, the rotation speed of the first fan 31, and the opening degree of the expansion valve 4 according to the heat generation amount change information: in the case where the heat generation amount of the battery 1 increases, the opening degree of the expansion valve 4 is increased so that the degree of superheat of the heat exchange medium at the outlet of the heat exchange member 11 is maintained at the third target value; in the case where the heat generation amount of the battery 1 is reduced, the opening degree of the expansion valve 4 is reduced so that the degree of superheat of the heat exchange medium at the outlet of the heat exchange member 11 is maintained at the third target value.
In the above step S3, in the case where the heat generation amount of the battery 1 increases, the degree of superheat of the heat exchange medium at the outlet of the heat exchange member 11 increases due to the increase of the heat load of the battery 1, and at this time, by increasing the opening degree of the expansion valve 4, the cooling amount of the unit heat exchange medium increases, so that the unit heat exchange medium can take away more heat, which is advantageous for reducing the degree of superheat of the heat exchange medium at the outlet of the heat exchange member 11, so that the degree of superheat of the heat exchange medium at the outlet of the heat exchange member 11 is maintained at the third target value.
In step S3, when the heat generation amount of the battery 1 is reduced, the degree of superheat of the heat exchange medium at the outlet of the heat exchange element 11 is reduced by the reduction of the heat load of the battery 1, and at this time, the amount of cooling per unit heat exchange medium is reduced by reducing the opening degree of the expansion valve 4, so that the degree of superheat of the heat exchange medium at the outlet of the heat exchange element 11 is maintained at the third target value.
The third target value may be set according to the test device of the heat exchanging member 11 and the actual situation of the heat exchanging member 11.
According to some embodiments of the present application, there is provided a testing device of a heat exchange member 11, the testing device of the heat exchange member 11 including a compressor 2, a first heat exchange assembly 3, an expansion valve 4, a first bypass branch 5, a first branch 6, a first valve 7, a check valve 8, a second bypass branch 9, a third branch 10, a first circuit 101 and a second circuit 102.
The second circuit 102 is communicated between the outlet of the compressor 2 and the inlet of the first heat exchanger 32 in the first heat exchange assembly 3, the second circuit 102 is sequentially provided with a third heat exchanger 1021, a drying filter 1022 and a liquid storage tank 1023 along the flow direction of heat exchange medium, the first valve 7 is communicated with the outlet of the first heat exchanger 32, the check valve 8 is communicated between the outlet of the first valve 7 and the inlet of the expansion valve 4, and the heat exchange element 11 is detachably connected between the outlet of the expansion valve 4 and the inlet of the compressor 2. The first bypass 5 is connected between the outlet of the first valve 7 and the inlet of the compressor 2, and a first bypass valve 51, a third bypass valve 53 and a second heat exchanger 52 are sequentially arranged in the first bypass 5 along the flow direction of the heat exchange medium. The second bypass branch 9 provided with the second bypass valve 91 communicates between the outlet of the heat exchange element 11 and the inlet of the expansion valve 4. The third branch 10 communicates the outlet of the first heat exchanger 32 with the outlet of the check valve 8. The first circuit 101 communicates between the outlet of the compressor 2 and the inlet of the first heat exchanger 32.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application, and are intended to be included within the scope of the appended claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (12)
1. A test device for a heat exchange member for exchanging heat with a battery, comprising:
the rotating speed of the compressor and the cylinder stroke of the compressor can be set in an adjustable mode;
The first heat exchange assembly comprises a first fan and a first heat exchanger, the rotating speed of the first fan is adjustable, the first fan is used for exchanging heat with the first heat exchanger, and the first heat exchanger is communicated with the compressor;
The expansion valve is connected to one end of the first heat exchanger, which is away from the compressor, and the opening of the expansion valve can be adjusted;
The current detection piece is used for acquiring the output current information of the battery;
The first loop and the second loop are connected in parallel between the compressor and the first heat exchanger, and the first loop and the second loop are respectively used for different working modes;
The first bypass branch comprises a first bypass valve and a second heat exchanger, wherein the inlet of the first bypass valve is communicated with the outlet of the first heat exchanger, the outlet of the first bypass valve is communicated with the inlet of the second heat exchanger, and the outlet of the second heat exchanger is communicated with the compressor;
wherein the compressor and the expansion valve are connected with the heat exchange piece, so that the heat exchange medium can circulate through the compressor, the first heat exchanger, the expansion valve and the heat exchange member in this order.
2. The heat exchange member testing device of claim 1, further comprising a first branch, a first valve, and a check valve, the first valve being in communication between the outlet of the first heat exchanger and the inlet of the first bypass branch, the inlet of the check valve being in communication with the inlet of the first bypass branch, the outlet of the check valve being in communication with the inlet of the expansion valve; the first branch communicates an outlet of the first heat exchanger with an inlet of the expansion valve.
3. The heat exchange member testing device of claim 2, further comprising a second bypass branch including a second bypass valve having an inlet in communication with the inlet of the expansion valve and an outlet in communication with the inlet of the compressor.
4. The heat exchange member testing device of claim 1, further comprising a third branch connecting the inlet of the second heat exchanger and the outlet of the heat exchange member.
5. The device for testing a heat exchange member according to claim 4, wherein the first bypass branch further comprises a third bypass valve, the third bypass valve is disposed between the first bypass valve and the second heat exchanger, the outlet of the heat exchange member is provided with a return air valve, one end of the third branch is communicated between the third bypass valve and the first bypass valve, and the other end is communicated between the outlet of the heat exchange member and the return air valve.
6. The device for testing heat exchange elements according to claim 1, wherein a third heat exchanger, a dry filter and a liquid storage tank are provided in the second circuit.
7. A control method of a test device for a heat exchange member, characterized in that the control method is for controlling the test device for a heat exchange member according to any one of claims 1 to 6, the control method comprising:
Acquiring output current information of a battery;
Confirming heat generation amount change information of the battery according to the output current information;
and adjusting at least one of the rotating speed of the compressor, the cylinder stroke of the compressor, the rotating speed of the first fan and the opening degree of the expansion valve according to the heat generation amount change information.
8. The control method according to claim 7, wherein in the step of adjusting at least one of the rotation speed of the compressor, the cylinder stroke of the compressor, the rotation speed of the first fan, and the expansion valve opening degree according to the heat generation amount variation information:
Increasing the rotation speed of the compressor under the condition that the heat generation amount of the battery is increased so as to increase the flow rate of the heat exchange medium in the heat exchange piece;
in the case of a reduction in the heat generation amount of the battery, the rotation speed of the compressor is reduced so that the flow rate of the heat exchange medium in the heat exchange member is reduced.
9. The control method according to claim 8, wherein in the step of increasing the rotation speed of the compressor in the case where the heat generation amount of the battery increases, the cylinder stroke of the compressor is reduced to maintain the heat exchange medium pressure at the inlet of the expansion valve at the first target value;
In the step of decreasing the rotation speed of the compressor in the case where the heat generation amount of the battery is decreased, the cylinder stroke of the compressor is increased so that the heat exchange medium pressure at the inlet of the expansion valve is maintained at the first target value.
10. The control method according to claim 9, characterized in that in the step of reducing the cylinder stroke of the compressor, the opening degree of the expansion valve is reduced so as to maintain the pressure of the heat exchange medium at the heat exchange member outlet at a second target value;
in the step of increasing the cylinder stroke of the compressor, the opening degree of the expansion valve is increased so as to maintain the pressure of the heat exchange medium at the outlet of the heat exchange member at a second target value.
11. The control method according to claim 7, wherein in the step of adjusting at least one of the rotation speed of the compressor, the cylinder stroke of the compressor, the rotation speed of the first fan, and the expansion valve opening degree according to the heat generation amount variation information:
Under the condition that the heat generation amount of the battery is increased, the rotating speed of the first fan is increased, so that the supercooling degree of the heat exchange medium in the first heat exchanger is increased;
And when the heat generation amount of the battery is reduced, reducing the rotating speed of the first fan so as to reduce the supercooling degree of the heat exchange medium in the first heat exchanger.
12. The control method according to claim 7, wherein in the step of adjusting at least one of the rotation speed of the compressor, the cylinder stroke of the compressor, the rotation speed of the first fan, and the expansion valve opening degree according to the heat generation amount variation information:
increasing the opening degree of the expansion valve under the condition that the heat generation amount of the battery is increased so as to maintain the superheat degree of the heat exchange medium at the outlet of the heat exchange piece at a third target value;
and when the heat generation amount of the battery is reduced, reducing the opening degree of the expansion valve so as to maintain the superheat degree of the heat exchange medium at the outlet of the heat exchange piece at a third target value.
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| CN112467246A (en) * | 2020-11-25 | 2021-03-09 | 中国第一汽车股份有限公司 | Battery cooling system and battery cooling control method |
| CN117433118A (en) * | 2022-07-14 | 2024-01-23 | 浙江盾安机电科技有限公司 | Air conditioning system and air conditioning control method |
| CN115320326A (en) * | 2022-08-12 | 2022-11-11 | 杭州绿能新能源汽车部件有限公司 | Thermal management system |
| CN117628602A (en) * | 2023-11-27 | 2024-03-01 | 珠海格力电器股份有限公司 | Air conditioning system, air conditioner and control method |
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| CN115692911A (en) * | 2021-07-30 | 2023-02-03 | 宁德时代新能源科技股份有限公司 | Battery and electric device |
| CN116465108A (en) * | 2022-12-01 | 2023-07-21 | 江苏拓米洛高端装备股份有限公司 | Refrigerating system control method and device and power battery test equipment |
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