CN113916544A - Battery module thermal management testing device and testing method thereof - Google Patents
Battery module thermal management testing device and testing method thereof Download PDFInfo
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- CN113916544A CN113916544A CN202110958993.3A CN202110958993A CN113916544A CN 113916544 A CN113916544 A CN 113916544A CN 202110958993 A CN202110958993 A CN 202110958993A CN 113916544 A CN113916544 A CN 113916544A
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- 238000012360 testing method Methods 0.000 title claims abstract description 202
- 238000007599 discharging Methods 0.000 claims abstract description 42
- 238000001514 detection method Methods 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims description 35
- 238000010998 test method Methods 0.000 claims description 17
- 238000010438 heat treatment Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 description 11
- 238000013461 design Methods 0.000 description 9
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- 238000010586 diagram Methods 0.000 description 6
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- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/002—Thermal testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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- G01M99/008—Subject matter not provided for in other groups of this subclass by doing functionality tests
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4285—Testing apparatus
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
A battery module thermal management testing arrangement includes: the testing body is provided with a testing cavity, and a detection position for placing the battery module to be tested is arranged in the testing cavity; the charging and discharging equipment is arranged inside or outside the testing body and is used for being electrically connected with the battery module to be tested; the temperature control device is communicated with the test cavity and is used for conveying air with target temperature to the test cavity; and the air volume control device is communicated with the test cavity and is used for conveying air with target air volume to the test cavity. The structure and the testing method of the thermal management testing device for the battery module are improved, the thermal management testing condition of the battery module under different environments such as different temperatures, humidity and air volume is simulated, and the accuracy of the thermal management testing of the battery module is improved.
Description
Technical Field
The invention relates to the technical field of battery packs, in particular to a battery module heat management testing device and a testing method thereof.
Background
Along with the continuous development of new forms of energy, new forms of energy electric automobile's application is more and more extensive, and the aspect such as the mechanical properties of electric motor car, security performance all receives much attention, and the environment, the temperature that battery module was located in the use influence its performance and life greatly, consequently need verify the thermal management system of battery module before battery module formally comes into use to guarantee that the difference in temperature of whole electric core is in the design range in the use.
At present, the verification test method for the air cooling module is to place a test sample in a constant temperature environment box, charge and discharge the module, and observe the temperature difference of a module cell in the test process. However, the test method can only achieve the effect of cooling air at the same temperature under one environment temperature, but the conditions in the actual use process are complicated and variable, and the test result of the test method cannot accurately reflect the actual conditions.
Disclosure of Invention
The invention mainly aims to provide a thermal management testing device and a testing method of a battery module, aiming at simulating the thermal management testing condition of the battery module under different temperature, air volume and other environments so as to improve the accuracy of the thermal management testing of the battery module.
In order to achieve the above object, the present invention provides a thermal management testing apparatus for a battery module, including:
the testing body is provided with a testing cavity, and a detection position for placing the battery module to be tested is arranged in the testing cavity;
the charging and discharging equipment is arranged inside or outside the testing body and is used for being electrically connected with the battery module to be tested;
the temperature control device is communicated with the test cavity and is used for conveying air with target temperature to the test cavity; and
and the air volume control device is communicated with the test cavity and is used for conveying air with target air volume to the test cavity.
Optionally, the battery module thermal management testing device further comprises an air-cooling tool, wherein the air-cooling tool is arranged in the testing cavity to form the detection position and is used for changing the air volume distribution of the battery module to be tested.
Optionally, the air cooling tool is arranged in a trapezoid or a triangle.
Optionally, the air volume control device includes:
a housing;
the controller is arranged on the shell; and
the fan is arranged in the shell and electrically connected with the controller, and an air outlet of the fan is communicated with the test cavity;
and the controller is used for controlling the output power of the fan.
Optionally, the air volume control device further comprises an air volume sensor, and the air volume sensor is electrically connected with the controller and used for detecting an air volume signal;
and the controller is used for controlling the fan to work according to the air volume signal.
Optionally, the temperature control device comprises:
a temperature control box;
the temperature control plate is arranged in the temperature control box;
the heating assembly and/or the refrigerating assembly are arranged in the temperature control box and are electrically connected with the temperature control board;
the temperature sensor is arranged in the test cavity and is electrically connected with the temperature control board so as to be used for detecting a temperature signal; and
the humidity sensor is arranged in the test cavity and electrically connected with the temperature control board so as to be used for detecting a humidity signal;
and the temperature control plate is used for controlling the heating assembly and/or the refrigerating assembly to work according to the temperature signal and the humidity signal.
In order to achieve the above object, the present invention further provides a battery module thermal management testing method, based on the battery module thermal management testing apparatus, where the battery module thermal management testing method includes the following steps:
s10, adjusting the temperature of the test cavity to a first target cooling temperature;
s20, conveying air with a first target air volume to the test cavity;
s30, placing a battery module to be tested on the detection position of the test body, and connecting the battery module with the positive and negative electrodes of the charging and discharging equipment;
s40, controlling the charging and discharging equipment to perform charging and discharging work;
s50, detecting and counting the current temperature values of the battery cells in different areas of the battery module to generate a battery cell temperature time variation curve;
and S60, calculating the battery core temperature difference of the battery module.
Optionally, the step of adjusting the temperature of the test chamber to the first target cooling temperature further includes:
and S11, adjusting the humidity of the test cavity to a first target humidity.
Optionally, the step of controlling the charging and discharging device to perform charging and discharging operations includes:
and S41, controlling the charging and discharging equipment to charge and discharge for a first preset time at a first working current, and continuously and circularly operating in a first preset period.
Optionally, the detecting and counting current temperature values of the battery cells in different areas of the battery module to generate a time variation curve of the cell temperature further includes:
and S51, generating a surface temperature cloud chart of the battery core according to the current temperature values of the battery cores in different areas of the battery module to be tested.
In the technical scheme of the invention, the battery module heat management testing device comprises a testing body, a charging and discharging device, a temperature control device and an air volume control device, wherein the testing body is provided with a testing cavity, and a detection position for placing a battery module to be tested is arranged in the testing cavity; the charging and discharging equipment is arranged inside or outside the testing body and is used for being electrically connected with the battery module to be tested; the temperature control device is communicated with the test cavity and is used for conveying air with target temperature to the test cavity; the air volume control device is communicated with the test cavity and used for conveying air with target air volume to the test cavity. The battery module heat management test system has the advantages that the temperature control device and the air volume control device are arranged, so that the heat management test condition of the battery module under different temperature, air volume and other environments is simulated, and the heat management test accuracy of the battery module is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a thermal management testing apparatus for a battery module according to an embodiment of the present invention;
fig. 2 is a schematic flow chart illustrating a thermal management testing method of a battery module according to an embodiment of the present invention;
FIG. 3 is a test result diagram of a first set of tests of the thermal management test method for a battery module according to the present invention;
FIG. 4 is a test result diagram of a second set of tests of the thermal management test method for a battery module according to the present invention;
fig. 5 is a test result diagram of a third set of tests of the thermal management test method for a battery module according to the present invention;
fig. 6 is a schematic diagram of a cell temperature test position of a battery module in an embodiment of the thermal management test method for the battery module according to the invention;
fig. 7 is a cloud diagram of the surface temperature of the battery cell generated in an embodiment of the thermal management test method for the battery module according to the present invention.
The reference numbers illustrate:
10. a test body; 20. charging and discharging equipment; 30. a temperature control device; 40. an air volume control device; 10a, a test chamber; 50. air cooling the tooling; 60. the battery module to be tested.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B" including either scheme A, or scheme B, or a scheme in which both A and B are satisfied. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides a thermal management testing device for battery modules, which is suitable for testing thermal management systems for charging and discharging various battery modules, in particular to lithium iron phosphate batteries and the like, and is not limited here.
Referring to fig. 1, in an embodiment of the present invention, the battery module thermal management testing apparatus includes a testing body 10, a charging and discharging device 20, a temperature control device 30, and an air volume control device 40, wherein the testing body 10 is formed with a testing cavity 10a, and a detection position for placing a battery module 60 to be tested is arranged in the testing cavity 10 a; the charging and discharging equipment 20 is arranged inside or outside the testing body 10 and is used for being electrically connected with the battery module 60 to be tested; the temperature control device 30 is communicated with the test chamber 10a and is used for conveying air with target temperature to the test chamber 10 a; the air volume control device 40 communicates with the test chamber 10a, and is configured to deliver a target air volume of air to the test chamber 10 a.
In this embodiment, the testing body 10 may be made of plastic or metal, and may be box-shaped or can-shaped, and the testing body 10 may be provided with an opening/closing door for conveniently taking and placing the battery module 60 to be tested and the fixture thereof, and may further be provided with a structure such as an observation window, and the testing body 10 is not particularly limited herein.
The testing chamber 10a may be formed by enclosing the wall of the testing body 10 or enclosing the housing component in the testing body 10, and is usually a closed space, so as to avoid the influence of fluctuations of temperature, humidity, air volume, etc. on the accuracy of the experimental result. The detection position may be formed by a bracket or a workbench, and may also be formed by a fixture or the like to fix one or more battery modules 60 to be tested, which is not limited herein.
The charging/discharging device 20 is an electric device or device that can perform a charging operation and a discharging operation, and is not limited herein. The charging and discharging device 20 is mainly used for simulating different test conditions, so that the test result is closer to the actual situation.
The temperature control device 30 may be a device including a control circuit, a heating and/or cooling member, a temperature sensor, and the like, and may be disposed inside the testing body 10 or outside the testing body 10, and when disposed outside the testing body 10, may be communicated with the testing chamber 10a of the testing body 10 through a pipe, and the temperature control device 30 may be provided with a fan or a fan to accelerate the transportation of the air at the target temperature therein into the testing chamber 10 a. In this embodiment, the temperature control device 30 can rapidly adjust the temperature of the intake air to simulate different temperature and humidity cooling conditions.
In this embodiment, the air volume control device 40 is variable in type, and may include a fan, a blower, an air volume controller, and the like, and may achieve the effect of air volume control by controlling the output power. The air volume control device 40 may be disposed on the testing body 10, or disposed outside the testing body 10, and is communicated with the testing cavity 10a of the testing body 10 through a pipeline.
The testing body 10 of this embodiment is formed with the test chamber 10a, be equipped with in the test chamber 10a and supply the test position that awaits measuring battery module 60 and place, charging and discharging equipment 20 locates inside or outside the testing body 10, be used for being connected with the await measuring battery module 60 electricity, temperature control device 30 communicates with the test chamber 10a, be used for carrying the air of target temperature to test chamber 10a, air volume controlling means 40 communicates with the test chamber 10a, be used for carrying the air of target amount of wind to test chamber 10a, realize the thermal management test condition of battery module under the environment such as simulation different temperatures and amount of wind, the degree of accuracy of battery module thermal management test has been improved.
In order to fix the battery module 60 to be tested and change the air distribution of the battery module, in some embodiments, the thermal management testing apparatus for battery modules may further include an air cooling fixture 50, and the air cooling fixture 50 is disposed in the testing cavity 10a to form a detecting position and change the air distribution of the battery module 60 to be tested.
In this embodiment, the air-cooling fixture 50 may be a trapezoid or a triangle, and may be specifically designed according to the structure of the battery module and the test requirements of the thermal management system, which is not limited herein.
In some embodiments, the air volume control device 40 may include a housing, a controller, and a fan, the controller being disposed on the housing; the fan is arranged in the shell, the fan is electrically connected with the controller, and an air outlet of the fan is communicated with the test cavity 10 a; and the controller can also be used for controlling the output power of the fan. Therefore, the thermal management test condition under different air volume environments is simulated, and the accuracy of the thermal management test of the battery module is further improved.
In this embodiment, in order to further improve the accuracy of the air volume adjustment, the air volume control device 40 may further include an air volume sensor electrically connected to the controller for detecting an air volume signal. And the controller can be used for controlling the fan to work according to the air volume signal.
It can be understood that the controller can achieve the effect of air volume control by controlling the output power of the fan.
It should be noted that in this embodiment, the air outlet of the blower can be communicated with the testing cavity 10a of the testing body 10 through a pipeline.
In this embodiment, the fan may be replaced by a fan, or a combination of a fan and a fan may also be adopted, which is not specifically limited herein.
In order to simulate the thermal management test conditions of the battery module in different temperature environments, in some embodiments, the temperature control device 30 of the thermal management test device of the battery module may include a temperature control box, a temperature control plate, a heating component and/or a cooling component, a temperature sensor and a humidity sensor, wherein the temperature control plate is arranged in the temperature control box; the heating assembly and/or the refrigerating assembly are/is arranged in the temperature control box and are/is electrically connected with the temperature control plate; the temperature sensor is arranged in the test cavity 10a and is electrically connected with the temperature control board for detecting a temperature signal; the humidity sensor is arranged in the test cavity 10a and is electrically connected with the temperature control board for detecting a humidity signal; the temperature control plate can also be used for controlling the heating assembly and/or the refrigerating assembly to work according to the temperature signal and the humidity signal.
In this embodiment, the temperature control device 30 can simulate different inlet air temperatures, so as to simulate different test conditions and verify the limit conditions of the battery module.
The heating component can be a heating plate or a heating rod and other components, the refrigerating component can comprise a compressor, a heat exchanger, a refrigerating pipe and other components, and specific structures of the compressor, the heat exchanger and the refrigerating pipe are not limited.
It should be noted that the controller and the temperature control board can be a single chip, a DSP or an FPGA, both of which can be integrated on the same control circuit board to reduce the volume of the whole device, or can be independent components respectively disposed on the air volume control device 40 and the temperature control device 30, which is not limited herein.
It should be noted that, in the embodiment, in order to show the test data, a display may be provided to display the experimental data.
In order to simulate the thermal management test conditions of the battery module in different environments such as different temperatures, different air volumes and the like and improve the accuracy of the thermal management test of the battery module, the invention also provides a thermal management test method of the battery module, the thermal management test method of the battery module is based on the thermal management test device of the battery module, the specific structure of the thermal management test device of the battery module refers to the embodiment, and the thermal management test method of the battery module is based on the technical scheme of the thermal management test device of the battery module, so that the thermal management test device at least has the same technical effect as the thermal management test device of the battery module, and the technical effect is not explained in the specification.
Referring to fig. 1 and 2, in an embodiment, the method for testing thermal management of a battery module includes the following steps:
s10, adjusting the temperature of the test cavity 10a to a first target cooling temperature;
s20, conveying air with a first target air volume to the test cavity 10 a;
s30, placing the battery module 60 to be tested on the detection position of the test body 10, and connecting the battery module with the anode and the cathode of the charging and discharging equipment 20;
s40, controlling the charging and discharging equipment 20 to perform charging and discharging work;
s50, detecting and counting the current temperature values of the battery cells in different areas of the battery module to generate a battery cell temperature time variation curve;
and S60, calculating the battery core temperature difference of the battery module.
In this embodiment, the temperature control device 30 may output wind with a first target temperature into the testing chamber 10a of the testing body 10, so as to adjust the temperature of the testing chamber 10a to a first target cooling temperature.
Note that, in step S30: the battery module 60 to be tested is placed on the detection position of the test body 10 and connected with the positive electrode and the negative electrode of the battery module and the charging and discharging equipment 20, the air cooling tool 50 and the test sample can be assembled according to requirements during testing, and the assembled sample and the air cooling tool 50 are placed in a constant temperature and humidity box. Before this step S30, the test chamber 10a should be ensured to be under the target test conditions of constant temperature and humidity and constant air volume.
It should be noted that before step S40, it is necessary to wait for the temperature of the battery module 60 to be tested to be in a stable state, and then control the charging and discharging device to perform charging and discharging operations, so as to obtain a more accurate test result.
In this embodiment, the testing body 10 is a constant temperature and humidity chamber, and is configured to simulate the temperature and humidity of the current environment of the battery module; the temperature control device 30 adjusts the temperature of the test cavity 10a to a first target cooling temperature, and adjusts different temperatures to simulate the cooling conditions of modules with different temperature conditions; after the temperature of the cavity to be tested 10a is stable, the air volume control device 40 is started, and the air volume control device 40 controls the input air volume by adjusting the output power. Therefore, this application can simulate the cooling effect of battery module in the vehicle under different temperature, different operating modes through this test system, can simulate comparatively complicated condition, can simulate more for pressing close to actual conditions, has improved the degree of accuracy of battery module thermal management test.
Further, in order to improve the accuracy of the thermal management test of the battery module, the step S40: the step of controlling the charging and discharging device to perform the charging and discharging operation may include:
and S41, controlling the charging and discharging equipment to charge and discharge for a first preset time at a first working current, and continuously and circularly operating in a first preset period. Therefore, the temperature difference of the large surface of each battery cell under different thermal management conditions of the battery module can be detected through repeated charging and discharging tests, and whether the design requirements are met or not is judged.
In order to verify the actual measurement effect of the test method, several thermal management conditions of the battery module are verified through experiments:
1) introducing a test condition (shown in fig. 3) that the air volume temperature is the same as the ambient temperature of the battery module;
2) introducing a test condition (shown in fig. 5) that the air volume temperature is different from the ambient temperature of the battery module;
3) the test conditions of the same environmental temperature and different introduced air volumes (refer to fig. 3 and fig. 4);
4) the test cases (see fig. 4 and 5) were the same in the amount of air introduced and different in the cooling temperature.
The following will be described in detail by taking three sets of test results shown in fig. 3 to 5 as examples:
referring to fig. 3, the ambient temperature of the battery module is controlled to be 25 ℃, 25 ℃ air cooling is introduced, the air volume is 0.3m3/min, the charging and discharging conditions of the charging and discharging device 20 are 50A for charging and discharging 2s, the cycle is 5000 times, the temperature changes of three different positions (as shown in fig. 6) of the large surface of each unit cell (for example, cell 1, cell 3, cell 5, cell 7, cell 12, cell 18, cell 20, cell 22 and cell 24) of the battery module are monitored in the testing process, and the results show that the overall temperature of the battery module is 34-37.6 ℃, the temperature difference is 3.6 ℃, the temperature difference is less than 5 ℃, and the battery module is within the design requirement range.
Referring to fig. 4, the ambient temperature of the battery module is controlled to be 25 ℃, 25 ℃ air cooling is applied, the air volume is 0.35m3/min, the charging and discharging conditions are 50A for charging and discharging for 2s, and the cycle is 5000 times, the temperature change of three different positions (as shown in fig. 6) of the large surface of each unit cell (for example, cell 1, cell 3, cell 5, cell 7, cell 12, cell 18, cell 20, cell 22 and cell 24) of the battery module is monitored in the testing process, and the result shows that the overall temperature of the battery module is between 33.9 ℃ and 36.45 ℃, the temperature difference is 2.55 ℃, the temperature difference is less than 5 ℃, and the battery module is within the design requirement range.
The data in combination with fig. 3 and 4 can be obtained, under the same cooling temperature, the whole temperature difference of the battery module can be reduced by increasing the air cooling air quantity, and the whole temperature of the battery module can be controlled by adjusting the air quantity in the test process.
Referring to fig. 5, the ambient temperature of the battery module is controlled to be 40 ℃, air cooling is performed at 37 ℃, the air volume is 0.35m3/min, the charging and discharging conditions are 50A for 2s of charging and discharging, and the cycle is 5000 times, the temperature changes of three different positions (as shown in fig. 6) of the large surface of each unit cell (for example, cell 1, cell 3, cell 5, cell 7, cell 12, cell 18, cell 20, cell 22 and cell 24) of the battery module are monitored in the testing process, and the results show that the overall temperature of the battery module is between 45.1 ℃ and 48.04 ℃, the temperature difference is 2.94 ℃, and the temperature difference is less than 5 ℃, and are within the design requirement range.
Wherein, can draw in combination with fig. 4 and 5 data, under the same cooling air volume condition, ambient temperature and cooling temperature are different, and battery module temperature distribution is different, but the battery module difference in temperature is close, and the test process accessible air volume controlling means 40 adjusts air volume control battery module temperature.
In conclusion, the test results show that the battery module heat management test system can simulate more complex conditions, the effect is closer to the actual condition, and better reference is provided for practical application.
In an embodiment, the battery module thermal management apparatus may further include a humidity sensor, and after adjusting the temperature of the test chamber 10a to the first target cooling temperature, the method may further include the following steps:
and S11, adjusting the humidity of the test chamber 10a to a first target humidity.
In this embodiment, the humidity of the air can be adjusted by providing a humidifying component in the temperature control device 30 or the air volume control device 40, so that the air introduced into the test chamber 10a reaches the first target humidity value. Therefore, the thermal management test condition of the battery module under the environments with different temperatures, humidity, air volume and the like is simulated, and the accuracy of the thermal management test of the battery module is further improved.
In order to realize that the test result is more intuitive in performance so that the tester can better check and analyze the test result, in an embodiment, referring to fig. 7, the step of detecting and counting the current temperature values of the cells in different areas of the battery module to generate a cell temperature time variation curve may further include:
and S51, generating a surface temperature cloud chart of the battery core according to the current temperature values of the battery cores in different areas of the battery module to be tested.
It should be noted that in this embodiment, a surface temperature cloud chart of the entire module cell may be generated by monitoring temperature changes of three different positions (as shown in fig. 6) on the large surface of each unit cell (for example, cell 1, cell 3, cell 5, cell 7, cell 12, cell 18, cell 20, cell 22, and cell 24) of the battery module during the test process, so that a tester may view and analyze an experimental result.
It should be noted that this step can be implemented by computer simulation in the stage of development and design of the thermal management testing device for battery module, so as to determine whether the thermal management testing device for battery module meets the design requirements, and further adjust the design, so as to obtain the thermal management testing device for battery module that can meet the design requirements. In the subsequent actual testing process, this step may be omitted for improving the testing efficiency, and is not limited herein.
The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The utility model provides a battery module thermal management testing arrangement which characterized in that includes:
the testing body is provided with a testing cavity, and a detection position for placing the battery module to be tested is arranged in the testing cavity;
the charging and discharging equipment is arranged inside or outside the testing body and is used for being electrically connected with the battery module to be tested;
the temperature control device is communicated with the test cavity and is used for conveying air with target temperature to the test cavity; and
and the air volume control device is communicated with the test cavity and is used for conveying air with target air volume to the test cavity.
2. The battery module thermal management testing device of claim 1, further comprising an air-cooling tool, wherein the air-cooling tool is arranged in the testing cavity to form the detection position and is used for changing the air volume distribution of the battery module to be tested.
3. The battery module thermal management testing device of claim 2, wherein the air cooling fixture is trapezoidal or triangular.
4. The battery module thermal management testing device of claim 1, wherein the air volume control device comprises:
a housing;
the controller is arranged on the shell; and
the fan is arranged in the shell and electrically connected with the controller, and an air outlet of the fan is communicated with the test cavity;
and the controller is used for controlling the output power of the fan.
5. The thermal management testing device for the battery module according to claim 4, wherein the air volume control device further comprises an air volume sensor, and the air volume sensor is electrically connected with the controller and used for detecting an air volume signal;
and the controller is used for controlling the fan to work according to the air volume signal.
6. The battery module thermal management test device of claim 1, wherein the temperature control device comprises:
a temperature control box;
the temperature control plate is arranged in the temperature control box;
the heating assembly and/or the refrigerating assembly are arranged in the temperature control box and are electrically connected with the temperature control board;
the temperature sensor is arranged in the test cavity and is electrically connected with the temperature control board so as to be used for detecting a temperature signal; and
the humidity sensor is arranged in the test cavity and electrically connected with the temperature control board so as to be used for detecting a humidity signal;
and the temperature control plate is used for controlling the heating assembly and/or the refrigerating assembly to work according to the temperature signal and the humidity signal.
7. A battery module thermal management test method based on the battery module thermal management test device according to any one of claims 1 to 6, wherein the battery module thermal management test method comprises the following steps:
s10, adjusting the temperature of the test cavity to a first target cooling temperature;
s20, conveying air with a first target air volume to the test cavity;
s30, placing a battery module to be tested on the detection position of the test body, and connecting the battery module with the positive and negative electrodes of the charging and discharging equipment;
s40, controlling the charging and discharging equipment to perform charging and discharging work;
s50, detecting and counting the current temperature values of the battery cells in different areas of the battery module to generate a battery cell temperature time variation curve;
and S60, calculating the battery core temperature difference of the battery module.
8. The battery module thermal management test method of claim 7, wherein the step of adjusting the temperature of the test chamber to the first target cooling temperature is further followed by:
and S11, adjusting the humidity of the test cavity to a first target humidity.
9. The battery module thermal management test method according to claim 7, wherein the step of controlling the charging and discharging equipment to perform charging and discharging operations comprises:
and S41, controlling the charging and discharging equipment to charge and discharge for a first preset time at a first working current, and continuously and circularly operating in a first preset period.
10. The battery module thermal management test method according to claim 7, wherein the step of detecting and counting current temperature values of cells in different regions of the battery module to generate a cell temperature time variation curve further includes:
and S51, generating a surface temperature cloud chart of the battery core according to the current temperature values of the battery cores in different areas of the battery module to be tested.
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